CN115514038A - Battery management method, related device and readable storage medium - Google Patents

Abstract

The application discloses a battery management method, a related device and a readable storage medium, wherein the method comprises the following steps: acquiring the duration of a charging/discharging period; determining first parameter information or second parameter information corresponding to the battery in the charging/discharging time period, wherein the first parameter information comprises a to-be-charged amount of the battery, and the second parameter information comprises a to-be-discharged amount of the battery; determining a charging/discharging current corresponding to the charging/discharging time period according to the time length of the charging/discharging time period and the amount to be charged/discharged of the battery; and in the charging period, the charging current is used for charging the battery, or in the discharging period, the battery is controlled to discharge according to the discharging current. The method and the device can effectively reduce the condition that the temperature of the battery cell rises rapidly, and prolong the cycle number and the service life of the battery, thereby realizing higher value in the life cycle of the battery.

Description

A battery management method, related equipment and readable storage medium

technical field

The present application relates to the field of energy control, and in particular to a battery management method, related equipment and a readable storage medium.

Background technique

Due to the unbalanced loads of power generation, power distribution, and power consumption, there is insufficient power supply capacity of the power grid during the peak period of power consumption, but there is a surplus of power in the power grid during the low peak period of power consumption. In order to alleviate the contradiction between power supply and demand, power grid companies often adjust the demand-side power consumption indirectly by adjusting the price lever. The demand-side users optimize the power load, and transfer part of the load of the power grid during the peak period of power consumption to the low power consumption period, so as to reduce the peak-valley load difference of the power grid, ease the pressure on the power grid operation, enhance the emergency adjustment capability of the power grid, optimize resource allocation, and improve the power grid. for safety and economical purposes.

Batteries, as energy storage devices, have been involved in power demand response. However, in the prior art, the solution of using batteries for energy storage and electricity consumption may still have the problem of rapid temperature rise of battery cells and rapid decay of battery life. , which affects the cycle times and life cycle of the battery, and cannot achieve greater value within the life cycle of the battery. Based on this, the present application provides a battery management method.

Contents of the invention

The embodiment of the present application provides a battery management method, related equipment, and a readable storage medium, which can effectively reduce the rapid rise in battery cell temperature, prolong the cycle times and life of the battery, and thus achieve greater value within the battery life cycle .

In the first aspect, the embodiment of the present application provides a battery management method, which may include: determining the charging current, and charging the battery according to the charging current during the charging period; or determining the discharging current, and controlling the battery to Discharging is carried out according to the discharging current during the discharging period; wherein, the determining the charging current includes: determining the charging current corresponding to the charging period according to the length of the charging period and the first parameter information corresponding to the battery during the charging period. The charging current; the first parameter information includes the amount to be charged of the battery; the determining the discharge current includes: according to the length of the discharge period and the second parameter information corresponding to the battery in the discharge period , to determine the discharge current corresponding to the discharge period; the second parameter information includes the battery to-be-discharged capacity.

In the embodiment of the present application, it is different from the scheme of charging according to the set maximum charging current in the charging process in the prior art, or discharging according to the maximum discharge current or the current required by the load. In the process of charging or discharging by using the battery, It can allow the charging current or discharging current to be adjusted, so that the purpose of charging or discharging with a smaller charging current or discharging current can be realized, so as to reduce the impact of large current fast charging or fast discharging on the battery temperature, and thus prolong the battery life. The number of cycles and life of the battery, to achieve greater value in the battery life cycle. Specifically, in the embodiment of the present application, the charging current corresponding to the charging period can be determined according to the length of the charging period and the battery to be charged during the charging period, so that the charging current can be used to charge the battery during the charging period. Charging, or according to the length of the discharge period and the amount of battery to be discharged in the discharge period, determine the discharge current corresponding to the discharge period, so that the battery can use the discharge current to discharge in the discharge period, which is different from the existing technology It is necessary to charge the battery according to the set maximum charging current or discharge the battery according to the maximum discharge current (or the current required by the load), so that the battery can be charged with a smaller charging current, or the battery can be controlled Discharge with a small discharge current to reduce the rapid rise of battery cell temperature.

In a possible implementation manner, the method further includes: obtaining the working current corresponding to the load, wherein the battery supplies power to the load during the discharge period; the determining the discharge current includes: according to the The length of the discharge period and the to-be-discharged capacity of the battery are used to obtain the discharge current to be confirmed; the smallest of the discharge current to be confirmed and the operating current is determined as the discharge current corresponding to the discharge period.

In the embodiment of the present application, the discharge current corresponding to the battery during the discharge period can be determined based on the length of the discharge period, the battery’s capacity to be discharged, and the operating current required by the load. Specifically, it can be determined based on the length of the discharge period and the battery’s Determine the discharge current to be confirmed, then compare the discharge current to be confirmed with the operating current required by the load, and determine the minimum value of the two as the discharge current corresponding to the discharge period, that is, when the discharge current to be confirmed is less than the operating current , the discharge current to be confirmed is determined as the discharge current corresponding to the discharge period to ensure that the discharge capacity to be discharged can cover the entire discharge period, instead of performing rapid discharge according to the size of the working current in order to directly meet the working current demand; and when the discharge current to be confirmed When it is greater than or equal to the working current, the working current is determined as the discharge current corresponding to the discharge period, so as to avoid waste of resources caused by over-discharging of power.

In a possible implementation manner, the second parameter information also includes the rated discharge current of the battery; the determining the discharge current includes: , to obtain the discharge current to be confirmed; determining the smallest of the discharge current to be confirmed, the operating current and the rated discharge current as the discharge current corresponding to the discharge period.

In the embodiment of the present application, the discharge current corresponding to the battery during the discharge period can be determined based on the length of the discharge period, the battery’s capacity to be discharged, the operating current required by the load, and the rated discharge current of the battery. Determine the discharge current to be confirmed by the duration of the period and the battery’s discharge capacity, then compare the discharge current to be confirmed, the operating current required by the load, and the rated discharge current, and determine the minimum value of the three as the discharge current corresponding to the discharge period , that is, when the discharge current to be confirmed is the smallest, the current to be confirmed is determined as the discharge current corresponding to the discharge period to ensure that the amount to be discharged can cover the entire discharge period, rather than according to the size of the working current or according to the size of the working current in order to directly meet the working current demand The rated discharge current is used for rapid discharge; when the operating current of the load is the smallest, the operating current is determined as the discharge current corresponding to the discharge period to avoid resource waste caused by over-discharging; when the rated discharge current is the smallest, the rated discharge current is determined as The discharge current corresponding to the discharge period, to avoid the discharge current exceeding the maximum discharge current value that the battery can withstand, and damage the battery.

In a possible implementation manner, the method further includes: determining the to-be-discharged capacity of the battery based on the remaining charge amount and the lower limit of the charge amount corresponding to the battery in the discharge period.

In the embodiment of the present application, the to-be-discharged capacity of the battery corresponding to the discharge period can be determined according to the remaining charge corresponding to the discharge period and the lower limit of the charge, wherein the remaining charge corresponding to the discharge period can be acquired at the beginning of the discharge period According to previous calculations, the lower limit of the charging capacity can be set by the user according to the actual scene, which has high applicability.

In a possible implementation manner, the acquiring the operating current corresponding to the load includes: predicting based on the historical operating current of the load, and determining the operating current corresponding to the discharging period.

In the embodiment of the present application, obtaining the working current corresponding to the load can be predicted based on the historical working current data of the load, which has high accuracy.

In a possible implementation manner, the method further includes: determining the to-be-charged amount of the battery based on the remaining charge amount and an upper limit of the charge amount corresponding to the charging period of the battery.

In the embodiment of the present application, the amount of battery to be charged corresponding to the charging period can be determined according to the remaining charge corresponding to the discharging period and the upper limit of the charge, wherein the remaining charge corresponding to the discharging period can be acquired at the beginning of the charging period According to previous calculations, the upper limit of the charging capacity can be set by the user according to the actual scene, which has high applicability.

In a possible implementation manner, the first parameter information further includes the rated charging current of the battery; the determining the charging current includes: according to the length of the charging period and the charging capacity of the battery , obtaining the charging current to be confirmed; determining the smallest of the charging current to be confirmed and the rated charging current as the charging current corresponding to the charging period.

In the embodiment of the present application, the charging current corresponding to the battery during the charging period can be determined based on the length of the charging period, the amount of battery to be charged, and the rated charging current. Determine the charging current to be confirmed, and then compare the charging current to be confirmed with the rated charging current, and determine the minimum value of the two as the charging current corresponding to the charging period, that is, when the charging current to be confirmed is less than the rated charging current, the The charging current to be confirmed is determined as the charging current corresponding to the charging period to ensure that the charging process can cover the entire charging period, instead of performing fast charging directly according to the rated charging current for fast charging; and when the charging current to be confirmed is greater than or equal to the rated charging When the current is high, the rated charging current is determined as the charging current corresponding to the charging period, so as to avoid the charging current exceeding the maximum charging current value that the battery can withstand and damage the battery.

In a possible implementation manner, the electricity price in the charging period is greater than the electricity price in the discharging period.

In the embodiment of the present application, the battery can be charged during the period of low electricity price, and the battery can be controlled to discharge during the period of high electricity price, so as to obtain the benefits of shifting peak electricity consumption.

In the second aspect, the embodiment of the present application provides a battery management device, which may include: a control module, used to determine the charging current, and charge according to the charging current; or used to determine the discharge current, and charge according to the discharge current discharge; wherein, the control module includes: a first determination unit, configured to determine the corresponding charging period according to the length of the charging period and the first parameter information corresponding to the battery in the charging period Charging current; the first parameter information includes the amount to be charged of the battery; a second determination unit is configured to determine the battery according to the duration of the discharge period and the second parameter information corresponding to the discharge period of the battery The discharge current corresponding to the discharge period; the second parameter information includes the battery to-be-discharged capacity.

In the embodiment of the present application, it is different from the scheme of charging according to the set maximum charging current in the charging process in the prior art, or discharging according to the maximum discharge current or the current required by the load. In the process of charging or discharging by using the battery, The battery management device can allow the charging current or discharging current to be adjusted, so that the purpose of charging or discharging with a smaller charging current or discharging current can be achieved, thereby reducing the impact of large current fast charging or fast discharging on the battery temperature. In turn, the cycle times and life of the battery can be extended to achieve greater value within the battery life cycle. Specifically, in the embodiment of the present application, the battery management device can determine the charging current corresponding to the charging period according to the length of the charging period and the battery to be charged in the charging period, so that the charging current can be used in the charging period. The current charges the battery, or determines the discharge current corresponding to the discharge period according to the length of the discharge period and the amount of battery to be discharged in the discharge period, so that the battery can use the discharge current to discharge in the discharge period, which is different from In the prior art, it is necessary to charge the battery according to the set maximum charging current or to discharge the battery according to the maximum discharge current (or the current required by the load), so that the battery can be charged with a smaller charging current. Or control the battery to discharge with a small discharge current to reduce the rapid rise of the temperature of the battery cell.

In a possible implementation manner, the device further includes: a first obtaining unit, configured to obtain an operating current corresponding to a load, wherein the battery supplies power to the load during the discharge period; the first The second determination unit is specifically configured to: obtain the discharge current to be confirmed according to the length of the discharge period and the discharge capacity of the battery; determine the smallest of the discharge current to be confirmed and the operating current as the selected The discharge current corresponding to the discharge period.

In a possible implementation manner, the second parameter information also includes the rated discharge current of the battery; the second determining unit is specifically configured to: according to the duration of the discharge period and the rated discharge current of the battery The amount to be discharged is obtained by obtaining the discharge current to be confirmed; the smallest of the discharge current to be confirmed, the operating current and the rated discharge current is determined as the discharge current corresponding to the discharge period.

In a possible implementation manner, the device further includes: a third determination unit, configured to determine the standby time of the battery based on the remaining charge and the lower limit of the charge corresponding to the battery during the discharge period. discharge capacity.

In a possible implementation manner, the first obtaining unit is specifically configured to: predict based on the historical operating current of the load, and determine the operating current corresponding to the discharging period.

In a possible implementation manner, the device further includes: a fourth determination unit, configured to determine the standby time of the battery based on the remaining charge and the upper limit of the charge corresponding to the battery during the charging period. charging capacity.

In a possible implementation manner, the first parameter information further includes the rated charging current of the battery; the first determining unit is specifically configured to: according to the duration of the charging period and the rated charging current of the battery The amount to be charged is obtained by obtaining the charging current to be confirmed; the smallest of the charging current to be confirmed and the rated charging current is determined as the charging current corresponding to the charging period.

In a possible implementation manner, the electricity price in the charging period is greater than the electricity price in the discharging period.

In the third aspect, the embodiment of the present application provides a lithium battery management system, which is characterized in that it includes: an upper-level management system, used to obtain time-of-use electricity price information, and based on the low electricity price period information and high electricity price information in the time-of-use electricity price information The period information determines the duration of the charging period and the discharging period respectively, and the electricity price of the charging period is greater than the electricity price of the discharging period; the battery management system is used to determine the first parameter information corresponding to the lithium battery in the charging period and In the second parameter information corresponding to the discharge period, the first parameter information includes the amount to be charged, and the second parameter information includes the amount to be discharged; the power monitoring module is configured to, according to the duration of the charging period and the The lithium battery determines the charging current according to the amount to be charged corresponding to the charging period, and charges the lithium battery according to the charging current during the charging period; or according to the duration of the discharging period and the lithium battery The amount to be discharged corresponding to the discharge period determines a discharge current, and controls the lithium battery to discharge according to the discharge current during the discharge period.

In a possible implementation manner, the power monitoring module is specifically configured to obtain the working current of the load, and the lithium battery supplies power to the load during the discharge period; according to the duration of the discharge period and the lithium The to-be-discharged capacity of the battery is obtained from a to-be-confirmed discharge current; and the smallest of the to-be-confirmed discharge current and the operating current is determined as the discharge current corresponding to the discharge period.

In a possible implementation manner, the second parameter information also includes the rated discharge current of the lithium battery; the power monitoring module is specifically configured to A discharge amount is obtained to obtain a discharge current to be confirmed; the minimum of the discharge current to be confirmed, the operating current and the rated discharge current is determined as the discharge current corresponding to the discharge period.

In a possible implementation manner, the first parameter information also includes the rated charging current of the lithium battery; the power monitoring module is specifically configured to The charging amount is obtained by obtaining a charging current to be confirmed; determining the smallest of the charging current to be confirmed and the rated charging current as the charging current corresponding to the charging period.

In the fourth aspect, the embodiment of the present application provides a communication system, which is characterized by including a server, a switching power supply and a smart lithium battery, wherein the server is used to The amount to be charged corresponding to the charging period determines the charging current, and controls the switching power supply to charge the smart lithium battery according to the charging current during the charging period; or according to the length of the discharging period and the time of the smart lithium battery The amount to be discharged corresponding to the discharge period determines the discharge current, and controls the smart lithium battery to discharge according to the discharge current during the discharge period.

In a possible implementation manner, the server, the switching power supply and the smart lithium battery perform signaling interaction based on an Internet protocol IP interface, a controller area network CAN interface or an RS485 interface.

In a possible implementation manner, the communication system further includes a load, and the battery supplies power to the load during the discharge period; the server is specifically configured to: use the switching power supply or the smart lithium battery Obtain the working current of the load; obtain the discharge current to be confirmed according to the duration of the discharge period and the to-be-discharged capacity of the battery; determine the smallest of the discharge current to be confirmed and the working current as the specified The discharge current corresponding to the discharge period.

In a possible implementation manner, the communication system further includes a backup battery; the server is further configured to control the switching power supply to charge the backup battery during the charging period, or control the backup battery to The discharge period performs discharge.

In a fifth aspect, an embodiment of the present application provides a control device, the control device includes a processor configured to support the control device to implement one or more of the battery management methods provided in the first aspect corresponding function. The control device may also include a memory, which is used to be coupled with the processor, and stores necessary program instructions and data of the control device. The control device may also include a communication interface for the control device to communicate with other devices or a communication network.

In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium for storing a processor in a device device for implementing a battery management method provided by one or more of the above-mentioned second aspects Computer software instructions for use in , including programs designed to carry out the aspects described above.

In the seventh aspect, the embodiment of the present application provides a computer program, the computer program includes instructions, and when the computer program is executed by the computer, the computer can execute the process executed by the processor in the control device in the fifth aspect .

In the eighth aspect, the embodiment of the present application provides a chip system, the chip system includes a processor, configured to support the device to implement one or more of the functions involved in the first aspect and the second aspect above, for example, generate Or process the information involved in the above battery management method. In a possible design, the chip system further includes a memory, and the memory is configured to store necessary program instructions and data of the device. The system-on-a-chip may consist of chips, or may include chips and other discrete devices.

Description of drawings

In order to more conveniently describe the technical solution in the embodiment of the present application or the background technology, the following will describe the drawings that need to be used in the embodiment of the present application or the background technology.

FIG. 1 is a schematic diagram of a battery power utilization strategy in the prior art.

FIG. 2 is a schematic diagram of a system architecture applicable to a battery management method provided in an embodiment of the present application.

Fig. 3a is a schematic flowchart of a battery management method provided by an embodiment of the present application.

Fig. 3b is a schematic diagram of a relationship between a charging and discharging period and a charging and discharging current provided in an embodiment of the present application.

Fig. 4a is a schematic flowchart of another battery management method provided by the embodiment of the present application.

Fig. 4b is a schematic diagram of the relationship between a time-of-use electricity price model and charging and discharging current provided in the embodiment of the present application.

Fig. 5 is a schematic structural diagram of a battery management device provided by an embodiment of the present application.

FIG. 6 is a schematic structural diagram of a control device 1000 provided in an embodiment of the present application.

detailed description

The embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

The terms "first", "second", "third" and "fourth" in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order . Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in one or more embodiments of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

The terms "component", "module", "system" and the like are used in this specification to refer to a computer-related entity, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be components. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. A component may, for example, be based on a signal having one or more packets of data (e.g., data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet via a signal interacting with other systems). Communicate through local and/or remote processes.

First of all, some terms used in this application are explained to facilitate the understanding of those skilled in the art.

(1) The battery mainly includes two parts: the battery cell and the protective plate (PCM). The protection board is generally also called the battery management system (Battery Management System, BMS), which mainly includes protection chips (or management chips), MOS tubes, resistors, capacitors and PCB boards, etc.; batteries mainly include positive electrode materials, negative electrode materials, electrolyte , diaphragm and casing, etc. The battery cell is the storage part of the battery, and the quality of the battery cell directly determines the quality of the battery. In actual use, the greater the charging current/discharging current of fast charging and fast discharging, the easier the temperature of the battery cell rises rapidly, which makes the battery life decay faster, affects the number of cycles and the length of the battery life cycle, and cannot realize the battery life. greater value over the lifetime of the In the embodiment of the present application, the charging current/discharging current during the charging/discharging process of the battery can be controlled, so that the battery can be charged to the preset upper limit threshold (generally the rated capacity) with a smaller charging current during the charging period. , while in the discharge period, the energy can be slowly released to the preset lower limit threshold with a small discharge current (generally all energy is discharged), reducing the impact of the battery charging with the maximum charging current or discharging with the maximum discharge current on the temperature rise of the battery cell Impact.

(2) Fast charge and fast discharge, the battery will be quickly charged/discharged according to the maximum charging current/discharging current designed by the system. In areas with time-of-use electricity prices, the battery can be quickly charged according to the maximum charging current designed by the system when the low electricity price starts, and quickly discharged according to the maximum discharge current designed by the system when the high electricity price starts. Fast charge/quick discharge can make the battery store/release energy in the shortest charging time, but the larger the charging current/discharge current of fast charge/quick discharge, the more obvious the temperature rise of the battery cell, and the cycle life of the battery is therefore affected. In the embodiment of the present application, by controlling the charging current/discharging current during the charging/discharging process of the battery, the influence of charging the battery with the maximum charging current or discharging with the maximum discharge current on the temperature rise of the battery cell can be reduced, so as to prolong the battery life. cycle times and lifetime, enabling greater value over the life of the battery.

(3) Depth of Discharge (DOD), generally refers to the discharge depth of the battery. When the battery is fully charged, the DOD value is 0; when the battery is fully discharged, the DOD value is 1. Therefore, under normal circumstances, the DOD of the battery will be a value between 0 and 1, and the sum of the discharge depth DOD of the battery and the charge of the battery is 1.

(4) State of Charge, (State of Charge, SOC), generally refers to the current charge of the battery, and is usually used to reflect the remaining capacity of the battery. Its value can be defined as the ratio of the remaining capacity to the battery capacity, usually expressed as a percentage. The value range of the charging capacity is 0~1. When the SOC is 0, it can indicate that the battery is fully discharged. When the SOC is 1, it indicates that the battery is fully charged. The SOC of a battery can generally be measured by parameters such as battery terminal voltage, charge and discharge current, or internal resistance. The relationship between the depth of discharge and the amount of charge of the battery is: DOD+SOC=1.

(5) In this application, "plurality" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. The character "/" generally indicates that the contextual objects are an "or" relationship.

Firstly, analyze and put forward the technical problem specifically to be solved in this application. In the prior art, the scheme of using batteries for peak-shifting electricity consumption is generally, in areas with time-of-use electricity prices, charge and discharge strategy control is carried out through time-of-use electricity price differences to obtain peak-shift electricity consumption benefits and reduce electricity expenses. Specifically, the user will discharge according to the current or maximum discharge rate required by the load equipment in the high power price range according to the given electricity price table for peak shifting time, and charge at the set maximum charge rate in the low power price range. This realizes peak-staggered electricity consumption, reduces electricity expenses and obtains benefits.

The above scheme has the following disadvantages:

The charging/discharging strategy is fixed, it is difficult to meet the diverse needs, and it affects the long-term profit of the battery. Different time-of-use electricity price regions may have different time-of-use electricity price policies. The specific electricity price and the duration of each electricity price may be different. The fixed charging/discharging strategy cannot be adjusted according to the time-of-use electricity price model, but will The intervals all adopt the same charge/discharge strategy, as can be seen in Figure 1. Figure 1 is a schematic diagram of a battery power consumption strategy in the prior art, wherein, in the interval facing a long period of low electricity price (such as 22:00-08: 00 time period), it will also be charged at the set large rate (for example, 0.5C10). If the battery is in an empty state, it will be charged from 22:00, and it can be fully charged at about 24:00. 24:00-08:00) will not be charged, that is, it may be charged at a fixed maximum charging current (charging rate), which will easily lead to a rapid rise in the temperature of the battery cell, making the life of the battery decay faster, affecting The number of cycles and the length of the battery life cycle will affect the long-term benefits of the battery's off-peak power consumption, and cannot achieve greater value within the battery life cycle. In addition, since the load of the electrical equipment may change, the battery discharges according to the load or is discharged at a fixed maximum discharge rate (for example, 0.5C10), or when the load of the electrical equipment is large, the battery discharges according to the load demand. Discharging with a large current may also cause the temperature of the battery cell to rise rapidly. For example, after the high electricity price is fully discharged within 08:00-10:00, the high electricity price will not be discharged at 10:00-11:00. And after the high electricity price 13:00-15:00 has been discharged quickly, the high electricity price will not be discharged during 15:00-22:00.

In order to solve the problem that the battery with a fixed charging/discharging strategy for off-peak power consumption in the prior art may easily lead to a rapid rise in battery temperature, this application comprehensively considers the shortcomings of the prior art, and the technology to be solved Questions include the following:

Flexible charging and/or discharging strategies. In the embodiment of the present application, when the battery is used for charging/discharging, the rapid rise of the temperature of the battery core can be reduced by controlling the charging current/discharging current during the charging/discharging process of the battery. Specifically, the charging period and the discharging period are respectively corresponding to the low electricity price period and the high electricity price period of the time-of-use electricity price policy. When the low electricity price period is in the low electricity price period, it can be determined according to the duration of the low electricity price period, the amount to be charged and the rated charging current. Smaller charging current, and then use the smaller charging current to charge the battery to the preset upper limit threshold (generally the rated capacity); and in the high electricity price period, according to the duration of the high electricity price period, the amount to be discharged, and the rated discharge current And the load of the electrical equipment determines a small discharge current, and then slowly releases the energy of the battery to the preset lower limit threshold (usually all the energy is discharged) with the small discharge current, ensuring peak-shifting power consumption benefits at the same time , to reduce the impact of charging the battery with a fixed maximum charging current or discharging with a maximum discharge current (or the current required by the load of the electrical equipment) on the temperature rise of the battery core.

To sum up, in the prior art, it is difficult to meet the higher requirements of practical application scenarios by using a battery with a fixed charging/discharging strategy for staggered peak power consumption. Therefore, the battery management method provided in this application is used to solve some or all of the above technical problems.

In order to better understand the battery management method provided in the embodiment of the present application, the system architecture and/or application scenarios applicable to the battery management method provided in the embodiment of the present application will be described below. It can be understood that the scenarios described in the embodiments of the present application are for the purpose of more conveniently explaining the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application.

Refer to FIG. 2, which is a schematic diagram of a system architecture applicable to a battery management method provided in an embodiment of the present application. In the system architecture applicable to the battery management method provided in an embodiment of the application, one or more power supply devices may be included , one or more electric devices, one or more batteries and a controller (or a server), wherein, the power device is used to access the mains to provide electric energy for the electric device and the battery, and the power device and the battery can be connected through Internet protocol (Internet Protocol, IP) interface, controller area network (Controller Area Network, CAN) interface or RS485 interface for signaling control, between the controller and power equipment can be used for signaling through IP interface, CAN interface or RS485 interface Control, signaling control between the controller and the battery through the IP interface, CAN interface or RS485 interface. The battery management method provided by the embodiment of the present application or the related equipment corresponding to the battery management method (such as the controller in Figure 2) can be integrated on the power supply device or the battery, or the related equipment corresponding to the method (such as the controller in Figure 2 ) can also be side-mounted on the system architecture, connected to the power supply device and the battery, and interacted through various signaling, so that the battery management method can realize the control of the charging current and/or discharging current of the battery. Among them, when the power supply and the controller are connected through the IP/CAN/RS485 interface, the power supply can send the load status of the electrical equipment to the controller through the IP/CAN/RS485 interface; when the power supply and the controller are connected When there is no IP/CAN/RS485 interface connection, the controller can monitor the load by controlling the battery to increase the voltage so that the power supply equipment does not supply power to the electrical equipment, or through other load current detection modules (such as BMS, direct current to direct current (DCDC) ), to obtain the load condition of the electrical equipment.

It should be noted that the embodiments of the present application can also be applied to other system architectures, as long as there are entities in the system architecture that can charge batteries, or entities that need battery discharge for power supply, such as communication room scenarios, office building scenarios, and data centers Scenarios and on-board power scenarios of electric vehicles, etc. Taking the communication room scenario as an example, the above-mentioned power supply device may be a switching power supply (such as a site power supply, used for AC to DC (Alternating Current/DirectCurrent, AC/DC)); the above-mentioned power consumption device may be a transmission device, a baseband processing unit (Building Base bandUnite, BBU), radio remote unit (Radio Remote Unit, RRU), data exchange equipment, etc.; the above-mentioned battery can be a smart lithium battery, mainly including batteries and protection boards; in some communication room scenarios, the above-mentioned system The architecture can also include a backup battery, which can be a lead-acid battery as a supplementary means for the smart lithium battery to supply power to the load; in addition, the above system architecture can also include a server, which can be equipped with an upper management system and can be used for various types of The equipment is supervised and controlled or connected to an external system (such as a power grid service system, which is used to publish power supply-related policies).

It can be understood that the system architecture or application scenario in the above figure is only an exemplary implementation in the embodiment of the present application, and the applicable system architecture or scenario of the embodiment of the present application includes but not limited to the above system architecture or scenario.

In order to facilitate the understanding of the battery management method provided in the embodiment of the present application, the following is based on the schematic diagram of the system architecture applicable to the battery management method provided in Figure 2, combined with the battery management method provided in this application, to specifically analyze and solve the technical problems raised in this application .

Please refer to Fig. 3a, Fig. 3a is a schematic flow chart of a battery management method provided by the embodiment of the present application, which can be applied to the system architecture described in Fig. A controller connected to a power supply or a battery can be used to support and execute steps S300-S303 of the method flow shown in FIG. 3a. The method may include the following steps S300-S303.

Step S300: Obtain the duration of the charging period.

Specifically, before determining the charging current, the duration information of the charging period can be obtained first. The charging period is in an area with a time-of-use electricity price, which is generally a low electricity price period in the time-of-use electricity price information. Understandably, the time-of-use electricity price information may include duration information of one or more low electricity price periods, where the duration of each low electricity price period may be the same or different. In addition, in different regions or at different times in the same region (such as different seasons), the electricity price during the low electricity price period can also be different. The low electricity price is generally compared with the high electricity price in the same area, and it is not necessarily lower than a certain amount. A set value is the low electricity price. For example, in city A’s time-of-use electricity price policy, electricity price a (such as 0.5 yuan/kWh) is a low electricity price, while in B city’s time-of-use electricity price policy, electricity price b (such as 0.6 yuan/kWh) is a low electricity price, understandably , the values of a and b may be the same or different, and the values of a and b may change according to time, which is not specifically limited here. Optionally, the time-of-use electricity price information can be set by the user in the above-mentioned controller, or in the setting of the power supply device or battery in the above-mentioned system architecture, or can be obtained by the controller by accessing the power system platform, here Not specifically limited. Understandably, in order to obtain benefits from off-peak electricity consumption, the charging period in the embodiment of the present application may correspond to the low electricity price period in the time-of-use electricity price information, that is to say, the controller may control the battery to charge during the low electricity price period .

Step S301: Determine first parameter information corresponding to the charging period of the battery.

Specifically, before determining the charging current, the first parameter information corresponding to the battery in the charging period can be determined first, and the first parameter information includes the battery to be charged, wherein the to-be-charged quantity corresponding to each charging period can be based on each The remaining charge of the battery corresponding to the charging period and the preset upper limit of the charge are determined. The remaining charge of the battery can be calculated based on parameters such as battery terminal voltage, charge and discharge current, or internal resistance; the preset upper limit of the charge can be set by the user according to the battery life cycle. Generally, the upper limit of the charge can be set as the rated capacity. It can also be set to 80% of the rated capacity, or can also be set to other values by the user according to the actual situation, which is not specifically limited here. The amount to be charged can be obtained by calculating the difference between the preset upper limit of the charge amount and the remaining charge amount of the battery.

Step S302: Determine the charging current corresponding to the charging period according to the duration of the charging period and the to-be-charged amount of the battery.

Specifically, in the process of determining the charging current corresponding to the charging period, the above-mentioned controller can determine the charging current of the charging period according to the length of the charging period and the amount of battery to be charged, so as to ensure that the charging current of the battery is satisfied within the charging period as much as possible. required charging capacity. Please refer to Figure 3b, which is a schematic diagram of the relationship between the charge and discharge period and the charge and discharge current provided by the embodiment of the present application. Hours, assuming that the amount to be charged is 100Ah, the charging current corresponding to this charging period can be determined to be about 10A after calculation (or 0.1C10, which means the charging rate, which is the ratio of the charging current to the rated capacity of the battery); while the charging period 2 is 11 :00-13:00, the duration is 2 hours, assuming that the discharge period 1 completely discharges the power of the charging period 1, and the charging capacity of the charging period 2 is also 100Ah, then the charging current corresponding to the charging period can be determined by calculation It is about 50A (or 0.5C10). Understandably, the duration of the charging period, the amount to be charged, and the rated capacity of the battery are only examples for the convenience of understanding the embodiment of the application. The specific values can also be other values. This is not specifically limited.

In a possible implementation manner, the above-mentioned first parameter information may also include the rated charging current of the battery, and the rated charging current is generally the maximum charging current value (for example, 100A) that the battery can withstand when charging, and the above-mentioned controller can according to The duration of the charging period and the amount of battery to be charged are determined to obtain the charging current to be confirmed, and then the charging current to be confirmed is compared with the rated charging current of the battery, and the smallest of the two is determined as the charging current of the charging period, that is, That is to say, when the charging current to be confirmed based on the length of the charging period and the amount to be charged is less than the rated charging current of the battery, the charging current to be confirmed is determined as the charging current corresponding to the charging period, for example, the charging current to be confirmed It is estimated to be 12.5A, and the rated charging current is 100A; if the charging current to be confirmed is greater than or equal to the rated charging current of the battery, for example, the charging period may be short and the charging capacity is large, the charging current to be confirmed It is estimated to be 125A, and the rated charging current is 100A, then the rated charging current of the battery is determined as the charging current corresponding to the charging period, so as to prevent the charging current from exceeding the maximum charging current value that the battery can withstand and damage the battery. Understandably, the above-mentioned values of the charging current to be confirmed and the rated charging current of the battery are examples for the convenience of describing the embodiments of the present application, and may also take other values, which are not specifically limited here.

Step S303: During the charging period, charge the battery with the charging current.

Specifically, during the charging period, the battery is charged according to the above-mentioned charging current. Understandably, the charging period may correspond to the low electricity price period in the time-of-use electricity price information. After the above-mentioned controller determines the charging current based on the length of the charging period and the amount of battery to be charged, it can follow the charging current within the charging period as The battery is charged, and the electricity in the low electricity price period is stored, as far as possible to ensure that the charging amount required by the battery is met during the charging period, and then the electricity is recharged in other periods when electricity is needed (such as a high electricity price period). release, so as to obtain the benefits of shifting peak power consumption.

In a possible implementation manner, in addition to the above steps S300-S303, the method may further include the following steps S304-S307:

Step S304: Obtain the duration of the discharge period.

Specifically, before determining the discharge current, the duration information of the discharge period can be obtained first. Generally, in order to obtain the benefits of off-peak electricity consumption, the electricity price corresponding to the discharge period is generally greater than the electricity price during the charge period. Understandably, there are The time-of-use electricity price area, the time-of-use electricity price information may not only include the duration information of one or more low electricity price periods, but also include the duration information of one or more high electricity price periods, where the electricity value of the high electricity price period is greater than that of the low electricity price period. The electricity value during the electricity price period, and the duration of each high electricity price period can be the same or different. In different regions, the electricity price during the high electricity price period may also be different. For details, please refer to the relevant description of the above low electricity price period, which will not be repeated here. In order to obtain the benefit of shifting peak electricity consumption, the discharge period can correspond to the high electricity price period in the time-of-use electricity price information, and the controller can control the battery to release the energy stored in the low electricity price period Discharging during the electricity price period provides part or all of the electric energy for the electric equipment.

Step S305: Determine the second parameter information corresponding to the battery in the discharge period.

Specifically, before determining the discharge current, the second parameter information corresponding to the battery in the discharge period may be determined first, and the second parameter information may include the battery's to-be-discharged capacity, wherein the to-be-discharged capacity corresponding to each discharge period may be based on each The remaining charge of the battery corresponding to each discharge period and the preset lower limit of the charge are determined. The calculation of the remaining charge of the battery can refer to the relevant description of step S301, and will not be repeated here; the preset lower limit of the charge can be set by the user according to the service cycle of the battery. Generally, the lower limit of the charge can be set to 0 (that is, the battery can emptying the electricity) can also be set to 10% of the rated capacity, or can also be set to other values by the user according to the actual situation, which is not specifically limited here. The capacity to be discharged can be obtained by calculating the difference between the remaining charge of the battery and the preset lower limit of the charge.

Step S306: Determine the discharge current corresponding to the discharge period according to the duration of the discharge period and the to-be-discharged capacity of the battery.

Specifically, in the process of determining the discharge current corresponding to the discharge period, the above-mentioned controller can determine the discharge current of the discharge period according to the length of the discharge period and the battery's to-be-discharged capacity, so as to ensure that the battery is discharged within the discharge period as much as possible. The power to be discharged is exhausted. See Figure 3b above, which includes 2 discharge periods, discharge period 1 is 08:00-11:00, its duration is 3 hours, and the discharge capacity is 100Ah, then the discharge current corresponding to this discharge period can be determined by calculation It is about 35A (or 0.35C10, indicating the discharge rate, which is the ratio of the discharge current to the rated capacity of the battery); while the discharge period 2 is 13:00-22:00, and its duration is 9 hours, assuming that the charge period 2 will be the same as the discharge period 1 When the discharged electricity is fully charged, and the discharge capacity of the discharge period 2 is also 100Ah, the discharge current corresponding to the discharge period can be determined to be about 12A (or 0.12C10) after calculation. Understandably, the duration of the above discharge period and the waiting time The discharge amount is only an example for the convenience of understanding the embodiment of the present application, and the specific value may also be other values, which are not specifically limited here.

In a possible implementation, before determining the discharge current corresponding to the discharge period, the operating current corresponding to the load (such as the electric device in Figure 2) can also be obtained first, wherein the battery can discharge to the load during the discharge period. power supply; then, when determining the discharge current corresponding to the discharge period, the length of the discharge period, the battery’s to-be-discharged capacity, and the operating current corresponding to the load can be combined. Discharge amount, determine the discharge current to be confirmed, and then compare the discharge current to be confirmed with the operating current of the load, and determine the smallest of the two as the discharge current of the discharge period, that is, when based on the length of the discharge period When the discharge current to be confirmed and the discharge amount to be confirmed is less than the operating current of the load, the discharge current to be confirmed is determined as the discharge current corresponding to the discharge period. For example, the discharge current to be confirmed is estimated to be 40A, and the operating current of the load is 60A , understandably, at this time, the discharge current of the battery during the discharge period cannot maintain the normal operation of the load, and a part of the mains power can be introduced as a supplement to the discharge current; if the discharge current to be confirmed is greater than or equal to the operating current of the load, for example, it may The duration of the discharge period is relatively short, and the amount to be discharged is large, and the discharge current to be confirmed is estimated to be 80A, and the operating current of the load is 60A, then the operating current of the load is determined as the discharge current corresponding to the discharge period to prevent discharge If the current exceeds the current value required by the load, the power will be wasted due to over-discharge. Understandably, the above-mentioned values of the discharge current to be confirmed and the operating current of the load are examples for the convenience of describing the embodiments of the present application, and may also take other values, which are not specifically limited here.

Optionally, the operating current corresponding to the load is obtained, and prediction can be made based on the historical operating current data of the load, so as to determine the operating current corresponding to the load during the discharge period. For example, the historical operating current data of the load can be obtained by the power supply device in FIG. 2 The power monitoring module monitors and collects data. When the controller needs to predict the working current of the load during the discharge period, it can first obtain the historical working current data of the load through the CAN interface or the RS485 interface, and then according to the current load corresponding The operating current corresponding to the current moment in the historical operating current data of the load compared to the same period (or ring ratio), and then predict the operating current corresponding to the load in the above discharge period.

In a possible implementation manner, the above-mentioned second parameter information may also include the rated discharge current of the battery, and the rated discharge current is generally the maximum discharge current value (for example, 100A) that the battery can withstand when discharging. The duration of the time period and the amount of battery to be discharged are determined to obtain the discharge current to be confirmed, and before the discharge current corresponding to the discharge period is determined, the operating current corresponding to the load (such as the electrical device in Figure 2) can be obtained first, wherein the battery It is possible to discharge power to the load during the discharge period; then, compare the discharge current to be confirmed, the rated discharge current of the battery, and the operating current of the load, and determine the smallest of the three as the discharge current during the discharge period. That is to say, when the discharge current to be confirmed obtained based on the length of the discharge period and the amount to be discharged is less than the operating current of the load and less than the rated discharge current of the battery, the discharge current to be confirmed is determined as the discharge current corresponding to the discharge period. Discharge current, for example, the discharge current to be confirmed is estimated to be 40A, the operating current of the load is 60A, and the rated discharge current is 100A. Understandably, the discharge current of the battery during the discharge period cannot maintain the normal operation of the load. The mains power is used as a supplement to the discharge current; if the discharge current to be confirmed is greater than or equal to the operating current of the load, and the operating current of the load is less than or equal to the rated current of the battery, for example, the duration of the discharge period may be short, and the amount to be discharged When it is larger, the discharge current to be confirmed is estimated to be 80A, the operating current of the load is 60A, and the rated discharge current is 100A, then the operating current of the load is determined as the discharge current corresponding to the discharge period to prevent the discharge current from exceeding the working demand of the load Current value, if there is a waste of electricity due to over-discharge; if the discharge current to be confirmed and the operating current of the load are both greater than or equal to the rated discharge current of the battery, the rated discharge current of the battery is determined as the discharge current corresponding to the discharge period. Prevent the discharge current from exceeding the maximum discharge current value that the battery can withstand and damage the battery. Understandably, the above-mentioned values of the discharge current to be confirmed and the operating current of the load are examples for the convenience of describing the embodiments of the present application, and may also take other values, which are not specifically limited here.

Optionally, when comparing the discharge current to be confirmed, the rated discharge current of the battery, and the operating current of the load, if the discharge current to be confirmed is less than the operating current of the load, and the operating current of the load is less than the rated discharge current of the battery, you can also The working current of the load is determined as the discharge current of the battery during the discharge period, that is, when the battery is discharged according to the working current of the load without obvious heat generation, it can also be discharged according to the working current.

Step S307: During the discharge period, control the battery to discharge at the discharge current.

Specifically, during the discharge period, the battery is controlled to discharge according to the above discharge current. Understandably, the discharge period may correspond to the high electricity price period in the time-of-use electricity price information. After the controller determines the discharge current based on the duration of the discharge period and the battery’s to-be-discharged capacity, it can control the battery to discharge according to the discharge current within the discharge period. The electric current is discharged, and the electricity stored in the low electricity price period is fully released in the discharge period (such as the high electricity price period) as much as possible, so as to obtain the benefits of staggered peak power consumption.

It should be noted that the above-mentioned battery management method firstly adjusts the charging current during the charging period of the battery, which is different from the prior art that performs fast charging according to the set maximum charging current during the charging process, which may easily lead to a rapid rise in the temperature of the battery cells. , affecting the cycle life of the battery, the embodiment of the present application can adjust the charging current according to the length of the charging period and the amount of battery to be charged, rather than fixedly charging according to the set maximum charging current, which can realize charging within the charging period with a small The charging current of the battery is charged, which can effectively reduce the situation that the battery cell temperature rises rapidly due to high-current charging, and prolong the battery life; then, the embodiment of the present application can adjust the charging current on the basis of adjusting The discharge current of the battery during the discharge period is adjusted, which is different from the prior art that discharges rapidly according to the set maximum discharge current or the working current of the load during the discharge process, which may easily lead to rapid cell temperature. The increase will affect the cycle life of the battery. On the basis of controlling the charging current, the discharge current is controlled to further reduce the rapid rise of the battery temperature and further extend the battery life.

It should be noted that the control of the discharge current during the discharge period can also be used as a basis for reducing the rapid temperature rise of the battery cell. Please refer to FIG. 4a, which is a schematic flow chart of another battery management method provided by the embodiment of the present application. This method can be applied to the system architecture described in FIG. Or a controller connected to a power supply device or a battery may be used to support and execute steps S400-S403 of the method flow shown in FIG. 4a. The method may include the following steps S400-step S403.

Step S400: Obtain the duration of the discharge period.

Step S401: Determine the second parameter information corresponding to the battery in the discharge period.

Step S402: Determine the discharge current corresponding to the discharge period according to the duration of the discharge period and the to-be-discharged capacity of the battery.

Step S403: During the discharge period, control the battery to discharge at the discharge current.

Specifically, for the description of the above step S400-step S403, reference may be made to the relevant description in step S304-step S307, which will not be repeated here.

In a possible implementation manner, in addition to the above steps S400-S403, the method may further include the following steps S404-S407:

Step S404: Obtain the duration of the charging period.

Step S405: Determine the first parameter information corresponding to the charging period of the battery.

Step S406: Determine the charging current corresponding to the charging period according to the duration of the charging period and the to-be-charged amount of the battery.

Step S407: During the charging period, charge the battery with the charging current.

Specifically, for the description of the above step S404-step S407, reference may be made to the related description in step S300-step S303, which will not be repeated here. Understandably, the embodiment of the present application can reduce the damage to the battery caused by high-current charging or high-current discharge and prolong the battery life to a certain extent by only controlling the charging current during the charging period, or only by controlling the discharging current during the discharging period. It is also possible to combine charge current control and discharge current control to further reduce the damage to the battery caused by high current charge and discharge, thereby making the battery life longer.

It should be noted that, in a possible implementation manner, the above-mentioned methods in FIG. 3a and FIG. 4a can also be implemented by a software system (ie, a lithium battery management system), which can include an upper management system, a battery management system, and a battery management system. System and power supply monitoring module, wherein the upper management system can be installed in the controller (or server) in Figure 2 to obtain time-of-use electricity price information, and based on the low electricity price period information and high electricity price period information in the time-of-use electricity price information Determine the duration of the charging period and the discharging period respectively, and the electricity price of the charging period is greater than the electricity price of the discharging period; the battery management system can be installed in the battery shown in Figure 2 (the battery is a lithium battery at this time) to determine the lithium battery in The first parameter information corresponding to the charging period and the second parameter information corresponding to the discharging period, the first parameter information includes the amount to be charged, and the second parameter information includes the amount to be discharged; the power monitoring module can be set in the In the power supply device, it is used to determine the charging current according to the length of the charging period and the amount to be charged corresponding to the lithium battery during the charging period, and charge the lithium battery according to the charging current during the charging period; or according to the discharge The duration of the period and the amount to be discharged corresponding to the lithium battery in the discharge period determine the discharge current, and the lithium battery is controlled to discharge according to the discharge current in the discharge period. Each system and module can establish a communication connection through the physical interface of the corresponding device to realize signaling interaction, so as to realize the above-mentioned methods in FIG. 3a and FIG. 4a. Understandably, the above-mentioned upper management system, battery management system and power monitoring module can also be integrated in the same device (such as the controller in Figure 2, or server, power device, battery), and then the device controls the power device according to the determined The charging current is used to charge the battery, or the battery is controlled to discharge according to the determined discharging current.

Based on the method in Figure 3a or Figure 4a above, during the process of charging and/or discharging the battery, the charging current and/or discharging current can be adjusted, which is different from the charging process in the prior art according to the set maximum charging current Charging, and discharging according to the set maximum discharge current or the working current of the load during the discharge process, the embodiment of the present application can use a small charging current for charging during the charging process, reducing the impact of high current fast charging on the battery The influence of temperature; during the discharge process, a small discharge current can also be used to discharge, reducing the impact of large current and rapid discharge on the battery temperature, so that the cycle times and life of the battery can be extended while ensuring the peak-staggered income. Greater value over battery lifetime.

It should also be noted that, in order to obtain the benefit of shifting peak electricity consumption, the battery charging period in the above method generally corresponds to the low electricity price period in the time-of-use electricity price information, and the battery discharge period generally corresponds to the time-of-use electricity price period in the time-of-use electricity price information. High electricity price period. In some time-of-use electricity price models, there may also be peak electricity price periods, that is to say, the electricity price during the low electricity price period is lower than the electricity price during the high electricity price period, and the electricity price during the high electricity price period is lower than the electricity price during the peak electricity price period. In this case, in the above method, the discharge period of the battery can be preferentially corresponding to the peak electricity price period, and when the demand for peak electricity price is met and there is enough remaining charge, it can continue to discharge during the high electricity price period, so as to The benefits of increasing peak-shift electricity consumption can be seen in Figure 4b, which is a schematic diagram of the relationship between a time-of-use electricity price model and charging and discharging current provided by the embodiment of the present application, which can include 2 low electricity price periods and 2 high electricity price periods and 1 peak electricity price period, wherein, the peak electricity price period is 19:00-22:00, and its duration is 3 hours, and the discharge period can be preferentially corresponding to the peak electricity price period in the time-of-use electricity price information, that is, the control battery is given priority in the peak electricity price period Discharge, if there is still a margin, continue to discharge during high electricity price periods. Understandably, if there is a valley electricity price period in the time-of-use electricity price model, and the electricity price in the valley electricity price period is lower than the electricity price in the low electricity price period, the charging period in the above method can be preferentially corresponding to the valley electricity price period. When there is a demand for electricity, it can also continue to charge during low electricity price periods.

To sum up, when the battery management method provided by the present application is applied to battery charging and/or discharging management, it can solve the problems of rapid battery cell temperature rise and rapid battery life decay existing in traditional solutions. Therefore, the present application overcomes the shortcomings in the prior art, by adjusting the charging current or discharging current during the charging process or discharging process of the battery, avoiding fixedly charging with the set maximum charging current, or fixedly charging with the maximum discharge current Current (or the working current required by the load) is discharged, and a small charging current and/or discharging current can be used for charging and/or discharging, thereby reducing the rapid rise of battery cell temperature and prolonging the number of cycles and life of the battery , so as to achieve greater value in the battery life cycle; in addition, in areas with time-of-use electricity prices, this method can also be combined with time-of-use electricity price policies to ensure the benefits of off-peak electricity consumption. It is understandable that the battery management method provided by the embodiment of the present application can also be used in an area without a time-of-use electricity price policy to control the charging current/discharging current during the charging and discharging process of the battery to prolong the battery life.

The method in the embodiment of the present application has been described in detail above, and the related devices provided in the embodiment of the present application will be described below.

Please refer to FIG. 5. FIG. 5 is a schematic structural diagram of a battery management device provided in an embodiment of the present application. The battery management device 5 may include a control module 501, a first determining unit 502, and a second determining unit 503, and may also include The first obtaining unit 504, the third determining unit 505 and the fourth determining unit 506, wherein the detailed description of each unit is as follows:

The control module 501 is used to determine the charging current and perform charging according to the charging current; or to determine the discharging current and perform discharging according to the discharging current;

Wherein, the control module 501 includes:

The first determining unit 502 is configured to determine the charging current corresponding to the charging period according to the duration of the charging period and first parameter information corresponding to the battery during the charging period; the first parameter information includes the chargeable capacity of the battery;

The second determination unit 503 is configured to determine the discharge current corresponding to the discharge period according to the duration of the discharge period and the second parameter information corresponding to the battery in the discharge period; the second parameter information includes The battery's capacity to be discharged.

In a possible implementation manner, the device further includes:

The first obtaining unit 504 is configured to obtain the working current corresponding to the load, wherein the battery supplies power to the load during the discharge period;

The second determining unit 503 is specifically configured to: obtain a discharge current to be confirmed according to the duration of the discharge period and the amount to be discharged of the battery; set the minimum of the discharge current to be confirmed and the operating current is determined as the discharge current corresponding to the discharge period.

In a possible implementation manner, the second parameter information also includes a rated discharge current of the battery;

The second determining unit 503 is specifically configured to:

Obtain a discharge current to be confirmed according to the duration of the discharge period and the to-be-discharged capacity of the battery;

The smallest of the discharge current to be confirmed, the working current, and the rated discharge current is determined as the discharge current corresponding to the discharge period.

In a possible implementation manner, the device further includes:

The third determination unit 505 is configured to determine the to-be-discharged capacity of the battery based on the remaining charge amount and the lower limit of the charge amount corresponding to the battery in the discharge period.

In a possible implementation manner, the first acquiring unit 504 is specifically configured to:

Prediction is performed based on the historical operating current of the load, and the operating current corresponding to the discharging period is determined.

In a possible implementation manner, the device further includes:

The fourth determining unit 506 is configured to determine the to-be-charged amount of the battery based on the remaining charge amount and the upper limit of the charge amount corresponding to the charging period of the battery.

In a possible implementation manner, the first parameter information also includes a rated charging current of the battery;

The first determining unit 502 is specifically configured to:

Obtain a charging current to be confirmed according to the length of the charging period and the charging capacity of the battery;

The smallest of the charging current to be confirmed and the rated charging current is determined as the charging current corresponding to the charging period.

In a possible implementation manner, the electricity price in the charging period is greater than the electricity price in the discharging period.

It should be noted that, the function of each functional unit in the battery management device 5 described in the embodiment of the present application may refer to the relevant description in the above method embodiment, and will not be repeated here.

As a possible product form, the controller described in the embodiment of the present application may be implemented by a general bus architecture.

For ease of description, refer to FIG. 6 , which is a schematic structural diagram of a control device 1000 provided in an embodiment of the present application. The control device 1000 may be a controller, or a chip therein. FIG. 6 shows only the main components of the control device 1000 . In addition to the processor 1001 and the transceiver 1002, the control device may further include a memory 1003 and an input and output device (not shown in FIG. 6 ).

The processor 1001 is mainly used to process communication protocols and communication data, control the entire control device, execute software programs, and process data of the software programs. The memory 1003 is mainly used to store software programs and data. The transceiver 1002 may include a control circuit and an antenna, and the control circuit is mainly used for converting a baseband signal to a radio frequency signal and processing the radio frequency signal. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.

When the control device is turned on, the processor 1001 can read the software program in the memory 1003, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 1001 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signal, and sends the radio frequency signal through the antenna in the form of electromagnetic waves. When data is sent to the control device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1001, and the processor 1001 converts the baseband signal into data and processes the data deal with.

In another implementation, the radio frequency circuit and antenna can be set independently from the processor for baseband processing. For example, in a distributed scenario, the radio frequency circuit and antenna can be arranged remotely from the control device. .

Wherein, the processor 1001, the transceiver 1002, and the memory 1003 may be connected through a communication bus.

In one design, the control device 1000 can be used to execute the functions of the battery management method in the foregoing method embodiments: the processor 1001 can be used to generate various messages sent by each step in FIG. 3a or FIG. 4a, and/or used to Perform other processes of the techniques described herein; the transceiver 1002 may be used to send and receive messages for the various steps in Figure 3a or Figure 4a, and/or for other processes of the techniques described herein.

In any of the above designs, the processor 1001 may include a transceiver for implementing receiving and sending functions. For example, the transceiver may be a transceiver circuit, or an interface, or an interface circuit. The transceiver circuits, interfaces or interface circuits for realizing the functions of receiving and sending can be separated or integrated together. The above-mentioned transceiver circuit, interface or interface circuit may be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface or interface circuit may be used for signal transmission or transmission.

In any of the above designs, the processor 1001 may store instructions, the instructions may be computer programs, and the computer programs run on the processor 1001 to enable the control device 1000 to execute the methods described in any of the above method embodiments. The computer program may be fixed in the processor 1001, and in this case, the processor 1001 may be implemented by hardware.

In an implementation manner, the control device 1000 may include a circuit, and the circuit may implement the function of sending or receiving or communicating in the foregoing method embodiments. The processors and transceivers described in this application can be implemented in integrated circuits (integrated circuits, ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application specific integrated circuits (ASICs), printed circuit boards ( printed circuitboard, PCB), electronic equipment, etc. The processor and transceiver can also be fabricated using various IC process technologies such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), p-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The scope of the control device described in this application is not limited thereto, and the structure of the control device may not be limited by FIG. 6 . The control device may be a stand-alone device or may be part of a larger device. For example the control means may be:

(1) Stand-alone integrated circuits ICs, or chips, or chip systems or subsystems;

(2) A set of one or more ICs, optionally, the set of ICs may also include storage components for storing data and computer programs;

(3) ASIC, such as modem (Modem);

(4) Modules that can be embedded in other devices;

(5) Receivers, terminals, smart terminals, cellular phones, wireless devices, handsets, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

(6) Others and so on.

As a possible product form, the controller described in the embodiment of the present application may be implemented by a general-purpose processor.

The general-purpose processor realizing the function of the battery management method includes a processing circuit and an input-output interface connected and communicated with the processing circuit.

In one design, the general-purpose processor can be used to execute the functions of the battery management method in the foregoing method embodiments: the processing circuit can be used to generate various messages sent by each step in FIG. 3a or FIG. 4a, and/or for Perform other processes of the technology described herein; the input-output interface may be used to send and receive messages of the steps in FIG. 3a or 4a, and/or for other processes of the technology described herein.

It should be understood that the above-mentioned control devices in various product forms have any function of the battery management method in the above-mentioned method embodiments, which will not be repeated here.

The embodiment of the present application also provides a computer-readable storage medium, where computer program code is stored, and when the above-mentioned processor executes the computer program code, the electronic device executes the method in any one of the above-mentioned embodiments.

The embodiment of the present application also provides a communication device, which can exist in the product form of a chip. The structure of the device includes a processor and an interface circuit. The processor is used to communicate with other devices through a receiving circuit, so that the device performs the aforementioned The method in any of the examples.

An embodiment of the present application further provides a computer program product, which, when the computer program product is run on a computer, causes the computer to execute the method in any one of the foregoing embodiments.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

It should be noted that for the foregoing method embodiments, for the sake of simple description, they are expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence. Depending on the application, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by this application.

In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the above units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components can be combined or integrated. to another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical or other forms.

The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present application.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the above integrated units are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, server or network device, etc., specifically, a processor in the computer device) execute all or part of the steps of the above-mentioned methods in various embodiments of the present application. Wherein, the aforementioned storage medium may include: U disk, mobile hard disk, magnetic disk, optical disk, read-only memory (Read-OnlyMemory, abbreviated: ROM) or random access memory (RandomAccessMemory, abbreviated: RAM), etc. medium for program code.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions described in each embodiment are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the application.

Claims (19)

1. A battery management method, comprising:

determining a charging current, and charging the battery according to the charging current in a charging period; or determining a discharge current and controlling the battery to discharge according to the discharge current in a discharge period;

wherein,

the determining a charging current comprises:

determining the charging current corresponding to the charging time period according to the duration of the charging time period and first parameter information corresponding to the charging time period of the battery; the first parameter information includes a to-be-charged amount of the battery;

the determining of the discharge current comprises:

determining the discharge current corresponding to the discharge time period according to the duration of the discharge time period and second parameter information corresponding to the discharge time period of the battery; the second parameter information includes a to-be-discharged amount of the battery.

2. The method of claim 1, further comprising:

obtaining working current corresponding to a load, wherein the battery supplies power to the load in the discharging period;

the determining of the discharge current comprises:

obtaining discharge current to be confirmed according to the discharge time period duration and the discharge amount to be discharged of the battery;

and determining the minimum of the discharge current to be confirmed and the working current as the discharge current corresponding to the discharge time period.

3. The method of claim 2, wherein the second parameter information further includes a rated discharge current of the battery;

the determining of the discharge current comprises:

obtaining discharge current to be confirmed according to the discharge time period and the discharge amount of the battery;

and determining the minimum of the discharge current to be confirmed, the working current and the rated discharge current as the discharge current corresponding to the discharge time period.

4. The method of any one of claims 1-3, further comprising:

and determining the amount of the battery to be discharged based on the residual charge amount and the charge amount lower limit corresponding to the discharge time period of the battery.

5. The method according to any one of claims 2-3, wherein the obtaining the operating current corresponding to the load comprises:

and predicting based on the historical working current of the load, and determining the working current corresponding to the discharging period.

6. The method of any one of claims 1-5, further comprising:

and determining the amount to be charged of the battery based on the residual charge amount and the upper charge amount limit corresponding to the charging period of the battery.

7. The method of any one of claims 1-6, wherein the first parameter information further includes a rated charging current of the battery;

the determining a charging current comprises:

obtaining charging current to be confirmed according to the duration of the charging time period and the amount of the battery to be charged;

and determining the minimum of the charging current to be confirmed and the rated charging current as the charging current corresponding to the charging period.

8. The method of any one of claims 1-7, wherein the electricity prices for the charging period are greater than the electricity prices for the discharging period.

9. A lithium battery management system, comprising:

the upper management system is used for acquiring time-of-use electricity price information and respectively determining the duration of a charging period and the duration of a discharging period on the basis of low-electricity price period information and high-electricity price period information in the time-of-use electricity price information, wherein the electricity price of the charging period is greater than that of the discharging period;

the battery management system is used for determining first parameter information corresponding to the lithium battery in the charging time period and second parameter information corresponding to the discharging time period, the first parameter information comprises a to-be-charged amount, and the second parameter information comprises a to-be-discharged amount;

the power supply monitoring module is used for determining a charging current according to the duration of the charging time period and the amount of the lithium battery to be charged corresponding to the charging time period, and charging the lithium battery according to the charging current in the charging time period; or determining a discharge current according to the duration of the discharge time period and the amount to be discharged corresponding to the discharge time period of the lithium battery, and controlling the lithium battery to discharge according to the discharge current in the discharge time period.

10. The communication system of claim 9, wherein the power monitoring module is specifically configured to:

obtaining the working current of a load, wherein the lithium battery supplies power to the load in the discharging period;

obtaining discharge current to be confirmed according to the duration of the discharge time period and the amount of the lithium battery to be discharged;

and determining the minimum of the discharge current to be confirmed and the working current as the discharge current corresponding to the discharge time period.

11. The communication system according to claim 10, wherein the second parameter information further includes a rated discharge current of the lithium battery;

the power supply monitoring module is specifically used for obtaining a discharge current to be confirmed according to the discharge time period duration and the discharge amount to be detected of the lithium battery;

and determining the minimum of the discharge current to be confirmed, the working current and the rated discharge current as the discharge current corresponding to the discharge time period.

12. The communication system according to any one of claims 9 to 10, wherein the first parameter information further includes a rated charging current of the lithium battery;

the power supply monitoring module is specifically used for obtaining charging current to be confirmed according to the duration of the charging period and the amount to be charged of the lithium battery;

and determining the minimum of the charging current to be confirmed and the rated charging current as the charging current corresponding to the charging period.

13. The communication system is characterized by comprising a server, a switching power supply and an intelligent lithium battery, wherein the server is used for determining a charging current according to the duration of a charging time period and the amount of charge to be charged of the intelligent lithium battery corresponding to the charging time period, and controlling the switching power supply to charge the intelligent lithium battery according to the charging current in the charging time period; or determining the discharge current according to the duration of the discharge time period and the amount of the intelligent lithium battery to be discharged in the discharge time period, and controlling the intelligent lithium battery to discharge in the discharge time period according to the discharge current.

14. The communication system of claim 13, wherein the server, the switching power supply and the smart lithium battery are in signaling interaction based on an Internet Protocol (IP) interface, a Controller Area Network (CAN) interface or an RS485 interface.

15. The communication system of claim 14, further comprising a load, the battery powering the load during the discharge period;

the server is specifically configured to:

acquiring the working current of the load through the switching power supply or the intelligent lithium battery;

obtaining discharge current to be confirmed according to the discharge time period duration and the discharge amount to be discharged of the battery;

and determining the minimum of the discharge current to be confirmed and the working current as the discharge current corresponding to the discharge time period.

16. The communication system according to any of claims 14-15, wherein the communication system further comprises backup power; the server is also used for controlling the switching power supply to charge the standby battery in the charging time interval or controlling the standby battery to discharge in the discharging time interval.

17. A control apparatus comprising a processor and a memory, wherein the memory is configured to store program code, which when executed by the processor, causes the electronic device to implement the method of any of claims 1-8.

18. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-8.

19. A computer program, characterized in that the computer program comprises instructions which, when executed by a computer, cause the computer to carry out the method according to any one of claims 1-8.

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