CN115675442B

CN115675442B - Power battery temperature correction method, device, equipment and storage medium

Info

Publication number: CN115675442B
Application number: CN202211346561.8A
Authority: CN
Inventors: 李俊
Original assignee: Zhejiang Geely Holding Group Co Ltd; Radar New Energy Vehicle Zhejiang Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Radar New Energy Vehicle Zhejiang Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2025-08-22
Anticipated expiration: 2042-10-31
Also published as: CN115675442A

Abstract

The application provides a temperature correction method, device and equipment of a power battery and a storage medium, relates to the technical field of battery optimization control, and aims to correct the temperature of a battery cell output by a temperature sensor so that the temperature is closer to the temperature of a real battery cell, and the running safety of a vehicle is ensured. The method comprises the steps of determining that a current scene meets the condition of a correction scene of a power battery according to the running parameters of a hybrid electric vehicle, determining that the current scene meets the condition of correction starting of the first battery module according to the first cell temperature of the first battery module and the second cell temperature of the second battery module except for the first battery module, which are output by a temperature sensor, wherein the degree of influence of engine heat radiation is larger than a preset threshold, determining a temperature correction reference value of the first battery module according to the second cell temperature after correction starting, determining a temperature correction target value of the first battery module according to the first cell temperature, and correcting the first cell temperature output by the temperature sensor according to the determined temperature correction target value.

Description

Temperature correction method, device and equipment for power battery and storage medium

Technical Field

The application relates to the technical field of battery optimization control, in particular to a temperature correction method, device and equipment for a power battery and a storage medium.

Background

The hybrid electric vehicle is a novel vehicle powered by the cooperation of the gasoline engine and the power Battery, compared with the traditional internal combustion engine vehicle, the energy utilization rate is higher, the hybrid electric vehicle is more environment-friendly, compared with a pure electric vehicle (Battery ELECTRIC VEHICLE, BEV), the endurance of the vehicle is stronger, and the application range is wider.

Due to the limited interior space of the vehicle, the engine exhaust pipe of a hybrid vehicle is typically disposed around the power cell. When the engine of the hybrid electric vehicle runs, high-temperature waste heat generated by the engine needs to be discharged through the exhaust pipe, when the engine runs at high power under the high-temperature environment and the speed of the vehicle is low, high-temperature radiation of the exhaust pipe cannot be taken away by flowing air in time, and the power battery module adjacent to the exhaust pipe is greatly influenced by the fact that the temperature of the copper harrow or the aluminum harrow on the battery core pole is interfered by heat radiation, and compared with the battery core body, the temperature of the copper harrow or the aluminum harrow is more interfered by heat radiation, so that the temperature of the copper harrow or the aluminum harrow acquired by the temperature sensor does not accurately reflect the actual temperature of the battery core of the power battery module, the battery thermal management strategy of the vehicle cannot run normally, and the running safety of the vehicle is greatly influenced.

Disclosure of Invention

In view of the above problems, embodiments of the present application provide a method, an apparatus, a device, and a storage medium for correcting a temperature of a battery cell output by a temperature sensor, so that the temperature of the battery cell is closer to a real battery cell temperature, thereby facilitating normal battery thermal management of an automobile and ensuring running safety of the automobile.

In one aspect, a temperature correction method of a power battery is provided, and the temperature correction method is applied to a hybrid vehicle, wherein the hybrid vehicle comprises a power battery and an engine, the power battery comprises a first type of battery module and a second type of battery module, the degree of influence of heat radiation of the engine is greater than a preset threshold, and the second type of battery module is other than the first type of battery module, and the method comprises:

determining that a corrected scene condition of the power battery is satisfied based on a running parameter of the hybrid vehicle;

determining that a corrected starting condition of the first type battery module is met based on a first cell temperature of the first type battery module and a second cell temperature of the second type battery module output by a temperature sensor;

Determining a temperature correction reference value of the first type of battery module based on the second cell temperature;

Determining a temperature correction target value of the first type of battery module based on the temperature correction reference value and the first cell temperature;

And correcting the first cell temperature output by the temperature sensor based on the temperature correction target value.

In one aspect, a temperature correction device for a power battery is provided, and the temperature correction device is applied to a hybrid vehicle, wherein the hybrid vehicle comprises a power battery and an engine, the power battery comprises a first type battery module and a second type battery module, the degree of influence of heat radiation of the engine is greater than a preset threshold, and the second type battery module is other than the first type battery module, and the device comprises:

a scene determination unit configured to determine that a corrected scene condition of the power battery is satisfied based on a running parameter of the hybrid vehicle;

The correction starting unit is used for determining that the correction starting condition of the first type of battery module is met based on the first cell temperature of the first type of battery module and the second cell temperature of the second type of battery module output by the temperature sensor;

the parameter determining unit is used for determining a temperature correction reference value of the first type of battery module based on the temperature of the second battery cell;

a target determination unit that determines a temperature correction target value of the first type battery module based on the temperature correction reference value and the first cell temperature;

And the temperature correction unit is used for correcting the first cell temperature output by the temperature sensor based on the temperature correction target value.

Optionally, the running parameter includes the running speed and a power value of the engine, and the scene determining unit is specifically configured to:

Extracting a first speed characteristic value and a power characteristic value corresponding to a first time period based on the running speed and the power value in the first time period which are a first preset time length away from the current time;

And if the first speed characteristic value is smaller than a first speed characteristic threshold value and the power characteristic value is larger than a preset power characteristic threshold value, determining that the correction scene condition is met.

Optionally, the first battery module includes at least one first battery module, and the second battery module includes at least one second battery module, and the correction opening unit is specifically configured to:

Determining a working temperature characteristic value of the power battery based on the first cell temperature of each first battery module and the second cell temperature of each second battery module;

Determining a temperature correction critical value based on the second cell temperature of each second battery module;

and when the working temperature characteristic value is not greater than the working temperature upper limit value and the cell temperature of any one of the first battery modules is not less than the temperature correction critical value, determining that the temperature correction condition is met.

Optionally, the cell temperature of each battery module includes a cell edge temperature and a cell middle temperature, and the correction opening unit is specifically configured to:

And when the working temperature characteristic value is not greater than the working temperature upper limit value and the temperature of the edge of the battery core of any one of the first battery modules is not less than the temperature correction critical value, determining that the temperature correction condition is met.

Optionally, the target determining unit is specifically configured to:

for each first battery module in the first battery modules, the following operations are respectively executed:

And determining the temperature correction target value based on the first difference value between the edge temperature of the battery cell of the first battery module and the middle temperature of the battery cell and the temperature correction reference value.

Optionally, the temperature correction unit is specifically configured to:

For each first battery module, the following operations are respectively executed:

Determining a second difference between the first cell temperature and the temperature correction target value;

based on a first adjustment rate in a preset temperature adjustment strategy, adjusting a temperature compensation value of the temperature sensor until the temperature compensation value is adjusted to the second difference value;

And determining the sum value between the first battery cell temperature and the temperature compensation value as the actual battery cell temperature for performing battery thermal management on the first type battery module.

Optionally, the apparatus further comprises a correction closing unit for:

if the degree of influence of the heat radiation of the engine on the first type of battery module is not greater than the preset threshold, determining that the modified closing condition of the power battery is met;

Adjusting a temperature compensation value based on a second adjustment rate in a preset temperature adjustment strategy until the temperature compensation value is adjusted to zero, wherein the second adjustment rate is smaller than the first adjustment rate;

determining the sum of the first cell temperature and the temperature compensation value as the actual cell temperature, or

And determining the first cell temperature as the actual cell temperature.

Optionally, the correction closing unit is specifically configured to:

When any one of the following conditions is satisfied, determining that the degree of influence of the heat radiation of the engine on the first type battery module is not greater than the preset threshold value:

The second speed characteristic value corresponding to a second time period of a second preset duration from the current moment is not smaller than a second speed characteristic threshold value;

the working temperature characteristic value of the power battery is larger than the upper limit value of the working temperature;

And when the duration time of temperature correction of the first type of battery module is not less than a preset duration time threshold value, and the correction scene condition and the correction starting condition are not met.

In one aspect, a hybrid vehicle is provided that includes a power battery and an engine, and a temperature correction device for the power battery.

In one aspect, a computer device is provided comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any of the methods described above when the computer program is executed.

In one aspect, there is provided a computer storage medium having stored thereon computer program instructions which, when executed by a processor, perform the steps of any of the methods described above.

The embodiment of the application has the following beneficial effects:

In the embodiment of the application, the condition that the current scene meets the correction scene of the power battery is determined according to the running parameters of the hybrid electric vehicle, and the condition that the first type battery module is corrected and started is determined according to the first cell temperature of the first type battery module and the second cell temperature of the second type battery module except the first type battery module, which are output by the temperature sensor and are influenced by the heat radiation of the engine, wherein the degree of the influence of the heat radiation of the engine is larger than a preset threshold value. After correction is started, a temperature correction reference value of the first type of battery module is determined according to the second battery cell temperature, then a temperature correction target value of the first type of battery module is determined by combining the first battery cell temperature, and finally correction processing is carried out on the first battery cell temperature output by the temperature sensor according to the determined temperature correction target value. According to the application, whether the temperature of the battery core needs to be corrected is determined through the two condition judging processes, so that the condition that the battery module of the hybrid power vehicle is seriously affected by heat radiation can be effectively identified, and the accuracy of temperature correction of the power battery is ensured. The method takes the corrected scene condition as a precondition, and judges the corrected opening condition when the running condition of the hybrid vehicle does not meet the corrected scene condition, so that the calculation resource is saved, and the processing efficiency is improved. After the battery cell temperature is identified to be corrected, the temperature correction target value of the first type battery module which is seriously affected by the heated radiation is determined through the battery cell temperature of the second type battery module which is not affected by the heated radiation or is not seriously affected by the heated radiation, so that the first battery cell temperature output by the temperature sensor is closer to the real temperature of the battery cell body, the accuracy of the temperature correction of the power battery is further ensured, and the situation that the safety of the vehicle running is affected by wrong battery thermal management of the hybrid electric vehicle due to the fact that the inaccurate battery cell temperature is adopted is avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only embodiments of the present application, and other drawings may be obtained according to the provided drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic view of an application scenario provided in an embodiment of the present application;

Fig. 2 is a schematic flow chart of a temperature correction method for a power battery according to an embodiment of the present application;

FIG. 3 is a schematic flow chart of judging a condition of a corrected scene according to an embodiment of the present application;

fig. 4 is a schematic diagram of a battery cell temperature of a battery module according to an embodiment of the present application;

Fig. 5 is another flow chart of a temperature correction method of a power battery according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a temperature correction device for a power battery according to an embodiment of the present application;

fig. 7 is a schematic diagram of a composition structure of a computer device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. Embodiments of the application and features of the embodiments may be combined with one another arbitrarily without conflict. Also, while a logical order is depicted in the flowchart, in some cases, the steps depicted or described may be performed in a different order than presented herein.

In order to facilitate understanding of the technical solution provided by the embodiments of the present application, some key terms used in the embodiments of the present application are explained here:

the battery thermal management is a technology for solving the problem of heat dissipation or thermal runaway caused by the operation of the battery under the condition of too high or too low temperature through reasonable design based on the optimal charge-discharge temperature interval of a specific battery according to the influence of temperature on the battery performance and combining the electrochemical characteristics and the heat generation mechanism of the battery, and improving the overall performance of the battery. The battery thermal management is used as the core of the battery energy storage system and comprises the technologies of liquid cooling, phase change materials and the like, the battery thermal management module is required to monitor the temperature change of the battery core through a temperature sensor in the running process, and the corresponding battery thermal management strategy is executed according to the current temperature, so that the charging and discharging processes of the battery core are controlled to be in an optimal temperature interval to ensure the battery safety.

A Battery management system (Battery MANAGEMENT SYSTEM, BMS) is a vehicle-mounted device for monitoring Battery status, for example, for monitoring Battery status, calculating and reporting auxiliary data, controlling Battery environment, balancing Battery temperature, etc., and generally comprises a management system, a control module, a display module, a wireless communication module, an electrical device, a Battery pack for supplying power to the electrical device, and an acquisition module for acquiring Battery information of the Battery pack.

Hybrid vehicles, a vehicle capable of obtaining power from at least two different types of vehicle-mounted stored energy such as a consumable fuel, a rechargeable energy or an energy storage device, are most common at present, and are vehicles with a thermal power source generated by a traditional internal combustion engine such as a gasoline engine or a diesel engine and an electric power source generated by a power battery and an electric motor, and comprise various vehicle types such as Plug-in Hybrid ELECTRIC VEHICLE (PHEV) and a Hybrid ELECTRICAL VEHICLE, HEV (Hybrid). By using the motor on the hybrid power vehicle, the power system can be flexibly regulated and controlled according to the actual running condition requirement of the vehicle, and the engine keeps working in the region with the best comprehensive performance, so that the oil consumption and the emission are reduced.

The battery module is characterized in that the battery cells are the minimum electric energy storage units of the power battery, a plurality of battery cells are packaged by the same shell frame to form the battery module of the vehicle and are used for being integrally connected with external parts, all the battery modules form a battery pack of the vehicle, and the battery management system and the battery thermal management system are used for jointly managing the battery modules, so that the power battery is a battery module formed by combining a plurality of battery cells according to a certain rule, and the battery module is an integral body formed by a plurality of battery modules.

The following briefly describes the design concept of the embodiment of the present application:

With the wide use of new energy automobiles, the safety of the power battery of the new energy automobile is one of the most concerned problems in the development process of the new energy automobile industry at present, and the battery cell is used as the minimum electric energy storage unit of the power battery, and the temperature of the battery cell is an important factor affecting the safety and performance of the battery. When the battery is charged and discharged, copper palladium or aluminum palladium on the electrode column of the battery core is used as an electric medium for connecting the battery core and is also subjected to current impact of corresponding magnitude, and the temperature of the battery core and the copper palladium or aluminum palladium can be gradually increased along with the continuous charge and discharge time extension, and the battery core and the copper palladium or aluminum palladium are mutually transferred to finally reach a heat balance state. Because the temperature of copper palladium or aluminum palladium is closest to the internal temperature of the battery cell in the battery module, the most common temperature acquisition mode of the battery thermal management strategy at present is to use a temperature sensor to be stuck on the copper palladium or aluminum palladium of each battery module, and the copper palladium or aluminum palladium is adopted to replace the internal temperature of the battery cell, so that the temperature change of the battery cell can be monitored at any time in the running process of the automobile, and the corresponding battery thermal management can be operated by using the temperature.

Hybrid vehicles, which are new vehicles powered cooperatively by a gasoline engine and a power battery, typically have an engine exhaust pipe disposed around the power battery due to limited internal space of the vehicle. When the engine of the hybrid electric vehicle runs, high-temperature waste heat generated by the engine is required to be discharged through the exhaust pipe, and when the engine runs at high power and the speed of the vehicle is low in a high-temperature environment, high-temperature radiation of the exhaust pipe cannot be taken away by flowing air in time, and the power battery module adjacent to the exhaust pipe is greatly influenced by the fact that the temperature of the copper harrow or the aluminum harrow on the electric core pole is interfered by heat radiation, and compared with the electric core body, the temperature of the copper harrow or the aluminum harrow is higher in the degree of heat radiation interference, so that the temperature of the copper harrow or the aluminum harrow acquired by the temperature sensor does not accurately reflect the actual temperature of the electric core of the power battery module, the battery thermal management of the vehicle cannot run normally, and the running safety of the vehicle is greatly influenced.

In view of the above, an embodiment of the present application provides a temperature correction method for a power battery, where a current scene is determined to satisfy a condition of a corrected scene of the power battery according to a driving parameter of a hybrid vehicle, and a corrected opening condition of the first type battery module is determined to be satisfied according to a first cell temperature of the first type battery module and a second cell temperature of a second type battery module, which are output by a temperature sensor and are affected by heat radiation of an engine to a degree greater than a preset threshold. After correction is started, a temperature correction reference value of the first type of battery module is determined according to the second battery cell temperature, then a temperature correction target value of the first type of battery module is determined by combining the first battery cell temperature, and finally correction processing is carried out on the first battery cell temperature output by the temperature sensor according to the determined temperature correction target value. According to the application, whether the temperature of the battery core needs to be corrected is determined through the two condition judging processes, so that whether the battery module of the hybrid power vehicle is under the heat damage working condition seriously influenced by heat radiation can be effectively identified, and the accuracy of the temperature correction of the power battery is ensured. The method takes the correction scene condition as a precondition, and when the running condition of the hybrid vehicle does not meet the correction scene condition, the correction starting condition is not required to be judged, so that the calculation resource is saved, and the correction efficiency is improved. After the battery cell temperature is identified to be corrected, the temperature correction target value of the first type battery module which is seriously affected by the heated radiation is determined through the battery cell temperatures of the other second type battery modules which are not seriously affected by the heated radiation, so that the first battery cell temperature output by the temperature sensor is closer to the actual temperature of the battery cell body, the accuracy of power battery temperature correction is further ensured, and the situation that the safety of the vehicle running is affected because the hybrid power vehicle adopts inaccurate battery cell temperature to perform wrong battery thermal management is avoided.

In order to further improve the accuracy and the correction efficiency of the temperature correction of the power battery, the embodiment of the application also sets the correction closing condition of the power battery, and when the degree of the influence of the heat radiation of the engine on the first type of battery module is not more than a preset threshold value, the temperature correction is closed in time, so that the accuracy of the temperature of the battery core is prevented from being influenced by excessive correction, and the calculation resource is saved. Meanwhile, in order to enable the temperature correction process of the power battery to be more in line with the characteristic of gradual temperature change under the real condition, the application adjusts the compensation temperature through a larger first adjustment rate in a preset temperature adjustment strategy in the correction opening process, and adjusts the compensation temperature to zero through a smaller second adjustment rate after correction closing, so that sudden rising and falling of the battery cell temperature are avoided.

The technical solution provided by the embodiment of the present application may be applicable to battery thermal management scenarios of power batteries of various hybrid vehicles, although depicted as hybrid vehicles, it should be understood that the concepts described herein are not limited to HEVs, PHEVs, and may be extended to other hybrid vehicles, including but not limited to fuel cell vehicles, and the like. As shown in fig. 1, a schematic structural diagram of a hybrid vehicle according to an embodiment of the present application may include a power battery 100, a temperature sensor 110, an engine 120, and a temperature correction device 130.

The power battery 100 is a power supply device configured by a plurality of battery modules 101 and providing an electric power source for the vehicle, for example, any device that provides an electric power source for the vehicle, such as a lithium power battery, a lead-acid battery, a hydrogen fuel battery, an aluminum air battery, a flow battery, and a graphene battery, such as a lithium metal battery and a lithium ion battery, is not particularly limited in this embodiment.

The temperature sensor 110 is a sensor capable of sensing the temperature and the change of various media and converting the temperature and the change into usable output signals, for example, a thermistor sensor, a thermocouple sensor, a platinum resistor temperature sensor, a digital output sensor and the like, which can be arranged on each battery module of the power battery, and the temperature of the battery module is collected in real time and sent to the temperature correction device 130.

The engine 120 is an energy device for providing a heat power source, including but not limited to an internal combustion engine such as a gasoline engine or a diesel engine for generating the heat power source by using a consumable fuel, and in order to exhaust unavoidable high-temperature waste heat during the generation of the heat power source, the engine is provided with an exhaust system, and because of space limitation of a vehicle, the exhaust system of the engine is usually arranged around a power battery, and heat radiation generated by the engine affects the accuracy of the temperature of a battery cell collected by a temperature sensor on a battery module adjacent to the engine, so that the temperature of the battery cell output by the temperature sensor no longer accurately reflects the actual temperature of the battery cell, and normal operation of battery thermal management and safety of vehicle running are affected.

The temperature correction device 130 is a computing device with a certain computing capability and capable of realizing a temperature correction function, and is an execution main body of the temperature correction function of the power battery provided by the embodiment of the application, that is, the temperature correction device 130 can acquire the cell temperature data of each battery module from the temperature sensor, and based on the temperature correction method of the power battery provided by the embodiment of the application, the function of correcting the cell temperature output by the temperature sensor is realized. It should be understood that, the computing device provided in the embodiment of the present application may be a device having a computing function, such as a vehicle-mounted terminal device or a server, that is, the temperature correction device 130 may be a vehicle-mounted terminal device disposed in a vehicle, that is, the vehicle-mounted terminal device may perform temperature correction based on temperature sensor data, for example, a battery management system BMS, by itself, or may be a server connected to the vehicle-mounted terminal device, where the vehicle-mounted terminal device transmits relevant data, such as a battery temperature, obtained by a temperature sensor, to the server through a connection network, and after the server receives and performs relevant temperature correction processing, the server returns a relevant result to the vehicle-mounted terminal device.

It should be noted that, the number of battery modules and the number of temperature sensors provided in the battery module are not limited in practice, and are not particularly limited in the embodiment of the present application, as shown in fig. 1. And the components and structures shown in fig. 1 are exemplary only and not limiting, and other components and structures may be provided as desired in a practical scenario.

Of course, the method provided by the embodiment of the present application is not limited to the application scenario shown in fig. 1, but may be used in other possible application scenarios, and the embodiment of the present application is not limited. The functions that can be implemented by each device in the application scenario shown in fig. 1 will be described together in the following method embodiments, which are not described in detail herein.

The temperature correction method of the power battery provided by the exemplary embodiment of the present application will be described below with reference to the accompanying drawings in conjunction with the above-described application scenario, and it should be noted that the above-described application scenario is only shown for the convenience of understanding the spirit and principle of the present application, and the embodiment of the present application is not limited in any way in this respect.

Referring to fig. 2, a schematic flow chart of a temperature correction method for a power battery according to an embodiment of the present application is illustrated by taking a temperature correction device as an execution body, and a specific implementation flow of the method is as follows:

Step 201, based on the running parameters of the hybrid vehicle, determining whether the modified scene condition of the power battery is satisfied, if yes, jumping to execute step 202, otherwise, ending.

In the embodiment of the application, before the temperature correction device corrects the power battery, the temperature correction device needs to judge whether the working condition of the vehicle at the current moment meets the preset condition of the correction scene of the power battery according to the running parameter of the hybrid vehicle at the current moment, so as to determine whether the subsequent temperature correction process is carried out.

In one possible embodiment, the driving parameters of the hybrid vehicle may be the driving speed of the hybrid vehicle and the power value of the engine, and the corrected scene condition indicates that the power battery may not be affected by the heat radiation of the engine to a great extent when the hybrid vehicle is driven at the preset driving speed and the power of the engine, so that the temperature of the battery cell output by the temperature sensor no longer accurately indicates the actual temperature of the battery cell. For example, through actual scene test and related data analysis, when the vehicle is under the working condition of high-power running and low-speed running of the engine, for example, in a rolling time of 20 minutes, the average power of the engine is greater than 60 kilowatts, and the average running speed is less than 40 kilometers per hour, high-temperature radiation generated by the engine exhaust pipe can influence the accuracy of the temperature sensor for collecting the temperature of the battery cells adjacent to the engine exhaust pipe inside the power battery. If the running speed of the vehicle is increased, the air flowability in the battery is enhanced, the high-temperature radiation is taken away by flowing air in time, so that the temperature acquisition of the battery cell is not greatly influenced, or the power of the engine is reduced, the excessive heat radiation is not generated, at the moment, the error of the temperature of the battery cell acquired by the temperature sensor is in a normal range, the normal running of the thermal management of the battery is not influenced, and the temperature is corrected without consuming calculation resources.

In one possible implementation manner, after the temperature correction device obtains the relevant running parameters of the vehicle at the current moment, the first speed characteristic value and the power characteristic value corresponding to the first time period can be extracted according to the running speed and the power value in the first time period of a first preset duration from the current moment. And determining whether the corrected scene condition is met by determining whether the first speed characteristic value is smaller than the first speed characteristic threshold value and whether the power characteristic value is larger than the preset power characteristic threshold value, so that a decision flow of whether the subsequent corrected starting condition is carried out can be determined. And when the first speed characteristic value is smaller than the first speed characteristic threshold value and the power characteristic value is larger than the preset power characteristic threshold value, namely, the current running scene is a running scene with low speed and high power, determining whether the condition of the corrected scene is met.

Specifically, the temperature correction device may calculate, according to a plurality of instantaneous traveling speeds and instantaneous powers in a first period, an average speed and an average power corresponding to the period, and use the average speed and the average power as a speed characteristic value and a power characteristic value, respectively.

Referring to fig. 3, the temperature correction device always acquires the relevant running parameters of the vehicle at the current moment to determine whether the condition of the corrected scene is satisfied, and once the running parameters satisfy the preset condition, the temperature correction is performed in the subsequent process. When the running parameters of the vehicle do not meet the condition of the correction scene, the battery core temperature of the power battery output by the temperature sensor at the current moment is normal, and the battery heat management can be directly carried out by using the battery core temperature output by the sensor without carrying out temperature correction on the battery.

Specifically, the temperature correction device may be connected to a related control system of the vehicle through a controller area network (Controller Area Network, CAN) bus to obtain the required driving parameters. The engine power value of the vehicle at a specific time, the running speed of the vehicle at a specific time, from an electric power steering system (Electric Power Steering, EPS) or a vehicle speed or wheel speed sensor, for example, may be obtained from an engine controller (Electronic Control Unit, ECU).

Step 202, determining whether a modified starting condition of the first type battery module is met or not based on the first cell temperature of the first type battery module and the second cell temperature of the second type battery module output by the temperature sensor, if yes, jumping to execute step 203, and if not, ending.

In the embodiment of the application, after the temperature correction device determines that the preset correction scene condition of the power battery is met, the cell temperature of each battery module on the power battery needs to be obtained from the temperature sensor, wherein the cell temperature comprises the first cell temperature of a first type of battery module, which is influenced by the heat radiation of the engine to a degree greater than a preset threshold value, and the second cell temperature of a second type of battery module except the first type of battery module, and whether the preset correction starting condition is met is judged to determine whether to carry out temperature correction for the first type of battery module.

In one possible embodiment, the first type battery module and the second type battery module of the power battery include a plurality of first battery modules and a plurality of second battery modules, respectively. The temperature correction device can jointly determine the working temperature characteristic value of the power battery at the current moment according to the first cell temperature of each first battery module at the current moment and the second cell temperature of each second battery module at the current moment. For example, in a battery cell temperature set consisting of the first battery cell temperature of each first battery module and the second battery cell temperature of each second battery module at the current moment, the highest battery cell temperature can be determined as the working temperature characteristic value of the power battery at the current moment by comparing the magnitudes of all battery cell temperatures in the battery cell temperature set. And then determining a temperature correction critical value at the current moment of the power battery according to the second cell temperature of each second battery module independently, for example, determining the highest second cell temperature as the temperature correction critical value by comparing the second cell temperatures of each second battery module. Under the above conditions, the temperature correction device determines that the working conditions of the first type of battery modules of the power battery at the current moment meet the temperature correction conditions by judging that the working temperature characteristic value is not larger than the preset working temperature upper limit value and the cell temperatures of all the first battery modules are not smaller than the temperature correction critical value. The preset working temperature upper limit value represents the maximum temperature value of the battery cell capable of working normally, and can be set automatically according to different vehicle types, power batteries, running conditions and the like. When the temperature correction equipment determines that the highest cell temperature in all the battery modules is not greater than the upper limit value of the working temperature, the cell temperature of all the battery modules at the current moment can be determined to ensure that the cells work normally. Meanwhile, when the cell temperatures of all the first battery modules are not smaller than the temperature correction critical value, the fact that the temperatures of all the first battery modules are higher than those of all the second battery modules which are not affected by the heat radiation is indicated, the fact that the first battery modules are affected by the heat radiation at the current moment can be determined, and the temperature correction is needed when the temperature of the first cell is abnormally increased.

For example, if the power battery includes 4 battery modules with battery numbers 1-4, the 1-2 battery modules near the exhaust pipe of the engine are two first battery modules of the first type, and the other 3-4 battery modules are second battery modules of the second type. After the temperature correction device obtains the first cell temperatures of the No. 1-2 battery modules from the temperature sensor to be 50 ℃ and 52 ℃ respectively, and the second cell temperatures of the No. 3-4 battery modules to be 40 ℃ and 38 ℃ respectively, the maximum value 52 ℃ in the 4 cell temperatures can be determined to be the working temperature characteristic value of the power battery at the current moment, and the maximum value 40 ℃ in the 2 second cell temperatures can be determined to be the temperature correction critical value of the power battery at the current moment. At this time, since the 50 ℃ working temperature characteristic value is smaller than the preset 60 ℃ working temperature upper limit value and the first cell temperatures of the No. 1-2 battery modules are all larger than the 40 ℃ temperature correction critical value, the temperature correction device determines that the No. 1-2 battery modules at the current moment need to be subjected to temperature correction.

In one possible embodiment, as shown in fig. 4, the cell temperature of each battery module includes a cell edge temperature T _b and a cell intermediate temperature T _z, where the cell edge temperature represents a temperature-sensing analog signal of the cell edge position temperature detected by the sensor and the cell intermediate temperature represents a temperature-sensing analog signal of the cell intermediate position temperature detected by the sensor. Since the engine exhaust pipe is generally disposed at the periphery of the power battery, the cell edge position of each battery module is more affected by the heat radiation of the engine exhaust pipe than the cell middle position, and in a real situation, the cell edge temperature is generally higher than the cell middle temperature. Therefore, when the temperature correction device judges the correction starting condition, the temperature correction condition can be met by judging that the edge temperature of the battery core of each first battery module is not smaller than the temperature correction critical value, and the first battery module at the current moment can be determined.

And 203, determining a temperature correction reference value of the first type of battery module based on the second cell temperature.

In the embodiment of the application, after the temperature correction equipment determines that the preset correction scene condition and the correction start condition are met, the temperature correction equipment starts to carry out temperature correction on the first type of battery modules. First, determining a temperature correction reference value of the first type of battery module according to the second cell temperature of each second battery module. The temperature correction reference value represents a reference value of the temperature of the battery cell when the first battery module is not affected by heat radiation.

In one possible implementation manner, after the temperature correction device determines to correct the temperature of the first battery module, the temperature correction device may acquire the battery cell temperature at the latest moment from the temperature sensor in real time, where each battery cell temperature value used in the correction process is the battery cell temperature value acquired by the temperature sensor at the latest moment in real time.

In one possible implementation manner, after determining to perform temperature correction on the first type of battery module, the temperature correction device may use the cell temperature values of the first type of battery module as the cell temperature values of the second type of battery module received at the correction start time.

In one possible embodiment, since the cell edge position of each battery module is more affected by the heat radiation of the engine exhaust pipe than the cell middle position, it is generally considered to correct the cell edge temperature of the first battery module. The temperature correction device can determine that the median or average number is a temperature correction reference value in a battery core temperature set formed by the battery core middle temperatures of the second battery modules which are not affected by heat radiation, the reference value of the battery core middle temperature when the first battery module is not affected by heat radiation is represented, and the median can avoid being affected by the maximum and minimum extreme values, so that the central trend of the battery core temperature set is reflected more.

And 204, determining a temperature correction target value of the first type of battery module based on the temperature correction reference value and the first cell temperature.

In the embodiment of the application, after the temperature correction reference value of the first type of battery module is determined, the temperature correction device also needs to determine the temperature correction target value of the first type of battery module by combining the first cell temperatures of the first type of battery modules so as to correct the first cell temperature output by the temperature sensor.

In one possible embodiment, since the temperature at which the cell edge is unknown is necessarily higher than the temperature at the intermediate position among the actual cell temperatures of the first battery module, there is an unavoidable temperature difference therebetween. The temperature correction device needs to determine a first difference value according to the first cell temperature of each first battery module and the cell edge temperature and the cell middle temperature, and respectively determines a temperature correction target value corresponding to each first battery module by combining the temperature correction reference value.

In one possible implementation manner, when the temperature of the edge of the battery cell of the first battery module is corrected, the temperature correction device may calculate the difference between the temperature of the edge of the battery cell of the first battery module and the temperature of the middle of the battery cell, take the absolute value of one half of the difference as the first difference, and take the sum of the first difference and the temperature correction reference value as the temperature correction target value corresponding to the first battery module. Specifically, the temperature correction device may determine the temperature correction target value corresponding to each first battery module through a preset heat damage algorithm, where the heat damage algorithm is as follows:

T_after＝|(T_b-T_Z)/2|+T_zz

Wherein T _after is a temperature correction target value of the battery cell edge temperature of the first battery module, T _b is the battery cell edge temperature of the first battery module, T _Z is the battery cell intermediate temperature of the first battery module, and Tzz is a temperature correction reference value.

And 205, correcting the first cell temperature output by the temperature sensor based on the temperature correction target value.

In the embodiment of the application, after the temperature correction target value corresponding to the first battery cell temperature is determined, the temperature correction device corrects the first battery cell temperature output by the temperature sensor according to the preset temperature adjustment strategy, and then uses the corrected first battery cell temperature as the actual battery cell temperature for battery thermal management of the power battery.

In one possible implementation manner, when the temperature correction device corrects the first cell temperature of each first battery module, the temperature compensation value of the temperature sensor may be adjusted according to the first adjustment rate in the preset temperature adjustment strategy by calculating the second difference between the first cell temperature and the temperature correction target value, until the temperature compensation value is adjusted to the second difference, and finally, the sum value between the first cell temperature and the temperature compensation value is determined as the actual cell temperature for performing battery thermal management on the first battery module. For example, if the temperature of the first battery cell to be corrected is 50 ℃, and the temperature correction target value is calculated to be 40 ℃ by the heat damage algorithm, the temperature correction device can calculate that the second difference value is-10 ℃, gradually increase the temperature compensation value of the temperature sensor from zero to-10 ℃ at a preset adjustment rate of 5 ℃ per minute, and finally calculate and output the sum value of the temperature compensation value of the first battery cell temperature of 50 ℃ and the temperature compensation value of-10 ℃ to be 40 ℃, namely the actual battery cell temperature of the first battery module for battery thermal management is 40 ℃.

In one possible implementation manner, the vehicle can receive and process the cell temperature data of each battery module in the power battery in real time through the battery management system, when the cell temperature of each battery module is increased to a preset warning value of the battery management system, the battery management system gives a battery thermal management starting instruction, and the battery thermal management module cools the battery module by starting a fan or a cooling water channel and the like. And when the temperature of the battery core is too low, the battery management system can open the battery heating device to heat the battery core, so that the charging and discharging operation of the power battery is kept in an optimal working temperature range, and the running safety of the vehicle is ensured.

In one possible embodiment, in order to further improve the accuracy and the correction efficiency of the temperature correction of the power battery, a correction closing condition may be set during the temperature correction of the power battery to end the correction. Referring to fig. 5, another flow chart of a temperature correction method for a power battery according to an embodiment of the present application is shown, and a specific implementation flow of the method is as follows:

And step 501, performing correction processing on the first cell temperature output by the temperature sensor based on the temperature correction target value.

The procedure of step 501 is the same as that of step 205, so reference is made to the foregoing description, and no further description is given here.

Step 502, judging whether the degree of influence of the heat radiation of the engine on the first type of battery module is not more than a preset threshold value, so as to determine whether the modified closing condition of the power battery is met. If yes, jump to step 503, otherwise, end.

In the embodiment of the application, after the temperature correction device starts to correct the temperature of the first type of battery module, the temperature correction device can determine that the correction closing condition of the power battery is met by determining that the first type of battery module is not influenced by the heat radiation of the engine exceeding the preset threshold at the current moment, so as to finish the temperature correction.

In one possible implementation manner, the temperature correction device may comprehensively determine whether the first battery module is affected by the heat radiation of the engine exceeding a preset threshold value at the current moment through related parameters such as a running parameter, a battery cell temperature, a temperature correction duration and the like of the vehicle at the current moment.

Specifically, when the temperature correction device determines that the relevant parameters of the vehicle at the current moment meet any one of the following conditions, it may be determined that the degree of influence of the heat radiation of the engine on the first battery module is not greater than a preset threshold value:

(1) And the second speed characteristic value corresponding to a second time period of a second preset duration from the current moment is not smaller than a second speed characteristic threshold value.

Specifically, because the heat radiation generated by the engine is taken away by flowing air in time under the higher running speed of the hybrid electric vehicle, the first type of battery module is not influenced by the heat radiation of the engine exceeding a preset threshold value, and the temperature of the battery cell is not required to be corrected. Therefore, the temperature correction device can acquire a plurality of instantaneous running speeds in a time period which is a certain time period from the current moment from the EPS, the vehicle speed or the wheel speed sensor, calculate the average speed corresponding to the time period and serve as the speed characteristic value. Whether the vehicle is at a high running speed, for example, an average vehicle speed of not less than 70 km/h for a rolling time of 30 minutes is determined by determining whether the speed characteristic value is not less than a preset second speed characteristic threshold value.

(2) The operating temperature characteristic value of the power battery is larger than the upper limit value of the operating temperature.

Specifically, the upper limit value of the working temperature represents the maximum temperature value of the battery core of the power battery which can normally work, and when the characteristic value of the working temperature of the power battery exceeds the upper limit value of the working temperature, the battery core of the power battery is indicated to be in an abnormal working state such as thermal runaway, if the temperature of the battery core is continuously corrected at the moment, the thermal management of the battery is possibly influenced by the corrected battery core temperature, and the related treatment can not be performed in time for the abnormal condition of the battery core such as thermal runaway.

(3) When the duration time of temperature correction of the first type of battery module is not less than the preset duration time threshold value, and the correction scene condition and the correction starting condition are not met.

Specifically, in order to save computing resources and improve correction efficiency, the temperature correction device may be set to stop correction after the temperature correction duration of the first type of battery module exceeds a preset duration threshold. However, if the temperature correction device determines that the correction scene condition and the correction start condition are still met according to the relevant parameters of the vehicle at this time, the battery core temperature of the first type of battery module is continuously corrected, so that the battery core temperature output by the final temperature sensor is ensured to be close to the actual battery core temperature, and the vehicle can correctly operate the corresponding battery thermal management strategy.

Step 503, adjusting the temperature compensation value based on a second adjustment rate in a preset temperature adjustment strategy.

In the embodiment of the application, after the temperature correction device determines that the temperature correction of the battery cell temperature is finished, in order to make the change of the battery cell temperature more conform to the temperature change condition in the actual condition, that is, the temperature change is gradually performed, and sudden rising or falling is impossible. The temperature compensation value may be reduced by a second adjustment rate that is smaller than the first adjustment rate. For example, in the process of adjusting the compensation temperature to the target value at the rate of 5 ℃ per minute, if the temperature correction device determines that the relevant parameter of the vehicle at the current time satisfies the correction closing condition, the correction is stopped, and the temperature value compensated at the current time is gradually reduced to zero at the rate of 1 ℃ per minute.

Step 504, determining the sum between the first cell temperature and the temperature compensation value as the actual cell temperature, or determining the first cell temperature as the actual cell temperature.

In the embodiment of the application, when the temperature correction equipment determines that the temperature correction needs to be closed in the process of temperature correction, the sum of the first battery cell temperature and the temperature compensation value at the current moment can be determined as the actual battery cell temperature, and the first battery cell temperature output by the temperature sensor at the current moment can also be directly determined as the actual battery cell temperature for carrying out battery thermal management on the first battery module.

In one possible implementation manner, each cell temperature value used by the temperature correction device in the correction process may be a cell temperature value acquired by the temperature sensor at the latest moment in real time, so when the temperature correction device determines to stop the temperature correction, the latest first cell temperature at the current moment may be directly determined as the actual cell temperature.

In one possible embodiment, each cell temperature value used by the temperature correction device in the correction process may be a cell temperature value of each battery module received at the time of the start of correction, so that when the temperature correction device determines to stop the temperature correction, a sum of the first cell temperature value received at the time of the start of correction and the current time temperature compensation value may be determined as the actual cell temperature.

Step 505, judging whether the temperature compensation value is equal to zero, if yes, ending, if not, jumping to execute step 503.

In the embodiment of the application, the temperature correction device reduces the temperature compensation value through the smaller second adjustment rate, so that the temperature compensation value gradually drops to zero to finish the temperature correction flow. For example, when the temperature correction device determines to stop the temperature correction flow, if the temperature compensation value at this time is-10 ℃, it will take 10 minutes to reduce the temperature value compensated at the present time to zero at an adjustment rate of 1 ℃ per minute.

Referring to fig. 6, based on the same inventive concept, an embodiment of the present application further provides a temperature correction device 60 of a power battery, applied to a hybrid vehicle, the hybrid vehicle including a power battery and an engine, the power battery including a first type of battery module and a second type of battery module except the first type of battery module, the first type of battery module being affected by heat radiation of the engine to a degree greater than a preset threshold, the device including:

A scene determination unit 601 for determining that a corrected scene condition of the power battery is satisfied based on a running parameter of the hybrid vehicle;

A correction opening unit 602, configured to determine that a correction opening condition of the first type battery module is satisfied based on a first cell temperature of the first type battery module and a second cell temperature of the second type battery module output by the temperature sensor;

a parameter determining unit 603, configured to determine a temperature correction reference value of the first type of battery module based on the second cell temperature;

a target determination unit 604 that determines a temperature correction target value of the first type of battery module based on the temperature correction reference value and the first cell temperature;

the temperature correction unit 605 is configured to perform correction processing on the first cell temperature output by the temperature sensor based on the temperature correction target value.

Optionally, if the driving parameters include the driving speed and the power value of the engine, the scene determining unit 601 is specifically configured to:

If the first speed characteristic value is smaller than the first speed characteristic threshold value and the power characteristic value is larger than the preset power characteristic threshold value, determining that the correction scene condition is met.

Optionally, the first battery module includes at least one first battery module, and the second battery module includes at least one second battery module, and the correction opening unit 602 is specifically configured to:

Optionally, the cell temperature of each battery module includes a cell edge temperature and a cell middle temperature, and the modification opening unit 602 is specifically configured to:

Optionally, the target determining unit 604 is specifically configured to:

for each first battery module in each first battery module, the following operations are respectively executed:

A temperature correction target value is determined based on a first difference between a cell edge temperature and a cell intermediate temperature of the first battery module and a temperature correction reference value.

Optionally, the temperature correction unit 605 is specifically configured to:

for each first battery module, the following operations are performed:

Based on a first adjustment rate in a preset temperature adjustment strategy, adjusting a temperature compensation value of the temperature sensor until the temperature compensation value is adjusted to a second difference value;

And determining the sum value between the first cell temperature and the temperature compensation value as the actual cell temperature for performing battery thermal management on the first type of battery module.

Optionally, the temperature correction device of the power battery further includes a correction closing unit 606 for:

If the degree of influence of the heat radiation of the engine on the first battery module is not greater than a preset threshold, determining that the correction closing condition of the power battery is met;

adjusting the temperature compensation value based on a second adjustment rate in a preset temperature adjustment strategy until the temperature compensation value is adjusted to zero, wherein the second adjustment rate is smaller than the first adjustment rate;

And determining the first cell temperature as the actual cell temperature.

Optionally, the correction closing unit 606 is specifically configured to:

when any one of the following conditions is met, determining that the degree of influence of the heat radiation of the engine on the first type of battery modules is not more than a preset threshold value:

The characteristic value of the working temperature of the power battery is larger than the upper limit value of the working temperature;

when the duration time of temperature correction of the first type of battery module is not less than the preset duration time threshold value, and the correction scene condition and the correction starting condition are not met.

By the device, the condition that the current scene meets the correction scene of the power battery is determined according to the running parameters of the hybrid electric vehicle, and the condition that the first battery module is corrected and started is determined according to the first cell temperature of the first battery module and the second cell temperature of the second battery module except the first battery module, wherein the first cell temperature of the first battery module and the second cell temperature of the second battery module are output by the temperature sensor and are influenced by the heat radiation of the engine to a degree greater than a preset threshold value. After correction is started, a temperature correction reference value of the first type of battery module is determined according to the second battery cell temperature, then a temperature correction target value of the first type of battery module is determined by combining the first battery cell temperature, and finally correction processing is carried out on the first battery cell temperature output by the temperature sensor according to the determined temperature correction target value.

For convenience of description, the above parts are respectively described as being functionally divided into unit modules (or modules). Of course, the functions of each unit (or module) may be implemented in the same piece or pieces of software or hardware when implementing the present application. The apparatus may be used to perform the methods shown in the embodiments of the present application, and therefore, the description of the foregoing embodiments may be referred to for the functions that can be implemented by each functional module of the apparatus, and the like, which are not repeated.

Referring to fig. 7, based on the same technical concept, the embodiment of the application further provides a computer device. In one embodiment, the computer device may include a memory 701, a communication module 703, and one or more processors 702 as shown.

Memory 701 for storing a computer program for execution by processor 702. The memory 701 may mainly include a storage program area that may store an operating system, a storage data area that may store various operating instruction sets, and the like.

The memory 701 may be a volatile memory (RAM) such as a random-access memory (RAM), a non-volatile memory (non-volatile memory) such as a read-only memory (rom), a flash memory (flash memory), a hard disk (HARD DISK DRIVE, HDD) or a solid state disk (solid-state drive) (STATE DRIVE, SSD), or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto. Memory 701 may be a combination of the above.

The processor 702 may include one or more central processing units (central processing unit, CPUs) or digital processing units, or the like. And a processor 702 for implementing the temperature correction method of the power battery when calling the computer program stored in the memory 701.

The communication module 703 is used to communicate with a message processing device or other network device.

The specific connection medium between the memory 701, the communication module 703 and the processor 702 is not limited in the embodiment of the present application. The embodiment of the present application is shown in fig. 7, where the memory 701 and the processor 702 are connected by a bus 704, where the bus 704 is shown in bold in fig. 7, and the connection between other components is merely illustrative, and not limiting. The bus 704 may be divided into an address bus, a data bus, a control bus, and the like. For ease of description, only one thick line is depicted in fig. 7, but only one bus or one type of bus is not depicted.

The memory 701 stores a computer storage medium in which computer executable instructions for implementing the temperature correction method of the power battery according to the embodiment of the present application are stored. The processor 702 is configured to perform the temperature correction method of the power battery of each of the above embodiments.

Based on the same inventive concept, the embodiments of the present application also provide a storage medium having stored thereon a computer program which, when executed on a computer, causes a computer processor to perform the steps in the temperature correction method of a power battery according to the various embodiments of the present application described above in the present specification.

In some possible embodiments, aspects of the temperature correction method of a power battery provided by the present application may also be implemented in the form of a program product, which includes program code for causing a computer device to perform the steps of the temperature correction method of a power battery according to the various exemplary embodiments of the present application described herein above, when the program product is run on a computer device, for example, the computer device may perform the steps of the embodiments.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of a readable storage medium include an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

The program product of embodiments of the present application may employ a portable compact disc read only memory (CD-ROM) and include program code and may run on a computing device. However, the program product of the present application is not limited thereto, and in the present application, the readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with a command execution system, apparatus, or device.

The readable signal medium may include a data signal propagated in baseband or as part of a carrier wave with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with a command execution system, apparatus, or device.

Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out operations of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's equipment, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., connected via the Internet using an Internet service provider).

It should be noted that although several units or sub-units of the apparatus are mentioned in the above detailed description, such a division is merely exemplary and not mandatory. Indeed, the features and functions of two or more of the elements described above may be embodied in one element in accordance with embodiments of the present application. Conversely, the features and functions of one unit described above may be further divided into a plurality of units to be embodied.

Furthermore, although the operations of the methods of the present application are depicted in the drawings in a particular order, this is not required or suggested that these operations must be performed in this particular order or that all of the illustrated operations must be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A temperature correction method of a power battery, which is applied to a hybrid vehicle including a power battery and an engine, the power battery including a first type battery module that is affected by heat radiation of the engine to a degree greater than a preset threshold and a second type battery module other than the first type battery module, the method comprising:

2. The method of claim 1, wherein the travel parameters include a travel speed and a power value of the engine, and wherein the determining that the modified scenario condition of the power battery is satisfied based on the travel parameters of the hybrid vehicle comprises:

3. The method of claim 1, wherein the first type of battery module comprises at least one first battery module and the second type of battery module comprises at least one second battery module, and wherein determining that the modified on condition of the first type of battery module is satisfied based on the first cell temperature of the first type of battery module and the second cell temperature of the second type of battery module output by the temperature sensor comprises:

4. The method of claim 3, wherein the cell temperature of each battery module includes a cell edge temperature and a cell middle temperature, and wherein determining that the temperature correction condition is satisfied when the operating temperature characteristic value is not greater than an operating temperature upper limit value and the cell temperature of any one of the first battery modules is not less than the temperature correction threshold value comprises:

5. The method of claim 4, wherein determining the temperature correction target value for the first type of battery module based on the temperature correction reference value and the first cell temperature comprises:

6. The method of claim 3, wherein said modifying said first cell temperature output by said temperature sensor based on said temperature modification target value comprises:

7. The method of claim 6, wherein after determining that the modified on condition of the first type of battery module is satisfied based on the first cell temperature of the first type of battery module and the second cell temperature of the second type of battery module output from the temperature sensor, the method further comprises:

And determining the first cell temperature as the actual cell temperature.

8. The method according to claim 7, wherein it is determined that the degree of influence of the heat radiation of the engine on the first-type battery module is not greater than the preset threshold value when any of the following conditions is satisfied:

9. A temperature correction device of a power battery, characterized in that it is applied to a hybrid vehicle including a power battery and an engine, the power battery including a first type battery module that is affected by heat radiation of the engine to a degree greater than a preset threshold and a second type battery module other than the first type battery module, the device comprising:

the starting determining unit is used for determining that the corrected starting condition of the first type of battery module is met based on the first cell temperature of the first type of battery module and the second cell temperature of the second type of battery module output by the temperature sensor;

And the correction unit is used for correcting the first cell temperature output by the temperature sensor based on the temperature correction target value.

10. A hybrid vehicle comprising a power battery and an engine, and the temperature correction device for a power battery according to claim 9.

11. A computer device, comprising:

a memory for storing a computer program;

a processor for implementing the steps of the method according to any one of claims 1 to 8 when executing the computer program.

12. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1-8.