CN110739739B

CN110739739B - Charge control method, charge control device, and electronic device

Info

Publication number: CN110739739B
Application number: CN201911025920.8A
Authority: CN
Inventors: 李志杰
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2021-08-20
Anticipated expiration: 2039-10-25
Also published as: CN110739739A; WO2021077933A1

Abstract

The present application provides a charging control method, a charging control device and an electronic device, including: during the process of charging the electronic device, controlling the electronic device to enter a multi-stage second charging stage from a first charging stage, the multi-stage charging The cut-off voltage and charging current of the second charging stage are sequentially decreased; if the battery voltage and/or charging current of the electronic device meet the preset conditions in the last charging stage of the multi-stage second charging stage, the control exits the Multi-stage second charging stage. In the charging control method provided by the present application, in the process of charging the electronic device, if the battery of the electronic device is aging or the current electronic device is in a low temperature environment, the charging time can be reduced by controlling the cut-off voltage and charging current during the charging process , thereby improving the charging efficiency.

Description

Charging control method, charging control device and electronic device

Technical Field

The embodiment of the application relates to the technical field of charging, and more particularly relates to a charging control method, a charging control device and an electronic device.

Background

With the popularization of electronic devices (such as mobile phones, pads, bracelets, etc.), the functions of electronic devices are continuously enriched, some manufacturers have released electronic devices supporting a fast charging mode, and the fast charging technology greatly shortens the charging time of electronic devices and is popular among users.

However, in the case of an aged battery or a low-temperature environment, the internal resistance of the battery increases, and the float voltage (voltage across the internal resistance of the battery) also increases, so that the acquired battery voltage is higher than the actual voltage of the battery. In other words, in the case of aging or low temperature of the battery, the electric quantity of the battery at the end of the rapid charging phase is less than that in the normal case, and the remaining electric quantity to be fully charged needs to continue constant current charging for a while. However, the collected battery voltage is high and cannot drop in a short time, so that the time of the preset constant-current charging stage is short, the time of entering the common charging stage is increased, and the charging efficiency is reduced.

Disclosure of Invention

The embodiment of the application provides a charging control method, a charging control device and an electronic device, so as to solve the charging problem in the related art.

In a first aspect, a charging control method is provided, including: in the process of charging the electronic equipment, controlling the electronic equipment to enter a multi-section second charging stage from a first charging stage, wherein the charging currents of the first charging stage and the second charging stage are constant currents, the charging currents of the multi-section second charging stage are smaller than the charging currents of the first charging stage, and the cut-off voltage and the charging currents of the multi-section second charging stage are sequentially reduced; and if the battery voltage and/or the charging current of the electronic equipment meet the preset conditions in the last charging stage of the plurality of stages of second charging stages, controlling to exit the plurality of stages of second charging stages.

In a second aspect, there is provided a charge control device including: the control unit is used for controlling the electronic equipment to enter a multi-section second charging stage from a first charging stage in the process of charging the electronic equipment, the charging currents of the first charging stage and the second charging stage are constant currents, the charging currents of the multi-section second charging stage are smaller than the charging currents of the first charging stage, and the cut-off voltage and the charging currents of the multi-section second charging stage are sequentially reduced; and if the battery voltage and/or the charging current of the electronic equipment meet the preset conditions in the last charging stage of the plurality of stages of second charging stages, controlling to exit the plurality of stages of second charging stages.

In a third aspect, an electronic device is provided, including: the processor is used for controlling the electronic equipment to enter a multi-section second charging stage from a first charging stage in the process of charging the electronic equipment, the charging currents of the first charging stage and the multi-section second charging stage are constant currents, the charging currents of the multi-section second charging stage are smaller than the charging currents of the first charging stage, and the cut-off voltage and the charging currents of the multi-section second charging stage are sequentially reduced; and if the battery voltage and/or the charging current of the electronic equipment meet the preset conditions in the last charging stage of the plurality of stages of second charging stages, controlling to exit the plurality of stages of second charging stages.

In a fourth aspect, there is provided a computer readable storage medium for storing a computer program for causing a computer to perform the method of the first aspect or any of its implementations.

In a fifth aspect, there is provided a computer program product, characterized in that it comprises computer program instructions for causing a computer to execute the method of the first aspect or any one of its implementations.

According to the charging control method, in the process of charging the electronic equipment, if the battery of the electronic equipment is aged or the current electronic equipment is in a low-temperature environment, the charging time can be shortened by controlling the cut-off voltage and the charging current in the charging process, so that the charging efficiency is improved.

Drawings

Fig. 1a is a schematic diagram of a charging current variation in a charging process of a device to be charged according to an embodiment of the present application;

fig. 1b is a schematic diagram of a charging voltage variation during a charging process of a device to be charged according to an embodiment of the present application;

fig. 2 is a schematic diagram of a charging current variation during a charging process of a device to be charged according to another embodiment of the present application;

fig. 3 is a schematic flow chart of a charging control method provided in an embodiment of the present application;

fig. 4 is a schematic flow chart of a charging control method according to another embodiment of the present application;

fig. 5 is a schematic block diagram of a charge control device provided in an embodiment of the present application;

FIG. 6 is a schematic block diagram of an electronic device provided by one embodiment of the present application;

fig. 7 is a schematic block diagram of a wired charging system provided in an embodiment of the present application;

fig. 8 is a schematic block diagram of a wired charging system provided in another embodiment of the present application;

fig. 9 is a schematic block diagram of a wireless charging system provided in one embodiment of the present application;

fig. 10 is a schematic structural diagram of a wireless charging system provided in another embodiment of the present application;

fig. 11 is a schematic structural diagram of a wireless charging system provided in another embodiment of the present application;

fig. 12 is a schematic structural diagram of a wireless charging system according to still another embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, not all, embodiments of the present application. All other embodiments that can be derived by a person skilled in the art from the embodiments given herein without making any creative effort shall fall within the protection scope of the present application.

For a clearer understanding of the present application, the working principle of charging will be described below to facilitate the subsequent understanding of the scheme of the present application. However, it should be understood that the following description is only for better understanding of the present application and should not be taken as limiting the present application in particular.

The charging process generally includes three phases: a trickle charge phase, a constant current charge phase and a constant voltage charge phase. The process of charging lithium ions is described as an example. Fig. 1a is a schematic diagram illustrating a change in a charging current of a device to be charged in a charging process according to an embodiment of the present application, and fig. 1b is a schematic diagram illustrating a change in a charging voltage of a device to be charged in a charging process according to an embodiment of the present application.

Wherein, during the period of time (0-t1), it can be trickle charging period, during which the charging current and the charging voltage are gradually increased at a smaller rate; when the charging voltage is greater than a certain voltage threshold, entering a constant current charging phase, i.e. in fig. 1 (period t1-t 2), during which time the device to be charged can be charged with a constant large current, e.g. 6.5A, during which the charging voltage gradually increases; when the charging voltage is greater than a certain voltage threshold, a constant voltage charging phase, i.e. the period (t2-t3) in fig. 1a and 1b, may be entered, during which time the charging current may gradually decrease until the charging is cut off, since the charge of the device to be charged is about to be fully charged.

As shown in fig. 2, a schematic diagram of charging current variation during charging of a device to be charged according to another embodiment of the present application may include a trickle charging phase, a fast charging phase, a predetermined constant current charging phase, and a normal charging phase. The fast charging stage and the preset constant current charging stage are both charging the device to be charged with a constant current, the charging current of the preset constant current charging stage is smaller than that of the fast charging stage, and the ordinary charging stage may be the constant voltage charging stage in fig. 1, so as to charge the device to be charged with a gradually decreasing charging current.

If the battery in the device to be charged is an aged battery or the ambient temperature of the device to be charged is low, for example, the ambient temperature is lower than-10 ℃, in this case, the internal resistance of the battery increases, the floating voltage (the voltage on the internal resistance of the battery) also increases, and thus the collected battery voltage is higher than the actual voltage of the battery. In other words, in the case of aging or low temperature of the battery, the amount of electricity of the battery at the end of the rapid charging phase is less than that in the normal case, and the remaining amount of electricity to be fully charged needs to continue constant current charging for a while. However, the collected battery voltage is high and cannot drop in a short time, so that the time of the preset constant-current charging stage is short, the time of entering the common charging stage is increased, and the charging efficiency is reduced.

Therefore, the embodiment of the application provides a charging method, which can reduce charging time and improve charging efficiency.

As used in the embodiments of the present application, the device to be charged may refer to a terminal, and the "terminal" may include, but are not limited to, devices configured to receive/transmit communication signals via a wireline connection (e.g., via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a Digital cable, a direct cable connection, and/or another data connection/Network) and/or via a Wireless interface (e.g., for a cellular Network, a Wireless Local Area Network (WLAN), a Digital television Network such as a Digital Video Broadcasting-Handheld (DVB-H) Network, a satellite Network, an Amplitude Modulation-Frequency Modulation (AM-FM) broadcast transmitter, and/or another communication terminal). Terminals that are arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals", and/or "mobile terminals".

Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communication System (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communication capabilities; personal Digital Assistants (PDAs) that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. In some embodiments, the device to be charged may refer to that the mobile terminal is a device or a handheld terminal device, such as a mobile phone, a pad, or the like. In some embodiments, the device to be charged mentioned in the embodiments of the present application may refer to a chip system, and in this embodiment, the battery of the device to be charged may or may not belong to the chip system.

In addition, the device to be charged can also include other devices to be charged that have the demand of charging, for example cell-phone, portable power source (for example, treasured charges, travel charge etc.), electric automobile, notebook computer, unmanned aerial vehicle, panel computer, electronic book, electron cigarette, intelligence device to be charged and small-size electronic product etc.. The intelligent to-be-charged device can comprise a watch, a bracelet, intelligent glasses, a sweeping robot and the like. Small electronic products may include, for example, wireless headsets, bluetooth speakers, electric toothbrushes, rechargeable wireless mice, and the like.

The charging control method 300 provided in the embodiment of the present application is described in detail below with reference to fig. 3.

As shown in fig. 3, the method 300 provided by the embodiment of the present application may include

steps

310 and 320.

310, in the process of charging the electronic device, controlling the electronic device to enter a multi-section second charging stage from a first charging stage, wherein the charging currents of the first charging stage and the multi-section second charging stage are constant currents, the charging currents of the multi-section second charging stage are smaller than the charging currents of the first charging stage, and the cut-off voltages and the charging currents of the multi-section second charging stage are sequentially reduced.

The first charging phase in the embodiment of the present application may be a phase in a fast charging mode, and for brevity, may be referred to as a fast charging phase herein; the multi-stage second charging stage may include three sub-charging stages or two sub-charging stages, which is not specifically limited in this application.

In the embodiment of the present application, the cut-off voltage of the multi-stage second charging stage can be sequentially reduced, and it is assumed that the multi-stage second charging stage includes three sub-charging stages, which are respectively: the first sub-charging stage, the second sub-charging stage and the third sub-charging stage. The cutoff voltage of the first sub-charging phase may be 4.35V, the cutoff voltage of the second sub-charging phase may be 4.30V, and the cutoff voltage of the third sub-charging phase may be 4.28V.

It is understood that the turn-off voltage of the multi-segment sub-charge is sequentially decreased, and the charging speed for the unaged battery and the battery at the normal temperature (e.g., the temperature of 0 to 50 deg.c) may not be substantially affected. Specifically, it is assumed that the cut-off voltages of the first sub-charging period, the second sub-charging period, and the third sub-charging period are 4.35V, 4.30V, and 4.28V, respectively. If the maximum charging voltage of the battery is 4.4V, when the measured battery voltage reaches 4.38V, the first sub-charging stage may be entered, at this time, since the battery is not aged or is in a normal temperature environment to charge the battery, the actual voltage of the battery may be 4.38V, therefore, after exiting the fast charging stage and entering the first sub-charging stage, the first sub-charging stage may exit immediately and enter the second sub-charging stage, since the voltage is still greater than the cut-off voltage of the second sub-charging stage, similarly, after entering the second sub-charging stage, the second sub-charging stage may exit immediately and enter the third sub-charging stage, similarly, after entering the third sub-charging stage, the third sub-charging stage may exit immediately and enter the normal charging stage, thereby completing charging of the battery.

In the embodiment of the present application, the charging current in the multi-stage second charging stage can also be reduced in sequence, and it is assumed that the multi-stage second charging stage includes three sub-charging stages, which are respectively: the first sub-charging stage, the second sub-charging stage and the third sub-charging stage. The charging current for the first sub-charging phase may be 0.8A, the charging current for the second sub-charging phase may be 0.5A, and the charging current for the third sub-charging phase may be 0.3A.

The numerical values in the embodiments of the present application are only examples, and other numerical values are also possible, and the present application is not particularly limited.

The method of the embodiment of the Application can be realized by an Application Processor (AP) and a Microcontroller (MCU) in the electronic device.

And 320, if the battery voltage and/or the charging current of the electronic equipment meet preset conditions in the last charging stage of the plurality of stages of second charging stages, controlling to exit the plurality of stages of second charging stages.

The last charging phase in the embodiment of the present application may be the third sub-charging phase mentioned above, that is, the sub-charging phase with the minimum cut-off voltage and/or minimum charging current in the multiple second charging phases.

After the electronic equipment is controlled to exit the multi-section second charging stage, the electronic equipment can be controlled to enter a common charging stage. The charging current of the ordinary charging phase in the embodiment of the present application may be a non-constant current, that is, starting from a certain current, the charging current charges the electronic device with a gradually decreasing current until the electronic device is fully charged.

Optionally, in some embodiments, the preset condition includes at least one of the following conditions: the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the last charging stage in the plurality of second charging stages, and the charging current of the electronic equipment is smaller than the charging current of the last charging stage in the plurality of second charging stages.

In the embodiment of the present application, it is assumed that the multi-stage second charging stage includes three sub-charging stages, which are respectively: the first sub-charging stage, the second sub-charging stage and the third sub-charging stage. The cutoff voltage of the first sub-charging phase may be 4.35V, the cutoff voltage of the second sub-charging phase may be 4.30V, and the cutoff voltage of the third sub-charging phase may be 4.28V. In the embodiment of the present application, the battery voltage of the electronic device is greater than or equal to the cut-off voltage of the last charging stage in the multiple second charging stages, that is, the battery voltage of the electronic device is greater than or equal to 4.28V.

In the embodiment of the present application, it is assumed that the charging current of the first sub-charging stage may be 0.8A, the charging current of the second sub-charging stage may be 0.5A, and the charging current of the third sub-charging stage may be 0.3A. In the embodiment of the present application, the charging current of the electronic device is smaller than the charging current of the last charging stage in the multiple second charging stages, that is, the charging current of the electronic device is smaller than 0.3A. If the charging current of the electronic device is less than 0.3A, the electronic device can be controlled to exit the third sub-charging stage and enter the ordinary charging stage.

It is noted above that the multi-stage second charging stage may include three sub-charging stages, or may include two sub-charging stages, and the following will specifically describe the three sub-charging stages as an example.

Optionally, in some embodiments, the controlling the electronic device to enter the multi-segment second charging segment from the first charging segment includes: if the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the first charging stage, controlling the electronic equipment to enter a first sub-charging stage of the multi-stage second charging stage from the first charging stage; if the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the first sub-charging stage and/or the charging current of the electronic equipment is smaller than the preset charging current of the first sub-charging stage, controlling the electronic equipment to enter a second sub-charging stage from the first sub-charging stage, wherein the charging current of the first sub-charging stage is greater than the charging current of the second sub-charging stage; and if the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the second sub-charging stage and/or the charging current of the electronic equipment is less than the preset charging current of the second sub-charging stage, controlling the electronic equipment to enter a third sub-charging stage from the second sub-charging stage, wherein the charging current of the second sub-charging stage is greater than the charging current of the third sub-charging stage.

The following description will be given taking as an example a condition satisfied by the battery voltage. In the embodiment of the present application, it is assumed that the cut-off voltage of the fast charging phase is 4.38V, and the cut-off voltages of the first sub-charging phase, the second sub-charging phase and the third sub-charging phase are 4.35V, 4.30V and 4.28V, respectively. If the maximum charging voltage of the battery is 4.40V, the charging current may start to be gradually increased to charge the battery in the trickle charging phase, and when the charging voltage reaches 1V, a fast charging phase may be entered, in which the battery may be charged with a large current, for example, the current for fast charging is 6.5A, and after the charging is continued for a while, when the measured battery voltage reaches 4.38V, the first sub-charging phase may be entered.

When the measured battery voltage reaches 4.38V, the actual voltage of the battery may be 4.35V, the voltage may drop back, that is, the battery is not charged within a short period of time, and if the battery is not charged within 10ms, the battery voltage drops back to 4.30V, a first sub-charging stage is entered, in this charging stage, the battery may be charged with a charging current of 0.8A, and after the battery is continuously charged for a period of time, the battery voltage is greater than the cut-off voltage of the first sub-charging by 4.35V, the first sub-charging stage may be exited, and the battery is ready to enter a second sub-charging stage for charging.

When the first sub-charging stage is cut off, the measured battery voltage is 4.35V, and the actual voltage of the battery may be 4.32V, and similarly, if the battery is not charged within 10ms, and the battery voltage may fall back to 4.25V, a second sub-charging stage is entered, in which the battery may be charged with a charging current of 0.5A, and after the battery is continuously charged for a period of time, the battery voltage is greater than the charging cut-off voltage of the second sub-charging by 4.30V, the second sub-charging process is exited, and the battery is ready to enter a third sub-charging stage for charging.

When the second sub-charging stage is cut off, the measured battery voltage is 4.30V, and the actual voltage of the battery may be 4.25V, and similarly, if the battery is not charged within 10ms and the battery voltage may fall back to 4.23V, a third sub-charging stage is entered, in which the battery may be charged with a charging current of 0.3A, and after the battery is continuously charged for a period of time, the battery voltage is greater than the charging cut-off voltage of the third sub-charging by 4.28V, the third sub-charging stage is exited, and the battery is ready to enter the normal charging stage for charging.

The preset condition satisfied by the charging voltage is taken as an example for explanation, and the preset condition of the charging current is taken as an example for explanation.

Assuming that the maximum charging voltage of the battery is 4.40V, in the trickle charging phase, the charging current may be gradually increased to charge the battery, and when the charging voltage reaches 1V, a fast charging phase is entered, in which the battery may be charged with a large current, for example, the current for fast charging is 6.5A, and after a period of continuous charging, when the measured battery voltage reaches 4.38V, the first sub-charging phase may be entered.

When the measured battery voltage reaches 4.38V, at which time the voltage may drop back, i.e. the battery is not charged for a short period of time, and assuming that the battery is not charged for 10ms, the battery voltage drops back to 4.30V, a first sub-charging phase is entered, in which the battery may be charged with a constant charging current of 0.8A, and after a period of charging, the charging current starts to drop, e.g. the charging current drops to 0.7A, i.e. the battery cannot be maintained to be charged with a charging current of 0.8A, the first sub-charging phase may be exited, and the battery is ready to enter a second sub-charging phase for charging.

When the first sub-charging phase is cut off, the measured battery voltage is 4.35V, and the actual voltage of the battery may be 4.30V, and similarly, if the battery is not charged within 10ms, and the battery voltage may fall back to 4.25V, a second sub-charging phase is entered, in which the battery may be charged with a charging current of 0.5A, and after the charging is continued for a while, the charging current starts to decrease, for example, the charging current decreases to 0.4A, that is, the battery cannot be charged with a charging current of 0.5A, and then the second sub-charging phase may be exited to prepare for entering a third sub-charging phase to charge the battery.

When the second sub-charging stage is cut off, the measured battery voltage is 4.30V, and the actual voltage of the battery may be 4.25V, and similarly, if the battery is not charged within 10ms, and the battery voltage may fall back to 4.23V, a third sub-charging stage is entered, in which the battery may be charged with a charging current of 0.3A, and after the charging is continued for a while, the charging current starts to decrease, that is, the battery cannot be charged with a charging current of 0.3A, the third sub-charging stage may be exited, and the battery is ready to enter the normal charging stage for charging.

The above numerical values in the embodiments of the present application are only examples, and other numerical values may be used, and the present application should not be particularly limited.

Optionally, in some embodiments, the method further comprises: after the electronic equipment is charged and stopped, the cut-off voltage and the cut-off current of the electronic equipment are set to preset values.

The stopping of charging the electronic device in the embodiment of the present application may include the charging of the electronic device being completed (or fully charged) or the charger being disconnected.

In the embodiment of the application, after the electronic device is charged for each time, the related cut-off voltage and cut-off current can be set to preset values, and the related cut-off voltage and cut-off current can be set to the cut-off voltage and the cut-off current in the normal charging mode. For example, assuming that the maximum charging voltage of the battery is 4.4V, the cutoff voltage in the normal charging mode may be set to 4.3V.

After the device to be charged is connected with the power supply device, whether the connected power supply device supports the quick charging mode or not may be recognized, if the quick charging mode is not supported, the device to be charged may be charged in a normal charging mode, that is, the device to be charged may be charged with a voltage and a current having a charging voltage of 5V and a charging current of 1A; if the fast charging mode is supported, the relevant parameters may be adjusted to the parameters in the fast charging mode, such as the cutoff voltage and the cutoff current of the fast charging, the cutoff voltage and the cutoff current of the first sub-charging stage, the second sub-charging stage, and the third sub-charging stage. Therefore, when the equipment to be charged is charged, the equipment to be charged can enter a fast charging mode after the trickle charging stage, and when the battery voltage and/or the charging current of the equipment to be charged reach the cut-off voltage and/or the cut-off current in the fast charging mode; the device to be charged can enter a first sub-charging stage for charging, and when the battery voltage and/or the charging current of the device to be charged reach the cut-off voltage and/or the cut-off current of the first sub-charging stage, the device to be charged can enter a second sub-charging stage for charging; when the battery voltage and/or the charging current of the equipment to be charged reach the cut-off voltage and/or the cut-off current of the second sub-charging stage, the equipment to be charged can enter a third sub-charging stage for charging; when the battery voltage and/or the charging current of the device to be charged reach the cutoff voltage and/or the cutoff current of the third sub-charging stage, the device to be charged can enter a common charging mode for charging until the charging is completed.

Optionally, in some implementations, the method further comprises: detecting an internal resistance of a battery of the electronic device; and if the internal resistance of the battery is larger than a preset threshold value, controlling to delay the time for entering the multi-section second charging stage from the first charging stage.

In the embodiment of the application, the device to be charged can include the AP and the MCU, wherein the AP can control the general charging process of the device to be charged, and the MCU can control the quick charging process of the device to be charged. If the MCU detects that the internal resistance of the battery is larger or the battery is at a lower environmental temperature, the device to be charged can be charged for a period of time again by using relatively smaller current and relatively higher cut-off voltage when the rapid charging process of the device to be charged is rapidly full, and the full time of the rapid charging process is delayed, so that the time of the common charging time is relatively shorter, the charging time can be reduced, and further, the charging efficiency can be improved.

For example, if the MCU detects that the internal resistance of the battery is high or at a low ambient temperature, the cut-off voltage of the fast charge phase may be increased, in which case the device to be charged may continue to recharge for a period of time at a relatively low current. Therefore, the time of the ordinary charging stage is relatively shorter, so that the charging time can be reduced, and further, the charging efficiency can be improved.

The preset threshold in the embodiment of the present application may be an internal resistance of the battery at normal temperature, or a resistance of the battery without aging, or may be a set value, which is not specifically limited in the present application.

For a better understanding of the solution of the present application, reference is made to fig. 4.

As shown in fig. 4, which is a schematic flow chart of a charging control method 400 provided in the embodiment of the present application, the method 400 may include steps 402-434.

402, whether the electronic device is connected to a power supply device.

If yes, go to step 404; if not, go to step 406.

404, reset the cutoff voltage and cutoff current.

406, enter Battery Charging (BC) 1.2 strategy.

The BC1.2 policy in the embodiment of the present application defines a mechanism for detecting, controlling and reporting a Universal Serial Bus (USB) port charge. These mechanisms are extensions of the USB2.0 specification for charging devices with dedicated chargers, hosts, and high current charging ports.

And 408, judging whether the power supply device is a special charger of the electronic equipment.

If yes, go to step 410; if not, go to step 422.

And 410, switching a switch.

And 412, judging whether to enter fast charging.

If yes, go to step 414; if not, go to step 416.

414, the fast charge thread is turned on.

And 416, opening the common charging thread.

418, determine if the fast charge is full.

If yes, go to step 420; if not, return to step 414.

The fast charge full flag is set 420.

And 422, judging whether the rapid charging is full.

If yes, go to step 424; if not, go back to step 424 to continue the determination.

424, the first sub-charging phase is turned on.

426, the first sub-charge phase cutoff voltage and charge current are set.

428, turn on the second sub-charging phase.

430, the second sub-charge phase cutoff voltage and the charge current are set.

432, the third sub-charging phase is turned on.

434, a third sub-charge phase cutoff voltage and a charge current are set.

The method embodiment of the present application is described in detail above with reference to fig. 1 to 4, and the apparatus embodiment of the present application is described in detail below with reference to fig. 5 to 12, and the apparatus embodiment and the method embodiment correspond to each other, so that the parts not described in detail can be referred to the previous method embodiments.

As shown in fig. 5, for a charging control device 500 provided in an embodiment of the present application, the device 500 may include a control unit 510.

The control unit 510 is configured to control the electronic device to enter a multi-stage second charging stage from a first charging stage in a process of charging the electronic device, where charging currents of the first charging stage and the second charging stage are constant currents, the charging currents of the multi-stage second charging stage are smaller than the charging currents of the first charging stage, and cutoff voltages and charging currents of the multi-stage second charging stage are sequentially reduced; and if the battery voltage and/or the charging current of the electronic equipment meet the preset conditions in the last charging stage of the plurality of stages of second charging stages, controlling to exit the plurality of stages of second charging stages.

Optionally, in some embodiments, the control unit 510 is further configured to: if the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the first charging stage, controlling the electronic equipment to enter a first sub-charging stage of the multi-stage second charging stage from the first charging stage; if the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the first sub-charging stage and/or the charging current of the electronic equipment is smaller than the preset charging current of the first sub-charging stage, controlling the electronic equipment to enter a second sub-charging stage from the first sub-charging stage, wherein the charging current of the first sub-charging stage is greater than the charging current of the second sub-charging stage; and if the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the second sub-charging stage and/or the charging current of the electronic equipment is less than the preset charging current of the second sub-charging stage, controlling the electronic equipment to enter a third sub-charging stage from the second sub-charging stage, wherein the charging current of the second sub-charging stage is greater than the charging current of the third sub-charging stage.

Optionally, in some embodiments, the apparatus 500 further comprises: the setting unit is used for setting the cut-off voltage and the cut-off current of the electronic equipment to preset values after the charging of the electronic equipment is stopped.

Optionally, in some embodiments, the apparatus 500 further comprises: a detection unit for detecting an internal resistance of a battery of the electronic device; the control unit 510 is further configured to: and if the internal resistance of the battery is larger than a preset threshold value, controlling to delay the time for entering the multi-section second charging stage from the first charging stage.

As shown in fig. 6, for an electronic device 600 provided in an embodiment of the present application, the device 600 may include a processor 610.

The processor 610 is configured to control the electronic device to enter a multi-stage second charging stage from a first charging stage in a process of charging the electronic device, where charging currents of the first charging stage and the multi-stage second charging stage are constant currents, the charging currents of the multi-stage second charging stage are smaller than the charging current of the first charging stage, and cutoff voltages and charging currents of the multi-stage second charging stage are sequentially reduced; and if the battery voltage and/or the charging current of the electronic equipment meet the preset conditions in the last charging stage of the plurality of stages of second charging stages, controlling to exit the plurality of stages of second charging stages.

Optionally, in some embodiments, the processor 610 is further configured to: if the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the first charging stage, controlling the electronic equipment to enter a first sub-charging stage of a multi-stage second charging stage from the first charging stage; if the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the first sub-charging stage and/or the charging current of the electronic equipment is smaller than the preset charging current of the first sub-charging stage, controlling the electronic equipment to enter a second sub-charging stage from the first sub-charging stage, wherein the charging current of the first sub-charging stage is greater than the charging current of the second sub-charging stage; and if the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the second sub-charging stage and/or the charging current of the electronic equipment is less than the preset charging current of the second sub-charging stage, controlling the electronic equipment to enter a third sub-charging stage from the second sub-charging stage, wherein the charging current of the second sub-charging stage is greater than the charging current of the third sub-charging stage.

Optionally, in some embodiments, the processor 610 is further configured to: after the electronic equipment is charged and stopped, the cut-off voltage and the cut-off current of the electronic equipment are set to preset values.

Optionally, in some embodiments, the processor 610 is further configured to: detecting an internal resistance of a battery of the electronic device; and if the internal resistance of the battery is larger than a preset threshold value, controlling to delay the time for entering the multi-section second charging stage from the first charging stage.

Embodiments of the present application also provide a computer-readable storage medium storing computer-executable instructions configured to perform any one of the charging

methods

300 or 400 described above.

Embodiments of the present application also provide a computer program product comprising a computer program stored on a computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform any of the above-described

charging methods

300 or 400.

The scheme of the embodiment of the application can be applied to a wired charging process and a wireless charging process, and the embodiment of the application is not particularly limited in this respect.

The wired charging process applied in the embodiment of the present application is described below with reference to fig. 7 to 8.

Fig. 7 is a schematic structural diagram of a charging system according to an embodiment of the present application. The charging system includes a power supply device 10, a battery management circuit 20, and a battery 30. The battery management circuit 20 may be used to manage the battery 30. The charge control device 500 and the electronic device 600 in the embodiment of the present application may include a battery management circuit 20 and a battery 30.

As an example, the battery management circuit 20 may manage a charging process of the battery 30, such as selecting a charging channel, controlling a charging voltage and/or a charging current, and the like; as another example, the battery management circuit 20 may manage the cells of the battery 30, such as equalizing the voltages of the cells in the battery 30.

The battery management circuit 20 may include a first charging channel 21 and a communication control circuit 23.

The first charging channel 21 is configured to receive a charging voltage and/or a charging current provided by the power supply apparatus 10, and apply the charging voltage and/or the charging current across the battery 30 to charge the battery 30.

The first charging path 21 may be, for example, a single conducting wire, or some other circuit devices unrelated to the conversion of the charging voltage and/or the charging current may be disposed on the first charging path 21. For example, the power management circuit 20 includes a first charging channel 21 and a second charging channel, and a switching device for switching between the charging channels may be disposed on the first charging channel 21 (see the description of fig. 8 in particular).

The power supply apparatus 10 may be the power supply apparatus with adjustable output voltage described above, but the embodiment of the present application does not specifically limit the type of the power supply apparatus 20. For example, the power supply device 20 may be a device dedicated to charging, such as an adapter and a power bank (power bank), or may be another device capable of providing power and data services, such as a computer.

The first charging channel 21 may be a direct charging channel, and the charging voltage and/or the charging current provided by the power adapter 10 may be directly applied to two ends of the battery 30. In order to implement the direct charging mode, the embodiment of the present application introduces a control circuit having a communication function, i.e., a communication control circuit 23, into the battery management circuit 20. The communication control circuit 23 may maintain communication with the power supply device 10 during the direct charging process to form a closed-loop feedback mechanism, so that the power supply device 10 can know the state of the battery in real time, and thus continuously adjust the charging voltage and/or the charging current injected into the first charging channel to ensure that the magnitude of the charging voltage and/or the charging current provided by the power supply device 10 matches the current charging stage of the battery 30.

For example, the communication control circuit 23 may communicate with the power supply apparatus 10 when the voltage of the battery 30 reaches a charge cutoff voltage corresponding to a constant current stage, so that the charging process of the battery 30 by the power supply apparatus 10 is switched from constant current charging to constant voltage charging. For another example, the communication control circuit 23 may communicate with the power supply apparatus 10 when the charging current of the battery 30 reaches a charging off current corresponding to a constant voltage stage, so that the charging process of the battery 30 by the power supply apparatus 10 is switched from constant voltage charging to constant current charging.

The battery management circuit provided by the embodiment of the application can directly charge the battery, in other words, the battery management circuit provided by the embodiment of the application is a battery management circuit supporting a direct charging architecture, and in the direct charging architecture, a conversion circuit is not required to be arranged on a direct charging channel, so that the heat productivity of the device to be charged in the charging process can be reduced.

Optionally, in some embodiments, as shown in fig. 8, the battery management circuit 20 may also include a second charging channel 24. The second charging path 24 is provided with a booster circuit 25. During the process that the power supply device 10 charges the battery 30 through the second charging channel 24, the voltage boost circuit 25 is configured to receive an initial voltage provided by the power supply device 10, boost the initial voltage to a target voltage, and charge the battery 30 based on the target voltage, wherein the initial voltage is smaller than the total voltage of the battery 30, and the target voltage is larger than the total voltage of the battery 30; the communication control circuit 23 may also be used to control switching between the first charging channel 21 and the second charging channel 24.

Assuming that the battery 30 includes multiple battery cells, the second charging channel 24 is compatible with a common power supply device to charge the battery 30, so as to solve the problem that the common power supply device cannot charge the multiple battery cells.

For a battery 30 comprising a plurality of cells, the battery management circuit 20 may further include an equalization circuit 22, and the equalization circuit 22 may be used to equalize voltages of the plurality of cells during a charging process and/or a discharging process of the battery, as described above.

The embodiment of the present application does not limit the specific form of the booster circuit 25. For example, a Boost circuit may be used, and a charge pump may be used for boosting. Alternatively, in some embodiments, the second charging channel 24 may adopt a conventional charging channel design manner, i.e., a conversion circuit (e.g., a charging IC) is disposed on the second charging channel 24. The conversion circuit can perform constant voltage and constant current control on the charging process of the battery 30, and adjust the initial voltage provided by the power supply device 10 according to actual needs, such as boosting or reducing. The embodiment of the present application can boost the initial voltage provided by the power supply device 10 to the target voltage by using the boosting function of the conversion circuit.

The communication control circuit 23 may implement switching between the first charging channel 21 and the second charging channel 24 by a switching device. Specifically, as shown in fig. 8, a switch Q5 may be disposed on the first charging channel 21, and when the communication control circuit 23 controls the switch Q5 to be turned on, the first charging channel 21 operates to directly charge the battery 30; when the communication control circuit 23 controls the switching tube Q5 to turn off, the second charging channel 24 operates, and the battery 30 is charged by using the second charging channel 24.

In other embodiments, a circuit or a device for voltage reduction may be disposed on the second charging channel 24, and the voltage reduction process may be performed when the voltage provided by the power supply device is higher than the required voltage of the battery 30. The circuit or module included in the second charging channel 24 is not limited in the embodiment of the present application.

The wireless charging process applied to the embodiment of the present application is described below with reference to fig. 9 to 12.

In a conventional wireless charging technology, a power supply device (e.g., an adapter) is generally connected to a wireless charging device (e.g., a wireless charging base), and output power of the power supply device is wirelessly transmitted (e.g., electromagnetic waves) to a device to be charged through the wireless charging device, so as to wirelessly charge the device to be charged. The device to be charged may be the electronic device described above.

According to different wireless charging principles, wireless charging methods are mainly classified into three methods, namely magnetic coupling (or electromagnetic induction), magnetic resonance and radio wave. Currently, the mainstream wireless charging standards include QI standard, power association (PMA) standard, and wireless power association (A4 WP). The QI standard and the PMA standard both adopt a magnetic coupling mode for wireless charging. The A4WP standard uses magnetic resonance for wireless charging.

Next, a wireless charging method according to an embodiment is described with reference to fig. 9.

As shown in fig. 9, the wireless charging system includes a power supply device 110, a transmitting device 120 of a wireless charging signal, and a charging control device 130, where the transmitting device 120 may be, for example, a wireless charging base, and the charging control device 130 may refer to the charging control apparatus 500 or the electronic apparatus 600 in this embodiment of the application.

After the power supply device 110 is connected to the transmitting device 120, the output voltage and the output current of the power supply device 110 are transmitted to the transmitting device 120.

The transmitting device 120 may convert the output voltage and the output current of the power supply device 110 into a wireless charging signal (e.g., an electromagnetic signal) through an internal wireless transmitting circuit 121 for transmission. For example, the wireless transmission circuit 121 may convert the output current of the power supply apparatus 110 into an alternating current, and convert the alternating current into a wireless charging signal through a transmission coil or a transmission antenna.

Fig. 9 is a schematic structural diagram of the wireless charging system, which is only exemplary, but the embodiment of the present application is not limited thereto. For example, the transmitting device 120 may also be referred to as a transmitting device of the wireless charging signal, and the charging control device 130 may also be referred to as a receiving device of the wireless charging signal. The receiving device of the wireless charging signal may be, for example, a chip having a function of receiving the wireless charging signal, and may receive the wireless charging signal transmitted by the transmitting device 120; the receiving device of the wireless charging signal may also be a device to be charged.

The charging control device 130 may receive the wireless charging signal transmitted by the wireless transmitting circuit 121 through the wireless receiving circuit 131, and convert the wireless charging signal into an output voltage and an output current of the wireless receiving circuit 131. For example, the wireless receiving circuit 131 may convert the wireless charging signal transmitted by the wireless transmitting circuit 121 into an alternating current through a receiving coil or a receiving antenna, and rectify and/or filter the alternating current to convert the alternating current into an output voltage and an output current of the wireless receiving circuit 131.

In some embodiments, the transmitting device 120 and the charging control device 130 may pre-negotiate the transmitting power of the wireless transmitting circuit 121 before wireless charging. Assuming that the power negotiated between the transmission device 120 and the charge control device 130 is 5W, the output voltage and the output current of the wireless reception circuit 131 are typically 5V and 1A. Assuming that the power that can be negotiated between the transmitting device 120 and the charging control device 130 is 10.8W, the output voltage and the output current of the wireless receiving circuit 131 are typically 9V and 1.2A.

If the output voltage of the wireless receiving circuit 131 is not suitable for being directly applied to the two terminals of the battery 133, it is necessary to perform constant voltage and/or constant current control through the converting circuit 132 in the charging control device 130 to obtain the charging voltage and/or charging current expected by the battery 133 in the charging control device 130.

The transformation circuit 132 may be configured to transform the output voltage of the wireless receiving circuit 131, so that the output voltage and/or the output current of the transformation circuit 132 meet the expected charging voltage and/or charging current requirement of the battery 133.

As an example, the transformation circuit 132 may be, for example, an Integrated Circuit (IC), or may be a power management circuit. During charging of the battery 133, the converter circuit 132 may be used to manage a charging voltage and/or a charging current of the battery 133. The conversion circuit 132 may include a voltage feedback function and/or a current feedback function to manage the charging voltage and/or charging current of the battery 133.

During normal charging, the charging voltage and/or charging current required by the battery may vary continuously during different charging phases. The output voltage and/or output current of the wireless receiving circuit may need to be continuously adjusted to meet the current charging requirements of the battery. For example, in the constant current charging stage of the battery, the charging current of the battery is kept constant during the charging process, but the voltage of the battery is continuously increased, so the charging voltage required by the battery is also continuously increased. As the required charging voltage of the battery increases, the required charging power of the battery also increases. When the charging power required by the battery is increased, the wireless receiving circuit needs to increase the output power to meet the charging requirement of the battery.

When the output power of the wireless receiving circuit is less than the charging power currently required by the battery, the communication control circuit may transmit indication information to the transmitting device to instruct the transmitting device to increase the transmitting power to increase the output power of the wireless receiving circuit. Therefore, in the charging process, the communication control circuit can communicate with the transmitting device, so that the output power of the wireless receiving circuit can meet the charging requirements of different charging stages of the battery.

The communication mode between the communication control circuit 235 and the transmitting device 220 is not specifically limited in the embodiment of the present application. Optionally, in some embodiments, the communication control circuit 235 and the transmitting device 220 may communicate using a wireless communication method such as bluetooth (bluetooth) communication, wireless fidelity (Wi-Fi) communication, backscatter (or power load modulation) communication, high carrier frequency-based short-range wireless communication, optical communication, ultrasonic communication, ultra-wideband communication, or mobile communication.

In one embodiment, the high carrier frequency based short-range wireless communication module may include an Integrated Circuit (IC) chip in which an Extremely High Frequency (EHF) antenna is packaged. Alternatively, the high carrier frequency may be 60 GHz.

In one embodiment, the optical communication may be communication using an optical communication module. The optical communication module may include an infrared communication module, and the infrared communication module may transmit information using infrared rays.

In one embodiment, the mobile communication may be communication using a mobile communication module. The mobile communication module can utilize a 5G communication protocol, a 4G communication protocol, a 3G communication protocol or other mobile communication protocols to carry out information transmission.

Compared with the mode of coupling the coil of the wireless receiving circuit to communicate in a signal modulation mode in the Qi standard, the wireless communication mode can improve the reliability of communication, and can avoid the voltage ripple caused by the communication in the signal coupling mode from influencing the voltage processing process of the voltage reduction circuit.

Optionally, the communication control circuit 235 and the transmitting device 220 may also communicate in a wired communication manner using a data interface.

Fig. 10 is another schematic diagram of a charging system provided in an embodiment of the present application. Referring to fig. 10, the transmitting device 220 of the wireless charging signal may further include a charging interface 223, and the charging interface 223 may be used to connect with the external power supply device 210. The wireless transmitting circuit 221 may further be configured to generate a wireless charging signal according to the output voltage and the output current of the power supply 210.

The first communication control circuit 222 may also adjust the amount of power that the wireless transmitting circuit 221 draws from the output power of the power supply 210 during the wireless charging process to adjust the transmitting power of the wireless transmitting circuit 221, so that the power transmitted by the wireless transmitting circuit can meet the charging requirement of the battery. For example, the power supply 210 may directly output a larger fixed power (e.g. 40W), and the first communication control circuit 222 may directly adjust the amount of power drawn by the wireless transmission circuit 221 from the fixed power supplied by the power supply 210.

In the embodiment of the present application, the output power of the power supply 210 may be fixed. For example, the power supply device 210 may directly output a large fixed power (e.g., 40W), and the power supply device 210 may provide an output voltage and an output current to the wireless charging device 220 according to the fixed output power. During the charging process, the first communication control circuit 222 may draw a certain amount of power from the fixed power of the power supply device for wireless charging according to actual needs. That is to say, in the embodiment of the present application, the control right of the transmission power adjustment of the wireless transmission circuit 221 is allocated to the first communication control circuit 222, and the first communication control circuit 222 can adjust the transmission power of the wireless transmission circuit 221 immediately after receiving the indication information sent by the second communication control circuit 235, so as to meet the current charging requirement of the battery.

The embodiment of the present application does not specifically limit the way in which the first communication control circuit 222 extracts the power amount from the maximum output power provided by the power supply device 210. For example, a voltage conversion circuit 224 may be disposed inside the transmitting device 220 of the wireless charging signal, and the voltage conversion circuit 224 may be connected to the transmitting coil or the transmitting antenna for adjusting the power received by the transmitting coil or the transmitting antenna. The voltage conversion circuit 224 may include, for example, a Pulse Width Modulation (PWM) controller and a switching unit. The first communication control circuit 222 may adjust the transmission power of the wireless transmission circuit 221 by adjusting the duty ratio of the control signal sent by the PWM controller.

The embodiment of the present application does not specifically limit the type of the power supply device 210. For example, the power supply device 210 may be an adapter, a power bank (power bank), a vehicle charger, or a computer.

The embodiment of the present application does not specifically limit the type of the charging interface 223. Alternatively, in some embodiments, the charging interface 223 may be a USB interface. The USB interface may be, for example, a USB2.0 interface, a micro USB interface, or a USB TYPE-C interface. Alternatively, in other embodiments, the charging interface 223 may also be a lightning interface, or any other type of parallel interface and/or serial interface capable of being used for charging.

The embodiment of the present application does not specifically limit the communication method between the first communication control circuit 222 and the power supply device 210. As an example, the first communication control circuit 222 may be connected to the power supply apparatus 210 through a communication interface other than the charging interface, and communicate with the power supply apparatus 210 through the communication interface. As another example, the first communication control circuit 222 may communicate with the power supply device 210 in a wireless manner. For example, the first Communication control circuit 222 may perform Near Field Communication (NFC) with the power supply device 210. As yet another example, the first communication control circuit 222 may communicate with the power supply device 210 through the charging interface 223 without providing an additional communication interface or other wireless communication module, which may simplify the implementation of the wireless charging device 220. For example, the charging interface 223 is a USB interface, and the first communication control circuit 222 may communicate with the power supply device 210 based on a data line (e.g., a D + and/or D-line) in the USB interface. For another example, the charging interface 223 may be a USB interface (e.g., a USB TYPE-C interface) supporting a Power Delivery (PD) communication protocol, and the first communication control circuit 222 and the Power supply device 210 may communicate based on the PD communication protocol.

Alternatively, the first communication control circuit 222 adjusting the transmission power of the wireless charging signal may mean that the first communication control circuit 222 adjusts the transmission power of the wireless charging signal by adjusting the input voltage and/or the input current of the wireless transmission circuit 221. For example, the first communication control circuit may increase the transmission power of the wireless transmission circuit by increasing the input voltage of the wireless transmission circuit.

Optionally, as shown in fig. 12, the device to be charged 230 further includes a first charging channel 233, and the battery 232 is charged by the first charging channel 233 by which the output voltage and/or the output current of the wireless receiving circuit 231 can be provided to the battery 232.

Optionally, a voltage conversion circuit 239 may be further disposed on the first charging channel 233, and an input end of the voltage conversion circuit 239 is electrically connected to an output end of the wireless receiving circuit 231, and is configured to perform constant voltage and/or constant current control on the output voltage of the wireless receiving circuit 231 to charge the battery 232, so that the output voltage and/or the output current of the voltage conversion circuit 239 matches the currently required charging voltage and/or charging current of the battery.

Alternatively, increasing the transmission power of the wireless transmission circuit 221 may refer to increasing the transmission voltage of the wireless transmission circuit 221, and increasing the transmission voltage of the wireless transmission circuit 221 may be achieved by increasing the output voltage of the voltage conversion circuit 224. For example, after the first communication control circuit 222 receives the instruction information instructing to increase the transmission power transmitted from the second communication control circuit 235, the transmission power of the wireless transmission circuit 221 may be increased by increasing the output voltage of the voltage conversion circuit 224.

The embodiment of the present application does not specifically limit the manner in which the second communication control circuit 235 sends the instruction information to the first communication control circuit 222.

For example, the second communication control circuit 235 may periodically transmit the instruction information to the first communication control circuit 222. Alternatively, the second communication control circuit 235 may transmit the instruction information to the first communication control circuit 222 only when the voltage of the battery reaches the charge cutoff voltage or the charge current of the battery reaches the charge cutoff current.

Optionally, the receiving device of the wireless charging signal may further include a detection circuit 234, the detection circuit 234 may detect a voltage and/or a charging current of the battery 232, and the second communication control circuit 235 may send indication information to the first communication control circuit 222 according to the voltage and/or the charging current of the battery 232, so as to instruct the first communication control circuit 222 to adjust an output voltage and an output current corresponding to the transmission power of the wireless transmission circuit 221.

In one embodiment, for a device to be charged, during the constant current charging, the voltage of the battery will continuously rise, and the charging power required by the battery will also increase accordingly. At this time, the transmission power of the wireless charging signal needs to be increased to meet the current charging requirement of the battery. During the constant voltage charging, the charging current of the battery may be continuously reduced, and the charging power required by the battery is also reduced. At this time, the transmission power of the wireless charging signal needs to be reduced to meet the current charging requirement of the battery.

The first communication control circuit 222 may adjust the transmission power of the wireless charging signal according to the indication information, and may refer to the first communication control circuit 222 to adjust the transmission power of the wireless charging signal so that the transmission power of the wireless charging signal matches the currently required charging voltage and/or charging current of the battery.

Matching the transmission power of the wireless transmission circuit 221 with the currently required charging voltage and/or charging current of the battery 232 may refer to: the first communication control circuit 222 configures the transmission power of the wireless charging signal such that the output voltage and/or the output current of the first charging channel 233 matches the charging voltage and/or the charging current currently required by the battery 232 (or, the first communication control circuit 222 configures the transmission power of the wireless charging signal such that the output voltage and/or the output current of the first charging channel 233 meets the charging requirement of the battery 232 (including the requirement of the battery 232 for the charging voltage and/or the charging current)).

It should be understood that in an embodiment of the present disclosure, "the output voltage and/or the output current of the first charging channel 232 matches the currently required charging voltage and/or charging current of the battery 232" includes: the voltage value and/or the current value of the dc power output by the first charging channel 232 is equal to or within a floating preset range (for example, the voltage value is floated from 100 mv to 200 mv, the current value is floated from 0.001A to 0.005A, etc.) required by the battery 232.

The above-mentioned second communication control circuit 235, performing wireless communication with the first communication control circuit 222 according to the voltage and/or the charging current of the battery 232 detected by the detection circuit 234, so that the first communication control circuit 222 adjusts the transmission power of the wireless transmission circuit 221 according to the voltage and/or the charging current of the battery 232 may include: in the constant current charging phase of the battery 232, the second communication control circuit 235 performs wireless communication with the first communication control circuit 222 according to the detected voltage of the battery, so that the first communication control circuit 222 adjusts the transmission power of the wireless transmission circuit 221, so that the output voltage of the first charging channel 233 matches the charging voltage required by the battery in the constant current charging phase (or, the output voltage of the first charging channel 233 meets the requirement of the battery 232 for the charging voltage in the constant current charging phase).

Fig. 11 is another example of a charging system provided in an embodiment of the present application. The transmitting device 220 of the wireless charging signal corresponding to the embodiment of fig. 11 does not obtain power from the power supply device 210, but directly converts an externally input alternating current (e.g., commercial power) into the wireless charging signal.

As shown in fig. 11, the transmitting device 220 of the wireless charging signal may further include a voltage converting circuit 224 and a power supply circuit 225. The power supply circuit 225 is operable to receive an externally input alternating current (e.g., mains power) and generate an output voltage and an output current of the power supply circuit 225 according to the alternating current. For example, the power supply circuit 225 may rectify and/or filter the ac power to obtain dc power or pulsating dc power, and transmit the dc power or pulsating dc power to the voltage conversion circuit 224.

The voltage conversion circuit 224 is configured to receive the output voltage of the power supply circuit 225 and convert the output voltage of the power supply circuit 225 to obtain the output voltage and the output current of the voltage conversion circuit 224. The wireless transmitting circuit 221 may also be configured to generate a wireless charging signal according to the output voltage and the output current of the voltage converting circuit 224.

According to the embodiment of the application, the function similar to the adapter is integrated in the transmitting device 220 of the wireless charging signal, so that the transmitting device 220 of the wireless charging signal does not need to obtain power from an external power supply device, the integration level of the transmitting device 220 of the wireless charging signal is improved, and the number of devices required by the wireless charging process is reduced.

Optionally, in some embodiments, the transmitting device 220 of the wireless charging signal may support a first wireless charging mode and a second wireless charging mode, and the charging speed of the device to be charged in the first wireless charging mode by the transmitting device 220 of the wireless charging signal is faster than the charging speed of the device to be charged in the second wireless charging mode by the transmitting device 220 of the wireless charging signal. In other words, the time for the transmitting apparatus 220 of the wireless charging signal operating in the first wireless charging mode to fully charge the battery of the device to be charged with the same capacity is shorter than the time for the transmitting apparatus 220 of the wireless charging signal operating in the second wireless charging mode.

The charging method provided by the embodiment of the present application may enable charging to be performed in the first charging mode, and may also enable charging to be performed in the second charging mode, which is not limited in the embodiment of the present application.

The second wireless charging mode may be referred to as a normal wireless charging mode, and may be, for example, a conventional wireless charging mode based on QI standard, PMA standard or A4WP standard. The first wireless charging mode may be a fast wireless charging mode. The normal wireless charging mode may refer to a wireless charging mode in which the transmitting power of the transmitting device 220 of the wireless charging signal is small (generally less than 15W, and the commonly used transmitting power is 5W or 10W), and it usually takes several hours to fully charge a battery with a large capacity (such as a battery with a capacity of 3000 ma hour) in the normal wireless charging mode; in the fast wireless charging mode, the transmission power of the transmitting device 220 of the wireless charging signal is relatively large (typically greater than or equal to 15W). Compared to the normal wireless charging mode, the charging time required for the transmitting device 220 of the wireless charging signal to fully charge the battery with the same capacity in the fast wireless charging mode can be significantly shortened and the charging speed is faster.

Referring to fig. 12, in an embodiment of the present disclosure, the device to be charged 230 further includes: and a second charging channel 236. The second charging channel 236 may be a wire. The second charging channel 236 may be provided with a converting circuit 237 for performing voltage control on the dc power output by the wireless receiving circuit 231 to obtain an output voltage and an output current of the second charging channel 236, so as to charge the battery 232.

In one embodiment, the transformation circuit 237 may be used as a voltage reduction circuit and output constant current and/or constant voltage power. In other words, the converting circuit 237 can be used to perform constant voltage and/or constant current control of the charging process of the battery.

When the second charging channel 236 is used to charge the battery 232, the wireless transmitting circuit 221 may transmit an electromagnetic signal with a constant transmitting power, and after the wireless receiving circuit 231 receives the electromagnetic signal, the wireless receiving circuit 231 processes the electromagnetic signal into a voltage and a current meeting the charging requirement of the battery 232 through the converting circuit 237 and inputs the voltage and the current into the battery 232, so as to charge the battery 232. It should be understood that in some embodiments, a constant transmit power need not be a transmit power that remains completely constant, and may vary within a range, for example, a transmit power of 7.5W floating up or down by 0.5W.

In the embodiment of the present disclosure, the charging manner for charging the battery 232 through the first charging channel 233 is a first wireless charging mode, and the manner for charging the battery 232 through the second charging channel 236 is referred to as a second wireless charging mode. The transmitting means of the wireless charging signal and the device to be charged may determine whether to charge the battery 232 in the first wireless charging mode or the second wireless charging mode through handshake communication.

In the embodiment of the present disclosure, for the transmitting apparatus of the wireless charging signal, when the device to be charged is charged through the first wireless charging mode, the maximum transmission power of the wireless transmitting circuit 221 may be the first transmission power value. When the device to be charged is charged in the second wireless charging mode, the maximum transmission power of the wireless transmission circuit 221 may be a second transmission power value. The first transmission power value is larger than the second transmission power value, so that the charging speed of the device to be charged in the first wireless charging mode is larger than that in the second wireless charging mode.

Optionally, the second communication control circuit 235 may also be used to control switching between the first charging channel 233 and the second charging channel 236. For example, as shown in fig. 12, a switch 238 may be disposed on the first charging channel 233, and the second communication control circuit 235 may control the switching between the first charging channel 233 and the second charging channel 236 by controlling the on and off of the switch 238. As indicated above, in some embodiments, the transmitting means 220 of the wireless charging signal may include a first wireless charging mode and a second wireless charging mode, and the charging speed of the apparatus to be charged 230 by the transmitting means 220 of the wireless charging signal in the first wireless charging mode is faster than the charging speed of the apparatus to be charged 230 by the transmitting means 220 of the wireless charging signal in the second wireless charging mode. When the transmitting device 220 of the wireless charging signal charges the battery in the device to be charged 230 using the first wireless charging mode, the device to be charged 230 may control the first charging channel 233 to operate; when the transmitting device 220 of the wireless charging signal charges the battery in the device to be charged 230 using the second wireless charging mode, the device to be charged 230 may control the second charging channel 236 to operate.

On the device to be charged side, the second communication control circuit 235 can switch between the first charging path 233 and the second charging path 236 according to the charging mode. When the first wireless charging mode is adopted, the second communication control circuit 235 controls the voltage conversion circuit 239 on the first charging channel 233 to operate. When the second wireless charging mode is adopted, the second communication control circuit 235 controls the conversion circuit 237 on the second charging channel 236 to operate.

Alternatively, the transmitting means 220 of the wireless charging signal may communicate with the device to be charged 230 to negotiate a charging mode between the transmitting means 220 of the wireless charging signal and the device to be charged 230.

In addition to the communication contents described above, many other communication information may be exchanged between the first communication control circuit 222 in the transmitting apparatus 220 of the wireless charging signal and the second communication control circuit 235 in the device to be charged 230. In some embodiments, information for safety protection, abnormality detection, or fault handling, such as temperature information of the battery 232, information indicating overvoltage protection or overcurrent protection, and power transfer efficiency information (which may be used to indicate power transfer efficiency between the wireless transmitting circuit 221 and the wireless receiving circuit 231) may be exchanged between the first communication control circuit 222 and the second communication control circuit 235.

Optionally, the communication between the second communication control circuit 235 and the first communication control circuit 222 may be a unidirectional communication or a bidirectional communication, which is not specifically limited in this embodiment of the present application.

In the embodiment of the present application, the function of the second communication control circuit may be implemented by the application processor of the device to be charged 230, and thus, hardware cost may be saved. Alternatively, the control may be realized by an independent control chip, and the reliability of the control may be improved by realizing the control by the independent control chip.

Optionally, in the embodiment of the present application, the wireless receiving circuit 232 and the voltage converting circuit 239 may be integrated in the same wireless charging chip, so that the integration level of the device to be charged may be improved, and the implementation of the device to be charged is simplified. For example, the functionality of a conventional wireless charging chip may be extended to support charging management functions.

In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware or any other combination. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., Digital Video Disk (DVD)), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

As used in this application, although the terms "first," "second," etc. may be used in this application to describe various apparatus, these apparatus should not be limited by these terms. These terms are only used to distinguish one device from another. For example, a first device may be called a second device, and likewise, a second device may be called a first device, without changing the meaning of the description, so long as all occurrences of the "first device" are renamed consistently and all occurrences of the "second device" are renamed consistently. The first device and the second device are both devices, but may not be the same device.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A charge control method for an electronic device, the method comprising:

in the process of charging the electronic equipment, controlling the electronic equipment to enter a multi-section second charging stage from a first charging stage, wherein the charging currents of the first charging stage and the second charging stage are constant currents, the charging currents of the multi-section second charging stage are smaller than the charging current of the first charging stage, the cut-off voltage and the charging current of the multi-section second charging stage are sequentially reduced, and the first charging stage is a quick charging stage;

if the last charging stage of the multiple second charging stages meets the preset conditions, the electronic equipment is controlled to exit the multiple second charging stages and enter a common charging stage, the charging current of the common charging stage is non-constant current, and the electronic equipment is controlled to be charged by the charging current which gradually decreases in the common charging stage until the electronic equipment is fully charged.

2. The method according to claim 1, wherein the preset condition comprises at least one of the following conditions:

the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the last charging stage in the plurality of second charging stages, and the charging current of the electronic equipment is smaller than the charging current of the last charging stage in the plurality of second charging stages.

3. The method of claim 1 or 2, wherein said controlling the electronic device to enter a multi-segment second charging phase from a first charging phase comprises:

if the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the first charging stage, controlling the electronic equipment to enter a first sub-charging stage of the multi-stage second charging stage from the first charging stage;

if the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the first sub-charging stage and/or the charging current of the electronic equipment is smaller than the preset charging current of the first sub-charging stage, controlling the electronic equipment to enter a second sub-charging stage from the first sub-charging stage, wherein the charging current of the first sub-charging stage is greater than the charging current of the second sub-charging stage;

and if the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the second sub-charging stage and/or the charging current of the electronic equipment is less than the preset charging current of the second sub-charging stage, controlling the electronic equipment to enter a third sub-charging stage from the second sub-charging stage, wherein the charging current of the second sub-charging stage is greater than the charging current of the third sub-charging stage.

4. The method of claim 1, further comprising:

after the electronic equipment is charged and stopped, the cut-off voltage and the cut-off current of the electronic equipment are set to preset values.

5. The method of claim 1, further comprising:

detecting an internal resistance of a battery of the electronic device;

and if the internal resistance of the battery is larger than a preset threshold value, controlling to delay the time for entering the multi-section second charging stage from the first charging stage.

6. A charge control device, characterized in that the charge control device comprises:

the control unit is used for controlling the electronic equipment to enter a multi-section second charging stage from a first charging stage in the process of charging the electronic equipment, the charging currents of the first charging stage and the second charging stage are constant currents, the charging currents of the multi-section second charging stage are smaller than the charging currents of the first charging stage, the cut-off voltage and the charging currents of the multi-section second charging stage are sequentially reduced, and the first charging stage is a quick charging stage;

7. The charge control device according to claim 6, wherein the preset condition includes at least one of the following conditions:

8. The charge control device according to claim 6 or 7, wherein the control unit is further configured to:

9. The charge control device according to claim 6, characterized in that the charge control device further comprises:

the setting unit is used for setting the cut-off voltage and the cut-off current of the electronic equipment to preset values after the charging of the electronic equipment is stopped.

10. The charge control device according to claim 6, characterized in that the charge control device further comprises:

a detection unit for detecting an internal resistance of a battery of the electronic device;

the control unit is further configured to: and if the internal resistance of the battery is larger than a preset threshold value, controlling to delay the time for entering the multi-section second charging stage from the first charging stage.

11. An electronic device, characterized in that the electronic device comprises:

the processor is used for controlling the electronic equipment to enter a multi-section second charging stage from a first charging stage in the process of charging the electronic equipment, the charging currents of the first charging stage and the multi-section second charging stage are constant currents, the charging currents of the multi-section second charging stage are smaller than the charging currents of the first charging stage, the cut-off voltages and the charging currents of the multi-section second charging stage are sequentially reduced, and the first charging stage is a quick charging stage;

12. The electronic device of claim 11, wherein the preset condition comprises at least one of the following conditions:

13. The electronic device of claim 11 or 12, wherein the processor is further configured to:

if the battery voltage of the electronic equipment is greater than or equal to the cut-off voltage of the first charging stage, controlling the electronic equipment to enter a first sub-charging stage of a multi-stage second charging stage from the first charging stage;

14. The electronic device of claim 11, wherein the processor is further configured to:

15. The electronic device of claim 11, wherein the processor is further configured to:

detecting an internal resistance of a battery of the electronic device;

16. A computer-readable storage medium storing computer-executable instructions configured to perform the method of any one of claims 1 to 5.