CN116632950A

CN116632950A - Battery equalization method, apparatus and readable storage medium

Info

Publication number: CN116632950A
Application number: CN202210126431.7A
Authority: CN
Inventors: 席利根
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-02-10
Filing date: 2022-02-10
Publication date: 2023-08-22

Abstract

The present disclosure relates to a battery equalization method, apparatus, and readable storage medium. The method comprises the following steps: when a battery is in a target working mode, acquiring current electric quantity information of the battery; determining whether the battery meets a preset condition to be balanced or not according to the current electric quantity information; under the condition that the battery meets the condition to be balanced, adjusting a current threshold parameter for determining the working mode of the battery so as to enable the battery to be in a standing mode; and under the condition that the battery is in a standing mode, controlling a target battery cell in the battery to start electric quantity balance. Therefore, the limitation of battery electric quantity equalization is eliminated, battery electric quantity jumping is avoided, and the use experience of a user is improved. In addition, the current threshold parameter is adjusted under the condition that the preset condition to be balanced is met, so that the workload for adjusting the current threshold parameter is effectively reduced.

Description

Battery equalization method, apparatus and readable storage medium

Technical Field

The disclosure relates to the technical field of batteries, and in particular relates to a battery equalization method, a battery equalization device and a readable storage medium.

Background

With rapid development of mobile phone charging, the use of a battery including multiple (e.g., two) cells in mobile phones has also been popular. However, under the influence of the differences of the capacity, the internal resistance, the self-discharge, the temperature distribution gradient of the whole machine and the like of the battery cells, the condition of inconsistent voltage of different battery cells in the charging and discharging process is easy to occur, the inconsistent voltage also easily causes the overcharge and the overdischarge of the battery cells, the usable capacity of the battery is limited, and the cycle life of the battery is seriously influenced.

In the adaptation to the complete machine, in order to alleviate or eliminate the voltage inconsistency between the cells in the battery, the cells usually have an equalization function, for example, the current TI electricity meter commonly used in mobile terminals can realize the electricity equalization of the cells. However, the current fuel gauge has an equalization function only when the battery is in a charging mode or a standing mode, and cannot perform equalization when the battery is in a discharging mode. Therefore, the condition that the voltages of different battery cells are inconsistent easily in the discharging process can be caused, and particularly, the voltage inconsistency of the battery cells is more obvious at the end of discharging. And inconsistent voltage of the battery cells generally causes a certain battery cell to discharge to a cut-off voltage (for example, 3.4V) of the electricity meter, triggers an electricity meter electricity quantity reporting 0 mechanism, causes electricity quantity to jump, and causes the mobile terminal to be turned off suddenly, thereby affecting the use experience of users.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides a battery equalization method, apparatus, and readable storage medium.

According to a first aspect of embodiments of the present disclosure, there is provided a battery equalization method, including:

when a battery is in a target working mode, acquiring current electric quantity information of the battery;

Determining whether the battery meets a preset condition to be balanced or not according to the current electric quantity information;

under the condition that the battery meets the condition to be balanced, adjusting a current threshold parameter for determining a battery working mode so as to enable the battery to be in a standing mode; and

and under the condition that the battery is in the standing mode, controlling a target battery cell in the battery to start electric quantity balance.

Optionally, the current threshold parameter comprises a resting current threshold; and under the condition that the battery meets the condition to be balanced, adjusting a current threshold parameter for determining a battery working mode, wherein the current threshold parameter comprises the following steps:

acquiring the current of the battery under the condition that the battery meets the condition to be balanced;

and adjusting the standing current threshold according to the current.

Optionally, said adjusting the rest current threshold according to the present current includes:

and increasing the standing current threshold value to enable the increased standing current threshold value to be N times of the current, wherein N is greater than 1.

Optionally, the current threshold parameter further includes a charge current threshold and a discharge current threshold;

and under the condition that the battery meets the condition to be balanced, adjusting a current threshold parameter for determining a battery working mode, and further comprising:

Acquiring an initial rest current threshold, an initial charging current threshold and an initial discharging current threshold, and determining a first difference value between the initial charging current threshold and the initial rest current threshold and a second difference value between the initial discharging current threshold and the initial rest current threshold;

and adjusting the charging current threshold according to the adjusted standing current threshold and the first difference value, and adjusting the discharging current threshold according to the adjusted standing current threshold and the second difference value.

Optionally, the method further comprises:

reducing the equalization opening threshold under the condition that the battery meets the condition to be equalized, so as to obtain a new equalization opening threshold;

and under the condition that the battery is in the standing mode, controlling a target battery cell in the battery to start electric quantity balance, wherein the method comprises the following steps of:

and controlling a target cell in the battery to start electric quantity balance under the condition that the working mode of the battery is the standing mode and the current state of charge of the battery is greater than or equal to the new balance starting threshold value.

Optionally, the current electric quantity information includes a current state of charge and a current voltage of each cell; the condition to be equalized includes that the current state of charge is less than or equal to a state of charge threshold, and a maximum differential pressure between the cells is greater than or equal to a first differential pressure threshold.

Optionally, when the working mode of the battery is the standing mode, controlling the target battery cell in the battery to open electric quantity balance includes:

under the condition that the working mode of the battery is the standing mode, determining the cell with the maximum current voltage as a target cell;

and controlling the target battery cell to open dissipative equalization.

Optionally, the method further comprises:

acquiring the charge and discharge cycle times of the battery;

determining a target circulation number corresponding to the first pressure difference threshold according to the first pressure difference threshold and the corresponding relation between the preset pressure difference threshold and the circulation number;

when the battery is in the target working mode, acquiring current electric quantity information of the battery comprises the following steps:

and when the battery is in a target working mode and the charge and discharge cycle times reach the target cycle times, acquiring current electric quantity information of the battery.

Optionally, the method further comprises:

after the target battery cell starts electric quantity equalization, when the voltage difference between the target battery cell and the battery cell with the smallest current voltage is smaller than or equal to a second voltage difference threshold value, controlling the target battery cell to terminate electric quantity equalization; and

And adjusting the current threshold parameter to be an initial current threshold parameter.

According to a second aspect of embodiments of the present disclosure, there is provided a battery equalization apparatus, comprising:

the first acquisition module is configured to acquire current electric quantity information of the battery when the battery is in a target working mode;

the first determining module is configured to determine whether the battery meets a preset condition to be balanced according to the current electric quantity information;

the first adjusting module is configured to adjust a current threshold parameter used for determining a battery working mode so as to enable the battery to be in a standing mode under the condition that the battery meets the condition to be balanced; and

and the first control module is configured to control a target battery cell in the battery to start electric quantity balance under the condition that the battery is in the standing mode.

Optionally, the current threshold parameter comprises a resting current threshold; the first adjustment module includes:

the first acquisition submodule is configured to acquire the current of the battery under the condition that the battery meets the condition to be balanced;

a first adjustment sub-module configured to adjust the resting current threshold according to the present current.

Optionally, the first adjustment sub-module is configured to: and increasing the standing current threshold value to enable the increased standing current threshold value to be N times of the current, wherein N is greater than 1.

Optionally, the current threshold parameter further includes a charge current threshold and a discharge current threshold; the first adjustment module further includes:

a second acquisition sub-module configured to acquire an initial rest current threshold, an initial charge current threshold, and an initial discharge current threshold, and determine a first difference of the initial charge current threshold and the initial rest current threshold, and a second difference of the initial discharge current threshold and the initial rest current threshold;

and the second adjusting submodule is configured to adjust the charging current threshold according to the adjusted standing current threshold and the first difference value and adjust the discharging current threshold according to the adjusted standing current threshold and the second difference value.

Optionally, the apparatus further comprises:

a reducing module configured to reduce an equalization on threshold to obtain a new equalization on threshold if the battery satisfies the condition to be equalized;

The first control module includes:

and the first control submodule is configured to control a target cell in the battery to start electric quantity equalization under the condition that the working mode of the battery is the standing mode and the current state of charge of the battery is greater than or equal to the new equalization start threshold value.

Optionally, the first control module includes:

a determining submodule configured to determine a cell having a maximum current voltage as a target cell in a case where an operation mode of the battery is the stationary mode;

and a second control sub-module configured to control the target cell to open dissipative equalization.

Optionally, the apparatus further comprises:

a second acquisition module configured to acquire the number of charge-discharge cycles of the battery;

the second determining module is configured to determine a target circulation number corresponding to the first pressure difference threshold according to the first pressure difference threshold and a preset corresponding relation between the pressure difference threshold and the circulation number;

The first acquisition module includes:

and the third acquisition sub-module is configured to acquire the current electric quantity information of the battery when the battery is in a target working mode and the charge and discharge cycle times reach the target cycle times.

Optionally, the apparatus further comprises:

the second control module is configured to control the target battery cell to terminate the electric quantity equalization when the voltage difference between the target battery cell and the battery cell with the smallest current voltage is smaller than or equal to a second voltage difference threshold value after the electric quantity equalization is started by the target battery cell; and

and a second adjustment module configured to adjust the current threshold parameter to an initial current threshold parameter.

According to a third aspect of embodiments of the present disclosure, there is provided a battery equalization apparatus, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to:

According to a fourth aspect of embodiments of the present disclosure, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the battery balancing method provided by the first aspect of the present disclosure.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:

by adopting the technical scheme, under the condition that the battery meets the preset condition to be balanced, the current threshold parameter for determining the working mode of the battery is adjusted so that the battery is in a standing mode, and then the target battery core in the battery is controlled to start electric quantity balancing, so that the working mode which cannot be subjected to electric quantity balancing can be adjusted to the working mode which can be subjected to electric quantity balancing by adjusting the current threshold parameter, the limitation on the electric quantity balancing of the battery is eliminated, the jump of the electric quantity of the battery is avoided, and the use experience of a user is improved. In addition, the current threshold parameter is adjusted under the condition that the preset condition to be balanced is met, so that the workload for adjusting the current threshold parameter is effectively reduced.

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

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram showing a structure of an electricity meter for balancing electricity according to an exemplary embodiment.

Fig. 2 is a flow chart illustrating a method of battery equalization according to an exemplary embodiment.

Fig. 3 is a graph illustrating a current curve according to an exemplary embodiment.

Fig. 4 is a flowchart illustrating another battery equalization method according to an exemplary embodiment.

Fig. 5 is a flowchart illustrating an adjustment of a current threshold parameter according to an exemplary embodiment.

Fig. 6 is a flowchart illustrating another battery equalization method according to an exemplary embodiment.

Fig. 7 is a block diagram illustrating a battery equalization apparatus according to an exemplary embodiment.

Fig. 8 is a block diagram illustrating a battery equalization apparatus according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

Fig. 1 is a schematic diagram showing a structure of an electricity meter for balancing electricity according to an exemplary embodiment. As shown in fig. 1, the battery includes a cell B1 and a cell B2, and the protection chip IC and the Host may communicate through a communication line SCL and a communication line SDA. In fig. 1, the switch Qchg is a charge control switching tube for controlling whether to charge the battery, and is turned off to terminate the charging in the event of a charging abnormality (e.g., charging overvoltage, overcurrent). The switch Qdsg is a discharge control switch tube for controlling whether the battery is discharged or not, and is turned off to terminate the discharge when the discharge is abnormal (e.g., discharge under-voltage, over-current). The resistor Rs is a current sampling resistor and is used for collecting battery current.

In fig. 1, when the battery is in a stationary mode, the electricity meter reads the voltage of the battery cell B1 and the voltage of the battery cell B2, and judges whether to perform electricity equalization or not according to the voltage difference between the two battery cells. Assuming that the electric quantity balancing is required and the voltage of the battery cell B1 is greater than the voltage of the battery cell B2, it is determined that the electric quantity balancing is required for the battery cell B1. Illustratively, closing switch Q1 performs dissipative equalization by resistors Rext1 and Rext 2.

In the related art, when the electricity meter performs the balancing function, the configuration of the register parameters is relied on, that is, whether the electricity meter is balanced or not is determined according to the initial parameter configuration, and the Host does not actively participate in the dynamic adjustment of the electricity meter balance in the whole process. Therefore, the battery power balance is limited, and particularly when the voltage difference between two battery cores is larger at the end of the discharge, if the power balance cannot be performed, a certain battery core can be firstly discharged to the cut-off voltage of the electricity meter, a power meter power reporting 0 mechanism is triggered, the battery power is caused to jump, and the mobile terminal is suddenly powered off, so that the use experience of a user is affected.

In view of this, the disclosure provides a battery equalization method, apparatus and readable storage medium, so as to eliminate limitation on battery equalization, avoid battery power jump, and promote user experience.

Fig. 2 is a flowchart illustrating a battery equalization method according to an exemplary embodiment, including the following steps, as shown in fig. 2.

In step S21, when the battery is in the target operation mode, current charge information of the battery is acquired.

In one embodiment, the target operating modes may include a charge mode, a discharge mode, and a rest mode of the battery. However, considering that the power-on voltage of the electronic device is 3.6V, which is 3.4V greater than the cut-off voltage of the fuel gauge, that is, the voltage of the battery cell is greater than 3.6V at the initial stage of charging, so that no jump occurs in the battery level during charging, in another embodiment, the target operation mode may include a discharge mode, or include a discharge mode and a rest mode.

In step S22, it is determined whether the battery satisfies a preset condition to be equalized according to the current power information.

In step S23, in the case where the battery satisfies the condition to be equalized, a current threshold parameter for determining the battery operation mode is adjusted so that the battery is in the stationary mode.

In the present disclosure, the operating mode of the battery is determined by a current threshold parameter. Illustratively, a coulometer is used as an example. The fuel gauge may be used to meter the battery charge, typically including residual capacity (RM), full Charge Capacity (FCC), percent capacity (SOC), voltage, current, temperature, etc. For example, in the present disclosure, the operating mode of the battery may be determined by the current.

The battery operating modes include a charging mode, a discharging mode, and a rest mode. Accordingly, the current threshold parameters may include a rest current threshold, a charge current threshold, and a discharge current threshold. Wherein table 1 is the initial current threshold parameters and other parameters set in the electricity meter. In general, the operation mode of the battery can be determined with the parameters shown in table 1.

Threshold value of discharge current	150mA
		Charging current threshold	120mA
Stationary current threshold	100mA
		Discharge delay time	1s
Charge delay time	60s
		Equalization on threshold	80％

Referring to fig. 3, fig. 3 is a graph illustrating a current curve according to an exemplary embodiment. As shown in fig. 3, the battery is determined to be in the charging mode when the current is positive and the current is greater than or equal to the charging current threshold, and the battery is determined to be in the discharging mode when the current is negative and the absolute value of the current is greater than or equal to the discharging current threshold. And determining that the battery is in a static state when the current is positive and the duration time of the current being less than or equal to the static current threshold is longer than the charge delay time, or when the current is negative and the absolute value of the current being less than or equal to the duration time of the static current threshold is longer than the discharge delay time.

In this way, the host can switch the battery operation mode from the discharge state to the rest state or maintain the battery operation mode in the rest state by adjusting the current threshold parameter used to determine the battery operation mode. The adjustment process of the current threshold parameter will be described in detail below, and will not be described herein.

In step S24, in the case where the battery is in the stationary mode, the target cell in the battery is controlled to turn on the equalization of the electric quantity.

The values illustrate that the electricity meter includes a function module for balancing the electricity. After the battery is in the stationary mode by adjusting the current threshold parameter in step S23, the target cell in the battery is controlled to start the electric quantity equalization.

In order to facilitate a better understanding of the battery equalization method provided by the present disclosure, a complete embodiment of the method is described below.

Optionally, in step S21 in fig. 2, the obtained current charge information of the battery may include a current state of charge and a current voltage of each cell. Accordingly, the condition to be equalized includes that the current state of charge is less than or equal to the state of charge threshold, and the maximum voltage difference between the cells is greater than or equal to the first voltage difference threshold. Wherein the state of charge threshold may be 10%, and so on. The voltage difference between the battery cells is positive.

The values illustrate that in this disclosure, a battery includes at least two cells. When the battery comprises two electric cores, the maximum voltage difference between the electric cores is recorded as the voltage difference between the two electric cores, and when the number of the electric cores included in the battery is larger than two, the maximum voltage difference between the electric cores is the voltage difference between the electric core with the maximum voltage and the electric core with the minimum voltage.

Therefore, under the condition that the target working mode is the discharging mode, the purpose of balancing the electric quantity of the battery in the battery discharging mode can be achieved through the to-be-balanced condition, and the problems of battery electric quantity jump and electric quantity reduction caused by the electric quantity jump in the discharging mode are solved.

In practical applications, considering that the current threshold parameter and/or the balance start threshold of the battery is adjusted once every charge-discharge cycle, the workload of adjustment and the workload of electric quantity balance are increased. Therefore, in one embodiment, the adjustment of the current threshold parameter and/or the balance start threshold may be performed once after the charge and discharge cycle is performed multiple times, and then the electric quantity balancing may be performed once after the charge and discharge cycle is performed multiple times.

For example, as shown in fig. 4, the battery equalization method may further include the following steps.

In step S41, the number of charge-discharge cycles of the battery is acquired. Illustratively, the host computer obtains the charge-discharge Cycle Count from the fuel gauge via IIC (Inter-Integrated Circuit, integrated circuit bus) communication. Wherein, the battery performs one charge and one discharge, which is recorded as one charge and discharge cycle.

In step S42, the target cycle number corresponding to the first differential pressure threshold is determined according to the first differential pressure threshold and the preset correspondence between the differential pressure threshold and the cycle number.

Wherein, the corresponding relation between the pressure difference threshold and the circulation times is preset, and table 2 is the corresponding relation between the pressure difference threshold and the circulation times, wherein, vth represents the pressure difference threshold. As shown in table 2, the larger the pressure difference threshold, the smaller the corresponding number of cycles, i.e., the greater the frequency of charge equalization.

Differential pressure threshold	Number of cycles
		200<Vth	5
100<Vth≤200	8
		50<Vth≤100	12
Vth≤50	20

Accordingly, step S21 may include step S211.

In step S211, when the battery is in the target operation mode and the number of charge/discharge cycles reaches the target number of cycles, current charge information of the battery is obtained.

After that, step S22 to step S24 are performed again.

By adopting the technical scheme, under the condition that the charge and discharge cycle times reach the target cycle times, current threshold parameter adjustment and electric quantity equalization starting are executed. And, the target cycle number may be adjusted according to the first pressure difference threshold value such that the larger the first pressure difference threshold value is, the smaller the target cycle number is, that is, the more the number of electric quantity equalization is. Therefore, the jump of the battery electric quantity can be avoided, the use experience of a user is improved, and the workload can be effectively reduced.

Fig. 5 is a flowchart illustrating an adjustment of a current threshold parameter according to an exemplary embodiment. As shown in fig. 5, step S23 in fig. 2 may include the following steps.

In step S231, in the case where the battery satisfies the condition to be equalized, the present current of the battery is acquired.

In step S232, the rest current threshold is adjusted according to the present current.

For example, in the case where the battery satisfies the condition to be equalized, the fuel gauge is first unlocked, and then the current threshold parameter is adjusted.

In this embodiment, the current threshold parameter may include a resting current threshold. As described above, it is generally determined by comparing the present current of the battery with a preset rest current threshold value when determining whether the battery is in the rest mode. Therefore, in this embodiment, in the process of adjusting the current threshold parameter, the present current of the battery is first acquired, and then the rest current threshold is adjusted according to the present current. Wherein the present current of the battery can be obtained from the fuel gauge.

For example, in order to bring the operation mode of the battery from the target operation mode to the rest mode, the rest current threshold may be increased such that the increased rest current threshold is N times the present current, where N is greater than 1. For example, the resting current threshold may be adjusted from an initial value to 2 x idis_now, where idis_now is the current of the battery, and the resting current threshold may also be adjusted to 3 x idis_now or 4 x idis_now, etc., which is not specifically limited in this disclosure. In this way, the battery operation mode can be changed from the target operation mode to the stationary mode.

Further, the current threshold parameter may also include a charge current threshold and a discharge current threshold. Accordingly, as shown in fig. 5, step S23 may further include the steps of

In step S233, an initial rest current threshold, an initial charge current threshold, and an initial discharge current threshold are obtained, and a first difference value of the initial charge current threshold and the initial rest current threshold, and a second difference value of the initial discharge current threshold and the initial rest current threshold are determined.

In step S234, the charging current threshold is adjusted according to the adjusted rest current threshold and the first difference, and the discharging current threshold is adjusted according to the adjusted rest current threshold and the second difference.

The values are illustrative to ensure that the logic of the fuel gauge in determining the battery mode of operation is normal, avoiding determining from the battery current that the fuel gauge is in both the rest mode and the discharge mode or the charge mode, in this disclosure, after adjusting the rest current threshold, further adjustments are made to the charge current threshold and the discharge current threshold. For example, assuming that the initial rest current threshold, the initial charge current threshold, and the initial discharge current threshold are shown in table 1, the first difference between the initial charge current threshold and the initial rest current threshold is 20mA, the second difference between the initial discharge current threshold and the initial rest current threshold is 50mA, if the adjusted rest current threshold is 2×idis_now, the adjusted charge current threshold is 2×idis_now+20, and the adjusted discharge current threshold is 2×idis_now+50.

By adopting the technical scheme, the working mode of the battery can be enabled to enter the standing mode, the logic of the fuel gauge when judging the working mode of the battery can be ensured to be correct, and the accuracy of entering the standing mode by the working mode of the battery is further improved.

In addition, as shown in table 1, in the related art, the charge balance is turned on only when the state of charge of the battery is 80% or more, and the charge balance is not turned on when the state of charge is less than 80%, which causes a problem that the charge balance cannot be turned on at the discharge end. Thus, in another embodiment, the equalization-on threshold needs to be adjusted in addition to the current threshold parameter.

As illustrated in fig. 6, the battery equalization method illustrated in fig. 2 may further include step S25.

In step S25, in the case where the battery satisfies the condition to be equalized, the equalization on threshold is reduced to obtain a new equalization on threshold.

Accordingly, step S24 may include step S241.

In step S241, when the operation mode of the battery is the stationary mode and the current state of charge of the battery is greater than or equal to the new equalization on threshold, the target cell on-state power equalization in the battery is controlled.

In order to enable the battery to still perform charge equalization at the end of discharge, in the present disclosure, the equalization on threshold may be reduced, for example, from 80% to 0% in the case where the battery satisfies the condition to be equalized. Thus, when the working mode of the battery is a standing mode and the current charge state of the battery is greater than or equal to 0%, the target battery core in the battery is controlled to start electric quantity equalization, so that the electric quantity equalization can be still started at the end of battery discharge, and the problem of jump of the electric quantity is avoided.

In the present disclosure, the fuel gauge is locked after adjusting the current threshold parameter and/or the equalization-on threshold.

In addition, as described above, when the operating state of the battery is judged to be the stationary state, in addition to the current being less than or equal to the stationary current threshold, the period of time during which the current is less than or equal to the stationary current threshold is made longer than the charge delay period or the discharge delay period, and therefore, after the current threshold parameter is adjusted, the battery needs to be put into the stationary mode after a certain period of time.

The values are described in that the order of execution of the steps S23 and S25 is not particularly limited in the present disclosure, and for example, the step S23 may be executed first, then the step S25 may be executed first, then the step S23 may be executed, and the step S23 and the step S25 may be executed simultaneously. Fig. 6 shows only the case where step S23 is performed first and then step S25 is performed.

In one embodiment, the target cells are actively balanced. If the battery comprises two electric cores, the two electric cores are target electric cores, namely, the electric core with large voltage is determined to be the balanced electric core, the electric core with small voltage is determined to be the balanced electric core, namely, the electric energy of the balanced electric core is balanced to the balanced electric core, so that the voltage difference between the two electric cores is reduced.

However, since the system of active equalization is complex, the reliability of equalization is poor, and thus in another embodiment dissipative equalization is turned on for the target cell. Specifically, under the condition that the working mode of the battery is a standing mode, determining the cell with the maximum current voltage as a target cell; and controlling the target battery cell to open dissipative equalization. The battery comprises a plurality of battery cells, wherein the target battery cell is the battery cell with the largest current voltage in the plurality of battery cells, and the target battery cell is controlled to open dissipative equalization.

Optionally, after the target cell is opened and balanced, when the voltage difference between the target cell and the cell with the smallest current voltage is smaller than or equal to the second voltage difference threshold, the target cell is controlled to terminate the electric quantity balance.

In practical application, when the voltage difference between the battery cells in the battery is smaller, no power jump condition is sent, so in the present disclosure, when the voltage difference between the target battery cell and the battery cell with the smallest current voltage is smaller than or equal to the second voltage difference threshold value, power equalization can be terminated. Wherein the second differential pressure threshold is 0, but may be a value greater than 0, such as 3mV, etc.

In addition, after the termination of the charge equalization, the current threshold parameter may also be adjusted to the initial current threshold parameter. Similarly, the equalization-on threshold may also be adjusted to an initial value.

Based on the same inventive concept, the present disclosure also provides a battery equalization apparatus. Fig. 7 is a block diagram illustrating a battery equalization apparatus according to an exemplary embodiment. As shown in fig. 7, the battery equalization apparatus 700 may include:

a first obtaining module 701, configured to obtain current electric quantity information of a battery when the battery is in a target working mode;

a first determining module 702 configured to determine, according to the current power information, whether the battery meets a preset condition to be equalized;

a first adjustment module 703 configured to adjust a current threshold parameter for determining a battery operation mode to place the battery in a stationary mode, if the battery satisfies the condition to be equalized; and

a first control module 704 configured to control a target cell within the battery to turn on equalization of charge when the battery is in the stationary mode.

Optionally, the current threshold parameter comprises a resting current threshold; the first adjustment module 703 includes:

Optionally, the current threshold parameter further includes a charge current threshold and a discharge current threshold; the first adjustment module 703 further includes:

Optionally, the apparatus further comprises:

the first control module 704 includes:

Optionally, the first control module 704 includes:

Optionally, the apparatus further comprises:

the first acquisition module 701 includes:

Optionally, the apparatus further comprises:

The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.

Fig. 8 is a block diagram illustrating a battery equalization apparatus according to an exemplary embodiment. For example, apparatus 800 may be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, exercise device, personal digital assistant, or the like.

Referring to fig. 8, apparatus 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.

The processing component 802 generally controls overall operation of the apparatus 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to perform all or part of the steps of a battery equalization method. Further, the processing component 802 can include one or more modules that facilitate interactions between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operations at the apparatus 800. Examples of such data include instructions for any application or method operating on the device 800, contact data, phonebook data, messages, pictures, videos, and the like. The memory 804 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.

The power component 806 provides power to the various components of the device 800. The power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the device 800.

The multimedia component 808 includes a screen between the device 800 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and/or a rear camera. The front camera and/or the rear camera may receive external multimedia data when the apparatus 800 is in an operational mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the device 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 further includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.

The sensor assembly 814 includes one or more sensors for providing status assessment of various aspects of the apparatus 800. For example, the sensor assembly 814 may detect an on/off state of the device 800, a relative positioning of the components, such as a display and keypad of the device 800, the sensor assembly 814 may also detect a change in position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, an orientation or acceleration/deceleration of the device 800, and a change in temperature of the device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communication between the apparatus 800 and other devices, either in a wired or wireless manner. The device 800 may access a wireless network based on a communication standard, such as WiFi,2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for performing a battery equalization method.

In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as memory 804 including instructions executable by processor 820 of apparatus 800 to perform a battery balancing method. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

In another exemplary embodiment, a computer program product is also provided, comprising a computer program executable by a programmable apparatus, the computer program having code portions for performing the above-described battery equalization method when executed by the programmable apparatus.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method of battery equalization, the method comprising:

2. The method of claim 1, wherein the current threshold parameter comprises a resting current threshold; and under the condition that the battery meets the condition to be balanced, adjusting a current threshold parameter for determining a battery working mode, wherein the current threshold parameter comprises the following steps:

and adjusting the standing current threshold according to the current.

3. The method of claim 2, wherein said adjusting said resting current threshold according to said present current comprises:

4. The method of claim 2, wherein the current threshold parameter further comprises a charge current threshold and a discharge current threshold;

5. The method according to claim 1, wherein the method further comprises:

6. The method of any one of claims 1-5, wherein the current charge information includes a current state of charge and a current voltage of each cell; the condition to be equalized includes that the current state of charge is less than or equal to a state of charge threshold, and a maximum differential pressure between the cells is greater than or equal to a first differential pressure threshold.

7. The method of claim 6, wherein controlling the target cell in the battery to turn on power balance if the operating mode of the battery is the stationary mode comprises:

and controlling the target battery cell to open dissipative equalization.

8. The method of claim 6, wherein the method further comprises:

acquiring the charge and discharge cycle times of the battery;

9. The method according to any one of claims 1-5, further comprising:

10. A battery equalization apparatus, comprising:

11. A battery equalization apparatus, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to:

12. A computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the steps of the method of any of claims 1-9.