CN118849884A - Battery balancing control method, device, equipment, program product and storage medium - Google Patents

Abstract

The present invention discloses a battery balancing control method, device, equipment, program product and storage medium. The battery balancing control method comprises: when the battery is in a charging state, obtaining battery charging information; determining whether the battery charging information meets the balancing start condition; when the battery charging information meets the balancing start condition, performing battery balancing, and after the battery charging is completed, determining battery balancing information based on the battery charging information at different times during the battery charging process, and storing the battery balancing information; when the battery is powered on, obtaining the stored battery balancing information, and performing battery balancing based on the battery balancing information until the balancing end condition is met. By adopting the above scheme, the efficiency of battery balancing is improved.

Description

Battery balancing control method, device, equipment, program product and storage medium

Technical Field

The present invention relates to the technical field of batteries, and in particular to a battery balancing control method, device, equipment, program product and storage medium.

Background Art

The power battery system is an important component of pure electric vehicles. How to ensure the consistency of the power battery to increase the battery life is crucial for electric vehicles.

In the actual application of relevant equalization technology, battery information is mainly collected during the battery charging and discharging process, and then it is determined whether the battery needs to be equalized based on the battery information, and the battery is equalized, and the equalization efficiency is low.

Summary of the invention

The present invention provides a battery balancing control method, device, equipment, program product and storage medium to solve the problem of low battery balancing efficiency.

According to one aspect of the present invention, a battery balancing control method is provided, the battery balancing control method comprising:

When the battery is in charging state, obtain battery charging information;

Determining whether the battery charging information meets the equalization start condition;

When the battery charging information meets the equalization start condition, perform battery equalization, and after the battery charging is completed, determine battery equalization information based on the battery charging information at different times during the battery charging process, and store the battery equalization information;

When the battery is powered on, the stored battery balancing information is acquired, and battery balancing is performed based on the battery balancing information until a balancing end condition is met.

In an optional embodiment of the present invention, the battery includes a plurality of cells, the battery charging information includes single cell voltages and charging currents of the plurality of cells, the battery balancing information includes cells to be balanced and corresponding balancing durations, and the determining of the battery balancing information based on the battery charging information at different times during the battery charging process includes:

Determining the battery cells to be balanced based on the single cell voltages of the plurality of battery cells immediately before charging is completed;

Determining an average cell voltage just before the charging is finished based on the single cell voltages of the plurality of cells just before the charging is finished;

The balancing time of the battery cells to be balanced is determined based on the battery cell average voltage and the charging current.

In an optional embodiment of the present invention, the determining the balancing time of the battery cells to be balanced based on the average battery cell voltage and the charging current includes:

The balanced capacity of the battery cell to be balanced is determined based on the average voltage of the battery cell and the charging current by the following formula:

Q _i = , is the moment when the single cell voltage of the battery cell to be balanced is the average voltage of the battery cell, The charging end time is for - The charging current between, k is the conversion coefficient, k≤1, _Qi is the equalization capacity, is the cell serial number of the cell to be balanced;

The balancing time of the battery cell to be balanced is determined based on the balancing capacity of the battery cell to be balanced by the following formula:

t _i =Q _i /I _avg ; wherein t _i is the balancing time, and I _{avg is} the passive balancing current.

In an optional embodiment of the present invention, the battery charging information includes single cell voltages and charging currents of a plurality of battery cells, and determining whether the battery charging information satisfies the equalization start condition includes:

Determine whether the charging current within a preset time period is less than a preset current value, determine whether the highest cell voltage is greater than a preset voltage threshold, and determine whether the battery voltage difference is greater than or equal to a cell voltage difference equalization start threshold, wherein the battery voltage difference is the difference between the highest cell voltage and the lowest cell voltage;

When the charging current within the preset time period is less than the preset current value, the highest single cell voltage is greater than the preset voltage threshold, and the battery voltage difference is greater than or equal to the single cell voltage difference equalization start threshold, it is determined that the equalization start condition is met;

When the charging current within a preset time period is greater than or equal to a preset current value, or the highest single cell voltage is less than or equal to a preset voltage threshold, or the battery voltage difference is less than the single cell voltage difference equalization start threshold, it is determined that the equalization start condition is not met.

In an optional embodiment of the present invention, the battery balancing control method includes at least one of the following:

The preset time length is greater than or equal to 30 seconds, the preset current value is a preset ratio of 1h rate discharge current, and the preset ratio is any value in the range of 0.15-0.25;

The preset voltage threshold is the single cell cut-off voltage minus the preset voltage, and the preset voltage is any value between 0.04V and 0.06V.

In an optional embodiment of the present invention, the preset ratio is 0.2; and/or;

The preset voltage is 0.05V.

According to another aspect of the present invention, a battery balancing control device is provided, the battery balancing control device comprising:

A charging information acquisition module, used to acquire battery charging information when the battery is in a charging state;

An activation determination module, used to determine whether the battery charging information satisfies an equalization activation condition;

a battery balancing information determination module, configured to perform battery balancing when the battery charging information meets the balancing start condition, and after the battery charging is completed, determine the battery balancing information based on the battery charging information at different times during the battery charging process, and store the battery balancing information;

The power-on balancing module is used to obtain the stored battery balancing information when the battery is powered on, and perform battery balancing based on the battery balancing information until a balancing end condition is met.

According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

at least one processor; and

a memory communicatively connected to the at least one processor; wherein,

The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the battery balancing control method according to any embodiment of the present invention.

According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the battery balancing control method according to any embodiment of the present invention when executed.

According to another aspect of the present invention, a computer program product is provided. The computer program product includes a computer program. When the computer program is executed by a processor, the battery balancing control method according to any embodiment of the present invention is implemented.

The technical solution of the embodiment of the present invention performs equalization judgment during the battery charging process, performs battery equalization when the equalization start condition is met, determines battery equalization information based on the battery charging information at different times during the charging process after charging is completed, and obtains the battery equalization information after the battery is powered on next time to continue balancing the battery until the equalization end condition is met. Compared with the related art in which equalization judgment is performed after the battery is powered on, the present solution can directly perform equalization based on the battery equalization information obtained at the end of the previous charging after powering on, thereby improving the efficiency of battery equalization and increasing the service life of the battery.

It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

FIG1 is a flow chart of a battery balancing control method provided according to a first embodiment of the present invention;

FIG2 is a flow chart of the step of determining whether the battery charging information satisfies the equalization start condition in FIG1;

FIG3 is a flow chart of a battery balancing control method provided according to a second embodiment of the present invention;

FIG4 is a schematic diagram of the structure of a battery balancing control device provided according to Embodiment 3 of the present invention;

FIG. 5 is a schematic diagram of the structure of an electronic device for implementing the battery balancing control method according to an embodiment of the present invention.

DETAILED DESCRIPTION

In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

Embodiment 1

FIG1 is a flow chart of a battery balancing control method provided by Embodiment 1 of the present invention. This embodiment is applicable to the case of balancing batteries in a battery system of a vehicle. The battery balancing control method can be executed by a battery balancing control device. The battery balancing control device can be implemented in the form of hardware and/or software. The battery balancing control device can be configured in a battery system. As shown in FIG1 , the battery balancing control method includes:

S110: When the battery is in a charging state, obtain battery charging information.

Among them, battery charging information refers to information about battery-related parameters during the battery charging process. In some embodiments, the battery includes multiple battery cells, and the battery charging information includes single cell voltages and charging currents of the multiple battery cells. Single cell voltage refers to the voltage value of a single battery cell, and charging current refers to the current value of the battery cell when charging. The battery is a unit that obtains electrical energy from the outside and can output electrical energy to the outside, and the battery cell is a basic unit device that converts chemical energy into electrical energy.

S120: Determine whether the battery charging information meets a balancing start condition.

The balancing start condition refers to a condition that the battery charging information will meet when the battery needs to be balanced.

S130: When the battery charging information meets the balancing start condition, perform battery balancing, and after the battery charging is completed, determine battery balancing information based on the battery charging information at different times during the battery charging process, and store the battery balancing information.

Among them, during the battery charging process, a balancing judgment is performed, and if the battery charging information meets the balancing start condition, battery balancing is performed. Specifically, after the balancing start condition is met, if the battery is still in a charging state, battery balancing is performed by discharging all single cells in the battery system with V-Vmin≥∆V by passive balancing, where V is the single cell voltage of the cell, Vmin is the lowest single cell voltage, ∆V is the difference between the highest single cell voltage and the lowest single cell voltage among the multiple cells included in the battery, the lowest single cell voltage is the minimum voltage value of the multiple cells included in the battery, and the highest single cell voltage is the maximum voltage value of the multiple cells included in the battery.

The battery balancing information refers to information indicating how to manage different single cells inside the battery so that they are kept as consistent as possible in terms of voltage, capacity, internal resistance, etc. After the balancing start condition is met, such as the battery charging is completed, the battery balancing information is determined according to the battery charging information at different times during the charging process.

S140: When the battery is powered on, obtain the stored battery balancing information, and perform battery balancing based on the battery balancing information until a balancing end condition is met.

The balancing end condition refers to a condition that will be met when balancing needs to be ended. When the battery is powered on again, the battery balancing information obtained after the last charging is completed is directly obtained, and the battery is continued to be balanced according to the battery balancing information.

The above scheme performs equalization judgment during the battery charging process, performs battery equalization when the equalization start condition is met, determines battery equalization information based on the battery charging information at different times during the charging process after charging is completed, and obtains the battery equalization information after the battery is powered on next time to continue balancing the battery until the equalization end condition is met. Compared with the related art in which equalization judgment is performed after the battery is powered on, the present scheme can directly perform equalization based on the battery equalization information obtained at the end of the previous charging after powering on, thereby improving the efficiency of battery equalization and extending the battery life.

In an optional embodiment of the present invention, as shown in FIG2 , the battery charging information includes single cell voltages and charging currents of a plurality of battery cells, and determining whether the battery charging information satisfies the equalization start condition includes:

S121, determining whether the charging current within a preset time period is less than a preset current value, determining whether the highest single cell voltage is greater than a preset voltage threshold, and determining whether the battery voltage difference is greater than or equal to a single cell voltage difference equalization start threshold, wherein the battery voltage difference is the difference between the highest single cell voltage and the lowest single cell voltage.

Among them, charging current refers to the current flowing through the circuit during the battery charging process. The charging current during battery balancing usually needs to be controlled within a certain range to ensure that the battery system will not be damaged due to overcurrent. The preset current value is the value that the charging current should not exceed when the battery system is within the safe range, and can be adjusted according to the type of battery system.

The single cell voltage is the voltage value of a single battery cell, the lowest single cell voltage is the minimum voltage value of the single cell voltages of the multiple battery cells included in the battery, and the highest single cell voltage is the maximum voltage value of the single cell voltages of the multiple battery cells included in the battery. By subtracting the lowest single cell voltage from the highest single cell voltage, the battery voltage difference can be obtained.

When the cell voltage is too low, it is not advisable to continue discharging. If the discharge continues, it may affect the performance of the cell. Therefore, when the single cell voltage of the cell is lower than a certain value, it is not advisable to balance. The preset voltage threshold is the voltage that the cell should be greater than when it can be balanced.

The single cell voltage difference equalization start threshold refers to the minimum voltage difference that triggers the battery equalization process. Different types of battery cells have different single cell voltage difference equalization start thresholds. The specific value of the single cell voltage difference equalization start threshold is not specifically limited here.

S122: When the charging current within the preset time period is less than the preset current value, the highest single cell voltage is greater than the preset voltage threshold, and the battery voltage difference is greater than or equal to the single cell voltage difference equalization start threshold, it is determined that the equalization start condition is met.

Among them, when the charging current within the preset time is less than the preset current value, the highest single cell voltage is greater than the preset voltage threshold and the battery voltage difference is greater than or equal to the single cell voltage difference equalization start threshold, it means that the battery should be equalized at this time and it is determined that the equalization start condition is met.

S123: When the charging current within the preset time period is greater than or equal to the preset current value, or the highest single cell voltage is less than or equal to the preset voltage threshold, or the battery voltage difference is less than the single cell voltage difference equalization start threshold, it is determined that the equalization start condition is not met.

Among them, when the charging current within the preset time is greater than or equal to the preset current value, or the highest single cell voltage is less than or equal to the preset voltage threshold, or the battery voltage difference is less than the single cell voltage difference equalization start threshold, it means that the battery may not need to be equalized or there may be some risks in performing battery equalization, so the equalization start condition is not met.

Through the above solution, it is possible to determine whether the battery meets the balanced start-up condition according to the single cell voltage and charging current of multiple battery cells.

In an optional embodiment of the present invention, the preset time length is greater than or equal to 30 seconds, and the preset current value is a preset ratio of 1h rate discharge current, and the preset ratio is any value in the range of 0.15-0.25. Preferably, the preset ratio is 0.2. The 1h rate discharge current represents the current of the battery being fully discharged within 1 hour, and its value is equal to the rated capacity value of the battery.

In an optional embodiment of the present invention, the preset voltage threshold is the single cell cut-off voltage minus the preset voltage, and the preset voltage is any value between 0.04V and 0.06V. Preferably, the preset voltage is 0.05V. The single cell cut-off voltage refers to the lowest operating voltage value at which the cell should not continue to discharge when the battery is discharged. Therefore, when the highest single cell voltage is less than or equal to the preset voltage threshold, the preset voltage threshold is the single cell cut-off voltage minus the preset voltage. At this time, the overall voltage of the cells included in the battery is small and it is not suitable to be balanced.

Embodiment 2

FIG3 is a flow chart of a battery balancing control method provided by Embodiment 2 of the present invention. The relationship between this embodiment and the above embodiment is that Embodiment 1 is improved. Optionally, the battery includes multiple cells, the battery charging information includes the single cell voltages and charging currents of the multiple cells, the battery balancing information includes the cells to be balanced and the corresponding balancing time, and the battery balancing information is determined based on the battery charging information at different times during the battery charging process, including: determining the cells to be balanced based on the single cell voltages of the multiple cells at the moment before the charging is completed; determining the average cell voltage at the moment before the charging is completed based on the single cell voltages of the multiple cells at the moment before the charging is completed; and determining the balancing time of the cells to be balanced based on the average cell voltage and the charging current. As shown in FIG3 , the battery balancing control method includes:

S210: When the battery is in a charging state, obtain battery charging information.

S220: Determine whether the battery charging information meets a balancing start condition.

S230, when the battery charging information meets the equalization start condition, perform battery equalization, and after the battery charging is completed, determine the battery cells to be equalized based on the single cell voltages of the multiple battery cells at the moment before the charging is completed; determine the average battery cell voltage at the moment before the charging is completed based on the single cell voltages of the multiple battery cells at the moment before the charging is completed; determine the equalization time of the battery cells to be equalized based on the average battery cell voltage and the charging current, and store the battery equalization information. The battery equalization information includes the battery cells to be equalized and the corresponding equalization time.

The moment before the end of charging refers to the moment when the charging preparation is completed and the charging current is greater than 0. The cells to be balanced refer to the cells whose power needs to be adjusted to achieve the balance of the power of the cells in the battery. The imbalance of power is usually caused by voltage imbalance, so it can be determined which cells need to be balanced based on the single cell voltage of the cell at the moment before the end of charging.

The balancing time is the time required for the battery cells to be balanced. The average battery cell voltage is the average value of the single cell voltages of multiple battery cells. Both the charging current and the average battery cell voltage have an impact on the balancing time. Therefore, the balancing time of the battery cells to be balanced can be determined based on the average battery cell voltage and the charging current.

S240: When the battery is powered on, obtain the stored battery balancing information, and perform battery balancing based on the battery balancing information until a balancing end condition is met.

Through the above scheme, the battery cells to be balanced and the corresponding balancing time can be calculated after the battery charging is completed. When the battery is powered on later, the balancing time and the battery cells to be balanced can be obtained, and the battery cells to be balanced can be balanced according to the corresponding balancing time until the balancing end condition is met. Compared with the related art of performing balancing judgment after the battery is powered on, this scheme can improve the efficiency of battery balancing and increase the battery life.

In an optional embodiment of the present invention, determining the battery cells to be balanced based on the single cell voltages of the plurality of battery cells immediately before the end of charging includes: determining the battery cells whose single cell voltage immediately before the end of charging is greater than or equal to the sum of the lowest single cell voltage and the battery voltage difference as the battery cells to be balanced, wherein the battery voltage difference is the difference between the highest single cell voltage and the lowest single cell voltage.

Among them, when the single cell voltage is greater than or equal to the sum of the lowest single cell voltage and the battery voltage difference, it means that the voltage of the battery cell is too large and needs to be discharged for equalization. Therefore, the battery cell whose single cell voltage is greater than or equal to the sum of the lowest single cell voltage and the battery voltage difference just before the end of charging is determined as the battery cell to be balanced.

In an optional embodiment of the present invention, the determining the balancing time of the battery cells to be balanced based on the average battery cell voltage and the charging current includes:

The equalization capacity of the battery cell to be equalized is determined based on the average voltage of the battery cell and the charging current; and the equalization time of the battery cell to be equalized is determined based on the equalization capacity of the battery cell to be equalized. Among them, the equalization capacity refers to the capacity of the battery cell to be equalized after the equalization of the battery cell to be equalized is completed, and the equalization time refers to the time required for the battery cell to be equalized to be equalized. There is a correlation between the equalization capacity and the equalization time, so the equalization time of the battery cell to be equalized can be determined according to the equalization capacity of the battery cell to be equalized.

On the basis of the above embodiment, the step of determining the equalization capacity of the battery cell to be equalized based on the average voltage of the battery cell and the charging current includes:

The equalization capacity of the battery cell to be equalized is determined based on the average voltage of the battery cell and the charging current by the following formula: _Qi = , is the moment when the single cell voltage of the battery cell to be balanced is the average voltage of the battery cell, The charging end time is for - The charging current between, k is the conversion coefficient, k≤1, _Qi is the equalization capacity, is the cell number of the cell to be balanced. By this formula, the balanced capacity of the cell to be balanced can be conveniently calculated.

In an optional embodiment of the present invention, the determining the balancing time of the battery cells to be balanced based on the balancing capacity of the battery cells to be balanced includes: determining the balancing time of the battery cells to be balanced based on the balancing capacity of the battery cells to be balanced by the following formula: t _i =Q _i /I _avg ; wherein t _i is the balancing time, and I avg _is the passive balancing current. Among them, passive balancing is actually adding a resistive load to the battery. When the system detects that the voltage of a battery cell is too high and needs to be discharged for balancing, the load resistor will be turned on to allow the battery cells to be balanced to discharge to the resistor, consume the energy of the battery cells to be balanced, and finally make all the battery cells to be balanced reach the same method. Passive balancing current refers to the current value when the battery cells are passively balanced. Through the above formula, the balancing time can be conveniently calculated.

In an optional embodiment of the present invention, after performing battery balancing, the method further includes: determining whether the duration of balancing reaches the balancing duration, and if so, determining that a balancing end condition is satisfied.

In an optional embodiment of the present invention, after the battery balancing is performed, the step further includes: executing the step of obtaining battery charging information and determining whether the battery charging information satisfies the balancing start condition; when the battery charging information satisfies the balancing start condition, it is determined that the balancing end condition is satisfied, and at this time, the battery cell balancing is terminated, and the battery will be balanced according to the battery charging information that currently triggers the new balancing start condition.

In an optional embodiment of the present invention, when the duration of balancing does not reach the balancing duration and the battery charging information does not meet the balancing start condition, it is determined that the balancing end condition is not met.

In other embodiments, other equalization end conditions may also be set, which are not specifically limited here.

Embodiment 3

FIG4 is a schematic diagram of the structure of a battery balancing control device provided in Embodiment 3 of the present invention. As shown in FIG4 , the battery balancing control device includes:

The charging information acquisition module 61 is used to acquire battery charging information when the battery is in a charging state.

The start determination module 62 is used to determine whether the battery charging information meets the equalization start condition.

The battery balancing information determining module 63 is used to perform battery balancing when the battery charging information meets the balancing start condition, and after the battery charging is completed, determine the battery balancing information based on the battery charging information at different times during the battery charging process, and store the battery balancing information.

The power-on balancing module 64 is used to obtain the stored battery balancing information when the battery is powered on, and perform battery balancing based on the battery balancing information until a balancing end condition is met.

In an optional embodiment of the present invention, the battery includes a plurality of cells, the battery charging information includes single cell voltages and charging currents of the plurality of cells, and the battery balancing information determination module 63 includes:

The balanced cell determination submodule is used to determine the cells to be balanced based on the single cell voltages of the plurality of cells immediately before the charging is completed.

The average voltage determination submodule is used to determine the average voltage of the battery cells just before the charging is finished based on the single cell voltages of the plurality of battery cells just before the charging is finished.

The balancing time determination submodule is used to determine the balancing time of the battery cell to be balanced based on the average voltage of the battery cell and the charging current.

In an optional embodiment of the present invention, the equalization duration determination submodule includes:

A balancing capacity determination unit is used to determine the balancing capacity of the battery cell to be balanced based on the average voltage of the battery cell and the charging current by the following formula:

Q _i = , is the moment when the single cell voltage of the battery cell to be balanced is the average voltage of the battery cell, The charging end time is for - The charging current between, k is the conversion coefficient, k≤1, _Qi is the equalization capacity, is the cell number of the cell to be balanced.

The balancing time determining unit is used to determine the balancing time of the battery cell to be balanced based on the balancing capacity of the battery cell to be balanced by the following formula:

t _i =Q _i /I _avg ; wherein t _i is the balancing time, and I _{avg is} the passive balancing current.

In an optional embodiment of the present invention, the start determination module 62 includes:

The start determination submodule is used to determine whether the charging current within a preset time period is less than a preset current value, determine whether the highest single cell voltage is greater than a preset voltage threshold, and determine whether the battery voltage difference is greater than or equal to the single cell voltage difference equalization start threshold, wherein the battery voltage difference is the difference between the highest single cell voltage and the lowest single cell voltage.

The first balancing start determination submodule is used to determine that the balancing start condition is met when the charging current within a preset time period is less than a preset current value, the highest single cell voltage is greater than the preset voltage threshold, and the battery voltage difference is greater than or equal to the single cell voltage difference balancing start threshold.

The second balancing start determination submodule is used to determine that the balancing start condition is not met when the charging current within a preset time period is greater than or equal to a preset current value, or the highest single cell voltage is less than or equal to a preset voltage threshold, or the battery voltage difference is less than the single cell voltage difference balancing start threshold.

In an optional embodiment of the present invention, the battery balancing control method includes at least one of the following:

The preset time length is greater than or equal to 30 seconds, the preset current value is a preset proportion of a 1h rate discharge current, and the preset proportion is any value between 0.15 and 0.25.

The preset voltage threshold is the single cell cut-off voltage minus the preset voltage, and the preset voltage is any value between 0.04V and 0.06V.

In an optional embodiment of the present invention, the preset ratio is 0.2; and/or; the preset voltage is 0.05V.

The battery balancing control device provided in the embodiment of the present invention can execute the battery balancing control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

Embodiment 4

FIG5 shows a schematic diagram of the structure of an electronic device that can be used to implement an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and/or required herein.

As shown in FIG5 , the electronic device includes at least one processor 11, and a memory connected to the at least one processor 11 in communication, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In RAM 13, various programs and data required for the operation of the electronic device can also be stored. The processor 11, ROM 12 and RAM 13 are connected to each other through a bus 14. An input/output (I/O) interface 15 is also connected to the bus 14.

A number of components in the electronic device are connected to the I/O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device to exchange information/data with other devices through a computer network such as the Internet and/or various telecommunication networks.

The processor 11 may be a variety of general and/or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a battery balancing control method.

In some embodiments, the battery balancing control method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed on the electronic device via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the battery balancing control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the battery balancing control method in any other appropriate manner (e.g., by means of firmware).

In some embodiments, the electronic device includes a computer program product, the computer program product includes a computer program, and the computer program implements the various methods and processes described above when executed by the processor 11, such as the battery balancing control method.

Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and/or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions/operations specified in the flow chart and/or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A battery equalization control method, characterized by comprising:

when the battery is in a charging state, obtaining battery charging information;

determining whether the battery charging information meets an equilibrium starting condition;

when the battery charging information meets the balance starting condition, performing battery balance, determining battery balance information based on the battery charging information at different moments in the battery charging process after the battery charging is finished, and storing the battery balance information;

And when the battery is electrified, acquiring the stored battery balancing information, and balancing the battery based on the battery balancing information until the balancing ending condition is met.

2. The battery equalization control method of claim 1, wherein the battery comprises a plurality of cells, the battery charge information comprises cell voltages and charge currents of the plurality of cells, the battery equalization information comprises cells to be equalized and corresponding equalization durations, and the determining the battery equalization information based on the battery charge information at different times during the battery charge comprises:

Determining a cell to be balanced based on the monomer voltages of the plurality of cells immediately before the end of charging;

determining an average voltage of the battery cells immediately before the end of the charging based on the monomer voltages of the plurality of battery cells immediately before the end of the charging;

And determining the equalization duration of the battery cells to be equalized based on the average voltage of the battery cells and the charging current.

3. The battery equalization control method according to claim 2, wherein the determining the equalization period of the cells to be equalized based on the cell average voltage and the charging current includes:

determining the balancing capacity of the battery cell to be balanced by the following formula based on the battery cell average voltage and the charging current:

Q_i=， the time when the single voltage of the battery cell to be balanced is the average voltage of the battery cell, In order to achieve the end of the charge,Is that-The charging current between the two is k is a conversion coefficient, k is less than or equal to 1, Q _i is the balance capacity,The cell serial number of the cell to be balanced;

Determining the equalization duration of the battery cell to be equalized based on the equalization capacity of the battery cell to be equalized by:

t _i=Q_i/I _{Are all} ; wherein t _i is the equalization duration, and I _{Are all} is the passive equalization current.

4. The battery equalization control method according to any one of claims 1 to 3, wherein the battery charge information includes cell voltages and charge currents of a plurality of cells, and the determining whether the battery charge information satisfies an equalization-on condition includes:

Determining whether the charging current is smaller than a preset current value within a preset duration, determining whether the highest single voltage is larger than a preset voltage threshold value, and determining whether a battery voltage difference is larger than or equal to a single voltage difference balance starting threshold value, wherein the battery voltage difference is the difference between the highest single voltage and the lowest single voltage;

when the charging current in the preset duration is smaller than a preset current value, the highest single voltage is larger than the preset voltage threshold value, and the battery voltage difference is larger than or equal to the single voltage difference balance starting threshold value, determining that a balance starting condition is met;

And when the charging current in the preset time period is larger than or equal to a preset current value, or the highest single voltage is smaller than or equal to a preset voltage threshold, or the battery voltage difference is smaller than the single voltage difference balance starting threshold, determining that the balance starting condition is not met.

5. The battery equalization control method of claim 4, wherein the battery equalization control method comprises at least one of:

The preset time length is greater than or equal to 30 seconds, the preset current value is 1h rate discharge current with a preset proportion, and the preset proportion is any value of 0.15-0.25;

The preset voltage threshold is obtained by subtracting a preset voltage from the cut-off voltage of the single battery cell, and the preset voltage is any value of 0.04V-0.06V.

6. The battery equalization control method of claim 5, wherein said preset ratio is 0.2; and/or;

The preset voltage is 0.05V.

7. A battery equalization control device, characterized by comprising:

the charging information acquisition module is used for acquiring battery charging information when the battery is in a charging state;

The starting judging module is used for determining whether the battery charging information meets the balanced starting condition or not;

The battery equalization information determining module is used for performing battery equalization when the battery charging information meets the equalization starting condition, determining battery equalization information based on the battery charging information at different moments in the battery charging process after the battery charging is finished, and storing the battery equalization information;

And the power-on balancing module is used for acquiring the stored battery balancing information when the battery is electrified, and balancing the battery based on the battery balancing information until the balancing ending condition is met.

8. An electronic device, the electronic device comprising:

at least one processor; and

A memory communicatively coupled to the at least one processor; wherein,

The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the battery equalization control method of any of claims 1-6.

9. A computer readable storage medium storing computer instructions for causing a processor to implement the battery equalization control method of any of claims 1-6 when executed.

10. A computer program product, characterized in that the computer program product comprises a computer program which, when executed by a processor, implements the battery equalization control method according to any of claims 1-6.