WO2023225795A1 - 电芯均衡方法、装置、电子设备和存储介质 - Google Patents

电芯均衡方法、装置、电子设备和存储介质 Download PDF

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Publication number
WO2023225795A1
WO2023225795A1 PCT/CN2022/094467 CN2022094467W WO2023225795A1 WO 2023225795 A1 WO2023225795 A1 WO 2023225795A1 CN 2022094467 W CN2022094467 W CN 2022094467W WO 2023225795 A1 WO2023225795 A1 WO 2023225795A1
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cell
energy storage
storage system
cells
battery
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PCT/CN2022/094467
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English (en)
French (fr)
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周美娟
彭雷
王文倩
张世昌
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宁德时代新能源科技股份有限公司
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Priority to PCT/CN2022/094467 priority Critical patent/WO2023225795A1/zh
Publication of WO2023225795A1 publication Critical patent/WO2023225795A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging

Definitions

  • This application relates to the field of battery cell technology, and specifically to a battery cell balancing method, device, electronic equipment and storage medium.
  • the energy storage system includes multiple cells. There may be capacity differences between the cells, and there is a cell with the smallest capacity.
  • this application provides a cell balancing method, device, electronic equipment and storage medium, which can fully utilize the power of the minimum capacity cell and the total capacity of the energy storage system.
  • this application provides a cell balancing method, which method includes: performing charging and discharging operations on the cells in the energy storage system, determining the first cell that reaches the discharge cut-off voltage first during the discharging operation, and charging The second battery cell that reaches the charging cut-off voltage first during operation; if the first battery cell and the second battery cell are different, the battery cells in the energy storage system are balanced.
  • the cells in the energy storage system need to be balanced so that the cells that reach the charging cut-off voltage first after equalization are the cells with the smallest capacity. In this way, the cells with the smallest capacity can be fully utilized. capacity, thereby fully utilizing the total capacity of the energy storage system.
  • the method further includes: when the first battery cell and the second battery cell are the same, determining that the battery cells in the energy storage system have reached a balanced state or stopping balancing processing of the battery cells in the energy storage system. .
  • the minimum capacity battery core can be fully charged. In this way, the capacity of the minimum capacity battery core can be fully utilized, and thus the total capacity of the energy storage system can be fully utilized.
  • the above-mentioned balancing process for the cells in the energy storage system includes: determining the target cells in the energy storage system that meet the balancing conditions; and performing balancing processing on the target cells.
  • the target cell is determined according to the balancing conditions, thereby performing targeted balancing processing, which can improve the efficiency of the balancing processing.
  • the method further includes: performing charge and discharge operations on the cells in the energy storage system, and determining the third cell that reaches the discharge cut-off voltage first during the discharge operation, And the fourth battery cell that reaches the charging cut-off voltage first during the charging operation; when the third battery cell and the fourth battery cell are the same, determine that the battery cells in the energy storage system have reached an equilibrium state or stop charging the batteries in the energy storage system.
  • the cells are balanced.
  • the above-mentioned determination of target cells that meet the balancing conditions in the energy storage system includes: obtaining the cell voltage of each cell and the cell voltage difference between each cell and the first cell; The cell whose cell voltage is greater than the first voltage threshold and whose cell voltage difference is greater than the second voltage threshold is determined as the target cell.
  • the target cell to be equalized can be accurately and quickly determined based on the first voltage threshold and the second voltage threshold, thereby improving the equalization efficiency.
  • the first voltage threshold is determined based on the charging cut-off voltage of the energy storage system
  • the second voltage threshold is determined based on the maximum allowable voltage difference between cells of the energy storage system.
  • the above-mentioned equalization processing of the target battery cell includes: determining the target discharge duration according to the preset discharge amount; performing discharge processing on the target battery core according to the target discharge duration.
  • determining the target discharge duration can quantify the discharge processing of the target cells, making it easier to control the equalization processing of the target cells.
  • the above-mentioned discharging of the target cells according to the target discharge duration includes: using a balancing circuit set in the energy storage system to discharge the target cells, and timing from the start of discharge; when the timing duration reaches the target When the discharge time is longer, stop discharging the target cell.
  • equalization processing can be easily implemented using an equalizing circuit.
  • this application also provides a cell balancing device, which includes:
  • the first cell determination module is used to charge and discharge the cells in the energy storage system, determine the first cell that reaches the discharge cut-off voltage first during the discharge operation, and the first cell that reaches the charge cut-off voltage during the charging operation.
  • the balancing processing module is used to perform balancing processing on the battery cells in the energy storage system if the first battery core and the second battery core are different.
  • the balancing processing module is specifically used to determine the target cells in the energy storage system that meet the balancing conditions; and perform balancing processing on the target cells.
  • the device further includes:
  • a first balancing stop module configured to determine that the cells in the energy storage system have reached an equilibrium state or to stop charging the cells in the energy storage system when the first cell and the second cell are the same. The cells are balanced.
  • the device further includes:
  • the second cell determination module is used to charge and discharge the cells in the energy storage system, determine the third cell that reaches the discharge cut-off voltage first during the discharge operation, and the third cell that first reaches the charge cut-off voltage during the charging operation.
  • the second balancing stop module is used to determine that the battery cells in the energy storage system have reached a balanced state or to stop balancing the battery cells in the energy storage system when the third battery cell and the fourth battery cell are the same.
  • the equalization processing module is specifically used to obtain the cell voltage of each cell and the cell voltage difference between each cell and the first cell; voltage threshold, and the cell whose cell voltage difference is greater than the second voltage threshold is determined as the target cell.
  • the first voltage threshold is determined based on the charging cut-off voltage of the energy storage system
  • the second voltage threshold is determined based on the maximum allowable voltage difference between cells of the energy storage system.
  • the equalization processing module is specifically configured to determine the target discharge duration based on the preset discharge amount; and perform discharge processing on the target battery cells according to the target discharge duration.
  • the equalization processing module is specifically used to use the equalization loop set up in the energy storage system to perform discharge processing on the target cells, and time the discharge from the start; when the timing reaches the target discharge time, stop Discharge the target cell.
  • this application also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor.
  • the processor executes the computer program, the The method described in the first aspect above.
  • embodiments of the present application provide a computer-readable storage medium on which a computer program is stored.
  • the computer program is executed by a processor, the method described in the first aspect is implemented.
  • embodiments of the present application provide a computer program product, including a computer program that implements the method described in the first aspect when executed by a processor.
  • Figure 1 is a schematic flowchart of a cell balancing method according to some embodiments of the present application.
  • Figure 2 is a schematic flow chart of a cell balancing method according to some embodiments of the present application.
  • Figure 3 is a schematic flowchart of the steps of balancing cells in an energy storage system according to some embodiments of the present application
  • Figure 4 is a schematic flowchart of the steps of equalizing the target cells according to some embodiments of the present application.
  • Figure 5 is a schematic flowchart of a cell balancing method according to some embodiments of the present application.
  • Figure 6 is a structural block diagram of a cell balancing device according to some embodiments of the present application.
  • Figure 7 is a structural block diagram of a cell balancing device according to some embodiments of the present application.
  • Figure 8 is a structural block diagram of a cell balancing device according to some embodiments of the present application.
  • Figure 9 is an internal structure diagram of an electronic device in some embodiments of the present application.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.
  • multiple refers to more than two (including two).
  • multiple groups refers to two or more groups (including two groups), and “multiple pieces” refers to It is more than two pieces (including two pieces).
  • the energy storage system includes multiple cells. There may be capacity differences between the cells, and there is a cell with the smallest capacity. Under normal circumstances, if one battery cell in the energy storage system reaches the charging cut-off voltage, all the battery cells in the energy storage system will stop charging; if one battery cell reaches the discharge cut-off voltage, all the battery cells in the energy storage system will stop discharging. When other cells reach the charge cut-off voltage first but the minimum capacity cell does not, the minimum capacity cell is not fully charged. Afterwards, the amount of electricity that the smallest-capacity battery cell can release during discharge is lower than its rated capacity, resulting in the total capacity of the energy storage system being underutilized.
  • the battery cells in the energy storage system are charged and discharged, and the first battery cell that reaches the discharge cut-off voltage first during the discharging operation is determined, and the first battery cell that reaches the charging limit during the charging operation is determined.
  • the first battery cell that reaches the discharge cut-off voltage first and the second battery cell that first reaches the charge cut-off voltage are different, it can be determined that the battery cell that reaches the charge cut-off voltage first is not the minimum capacity battery cell.
  • the battery cells and energy storage systems disclosed in the embodiments of the present application can be, but are not limited to, used in electrical devices such as vehicles, ships, or aircrafts to provide electrical energy to the electrical devices, and the battery cells and energy storage systems disclosed in the embodiments of the present application
  • the system can also be connected to the grid so that stored electrical energy can be exported to the grid.
  • a cell balancing method is provided. Taking this method applied to an energy storage system as an example, it may include the following steps:
  • Step 101 Charge and discharge the battery cells in the energy storage system, and determine the first battery cell that reaches the discharge cut-off voltage first during the discharge operation, and the second battery cell that first reaches the charge cut-off voltage during the charging operation.
  • the energy storage system includes multiple cells, and the cells in the energy storage system are discharged. When one of the cells reaches the discharge cut-off voltage first, the discharge operation of all cells is stopped. After that, record the first cell that reaches the discharge cut-off voltage first.
  • the battery cells in the energy storage system are charged. When one of the battery cells reaches the charging cut-off voltage first, the charging operation of all battery cells is stopped. After that, record the second battery cell that reaches the charging cut-off voltage first.
  • the first battery cell that reaches the discharge cut-off voltage first is battery cell A; after the charging operation, the second battery cell that first reaches the charging cut-off voltage is battery cell B.
  • the embodiments of the present disclosure do not limit the execution order of charging operations and discharging operations included in the charging and discharging operations.
  • the charging operation can be performed first and then the discharging operation is performed, or the discharging operation can be performed first and then the charging operation is performed.
  • Step 102 If the first battery cell and the second battery cell are different, perform balancing processing on the battery cells in the energy storage system.
  • the core is not the minimum capacity cell. In this case, other cells reach the charging cut-off voltage first during the charging operation, and the minimum capacity cell is not yet fully charged. After that, the amount of electricity that the smallest-capacity battery cell can release during discharge is lower than its rated capacity. After the smallest-capacity battery cell is discharged first, other battery cells also stop discharging, resulting in the total capacity of the energy storage system not being fully utilized.
  • the cells in the energy storage system are charged and discharged, and the first cell that reaches the discharge cut-off voltage first during the discharging operation and the second cell that first reaches the charging cut-off voltage during the charging operation are determined. cells; if the first cell and the second cell are different, the cells in the energy storage system are balanced.
  • the battery cells in the energy storage system are balanced, so that the battery core that reaches the charging cut-off voltage first after the balancing process is Minimum capacity battery core, in this way, the capacity of the minimum capacity battery core can be fully utilized, thereby fully utilizing the total capacity of the energy storage system.
  • the embodiments of the present application may also include:
  • Step 103 If the first battery cell and the second battery cell are the same, determine that the battery cells in the energy storage system have reached a balanced state or stop balancing the battery cells in the energy storage system.
  • the minimum capacity battery core can be fully charged, and the capacity of the minimum capacity battery core can be fully utilized when discharging, thereby fully utilizing the total capacity of the energy storage system. At this time, it is determined that the cells in the energy storage system have reached a balanced state, or the balancing process of the cells in the energy storage system is stopped.
  • the minimum capacity is The cells can be fully charged, so that the capacity of the smallest capacity cell can be fully utilized, thereby fully utilizing the total capacity of the energy storage system.
  • the above-mentioned steps of equalizing the cells in the energy storage system may include:
  • Step 201 Determine the target cells in the energy storage system that meet the balancing conditions.
  • the battery core is searched according to the preset balancing conditions and the target battery cells that meet the balancing conditions are found.
  • the above-mentioned process of determining the target cells that meet the balancing conditions in the energy storage system may include: obtaining the cell voltage of each cell, and the voltage between each cell and the first cell. Cell voltage difference; determine the cell whose cell voltage is greater than the first voltage threshold and whose cell voltage difference is greater than the second voltage threshold as the target cell.
  • the energy storage system can obtain the cell voltage of each cell and calculate the cell voltage difference between each cell and the first cell. If the cell voltage of the cell is greater than the first voltage threshold and the cell voltage difference is greater than the second voltage threshold, the cell is determined to be a target cell to be balanced.
  • the first voltage threshold is 4.2V
  • the second voltage threshold is 60mV
  • the first cell is cell A
  • the energy storage system obtains the cell voltage of cell A as 4.21V
  • the cell voltage of cell B is 4.22V
  • it can be calculated that the cell voltage difference between cell B and cell A is 100mV
  • the cell voltage difference is greater than the second voltage threshold , determine cell B as the target cell to be balanced.
  • the cell voltage of each of the above cells may include the cell voltage of the first cell, or may not include the cell voltage of the first cell.
  • the embodiments of the present application do not limit this.
  • the above-mentioned first voltage threshold is determined based on the charging cut-off voltage of the energy storage system.
  • the charging cut-off voltage is 4.3V
  • the first voltage threshold can be set to 4.2V.
  • the embodiment of the present application does not limit the first voltage threshold.
  • the above-mentioned second voltage threshold is determined based on the maximum allowable voltage difference between the cells of the energy storage system.
  • the maximum allowable voltage difference between cells of the energy storage system is 60mV
  • the second voltage threshold can be set to 60mV.
  • the embodiment of the present application does not limit the second voltage threshold.
  • the target cell to be equalized can be accurately and quickly determined according to the first voltage threshold and the second voltage threshold, thereby improving equalization efficiency.
  • Step 202 Perform equalization processing on the target cells.
  • the energy storage system determines the target cell, it performs equalization processing on the target cell to reduce the cell voltage of the target cell.
  • the energy storage system determines that the target cells include cell B and cell C, it will perform equalization processing on cell B and cell C respectively.
  • the target cells in the energy storage system that meet the balancing conditions are determined, and the target cells are balanced.
  • the embodiment of the present application determines the target cell according to the balancing conditions, thereby performing targeted balancing processing, which can improve the efficiency of the balancing processing.
  • the above-mentioned steps of equalizing the target cells may include:
  • Step 301 Determine the target discharge duration based on the preset discharge amount.
  • the energy storage system can first obtain the preset discharge amount, for example, the preset discharge amount is 5% of the battery cell capacity.
  • the embodiment of the present application does not limit the preset discharge amount.
  • the energy storage system determines the time required to discharge the preset discharge amount from the target cell to obtain the target discharge duration. For example, if the target cell is discharged and the time required to reduce the power of the target cell by 5% is t, then the target discharge time is determined to be t.
  • Step 302 Discharge the target cells according to the target discharge duration.
  • the above-mentioned steps of discharging the target cells according to the target discharge duration include: using a balancing circuit set in the energy storage system to discharge the target cells and timing from the start of discharge; When the timing time reaches the target discharge time, stop discharging the target battery cell.
  • the energy storage system can be equipped with a balancing circuit.
  • the balancing circuit When discharging the target battery cell, the balancing circuit is used to discharge the target battery cell. Furthermore, the timing is started from the start of discharge, and when the timing reaches the target discharge duration, the discharge processing of the target battery cell is stopped.
  • the above-mentioned balancing loop may include a balancing resistor, and the embodiment of the present application does not limit the balancing loop. Understandably, the equalization process can be easily implemented using an equalization circuit.
  • the target discharge duration is determined based on the preset discharge amount; and the target battery core is discharged according to the target discharge duration.
  • the embodiment of the present application determines the target discharge duration to quantify the discharge processing of the target cells, making the equalization processing of the target cells easier to control.
  • the embodiment of the present application may also include the following steps:
  • Step 104 Perform charging and discharging operations on the cells in the energy storage system, and determine the third cell that reaches the discharge cut-off voltage first during the discharging operation, and the fourth cell that first reaches the charging cut-off voltage during the charging operation.
  • the energy storage system After balancing the target cells, the energy storage system charges and discharges the cells again. After discharging the battery cells in the energy storage system, record the third battery cell that reaches the discharge cut-off voltage first; after charging the battery cells in the energy storage system, record the fourth battery cell that reaches the charging cut-off voltage first. core.
  • the third battery cell that reaches the discharge cut-off voltage first is battery cell A; after the charging operation, the fourth battery cell that first reaches the charge cut-off voltage is battery cell C. Then again, the energy storage system The cells are balanced.
  • Step 105 If the third battery cell and the fourth battery cell are the same, determine that the battery cells in the energy storage system have reached a balanced state or stop balancing the battery cells in the energy storage system.
  • the third battery cell and the fourth battery cell are the same battery cell, it means that the battery core that reaches the discharge cut-off voltage first and the battery core that reaches the charge cut-off voltage first are both the smallest capacity battery cells.
  • the minimum capacity battery core can be fully charged, and the capacity of the minimum capacity battery core can be fully utilized when discharging, thereby fully utilizing the total capacity of the energy storage system.
  • the battery cells in the energy storage system are charged and discharged, and the third battery cell that reaches the discharge cut-off voltage first during the discharging operation and the fourth battery cell that reaches the charging cut-off voltage first during the charging operation are determined;
  • the third battery cell and the fourth battery cell are the same, it is determined that the battery cells in the energy storage system have reached a balanced state or the balancing process of the battery cells in the energy storage system is stopped.
  • the minimum capacity battery it is reasonable to stop the balancing after determining that the battery cell that reaches the discharge cut-off voltage first and the battery cell that first reaches the charging cut-off voltage is the minimum capacity battery, so that the minimum capacity battery core can be fully charged after the balancing process, so that the minimum capacity can be fully utilized.
  • the capacity of the battery cells thereby making full use of the total capacity of the energy storage system.
  • embodiments of the present application also provide a cell balancing device for implementing the above-mentioned cell balancing method.
  • the solution to the problem provided by this device is similar to the solution recorded in the above method. Therefore, the specific limitations in the embodiments of one or more cell balancing devices provided below can be found in the above description of the cell balancing method. Limitations will not be repeated here.
  • a cell balancing device which includes:
  • the first battery cell determination module 301 is used to charge and discharge the battery cells in the energy storage system, and determine the first battery cell that reaches the discharge cut-off voltage first during the discharge operation, and the first battery cell that reaches the charge cut-off voltage first during the charging operation.
  • the balancing processing module 302 is used to perform balancing processing on the battery cells in the energy storage system if the first battery core and the second battery core are different.
  • the balancing processing module 302 is specifically used to determine the target cells in the energy storage system that meet the balancing conditions; and perform balancing processing on the target cells.
  • the device further includes:
  • the first balancing stop module 303 is used to determine that the battery cells in the energy storage system have reached a balanced state or to stop balancing the battery cells in the energy storage system when the first battery cell and the second battery cell are the same.
  • the device further includes:
  • the second battery cell determination module 304 is used to perform charging and discharging operations on the battery cells in the energy storage system, and determine the third battery cell that reaches the discharge cut-off voltage first during the discharge operation, and the first battery cell that reaches the charging cut-off voltage during the charging operation.
  • the second balancing stop module 305 is used to determine that the battery cells in the energy storage system have reached a balanced state or to stop balancing the battery cells in the energy storage system when the third battery cell and the fourth battery cell are the same.
  • the equalization processing module 302 is specifically used to obtain the cell voltage of each cell and the cell voltage difference between each cell and the first cell; A voltage threshold, and the cell whose cell voltage difference is greater than the second voltage threshold is determined as the target cell.
  • the first voltage threshold is determined based on the charging cut-off voltage of the energy storage system
  • the second voltage threshold is determined based on the maximum allowable voltage difference between cells of the energy storage system.
  • the equalization processing module 302 is specifically configured to determine the target discharge duration according to the preset discharge amount; and perform discharge processing on the target cells according to the target discharge duration.
  • the equalization processing module 302 is specifically configured to use the equalization loop set up in the energy storage system to perform discharge processing on the target cells, and time the time from the start of the discharge; when the timing time reaches the target discharge time, Stop discharging the target cell.
  • Each module in the above-mentioned cell balancing device can be realized in whole or in part through software, hardware and combinations thereof.
  • Each of the above modules can be embedded in or independent of the processor in the electronic device in the form of hardware, or can be stored in the memory of the electronic device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.
  • an electronic device is provided, the internal structure diagram of which can be shown in Figure 9.
  • the computer device includes a processor, memory, communication interface, display screen and input device connected through a system bus.
  • the processor of the computer device is used to provide computing and control capabilities.
  • the memory of the computer device includes non-volatile storage media and internal memory.
  • the non-volatile storage medium stores operating systems and computer programs.
  • This internal memory provides an environment for the execution of operating systems and computer programs in non-volatile storage media.
  • the communication interface of the computer device is used for wired or wireless communication with external terminals.
  • the wireless mode can be implemented through WIFI, mobile cellular network, NFC (Near Field Communication) or other technologies.
  • the computer program implements a cell balancing method when executed by the processor.
  • the display screen of the computer device may be a liquid crystal display or an electronic ink display.
  • the input device of the computer device may be a touch layer covered on the display screen, or may be a button, trackball or touch pad provided on the computer device shell. , it can also be an external keyboard, trackpad or mouse, etc.
  • Figure 9 is only a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer equipment to which the solution of the present application is applied.
  • Specific computer equipment can May include more or fewer parts than shown, or combine certain parts, or have a different arrangement of parts.
  • a non-transitory computer-readable storage medium including instructions such as a memory including instructions, is also provided, and the instructions can be executed by a processor of an electronic device to complete the above method.
  • 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.
  • a computer program product is also provided.
  • the above method can be implemented.
  • the computer program product includes one or more computer instructions.
  • these computer instructions are loaded and executed on a computer, some or all of the above methods may be implemented in whole or in part according to the processes or functions described in the embodiments of the present disclosure.
  • Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc.
  • Volatile memory may include random access memory (RAM) or external cache memory.
  • RAM can be in many forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM).

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Abstract

本申请涉及一种电芯均衡方法、装置、电子设备和存储介质。所述方法包括：对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第一电芯，以及充电操作中最先达到充电截止电压的第二电芯；若所述第一电芯与所述第二电芯不同，则对所述储能系统中的电芯进行均衡处理。采用本申请能够充分利用最小容量电芯的电量以及储能系统的总容量。

Description

电芯均衡方法、装置、电子设备和存储介质 技术领域
本申请涉及电芯技术领域，具体涉及一种电芯均衡方法、装置、电子设备和存储介质。
背景技术
随着新能源技术的飞速发展，储能系统成为了新能源领域中比较重要的研究方向之一。储能系统包括多个电芯，电芯之间可能存在容量差异，存在一个容量最小的电芯。
通常情况下，储能系统中的一个电芯达到充电截止电压，则储能系统中的电芯均停止充电；一个电芯达到放电截止电压，则储能系统中的电芯均停止放电。在其他电芯先达到充电截止电压而最小容量电芯未达到充电截止电压的情况，最小容量电芯未充满。之后，最小容量电芯在放电时所能释放的电量低于其额定容量，导致储能系统的总容量未被充分利用。
发明内容
基于上述问题，本申请提供一种电芯均衡方法、装置、电子设备和存储介质，能够充分利用最小容量电芯的电量以及储能系统的总容量。
第一方面，本申请提供了一种电芯均衡方法，该方法包括：对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第一电芯，以及充电操作中最先达到充电截止电压的第二电芯；若第一电芯与第二电芯不同，则对储能系统中的电芯进行均衡处理。
本申请实施例的技术方案中，如果最先达到放电截止电压的第一电芯和最先达到充电截止电压的第二电芯不同，则可以确定最先达到充电截止电压的电芯不是最小容量电芯，在这种情况下，需要对储能系统中的电芯进行均衡处理，使得均衡处理后最先达到充电截止电压的电芯为最小容量电芯，这样，可以充分利用最小容量电芯的容量，进而充分利用储能系统的总容量。
在一些实施例中，该方法还包括：在第一电芯与第二电芯相同的情况下，确定储能系统中的电芯达到均衡状态或者停止对储能系统中的电芯进行均衡处理。
本申请实施例的技术方案中，确定达到均衡状态或停止进行均衡处理后，最小容量电芯可以充满，这样，可以充分利用最小容量电芯的容量，进而充分利用储能系统的总容量。
在一些实施例中，上述对储能系统中的电芯进行均衡处理，包括：确定储能系统中符合均衡条件的目标电芯；对目标电芯进行均衡处理。
本申请实施例的技术方案中，根据均衡条件确定目标电芯，从而进行针对性的均衡处理，可以提高均衡处理的效率。
在一些实施例中，在对目标电芯进行均衡处理之后，该方法还包括：对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第三电芯，以及充电操作中最先达到充电截止电压的第四电芯；在第三电芯与第四电芯相同的情况下，确定储能系统中的电芯达到均衡状态或者停止对储能系统中的电芯进行均衡处理。
本申请实施例的技术方案中，在确定最先达到放电截止电压的电芯和最先达到充电截止电压为最小容量电芯后停止均衡合理，使得均衡处理后最小容量电芯可以充满，这样，可以充分利用最小容量电芯的容量，进而充分利用储能系统的总容量。
在一些实施例中，上述确定储能系统中符合均衡条件的目标电芯，包括：获取各电芯的电芯电压，以及各电芯与第一电芯之间的电芯电压差值；将电芯电压大于第一电压阈值，且电芯电压差值大于第二电压阈值的电芯确定为目标电芯。
本申请实施例的技术方案中，根据第一电压阈值和第二电压阈值可以准确快速地确定待均衡处理的目标电芯，从而提高均衡效率。
在一些实施例中，第一电压阈值根据储能系统的充电截止电压确定，第二电压阈值根据储能系统电芯之间的最大容许电压差值确定。
在一些实施例中，上述对目标电芯进行均衡处理，包括：根据预设放电量 确定目标放电时长；按照目标放电时长对目标电芯进行放电处理。
本申请实施例的技术方案中，确定目标放电时长可以量化目标电芯的放电处理，使得目标电芯的均衡处理更容易控制。
在一些实施例中，上述按照目标放电时长对目标电芯进行放电处理，包括：利用储能系统中设置的均衡回路对目标电芯进行放电处理，并从放电开始时计时；在计时时长达到目标放电时长时，停止对目标电芯进行放电处理。
本申请实施例的技术方案中，利用均衡电路可以很容易地实现均衡处理。
第二方面，本申请还提供了一种电芯均衡装置，该装置包括：
第一电芯确定模块，用于对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第一电芯，以及充电操作中最先达到充电截止电压的第二电芯；
均衡处理模块，用于若第一电芯与第二电芯不同，则对储能系统中的电芯进行均衡处理。
在本申请的一些实施例中，均衡处理模块，具体用于确定储能系统中符合均衡条件的目标电芯；对目标电芯进行均衡处理。
在本申请的一些实施例中，该装置还包括：
第一均衡停止模块，用于在所述第一电芯与所述第二电芯相同的情况下，确定所述储能系统中的电芯达到均衡状态或者停止对所述储能系统中的电芯进行均衡处理。
在本申请的一些实施例中，该装置还包括：
第二电芯确定模块，用于对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第三电芯，以及充电操作中最先达到充电截止电压的第四电芯；
第二均衡停止模块，用于在第三电芯与第四电芯相同的情况下，确定储能系统中的电芯达到均衡状态或者停止对储能系统中的电芯进行均衡处理。
在本申请的一些实施例中，均衡处理模块，具体用于获取各电芯的电芯电压，以及各电芯与第一电芯之间的电芯电压差值；将电芯电压大于第一电压阈值，且电芯电压差值大于第二电压阈值的电芯确定为目标电芯。
在本申请的一些实施例中，第一电压阈值根据储能系统的充电截止电压确定，第二电压阈值根据储能系统电芯之间的最大容许电压差值确定。
在本申请的一些实施例中，均衡处理模块，具体用于根据预设放电量确定目标放电时长；按照目标放电时长对目标电芯进行放电处理。
在本申请的一些实施例中，均衡处理模块，具体用于利用储能系统中设置的均衡回路对目标电芯进行放电处理，并从放电开始时计时；在计时时长达到目标放电时长时，停止对目标电芯进行放电处理。
第三方面，本申请还提供了一种电子设备，包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现上述第一方面所述的方法。
第四方面，本申请实施例提供一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器执行时实现上述第一方面所述的方法。
第五方面，本申请实施例提供一种计算机程序产品，包括计算机程序，该计算机程序被处理器执行时实现上述第一方面所述的方法。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读对下文可选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出可选实施方式的目的，而并不认为是对本申请的限制。而且在全部附图中，用相同的附图标号表示相同的部件。在附图中：
图1为本申请一些实施例的电芯均衡方法的流程示意图；
图2是本申请一些实施例的电芯均衡方法的流程示意图；
图3是本申请一些实施例的对储能系统中的电芯进行均衡处理步骤的流程示意图；
图4是本申请一些实施例的对目标电芯进行均衡处理步骤的流程示意图；
图5为本申请一些实施例的电芯均衡方法的流程示意图；
图6为本申请一些实施例的电芯均衡装置的结构框图；
图7为本申请一些实施例的电芯均衡装置的结构框图；
图8为本申请一些实施例的电芯均衡装置的结构框图；
图9为本申请一些实施例中电子设备的内部结构图。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
目前，储能系统成为了新能源领域中比较重要的研究方向之一。储能系统包括多个电芯，电芯之间可能存在容量差异，存在一个容量最小的电芯。通常情况下，储能系统中的一个电芯达到充电截止电压，则储能系统中的电芯均停止充电；一个电芯达到放电截止电压，则储能系统中的电芯均停止放电。在其他电芯先达到充电截止电压而最小容量电芯未达到充电截止电压的情况，最小容量电芯未充满。之后，最小容量电芯在放电时所能释放的电量低于其额定容量，导致储能系统的总容量未被充分利用。
在本申请实施例提供的电芯均衡方案中，对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第一电芯，以及充电操作中最先达到充电截止电压的第二电芯；若第一电芯与第二电芯不同，则对储能系统中的电芯进行均衡处理。本申请实施例中，如果最先达到放电截止电压的第一电芯和最先达到充电截止电压的第二电芯不同，则可以确定最先达到充电截止电压的电芯不是最小容量电芯，在这种情况下，需要对储能系统中的电芯进行均衡处理，使得均衡处理后最先达到充电截止电压的电芯为最小容量电芯，这样，可以充分利用最小容量电芯的容量，进而充分利用储能系统的总容量。
本申请实施例公开的电芯和储能系统可以但不限用于车辆、船舶或飞行器等用电装置中，从而给用电装置提供电能，并且本申请实施例中公开的电芯和储能系统也可以与电网连接，从而将存储的电能输出到电网。
根据本申请的一些实施例，参照图1，提供了一种电芯均衡方法，以该方法 应用于储能系统为例，可以包括如下步骤：
步骤101，对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第一电芯，以及充电操作中最先达到充电截止电压的第二电芯。
储能系统包括多个电芯，对储能系统中的电芯进行放电操作，在其中一个电芯最先达到放电截止电压时，停止所有电芯的放电操作。之后，记录最先达到放电截止电压的第一电芯。
对储能系统中的电芯进行充电操作，在其中一个电芯最先达到充电截止电压时，停止所有电芯的充电操作。之后，记录最先达到充电截止电压的第二电芯。
例如，放电操作后，最先达到放电截止电压的第一电芯为电芯A；充电操作后，最先达到充电截止电的第二电芯为电芯B。
值得说明的是，本公开实施例并不限定充放电操作所包括的充电操作和放电操作的执行顺序。例如可以先执行充电操作再执行放电操作，还可以先执行放电操作再执行充电操作。
步骤102，若第一电芯与第二电芯不同，则对储能系统中的电芯进行均衡处理。
判断第一电芯与第二电芯是否为同一电芯，如果第一电芯与第二电芯不是同一电芯，表明最先达到放电截止电压的电芯与最先达到充电截止电压的电芯不是最小容量电芯。在这种情况下，充电操作中其他电芯最先达到充电截止电压，最小容量电芯还未充满。之后，最小容量电芯在放电时所能释放的电量低于其额定容量，而最小容量电芯最先放电完毕后，其他电芯也停止放电，导致储能系统的总容量不能被充分利用。因此，需要对储能系统中的电芯进行均衡处理，使得均衡处理后最先达到充电截止电压的电芯为最小容量电芯，这样，可以充分利用最小容量电芯的容量，延迟放电时长，进而充分利用储能系统的总容量。
上述电芯均衡方法中，对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第一电芯，以及充电操作中最先达到充电截止电压的第二电芯；若第一电芯与第二电芯不同，则对储能系统中的电芯进行均衡 处理。本申请实施例在确定最先达到充电截止电压的电芯不是最小容量电芯的情况下，对储能系统中的电芯进行均衡处理，使得均衡处理后最先达到充电截止电压的电芯为最小容量电芯，这样，可以充分利用最小容量电芯的容量，进而充分利用储能系统的总容量。
根据本申请的一些实施例，如图2所示，本申请实施例还可以包括：
步骤103，在第一电芯与第二电芯相同的情况下，确定储能系统中的电芯达到均衡状态或者停止对储能系统中的电芯进行均衡处理。
如果第一电芯与第二电芯为同一电芯，表明最先达到放电截止电压的电芯与最先达到充电截止电的电芯均为最小容量电芯。在这种情况下，最小容量电芯可以充满，放电时才能充分利用最小容量电芯的容量，进而充分利用储能系统的总容量。此时，确定储能系统中的电芯达到均衡状态，或者停止对储能系统中的电芯进行均衡处理。
上述实施例中，在第一电芯与第二电芯相同的情况下，确定储能系统中的电芯达到均衡状态或者停止对储能系统中的电芯进行均衡处理，均衡处理后最小容量电芯可以充满，这样，可以充分利用最小容量电芯的容量，进而充分利用储能系统的总容量。
根据本申请的一些实施例，如图3所示，上述对储能系统中的电芯进行均衡处理的步骤，可以包括：
步骤201，确定储能系统中符合均衡条件的目标电芯。
在对储能系统中的电芯进行均衡处理时，根据预设的均衡条件进行电芯查找，查找到符合均衡条件的目标电芯。
在本申请的一些实施例中，上述确定储能系统中符合均衡条件的目标电芯的过程，可以包括：获取各电芯的电芯电压，以及各电芯与第一电芯之间的电芯电压差值；将电芯电压大于第一电压阈值，且电芯电压差值大于第二电压阈值的电芯确定为目标电芯。
储能系统可以获取各电芯的电芯电压，并计算各电芯与第一电芯之间的电 芯电压差值。如果电芯的电芯电压大于第一电压阈值，并且电芯电压差值大于第二电压阈值，则将该电芯确定为待进行均衡处理的目标电芯。
例如，第一电压阈值为4.2V，第二电压阈值为60mV，第一电芯为电芯A，储能系统获取到电芯A的电芯电压为4.21V，电芯B的电芯电压为4.22V，可以计算出电芯B与电芯A之间的电芯电压差值为100mV，则确定电芯B的电芯电压大于第一电压阈值，并且电芯电压差值大于第二电压阈值，将电芯B确定为待均衡处理的目标电芯。
上述各电芯的电芯电压，可以包括第一电芯的电芯电压，也可以不包括第一电芯的电芯电压。本申请实施例对此不做限定。
上述第一电压阈值根据储能系统的充电截止电压确定。例如，充电截止电压为4.3V，可以将第一电压阈值设置为4.2V。本申请实施例对第一电压阈值不做限定。
上述第二电压阈值根据储能系统电芯之间的最大容许电压差值确定。例如，储能系统电芯之间的最大容许电压差值为60mV，可以将第二电压阈值设置为60mV。本申请实施例对第二电压阈值不做限定。
可以理解地，根据第一电压阈值和第二电压阈值可以准确快速地确定待均衡处理的目标电芯，从而提高均衡效率。
步骤202，对目标电芯进行均衡处理。
储能系统确定目标电芯后，对目标电芯进行均衡处理，降低目标电芯的电芯电压。
例如，储能系统确定目标电芯包括电芯B和电芯C，则分别对电芯B和电芯C进行均衡处理。
上述实施例中，确定储能系统中符合均衡条件的目标电芯，对目标电芯进行均衡处理。本申请实施例根据均衡条件确定目标电芯，从而进行针对性的均衡处理，可以提高均衡处理的效率。
根据本申请的一些实施例，如图4所示，上述对目标电芯进行均衡处理的步骤，可以包括：
步骤301，根据预设放电量确定目标放电时长。
储能系统可以先获取预设放电量，例如，预设放电量为电芯容量的5％。本申请实施例对预设放电量不做限定。
在对目标电芯进行均衡处理时，储能系统确定将目标电芯放出预设放电量所需的时长，得到目标放电时长。例如，对目标电芯进行放电处理，使目标电芯的电量减少5％需要的时长为t，则确定目标放电时长为t。
步骤302，按照目标放电时长对目标电芯进行放电处理。
确定目标放电时长后，按照目标放电时长对目标电芯进行放电处理。
在本申请的一些实施例中，上述按照目标放电时长对目标电芯进行放电处理的步骤，包括：利用储能系统中设置的均衡回路对目标电芯进行放电处理，并从放电开始时计时；在计时时长达到目标放电时长时，停止对目标电芯进行放电处理。
储能系统可以设置均衡回路，在对目标电芯进行放电处理时，利用均衡回路对目标电芯进行放电处理。并且，从放电开始时计时，在计时时长达到目标放电时长时，停止对目标电芯进行放电处理。
上述均衡回路可以包括均衡电阻，本申请实施例对均衡回路不做限定。可以理解地，利用均衡电路可以很容易地实现均衡处理。
上述实施例中，根据预设放电量确定目标放电时长；按照目标放电时长对目标电芯进行放电处理。本申请实施例确定目标放电时长可以量化目标电芯的放电处理，使得目标电芯的均衡处理更容易控制。
根据本申请的一些实施例，如图5所示，本申请实施例还可以包括如下步骤：
步骤104，对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第三电芯，以及充电操作中最先达到充电截止电压的第四电芯。
在对目标电芯进行均衡处理后，储能系统再次对电芯进行充放电操作。对储能系统中的电芯进行放电操作后，记录最先达到放电截止电压的第三电芯；对储能系统中的电芯进行充电操作后，记录最先达到充电截止电压的第四电芯。
判断第三电芯与第四电芯是否为同一电芯，如果第三电芯与第四电芯不是同一电芯，则再次对储能系统中的电芯进行均衡处理。
例如，放电操作后，最先达到放电截止电压的第三电芯为电芯A；充电操作后，最先达到充电截止电的第四电芯为电芯C，则再次对储能系统中的电芯进行均衡处理。
步骤105，在第三电芯与第四电芯相同的情况下，确定储能系统中的电芯达到均衡状态或者停止对储能系统中的电芯进行均衡处理。
如果第三电芯与第四电芯为同一电芯，表明最先达到放电截止电压的电芯与最先达到充电截止电的电芯均为最小容量电芯。在这种情况下，最小容量电芯可以充满，放电时才能充分利用最小容量电芯的容量，进而充分利用储能系统的总容量。此时，确定储能系统中的电芯达到均衡状态，或者停止对储能系统中的电芯进行均衡处理。
上述实施例中，对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第三电芯，以及充电操作中最先达到充电截止电压的第四电芯；在第三电芯与第四电芯相同的情况下，确定储能系统中的电芯达到均衡状态或者停止对储能系统中的电芯进行均衡处理。本申请实施例在确定最先达到放电截止电压的电芯和最先达到充电截止电压为最小容量电芯后停止均衡合理，使得均衡处理后最小容量电芯可以充满，这样，可以充分利用最小容量电芯的容量，进而充分利用储能系统的总容量。
应该理解的是，虽然上述流程图中的各个步骤按照箭头的指示依次显示，但是这些步骤并不是必然按照箭头指示的顺序依次执行。除非本文中有明确的说明，这些步骤的执行并没有严格的顺序限制，这些步骤可以以其它的顺序执行。而且，上述图中的至少一部分步骤可以包括多个步骤或者多个阶段，这些步骤或者阶段并不必然是在同一时刻执行完成，而是可以在不同的时刻执行，这些步骤或者阶段的执行顺序也不必然是依次进行，而是可以与其它步骤或者其它步骤中的步骤或者阶段的至少一部分轮流或者交替地执行。
基于同样的发明构思，本申请实施例还提供了一种用于实现上述所涉及的 电芯均衡方法的电芯均衡装置。该装置所提供的解决问题的实现方案与上述方法中所记载的实现方案相似，故下面所提供的一个或多个电芯均衡装置实施例中的具体限定可以参见上文中对于电芯均衡方法的限定，在此不再赘述。
根据本申请的一些实施例，如图6所示，提供了一种电芯均衡装置，该装置包括：
第一电芯确定模块301，用于对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第一电芯，以及充电操作中最先达到充电截止电压的第二电芯；
均衡处理模块302，用于若第一电芯与第二电芯不同，则对储能系统中的电芯进行均衡处理。
在本申请的一些实施例中，均衡处理模块302，具体用于确定储能系统中符合均衡条件的目标电芯；对目标电芯进行均衡处理。
在本申请的一些实施例中，如图7所示，该装置还包括：
第一均衡停止模块303，用于在第一电芯与第二电芯相同的情况下，确定储能系统中的电芯达到均衡状态或者停止对储能系统中的电芯进行均衡处理。
在本申请的一些实施例中，如图8所示，该装置还包括：
第二电芯确定模块304，用于对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第三电芯，以及充电操作中最先达到充电截止电压的第四电芯；
第二均衡停止模块305，用于在第三电芯与第四电芯相同的情况下，确定储能系统中的电芯达到均衡状态或者停止对储能系统中的电芯进行均衡处理。
在本申请的一些实施例中，均衡处理模块302，具体用于获取各电芯的电芯电压，以及各电芯与第一电芯之间的电芯电压差值；将电芯电压大于第一电压阈值，且电芯电压差值大于第二电压阈值的电芯确定为目标电芯。
在本申请的一些实施例中，第一电压阈值根据储能系统的充电截止电压确定，第二电压阈值根据储能系统电芯之间的最大容许电压差值确定。
在本申请的一些实施例中，均衡处理模块302，具体用于根据预设放电量确定目标放电时长；按照目标放电时长对目标电芯进行放电处理。
在本申请的一些实施例中，均衡处理模块302，具体用于利用储能系统中设置的均衡回路对目标电芯进行放电处理，并从放电开始时计时；在计时时长达到目标放电时长时，停止对目标电芯进行放电处理。
关于电芯均衡装置的具体限定可以参见上文中对于电芯均衡方法的限定，在此不再赘述。上述电芯均衡装置中的各个模块可全部或部分通过软件、硬件及其组合来实现。上述各模块可以以硬件形式内嵌于或独立于电子设备中的处理器中，也可以以软件形式存储于电子设备中的存储器中，以便于处理器调用执行以上各个模块对应的操作。
根据本申请的一些实施例，提供了一种电子设备，其内部结构图可以如图9所示。该计算机设备包括通过系统总线连接的处理器、存储器、通信接口、显示屏和输入装置。其中，该计算机设备的处理器用于提供计算和控制能力。该计算机设备的存储器包括非易失性存储介质、内存储器。该非易失性存储介质存储有操作系统和计算机程序。该内存储器为非易失性存储介质中的操作系统和计算机程序的运行提供环境。该计算机设备的通信接口用于与外部的终端进行有线或无线方式的通信，无线方式可通过WIFI、移动蜂窝网络、NFC(近场通信)或其他技术实现。该计算机程序被处理器执行时以实现一种电芯均衡方法。该计算机设备的显示屏可以是液晶显示屏或者电子墨水显示屏，该计算机设备的输入装置可以是显示屏上覆盖的触摸层，也可以是计算机设备外壳上设置的按键、轨迹球或触控板，还可以是外接的键盘、触控板或鼠标等。
本领域技术人员可以理解，图9中示出的结构，仅仅是与本申请方案相关的部分结构的框图，并不构成对本申请方案所应用于其上的计算机设备的限定，具体的计算机设备可以包括比图中所示更多或更少的部件，或者组合某些部件，或者具有不同的部件布置。
根据本申请的一些实施例，还提供了一种包括指令的非临时性计算机可读存储介质，例如包括指令的存储器，上述指令可由电子设备的处理器执行以完成上述方法。例如，所述非临时性计算机可读存储介质可以是ROM、随机存取存储器(RAM)、CD-ROM、磁带、软盘和光数据存储设备等。
根据本申请的一些实施例，还提供了一种计算机程序产品，该计算机程序被处理器执行时，可以实现上述方法。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行这些计算机指令时，可以全部或部分地按照本公开实施例所述的流程或功能实现上述方法中的部分或者全部。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，所述的计算机程序可存储于一非易失性计算机可读取存储介质中，该计算机程序在执行时，可包括如上述各方法的实施例的流程。其中，本公开实施例所提供的各实施例中所使用的对存储器、存储、数据库或其它介质的任何引用，均可包括非易失性和易失性存储器中的至少一种。非易失性存储器可包括只读存储器(Read-Only Memory，ROM)、磁带、软盘、闪存或光存储器等。易失性存储器可包括随机存取存储器(Random Access Memory，RAM)或外部高速缓冲存储器。作为说明而非局限，RAM可以是多种形式，比如静态随机存取存储器(Static Random Access Memory，SRAM)或动态随机存取存储器(Dynamic Random Access Memory，DRAM)等。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，便于具体和详细地理解本申请的技术方案，但并不能因此而理解为对发明专利保护范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。应当理解，本领域技术人员在本申请提供的技术方案的基础上，通过合乎逻辑的分析、推理或者有限的试验得到的技术方案，均在本申请所述附权利要求的保护范围内。因此，本申请专利的保护范围应以所附权利要求的内容为准，说明书及附图可以用于解释权利要求的内容。

Claims (14)

  1. 一种电芯均衡方法，其特征在于，所述方法包括：
    对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第一电芯，以及充电操作中最先达到充电截止电压的第二电芯；
    若所述第一电芯与所述第二电芯不同，则对所述储能系统中的电芯进行均衡处理。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    在所述第一电芯与所述第二电芯相同的情况下，确定所述储能系统中的电芯达到均衡状态或者停止对所述储能系统中的电芯进行均衡处理。
  3. 根据权利要求1所述的方法，其特征在于，所述对所述储能系统中的电芯进行均衡处理，包括：
    确定所述储能系统中符合均衡条件的目标电芯；
    对所述目标电芯进行均衡处理。
  4. 根据权利要求3所述的方法，其特征在于，在所述对所述目标电芯进行均衡处理之后，所述方法还包括：
    对所述储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第三电芯，以及充电操作中最先达到充电截止电压的第四电芯；
    在所述第三电芯与所述第四电芯相同的情况下，确定所述储能系统中的电芯达到均衡状态或者停止对所述储能系统中的电芯进行均衡处理。
  5. 根据权利要求3或4所述的方法，其特征在于，所述确定所述储能系统中符合均衡条件的目标电芯，包括：
    获取所述储能系统中的各所述电芯的电芯电压，以及各所述电芯与所述第一电芯之间的电芯电压差值；
    将所述电芯电压大于第一电压阈值，且所述电芯电压差值大于第二电压阈值的所述电芯确定为所述目标电芯。
  6. 根据权利要求5所述的方法，其特征在于，所述第一电压阈值根据所述储能系统的充电截止电压确定，所述第二电压阈值根据所述储能系统电芯之间的最大容许电压差值确定。
  7. 根据权利要求3所述的方法，其特征在于，所述对所述目标电芯进行均 衡处理，包括：
    根据预设放电量确定目标放电时长；
    按照所述目标放电时长对所述目标电芯进行放电处理。
  8. 根据权利要求7所述的方法，其特征在于，所述按照所述目标放电时长对所述目标电芯进行放电处理，包括：
    利用所述储能系统中设置的均衡回路对所述目标电芯进行放电处理，并从放电开始时计时；
    在计时时长达到所述目标放电时长时，停止对所述目标电芯进行放电处理。
  9. 一种电芯均衡装置，其特征在于，所述装置包括：
    第一电芯确定模块，用于对储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第一电芯，以及充电操作中最先达到充电截止电压的第二电芯；
    均衡处理模块，用于若所述第一电芯与所述第二电芯不同，则对所述储能系统中的电芯进行均衡处理。
  10. 根据权利要求9所述的装置，其特征在于，所述装置还包括：
    第一均衡停止模块，用于在所述第一电芯与所述第二电芯相同的情况下，确定所述储能系统中的电芯达到均衡状态或者停止对所述储能系统中的电芯进行均衡处理。
  11. 根据权利要求9所述的装置，其特征在于，所述均衡处理模块，具体用于确定所述储能系统中符合均衡条件的目标电芯；对所述目标电芯进行均衡处理。
  12. 根据权利要求9所述的装置，其特征在于，所述装置还包括：
    第二电芯确定模块，用于对所述储能系统中的电芯进行充放电操作，确定放电操作中最先达到放电截止电压的第三电芯，以及充电操作中最先达到充电截止电压的第四电芯；
    第二均衡停止模块，用于在所述第三电芯与所述第四电芯相同的情况下，确定所述储能系统中的电芯达到均衡状态或者停止对所述储能系统中的电芯进 行均衡处理。
  13. 一种电子设备，包括存储器和处理器，所述存储器存储有计算机程序，其特征在于，所述处理器执行所述计算机程序时实现权利要求1至8中任一项所述的方法的步骤。
  14. 一种计算机可读存储介质，其上存储有计算机程序，其特征在于，所述计算机程序被处理器执行时实现权利要求1至8中任一项所述的方法的步骤。
PCT/CN2022/094467 2022-05-23 2022-05-23 电芯均衡方法、装置、电子设备和存储介质 WO2023225795A1 (zh)

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