Battery capacity determination method and device, electronic equipment and storage medium

Abstract

The invention provides a battery capacity determination method and device, electronic equipment and a storage medium. The method comprises the following steps: charging a plurality of target batteries according to a target charging method; carrying out first capacity grading discharge on the plurality of target batteries according to the first discharge current to obtain a first electric quantity, and then carrying out second capacity grading discharge according to the second discharge current to obtain a second electric quantity; charging the plurality of target batteries according to the target charging method, performing third capacity grading discharging on the plurality of target batteries according to the first discharging current, and then performing fourth capacity grading discharging on the plurality of target batteries according to the second discharging current to obtain third electric quantity; and determining target power based on the first power, the second power and the third power. Therefore, the influence that the capacity of the battery is not consistent with the actual capacity due to high temperature rise of the battery caused by much heat generated by an instrument or large discharge current can be reduced, and the accuracy of the finally measured target electric quantity is improved, so that the material cost of battery manufacturing is controlled.

Description

Technical Field

[0001] The present disclosure relates to the technical field of energy storage batteries, and in particular to a method and device for determining battery capacity, an electronic device, and a storage medium. Background Art

[0002] With the development of science and technology, lithium batteries are widely used in various electronic devices, electric vehicles and other fields due to their high energy density, long cycle life and environmental protection. Among them, lithium iron phosphate batteries have become one of the mainstream products in the lithium battery market due to their good safety performance, low cost and environmental protection. However, the capacity of lithium iron phosphate batteries is affected by many factors, such as temperature, charge and discharge rate, aging degree, etc., which brings challenges to the use and management of batteries. Therefore, accurate battery capacity testing and calibration technology is crucial for battery performance evaluation and optimization management.

[0003] There are some problems with the battery capacity testing and calibration techniques in current technology. First, these methods usually take a long time because the battery needs to be charged and discharged many times to reach a stable state, which brings inconvenience to the rapid detection and use of the battery. Secondly, the test results of these methods are easily affected by factors such as the degree of battery aging and ambient temperature, which affects the accuracy of the test results. In addition, the calculation process of these methods is complicated and requires professional equipment and technicians, which also increases the cost of battery capacity testing and calibration. Summary of the invention

[0004] The present disclosure aims to solve one of the technical problems in the related art at least to some extent.

[0005] To this end, an object of the present disclosure is to provide a method for determining battery capacity.

[0006] A second objective of the present disclosure is to provide a battery capacity determination device.

[0007] A third objective of the present disclosure is to provide an electronic device.

[0008] A fourth object of the present disclosure is to provide a non-transitory computer-readable storage medium.

[0009] A fifth object of the present disclosure is to provide a computer program product.

[0010] To achieve the above-mentioned purpose, the first aspect of the present disclosure proposes a battery capacity determination method, including: obtaining multiple target batteries, and charging the multiple target batteries respectively according to a target charging method; performing a first capacity-divided discharge on the multiple target batteries after charging according to a first discharge current to obtain a first quantity of electricity after the first capacity-divided discharge, and then performing a second capacity-divided discharge on the multiple target batteries after the first capacity-divided discharge according to a second discharge current to obtain a second quantity of electricity after the second capacity-divided discharge, wherein the first discharge current is greater than the second discharge current; charging the multiple target batteries after the second capacity-divided discharge according to the target charging method, and performing a third capacity-divided discharge on the multiple target batteries after charging according to the first discharge current, and then performing a fourth capacity-divided discharge on the multiple target batteries after the third capacity-divided discharge according to the second discharge current to obtain a third quantity of electricity after the fourth capacity-divided discharge, wherein the discharge time of the first capacity-divided discharge is the same as the discharge time of the third capacity-divided discharge, and the discharge time of the second capacity-divided discharge is the same as the discharge time of the fourth capacity-divided discharge; and determining the target quantity of each of the multiple target batteries based on the first quantity of electricity, the second quantity of electricity, and the third quantity of electricity.

[0011] According to one embodiment of the present disclosure, determining the target power of each of the multiple target batteries based on the first power, the second power, and the third power includes: calculating the average value of the third power of the multiple target batteries to obtain an average third power; and for any target battery among the multiple target batteries, calculating the target power based on the average third power and the first power and the second power of the target battery.

[0012] According to one embodiment of the present disclosure, the target power of the target battery is calculated based on the average third power and the first power and the second power of the target battery, including: adding the first power and the second power to calculate a fourth power; subtracting the fourth power from the average third power to calculate the target power of the target battery.

[0013] According to one embodiment of the present disclosure, the target charging method is to charge at a set constant current for a set time according to a set charging current.

[0014] According to one embodiment of the present disclosure, the first divided capacity discharge and the third divided capacity discharge are discharged to a first set voltage according to the first discharge current, and the second divided capacity discharge and the fourth divided capacity discharge are discharged to a second set voltage according to the second discharge current.

[0015] According to one embodiment of the present disclosure, the method further includes: before the first divided capacity discharge and the third divided capacity discharge, the multiple target batteries are allowed to stand for a first period of time, and before the second divided capacity discharge and the fourth divided capacity discharge, the multiple target batteries are allowed to stand for a second period of time.

[0016] According to one embodiment of the present disclosure, the first discharge current is 0.3C-1.0C, and the second discharge current is 0.05C-0.2C.

[0017] To achieve the above-mentioned purpose, a second aspect of the present disclosure proposes a battery capacity determination device, including: an acquisition module, used to acquire multiple target batteries, and charge the multiple target batteries respectively according to a target charging method; a first discharge module, used to perform a first capacity-divided discharge on the multiple target batteries after charging according to a first discharge current to obtain a first quantity of electricity after the first capacity-divided discharge, and then perform a second capacity-divided discharge on the multiple target batteries after the first capacity-divided discharge according to a second discharge current to obtain a second quantity of electricity after the second capacity-divided discharge, wherein the first discharge current is greater than the second discharge current; a second discharge module, used to charge the multiple target batteries after the second capacity-divided discharge according to a target charging method, and perform a third capacity-divided discharge on the multiple target batteries after charging according to the first discharge current, and then perform a fourth capacity-divided discharge on the multiple target batteries after the third capacity-divided discharge according to the second discharge current to obtain a third quantity of electricity after the fourth capacity-divided discharge, wherein the discharge time of the first capacity-divided discharge is the same as the discharge time of the third capacity-divided discharge, and the discharge time of the second capacity-divided discharge is the same as the discharge time of the fourth capacity-divided discharge; a determination module, used to determine the target quantity of each of the multiple target batteries based on the first quantity of electricity, the second quantity of electricity, and the third quantity of electricity.

[0018] To achieve the above-mentioned purpose, the third aspect embodiment of the present disclosure proposes an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to implement the battery capacity determination method as described in the first aspect embodiment of the present disclosure.

[0019] To achieve the above-mentioned purpose, the fourth aspect embodiment of the present disclosure proposes a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to implement the battery capacity determination method as described in the first aspect embodiment of the present disclosure.

[0020] To achieve the above-mentioned purpose, a fifth aspect of the present disclosure proposes a computer program product, including a computer program, which, when executed by a processor, is used to implement the battery capacity determination method as described in the first aspect of the present disclosure.

[0021] It can be seen that the present invention adds a low-rate discharge step after the original capacity division discharge step is completed, and performs two low-rate discharges at the same time, and uses the second low-rate discharge as a comparison value, so as to adjust the power measured by the first discharge, which can reduce the instrument reasons during battery capacity division or the large discharge current that generates a lot of heat, resulting in a high temperature rise of the battery, so that the capacity of the battery division is inconsistent with the actual capacity. The accuracy of the target power finally measured can be improved, so that in the battery manufacturing process, appropriate raw material input can be selected to control the material cost of battery manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a method for determining battery capacity according to an embodiment of the present disclosure;

[0023] Figure 2 is a schematic diagram of another method for determining battery capacity according to an embodiment of the present disclosure;

[0024] Figure 3 is a schematic diagram of a battery capacity determination device according to an embodiment of the present disclosure;

[0025] Figure 4 is a schematic diagram of an electronic device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] Embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0027] The acquisition, storage, use, and processing of data in the technical solution disclosed in this disclosure are in compliance with the relevant provisions of relevant laws and regulations.

[0028] It should be noted that in the embodiments of the present application, certain software, components, models and other existing solutions in the industry may be mentioned, and they should be considered as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of the present application, but it does not mean that the applicant has or will necessarily use the solution.

[0029] Figure 1 is a schematic diagram of a method for determining battery capacity according to an embodiment of the present disclosure, such as Figure 1As shown, the battery capacity determination method includes the following steps:

[0030] S101, obtaining a plurality of target batteries, and charging the plurality of target batteries respectively according to a target charging method.

[0031] The battery capacity determination method of the embodiment of the present application can be applied to the scenario of capacity detection of lithium batteries. The executor of the battery capacity determination of the embodiment of the present application can be the battery capacity determination device of the embodiment of the present application, and the battery capacity determination device can be set on an electronic device.

[0032] It should be noted that the target charging method is designed in advance and can be changed according to actual design needs, and no limitation is made here.

[0033] For example, the target charging method may be charging until fully charged, or charging for a set time according to a set current.

[0034] It should be noted that the target battery in the embodiment of the present disclosure may be a lithium battery to be tested. In order to ensure the accuracy of the final test, the more target batteries there are, the higher the accuracy of the capacity obtained by the final test.

[0035] In the embodiment of the present disclosure, the number of the plurality of target batteries may be 100-1000.

[0036] S102, performing a first divided capacity discharge on the multiple target batteries after being charged according to a first discharge current to obtain a first quantity of electricity after the first divided capacity discharge, and then performing a second divided capacity discharge on the multiple target batteries after the first divided capacity discharge according to a second discharge current to obtain a second quantity of electricity after the second divided capacity discharge, wherein the first discharge current is greater than the second discharge current.

[0037] It should be noted that the first discharge current and the second discharge current are designed in advance and can be changed according to actual test needs, and are not limited here.

[0038] In the embodiment of the present disclosure, the first power and the second power can be collected through a capacity dividing cabinet. A capacity dividing cabinet generally refers to a device used for battery testing in the fields of electronic manufacturing, battery production and research. It is mainly used to accurately measure and analyze the capacity of the battery.

[0039] S103, charging the multiple target batteries after the second divided capacity discharge according to the target charging method, and performing a third divided capacity discharge on the multiple target batteries after the charge according to the first discharge current, and then performing a fourth divided capacity discharge on the multiple target batteries after the third divided capacity discharge according to the second discharge current to obtain a third electric quantity after the fourth divided capacity discharge, wherein the discharge time of the first divided capacity discharge is the same as the discharge time of the third divided capacity discharge, and the discharge time of the second divided capacity discharge is the same as the discharge time of the fourth divided capacity discharge.

[0040] S104, determining a target power level of each of a plurality of target batteries based on the first power level, the second power level, and the third power level.

[0041] It should be noted that in the embodiments of the present disclosure, a group of target batteries can be tested multiple times.

[0042] In actual operation, due to the large discharge current during battery capacity division, the heat generated is large, the temperature rise is high, and the temperature discreteness is relatively large, resulting in the capacity of the battery capacity division not being consistent with the actual capacity. In another possible way, there may also be detection errors in the detection instrument due to the external environment. Therefore, in the present disclosure, the actual measurement error is determined by two low-rate discharges, and the final measurement result is adjusted to improve its accuracy.

[0043] In an embodiment of the present disclosure, a plurality of target batteries are first obtained, and the plurality of target batteries are charged according to a target charging method, respectively. Then, the plurality of charged target batteries are subjected to a first fractional capacity discharge according to a first discharge current to obtain a first quantity of electricity after the first fractional capacity discharge. Then, the plurality of target batteries after the first fractional capacity discharge are subjected to a second fractional capacity discharge according to a second discharge current to obtain a second quantity of electricity after the second fractional capacity discharge, wherein the first discharge current is greater than the second discharge current. Then, the plurality of target batteries after the second fractional capacity discharge are charged according to a target charging method, and the plurality of charged target batteries are subjected to a third fractional capacity discharge according to the first discharge current. Then, the plurality of target batteries after the third fractional capacity discharge are subjected to a fourth fractional capacity discharge according to the second discharge current to obtain a third quantity of electricity after the fourth fractional capacity discharge, wherein the discharge time of the first fractional capacity discharge is the same as the discharge time of the third fractional capacity discharge, and the discharge time of the second fractional capacity discharge is the same as the discharge time of the fourth fractional capacity discharge. Finally, the target quantities of the plurality of target batteries are determined based on the first quantity of electricity, the second quantity of electricity, and the third quantity of electricity. It can be seen that the present invention adds a low-rate discharge step after the original capacity division discharge step is completed, and performs two low-rate discharges at the same time, and uses the second low-rate discharge as a comparison value, so as to adjust the power measured by the first discharge, which can reduce the instrument reasons during battery capacity division or the large discharge current that generates a lot of heat, resulting in a high temperature rise of the battery, so that the capacity of the battery division is inconsistent with the actual capacity. The accuracy of the target power finally measured can be improved, so that in the battery manufacturing process, appropriate raw material input can be selected to control the material cost of battery manufacturing.

[0044] It should be noted that the target charging method is to charge at a constant current for a set time according to a set charging current.

[0045] The first and third capacity-divided discharges are performed according to the first discharge current to discharge to the first set voltage, and the second and fourth capacity-divided discharges are performed according to the second discharge current to discharge to the second set voltage.

[0046] Before the first and third capacity-divided discharges, the plurality of target batteries are left to stand for a first period of time; before the second and fourth capacity-divided discharges, the plurality of target batteries are left to stand for a second period of time.

[0047] The first discharge current is 0.3C-1.0C, and the second discharge current is 0.05C-0.2C.

[0048] In the above embodiment, the target power of each of the plurality of target batteries is determined based on the first power, the second power and the third power, and the target power of each of the plurality of target batteries can also be determined by Figure 2 Explaining further, the method includes:

[0049] S201, calculating an average of third electrical quantities of a plurality of target batteries to obtain an average third electrical quantity.

[0050] S202 : For any target battery among the multiple target batteries, calculate a target power based on an average third power and a first power and a second power of the target battery.

[0051] In the embodiment of the present disclosure, the first power level and the second power level may be added to calculate the fourth power level, and then the fourth power level and the average third power level may be subtracted to calculate the target power level of the target battery.

[0052] In the embodiment of the present disclosure, the target power can be calculated based on the following formula:

[0053] C 目标 =C f -X

[0054] Among them, C 目标 is the target power, X is the average third power, C f It is the fourth electrical quantity.

[0055] In the disclosed embodiment, the average value of the third electric quantity of multiple target batteries is first calculated to obtain the average third electric quantity, and then the target electric quantity is calculated for any target battery among the multiple target batteries based on the average third electric quantity and the first electric quantity and the second electric quantity of the target battery. Thus, the second electric quantity is compensated by the average third electric quantity of multiple target batteries, which can reduce the influence of the battery temperature rising due to the instrument or the large heat generated by the large discharge current during the battery capacity division, so that the capacity of the battery division does not match the actual capacity.

[0056] In a possible implementation, the battery capacity determination method may be as shown in the process of the following embodiment:

[0057] Step 1: Select 22 110Ah lithium iron phosphate batteries and charge them at constant current and constant voltage according to the normal process. The charging current is 1C, the charging voltage is 3.65V, and the charging time is 2 hours.

[0058] Step 2: Let the fully charged battery stand for 30 minutes, then discharge it to 2.5V at a constant discharge current of 1C, and record the discharge capacity at this time as C1.

[0059] Step 3: Let the battery rest for 30 minutes again, then discharge it at a constant discharge current of 0.1C to a cut-off voltage of 2.0V, and record the discharge capacity at this time as C2.

[0060] Step 4: Charge the battery again with constant current and constant voltage according to the normal process. The charging current is 1C, the charging voltage is 3.65V, and the charging time is 2 hours.

[0061] Step 5: Let the fully charged battery stand for 30 minutes again, then discharge it to 2.5V at a constant discharge current of 1C, and record the discharge capacity at this time as C3.

[0062] Step 6: Let the battery stand for 30 minutes again, then discharge it at a constant discharge current of 0.1C to a cut-off voltage of 2.0V, and record the discharge capacity at this time as C4.

[0063] Step 7: In the capacity distribution cabinet, collect the values ​​of C1 and C2, and mark their cumulative value as C5, where C5 is the cumulative capacity of the first discharge.

[0064] Step 8: In the capacity distribution cabinet, collect the values ​​of C3 and C4, and mark their cumulative value as C6, where C6 is the accumulated capacity of the heavy capacity distribution discharge.

[0065] Step 9: Collect 100-1000 groups of C4 data and calculate the average value X of this group of data. X is the average value of the re-capacity of 0.1C.

[0066] Step 10: Calculate the target power of the battery, namely C5-X. The above are the specific operation steps of this embodiment. Through this method, the efficiency and accuracy of the lithium iron phosphate battery capacity test can be effectively improved, and the difficulty and cost of the test can also be reduced.

[0067] The specific measurement results can be shown in the following table:

[0068]

[0069]

[0070] Furthermore, when the difference between the climbing capacity and the re-distribution capacity is large, the measuring instrument or the corresponding battery may be tested to determine whether there is a fault in the measuring instrument or the corresponding battery.

[0071] Corresponding to the battery capacity determination methods provided in the above-mentioned embodiments, an embodiment of the present disclosure further provides a battery capacity determination device. Since the battery capacity determination device provided in the embodiment of the present disclosure corresponds to the battery capacity determination methods provided in the above-mentioned embodiments, the implementation methods of the above-mentioned battery capacity determination methods are also applicable to the battery capacity determination device provided in the embodiment of the present disclosure, and will not be described in detail in the following embodiments.

[0072] Figure 3 is a schematic diagram of a battery capacity determination device according to an embodiment of the present disclosure. Figure 3 As shown, the battery capacity determination device 300 includes: an acquisition module 310, a first discharge module 320, a second discharge module 330 and a determination module 340.

[0073] The acquisition module 310 is used to acquire multiple target batteries and charge the multiple target batteries respectively according to the target charging method.

[0074] The first discharging module 320 is used to perform a first capacity-divided discharge on the multiple charged target batteries according to a first discharging current to obtain a first quantity of electricity after the first capacity-divided discharge, and then perform a second capacity-divided discharge on the multiple target batteries after the first capacity-divided discharge according to a second discharging current to obtain a second quantity of electricity after the second capacity-divided discharge, wherein the first discharging current is greater than the second discharging current;

[0075] The second discharging module 330 is used to charge the multiple target batteries after the second divided capacity discharge according to the target charging method, and perform a third divided capacity discharge on the multiple charged target batteries according to the first discharge current, and then perform a fourth divided capacity discharge on the multiple target batteries after the third divided capacity discharge according to the second discharge current to obtain a third electric quantity after the fourth divided capacity discharge, wherein the discharge time of the first divided capacity discharge is the same as the discharge time of the third divided capacity discharge, and the discharge time of the second divided capacity discharge is the same as the discharge time of the fourth divided capacity discharge.

[0076] The determination module 340 is configured to determine a target power level of each of the plurality of target batteries based on the first power level, the second power level and the third power level.

[0077] In one embodiment of the present disclosure, the determination module 340 is further used to: calculate the average value of the third power of multiple target batteries to obtain the average third power; and calculate the target power for any target battery among the multiple target batteries based on the average third power and the first power and the second power of the target battery.

[0078] In one embodiment of the present disclosure, the determination module 340 is further used to: add the first power and the second power to calculate a fourth power; and subtract the fourth power from the average third power to calculate a target power of the target battery.

[0079] In one embodiment of the present disclosure, the target charging method is to charge at a set constant current for a set time according to a set charging current.

[0080] In one embodiment of the present disclosure, the first and third divided capacity discharges are discharged to a first set voltage according to a first discharge current, and the second and fourth divided capacity discharges are discharged to a second set voltage according to a second discharge current.

[0081] In one embodiment of the present disclosure, before the first and third capacity-divided discharges, the multiple target batteries are left to stand for a first period of time, and before the second and fourth capacity-divided discharges, the multiple target batteries are left to stand for a second period of time.

[0082] In one embodiment of the present disclosure, the first discharge current is 0.3C-1.0C, and the second discharge current is 0.05C-0.2C.

[0083] It can be seen that the present invention adds a low-rate discharge step after the original capacity division discharge step is completed, and performs two low-rate discharges at the same time, and uses the second low-rate discharge as a comparison value, so as to adjust the power measured by the first discharge, which can reduce the instrument reasons during battery capacity division or the large discharge current that generates a lot of heat, resulting in a high temperature rise of the battery, so that the capacity of the battery division is inconsistent with the actual capacity. The accuracy of the target power finally measured can be improved, so that in the battery manufacturing process, appropriate raw material input can be selected to control the material cost of battery manufacturing.

[0084] In order to implement the above embodiment, the present disclosure further provides an electronic device 400, Figure 4 is a schematic diagram of an electronic device according to an embodiment of the present disclosure, such as Figure 4 As shown, the electronic device 400 includes: a processor 401 and a memory 402 connected to the processor in communication, the memory 402 stores instructions that can be executed by at least one processor, and the instructions are executed by at least one processor 401 to implement the present disclosure. Figure 1-Figure 2 A method for determining battery capacity of an embodiment.

[0085] In order to implement the above embodiments, the present disclosure also provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable the computer to implement the above embodiments. Figure 1-Figure 2 A method for determining battery capacity of an embodiment.

[0086] In order to implement the above embodiments, the present disclosure also provides a computer program product, including a computer program. When the computer program is executed by a processor, the computer program implements the above embodiments. Figure 1-Figure 2 A method for determining battery capacity according to an embodiment of the present invention.

[0087] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0088] The present application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, the present disclosure is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, the risk can be minimized by limiting data collection and deleting the data. In addition, when applicable, such personal information is de-identified to protect the privacy of the user.

[0089] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0090] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0091] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0092] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that contains, stores, communicates, propagates or transmits a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0093] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0094] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0095] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0096] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for determining battery capacity, characterized in that: include: Acquire multiple target batteries, and charge the multiple target batteries respectively according to a target charging method; Performing a first capacity-divided discharge on the multiple target batteries after the first capacity-divided discharge according to a first discharge current to obtain a first quantity of electricity after the first capacity-divided discharge, and then performing a second capacity-divided discharge on the multiple target batteries after the first capacity-divided discharge according to a second discharge current to obtain a second quantity of electricity after the second capacity-divided discharge, wherein the first discharge current is greater than the second discharge current; charging the multiple target batteries after the second divided capacity discharge according to the target charging method, performing a third divided capacity discharge on the multiple target batteries after the charge according to the first discharge current, and then performing a fourth divided capacity discharge on the multiple target batteries after the third divided capacity discharge according to the second discharge current, so as to obtain a third amount of electricity after the fourth divided capacity discharge, wherein the discharge time of the first divided capacity discharge is the same as the discharge time of the third divided capacity discharge, and the discharge time of the second divided capacity discharge is the same as the discharge time of the fourth divided capacity discharge; A target power level of each of the plurality of target batteries is determined based on the first power level, the second power level, and the third power level.

2. The method according to claim 1, characterized in that: The determining the target power of each of the plurality of target batteries based on the first power, the second power, and the third power includes: Calculating an average of the third electrical quantities of the plurality of target batteries to obtain an average third electrical quantity; For any target battery among the plurality of target batteries, the target power is calculated based on the average third power and the first power and the second power of the target battery.

3. The method according to claim 2, characterized in that The calculating the target power based on the average third power and the first power and the second power of the target battery includes: Adding the first electrical quantity and the second electrical quantity to calculate a fourth electrical quantity; The fourth power level is subtracted from the average third power level to calculate and obtain the target power level of the target battery.

4. The method according to claim 1, characterized in that: The target charging method is to charge at a constant current for a set time according to a set charging current.

5. The method according to claim 1, characterized in that The first split capacity discharge and the third split capacity discharge are performed by discharging to a first set voltage according to the first discharge current, and the second split capacity discharge and the fourth split capacity discharge are performed by discharging to a second set voltage according to the second discharge current.

6. The method according to claim 1, characterized in that The method further comprises: Before the first and third capacity-divided discharges, the plurality of target batteries are allowed to stand for a first period of time; and before the second and fourth capacity-divided discharges, the plurality of target batteries are allowed to stand for a second period of time.

7. The method according to claim 1, characterized in that The first discharge current is 0.3C-1.0C, and the second discharge current is 0.05C-0.2C.

8. A battery capacity determination device, characterized in that: include: An acquisition module, used for acquiring a plurality of target batteries, and charging the plurality of target batteries respectively according to a target charging method; a first discharging module, configured to perform a first capacity-divided discharge on the plurality of target batteries after being charged according to a first discharging current to obtain a first quantity of electricity after the first capacity-divided discharge, and then perform a second capacity-divided discharge on the plurality of target batteries after the first capacity-divided discharge according to a second discharging current to obtain a second quantity of electricity after the second capacity-divided discharge, wherein the first discharging current is greater than the second discharging current; a second discharging module, used for charging the plurality of target batteries after the second divided capacity discharge according to a target charging method, and performing a third divided capacity discharge on the plurality of target batteries after the charge according to the first discharge current, and then performing a fourth divided capacity discharge on the plurality of target batteries after the third divided capacity discharge according to the second discharge current, so as to obtain a third electric quantity after the fourth divided capacity discharge, wherein the discharge time of the first divided capacity discharge is the same as the discharge time of the third divided capacity discharge, and the discharge time of the second divided capacity discharge is the same as the discharge time of the fourth divided capacity discharge; A determination module is used to determine a target power of each of the multiple target batteries based on the first power, the second power and the third power.

9. An electronic device, characterized in that: Including memory and processor; The processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 7 when executed by a processor.

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