Battery system charging control method and device, electronic equipment and storage medium

Abstract

This application provides a charging control method, apparatus, electronic device, and storage medium for a battery system. During the charging process of the battery system, the voltages of multiple individual cells in the battery system are acquired in real time. When the target voltage is greater than or equal to a preset minimum charging cutoff voltage, the parameter values ​​of the battery system are acquired. Based on the parameter values, the preset maximum and minimum charging cutoff voltages, the target charging cutoff voltage is determined, and the battery system is controlled to charge according to the target charging cutoff voltage. In this method, when the target voltage is greater than or equal to the preset minimum charging cutoff voltage, the parameter values ​​of the battery system are acquired in real time. At this time, using these parameter values, combined with the preset maximum and minimum charging cutoff voltages, the target charging cutoff voltage is dynamically determined. This can reduce the differences between cells in the battery system, improve the consistency between cells, and thus maximize the system capacity.

Description

Technical Field

[0001] This application relates to the field of battery systems, and more particularly to a charging control method, apparatus, electronic device, and storage medium for a battery system. Background Technology

[0002] Currently, vehicle battery systems typically consist of many batteries connected in series and parallel. Due to inconsistencies between battery cells or modules, the entire power system cannot fully utilize its capabilities. Therefore, applying effective charging control strategies to the charging process of the power system is of great significance for improving system capacity and increasing the vehicle's range.

[0003] In existing charging control methods, current control is typically used. For example, when the battery system voltage reaches the charging cutoff voltage and the current charging current is greater than a preset current threshold, the current charging current is reduced according to current adjustment parameters to obtain a target current, and the battery system is charged according to the target current. In this method, when the battery is not fully charged during the charging process, power limiting and charging current are controlled multiple times to repeatedly charge to the charging cutoff voltage in order to achieve a state of being as fully charged as possible.

[0004] However, existing charging control methods cannot reduce the differences in voltage between individual battery cells, nor do they consider the issue of balancing different charging cut-off voltages between cells, thus failing to maximize the capacity of the battery system. Summary of the Invention

[0005] This application provides a charging control method, device, electronic device, and storage medium for a battery system, which solves the problem that existing charging control methods for battery systems cannot reduce the differences in voltage between individual battery cells and cannot maximize the capacity of the power system.

[0006] In a first aspect, this application provides a charging control method for a battery system, comprising:

[0007] Real-time acquisition of the voltage of multiple cells in the battery system.

[0008] When the target voltage is greater than or equal to the preset minimum charging cutoff voltage, the parameter values ​​of the battery system are obtained. The target voltage includes the maximum single-cell voltage, the minimum single-cell voltage, or the average voltage of multiple single-cell voltages.

[0009] The target charging cutoff voltage is determined based on the parameter values, the preset maximum charging cutoff voltage, and the preset minimum charging cutoff voltage.

[0010] The battery system is charged according to the target charging cutoff voltage.

[0011] Optionally, the target charging cutoff voltage is determined based on parameter values, the preset maximum charging cutoff voltage, and the preset minimum charging cutoff voltage, including:

[0012] The target charging cutoff voltage is determined based on the parameter values, the corresponding preset thresholds, the maximum charging cutoff voltage, and the minimum charging cutoff voltage.

[0013] Optional parameters include system differential pressure.

[0014] The target charging cutoff voltage is determined based on the parameter values, the corresponding preset thresholds, the maximum charging cutoff voltage, and the minimum charging cutoff voltage, including:

[0015] The target charging cutoff voltage is determined according to formula (1):

[0016] v cut =V min +(V max -V min )*Δv / ΔV th (1)

[0017] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min ΔV represents the minimum charging cutoff voltage, Δv represents the system voltage difference, and ΔV th This indicates the preset threshold corresponding to the system pressure difference.

[0018] Optional parameters include system differential pressure.

[0019] The target charging cutoff voltage is determined based on the parameter values, the corresponding preset thresholds, the maximum charging cutoff voltage, and the minimum charging cutoff voltage, including:

[0020] The target charging cutoff voltage is determined according to formula (2):

[0021]

[0022] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min ΔV represents the minimum charging cutoff voltage, Δv represents the system voltage difference, and ΔV th This indicates the preset threshold corresponding to the system pressure difference.

[0023] Optional parameters include the system average voltage.

[0024] The target charging cutoff voltage is determined based on the parameter values, the corresponding preset thresholds, the maximum charging cutoff voltage, and the minimum charging cutoff voltage, including:

[0025] The target charging cutoff voltage is determined according to formula (3):

[0026]

[0027] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min This indicates the minimum charging cutoff voltage. Indicates the system average voltage. This represents the preset threshold corresponding to the system's average voltage.

[0028] Optional parameters include the system average voltage.

[0029] The target charging cutoff voltage is determined based on the parameter values, the corresponding preset thresholds, the maximum charging cutoff voltage, and the minimum charging cutoff voltage, including:

[0030] The target charging cutoff voltage is determined according to formula (4):

[0031]

[0032] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min This indicates the minimum charging cutoff voltage. Indicates the system average voltage. This represents the preset threshold corresponding to the system's average voltage.

[0033] Secondly, this application provides a charging control device for a battery system, comprising:

[0034] The acquisition module is used to acquire the voltage of multiple cells in the battery system in real time.

[0035] This acquisition module is also used to acquire parameter values ​​of the battery system when the target voltage is greater than or equal to a preset minimum charging cutoff voltage. The target voltage includes the maximum single-cell voltage, the minimum single-cell voltage, or the average voltage of multiple single-cell voltages among multiple single-cell voltages.

[0036] The determination module is used to determine the target charging cutoff voltage based on parameter values, the preset maximum charging cutoff voltage, and the preset minimum charging cutoff voltage.

[0037] The control module is used to control the battery system to charge according to the target charging cutoff voltage.

[0038] Optionally, this determining module is specifically used for:

[0039] The target charging cutoff voltage is determined based on the parameter values, the corresponding preset thresholds, the maximum charging cutoff voltage, and the minimum charging cutoff voltage.

[0040] Optional parameters include system differential pressure.

[0041] This determining module is specifically used for:

[0042] The target charging cutoff voltage is determined according to formula (1):

[0043] v cut =V min +(V max -V min )*Δv / ΔV th (1)

[0044] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min ΔV represents the minimum charging cutoff voltage, Δv represents the system voltage difference, and ΔV th This indicates the preset threshold corresponding to the system pressure difference.

[0045] Optional parameters include system differential pressure.

[0046] This determining module is specifically used for:

[0047] The target charging cutoff voltage is determined according to formula (2):

[0048]

[0049] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min ΔV represents the minimum charging cutoff voltage, Δv represents the system voltage difference, and ΔV th This indicates the preset threshold corresponding to the system pressure difference.

[0050] Optional parameters include the system average voltage.

[0051] This determining module is specifically used for:

[0052] The target charging cutoff voltage is determined according to formula (3):

[0053]

[0054] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min This indicates the minimum charging cutoff voltage. Indicates the system average voltage. This represents the preset threshold corresponding to the system's average voltage.

[0055] Optional parameters include the system average voltage.

[0056] This determining module is specifically used for:

[0057] The target charging cutoff voltage is determined according to formula (4):

[0058]

[0059] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min This indicates the minimum charging cutoff voltage. Indicates the system average voltage. This represents the preset threshold corresponding to the system's average voltage.

[0060] Thirdly, this application provides an electronic device, including: a memory and a processor;

[0061] Memory is used to store computer programs.

[0062] The processor is used to read the computer program stored in the memory and execute the charging control method of the battery system described in the first aspect according to the computer program in the memory.

[0063] Fourthly, this application provides a readable storage medium having a computer program stored thereon, the computer program storing computer execution instructions, which, when executed by a processor, are used to implement the charging control method of the battery system as described in the first aspect above.

[0064] Fifthly, embodiments of this application also provide a computer program product, including a computer program that, when executed by a processor, implements the charging control method for the battery system described in the first aspect.

[0065] The charging control method, apparatus, electronic device, and storage medium for the battery system provided in this application acquire multiple cell voltages in the battery system in real time during the charging process. When the target voltage is greater than or equal to a preset minimum charging cutoff voltage, the parameter values ​​of the battery system are acquired. Based on the parameter values, the preset maximum and minimum charging cutoff voltages, the target charging cutoff voltage is determined, and the battery system is controlled to charge according to the target charging cutoff voltage. In this method, when the target voltage is greater than or equal to the preset minimum charging cutoff voltage, the parameter values ​​of the battery system are acquired in real time. At this time, using these parameter values, combined with the preset maximum and minimum charging cutoff voltages, the target charging cutoff voltage is dynamically determined. This can reduce the differences between cells in the battery system, improve the consistency between cells, and thus maximize the system capacity. Attached Figure Description

[0066] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0067] Figure 1 A schematic flowchart illustrating a charging control method for a battery system provided in an embodiment of this application;

[0068] Figure 2 A diagram showing the relationship between system voltage difference and target charging cutoff voltage is provided for an embodiment of this application.

[0069] Figure 3 Another diagram showing the relationship between system voltage difference and target charging cutoff voltage provided in this application embodiment;

[0070] Figure 4 This is a schematic diagram of the structure of a charging control device for a battery system provided in an embodiment of this application;

[0071] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0072] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0073] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0074] The technical solution provided in this application can be used in the charging process of an electric vehicle battery management system (BMS), especially in scenarios where real-time charging control of the battery system is performed at the end of the charging process. Because the state of charge (SoC) changes rapidly at the beginning and end of the charging process, controlling the charging of the battery system at this time will have a more significant effect.

[0075] Currently, current control is commonly used for charging control in vehicle battery systems. For example, when the current battery voltage reaches the charging cutoff voltage and the current charging current is greater than a preset current threshold, the current charging current is reduced according to current adjustment parameters to obtain the target current, and the battery is charged according to the target current. However, this charging control method targets the entire battery system and does not consider the consistency differences between individual cells or modules within the battery system. Furthermore, this method uses a fixed preset charging cutoff voltage and does not consider the issue of balancing different charging cutoff voltages with the cells. Since a battery system typically consists of many batteries, due to the "weakest link" effect, some batteries may not be fully charged, and a single battery can affect the capacity of the entire battery system.

[0076] To address the above issues, this application proposes a charging control method for a battery system. During charging, the voltages of multiple individual cells in the battery system are acquired in real time. When the target voltage is greater than or equal to a preset minimum charging cutoff voltage, the parameter values ​​of the battery system are acquired. Based on the parameter values, the preset maximum and minimum charging cutoff voltages, the target charging cutoff voltage is determined, and the battery system is controlled to charge according to the target charging cutoff voltage. In this method, when the target voltage is greater than or equal to the preset minimum charging cutoff voltage, the parameter values ​​of the battery system are acquired in real time. At this point, using these parameter values, combined with the preset maximum and minimum charging cutoff voltages, the target charging cutoff voltage is dynamically determined. This reduces the differences between cells in the battery system, improves the consistency between cells, and thus maximizes the system capacity.

[0077] The technical solution of this application and how it solves the above-mentioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0078] Figure 1 This is a schematic flowchart illustrating a charging control method for a battery system provided in an embodiment of this application. This charging control method can be executed by software and / or hardware devices, such as electronic devices like terminals or servers. For example, please refer to [link to example]. Figure 1 As shown, the charging control method of this battery system may include:

[0079] S101: Real-time acquisition of the voltage of multiple individual cells in the battery system.

[0080] In this step, the battery system may include multiple batteries, and the voltage of a single cell can be understood as the voltage of each individual battery cell.

[0081] S102. When the target voltage is greater than or equal to the preset minimum charging cutoff voltage, obtain the parameter values ​​of the battery system. The target voltage may include the maximum single-cell voltage, the minimum single-cell voltage, or the average voltage of multiple single-cell voltages.

[0082] In this step, the target voltage can be any of the voltages in the battery system, such as the maximum single-cell voltage, minimum single-cell voltage, or average single-cell voltage. The parameters can be a combination of one or more variables that reflect the voltage consistency between individual cells in the battery system, such as the system single-cell voltage difference, the system average single-cell voltage, the system single-cell voltage median, and the system single-cell voltage standard deviation. The specific combination is not limited here.

[0083] Specifically, the real-time system voltage difference can be adjusted by changing the preset minimum charging cutoff voltage. Different minimum charging cutoff voltages result in different real-time system voltage differences. For example, when the preset minimum charging cutoff voltage is 3.6V, the real-time system voltage difference is 0.2V when the target voltage is greater than or equal to 3.6V; when the preset minimum charging cutoff voltage is 3.65V, the real-time system voltage difference is 0.15V when the target voltage is greater than or equal to 3.65V.

[0084] S103. Determine the target charging cutoff voltage based on the parameter values, the preset maximum charging cutoff voltage, and the preset minimum charging cutoff voltage.

[0085] In this step, the preset maximum and minimum charging cutoff voltage values ​​can be understood as the upper and lower limits of the charging cutoff voltage range set in the battery system, and the maximum and minimum charging cutoff voltage values ​​can be set according to battery capacity, module capacity, system capacity, and characteristics.

[0086] Specifically, the target charging cutoff voltage can be dynamically obtained by adjusting the preset threshold corresponding to the system differential pressure, the preset maximum value of the charging cutoff voltage, and the preset minimum value of the charging cutoff voltage.

[0087] For example, the target charging cutoff voltage is determined based on the parameter value, the preset threshold corresponding to the parameter, the maximum charging cutoff voltage, and the minimum charging cutoff voltage.

[0088] The preset threshold corresponding to the parameter can be a preset threshold corresponding to one or more variables, namely, a combination of one or more thresholds such as the extreme voltage difference of the system cell voltage, the system limit average cell voltage, the system limit median cell voltage, and the system cell voltage limit standard deviation. This preset threshold can be set according to the characteristics of the battery cell. For example, if the selected parameter is the system voltage difference, then the preset threshold corresponding to the parameter is the system limit voltage difference; if the selected parameter is a combination of the system voltage difference and the system cell voltage standard deviation, then the preset threshold corresponding to the parameter is a combination of the system limit voltage difference and the system cell voltage limit standard deviation.

[0089] Specifically, when the target voltage is greater than or equal to the preset minimum charging cutoff voltage, the parameter values ​​of the battery system are acquired in real time. At this time, the target charging cutoff voltage is dynamically determined by using the parameter value and the preset threshold corresponding to the parameter, combined with the preset maximum and minimum charging cutoff voltage values.

[0090] In this solution, the target charging cutoff voltage is dynamically obtained based on parameter values, corresponding preset thresholds, the maximum and minimum charging cutoff voltages. The parameter values ​​reflect the voltage consistency between individual cells in the battery system. The preset thresholds corresponding to the parameters can be set according to the cell characteristics. The maximum and minimum charging cutoff voltages can be preset based on battery capacity, module capacity, system capacity, and other characteristics to dynamically obtain the target charging cutoff voltage. This reduces the differences between cells in the battery system and creates conditions for equalization while ensuring that the battery is not abused.

[0091] In one possible implementation, the parameters include the system voltage difference, and the target charging cutoff voltage can be determined according to formula (1):

[0092] v cut =V min +(V max -Vmin )*Δv / ΔV th (1)

[0093] In another possible implementation, when the parameters include the system differential pressure, the target charging cutoff voltage can also be determined according to formula (2):

[0094]

[0095] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min ΔV represents the minimum charging cutoff voltage, Δv represents the system voltage difference, and ΔV th This indicates the preset threshold corresponding to the system pressure difference.

[0096] Specifically, when the parameter is a single variable and is the system pressure difference, it can be seen from formulas (1) and (2) that the system pressure difference Δv obtained in real time and the preset threshold ΔV corresponding to the system pressure difference can be used. th The preset maximum charging cutoff voltage V max and the preset minimum charging cutoff voltage V min To obtain the target charging cutoff voltage v cut .

[0097] For example, in the battery system of a certain new energy vehicle, the preset maximum charging cutoff voltage V max =3.65V, preset minimum charging cutoff voltage V min = 3.6V, the threshold ΔV corresponding to the system voltage difference. th =0.5V, when charged to the highest single-cell voltage ≥3.65V, the real-time voltage difference Δv = 0.2V is calculated according to formula (1) or formula (2):

[0098] v cut =3.6 + (3.65 - 3.6) * 0.2 / 0.5 = 3.62

[0099] or v cut =3.6 + (3.65 - 3.6) * log( 0.5+1) (0.2+1)=3.6225

[0100] in, Figure 2 When the preset maximum charging cutoff voltage V max =3.65V, preset minimum charging cutoff voltage V min =3.6V, the threshold value ΔV corresponding to the system voltage difference th When the voltage is 0.5V, the system voltage difference Δv is related to the target charging cutoff voltage v. cut Relationship diagram.

[0101] When the preset threshold ΔV corresponding to the system pressure difference th The preset maximum charging cutoff voltage V max and the preset minimum charging cutoff voltage V min When this changes, the system voltage difference Δv is related to the target charging cutoff voltage v. cut It will also change accordingly. Figure 3 When the preset maximum charging cutoff voltage V max =3.8V, preset minimum charging cutoff voltage V min =3.65V, the threshold value ΔV corresponding to the system voltage difference th The graph shows the relationship between the system voltage difference and the target charging cutoff voltage when the voltage is 0.5V.

[0102] Depend on Figure 2 and Figure 3 It can be seen that when the preset threshold ΔV corresponding to the system pressure difference... th The preset maximum charging cutoff voltage V max and the preset minimum charging cutoff voltage V min Given the same conditions, different system voltage differences correspond to different target charging cutoff voltages.

[0103] In this scheme, the target charging cutoff voltage is based on the real-time acquired system voltage difference Δv and the preset threshold ΔV corresponding to the system voltage difference. th、 Preset maximum charging cutoff voltage V max and the preset minimum charging cutoff voltage V min Since it is dynamically obtained, the target charging cutoff voltage at the charging end can be dynamically adjusted based on one or more variables. The target charging cutoff voltage obtained by this method can reduce the differences between cells in the battery system, thereby maximizing the system capacity.

[0104] In another possible implementation, if the parameters include the system average voltage, the target charging cutoff voltage can be determined according to formula (3):

[0105]

[0106] In another possible implementation, if the parameters include the system average voltage, the target charging cutoff voltage can also be determined according to formula (4):

[0107]

[0108] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min This indicates the minimum charging cutoff voltage. Indicates the system average voltage. This represents the preset threshold corresponding to the system's average voltage.

[0109] Specifically, when the parameter is a variable and is the system average voltage, it can be seen from formulas (3) and (4) that the system average voltage can be obtained in real time. Preset threshold corresponding to the system average voltage Preset maximum charging cutoff voltage V max and the preset minimum charging cutoff voltage V min To obtain the target charging cutoff voltage v cut .

[0110] In this scheme, the target charging cutoff voltage is based on the real-time acquired system average voltage. Preset threshold corresponding to the system average voltage Preset maximum charging cutoff voltage V max and the preset minimum charging cutoff voltage V min The target charging cutoff voltage obtained by this method can reduce the differences between cells in the battery system, thereby maximizing the system capacity.

[0111] S104. Control the battery system to charge according to the target charging cutoff voltage.

[0112] In this step, because the SoC (System-on-Chips) of the battery cell changes rapidly at the beginning and end of charging, charging control of the battery system will be more effective. Therefore, charging control of the battery system at the end of charging can be achieved based on the target charging cutoff voltage.

[0113] The battery system charging control method provided in this application acquires the voltages of multiple individual cells in the battery system in real time. When the target voltage is greater than or equal to a preset minimum charging cutoff voltage, the method acquires the parameter values ​​of the battery system. Based on the parameter values, the preset maximum and minimum charging cutoff voltages, the method determines the target charging cutoff voltage and controls the battery system to charge according to the target charging cutoff voltage. In this method, when the target voltage is greater than or equal to the preset minimum charging cutoff voltage, the method acquires the parameter values ​​of the battery system in real time. At this time, the method uses these parameter values, combined with the preset maximum and minimum charging cutoff voltages, to dynamically determine the target charging cutoff voltage. This can reduce the differences between cells in the battery system, improve the consistency between cells, and thus maximize the system capacity.

[0114] Figure 4 This is a schematic diagram of the structure of a charging control device 40 for a battery system provided in an embodiment of this application. For an example, please refer to [link to example]. Figure 4As shown, the charging control device 40 of the battery system includes:

[0115] The acquisition module 401 is used to acquire the voltage of multiple cells in the battery system in real time.

[0116] The acquisition module 401 is also used to acquire parameter values ​​of the battery system when the target voltage is greater than or equal to a preset minimum charging cutoff voltage. The target voltage includes the maximum single-cell voltage, the minimum single-cell voltage, or the average voltage of multiple single-cell voltages among multiple single-cell voltages.

[0117] The determination module 402 is used to determine the target charging cutoff voltage based on the parameter values, the preset maximum charging cutoff voltage, and the minimum charging cutoff voltage.

[0118] The control module 403 is used to control the battery system to charge according to the target charging cutoff voltage.

[0119] Optionally, the determining module 402 is specifically used for:

[0120] The target charging cutoff voltage is determined based on the parameter values, the corresponding preset thresholds, the maximum charging cutoff voltage, and the minimum charging cutoff voltage.

[0121] Optional parameters include system differential pressure.

[0122] The determining module 402 is specifically used for:

[0123] The target charging cutoff voltage is determined according to formula (1):

[0124] v cut =V min +(V max -V min )*Δv / ΔV th (1)

[0125] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min ΔV represents the minimum charging cutoff voltage, Δv represents the system voltage difference, and ΔV th This indicates the preset threshold corresponding to the system pressure difference.

[0126] Optional parameters include system differential pressure.

[0127] The determining module 402 is specifically used for:

[0128] The target charging cutoff voltage is determined according to formula (2):

[0129]

[0130] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min ΔV represents the minimum charging cutoff voltage, Δv represents the system voltage difference, and ΔV th This indicates the preset threshold corresponding to the system pressure difference.

[0131] Optional parameters include the system average voltage.

[0132] The determining module 402 is specifically used for:

[0133] The target charging cutoff voltage is determined according to formula (3):

[0134]

[0135] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min This indicates the minimum charging cutoff voltage. Indicates the system average voltage. This represents the preset threshold corresponding to the system's average voltage.

[0136] Optional parameters include the system average voltage.

[0137] The determining module 402 is specifically used for:

[0138] The target charging cutoff voltage is determined according to formula (4):

[0139]

[0140] Among them, v cut Indicates the target charging cutoff voltage, V max This indicates the maximum charging cutoff voltage, V. min This indicates the minimum charging cutoff voltage. Indicates the system average voltage. This represents the preset threshold corresponding to the system's average voltage.

[0141] The charging control device 40 of the battery system shown in the embodiments of this application can execute the technical solution of the charging control method of the battery system in the above embodiments. Its implementation principle and beneficial effects are similar to those of the charging control method of the battery system. Please refer to the implementation principle and beneficial effects of the charging control method of the battery system. It will not be repeated here.

[0142] Figure 5 This is a schematic diagram of the structure of an electronic device 50 provided in an embodiment of this application. For example, please refer to [link / reference]. Figure 5As shown, the electronic device 50 may include a processor 501 and a memory 502; wherein,

[0143] Memory 502 is used to store computer programs.

[0144] The processor 501 is used to read the computer program stored in the memory 502 and execute the charging control method of the battery system in the above embodiment according to the computer program in the memory 502.

[0145] Optionally, the memory 502 can be either standalone or integrated with the processor 501. When the memory 502 is a device independent of the processor 501, the electronic device 50 may further include a bus for connecting the memory 502 and the processor 501.

[0146] Optionally, this embodiment further includes a communication interface, which can be connected to the processor 501 via a bus. The processor 501 can control the communication interface to realize the acquisition and transmission functions of the aforementioned electronic device 50.

[0147] For example, in this embodiment of the application, the electronic device 50 can be a terminal or a server, which can be set according to actual needs.

[0148] The electronic device 50 shown in this application embodiment can execute the technical solution of the battery system charging control method in the above embodiment. Its implementation principle and beneficial effects are similar to those of the battery system charging control method. Please refer to the implementation principle and beneficial effects of the battery system charging control method. It will not be repeated here.

[0149] This application also provides a computer-readable storage medium storing computer-executable instructions. When a processor executes the computer-executable instructions, it implements the technical solution of the charging control method of the battery system in the above embodiments. Its implementation principle and beneficial effects are similar to those of the charging control method of the battery system. Please refer to the implementation principle and beneficial effects of the charging control method of the battery system, which will not be repeated here.

[0150] This application also provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements the technical solution of the charging control method of the battery system in the above embodiments. Its implementation principle and beneficial effects are similar to those of the charging control method of the battery system. Please refer to the implementation principle and beneficial effects of the charging control method of the battery system, which will not be repeated here.

[0151] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0152] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or in a combination of hardware and software functional units.

[0153] The integrated modules described above, implemented as software functional modules, can be stored in a computer-readable storage medium. These software functional modules, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods of the various embodiments of this application.

[0154] It should be understood that the aforementioned processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly manifested as being executed by a hardware processor, or executed by a combination of hardware and software modules within the processor.

[0155] The memory may include high-speed random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device, and may also be a USB flash drive, external hard drive, read-only memory, disk or optical disc, etc.

[0156] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0157] The aforementioned computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random-Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The storage medium can be any available medium accessible to general-purpose or special-purpose computers.

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A charge control method of a battery system, characterized by, include: Real-time acquisition of the voltage of multiple cells in the battery system; When the target voltage is greater than or equal to the preset minimum charging cutoff voltage, the parameter values ​​of the battery system are obtained; The target voltage is any one of the maximum single-cell voltage, minimum single-cell voltage, or average voltage of the plurality of single-cell voltages; The target charging cutoff voltage is determined based on the parameter values, the preset thresholds corresponding to the parameters, the maximum charging cutoff voltage, and the minimum charging cutoff voltage. The battery system is charged according to the target charging cutoff voltage; The parameters include system differential pressure and system average voltage; Determining the target charging cutoff voltage based on the parameter value, the preset threshold corresponding to the parameter, the maximum value of the charging cutoff voltage, and the minimum value of the charging cutoff voltage includes: The target charging cutoff voltage is determined according to formula (1): （1） Alternatively, the target charging cutoff voltage can be determined according to formula (2): （2） Alternatively, the target charging cutoff voltage can be determined according to formula (3): （3） Alternatively, the target charging cutoff voltage can be determined according to formula (4): （4） Among them, the Indicates the target charging cutoff voltage, the This indicates the maximum value of the charging cutoff voltage. This represents the minimum value of the charging cutoff voltage. This represents the system pressure difference, the This represents the preset threshold corresponding to the system pressure difference. The average voltage of the system is represented by the following: This represents the preset threshold corresponding to the system's average voltage.

2. A charge control device of a battery system, characterized by, The charging control device for performing the method as described in claim 1, comprising: The acquisition module is used to acquire the voltage of multiple individual cells in the battery system in real time; The acquisition module is further configured to acquire parameter values ​​of the battery system when the target voltage is greater than or equal to a preset minimum charging cutoff voltage; the target voltage is any one of the maximum single-cell voltage, minimum single-cell voltage, or average voltage of the plurality of single-cell voltages; The determination module is used to determine the target charging cutoff voltage based on the parameter value, the preset threshold corresponding to the parameter, the maximum value of the charging cutoff voltage, and the minimum value of the charging cutoff voltage. The control module is used to control the battery system to charge according to the target charging cutoff voltage; The parameters include system differential pressure and system average voltage, and the determining module is specifically used for: The target charging cutoff voltage is determined according to formula (1): （1） Alternatively, the target charging cutoff voltage can be determined according to formula (2): （2） Alternatively, the target charging cutoff voltage can be determined according to formula (3): （3） Alternatively, the target charging cutoff voltage can be determined according to formula (4): （4） Among them, the Indicates the target charging cutoff voltage, the This indicates the maximum value of the charging cutoff voltage. This represents the minimum value of the charging cutoff voltage. This represents the system pressure difference, the This represents the preset threshold corresponding to the system pressure difference. The average voltage of the system is represented by the following: This represents the preset threshold corresponding to the system's average voltage.

3. An electronic device, comprising: include: Memory and processor; The memory is used to store computer programs; The processor is configured to read the computer program stored in the memory and execute the charging control method of the battery system according to claim 1 based on the computer program in the memory.

4. A readable storage medium, having stored thereon a computer program, characterized in that, The computer program stores computer execution instructions, which, when executed by a processor, are used to implement the charging control method of the battery system as described in claim 1.

5. A computer program product comprising a computer program, which, when executed by a processor, implements the charging control method for the battery system according to claim 1.

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