Method, device, electronic device and storage medium for determining battery health status

Abstract

The embodiment of the present invention discloses a method, device, electronic device and storage medium for determining the health status of a battery. The method for determining the health status of a battery includes: obtaining the charge and discharge current, ambient temperature and charge state after the charge and discharge cycle of each charge and discharge cycle of the battery; determining the attenuation factor of each charge and discharge cycle according to the charge and discharge current, ambient temperature and charge state after the charge and discharge cycle of each charge and discharge cycle; determining the health status of the battery according to the attenuation factor of each charge and discharge cycle, the current charge and discharge cycle number of the battery and the total charge and discharge cycle number of the battery. When calculating the health status of the battery, the charge and discharge current, ambient temperature, charge state after the charge and discharge cycle, current charge and discharge cycle number and total charge and discharge cycle number of the battery are comprehensively considered, so that the determined health status of the battery is more accurate and more in line with the actual health status of the battery.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a method, device, electronic device and storage medium for determining a battery health state. Background Art

[0002] Faced with severe problems such as resource shortage and environmental pollution, new energy technology has gradually become the focus of the industry. As the core component of pure electric vehicles, batteries still have many technical problems to be solved, such as the accurate estimation of battery health status (SOH).

[0003] There are several methods for calculating the health status SOH of lithium batteries: one is calculated by useful capacity attenuation, which is calculated by the ratio of the current available capacity to the nominal capacity; the other is calculated by useful internal resistance increase, which establishes the relationship between internal resistance and SOH to estimate SOH; the other is calculated by the total charge and discharge count after the battery leaves the factory, which estimates SOH by calculating the equivalent number of cycles.

[0004] However, the capacity attenuation calculation method is very difficult to measure the capacity of the battery cell in a vehicle application environment. The theoretical calculation method is used, which does not reflect the real-time working environment factors, and cannot estimate SOH online, and the measurement result is inaccurate. The internal resistance calculation method is generally in the milliohm level, and the internal resistance cannot be accurately measured, so it is difficult to accurately measure SOH. The equivalent cycle number calculation method cannot reflect the parameter status of the battery cell under specific working conditions, so it is difficult to accurately measure SOH. Summary of the invention

[0005] The present invention provides a method, device, electronic device and storage medium for determining a battery state of health, so as to solve the problem of insufficient accuracy in calculating the battery state of health (SOH) estimation.

[0006] In a first aspect, an embodiment of the present invention provides a method for determining a battery health state, comprising:

[0007] Obtain the charge and discharge current, ambient temperature and state of charge of each charge and discharge cycle of the battery;

[0008] Determine the attenuation factor of each charge and discharge cycle according to the charge and discharge current of each charge and discharge cycle, the ambient temperature and the state of charge after the charge and discharge cycle;

[0009] The health status of the battery is determined based on the attenuation factor of each charge and discharge cycle, the current charge and discharge cycle number of the battery, and the total charge and discharge cycle number of the battery.

[0010] Further, the attenuation factor of each charge-discharge cycle is determined according to the charge-discharge current, the ambient temperature and the state of charge after the charge-discharge cycle, including:

[0011] Determining a first sub-attenuation factor for each charge-discharge cycle according to the state of charge after each charge-discharge cycle;

[0012] Determining a second sub-attenuation factor for each charge and discharge cycle according to the ambient temperature of each charge and discharge cycle;

[0013] Determining the third sub-attenuation factor of each charge and discharge cycle according to the average current rate of each charge and discharge cycle;

[0014] The attenuation factor of each charge and discharge cycle is determined according to the product of the first sub-attenuation factor, the second sub-attenuation factor and the third sub-attenuation factor of each charge and discharge cycle.

[0015] Further, the first sub-attenuation factor of each charge-discharge cycle is determined according to the charge state after each charge-discharge cycle, including:

[0016] When the state of charge is within a set state of charge range, the first sub-attenuation factor is 1; when the state of charge is not within the set state of charge range, the first sub-attenuation factor is greater than 1 and less than 1.1.

[0017] Further, the second sub-attenuation factor of each charge-discharge cycle is determined according to the ambient temperature of each charge-discharge cycle, including:

[0018] When the ambient temperature is within the set ambient temperature range, the second sub-attenuation factor is 1; when the ambient temperature is not within the set ambient temperature range, the second sub-attenuation factor is greater than 1 and less than 1.1.

[0019] Further, the third sub-attenuation factor of each charge and discharge cycle is determined according to the average current rate of each charge and discharge cycle, including:

[0020] When the current average rate is within the set current rate range, the third sub-attenuation factor is 1; when the current average rate is not within the set current rate range, the third sub-attenuation factor is greater than 1 and less than 1.1.

[0021] Further, the health status of the battery is determined according to the attenuation factor of each charge and discharge cycle, the current charge and discharge cycle number of the battery, and the total charge and discharge cycle number of the battery, including:

[0022] The battery's state of health SOH is determined according to the following formula:

[0023]

[0024] Among them, λi is the attenuation factor of the i-th charge and discharge cycle, m is the current charge and discharge cycle number of the battery, and n is the total charge and discharge cycle number of the battery.

[0025] In a second aspect, an embodiment of the present invention provides a device for determining a battery health status, including:

[0026] The charging and discharging parameter acquisition module is used to obtain the charging and discharging current, ambient temperature and charge state after each charging and discharging cycle of the battery;

[0027] An attenuation factor determination module, used to determine the attenuation factor of each charge and discharge cycle according to the charge and discharge current of each charge and discharge cycle, the ambient temperature, and the state of charge after the charge and discharge cycle;

[0028] The health state determination module is used to determine the health state of the battery according to the attenuation factor of each charge and discharge cycle, the current charge and discharge cycle number of the battery, and the total charge and discharge cycle number of the battery.

[0029] Furthermore, the attenuation factor determination module includes:

[0030] A first sub-attenuation factor determination unit, used to determine the first sub-attenuation factor of each charge-discharge cycle according to the charge state after each charge-discharge cycle;

[0031] a second sub-attenuation factor determination unit, configured to determine the second sub-attenuation factor of each charge-discharge cycle according to the ambient temperature of each charge-discharge cycle;

[0032] A third sub-attenuation factor determination unit, used to determine the third sub-attenuation factor of each charge and discharge cycle according to the average current rate of each charge and discharge cycle;

[0033] The attenuation factor determination unit is used to determine the attenuation factor of each charge and discharge cycle according to the product of the first sub-attenuation factor, the second sub-attenuation factor and the third sub-attenuation factor of each charge and discharge cycle.

[0034] In a third aspect, an embodiment of the present invention provides an electronic device comprising:

[0035] at least one processor; and

[0036] a memory communicatively connected to the at least one processor; wherein,

[0037] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the method for determining the battery health status described in any embodiment of the present invention.

[0038] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for determining the battery health status described in any embodiment of the present invention when executed.

[0039] The method for determining the battery health status of an embodiment of the present invention determines the attenuation factor of each charge and discharge cycle according to the charge and discharge current of each charge and discharge cycle, the ambient temperature, and the charge state after the charge and discharge cycle, and determines the health status of the battery according to the attenuation factor of each charge and discharge cycle, the current charge and discharge cycle number of the battery, and the total charge and discharge cycle number of the battery. When calculating the battery health status, the charge and discharge current of each charge and discharge cycle, the ambient temperature, and the charge state after the charge and discharge cycle are comprehensively considered, so that the determined battery health status is more accurate and more in line with the actual health status of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A flowchart of a method for determining a battery health status is provided for the first embodiment of the present invention;

[0041] Figure 2 is a flow chart of another method for determining a battery health status provided in Embodiment 2 of the present invention;

[0042] Figure 3 A schematic diagram of the structure of a device for determining a battery health status provided in Embodiment 3 of the present invention;

[0043] Figure 4 It is a structural schematic diagram of an electronic device provided in Embodiment 4 of the present invention. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] Embodiment 1

[0047] This embodiment provides a method for determining a battery health status. Figure 1 A flowchart of a method for determining the health status of a battery is provided for the first embodiment of the present invention. This embodiment is applicable to the accurate estimation of the health status (SOH) of a battery. The method can be performed by a device for determining the health status of a battery, which can be implemented in the form of hardware and / or software. Figure 1 As shown, the method includes:

[0048] S101, obtaining the charge and discharge current, ambient temperature, and state of charge of the battery after each charge and discharge cycle.

[0049] Among them, a charge and discharge cycle includes one charge and one discharge. The charge and discharge current refers to the current during the charge and discharge process of the battery, including the charge current and discharge current of the battery. The charge current and discharge current can be measured multiple times during each charge and discharge cycle and stored. The ambient temperature refers to the temperature at the location of the battery. The temperature can be measured multiple times during the charge and discharge cycle of the battery. The ambient temperature is determined based on the average temperature of the multiple measured temperatures and stored. The state of charge refers to the percentage of the remaining power in the battery to the total capacity of the battery. The state of charge of the battery can be calculated after each charge and discharge cycle and stored.

[0050] S102, determining an attenuation factor of each charge-discharge cycle according to the charge-discharge current of each charge-discharge cycle, the ambient temperature, and the state of charge after the charge-discharge cycle is completed.

[0051] Among them, each charging cycle has a corresponding attenuation factor, and the attenuation factors of different charging and discharging cycles may be the same or different. The attenuation factor of each charging and discharging cycle may be determined according to the charging and discharging current, ambient temperature, and charge state after the charging and discharging cycle of each charging and discharging cycle. It may be that a plurality of different attenuation factors are set, and the attenuation factor corresponding to each cycle is determined according to the range of charging and discharging current, the range of ambient temperature, and the range of charge state after the charging and discharging cycle of each charging and discharging cycle. It may also be that the first sub-attenuation factor of each cycle is determined according to the charge state after the end of each charging and discharging cycle, the second sub-attenuation factor of each cycle is determined according to the ambient temperature of each charging and discharging cycle, the third sub-attenuation factor of each cycle is determined according to the current average multiple of each charging and discharging cycle, and the attenuation factor of each cycle is determined according to the first sub-attenuation factor, the second sub-attenuation factor, and the third sub-attenuation factor.

[0052] S103, determining the health status of the battery according to the attenuation factor of each charge and discharge cycle, the current charge and discharge cycle number of the battery, and the total charge and discharge cycle number of the battery.

[0053] Among them, the current charge and discharge cycle number of the battery is the charge and discharge cycle number of the battery from production to the current moment, and the total charge and discharge cycle number of the battery refers to the total charge and discharge cycle number of the battery from production to the end of its cycle life.

[0054] Optionally, the state of health SOH of the battery is determined according to the following formula:

[0055]

[0056] Wherein, λi is the attenuation factor of the i-th charge and discharge cycle, m is the current charge and discharge cycle number of the battery, and n is the total charge and discharge cycle number of the battery, wherein λi is greater than or equal to 1 and less than or equal to 1.3.

[0057] The method for determining the battery health status of an embodiment of the present invention determines the attenuation factor of each charge and discharge cycle according to the charge and discharge current of each charge and discharge cycle, the ambient temperature, and the charge state after the charge and discharge cycle is completed, and determines the health status of the battery according to the attenuation factor of each charge and discharge cycle, the current charge and discharge cycle number of the battery, and the total charge and discharge cycle number of the battery. When calculating the health status of the battery, the charge and discharge current of each charge and discharge cycle, the ambient temperature, the charge state after the charge and discharge is completed, the current charge and discharge cycle number, and the total charge and discharge cycle number of the battery are comprehensively considered, so that the determined health status of the battery is more accurate and more in line with the actual health status of the battery.

[0058] Embodiment 2

[0059] This embodiment is based on the above embodiment and optimizes the above embodiment. Specifically, the attenuation factor of each charge and discharge cycle is determined according to the charge and discharge current, ambient temperature and charge state after the charge and discharge cycle of each charge and discharge cycle. The optimization is as follows: the first sub-attenuation factor of each charge and discharge cycle is determined according to the charge state after the charge and discharge cycle; the second sub-attenuation factor of each charge and discharge cycle is determined according to the ambient temperature of each charge and discharge cycle; the third sub-attenuation factor of each charge and discharge cycle is determined according to the average current rate of each charge and discharge cycle; the attenuation factor of each charge and discharge cycle is determined according to the product of the first sub-attenuation factor, the second sub-attenuation factor and the third sub-attenuation factor of each charge and discharge cycle. Figure 2 is a flowchart of another method for determining the battery health status provided by the second embodiment of the present invention, referring to Figure 2 , the method comprising:

[0060] S110, obtaining the charge and discharge current, ambient temperature, and state of charge of the battery after each charge and discharge cycle.

[0061] S121, determining a first sub-attenuation factor of each charge-discharge cycle according to the charge state after each charge-discharge cycle.

[0062] The determination method is as follows: a state of charge range is preset; when the state of charge is within this range, the first sub-attenuation factor takes a fixed value; when the state of charge exceeds this range, the first sub-attenuation factor takes a value within a certain range of values.

[0063] Optionally, the first sub-attenuation factor of each charge and discharge cycle is determined based on the state of charge after each charge and discharge cycle, including: when the state of charge is within a set state of charge range, the first sub-attenuation factor is 1; when the state of charge is not within the set state of charge range, the first sub-attenuation factor is greater than 1 and less than 1.1.

[0064] The state of charge range may be [20, 80].

[0065] S122, determining a second sub-attenuation factor for each charge and discharge cycle according to the ambient temperature of each charge and discharge cycle.

[0066] The determination method is as follows: a temperature range is preset, when the ambient temperature is within this range, the second sub-attenuation factor takes a fixed value, and when it exceeds this range, it takes a value within a certain range of values.

[0067] Optionally, determining the second sub-attenuation factor of each charge and discharge cycle based on the ambient temperature of each charge and discharge cycle includes: when the ambient temperature is within a set ambient temperature range, the second sub-attenuation factor is 1; when the ambient temperature is not within the set ambient temperature range, the second sub-attenuation factor is greater than 1 and less than 1.1.

[0068] The temperature range is [20 degrees, 30 degrees].

[0069] S123, determining a third sub-attenuation factor of each charge and discharge cycle according to the average current rate of each charge and discharge cycle.

[0070] The determination method is as follows: a current average rate range is preset, when the current average rate of each charge and discharge cycle is within this range, the second sub-attenuation factor takes a fixed value, and when it exceeds this range, it takes a value within a certain value range. In addition, the current average rate is determined according to the average of the charging current and the discharging current.

[0071] Optionally, determining the third sub-attenuation factor of each charge and discharge cycle based on the average current rate of each charge and discharge cycle includes: when the average current rate is within a set current rate range, the third sub-attenuation factor is 1; when the average current rate is not within the set current rate range, the third sub-attenuation factor is greater than 1 and less than 1.1.

[0072] The set current ratio range is less than 1C.

[0073] S124. Determine an attenuation factor for each charge and discharge cycle according to a product of the first sub-attenuation factor, the second sub-attenuation factor, and the third sub-attenuation factor for each charge and discharge cycle.

[0074] The value of the attenuation factor is equal to the product of the first sub-attenuation factor, the second sub-attenuation factor and the third sub-attenuation factor.

[0075] S130, determining a health state of the battery according to an attenuation factor of each charge and discharge cycle, a current number of charge and discharge cycles of the battery, and a total number of charge and discharge cycles of the battery.

[0076] The method for determining the attenuation factor of each charge and discharge cycle of the embodiment of the present invention is: determine the first sub-attenuation factor according to the charge and discharge current of each charge and discharge cycle, determine the second sub-attenuation factor according to the ambient temperature, and determine the third sub-attenuation factor according to the state of charge after each charge and discharge cycle, and finally determine that the attenuation factor of each charge and discharge cycle is equal to the product of the first, second and third sub-attenuation factors. In this way, the above three factors are substituted into the calculation of the attenuation factor and SOH, which overcomes the problem that the previous calculation of SOH cannot simultaneously take into account the charge and discharge current of each charge and discharge cycle, the ambient temperature and the state of charge after the charge and discharge cycle, and the multiple factors that affect SOH, making the SOH measurement more accurate. In this way, the health status of the TV can be determined more accurately, which is more in line with the actual health status of the TV.

[0077] Embodiment 3

[0078] Figure 3 This is a schematic diagram of a device for determining a battery health status provided by Embodiment 3 of the present invention. Figure 3 As shown, the battery health status determination device S300 includes:

[0079] The charge and discharge parameter acquisition module S301 is used to obtain the charge and discharge current, ambient temperature and charge state after each charge and discharge cycle of the battery;

[0080] The attenuation factor determination module S302 is used to determine the attenuation factor of each charge and discharge cycle according to the charge and discharge current, ambient temperature and the state of charge after the charge and discharge cycle of each charge and discharge cycle;

[0081] The health state determination module S303 is used to determine the health state of the battery according to the attenuation factor of each charge and discharge cycle, the current charge and discharge cycle number of the battery, and the total charge and discharge cycle number of the battery.

[0082] Further, the attenuation factor determination module S302 includes:

[0083] A first sub-attenuation factor determination unit, used to determine the first sub-attenuation factor of each charge-discharge cycle according to the charge state after each charge-discharge cycle;

[0084] a second sub-attenuation factor determination unit, configured to determine a third sub-attenuation factor of each charge-discharge cycle according to an average current multiple of each charge-discharge cycle;

[0085] A third sub-attenuation factor determination unit, used to determine the third sub-attenuation factor of each charge and discharge cycle according to the average current rate of each charge and discharge cycle;

[0086] The attenuation factor determination unit is used to determine the attenuation factor of each charge and discharge cycle according to the product of the first sub-attenuation factor, the second sub-attenuation factor and the third sub-attenuation factor of each charge and discharge cycle.

[0087] Further, the first sub-attenuation factor determination unit is specifically used for:

[0088] When the state of charge is within a set state of charge range, the first sub-attenuation factor is 1; when the state of charge is not within the set state of charge range, the first sub-attenuation factor is greater than 1 and less than 1.1.

[0089] Further, the second sub-attenuation factor determination unit is specifically used for:

[0090] When the ambient temperature is within the set ambient temperature range, the second sub-attenuation factor is 1; when the ambient temperature is not within the set ambient temperature range, the second sub-attenuation factor is greater than 1 and less than 1.1.

[0091] Further, the third sub-attenuation factor determination unit is specifically used for:

[0092] When the current average rate is within the set current rate range, the third sub-attenuation factor is 1; when the current average rate is not within the set current rate range, the third sub-attenuation factor is greater than 1 and less than 1.1.

[0093] Furthermore, the health status determination module is specifically used for:

[0094] The battery's state of health SOH is determined according to the following formula:

[0095]

[0096] Among them, λi is the attenuation factor of the i-th charge and discharge cycle, m is the current charge and discharge cycle number of the battery, and n is the total charge and discharge cycle number of the battery.

[0097] A battery health status determination device provided in an embodiment of the present invention can execute a battery health status determination method provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method.

[0098] Embodiment 4

[0099] Figure 4 : is a structural schematic diagram of an electronic device provided in Embodiment 4 of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0100] like Figure 4As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, ROM 12 and RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0101] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0102] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a method for determining a battery health state.

[0103] In some embodiments, the method for determining the battery health state may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the method for determining the battery health state described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the method for determining the battery health state in any other appropriate manner (e.g., by means of firmware).

[0104] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0105] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0106] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0107] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0108] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0109] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0110] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0111] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining a battery health status, characterized in that: include: Obtain the charge and discharge current, ambient temperature and state of charge of each charge and discharge cycle of the battery; Determine the attenuation factor of each charge and discharge cycle according to the charge and discharge current of each charge and discharge cycle, the ambient temperature and the state of charge after the charge and discharge cycle; Determining a health state of the battery according to an attenuation factor of each charge and discharge cycle, a current number of charge and discharge cycles of the battery, and a total number of charge and discharge cycles of the battery; Wherein, the attenuation factor of each charge and discharge cycle is determined according to the charge and discharge current, ambient temperature and charge state after the charge and discharge cycle of each charge and discharge cycle, including: determining a first sub-attenuation factor of each charge and discharge cycle according to the charge state after the charge and discharge cycle; determining a second sub-attenuation factor of each charge and discharge cycle according to the ambient temperature of each charge and discharge cycle; determining a third sub-attenuation factor of each charge and discharge cycle according to the average current rate of each charge and discharge cycle; determining the attenuation factor of each charge and discharge cycle according to the product of the first sub-attenuation factor, the second sub-attenuation factor and the third sub-attenuation factor of each charge and discharge cycle.

2. The method according to claim 1, characterized in that The method of determining the first sub-attenuation factor of each charge-discharge cycle according to the state of charge after each charge-discharge cycle includes: When the state of charge is within a set state of charge range, the first sub-attenuation factor is 1; when the state of charge is not within the set state of charge range, the first sub-attenuation factor is greater than 1 and less than 1.

1.

3. The method according to claim 1, characterized in that The second sub-attenuation factor of each charge and discharge cycle is determined according to the ambient temperature of each charge and discharge cycle, including: When the ambient temperature is within the set ambient temperature range, the second sub-attenuation factor is 1; when the ambient temperature is not within the set ambient temperature range, the second sub-attenuation factor is greater than 1 and less than 1.

1.

4. The method according to claim 1, characterized in that The third sub-attenuation factor of each charge and discharge cycle is determined according to the average current rate of each charge and discharge cycle, including: When the current average rate is within the set current rate range, the third sub-attenuation factor is 1; when the current average rate is not within the set current rate range, the third sub-attenuation factor is greater than 1 and less than 1.

1.

5. The method according to claim 1, characterized in that The health status of the battery is determined according to the attenuation factor of each charge and discharge cycle, the current charge and discharge cycle number of the battery, and the total charge and discharge cycle number of the battery, including: The battery's state of health SOH is determined according to the following formula: Among them, λi is the attenuation factor of the i-th charge and discharge cycle, m is the current charge and discharge cycle number of the battery, and n is the total charge and discharge cycle number of the battery.

6. A device for determining a battery health status, characterized in that: include: The charging and discharging parameter acquisition module is used to obtain the charging and discharging current, ambient temperature and charge state after each charging and discharging cycle of the battery; An attenuation factor determination module, used to determine the attenuation factor of each charge and discharge cycle according to the charge and discharge current of each charge and discharge cycle, the ambient temperature, and the state of charge after the charge and discharge cycle; A health state determination module, used to determine the health state of the battery according to the attenuation factor of each charge and discharge cycle, the current charge and discharge cycle number of the battery, and the total charge and discharge cycle number of the battery; Among them, the attenuation factor determination module includes: a first sub-attenuation factor determination unit, which is used to determine the first sub-attenuation factor of each charge and discharge cycle according to the charge state after each charge and discharge cycle; a second sub-attenuation factor determination unit, which is used to determine the second sub-attenuation factor of each charge and discharge cycle according to the ambient temperature of each charge and discharge cycle; a third sub-attenuation factor determination unit, which is used to determine the third sub-attenuation factor of each charge and discharge cycle according to the average current rate of each charge and discharge cycle; an attenuation factor determination unit, which is used to determine the attenuation factor of each charge and discharge cycle according to the product of the first sub-attenuation factor, the second sub-attenuation factor and the third sub-attenuation factor of each charge and discharge cycle.

7. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the method for determining the battery health state according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for determining the battery health status according to any one of claims 1 to 5 when executed.

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