WO2024041074A1 - Soh correction system, method and apparatus for swapping battery pack, and terminal and medium - Google Patents

Soh correction system, method and apparatus for swapping battery pack, and terminal and medium Download PDF

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Publication number
WO2024041074A1
WO2024041074A1 PCT/CN2023/097719 CN2023097719W WO2024041074A1 WO 2024041074 A1 WO2024041074 A1 WO 2024041074A1 CN 2023097719 W CN2023097719 W CN 2023097719W WO 2024041074 A1 WO2024041074 A1 WO 2024041074A1
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WO
WIPO (PCT)
Prior art keywords
soh
battery
correction
battery pack
data
Prior art date
Application number
PCT/CN2023/097719
Other languages
French (fr)
Chinese (zh)
Inventor
刘轶鑫
张兴瑞
牛春静
荣常如
翟一明
侯典坤
Original Assignee
中国第一汽车股份有限公司
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Publication of WO2024041074A1 publication Critical patent/WO2024041074A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing

Definitions

  • the invention discloses a battery replacement battery pack SOH correction system, method, terminal and medium, and belongs to the technical field of battery replacement.
  • new energy vehicles have gradually become one of the mainstream transportation tools.
  • the so-called new energy vehicles refer to vehicles that use unconventional vehicle fuels as power sources and integrate advanced technologies in vehicle power control and driving to form vehicles with advanced technical principles, new technologies, and new structures.
  • New energy vehicles can generally be driven by batteries such as solar cells and fuel cells.
  • the health status is closely related to the current available energy and available power of the battery, which directly affects the key vehicle performance such as the cruising range and power of the electric vehicle. Therefore, the estimation accuracy of the battery state of health (SOH) is very important.
  • the present invention proposes a battery pack SOH correction system, method, device, terminal and medium. By relying on the cloud-edge collaboration method and battery swap operation mode, it ensures full SOH accuracy during life cycle.
  • a battery pack SOH correction system including:
  • the battery management system is used to obtain battery pack data and send it to the SOH correction cloud control system;
  • the SOH correction cloud control system is used to obtain the battery pack data sent by the battery management system to obtain the SOH estimated deviation, and obtain the corresponding SOH correction strategy based on the SOH estimated deviation and send it to the SOH correction battery swap station end system;
  • the SOH correction battery swap station system is used to obtain and execute the corresponding SOH correction strategy sent by the SOH correction cloud control system and generate the data required for the corresponding SOH correction strategy and send it to the SOH correction cloud control system;
  • the SOH correction cloud control system is also used to obtain the data required for the corresponding SOH correction strategy and estimate the corresponding corrected battery real SOH data;
  • the battery management system is also used to receive and store the battery SOH data estimated by the SOH correction cloud control system and use the SOH for subsequent battery control strategies.
  • the SOH correction cloud control system is also used to store the corrected battery real SOH data for self-learning training;
  • the battery pack data at least includes: battery temperature, operating current, operating voltage, current cell capacity and current Estimate battery pack SOH.
  • the obtaining the battery pack data sent by the battery management system to obtain the SOH estimation deviation includes:
  • the fitted capacity of the battery pack is obtained through statistical analysis of the temperature field conditions of the single cell throughout its life cycle;
  • the first SOH estimation deviation influence factor is obtained through the battery pack fitting capacity and the current estimated battery pack SOH;
  • the weight coefficient of the first influencing factor is obtained by counting
  • the SOH estimation deviation caused by the unexpected decrease in the battery's true capacity caused by the uneven working environment of the battery cell is obtained through the first SOH estimation deviation influence factor and the first influence factor weight coefficient;
  • the second influence factor weight coefficient is obtained according to the second SOH estimation deviation influence factor and the cloud SOH correction trigger condition statistics
  • the third influence factor weight coefficient is formed based on the third SOH estimation deviation influence factor and the cloud SOH correction trigger condition statistics
  • the second SOH estimation deviation influence factor the second influence factor weight coefficient, the third SOH estimation deviation influence factor and the third influence factor weight coefficient, the SOH estimation caused by the decrease in estimation SOH accuracy caused by severe battery pack usage conditions is obtained. degree of deviation;
  • the SOH estimation deviation is obtained by the SOH estimation deviation caused by the decrease in the estimated SOH accuracy caused by the severe usage conditions of the battery pack and the SOH estimation deviation caused by the unexpected decrease in the battery's true capacity caused by uneven battery working environment.
  • the corresponding SOH correction strategy is obtained based on the SOH estimation deviation degree, including:
  • the SOH correction strategy is to correct SOH by fully charging the battery
  • the SOH correction strategy is the battery’s true SOH using the battery internal resistance estimation method
  • the obtaining and executing the corresponding SOH correction strategy sent by the SOH correction cloud control system and generating the data required for the corresponding SOH correction strategy include:
  • the data required by the SOH correction strategy are: charging power change process time and fixed current;
  • the data required by the SOH correction strategy is: battery internal resistance value.
  • the data required for obtaining the corresponding SOH correction strategy is estimated to obtain the corresponding corrected battery real SOH data, including:
  • SOH 1 is the true SOH data of the battery after correction in the battery full charge mode, I is the fixed current, and Q is the initial battery capacity;
  • the SOH correction strategy is the battery internal resistance estimation method when the battery's true SOH is:
  • R 0 is the normalized battery resistance data
  • ⁇ is the resistance coefficient, which is obtained through the internal resistance-related database and the corresponding resistance value
  • R is the resistance value
  • n is the resistance set in different power stages of high, medium and low. Quantity, n ⁇ 3;
  • the battery full charging mode correction is obtained
  • the real SOH data of the rear battery is obtained.
  • a battery replacement battery pack SOH correction method is provided, which is applied to the battery replacement battery pack SOH correction system described in the first aspect, including:
  • a battery pack SOH correction device including:
  • the SOH correction startup module is used to obtain the battery pack data to obtain the SOH estimated deviation, and obtain the corresponding SOH correction strategy based on the SOH estimated deviation and send it to the SOH correction battery swap station end system;
  • the SOH online estimation module obtains the data required by the SOH correction battery swapping station system to send the corresponding SOH correction strategy and estimates the corresponding corrected battery real SOH data.
  • a terminal including:
  • processors one or more processors
  • memory for storing instructions executable by the one or more processors
  • the one or more processors are configured to:
  • a non-transitory computer-readable storage medium which when the instructions in the storage medium are executed by a processor of the terminal, enables the terminal to execute the second aspect of the embodiment of the present invention. the method described.
  • an application product which causes the terminal to execute the method described in the second aspect of the embodiment of the present invention when the application product is running on the terminal.
  • This patent provides a battery pack SOH correction system, method, device, terminal and medium. Relying on the cloud-edge collaboration method and battery swap operation mode, when the battery is replaced at the battery swap station, the model is used to determine whether correction is needed to realize the battery pack Mandatory corrections are made in the SOH battery swap station to ensure SOH accuracy throughout the entire life cycle; the SOH correction process data is uploaded to the cloud to train the SOH correction model and shorten the SOH algorithm development cycle and verification cycle.
  • Figure 1 is a schematic structural block diagram of a battery pack SOH correction system according to an exemplary embodiment
  • Figure 2 is a flow chart of a battery pack SOH correction system method according to an exemplary embodiment
  • Figure 3 is a schematic structural block diagram of a low-speed pedestrian prompt sound design system for electric vehicles according to an exemplary embodiment
  • Figure 4 is a schematic block diagram of a terminal structure according to an exemplary embodiment.
  • connection should be understood in a broad sense.
  • connection or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components.
  • connection or integral connection
  • connection or integral connection
  • connection can be a mechanical connection or an electrical connection
  • it can be a direct connection or an indirect connection through an intermediate medium
  • it can be an internal connection between two components.
  • specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • FIG. 1 is a structural block diagram of an SOH correction system for a battery pack according to an exemplary embodiment, including: a battery management system, an SOH correction battery swap station system and an SOH correction cloud control system.
  • the SOH correction cloud control system They are connected to the network of the battery management system and the SOH correction battery swap station system respectively. The following will introduce in detail the working method of each of the above components and how they cooperate with each other.
  • the battery management system which is used to obtain battery pack data and send it to the SOH correction cloud control system.
  • the battery pack data at least includes: battery temperature, operating current, operating voltage and the current estimated battery pack SOH.
  • the SOH correction cloud control system is used to obtain the battery pack data sent by the battery management system to obtain the SOH estimated deviation, and obtain the corresponding SOH correction strategy based on the SOH estimated deviation and send it to the SOH correction battery swap station system.
  • the specific steps to obtain the SOH estimation deviation through battery pack data are as follows:
  • the current cell capacity is obtained through battery pack data, and the battery pack fitted capacity is obtained through statistical analysis of the temperature field conditions of the single cell throughout its life cycle.
  • the first SOH estimation deviation influence factor a is obtained through the battery pack fitting capacity and the current estimated battery pack SOH. Estimate deviation based on first SOH
  • the influence factor and the cloud SOH correction trigger condition statistics are obtained to form the first influence factor weight coefficient A.
  • the SOH estimation deviation caused by the unexpected decrease in the battery's true capacity caused by the uneven working environment of the battery cell is obtained through the first SOH estimation deviation influence factor a and the first influence factor weight coefficient A.
  • the second influence factor weight coefficient B is formed; the time when the working voltage is in the low voltage zone is accumulated to obtain the working voltage cumulative time and judge whether it is greater than the working voltage. Cumulative time threshold:
  • the third impact factor weight coefficient C is obtained;
  • the second SOH estimation deviation influence factor b the second influence factor weight coefficient B, the third SOH estimation deviation influence factor c and the third influence factor weight coefficient C, it is obtained that the accuracy of the estimated SOH is reduced due to severe battery pack usage conditions.
  • SOH estimation deviation a ⁇ A+b ⁇ B+c ⁇ C (1)
  • the SOH correction strategy is to correct SOH by fully charging the battery
  • the SOH correction strategy is the battery’s true SOH using the battery internal resistance estimation method
  • the SOH correction battery swapping station system obtains and executes the corresponding SOH correction strategy sent by the SOH correction cloud control system and generates the data required for the corresponding SOH correction strategy and sends it to the SOH correction cloud control system.
  • the SOH correction strategy is to correct the SOH when the battery is fully charged.
  • the SOH correction battery swapping station system charges the battery from the low-end area to the high-end area with a fixed current I until the cell voltage reaches the threshold V1, and the charging capacity change process time is obtained. Therefore, the data required for the SOH correction strategy are: charging power change process time and fixed current;
  • the SOH correction strategy is the battery internal resistance estimation method.
  • the battery swap station system is corrected in the low-end area (usually 10%)/middle-end area (usually 50%)/high-end area (usually 90%) of the battery power. ) to test the battery's DC internal resistance, so the data required for the SOH correction strategy is: at least three battery internal resistance values of the battery internal resistance in three intervals, which are R1, R2 and R3 respectively.
  • the SOH correction cloud control system obtains the data required for the corresponding SOH correction strategy and estimates the real SOH data of the battery after the corresponding correction.
  • the specific steps are as follows:
  • SOH 1 is the true SOH data of the battery after correction in the battery full charge mode, I is the fixed current, and Q is the initial battery capacity;
  • the SOH correction strategy is the battery internal resistance estimation method when the battery's true SOH is:
  • R 0 is the normalized battery resistance data
  • ⁇ is the resistance coefficient, which is obtained through the internal resistance-related database and the corresponding resistance value
  • R is the resistance value
  • n is the resistance set in different power stages of high, medium and low. Quantity, n ⁇ 3;
  • the real SOH data of the battery after the battery full charging method is corrected is obtained.
  • the system at the modified battery swapping station uses the SOH estimation deviation calculation results for self-learning training, and uses the SOH correction trigger conditions to statistically optimize the weight coefficients of different influencing factors; uses the statistical results of the corrected SOH difference values to optimize the SOH correction method judgment thresholds ⁇ 1 and ⁇ 2, and uses the corresponding
  • the corrected battery real SOH data trains the estimation ability and improves the SOH estimation accuracy.
  • the battery management system is also used to receive and store the battery SOH data estimated by the SOH correction cloud control system and use SOH for subsequent battery control strategies.
  • Figure 2 is a flow chart of a method for correcting the SOH of a battery pack according to an exemplary embodiment.
  • the method is implemented by a terminal.
  • the terminal at least includes a CPU, etc.
  • the specific steps include:
  • Step 101 Obtain the battery pack data to obtain the SOH estimated deviation degree, and obtain the corresponding SOH correction strategy based on the SOH estimated deviation degree and send it to the SOH correction battery swap station end system;
  • Step 102 Obtain the data required by the SOH correction battery swapping station system to send the corresponding SOH correction strategy and estimate the corresponding corrected battery real SOH data.
  • This invention relies on the cloud-edge collaboration method and battery swap operation mode.
  • the model is used to determine whether correction is needed, and forced correction in the battery pack SOH battery swap station is achieved to ensure SOH accuracy throughout the life cycle;
  • the SOH correction process is Data is uploaded to the cloud to train the SOH correction model, shortening the SOH algorithm development cycle and verification cycle.
  • Figure 3 is a schematic structural block diagram of an SOH correction device for a battery pack according to an exemplary embodiment, including:
  • the SOH correction startup module 210 is used to obtain the battery pack data to obtain the SOH estimated deviation, and obtain the corresponding SOH correction strategy based on the SOH estimated deviation and send it to the SOH correction battery swap station end system;
  • the SOH online estimation module 220 obtains the SOH correction data required for the corresponding SOH correction strategy sent by the battery swapping station end system and estimates the corresponding corrected battery real SOH data.
  • This invention relies on the cloud-edge collaboration method and the battery swap operation mode.
  • the model is used to determine whether correction is needed, and forced correction in the battery pack SOH battery swap station is achieved to ensure SOH accuracy throughout the life cycle;
  • the SOH correction process is Data is uploaded to the cloud to train the SOH correction model, shortening the SOH algorithm development cycle and verification cycle.
  • FIG 4 is a structural block diagram of a terminal provided by an embodiment of the present application.
  • the terminal may be the terminal in the above embodiment.
  • the terminal 300 may be a portable mobile terminal, such as a smart phone or a tablet computer.
  • the terminal 300 may also be called user equipment, portable terminal and other names.
  • the terminal 300 includes: a processor 301 and a memory 302.
  • the processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc.
  • the processor 301 can adopt at least one hardware form among DSP (Digital Signal Processing, digital signal processing), FPGA (Field-Programmable Gate Array, field programmable gate array), and PLA (Programmable Logic Array, programmable logic array).
  • the processor 301 may also include a main processor and a co-processor.
  • the main processor is a processor used to process data in the wake-up state, also called CPU (Central Processing Unit, central processing unit); the co-processor is A low-power processor used to process data in standby mode.
  • the processor 301 may be integrated with a GPU (Graphics Processing Unit (image processor), GPU is responsible for rendering and drawing the content that needs to be displayed on the display screen.
  • the processor 301 may also include an AI (Artificial Intelligence, artificial intelligence) processor, which is used to process computing operations related to machine learning.
  • AI Artificial Intelligence, artificial intelligence
  • Memory 302 may include one or more computer-readable storage media, which may be tangible and non-transitory. Memory 302 may also include high-speed random access memory, and non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 302 is used to store at least one instruction, and the at least one instruction is used to be executed by the processor 301 to implement a battery replacement provided in this application. Includes SOH correction method.
  • the terminal 300 optionally further includes: a peripheral device interface 303 and at least one peripheral device.
  • the peripheral device includes: at least one of a radio frequency circuit 304, a touch display screen 305, a camera 306, an audio circuit 307, a positioning component 308 and a power supply 309.
  • the peripheral device interface 303 may be used to connect at least one I/O (Input/Output) related peripheral device to the processor 301 and the memory 302 .
  • the processor 301, the memory 302 and the peripheral device interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one of the processor 301, the memory 302 and the peripheral device interface 303 or Both of them can be implemented on separate chips or circuit boards, which is not limited in this embodiment.
  • the radio frequency circuit 304 is used to receive and transmit RF (Radio Frequency, radio frequency) signals, also called electromagnetic signals. Radio frequency circuit 304 communicates with communication networks and other communication devices through electromagnetic signals. The radio frequency circuit 304 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 304 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, and the like. Radio frequency circuitry 304 may communicate via at least one wireless protocol to communicate with other terminals.
  • RF Radio Frequency, radio frequency
  • the wireless communication protocol includes but is not limited to: World Wide Web, metropolitan area network, intranet, mobile communication networks of all generations (2G, 3G, 4G and 5G), wireless local area network and/or WiFi (Wireless Fidelity, wireless fidelity) network.
  • the radio frequency circuit 304 may also include NFC (Near Field Communication) related circuits, which is not limited in this application.
  • the touch display screen 305 is used to display UI (User Interface, user interface).
  • the UI can include graphics, text, icons, videos, and any combination thereof.
  • Touch display 305 also has the ability to collect touch signals on or above the surface of touch display 305 .
  • the touch signal can be input to the processor 301 as a control signal for processing.
  • the touch display screen 305 is used to provide virtual buttons and/or virtual keyboard, also called soft buttons and/or soft keyboard.
  • the touch display screen 305 may be a flexible display screen, disposed on the curved surface or folding surface of the terminal 300. Even, the touch display screen 305 can also be set in a non-rectangular irregular shape, that is, a special-shaped screen.
  • the touch display screen 305 can be made of LCD (Liquid Crystal Display, liquid crystal display), OLED (Organic Light-Emitting Diode, organic light-emitting diode) and other materials.
  • the camera assembly 306 is used to capture images or videos.
  • the camera assembly 306 includes a front camera and a rear camera.
  • the front camera is used for video calls or selfies
  • the rear camera is used for taking photos or videos.
  • camera assembly 306 may also include a flash.
  • the flash can be a single color temperature flash or a dual color temperature flash. Dual color temperature flash refers to warm light flash and cold light flash
  • the combination of lamps can be used for light compensation under different color temperatures.
  • Audio circuit 307 is used to provide an audio interface between the user and terminal 300.
  • Audio circuitry 307 may include a microphone and speakers.
  • the microphone is used to collect sound waves from the user and the environment, and convert the sound waves into electrical signals that are input to the processor 301 for processing, or to the radio frequency circuit 304 to implement voice communication. For the purpose of stereo collection or noise reduction, there may be multiple microphones, which are respectively arranged at different parts of the terminal 300 .
  • the microphone can also be an array microphone or an omnidirectional collection microphone.
  • the speaker is used to convert electrical signals from the processor 301 or the radio frequency circuit 304 into sound waves.
  • the loudspeaker can be a traditional membrane loudspeaker or a piezoelectric ceramic loudspeaker.
  • audio circuitry 307 may also include a headphone jack.
  • the positioning component 308 is used to locate the current geographical location of the terminal 300 to implement navigation or LBS (Location Based Service).
  • the positioning component 308 may be a positioning component based on the American GPS (Global Positioning System), China's Beidou system, or Russia's Galileo system.
  • the power supply 309 is used to provide power to various components in the terminal 300 .
  • Power source 309 may be AC, DC, disposable batteries, or rechargeable batteries.
  • the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. Wired rechargeable batteries are batteries that are charged through wired lines, and wireless rechargeable batteries are batteries that are charged through wireless coils.
  • the rechargeable battery can also be used to support fast charging technology.
  • FIG. 4 does not limit the terminal 300, and it may include more or fewer components than shown, or combine certain components, or adopt different component arrangements.
  • a computer-readable storage medium having stored thereon A computer program that, when executed by a processor, implements a battery pack SOH correction method as provided by all invention embodiments of this application.
  • the computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium.
  • the computer-readable storage medium may be, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any combination thereof. More specific examples (non-exhaustive list) of computer readable storage media include: electrical connections having one or more conductors, portable computer disks, hard drives, random access memory (RAM), read only memory (ROM), Erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.
  • a computer-readable storage medium may be any tangible medium that contains or stores a program for use by or in connection with an instruction execution system, apparatus, or device.
  • a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave carrying computer-readable program code therein. Such propagated data signals may take a variety of forms, including - but not limited to - electromagnetic signals, optical signals, or any suitable combination of the above.
  • a computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device .
  • Program code embodied on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
  • Computer program code for performing the operations of the present invention may be written in one or more programming languages, including object-oriented programming languages such as Java, Smalltalk, C++, and conventional Procedural programming language—such as "C" or a similar programming language.
  • the program code can be fully executed on the user's computer, Execute partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server.
  • the remote computer can be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (such as an Internet service provider through Internet connection).
  • LAN local area network
  • WAN wide area network
  • Internet service provider such as an Internet service provider through Internet connection
  • an application product including one or more instructions, which can be executed by the processor 301 of the above-mentioned device to complete the above-mentioned battery pack SOH correction. method.

Abstract

The present invention belongs to the technical field of swapping batteries. Disclosed are an SOH correction system and method for a swapping battery pack, and a terminal and a medium. The system comprises: a battery management system, which is used for acquiring battery pack data and sending same to an SOH-correction cloud control system; the SOH-correction cloud control system, which is used for acquiring the battery pack data sent by the battery management system, so as to obtain an SOH estimation deviation, obtaining a corresponding SOH correction strategy according to the SOH estimation deviation, and sending the SOH correction strategy to an SOH-correction battery-swapping station end system; and the SOH-correction battery-swapping station end system, which is used for acquiring and executing the corresponding SOH correction strategy sent by the SOH-correction cloud control system, generating data required by the corresponding SOH correction strategy, and sending the data to the SOH-correction cloud control system, wherein the SOH-correction cloud control system is further used for acquiring the data required by the corresponding SOH correction strategy, and performing estimation to obtain corresponding real SOH data of a battery after correction. The present invention relies on a cloud-edge collaborative mode and a battery-swapping operation mode, so as to ensure the precision of an SOH in a full life cycle.

Description

一种换电电池包SOH修正系统、方法、装置、终端及介质A battery pack SOH correction system, method, device, terminal and medium 技术领域Technical field
本发明公开了一种换电电池包SOH修正系统、方法、终端及介质，属于换电电池技术领域。The invention discloses a battery replacement battery pack SOH correction system, method, terminal and medium, and belongs to the technical field of battery replacement.
背景技术Background technique
随着能源技术的发展，以及人类环境保护意识的提高，新能源车辆逐渐成为主流交通运输工具之一。所谓新能源车辆是指采用非常规的车用燃料作为动力来源，综合车辆的动力控制和驱动方面的先进技术，形成的技术原理先进、具有新技术、新结构的汽车。With the development of energy technology and the improvement of human environmental protection awareness, new energy vehicles have gradually become one of the mainstream transportation tools. The so-called new energy vehicles refer to vehicles that use unconventional vehicle fuels as power sources and integrate advanced technologies in vehicle power control and driving to form vehicles with advanced technical principles, new technologies, and new structures.
新能源车辆一般可以通过电池如太阳能电池、燃料电池等进行驱动。在电池包全生命周期中，健康状态与当前电池的可用能量，可用功率关系密切，直接影响电动汽车的续航里程和动力性等整车关键性能，因此电池健康状态(SOH)的估算准确性十分重要。New energy vehicles can generally be driven by batteries such as solar cells and fuel cells. In the entire life cycle of the battery pack, the health status is closely related to the current available energy and available power of the battery, which directly affects the key vehicle performance such as the cruising range and power of the electric vehicle. Therefore, the estimation accuracy of the battery state of health (SOH) is very important.
当前SOH估算的技术问题在于：The technical problems with current SOH estimation are:
(1)老化路径对电池真实SOH的影响研究不深入，在电池全生命周期的对SOH估计缺少数据支撑，SOH精度待提升；(1) The impact of the aging path on the actual SOH of the battery is not well studied. There is a lack of data support for SOH estimation during the entire battery life cycle, and the accuracy of SOH needs to be improved;
(2)SOH算法开发需结合电池数据，需大量试验，开发周期长，验证周期长。(2) SOH algorithm development needs to be combined with battery data, requires a lot of testing, has a long development cycle, and has a long verification cycle.
发明内容Contents of the invention
针对现有技术的缺陷，本发明提出一种换电电池包SOH修正系统、方法、装置、终端及介质，通过依托云边协同方式与换电运行模式，确保全 生命周期内SOH精度。In view of the shortcomings of the existing technology, the present invention proposes a battery pack SOH correction system, method, device, terminal and medium. By relying on the cloud-edge collaboration method and battery swap operation mode, it ensures full SOH accuracy during life cycle.
本发明的技术方案如下：The technical solution of the present invention is as follows:
根据本发明实施例的第一方面，提供一种换电电池包SOH修正系统，包括：According to a first aspect of the embodiment of the present invention, a battery pack SOH correction system is provided, including:
电池管理系统，用于获取电池包数据发送给SOH修正云端控制系统；The battery management system is used to obtain battery pack data and send it to the SOH correction cloud control system;
SOH修正云端控制系统，用于获取所述电池管理系统发送的电池包数据得到SOH估算偏差度，并根据所述SOH估算偏差度得到相应的SOH修正策略发送给SOH修正换电站端系统；The SOH correction cloud control system is used to obtain the battery pack data sent by the battery management system to obtain the SOH estimated deviation, and obtain the corresponding SOH correction strategy based on the SOH estimated deviation and send it to the SOH correction battery swap station end system;
SOH修正换电站端系统，用于获取并执行所述SOH修正云端控制系统发送的相应的SOH修正策略并生成相应的SOH修正策略所需数据发送给SOH修正云端控制系统；The SOH correction battery swap station system is used to obtain and execute the corresponding SOH correction strategy sent by the SOH correction cloud control system and generate the data required for the corresponding SOH correction strategy and send it to the SOH correction cloud control system;
所述SOH修正云端控制系统还用于获取相应的SOH修正策略所需数据估算得到相应修正后电池真实SOH数据；The SOH correction cloud control system is also used to obtain the data required for the corresponding SOH correction strategy and estimate the corresponding corrected battery real SOH data;
所述的电池管理系统还用于接收及存储SOH修正云端控制系统估算得到的电池SOH数据并将SOH用于后续电池控制策略。The battery management system is also used to receive and store the battery SOH data estimated by the SOH correction cloud control system and use the SOH for subsequent battery control strategies.
优选的是，所述SOH修正云端控制系统还用于将修正后电池真实SOH数据储存进行自学习训练；所述电池包数据至少包括：电池温度、工作电流、工作电压、当前单体容量和当前估算电池包SOH。Preferably, the SOH correction cloud control system is also used to store the corrected battery real SOH data for self-learning training; the battery pack data at least includes: battery temperature, operating current, operating voltage, current cell capacity and current Estimate battery pack SOH.
优选的是，所述获取所述电池管理系统发送的电池包数据得到SOH估算偏差度，包括：Preferably, the obtaining the battery pack data sent by the battery management system to obtain the SOH estimation deviation includes:
通过对单体电芯全生命周期的温场情况统计分析得到电池包拟合容量；The fitted capacity of the battery pack is obtained through statistical analysis of the temperature field conditions of the single cell throughout its life cycle;
通过所述电池包拟合容量与当前估算电池包SOH得到第一SOH估算偏差度影响因子；The first SOH estimation deviation influence factor is obtained through the battery pack fitting capacity and the current estimated battery pack SOH;
根据所述第一SOH估算偏差度影响因子和云端SOH修正触发条件统 计数得到形成第一影响因子权重系数；According to the first SOH estimation deviation impact factor and the cloud SOH correction trigger condition system The weight coefficient of the first influencing factor is obtained by counting;
通过第一SOH估算偏差度影响因子和第一影响因子权重系数得到电芯工作环境不均一引起电池真实容量非预期下降导致的SOH估算偏差度；The SOH estimation deviation caused by the unexpected decrease in the battery's true capacity caused by the uneven working environment of the battery cell is obtained through the first SOH estimation deviation influence factor and the first influence factor weight coefficient;
对所述工作电流大于阈值的时间进行累计得到工作电流累计时间并判断是否大于工作电流累计时间阈值：Accumulate the time when the operating current is greater than the threshold to obtain the operating current accumulated time and determine whether it is greater than the operating current accumulated time threshold:
是，则通过当前工作电流累计时间得到所述第二SOH估算偏差度影响因子；If yes, then the second SOH estimation deviation influence factor is obtained through the current operating current accumulation time;
否，继续进行对所述工作电流大于阈值的时间进行累计；No, continue to accumulate the time when the operating current is greater than the threshold;
根据所述第二SOH估算偏差度影响因子和云端SOH修正触发条件统计数得到形成第二影响因子权重系数；The second influence factor weight coefficient is obtained according to the second SOH estimation deviation influence factor and the cloud SOH correction trigger condition statistics;
对所述工作电压在低电压区的时间进行累计得到工作电压累计时间并判断是否大于工作电压累计时间阈值：Accumulate the time the working voltage is in the low voltage zone to obtain the working voltage cumulative time and determine whether it is greater than the working voltage cumulative time threshold:
是，则通过当前工作电压累计时间得到所述第三SOH估算偏差度影响因子；If yes, then the third SOH estimation deviation influence factor is obtained through the current working voltage accumulation time;
否，继续对所述工作电压在低电压区的时间进行累计；No, continue to accumulate the time the working voltage is in the low voltage zone;
根据所述第三SOH估算偏差度影响因子和云端SOH修正触发条件统计数得到形成第三影响因子权重系数；The third influence factor weight coefficient is formed based on the third SOH estimation deviation influence factor and the cloud SOH correction trigger condition statistics;
根据所述第二SOH估算偏差度影响因子、第二影响因子权重系数、第三SOH估算偏差度影响因子和第三影响因子权重系数得到电池包使用工况剧烈引起估算SOH精度下降导致的SOH估算偏差度；According to the second SOH estimation deviation influence factor, the second influence factor weight coefficient, the third SOH estimation deviation influence factor and the third influence factor weight coefficient, the SOH estimation caused by the decrease in estimation SOH accuracy caused by severe battery pack usage conditions is obtained. degree of deviation;
所述电池包使用工况剧烈引起估算SOH精度下降导致的SOH估算偏差度和电芯工作环境不均一引起电池真实容量非预期下降导致的SOH估算偏差度得到SOH估算偏差度。The SOH estimation deviation is obtained by the SOH estimation deviation caused by the decrease in the estimated SOH accuracy caused by the severe usage conditions of the battery pack and the SOH estimation deviation caused by the unexpected decrease in the battery's true capacity caused by uneven battery working environment.
优选的是，所述根据所述SOH估算偏差度得到相应的SOH修正策略，包括： Preferably, the corresponding SOH correction strategy is obtained based on the SOH estimation deviation degree, including:
σ1<电池包SOH估算偏差度<σ2时，所述SOH修正策略为电池满充方式修正SOH；When σ1<battery pack SOH estimation deviation<σ2, the SOH correction strategy is to correct SOH by fully charging the battery;
电池SOH估算偏差度>σ2时，所述SOH修正策略为电池内阻估算方式电池真实的SOH；When the battery SOH estimation deviation is >σ2, the SOH correction strategy is the battery’s true SOH using the battery internal resistance estimation method;
电池SOH估算偏差度<σ1时，SOH不修正。When the battery SOH estimation deviation is <σ1, the SOH will not be corrected.
优选的是，所述获取并执行所述SOH修正云端控制系统发送的相应的SOH修正策略并生成相应的SOH修正策略所需数据，包括：Preferably, the obtaining and executing the corresponding SOH correction strategy sent by the SOH correction cloud control system and generating the data required for the corresponding SOH correction strategy include:
所述SOH修正策略为电池满充方式修正SOH时，所述SOH修正策略所需数据为：充电电量变化过程时间和固定电流；When the SOH correction strategy is to correct SOH in the battery full charge mode, the data required by the SOH correction strategy are: charging power change process time and fixed current;
所述SOH修正策略为电池内阻估算方式电池真实的SOH时，所述SOH修正策略所需数据为：电池内阻阻值。When the SOH correction strategy is the actual SOH of the battery using the battery internal resistance estimation method, the data required by the SOH correction strategy is: battery internal resistance value.
优选的是，所述获取相应的SOH修正策略所需数据估算得到相应修正后电池真实SOH数据，包括：Preferably, the data required for obtaining the corresponding SOH correction strategy is estimated to obtain the corresponding corrected battery real SOH data, including:
所述SOH修正策略为电池满充方式修正SOH时，通过公式(1)得到电池满充方式修正后电池真实SOH数据：
When the SOH correction strategy is to correct the SOH in the battery full charge mode, the true SOH data of the battery after the battery full charge mode is corrected is obtained through formula (1):
其中：SOH1为电池满充方式修正后电池真实SOH数据，I为固定电流，Q为初始电池容量；Among them: SOH 1 is the true SOH data of the battery after correction in the battery full charge mode, I is the fixed current, and Q is the initial battery capacity;
所述SOH修正策略为电池内阻估算方式电池真实的SOH时：The SOH correction strategy is the battery internal resistance estimation method when the battery's true SOH is:
通过公式(2)得到归一化电池电阻数据：
R0＝β1×R1+β2×R2+...+βn×Rn    (2)The normalized battery resistance data is obtained through formula (2):
R 0 =β 1 ×R 1 +β 2 ×R 2 +...+β n ×R n (2)
其中，R0为归一化电池电阻数据，β为电阻系数，通过内阻相关的数据库与相应电阻阻值得到，R为电阻阻值，n为高、中、低不同电量阶段内设置的电阻数量，n≥3；Among them, R 0 is the normalized battery resistance data, β is the resistance coefficient, which is obtained through the internal resistance-related database and the corresponding resistance value, R is the resistance value, and n is the resistance set in different power stages of high, medium and low. Quantity, n≥3;
根据所述归一化电池电阻与内阻相关的数据库得到电池满充方式修正 后电池真实SOH数据。According to the database related to the normalized battery resistance and internal resistance, the battery full charging mode correction is obtained The real SOH data of the rear battery.
根据本发明实施例的第二方面，提供一种换电电池包SOH修正方法，应用于第一方面所述的换电电池包SOH修正系统，包括：According to a second aspect of the embodiment of the present invention, a battery replacement battery pack SOH correction method is provided, which is applied to the battery replacement battery pack SOH correction system described in the first aspect, including:
获取所述电池包数据得到SOH估算偏差度，并根据所述SOH估算偏差度得到相应的SOH修正策略发送给SOH修正换电站端系统；Obtain the battery pack data to obtain the SOH estimation deviation, and obtain the corresponding SOH correction strategy based on the SOH estimation deviation and send it to the SOH correction battery swap station end system;
获取所述SOH修正换电站端系统发送相应的SOH修正策略所需数据估算得到相应修正后电池真实SOH数据。Obtain the data required by the SOH correction battery swapping station system to send the corresponding SOH correction strategy and estimate the corresponding corrected battery real SOH data.
根据本发明实施例的第三方面，提供一种换电电池包SOH修正装置，包括：According to a third aspect of the embodiment of the present invention, a battery pack SOH correction device is provided, including:
SOH修正启动模块，用于获取所述电池包数据得到SOH估算偏差度，并根据所述SOH估算偏差度得到相应的SOH修正策略发送给SOH修正换电站端系统；The SOH correction startup module is used to obtain the battery pack data to obtain the SOH estimated deviation, and obtain the corresponding SOH correction strategy based on the SOH estimated deviation and send it to the SOH correction battery swap station end system;
SOH在线估算模块，获取所述SOH修正换电站端系统发送相应的SOH修正策略所需数据估算得到相应修正后电池真实SOH数据。The SOH online estimation module obtains the data required by the SOH correction battery swapping station system to send the corresponding SOH correction strategy and estimates the corresponding corrected battery real SOH data.
根据本发明实施例的第四方面，提供一种终端，包括：According to a fourth aspect of the embodiment of the present invention, a terminal is provided, including:
一个或多个处理器；one or more processors;
用于存储所述一个或多个处理器可执行指令的存储器；memory for storing instructions executable by the one or more processors;
其中，所述一个或多个处理器被配置为：Wherein, the one or more processors are configured to:
执行本发明实施例的第二方面所述的方法。The method described in the second aspect of the embodiment of the present invention is performed.
根据本发明实施例的第五方面，提供一种非临时性计算机可读存储介质，当所述存储介质中的指令由终端的处理器执行时，使得终端能够执行本发明实施例的第二方面所述的方法。According to a fifth aspect of the embodiment of the present invention, a non-transitory computer-readable storage medium is provided, which when the instructions in the storage medium are executed by a processor of the terminal, enables the terminal to execute the second aspect of the embodiment of the present invention. the method described.
根据本发明实施例的第六方面，提供一种应用程序产品，当应用程序产品在终端在运行时，使得终端执行本发明实施例的第二方面所述的方法。 According to a sixth aspect of the embodiment of the present invention, an application product is provided, which causes the terminal to execute the method described in the second aspect of the embodiment of the present invention when the application product is running on the terminal.
本发明的有益效果在于：The beneficial effects of the present invention are:
本专利提供一种换电电池包SOH修正系统、方法、装置、终端及介质，依托云边协同方式与换电运行模式，当电池更换至换电站时，通过模型判断是否需要修正，实现电池包SOH换电站内强制修正，确保全生命周期内SOH精度；将SOH修正过程数据上传云端，训练SOH修正模型，缩短SOH算法开发周期和验证周期。This patent provides a battery pack SOH correction system, method, device, terminal and medium. Relying on the cloud-edge collaboration method and battery swap operation mode, when the battery is replaced at the battery swap station, the model is used to determine whether correction is needed to realize the battery pack Mandatory corrections are made in the SOH battery swap station to ensure SOH accuracy throughout the entire life cycle; the SOH correction process data is uploaded to the cloud to train the SOH correction model and shorten the SOH algorithm development cycle and verification cycle.
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本发明。It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention.
附图说明Description of drawings
图1是根据一示例性实施例示出的一种换电电池包SOH修正系统的结构示意框图；Figure 1 is a schematic structural block diagram of a battery pack SOH correction system according to an exemplary embodiment;
图2是根据一示例性实施例示出的一种换电电池包SOH修正系统方法的流程图；Figure 2 is a flow chart of a battery pack SOH correction system method according to an exemplary embodiment;
图3是根据一示例性实施例示出的一种电动车低速行人提示音设计系统的结构示意框图；Figure 3 is a schematic structural block diagram of a low-speed pedestrian prompt sound design system for electric vehicles according to an exemplary embodiment;
图4是根据一示例性实施例示出的一种终端结构示意框图。Figure 4 is a schematic block diagram of a terminal structure according to an exemplary embodiment.
具体实施方式Detailed ways
下面将结合附图对本发明的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.
在本发明的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附 图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the attached The orientations or positional relationships shown in the figures are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed and operated in specific orientations, and therefore cannot be understood as limiting the present invention. Limitations of Invention.
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
实施例一Embodiment 1
图1是根据一示例性实施例示出的一种换电电池包SOH修正系统的结构框图，包括：电池管理系统、SOH修正换电站端系统和SOH修正云端控制系统，所述SOH修正云端控制系统分别与电池管理系统和SOH修正换电站端系统网络连接，下面将详细介绍下上述各组件的工作方式以及相互之间的配合方式。Figure 1 is a structural block diagram of an SOH correction system for a battery pack according to an exemplary embodiment, including: a battery management system, an SOH correction battery swap station system and an SOH correction cloud control system. The SOH correction cloud control system They are connected to the network of the battery management system and the SOH correction battery swap station system respectively. The following will introduce in detail the working method of each of the above components and how they cooperate with each other.
首先介绍一下电池管理系统，其用于获取电池包数据发送给SOH修正云端控制系统，电池包数据至少包括：电池温度、工作电流、工作电压和当前估算电池包SOH。First, let’s introduce the battery management system, which is used to obtain battery pack data and send it to the SOH correction cloud control system. The battery pack data at least includes: battery temperature, operating current, operating voltage and the current estimated battery pack SOH.
SOH修正云端控制系统，其用于获取电池管理系统发送的电池包数据得到SOH估算偏差度，并根据SOH估算偏差度得到相应的SOH修正策略发送给SOH修正换电站端系统。其中，通过电池包数据得到SOH估算偏差度的具体步骤如下：The SOH correction cloud control system is used to obtain the battery pack data sent by the battery management system to obtain the SOH estimated deviation, and obtain the corresponding SOH correction strategy based on the SOH estimated deviation and send it to the SOH correction battery swap station system. Among them, the specific steps to obtain the SOH estimation deviation through battery pack data are as follows:
通过电池包数据得到当前单体容量，通过对单体电芯全生命周期的温场情况统计分析得到电池包拟合容量。通过电池包拟合容量与当前估算电池包SOH得到第一SOH估算偏差度影响因子a。根据第一SOH估算偏差 度影响因子和云端SOH修正触发条件统计数得到形成第一影响因子权重系数A。通过第一SOH估算偏差度影响因子a和第一影响因子权重系数A得到电芯工作环境不均一引起电池真实容量非预期下降导致的SOH估算偏差度。The current cell capacity is obtained through battery pack data, and the battery pack fitted capacity is obtained through statistical analysis of the temperature field conditions of the single cell throughout its life cycle. The first SOH estimation deviation influence factor a is obtained through the battery pack fitting capacity and the current estimated battery pack SOH. Estimate deviation based on first SOH The influence factor and the cloud SOH correction trigger condition statistics are obtained to form the first influence factor weight coefficient A. The SOH estimation deviation caused by the unexpected decrease in the battery's true capacity caused by the uneven working environment of the battery cell is obtained through the first SOH estimation deviation influence factor a and the first influence factor weight coefficient A.
对工作电流大于阈值的时间进行累计得到工作电流累计时间并判断是否大于工作电流累计时间阈值：Accumulate the time when the operating current is greater than the threshold to obtain the operating current accumulated time and determine whether it is greater than the operating current accumulated time threshold:
是，则通过当前工作电流累计时间得到所述第二SOH估算偏差度影响因子b；If yes, then the second SOH estimation deviation influence factor b is obtained through the current operating current accumulation time;
否，继续进行对所述工作电流大于阈值的时间进行累计；No, continue to accumulate the time when the operating current is greater than the threshold;
根据第二SOH估算偏差度影响因子b和云端SOH修正触发条件统计数得到形成第二影响因子权重系数B；对工作电压在低电压区的时间进行累计得到工作电压累计时间并判断是否大于工作电压累计时间阈值：According to the second SOH estimation deviation influence factor b and the cloud SOH correction trigger condition statistics, the second influence factor weight coefficient B is formed; the time when the working voltage is in the low voltage zone is accumulated to obtain the working voltage cumulative time and judge whether it is greater than the working voltage. Cumulative time threshold:
是，则通过当前工作电压累计时间得到所述第三SOH估算偏差度影响因子c；If yes, then the third SOH estimated deviation influence factor c is obtained through the current operating voltage accumulation time;
否，继续对工作电压在低电压区的时间进行累计；No, continue to accumulate the time the operating voltage is in the low voltage zone;
根据第三SOH估算偏差度影响因子c和云端SOH修正触发条件统计数得到形成第三影响因子权重系数C；According to the third SOH estimation deviation impact factor c and the cloud SOH correction trigger condition statistics, the third impact factor weight coefficient C is obtained;
根据所述第二SOH估算偏差度影响因子b、第二影响因子权重系数B、第三SOH估算偏差度影响因子c和第三影响因子权重系数C得到电池包使用工况剧烈引起估算SOH精度下降导致的SOH估算偏差度；According to the second SOH estimation deviation influence factor b, the second influence factor weight coefficient B, the third SOH estimation deviation influence factor c and the third influence factor weight coefficient C, it is obtained that the accuracy of the estimated SOH is reduced due to severe battery pack usage conditions. The resulting deviation in SOH estimation;
所述电池包使用工况剧烈引起估算SOH精度下降导致的SOH估算偏差度和电芯工作环境不均一引起电池真实容量非预期下降导致的SOH估算偏差度通过公式(1)得到SOH估算偏差度。
SOH估算偏差度＝a×A+b×B+c×C      (1)The SOH estimation deviation caused by the decrease in the estimated SOH accuracy caused by the severe operating conditions of the battery pack and the SOH estimation deviation caused by the unexpected decrease in the battery's true capacity caused by the non-uniform working environment of the battery cell are obtained through formula (1).
SOH estimation deviation = a×A+b×B+c×C (1)
其中，根据SOH估算偏差度得到相应的SOH修正策略的具体步骤如 下：Among them, the specific steps to obtain the corresponding SOH correction strategy based on the SOH estimation deviation are as follows: Down:
σ1<电池包SOH估算偏差度<σ2时，所述SOH修正策略为电池满充方式修正SOH；When σ1<battery pack SOH estimation deviation<σ2, the SOH correction strategy is to correct SOH by fully charging the battery;
电池SOH估算偏差度>σ2时，所述SOH修正策略为电池内阻估算方式电池真实的SOH；When the battery SOH estimation deviation is >σ2, the SOH correction strategy is the battery’s true SOH using the battery internal resistance estimation method;
电池SOH估算偏差度<σ1时，SOH不修正。When the battery SOH estimation deviation is <σ1, the SOH will not be corrected.
SOH修正换电站端系统获取并执行SOH修正云端控制系统发送的相应的SOH修正策略并生成相应的SOH修正策略所需数据发送给SOH修正云端控制系统。SOH修正策略为电池满充方式修正SOH时，SOH修正换电站端系统将电池从电量低端区充电至高端区以固定电流I充电至单体电压达到阈值V1，得到充电电量变化过程时间。从而SOH修正策略所需数据为：充电电量变化过程时间和固定电流；The SOH correction battery swapping station system obtains and executes the corresponding SOH correction strategy sent by the SOH correction cloud control system and generates the data required for the corresponding SOH correction strategy and sends it to the SOH correction cloud control system. The SOH correction strategy is to correct the SOH when the battery is fully charged. The SOH correction battery swapping station system charges the battery from the low-end area to the high-end area with a fixed current I until the cell voltage reaches the threshold V1, and the charging capacity change process time is obtained. Therefore, the data required for the SOH correction strategy are: charging power change process time and fixed current;
所述SOH修正策略为电池内阻估算方式电池真实的SOH时，修正换电站端系统分别在电池电量低端区(通常10％)/中端区(通常50％)/高端区(通常90％)，对电池直流内阻进行测试，从而SOH修正策略所需数据为：三个区间段的电池内阻的至少三个电池内阻阻值，分别为R1、R2和R3。The SOH correction strategy is the battery internal resistance estimation method. When the battery's true SOH is correct, the battery swap station system is corrected in the low-end area (usually 10%)/middle-end area (usually 50%)/high-end area (usually 90%) of the battery power. ) to test the battery's DC internal resistance, so the data required for the SOH correction strategy is: at least three battery internal resistance values of the battery internal resistance in three intervals, which are R1, R2 and R3 respectively.
SOH修正云端控制系统获取相应的SOH修正策略所需数据估算得到相应修正后电池真实SOH数据，具体步骤如下：The SOH correction cloud control system obtains the data required for the corresponding SOH correction strategy and estimates the real SOH data of the battery after the corresponding correction. The specific steps are as follows:
SOH修正策略为电池满充方式修正SOH时，通过公式(2)得到电池满充方式修正后电池真实SOH数据：
When the SOH correction strategy is to correct the SOH in the battery full charge mode, the true SOH data of the battery after the battery full charge mode is corrected is obtained through formula (2):
其中：SOH1为电池满充方式修正后电池真实SOH数据，I为固定电流，Q为初始电池容量；Among them: SOH 1 is the true SOH data of the battery after correction in the battery full charge mode, I is the fixed current, and Q is the initial battery capacity;
SOH修正策略为电池内阻估算方式电池真实的SOH时： The SOH correction strategy is the battery internal resistance estimation method when the battery's true SOH is:
通过公式(3)得到归一化电池电阻数据：
R0＝β1×R1+β2×R2+...+βn×Rn      (3)The normalized battery resistance data is obtained through formula (3):
R 0 =β 1 ×R 1 +β 2 ×R 2 +...+β n ×R n (3)
其中，R0为归一化电池电阻数据，β为电阻系数，通过内阻相关的数据库与相应电阻阻值得到，R为电阻阻值，n为高、中、低不同电量阶段内设置的电阻数量，n≥3；Among them, R 0 is the normalized battery resistance data, β is the resistance coefficient, which is obtained through the internal resistance-related database and the corresponding resistance value, R is the resistance value, and n is the resistance set in different power stages of high, medium and low. Quantity, n≥3;
根据归一化电池电阻与内阻相关的数据库得到电池满充方式修正后电池真实SOH数据。According to the database related to the normalized battery resistance and internal resistance, the real SOH data of the battery after the battery full charging method is corrected is obtained.
修正换电站端系统利用SOH估算偏差度计算结果进行自学习训练，利用SOH修正触发条件统计优化不同的影响因子权重系数；利用修正SOH差异值统计结果优化SOH修正方法判断阈值σ1、σ2，利用相应修正后电池真实SOH数据训练估算能力，提升SOH估算精度。The system at the modified battery swapping station uses the SOH estimation deviation calculation results for self-learning training, and uses the SOH correction trigger conditions to statistically optimize the weight coefficients of different influencing factors; uses the statistical results of the corrected SOH difference values to optimize the SOH correction method judgment thresholds σ1 and σ2, and uses the corresponding The corrected battery real SOH data trains the estimation ability and improves the SOH estimation accuracy.
电池管理系统还用于接收及存储SOH修正云端控制系统估算得到的电池SOH数据并将SOH用于后续电池控制策略。The battery management system is also used to receive and store the battery SOH data estimated by the SOH correction cloud control system and use SOH for subsequent battery control strategies.
实施例二Embodiment 2
图2是根据一示例性实施例示出的一种换电电池包SOH修正方法的流程图，该方法由终端实现，终端至少包括CPU等，具体步骤包括：Figure 2 is a flow chart of a method for correcting the SOH of a battery pack according to an exemplary embodiment. The method is implemented by a terminal. The terminal at least includes a CPU, etc. The specific steps include:
步骤101，获取电池包数据得到SOH估算偏差度，并根据SOH估算偏差度得到相应的SOH修正策略发送给SOH修正换电站端系统；Step 101: Obtain the battery pack data to obtain the SOH estimated deviation degree, and obtain the corresponding SOH correction strategy based on the SOH estimated deviation degree and send it to the SOH correction battery swap station end system;
步骤102，获取所述SOH修正换电站端系统发送相应的SOH修正策略所需数据估算得到相应修正后电池真实SOH数据。Step 102: Obtain the data required by the SOH correction battery swapping station system to send the corresponding SOH correction strategy and estimate the corresponding corrected battery real SOH data.
本发明依托云边协同方式与换电运行模式，当电池更换至换电站时，通过模型判断是否需要修正，实现电池包SOH换电站内强制修正，确保全生命周期内SOH精度；将SOH修正过程数据上传云端，训练SOH修正模型，缩短SOH算法开发周期和验证周期。 This invention relies on the cloud-edge collaboration method and battery swap operation mode. When the battery is replaced at the battery swap station, the model is used to determine whether correction is needed, and forced correction in the battery pack SOH battery swap station is achieved to ensure SOH accuracy throughout the life cycle; the SOH correction process is Data is uploaded to the cloud to train the SOH correction model, shortening the SOH algorithm development cycle and verification cycle.
实施例三Embodiment 3
图3是根据一示例性实施例示出的一种换电电池包SOH修正装置的结构示意框图，包括：Figure 3 is a schematic structural block diagram of an SOH correction device for a battery pack according to an exemplary embodiment, including:
SOH修正启动模块210，用于获取电池包数据得到SOH估算偏差度，并根据SOH估算偏差度得到相应的SOH修正策略发送给SOH修正换电站端系统；The SOH correction startup module 210 is used to obtain the battery pack data to obtain the SOH estimated deviation, and obtain the corresponding SOH correction strategy based on the SOH estimated deviation and send it to the SOH correction battery swap station end system;
SOH在线估算模块220，获取SOH修正换电站端系统发送相应的SOH修正策略所需数据估算得到相应修正后电池真实SOH数据。The SOH online estimation module 220 obtains the SOH correction data required for the corresponding SOH correction strategy sent by the battery swapping station end system and estimates the corresponding corrected battery real SOH data.
本发明依托云边协同方式与换电运行模式，当电池更换至换电站时，通过模型判断是否需要修正，实现电池包SOH换电站内强制修正，确保全生命周期内SOH精度；将SOH修正过程数据上传云端，训练SOH修正模型，缩短SOH算法开发周期和验证周期。This invention relies on the cloud-edge collaboration method and the battery swap operation mode. When the battery is replaced at the battery swap station, the model is used to determine whether correction is needed, and forced correction in the battery pack SOH battery swap station is achieved to ensure SOH accuracy throughout the life cycle; the SOH correction process is Data is uploaded to the cloud to train the SOH correction model, shortening the SOH algorithm development cycle and verification cycle.
实施例四Embodiment 4
图4是本申请实施例提供的一种终端的结构框图，该终端可以是上述实施例中的终端。该终端300可以是便携式移动终端，比如：智能手机、平板电脑。终端300还可能被称为用户设备、便携式终端等其他名称。Figure 4 is a structural block diagram of a terminal provided by an embodiment of the present application. The terminal may be the terminal in the above embodiment. The terminal 300 may be a portable mobile terminal, such as a smart phone or a tablet computer. The terminal 300 may also be called user equipment, portable terminal and other names.
通常，终端300包括有：处理器301和存储器302。Generally, the terminal 300 includes: a processor 301 and a memory 302.
处理器301可以包括一个或多个处理核心，比如4核心处理器、8核心处理器等。处理器301可以采用DSP(Digital Signal Processing，数字信号处理)、FPGA(Field－Programmable Gate Array，现场可编程门阵列)、PLA(Programmable Logic Array，可编程逻辑阵列)中的至少一种硬件形式来实现。处理器301也可以包括主处理器和协处理器，主处理器是用于对在唤醒状态下的数据进行处理的处理器，也称CPU(Central Processing Unit，中央处理器)；协处理器是用于对在待机状态下的数据进行处理的低功耗处理器。在一些实施例中，处理器301可以在集成有GPU(Graphics  Processing Unit，图像处理器)，GPU用于负责显示屏所需要显示的内容的渲染和绘制。一些实施例中，处理器301还可以包括AI(Artificial Intelligence，人工智能)处理器，该AI处理器用于处理有关机器学习的计算操作。The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 301 can adopt at least one hardware form among DSP (Digital Signal Processing, digital signal processing), FPGA (Field-Programmable Gate Array, field programmable gate array), and PLA (Programmable Logic Array, programmable logic array). accomplish. The processor 301 may also include a main processor and a co-processor. The main processor is a processor used to process data in the wake-up state, also called CPU (Central Processing Unit, central processing unit); the co-processor is A low-power processor used to process data in standby mode. In some embodiments, the processor 301 may be integrated with a GPU (Graphics Processing Unit (image processor), GPU is responsible for rendering and drawing the content that needs to be displayed on the display screen. In some embodiments, the processor 301 may also include an AI (Artificial Intelligence, artificial intelligence) processor, which is used to process computing operations related to machine learning.
存储器302可以包括一个或多个计算机可读存储介质，该计算机可读存储介质可以是有形的和非暂态的。存储器302还可包括高速随机存取存储器，以及非易失性存储器，比如一个或多个磁盘存储设备、闪存存储设备。在一些实施例中，存储器302中的非暂态的计算机可读存储介质用于存储至少一个指令，该至少一个指令用于被处理器301所执行以实现本申请中提供的一种换电电池包SOH修正方法。Memory 302 may include one or more computer-readable storage media, which may be tangible and non-transitory. Memory 302 may also include high-speed random access memory, and non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 302 is used to store at least one instruction, and the at least one instruction is used to be executed by the processor 301 to implement a battery replacement provided in this application. Includes SOH correction method.
在一些实施例中，终端300还可选包括有：外围设备接口303和至少一个外围设备。具体地，外围设备包括：射频电路304、触摸显示屏305、摄像头306、音频电路307、定位组件308和电源309中的至少一种。In some embodiments, the terminal 300 optionally further includes: a peripheral device interface 303 and at least one peripheral device. Specifically, the peripheral device includes: at least one of a radio frequency circuit 304, a touch display screen 305, a camera 306, an audio circuit 307, a positioning component 308 and a power supply 309.
外围设备接口303可被用于将I/O(Input/Output，输入/输出)相关的至少一个外围设备连接到处理器301和存储器302。在一些实施例中，处理器301、存储器302和外围设备接口303被集成在同一芯片或电路板上；在一些其他实施例中，处理器301、存储器302和外围设备接口303中的任意一个或两个可以在单独的芯片或电路板上实现，本实施例对此不加以限定。The peripheral device interface 303 may be used to connect at least one I/O (Input/Output) related peripheral device to the processor 301 and the memory 302 . In some embodiments, the processor 301, the memory 302 and the peripheral device interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one of the processor 301, the memory 302 and the peripheral device interface 303 or Both of them can be implemented on separate chips or circuit boards, which is not limited in this embodiment.
射频电路304用于接收和发射RF(Radio Frequency，射频)信号，也称电磁信号。射频电路304通过电磁信号与通信网络以及其他通信设备进行通信。射频电路304将电信号转换为电磁信号进行发送，或者，将接收到的电磁信号转换为电信号。可选地，射频电路304包括：天线系统、RF收发器、一个或多个放大器、调谐器、振荡器、数字信号处理器、编解码芯片组、用户身份模块卡等等。射频电路304可以通过至少一种无线通信 协议来与其它终端进行通信。该无线通信协议包括但不限于：万维网、城域网、内联网、各代移动通信网络(2G、3G、4G及5G)、无线局域网和/或WiFi(Wireless Fidelity，无线保真)网络。在一些实施例中，射频电路304还可以包括NFC(Near Field Communication，近距离无线通信)有关的电路，本申请对此不加以限定。The radio frequency circuit 304 is used to receive and transmit RF (Radio Frequency, radio frequency) signals, also called electromagnetic signals. Radio frequency circuit 304 communicates with communication networks and other communication devices through electromagnetic signals. The radio frequency circuit 304 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 304 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, and the like. Radio frequency circuitry 304 may communicate via at least one wireless protocol to communicate with other terminals. The wireless communication protocol includes but is not limited to: World Wide Web, metropolitan area network, intranet, mobile communication networks of all generations (2G, 3G, 4G and 5G), wireless local area network and/or WiFi (Wireless Fidelity, wireless fidelity) network. In some embodiments, the radio frequency circuit 304 may also include NFC (Near Field Communication) related circuits, which is not limited in this application.
触摸显示屏305用于显示UI(User Interface，用户界面)。该UI可以包括图形、文本、图标、视频及其它们的任意组合。触摸显示屏305还具有采集在触摸显示屏305的表面或表面上方的触摸信号的能力。该触摸信号可以作为控制信号输入至处理器301进行处理。触摸显示屏305用于提供虚拟按钮和/或虚拟键盘，也称软按钮和/或软键盘。在一些实施例中，触摸显示屏305可以为一个，设置终端300的前面板；在另一些实施例中，触摸显示屏305可以为至少两个，分别设置在终端300的不同表面或呈折叠设计；在再一些实施例中，触摸显示屏305可以是柔性显示屏，设置在终端300的弯曲表面上或折叠面上。甚至，触摸显示屏305还可以设置成非矩形的不规则图形，也即异形屏。触摸显示屏305可以采用LCD(Liquid Crystal Display，液晶显示器)、OLED(Organic Light-Emitting Diode,有机发光二极管)等材质制备。The touch display screen 305 is used to display UI (User Interface, user interface). The UI can include graphics, text, icons, videos, and any combination thereof. Touch display 305 also has the ability to collect touch signals on or above the surface of touch display 305 . The touch signal can be input to the processor 301 as a control signal for processing. The touch display screen 305 is used to provide virtual buttons and/or virtual keyboard, also called soft buttons and/or soft keyboard. In some embodiments, there may be one touch display screen 305, which is provided on the front panel of the terminal 300; in other embodiments, there may be at least two touch display screens 305, which are respectively provided on different surfaces of the terminal 300 or have a folding design. ; In still some embodiments, the touch display screen 305 may be a flexible display screen, disposed on the curved surface or folding surface of the terminal 300. Even, the touch display screen 305 can also be set in a non-rectangular irregular shape, that is, a special-shaped screen. The touch display screen 305 can be made of LCD (Liquid Crystal Display, liquid crystal display), OLED (Organic Light-Emitting Diode, organic light-emitting diode) and other materials.
摄像头组件306用于采集图像或视频。可选地，摄像头组件306包括前置摄像头和后置摄像头。通常，前置摄像头用于实现视频通话或自拍，后置摄像头用于实现照片或视频的拍摄。在一些实施例中，后置摄像头为至少两个，分别为主摄像头、景深摄像头、广角摄像头中的任意一种，以实现主摄像头和景深摄像头融合实现背景虚化功能，主摄像头和广角摄像头融合实现全景拍摄以及VR(Virtual Reality，虚拟现实)拍摄功能。在一些实施例中，摄像头组件306还可以包括闪光灯。闪光灯可以是单色温闪光灯，也可以是双色温闪光灯。双色温闪光灯是指暖光闪光灯和冷光闪光 灯的组合，可以用于不同色温下的光线补偿。The camera assembly 306 is used to capture images or videos. Optionally, the camera assembly 306 includes a front camera and a rear camera. Usually, the front camera is used for video calls or selfies, and the rear camera is used for taking photos or videos. In some embodiments, there are at least two rear cameras, one of which is a main camera, a depth camera, and a wide-angle camera, so as to realize the integration of the main camera and the depth-of-field camera to achieve the background blur function, and the integration of the main camera and the wide-angle camera. Realize panoramic shooting and VR (Virtual Reality, virtual reality) shooting functions. In some embodiments, camera assembly 306 may also include a flash. The flash can be a single color temperature flash or a dual color temperature flash. Dual color temperature flash refers to warm light flash and cold light flash The combination of lamps can be used for light compensation under different color temperatures.
音频电路307用于提供用户和终端300之间的音频接口。音频电路307可以包括麦克风和扬声器。麦克风用于采集用户及环境的声波，并将声波转换为电信号输入至处理器301进行处理，或者输入至射频电路304以实现语音通信。出于立体声采集或降噪的目的，麦克风可以为多个，分别设置在终端300的不同部位。麦克风还可以是阵列麦克风或全向采集型麦克风。扬声器则用于将来自处理器301或射频电路304的电信号转换为声波。扬声器可以是传统的薄膜扬声器，也可以是压电陶瓷扬声器。当扬声器是压电陶瓷扬声器时，不仅可以将电信号转换为人类可听见的声波，也可以将电信号转换为人类听不见的声波以进行测距等用途。在一些实施例中，音频电路307还可以包括耳机插孔。Audio circuit 307 is used to provide an audio interface between the user and terminal 300. Audio circuitry 307 may include a microphone and speakers. The microphone is used to collect sound waves from the user and the environment, and convert the sound waves into electrical signals that are input to the processor 301 for processing, or to the radio frequency circuit 304 to implement voice communication. For the purpose of stereo collection or noise reduction, there may be multiple microphones, which are respectively arranged at different parts of the terminal 300 . The microphone can also be an array microphone or an omnidirectional collection microphone. The speaker is used to convert electrical signals from the processor 301 or the radio frequency circuit 304 into sound waves. The loudspeaker can be a traditional membrane loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, it can not only convert electrical signals into sound waves that are audible to humans, but also convert electrical signals into sound waves that are inaudible to humans for purposes such as ranging. In some embodiments, audio circuitry 307 may also include a headphone jack.
定位组件308用于定位终端300的当前地理位置，以实现导航或LBS(Location Based Service，基于位置的服务)。定位组件308可以是基于美国的GPS(Global Positioning System，全球定位系统)、中国的北斗系统或俄罗斯的伽利略系统的定位组件。The positioning component 308 is used to locate the current geographical location of the terminal 300 to implement navigation or LBS (Location Based Service). The positioning component 308 may be a positioning component based on the American GPS (Global Positioning System), China's Beidou system, or Russia's Galileo system.
电源309用于为终端300中的各个组件进行供电。电源309可以是交流电、直流电、一次性电池或可充电电池。当电源309包括可充电电池时，该可充电电池可以是有线充电电池或无线充电电池。有线充电电池是通过有线线路充电的电池，无线充电电池是通过无线线圈充电的电池。该可充电电池还可以用于支持快充技术。The power supply 309 is used to provide power to various components in the terminal 300 . Power source 309 may be AC, DC, disposable batteries, or rechargeable batteries. When the power source 309 includes a rechargeable battery, the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. Wired rechargeable batteries are batteries that are charged through wired lines, and wireless rechargeable batteries are batteries that are charged through wireless coils. The rechargeable battery can also be used to support fast charging technology.
本领域技术人员可以理解，图4中示出的结构并不构成对终端300的限定，可以包括比图示更多或更少的组件，或者组合某些组件，或者采用不同的组件布置。Those skilled in the art can understand that the structure shown in FIG. 4 does not limit the terminal 300, and it may include more or fewer components than shown, or combine certain components, or adopt different component arrangements.
实施例五Embodiment 5
在示例性实施例中，还提供了一种计算机可读存储介质，其上存储有 计算机程序，该程序被处理器执行时实现如本申请所有发明实施例提供的一种换电电池包SOH修正方法。In an exemplary embodiment, a computer-readable storage medium is also provided, having stored thereon A computer program that, when executed by a processor, implements a battery pack SOH correction method as provided by all invention embodiments of this application.
可以采用一个或多个计算机可读的介质的任意组合。计算机可读介质可以是计算机可读信号介质或者计算机可读存储介质。计算机可读存储介质例如可以是——但不限于——电、磁、光、电磁、红外线、或半导体的系统、装置或器件，或者任意以上的组合。计算机可读存储介质的更具体的例子(非穷举的列表)包括：具有一个或多个导线的电连接、便携式计算机磁盘、硬盘、随机存取存储器(RAM)、只读存储器(ROM)、可擦式可编程只读存储器(EPROM或闪存)、光纤、便携式紧凑磁盘只读存储器(CD-ROM)、光存储器件、磁存储器件、或者上述的任意合适的组合。在本文件中，计算机可读存储介质可以是任何包含或存储程序的有形介质，该程序可以被指令执行系统、装置或者器件使用或者与其结合使用。Any combination of one or more computer-readable media may be employed. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any combination thereof. More specific examples (non-exhaustive list) of computer readable storage media include: electrical connections having one or more conductors, portable computer disks, hard drives, random access memory (RAM), read only memory (ROM), Erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above. As used herein, a computer-readable storage medium may be any tangible medium that contains or stores a program for use by or in connection with an instruction execution system, apparatus, or device.
计算机可读的信号介质可以包括在基带中或者作为载波一部分传播的数据信号，其中承载了计算机可读的程序代码。这种传播的数据信号可以采用多种形式，包括——但不限于——电磁信号、光信号或上述的任意合适的组合。计算机可读的信号介质还可以是计算机可读存储介质以外的任何计算机可读介质，该计算机可读介质可以发送、传播或者传输用于由指令执行系统、装置或者器件使用或者与其结合使用的程序。A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave carrying computer-readable program code therein. Such propagated data signals may take a variety of forms, including - but not limited to - electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device .
计算机可读介质上包含的程序代码可以用任何适当的介质传输，包括——但不限于——无线、电线、光缆、RF等等，或者上述的任意合适的组合。Program code embodied on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
可以以一种或多种程序设计语言或其组合来编写用于执行本发明操作的计算机程序代码，所述程序设计语言包括面向对象的程序设计语言—诸如Java、Smalltalk、C++，还包括常规的过程式程序设计语言—诸如“C”语言或类似的程序设计语言。程序代码可以完全地在用户计算机上执行、 部分地在用户计算机上执行、作为一个独立的软件包执行、部分在用户计算机上部分在远程计算机上执行、或者完全在远程计算机或服务器上执行。在涉及远程计算机的情形中，远程计算机可以通过任意种类的网络——包括局域网(LAN)或广域网(WAN)—连接到用户计算机，或者，可以连接到外部计算机(例如利用因特网服务提供商来通过因特网连接)。Computer program code for performing the operations of the present invention may be written in one or more programming languages, including object-oriented programming languages such as Java, Smalltalk, C++, and conventional Procedural programming language—such as "C" or a similar programming language. The program code can be fully executed on the user's computer, Execute partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In situations involving remote computers, the remote computer can be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (such as an Internet service provider through Internet connection).
实施例六Embodiment 6
在示例性实施例中，还提供了一种应用程序产品，包括一条或多条指令，该一条或多条指令可以由上述装置的处理器301执行，以完成上述一种换电电池包SOH修正方法。In an exemplary embodiment, an application product is also provided, including one or more instructions, which can be executed by the processor 301 of the above-mentioned device to complete the above-mentioned battery pack SOH correction. method.
尽管本发明的实施方案已公开如上，但其并不仅仅限于说明书和实施方式中所列运用。它完全可以被适用于各种适合本发明的领域。对于熟悉本领域的人员而言，可容易地实现另外的修改。因此在不背离权利要求及等同范围所限定的一般概念下，本发明并不限于特定的细节和这里示出与描述的图例。 Although embodiments of the present invention have been disclosed above, they are not limited to the uses set forth in the specification and description. It can be applied to various fields suitable for the present invention. Additional modifications can be readily implemented by those skilled in the art. Therefore, the invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept as defined by the claims and their equivalent scope.

Claims (10)

  1. 一种换电电池包SOH修正系统，其特征在于，包括：A battery pack SOH correction system, which is characterized by including:
    电池管理系统，用于获取电池包数据发送给SOH修正云端控制系统；The battery management system is used to obtain battery pack data and send it to the SOH correction cloud control system;
    SOH修正云端控制系统，用于获取所述电池管理系统发送的电池包数据得到SOH估算偏差度，并根据所述SOH估算偏差度得到相应的SOH修正策略发送给SOH修正换电站端系统；The SOH correction cloud control system is used to obtain the battery pack data sent by the battery management system to obtain the SOH estimated deviation, and obtain the corresponding SOH correction strategy based on the SOH estimated deviation and send it to the SOH correction battery swap station end system;
    SOH修正换电站端系统，用于获取并执行所述SOH修正云端控制系统发送的相应的SOH修正策略并生成相应的SOH修正策略所需数据发送给SOH修正云端控制系统；The SOH correction battery swap station system is used to obtain and execute the corresponding SOH correction strategy sent by the SOH correction cloud control system and generate the data required for the corresponding SOH correction strategy and send it to the SOH correction cloud control system;
    所述SOH修正云端控制系统还用于获取相应的SOH修正策略所需数据估算得到相应修正后电池真实SOH数据；The SOH correction cloud control system is also used to obtain the data required for the corresponding SOH correction strategy and estimate the corresponding corrected battery real SOH data;
    所述的电池管理系统还用于接收及存储SOH修正云端控制系统估算得到的电池SOH数据并将SOH用于后续电池控制策略。The battery management system is also used to receive and store the battery SOH data estimated by the SOH correction cloud control system and use the SOH for subsequent battery control strategies.
  2. 根据权利要求1所述的一种换电电池包SOH修正系统，其特征在于，所述SOH修正云端控制系统还用于将修正后电池真实SOH数据储存进行自学习训练；所述电池包数据至少包括：电池温度、工作电流、工作电压、当前单体容量和当前估算电池包SOH。A battery pack SOH correction system according to claim 1, characterized in that the SOH correction cloud control system is also used to store the corrected battery real SOH data for self-learning training; the battery pack data is at least Including: battery temperature, operating current, operating voltage, current cell capacity and current estimated battery pack SOH.
  3. 根据权利要求2所述的一种换电电池包SOH修正系统，其特征在于，所述获取所述电池管理系统发送的电池包数据得到SOH估算偏差度，包括：A battery pack SOH correction system according to claim 2, wherein said obtaining the battery pack data sent by the battery management system to obtain the SOH estimation deviation includes:
    通过对单体电芯全生命周期的温场情况统计分析得到电池包拟合容量；The fitted capacity of the battery pack is obtained through statistical analysis of the temperature field conditions of the single cell throughout its life cycle;
    通过所述电池包拟合容量与当前估算电池包SOH得到第一SOH估算偏差度影响因子；The first SOH estimation deviation influence factor is obtained through the battery pack fitting capacity and the current estimated battery pack SOH;
    根据所述第一SOH估算偏差度影响因子和云端SOH修正触发条件统计 数得到形成第一影响因子权重系数；According to the first SOH estimation deviation impact factor and cloud SOH correction trigger condition statistics The number is obtained to form the first influencing factor weight coefficient;
    通过第一SOH估算偏差度影响因子和第一影响因子权重系数得到电芯工作环境不均一引起电池真实容量非预期下降导致的SOH估算偏差度；The SOH estimation deviation caused by the unexpected decrease in the battery's true capacity caused by the uneven working environment of the battery cell is obtained through the first SOH estimation deviation influence factor and the first influence factor weight coefficient;
    对所述工作电流大于阈值的时间进行累计得到工作电流累计时间并判断是否大于工作电流累计时间阈值：Accumulate the time when the operating current is greater than the threshold to obtain the operating current accumulated time and determine whether it is greater than the operating current accumulated time threshold:
    是，则通过当前工作电流累计时间得到所述第二SOH估算偏差度影响因子；If yes, then the second SOH estimation deviation influence factor is obtained through the current operating current accumulation time;
    否，继续进行对所述工作电流大于阈值的时间进行累计；No, continue to accumulate the time when the operating current is greater than the threshold;
    根据所述第二SOH估算偏差度影响因子和云端SOH修正触发条件统计数得到形成第二影响因子权重系数；The second influence factor weight coefficient is obtained according to the second SOH estimation deviation influence factor and the cloud SOH correction trigger condition statistics;
    对所述工作电压在低电压区的时间进行累计得到工作电压累计时间并判断是否大于工作电压累计时间阈值：Accumulate the time the working voltage is in the low voltage zone to obtain the working voltage cumulative time and determine whether it is greater than the working voltage cumulative time threshold:
    是，则通过当前工作电压累计时间得到所述第三SOH估算偏差度影响因子；If yes, then the third SOH estimation deviation influence factor is obtained through the current working voltage accumulation time;
    否，继续对所述工作电压在低电压区的时间进行累计；No, continue to accumulate the time the working voltage is in the low voltage zone;
    根据所述第三SOH估算偏差度影响因子和云端SOH修正触发条件统计数得到形成第三影响因子权重系数；The third influence factor weight coefficient is formed based on the third SOH estimation deviation influence factor and the cloud SOH correction trigger condition statistics;
    根据所述第二SOH估算偏差度影响因子、第二影响因子权重系数、第三SOH估算偏差度影响因子和第三影响因子权重系数得到电池包使用工况剧烈引起估算SOH精度下降导致的SOH估算偏差度；According to the second SOH estimation deviation influence factor, the second influence factor weight coefficient, the third SOH estimation deviation influence factor and the third influence factor weight coefficient, the SOH estimation caused by the decrease in estimation SOH accuracy caused by severe battery pack usage conditions is obtained. degree of deviation;
    所述电池包使用工况剧烈引起估算SOH精度下降导致的SOH估算偏差度和电芯工作环境不均一引起电池真实容量非预期下降导致的SOH估算偏差度得到SOH估算偏差度。The SOH estimation deviation is obtained by the SOH estimation deviation caused by the decrease in the estimated SOH accuracy caused by the severe usage conditions of the battery pack and the SOH estimation deviation caused by the unexpected decrease in the battery's true capacity caused by uneven battery working environment.
  4. 根据权利要求3所述的一种换电电池包SOH修正系统，其特征在于，所述根据所述SOH估算偏差度得到相应的SOH修正策略，包括： A battery pack SOH correction system according to claim 3, characterized in that the corresponding SOH correction strategy is obtained based on the SOH estimation deviation, including:
    σ1<电池包SOH估算偏差度<σ2时，所述SOH修正策略为电池满充方式修正SOH；When σ1<battery pack SOH estimation deviation<σ2, the SOH correction strategy is to correct SOH by fully charging the battery;
    电池SOH估算偏差度>σ2时，所述SOH修正策略为电池内阻估算方式电池真实的SOH；When the battery SOH estimation deviation is >σ2, the SOH correction strategy is the battery’s true SOH using the battery internal resistance estimation method;
    电池SOH估算偏差度<σ1时，SOH不修正。When the battery SOH estimation deviation is <σ1, the SOH will not be corrected.
  5. 根据权利要求4所述的一种换电电池包SOH修正系统，其特征在于，所述获取并执行所述SOH修正云端控制系统发送的相应的SOH修正策略并生成相应的SOH修正策略所需数据，包括：A battery pack SOH correction system according to claim 4, characterized in that: obtaining and executing the corresponding SOH correction strategy sent by the SOH correction cloud control system and generating the data required for the corresponding SOH correction strategy ,include:
    所述SOH修正策略为电池满充方式修正SOH时，所述SOH修正策略所需数据为：充电电量变化过程时间和固定电流；When the SOH correction strategy is to correct SOH in the battery full charge mode, the data required by the SOH correction strategy are: charging power change process time and fixed current;
    所述SOH修正策略为电池内阻估算方式电池真实的SOH时，所述SOH修正策略所需数据为：电池内阻阻值。When the SOH correction strategy is the actual SOH of the battery using the battery internal resistance estimation method, the data required by the SOH correction strategy is: battery internal resistance value.
  6. 根据权利要求5所述的一种换电电池包SOH修正系统，其特征在于，所述获取相应的SOH修正策略所需数据估算得到相应修正后电池真实SOH数据，包括：A battery pack SOH correction system according to claim 5, characterized in that the data required for obtaining the corresponding SOH correction strategy is estimated to obtain the corresponding corrected battery real SOH data, including:
    所述SOH修正策略为电池满充方式修正SOH时，通过公式(1)得到电池满充方式修正后电池真实SOH数据：
    When the SOH correction strategy is to correct the SOH in the battery full charge mode, the true SOH data of the battery after the battery full charge mode is corrected is obtained through formula (1):
    其中：SOH1为电池满充方式修正后电池真实SOH数据，I为固定电流，Q为初始电池容量；Among them: SOH 1 is the true SOH data of the battery after correction in the battery full charge mode, I is the fixed current, and Q is the initial battery capacity;
    所述SOH修正策略为电池内阻估算方式电池真实的SOH时：The SOH correction strategy is the battery internal resistance estimation method when the battery's true SOH is:
    通过公式(2)得到归一化电池电阻数据：
    R0＝β1×R1+β2×R2+…+βn×Rn   (2)    The normalized battery resistance data is obtained through formula (2):
    R 0 =β 1 ×R 1 +β 2 ×R 2 +…+β n ×R n (2)
    其中，R0为归一化电池电阻数据，β为电阻系数，通过内阻相关的数据库与相应电阻阻值得到，R为电阻阻值，n为高、中、低不同电量阶段内 设置的电阻数量，n≥3；Among them, R 0 is the normalized battery resistance data, β is the resistance coefficient, which is obtained through the database related to internal resistance and the corresponding resistance value, R is the resistance value of the resistor, and n is the period of high, medium and low power levels. The number of resistors to set, n≥3;
    根据所述归一化电池电阻与内阻相关的数据库得到电池满充方式修正后电池真实SOH数据。According to the database related to the normalized battery resistance and internal resistance, the real SOH data of the battery after the battery full charging mode is corrected is obtained.
  7. 一种换电电池包SOH修正方法，其特征在于，应用于权利要求1-6中任一项所述的换电电池包SOH修正系统，包括：An SOH correction method for a battery pack, characterized in that it is applied to the SOH correction system of a battery pack according to any one of claims 1 to 6, including:
    获取所述电池包数据得到SOH估算偏差度，并根据所述SOH估算偏差度得到相应的SOH修正策略发送给SOH修正换电站端系统；Obtain the battery pack data to obtain the SOH estimation deviation, and obtain the corresponding SOH correction strategy based on the SOH estimation deviation and send it to the SOH correction battery swap station end system;
    获取所述SOH修正换电站端系统发送相应的SOH修正策略所需数据估算得到相应修正后电池真实SOH数据。Obtain the data required by the SOH correction battery swapping station system to send the corresponding SOH correction strategy and estimate the corresponding corrected battery real SOH data.
  8. 一种换电电池包SOH修正装置，其特征在于，包括：An SOH correction device for a battery pack, which is characterized by including:
    SOH修正启动模块，用于获取所述电池包数据得到SOH估算偏差度，并根据所述SOH估算偏差度得到相应的SOH修正策略发送给SOH修正换电站端系统；The SOH correction startup module is used to obtain the battery pack data to obtain the SOH estimated deviation, and obtain the corresponding SOH correction strategy based on the SOH estimated deviation and send it to the SOH correction battery swap station end system;
    SOH在线估算模块，获取所述SOH修正换电站端系统发送相应的SOH修正策略所需数据估算得到相应修正后电池真实SOH数据。The SOH online estimation module obtains the data required by the SOH correction battery swapping station system to send the corresponding SOH correction strategy and estimates the corresponding corrected battery real SOH data.
  9. 一种终端，其特征在于，包括：A terminal, characterized by including:
    一个或多个处理器；one or more processors;
    用于存储所述一个或多个处理器可执行指令的存储器；memory for storing instructions executable by the one or more processors;
    其中，所述一个或多个处理器被配置为：Wherein, the one or more processors are configured to:
    执行如权利要求7所述的一种换电电池包SOH修正方法。A method for correcting the SOH of a battery pack according to claim 7 is performed.
  10. 一种非临时性计算机可读存储介质，其特征在于，当所述存储介质中的指令由终端的处理器执行时，使得终端能够执行如权利要求7所述的一种换电电池包SOH修正方法。 A non-transitory computer-readable storage medium, characterized in that when the instructions in the storage medium are executed by the processor of the terminal, the terminal can perform a battery pack SOH correction as claimed in claim 7 method.
PCT/CN2023/097719 2022-08-25 2023-06-01 Soh correction system, method and apparatus for swapping battery pack, and terminal and medium WO2024041074A1 (en)

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