Solid-state battery management method and device, electronic equipment and storage medium

Abstract

The application provides a solid-state battery management method and device, electronic equipment and storage medium, and relates to the technical field of solid-state batteries. The solid-state battery management method comprises the following steps: acquiring interface pressure information and state information in the running process of a solid-state battery; performing fault diagnosis on the solid-state battery based on the interface pressure information and the state information; and if it is determined that the solid-state battery has a target type fault, calling a corresponding control strategy to manage the solid-state battery. The application can realize the cooperation of solid-state battery pressure management and state monitoring, thereby improving the accuracy of solid-state battery fault diagnosis, and facilitating accurate prevention or elimination of solid-state battery faults.

Description

Technical Field

[0001] This invention relates to the field of solid-state battery technology, and in particular to a solid-state battery management method, apparatus, electronic device, and storage medium. Background Technology

[0002] Solid-state batteries, with their high energy density and good safety, are gradually becoming an important development direction for next-generation energy storage technology. Solid-state batteries have a solid-solid interface. To ensure the stability of the ion conduction interface during long-term cycling, an optimal and uniform static pressure must be applied to the cells at the battery module and system levels. Meanwhile, the dynamic expansion and contraction of the cells during charging and discharging significantly alter this static pressure, directly affecting interface impedance and battery life.

[0003] However, in existing technologies, solid-state battery pressure management solutions often only perform "open-loop" control based on preset pressure values ​​or mechanical deformation, and cannot perform "closed-loop" adaptive pressure regulation based on the real-time internal state of the solid-state battery (such as temperature, internal resistance, etc.). Furthermore, the BMS (Battery Management System) cannot accurately assess the impact of pressure changes on the battery's health status due to the lack of high-precision in-situ pressure data of the solid-state battery. In other words, solid-state battery pressure management and status monitoring are disconnected, which leads to poor accuracy in solid-state battery fault diagnosis, making it very difficult to accurately prevent or eliminate solid-state battery faults. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a solid-state battery management method, apparatus, electronic device and storage medium to alleviate the above-mentioned problems existing in the related art.

[0005] In a first aspect, embodiments of the present invention provide a solid-state battery management method, comprising: acquiring interface pressure information and status information during the operation of the solid-state battery; performing fault diagnosis on the solid-state battery based on the interface pressure information and the status information; and, if it is determined that the solid-state battery has a target type fault, invoking a corresponding control strategy to manage the solid-state battery.

[0006] Secondly, embodiments of the present invention also provide a solid-state battery management device, comprising: an acquisition module for acquiring interface pressure information and status information during the operation of the solid-state battery; a diagnosis module for performing fault diagnosis on the solid-state battery based on the interface pressure information and the status information; and a management module for managing the solid-state battery by invoking a corresponding control strategy if it is determined that the solid-state battery has experienced a target type fault.

[0007] Thirdly, embodiments of the present invention also provide an electronic device, including a processor and a memory, wherein the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the solid-state battery management method described in the first aspect above.

[0008] Fourthly, embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions, which, when invoked and executed by a processor, cause the processor to implement the solid-state battery management method described in the first aspect.

[0009] This invention provides a solid-state battery management method, apparatus, electronic device, and storage medium. First, it acquires interface pressure information and status information during the solid-state battery's operation. Then, based on this information, it performs fault diagnosis on the solid-state battery. If a target type of fault is determined, it invokes the corresponding control strategy to manage the battery. By employing this technology, fault diagnosis can be performed by combining the solid-state battery's interface pressure and status information, and the corresponding control strategy can be invoked to manage the solid-state battery when a fault occurs. This enables synergy between solid-state battery pressure management and status monitoring, thereby improving the accuracy of solid-state battery fault diagnosis and facilitating precise prevention or elimination of solid-state battery faults.

[0010] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0011] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a flowchart illustrating a solid-state battery management method according to an embodiment of the present invention; Figure 2 This is an architecture diagram of the solid-state battery management system in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a solid-state battery management device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Currently, existing solid-state battery pressure management solutions often only perform "open-loop" control based on preset pressure values ​​or mechanical deformation, and cannot perform "closed-loop" adaptive pressure regulation based on the real-time internal state of the solid-state battery (such as temperature, internal resistance, etc.). Furthermore, the BMS lacks high-precision in-situ pressure data of the solid-state battery, making it impossible to accurately assess the impact of pressure changes on the battery's health status. In other words, solid-state battery pressure management and status monitoring are disconnected, which leads to poor accuracy in solid-state battery fault diagnosis, making it very difficult to accurately prevent or eliminate solid-state battery faults.

[0016] Based on this, the present invention provides a solid-state battery management method, apparatus, electronic device, and storage medium that can alleviate the above-mentioned problems existing in related technologies.

[0017] To facilitate understanding of this embodiment, a solid-state battery management method disclosed in this invention will first be described in detail, see [link to relevant documentation]. Figure 1 As shown, the method may include the following steps: Step S102: Obtain interface pressure information and status information during the operation of the solid-state battery.

[0018] Step S104: Based on interface pressure information and status information, perform fault diagnosis on the solid-state battery.

[0019] Step S106: If it is determined that the solid-state battery has a target type of fault, the corresponding control strategy is invoked to manage the solid-state battery.

[0020] This invention provides a solid-state battery management method. First, it acquires interface pressure information and status information during the solid-state battery's operation. Then, based on this information, it performs fault diagnosis on the solid-state battery. If a target type of fault is determined, it invokes the corresponding control strategy to manage the battery. By employing this technology, fault diagnosis can be performed by combining the interface pressure information and status information of the solid-state battery. Furthermore, by invoking the corresponding control strategy to manage the solid-state battery when a fault occurs, it achieves synergy between solid-state battery pressure management and status monitoring, thereby improving the accuracy of solid-state battery fault diagnosis and facilitating precise prevention or elimination of solid-state battery faults.

[0021] As one possible implementation, the status information may include internal resistance information and temperature information; based on this, the above step S104 (i.e., performing fault diagnosis on the solid-state battery based on interface pressure information and status information) may include: performing fault diagnosis on the solid-state battery based on interface pressure information, internal resistance information and temperature information.

[0022] As one possible implementation, step S102 (i.e., obtaining interface pressure information and state information during the operation of the solid-state battery) may include: measuring the measured pressure on the electrode surface of each cell through a pressure detection unit to obtain interface pressure information; measuring the measured impedance spectrum of each cell through an internal resistance detection unit to obtain internal resistance information; and measuring the measured temperature of each cell through a temperature detection unit to obtain temperature information; wherein at least two of the pressure detection unit, internal resistance detection unit, and temperature detection unit may be integrated on a flexible circuit board.

[0023] In practical applications, a solid-state battery management system can be designed, including a solid-state battery module, a sensor cluster, and a main control unit. The sensor cluster can include a pressure detection unit, a temperature detection unit, and an internal resistance detection unit. The internal resistance detection unit is used for measurement using electrochemical impedance spectroscopy (EIS) technology. All detection units of the sensor cluster are connected to the main control unit via a high-speed bus.

[0024] The pressure detection unit employs a miniaturized, high-temperature-resistant MEMS piezoresistive pressure sensor array, which is directly attached or embedded between solid-state battery cells via a pre-tightening structure. It measures the normal pressure at the contact surfaces between cells within the solid-state battery module. The pressure data obtained from the pressure detection unit can be used to calculate the uniformity of pressure distribution. The temperature detection unit employs a miniaturized, high-temperature-resistant temperature sensor array, positioned on the surface of each cell within the solid-state module, to measure the temperature of each cell. The internal resistance detection unit injects a specific frequency, low-amplitude AC signal into the solid-state battery module when it is stationary or operating at low current, measuring the impedance spectrum of the solid-state battery. The interfacial contact resistance value in the impedance spectrum measured by the internal resistance detection unit is strongly correlated with the pressure data.

[0025] In practical applications, the sensor cluster can adopt an integrated sensor module, which integrates pressure sensors, temperature sensors, internal resistance detection units, etc. on a compact flexible circuit board to form a multi-parameter sensor patch that can be directly stacked on the surface of the battery cell, maximizing space saving and ensuring measurement position consistency.

[0026] Furthermore, the following anti-interference signal link can be established between the integrated sensing module and the main control unit: the pressure analog signal, temperature analog signal and EIS analog signal of the integrated sensing module are locally converted into digital signals by a dedicated chip at the sensing patch end and transmitted to the main control unit in digital signal form through a differential bus, which greatly reduces electromagnetic interference during the transmission process.

[0027] As one possible implementation, the above-described steps for fault diagnosis of solid-state batteries based on interface pressure information, internal resistance information, and temperature information may include steps A1 to A2: Step A1: Based on the internal resistance information and temperature information, determine whether the internal resistance of the solid-state battery is abnormal.

[0028] For example, the internal resistance information may include the measured impedance spectrum of each cell, and the temperature information may include the measured temperature of each cell; the above step A1 (i.e., determining whether the internal resistance of the solid-state battery is abnormal based on the internal resistance information and temperature information) may include: for each cell, extracting the measured impedance value within a preset frequency range from the measured impedance spectrum of the cell, and determining whether the measured impedance value corresponding to the cell is within the preset impedance range corresponding to the measured temperature of the cell; if the measured impedance value corresponding to at least one first target cell is not within its corresponding preset impedance range, then the internal resistance of the solid-state battery is determined to be abnormal; if the measured impedance value corresponding to each cell is within its corresponding preset impedance range, then the internal resistance of the solid-state battery is determined to be normal.

[0029] Step A2: If it is determined that the internal resistance of the solid-state battery is abnormal, then based on the interface pressure information and temperature information, determine whether the solid-state battery has experienced a target type of fault.

[0030] For example, the interface pressure information may include the measured pressure on the electrode surface of each cell; based on this, the determination of whether the solid-state battery has experienced a target type fault based on the interface pressure information and temperature information in step A2 above may include: for each cell, determining whether the measured pressure on the electrode surface of the cell is less than the preset pressure corresponding to the measured temperature of the cell; if the measured pressure on the electrode surface of at least one first target cell is less than its corresponding preset pressure, then it is determined that the solid-state battery has experienced a first target type fault caused by mechanical stress relaxation; if the measured pressure on the electrode surface of each first target cell is not less than its corresponding preset pressure, then it is determined that the solid-state battery has experienced a second target type fault caused by electrochemical side reactions.

[0031] As one possible implementation, the above solid-state battery management method may further include: sending interface pressure information and status information to the main control unit so that the main control unit performs the above step S104 (i.e., performing fault diagnosis on the solid-state battery based on the interface pressure information and status information); wherein, the main control unit may be a vehicle domain controller or a BMS controller.

[0032] As one possible implementation, step S106 (i.e., if a target type fault is determined to occur in the solid-state battery, the corresponding control strategy is invoked to manage the solid-state battery) may include: if a first target type fault is determined to occur in the solid-state battery, the first control strategy corresponding to the first target type fault is invoked to manage the solid-state battery, so as to adjust the pressure applied to the solid-state battery by the external active pressure control mechanism corresponding to the solid-state battery; if a second target type fault is determined to occur in the solid-state battery, the second control strategy corresponding to the second target type fault is invoked to manage the solid-state battery, so as to adjust the charging current of the solid-state battery.

[0033] Continuing from the previous example, the integrated sensing module monitors real-time data of different parameters of the solid-state battery module. The main control unit collects data from all sensors at a frequency of 10-100 times per second and monitors whether the pressure of each cell is within a preset safety window (i.e., a preset pressure range) based on the pressure data measured by the pressure detection unit. Every certain period of time, the main control unit initiates an EIS scan (i.e., controls the internal resistance detection unit to perform measurement), applies an AC excitation of 0.1Hz to 10kHz to each individual cell, measures its impedance spectrum, and focuses on extracting the impedance value in the low-frequency region (0.01Hz~1Hz) (for diffusion behavior analysis), while simultaneously extracting the semi-circular diameter in the mid-frequency region (1kHz~1Hz) as the interface resistance. When an abnormal increase in the interface resistance of a cell is detected (i.e., the interface resistance value exceeds the corresponding interface resistance threshold at the corresponding temperature), the main control unit does not immediately trigger an alarm, but first retrieves the real-time pressure data corresponding to that cell. If the real-time pressure data also decreases significantly at the same time, If the real-time pressure drop rate exceeds a corresponding threshold and the real-time pressure value drops below the corresponding pressure threshold at the corresponding temperature, the main control unit determines that the solid-state battery module is experiencing interface contact degradation due to mechanical stress relaxation (i.e., "mechanical contact failure"). It then sends a "request to increase pressure" command to the controller of the battery pack (i.e., the solid-state battery module) via the communication interface. This requests the corresponding external active pressure control mechanism to apply an incremental pressure to the battery pack until all cell interface resistances return to normal. If the pressure is normal or too high (i.e., the real-time pressure varies within a preset range and the real-time pressure value is not less than the corresponding pressure threshold at the corresponding temperature), the main control unit determines that the solid-state battery module is experiencing an electrochemical interface side reaction. It then sends a "request to adjust charging current" command to the controller of the battery pack via the communication interface. This requests the charging current regulation module of the battery pack to adjust the charging current until all cell interface resistances return to normal.

[0034] As one possible implementation, the above solid-state battery management method may further include: detecting harmful gases inside the solid-state battery through a harmful gas detection unit; if the harmful gas detection unit detects a target harmful gas, then when the current pressure and current temperature of the target area inside the solid-state battery corresponding to the target harmful gas meet the preset warning triggering conditions, triggering a warning and calling a third control strategy to manage the solid-state battery to adjust the pressure and temperature of the target area.

[0035] Continuing the previous example, the sensor cluster can also include a hazardous gas detection unit, installed in the gas gathering area of ​​the battery pack (this area is actually dynamically changing, such as the top of the battery pack, corners and narrow gaps inside the pack, narrow gaps between cells, near the wall between cells, outside the exhaust port, and the bottom area of ​​the battery pack, etc.). The hazardous gas detection unit is connected to the main control unit via a high-speed bus. If the hazardous gas detection unit detects trace amounts of sulfides, hydrides, or other partial solid electrolyte decomposition products, and at the same time the temperature in the relevant area is abnormal (i.e., the temperature exceeds the preset temperature range) or the pressure rises sharply (i.e., the pressure rise rate is greater than the corresponding threshold and the pressure rises to a level greater than the corresponding pressure threshold at the corresponding temperature), then regardless of the EIS data, the main control unit immediately triggers a thermal runaway warning and initiates the corresponding program for emergency cooling and depressurization.

[0036] As one possible implementation, the steps for fault diagnosis of solid-state batteries based on interface pressure information, internal resistance information, and temperature information may include: using a preset fault diagnosis model to diagnose faults in solid-state batteries based on interface pressure information, internal resistance information, and temperature information.

[0037] For example, the preset fault diagnosis model may include a pre-established correspondence between pressure, impedance, and temperature. Based on this, the preset fault diagnosis model can be used to determine whether the measured impedance value of each cell satisfies the corresponding measured temperature and measured pressure. If the measured impedance value of at least one second target cell does not satisfy the corresponding measured temperature and measured pressure, the preset fault diagnosis model determines that the solid-state battery has experienced a target type fault. If the measured impedance value of each cell satisfies the corresponding measured temperature and measured pressure, the preset fault diagnosis model determines that the solid-state battery has not experienced a target type fault.

[0038] Continuing from the previous example, the main control unit uses a built-in fault diagnosis model to compare the measured interface resistance with historical data and the currently measured pressure and temperature values ​​of the corresponding cell to determine whether the interface resistance, pressure, and temperature values ​​meet the preset corresponding relationship. If it is found that the interface resistance increases by more than 10% at the corresponding temperature value and the pressure value decreases by more than 5% at the corresponding temperature value, that is, the interface resistance, pressure, and temperature values ​​do not meet the preset corresponding relationship, then it is determined as "mechanical contact failure".

[0039] For ease of understanding, the implementation process of the above solid-state battery management method is described below using a specific application as an example.

[0040] The core idea of ​​the above solid-state battery management method is to use the pressure data measured by the high-precision in-situ pressure detection unit as the key input, the EIS measured by the internal resistance detection unit as the core data for analysis, integrate multi-dimensional sensor data, and realize the real-time evaluation of the interface contact state of the solid-state battery and the dynamic prediction of pressure demand through the intelligent algorithm of the main control unit, and provide optimization instructions for the active pressure control mechanism.

[0041] A solid-state battery management system can be designed to implement the above solid-state battery management method. See [link to relevant documentation]. Figure 2 As shown, the overall architecture of the solid-state battery management system is as follows: It mainly consists of a solid-state battery module, a sensor cluster, and a main control unit. The sensor cluster includes a pressure detection unit, a hazardous gas detection unit, a temperature detection unit, a single-cell voltage / current detection unit, and an internal resistance detection unit (for measuring EIS). Data from all detection units is aggregated to the main control unit via a high-speed bus. The main control unit has a built-in intelligent algorithm to build a three-dimensional database model of "pressure-interface resistance-temperature," and based on this model, it performs solid-state battery interface contact state assessment and pressure demand prediction.

[0042] The hardware design of the solid-state battery management system mainly includes: the sensor cluster adopts an integrated sensor module, and an anti-interference signal link is established between the integrated sensor module and the main control unit; the main control unit adopts a multi-core processor, one core is dedicated to running high-frequency data acquisition and preprocessing (mainly for data such as pressure, temperature, resistance, voltage, and current), and the other core runs a complex EIS analysis algorithm (used to analyze the measured EIS to calculate the interface resistance) and a health status fusion diagnostic model (used to comprehensively analyze data such as interface resistance, pressure, and temperature to determine the health status of the battery pack).

[0043] The process of building a solid-state battery management system is as follows: Flexible sensing patches integrating MEMS pressure and temperature sensors are pre-placed between the electrode surfaces of each cell during the solid-state battery module assembly process; the flexible sensing patches are connected to the data acquisition sub-board located on the side of the solid-state battery module via flexible ribbon cables. The data acquisition sub-board is mounted on a flexible circuit board and is responsible for collecting raw analog pressure signals and raw analog temperature signals from multiple flexible sensor patches, and performing AD conversion through a dedicated chip. The data acquisition sub-board communicates with the main control unit in the vehicle domain controller or independent BMS main control box via a CAN bus. Individual cell voltage detection is achieved through existing sampling lines; the EIS excitation and detection circuit is integrated on the main control board and connected to different battery cells through relay switching channels; the main control board and the data acquisition sub-board together form the main control unit.

[0044] The workflow of a solid-state battery management system is as follows: (1) Real-time monitoring stage: The main control unit collects data from all sensors at a frequency of 10-100 times per second and monitors in real time whether the pressure of each cell is within the preset safety window.

[0045] (2) Periodic diagnostic stage: Every certain period of time, the main control unit starts an EIS scan, applies AC excitation from 0.1Hz to 10kHz to each cell, measures its impedance spectrum, focuses on extracting the impedance value in the low frequency region, and extracts the semi-circular arc diameter in the mid frequency region as the interface resistance.

[0046] (3) Data fusion and decision-making: The fusion diagnosis algorithm (i.e., the health status fusion diagnosis model) in the main control unit compares the interface resistance R_interface obtained by measuring EIS with historical data and the current pressure value P_current and temperature value T of the corresponding single cell. If it is found that R_interface increases by more than 10% and P_current decreases by more than 5%, the algorithm determines that "mechanical contact failure" occurs. The main control unit will send a command to the battery pack controller through the communication interface to request the external active pressure control mechanism corresponding to the battery pack to apply an incremental pressure ΔP until R_interface returns to the normal range.

[0047] (4) Safety warning: If the hazardous gas detection unit detects trace amounts of some solid electrolyte decomposition products such as sulfides and hydrides, and the temperature and pressure in the relevant area are abnormal and rise sharply, the system will immediately trigger the highest level thermal runaway warning regardless of the EIS data, and start the corresponding procedures for emergency cooling and depressurization; the runaway warning level is determined based on the pressure detection results, temperature detection results, single cell information, internal resistance information, and hazardous gas concentration.

[0048] The beneficial effects of the above-mentioned solid-state battery management method are mainly reflected in the following aspects: 1. Dynamic monitoring: It realizes the leap from "static pressure maintenance" to "dynamic pressure demand prediction", and can perform forward-looking fault diagnosis and management of solid-state batteries based on the real-time status of solid-state batteries (especially temperature, EIS characteristics) and interface pressure.

[0049] 2. High precision: Through local digitization and sensor arraying, it is easy to draw the pressure distribution map of the cell interface. It also combines EIS to realize direct measurement of the interface state of solid-state battery, which can significantly improve the accuracy of solid-state battery health status assessment.

[0050] 3. Strong anti-interference: The digital transmission architecture and dedicated sensor patch design enable the system to maintain signal stability and extremely low false alarm rate even under the harsh operating conditions of electric vehicles.

[0051] 4. Economic efficiency: The highly integrated design reduces the use of wiring harnesses and connectors, and the unified hardware platform reduces the overall material cost and assembly complexity of the system through software-defined functions.

[0052] Based on the above-described solid-state battery management method, this invention also provides a solid-state battery management device, see [link to relevant documentation]. Figure 3 As shown, the device may include the following modules: The acquisition module 302 is used to acquire interface pressure information and status information during the operation of the solid-state battery; The diagnostic module 304 is used to perform fault diagnosis on the solid-state battery based on the interface pressure information and the status information. The management module 306 is used to manage the solid-state battery by invoking the corresponding control strategy if it is determined that the solid-state battery has a target type of fault.

[0053] By using the above-mentioned solid-state battery management device, fault diagnosis can be performed by combining the interface pressure information and status information of the solid-state battery. When a fault occurs in the solid-state battery, the corresponding control strategy can be invoked to manage the solid-state battery. This enables the synergy between solid-state battery pressure management and status monitoring, thereby improving the accuracy of solid-state battery fault diagnosis and facilitating the precise prevention or elimination of solid-state battery faults.

[0054] The solid-state battery management device provided in this embodiment of the invention has the same implementation principle and technical effects as the aforementioned method embodiment. For the sake of brevity, any parts not mentioned in the device embodiment can be referred to the corresponding content in the aforementioned method embodiment.

[0055] This invention also provides an electronic device, such as... Figure 4 The diagram shows the structure of the electronic device, which includes a processor 41 and a memory 40. The memory 40 stores computer-executable instructions that can be executed by the processor 41. The processor 41 executes the computer-executable instructions to implement the above-mentioned solid-state battery management method.

[0056] exist Figure 4 In the illustrated embodiment, the electronic device further includes a bus 42 and a communication interface 43, wherein the processor 41, the communication interface 43, and the memory 40 are connected via the bus 42.

[0057] The memory 40 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 43 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc. The bus 42 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. The bus 42 can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0058] Processor 41 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above-described solid-state battery management method can be completed by the integrated logic circuits in the hardware of processor 41 or by instructions in software form. Processor 41 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the solid-state battery management method disclosed in the embodiments of this invention can be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in the memory, and the processor 41 reads the information in the memory and, in conjunction with its hardware, completes the steps of the solid-state battery management method of the aforementioned embodiment.

[0059] This invention also provides a computer-readable storage medium storing computer-executable instructions. When these computer-executable instructions are called and executed by a processor, they cause the processor to implement the aforementioned solid-state battery management method. For specific implementation details, please refer to the foregoing method embodiments, which will not be repeated here.

[0060] The computer program product of the solid-state battery management method, apparatus and electronic device provided in the embodiments of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the solid-state battery management method described in the preceding method embodiments. For specific implementation, please refer to the method embodiments, which will not be repeated here.

[0061] Unless otherwise specifically stated, the relative steps, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention.

[0062] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0063] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0064] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A solid-state battery management method, characterized in that, include: Acquire interface pressure and status information during the operation of solid-state batteries; Based on the interface pressure information and the status information, fault diagnosis is performed on the solid-state battery; If a target type of fault is determined to have occurred in the solid-state battery, the corresponding control strategy is invoked to manage the solid-state battery.

2. The solid-state battery management method according to claim 1, characterized in that, The status information includes internal resistance information and temperature information; based on the interface pressure information and the status information, fault diagnosis of the solid-state battery is performed, including: Based on the interface pressure information, the internal resistance information, and the temperature information, fault diagnosis is performed on the solid-state battery.

3. The solid-state battery management method according to claim 2, characterized in that, Based on the interface pressure information, the internal resistance information, and the temperature information, fault diagnosis of the solid-state battery is performed, including: Based on the internal resistance information and the temperature information, determine whether the internal resistance of the solid-state battery is abnormal; If the internal resistance of the solid-state battery is determined to be abnormal, then based on the interface pressure information and the temperature information, it is determined whether the solid-state battery has experienced the target type of fault.

4. The solid-state battery management method according to claim 3, characterized in that, The internal resistance information includes the measured impedance spectrum of each cell, and the temperature information includes the measured temperature of each cell; based on the internal resistance information and the temperature information, determining whether the internal resistance of the solid-state battery is abnormal includes: For each cell, the measured impedance value within a preset frequency range is extracted from the measured impedance spectrum of the cell, and it is determined whether the measured impedance value of the cell is within the preset impedance range corresponding to the measured temperature of the cell. If the measured impedance value corresponding to at least one first target cell is not within its corresponding preset impedance range, then the internal resistance of the solid-state battery is determined to be abnormal. If the measured impedance value of each cell is within its corresponding preset impedance range, then the internal resistance of the solid-state battery is determined to be normal.

5. The solid-state battery management method according to claim 4, characterized in that, The interface pressure information includes the measured pressure on the electrode surfaces of each cell; based on the interface pressure information and the temperature information, determining whether the solid-state battery has experienced the target type of fault includes: For each cell, determine whether the measured pressure on the electrode surface of the cell is less than the preset pressure corresponding to the measured temperature of the cell; If the measured pressure on the electrode surface of at least one first target cell is less than its corresponding preset pressure, then the solid-state battery is determined to have suffered a first target type failure due to mechanical stress relaxation. If the measured pressure on the electrode surface of each first target cell is not less than its corresponding preset pressure, then the second target type failure caused by the electrochemical side reaction of the solid-state battery is determined.

6. The solid-state battery management method according to claim 2, characterized in that, Acquire interface pressure and status information during solid-state battery operation, including: The interface pressure information is obtained by measuring the actual pressure on the electrode surface of each cell through the pressure detection unit. The internal resistance information is obtained by measuring the measured impedance spectrum of each cell using an internal resistance detection unit. The temperature information is obtained by measuring the actual temperature of each cell using a temperature detection unit. At least two of the pressure detection unit, the internal resistance detection unit, and the temperature detection unit are integrated on a flexible circuit board.

7. The solid-state battery management method according to claim 1, characterized in that, Also includes: The interface pressure information and the status information are sent to the main control unit so that the main control unit can perform a fault diagnosis of the solid-state battery based on the interface pressure information and the status information; wherein, the main control unit is a vehicle domain controller or a BMS controller.

8. The solid-state battery management method according to claim 5, characterized in that, If a target type of fault is determined to have occurred in the solid-state battery, the corresponding control strategy is invoked to manage the solid-state battery, including: If it is determined that the solid-state battery has the first target type of fault, the first control strategy corresponding to the first target type of fault is invoked to manage the solid-state battery, so as to adjust the pressure applied to the solid-state battery by the external active pressure control mechanism corresponding to the solid-state battery. If it is determined that the solid-state battery has experienced the second target type of fault, the second control strategy corresponding to the second target type of fault is invoked to manage the solid-state battery and adjust the charging current of the solid-state battery.

9. The solid-state battery management method according to claim 1, characterized in that, Also includes: Harmful gases inside the solid-state battery are detected by a harmful gas detection unit; If the harmful gas detection unit detects a target harmful gas, it will trigger an early warning when the current pressure and temperature of the target area inside the solid-state battery corresponding to the target harmful gas meet the preset early warning triggering conditions, and invoke a third control strategy to manage the solid-state battery to adjust the pressure and temperature of the target area.

10. The solid-state battery management method according to claim 5, characterized in that, Based on the interface pressure information, the internal resistance information, and the temperature information, fault diagnosis of the solid-state battery is performed, including: Based on the interface pressure information, the internal resistance information, and the temperature information, a preset fault diagnosis model is used to diagnose the faults in the solid-state battery.

11. The solid-state battery management method according to claim 10, characterized in that, The preset fault diagnosis model includes a pre-established correspondence between pressure, impedance, and temperature. Based on the interface pressure information, the internal resistance information, and the temperature information, a preset fault diagnosis model is used to diagnose faults in the solid-state battery, including: The preset fault diagnosis model determines whether the measured impedance value of each cell satisfies the corresponding relationship with the measured temperature and measured pressure. If the measured impedance value corresponding to at least one second target cell does not satisfy the corresponding relationship with the corresponding measured temperature and measured pressure, then the preset fault diagnosis model determines that the solid-state battery has experienced the target type of fault. If the measured impedance value of each cell satisfies the corresponding relationship with the measured temperature and measured pressure, then the preset fault diagnosis model determines that the solid-state battery has not experienced the target type of fault.

12. A solid-state battery management device, characterized in that, include: The acquisition module is used to acquire interface pressure information and status information during the operation of the solid-state battery; A diagnostic module is used to perform fault diagnosis on the solid-state battery based on the interface pressure information and the status information. The management module is used to manage the solid-state battery by invoking the corresponding control strategy if it is determined that the solid-state battery has experienced a target type of fault.

13. An electronic device, characterized in that, The device includes a processor and a memory, the memory storing computer-executable instructions that can be executed by the processor, the processor executing the computer-executable instructions to implement the solid-state battery management method according to any one of claims 1 to 11.

14. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when invoked and executed by a processor, cause the processor to implement the solid-state battery management method according to any one of claims 1 to 11.

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