WO2021238706A1 - 电池热失控预警方法、装置、介质和设备 - Google Patents
电池热失控预警方法、装置、介质和设备 Download PDFInfo
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- 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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
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- 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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/005—Circuits arrangements for indicating a predetermined temperature
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- 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
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- 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
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- 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
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- 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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- 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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present disclosure relates to the technical field of battery management, and in particular to a method, device, medium and equipment for early warning of battery thermal runaway.
- the present disclosure proposes a battery thermal runaway warning method, device, medium and equipment to improve the accuracy and rapidity of the battery thermal runaway warning.
- the battery thermal runaway early warning method includes:
- the current temperature data count the number of main-level features at the current moment, where the main-level features include abnormal temperature characteristics of the temperature sensor, and the number of main-level features at the current moment refers to the number of main-level features that are arranged in the battery pack. The sum of the number of abnormal temperature characteristics of all the temperature sensors in the current moment;
- the number of occurrences of the primary features is greater than 0, the number of occurrences of secondary features at the current moment is counted according to the current voltage data and the current sensor disconnection data, wherein the secondary features include the voltage sensor The abnormal voltage characteristics and the sensor disconnection characteristics of the temperature sensor.
- the number of secondary features at the current moment refers to the sensor disconnection characteristics and all the sensor disconnection characteristics of all the temperature sensors arranged in the battery pack at the current moment. The sum of abnormal voltage characteristics of the voltage sensor at the current moment;
- an early warning device for battery thermal runaway including:
- An acquisition module for acquiring current temperature data of each temperature sensor arranged in the battery pack, current voltage data of each voltage sensor arranged in the battery pack, and current sensor disconnection data of each temperature sensor;
- the statistics module is configured to count the number of occurrences of main-level features at the current moment according to the current temperature data, and when the number of occurrences of the main-level features is greater than 0, according to the current voltage data and the current sensor disconnection data, Count the number of occurrences of secondary features at the current moment, where the primary features include abnormal temperature characteristics of the temperature sensor, and the number of occurrences of primary features at the current moment refers to all the temperature sensors arranged in the battery pack
- the sum of the number of abnormal temperature features that occur at the current moment, the secondary feature includes the abnormal voltage feature of the voltage sensor and the sensor disconnection feature of the temperature sensor, and the number of secondary feature occurrences at the current moment refers to the layout
- a calculation module for calculating the sum of the number of occurrences of the primary features and the number of occurrences of the secondary features at the current moment;
- the early warning module is used to perform an early warning of battery thermal runaway when the sum is greater than the preset characteristic number threshold.
- the present disclosure proposes a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the method according to the first embodiment of the present disclosure are realized.
- the present disclosure proposes an electronic device, including: a memory on which a computer program is stored; a processor, configured to execute the computer program in the memory, so as to implement the The steps of the method.
- the thermal runaway features are divided into primary features and secondary features, and only after the primary features are triggered, the secondary features will take effect, so it can reduce the false alarm rate of thermal runaway and speed up
- the method according to the embodiment of the present disclosure does not need to increase the hardware cost, and uses a simple method to improve the accuracy and speed of the thermal runaway warning.
- Fig. 1 is a flowchart of a battery thermal runaway warning method according to an embodiment of the present disclosure.
- Fig. 2 is a schematic block diagram of an early warning device for battery thermal runaway according to an embodiment of the present disclosure.
- Fig. 3 is a block diagram showing an electronic device according to an exemplary embodiment.
- Fig. 1 is a flowchart of a battery thermal runaway warning method according to an embodiment of the present disclosure. As shown in Figure 1, the method includes the following steps S11 to S15.
- step S11 the current temperature data of each temperature sensor arranged in the battery pack, the current voltage data of each voltage sensor arranged in the battery pack, and the current sensor disconnection data of each temperature sensor are acquired.
- the current temperature data sensed by the M1 temperature sensors, the current voltage data sensed by the M2 voltage sensors, and the current temperature data of the M1 temperature sensors are acquired.
- Current sensor disconnection data the current temperature data, current voltage data, and current sensor disconnection data can be obtained from the battery management system, or directly from the temperature sensor and the voltage sensor, respectively.
- step S12 according to the current temperature data, count the number of main-level features at the current moment, where the main-level features include temperature abnormalities of temperature sensors, and the number of main-level features at the current moment refers to all temperature sensors arranged in the battery pack The sum of the number of abnormal temperature features that occurred at the current moment.
- the abnormal temperature characteristics include that the current temperature of the temperature sensor in the battery pack exceeds a preset temperature threshold, and/or the current temperature rise rate of the temperature sensor in the battery pack exceeds Preset temperature rise rate threshold.
- the initial value of the main-level feature appearance number n1 is 0 when the statistics are started at each moment. That is, for example, when the statistics are started at the previous time, the initial value of the number of main-level features n1 is 0; then, when the statistics are started at the current time, the initial value of the number of main-level features n1 will be reset. Set to 0.
- the current temperature data sensed by the i-th temperature sensor in the aforementioned M1 temperature sensors triggers the following two conditions: (1) The current temperature of the temperature sensor exceeds the preset temperature threshold, that is, Ti>Tmax, where Ti is the current temperature sensed by the i-th temperature sensor, and Tmax is the preset temperature threshold; (2) The current temperature rise rate of the temperature sensor exceeds the preset temperature rise rate threshold, that is, Ti-T′i >Smax, where T'i is the temperature sensed by the i-th temperature sensor at the last moment, and Smax is the preset temperature rise rate threshold.
- the temperature rise rate refers to the difference between the current temperature of the temperature sensor and the temperature at the previous moment.
- the value of the number of main-level features n1 will increase by 1. For example, assuming that the current temperature sensed by the i-th temperature sensor exceeds the preset temperature threshold, the value of the number of main-level features n1 will be increased by 1, and then the current temperature rise rate of the i-th temperature sensor also exceeds the preset temperature Increasing the rate threshold, the number n1 of the main-level features will continue to increase by 1. After judging all the current temperature data of all M1 temperature sensors, the value of the number of main-level features n1 is equal to the sum of the main-level features of all temperature sensors in the battery pack at the current moment, so as to obtain the final main-level feature at the current moment. The number of level features is n1.
- step S13 when the number of primary features is greater than 0 (this means that the primary features are detected), the number of secondary features at the current moment is counted based on the current voltage data and the current sensor disconnection data, where the secondary features Including the abnormal voltage characteristics of the voltage sensor and the sensor disconnection characteristics of the temperature sensor.
- the number of secondary characteristics at the current moment refers to the sensor disconnection characteristics of all temperature sensors arranged in the battery pack at the current moment and the current sensor disconnection characteristics of all voltage sensors. The sum of the abnormal voltage characteristics that appear at all times.
- this step it is possible to sequentially determine whether the aforementioned M1 temperature sensors are disconnected according to the current sensor disconnection signal of the temperature sensor, and count the number of disconnected temperature sensors n2_T. Moreover, it will determine whether the current voltage data of the aforementioned M2 voltage sensors is abnormal, and count the number of voltage sensors in abnormal state n2_V. Specifically, when judging whether the current voltage data of the j-th voltage sensor is abnormal, it refers to whether its current voltage data meets any of the following conditions: the voltage sensor is disconnected, and the current voltage of the voltage sensor is greater than the preset upper limit voltage , The current voltage of the voltage sensor is less than the preset lower limit voltage.
- the initial values of n2, n2_T, and n2_V are all 0 when statistics are started at each moment. That is, for example, when statistics are started at the previous moment, the initial values of n2, n2_T, and n2_V are 0; then, when statistics are started at the current moment, the initial values of n2, n2_T, and n2_V will be reset to 0.
- the temperature sensor disconnection means that the circuit where the temperature sensor is located is disconnected, so that temperature detection cannot be performed; the voltage sensor disconnection means that the circuit where the voltage sensor is located is disconnected, so that the voltage detection cannot be performed.
- the temperature data and the voltage data at the next moment will be processed.
- step S15 if the sum N is greater than the preset feature number threshold Nmax, this indicates that a thermal runaway fault is detected at the current moment, and a battery thermal runaway warning is performed.
- the sum N is not greater than the preset feature number threshold Nmax, it means that no thermal runaway fault is detected at the current moment, and then according to the method of the embodiment of the present disclosure, the temperature data and voltage data at the next moment will be processed.
- the thermal runaway features are divided into primary features and secondary features, and only after the primary features are triggered, the secondary features will take effect, which can reduce the rate of thermal runaway false alarms and speed up the thermal response. Out-of-control response speed; In addition, because it makes reasonable use of temperature and voltage disconnection information, it can reduce the rate of thermal runaway false alarms.
- the method according to the embodiment of the present disclosure does not need to increase the hardware cost, and uses a simple method to improve the accuracy and speed of the thermal runaway warning.
- Fig. 2 is a schematic block diagram of an early warning device for battery thermal runaway according to an embodiment of the present disclosure.
- the device includes: an acquisition module 21 for acquiring the current temperature data of each temperature sensor arranged in the battery pack, the current voltage data of each voltage sensor arranged in the battery pack, and the current temperature of each temperature sensor. Sensor disconnection data; the statistics module 22 is used to count the number of main-level features present at the current time based on the current temperature data.
- the current voltage data and current sensor disconnection data are used to count the current
- the number of secondary features at the moment where the primary features include temperature abnormalities of temperature sensors, and the number of primary features at the current time refers to the sum of the number of abnormal temperature features of all temperature sensors arranged in the battery pack at the current time.
- the secondary characteristics include the abnormal voltage characteristics of the voltage sensor and the sensor disconnection characteristics of the temperature sensor.
- the number of secondary characteristics at the current moment refers to the sensor disconnection characteristics and all voltages of all temperature sensors arranged in the battery pack at the current moment.
- the sum of the voltage abnormal features of the sensor at the current moment is used to calculate the sum of the number of primary features and the number of secondary features at the current moment; the early warning module 24 is used when the sum is greater than the preset feature number threshold In the case of battery thermal runaway warning.
- the thermal runaway features are divided into primary features and secondary features, and only after the primary features are triggered, the secondary features will take effect, which can reduce the rate of thermal runaway false alarms and speed up the thermal response. Out-of-control response speed; In addition, because it makes reasonable use of temperature and voltage disconnection information, it can reduce the rate of thermal runaway false alarms.
- the method according to the embodiment of the present disclosure does not need to increase the hardware cost, and uses a simple method to improve the accuracy and speed of the thermal runaway warning.
- the current temperature data includes the current temperature and the current temperature rise rate
- the abnormal temperature feature includes that the current temperature of the temperature sensor in the battery pack exceeds a preset temperature threshold, and/or the current temperature rise rate of the temperature sensor in the battery pack Exceeds the preset temperature rise rate threshold.
- the abnormal voltage characteristics include disconnection of the voltage sensor in the battery pack, the current voltage of the voltage sensor in the battery pack is greater than the preset upper limit voltage, and the current voltage of the voltage sensor in the battery pack is less than the preset lower limit voltage.
- the early warning module 24 is also used to determine that no thermal runaway has occurred when the number of occurrences of the main-level features is equal to zero.
- Fig. 3 is a block diagram showing an electronic device 700 according to an exemplary embodiment.
- the electronic device 700 may include: a processor 701 and a memory 702.
- the electronic device 700 may further include one or more of a multimedia component 703, an input/output (I/O) interface 704, and a communication component 705.
- the processor 701 is used to control the overall operation of the electronic device 700 to complete all or part of the steps in the above-mentioned battery thermal runaway warning method.
- the memory 702 is used to store various types of data to support operations on the electronic device 700. These data may include, for example, instructions for any application or method to operate on the electronic device 700, and application-related data , Such as contact data, messages sent and received, pictures, audio, video, etc.
- the memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, SRAM for short), electrically erasable programmable read-only memory ( Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-only Memory (Read-Only Memory, ROM for short), magnetic memory, flash memory, magnetic disk or optical disk.
- the multimedia component 703 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and/or input audio signals.
- the audio component may include a microphone, which is used to receive external audio signals.
- the received audio signal may be further stored in the memory 702 or sent through the communication component 705.
- the audio component also includes at least one speaker for outputting audio signals.
- the I/O interface 704 provides an interface between the processor 701 and other interface modules.
- the above-mentioned other interface modules may be a keyboard, a mouse, a button, and the like. These buttons can be virtual buttons or physical buttons.
- the communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, or 4G, or a combination of one or more of them, so the corresponding communication component 705 may include: Wi-Fi module, Bluetooth module, NFC module.
- the electronic device 700 may be used by one or more application specific integrated circuits (Application Specific Integrated Circuit, ASIC for short), digital signal processor (Digital Signal Processor, DSP for short), and digital signal processing equipment (Digital Signal Processor).
- ASIC Application Specific Integrated Circuit
- DSP Digital Signal Processor
- Digital Signal Processor Digital Signal Processor
- DSPD Signal Processing Device
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- controller microcontroller, microprocessor or other electronic components Realized, used to implement the above-mentioned battery thermal runaway early warning method.
- a computer-readable storage medium including program instructions that, when executed by a processor, implement the steps of the foregoing battery thermal runaway warning method.
- the computer-readable storage medium may be the foregoing memory 702 including program instructions, which may be executed by the processor 701 of the electronic device 700 to complete the foregoing battery thermal runaway warning method.
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Abstract
Description
Claims (10)
- 一种电池热失控预警方法,其特征在于,包括:获取布置在电池包内的各个温度传感器的当前温度数据、布置在所述电池包内的各个电压传感器的当前电压数据以及所述各个温度传感器的当前传感器断线数据;根据所述当前温度数据,统计当前时刻主级特征出现数量,其中所述主级特征包括所述温度传感器的温度异常特征,所述当前时刻主级特征出现数量指的是布置在所述电池包内的所有所述温度传感器在当前时刻出现的温度异常特征数量之和;在所述主级特征出现数量大于0的情况下,根据所述当前电压数据以及所述当前传感器断线数据,统计当前时刻次级特征出现数量,其中所述次级特征包括所述电压传感器的电压异常特征和所述温度传感器的传感器断线特征,所述当前时刻次级特征出现数量指的是布置在所述电池包内的所有所述温度传感器在当前时刻出现的传感器断线特征和所有所述电压传感器在当前时刻出现的电压异常特征之和;计算当前时刻下所述主级特征出现数量和所述次级特征出现数量的总和;在所述总和大于预设特征数阈值的情况下,进行电池热失控预警。
- 根据权利要求1所述的方法,其特征在于,所述当前温度数据包括当前温度和当前温升速率,则所述温度异常特征包括所述电池包内的所述温度传感器的当前温度超过预设温度阈值,和/或所述电池包内的所述温度传感器的当前温升速率超过预设温升速率阈值。
- 根据权利要求1或2所述的方法,其特征在于,所述电压异常特征包括所述电池包内的所述电压传感器断线、所述电池包内的所述电压传感器的当前电压大于预设上限电压、所述电池包内的所述电压传感器的当前电压小于预设下限电压。
- 根据权利要求1至3中任一权利要求所述的方法,其特征在于,所述方法还包括:在所述主级特征出现数量等于0的情况下,确定没有出现热失控。
- 一种电池热失控预警装置,其特征在于,包括:获取模块,用于获取布置在电池包内的各个温度传感器的当前温度数据、布置在所述电池包内的各个电压传感器的当前电压数据以及所述各个温度传感器的当前传感器断线数据;统计模块,用于根据所述当前温度数据,统计当前时刻主级特征出现数量,在所述主级特征出现数量大于0的情况下,根据所述当前电压数据以及所述当前传感器断线数据,统计当前时刻次级特征出现数量,其中所述主级特征包括所述温度传感器的温度异 常特征,所述当前时刻主级特征出现数量指的是布置在所述电池包内的所有所述温度传感器在当前时刻出现的温度异常特征数量之和,所述次级特征包括所述电压传感器的电压异常特征和所述温度传感器的传感器断线特征,所述当前时刻次级特征出现数量指的是布置在所述电池包内的所有所述温度传感器在当前时刻出现的传感器断线特征和所有所述电压传感器在当前时刻出现的电压异常特征之和;计算模块,用于计算当前时刻下所述主级特征出现数量和所述次级特征出现数量的总和;预警模块,用于在所述总和大于预设特征数阈值的情况下,进行电池热失控预警。
- 根据权利要求5所述的装置,其特征在于,所述当前温度数据包括当前温度和当前温升速率,则所述温度异常特征包括所述电池包内的所述温度传感器的当前温度超过预设温度阈值,和/或所述电池包内的所述温度传感器的当前温升速率超过预设温升速率阈值。
- 根据权利要求5或6所述的装置,其特征在于,所述电压异常特征包括所述电池包内的所述电压传感器断线、所述电池包内的所述电压传感器的当前电压大于预设上限电压、所述电池包内的所述电压传感器的当前电压小于预设下限电压。
- 根据权利要求5至7中任一权利要求所述的装置,其特征在于,所述预警模块还用于,在所述主级特征出现数量等于0的情况下确定没有出现热失控。
- 一种计算机可读存储介质,其上存储有计算机程序,其特征在于,该程序被处理器执行时实现权利要求1-4中任一项所述方法的步骤。
- 一种电子设备,其特征在于,包括:存储器,其上存储有计算机程序;处理器,用于执行所述存储器中的所述计算机程序,以实现权利要求1-4中任一项所述方法的步骤。
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