Battery pack, thermal runaway early-warning control method for battery pack, and related device

Abstract

A battery pack, a thermal runaway early-warning control method for a battery pack, and a related device. The battery pack comprises: a plurality of battery cells, a BMS slave board, a BMS master control, a high-temperature detection module, and a fire-fighting and fire-extinguishing module, wherein the BMS slave board collects battery cell data of the battery cells; the high-temperature detection module collects temperature data of the battery cells; and on the basis of the received battery cell data and / or the received temperature data, the BMS master control sends an early-warning signal or performs fire extinguishing control processing on the battery cells by means of the fire-fighting and fire-extinguishing module.

Description

Battery pack, thermal runaway warning control method for battery pack, and related equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 23, 2023, with application number 202311715942.3. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery pack, a thermal runaway early warning control method for a battery pack, and related equipment. Background Art

[0003] With the increasing application of new energy battery systems in areas such as ships, energy storage, and commercial vehicles, the safety of battery systems themselves is becoming a growing concern. During use, thermal runaway and heat spread may occur. However, current methods for monitoring and alarming battery pack thermal runaway are primarily focused on detecting and alarming thermal runaway events within the battery pack. SUMMARY OF THE INVENTION

[0004] However, this method of monitoring and alarming after thermal runaway has occurred in the battery pack cannot implement corresponding anti-proliferation measures.

[0005] In a first aspect, an embodiment of the present application provides a battery pack, comprising: a plurality of battery cells, a BMS slave board, a BMS master control, a high temperature detection module, and a fire extinguishing module, wherein the BMS slave board, the high temperature detection module, and the fire extinguishing module are respectively communicatively connected to the BMS master control;

[0006] The BMS slave board is in communication with each battery cell and is configured to collect battery cell data corresponding to each battery cell and send the battery cell data to the BMS master control;

[0007] The high temperature detection module is connected to each battery cell and is configured to collect the temperature data corresponding to each battery cell and send the temperature data to the BMS main control;

[0008] The fire extinguishing module is configured to respond to the start-up instruction sent by the BMS master to prevent heat diffusion in the battery cells.

[0009] In a second aspect, embodiments of the present application provide a thermal runaway early warning control method for a battery pack. The thermal runaway early warning control method for a battery pack is applied to the battery pack of any one of the first aspects, wherein the battery pack includes a plurality of battery cells. The thermal runaway early warning control method for a battery pack includes:

[0010] Get the cell data corresponding to each cell;

[0011] Get the temperature data corresponding to each battery cell;

[0012] Determine the risk level of thermal runaway for each battery cell based on battery cell data and / or temperature data;

[0013] If the risk level detected is lower than the preset heat diffusion level, an early warning signal corresponding to the risk level will be issued;

[0014] If it is detected that the risk level is greater than or equal to the preset heat diffusion level, fire extinguishing control processing is performed on the battery cells whose risk level is greater than or equal to the preset heat diffusion level to prevent heat diffusion.

[0015] In a third aspect, embodiments of the present application provide a thermal runaway warning control device for a battery pack, the thermal runaway warning control device for a battery pack being applied to the battery pack of any one of the first aspects; the thermal runaway warning control device for a battery pack comprising:

[0016] A first acquisition module is used to obtain cell data corresponding to each cell;

[0017] The second acquisition module is used to obtain the temperature data corresponding to each battery cell;

[0018] A judgment module is used to judge the risk level of thermal runaway of each battery cell based on battery cell data and / or temperature data;

[0019] An early warning module is used to issue an early warning signal corresponding to the risk level if the risk level detected is lower than the preset heat diffusion level;

[0020] The control module is used to perform fire extinguishing control processing on the battery cells with risk levels greater than or equal to the preset heat diffusion level to prevent heat diffusion if it is detected that the risk level is greater than or equal to the preset heat diffusion level.

[0021] In a fourth aspect, an embodiment of the present application provides an electronic device, the electronic device comprising:

[0022] one or more processors;

[0023] Memory; and

[0024] One or more applications, wherein the one or more applications are stored in a memory and configured to be executed by a processor to implement the steps in the thermal runaway warning control method for a battery pack of any one of the second aspects.

[0025] In a fifth aspect, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored, and the computer program is loaded by a processor to execute the steps in the thermal runaway warning control method of a battery pack according to any one of the second aspects. Beneficial effects

[0026] Beneficial effects of this application:

[0027] In an embodiment of the present application, the cell data corresponding to each cell is collected from the BMS board and the cell data is sent to the BMS main control; the temperature data corresponding to each cell is collected through the high-temperature detection module, and the temperature data is sent to the BMS main control; the BMS main control determines the risk level of thermal runaway of each cell based on the received cell data and / or temperature data, and when the risk level is less than the preset thermal diffusion level, it sends a warning signal corresponding to the risk level, and when the risk level is greater than or equal to the preset thermal diffusion level, it sends a start instruction to the fire extinguishing module; the fire extinguishing function is activated by the fire extinguishing module to perform fire extinguishing control processing on the cells with a risk level greater than or equal to the preset thermal diffusion level to prevent thermal diffusion, thereby achieving a comprehensive and accurate judgment of the thermal runaway of the cells in the battery pack, and issuing a warning when the thermal diffusion conditions are not met. When the thermal diffusion conditions are met, the fire extinguishing processing is carried out in time, effectively suppressing the thermal diffusion of the cells in the battery pack, and improving the safety performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0029] FIG1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application;

[0030] FIG2 is another schematic structural diagram of a battery pack provided in an embodiment of the present application;

[0031] FIG3 is a flow chart of an embodiment of a thermal runaway early warning control method for a battery pack provided in an embodiment of the present application;

[0032] FIG4 is a schematic structural diagram of an embodiment of a thermal runaway warning control device for a battery pack provided in an embodiment of the present application;

[0033] FIG5 is a schematic structural diagram of an embodiment of an electronic device provided in an embodiment of the present application. Modes for Carrying Out the Invention

[0034] As shown in Figure 1, this is a structural diagram of a battery pack in an embodiment of the present application. The battery pack includes multiple battery cells, a BMS slave board, a BMS master control, a high-temperature detection module, and a fire extinguishing module. The BMS slave board, the high-temperature detection module, and the fire extinguishing module are respectively communicated with the BMS master control.

[0035] The battery pack contains at least two cells. Both the BMS slave board and the BMS master are management modules within the BMS battery management system. In this embodiment, the BMS slave board collects data and transmits it to the BMS master, which analyzes the collected data. The BMS slave board, high-temperature detection module, and fire extinguishing module are each connected to the BMS master.

[0036] The BMS slave board is in communication with each battery cell and is configured to collect battery cell data corresponding to each battery cell and send the battery cell data to the BMS master control.

[0037] Specifically, the BMS slave board is used to collect cell data corresponding to each cell, such as voltage, temperature or temperature rise, and send the cell data to the BMS master control so that the BMS master control can perform thermal runaway detection on each cell based on the collected cell data.

[0038] The high temperature detection module is connected to each battery cell and is configured to collect the temperature data corresponding to each battery cell and send the temperature data to the BMS master control.

[0039] Among them, the high temperature detection module can be connected to each battery cell by welding or gluing. The high temperature detection module can be a temperature sensor or NTC, which is used to collect the temperature data corresponding to each battery cell in real time and send the temperature data to the BMS main control so that the BMS main control can perform thermal runaway detection on each battery cell based on the collected temperature data.

[0040] The BMS main control is configured to determine the risk level of thermal runaway of each battery cell based on the received battery cell data and / or temperature data, and to issue a warning signal corresponding to the risk level when the risk level is less than the preset thermal diffusion level, and to send a start instruction to the fire extinguishing module when the risk level is greater than or equal to the preset thermal diffusion level.

[0041] Among them, the risk level is used to characterize the level of thermal runaway risk of the battery cell, and the preset thermal diffusion level refers to the level of thermal runaway. For example, the risk level can be level one, level two, level three and level four, etc. Level one represents a high battery cell temperature, level two represents an excessively high battery cell temperature, level three represents thermal runaway, and level four represents thermal diffusion. The preset thermal diffusion level can be level three.

[0042] Specifically, the BMS main control can analyze the data thresholds corresponding to the battery cell data and the preset thermal runaway level, or analyze the data thresholds corresponding to the temperature data and the preset thermal runaway level, or analyze the battery cell data and temperature data based on the data thresholds corresponding to the preset thermal runaway level to determine the risk level of thermal runaway for each battery cell. When the risk level is less than the preset thermal diffusion level, it indicates that the probability of thermal runaway in the battery pack is low, and the warning information corresponding to the risk level is output. For example, when the risk level is level one, a level one warning instruction is issued; when the risk level is greater than or equal to the preset thermal diffusion level, it indicates that thermal runaway heat diffusion will occur in the battery pack. Therefore, the BMS main control sends a start instruction to the fire extinguishing module to suppress the thermal diffusion of the battery cell and protect the battery pack.

[0043] The fire extinguishing module is configured to respond to the start-up instruction sent by the BMS master to prevent heat diffusion in the battery cells.

[0044] Among them, the fire extinguishing module can be an aerosol system, which extinguishes the battery cells or battery packs in thermal runaway by spraying aerosol.

[0045] Specifically, when the fire extinguishing module receives the start-up instruction sent by the BMS main control module, it starts the fire extinguishing function to perform fire extinguishing control processing on the battery cells whose risk level is greater than or equal to the preset thermal diffusion level to prevent thermal diffusion of the battery cells in the battery pack.

[0046] The battery pack in the embodiment of the present application realizes a comprehensive and accurate judgment of the thermal runaway of the battery cells in the battery pack, and issues an early warning corresponding to the corresponding risk level when the thermal diffusion conditions are not met. When the thermal diffusion conditions are met, fire extinguishing is carried out in a timely manner, effectively suppressing the thermal diffusion of the battery cells in the battery pack and improving the safety performance of the battery pack.

[0047] Each battery cell is equipped with a signal point, and each signal point leads to a signal line; the BMS slave board is connected to the signal line through a wiring harness to collect the battery cell data of the corresponding battery cell.

[0048] Specifically, each battery cell is configured with a signal point, and a signal line is led out from the signal point. The BMS slave board is connected to the signal line through a wiring harness, and the signal is transmitted to the BMS slave board through the signal line, thereby realizing the collection of battery cell signals, such as voltage, temperature and other data, that is, collecting the battery cell data corresponding to each signal point, and sending the signal point and the corresponding battery cell data to the BMS main control, so that the main control can distinguish each battery cell and accurately locate the battery cell.

[0049] The high temperature detection module is connected to the signal line through a wiring harness and is configured to collect temperature data of the corresponding battery cell.

[0050] Specifically, the high-temperature detection module is connected to the signal line through a wiring harness, and the signal line is transmitted to the high-temperature detection module, thereby realizing the collection of temperature data in the battery cell signal, that is, collecting the temperature data corresponding to each signal point, and sending the signal point and the corresponding battery cell data to the BMS main control, so that the main control can distinguish each battery cell and accurately locate the battery cell.

[0051] It is worth noting that the cell data includes the cell temperature; the BMS main control is also used to verify the cell temperature and temperature data, obtain the temperature verification result, and judge the risk level of thermal runaway of each cell based on the temperature verification result and the cell data. Among them, the verification result is used to characterize whether the cell temperature collected by the BMS slave board is close to the temperature data collected by the high-temperature detection module, including two situations: the temperature is close and the temperature difference is large. Specifically, the BMS main control verifies the cell temperature and temperature data and obtains the temperature verification result. When the verification result is that the temperature is close, it indicates that the cell temperature and temperature data are relatively accurate. When the verification result is that the temperature difference is large, the risk level of thermal runaway of each cell can be judged based on the cell data. In this embodiment, by verifying the temperature data collected in real time by the high-temperature detection module and the cell temperature in the cell data collected by the BMS slave board, misjudgment of the collected data is avoided, the accuracy of the collected data is ensured, and the accuracy of the thermal runaway detection of the cell is thereby improved.

[0052] As shown in Figure 2, which is a structural diagram of another battery pack, the battery pack also includes a fire detection module, which is communicatively connected to the fire extinguishing module. The fire detection module includes at least one of a smoke detector, a smoke detector and a temperature sensor; the fire detection module is used to drive the fire extinguishing module to perform a fire extinguishing function to prevent the battery pack from catching fire and exploding.

[0053] Specifically, the fire detection module includes a smoke detector, a smoke sensor and a temperature sensor. The fire detection module collects at least one of the smoke volume, temperature data and gas concentration of the battery pack, and when any abnormality in the smoke volume, temperature data and gas concentration is detected, the fire extinguishing module is driven to perform the fire extinguishing function to prevent the battery pack from catching fire and exploding, further effectively suppressing the thermal diffusion of the battery pack, and when the BMS slave board, BMS main control and high temperature detection module fail, it can also timely detect and effectively suppress the thermal runaway thermal diffusion of the battery pack, providing double protection for the battery pack and further improving the safety performance of the battery pack.

[0054] The battery pack also includes a heat insulating sheet, which is arranged between two adjacent battery cells.

[0055] Specifically, additional thermal insulation sheets are added to the battery pack's cell level to prevent thermal runaway from spreading to other cells, thereby protecting cells that are not experiencing thermal runaway. It can be understood that in this embodiment, by placing a thermal insulation sheet between two adjacent cells, not only can the spread of thermal runaway be prevented, but also, when both the fire extinguishing module and the fire detection module are simultaneously disabled, the impact of the cell experiencing thermal runaway on other cells can be prevented, thus preventing the spread of thermal runaway in the battery pack. This provides further assurance for the battery pack's thermal runaway control.

[0056] The battery pack also includes a main circuit power-on control module, which is connected to the BMS main control communication module.

[0057] Specifically, the battery pack also includes a main circuit power-on control module, which is in communication with the BMS controller and controls the main circuit power-on of the battery pack, including enabling and disabling it. When the BMS controller detects a risk level greater than or equal to a preset thermal diffusion level, indicating the possibility of thermal diffusion, it sends a disable power-on command to the main circuit power-on control module, halting charging and discharging. This enables early detection of thermal runaway in the battery pack and further ensures its safety.

[0058] As shown in FIG3 , an embodiment of the present application further provides a thermal runaway early warning control method for a battery pack, wherein the battery pack includes a plurality of battery cells. The method includes:

[0059] 101. Obtain cell data corresponding to each cell;

[0060] 102. Obtain temperature data corresponding to each battery cell;

[0061] 103. Determine the risk level of thermal runaway for each battery cell based on the battery cell data and / or temperature data;

[0062] 104. If the risk level detected is lower than the preset heat diffusion level, an early warning signal corresponding to the risk level is issued;

[0063] 105. If it is detected that the risk level is greater than or equal to the preset thermal diffusion level, fire extinguishing control treatment is performed on the battery cells with risk levels greater than or equal to the preset thermal diffusion level to prevent thermal diffusion.

[0064] Specifically, the BMS main control in the battery pack obtains the cell data corresponding to each cell and the temperature data corresponding to each cell. Then, based on the cell data and / or temperature data, it determines the risk level of thermal runaway for each cell. When it is detected that the risk level is less than the preset thermal diffusion level, a warning signal corresponding to the risk level is issued. When it is detected that the risk level is greater than or equal to the preset thermal diffusion level, fire extinguishing control processing is performed on the cell with a risk level greater than or equal to the preset thermal diffusion level to prevent thermal diffusion. This embodiment first obtains relevant data of the cell, and then obtains thermal runaway detection based on the relevant data to ensure the accuracy of the detection. Then, the corresponding thermal runaway processing measures are initiated according to the thermal runaway detection results to ensure the timeliness and effectiveness of the thermal runaway warning control.

[0065] The battery cell data includes battery cell voltage, battery cell temperature and battery cell temperature rise; based on the battery cell data and / or temperature data, the risk level of thermal runaway of each battery cell is judged, including: if the battery cell temperature rise is less than the preset temperature rise threshold, it is judged that the risk level of thermal runaway of the corresponding battery cell is less than the preset thermal diffusion level; if the battery cell temperature rise is greater than or equal to the preset temperature rise threshold, and at least one of the battery cell voltage and battery cell temperature does not meet the corresponding threshold, it is judged that the risk level of thermal runaway of the corresponding battery cell is greater than or equal to the preset thermal diffusion level; if the battery cell temperature rise is greater than or equal to the preset temperature rise threshold, and at least one of the battery cell voltage and temperature data does not meet the corresponding threshold, it is judged that the risk level of thermal runaway of the corresponding battery cell is greater than or equal to the preset thermal diffusion level.

[0066] Among them, the battery cell data includes battery cell voltage, battery cell temperature and battery cell temperature rise. The battery cell voltage, battery cell temperature and battery cell temperature rise respectively correspond to thresholds for judging the risk level of thermal runaway. For example, the preset temperature rise threshold corresponding to the battery cell temperature rise is 1°C / s, and the threshold corresponding to the battery cell temperature is 75°C.

[0067] Specifically, when the temperature rise of the battery cell is less than the preset temperature rise threshold, it is determined that the risk level of thermal runaway of the corresponding battery cell is less than the preset thermal diffusion level, that is, when the temperature rise of the battery cell does not meet the conditions for thermal runaway, it indicates that the probability of thermal runaway of the corresponding battery cell is low. At this time, an early warning signal can be sent. When the temperature rise of the battery cell is greater than or equal to the preset temperature rise threshold, and at least one of the battery cell voltage and battery cell temperature does not meet the corresponding threshold, or when the temperature rise of the battery cell is greater than or equal to the preset temperature rise threshold, and at least one of the battery cell voltage and temperature data does not meet the corresponding threshold, it is determined that the risk level of thermal runaway of the corresponding battery cell is greater than or equal to the preset thermal diffusion level, thereby achieving accurate and comprehensive detection of thermal runaway of the battery pack and ensuring the accuracy of detection.

[0068] The thermal runaway warning control method of the battery pack also includes: obtaining at least one of the smoke volume, temperature data and gas concentration of the battery pack; detecting whether any one of the smoke volume, temperature data and gas concentration is abnormal; if abnormal, performing fire extinguishing control processing on the battery pack.

[0069] Specifically, at least one of the smoke volume, temperature data and gas concentration of the battery pack is obtained, and any one of the smoke volume, temperature data and gas concentration is detected to see if it is abnormal. If at least one of the data is abnormal, it indicates that the battery pack is at risk of thermal runaway. At this time, the battery pack is subjected to fire extinguishing control processing, thereby realizing real-time monitoring and timely processing of the thermal runaway of the battery pack.

[0070] The thermal runaway warning control method of the battery pack also includes: collecting temperature data of each battery cell in the battery pack; and performing temperature verification on the temperature data and the battery cell temperature.

[0071] Specifically, collecting the temperature data of each battery cell in the battery pack and performing temperature verification on the temperature data and the battery cell temperature can avoid temperature misjudgment and help improve the accuracy of subsequent thermal runaway detection.

[0072] As shown in FIG4 , an embodiment of the present application further provides a thermal runaway warning control device 200 for a battery pack. The thermal runaway warning control device 200 for a battery pack includes:

[0073] The first acquisition module 201 is used to obtain the cell data corresponding to each cell;

[0074] The second acquisition module 202 is used to obtain temperature data corresponding to each battery cell;

[0075] A judgment module 203 is used to judge the risk level of thermal runaway of each battery cell based on the battery cell data and / or temperature data;

[0076] The early warning module 204 is configured to issue an early warning signal corresponding to the risk level if the risk level is detected to be lower than a preset thermal diffusion level;

[0077] The control module 205 is configured to, if it is detected that the risk level is greater than or equal to the preset heat diffusion level, perform fire extinguishing control processing on the battery cells with the risk level greater than or equal to the preset heat diffusion level to prevent heat diffusion.

[0078] In one embodiment, the determination module 203 is specifically configured to:

[0079] If the cell temperature rise is less than the preset temperature rise threshold, it is determined that the risk level of thermal runaway of the corresponding cell is less than the preset thermal diffusion level;

[0080] If the cell temperature rise is greater than or equal to the preset temperature rise threshold, and at least one of the cell voltage and cell temperature does not meet the corresponding threshold, it is determined that the risk level of thermal runaway of the corresponding cell is greater than or equal to the preset thermal diffusion level;

[0081] If the temperature rise of the battery cell is greater than or equal to the preset temperature rise threshold, and at least one of the battery cell voltage and temperature data does not meet the corresponding threshold, it is determined that the risk level of thermal runaway of the corresponding battery cell is greater than or equal to the preset thermal diffusion level.

[0082] In one embodiment, the thermal runaway warning control device of the battery pack further includes:

[0083] a third acquisition module, configured to acquire at least one of smoke volume, temperature data, and gas concentration of the battery pack;

[0084] Detection module, used to detect whether any of the smoke volume, temperature data and gas concentration is abnormal;

[0085] The processing module is used to perform fire extinguishing control on the battery pack if an abnormality occurs.

[0086] In one embodiment, the thermal runaway warning control device of the battery pack further includes:

[0087] The acquisition module is used to collect the temperature data of each battery cell in the battery pack;

[0088] The verification module is used to verify the temperature data and battery cell temperature.

[0089] The present application also provides an electronic device that integrates any one of the battery pack thermal runaway warning control devices provided in the present application. The electronic device includes:

[0090] one or more processors;

[0091] Memory; and

[0092] One or more applications, wherein the one or more applications are stored in a memory and configured to be executed by a processor to execute the thermal runaway warning control method for a battery pack in any of the embodiments of the thermal runaway warning control method for a battery pack.

[0093] The present application also provides an electronic device that integrates any of the battery pack thermal runaway warning control devices provided in the present application. As shown in FIG5 , it shows a schematic diagram of the structure of the electronic device involved in the present application embodiment. Specifically:

[0094] The electronic device may include components such as a processor 301 with one or more processing cores, a memory 302 with one or more computer-readable storage media, a power supply 303, and an input unit 304. Those skilled in the art will appreciate that the electronic device structure shown in FIG5 does not limit the electronic device and may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0095] The processor 301 is the control center of the electronic device. It connects all parts of the electronic device using various interfaces and lines. By running or executing software programs and / or modules stored in the memory 302 and accessing data stored in the memory 302, it performs various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. Optionally, the processor 301 may include one or more processing cores; preferably, the processor 301 may integrate an application processor and a modem processor, wherein the application processor primarily processes the operating system, user interface, and application programs, while the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into the processor 301.

[0096] Memory 302 can be used to store software programs and modules. Processor 301 executes various functional applications and data processing by running the software programs and modules stored in memory 302. Memory 302 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function (such as sound playback or image playback); the data storage area may store data generated based on the use of the electronic device. Memory 302 may also include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, memory 302 may also include a memory controller to provide processor 301 with access to memory 302.

[0097] The electronic device also includes a power supply 303 for supplying power to various components. Preferably, the power supply 303 can be logically connected to the processor 301 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The power supply 303 can also include one or more DC or AC power supplies, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and other arbitrary components.

[0098] The electronic device may further include an input unit 304, which may be configured to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0099] Although not shown, the electronic device may further include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 301 in the electronic device will load the executable files corresponding to the processes of one or more application programs into the memory 302 according to the following instructions, and the processor 301 will run the application programs stored in the memory 302 to implement various functions as follows:

[0100] Get the cell data corresponding to each cell;

[0101] Get the temperature data corresponding to each battery cell;

[0102] Determine the risk level of thermal runaway for each battery cell based on battery cell data and / or temperature data;

[0103] If the risk level detected is lower than the preset heat diffusion level, an early warning signal corresponding to the risk level will be issued;

[0104] If it is detected that the risk level is greater than or equal to the preset heat diffusion level, fire extinguishing control processing is performed on the battery cells whose risk level is greater than or equal to the preset heat diffusion level to prevent heat diffusion.

[0105] Those skilled in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be accomplished by instructions, or by controlling related hardware through instructions. The instructions may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0106] To this end, embodiments of the present application provide a computer-readable storage medium, which can be either non-volatile or volatile. The computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), a magnetic disk, or an optical disk. A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps of any of the battery pack thermal runaway warning control methods provided in embodiments of the present application. For example, the computer program loaded by the processor may execute the following steps:

[0107] Get the cell data corresponding to each cell;

[0108] Get the temperature data corresponding to each battery cell;

[0109] Determine the risk level of thermal runaway for each battery cell based on battery cell data and / or temperature data;

[0110] If the risk level detected is lower than the preset heat diffusion level, an early warning signal corresponding to the risk level will be issued;

[0111] If it is detected that the risk level is greater than or equal to the preset heat diffusion level, fire extinguishing control processing is performed on the battery cells whose risk level is greater than or equal to the preset heat diffusion level to prevent heat diffusion.

Claims

1. A battery pack, comprising: A plurality of battery cells, a BMS slave board, a BMS master control, a high temperature detection module and a fire extinguishing module, wherein the BMS slave board, the high temperature detection module and the fire extinguishing module are respectively connected to the BMS master control for communication; The BMS slave board is in communication connection with each battery cell, and is configured to collect battery cell data corresponding to each battery cell, and send the battery cell data to the BMS master control; The high temperature detection module is connected to each battery cell and is configured to collect temperature data corresponding to each battery cell and send the temperature data to the BMS master control; The fire extinguishing module is configured to prevent heat diffusion of the battery cell in response to a start-up instruction sent by the BMS master control.

2. The battery pack according to claim 1, wherein: Each of the battery cells is provided with a signal point, and each of the signal points leads to a signal line; The BMS slave board is connected to the signal line through a wiring harness and is configured to collect cell data of the corresponding cell.

3. The battery pack according to claim 2, wherein: The high temperature detection module is connected to the signal line through a wiring harness and is configured to collect temperature data of the corresponding battery cell.

4. The battery pack according to claim 1, further comprising a fire detection module, wherein the fire detection module is communicatively connected with the fire extinguishing module, and the fire detection module comprises at least one of a smoke detector, a smoke sensor and a temperature sensor; The fire detection module is configured to drive the fire extinguishing module to perform a fire extinguishing function to prevent the battery pack from catching fire and exploding.

5. The battery pack according to any one of claims 1 to 4, further comprising a heat insulating sheet, wherein the heat insulating sheet is disposed between two adjacent battery cells.

6. The battery pack according to any one of claims 1 to 4, further comprising a main circuit power-on control module, wherein the main circuit power-on control module is communicatively connected to the BMS main control.

7. A thermal runaway early warning control method for a battery pack, the thermal runaway early warning control method for a battery pack being applied to a battery pack, the battery pack comprising a plurality of battery cells, the thermal runaway early warning control method for a battery pack comprising: Get the cell data corresponding to each cell; Get the temperature data corresponding to each battery cell; Determining a risk level of thermal runaway of each battery cell according to the battery cell data and / or the temperature data; If it is detected that the risk level is lower than the preset heat diffusion level, an early warning signal corresponding to the risk level is issued; If it is detected that the risk level is greater than or equal to the preset heat diffusion level, fire extinguishing control processing is performed on the battery cells whose risk level is greater than or equal to the preset heat diffusion level to prevent heat diffusion.

8. The thermal runaway early warning control method for a battery pack according to claim 7, wherein: The battery cell data includes battery cell voltage, battery cell temperature and battery cell temperature rise; The step of determining the risk level of thermal runaway of each battery cell according to the battery cell data and / or the temperature data includes: If the temperature rise of the battery cell is less than a preset temperature rise threshold, it is determined that the risk level of thermal runaway of the corresponding battery cell is less than a preset heat diffusion level; If the temperature rise of the battery cell is greater than or equal to the preset temperature rise threshold, and at least one of the battery cell voltage and the battery cell temperature does not meet the corresponding threshold, it is determined that the risk level of thermal runaway of the corresponding battery cell is greater than or equal to the preset heat diffusion level; If the temperature rise of the battery cell is greater than or equal to the preset temperature rise threshold, and at least one of the battery cell voltage and temperature data does not meet the corresponding threshold, it is determined that the risk level of thermal runaway of the corresponding battery cell is greater than or equal to the preset heat diffusion level.

9. The thermal runaway early warning control method of the battery pack according to claim 7, further comprising: Acquiring at least one of smoke volume, temperature data, and gas concentration of the battery pack; Detecting whether any one of the smoke volume, temperature data and gas concentration is abnormal; If there is an abnormality, fire extinguishing control is performed on the battery pack.

10. The thermal runaway early warning control method of the battery pack according to claim 8, further comprising: Collecting temperature data of each battery cell in the battery pack; A temperature check is performed on the temperature data and the battery cell temperature.

11. A thermal runaway warning control device for a battery pack, comprising: A first acquisition module is used to acquire the cell data corresponding to each cell; The second acquisition module is used to obtain temperature data corresponding to each battery cell; A judgment module, used for judging the risk level of thermal runaway of each battery cell according to the battery cell data and / or the temperature data; An early warning module, configured to issue an early warning signal corresponding to the risk level if it is detected that the risk level is lower than a preset heat diffusion level; The control module is used to perform fire extinguishing control processing on the battery cells whose risk level is greater than or equal to the preset heat diffusion level to prevent heat diffusion if it is detected that the risk level is greater than or equal to the preset heat diffusion level.

12. The thermal runaway warning control device for a battery pack according to claim 11, wherein: The judging module is used for: If the temperature rise of the battery cell is less than a preset temperature rise threshold, it is determined that the risk level of thermal runaway of the corresponding battery cell is less than a preset heat diffusion level; If the temperature rise of the battery cell is greater than or equal to the preset temperature rise threshold, and at least one of the battery cell voltage and the battery cell temperature does not meet the corresponding threshold, it is determined that the risk level of thermal runaway of the corresponding battery cell is greater than or equal to the preset heat diffusion level; If the temperature rise of the battery cell is greater than or equal to the preset temperature rise threshold, and at least one of the battery cell voltage and temperature data does not meet the corresponding threshold, it is determined that the risk level of thermal runaway of the corresponding battery cell is greater than or equal to the preset heat diffusion level.

13. The thermal runaway warning control device for a battery pack according to claim 11, further comprising: A third acquisition module, used to acquire at least one of the smoke volume, temperature data and gas concentration of the battery pack; A detection module, used to detect whether any one of the smoke volume, temperature data and gas concentration is abnormal; The processing module is used to perform fire extinguishing control processing on the battery pack if an abnormality occurs.

14. The thermal runaway warning control device for a battery pack according to claim 12, further comprising: A collection module, used to collect temperature data of each battery cell in the battery pack; The verification module is used to perform temperature verification on the temperature data and the battery cell temperature.

15. An electronic device, comprising: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the thermal runaway warning control method for the battery pack as described in any one of claims 7 to 10.

16. A storage medium comprising computer executable instructions, wherein the computer executable instructions are used to execute the thermal runaway early warning control method for a battery pack according to any one of claims 7 to 10 when executed by a computer processor.

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