Battery pack and thermal runaway warning control method for battery pack

Abstract

The present invention provides a battery pack and a thermal runaway early warning control method for the battery pack. The battery pack comprises: a plurality of battery cells, a BMS slave board, a BMS main control, an over-temperature detection module and a fire extinguishing module. The BMS slave board collects battery cell data corresponding to each battery cell and sends it to the BMS main control. The over-temperature detection module collects temperature data corresponding to each battery cell and sends it to the BMS main control. The BMS main control determines the risk level of thermal runaway of each battery cell according to the received battery cell data and / or temperature data, and sends a warning signal corresponding to the risk level when the risk level is less than a preset thermal diffusion level. When the risk level is greater than or equal to the preset thermal diffusion level, the fire extinguishing function of the fire extinguishing module is used to perform fire extinguishing control processing on the battery cell to prevent thermal diffusion, so that the BMS main control can target the thermal runaway situation of the battery cell and take corresponding processing measures, thereby effectively suppressing the thermal diffusion of the battery cell in the battery pack and improving the safety performance of the battery pack.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery pack and a thermal runaway early warning control method for the battery pack. Background Art

[0002] Generally, with the increasing application of new energy battery systems in ships, energy storage, commercial vehicles, etc., the safety of the battery system itself is also a focus of increasing attention. During use, thermal runaway and thermal diffusion may occur. However, the current thermal runaway of the battery pack is mainly monitored and alarmed after the thermal runaway phenomenon has occurred in the battery pack, and the corresponding anti-diffusion measures cannot be implemented. Summary of the invention

[0003] Embodiments of the present invention provide a battery pack, a battery pack, and a thermal runaway early warning control method for a battery pack, which can effectively suppress heat diffusion of cells in the battery pack and improve the safety performance of the battery pack.

[0004] In a first aspect, an embodiment of the present invention provides a battery pack, the battery pack comprising: a plurality of battery cells, a BMS slave board, a BMS master control, an over-temperature detection module and a fire extinguishing module, the BMS slave board, the over-temperature detection module and the fire extinguishing module are respectively connected to the BMS master control for communication;

[0005] The BMS slave board is connected to each battery cell for collecting battery cell data corresponding to each battery cell and sending the battery cell data to the BMS master control;

[0006] The over-temperature detection module is connected to each battery cell, and is used to collect temperature data corresponding to each battery cell, and send the temperature data to the BMS master control;

[0007] The fire extinguishing module is used to respond to the start-up instruction sent by the BMS master control to prevent heat diffusion of the battery cell.

[0008] In one embodiment, each of the battery cells is configured with a signal point, and each of the signal points leads to a signal line;

[0009] The BMS slave board is connected to the signal line through a wiring harness to collect cell data of the corresponding cell.

[0010] In one embodiment, the over-temperature detection module is connected to the signal line through a wiring harness to collect temperature data of the corresponding battery cell.

[0011] In one embodiment, the battery pack further includes a fire detection module, the fire detection module is communicatively connected to the fire extinguishing module, and the fire detection module includes at least one of a smoke detector, a smoke detector, and a temperature sensor;

[0012] 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.

[0013] In one embodiment, the battery pack further includes a heat insulating sheet, and the heat insulating sheet is disposed between two adjacent battery cells.

[0014] In one embodiment, the battery pack further includes a main circuit power-on control module, and the main circuit power-on control module is communicatively connected with the BMS main control.

[0015] In a second aspect, an embodiment of the present invention provides 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 according to any one of the first aspects, the battery pack comprising a plurality of battery cells; the thermal runaway early warning control method for a battery pack comprising:

[0016] Get the cell data corresponding to each cell;

[0017] Get the temperature data corresponding to each battery cell;

[0018] Determining the risk level of thermal runaway of each battery cell according to the battery cell data and / or the temperature data;

[0019] 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;

[0020] 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.

[0021] In one embodiment, the battery cell data includes battery cell voltage, battery cell temperature and battery cell temperature rise;

[0022] The step of judging the risk level of thermal runaway of each battery cell according to the battery cell data and / or the temperature data includes:

[0023] 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;

[0024] 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;

[0025] 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.

[0026] In one embodiment, it further includes:

[0027] Acquiring at least one of smoke volume, temperature data, and gas concentration of the battery pack;

[0028] Detecting whether any one of the smoke volume, temperature data and gas concentration is abnormal;

[0029] If there is an abnormality, the battery pack is subjected to fire extinguishing control processing.

[0030] In one embodiment, it further includes:

[0031] Collecting temperature data of each battery cell in the battery pack;

[0032] A temperature check is performed on the temperature data and the battery cell temperature.

[0033] In a third aspect, an embodiment of the present invention provides a thermal runaway warning control device for a battery pack, wherein the thermal runaway warning control device for a battery pack is applied to the battery pack according to any one of the first aspects; the thermal runaway warning control device for a battery pack comprises:

[0034] A first acquisition module is used to acquire cell data corresponding to each cell;

[0035] The second acquisition module is used to obtain temperature data corresponding to each battery cell;

[0036] 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;

[0037] 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;

[0038] 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.

[0039] Beneficial effects of the embodiments of the present invention:

[0040] In an embodiment of the present invention, 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 over-temperature detection module is used to collect the temperature data corresponding to each cell, and the temperature data is sent to the BMS main control; the BMS main control is used to judge the risk level of thermal runaway of each cell according to the received cell data and / or temperature data, and when the risk level is less than the preset thermal diffusion level, a warning signal corresponding to the risk level is issued, and when the risk level is greater than or equal to the preset thermal diffusion level, a start instruction is sent to the fire extinguishing module; the fire extinguishing function is started 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 realizing 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, and performing fire extinguishing processing in time when the thermal diffusion conditions are met, thereby 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

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 is a structural schematic diagram of a battery pack provided by an embodiment of the present invention;

[0043] Figure 2 is another structural schematic diagram of a battery pack provided in an embodiment of the present application;

[0044] Figure 3 It is a schematic 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;

[0045] Figure 4 It 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;

[0046] Figure 5 It is a schematic diagram of the structure of an embodiment of an electronic device provided in the embodiments of the present application. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device.

[0048] like Figure 1 As shown, it is a structural schematic diagram of a battery pack in an embodiment of the present application, which includes multiple battery cells, a BMS slave board, a BMS master control, an over-temperature detection module and a fire extinguishing module, wherein the BMS slave board, the over-temperature detection module and the fire extinguishing module are respectively communicatively connected with the BMS master control.

[0049] Among them, at least 2 battery cells are distributed inside the battery pack. The BMS slave board and the BMS master are both management modules in the BMS battery management system. The BMS in this embodiment is used to collect data and transmit it to the BMS master, and the BMS master is used to analyze the collected data. The BMS slave board, the over-temperature detection module and the fire extinguishing module are respectively connected to the BMS master for communication.

[0050] The BMS slave board is in communication connection with each battery cell, and is used to collect battery cell data corresponding to each battery cell, and send the battery cell data to the BMS master control.

[0051] 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.

[0052] The over-temperature detection module is connected to each battery cell, and is used to collect temperature data corresponding to each battery cell, and send the temperature data to the BMS main control.

[0053] Among them, the high temperature detection module can be connected to each battery cell by welding or gluing, and the over-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.

[0054] The BMS main control is used to determine the risk level of thermal runaway of each battery cell based on the received battery cell data and / or the temperature data, and to issue a warning signal corresponding to the risk level when the risk level is less than a 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.

[0055] Among them, the risk level is used to characterize the risk of thermal runaway in 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, where 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.

[0056] Specifically, the BMS main control can perform analysis based on the battery cell data and the data threshold corresponding to the preset thermal runaway level, or based on the temperature data and the data threshold corresponding to the preset thermal runaway level, or based on the battery cell data and temperature data, based on the data threshold 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 battery pack will not experience thermal runaway, 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 the battery pack will experience thermal runaway heat diffusion. Therefore, the BMS main control sends a start instruction to the fire extinguishing module to suppress the thermal diffusion of the battery cells and protect the battery pack.

[0057] The fire extinguishing module is used to respond to the start-up instruction sent by the BMS master control to prevent heat diffusion of the battery cell.

[0058] Among them, the fire extinguishing module can be an aerosol system, which extinguishes the battery cells or battery packs with thermal runaway by spraying aerosol.

[0059] 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.

[0060] The above-mentioned battery pack realizes a comprehensive and accurate judgment on the thermal runaway of the battery cells in the battery pack, and issues a 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 time, thereby effectively suppressing the thermal diffusion of the battery cells in the battery pack and improving the safety performance of the battery pack.

[0061] Furthermore, each battery cell is configured with a signal point, and a signal line is led out from each signal point; the BMS slave board is connected to the signal line through a wiring harness to collect battery cell data of the corresponding battery cell.

[0062] Specifically, each battery cell is configured with a signal point, and a signal line leads out of the signal point. The BMS slave board is connected to the signal line through a wiring harness, and then 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.

[0063] Furthermore, the over-temperature detection module is connected to the signal line through a wiring harness to collect temperature data of the corresponding battery cell.

[0064] Specifically, the over-temperature detection module is connected to the signal line through a wiring harness, and the signal line is transmitted to the over-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.

[0065] 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 over-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 for over-high temperature 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 improved.

[0066] Furthermore, if Figure 2 As shown, it is a schematic diagram of the structure of another battery pack, the battery pack also includes the fire detection module, the fire detection module is communicatively connected with 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.

[0067] 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 detection module drives the fire extinguishing module to perform the fire extinguishing function to prevent the battery pack from catching fire and exploding, and further effectively suppress the thermal diffusion of the battery pack. When the BMS slave board, BMS main control and over-temperature detection module fail, the fire detection module can also detect and effectively suppress the thermal runaway thermal diffusion of the battery pack in time, providing double protection for the battery pack and further improving the safety performance of the battery.

[0068] Furthermore, the battery pack also includes a heat insulating sheet, and the heat insulating sheet is arranged between two adjacent battery cells.

[0069] Specifically, additional heat insulation sheets are added to the battery cell level of the battery pack to prevent thermal runaway from spreading to other battery cells, thereby protecting battery cells that have not experienced thermal runaway. It can be understood that in this embodiment, by providing a heat insulation sheet between two adjacent battery cells, not only can the thermal runaway be prevented from spreading to other battery cells, but also after the fire extinguishing module and the fire detection module are both invalidated, the battery cell that has experienced thermal runaway will not affect other battery cells, thus preventing the thermal runaway from spreading in the battery pack, and providing further protection for the thermal runaway control processing of the battery pack.

[0070] Furthermore, the battery pack also includes a main circuit power-on control module, and the main circuit power-on control module is communicatively connected to the BMS main control.

[0071] Specifically, the battery pack also includes a main circuit power-on control module, which is connected to the BMS main control for controlling the main circuit power-on of the battery pack, including enabling or disabling power-on. When the BMS main control detects that the risk level is greater than or equal to the preset thermal diffusion level, it indicates that the battery pack may have thermal diffusion again. Therefore, it sends a power-on prohibition instruction to the main circuit power-on control module of the battery pack to control the battery pack to stop charging and discharging, thereby realizing the early judgment of thermal runaway of the battery pack and further ensuring the safety performance of the battery pack.

[0072] like Figure 3 As shown, an embodiment of the present application also provides a thermal runaway early warning control method for a battery pack, wherein the battery pack includes a plurality of battery cells, and the method includes:

[0073] 101. Obtain cell data corresponding to each cell;

[0074] 102. Obtain temperature data corresponding to each battery cell;

[0075] 103. Determine the risk level of thermal runaway of each battery cell according to the battery cell data and / or the temperature data;

[0076] 104. If it is detected that the risk level is lower than the preset heat diffusion level, a warning signal corresponding to the risk level is issued;

[0077] 105. 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.

[0078] Specifically, the BMS master control in the battery pack obtains the cell data corresponding to each cell, and obtains the temperature data corresponding to each cell, and then judges the risk level of thermal runaway of each cell based on the cell data and / or temperature data. 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, a fire extinguishing control process is performed on the cell with the risk level greater than or equal to the preset thermal diffusion level to prevent thermal diffusion. This embodiment first obtains the relevant data of the cell, and then obtains the thermal runaway detection according to the relevant data to ensure the accuracy of the detection, and then initiates the corresponding thermal runaway processing measures according to the thermal runaway detection result to ensure the timeliness and effectiveness of the thermal runaway warning control.

[0079] Further, the battery cell data includes battery cell voltage, battery cell temperature and battery cell temperature rise; the risk level of thermal runaway of each battery cell is judged according to the battery cell data and / or the temperature data, including: if the battery cell temperature rise is less than a preset temperature rise threshold, it is judged that the risk level of thermal runaway of the corresponding battery cell is less than a 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 the 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 the 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.

[0080] 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.

[0081] 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 thermal runaway will not occur in the corresponding battery cell. At this time, a 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.

[0082] Furthermore, the method 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.

[0083] Specifically, at least one of the smoke volume, temperature data and gas concentration of the battery pack is obtained, and whether any one of the smoke volume, temperature data and gas concentration is abnormal is detected. 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 thermal runaway of the battery pack.

[0084] Furthermore, the method 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.

[0085] 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.

[0086] like Figure 4 As shown, the 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, the thermal runaway warning control device for a battery pack comprising:

[0087] A first acquisition module 201 is used to acquire cell data corresponding to each cell;

[0088] The second acquisition module 202 is used to acquire temperature data corresponding to each battery cell;

[0089] A judgment module 203 is used to judge the risk level of thermal runaway of each battery cell according to the battery cell data and / or the temperature data;

[0090] The warning module 204 is used to issue a warning signal corresponding to the risk level if it is detected that the risk level is lower than a preset heat diffusion level;

[0091] 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 whose risk level is greater than or equal to the preset heat diffusion level to prevent heat diffusion.

[0092] In one embodiment, the determination module 203 is specifically used for:

[0093] 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;

[0094] 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;

[0095] 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.

[0096] In one embodiment, the thermal runaway warning control device of the battery pack further includes:

[0097] A third acquisition module, used to acquire at least one of the smoke volume, temperature data and gas concentration of the battery pack;

[0098] A detection module, used to detect whether any one of the smoke volume, temperature data and gas concentration is abnormal;

[0099] The processing module is used to perform fire extinguishing control processing on the battery pack if there is an abnormality.

[0100] In one embodiment, the thermal runaway warning control device of the battery pack further includes:

[0101] A collection module, used to collect temperature data of each battery cell in the battery pack;

[0102] The verification module is used to perform temperature verification on the temperature data and the battery cell temperature.

[0103] The embodiment of the present application further provides an electronic device, which integrates any one of the thermal runaway warning control devices for battery packs provided in the embodiment of the present application, and the electronic device includes:

[0104] one or more processors;

[0105] Memory; and

[0106] One or more applications, wherein the one or more applications are stored in the memory and are configured to be executed by the processor in the thermal runaway warning control method for a battery pack as described in any of the above-mentioned embodiments of the thermal runaway warning control method for a battery pack.

[0107] The present application also provides an electronic device that integrates any of the thermal runaway warning control devices for battery packs provided in the present application. Figure 5 As shown, it shows a schematic diagram of the structure of the electronic device involved in the embodiment of the present application, specifically:

[0108] 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 Figure 5 The electronic device structure shown in the figure does not constitute a limitation on the electronic device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0109] The processor 301 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 302, and calling data stored in the memory 302, it executes 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 mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 301.

[0110] The memory 302 can be used to store software programs and modules. The processor 301 executes various functional applications and data processing by running the software programs and modules stored in the memory 302. The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 302 may also include a memory controller to provide the processor 301 with access to the memory 302.

[0111] The electronic device also includes a power supply 303 for supplying power to each component. Preferably, the power supply 303 can be logically connected to the processor 301 through a power management system, so that the power management system can manage charging, discharging, power consumption and other functions. The power supply 303 can also include one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, power status indicators and other arbitrary components.

[0112] The electronic device may further include an input unit 304, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0113] Although not shown, the electronic device may further include a display unit, etc., which will not be described in detail herein. 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, thereby realizing various functions, as follows:

[0114] Get the cell data corresponding to each cell;

[0115] Get the temperature data corresponding to each battery cell;

[0116] Determining the risk level of thermal runaway of each battery cell according to the battery cell data and / or the temperature data;

[0117] 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;

[0118] 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.

[0119] A person of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed 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.

[0120] To this end, an embodiment of the present application provides a computer-readable storage medium, which may include: a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc. A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in any of the thermal runaway warning control methods for battery packs provided in the embodiments of the present application. For example, the computer program may be loaded by a processor to execute the following steps:

[0121] Get the cell data corresponding to each cell;

[0122] Get the temperature data corresponding to each battery cell;

[0123] Determining the risk level of thermal runaway of each battery cell according to the battery cell data and / or the temperature data;

[0124] 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;

[0125] 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.

[0126] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above, and will not be repeated here.

[0127] In specific implementation, the above units or structures can be implemented as independent entities, or can be arbitrarily combined to be implemented as the same or several entities. The specific implementation of the above units or structures can refer to the previous method embodiments, which will not be repeated here.

[0128] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery pack, characterized in that: include: A plurality of battery cells, a BMS slave board, a BMS master control, an over-temperature detection module and a fire extinguishing module, wherein the BMS slave board, the over-temperature detection module and the fire extinguishing module are respectively connected to the BMS master control for communication; The BMS slave board is connected to each battery cell for collecting battery cell data corresponding to each battery cell and sending the battery cell data to the BMS master control, wherein the battery cell data includes battery cell temperature; The over-temperature detection module is connected to each battery cell, and is used to collect temperature data corresponding to each battery cell, and send the temperature data to the BMS master control; The BMS master is used to verify the battery cell temperature and temperature data, obtain the temperature verification result, and determine the risk level of thermal runaway of each battery cell based on the temperature verification result and the battery cell data; The fire extinguishing module is used to respond to the start-up command sent by the BMS master to prevent heat diffusion in the battery cell; The battery pack further comprises a fire detection module, and the fire detection module is communicatively connected with the fire extinguishing module; 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; The battery pack further comprises a main circuit power-on control module, and the main circuit power-on control module is communicatively connected with the BMS main control.

2. The battery pack according to claim 1, characterized in that: Each of the 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 to collect cell data of the corresponding cell.

3. The battery pack according to claim 2, characterized in that: The over-temperature detection module is connected to the signal line through a wiring harness and is used to collect temperature data of the corresponding battery cell.

4. The battery pack according to claim 1, characterized in that: The fire detection module includes at least one of a smoke detector, a smoke sensor and a temperature sensor.

5. The battery pack according to any one of claims 1 to 4, characterized in that: The battery pack further comprises a heat insulating sheet, which is arranged between two adjacent battery cells.

6. A thermal runaway early warning control method for a battery pack according to any one of claims 1 to 5, characterized in that: The thermal runaway early warning control method comprises: Obtaining cell data corresponding to each cell, wherein the cell data includes cell temperature; Get the temperature data corresponding to each battery cell; According to the battery cell data and / or the temperature data, determining the risk level of thermal runaway of each battery cell, including: performing temperature verification on the temperature data and the battery cell temperature; Determine the risk level of thermal runaway of each battery cell based on the temperature verification result and the battery cell 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.

7. The thermal runaway early warning control method according to claim 6, characterized in that: The battery cell data includes battery cell voltage, battery cell temperature and battery cell temperature rise; The step of judging 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.

8. The thermal runaway early warning control method according to claim 6, characterized in that: Also includes: 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.

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