Fire protection method and device for battery cell, electronic equipment, storage medium and program product

Abstract

The embodiment of the invention provides a fire protection method and device for a battery cell, electronic equipment, a storage medium and a program product. Relates to the technical field of energy storage system fire fighting. The method comprises the following steps: detecting a target value of a target position of a battery cell in a preset battery assembly; wherein the target value represents an index value of the health degree of the battery cell. The target value is compared with a preset threshold value, and a spraying mode is determined; wherein the spraying mode is used for indicating fire-fighting spraying information; the spraying mode comprises a thermal abnormal mode and / or a thermal runaway mode. If it is determined that the spraying mode is the thermal abnormal mode, spraying preset inert gas to the battery module where the target position is located; or, if it is determined that the spraying mode is the thermal runaway mode, preset perfluorohexanone is sprayed to the battery module where the target position is located, and after it is detected that perfluorohexanone spraying is completed, inert gas is sprayed to the battery module where the target position is located. The method is used for achieving the effect of improving the safety degree of the battery cell during thermal runaway.

Description

Technical Field

[0001] The present application relates to the field of fire protection technology for energy storage systems, and in particular to a method, device, electronic equipment, storage medium and program product for fire protection of a battery cell. Background Art

[0002] At present, the BMS battery system is commonly known as the battery nanny or battery butler, which is mainly used to intelligently manage and maintain each battery cell unit, monitor the status of the battery cell, prevent the battery cell from overcharging and over-discharging, and extend the service life of the battery cell. Therefore, it is necessary to carry out fire protection for the battery cell based on the BMS battery system.

[0003] In the prior art, the existing fire protection method for energy storage battery prefabricated cabins is a fire detection tube fire extinguishing device method in a PACK-level battery pack. In this method, a fire detection tube fire extinguishing device is arranged in the battery pack. When the battery cell thermal runaway causes the temperature to reach the working temperature of the fire detection tube, the fire suppressant in the fire detection tube is released to play a role in extinguishing the fire.

[0004] However, in the prior art, since the dosage of the fire suppressant in the fire-detecting tube fire-extinguishing device in the PACK-level battery pack is small, the thermal runaway of the battery cell cannot be effectively suppressed, resulting in a low safety level when the battery cell thermal runaway occurs. Summary of the invention

[0005] The embodiments of the present application provide a fire protection method, device, electronic device, storage medium and program product for a battery cell, so as to achieve the effect of improving the safety of the battery cell during thermal runaway.

[0006] In a first aspect, an embodiment of the present application provides a fire protection method for a battery cell, comprising:

[0007] Detecting a target value of a target position of a battery cell in a preset battery assembly; wherein the target value represents an index value of the health of the battery cell;

[0008] Comparing the target value with a preset threshold value to determine a spraying mode; wherein the spraying mode is used to indicate fire spraying information; the spraying mode includes a thermal anomaly mode and / or a thermal runaway mode;

[0009] If it is determined that the spraying mode is a thermal abnormality mode, the preset inert gas is sprayed toward the battery module where the target position is located; or, if it is determined that the spraying mode is a thermal runaway mode, the preset perfluorohexanone is sprayed toward the battery module where the target position is located, and after detecting that the spraying of the perfluorohexanone is completed, the inert gas is sprayed toward the battery module where the target position is located.

[0010] In a possible implementation, a plurality of battery cells form a battery module, and a plurality of the battery modules form a battery cluster; each battery cluster corresponds to a battery cluster sub-control valve; and the battery assembly is provided with n battery clusters, where n is a positive integer greater than or equal to 1.

[0011] In a possible implementation, if it is determined that the spraying mode is a thermal runaway mode, the preset perfluorohexanone is sprayed toward the battery module where the target position is located, and after it is detected that the spraying of the perfluorohexanone is completed, the inert gas is sprayed toward the battery module, including:

[0012] If it is determined that the spraying mode is a thermal runaway mode, the target battery cluster sub-control valve corresponding to the battery module at the target position is opened, and the preset perfluorohexanone is sprayed to the battery module at the target position and other battery modules in the battery cluster where the battery module at the target position is located through the target battery cluster sub-control valve;

[0013] After it is detected that the spraying of the perfluorohexanone is completed, the inert gas is sprayed toward the battery module at the target position and other battery modules in the battery cluster where the battery module at the target position is located.

[0014] In a possible implementation manner, each of the battery modules corresponds to a sub-control solenoid valve; if it is determined that the spraying mode is a thermal runaway mode, the preset perfluorohexanone is sprayed to the battery module at the target position, and after it is detected that the spraying of the perfluorohexanone is completed, the inert gas is sprayed to the battery module, including:

[0015] If it is determined that the spraying mode is the thermal runaway mode, the target battery cluster sub-control valve corresponding to the battery module at the target position and the target sub-control solenoid valve under the target battery cluster sub-control valve are opened, and the preset perfluorohexanone is sprayed to the battery module at the target position through the target battery cluster sub-control valve and the target sub-control solenoid valve;

[0016] After it is detected that the spraying of the perfluorohexanone is complete, the inert gas is sprayed toward the battery module at the target position.

[0017] In a possible embodiment, the battery assembly is provided with an inert gas pipeline and a perfluorohexanone pipeline in a common pipeline; the inert gas pipeline is connected to a preset gas production equipment, and the perfluorohexanone pipeline is connected to a preset perfluorohexanone providing equipment; the inert gas pipeline is provided with a first solenoid valve, and the perfluorohexanone pipeline is provided with a second solenoid valve; the first solenoid valve is used to control the opening or closing of the inert gas pipeline, and the second solenoid valve is used to control the opening or closing of the perfluorohexanone pipeline.

[0018] In a possible implementation, if it is determined that the spraying mode is a thermal runaway mode, spraying a preset perfluorohexanone onto the battery module at the target position, and after detecting that the spraying of the perfluorohexanone is completed, spraying the inert gas onto the battery module, comprising:

[0019] If it is determined that the spraying mode is the thermal runaway mode, opening the second solenoid valve to spray the perfluorohexanone in the perfluorohexanone gas tank toward the battery module at the target position;

[0020] After it is detected that the spraying of the perfluorohexanone is complete, the first solenoid valve is opened to spray the inert gas generated by the gas production equipment toward the battery module at the target position.

[0021] In a possible implementation, if it is determined that the spraying mode is a thermal abnormality mode, spraying a preset inert gas toward the battery module where the target position is located includes:

[0022] If it is determined that the spraying mode is the thermal abnormality mode, the first solenoid valve is opened to spray the inert gas toward the battery module where the target position is located.

[0023] In a possible implementation manner, the target position is the battery cell, or a strain gauge at an explosion-proof valve of the battery cell; comparing the target value with a preset threshold value to determine a spraying mode includes:

[0024] If the target value is the temperature value of the battery cell, when it is determined that the temperature value is greater than a preset first thermal threshold, the spraying mode is determined to be a thermal abnormality mode; when it is determined that the temperature value is greater than a preset second thermal threshold, the spraying mode is determined to be a thermal runaway mode;

[0025] Alternatively, if the target value is the deformation of the explosion-proof valve sensed by the strain gauge, when it is determined that the deformation is greater than a preset first deformation threshold, the spraying mode is determined to be a thermal abnormality mode; when it is determined that the deformation is greater than a preset second deformation threshold, the spraying mode is determined to be a thermal runaway mode.

[0026] In a second aspect, an embodiment of the present application provides a fire protection device for a battery cell, comprising:

[0027] An acquisition module is used to detect a target value of a target position of a battery cell in a preset battery assembly; wherein the target value represents an index value of the health of the battery cell;

[0028] A determination module, used to compare the target value with a preset threshold value to determine a spraying mode; wherein the spraying mode is used to indicate fire spraying information; the spraying mode includes a thermal anomaly mode and / or a thermal runaway mode;

[0029] a first spraying module, configured to spray a preset inert gas toward the battery module at the target position if the spraying mode is determined to be a thermal abnormality mode; or

[0030] The second spraying module is used to spray the preset perfluorohexanone to the battery module at the target position if it is determined that the spraying mode is a thermal runaway mode, and spray the inert gas to the battery module at the target position after detecting that the spraying of the perfluorohexanone is completed.

[0031] In a possible implementation, a plurality of battery cells form a battery module, and a plurality of the battery modules form a battery cluster; each battery cluster corresponds to a battery cluster sub-control valve; and the battery assembly is provided with n battery clusters, where n is a positive integer greater than or equal to 1.

[0032] In a possible implementation manner, the second spraying module is specifically used to:

[0033] If it is determined that the spraying mode is a thermal runaway mode, the target battery cluster sub-control valve corresponding to the battery module at the target position is opened, and the preset perfluorohexanone is sprayed to the battery module at the target position and other battery modules in the battery cluster where the battery module at the target position is located through the target battery cluster sub-control valve;

[0034] After it is detected that the spraying of the perfluorohexanone is completed, the inert gas is sprayed toward the battery module at the target position and other battery modules in the battery cluster where the battery module at the target position is located.

[0035] In a possible implementation manner, each of the battery modules corresponds to a sub-control solenoid valve; the second spraying module is specifically used for:

[0036] If it is determined that the spraying mode is the thermal runaway mode, the target battery cluster sub-control valve corresponding to the battery module at the target position and the target sub-control solenoid valve under the target battery cluster sub-control valve are opened, and the preset perfluorohexanone is sprayed to the battery module at the target position through the target battery cluster sub-control valve and the target sub-control solenoid valve;

[0037] After it is detected that the spraying of the perfluorohexanone is complete, the inert gas is sprayed toward the battery module at the target position.

[0038] In a possible embodiment, the battery assembly is provided with an inert gas pipeline and a perfluorohexanone pipeline in a common pipeline; the inert gas pipeline is connected to a preset gas production equipment, and the perfluorohexanone pipeline is connected to a preset perfluorohexanone providing equipment; the inert gas pipeline is provided with a first solenoid valve, and the perfluorohexanone pipeline is provided with a second solenoid valve; the first solenoid valve is used to control the opening or closing of the inert gas pipeline, and the second solenoid valve is used to control the opening or closing of the perfluorohexanone pipeline.

[0039] In a possible implementation manner, the second spraying module is specifically used to:

[0040] If it is determined that the spraying mode is the thermal runaway mode, opening the second solenoid valve to spray the perfluorohexanone in the perfluorohexanone gas tank toward the battery module at the target position;

[0041] After it is detected that the spraying of the perfluorohexanone is complete, the first solenoid valve is opened to spray the inert gas generated by the gas production equipment toward the battery module at the target position.

[0042] In a possible implementation manner, the first spraying module is specifically used to:

[0043] If it is determined that the spraying mode is the thermal abnormality mode, the first solenoid valve is opened to spray the inert gas toward the battery module where the target position is located.

[0044] In a possible implementation manner, the target position is the battery cell, or a strain gauge at an explosion-proof valve of the battery cell; and the determination module is specifically configured to:

[0045] If the target value is the temperature value of the battery cell, when it is determined that the temperature value is greater than a preset first thermal threshold, the spraying mode is determined to be a thermal abnormality mode; when it is determined that the temperature value is greater than a preset second thermal threshold, the spraying mode is determined to be a thermal runaway mode;

[0046] Alternatively, if the target value is the deformation of the explosion-proof valve sensed by the strain gauge, when it is determined that the deformation is greater than a preset first deformation threshold, the spraying mode is determined to be a thermal abnormality mode; when it is determined that the deformation is greater than a preset second deformation threshold, the spraying mode is determined to be a thermal runaway mode.

[0047] In a third aspect, an embodiment of the present application provides an electronic device, including: a memory, a processor;

[0048] The memory stores computer-executable instructions;

[0049] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the above first aspect and / or various possible implementations of the first aspect.

[0050] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the first aspect above and / or various possible implementations of the first aspect.

[0051] In a fifth aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the above first aspect and / or various possible implementation methods of the first aspect.

[0052] The fire protection method, device, electronic device, storage medium and program product of the battery cell provided in the embodiment of the present application detect the target value of the target position of the battery cell in the preset battery assembly; wherein the target value represents the index value of the health of the battery cell. The target value is compared with the preset threshold value to determine the spraying mode; wherein the spraying mode is used to indicate the fire spraying information; the spraying mode includes a thermal anomaly mode and / or a thermal runaway mode. If the spraying mode is determined to be a thermal anomaly mode, the preset inert gas is sprayed to the battery module where the target position is located; or, if the spraying mode is determined to be a thermal runaway mode, the preset perfluorohexanone is sprayed to the battery module where the target position is located, and after detecting that the perfluorohexanone has been sprayed, the inert gas is sprayed to the battery module where the target position is located. In this scheme, when it is detected that the temperature anomaly reaches an abnormal state, an inert gas is used for fire fighting, and when the temperature exceeds the abnormality and reaches an out-of-control state, perfluorohexanone is used for fire fighting, and the inert gas continues to be sprayed after the perfluorohexanone is released. Therefore, combined with perfluorohexanone fire extinguishing, it can achieve accurate and rapid fire extinguishing and cooling protection effects, can quickly cool down and isolate oxygen, quickly and effectively control the thermal runaway state of the battery, and then can provide comprehensive protection before, during and after thermal runaway, improve the safety of battery fire fighting, and achieve the effect of improving the safety of battery cells during thermal runaway. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0054] Figure 1 A schematic diagram of a fire protection method for a battery cell provided in an embodiment of the present application Figure 1 ;

[0055] Figure 2 A schematic diagram of another fire protection method for a battery cell provided in an embodiment of the present application Figure 2 ;

[0056] Figure 3 A circuit diagram of a fire protection method for a battery cell provided in this application;

[0057] Figure 4 A schematic structural diagram of a fire protection device for a battery cell provided in an embodiment of the present application;

[0058] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0059] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0060] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0061] At present, the BMS battery system is commonly known as the battery nanny or battery butler, which is mainly used to intelligently manage and maintain each battery cell unit, monitor the status of the battery cell, prevent the battery cell from overcharging and over-discharging, and extend the service life of the battery cell. Therefore, it is necessary to carry out fire protection for the battery cell based on the BMS battery system.

[0062] In one example, the existing fire protection method for energy storage battery prefabricated cabins is a fire-detecting tube fire-extinguishing device in a PACK-level battery pack. In this method, a fire-detecting tube fire-extinguishing device is installed in the battery pack. When the battery cell thermal runaway causes the temperature to reach the fire-detecting tube action temperature, the fire suppressant in the fire-detecting tube is released to extinguish the fire. However, in the prior art, due to the small dosage of the fire suppressant in the fire-detecting tube fire-extinguishing device in the PACK-level battery pack, the thermal runaway of the battery cell cannot be effectively suppressed, resulting in a low safety level when the battery cell thermal runaway occurs.

[0063] In one example, the existing fire protection methods for energy storage battery prefabricated cabins include an in-pack fire detector method, which detects thermal runaway information by installing a fire detector in the battery pack. Once the detector detects thermal runaway, the fire extinguishing system is activated, and the fire extinguishing agent is sprayed into the corresponding battery pack through the nozzle to extinguish the fire. However, the detector in the battery pack is installed on the front inspection panel of the battery pack, and the detection range is limited, which is prone to false alarms.

[0064] In one example, the existing fire protection methods for prefabricated cabins of energy storage batteries include a cabin roof detector method, which installs temperature, smoke and combustible gas detectors on the top of the prefabricated cabin. When these detectors detect a fire signal, the fire extinguishing system is activated to fully flood the entire cabin. However, the cabin-level spraying of fire extinguishing agents cannot effectively control thermal runaway in the early stages of battery thermal runaway, and cannot accurately find the location of thermal runaway. In one example, the existing fire protection methods for prefabricated cabins of energy storage batteries include a battery pack gas fire sprinkler method, which sets a gas fire sprinkler on the battery pack. When thermal runaway occurs, perfluorohexanone is sprayed into the battery pack through the sprinkler to extinguish the fire. However, the fire sprinkler can only be connected to a gas fire quick plug-in, which is greatly affected by the system pressure, and the battery pack is only installed with the male part of the sprinkler, and the female part is difficult to match.

[0065] In combination with the above scenarios, it can be seen that in the prior art, there is a technical problem of low safety when the battery thermal runaway occurs.

[0066] The fire protection method for the battery cell provided in the present application uses perfluorohexanone for fire fighting when it is detected that the temperature exceeds the abnormal state and reaches the out-of-control state, and continues to spray the inert gas after the release of perfluorohexanone is completed, thereby solving the technical problem of low safety level during thermal runaway of the battery.

[0067] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0068] Figure 1 A schematic diagram of a fire protection method for a battery cell provided in this application Figure 1 ,like Figure 1 As shown, the method includes:

[0069] S101, detecting a target value of a target position of a battery cell in a preset battery assembly; wherein the target value represents an index value of health of the battery cell.

[0070] For example, the execution subject of this embodiment may be an electronic device, or a terminal device, or a fire protection device or device of a battery cell, a fire protection system of a battery cell, or other devices or equipment that can execute this embodiment, and there is no limitation on this. In this embodiment, the execution subject is introduced as an electronic device.

[0071] First, a battery management system (BMS) is deployed in the electronic device; multiple battery cells are connected in series to form a battery module (i.e., PACK), and multiple battery modules are connected in series to form a battery cluster; multiple battery clusters are connected in parallel to form a battery assembly, i.e., a battery PACK package. Each battery cluster corresponds to a battery cluster sub-control valve. Furthermore, each battery module can also correspond to a sub-control solenoid valve. The battery assembly is provided with n battery clusters, i.e., there are n battery cluster sub-control valves, where n is a positive integer greater than or equal to 1.

[0072] In this step, the target value of the target position of each battery cell in the preset battery assembly is detected. The target value represents the index value of the health of the battery cell; the target position can be the battery cell itself, or the strain gauge at the explosion-proof valve of the battery cell, that is, the target value can be the temperature value of the battery cell, or the deformation degree of the strain gauge.

[0073] S102. Compare the target value with a preset threshold value to determine a spraying mode; wherein the spraying mode is used to indicate fire spraying information; the spraying mode includes a thermal anomaly mode and / or a thermal runaway mode.

[0074] Exemplarily, the spray mode is used to indicate fire spray information, that is, spray indication information of target fire operations in different modes. The target value is compared with a preset threshold value. If the target value is the temperature value of the battery cell, when it is determined that the temperature value is greater than the preset first threshold value T1, the spray mode is determined to be a thermal abnormality mode; when it is determined that the temperature value is greater than the preset second threshold value T2, the spray mode is determined to be a thermal runaway mode.

[0075] Alternatively, if the target value is the deformation of the explosion-proof valve sensed by the strain gauge, when it is determined that the deformation is greater than a preset first deformation threshold value T3, the spraying mode is determined to be a thermal abnormality mode; when it is determined that the deformation is greater than a preset second deformation threshold value T4, the spraying mode is determined to be a thermal runaway mode. Wherein, T2 is greater than T1, and T4 is greater than T3.

[0076] S103. If it is determined that the spraying mode is a thermal abnormality mode, the preset inert gas is sprayed toward the battery module at the target position; or, if it is determined that the spraying mode is a thermal runaway mode, the preset perfluorohexanone is sprayed toward the battery module at the target position, and after it is detected that the spraying of the perfluorohexanone is completed, the inert gas is sprayed toward the battery module at the target position.

[0077] Exemplarily, if the spraying mode is determined to be a thermal anomaly mode, the preset inert gas is directly sprayed to the battery module at the target position. Alternatively, if the spraying mode is determined to be a thermal runaway mode, the pre-stored perfluorohexanone is sprayed to the battery module at the target position. After detecting that all the stored perfluorohexanone has been sprayed, the pre-stored inert gas is continuously sprayed to the battery module at the target position until it is determined that the battery corresponding to the target position is updated to a battery in a new healthy state, and then the spraying of the inert gas is stopped.

[0078] Among them, the inert gas can be nitrogen, carbon dioxide, etc., without limitation. In addition to perfluorohexanone, other fire-fighting media such as water firefighting, aerosols, etc. can also be sprayed in thermal anomaly mode and / or thermal runaway mode, without limitation. Taking nitrogen as an example of inert gas, nitrogen can be stored in nitrogen tanks; alternatively, the inert gas can be produced by molecular sieve nitrogen production equipment or membrane separation to produce dry nitrogen as an inert gas and to avoid condensation of water vapor inside the PACK and corrosion of electrical components; using a nitrogen production equipment to continuously produce nitrogen is low-cost and eliminates the need for nitrogen tank maintenance. In addition, nitrogen will not cause any negative effects, and can avoid adverse consequences caused by accidental touch.

[0079] Therefore, the battery cell temperature can be detected in real time at all temperatures to determine various states such as normal / thermal abnormality / thermal runaway. When it is determined that the battery cell is thermally abnormal but has not yet reached the thermal runaway state, nitrogen is injected to enter the protection state. When the temperature reaches thermal runaway, it is switched to perfluorohexanone, and then switched back to nitrogen after the release of perfluorohexanone is completed. This can provide comprehensive protection before, during and after thermal runaway, thereby improving the safety of battery fire protection.

[0080] The fire protection method for the battery cell provided in the embodiment of the present application detects the target value of the target position of the battery cell in the preset battery assembly; wherein the target value represents the index value of the health of the battery cell. The target value is compared with the preset threshold value to determine the spraying mode; wherein the spraying mode is used to indicate the fire spraying information; the spraying mode includes a thermal anomaly mode and / or a thermal runaway mode. If the spraying mode is determined to be a thermal anomaly mode, the preset inert gas is sprayed to the battery module where the target position is located; or, if the spraying mode is determined to be a thermal runaway mode, the preset perfluorohexanone is sprayed to the battery module where the target position is located, and after detecting that the perfluorohexanone has been sprayed, the inert gas is sprayed to the battery module where the target position is located. In this scheme, when it is detected that the temperature anomaly reaches an abnormal state, an inert gas is used for fire fighting, and when the temperature exceeds the abnormality and reaches an out-of-control state, perfluorohexanone is used for fire fighting, and the inert gas continues to be sprayed after the perfluorohexanone is released. Therefore, combined with perfluorohexanone fire extinguishing, it can achieve accurate and rapid fire extinguishing and cooling protection effects, can quickly cool down and isolate oxygen, quickly and effectively control the thermal runaway state of the battery, and then can provide comprehensive protection before, during and after thermal runaway, improve the safety of battery fire fighting, and achieve the effect of improving the safety of battery cells during thermal runaway.

[0081] Figure 2 A schematic diagram of a fire protection method for a battery cell provided in this application Figure 2 ,like Figure 2 As shown, in this embodiment Figure 1 Based on the embodiment, a fire protection method for a battery cell is described in detail, and the method includes:

[0082] S201, detecting a target value of a target position of a battery cell in a preset battery assembly; wherein the target value represents an index value of health of the battery cell.

[0083] For example, this step can be referred to Figure 1 Step 101 in the above is not described in detail.

[0084] S202. Compare the target value with a preset threshold value to determine a spraying mode; wherein the spraying mode is used to indicate fire spraying information; the spraying mode includes a thermal anomaly mode and / or a thermal runaway mode.

[0085] In one example, S202 includes: the target position is a battery cell, or a strain gauge at an explosion-proof valve of the battery cell; if the target value is a temperature value of the battery cell, when it is determined that the temperature value is greater than a preset first thermal threshold, the spraying mode is determined to be a thermal abnormality mode; when it is determined that the temperature value is greater than a preset second thermal threshold, the spraying mode is determined to be a thermal runaway mode;

[0086] Alternatively, if the target value is the deformation of the explosion-proof valve sensed by the strain gauge, when it is determined that the deformation is greater than a preset first deformation threshold, the spraying mode is determined to be a thermal abnormality mode; when it is determined that the deformation is greater than a preset second deformation threshold, the spraying mode is determined to be a thermal runaway mode.

[0087] Exemplarily, the spraying mode is used to indicate fire spraying information, that is, spraying instruction information of target fire fighting operations in different modes. The target value is compared with the preset threshold value. If the target position is a battery cell and the target value is the temperature value of the battery cell itself, when it is determined that the temperature value is greater than the preset first threshold value T1, the spraying mode is determined to be a thermal abnormality mode; when it is determined that the temperature value is greater than the preset second threshold value T2, the spraying mode is determined to be a thermal runaway mode.

[0088] Alternatively, if the target position is the strain gauge at the explosion-proof valve of the battery cell, and the target value is the deformation of the explosion-proof valve sensed by the strain gauge, when it is determined that the deformation is greater than the preset first deformation threshold T3, the spraying mode is determined to be the thermal abnormality mode; when it is determined that the deformation is greater than the preset second deformation threshold T4, the spraying mode is determined to be the thermal runaway mode. Wherein, T2 is greater than T1, and T4 is greater than T3.

[0089] S203: If it is determined that the spraying mode is the thermal abnormality mode, spray the preset inert gas toward the battery module at the target position.

[0090] In one example, a battery assembly is provided with an inert gas pipeline and a perfluorohexanone pipeline with a common pipeline; the inert gas pipeline is connected to a preset gas production equipment, and the perfluorohexanone pipeline is connected to a preset perfluorohexanone supply equipment; the inert gas pipeline is provided with a first solenoid valve, and the perfluorohexanone pipeline is provided with a second solenoid valve; the first solenoid valve is used to control the opening or closing of the inert gas pipeline, and the second solenoid valve is used to control the opening or closing of the perfluorohexanone pipeline.

[0091] In one example, S203 includes: if it is determined that the spraying mode is the thermal abnormality mode, opening the first solenoid valve to spray the inert gas toward the target position.

[0092] Exemplarily, the battery assembly is provided with a common inert gas pipeline and a perfluorohexanone pipeline. Figure 3 A circuit diagram of a fire protection method for a battery cell provided in this application, such as Figure 3As shown, perfluorohexanone providing equipment (taking perfluorohexanone gas tank as an example), gas production equipment (taking nitrogen production device as an example), the first solenoid valve A, the second solenoid valve B, the inert gas pipeline where the first solenoid valve A is located, the perfluorohexanone pipeline where the second solenoid valve B is located, the inert gas pipeline is connected to the preset gas production equipment, the perfluorohexanone pipeline is connected to the preset perfluorohexanone providing equipment, the first solenoid valve is used to control the opening or closing of the inert gas pipeline, and the second solenoid valve is used to control the opening or closing of the perfluorohexanone pipeline. If it is determined that the spraying mode is a thermal abnormality mode, the electronic device opens the preset first solenoid valve and sprays the inert gas to the target position. During the spraying process, the change of the temperature value is detected in real time. If it is determined that the temperature value is restored to a temperature value less than T1, the first solenoid valve A is cut off and the gas production equipment is closed. Among them, the inert gas can be nitrogen, carbon dioxide, etc., which is not limited to this.

[0093] Therefore, under abnormal thermal conditions, only inert gases such as nitrogen are used as inertization protection. Inert gases can isolate oxygen and avoid problems such as short-circuit oxidation.

[0094] S204: If it is determined that the spraying mode is the thermal runaway mode, the preset perfluorohexanone is sprayed onto the battery module at the target position, and after it is detected that the spraying of the perfluorohexanone is completed, an inert gas is sprayed onto the battery module.

[0095] In one example, multiple battery cells form a battery module, and multiple battery modules form a battery cluster; each battery cluster corresponds to a battery cluster sub-control valve; the battery assembly is provided with n battery clusters, where n is a positive integer greater than or equal to 1.

[0096] In one example, step 203 includes multiple implementations:

[0097] A first implementation method of step 204: if it is determined that the spraying mode is the thermal runaway mode, the target battery cluster sub-control valve corresponding to the battery module at the target position is opened, and the preset perfluorohexanone is sprayed to the battery module at the target position and other battery modules in the battery cluster where the battery module at the target position is located through the target battery cluster sub-control valve; after it is detected that the spraying of perfluorohexanone is completed, an inert gas is sprayed to the battery module at the target position and other battery modules in the battery cluster where the battery module at the target position is located.

[0098] A second implementation of step 204: each battery module corresponds to a sub-control solenoid valve; if it is determined that the spraying mode is the thermal runaway mode, the target battery cluster sub-control valve corresponding to the battery module at the target position and the target sub-control solenoid valve under the target battery cluster sub-control valve are opened, and the preset perfluorohexanone is sprayed to the battery module at the target position through the target battery cluster sub-control valve and the target sub-control solenoid valve; after it is detected that the spraying of perfluorohexanone is completed, an inert gas is sprayed to the battery module at the target position.

[0099] The third implementation method of step 204: if it is determined that the spraying mode is the thermal runaway mode, the second solenoid valve is opened to spray the perfluorohexanone in the perfluorohexanone gas tank toward the battery module at the target position; after detecting that the spraying of the perfluorohexanone is completed, the first solenoid valve is opened to spray the inert gas generated by the gas production equipment toward the battery module at the target position.

[0100] For example, Figure 3 As shown, it includes: perfluorohexanone providing equipment (taking perfluorohexanone gas tank as an example), gas production equipment (taking nitrogen production device as an example), a first solenoid valve A, a second solenoid valve B, n battery clusters (reference Figure 3 The dashed box in the figure is a battery cluster), and n battery cluster sub-control valves. The battery signal of each PACK is obtained. If the spraying mode is determined to be the thermal runaway mode according to the battery signal of the PACK, the electronic device sprays the perfluorohexanone stored in the perfluorohexanone gas tank to the battery module at the target position, and after detecting that the stored perfluorohexanone has been sprayed, the inert gas produced by the gas production equipment is continuously sprayed to the battery module at the target position until it is determined that the battery corresponding to the target position is updated to a battery in a new healthy state, and then the spraying of the inert gas is stopped. Among them, the battery signal can be the temperature signal of the battery cell, that is, the temperature value; it can also be the deformation degree of the explosion-proof valve, which is not limited.

[0101] Specifically, in the first implementation, Figure 3 As shown, if the spraying mode is determined to be the thermal runaway mode, the second solenoid valve B and the sub-control valve of the target battery cluster corresponding to the battery module at the target position are opened, and the perfluorohexanone in the perfluorohexanone gas tank is sprayed to the battery module at the target position and other battery modules in the battery cluster where the battery module at the target position is located through the second solenoid valve B and the sub-control valve of the target battery cluster, that is, perfluorohexanone is flushed into all PACKs corresponding to the battery cluster for fire protection. After it is detected that the stored perfluorohexanone has been sprayed, inert gas is sprayed to the battery module at the target position and other battery modules in the battery cluster where the battery module at the target position is located.

[0102] In the second implementation, Figure 3As shown, each battery module (i.e., PACK1…n) corresponds to a sub-control solenoid valve. If the spraying mode is determined to be a thermal runaway mode, the second solenoid valve B, the target battery cluster sub-control valve corresponding to the battery module at the target position, and the target sub-control solenoid valve under the target battery cluster sub-control valve are opened, and perfluorohexanone is sprayed to the battery module at the target position through the second solenoid valve B, the target battery cluster sub-control valve and the target sub-control solenoid valve. After detecting that the spraying of perfluorohexanone is complete, an inert gas is sprayed to the battery module at the target position. Therefore, a separate sub-control solenoid valve is set for each PACK, and when the PACK is in an abnormal state, an inert gas or perfluorohexanone can be injected into the PACK separately, making the battery cell fire protection more effective and accurate.

[0103] In the third implementation, Figure 3 As shown, the battery assembly is provided with an inert gas pipeline and a perfluorohexanone pipeline of a common pipeline; the inert gas pipeline is connected to the gas production equipment, and the perfluorohexanone pipeline is connected to the preset perfluorohexanone providing equipment; the inert gas pipeline is provided with a first solenoid valve A, and the perfluorohexanone pipeline is provided with a second solenoid valve B. If it is determined that the spraying mode is the thermal runaway mode, the second solenoid valve B is opened to spray the perfluorohexanone in the perfluorohexanone gas tank to the battery module at the target position. After detecting that the perfluorohexanone has been sprayed, the second solenoid valve B is closed, the first solenoid valve A is opened, and the inert gas pipeline is reconnected to spray the inert gas generated by the gas production equipment to the battery module at the target position, and the inert gas is continuously flushed in for protection. Therefore, since the additional nitrogen pipeline can be connected in parallel with the perfluorohexanone pipeline to form a set of fire protection pipes, there will be no leakage at the joints such as the quick-connect gas nozzle, and even if there is a leak, it will not cause any negative impact.

[0104] Alternatively, in addition to the above three methods, if the current mode changes from thermal abnormality mode to thermal runaway mode, the first solenoid valve A is closed, the second solenoid valve B is opened, and the perfluorohexanone protection device of the fire protection system is started, that is, the perfluorohexanone in the perfluorohexanone gas tank is sprayed toward the battery module at the target position, and after detecting that the spraying of the perfluorohexanone is completed, the second solenoid valve B is closed, the first solenoid valve A is opened, the inert gas pipeline is reconnected, and the inert gas generated by the gas production equipment is sprayed toward the battery module at the target position.

[0105] The fire protection method of the battery cell provided in the embodiment of the present application detects the target value of the target position of the battery cell in the preset battery assembly; wherein the target value represents the index value of the health of the battery cell. The target value is compared with the preset threshold value to determine the spraying mode; wherein the spraying mode is used to indicate the fire spraying information; the spraying mode includes a thermal abnormality mode and / or a thermal runaway mode. If the spraying mode is determined to be a thermal abnormality mode, the preset inert gas is sprayed to the battery module where the target position is located. If the spraying mode is determined to be a thermal runaway mode, the preset perfluorohexanone is sprayed to the battery module where the target position is located, and after detecting that the perfluorohexanone has been sprayed, the inert gas is sprayed to the battery module. Therefore, combined with perfluorohexanone fire extinguishing, a precise and rapid fire extinguishing and cooling protection effect can be achieved, which can quickly cool down and isolate oxygen, quickly and effectively control the thermal runaway state of the battery, and then can be fully protected before, during and after the thermal runaway, and the safety of the battery fire protection is improved, so as to achieve the effect of improving the safety of the battery cell during thermal runaway.

[0106] Figure 4 A schematic diagram of the structure of a fire protection device for a battery cell provided in this application, such as Figure 4 As shown, the fire protection device 30 of the battery cell provided in this embodiment includes:

[0107] An acquisition module 31 is used to detect a target value of a target position of a battery cell in a preset battery assembly; wherein the target value represents an index value of the health of the battery cell;

[0108] The determination module 32 is used to compare the target value with a preset threshold value to determine a spraying mode; wherein the spraying mode is used to indicate fire spraying information; the spraying mode includes a thermal anomaly mode and / or a thermal runaway mode;

[0109] The first spraying module 33 is used to spray the preset inert gas to the battery module at the target position if the spraying mode is determined to be the thermal abnormality mode; or,

[0110] The second spraying module 34 is used to spray the preset perfluorohexanone to the battery module at the target position if the spraying mode is determined to be the thermal runaway mode, and spray the inert gas to the battery module at the target position after detecting that the spraying of the perfluorohexanone is completed.

[0111] exist Figure 4 On the basis of the illustrated embodiment, an embodiment of the present application provides a structural schematic diagram of a fire protection device for another battery cell, including: multiple battery cells form a battery module, and multiple battery modules form a battery cluster; each battery cluster corresponds to a battery cluster sub-control valve; the battery assembly is provided with n battery clusters, and n is a positive integer greater than or equal to 1.

[0112] In a possible implementation, the second spraying module 34 is specifically used for:

[0113] If it is determined that the spraying mode is the thermal runaway mode, the target battery cluster sub-control valve corresponding to the battery module at the target position is opened, and the preset perfluorohexanone is sprayed to the battery module at the target position and other battery modules in the battery cluster where the battery module at the target position is located through the target battery cluster sub-control valve;

[0114] After it is detected that the spraying of perfluorohexanone is completed, inert gas is sprayed to the battery module at the target position and other battery modules in the battery cluster where the battery module at the target position is located.

[0115] In a possible implementation, each battery module corresponds to a sub-control solenoid valve; the second spraying module 34 is specifically used for:

[0116] If it is determined that the spraying mode is the thermal runaway mode, the target battery cluster sub-control valve corresponding to the battery module at the target position and the target sub-control solenoid valve under the target battery cluster sub-control valve are opened, and the preset perfluorohexanone is sprayed to the battery module at the target position through the target battery cluster sub-control valve and the target sub-control solenoid valve;

[0117] After it is detected that the spraying of perfluorohexanone is completed, an inert gas is sprayed toward the battery module at the target position.

[0118] In one possible implementation, the battery assembly is provided with an inert gas pipeline and a perfluorohexanone pipeline in a common pipeline; the inert gas pipeline is connected to a preset gas production device, and the perfluorohexanone pipeline is connected to a preset perfluorohexanone supply device; the inert gas pipeline is provided with a first solenoid valve, and the perfluorohexanone pipeline is provided with a second solenoid valve; the first solenoid valve is used to control the opening or closing of the inert gas pipeline, and the second solenoid valve is used to control the opening or closing of the perfluorohexanone pipeline.

[0119] In a possible implementation, the second spraying module 34 is specifically used for:

[0120] If it is determined that the spraying mode is the thermal runaway mode, the second solenoid valve is opened to spray the perfluorohexanone in the perfluorohexanone gas tank toward the battery module at the target position;

[0121] After it is detected that the spraying of perfluorohexanone is completed, the first solenoid valve is opened to spray the inert gas generated by the gas production equipment toward the battery module at the target position.

[0122] In a possible implementation, the first spraying module 33 is specifically used to:

[0123] If it is determined that the spraying mode is the thermal abnormality mode, the first solenoid valve is opened to spray the inert gas toward the battery module at the target position.

[0124] In a possible implementation, the target position is a battery cell, or a strain gauge at an explosion-proof valve of the battery cell; the determination module 32 is specifically used to:

[0125] If the target value is the temperature value of the battery cell, when it is determined that the temperature value is greater than a preset first thermal threshold, the spraying mode is determined to be a thermal abnormality mode; when it is determined that the temperature value is greater than a preset second thermal threshold, the spraying mode is determined to be a thermal runaway mode;

[0126] Alternatively, if the target value is the deformation of the explosion-proof valve sensed by the strain gauge, when it is determined that the deformation is greater than a preset first deformation threshold, the spraying mode is determined to be a thermal abnormality mode; when it is determined that the deformation is greater than a preset second deformation threshold, the spraying mode is determined to be a thermal runaway mode.

[0127] The device provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and this embodiment will not be described in detail here.

[0128] Figure 5 This is a schematic diagram of the structure of the electronic device provided in this application. Figure 5 As shown, the electronic device 50 provided in this embodiment includes: at least one processor 501 and a memory 502. Optionally, the device 50 also includes a communication component 503. The processor 501, the memory 502 and the communication component 503 are connected via a bus 504.

[0129] In a specific implementation process, at least one processor 501 executes the computer-executable instructions stored in the memory 502, so that at least one processor 501 executes the above method.

[0130] The specific implementation process of the processor 501 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0131] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the invention may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0132] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (Non-volatile Memory, NVM), such as at least one disk memory.

[0133] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0134] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0135] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0136] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0137] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0138] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0139] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0140] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0141] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0142] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0143] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A fire protection method for a battery cell, characterized in that: include: Detecting a target value of a target position of a battery cell in a preset battery assembly; wherein the target value represents an index value of the health of the battery cell; Comparing the target value with a preset threshold value to determine a spraying mode; wherein the spraying mode is used to indicate fire spraying information; the spraying mode includes a thermal anomaly mode and / or a thermal runaway mode; If it is determined that the spraying mode is a thermal abnormality mode, the preset inert gas is sprayed toward the battery module where the target position is located; or, if it is determined that the spraying mode is a thermal runaway mode, the preset perfluorohexanone is sprayed toward the battery module where the target position is located, and after detecting that the spraying of the perfluorohexanone is completed, the inert gas is sprayed toward the battery module where the target position is located.

2. The method according to claim 1, characterized in that A plurality of battery cells form a battery module, and a plurality of the battery modules form a battery cluster; each battery cluster corresponds to a battery cluster sub-control valve; the battery assembly is provided with n battery clusters, where n is a positive integer greater than or equal to 1.

3. The method according to claim 2, characterized in that If it is determined that the spraying mode is a thermal runaway mode, the preset perfluorohexanone is sprayed toward the battery module at the target position, and after it is detected that the spraying of the perfluorohexanone is completed, the inert gas is sprayed toward the battery module, including: If it is determined that the spraying mode is a thermal runaway mode, the target battery cluster sub-control valve corresponding to the battery module at the target position is opened, and the preset perfluorohexanone is sprayed to the battery module at the target position and other battery modules in the battery cluster where the battery module at the target position is located through the target battery cluster sub-control valve; After it is detected that the spraying of the perfluorohexanone is completed, the inert gas is sprayed toward the battery module at the target position and other battery modules in the battery cluster where the battery module at the target position is located.

4. The method according to claim 2, characterized in that: Each of the battery modules corresponds to a sub-control solenoid valve; if the spraying mode is determined to be a thermal runaway mode, the preset perfluorohexanone is sprayed to the battery module at the target position, and after the spraying of the perfluorohexanone is detected to be completed, the inert gas is sprayed to the battery module, including: If it is determined that the spraying mode is the thermal runaway mode, the target battery cluster sub-control valve corresponding to the battery module at the target position and the target sub-control solenoid valve under the target battery cluster sub-control valve are opened, and the preset perfluorohexanone is sprayed to the battery module at the target position through the target battery cluster sub-control valve and the target sub-control solenoid valve; After it is detected that the spraying of the perfluorohexanone is complete, the inert gas is sprayed toward the battery module at the target position.

5. The method according to claim 1, characterized in that The battery assembly is provided with an inert gas pipeline and a perfluorohexanone pipeline of a common pipeline; the inert gas pipeline is connected to a preset gas production equipment, and the perfluorohexanone pipeline is connected to a preset perfluorohexanone providing equipment; the inert gas pipeline is provided with a first solenoid valve, and the perfluorohexanone pipeline is provided with a second solenoid valve; the first solenoid valve is used to control the opening or closing of the inert gas pipeline, and the second solenoid valve is used to control the opening or closing of the perfluorohexanone pipeline.

6. The method according to claim 5, characterized in that If it is determined that the spraying mode is a thermal runaway mode, the preset perfluorohexanone is sprayed toward the battery module at the target position, and after it is detected that the spraying of the perfluorohexanone is completed, the inert gas is sprayed toward the battery module, including: If it is determined that the spraying mode is the thermal runaway mode, opening the second solenoid valve to spray the perfluorohexanone in the perfluorohexanone gas tank toward the battery module at the target position; After it is detected that the spraying of the perfluorohexanone is complete, the first solenoid valve is opened to spray the inert gas generated by the gas production equipment toward the battery module at the target position.

7. The method according to claim 5, characterized in that If it is determined that the spraying mode is a thermal abnormality mode, spraying a preset inert gas toward the battery module where the target position is located includes: If it is determined that the spraying mode is the thermal abnormality mode, the first solenoid valve is opened to spray the inert gas toward the battery module where the target position is located.

8. The method according to any one of claims 1 to 7, characterized in that: The target position is the battery cell, or a strain gauge at an explosion-proof valve of the battery cell; The target value is compared with a preset threshold value to determine a spraying mode, including: If the target value is the temperature value of the battery cell, when it is determined that the temperature value is greater than a preset first thermal threshold, the spraying mode is determined to be a thermal abnormality mode; when it is determined that the temperature value is greater than a preset second thermal threshold, the spraying mode is determined to be a thermal runaway mode; Alternatively, if the target value is the deformation of the explosion-proof valve sensed by the strain gauge, when it is determined that the deformation is greater than a preset first deformation threshold, the spraying mode is determined to be a thermal abnormality mode; when it is determined that the deformation is greater than a preset second deformation threshold, the spraying mode is determined to be a thermal runaway mode.

9. A fire protection device for a battery cell, characterized in that: include: An acquisition module, used to detect a target value of a target position of a battery cell in a preset battery assembly; wherein the target value represents an index value of the health of the battery cell; A determination module, used to compare the target value with a preset threshold value to determine a spraying mode; wherein the spraying mode is used to indicate fire spraying information; the spraying mode includes a thermal anomaly mode and / or a thermal runaway mode; a first spraying module, configured to spray a preset inert gas toward the battery module at the target position if the spraying mode is determined to be a thermal abnormality mode; or The second spraying module is used to spray the preset perfluorohexanone to the battery module at the target position if it is determined that the spraying mode is a thermal runaway mode, and spray the inert gas to the battery module at the target position after detecting that the spraying of the perfluorohexanone is completed.

10. An electronic device, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 8.

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