Explosion-proof valve control method and system, battery pack, and vehicle
Patent Information
- Application Number
- PCT/CN2025/144217
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-02-28
- Filing Date
- 2025-12-22
- Publication Date
- 2026-09-03
Smart Images
Figure CN2025144217_03092026_PF_FP_ABST
Abstract
Description
Explosion-proof valve control methods, systems, battery packs and vehicles
[0001] Related applications
[0002] This application claims priority to Chinese patent application No. 202510234172.3, filed on February 28, 2025, the entire contents of which are incorporated herein by reference. Technical Field
[0003] This application relates to, but is not limited to, the field of explosion-proof valve control technology, and particularly to an explosion-proof valve control method, system, battery pack, and vehicle. Background Technology
[0004] With the continuous development of battery pack technology, users have placed higher demands on the control methods of explosion-proof valves on battery packs.
[0005] Traditional explosion-proof valve control methods use a single passive explosion-proof valve (mechanical explosion-proof valve) to release pressure from the battery pack, thereby achieving explosion-proof control of battery pack venting. This explosion-proof valve control method has certain defects. Due to the explosion-proof characteristics of the passive explosion-proof valve itself (i.e., it passively opens when thermal runaway high-temperature gas impacts the opening state, and does not open if the opening state is not reached), there is a problem that high-temperature gas can form turbulence inside the pack (such as when it is close to the opening state), which can damage the components inside the battery pack. In other words, this explosion-proof valve control method will damage the components inside the battery pack due to the turbulence of high-temperature gas inside the pack (the passive explosion-proof valve needs to be passively opened), thus resulting in poor explosion-proof valve control effect.
[0006] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art. Summary of the Invention
[0007] This application provides an explosion-proof valve control method, which is applied to an explosion-proof valve control system installed on a battery pack. The explosion-proof valve control system includes an electric explosion-proof valve and a thermal runaway detection device. The explosion-proof valve control method includes:
[0008] The thermal runaway detection device acquires thermal runaway information of the battery pack and determines the explosion-proof valve control command based on the thermal runaway information and the preset thermal runaway gas pressure state.
[0009] If the explosion-proof valve control command is a preset valve opening command, then the electric explosion-proof valve is opened according to the explosion-proof valve control command to realize the explosion-proof control of the battery pack.
[0010] In one embodiment, the thermal runaway information includes the gas pressure state of each thermal runaway region within the battery pack, and the step of determining the explosion-proof valve control command based on the thermal runaway information and the preset thermal runaway gas pressure state includes:
[0011] For each thermal runaway region, the pressure state is checked to see if it matches the preset thermal runaway pressure state.
[0012] When the pressure state matches the preset thermal runaway pressure state, the first thermal runaway region corresponding to the pressure state is determined, and the explosion-proof valve control command is determined according to the first thermal runaway region.
[0013] In one embodiment, the explosion-proof valve control system further includes a mechanical explosion-proof valve, and the step of determining the explosion-proof valve control command based on the first thermal runaway region includes:
[0014] The target explosion-proof valve for the first thermal runaway region is determined, wherein the target explosion-proof valve includes at least one of the mechanical explosion-proof valve and the electric explosion-proof valve;
[0015] When the electric explosion-proof valve is present in the target explosion-proof valve, the preset valve opening command is used as the explosion-proof valve control command of the first electric explosion-proof valve, wherein the first electric explosion-proof valve is the electric explosion-proof valve installed in the first thermal runaway zone.
[0016] If the electric explosion-proof valve is not present in the target explosion-proof valve, but the mechanical explosion-proof valve is present, then the adjacent thermal runaway region of the first thermal runaway region is determined, and the second electric explosion-proof valve of the adjacent thermal runaway region is determined. The preset valve opening command is used as the explosion-proof valve control command of the second electric explosion-proof valve, wherein the second electric explosion-proof valve is the electric explosion-proof valve installed in the adjacent thermal runaway region.
[0017] In one embodiment, the explosion-proof valve control method further includes:
[0018] The installation area of the electric explosion-proof valve on the battery pack and the cell design structure inside the battery pack are determined, and a second thermal runaway region on the battery pack is determined based on the installation area, wherein the second thermal runaway region includes a thermal runaway region where the electric explosion-proof valve does not exist;
[0019] Based on the cell design structure and the preset optimal exhaust path strategy, a third thermal runaway region corresponding to each second thermal runaway region is determined, and the third thermal runaway region is taken as the adjacent thermal runaway region of the second thermal runaway region. The third thermal runaway region includes the thermal runaway region where the electric explosion-proof valve exists. The optimal exhaust path strategy includes the strategy of exhaust distance closest and exhaust distance optimal based on the cell design structure.
[0020] In one embodiment, after the step of detecting whether the pressure state of each thermal runaway region matches a preset thermal runaway pressure state, the method includes:
[0021] If the pressure state of all the aforementioned thermal runaway regions does not match the preset thermal runaway pressure state, then the preset valve closing command will be used as the explosion-proof valve control command for all the aforementioned electric explosion-proof valves, or...
[0022] Obtain the valve status of each thermal runaway region at the previous moment. If the gas pressure status of the thermal runaway region does not match the preset thermal runaway gas pressure status, and the valve status matches the preset open status, then determine the third electric explosion-proof valve corresponding to the thermal runaway region, and use the preset valve closing command as the explosion-proof valve control command of the third electric explosion-proof valve.
[0023] In one embodiment, after the step of determining the explosion-proof valve control command based on the thermal runaway information and the preset thermal runaway gas pressure state, the method includes:
[0024] When the explosion-proof valve control command is a preset valve closing command, the target valve closing explosion-proof valve corresponding to the explosion-proof valve control command is determined, and the target valve closing explosion-proof valve is controlled to close based on the valve closing command.
[0025] In one embodiment, the explosion-proof valve control system further includes a battery pack parameter acquisition device, and the explosion-proof valve control method further includes:
[0026] The battery pack parameters collected by the battery pack parameter acquisition device are obtained, and it is detected whether the battery pack parameters match the preset valve opening conditions. The battery pack parameters include at least one of the following: cell voltage, battery pack temperature, battery pack voltage, battery pack communication, and battery pack current.
[0027] If at least one parameter in the battery pack parameters matches a preset valve opening condition, and the explosion-proof valve control command is a preset valve opening command, then the electric explosion-proof valve is controlled to open.
[0028] Furthermore, to achieve the above objectives, this application also provides an explosion-proof valve control system, which includes an electric explosion-proof valve, a thermal runaway detection device, and an explosion-proof valve controller mounted on a battery pack. The explosion-proof valve controller is connected to the electric explosion-proof valve and the thermal runaway detection device, and includes:
[0029] The information acquisition module is used to acquire thermal runaway information of the battery pack collected by the thermal runaway detection device, and determine the explosion-proof valve control command based on the thermal runaway information and the preset thermal runaway gas pressure state.
[0030] The explosion-proof control module is used to control the opening of the electric explosion-proof valve according to the preset valve opening command when the explosion-proof valve control command is a preset valve opening command, so as to realize the explosion-proof control of the battery pack.
[0031] Furthermore, to achieve the above objectives, this application also provides a battery pack, including an explosion-proof valve control system, a processor and a memory, and an explosion-proof valve control method program stored in the memory that can be executed by the processor, wherein when the explosion-proof valve control method program is executed by the processor, it implements the steps of the explosion-proof valve control method as described above.
[0032] This application also provides a vehicle that includes the battery pack described above, wherein the battery pack is used to perform the steps of the explosion-proof valve control method described above.
[0033] This application provides an explosion-proof valve control method applied to an explosion-proof valve control system installed on a battery pack. The explosion-proof valve control system includes an electric explosion-proof valve and a thermal runaway detection device. The method acquires thermal runaway information from the battery pack via the thermal runaway detection device and determines an explosion-proof valve control command based on the thermal runaway information and a preset thermal runaway pressure state. If the explosion-proof valve control command is a preset valve opening command, the electric explosion-proof valve is opened according to the command to achieve explosion-proof control of the battery pack. This explosion-proof valve control method uses the thermal runaway detection device to acquire battery... The thermal runaway information of the battery pack is used to control the opening of the electric explosion-proof valve based on the determined explosion-proof valve control command. This achieves explosion-proof control of the battery pack (i.e., intelligent venting of the electric explosion-proof valve based on the collected gas pressure status during thermal runaway, rather than using pneumatic mechanical actuation to open the valve). This avoids the problem of high-temperature gas forming turbulence inside the pack and damaging the components when using passive explosion-proof valves. By determining the explosion-proof valve control command through thermal runaway information and then controlling the opening and closing of the electric explosion-proof valve based on the explosion-proof valve control command, the defects of passive explosion-proof valves can be avoided, thereby improving the control effect of the explosion-proof valve.
[0034] The purpose of this application is to provide a general description of the technical solutions of the embodiments of this application, so as to provide a clearer understanding of the overall concept of this application. The above description does not constitute a limitation on the scope of protection of the claims of this application. Attached Figure Description
[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0036] Figure 1 is a flowchart illustrating the first embodiment of the explosion-proof valve control method of this application.
[0037] Figure 2 is a structural schematic diagram of an existing passive explosion-proof valve;
[0038] Figure 3 is a schematic diagram of a battery pack design in the explosion-proof valve control method of this application embodiment;
[0039] Figure 4 is a schematic diagram of the modules of the system base chip in an embodiment of this application;
[0040] Figure 5 is a schematic diagram of the hardware operating environment involved in the device in the embodiments of this application.
[0041] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.
[0042] Explanation of icon numbers:
[0043] 1. Housing; 2. Spring; 3. Guide rod; 4. Body; 5. Top cover; 6. Piston; 7. Sealing ring; 100. Battery pack; 101. First thermal runaway zone; 102. Second thermal runaway zone; 103. Third thermal runaway zone; 104. Fourth thermal runaway zone; 201. Mechanical explosion-proof valve; 202. Electric explosion-proof valve. Embodiments of the present invention
[0044] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.
[0045] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.
[0046] Existing explosion-proof valve control methods all use passive explosion-proof valves. Refer to Figure 2, which is a structural schematic of an existing passive explosion-proof valve. In the figure, the upper cover 5 and the sealing ring 7 ensure the sealing of the explosion-proof valve body 4. The guide rod 3 and spring 2 are placed in the housing 1. The guide rod 3, connected to the spring 2, ensures the opening and closing of the explosion-proof valve. Its working principle is as follows: when thermal runaway occurs inside the battery pack, causing an increase in internal pressure, once the pressure reaches a certain level, the internal pressure overcomes the elastic force of the spring 2, pushing the guide rod 3 outward (i.e., the upper cover 5 is pushed open). At this time, the explosion-proof valve opens, releasing the internal pressure. When the internal pressure decreases to a certain level, the spring 2 rebounds, pushing the guide rod 3 inward, and the explosion-proof valve closes (i.e., the upper cover 5 and the sealing ring 7 are in contact). However, passive explosion-proof valves can cause problems. First, they open due to the impact of high-temperature gas during thermal runaway, resulting in a long passive opening response time. Before opening, the high-temperature gas creates turbulence inside the battery pack, which can damage the components. Second, after a brief and violent exhaust from the battery cell, the exhaust becomes a slow and prolonged process, causing a rapid drop in pressure inside the pack. This leads to the valve closing immediately, leaving high-temperature exhaust gas inside the pack, which in turn results in poor control of the explosion-proof valve.
[0047] Therefore, based on the shortcomings of the above-mentioned explosion-proof valve control schemes, the explosion-proof valve control method of this application is proposed. The solution of this application embodiment is: to collect thermal runaway information of the battery pack through a thermal runaway detection device, and then to control the opening of the electric explosion-proof valve based on the determined explosion-proof valve control command, so as to realize the explosion-proof control of the battery pack (that is, to control the electric explosion-proof valve to intelligently vent based on the collected air pressure state during thermal runaway, rather than using pneumatic mechanical actuation to open the valve), thereby avoiding the problem of high-temperature gas forming turbulence in the pack and damaging the components inside the battery pack when using passive explosion-proof valves. By determining the explosion-proof valve control command through thermal runaway information, and then controlling the opening and closing of the electric explosion-proof valve based on the explosion-proof valve control command, the defects of passive explosion-proof valves can be avoided, thereby improving the effect of explosion-proof valve control.
[0048] The executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone; or a device capable of performing the above functions, such as a controller within a battery pack, like the controller within a BMS (Battery Management System). The following description uses a battery pack internal controller as an example to illustrate this embodiment and the subsequent embodiments.
[0049] Based on this, this application provides an explosion-proof valve control method. Referring to Figure 1, which is a flowchart of the first embodiment of the explosion-proof valve control method of this application.
[0050] Referring to Figure 1, this application provides an explosion-proof valve control method. In a first embodiment of the explosion-proof valve control method, the method is applied to an explosion-proof valve control system installed on a battery pack. The explosion-proof valve control system includes an electric explosion-proof valve and a thermal runaway detection device. The explosion-proof valve control method includes:
[0051] Step S10: Obtain thermal runaway information of the battery pack collected by the thermal runaway detection device, and determine the explosion-proof valve control command based on the thermal runaway information and the preset thermal runaway gas pressure state;
[0052] For example, the explosion-proof valve control method is applied to an explosion-proof valve control system installed on a battery pack. The explosion-proof valve control system includes an electric explosion-proof valve and a thermal runaway detection device. Referring to Figure 3, which is a schematic diagram of a battery pack design in the explosion-proof valve control method of this application, the entire battery pack 100 is divided into four thermal runaway regions 101-104 (i.e., the first thermal runaway region to the fourth thermal runaway region). At least one explosion-proof valve is installed in each thermal runaway region. The explosion-proof valve (generally, a mechanical explosion-proof valve 201 and an electric explosion-proof valve 202 are used together to reduce the cost of explosion-proof control) can be a mechanical explosion-proof valve 201 or an electric explosion-proof valve 202 (i.e., an explosion-proof valve that is opened and closed by electric drive). Then, by detecting thermal runaway at different points, after detecting the thermal runaway signal, the explosion-proof valve closest to the thermal runaway point is opened to select the optimal and shortest exhaust path. Of course, more thermal runaway zones can be set up, and different types of explosion-proof valves can be installed in each thermal runaway zone. There is no limit to the number of defined thermal runaway zones, nor is there any restriction on the type and number of explosion-proof valves installed in each thermal runaway zone. It is worth noting that the thermal runaway detection device can be an instrument for collecting air pressure inside the battery pack, such as an air pressure sensor, and can be located at the center of the thermal runaway zone or other locations; this is not limited here.
[0053] In this embodiment, when explosion-proof control is required (mainly due to excessive internal pressure in the battery pack requiring venting), thermal runaway information from the battery pack is acquired by the thermal runaway detection device. This process can be performed in real time or at intervals. Thermal runaway information characterizes whether thermal runaway has occurred within the battery pack. Its indicators may include, but are not limited to, the internal pressure value of the battery pack, or can be determined comprehensively by combining parameters such as battery pack temperature, cell voltage, and battery pack current. In this embodiment, for ease of explanation, the internal pressure state is used as the primary example of thermal runaway information. Based on the thermal runaway information and a preset thermal runaway pressure state (i.e., intelligently determining whether the internal pressure of the battery pack exceeds the defined thermal runaway pressure, i.e., the preset thermal runaway pressure state), the explosion-proof valve control command can be determined. This command controls the opening and closing of the electric explosion-proof valve in the explosion-proof valve control system, thereby achieving intelligent opening or closing of the electric explosion-proof valve and ensuring the effectiveness of the explosion-proof valve control.
[0054] At this point, the improvement of mechanical explosion-proof valves is generally to reduce the air pressure value for opening the valve, for example, reducing the original opening pressure threshold to a certain percentage of the original value, so that the explosion-proof valve is easier to open. However, at this time, random events may open the valve, such as vibration, which may cause the valve to open accidentally, resulting in low accuracy of explosion-proof control.
[0055] In step S20, if the explosion-proof valve control command is a preset valve opening command, then the electric explosion-proof valve is opened according to the explosion-proof valve control command to achieve explosion-proof control of the battery pack.
[0056] In this embodiment, after determining the explosion-proof valve control command, the electric explosion-proof valve is opened and closed based on the command. This allows the valve to open before thermal runaway venting (i.e., when the explosion-proof valve control command is a preset opening command), achieving directional venting and reducing the generation and accumulation of high-temperature turbulence within the pack, thereby reducing damage to components from high-temperature gases. Furthermore, the explosion-proof valve is closed at fixed times and pressures to ensure that most of the high-temperature gas inside the pack is discharged, further reducing damage to components. In other words, the electric explosion-proof valve intelligently vents high-temperature gases from within the battery pack, avoiding the shortcomings of passive explosion-proof valves and improving the control effectiveness of the explosion-proof valve.
[0057] In this embodiment, an explosion-proof valve control method is provided, applied to an explosion-proof valve control system installed on a battery pack. The explosion-proof valve control system includes an electric explosion-proof valve and a thermal runaway detection device. The method acquires thermal runaway information from the battery pack using the thermal runaway detection device and determines the explosion-proof valve control command based on the thermal runaway information and a preset thermal runaway pressure state. When the explosion-proof valve control command is a preset valve opening command, the electric explosion-proof valve is opened according to the command to achieve explosion-proof control of the battery pack. This explosion-proof valve control method acquires thermal runaway information from the battery pack using the thermal runaway detection device. Furthermore, based on the determined explosion-proof valve control command, the electric explosion-proof valve is opened to achieve battery pack explosion-proof control (i.e., in the event of thermal runaway, the electric explosion-proof valve is intelligently vented based on the collected gas pressure status, rather than using pneumatic mechanical actuation to open the valve). This avoids the problem of high-temperature gas forming turbulence inside the battery pack, which can damage the components inside the battery pack, as is the case with passive explosion-proof valves. By determining the explosion-proof valve control command through thermal runaway information, and then controlling the opening and closing of the electric explosion-proof valve based on the explosion-proof valve control command, the defects of passive explosion-proof valves can be avoided, thereby improving the control effect of the explosion-proof valve.
[0058] Based on the first embodiment of this application described above, a second embodiment of the explosion-proof valve control method of this application is proposed. In this embodiment, step S10, where thermal runaway information includes the gas pressure state of each thermal runaway region within the battery pack, and the step of determining the explosion-proof valve control command based on the thermal runaway information and the preset thermal runaway gas pressure state, includes:
[0059] Step S11: For the gas pressure state of each thermal runaway region, check whether the gas pressure state matches the preset thermal runaway gas pressure state.
[0060] Step S12: When the gas pressure state matches the preset thermal runaway gas pressure state, the first thermal runaway region corresponding to the gas pressure state is determined, and the explosion-proof valve control command is determined according to the first thermal runaway region.
[0061] In this embodiment, as shown in Figure 3, there are multiple thermal runaway regions inside the battery pack. The thermal runaway detection device collects the air pressure status of each thermal runaway region, which is generally the air pressure value, and then determines whether the air pressure status of each thermal runaway region matches the preset thermal runaway air pressure status. The thermal runaway air pressure status refers to the air pressure value during thermal runaway. For example, the normal air pressure value is A Pa, and the thermal runaway air pressure value is B Pa. If the air pressure status of the first thermal runaway region 101 is B+1 Pa, then it is determined that the first thermal runaway region 101 has experienced thermal runaway. Of course, the thermal runaway air pressure value B is generally set to be less than the opening pressure value of the mechanical explosion-proof valve, so as to ensure that the electric explosion-proof valve can be controlled to vent before the mechanical explosion-proof valve is opened, so as to avoid the generation and accumulation of high temperature turbulence inside the pack. At this point, when the gas pressure state matches the preset thermal runaway gas pressure state, the first thermal runaway region (i.e., the thermal runaway region where thermal runaway occurs) corresponding to the gas pressure state that matches the preset thermal runaway gas pressure state can be determined. In other words, the region within the battery pack where thermal runaway occurs can be determined, so that explosion-proof control can be carried out in a targeted manner for that region. That is, the explosion-proof valve control command is determined based on the first thermal runaway region. Since the entire solution uses a combination of mechanical and electric explosion-proof valves, it is necessary to determine the explosion-proof valve control command based on the first thermal runaway region. If only electric explosion-proof valves are used in the battery pack, the explosion-proof valve control command can be directly determined to open the electric explosion-proof valve in the first thermal runaway region, so as to intelligently vent gas from a certain thermal runaway region, thereby ensuring the safety of the components in the entire battery pack and the effectiveness of explosion-proof control.
[0062] The explosion-proof valve control system also includes a mechanical explosion-proof valve. The steps for determining the explosion-proof valve control command based on the first thermal runaway zone include:
[0063] Step S121: Determine the target explosion-proof valve set in the first thermal runaway zone, wherein the target explosion-proof valve includes at least one of a mechanical explosion-proof valve and an electric explosion-proof valve;
[0064] Step S122: When there is an electric explosion-proof valve in the target explosion-proof valve, the preset valve opening command is used as the explosion-proof valve control command of the first electric explosion-proof valve, wherein the first electric explosion-proof valve is an electric explosion-proof valve set in the first thermal runaway zone.
[0065] Step S123: When there is no electric explosion-proof valve in the target explosion-proof valve and there is a mechanical explosion-proof valve, the adjacent thermal runaway region of the first thermal runaway region is determined, and the second electric explosion-proof valve of the adjacent thermal runaway region is determined. The preset valve opening command is used as the explosion-proof valve control command of the second electric explosion-proof valve, wherein the second electric explosion-proof valve is an electric explosion-proof valve installed in the adjacent thermal runaway region.
[0066] In this embodiment, to reduce the overall cost of the explosion-proof valve control system, a mechanical explosion-proof valve can also be used. Furthermore, by combining mechanical and electric explosion-proof valves, the effectiveness of explosion-proof control can be guaranteed at a low cost. After determining the first thermal runaway region requiring venting (i.e., explosion-proof control, hereinafter referred to as venting), the target explosion-proof valve for the first thermal runaway region is determined. The target explosion-proof valve includes at least one of a mechanical explosion-proof valve and an electric explosion-proof valve; that is, the first thermal runaway region can be equipped with a mechanical explosion-proof valve and / or an electric explosion-proof valve. If an electric explosion-proof valve is installed in the first thermal runaway region, a preset valve opening command is directly used as the explosion-proof valve control command for the first electric explosion-proof valve. The first electric explosion-proof valve is the electric explosion-proof valve installed in the first thermal runaway region, and the preset valve opening command refers to the command to control the opening of the electric explosion-proof valve. Conversely, if the target explosion-proof valve does not contain an electric explosion-proof valve but has a mechanical explosion-proof valve, venting will be achieved through electric explosion-proof valves in other locations. This determines the adjacent thermal runaway region of the first thermal runaway region, and then determines the second electric explosion-proof valve in the adjacent thermal runaway region. The preset valve opening command is used as the explosion-proof valve control command for the second electric explosion-proof valve. The second electric explosion-proof valve is an electric explosion-proof valve installed in the adjacent thermal runaway region. The adjacent thermal runaway region refers to the optimal venting region of the first thermal runaway region. This region needs to meet the requirements of having an electric explosion-proof valve and being the thermal runaway region with the best venting effect. Thus, the electric explosion-proof valve with the optimal venting path can be selected to vent the first thermal runaway region, thereby ensuring the explosion-proof control effect of the entire battery pack.
[0067] If the first thermal runaway zone is equipped with a mechanical explosion-proof valve, it will be triggered to open and vent when the pressure in the first thermal runaway zone continues to increase, ensuring the venting effect. After the mechanical explosion-proof valve finishes venting (if the air pressure does not reach the opening condition of the mechanical explosion-proof valve), the second electric explosion-proof valve will continue to vent until the air pressure state of the first thermal runaway zone does not match the preset thermal runaway air pressure state. This avoids the damage to the components in the battery pack caused by the harmful gas generated after the mechanical explosion-proof valve closes when the rate of harmful gas generation is less than the venting rate of the mechanical explosion-proof valve.
[0068] In one embodiment, the explosion-proof valve control method further includes:
[0069] Step S30: Determine the installation area of the electric explosion-proof valve on the battery pack and the cell design structure inside the battery pack, and determine the second thermal runaway region on the battery pack based on the installation area, wherein the second thermal runaway region includes the thermal runaway region where the electric explosion-proof valve does not exist;
[0070] Step S40: Based on the cell design structure and the preset optimal exhaust path strategy, determine the third thermal runaway region corresponding to each second thermal runaway region, and take the third thermal runaway region as the adjacent thermal runaway region of the second thermal runaway region. The third thermal runaway region includes thermal runaway regions with electric explosion-proof valves. The optimal exhaust path strategy includes strategies based on the cell design structure that have the shortest exhaust distance and the optimal exhaust distance.
[0071] In this embodiment, since it needs to be used in conjunction with both mechanical and electric explosion-proof valves, it is necessary to determine the optimal area where there is no electric explosion-proof valve for venting. This is done by determining the installation area of the electric explosion-proof valve on the battery pack and the cell design structure inside the battery pack. The installation area refers to the thermal runaway area where the electric explosion-proof valve is installed, and the cell design structure refers to the cell installation structure inside the battery pack. Based on the installation area, a second thermal runaway area on the battery pack can be determined. The second thermal runaway area includes the thermal runaway area where there is no electric explosion-proof valve. That is, it is necessary to determine each thermal runaway area where there is no electric explosion-proof valve in order to determine the electric explosion-proof valve that can be used for auxiliary venting in that thermal runaway area. Then, based on the cell design structure and the preset optimal venting path strategy, the third thermal runaway region corresponding to each second thermal runaway region will be determined, and the third thermal runaway region will be regarded as the adjacent thermal runaway region of the second thermal runaway region. The third thermal runaway region includes thermal runaway regions with electric explosion-proof valves. The optimal venting path strategy includes the strategy of venting the shortest venting distance and the optimal venting distance based on the cell design structure. That is, based on the cell design structure, the third thermal runaway region that can be vented by the second thermal runaway region can be determined. In other words, the venting of the second thermal runaway region can be achieved by opening the electric explosion-proof valve of the third thermal runaway region. It is worth noting that, due to the influence of the cell design structure, two strategies can be selected: the closest venting distance and the optimal venting distance. As shown in Figure 3, the distance between the first thermal runaway region 101 (assuming it is a mechanical explosion-proof valve) and the third thermal runaway region 103 (assuming it is an electric explosion-proof valve) is the closest. Therefore, the third thermal runaway region 103 can be regarded as the adjacent thermal runaway region of the first thermal runaway region 101. If the distance between the third thermal runaway region 103 and the first thermal runaway region 101 is affected by the cell design structure (such as large design space occupation, which is not conducive to venting), the third thermal runaway region 103 (although it is far away, it is suitable for venting) will be selected as the adjacent thermal runaway region of the first thermal runaway region 101. This ensures that subsequent venting assistance can be quickly performed based on the determined adjacent thermal runaway region to ensure the explosion-proof control effect of the entire battery pack.
[0072] In one embodiment, based on the first and / or second embodiments of this application described above, a third embodiment of the explosion-proof valve control method of this application is proposed. In this embodiment, after step S10, which involves detecting whether the gas pressure state of each thermal runaway region matches a preset thermal runaway gas pressure state, the method further includes:
[0073] Step S111: When the gas pressure state in all thermal runaway zones does not match the preset thermal runaway gas pressure state, the preset valve closing command is used as the explosion-proof valve control command for all electric explosion-proof valves, or...
[0074] Step S112: Obtain the valve status of each thermal runaway region at the previous moment. If the gas pressure status of the thermal runaway region does not match the preset thermal runaway gas pressure status, but the valve status matches the preset open status, then determine the third electric explosion-proof valve corresponding to the thermal runaway region, and use the preset valve closing command as the explosion-proof valve control command of the third electric explosion-proof valve.
[0075] In this embodiment, when determining the control command for the explosion-proof valve, in addition to determining the area of thermal runaway, it is also possible to determine the area that is not thermally runaway and the area that has become not thermally runaway. That is, when the gas pressure state of all thermal runaway areas does not match the preset thermal runaway gas pressure state, the preset valve closing command is used as the explosion-proof valve control command for all electric explosion-proof valves, so that the electric explosion-proof valves that are currently in the open state are closed. Furthermore, by determining the valve status of each thermal runaway region at the previous moment, and then checking whether the valve status of each thermal runaway region matches the preset opening state, it can be determined whether the explosion-proof valve was controlled to open at the previous moment (generally an electric explosion-proof valve, because mechanical explosion-proof valves can automatically close). If the electric explosion-proof valve was open at the previous moment, and the current gas pressure state does not match the preset thermal runaway gas pressure state, i.e., there is no thermal runaway phenomenon, then the third electric explosion-proof valve corresponding to the thermal runaway region will be determined, and the preset valve closing command will be used as the explosion-proof valve control command for the third electric explosion-proof valve. The valve closing command refers to the command to close the electric explosion-proof valve (the difference between the two control methods lies in the premise; the first is the initial control stage, and the second is the control stage). It is worth noting that, at this time, the electric explosion-proof valves in the vicinity of the thermal runaway zone can be closed based on the above conditions. However, the closing condition for the electric explosion-proof valves in the vicinity of the thermal runaway zone is that neither the valves themselves nor the areas being assisted in venting are in thermal runaway. Otherwise, the electric explosion-proof valves will continue to be opened. The advantage of the second valve closing method is that it can selectively close the electric valves in certain thermal runaway zones, thereby ensuring the accuracy and efficiency of the electric explosion-proof valve control.
[0076] In one embodiment, after determining the explosion-proof valve control command based on thermal runaway information and a preset thermal runaway gas pressure state, the method includes:
[0077] Step S21: When the explosion-proof valve control command is a preset valve closing command, the target valve closing explosion-proof valve corresponding to the explosion-proof valve control command is determined, and the target valve closing explosion-proof valve is controlled to close based on the valve closing command.
[0078] In this embodiment, after determining the explosion-proof valve control command, the corresponding electric explosion-proof valve is controlled based on the command. Specifically, when the control command is a preset closing command, the corresponding electric explosion-proof valve is closed, thus determining the target closed explosion-proof valve (the electric explosion-proof valve to be closed as specified in the command). Conversely, when the control command is a preset opening command, the corresponding electric explosion-proof valve is opened, thus determining the target open explosion-proof valve (the electric explosion-proof valve to be opened as specified in the command). This ensures that thermal runaway areas are vented in advance, guaranteeing battery pack safety and explosion-proof control effectiveness. It is worth noting that each explosion-proof valve can be individually connected to the BMU (Battery Management Unit) using an interlock signal data line. This allows for the determination of the opening and closing status of each valve, preventing interference between electric valves. The interlock signal can also be transmitted to other displays, such as the vehicle's overall display screen, so that users can promptly know the opening and closing status of the explosion-proof valves.
[0079] In one embodiment, based on the first, second, and / or third embodiments of this application described above, a fourth embodiment of the explosion-proof valve control method of this application is proposed. In this embodiment, the explosion-proof valve control system further includes a battery pack parameter acquisition device, and the explosion-proof valve control method further includes:
[0080] Step a: Obtain the battery pack parameters collected by the battery pack parameter acquisition device, and detect whether the battery pack parameters match the preset valve opening conditions. The battery pack parameters include at least one of the following: cell voltage, battery pack temperature, battery pack voltage, battery pack communication, and battery pack current.
[0081] Step b: If at least one parameter in the battery pack parameters matches the preset valve opening condition, and the explosion-proof valve control command is the preset valve opening command, then the electric explosion-proof valve is controlled to open.
[0082] In this embodiment, in addition to using thermal runaway information as the driving basis, the electric explosion-proof valve also uses other bases for driving. The explosion-proof valve control system includes a battery pack parameter acquisition device to collect battery pack parameters, and then detects whether these parameters match preset valve opening conditions. The battery pack parameters include at least one of the following: cell voltage, battery pack temperature, battery pack voltage, battery pack communication, and battery pack current. If at least one parameter matches the preset valve opening conditions, the electric explosion-proof valve is opened. In this case, all or part of the electric explosion-proof valve can be selectively opened. The battery pack parameter acquisition device refers to an instrument for collecting battery pack parameters, such as sensors for collecting temperature, voltage, current, and air pressure, as well as sensors for communication. The preset valve opening conditions refer to the opening thresholds set for the battery pack parameters. For example, if the battery pack temperature is greater than S, the valve opening conditions are considered met. Alternatively, the valve opening conditions can be set as: abnormal cell voltage data acquisition; abnormal module temperature data acquisition; abnormal battery pack temperature data acquisition; abnormal voltage sampling; voltage sampling open circuit; invalid temperature acquisition; CSC (Cell Supervision) circuit. The system can detect abnormal communication with the battery pack, abnormal pressure rise within the battery pack, and other issues. Specifically, if any parameter in the battery pack matches the preset valve opening condition, and the explosion-proof valve control command is the preset opening command (this definition ensures the accuracy of the explosion-proof valve opening; it's worth noting that other opening conditions can be defined with lower priority than thermal runaway priority. For example, if only at least one parameter in the battery pack matches the preset valve opening condition, the valve may not open, but relevant instruments will alert the user, thus ensuring the accuracy of thermal runaway control and preventing interference from other information), the electric explosion-proof valve will open. The electric explosion-proof valve opening control process can be executed synchronously with the thermal runaway control process. However, a delay time is set when the electric explosion-proof valve opens under the above conditions, after which it will close to avoid the impact of accidental opening. For example, if opening is caused by battery pack communication issues, and the battery pack communication remains abnormal after prolonged opening, an alarm will be triggered to prevent foreign objects from entering the battery pack, thus ensuring the accuracy of the battery pack explosion-proof control.
[0083] The above examples are only for understanding this application and do not constitute a limitation on the explosion-proof valve control method of this application. Any simple modifications based on this technical concept are within the protection scope of this application.
[0084] This application also provides an explosion-proof valve control system, which includes an electric explosion-proof valve mounted on a battery pack, a thermal runaway detection device, and an explosion-proof valve controller. The explosion-proof valve controller is connected to the electric explosion-proof valve and the thermal runaway detection device. Referring to Figure 4, the explosion-proof valve controller includes:
[0085] The information acquisition module A10 is used to acquire thermal runaway information of the battery pack collected by the thermal runaway detection device, and to determine the explosion-proof valve control command based on the thermal runaway information and the preset thermal runaway gas pressure state.
[0086] The explosion-proof control module A20 is used to control the opening of the electric explosion-proof valve according to the preset valve opening command when the explosion-proof valve control command is the preset valve opening command, so as to realize the explosion-proof control of the battery pack.
[0087] The explosion-proof valve control system provided in this application, employing the explosion-proof valve control method in the above embodiments, can solve the technical problem of poor explosion-proof valve control effect. Compared with an optional embodiment, the beneficial effects of the explosion-proof valve control system provided in this application are the same as those of the explosion-proof valve control method provided in the above embodiments, and other technical features in the explosion-proof valve control system are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.
[0088] This application provides a battery pack, which includes: the aforementioned explosion-proof valve control system (it is worth noting that the subsequent processor and memory can be set in the system base chip of the explosion-proof valve control system), at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the explosion-proof valve control method in the above embodiment 1.
[0089] Referring now to Figure 5, a schematic diagram of a battery pack suitable for implementing embodiments of this application is shown. The battery pack in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. The battery pack shown in Figure 5 is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.
[0090] As shown in Figure 5, the battery pack may include a processing system 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in read-only memory (ROM) 1002 or a program loaded from storage system 1003 into random access memory (RAM) 1004. RAM 1004 also stores various programs and data required for battery pack operation. The processing system 1001, ROM 1002, and RAM 1004 are interconnected via bus 1005. Input / output interface 1006 is also connected to the bus. Typically, the following systems can be connected to input / output interface 1006: input system 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output system 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage system 1003 including, for example, magnetic tape, hard disk, etc.; and communication system 1009. The communication system 1009 allows the battery pack to communicate wirelessly or wiredly with other devices to exchange data. While the figure shows a battery pack with various systems, it should be understood that implementation or possession of all the systems shown is not required. More or fewer systems may be implemented alternatively.
[0091] According to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication system, or installed from storage system 1003, or installed from read-only memory 1002. When the computer program is executed by processing system 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.
[0092] The battery pack provided in this application, employing the explosion-proof valve control method described in the above embodiments, can solve the technical problem of poor explosion-proof valve control performance. Compared with an optional embodiment, the beneficial effects of the battery pack provided in this application are the same as those of the explosion-proof valve control method provided in the above embodiments, and other technical features of this battery pack are the same as those disclosed in the previous embodiment method, and will not be repeated here.
[0093] The various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.
[0094] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
[0095] This application provides a vehicle that includes the aforementioned battery pack, wherein the battery pack is used to perform the steps of the aforementioned explosion-proof valve control method.
[0096] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the explosion-proof valve control method in the above embodiments.
[0097] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.
[0098] The aforementioned computer-readable storage medium may be included in the battery pack; or it may exist independently and not assembled into the battery pack.
[0099] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the battery pack, cause the battery pack to:
[0100] The thermal runaway detection device collects thermal runaway information from the battery pack and determines the explosion-proof valve control command based on the thermal runaway information and the preset thermal runaway gas pressure state.
[0101] When the explosion-proof valve control command is the preset valve opening command, the electric explosion-proof valve is opened according to the explosion-proof valve control command to realize the explosion-proof control of the battery pack.
[0102] Computer program code for performing the operations of this application can be written in one or more programming languages or a combination thereof, including object-oriented programming languages such as Java, Smalltalk, and C++, and conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).
[0103] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.
[0104] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.
[0105] The computer-readable storage medium provided in this application stores computer-readable program instructions (i.e., a computer program) for executing the above-described explosion-proof valve control method, which can solve the technical problem of poor explosion-proof valve control effect. Compared with an optional embodiment, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the explosion-proof valve control method provided in the above embodiments, and will not be repeated here.
[0106] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the explosion-proof valve control method described above.
[0107] The computer program product provided in this application can solve the technical problem of poor control effect of explosion-proof valves. Compared with an optional embodiment, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the explosion-proof valve control method provided in the above embodiments, and will not be repeated here.
[0108] The above are only some embodiments of this application and do not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.
Claims
1. A method for controlling an explosion-proof valve, comprising: the method being applied to an explosion-proof valve control system mounted on a battery pack; the explosion-proof valve control system comprising an electric explosion-proof valve and a thermal runaway detection device; the explosion-proof valve control method comprising: The thermal runaway detection device acquires thermal runaway information of the battery pack and determines the explosion-proof valve control command based on the thermal runaway information and the preset thermal runaway gas pressure state. When the explosion-proof valve control command is a preset valve opening command, the electric explosion-proof valve is opened according to the explosion-proof valve control command to realize the explosion-proof control of the battery pack.
2. The explosion-proof valve control method as described in claim 1, wherein, The thermal runaway information includes the gas pressure status of each thermal runaway region within the battery pack. The step of determining the explosion-proof valve control command based on the thermal runaway information and the preset thermal runaway gas pressure status includes: For each thermal runaway region, the pressure state is checked to see if it matches the preset thermal runaway pressure state. When the pressure state matches the preset thermal runaway pressure state, the first thermal runaway region corresponding to the pressure state is determined, and the explosion-proof valve control command is determined according to the first thermal runaway region.
3. The explosion-proof valve control method as described in claim 1 or 2, wherein, The preset pressure threshold for thermal runaway gas pressure state is set lower than the opening pressure threshold of the mechanical explosion-proof valve, so that the electric explosion-proof valve opens in advance before the mechanical explosion-proof valve opens.
4. The explosion-proof valve control method as described in claim 2 or 3, wherein, The explosion-proof valve control system further includes a mechanical explosion-proof valve, and the step of determining the explosion-proof valve control command based on the first thermal runaway region includes: The target explosion-proof valve for the first thermal runaway region is determined, wherein the target explosion-proof valve includes at least one of the mechanical explosion-proof valve and the electric explosion-proof valve; When the electric explosion-proof valve is present in the target explosion-proof valve, the preset valve opening command is used as the explosion-proof valve control command of the first electric explosion-proof valve, wherein the first electric explosion-proof valve is the electric explosion-proof valve installed in the first thermal runaway zone. If the electric explosion-proof valve is not present in the target explosion-proof valve, but the mechanical explosion-proof valve is present, then the adjacent thermal runaway region of the first thermal runaway region is determined, and the second electric explosion-proof valve of the adjacent thermal runaway region is determined. The preset valve opening command is used as the explosion-proof valve control command of the second electric explosion-proof valve, wherein the second electric explosion-proof valve is the electric explosion-proof valve installed in the adjacent thermal runaway region.
5. The explosion-proof valve control method as described in claim 4, wherein, The adjacent thermal runaway region is determined based on the priority trade-off between the closest exhaust distance and the optimal exhaust channel in the cell design structure.
6. The explosion-proof valve control method as described in claim 4 or 5, further comprising: The installation area of the electric explosion-proof valve on the battery pack and the cell design structure inside the battery pack are determined, and a second thermal runaway region on the battery pack is determined based on the installation area, wherein the second thermal runaway region includes a thermal runaway region where the electric explosion-proof valve does not exist; Based on the cell design structure and the preset optimal exhaust path strategy, a third thermal runaway region corresponding to each second thermal runaway region is determined, and the third thermal runaway region is taken as the adjacent thermal runaway region of the second thermal runaway region. The third thermal runaway region includes the thermal runaway region where the electric explosion-proof valve exists. The optimal exhaust path strategy includes the strategy of exhaust distance closest and exhaust distance optimal based on the cell design structure.
7. The explosion-proof valve control method according to any one of claims 2 to 6, wherein, After the step of detecting whether the gas pressure state of each thermal runaway region matches a preset thermal runaway gas pressure state, the following steps are included: When the gas pressure state of all the thermal runaway regions does not match the preset thermal runaway gas pressure state, the preset valve closing command will be used as the explosion-proof valve control command for all the electric explosion-proof valves.
8. The explosion-proof valve control method according to any one of claims 2 to 6, wherein, After the step of detecting whether the gas pressure state of each thermal runaway region matches a preset thermal runaway gas pressure state, the following steps are included: Obtain the valve status of each thermal runaway region at the previous moment. If the gas pressure status of the thermal runaway region does not match the preset thermal runaway gas pressure status, and the valve status matches the preset open status, then determine the third electric explosion-proof valve corresponding to the thermal runaway region, and use the preset valve closing command as the explosion-proof valve control command of the third electric explosion-proof valve.
9. The explosion-proof valve control method as described in claim 7 or 8, wherein, For the second electric explosion-proof valve, which is located near the thermal runaway region, the valve closing conditions include: the corresponding thermal runaway region and the first thermal runaway region assisted by the second electric explosion-proof valve for venting are no longer in a thermal runaway state.
10. The explosion-proof valve control method according to any one of claims 1 to 9, wherein, After the step of determining the explosion-proof valve control command based on the thermal runaway information and the preset thermal runaway gas pressure state, the following steps are included: When the explosion-proof valve control command is a preset valve closing command, the target valve closing explosion-proof valve corresponding to the explosion-proof valve control command is determined, and the target valve closing explosion-proof valve is controlled to close based on the valve closing command.
11. The explosion-proof valve control method according to any one of claims 1 to 10, wherein, The explosion-proof valve control system further includes a battery pack parameter acquisition device, and the explosion-proof valve control method further includes: The battery pack parameters collected by the battery pack parameter acquisition device are obtained, and it is detected whether the battery pack parameters match the preset valve opening conditions. The battery pack parameters include at least one of the following: cell voltage, battery pack temperature, battery pack voltage, battery pack communication, and battery pack current. When at least one parameter in the battery pack parameters matches a preset valve opening condition, and the explosion-proof valve control command is a preset valve opening command, the electric explosion-proof valve is controlled to open.
12. The explosion-proof valve control method as described in claim 7, wherein, The electric explosion-proof valve, triggered by battery pack parameters, has a preset delayed closing time to avoid accidental opening due to abnormal parameters.
13. An explosion-proof valve control system, wherein, The explosion-proof valve control system includes an electric explosion-proof valve, a thermal runaway detection device, and an explosion-proof valve controller mounted on the battery pack. The explosion-proof valve controller is connected to the electric explosion-proof valve and the thermal runaway detection device. The explosion-proof valve controller includes: The information acquisition module is configured to acquire thermal runaway information of the battery pack collected by the thermal runaway detection device, and determine the explosion-proof valve control command based on the thermal runaway information and the preset thermal runaway gas pressure state. The explosion-proof control module is configured to control the opening of the electric explosion-proof valve according to the preset valve opening command when the explosion-proof valve control command is the preset valve opening command, so as to realize the explosion-proof control of the battery pack.
14. A battery pack, wherein, The battery pack includes an explosion-proof valve control system, a processor, and a memory. The memory stores an explosion-proof valve control method program that can run on the processor. When the explosion-proof valve control method program is executed by the processor, it implements the steps of the explosion-proof valve control method as described in any one of claims 1 to 12.
15. A vehicle, wherein, The vehicle includes the battery pack as claimed in claim 14, wherein the battery pack is configured to perform the steps of the explosion-proof valve control method as claimed in any one of claims 1 to 12.