Explosion-proof valve state recognition method and system, vehicle and computer readable storage medium

Abstract

The invention discloses an anti-explosion valve state recognition method and system, a vehicle and a computer readable storage medium, and relates to the technical field of anti-explosion valves, and the anti-explosion valve state recognition method is applied to the anti-explosion valve state recognition system arranged on the vehicle. The anti-explosion valve state recognition system comprises at least one mechanical anti-explosion valve, a thermal runaway acquisition module, a battery pack and an anti-explosion valve state recognition circuit, the mechanical anti-explosion valves and the thermal runaway acquisition module are arranged on the battery pack, and the anti-explosion valve state recognition circuit is connected with conduction monitoring devices in all the mechanical anti-explosion valves. A circuit output signal output by an explosion-proof valve state identification circuit is obtained, and the circuit output signal comprises a valve opening wake-up signal output when a conduction monitoring device is in a connection state; and under the control of the valve opening wake-up signal, thermal runaway information collected by the thermal runaway collection module is obtained, and the opening state of the mechanical anti-explosion valve is determined according to the thermal runaway information. The use functionality of the mechanical anti-explosion valve is improved.

Description

Technical Field

[0001] The present application relates to the technical field of explosion-proof valves, and in particular to an explosion-proof valve state identification method, system, vehicle and computer-readable storage medium. Background Art

[0002] With the popularization of mechanical explosion-proof valves in different fields, users have also put forward higher requirements on the identification method of the opening status of mechanical explosion-proof valves.

[0003] Traditional mechanical explosion-proof valves do not identify the opening state during use, and there is a phenomenon that the actual opening state of the mechanical explosion-proof valve cannot be determined. That is, this type of explosion-proof valve cannot determine the actual opening state of the mechanical explosion-proof valve (the reason for the opening state), which results in low functionality of the mechanical explosion-proof valve.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present application is to provide a method, system, vehicle and computer-readable storage medium for identifying the state of an explosion-proof valve, aiming to solve the technical problem that the functionality of mechanical explosion-proof valves is not high.

[0006] To achieve the above-mentioned purpose, the present application provides an explosion-proof valve state identification method, which is applied to an explosion-proof valve state identification system, wherein the explosion-proof valve state identification system includes at least one mechanical explosion-proof valve, a thermal runaway acquisition module, a battery pack, and an explosion-proof valve state identification circuit, wherein the mechanical explosion-proof valve and the thermal runaway acquisition module are arranged on the battery pack, and the explosion-proof valve state identification circuit is connected to the conduction monitoring device in all the mechanical explosion-proof valves, and the explosion-proof valve state identification method includes:

[0007] Acquire a circuit output signal output by the explosion-proof valve state identification circuit, wherein the circuit output signal includes a valve opening wake-up signal output when the conduction monitoring device is in a connected state;

[0008] Under the control of the valve opening wake-up signal, the thermal runaway information collected by the thermal runaway collection module is obtained, and the opening state of the mechanical explosion-proof valve is determined according to the thermal runaway information.

[0009] In one embodiment, when each of the conduction monitoring devices is in a centralized output state, the thermal runaway information includes a first voltage change value and a first temperature value of the battery pack, and the step of determining the opening state of the mechanical explosion-proof valve according to the thermal runaway information includes:

[0010] When the first voltage change value is greater than a preset first voltage change threshold, or the first temperature value is greater than a preset first temperature threshold, determining that the opening state of the mechanical explosion-proof valve is a thermal runaway state;

[0011] When the first voltage change value is less than or equal to a preset first voltage change threshold, and the first temperature value is less than or equal to a preset first temperature threshold, it is determined that the opening state of the mechanical explosion-proof valve is an airtight failure state.

[0012] In one embodiment, when each of the conduction monitoring devices is in an independent output state, the step of determining the opening state of the mechanical explosion-proof valve according to the thermal runaway information further includes:

[0013] Determine a target mechanical explosion-proof valve corresponding to the valve-opening wake-up signal, and determine a target setting area of ​​the target mechanical explosion-proof valve on the battery pack, wherein the target mechanical explosion-proof valve includes a mechanical explosion-proof valve corresponding to the conduction monitoring device in a connected state;

[0014] The target thermal runaway information corresponding to each of the target setting areas is determined in the thermal runaway information, and the opening state of the target mechanical explosion-proof valve is determined according to the target thermal runaway information.

[0015] In one embodiment, the target thermal runaway information includes a second voltage change value and a second temperature value of the target setting area, and the step of determining the opening state of the target mechanical explosion-proof valve according to the target thermal runaway information includes:

[0016] For each of the target mechanical explosion-proof valves, determining a second voltage change threshold and a second temperature threshold in a voltage-temperature threshold table;

[0017] When the second voltage change value is greater than the second voltage change threshold, or the second temperature value is greater than the second temperature threshold, determining that the opening state of the target mechanical explosion-proof valve is a thermal runaway state;

[0018] When the second voltage change value is less than or equal to the second voltage change threshold, and the second temperature value is less than or equal to the second temperature threshold, it is determined that the opening state of the target mechanical explosion-proof valve is an airtight failure state.

[0019] In one embodiment, the step of acquiring the thermal runaway information collected by the thermal runaway collection module under the control of the valve opening wake-up signal includes:

[0020] Acquire the real-time status of the explosion-proof valve status identification system, wherein the real-time status of the system includes a power-on status and a power-off status;

[0021] When the real-time state of the system is the power-on state, triggering an acquisition instruction based on the valve opening wake-up signal, and acquiring the thermal runaway information acquired by the thermal runaway acquisition module based on the acquisition instruction;

[0022] When the real-time state of the system is the power-off state, the explosion-proof valve state identification system is awakened based on the valve opening wake-up signal, and based on the awakened explosion-proof valve state identification system, the thermal runaway information collected by the thermal runaway collection module is acquired.

[0023] In one embodiment, after the step of obtaining the circuit output signal output by the explosion-proof valve state identification circuit, the following steps are included:

[0024] When the circuit output signal is a circuit conduction signal, determining that the circuit output signal is a valve opening wake-up signal output when the conduction monitoring device is in a connected state;

[0025] When the circuit output signal is a circuit cutoff signal, it is determined that the circuit output signal is a valve closing standby signal output when the conduction monitoring device is in a disconnected state.

[0026] In one embodiment, after the step of obtaining the circuit output signal output by the explosion-proof valve state identification circuit, the following steps are included:

[0027] When the circuit output signal is a valve opening wake-up signal, determining a real-time power value of the valve opening wake-up signal, and determining a real-time connection state corresponding to the real-time power value in a preset power correspondence table;

[0028] The opening state of the mechanical explosion-proof valve is determined based on the real-time connection state.

[0029] In addition, to achieve the above-mentioned purpose, the present application also provides an explosion-proof valve state identification system, the explosion-proof valve state identification system includes at least one mechanical explosion-proof valve, a thermal runaway acquisition module, a battery pack, an explosion-proof valve state identification circuit and a battery management chip, the mechanical explosion-proof valve and the thermal runaway acquisition module are arranged on the battery pack, wherein the explosion-proof valve state identification circuit is connected to the conduction monitoring device in all the mechanical explosion-proof valves, the battery management chip is connected to the conduction monitoring device, the thermal runaway acquisition module and the explosion-proof valve state identification circuit, and the battery management chip includes:

[0030] An information acquisition module, used to acquire a circuit output signal output by the explosion-proof valve state identification circuit, wherein the circuit output signal includes a valve opening wake-up signal output when the conduction monitoring device is in a connected state;

[0031] A state recognition module is used to obtain the thermal runaway information collected by the thermal runaway collection module under the control of the valve opening wake-up signal, and determine the opening state of the mechanical explosion-proof valve according to the thermal runaway information.

[0032] In addition, to achieve the above-mentioned purpose, the present application also provides a vehicle, including an explosion-proof valve status identification system, a processor and a memory, and an explosion-proof valve status identification method program stored in the memory and executable by the processor, wherein when the explosion-proof valve status identification method program is executed by the processor, the steps of the explosion-proof valve status identification method as described above are implemented.

[0033] The present application also provides a computer-readable storage medium, on which is stored a method program for identifying the state of an explosion-proof valve. When the method program for identifying the state of an explosion-proof valve is executed by a processor, the steps of the method for identifying the state of an explosion-proof valve as described above are implemented.

[0034] The embodiment of the present application provides a method for identifying the state of an explosion-proof valve, which is applied to an explosion-proof valve state identification system, wherein the explosion-proof valve state identification system includes at least one mechanical explosion-proof valve, a thermal runaway acquisition module, a battery pack and an explosion-proof valve state identification circuit, wherein the mechanical explosion-proof valve and the thermal runaway acquisition module are arranged on the battery pack, wherein the explosion-proof valve state identification circuit is connected to the conduction monitoring devices in all the mechanical explosion-proof valves, and the circuit output signal output by the explosion-proof valve state identification circuit is obtained, wherein the circuit output signal includes a valve opening wake-up signal output when the conduction monitoring device is in a connected state; under the control of the valve opening wake-up signal, the thermal runaway information collected by the thermal runaway acquisition module is obtained, and the opening state of the mechanical explosion-proof valve is determined according to the thermal runaway information. This explosion-proof valve state identification method The method determines the opening state of the mechanical explosion-proof valve based on the thermal runaway information when a valve opening wake-up signal (power supply to wake up the control chip of the entire explosion-proof valve state identification system) is provided through the connection relationship between the explosion-proof valve state identification circuit and the conduction monitoring device in the mechanical explosion-proof valve in the explosion-proof valve state identification system, and then obtains the circuit output signal output by the explosion-proof valve state identification circuit, thereby avoiding the problem of being unable to determine the actual opening state of the mechanical explosion-proof valve. The method determines the opening state of the mechanical explosion-proof valve based on the connection relationship between the explosion-proof valve state identification circuit and the conduction monitoring device in the mechanical explosion-proof valve in the explosion-proof valve state identification system, and combines the obtained valve opening wake-up signal and thermal runaway information, thereby determining the actual opening state of the mechanical explosion-proof valve, thereby improving the functionality of the mechanical explosion-proof valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a flow chart of the first embodiment of the explosion-proof valve status identification method of the present application;

[0036] Figure 2 This is a schematic diagram of the framework of the first embodiment of the explosion-proof valve status identification system of the present application;

[0037] Figure 3 A physical schematic diagram of the mechanical explosion-proof valve of this application;

[0038] Figure 4 A physical schematic diagram of a conduction monitoring device on a mechanical explosion-proof valve of the present application;

[0039] Figure 5 A schematic diagram of a process of the explosion-proof valve status identification method of the present application;

[0040] Figure 6 This is another flow chart of the explosion-proof valve status identification method of the present application;

[0041] Figure 7 This is a module diagram of the basic chip of the system of this application;

[0042] Figure 8 This is a schematic diagram of the device structure of the hardware operating environment involved in this application.

[0043] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

[0044] Description of Figure Numbers:

[0045] 100. explosion-proof valve control circuit; 10. low-voltage power supply; 20. battery management chip; 200. battery pack; 300. mechanical explosion-proof valve; 320. conduction monitoring device; 1. shell; 2. spring; 3. guide rod; 4. body; 5. cover; 6. piston; 7. sealing ring; 81. micro-switch pushing part; 82. micro-switch body; 1001. processing device; 1002. read-only memory; 1003. storage device; 1004. random access memory; 1005. bus; 1006. input / output interface; 1007. input device; 1008. output device; 1009. communication device. DETAILED DESCRIPTION

[0046] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0047] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0048] The operating principle of the existing mechanical explosion-proof valve is: the sealing of the explosion-proof valve body is ensured by the upper cover and the sealing ring, and the guide rod and the spring are placed in the explosion-proof valve housing. The guide rod is connected to the spring to ensure the opening and closing of the explosion-proof valve, that is, the opening and closing of the explosion-proof valve is achieved by the expansion and contraction of the spring. Its movement principle is that when thermal runaway occurs in the battery pack (assuming that the battery pack is to be vented and exploded, of course, other products can be vented and exploded) and the pressure in the pack increases, after the pressure increases to a certain level, the pressure in the pack overcomes the elastic force of the spring and pushes the guide rod to move outward. At this time, the explosion-proof valve opens to release the pressure in the pack; when the pressure in the pack decreases to a certain level, the spring rebounds and pushes the guide rod inward, and the explosion-proof valve closes. It can be seen from the above working and operating principles that in the entire working process of the mechanical explosion-proof valve, there is no problem of detecting the actual use status (open state and closed state) of the explosion-proof valve (generally, if the actual use status needs to be known, various sensors are used to detect the open state, which will result in a problem of high overall detection cost), and there is no problem of detecting the actual open state of the mechanical explosion-proof valve (open state due to what reason), which results in low functionality of the mechanical explosion-proof valve.

[0049] Therefore, based on the above shortcomings of mechanical explosion-proof valves, an explosion-proof valve state identification method of the present application is proposed. The solution of the embodiment of the present application is: through the connection relationship between the explosion-proof valve state identification circuit in the explosion-proof valve state identification system and the conduction monitoring device in the mechanical explosion-proof valve, and then based on the circuit output signal output by the explosion-proof valve state identification circuit, when the valve opening wake-up signal (power supply wakes up the control chip of the entire explosion-proof valve state identification system), the opening state of the mechanical explosion-proof valve is determined by the thermal runaway information, and the problem of being unable to determine the actual opening state of the mechanical explosion-proof valve is avoided, and the opening state of the mechanical explosion-proof valve is determined by the connection relationship between the explosion-proof valve state identification circuit in the explosion-proof valve state identification system and the conduction monitoring device in the mechanical explosion-proof valve, and combined with the obtained valve opening wake-up signal and thermal runaway information, and then the actual opening state of the mechanical explosion-proof valve can be determined, so as to improve the functionality of the mechanical explosion-proof valve.

[0050] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer or a mobile phone, or a device capable of realizing the above functions, an internal controller of an explosion-proof valve (such as a controller in a BMS (Battery Management System)), etc. The following takes the internal controller of a vehicle as an example to illustrate this embodiment and the following embodiments.

[0051] Based on this, the embodiment of the present application provides a method for identifying the state of an explosion-proof valve, referring to Figure 1 , Figure 1This is a flow chart of the first embodiment of the explosion-proof valve status identification method of the present application.

[0052] Reference Figure 1 The present application provides an explosion-proof valve state identification method. In a first embodiment of the explosion-proof valve state identification method, the explosion-proof valve state identification method is applied to an explosion-proof valve state identification system. The explosion-proof valve state identification system includes at least one mechanical explosion-proof valve, a thermal runaway acquisition module, a battery pack, and an explosion-proof valve state identification circuit. The mechanical explosion-proof valve and the thermal runaway acquisition module are arranged on the battery pack. The explosion-proof valve state identification circuit is connected to the conduction monitoring devices in all the mechanical explosion-proof valves. The explosion-proof valve state identification method includes:

[0053] Step S10, obtaining a circuit output signal output by the explosion-proof valve state identification circuit, wherein the circuit output signal includes a valve opening wake-up signal output when the conduction monitoring device is in a connected state;

[0054] For example, refer to Figure 2 , Figure 2 This is a schematic diagram of the framework of the first embodiment of the explosion-proof valve status identification system of the present application. The entire explosion-proof valve status identification system includes at least one mechanical explosion-proof valve 300, a battery pack 200 and an explosion-proof valve control circuit 100. The mechanical explosion-proof valve 300 is arranged on the battery pack 200 (meaning that the exhaust input port of the mechanical explosion-proof valve 300 faces the inside of the battery pack 200, and the exhaust output port of the mechanical explosion-proof valve 300 faces the outside of the battery pack 200 to achieve exhaust). At the same time, a conduction monitoring device 320 is provided on each mechanical explosion-proof valve 300 to display the open or closed state of the mechanical explosion-proof valve 300 through the conduction monitoring device 320 (actually a product of two states based on whether the mechanical explosion-proof valve 300 is opened or closed to achieve different connection or output states, such as the commonly used switch pressed and not pressed to achieve two different states, that is, the switch can be selected as the conduction monitoring device 320). Further, please refer to Figure 3 , Figure 3This is a physical schematic diagram of the mechanical explosion-proof valve of the present application. The hardware composition of the mechanical explosion-proof valve consists of a valve body and a movable part, and an exhaust channel is arranged on the valve body. The valve body is provided with a vent and an avoidance port connected to the exhaust channel. The vent refers to a port arranged outside the battery pack for exhausting gas, and the avoidance port refers to a port arranged inside the battery pack for absorbing gas in the battery pack. The movable part can be movably arranged in the exhaust channel (that is, it moves in the exhaust channel to open the vent), and is used to open the vent under the pressure of the battery pack, thereby releasing the gas in the battery pack. It is worth mentioning that the vent and the avoidance port (can also be other normally open openings for exhausting the battery pack) can be arranged on opposite sides of the valve body, and the movable part is arranged relative to the avoidance port along the movable direction, so that the conduction monitoring device can be controlled to be in a connected state when the movable part moves, and conversely, the conduction monitoring device can be controlled to be in a disconnected state when the movable part does not move, so as to determine the actual use state of the mechanical explosion-proof valve based on the state of the conduction monitoring device, because the actual use state of the mechanical explosion-proof valve is formed according to whether the movable part moves, and thus the state of different conduction monitoring devices can be determined based on whether the movable part moves, so as to inform the battery management chip of the actual use state of the mechanical explosion-proof valve at this time based on the state of the conduction monitoring device, and thus the actual use state of the mechanical explosion-proof valve can be detected at a low cost. The conduction monitoring device can be fixed on the valve body and can be connected to the movable part through the avoidance port, wherein the avoidance port is used to avoid at least one of the conduction monitoring device and the movable part, that is, the valve body includes a shell 1 and a main body 4, and an internal exhaust channel. At this time, the conduction monitoring device is fixed on the shell 1 and connected to the movable part, and then when the movable part moves, the state of the conduction monitoring device is driven to change, so that the conduction monitoring device is in different states, and then the voltage output to the battery management chip in different states is different, so that when the low-voltage power supply is connected to the battery management chip, it is determined that the mechanical explosion-proof valve is opened, otherwise it is determined that the mechanical explosion-proof valve is closed, wherein the avoidance port is used to avoid at least one of the conduction monitoring device and the movable part, which is similar to setting at least one of the conduction monitoring device and the movable part. In another embodiment, the movable part includes a cover body 5 and a guide rod 3 connected to each other. The cover body 5 can be movably arranged at the air vent (sealed using a sealing ring 7 and a piston 6). The avoidance port and the end of the guide rod 3 away from the cover body 5 are opposite to each other. The conduction monitoring device is fixed on the valve body and connected to the inner side of the cover body 5, that is, at this time, the side of the movable part close to the air vent is connected. It is worth noting that because the conduction monitoring device itself detects the movement of the movable part, it can be connected to any part of the movable part and is not limited here.

[0055] In one embodiment, the internal design of the conduction monitoring device can include three conduction connection positions, namely the first to third conduction connection positions. At this time, the first conduction connection position is connected to the positive pole of the low-voltage power supply, the second conduction connection position is connected to the third end of the battery management chip, and the third conduction connection position is suspended. Therefore, when the mechanical explosion-proof valve is opened, the first conduction connection position establishes a connection with the second conduction connection position and disconnects from the third conduction connection position, so that the low-voltage power supply powers the battery management chip to wake it up; when the mechanical explosion-proof valve is closed, the first conduction connection position establishes a connection with the third conduction connection position and disconnects from the second conduction connection position, so that the low-voltage power supply cannot power the battery management chip, and the battery management chip is in standby state, that is, the entire conduction monitoring device is similar to a selector function. It is worth noting that the first conductive connection position includes a stepped movable conductive medium, or the second conductive connection position includes a stepped movable conductive medium, which refers to a conductive material that is stepped and can move up and down except for the lowest step, so that the movement distance of the movable part can be reflected as the contact distance between the first conductive connection position and the second conductive connection position, and the opening of the mechanical explosion-proof valve can be determined to ensure the functionality of the mechanical explosion-proof valve. Further, reference can be made to Figure 4 , Figure 4 This is a physical schematic diagram of the conduction monitoring device on the mechanical explosion-proof valve of the present application. The conduction monitoring device can be a micro-switch. The micro-switch body 82 can be fixed on the shell 1. The micro-switch pushing part 81 is connected to the movable part through the avoidance port. When the movable part moves, the micro-switch pushing part 81 is controlled to move, so that the conduction monitoring device is in different states, thereby determining the actual use status of the mechanical explosion-proof valve.

[0056] In this embodiment, the principle of the explosion-proof valve state identification circuit is that due to the different states of the conduction monitoring device, the explosion-proof valve state identification circuit outputs different voltages to the battery management chip (the control center of the explosion-proof valve state identification system) in the explosion-proof valve state identification system, and then the battery management chip determines the actual use state of the mechanical explosion-proof valve based on different voltages (i.e., whether the low voltage in the explosion-proof valve state identification circuit is output to the battery management chip), and then collects relevant information in the actual use state to determine the actual opening state, without using related sensors to increase the cost of the entire identification. Among them, the conduction monitoring device is used for different motion states of the moving part, such as when the moving part is not moving, the conduction monitoring device is in a closed state, and when the moving part is moving, the conduction monitoring device is in an open state. When it is necessary to judge the actual opening state, the circuit output signal of the explosion-proof valve state identification circuit will be obtained, that is, the level output to the battery management chip, which is generally an output or non-output level, that is, the circuit output signal includes a valve opening wake-up signal output when the conduction monitoring device is in a connected state, and a valve closing standby signal output when the conduction monitoring device is in a disconnected state (the valve closing standby signal does not perform the subsequent actual opening state determination step, but continues with the next step of obtaining the circuit output signal), and then the actual opening state can be determined based on different signals to improve the functionality of the mechanical explosion-proof valve.

[0057] Step S20, under the control of the valve opening wake-up signal, the thermal runaway information collected by the thermal runaway collection module is obtained, and the opening state of the mechanical explosion-proof valve is determined according to the thermal runaway information.

[0058] In this embodiment, the thermal runaway information collected by the thermal runaway collection module is obtained under the control of the valve opening wake-up signal, and then it can be determined whether the mechanical explosion-proof valve in the open state is in a thermal runaway state based on the thermal runaway information. On the one hand, the thermal runaway information is directly obtained under the control of the valve opening wake-up signal (the whole system is in a powered-on state at this time), and on the other hand, the thermal runaway information is obtained after the whole system is powered on under the control of the valve opening wake-up signal (the whole system is in a powered-off state at this time), and then it is determined whether it is a thermal runaway through the voltage, temperature, and / or current information in the thermal runaway information (that is, various information collected in the battery pack). If at least one of the voltage, temperature, and / or current meets the thermal runaway condition (the voltage, temperature, and current thresholds under thermal runaway are set), it is determined that the opening of the mechanical explosion-proof valve is a thermal runaway at this time. On the contrary, if the voltage, temperature, and / or current do not meet the thermal runaway condition, it is determined that the opening of the mechanical explosion-proof valve is an airtight failure at this time, and then the opening state of the mechanical explosion-proof valve can be determined to improve the functionality of the mechanical explosion-proof valve.

[0059] In the present embodiment, a method for identifying the state of an explosion-proof valve is provided, which is applied to an explosion-proof valve state identification system. The explosion-proof valve state identification system includes at least one mechanical explosion-proof valve, a thermal runaway acquisition module, a battery pack and an explosion-proof valve state identification circuit. The mechanical explosion-proof valve and the thermal runaway acquisition module are arranged on the battery pack. The explosion-proof valve state identification circuit is connected to the conduction monitoring devices in all the mechanical explosion-proof valves. By acquiring a circuit output signal output by the explosion-proof valve state identification circuit, wherein the circuit output signal includes a valve opening wake-up signal output when the conduction monitoring device is in a connected state; under the control of the valve opening wake-up signal, the thermal runaway information acquired by the thermal runaway acquisition module is acquired, and the opening state of the mechanical explosion-proof valve is determined according to the thermal runaway information. This method for identifying the state of an explosion-proof valve Through the connection relationship between the explosion-proof valve state identification circuit and the conduction monitoring device in the mechanical explosion-proof valve in the explosion-proof valve state identification system, and then based on the circuit output signal output by the explosion-proof valve state identification circuit, when the valve opening wake-up signal (power supply to wake up the control chip of the entire explosion-proof valve state identification system) is provided, the opening state of the mechanical explosion-proof valve is determined based on the thermal runaway information, thereby avoiding the problem of being unable to determine the actual opening state of the mechanical explosion-proof valve. The opening state of the mechanical explosion-proof valve is determined through the connection relationship between the explosion-proof valve state identification circuit and the conduction monitoring device in the mechanical explosion-proof valve in the explosion-proof valve state identification system, and combined with the obtained valve opening wake-up signal and thermal runaway information, and then the actual opening state of the mechanical explosion-proof valve can be determined, thereby improving the functionality of the mechanical explosion-proof valve.

[0060] Further, based on the first embodiment of the present application, a second embodiment of the explosion-proof valve state identification method of the present application is proposed. In this embodiment, in the above step S20, when each conduction monitoring device is in a centralized output state, the thermal runaway information includes a first voltage change value and a first temperature value of the battery pack, and the step of determining the opening state of the mechanical explosion-proof valve according to the thermal runaway information includes:

[0061] Step S201, when the first voltage change value is greater than a preset first voltage change threshold, or the first temperature value is greater than a preset first temperature threshold, determining that the opening state of the mechanical explosion-proof valve is a thermal runaway state;

[0062] Step S202, when the first voltage change value is less than or equal to the preset first voltage change threshold, and the first temperature value is less than or equal to the preset first temperature threshold, determining that the opening state of the mechanical explosion-proof valve is an airtight failure state.

[0063] In this embodiment, because the explosion-proof valve state identification circuit can connect all the conduction monitoring devices to one port of the battery management chip, that is, at this time, the battery management chip can only know that there is a mechanical explosion-proof valve open, but does not know which mechanical explosion-proof valve it is, that is, at this time, each conduction monitoring device is in a centralized output state, that is, all are output to one port of the battery management chip. At this time, the thermal runaway information includes the first voltage change value and the first temperature value of the battery pack, that is, the user defines the temperature and voltage value of a certain position in the battery pack in advance as the first voltage change value of the battery pack (referring to the collected voltage change value in the battery pack, which can be collected based on the original devices in the battery pack) and the first temperature value (referring to the collected temperature value in the battery pack, which can be collected based on the original devices in the battery pack), and can also be used to take the average of all the temperature and voltage values ​​in the battery pack as the first voltage change value and the first temperature value of the battery pack, which is not limited here. The commonly used technology is generally to determine whether the mechanical explosion-proof valve is open based on the original device, and then to determine the reason for the opening, but at this time it is necessary to design a more complex program, that is, it is necessary to compile it on the original program, and the present application can be completed based on simple structural improvements and a separate program (the key is that there is no need to use related sensors to determine whether the mechanical explosion-proof valve is open, because the principle of the mechanical explosion-proof valve itself is based on air pressure opening, and the opening threshold is the parameter of the mechanical explosion-proof valve itself, so the mechanical explosion-proof valve itself does not have an opening air pressure detection process). Furthermore, when the first voltage change value is greater than the preset first voltage change threshold, or the first temperature value is greater than the preset first temperature threshold, it is determined that the mechanical explosion-proof valve is opened due to thermal runaway at this time, and the opening state of the mechanical explosion-proof valve is determined to be a thermal runaway state, wherein the first voltage change threshold refers to the voltage change value preset by the user under thermal runaway, and the first temperature threshold is the temperature value preset by the user under thermal runaway; and when the first voltage change value is less than or equal to the preset first voltage change threshold, and the first temperature value is less than or equal to the preset first temperature threshold, it is determined that the mechanical explosion-proof valve is opened due to non-thermal runaway (generally airtight failure, that is, the airtightness of the mechanical explosion-proof valve is destroyed) at this time, and the opening state of the mechanical explosion-proof valve is determined to be an airtight failure state. Of course, it can also be judged by other parameters, such as current, etc., and the opening state of the mechanical explosion-proof valve can be determined based on the thermal runaway information to improve the functionality of the mechanical explosion-proof valve.

[0064] Further, based on the first embodiment and / or the second embodiment of the present application, a third embodiment of the explosion-proof valve state identification method of the present application is proposed. In this embodiment, the above step S20, when each conduction monitoring device is in an independent output state, determines the opening state of the mechanical explosion-proof valve according to the thermal runaway information, and further includes:

[0065] Step S211, determining a target mechanical explosion-proof valve corresponding to the valve opening wake-up signal, and determining a target setting area of ​​the target mechanical explosion-proof valve on the battery pack, wherein the target mechanical explosion-proof valve includes a mechanical explosion-proof valve corresponding to the conduction monitoring device in a connected state;

[0066] Step S212, determining target thermal runaway information corresponding to each target setting area in the thermal runaway information, and determining the opening state of the target mechanical explosion-proof valve according to the target thermal runaway information.

[0067] In this embodiment, because the explosion-proof valve state identification circuit can connect all the conduction monitoring devices to a port of the battery management chip, the battery management chip can know that there is a mechanical explosion-proof valve open and which mechanical explosion-proof valve it is, that is, each conduction monitoring device is in an independent output state at this time, that is, each corresponds to an output to a port of the battery management chip. At this time, the target mechanical explosion-proof valve corresponding to the valve opening wake-up signal will be determined, and then the target setting area of ​​the target mechanical explosion-proof valve on the battery pack will be determined, wherein the target mechanical explosion-proof valve includes the mechanical explosion-proof valve corresponding to the conduction monitoring device in the connected state, and the target setting area refers to the area where the target mechanical explosion-proof valve is set on the battery pack. At this time, there may be multiple target mechanical explosion-proof valves, and then multiple target setting areas will be determined. Finally, the target thermal runaway information corresponding to each target setting area will be determined in the thermal runaway information, and then the opening state of the target mechanical explosion-proof valve will be determined for each target thermal runaway information, so as to ensure that each mechanical explosion-proof valve is accurately determined to be opened.

[0068] Further, the target thermal runaway information includes a second voltage change value and a second temperature value of the target setting area, and the step of determining the opening state of the target mechanical explosion-proof valve according to the target thermal runaway information includes:

[0069] Step S2121, for each target mechanical explosion-proof valve, determining a second voltage change threshold and a second temperature threshold in a voltage-temperature threshold table;

[0070] Step S2122, when the second voltage change value is greater than the second voltage change threshold, or the second temperature value is greater than the second temperature threshold, determining that the opening state of the target mechanical explosion-proof valve is a thermal runaway state;

[0071] Step S2123, when the second voltage change value is less than or equal to the second voltage change threshold, and the second temperature value is less than or equal to the second temperature threshold, determining that the opening state of the target mechanical explosion-proof valve is an airtight failure state.

[0072] In this embodiment, when determining the opening state of the target mechanical explosion-proof valve, a second voltage change threshold and a second temperature threshold are determined in the voltage-temperature threshold table for each target mechanical explosion-proof valve, wherein the voltage-temperature threshold table refers to a predefined thermal runaway condition for each area in which the mechanical explosion-proof valve is set, the second voltage change threshold refers to the voltage change value when thermal runaway occurs in the area corresponding to the target mechanical explosion-proof valve, and the second temperature threshold refers to the temperature value when thermal runaway occurs in the area corresponding to the target mechanical explosion-proof valve, thereby determining the opening state of each target mechanical explosion-proof valve. That is, when the second voltage change value is greater than the second voltage change threshold, or the second temperature value is greater than the second temperature threshold, it is determined that the mechanical valve is opened due to thermal runaway, and the opening state of the target mechanical explosion-proof valve is determined to be a thermal runaway state; conversely, when the second voltage change value is less than or equal to the second voltage change threshold, and the second temperature value is less than or equal to the second temperature threshold, it is determined that the mechanical valve is not opened due to thermal runaway, and the opening state of the target mechanical explosion-proof valve is determined to be an airtight failure state, and thus the opening state of each target mechanical explosion-proof valve can be accurately determined, and thus the actual situation of each area can be known, to ensure that the mechanical explosion-proof valve can understand the situation inside the battery pack, and thus expand the functionality of the mechanical explosion-proof valve.

[0073] Further, based on the first embodiment, the second embodiment and / or the third embodiment of the present application, a fourth embodiment of the explosion-proof valve state identification method of the present application is proposed. In this embodiment, under the control of the valve opening wake-up signal, the step of obtaining the thermal runaway information collected by the thermal runaway acquisition module includes:

[0074] Step a, obtaining the real-time status of the explosion-proof valve status identification system, wherein the real-time status of the system includes a power-on status and a power-off status;

[0075] Step b, when the real-time state of the system is a power-on state, triggering an acquisition instruction based on a valve opening wake-up signal, and acquiring thermal runaway information acquired by a thermal runaway acquisition module based on the acquisition instruction;

[0076] Step c, when the real-time state of the system is a power-off state, the explosion-proof valve state identification system is awakened based on the valve opening awakening signal, and based on the awakened explosion-proof valve state identification system, the thermal runaway information collected by the thermal runaway acquisition module is obtained.

[0077] In this embodiment, after determining that it is a valve opening wake-up signal, the entire process will be divided into two steps for processing, because the entire explosion-proof valve status identification system will have two states, namely the power-on state (the system is powered on normally) and the power-off state (the system is not powered on normally and the system is on standby). At this time, a certain value in the system can be directly determined. For example, when the power-on flag value is 1, it is determined to be a power-on state. On the contrary, when the power-on flag value is 0, it is determined to be a power-off state. It can also be other ways, which are not limited here. When the real-time state of the system is the power-on state, the acquisition instruction will be triggered based on the valve opening wake-up signal, and then the thermal runaway information collected by the thermal runaway acquisition module will be directly acquired based on the acquisition instruction. The acquisition instruction refers to the user-defined instruction for acquiring thermal runaway information. Because it is in the power-on state at this time, the thermal runaway information can be directly acquired based on the instruction. Please refer to Figure 5 , Figure 5 This is a flow chart of the explosion-proof valve status identification method of the present application. The whole vehicle (i.e., the explosion-proof valve status identification system on the whole vehicle) is in the power-on state. Assuming that before the air pressure inside and outside the battery pack changes drastically (exhaust explosion protection is not required), the mechanical explosion-proof valve is in a closed state. At this time, the conduction monitoring device integrated in the mechanical explosion-proof valve is in a disconnected state, and the battery management chip is not awakened. When the air pressure inside and outside the battery pack changes drastically (exhaust explosion protection is required), the mechanical explosion-proof valve is in an open state. At this time, the conduction monitoring device in the mechanical explosion-proof valve is in a closed state. The 12V power supply of the low-voltage power supply is connected to the BMS. The BMS receives this electrical signal and then directly obtains the thermal runaway information (assuming voltage and temperature). The BMS will combine the voltage and temperature signals to determine whether thermal runaway has occurred and issue a thermal runaway alarm. If the voltage and temperature are abnormal, it is determined that thermal runaway has occurred. If the voltage and temperature are not abnormal, it is determined that the air tightness of the entire package is abnormal, and the BMS sends a signal that the air tightness of the entire package has failed. Furthermore, when the real-time state of the system is the power-off state, the explosion-proof valve state recognition system will be awakened based on the valve opening wake-up signal first, and then the thermal runaway information collected by the thermal runaway acquisition module will be obtained based on the awakened explosion-proof valve state recognition system. That is, after the explosion-proof valve state recognition system, the thermal runaway information will be obtained after the relevant acquisition instruments are powered on. Figure 6 , Figure 6This is another flow chart of the explosion-proof valve status identification method of the present application. When the vehicle is powered off, that is, the vehicle is stationary, the BMS is in a dormant state. When the air pressure inside and outside the battery pack changes dramatically, the mechanical explosion-proof valve is in an open state. At this time, the conduction monitoring device in the mechanical explosion-proof valve is in a closed state, and the 12V power supply of the low-voltage power supply is connected. The BMS receives this electrical signal and is awakened. The BMS immediately reports a thermal runaway alarm signal and controls the explosion-proof valve status identification system to wake up, so as to obtain thermal runaway information to determine the opening state of the mechanical explosion-proof valve, so as to complete the opening state identification of the mechanical explosion-proof valve under different states, so as to expand the functionality of the mechanical explosion-proof valve.

[0078] In one embodiment, after the step of obtaining the circuit output signal output by the explosion-proof valve state identification circuit, the method includes:

[0079] Step d, when the circuit output signal is a circuit conduction signal, determining that the circuit output signal is a valve opening wake-up signal output when the conduction monitoring device is in a connected state;

[0080] Step e: when the circuit output signal is a circuit cutoff signal, determine that the circuit output signal is a valve closing standby signal output when the conduction monitoring device is in a disconnected state.

[0081] In this embodiment, after obtaining the circuit output signal, it will be determined which operation needs to be performed subsequently, and then when it is determined that the circuit output signal is a circuit conduction signal, it is determined that the circuit output signal is a valve opening wake-up signal output when the conduction monitoring device is in a connected state, and conversely when the circuit output signal is a circuit cut-off signal, it is determined that the circuit output signal is a valve closing standby signal output when the conduction monitoring device is in a disconnected state, wherein the circuit conduction signal refers to a user-defined circuit conduction signal, such as the voltage of the battery management chip connected to the low-voltage power supply, that is, the power supply or wake-up voltage is provided to the battery management chip, the valve opening wake-up signal refers to a user-defined signal for opening the mechanical explosion-proof valve, the circuit cut-off signal refers to a user-defined circuit disconnection signal, such as the voltage of the battery management chip not connected to the low-voltage power supply, that is, the power supply or wake-up voltage is not provided to the battery management chip, and the valve closing standby signal refers to a user-defined signal for closing the mechanical explosion-proof valve. After determining that it is a valve opening wake-up signal, the subsequent step S20 is executed. Otherwise, if it is determined to be a valve closing standby signal, the step of obtaining the circuit output signal of the explosion-proof valve status identification circuit will be continued after a period of time, and then the accuracy of subsequent identification is guaranteed through signal judgment.

[0082] Further, based on the first embodiment, the second embodiment, the third embodiment and / or the fourth embodiment of the present application, a fifth embodiment of the explosion-proof valve state identification method of the present application is proposed. In this embodiment, after the step of obtaining the circuit output signal output by the explosion-proof valve state identification circuit, the method includes:

[0083] Step f, when the circuit output signal is a valve opening wake-up signal, determining the real-time power value of the valve opening wake-up signal, and determining the real-time connection state corresponding to the real-time power value in a preset power correspondence table;

[0084] Step g: determining the opening state of the mechanical explosion-proof valve based on the real-time connection state.

[0085] In this embodiment, the battery management chip can determine the opening reason of the mechanical explosion-proof valve in the opening state when the circuit output signal is a valve opening wake-up signal, and can also determine the opening angle of the mechanical explosion-proof valve, because the conduction monitoring device includes a first conduction connection position, a second conduction connection position and a third conduction connection position, the first conduction connection position is connected to the positive electrode of the low-voltage power supply, the second conduction connection position is connected to the third end of the battery management chip, and the third conduction connection position is suspended, wherein the conduction monitoring device includes a micro switch, a key switch, and a patch switch. It is worth noting that the first conduction connection position includes a step-type movable conductive medium, or the second conduction connection position includes a step-type movable conductive medium, and the step-type movable conductive medium refers to a conductive material that is step-shaped and can move up and down except the lowest step (non-conductive between the steps), so that the movement distance of the movable part can be reflected as the contact distance between the first conduction connection position and the second conduction connection position, and the opening of the mechanical explosion-proof valve can be determined to ensure the functionality of the mechanical explosion-proof valve. That is, when the circuit output signal is a valve opening wake-up signal, the real-time electrical value of the valve opening wake-up signal, that is, one of the voltage or current values, can be determined. Because the conduction monitoring device will cause the contact surfaces between the second conduction connection position and the first conduction connection position to be different due to the moving distance of the movable part, and thus have different real-time electrical values, the real-time connection state between the second conduction connection position and the first conduction connection position can be determined in the preset electrical correspondence table according to the real-time electrical value. The preset electrical correspondence table refers to the electrical values ​​corresponding to different connection states. The electrical values ​​can include voltage or current values. After determining the real-time connection state, the opening state of the mechanical explosion-proof valve can be directly determined. The opening state refers to the opening size of the vent. It is worth noting that at this time, each mechanical explosion-proof valve can also be processed in turn, so that the opening size of the vent can be understood in real time to increase the functionality of the mechanical explosion-proof valve.

[0086] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the explosion-proof valve state identification method of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0087] The present application also provides an explosion-proof valve state identification system, which includes at least one mechanical explosion-proof valve, a thermal runaway acquisition module, a battery pack, an explosion-proof valve state identification circuit and a battery management chip. The mechanical explosion-proof valve and the thermal runaway acquisition module are arranged on the battery pack, wherein the explosion-proof valve state identification circuit is connected to the conduction monitoring device in all the mechanical explosion-proof valves, and the battery management chip is connected to the conduction monitoring device, the thermal runaway acquisition module and the explosion-proof valve state identification circuit. Please refer to Figure 7 , the battery management chip includes:

[0088] The information acquisition module A10 is used to acquire the circuit output signal output by the explosion-proof valve state identification circuit, wherein the circuit output signal includes a valve opening wake-up signal output when the conduction monitoring device is in a connected state;

[0089] The explosion-proof control module A20 is used to obtain the thermal runaway information collected by the thermal runaway collection module under the control of the valve opening wake-up signal, and determine the opening state of the mechanical explosion-proof valve according to the thermal runaway information.

[0090] The explosion-proof valve state identification system provided by the present application adopts the explosion-proof valve state identification method in the above embodiment, which can solve the technical problem that the use functionality of mechanical explosion-proof valves is not high. Compared with the prior art, the beneficial effects of the explosion-proof valve state identification system provided by the present application are the same as the beneficial effects of the explosion-proof valve state identification method provided by the above embodiment, and other technical features of the explosion-proof valve state identification system are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0091] The present application provides a vehicle, which includes: the above-mentioned explosion-proof valve status identification system (it is worth noting that the subsequent processor and memory can be set in the system basic chip in the explosion-proof valve status identification system), at least one processor; and a memory that is communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by at least one processor, and the instructions are executed by at least one processor so that the at least one processor can execute the explosion-proof valve status identification method in the above-mentioned embodiment one.

[0092] Reference below Figure 8, which shows a schematic diagram of a structure of a vehicle suitable for implementing the embodiment of the present application. The vehicle in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 8 The vehicle shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0093] like Figure 8 As shown, the vehicle may include a processing system 1001 (e.g., a central processing unit, a graphics processor, etc.), which may perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage system 1003 to a random access memory 1004. Various programs and data required for vehicle operation are also stored in the random access memory 1004. The processing system 1001, the read-only memory 1002, and the random access memory 1004 are connected to each other via a bus 1005. An input / output interface 1006 is also connected to the bus. Generally, the following systems may be connected to the input / output interface 1006: an input system 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output system 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage system 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication system 1009. The communication system 1009 can allow the vehicle to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a vehicle with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0094] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication system, or installed from a storage system 1003, or installed from a read-only memory 1002. When the computer program is executed by the processing system 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0095] The vehicle provided by the present application adopts the explosion-proof valve state identification method in the above embodiment, which can solve the technical problem that the mechanical explosion-proof valve has low functionality. Compared with the prior art, the beneficial effects of the vehicle provided by the present application are the same as the beneficial effects of the explosion-proof valve state identification method provided by the above embodiment, and the other technical features in the vehicle are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0096] It should be understood that the various parts disclosed in this application can be implemented by 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 one or more embodiments or examples in a suitable manner.

[0097] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0098] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the explosion-proof valve state identification method in the above-mentioned embodiment.

[0099] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. 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 combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0100] The computer-readable storage medium may be included in the vehicle, or may exist independently without being installed in the vehicle.

[0101] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by a vehicle, the vehicle:

[0102] Acquire a circuit output signal output by the explosion-proof valve state identification circuit, wherein the circuit output signal includes a valve opening wake-up signal output when the conduction monitoring device is in a connected state;

[0103] Under the control of the valve opening wake-up signal, the thermal runaway information collected by the thermal runaway acquisition module is obtained, and the opening state of the mechanical explosion-proof valve is determined according to the thermal runaway information.

[0104] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0105] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0106] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0107] The computer-readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned explosion-proof valve state identification method, and can solve the technical problem that the use functionality of mechanical explosion-proof valves is not high. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the explosion-proof valve state identification method provided in the above-mentioned embodiment, and will not be repeated here.

[0108] The present application also provides a computer program product, including a computer program, which implements the steps of the above-mentioned explosion-proof valve state identification method when executed by a processor.

[0109] The computer program product provided by the present application can solve the technical problem that the mechanical explosion-proof valve has low functionality. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as those of the explosion-proof valve state identification method provided by the above embodiment, which will not be described in detail here.

[0110] The above are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for identifying the state of an explosion-proof valve, characterized in that: The explosion-proof valve state identification method is applied to an explosion-proof valve state identification system, which includes at least one mechanical explosion-proof valve, a thermal runaway acquisition module, a battery pack, and an explosion-proof valve state identification circuit. The mechanical explosion-proof valve and the thermal runaway acquisition module are arranged on the battery pack, and the explosion-proof valve state identification circuit is connected to the conduction monitoring devices in all the mechanical explosion-proof valves. The explosion-proof valve state identification method includes: Acquire a circuit output signal output by the explosion-proof valve state identification circuit, wherein the circuit output signal includes a valve opening wake-up signal output when the conduction monitoring device is in a connected state; Under the control of the valve opening wake-up signal, the thermal runaway information collected by the thermal runaway collection module is obtained, and the opening state of the mechanical explosion-proof valve is determined according to the thermal runaway information.

2. The explosion-proof valve state identification method according to claim 1, characterized in that: When each of the conduction monitoring devices is in a centralized output state, the thermal runaway information includes a first voltage change value and a first temperature value of the battery pack, and the step of determining the opening state of the mechanical explosion-proof valve according to the thermal runaway information includes: When the first voltage change value is greater than a preset first voltage change threshold, or the first temperature value is greater than a preset first temperature threshold, determining that the opening state of the mechanical explosion-proof valve is a thermal runaway state; When the first voltage change value is less than or equal to a preset first voltage change threshold, and the first temperature value is less than or equal to a preset first temperature threshold, it is determined that the opening state of the mechanical explosion-proof valve is an airtight failure state.

3. The explosion-proof valve status identification method according to claim 1, characterized in that: When each of the conduction monitoring devices is in an independent output state, the step of determining the opening state of the mechanical explosion-proof valve according to the thermal runaway information further includes: Determine a target mechanical explosion-proof valve corresponding to the valve-opening wake-up signal, and determine a target setting area of ​​the target mechanical explosion-proof valve on the battery pack, wherein the target mechanical explosion-proof valve includes a mechanical explosion-proof valve corresponding to the conduction monitoring device in a connected state; The target thermal runaway information corresponding to each of the target setting areas is determined in the thermal runaway information, and the opening state of the target mechanical explosion-proof valve is determined according to the target thermal runaway information.

4. The explosion-proof valve state identification method according to claim 3, characterized in that: The target thermal runaway information includes a second voltage change value and a second temperature value of the target setting area, and the step of determining the opening state of the target mechanical explosion-proof valve according to the target thermal runaway information includes: For each of the target mechanical explosion-proof valves, determining a second voltage change threshold and a second temperature threshold in a voltage-temperature threshold table; When the second voltage change value is greater than the second voltage change threshold, or the second temperature value is greater than the second temperature threshold, determining that the opening state of the target mechanical explosion-proof valve is a thermal runaway state; When the second voltage change value is less than or equal to the second voltage change threshold, and the second temperature value is less than or equal to the second temperature threshold, it is determined that the opening state of the target mechanical explosion-proof valve is an airtight failure state.

5. The explosion-proof valve status identification method according to claim 1, characterized in that: The step of acquiring the thermal runaway information collected by the thermal runaway collection module under the control of the valve opening wake-up signal comprises: Acquire the real-time status of the explosion-proof valve status identification system, wherein the real-time status of the system includes a power-on status and a power-off status; When the real-time state of the system is the power-on state, triggering an acquisition instruction based on the valve opening wake-up signal, and acquiring the thermal runaway information acquired by the thermal runaway acquisition module based on the acquisition instruction; When the real-time state of the system is the power-off state, the explosion-proof valve state identification system is awakened based on the valve opening wake-up signal, and based on the awakened explosion-proof valve state identification system, the thermal runaway information collected by the thermal runaway collection module is acquired.

6. The explosion-proof valve status identification method according to claim 1, characterized in that: After the step of obtaining the circuit output signal output by the explosion-proof valve state identification circuit, the method further comprises: When the circuit output signal is a circuit conduction signal, determining that the circuit output signal is a valve opening wake-up signal output when the conduction monitoring device is in a connected state; When the circuit output signal is a circuit cutoff signal, it is determined that the circuit output signal is a valve closing standby signal output when the conduction monitoring device is in a disconnected state.

7. The explosion-proof valve status identification method according to any one of claims 1 to 6, characterized in that: After the step of obtaining the circuit output signal output by the explosion-proof valve state identification circuit, the method further comprises: When the circuit output signal is a valve opening wake-up signal, determining a real-time power value of the valve opening wake-up signal, and determining a real-time connection state corresponding to the real-time power value in a preset power correspondence table; The opening state of the mechanical explosion-proof valve is determined based on the real-time connection state.

8. An explosion-proof valve status identification system, characterized in that: The explosion-proof valve state identification system includes at least one mechanical explosion-proof valve, a thermal runaway acquisition module, a battery pack, an explosion-proof valve state identification circuit and a battery management chip. The mechanical explosion-proof valve and the thermal runaway acquisition module are arranged on the battery pack, wherein the explosion-proof valve state identification circuit is connected to the conduction monitoring device in all the mechanical explosion-proof valves, the battery management chip is connected to the conduction monitoring device, the thermal runaway acquisition module and the explosion-proof valve state identification circuit, and the battery management chip includes: An information acquisition module, used to acquire a circuit output signal output by the explosion-proof valve state identification circuit, wherein the circuit output signal includes a valve opening wake-up signal output when the conduction monitoring device is in a connected state; A state recognition module is used to obtain the thermal runaway information collected by the thermal runaway collection module under the control of the valve opening wake-up signal, and determine the opening state of the mechanical explosion-proof valve according to the thermal runaway information.

9. A vehicle, characterized in that: The vehicle includes an explosion-proof valve state identification system, a processor and a memory, wherein the memory stores an explosion-proof valve state identification method program that can be run on the processor, wherein when the explosion-proof valve state identification method program is executed by the processor, the steps of the explosion-proof valve state identification method as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores an explosion-proof valve state identification method program, wherein when the explosion-proof valve state identification method program is executed by a processor, the steps of the explosion-proof valve state identification method according to any one of claims 1 to 7 are implemented.

Images