Explosion-proof valve state recognition system and vehicle

Abstract

The invention discloses an anti-explosion valve state recognition system and a vehicle, and relates to the technical field of anti-explosion valves, the anti-explosion valve state recognition system comprises a battery pack, at least one mechanical anti-explosion valve arranged on the battery pack and an anti-explosion valve control circuit, the mechanical anti-explosion valve comprises a conduction monitoring device, and the anti-explosion valve control circuit comprises a low-voltage power source, a power source, a power source control circuit and a power source control circuit; the positive electrode is connected with the first end of the conduction monitoring device; the first end of the battery management chip is connected with the positive electrode of the low-voltage power supply, the second end of the battery management chip is connected with the negative electrode of the low-voltage power supply, the third end of the battery management chip is connected with the second end of the conduction monitoring device, and when the mechanical anti-explosion valve is closed, the conduction monitoring device is in a disconnected state, and the battery management chip is disconnected with the low-voltage power supply to determine that the mechanical anti-explosion valve is in a closed state; and when the mechanical anti-explosion valve is opened, the conduction monitoring device is in a connection state, and the battery management chip is connected with the low-voltage power supply to determine that the mechanical anti-explosion valve is in an opening state. 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 particularly to an explosion-proof valve state recognition system and a vehicle. Background Art

[0002] With the popularization of the use of mechanical explosion-proof valves in different fields, users have also put forward higher requirements for the state recognition method of mechanical explosion-proof valves.

[0003] During the use of traditional mechanical explosion-proof valves, the opening and closing states are not recognized, resulting in the phenomenon that the actual use state of the mechanical explosion-proof valve cannot be determined. That is, due to the inability to determine the actual use state (open state and closed state) of the mechanical explosion-proof valve, the use functionality of the mechanical explosion-proof valve is not high.

[0004] The above content is only used to assist in understanding the technical solution of the present application, and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main purpose of the present application is to provide an explosion-proof valve state recognition system and a vehicle, aiming to solve the technical problem of low use functionality of mechanical explosion-proof valves.

[0006] To achieve the above purpose, the present application provides an explosion-proof valve state recognition system. The explosion-proof valve state recognition system includes at least one mechanical explosion-proof valve, a battery pack, and an explosion-proof valve control circuit. The mechanical explosion-proof valve is arranged on the battery pack. Among them, all the mechanical explosion-proof valves include conduction monitoring devices. The explosion-proof valve control circuit includes:

[0007] A low-voltage power supply, the positive electrode of the low-voltage power supply is connected to the first ends of all the conduction monitoring devices;

[0008] A battery management chip, the first end of the battery management chip is connected to the positive electrode of the low-voltage power supply, the second end of the battery management chip is connected to the negative electrode of the low-voltage power supply, and the third end of the battery management chip is connected to the second ends of all the conduction monitoring devices. Among them, when the mechanical explosion-proof valve is closed, the conduction monitoring device is in an open state, and the battery management chip is disconnected from the low-voltage power supply to determine that the mechanical explosion-proof valve is in the closed state; when the mechanical explosion-proof valve is open, the conduction monitoring device is in a connected state, and the battery management chip is connected to the low-voltage power supply to determine that the mechanical explosion-proof valve is in the open state.

[0009] In one embodiment, the third end of the battery management chip includes a first wake-up port, and the second ends of all the conduction monitoring devices are connected to the first wake-up port.

[0010] In one embodiment, the third terminal of the battery management chip includes a plurality of second wake-up ports, and the second terminals of different conduction monitoring devices are connected to different second wake-up ports.

[0011] In one embodiment, the mechanical explosion-proof valve comprises:

[0012] A valve body, wherein an exhaust passage is arranged on the valve body, and the valve body is provided with an air release port and an escape port connected to the exhaust passage;

[0013] A movable member, the movable member can be movably arranged in the exhaust passage, and is used to open or close the air leakage port, so as to have a pressure relief state and a closed state, the air leakage port and the avoidance port are respectively arranged on opposite sides of the valve body, and the movable member is arranged opposite to the avoidance port along the moving direction;

[0014] Wherein, the conduction monitoring device is connected to the movable part. In the closed state, the movable part closes the air vent to control the conduction monitoring device to be in a disconnected state. In the pressure relief state, the movable part opens the air vent to control the conduction monitoring device to be in a connected state.

[0015] In one embodiment, the conduction monitoring device is fixed on the valve body and can be connected to the movable part through the avoidance opening, wherein the avoidance opening is used to avoid at least one of the conduction monitoring device and the movable part.

[0016] In one embodiment, the movable part includes a cover body and a guide rod connected to each other. The cover body can be movably disposed on the air leak port to be in the exhaust channel and completely cover the air leak port. The avoidance port and the end of the guide rod away from the cover body 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.

[0017] In one embodiment, 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 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, wherein the conduction monitoring device includes one of a micro-switch, a push button switch or a patch switch.

[0018] In one embodiment, the first conductive connection location includes a stepped movable conductive medium, or the second conductive connection location includes a stepped movable conductive medium.

[0019] In one embodiment, the battery pack is provided with:

[0020] An explosion-proof valve installation port, wherein the explosion-proof valve installation port is used to install the mechanical explosion-proof valve;

[0021] A positive power supply terminal, the outer end of the package of the positive power supply terminal is connected to the positive electrode of the low-voltage power supply, and the inner end of the package of the positive power supply terminal is connected to the first ends of all the conduction monitoring devices and the first end of the battery management chip;

[0022] A negative power supply terminal, the outer end of the package of the negative power supply terminal is connected to the negative electrode of the low-voltage power supply, and the inner end of the package of the negative power supply terminal is connected to the second end of the battery management chip.

[0023] In addition, to achieve the above object, the present application also provides a vehicle, and the vehicle includes the above explosion-proof valve state recognition system.

[0024] The embodiment of the present application provides an explosion-proof valve state recognition system, including at least one mechanical explosion-proof valve, a battery pack, and an explosion-proof valve control circuit. The mechanical explosion-proof valve is arranged on the battery pack. Among them, all the mechanical explosion-proof valves include conduction monitoring devices. The explosion-proof valve control circuit includes: a low-voltage power supply, the positive electrode of the low-voltage power supply is connected to the first ends of all the conduction monitoring devices; a battery management chip, the first end of the battery management chip is connected to the positive electrode of the low-voltage power supply, the second end of the battery management chip is connected to the negative electrode of the low-voltage power supply, and the third end of the battery management chip is connected to the second ends of all the conduction monitoring devices. Among them, when the mechanical explosion-proof valve is closed, the conduction monitoring device is in an open state, and the battery management chip is disconnected from the low-voltage power supply to determine that the mechanical explosion-proof valve is in a closed state; when the mechanical explosion-proof valve is opened, the conduction monitoring device is in a connected state, and the battery management chip is connected to the low-voltage power supply to determine that the mechanical explosion-proof valve is in an open state. The battery management chip is indirectly connected to the low-voltage power supply through the conduction monitoring device. Furthermore, the actual use state of the mechanical explosion-proof valve can be reflected based on the open state and the connected state of the conduction monitoring device, specifically manifested as the connection relationship between the battery management chip and the low-voltage power supply (that is, manifested as whether the battery management chip is powered on and awakened), to determine the actual use state of the mechanical explosion-proof valve, thereby avoiding the phenomenon of being unable to determine the actual use state of the mechanical explosion-proof valve. This explosion-proof valve state recognition system indirectly connects the battery management chip to the low-voltage power supply through the conduction monitoring device to determine the actual use state of the mechanical explosion-proof valve based on the connection relationship between the battery management chip and the low-voltage power supply, thereby improving the use functionality of the mechanical explosion-proof valve. Description of the Drawings

[0025] Figure 1 It is a frame schematic diagram of the first embodiment of the explosion-proof valve state recognition system of the present application;

[0026] Figure 2 It is a connection schematic diagram of the explosion-proof valve control circuit in the explosion-proof valve state recognition system of the present application;

[0027] Figure 3 It is another connection schematic diagram of the explosion-proof valve control circuit in the explosion-proof valve state recognition system of the present application;

[0028] Figure 4 It is an equivalent connection schematic diagram of the explosion-proof valve state recognition system of the present application;

[0029] Figure 5 It is another equivalent connection schematic diagram of the explosion-proof valve state recognition system of the present application;

[0030] Figure 6 It is a physical schematic diagram of the mechanical explosion-proof valve of the present application;

[0031] Figure 7 It is a physical schematic diagram of the conduction monitoring device on the mechanical explosion-proof valve of the present application;

[0032] Figure 8 It is a connection schematic diagram of the conduction monitoring device on the mechanical explosion-proof valve of the present application;

[0033] Figure 9 It is a schematic diagram of the device structure of the hardware operating environment involved in the device of the present application.

[0034] The realization, functional features and advantages of the purpose of the present application will be further described with reference to the accompanying drawings in combination with embodiments.

[0035] Explanation of the reference numerals in the drawings:

[0036] 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; 21. First wake-up port; 22. Second wake-up port; 201. Positive power terminal; 202. Negative power terminal; 1. Housing; 2. Spring; 3. Guide rod; 4. Body; 5. Cover; 6. Piston; 7. Sealing ring; 8. Micro control switch; 81. Micro control switch pushing part; 82. Micro control switch body; 321. First conduction connection position; 322. Second conduction connection position; 323. Third conduction connection position; 330. Step-type movable conductive medium; 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 implementation manners

[0037] 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.

[0038] In order to better understand the technical solution of the present application, the following will be described in detail in combination with the drawings of the specification and specific implementation manners.

[0039] The operating principle of the existing mechanical explosion-proof valve is as follows: The seal 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 are realized through the telescopic property of the spring. Its movement principle is that when thermal runaway occurs in the battery pack (assuming that the battery pack is vented and explosion-proof, and of course, it can also be used for other products to vent and explosion-proof), resulting in an increase in the pressure inside the pack. When the pressure increases to a certain extent, the pressure inside 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 inside the pack. When the pressure inside the pack decreases to a certain extent, the spring rebounds and pushes the guide rod to move inward, and the explosion-proof valve closes. From the above working and operating principles, it can be seen that during the entire working process of the mechanical explosion-proof valve, there is no problem of detecting the actual usage state (open state and closed state) of the explosion-proof valve (while generally knowing the actual usage state requires using all kinds of sensors to detect the open state (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 there is no detection process for the opening air pressure of the mechanical explosion-proof valve itself), which will result in a relatively high overall detection cost), thus causing the use functionality of the mechanical explosion-proof valve to be not high.

[0040] This explosion-proof valve is mechanical and has no monitoring function. In addition to thermal runaway, when the vehicle wades through water or enters a tunnel, etc., it is also easy to cause a sharp change in the air pressure inside and outside the pack, resulting in the opening of the valve. If the valve is stuck by sediment after opening in the wading state, it is easy to cause the airtightness of the entire pack to fail, bringing potential safety hazards.

[0041] In addition, if the entire vehicle enters the sleep state, the explosion-proof valve has no function of waking up the BMS (Battery Management System) in reverse for alarm, and it is necessary to add a gas pressure sensor to realize the relevant sleep wake-up function, increasing the cost.

[0042] Therefore, based on the above deficiencies of the mechanical explosion-proof valve, the explosion-proof valve state recognition system of the present application is proposed. The main solution of the embodiment of the present application is: The conduction monitoring device enables the battery management chip to be indirectly connected to the low-voltage power supply, and then the actual usage state of the mechanical explosion-proof valve can be reflected based on the disconnection state and connection state of the conduction monitoring device. Specifically, it is manifested as the connection relationship between the battery management chip and the low-voltage power supply (that is, whether the battery management chip is powered on and woken up) to determine the actual usage state of the mechanical explosion-proof valve, so as to avoid the occurrence of the phenomenon that the actual usage state of the mechanical explosion-proof valve cannot be determined. This explosion-proof valve state recognition system enables the battery management chip to be indirectly connected to the low-voltage power supply through the conduction monitoring device, and determines the actual usage state of the mechanical explosion-proof valve based on the connection relationship between the battery management chip and the low-voltage power supply, thereby improving the use functionality of the mechanical explosion-proof valve.

[0043] Based on this, an explosion-proof valve state recognition system is provided in an embodiment of the present application. Referring to Figure 1 , Figure 1 It is a schematic framework diagram of the first embodiment of the explosion-proof valve state recognition system of the present application.

[0044] Referring to Figure 1 , the present application provides an explosion-proof valve state recognition system. The explosion-proof valve state recognition 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. Among them, all the mechanical explosion-proof valves 300 include a conduction monitoring device 320. The explosion-proof valve control circuit 100 includes:

[0045] A low-voltage power supply 10, the positive electrode of the low-voltage power supply 10 is connected to the first ends of all the conduction monitoring devices 320;

[0046] A battery management chip 20, the first end of the battery management chip 20 is connected to the positive electrode of the low-voltage power supply 10, the second end of the battery management chip 20 is connected to the negative electrode of the low-voltage power supply 10, and the third end of the battery management chip 20 is connected to the second ends of all the conduction monitoring devices 320. Among them, when the mechanical explosion-proof valve 300 is closed, the conduction monitoring device 320 is in an open state, and the battery management chip 20 is disconnected from the low-voltage power supply 10 to determine that the mechanical explosion-proof valve 300 is in a closed state; when the mechanical explosion-proof valve 300 is opened, the conduction monitoring device 320 is in a connected state, and the battery management chip 20 is connected to the low-voltage power supply 10 to determine that the mechanical explosion-proof valve 300 is in an open state.

[0047] In this embodiment, the entire explosion-proof valve state recognition 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 disposed on the battery pack 200 (which means that the exhaust input port of the mechanical explosion-proof valve 300 faces inside the battery pack 200, and the exhaust output port of the mechanical explosion-proof valve 300 faces outside 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 show the open or closed state of the mechanical explosion-proof valve 300 through the conduction monitoring device 320 (which is actually a product with two states that realizes different connection or output states based on the opening or closing of the mechanical explosion-proof valve 300, such as the common switch pressing and non-pressing to achieve two different states, that is, the switch can be selected as the conduction monitoring device 320). To determine that the mechanical explosion-proof valve 300 is in the open state through the combination of the conduction monitoring device 320 and the explosion-proof valve control circuit 100, that is, the low-voltage power supply 10 is indirectly connected to the battery management chip 20 (i.e., BMS (Battery Management System)) through the conduction monitoring device 320. Then, when the mechanical explosion-proof valve 300 is closed, due to the operating principle of the mechanical explosion-proof valve 300 itself, the conduction monitoring device 320 is in the disconnected state. At this time, the battery management chip 20 is disconnected from the low-voltage power supply 10, and thus it can be determined that the mechanical explosion-proof valve 300 is in the closed state. Among them, the disconnected state means that due to the operating principle of the mechanical explosion-proof valve 300 itself, the first end of the conduction monitoring device 320 and the first end of the conduction monitoring device 320 are not connected together, resulting in a situation where the low-voltage power supply 10 to the battery management chip 20 is open-circuited. Then, based on the fact that the battery management chip 20 does not receive the low-voltage power supply 10, it can be determined that the mechanical explosion-proof valve 300 is in the closed state. On the contrary, when the mechanical explosion-proof valve 300 is open, due to the operating principle of the mechanical explosion-proof valve 300 itself, the conduction monitoring device 320 is in the connected state. At this time, the battery management chip 20 is connected to the low-voltage power supply 10, and thus it can be determined that the mechanical explosion-proof valve 300 is in the open state. Among them, the connected state means that due to the operating principle of the mechanical explosion-proof valve 300 itself, the first end of the conduction monitoring device 320 and the first end of the conduction monitoring device 320 are connected together, resulting in a situation where the low-voltage power supply 10 to the battery management chip 20 forms a loop. Then, based on the fact that the battery management chip 20 receives the low-voltage power supply 10, it can be determined that the mechanical explosion-proof valve 300 is in the open state. It should be noted that at this time, the actual usage state of the mechanical explosion-proof valve 300 can be directly detected by detecting whether the first end of the battery management chip 20 receives voltage, which can realize the detection of the actual usage state of the mechanical explosion-proof valve 300 at low cost, thereby improving the usage functionality of the mechanical explosion-proof valve.

[0048] In this embodiment, the explosion-proof valve state recognition system includes at least one mechanical explosion-proof valve, a battery pack, and an explosion-proof valve control circuit. The mechanical explosion-proof valve is disposed on the battery pack. All of the mechanical explosion-proof valves include conduction monitoring devices. The explosion-proof valve control circuit includes: a low-voltage power supply, the positive electrode of the low-voltage power supply is connected to the first ends of all the conduction monitoring devices; a battery management chip, the first end of the battery management chip is connected to the positive electrode of the low-voltage power supply, the second end of the battery management chip is connected to the negative electrode of the low-voltage power supply, and the third end of the battery management chip is connected to the second ends of all the conduction monitoring devices. When the mechanical explosion-proof valve is closed, the conduction monitoring device is in an open state, and the battery management chip is disconnected from the low-voltage power supply to determine that the mechanical explosion-proof valve is in the closed state; when the mechanical explosion-proof valve is opened, the conduction monitoring device is in a connected state, and the battery management chip is connected to the low-voltage power supply to determine that the mechanical explosion-proof valve is in the open state. The battery management chip is indirectly connected to the low-voltage power supply through the conduction monitoring device, and thus the actual usage state of the mechanical explosion-proof valve can be reflected based on the open state and the connected state of the conduction monitoring device, specifically manifested as the connection relationship between the battery management chip and the low-voltage power supply (i.e., manifested as whether the battery management chip is powered on and awakened) to determine the actual usage state of the mechanical explosion-proof valve, thereby avoiding the occurrence of the phenomenon that the actual usage state of the mechanical explosion-proof valve cannot be determined. This explosion-proof valve state recognition system enables the battery management chip to be indirectly connected to the low-voltage power supply through the conduction monitoring device to determine the actual usage state of the mechanical explosion-proof valve based on the connection relationship between the battery management chip and the low-voltage power supply, thereby improving the usage functionality of the mechanical explosion-proof valve.

[0049] Further, based on the first embodiment of the present application above, a second embodiment of the explosion-proof valve state recognition system of the present application is proposed. Refer to Figure 2 , Figure 2 FIG. is a connection schematic diagram of the explosion-proof valve control circuit in the explosion-proof valve state recognition system of the present application. The third end of the battery management chip 20 includes a first wake-up port 21, and the second ends of all the conduction monitoring devices 320 are connected to the first wake-up port 21.

[0050] In one embodiment, refer to Figure 3 , Figure 3 FIG. is another connection schematic diagram of the explosion-proof valve control circuit in the explosion-proof valve state recognition system of the present application. The third end of the battery management chip 20 includes a plurality of second wake-up ports 22, and the second ends of different conduction monitoring devices 300 are respectively connected to different second wake-up ports 22.

[0051] In this embodiment, due to the design requirements of the battery pack, it may be necessary to arrange multiple mechanical explosion-proof valves 300 with conduction monitoring devices 320 in the battery pack. Among them, the multiple mechanical explosion-proof valves 300 with conduction monitoring devices 320 are connected in parallel (i.e., using a low-voltage power supply 10 and a battery management chip 20) to ensure that when one of them is opened, a voltage wake-up signal (i.e., the low-voltage power supply 10 serves as the wake-up signal) can be sent to the BMS. There are two parallel connection methods: One connection method is that multiple branches are connected in parallel and then connected to the BMS as one path (i.e., only using one first wake-up port to connect the second ends of multiple conduction monitoring devices 320). At this time, when one of them acts, it can be recognized whether the whole pack has a thermal runaway or a gas tightness failure. However, this scheme cannot identify which explosion-proof valve has an opening action, but it can reduce the complexity of port usage and wiring on the BMS. The other connection method is that multiple branches are separately connected to the BMS, and different branches are connected through different PIN feet (i.e., only using multiple second wake-up ports, and one second wake-up port is used to connect the second end of one conduction monitoring device 320). When a certain explosion-proof valve is opened, in addition to being able to recognize whether the whole pack has a thermal runaway or a gas tightness failure, it can also determine which explosion-proof valve has an opening action, with higher accuracy, so as to ensure the accuracy of determining the actual usage state of the mechanical explosion-proof valve 300.

[0052] In one embodiment, referring to Figure 4 , Figure 4 is an equivalent connection schematic diagram of the explosion-proof valve state recognition system of this application. At this time, a mechanical explosion-proof valve 300 realizes the detection of the actual usage state through an explosion-proof valve control circuit 100. Among them, the wake-up route means that when the mechanical explosion-proof valve 300 is opened, the low-voltage power supply 10 forms a loop through the mechanical explosion-proof valve 300 to supply power and wake up the battery management chip 20. After being woken up, it can be known that the mechanical explosion-proof valve 300 is opened. Further, reference can be made to Figure 5 , Figure 5 is another equivalent connection schematic diagram of the explosion-proof valve state recognition system of this application. At this time, two mechanical explosion-proof valves 300 realize the detection of the actual usage state through an explosion-proof valve control circuit 100. Among them, the first wake-up route means that when the first mechanical explosion-proof valve 300 is opened, the low-voltage power supply 10 forms a loop through the mechanical explosion-proof valve 300 to supply power and wake up the battery management chip 20. After being woken up, it can be known that the first mechanical explosion-proof valve 300 is opened. The second wake-up route is the wake-up signal of the second mechanical explosion-proof valve 300. The two signal lines can be separately connected to the battery management chip 20, and then it can be accurately determined which specific mechanical explosion-proof valve 300 is opened to ensure the accuracy of the actual usage state detection.

[0053] In one embodiment, based on the first embodiment and / or the second embodiment of the present application above, a third embodiment of the explosion-proof valve state recognition system of the present application is proposed. Refer to Figure 6 , Figure 6 which is a schematic diagram of a physical object of the mechanical explosion-proof valve of the present application. The mechanical explosion-proof valve 300 includes:

[0054] A valve body, on which an exhaust passage is provided, and the valve body is provided with a vent port and an avoidance port communicating with the exhaust passage;

[0055] A moving part, which is movably arranged in the exhaust passage to open or close the vent port, so as to have a pressure relief state and a closed state. The vent port and the avoidance port are respectively arranged on opposite sides of the valve body, and the moving part is arranged opposite to the avoidance port along the moving direction;

[0056] Among them, the conduction monitoring device 320 is connected to the moving part. In the closed state, the moving part closes the vent port to control the conduction monitoring device to be in a disconnected state. In the pressure relief state, the moving part opens the vent port to control the conduction monitoring device to be in a connected state.

[0057] In this embodiment, the hardware composition of the mechanical explosion-proof valve 300 consists of a valve body and a moving part. An exhaust passage is provided on the valve body, and the valve body is provided with a vent port and an avoidance port communicating with the exhaust passage. The vent port refers to the port for exhausting outside the battery pack 200, and the avoidance port refers to the port for absorbing the gas inside the battery pack 200 inside the battery pack 200. The moving part is movably arranged in the exhaust passage (i.e., moves in the exhaust passage to open the vent port), and is used to open the vent port under the pressure of the battery pack 200, thereby releasing the gas inside the battery pack 200. It should be noted that the vent port and the avoidance port (or other normally open openings for exhausting the battery pack) can be respectively arranged on opposite sides of the valve body, and the moving part is arranged opposite to the avoidance port along the moving direction. Thus, the conduction monitoring device can be controlled to be in a connected state when the moving part moves, and conversely, the conduction monitoring device can be controlled to be in a disconnected state when the moving part does not move, so as to determine the actual use state of the mechanical explosion-proof valve 300 based on the state of the conduction monitoring device 320. Because the actual use state of the mechanical explosion-proof valve 300 is formed according to whether the moving part moves, the state of different conduction monitoring devices 320 can be determined based on whether the moving part moves, so as to inform the battery management chip 20 of the actual use state of the mechanical explosion-proof valve 300 based on the state of the conduction monitoring device 320. Thus, the detection of the actual use state of the mechanical explosion-proof valve 300 can be realized at low cost.

[0058] In one embodiment, the conduction monitoring device 320 is fixed on the valve body and can be connected to the moving part through the avoidance port, wherein the avoidance port is used to avoid at least one of the conduction monitoring device 320 and the moving part.

[0059] In one embodiment, the movable member includes a cover body 5 and a guide rod 3 connected to each other. The cover body 5 is movably disposed at the air release port to completely block the air release port in the exhaust passage. 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 320 is fixed on the valve body and connected to the inner side of the cover body 5.

[0060] In this embodiment, the conduction monitoring device 320 is fixed on the valve body and can be connected to the movable member through the avoidance port. Among them, the avoidance port is used to avoid at least one of the conduction monitoring device 320 and the movable member, that is, the valve body includes a housing 1 and a body 4, and an internal exhaust passage. At this time, the conduction monitoring device 320 is fixed on the housing 1 and connected to the movable member. Furthermore, when the movable member moves, the state of the conduction monitoring device 320 is driven to change, so that the conduction monitoring device 320 is in different states, and thus the voltages output to the battery management chip 20 in different states are different. When the low-voltage power supply 10 is connected to the battery management chip 20, it is determined that the mechanical explosion-proof valve 300 is opened, and vice versa, it is determined that the mechanical explosion-proof valve 300 is closed. Among them, the avoidance port is used to avoid at least one of the conduction monitoring device 320 and the movable member, that is, it is similar to setting at least one of the conduction monitoring device 320 and the movable member. In another way, the movable member includes a cover body 5 and a guide rod 3 connected to each other. The cover body 5 is movably disposed at the air release port (sealing can be performed 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 320 is fixed on the valve body and connected to the inner side of the cover body 5, that is, at this time, it is connected to the side of the movable member close to the air release port. It should be noted that because the conduction monitoring device 320 itself is to detect the movement of the movable member, it can be connected to any part of the movable member, which is not limited here.

[0061] Further, based on the first embodiment, the second embodiment, and / or the third embodiment of the present application above, a fourth embodiment of the explosion-proof valve state recognition system of the present application is proposed. Refer to Figure 8 , Figure 8 is a connection schematic diagram of the conduction monitoring device on the mechanical explosion-proof valve of the present application. The conduction monitoring device 320 includes a first conduction connection position 321, a second conduction connection position 322, and a third conduction connection position 323. The first conduction connection position 321 is connected to the positive pole of the low-voltage power supply 10. The second conduction connection position 322 is connected to the third terminal of the battery management chip 20. The third conduction connection position 323 is suspended. Among them, the conduction monitoring device 320 includes one of a micro control switch, a key switch, or a patch switch.

[0062] In one embodiment, the first conduction connection position 321 includes a stepped movable conductive medium 330, or the second conduction connection position 322 includes a stepped movable conductive medium 330.

[0063] In this embodiment, the internal design of the conduction monitoring device 320 can include three conduction connection positions, namely the first - third conduction connection positions. At this time, the first conduction connection position is connected to the positive pole of the low - voltage power supply 10, the second conduction connection position is connected to the third terminal of the battery management chip 20, and the third conduction connection position is suspended. Thus, when the mechanical explosion - proof valve is opened, the first conduction connection position is connected to the second conduction connection position and disconnected from the third conduction connection position. Then, the low - voltage power supply 10 supplies power to wake up the battery management chip 20. When the mechanical explosion - proof valve is closed, the first conduction connection position is connected to the third conduction connection position and disconnected from the second conduction connection position. Then, the low - voltage power supply 10 cannot supply power to the battery management chip 20, and the battery management chip 20 is in a standby state. That is, the entire internal part of the conduction monitoring device 320 is similar to the function of a selector. It should be noted that the first conduction connection position includes a stepped movable conductive medium, or the second conduction connection position includes a stepped movable conductive medium. The stepped movable conductive medium refers to a conductive material in a stepped shape, and except for the lowest step, it can move up and down. Thus, 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 then the opening degree 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 7 , Figure 7 which is a physical schematic diagram of the conduction monitoring device on the mechanical explosion - proof valve of this application. The conduction monitoring device 320 can be a micro - control switch. The main body 82 of the micro - control switch can be fixed on the housing 1. The micro - control switch pushing part 81 is connected to the movable part through an avoidance port to control the movement of the micro - control switch pushing part 81 when the movable part moves, so that the conduction monitoring device 320 is in different states, and then the actual use state of the mechanical explosion - proof valve can be determined.

[0064] In one embodiment, on the battery pack 200, there are provided:

[0065] An explosion - proof valve mounting port for mounting the mechanical explosion - proof valve 300;

[0066] A positive - pole power - supply terminal 201. The outer part of the package of the positive - pole power - supply terminal 201 (the part arranged outside the battery pack) is connected to the positive pole of the low - voltage power supply 10, and the inner part of the package of the positive - pole power - supply terminal 201 (the part arranged inside the battery pack) is connected to the first ends of all the conduction monitoring devices 320 and the first end of the battery management chip 20;

[0067] A negative - pole power - supply terminal 202. The outer part of the package of the negative - pole power - supply terminal 202 is connected to the negative pole of the low - voltage power supply 10, and the inner part of the package of the negative - pole power - supply terminal 202 is connected to the second end of the battery management chip 20.

[0068] In this embodiment, an explosion-proof valve mounting port can be provided on the battery pack 200, and then a mechanical explosion-proof valve 300, a positive power terminal, and a negative power terminal can be installed (assuming that the battery management chip 20 is inside the battery pack 200. If the battery management chip 20 is outside the battery pack 200, there is no need to use the positive and negative power terminals on the battery pack 200 for connection). At this time, the positive power supply of the low-voltage power supply 10 is connected to the positive power supply of the BMS and one side interface of the conduction monitoring device 320 respectively, and the other side interface of the conduction monitoring device 320 is connected to the wake-up interface of the BMS. When the explosion-proof valve is opened, the micro-control switch closes to send a voltage signal to the BMS wake-up interface to wake up the BMS, so that the functionality of the mechanical explosion-proof valve 300 can be extended based on the fixed settings of the original battery pack 200, and thus the functionality of the mechanical explosion-proof valve can be extended.

[0069] Based on the above embodiments of the explosion-proof valve state recognition system, a vehicle is proposed, and the vehicle includes the above explosion-proof valve state recognition system.

[0070] In this embodiment, the above vehicle indirectly connects the battery management chip to the low-voltage power supply by designing a conduction monitoring device in the explosion-proof valve state recognition system. Furthermore, the actual usage state of the mechanical explosion-proof valve can be reflected based on the disconnection state and connection state of the conduction monitoring device, specifically manifested as the connection relationship between the battery management chip and the low-voltage power supply (that is, whether the battery management chip is powered on and woken up), so as to determine the actual usage state of the mechanical explosion-proof valve, thereby avoiding the occurrence of the phenomenon that the actual usage state of the mechanical explosion-proof valve cannot be determined. This explosion-proof valve state recognition system indirectly connects the battery management chip to the low-voltage power supply through the conduction monitoring device, and determines the actual usage state of the mechanical explosion-proof valve based on the connection relationship between the battery management chip and the low-voltage power supply, thereby improving the usage functionality of the mechanical explosion-proof valve.

[0071] In one embodiment, an explosion-proof valve state recognition method is further provided (that is, the explosion-proof valve state recognition system and the vehicle can also be the explosion-proof valve state recognition system, the vehicle, and the explosion-proof valve state recognition method). This explosion-proof valve state recognition method is applied to the explosion-proof valve state recognition system. The explosion-proof valve state recognition system includes at least one mechanical explosion-proof valve, a thermal runaway acquisition module, a battery pack, and an explosion-proof valve state recognition circuit. The mechanical explosion-proof valve and the thermal runaway acquisition module are arranged on the battery pack. Among them, the explosion-proof valve state recognition circuit is connected to the conduction monitoring device in all the mechanical explosion-proof valves. The explosion-proof valve state recognition method includes:

[0072] Obtain the circuit output signal output by the explosion-proof valve state recognition circuit, where the circuit output signal includes an open-valve wake-up signal output when the conduction monitoring device is in a connected state;

[0073] Under the control of the valve-opening wake-up signal, obtain the thermal runaway information collected by the thermal runaway acquisition module, and determine the opening state of the mechanical explosion-proof valve according to the thermal runaway information.

[0074] In this embodiment, when it is necessary to perform an actual opening state judgment, the circuit output signal output by the explosion-proof valve state recognition circuit will be obtained, that is, the level output to the battery management chip, generally an output or non-output level, that is, the circuit output signal includes the valve-opening wake-up signal output when the conduction monitoring device is in a connected state, and the 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 steps of determining the actual opening state, but continues to the next step of obtaining the circuit output signal). To obtain the thermal runaway information collected by the thermal runaway acquisition module 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, directly obtain the thermal runaway information under the control of the valve-opening wake-up signal (at this time, the entire system is in a powered-on state), and on the other hand, obtain the thermal runaway information after powering on the entire system under the control of the valve-opening wake-up signal (at this time, the entire system is in a powered-off state). Then, it will be determined whether it is a thermal runaway through the information such as voltage, temperature, and / or current in the thermal runaway information (that is, all kinds of information in the battery pack collected). If at least one of the voltage, temperature, and / or current meets the thermal runaway condition (set the thresholds of voltage, temperature, and current under thermal runaway), it will be determined that the mechanical explosion-proof valve is in a thermal runaway state at this time. Conversely, if the voltage, temperature, and / or current do not meet the thermal runaway condition, it will be determined that the mechanical explosion-proof valve is in an airtightness failure state at this time. Furthermore, the opening state of the mechanical explosion-proof valve can be determined to improve the functionality of the mechanical explosion-proof valve.

[0075] It should be noted that the above examples are only for understanding this application and do not constitute a limitation to the vehicle of this application. Based on this technical concept, more forms of simple transformation are within the protection scope of this application.

[0076] This application provides a vehicle, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the vehicle control method in the first embodiment above.

[0077] Next, refer to Figure 9, which shows a schematic structural diagram of an automobile suitable for implementing the embodiments of the present application. The automobiles in the embodiments of the present application may include, but are 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), in-vehicle terminals (such as in-vehicle navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 9 The automobile shown is merely an example and should not impose any limitations on the functions and scope of use of the embodiments of the present application.

[0078] As Figure 9 shown, the automobile may include a processing device 1001 (such as a central processing unit, a graphics processing unit, etc.), which may perform all kinds of appropriate actions and processes according to the program stored in the read-only memory (ROM: Read Only Memory) 1002 or the program loaded from the storage device 1003 into the random access memory (RAM: Random Access Memory) 1004. In the RAM 1004, all kinds of programs and data required for the operation of the automobile are also stored. The processing device 1001, the read-only memory 1002, and the random access memory 1004 are connected to each other through a bus 1005. The input / output (I / O) interface 1006 is also connected to the bus. Generally, the following devices may be connected to the input / output interface 1006: an input device 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 device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 may allow the automobile to communicate with other devices wirelessly or wiredly to exchange data. Although the figure shows an automobile with all kinds of devices, it should be understood that it is not required to implement or have all the devices shown. Instead, more or fewer devices may be implemented or had.

[0079] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product that includes a computer program carried on a computer-readable medium, and the computer program contains program codes for executing the methods shown in the flowcharts. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a read-only memory 1002. When the computer program is executed by a processing device 1001, the above functions defined in the methods of the embodiments disclosed in the present application are executed.

[0080] The vehicle provided by the present application adopts the vehicle control method in the above embodiments, and can solve the technical problem of the low functional use of the mechanical explosion-proof valve. Compared with the prior art, the beneficial effects of the vehicle provided by the present application are the same as those of the vehicle control method provided in the above embodiments, and other technical features in this vehicle are the same as those disclosed in the method of the previous embodiment, and will not be elaborated here.

[0081] It should be understood that all or part of the present 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 a suitable manner in any one or more embodiments or examples.

[0082] The above are only the specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all of them should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0083] The present application provides a computer-readable storage medium with computer-readable program instructions (i.e., computer programs) stored thereon, and the computer-readable program instructions are used to execute the vehicle control method in the above embodiments.

[0084] The computer-readable storage medium provided by this application can be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor devices, apparatuses, or components, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections with 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 fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this embodiment, the computer-readable storage medium can be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution device, apparatus, or component. The program code contained on the computer-readable storage medium can 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.

[0085] The above computer-readable storage medium can be included in an automobile; it can also exist separately without being assembled into an automobile.

[0086] The above computer-readable storage medium carries one or more programs. When the above one or more programs are executed by an automobile, the automobile is caused to:

[0087] Obtain the circuit output signal output by the explosion-proof valve state recognition circuit, where the circuit output signal includes an open-valve wake-up signal output when the conduction monitoring device is in a connected state;

[0088] Under the control of the open-valve wake-up signal, obtain the thermal runaway information collected by the thermal runaway acquisition module, and determine the opening state of the mechanical explosion-proof valve according to the thermal runaway information.

[0089] Computer program code for performing the operations of this application can be written in one or more programming languages or combinations thereof. The above-mentioned programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include 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, executed as an independent 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 can be connected to the user's computer through any kind of network, including a local area network (LAN: Local Area Network) or a wide area network (WAN: Wide Area Network), or it can be connected to an external computer (for example, by using an Internet service provider to connect through the Internet).

[0090] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of the devices, methods, and computer program products according to all the embodiments of this application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and this module, program segment, or part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the boxes may occur in a different order than those marked in the accompanying drawings. For example, two consecutively represented boxes can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, as well as the combination of boxes in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based device for performing the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0091] The modules described in the embodiments of this application can be implemented in software or in hardware. Among them, the name of the module does not constitute a limitation to the unit itself in some cases.

[0092] The readable storage medium provided by this application is a computer-readable storage medium, and the computer-readable storage medium stores computer-readable program instructions (i.e., computer programs) for performing the above-mentioned vehicle control method, which can solve the technical problem of the low functional use of the mechanical explosion-proof valve. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by this application are the same as those of the vehicle control method provided by the above embodiments, and will not be elaborated here.

[0093] The present application also provides a computer program product, including a computer program which, when executed by a processor, implements the steps of the vehicle control method as described above.

[0094] The computer program product provided by the present application can solve the technical problem of the low functional use of the mechanical explosion-proof valve. 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 vehicle control method provided by the above embodiments, and will not be elaborated here.

[0095] The above are only partial embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structural transformation made under the technical concept of the present application by using the content of the specification and drawings of the present application, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. 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 battery pack and an explosion-proof valve control circuit, all of the mechanical explosion-proof valves are arranged on the battery pack, wherein all of the mechanical explosion-proof valves include a conduction monitoring device, and the explosion-proof valve control circuit includes: A low-voltage power supply, wherein a positive electrode of the low-voltage power supply is connected to the first ends of all the conduction monitoring devices; A battery management chip, wherein the first end of the battery management chip is connected to the positive electrode of the low-voltage power supply, the second end of the battery management chip is connected to the negative electrode of the low-voltage power supply, and the third end of the battery management chip is connected to the second ends of all the conduction monitoring devices, wherein, when the mechanical explosion-proof valve is closed, the conduction monitoring device is in a disconnected state, and the battery management chip is disconnected from the low-voltage power supply to determine that the mechanical explosion-proof valve is in a closed state; when the mechanical explosion-proof valve is open, the conduction monitoring device is in a connected state, and the battery management chip is connected to the low-voltage power supply to determine that the mechanical explosion-proof valve is in an open state.

2. The explosion-proof valve status identification system according to claim 1, characterized in that: The third end of the battery management chip includes a first wake-up port, and the second ends of all the conduction monitoring devices are connected to the first wake-up port.

3. The explosion-proof valve status identification system according to claim 1, characterized in that: The third end of the battery management chip includes a plurality of second wake-up ports, and the second ends of different conduction monitoring devices are connected to different second wake-up ports.

4. The explosion-proof valve status identification system according to claim 1, characterized in that: The mechanical explosion-proof valve comprises: A valve body, wherein an exhaust passage is arranged on the valve body, and the valve body is provided with an air release port and an escape port connected to the exhaust passage; A movable member, the movable member can be movably arranged in the exhaust passage, and is used to open or close the air leakage port, so as to have a pressure relief state and a closed state, the air leakage port and the avoidance port are respectively arranged on opposite sides of the valve body, and the movable member is arranged opposite to the avoidance port along the moving direction; Wherein, the conduction monitoring device is connected to the movable part. In the closed state, the movable part closes the air vent to control the conduction monitoring device to be in a disconnected state. In the pressure relief state, the movable part opens the air vent to control the conduction monitoring device to be in a connected state.

5. The explosion-proof valve status identification system according to claim 4, characterized in that: The conduction monitoring device is fixed on the valve body and can be connected to the movable part through the avoidance opening, wherein the avoidance opening is used to avoid at least one of the conduction monitoring device and the movable part.

6. The explosion-proof valve status identification system according to claim 4, characterized in that: The movable part includes a cover body and a guide rod connected to each other. The cover body can be movably arranged on the air leakage port to be in the exhaust channel and completely cover the air leakage port. The avoidance port and the end of the guide rod away from the cover body are opposite. The conduction monitoring device is fixed on the valve body and connected to the inner side of the cover body.

7. The explosion-proof valve status identification system according to claim 1, characterized in that: 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 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, wherein the conduction monitoring device includes one of a micro-control switch, a push button switch or a patch switch.

8. The explosion-proof valve status identification system according to claim 7, characterized in that: The first conductive connection position includes a stepped movable conductive medium, or the second conductive connection position includes a stepped movable conductive medium.

9. The explosion-proof valve status identification system according to any one of claims 1 to 8, characterized in that: The battery pack is provided with: An explosion-proof valve installation port, wherein the explosion-proof valve installation port is used to install the mechanical explosion-proof valve; A positive power terminal, wherein an outer end of the positive power terminal is connected to the positive electrode of the low-voltage power supply, and an inner end of the positive power terminal is connected to the first ends of all the conduction monitoring devices and the first end of the battery management chip; A negative power supply terminal, wherein the outer end of the negative power supply terminal is connected to the negative electrode of the low-voltage power supply, and the inner end of the negative power supply terminal is connected to the second end of the battery management chip.

10. A vehicle, characterized in that: The vehicle comprises the explosion-proof valve status identification system according to any one of claims 1 to 9.

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