Automatic fire extinguishing system for electric vehicle parking spaces

Abstract

The present invention discloses an automatic fire extinguishing system for an electric vehicle parking space, comprising a thermal runaway isolation system, a detection system, a media system, and a firefighting access system, the detection system is installed inside the battery pack of the electric vehicle and performs fire monitoring for the inside of the battery pack, one end of the fire access system extends into the inside of the body of the electric vehicle and is connected to the inside of the battery pack, the other end of the fire access system extends from the body of the electric vehicle and communicates with the media system, the media system is installed outside the parking space of the electric vehicle, the fire access system includes a transport pipe and a quick coupling mechanism, the quick coupling mechanism is installed in the transport pipe, and the quick coupling mechanism is connected and disconnected to quickly connect the battery pack of the electric vehicle and the media system when there is a parked vehicle in the parking space, and quickly disconnect the battery pack of the electric vehicle and the media system when the vehicle is about to leave the parking space. The beneficial effect is to solve the problem of "fire extinguishing after combustion" that exists in the background technology.

Description

[Technical Field]

[0001] The present invention relates to the technical field of fire extinguishing for electric vehicles, and in particular to an automatic fire extinguishing system for parking spaces of electric vehicles. [Background technology]

[0002] With the rapid development of the new energy vehicle industry, public demands for the safety of lithium-ion batteries are becoming increasingly higher. Currently, with the increase in sales of new energy vehicles, the number of lithium-ion battery accidents is becoming more and more frequent. The spontaneous combustion situations occurring during the use of electric vehicles are also increasing year by year, causing more and more problems for the public. As of 2021, the number of new energy vehicles nationwide was 7.84 million. In 2021 alone, there were approximately 3,000 new energy vehicle fire accidents nationwide. According to the latest data released by the Fire and Rescue Bureau of the Ministry of Emergency Management of China on April 3, 2022, in the first half of 2022, there were a total of 640 new energy vehicle fires, an increase of 32% over the same period last year, equivalent to an average of seven new energy vehicle fires per day.

[0003] At the Beijing Institute of Technology's Automotive Electrification Academic Exchange Forum in July 2021, the Beijing Institute of Technology Laboratory classified the vehicle ignition conditions of new energy vehicles at the time, and found that the rate of ignition in a stationary state was 38.5%, and the rate of ignition in a charging state was 27.5%.

[0004] Therefore, how to ensure the safety of battery boxes is key to the smooth spread of the new energy industry in the future. Safety accidents caused by spontaneous combustion while parked are increasing linearly, and due to a lack of protective measures when parked, the risk increases exponentially, especially when charging while parked. Furthermore, in certain environments such as underground parking lots, small parking lots, or charging stations, fire prevention resources cannot be deployed or used smoothly, posing a significant risk to public safety and property safety.

[0005] In the past two years, a small number of parking lots have begun using firefighting water spray to extinguish fires in their parking spaces, such as the CN216092001U fire extinguishing device for new energy vehicle parking spaces, the CN216169473U fire isolation system for underground parking spaces, the CN113289283A fire prevention and extinguishing device and method for parking spaces, and the CN114432616A fire detection and isolation system and method for vehicle parking spaces. However, these external sprays are ineffective when it comes to extinguishing fires in electric vehicles, like trying to scratch an itch through your shoes. Electric vehicle fires are closely related to the charging and discharging of the internal power battery. Due to the limitations of electric vehicle body materials, external spray cannot resolve internal battery fires. Once a fire breaks out, the entire vehicle will often burn before external firefighting can begin. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention aims to solve the problems of the prior art and provide an automatic fire extinguishing system for parking spaces of electric vehicles. In order to solve the problem of "fire extinguishing after combustion" that exists in the current state of the art, the present invention proposes an automatic fire extinguishing system for parking spaces of electric vehicles, which uses a detection system to monitor the power battery pack inside the electric vehicle, and combines with a firefighting access system to deliver fire extinguishing media or inert gas into the interior of the electric vehicle, thereby achieving precise preventive control and targeted fire extinguishing, and further combines with an external thermal runaway isolation system to achieve fire extinguishing and isolated preventive control outside the electric vehicle. [Means for solving the problem]

[0007] The object of the present invention is achieved by the following technical means: An automatic fire extinguishing system for parking spaces of electric vehicles includes a thermal runaway isolation system that isolates a single corresponding parking space, and further includes a detection system, a media system, and a firefighting access system, wherein the detection system is installed inside a battery pack of the electric vehicle and performs fire monitoring for the inside of the battery pack, one end of the firefighting access system extends into the body of the electric vehicle and is connected to the inside of the battery pack, and the other end of the firefighting access system extends from the body of the electric vehicle and communicates with the media system, and the media system is installed outside the parking space of the electric vehicle.

[0008] Furthermore, the firefighting access system includes a transport pipeline and a quick coupling mechanism, and the quick coupling mechanism is installed in the transport pipeline. By connecting and disconnecting the quick coupling mechanism, the battery pack of the electric vehicle and the media system can be quickly connected when there is a parked vehicle in the parking space, and the battery pack of the electric vehicle and the media system can be quickly disconnected when the vehicle is about to leave the parking space.

[0009] Furthermore, the firefighting access system further includes a control unit, a one-way valve, and a nozzle, the nozzle being installed inside the body of the electric vehicle, the nozzle being attached to one end of the transport pipeline and directly connected to the battery pack, the one-way valve being installed near the quick coupling mechanism, the one-way valve controlling the one-way flow of the transport pipeline, and the control unit controlling the feeding of the medium from the medium system into the transport pipeline.

[0010] Furthermore, the detection system includes a detector and a detection battery, the detection battery for powering the detector is built into the detector, and the detector is electrically connected to the control unit.

[0011] Furthermore, the medium system includes a fire extinguishing medium device and an inert gas device, one end of the transport pipeline communicates with the fire extinguishing medium device and the inert gas device respectively, and a control unit selects the fire extinguishing medium or the inert gas and injects it into the transport pipeline.

[0012] Furthermore, the detection system and the control unit each have a built-in wireless communication module, and the detection system and the control unit realize data transmission and control via the wireless communication module. A data concentrator is integrated into the control unit, and the data concentrator is responsible for data processing and connection / disconnection control.

[0013] Furthermore, the quick coupling mechanism includes a quick coupling A and a quick coupling B, an installation cavity A is provided in the quick coupling A, a first valve body is provided in the installation cavity A, one end of the first valve body extends from the installation cavity A, and a first spring is fitted into the other end of the first valve body, the first valve body and the first spring are used to open and close the quick coupling A, an installation cavity B is provided in the quick coupling A, a second valve body is provided in the installation cavity B, one end of the second valve body extends from the installation cavity B, and a second spring is fitted into the other end of the second valve body, the second valve body and the second spring are used to open and close the quick coupling B, when the quick coupling A and the quick coupling B are connected, the quick coupling A and the quick coupling B are both in an open state, and the quick coupling A and the quick coupling B are in communication.

[0014] Furthermore, a connection cavity is provided at one end of the quick fitting B that is away from the second spring, and when the quick fitting B and the quick fitting A are connected, the one end of the quick fitting A that is away from the first spring is inserted into the connection cavity.

[0015] Furthermore, an expandable sleeve is fitted around the outer circumferential surface of the connection cavity, and the expandable sleeve is slidably fitted around the outer circumferential surface of the connection cavity. A return spring is provided between the expandable sleeve and the connection cavity, and the return spring contributes to the sliding return of the expandable sleeve. A through hole is provided on the side wall of the connection cavity, and a ball is installed in the through hole. The through hole is located within the sliding stroke range of the expandable sleeve, and when the expandable sleeve slides to compress the return spring, the ball is exposed, and when the expandable sleeve slides to return, the ball is covered.

[0016] Furthermore, the first valve body includes a first tip, a first sealing plate, and a first guide post, the first sealing plate and the first guide post are installed in the mounting cavity A, the cross-sectional area of ​​the first sealing plate is consistent with the cross-sectional area of ​​the mounting cavity A, one side of the first sealing plate is connected to the first tip, and the other side of the first sealing plate is connected to the first guide post, the first tip extends from the mounting cavity A, and a first spring is fitted in the first guide post; the second valve body includes a second tip, a second sealing plate, and a second guide post; A second spring is fitted into the second guide post, the second sealing plate and the second guide post are installed in the mounting cavity B, the cross-sectional area of ​​the second sealing plate matches the cross-sectional area of ​​the mounting cavity B, one side of the second sealing plate is connected to the second tip, the other side of the second sealing plate is connected to the second guide post, the second tip extends from the mounting cavity B, the first tip and the second tip are used in combination, the first tip expands and contracts in the mounting cavity A, and the second tip expands and contracts in the mounting cavity B.

[0017] Furthermore, the transport pipeline includes an internal pipeline and an external pipeline, the internal pipeline being installed inside the body of the electric vehicle and connecting the battery pack and the quick coupling mechanism, and the external pipeline being installed outside the body of the electric vehicle and connecting the quick coupling mechanism and the media system.

[0018] Furthermore, the thermal runaway isolation system includes a fire pipe and a plurality of spray heads, the fire pipe is installed above a single parking space, and the plurality of spray heads are evenly distributed on the fire pipe. [Effects of the Invention]

[0019] Compared with the prior art, the present invention has the following advantageous effects: The detection system monitors the power battery pack inside the electric vehicle and, in combination with the firefighting access system, delivers fire extinguishing media or inert gas into the interior of the electric vehicle, achieving precise prevention and fire extinguishing; and, in combination with the external thermal runaway isolation system, achieves fire extinguishing and isolation prevention and control outside the electric vehicle. The quick coupling mechanism of the firefighting access system enables quick and detachable connection between the external media system and the internal battery pack, thereby preventing thermal runaway when the electric vehicle is parked and quickly and precisely extinguishing fires inside the vehicle in the event of a fire. Wireless data transmission and control between the detection system and the control unit reduces the cost, connection effort, and error rate of manual connection compared to wired connections using wire harnesses, simplifies the on-site environment, and effectively avoids the series of problems associated with wired connections, such as cable deterioration.

[0020] The present invention will be described in detail below in combination with the drawings and specific embodiments. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a structural schematic diagram of the present invention. [Figure 2] FIG. 2 is a structural schematic diagram of quick fitting A. [Figure 3] FIG. 1 is a structural schematic diagram of quick fitting B. DETAILED DESCRIPTION OF THE INVENTION

[0022] As shown in Figures 1 to 3, the automatic fire extinguishing system for electric vehicle parking spaces includes a thermal runaway isolation system that isolates a single corresponding parking space, and further includes a detection system, a media system, and a firefighting access system. The detection system is installed inside the battery pack 1 of the electric vehicle and performs fire monitoring for the inside of the battery pack 1. One end of the firefighting access system extends into the body of the electric vehicle and is connected to the inside of the battery pack 1. The other end of the firefighting access system extends from the body of the electric vehicle and communicates with the media system. The media system is installed outside the electric vehicle parking space. The firefighting access system includes a transportation pipeline and a quick coupling mechanism. The quick coupling mechanism is installed in the transportation pipeline. By connecting and disconnecting the quick coupling mechanism, the electric vehicle battery pack 1 and the media system are quickly connected when a parked vehicle is in the parking space, and are quickly disconnected when the vehicle is about to leave the parking space. Electric vehicles, particularly those with environmentally friendly characteristics such as not consuming gasoline, have been on consumers' shopping lists in recent years, thanks to strong government support and popularization. Electric vehicles require charging to generate power. When charging a battery pack 1 while parked, high temperatures caused by charging and discharging, especially when the external air temperature is also high, can easily cause thermal runaway and lead to fires. Because the external casing of the battery pack 1 itself must be sealed, it is difficult to accurately extinguish a fire inside the battery pack 1 in an actual electric vehicle. This is why recent fire prevention technologies in this field have been limited to external spraying and separating the parking space. Based on external spraying and separating the parking space technologies, this invention proposes an innovative fire extinguishing technology that accurately monitors the battery pack 1 inside an electric vehicle, accurately prevents and controls thermal runaway, and accurately injects a fire extinguishing medium, thereby effectively extinguishing an internal fire.

[0023] The firefighting access system further includes a control unit 23, a one-way valve 22, and a nozzle 2. The nozzle 2 is installed inside the body of the electric vehicle. The nozzle 2 is attached to one end of the transport pipeline and directly connected to the battery pack 1. The one-way valve 22 is installed near the quick coupling mechanism and controls the one-way flow of the transport pipeline. The control unit 23 controls the supply of the fire extinguishing medium or inert gas into the transport pipeline. The control unit 23 controls the start and stop of the fire extinguishing medium device 7 or the inert gas device 19, thereby supplying the fire extinguishing medium or inert gas to the transport pipeline. The firefighting access system enables accurate prevention and control of the fire in the battery pack 1 inside the electric vehicle. The one-way valve 22 ensures that the transport pipeline only feeds in, not discharges, and feeding only into the battery pack 1 also contributes to sealing the case of the battery pack 1. The nozzle 2 is hermetically connected to the case of the battery pack 1, and when the quick coupling mechanism is connected, the electric vehicle's internal duct 3 and external duct 6 (located outside the body of the electric vehicle) are connected, and at this time, the fire extinguishing medium or inert gas of the medium system can enter the inside of the case of the battery pack 1 via the external duct 6 - quick coupling mechanism - one-way valve 22 - internal duct 3 - nozzle 2.

[0024] The detection system includes a detector and a detection battery, and the detection battery that supplies power to the detector is built into the detector, and the detector is electrically connected to the control unit 23. The detection system is powered by its own battery and can continuously monitor the inside of the battery pack 1, and the detector monitors detection elements including CO, VOC, H2, pressure, temperature, etc., and makes a comprehensive judgment as to whether there is a risk of thermal runaway in the battery pack 1 inside the electric vehicle or whether thermal runaway has occurred, and uploads a judgment signal to the control unit 23 for operation (the control unit 23 controls the injection of a fire extinguishing medium or an inert gas according to the situation).

[0025] The extinguishing medium system includes a fire extinguishing medium device 7 and an inert gas device 19. One end of the pipeline is connected to the fire extinguishing medium device 7 and the inert gas device 19, respectively. A control unit 23 selects the fire extinguishing medium or inert gas to access the pipeline. The fire extinguishing medium device 7 may be an external fire water tank, a CO2 tank, a perfluorohexanone tank, etc., and the external fire water may be a water connection port of the fire water system. The fire extinguishing medium device 7 and the inert gas device 19 are connected in parallel, and the control unit 23 selectively injects either the fire extinguishing medium or the inert gas into the pipeline. The inert gas device 19 includes an N2 bottle and a pump unit, which powers the N2 in the N2 bottle. Injecting N2 effectively prevents thermal runaway of the battery pack 1 during parking charging.

[0026] The quick coupling mechanism includes a quick coupling A4 and a quick coupling B5. An installation cavity A20 is provided in the quick coupling A4. A first valve body is provided in the installation cavity A20. One end of the first valve body extends from the installation cavity A20. A first spring 11 is fitted into the other end of the first valve body. The first valve body and the first spring 11 are used to open and close the quick coupling A4. An installation cavity B21 is provided in the quick coupling A4. A second valve body is provided in the installation cavity B21. One end of the second valve body extends from the installation cavity B21. A second spring 15 is fitted into the other end of the second valve body. The second valve body and the second spring 15 are used to open and close the quick coupling B5. When the quick coupling A4 and the quick coupling B5 are connected, the quick coupling A4 and the quick coupling B5 are both in an open state, and the quick coupling A4 and the quick coupling B5 are connected. Quick coupling A4 is installed on the body of the electric vehicle and communicates with the internal pipeline 3, and quick coupling B5 is installed on the external pipe, and when parking, quick coupling A4 and quick coupling B5 are connected to realize communication between the external pipe and the internal pipeline 3. When it is necessary to leave the parking lot, quick coupling B5 is unplugged and quick coupling A4 moves with the electric vehicle.

[0027] A connection cavity is provided at one end of the quick fitting B5 that is away from the second spring 15, and when the quick fitting B5 and the quick fitting A4 are connected, the one end of the quick fitting A4 that is away from the first spring 11 is inserted into the connection cavity.

[0028] A telescopic sleeve 16 is fitted around the outer periphery of the connection cavity, and the telescopic sleeve 16 slides against the outer periphery of the connection cavity. A return spring 17 is provided between the telescopic sleeve 16 and the connection cavity. The return spring 17 helps the telescopic sleeve 16 slide back. A through hole is provided on the side wall of the connection cavity, and a ball 18 is installed in the through hole. The through hole is located within the sliding stroke range of the telescopic sleeve 16. When the telescopic sleeve 16 slides and compresses the return spring 17, the ball 18 is exposed, and when the telescopic sleeve 16 slides back, the ball 18 is covered.

[0029] The first valve body includes a first tip 8, a first sealing plate 9, and a first guide post 10. The first sealing plate 9 and the first guide post 10 are installed in the mounting cavity A20. The cross-sectional area of ​​the first sealing plate 9 is consistent with that of the mounting cavity A20. One side of the first sealing plate 9 is connected to the first tip 8, and the other side of the first sealing plate 9 is connected to the first guide post 10. The first tip 8 extends from the mounting cavity A20. A first spring 11 is fitted in the first guide post 10. The second valve body includes a second tip 12, a second sealing plate 13, and a second guide post 14. A second spring 15 is fitted into the inner pillar 14, the second sealing plate 13 and the second guide pillar 14 are installed in the mounting cavity B21, the cross-sectional area of ​​the second sealing plate 13 matches the cross-sectional area of ​​the mounting cavity B21, one side of the second sealing plate 13 is connected to the second tip 12, the other side of the second sealing plate 13 is connected to the second guide pillar 14, the second tip 12 extends from the mounting cavity B21, the first tip 8 and the second tip 12 are used in combination, the first tip 8 extends into the mounting cavity A20, and the second tip 12 extends into the mounting cavity B21.

[0030] The quick coupling A4 is inserted into the connection cavity of the quick coupling B5, the telescopic sleeve 16 is slid to expose the ball 18, and the quick coupling A4 is continued to be inserted, the outer circumference of the quick coupling A4 is pressed outward against the ball 18, and the telescopic sleeve 16 is slid in the opposite direction to press the ball 18, thereby inserting and locking the quick coupling A4 and quick coupling B5. Inside, the first tip 8 and the second tip 12 come into contact and press against each other. In the mounting cavity A20, the first tip 8 receives a force to compress the first spring 11 in the opposite direction, and in the mounting cavity B21, the second tip 12 receives a force to compress the second spring 15 in the opposite direction. The first tip 8 and the second tip 12 are both variable diameter ends, so when they are pressed against each other, a gap is generated between the mounting cavity A20 and the first tip 8, and a gap is generated between the mounting cavity B21 and the second tip 12, and these two gaps directly connect the flow passages between the mounting cavities A20 and B21. Under normal conditions, the first sealing plate 9 seals the outlet of the mounting cavity A20, and the second sealing plate 13 seals the outlet of the mounting cavity B21.

[0031] The transport pipeline includes an internal pipeline 3 and an external pipeline 6. The internal pipeline 3 is installed inside the body of the electric vehicle and connects the battery pack 1 to the quick coupling mechanism, and the external pipeline 6 is installed outside the body of the electric vehicle and connects the quick coupling mechanism to the media system.

[0032] The thermal runaway isolation system includes a fire pipe and a plurality of spray heads, the fire pipe is installed above a single parking space, and the spray heads are evenly distributed on the fire pipe. The thermal runaway isolation system can be based on conventional technology.

[0033] The detection system and control unit each have a built-in wireless communication module, and the detection system and control unit achieve data transmission and control via the wireless communication module. A data concentrator is integrated into the control unit, and the data concentrator is responsible for data processing and connection / disconnection control. Specifically, the wireless communication module has wireless transmission and reception functions and establishes connection and realizes data exchange using an internal protocol and an internal ad hoc network method, thereby achieving the function of detecting and controlling thermal runaway. The detector of the detection system transmits detected data via the wireless communication module, and the control unit receives the data transmitted from the detector via the wireless communication module. The data concentrator processes the data transmitted from the detector and selectively controls the injection of N2 or fire extinguishing medium into the battery pack based on the data processing results. Specifically, a wireless transmission / reception hardware circuit is installed in the detector, and a wireless transmission / reception hardware circuit is installed in the control unit, and the detector and the control unit communicate data via a wireless network. The wireless network uses an ultra-low power consumption 802.15.4 system chip as the main chip and a 6LowPan protocol stack, which meets the low power consumption requirements and provides a wireless connection with stronger penetration ability and a longer transmission distance. The 802.15.4 system chip wireless standard provides a low-power, low-data-rate PHY across multiple frequency bands without the need for a license. It defines a MAC layer based on trusted and verified packets, with optional encryption and verification capabilities. The 6LowPan protocol stack includes an 802.15.4 2.4GHz PHY and an 802.15.4-based link layer. The MAC layer of the 802.15.4 system chip wireless standard adds synchronization, channel frequency modulation, priority, and time-based verification. The 6LowPan protocol stack includes a network layer providing path and end-to-end security, and an unreliable / reliable mesh transmission layer. The 6LowPan protocol stack defines slot timing, device synchronization methods, and slot channel frequency modulation characteristics. The 802.15.4 system chip wireless standard overcomes the barriers of current wireless communication technology.The role of the 6LowPan protocol is to achieve seamless integration of wireless communications and wired devices. Wireless networks built based on this protocol are highly reliable, with each device having multiple neighbors to which it can transmit data, even when the distance between devices is tens or hundreds of meters. This provides the necessary network hierarchy for high reliability. The current environment of new energy vehicles reduces the reliability of wireless communications, often preventing transmitted packets from reaching the receiver. If two independent transmitters transmit data on the same channel, they may corrupt each other's signals in the receiver's radio circuitry, requiring the transmitters to retransmit, increasing time and energy consumption. The wireless communication technology proposed here effectively solves the problem of the current unreliability of wireless communications. The detector is responsible for collecting and reporting current environmental status information to the network manager, a control unit. Furthermore, the wireless communication module, which is the wireless transceiver hardware circuit, includes a wireless integrated chip, a power chip, a hardware encryption chip, and an antenna. The wireless transceiver hardware circuit serves as a connection bridge between the wireless network and the detection and control system. The wireless transceiver hardware circuit is responsible for executing access point wireless functions and network management algorithms, thereby ensuring reliable network performance. The wireless network uses time synchronization to enable channel frequency modulation and adjust the duty cycle of wireless communication. The hardware encryption chip ensures that the entire communication cannot be deciphered by outsiders, and the power chip is used to power the wireless transceiver hardware circuit. If a wireless node suddenly turns off (fails), neighboring nodes of this wireless node will report a route warning after a certain period of time. The route warning prompts the network manager to attempt to recommunicate with the wireless node. After a certain period of communication failure, the network manager will discard the failed wireless node and re-establish a new wireless node route.The main chip's strong keys and key management, whitelist configuration, cryptographic quality random number generation, and message integrity checking, combined with hardware encryption chips, encrypt all transmitted data, significantly improves system security.

[0034] In describing the present invention, it should be understood that terms such as "upper," "middle," "outer," "inner," etc., indicate orientation or positional relationship and are merely intended to facilitate and simplify the description of the present invention, and are not intended to indicate or imply that the components or elements shown necessarily have a particular orientation or are configured and operated in a particular orientation, and therefore should not be understood to limit the present invention.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in all respects, the embodiments are illustrative and not restrictive, and the scope of the present invention is limited not by the above description but by the appended claims, and all changes that come within the meaning and range of equivalents of the claims are therefore intended to be embraced. Any reference signs in the claims should not be construed as limiting the relevant claims.

[0036] It should also be understood that although the present specification has been described through embodiments, each embodiment does not include only one independent technical solution, and this description form of the specification is for clarity only, and those skilled in the art should take the specification as a whole, and can appropriately combine the technical solutions of each example to form other embodiments that are understandable to those skilled in the art. [Explanation of symbols]

[0037] 1 battery pack 2 nozzles 3 Internal pipeline 4 Quick fitting A 5 Quick fitting B 6 External conduit 7 Fire extinguishing media equipment 8 1st tip 9 First sealing plate 10 First Information Pillar 11 First Spring 12 Second tip 13 Second sealing plate 14 Second Guide Pillar 15 Second spring 16 Elastic Sleeve 17 Return spring 18 balls 19 Inert gas equipment 20 Mounting cavity A 21 Mounting cavity B 22 One-way valve 23 Control Unit

Claims

1. 1. An automatic fire extinguishing system for electric vehicle parking spaces, comprising a thermal runaway isolation system isolating a single corresponding parking space, The electric vehicle further includes a detection system, a media system, and a firefighting access system, wherein the detection system is installed inside a battery pack of the electric vehicle and performs fire monitoring for the inside of the battery pack, one end of the firefighting access system extends into the body of the electric vehicle and is connected to the inside of the battery pack, and the other end of the firefighting access system extends from the body of the electric vehicle and communicates with the media system, and the media system is installed outside a parking space of the electric vehicle; the firefighting access system includes a pipeline, a control unit, a one-way valve, and a nozzle, the nozzle is installed inside the body of the electric vehicle, the nozzle is attached to one end of the pipeline and directly connected to the battery pack, the one-way valve controls one-way flow of the pipeline, and the control unit controls the feeding of the medium from the medium system into the pipeline; The automatic fire extinguishing system for parking spaces for electric vehicles is characterized in that the medium system includes a fire extinguishing medium device and an inert gas device, the other end of the transport pipeline is connected to the fire extinguishing medium device and the inert gas device, respectively, the control unit selects the fire extinguishing medium or the inert gas to inject into the transport pipeline, and injects the inert gas during parking charging.

2. 2. The automatic fire extinguishing system for an electric vehicle parking space according to claim 1, wherein the fire access system includes a quick coupling mechanism, and the quick coupling mechanism is installed in the transport pipeline, and the quick coupling mechanism is used to quickly connect the battery pack of the electric vehicle to the media system when there is a parked vehicle in the parking space, and to quickly disconnect the battery pack of the electric vehicle from the media system when the vehicle is about to leave the parking space by connecting and disconnecting the quick coupling mechanism.

3. An automatic fire extinguishing system for an electric vehicle parking space as described in Claim 2, characterized in that the one-way valve is installed near the quick coupling mechanism.

4. 4. The automatic fire extinguishing system for parking spaces of electric vehicles according to claim 3, wherein the detection system includes a detector and a detection battery, the detection battery for powering the detector is built into the detector, and the detector is electrically connected to the control unit.

5. 4. The automatic fire extinguishing system for parking spaces of electric vehicles according to claim 3, wherein the detection system and the control unit are each equipped with a wireless communication module, the detection system and the control unit realize data transmission and control via the wireless communication module, and a data concentrator is integrated into the control unit, which is responsible for data processing and connection / disconnection control.

6. 3. The automatic fire extinguishing system for electric vehicle parking spaces according to claim 2, wherein the quick coupling mechanism includes a quick coupling A and a quick coupling B, wherein an installation cavity A is provided in the quick coupling A, a first valve body is provided in the installation cavity A, one end of the first valve body extends from the installation cavity A, and a first spring is fitted into the other end of the first valve body, the first valve body and the first spring are used to open and close the quick coupling A, and a installation cavity B is provided in the quick coupling B, a second valve body is provided in the installation cavity B, one end of the second valve body extends from the installation cavity B, and a second spring is fitted into the other end of the second valve body, the second valve body and the second spring are used to open and close the quick coupling B, and when the quick coupling A and the quick coupling B are connected, the quick coupling A and the quick coupling B are both in an open state, and the quick coupling A and the quick coupling B are communicated with each other.

7. 7. The automatic fire extinguishing system for parking spaces for electric vehicles according to claim 6, wherein a connection cavity is provided at one end of the quick coupling B that is remote from the second spring, and when the quick coupling B and the quick coupling A are connected, the one end of the quick coupling A that is remote from the first spring is inserted into the connection cavity.

8. 8. The automatic fire extinguishing system for electric vehicle parking spaces according to claim 7, wherein a telescopic sleeve is fitted around the outer circumferential surface of the connection cavity, the telescopic sleeve being in sliding contact with the outer circumferential surface of the connection cavity, a return spring is provided between the telescopic sleeve and the connection cavity, the return spring contributes to the sliding return of the telescopic sleeve, a through hole is provided on the side wall of the connection cavity, a ball is installed in the through hole, the through hole is provided within the sliding stroke range of the telescopic sleeve, when the telescopic sleeve slides to compress the return spring, the ball is exposed, and when the telescopic sleeve slides to return, the ball is covered.

9. The first valve body includes a first tip, a first sealing plate, and a first guide post, the first sealing plate and the first guide post are installed in the mounting cavity A, the cross-sectional area of ​​the first sealing plate is consistent with the cross-sectional area of ​​the mounting cavity A, one side of the first sealing plate is connected to the first tip, the other side of the first sealing plate is connected to the first guide post, the first tip extends from the mounting cavity A, and a first spring is fitted on the first guide post; the second valve body includes a second tip, a second sealing plate, and a second guide post, the second guide post is fitted with a second spring, and the second sealing plate and a second guide post are installed in the mounting cavity B, the cross-sectional area of ​​the second sealing plate is compatible with the cross-sectional area of ​​the mounting cavity B, one side of the second sealing plate is connected to the second tip, the other side of the second sealing plate is connected to the second guide post, the second tip extends from the mounting cavity B, the first tip and the second tip are used in combination, the first tip extends and retracts within the mounting cavity A, and the second tip extends and retracts within the mounting cavity B.

10. 3. The automatic fire extinguishing system for parking spaces of electric vehicles according to claim 2, wherein the transport pipeline includes an internal pipeline and an external pipeline, the internal pipeline being installed inside the body of the electric vehicle and connecting the battery pack and the quick coupling mechanism, and the external pipeline being installed outside the body of the electric vehicle and connecting the quick coupling mechanism and the media system.

11. 2. The automatic fire extinguishing system for electric vehicle parking spaces as described in claim 1, wherein the thermal runaway isolation system includes a fire extinguishing pipe and a plurality of spray heads, the fire extinguishing pipe is installed above a single parking space, and the plurality of spray heads are evenly distributed on the fire extinguishing pipe.

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