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 automobile industry, the public's requirements for the safety of lithium-ion batteries are becoming higher and higher. At present, with the increase in sales of new energy vehicles, there are more and more accidents involving lithium-ion batteries. The spontaneous combustion situations that exist in the process of using 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 nearly 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 fires in new energy vehicles, an increase of 32% over the same period last year, equivalent to an average of seven new energy vehicles having combustion accidents 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 states of new energy vehicles at the time, finding 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 the key to whether the new energy industry can be smoothly promoted in the future. Safety accidents caused by spontaneous combustion while parked will increase linearly, and due to a lack of protective measures when parked, the risk will increase exponentially, especially when charging while parked. Furthermore, in certain environments such as underground parking lots, small parking lots, or charging stations, fire protection resources cannot be deployed or used smoothly, posing a significant risk to public safety and property safety.

[0005] In the past two years, a few parking lots have started to use fire water spray to extinguish fires in parking spaces, such as the fire extinguishing device for new energy vehicle parking spaces CN216092001U, the fire separation system for underground parking spaces CN216169473U, the fire prevention and extinguishing device and method for parking spaces in parking lots CN113289283A, and the fire detection and isolation system and method for automobile parking spaces CN114432616A, but such external spraying does not play a real role in extinguishing fires in electric vehicles, like scratching an itch on your foot through your shoes. Electric vehicle fires are closely related to the charging and discharging of the internal power battery, and due to the limitations of the body materials of electric vehicles, external spraying cannot solve the fires of the internal batteries. Once a fire breaks out, in most cases, the entire car will 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 the parking space of an electric vehicle. In order to solve the problem of "fire extinguishing after combustion" existing in the background technical situation, the present invention proposes an automatic fire extinguishing system for the parking space of an electric vehicle, which uses a detection system to monitor the power battery pack inside the electric vehicle, and combines with a fire access system to realize the injection of fire extinguishing medium or inert gas into the inside of the electric vehicle, thereby realizing precise prevention control and targeted fire extinguishing, and further combines with an external thermal runaway isolation system to realize fire extinguishing and isolation prevention 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 a parking space of an electric vehicle includes a thermal runaway isolation system for isolating 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 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, 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 fire 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, when there is a parked vehicle in the parking space, the battery pack of the electric vehicle and the media system can be quickly connected, and when the vehicle is about to leave the parking space, the battery pack of the electric vehicle and the media system can be quickly disconnected.

[0009] Furthermore, the fire access system further includes 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 a transport pipeline and directly connected to a battery pack, the one-way valve is installed near a quick coupling mechanism, the one-way valve controls the one-way flow of the transport pipeline, and the control unit controls 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 an extinguishing medium device and an inert gas device, one end of the transport pipeline communicates with the extinguishing medium device and the inert gas device respectively, and the extinguishing medium or the inert gas is selected and injected into the transport pipeline by a control unit.

[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 in the control unit, and the data concentrator is responsible for data processing and connection / disconnection control.

[0013] Further, 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, 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.

[0014] Furthermore, 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.

[0015] Furthermore, an expandable sleeve is fitted onto the outer circumferential surface of the connection cavity, and the expandable sleeve is slidably contacted with 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 attached in the through hole, and the through hole is provided within the sliding stroke range of the expandable sleeve. 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, 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 pillar, the second sealing plate and the second guide pillar 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 pillar, 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 in-vehicle pipeline and an external pipeline, the in-vehicle pipeline is installed inside the body of the electric vehicle and serves to connect the battery pack and the quick coupling mechanism, and the external pipeline is installed outside the body of the electric vehicle and serves to connect 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. Effect of the Invention

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The detection system monitors the power battery pack inside the electric vehicle, and combines with the fire access system to realize the delivery of fire extinguishing medium or inert gas into the electric vehicle, thereby realizing precise prevention control and precise fire extinguishing, and further combines with the external thermal runaway separation system to realize fire extinguishing and separation prevention control outside the electric vehicle. The quick coupling mechanism of the fire access system realizes a quick and detachable connection between the external medium system and the internal battery pack, thereby realizing thermal runaway prevention control when the electric vehicle is parked, and rapid and precise fire extinguishing inside when a fire occurs. The wireless data transmission and control between the detection system and the control unit reduces the cost of connection by wire harness, the amount of connection work, and the error rate due to manual connection compared with wired connection, simplifies the field environment, and effectively avoids a series of problems of cable deterioration existing in wired connection.

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

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

[0022] As shown in Figures 1 to 3, the automatic fire extinguishing system for the parking space of the electric vehicle 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 inside of the body of the electric vehicle and is connected to the inside of the battery pack 1, and 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 parking space of the electric vehicle, the firefighting access system includes a transport pipeline and a quick coupling mechanism, the quick coupling mechanism is installed in the transport pipeline, and by connecting and disconnecting the quick coupling mechanism, when there is a parked vehicle in the parking space, the battery pack 1 of the electric vehicle and the media system are quickly connected, and when the vehicle is about to leave the parking space, the battery pack 1 of the electric vehicle and the media system are quickly disconnected. Electric vehicles, in particular, have environmental protection characteristics of not consuming gasoline, and in recent years, with strong government support and popularization, have been on consumers' purchase lists. Electric vehicles need to be charged to obtain power, and when the battery pack 1 is charged while parked, it is easy to cause thermal runaway and even fires when the battery pack 1 is charged at high temperatures due to charging and discharging, especially when the external air temperature is also high. Since the external case of the battery pack 1 itself is required to be sealed, it is difficult to accurately extinguish the inside of the battery pack 1 in an actual electric vehicle, which is the reason why the fire protection technology in this field in recent years is limited to external spraying and separation of the parking space. Based on the technology of external spraying and separation of the parking space, the present invention innovatively proposes a technology for extinguishing a fire by accurately monitoring the battery pack 1 inside the electric vehicle, accurately preventing and controlling thermal runaway, and accurately injecting a fire extinguishing medium, and when a fire breaks out inside, it is surely effective to extinguish the fire inside.

[0023] The firefighting access system further includes a control unit 23, a one-way valve 22, and a nozzle 2, the nozzle 2 being installed inside the body of the electric vehicle, the nozzle 2 being attached to one end of the transport pipeline and directly connected to the battery pack 1, the one-way valve 22 being installed near the quick coupling mechanism, the one-way valve 22 controlling the one-way flow of the transport pipeline, and the control unit 23 controlling the medium feeding from the medium system into the transport pipeline. The control unit 23 realizes the supply of the fire extinguishing medium or the inert gas to the transport pipeline by controlling the start and stop of the fire extinguishing medium device 7 or the inert gas device 19. The firefighting access system enables accurate prevention and control of the battery pack 1 inside the electric vehicle and accurate extinguishing. The one-way valve 22 can ensure that the transport pipeline only feeds in and does not discharge, 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 in-vehicle duct 3 and the external duct 6 (located outside the body of the electric vehicle) are connected, and at this time, the 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-in-vehicle duct 3-nozzle 2.

[0024] The detection system includes a detector and a detection battery, the detection battery for powering the detector is built in 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., comprehensively judges 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 medium system includes an extinguishing medium device 7 and an inert gas device 19, one end of the transport pipeline communicates with the extinguishing medium device 7 and the inert gas device 19 respectively, and the extinguishing medium or inert gas is selected by the control unit 23 to access the transport pipeline. The extinguishing medium device 7 may be an external fire water tank or a CO2 tank or a perfluorohexanone tank, etc., and of course, the external fire water may be one water connection port of the fire water system. The extinguishing medium device 7 and the inert gas device 19 are connected in parallel, and the control unit 23 arbitrarily selects one of the fire medium and the inert gas to inject into the transport pipeline. The inert gas device 19 includes an N2 bottle and a pump unit, and the pump unit powers the N2 in the N2 bottle. During parking charging, the injection of N2 can effectively prevent the thermal runaway of the battery pack 1.

[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 in communication. The quick coupling A4 is installed on the body of the electric vehicle and communicates with the in-vehicle pipeline 3, and the quick coupling B5 is installed on the external pipe, and when parking, the quick coupling A4 and the quick coupling B5 are connected to realize the communication between the external pipe and the in-vehicle pipeline 3. When it is necessary to leave the parking lot, the quick coupling B5 is unplugged and the quick coupling A4 moves with the electric vehicle.

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

[0028] A telescopic sleeve 16 is fitted around the outer circumferential surface of the connection cavity, and the telescopic sleeve 16 is slidably contacted with the outer circumferential surface of the connection cavity. A return spring 17 is provided between the telescopic sleeve 16 and the connection cavity. The return spring 17 contributes to the sliding return of the telescopic sleeve 16. A through hole is provided on the side wall of the connection cavity, and a ball 18 is attached in the through hole. The through hole is provided within the sliding stroke range of the telescopic sleeve 16. When the telescopic sleeve 16 slides to compress the return spring 17, the ball 18 is exposed, and when the telescopic sleeve 16 slides to return, 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 the cross-sectional area of ​​the mounting cavity A20, one side of the first sealing plate 9 is connected to the first tip 8, 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, and 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 is adapted to 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, the quick coupling A4 is continued to be inserted, the outer circumference of the quick coupling A4 presses the ball 18 outward, and the telescopic sleeve 16 is slid in the opposite direction to press the ball 18, so that the quick coupling A4 and the quick coupling B5 are inserted and locked. Inside, the first end 8 and the second end 12 come into contact and press against each other. In the mounting cavity A20, the first end 8 receives a force to compress the first spring 11 in the opposite direction, and in the mounting cavity B21, the second end 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 that 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 the two gaps directly communicate the flow passage between the mounting cavity A20 and the mounting cavity 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 in-vehicle pipeline 3 and an external pipeline 6. The in-vehicle pipeline 3 is installed inside the body of the electric vehicle and provides communication between the battery pack 1 and the quick coupling mechanism, and the external pipeline 6 is installed outside the body of the electric vehicle and provides communication between the quick coupling mechanism and the media system.

[0032] The thermal runaway separation 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. The thermal runaway separation system can use the conventional technology.

[0033] 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 through the wireless communication module. A data concentrator is integrated in the control unit, and the data concentrator is responsible for data processing and connection / cutoff control. Specifically, the wireless communication module has a wireless transmission / reception function, and establishes a connection and realizes data exchange through 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 through the wireless communication module, and the control unit receives the data transmitted from the detector through the wireless communication module. The data concentrator processes the data transmitted from the detector, and selectively controls to inject N2 or a fire extinguishing medium into the battery pack based on the data processing result. Specifically, a wireless transmission and reception hardware circuit is installed in the detector, and a wireless transmission and reception hardware circuit is installed in the control unit. The detector and the control unit communicate data through a wireless network. The wireless network uses an ultra-low power consumption 802.15.4 system chip as the main chip and uses a 6LowPan protocol stack, which meets the low power consumption requirement, and the provided wireless connection has stronger penetration ability and longer transmission distance. The 802.15.4 system chip wireless standard provides low power consumption, low data rate PHY in multiple frequency bands without the need to apply for a license, the 802.15.4 system chip wireless standard defines a MAC layer based on trusted and verified packets, and has optional encryption and verification functions, the 6LowPan protocol stack has one 802.15.4 2.4GHz PHY and one link layer based on 802.15.4, and adds synchronization, channel frequency modulation, priority and time-based verification to the MAC layer of the 802.15.4 system chip wireless standard, the 6LowPan protocol stack has one network layer that provides path and end-to-end security, and one unreliable / reliable mesh transmission layer, and the 6LowPan protocol stack specifies slot timing, device synchronization maintenance method and slot channel frequency modulation characteristics. The 802.15.4 system chip wireless standard eliminates the barriers of current wireless communication technology.The role of the 6LowPan protocol is to realize the seamless integration of wireless communication and wired devices. A wireless network built on the basis of the protocol is a highly reliable network, and each device has multiple neighboring devices to which it can transmit data, even when the distance between the devices is tens to hundreds of meters, thereby providing the line hierarchy necessary to achieve high reliability. The current environment of new energy vehicles reduces the reliability of wireless communication, and transmitted packets are often blocked from being transmitted to the receiver. Assuming that two independent transmitters transmit data on the same channel, they may corrupt each other's signals to the radio circuit of the receiver, so that the transmitters need to retransmit, causing an increase in time and energy consumption. The wireless communication technology of the present application can well solve the problem of the low reliability of current wireless communication. The detector is responsible for collecting and reporting the current environment status information to the control unit, which is the network manager. Furthermore, the wireless communication module, which is the wireless transmission and reception hardware circuit, includes a wireless integrated chip, a power chip, a hardware encryption chip, and an antenna, and the wireless transmission and reception hardware circuit is a connection bridge between the wireless network and the detection control system, and the wireless transmission and reception hardware circuit is responsible for executing the access point wireless function and the network management algorithm, thereby ensuring the reliability of the network performance, and the wireless network enables channel frequency modulation and adjusts the duty ratio of wireless communication by using time synchronization. The hardware encryption chip ensures that the entire communication cannot be deciphered by outsiders, and the power chip is used to power the wireless transmission and reception hardware circuit. If a wireless node is suddenly turned off (failed), the neighboring nodes of this wireless node will report a route warning after a certain time, and the route warning will cause the network manager to try to recommunicate with the wireless node, and after the communication failure continues for a certain period of time, the network manager will discard the failed wireless node and rematch a new wireless node route.The main chip's strong keys and key management, whitelist settings, cryptographic quality random number generation, and message integrity checking, combined with hardware encryption chips, etc., encrypt all transmitted data, greatly improving the security of the system.

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

[0035] As will be apparent to those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments, and 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 equivalent elements of the claims are therefore intended to be embraced in the present invention. 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 by embodiments, each embodiment does not include only one independent technical solution, and this description form of the specification is merely for clarity, and those skilled in the art should take the specification as a whole, and may appropriately combine the technical solutions of each embodiment to form other embodiments that are understandable to those skilled in the art. [Explanation of symbols]

[0037] 1 Battery pack 2 Nozzles 3. Internal ductwork 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 Guide 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 Ball 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 an electric vehicle parking space, comprising a thermal runaway isolation system isolating a single corresponding parking space, the system comprising: An automatic fire extinguishing system for a parking space of an electric vehicle, further comprising a detection system, a media system, and a fire access system, the detection system being mounted inside a battery pack of the electric vehicle and performing fire monitoring for the inside of the battery pack, one end of the fire access system extending into the inside of a body of the electric vehicle and connected to the inside of the battery pack, the other end of the fire access system extending from the body of the electric vehicle and communicating with the media system, and the media system being installed outside the parking space of the electric vehicle.

2. 2. The automatic fire extinguishing system for an electric vehicle parking space according to claim 1, wherein the fire access system includes a transport pipeline and a quick coupling mechanism, 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 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 by connecting and disconnecting the quick coupling mechanism.

3. 3. The automatic fire extinguishing system for a parking space of an electric vehicle according to claim 2, wherein the fire access system further comprises 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 a transport pipeline and directly connected to a battery pack, the one-way valve is installed near a quick coupling mechanism, the one-way valve controls the one-way flow of the transport pipeline, and the control unit controls the feeding of the medium from the medium system into the transport pipeline.

4. 4. The automatic fire extinguishing system for parking spaces of electric vehicles according to claim 3, characterized in that 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. The automatic fire extinguishing system for electric vehicle parking spaces as claimed in claim 3, characterized in that the medium system includes an extinguishing medium device and an inert gas device, one end of the transport pipeline communicates with the extinguishing medium device and the inert gas device respectively, and the extinguishing medium or the inert gas is selected and injected into the transport pipeline by the control unit.

6. The automatic fire extinguishing system for an electric vehicle parking space according to claim 3, characterized in that the detection system and the control unit are each built-in with a wireless communication module, the detection system and the control unit realize data transmission and control through the wireless communication module, a data concentrator is integrated in the control unit, and the data concentrator is responsible for data processing and connection / cutoff control.

7. 3. The automatic fire extinguishing system for an electric vehicle parking space according to claim 2, wherein 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, 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.

8. The automatic fire extinguishing system for a parking space of an electric vehicle as described in claim 7, characterized in that a connection cavity is provided at one end of the quick coupling B away 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 away from the first spring is inserted into the connection cavity.

9. 9. The automatic fire extinguishing system for an electric vehicle parking space according to claim 8, characterized in that: a telescopic sleeve is fitted on the circumferential outer side of the connection cavity, the telescopic sleeve is slidably contacted with the circumferential outer side 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.

10. 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 into the first guide post; the second valve body includes a second tip, a second sealing plate and a second guide post, the second spring is fitted into the second guide post, and the second sealing plate and the second guide pillar is 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 pillar, 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 in the mounting cavity A, and the second tip extends and retracts in the mounting cavity B.

11. 3. The automatic fire extinguishing system for a parking space of an electric vehicle according to claim 2, wherein the transport pipeline includes an in-vehicle pipeline and an external pipeline, the in-vehicle pipeline is installed inside the body of the electric vehicle and serves to connect the battery pack and the quick coupling mechanism, and the external pipeline is installed outside the body of the electric vehicle and serves to connect the quick coupling mechanism and the media system.

12. 2. The automatic fire extinguishing system for an electric vehicle parking space as claimed 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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