A flame guide device for electric vehicle power batteries

Abstract

The application discloses a kind of electric vehicle power battery flame guide device, including installation side plate, installation recess, first fireproof plate, automatic control component, first fireproof plate rotation, storage groove and second fireproof plate, through the storage groove top of first fireproof plate outer wall by torsional spring articulation second fireproof plate, when first fireproof plate is driven to unfold, second fireproof plate is automatically opened under the torsional spring rotation force, with first fireproof plate between it forms Y-shaped cross-section structure with triangular space, realizes double-layer physical barrier, can greatly reduce the surface temperature of first fireproof plate towards passenger side, prevent the scald caused by escapee leg mistake touch, triangular space itself constitutes inclined flow channel in Y-shaped structure, when flame contacts inclined plate face, it is forced to deflect to vehicle bottom middle part and diffuses along passage front and back after being deflected.

Description

Technical Field

[0001] This invention relates to the field of vehicle fire prevention technology, specifically to a flame guiding device for electric vehicle power batteries. Background Technology

[0002] With the increasing prevalence of large batteries with high energy density and long driving range in electric vehicles, the handling of battery fires has become increasingly important. Because there are few effective methods for extinguishing electric vehicle battery fires, and the batteries are usually installed close to the vehicle chassis, the confined space further hinders effective firefighting, allowing the fire to spread rapidly to the vehicle body, endangering the safety of surrounding people and vehicles. Therefore, when occupants discover a fire in the vehicle's power battery, they need to quickly evacuate the vehicle, and adjacent vehicles should be moved away immediately. However, due to the rapid ignition speed and high temperature of the power battery, which sprays high-temperature flames and toxic gases in all directions, occupants are highly likely to be unable to escape in time or suffer burns during the escape attempt. Furthermore, the high-temperature flames and toxic gases can prevent drivers of adjacent vehicles from entering and leaving, causing nearby vehicles to catch fire and expanding the fire's reach.

[0003] Utility model CN220562548U discloses a vehicle-mounted device and an electric vehicle that help people escape and reduce the fire range in the event of an electric vehicle battery pack fire. The vehicle-mounted device for reducing the fire range includes a recessed equipment compartment and a fireproof and heat-insulating curtain with one end fixedly connected to the bottom of the equipment compartment. The second end of the fireproof and heat-insulating curtain is connected to a cover plate that can cover the opening of the equipment compartment. A locking ring is fixedly provided on the side of the cover plate facing the bottom of the equipment compartment. A lock body that locks the locking ring is fixedly provided at the bottom of the equipment compartment. An ejector that pushes the cover plate and the fireproof and heat-insulating curtain out of the equipment compartment is fixedly provided at the bottom of the equipment compartment. When a battery fire occurs, the fireproof and heat-insulating curtain can be lowered manually or automatically. After unfolding, the fireproof and heat-insulating curtain hangs down to the ground, forming a fireproof barrier between the vehicle chassis and the ground. It can block the high-temperature flames and scorching toxic gases emitted by the burning battery pack for a period of time, which can not only protect the occupants of the vehicle to escape safely, but also prevent people and property around the burning vehicle from being injured for a certain period of time, thus reducing fire losses.

[0004] Although the device can unfold and lower the fireproof and heat-insulating curtain to the ground to provide fire protection when the battery pack catches fire, the fireproof and heat-insulating curtain is made of flexible material. When the battery pack catches fire, the battery thermal runaway jet speed is fast. Under such high dynamic pressure impact, the flexible curtain is very likely to swing violently, curl at the edges or even tear. Once the lower edge of the curtain is blown up, the flames that were originally blocked will burst out from the gap to the side, making it impossible for people inside the vehicle to get out and people outside the vehicle to approach. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention proposes a flame guiding device for electric vehicle power batteries, which solves the problem mentioned in the background art that fireproof and heat-insulating curtains, being made of flexible materials, are prone to swaying, curling, or even tearing under high dynamic pressure impact when the battery pack catches fire, leading to flames bursting out.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a flame guiding device for an electric vehicle power battery, comprising mounting side plates installed on both sides of a vehicle assembly, a battery pack assembly being provided at the bottom of the vehicle assembly, mounting grooves being provided on both sides of the mounting side plates, and a first fireproof plate being rotatably connected inside each mounting groove; The vehicle assembly is equipped with an automatic control component that can control the rotation of a first fireproof plate. The outer wall of the first fireproof plate is provided with a storage groove. The top of the inner side of the storage groove is rotatably connected to a second fireproof plate via a torsion spring. The second fireproof plate can rotate outward under the action of the torsion spring. When the first fireproof plate rotates and unfolds, the second fireproof plate can unfold under the rotational force of the torsion spring, forming a Y-shaped structure with a triangular space between it and the first fireproof plate.

[0007] Furthermore, the first fireproof board includes a first plate, a second plate, and a first plug-in plate. The first plate is rotatably connected to the mounting groove, and the first plug-in plate is fixedly connected to the upper end of the second plate. The first plug-in plate is inserted into the bottom of the first plate and can slide. An elastic component is provided between the first plug-in plate and the interior of the first plate, which enables the second plate and the first plug-in plate to slide outward relative to the first plate.

[0008] Furthermore, the second fireproof board includes a third board, a fourth board, and a second insert plate. The storage groove is disposed on the outer wall of the second board. The third board is rotatably connected to the storage groove. The second insert plate is fixedly connected to the bottom of the third board. The second insert plate is inserted into the fourth board and can slide. An elastic component is disposed between the second insert plate and the fourth board, which allows the fourth board to slide outward relative to the second insert plate.

[0009] Furthermore, the inner bottom of the storage groove is rotatably connected to a rotating roller via a torsion spring. One end of the rotating roller is fixedly connected to the fireproof fabric, and the other end of the fireproof fabric is fixedly connected to the outer wall of the fourth plate. The fireproof fabric is normally rolled up on the rotating roller. The rotational force of the torsion spring on the second fireproof plate is greater than the rotational force of the torsion spring on the rotating roller. When the second fireproof plate is unfolded outward, the fireproof fabric is unfolded.

[0010] Furthermore, the second connector plate has multiple nozzles near the outer wall of the battery pack assembly, and the outer wall of one side of the third plate has a fire extinguishing device interface, which passes through the second plate. The interior of the third plate has a channel that communicates with the fire extinguishing device interface and each nozzle.

[0011] Furthermore, an extension tube is detachably connected to the interface of the fire extinguishing device, and a connector is fixedly connected to the end of the extension tube. An embedded groove is provided on the outer wall of the second plate, and the extension tube and the connector are inserted into the embedded groove.

[0012] Furthermore, the automatic control component includes a wire rope, guide wheels, take-up rollers, transmission rods, and a dual-axis motor. Assembly slots are provided on both sides of the mounting grooves on both sides. A guide wheel is rotatably connected inside each assembly slot. A wire rope is fixedly connected to the outer wall of each second plate. The wire rope adheres to the outer wall of the guide wheel and is wound around the outer wall of the take-up roller. The take-up roller is located inside the vehicle assembly. A transmission rod is detachably connected between two take-up rollers on the same side. The two transmission rods are detachably connected to the rotating ends on both sides of the dual-axis motor. The dual-axis motor is installed inside the vehicle assembly. Rotation of the dual-axis motor drives the transmission rods to rotate, thereby causing the take-up roller to extend the wire rope, allowing the first fireproof plate to unfold outwards.

[0013] Furthermore, a manual control component is installed on the transmission rod, which is used to cause the first fireproof plate to unfold outward when the power to the vehicle assembly is lost.

[0014] Furthermore, the manual control assembly includes a first engagement disc, a second engagement disc, a pull-out steel cable, a return spring, a blocking block, and a rotating ring. The transmission rod is divided into two sections. The first engagement disc is detachably connected to the end of one section, and the second engagement disc is slidably connected to the outer wall of the other section. The blocking block is fixedly connected to the outer wall of the other section of the transmission rod. A return spring is sleeved on the outer wall of the transmission rod between the blocking block and the second engagement disc. The first engagement disc and the second engagement disc are engaged. A rotating ring is rotatably connected to the outer wall of the second engagement disc. A pull-out steel cable is detachably connected to the rotating ring. The multiple pull-out steel cables converge into the cabin of the vehicle assembly and are equipped with a pull-out handle. By pulling the handle, each second engagement disc can slide on the outer wall of the transmission rod and compress the return spring, thereby disengaging the first engagement disc from the second engagement disc and allowing the first fireproof plate to unfold outward by gravity.

[0015] Furthermore, a counterweight is fixedly connected to the surface of the fireproof fabric.

[0016] The beneficial effects of the above-mentioned electric vehicle power battery flame guiding device are: 1. In this invention, the second fireproof board is hinged to the top of the storage groove on the outer wall of the first fireproof board by a torsion spring. When the first fireproof board is driven to unfold, the second fireproof board automatically opens under the rotational force of the torsion spring, forming a Y-shaped cross-section structure with a triangular space between it and the first fireproof board, achieving double-layer physical barrier. This can significantly reduce the surface temperature of the first fireproof board facing the occupant, preventing burns caused by accidental contact with the legs of escaping personnel. The first fireproof board is composed of a first plate, a second plate, and a first plug-in plate forming an elastic telescopic structure. The second fireproof board is composed of a third plate, a fourth plate, and a second plug-in plate forming an elastic telescopic structure. When the baffle assembly unfolds, the elastic component pushes the second and fourth plates to automatically extend outward, adaptively filling the height difference formed by ground pits and ensuring effective contact between the bottom of the board and the ground, thereby improving the fireproof sealing performance under different road conditions.

[0017] 2. In this invention, a rotating roller is installed at the bottom of the storage groove by means of a torsion spring, and the two ends of the fireproof cloth are respectively fixed to the rotating roller and the fourth plate. The counterweight is connected to the surface of the fireproof cloth. During the unfolding of the second fireproof plate, the rolled-up fireproof cloth is released simultaneously, and under the action of the counterweight, the cloth hangs down and adheres to the ground, sealing the remaining gap between the fourth plate and the ground, and further suppressing the flames from the bottom.

[0018] 3. In this invention, multiple nozzles are provided on the outer wall of the second connector plate facing the battery pack assembly. The third plate has a channel connecting the fire extinguishing device interface and the nozzles. When extinguishing a fire, the external fire extinguishing device is connected to the fire extinguishing device interface, and the extinguishing medium can be sprayed directly onto the surface of the battery pack assembly through the channel from the nozzles. This allows firefighters to extinguish the fire from a safe location away from the vehicle assembly, reducing the risk of injury from an explosion. By setting a detachable extension tube, one end of which is connected to the fire extinguishing device interface, and the other end is fixed with a connector and embedded in the inner groove of the outer wall of the second plate, the actual connection position of the fire extinguishing device is moved to the middle area of ​​the first fireproof plate, thereby avoiding personnel being exposed to the direct flame attack range during connection operations.

[0019] 4. In this invention, the triangular space formed by the first fireproof plate and the second fireproof plate in the Y-shaped structure itself constitutes an oblique flow channel. When the flame comes into contact with the inclined plate surface, it is forced to deflect towards the middle of the bottom of the vehicle and spread back and forth along the channel. This can both prevent the flame from impacting the bottom seal of the door directly and reduce the upward amplitude of the flame. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1This is a schematic diagram of the structure of a flame guiding device for an electric vehicle power battery according to the present invention; Figure 2 This is a front view schematic diagram of the flame guiding device in this invention; Figure 3 This is a schematic diagram of the bottom structure of the flame guiding device in this invention; Figure 4 In this invention Figure 3 Enlarged structural diagram of section A; Figure 5 This is a schematic diagram of the fireproof board assembly structure in this invention; Figure 6 In this invention Figure 5 Enlarged structural diagram of section B; Figure 7 This is a schematic diagram of the exploded structure of the fireproof board assembly in this invention; Figure 8 This is a schematic diagram of the automatic control component structure in this invention; Figure 9 In this invention Figure 8 Enlarged structural diagram of section C; Figure 10 This is a schematic diagram of the extension tube structure in this invention.

[0022] Figure label: 100. Vehicle assembly; 101. Battery pack assembly; 102. Mounting side panel; 103. Assembly slot; 104. Mounting recess; 200. First fireproof board; 201. Second fireproof board; 202. Fireproof fabric; 203. First board material; 204. Second board material; 205. First connector plate; 206. Third board material; 207. Fourth board material; 208. Second connector plate; 209. Spray nozzle; 210. Fire extinguishing device interface; 211. Extension pipe; 212. Embedded groove; 214. Connector; 215. Storage groove; 216. Rotating roller; 217. Counterweight; 300. Automatic control components; 301. Steel wire rope; 302. Guide wheel; 303. Take-up roller; 304. Drive rod; 305. Dual-axis motor; 400. Manual control component; 401. First engagement plate; 402. Second engagement plate; 403. Pull-out steel cable; 404. Return spring; 405. Block; 406. Rotating ring. Detailed Implementation

[0023] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0024] like Figure 1 , Figure 2 as well as Figure 3 The diagram shows a preferred embodiment of the electric vehicle power battery flame guiding device of the present invention. This embodiment includes mounting side plates 102 installed on both sides of a vehicle assembly 100. A battery pack assembly 101 is located at the bottom of the vehicle assembly 100. Mounting grooves 104 are provided on the mounting side plates 102. A first fireproof plate 200 is rotatably connected inside the mounting grooves 104. An automatic control component 300 is installed inside the vehicle assembly 100. The automatic control component 300 controls the rotation of the first fireproof plate 200. In this embodiment, when the battery pack assembly 101 catches fire, a sensor sends a signal, causing the automatic control component 300 to activate and extend the first fireproof plates 200 outwards to contact the ground. This forms a rigid fireproof barrier on both sides of the vehicle assembly 100, preventing the battery fire from spraying outwards from both sides of the vehicle assembly 100, thus preventing situations where people inside the vehicle cannot get out or people outside the vehicle cannot approach.

[0025] Because the surface temperature of the single-layer first fireproof plate 200 increases when blocking flames from the battery pack assembly 101, passengers inside the vehicle are easily burned if their legs touch the first fireproof plate 200 when getting out of the vehicle. To prevent this from happening, the specific structure can be as follows: Figure 4 In the embodiment shown, the outer wall of the first fireproof plate 200 is provided with a storage groove 215. The inner top of the storage groove 215 is rotatably connected to the second fireproof plate 201 by a torsion spring. The second fireproof plate 201 can rotate outward under the action of the torsion spring. In this embodiment, by setting the second fireproof plate 201, when the battery pack assembly 101 catches fire, the first fireproof plate 200 rotates and unfolds, and the second fireproof plate 201 also unfolds by the rotational force of the torsion spring, forming a Y-shaped structure with a triangular space inside. Through the double fire protection of the first fireproof plate 200 and the second fireproof plate 201, the surface temperature of the first fireproof plate 200 can be reduced, preventing people in the vehicle from being burned when getting out of the vehicle.

[0026] The different fire environments of the battery pack assembly 101 can easily lead to the bottoms of the first fireproof plate 200 and the second fireproof plate 201 not being able to fully contact the ground. In order to enable the first fireproof plate 200 and the second fireproof plate 201 to cope with different road conditions, the specific structure can be as follows: Figure 5 as well as Figure 6In the embodiment shown, the first fireproof board 200 includes a first plate 203, a second plate 204, and a first insert plate 205. The first insert plate 205 is fixedly connected to the upper end of the second plate 204. The first insert plate 205 is inserted into the bottom of the first plate 203 and can slide. An elastic component is provided between the first insert plate 205 and the first plate 203, which causes the second plate 204 to extend outward. The second fireproof board 201 includes a third plate 206, a fourth plate 207, and a second insert plate 208. The second insert plate 208 is fixedly connected to the bottom of the third plate 206. The second insert plate 208 is inserted into and can slide with the fourth plate 207. An elastic component is provided between the second insert plate 208 and the fourth plate 207. This elastic component allows the fourth plate 207 to extend outward. The receiving groove 215 is provided on the outer wall of the second plate 204 near the third plate 206. In this embodiment, by providing the elastic component, the second plate 204 and the fourth plate 207 can extend outward when the first fireproof plate 200 is opened, so that they can adapt to the potholes on the road surface and extend accordingly. This ensures that the bottom of the second plate 204 and the fourth plate 207 can contact the ground under any road conditions, resulting in better fireproof performance.

[0027] Since the road surface cannot always remain level, gaps will form between the second and fourth panels 204 and the ground when there are potholes or irregular bumps. Flames may then escape from these gaps, potentially injuring occupants of the vehicle. To improve the sealing between the second and fourth panels 204 and the ground, a specific structure can be adopted as follows: Figure 4 as well as Figure 5 In the embodiment shown, a rotating roller 216 is rotatably connected to the inner bottom of the storage groove 215 via a torsion spring. One end of a fireproof cloth 202 is fixedly connected to the outer wall of the rotating roller 216, and the other end of the fireproof cloth 202 is fixedly connected to the outer wall of the fourth plate 207. The fireproof cloth 202 is normally rolled up on the rotating roller 216, and a counterweight 217 is fixedly connected to the surface of the fireproof cloth 202. The rotational force of the torsion spring on the second fireproof plate 201 is greater than the rotational force of the torsion spring on the rotating roller 216. In this embodiment, the fireproof cloth 202 is automatically rolled up when the second fireproof plate 201 is stored inside the storage groove 215. When the second fireproof plate 201 is unfolded outward, the fireproof cloth 202 is also unfolded. The counterweight 217 can make the fireproof cloth 202 stick to the ground, thereby reducing the flames from spraying outward through the gaps.

[0028] When the battery pack assembly 101 catches fire, firefighters need to use fire extinguishers or water hoses to approach the vehicle assembly 100 to extinguish the fire. However, the battery pack assembly 101 is located at the bottom of the vehicle assembly 100, making it impossible for the extinguishing agent to completely cover the burning part. Firefighters must approach the vehicle assembly 100; if an explosion occurs, it could injure the firefighters. To avoid this, the specific structure can be designed as follows: Figure 5 as well as Figure 6 In the illustrated embodiment, the second connector plate 208 has multiple nozzles 209 near the outer wall of the battery pack assembly 101. A fire extinguishing device interface 210 is provided on one side of the outer wall of the third plate 206, passing through the second plate 204. A channel is provided inside the third plate 206, connecting the channel to the fire extinguishing device interface 210 and each nozzle 209. In this embodiment, during fire extinguishing, firefighters connect the fire extinguishing device to the fire extinguishing device interface 210. The extinguishing medium enters the channel through the fire extinguishing device interface 210 and is then sprayed outwards from each nozzle 209. Since the second fireproof plate 201 is tilted when unfolded outwards, each nozzle 209 is aligned with the battery pack assembly 101, allowing the extinguishing medium to directly contact the battery pack assembly 101 upon spraying, making fire extinguishing more convenient. Furthermore, after connecting the fire extinguishing device to the fire extinguishing device interface 210, personnel can move away from the vehicle assembly 100, preventing injury from an explosion of the battery pack assembly 101.

[0029] Because the fire extinguishing device interface 210 is located on one side of the third plate 206, it is easily damaged by flames during connection. To change the connection position, the specific structure can be as follows: Figure 7 In the embodiment shown, an extension tube 211 is detachably connected to the fire extinguishing device interface 210, and a connector 214 is fixedly connected to the end of the extension tube 211. An inner groove 212 is provided on the outer wall of the second plate 204, and the extension tube 211 and the connector 214 are inserted into the inner groove 212. In this embodiment, the extension tube 211 is provided so that the connection position is located at the center of the first fireproof plate 200, so that the fire extinguishing device will not be damaged by flames when connected.

[0030] The specific structure of the automatic control component 300 can be as follows: Figure 3 as well as Figure 8In the embodiment shown, the automatic control component 300 includes a wire rope 301, a guide wheel 302, a take-up roller 303, a transmission rod 304, and a dual-axis motor 305. Both sides of the mounting grooves 104 have mounting slots 103, and each mounting slot 103 is rotatably connected to a guide wheel 302. A wire rope 301 is fixedly connected to the outer wall of each second plate 204. The wire rope 301 fits against the outer wall of the guide wheel 302 and is wound around the outer wall of the take-up roller 303. The take-up roller 303 is located inside the vehicle assembly 100. A transmission rod 304 is detachably connected between two take-up rollers 303 on the same side for transmission. The two rotating ends of the dual-axis motor 305 are detachably connected to the rod 304. The dual-axis motor 305 is installed inside the vehicle assembly 100. In this embodiment, the dual-axis motor 305 drives the transmission rod 304 to rotate, which in turn causes the winding roller 303 to extend the wire rope 301, thereby enabling the first fireproof plate 200 and the second fireproof plate 201 to unfold. During winding, the wire rope 301 causes the second plate 204 and the first plate 203 to contract and rotate toward the inside of the mounting groove 104. After the second fireproof plate 201 contacts the inner wall of the mounting groove 103, it will be pressed into the storage groove 215, thereby completing the winding.

[0031] In the event of a fire, the electrical system of the vehicle assembly 100 may be damaged, and the automatic control component 300 may fail to automatically open the first fireproof panel 200. To ensure that the first fireproof panel 200 can be deployed in the event of a power outage, the specific structure can be as follows: Figure 8 as well as Figure 9 In the embodiment shown, a manual control assembly 400 is installed on the transmission rod 304. The manual control assembly 400 includes a first engagement disc 401, a second engagement disc 402, a pull-out steel cable 403, a return spring 404, a blocking block 405, and a rotating ring 406. The transmission rod 304 is divided into two sections. The first engagement disc 401 is detachably connected to the end of one section, and the second engagement disc 402 is slidably connected to the outer wall of the other section. The blocking block 405 is fixedly connected to the outer wall of the other section of the transmission rod 304. A return spring 404 is sleeved on the outer wall of the transmission rod 304 between the blocking block 405 and the second engagement disc 402. The first engagement disc 401 and the second engagement disc 402 are connected to each other. The second engagement disc 402 is rotatably connected to the outer wall of the second engagement disc 402, and a pull-out steel rope 403 is detachably connected to the pull-out steel rope 403. Multiple pull-out steel ropes 403 converge into the cabin of the vehicle assembly 100 and are provided with a pull-out handle. In this embodiment, when the automatic control component 300 is de-energized and cannot be used, by pulling out the handle, each second engagement disc 402 slides on the outer wall of the transmission rod 304 and compresses the return spring 404, thereby disengaging the first engagement disc 401 from the second engagement disc 402. The first fireproof plate 200 unfolds outward by gravity, thereby enabling the first fireproof plate 200 to be opened in the event of a power outage.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A flame guiding device for an electric vehicle power battery, characterized in that: Includes mounting side plates (102) installed on both sides of the vehicle assembly (100), the bottom of the vehicle assembly (100) is provided with a battery pack assembly (101), the mounting side plates (102) on both sides are provided with mounting grooves (104), and the interior of each mounting groove (104) is rotatably connected with a first fireproof plate (200). The vehicle assembly (100) is equipped with an automatic control component (300). The automatic control component (300) can control the rotation of the first fireproof plate (200). The outer wall of the first fireproof plate (200) is provided with a storage groove (215). The top of the inner side of the storage groove (215) is rotatably connected to the second fireproof plate (201) through a torsion spring. The second fireproof plate (201) can rotate outward under the action of the torsion spring. When the first fireproof plate (200) is rotated and unfolded, the second fireproof plate (201) can unfold under the rotational force of the torsion spring, forming a Y-shaped structure with a triangular space between it and the first fireproof plate (200).

2. The electric vehicle power battery flame guiding device according to claim 1, characterized in that: The first fireproof board (200) includes a first plate (203), a second plate (204), and a first plug plate (205). The first plate (203) is rotatably connected to the mounting groove (104). The first plug plate (205) is fixedly connected to the upper end of the second plate (204). The first plug plate (205) is inserted into the bottom of the first plate (203) and can slide. An elastic component is provided between the first plug plate (205) and the first plate (203). The elastic component allows the second plate (204) and the first plug plate (205) to slide outward relative to the first plate (203).

3. The electric vehicle power battery flame guiding device according to claim 2, characterized in that: The second fireproof board (201) includes a third board (206), a fourth board (207), and a second plug-in plate (208). The storage groove (215) is disposed on the outer wall of the second board (204). The third board (206) is rotatably connected to the storage groove (215). The second plug-in plate (208) is fixedly connected to the bottom of the third board (206). The second plug-in plate (208) is plugged into the fourth board (207) and can slide. An elastic component is provided between the second plug-in plate (208) and the fourth board (207). The elastic component allows the fourth board (207) to slide outward relative to the second plug-in plate (208).

4. The electric vehicle power battery flame guiding device according to claim 3, characterized in that: The inner bottom of the storage groove (215) is rotatably connected to a rotating roller (216) via a torsion spring. One end of the rotating roller (216) is fixedly connected to the fireproof fabric (202), and the other end of the fireproof fabric (202) is fixedly connected to the outer wall of the fourth plate (207). The fireproof fabric (202) is normally rolled up on the rotating roller (216). The rotational force of the torsion spring on the second fireproof plate (201) is greater than the rotational force of the torsion spring on the rotating roller (216). When the second fireproof plate (201) unfolds outward, the fireproof fabric (202) is unfolded.

5. The electric vehicle power battery flame guiding device according to claim 3, characterized in that: The second plug plate (208) is provided with multiple nozzles (209) near the outer wall of the battery pack assembly (101). The outer wall of one side of the third plate (206) is provided with a fire extinguishing device interface (210). The fire extinguishing device interface (210) passes through the second plate (204). The interior of the third plate (206) is provided with a channel that communicates with the fire extinguishing device interface (210) and each nozzle (209).

6. The electric vehicle power battery flame guiding device according to claim 5, characterized in that: An extension tube (211) is detachably connected to the fire extinguishing device interface (210). A connector (214) is fixedly connected to the end of the extension tube (211). An embedded groove (212) is provided on the outer wall of the second plate (204). The extension tube (211) and the connector (214) are inserted into the embedded groove (212).

7. The electric vehicle power battery flame guiding device according to claim 2, characterized in that: The automatic control component (300) includes a wire rope (301), a guide wheel (302), a take-up roller (303), a transmission rod (304), and a dual-axis motor (305). Assembly slots (103) are provided on both sides of the mounting grooves (104). A guide wheel (302) is rotatably connected inside each assembly slot (103). A wire rope (301) is fixedly connected to the outer wall of each of the second plates (204). The wire rope (301) fits against the outer wall of the guide wheel (302) and is wound around the outer wall of the take-up roller (303). The take-up roller (303) is located inside the vehicle assembly (100). A transmission rod (304) is detachably connected between the two take-up rollers (303) on the same side. The two transmission rods (304) are detachably connected to the rotating ends on both sides of the dual-axis motor (305). The dual-axis motor (305) is installed inside the vehicle assembly (100). The rotation of the dual-axis motor (305) can drive the transmission rod (304) to rotate, thereby enabling the take-up roller (303) to extend the wire rope (301) and cause the first fireproof plate (200) to unfold outward.

8. The flame guiding device for an electric vehicle power battery according to claim 7, characterized in that: A manual control assembly (400) is installed on the transmission rod (304), which is used to cause the first fireproof plate (200) to unfold outward when the vehicle assembly (100) is powered off.

9. A flame guiding device for an electric vehicle power battery according to claim 8, characterized in that: The manual control assembly (400) includes a first engagement disc (401), a second engagement disc (402), a pull-out steel cable (403), a return spring (404), a blocking block (405), and a rotating ring (406). The transmission rod (304) is divided into two sections. The first engagement disc (401) is detachably connected to the end of one section, and the second engagement disc (402) is slidably connected to the outer wall of the other section. The blocking block (405) is fixedly connected to the outer wall of the other section of the transmission rod (304). A return spring (404) is sleeved on the outer wall of the transmission rod (304) between the blocking block (405) and the second engagement disc (402). The first mating disc (401) and the second mating disc (402) are mated together. The outer wall of the second mating disc (402) is rotatably connected to a rotating ring (406). A pull-out steel rope (403) is detachably connected to the rotating ring (406). The multiple pull-out steel ropes (403) converge into the cabin of the vehicle assembly (100) and are provided with a pull-out handle. By pulling out the handle, each second mating disc (402) can slide on the outer wall of the transmission rod (304) and compress the return spring (404), thereby disengaging the first mating disc (401) from the second mating disc (402) and causing the first fireproof plate (200) to unfold outward by gravity.

10. A flame guiding device for an electric vehicle power battery according to claim 4, characterized in that: The surface of the fireproof fabric (202) is fixedly connected with a counterweight (217).

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