Vehicle-mounted power battery emergency water injection fire extinguishing device

Abstract

The utility model relates to a kind of vehicle-mounted power battery emergency water injection fire extinguishing device, including mobile chassis, sealed tray tray mouth is upwards and is set on mobile chassis, lifting mechanism drives sealed tray vertical lifting, and the tray mouth of sealed tray is in abutment with the hollow sealed cavity formed by vehicle-mounted power battery package outer wall, cutting cutter head is set in sealed tray chamber, rotary mechanism drives cutting cutter head rotation and implements to vehicle-mounted power battery package outer wall bottom plate cutting, water injection unit is communicated with external high-pressure water source, and for to sealed tray inside inner soaking water source, the device is moved to the thermal runaway electric vehicle battery package below, high-pressure water source is connected to water injection unit, lifting mechanism makes sealed tray extend and realize relative sealing between vehicle bottom battery package bottom plate, rotary cutter head cuts hole in battery package bottom, high-pressure water is injected into sealed tray by water injection unit, high-pressure water enters battery package inside by cutting after hole and realizes the purpose of battery package cooling by simulation water immersion method.

Description

Technical Field

[0001] This utility model relates to the field of emergency rescue equipment technology for new energy vehicles, and in particular to an emergency water injection and fire extinguishing device for vehicle-mounted power batteries. Background Technology

[0002] Thermal runaway in vehicle-mounted power battery packs (mainly lithium-ion batteries) is a frequent occurrence. Extinguishing lithium-ion battery pack fires is a complex and challenging task. The core difficulty lies in the long duration (potentially several hours) of the chain-like exothermic reaction inside the battery, its susceptibility to reignition, and the release of large amounts of toxic gases (such as carbon monoxide, hydrogen fluoride, and hydrogen cyanide). Therefore, fire suppression must focus on "cooling down, terminating the internal reaction, inhibiting reignition, and controlling the spread."

[0003] Extinguishing a vehicle's thermal runaway battery fire involves more than just extinguishing the flames. It requires three core methods: cooling, inhibiting the reaction, and isolation / protection. These methods aim to interrupt the continuous heat release process inside the battery and prevent the fire from spreading and reigniting. Common cooling and extinguishing methods include high-pressure fine water mist cooling, continuous water spraying, and water immersion. Water immersion involves submerging the thermally runaway battery pack in a pool of water. This isolates the battery pack from air, extinguishing the flames, cooling the battery pack by reducing its temperature, and dissolving toxic gases released by the battery. Furthermore, the water's contact with the internal electrodes creates an electrochemical reaction that accelerates the battery's discharge, reducing internal energy and the chemical reaction energy, ultimately achieving isolation and fire extinguishing. When existing vehicle-mounted power battery packs experience thermal runaway, ordinary vehicle-mounted fire extinguishers cannot effectively control the situation, requiring professional firefighting by firefighters. However, existing fire trucks typically use high-pressure fine water mist cooling to control thermal runaway vehicle-mounted power battery packs, which limits their actual ability to handle emergencies. Utility Model Content

[0004] The purpose of this utility model is to provide an emergency water injection and fire extinguishing device for vehicle power batteries, which can effectively control the vehicle power battery pack, simulate the immersion method in a water pool, fully immerse the thermal runaway battery, and improve the ability to control the emergency.

[0005] The technical solution adopted in this utility model is as follows: An emergency water injection and fire extinguishing device for vehicle power batteries, comprising: Mobile chassis; A sealing tray with its opening facing upwards is mounted on the mobile chassis. A lifting mechanism drives the sealing tray to rise and fall vertically, and the opening of the sealing tray abuts against the outer wall of the vehicle power battery pack to form a sealed cavity. A cutting disc is disposed in the cavity of the sealed tray, and a rotating mechanism drives the cutting disc to rotate and perform rotational cutting on the outer wall of the vehicle power battery pack; The water injection unit is connected to an external high-pressure water source and is used to inject soaking water into the sealed tray.

[0006] This utility model also has the following technical features: In one embodiment of this utility model, a pusher is also provided on the mobile chassis, which is used to push the mobile chassis to move on the ground.

[0007] In one embodiment of this utility model, the water injection form includes a central pipeline and a control valve. Both the central pipeline and the control valve are installed on the push frame. One end of the central pipeline is provided with an interface for connecting to an external high-pressure water source. The control valve is used to control the cut-off and opening of the central pipeline.

[0008] In one embodiment of this utility model, the push frame is arranged at an angle, and a roller is provided at the lower end of the push frame. Pressing the push frame causes the movable chassis to tilt up and separate from the ground.

[0009] In one embodiment of this utility model, the cutting disc is generally cylindrical and is vertically rotatably positioned at the bottom center of the sealing tray.

[0010] In one embodiment of this utility model, the rotating mechanism includes a rotating hydraulic motor, which is connected to the lower end of the cutting disc. The rotating hydraulic motor is mounted on a hydraulic lifting rod, which is vertical and fixed to the bottom of the sealing tray.

[0011] In one embodiment of this utility model, the end face of the cutting disc is provided with at least three sets of cutting edge rings, and the three sets of cutting edge rings have different diameters.

[0012] In one embodiment of this utility model, the lifting mechanism includes a lifting hydraulic cylinder, which is vertical and fixed on the movable chassis, and a return spring is provided between the bottom of the sealing tray and the bottom of the movable chassis.

[0013] In one embodiment of this utility model, a sealing rubber ring is provided on the edge of the opening of the sealing tray, and the sealing rubber ring abuts against the outer wall of the vehicle power battery pack.

[0014] Compared with existing technologies, the beneficial effects of this utility model are as follows: This device is placed under the battery pack of an electric vehicle experiencing thermal runaway. It is connected to the water injection unit via an external high-pressure water source (such as a fire truck or water truck). By operating the lifting mechanism, the sealing tray extends out and seals the bottom plate of the battery pack. The rotating mechanism drives the cutting disc to rotate at high speed to cut and open the bottom of the battery pack. At the same time, the water injection unit injects water into the sealing tray to submerge the cutting disc, thereby cooling the cutting disc during the cutting process. After the cutting disc cuts and opens the bottom plate of the battery pack, high-pressure water is injected into the sealing tray through the water injection unit. The high-pressure water enters the hole opened in the aforementioned steps through the sealed cavity formed by the sealing tray and the bottom plate of the battery pack, thus achieving the purpose of cooling and extinguishing the battery pack by simulating water immersion. Attached Figure Description

[0015] Figure 1 and Figure 2 These are schematic diagrams of the vehicle-mounted power battery emergency water injection and fire extinguishing device from two different perspectives in one embodiment of this utility model. Figure 3 This is a schematic diagram of the vehicle-mounted power battery emergency water injection and fire extinguishing device in use in one embodiment of the present invention; Figure 4 This is a cross-sectional view of an emergency water injection and fire extinguishing device for vehicle-mounted power batteries in one embodiment of the present invention; Figure 5 This is a schematic diagram of the handle structure in one embodiment of the present invention. Detailed Implementation

[0016] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0017] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0018] The instruction manual indicates that common fire extinguishing and cooling methods for thermal runaway in vehicle-mounted power battery packs include high-pressure fine water mist cooling, continuous water spraying, and water tank immersion. Among these, water tank immersion is the most effective. In this method, the thermally runaway battery pack is submerged in a pool filled with clean water. By isolating the battery pack from air, the flames are extinguished. The water cools the battery pack, reducing its temperature and dissolving toxic gases released. Simultaneously, the water's contact with the internal electrodes creates an electrochemical reaction, accelerating the battery pack's discharge and reducing internal energy, thus lowering the chemical reaction energy and ultimately achieving isolation and fire extinguishing. Currently, when a vehicle-mounted power battery pack experiences thermal runaway, ordinary vehicle-mounted fire extinguishers are insufficient, requiring professional firefighting by firefighters. However, existing fire trucks typically use high-pressure fine water mist cooling to control thermally runaway battery packs, limiting their actual ability to handle such emergencies. To address this issue, this utility model proposes an emergency water injection and fire extinguishing device for vehicle-mounted power batteries, comprising a mobile chassis 10; a sealing tray 20, with its opening facing upwards and mounted on the mobile chassis 10, wherein a lifting mechanism drives the sealing tray 20 to rise and fall vertically, and the opening of the sealing tray 20 abuts against the outer wall of the vehicle-mounted power battery pack to form a seal; a cutting disc 30, disposed within the cavity of the sealing tray 20, wherein a rotating mechanism drives the cutting disc 30 to rotate and perform rotational cutting on the outer wall of the vehicle-mounted power battery pack; and a water injection unit, connected to an external high-pressure water source, for injecting soaking water into the sealing tray 20.

[0019] During the rotation of the aforementioned cutting disc 30 via the rotating mechanism, it can cut the outer wall of the vehicle power battery pack, creating a hole in the outer wall. After the opening of the sealing tray 20 comes into contact with the outer wall of the vehicle power battery pack, water is introduced into the sealing tray 20 through the water injection unit. The water enters the cut hole in the outer wall of the vehicle power battery pack, immersing the inside of the vehicle power battery pack to achieve the purpose of cooling and extinguishing the fire by simulating water immersion. After the opening of the sealing tray 20 comes into contact with the vehicle power battery pack, a basin-shaped water storage space is formed to submerge the cutting disc 30, thereby cooling the cutting disc 30 during the cutting process and forming a sealing flange interface for injecting water into the hole after cutting.

[0020] In the above embodiments, the cutting disc 30 is also immersed inside the sealed tray 20, which can also achieve cooling of the cutting disc 30.

[0021] See Figure 3This fire extinguishing device can be used inside fire trucks. When a fire is reported involving a new energy vehicle, the device can be deployed directly to the scene. The water injection unit is connected to the high-pressure water source of the fire truck. The device is pushed to the underside of the new energy vehicle's chassis, and the lifting mechanism is activated to vertically raise and lower the sealing tray 20. The opening of the sealing tray 20 is then pressed against the bottom outer wall of the vehicle's power battery pack to form a seal. The cutting disc 30 is then activated to rotate, creating a hole in the outer wall of the vehicle's power battery pack. Water is then introduced into the hole by activating the water injection unit to simulate water immersion for cooling and fire extinguishing purposes.

[0022] In one embodiment, to facilitate the transfer and pushing of the fire extinguishing device, a pusher 40 is also provided on the mobile chassis 10, which is used to push the mobile chassis 10 to move on the ground.

[0023] The aforementioned pusher 40 can be configured as a standard pusher, capable of moving the movable chassis 10 on the ground.

[0024] In one embodiment, the water injection form includes a central pipeline 51 and a control valve 52. Both the central pipeline 51 and the control valve 52 are installed on the push frame 40. One end of the central pipeline 51 is provided with an interface 511 that connects to an external high-pressure water source. The control valve 52 is used to control the cut-off and opening of the central pipeline 51.

[0025] In one embodiment, the control valve 52 is mounted on the pusher 40. The control valve 52 is equipped with a switch that can control the valve to close and open. The switch can be a mechanical switch. When the interface 511 at one end of the central pipeline 51 is connected to the high-pressure water source of the fire truck, the outlet of the control valve 52 is opened or closed by operating the switch, so that the high-pressure water source is introduced into the sealed tray 20, thereby implementing the simulated water immersion method to cool down and extinguish the fire in the battery pack.

[0026] In one embodiment, the pusher 40 is arranged at an angle, and a roller 41 is provided at the lower end of the pusher 40. Pressing the pusher 40 causes the movable chassis 10 to tilt up and separate from the ground.

[0027] In one embodiment, see Figure 4 One end of the push frame 40 is hinged to the movable chassis 10. A latch is provided on the hinge shaft. The latch is connected to the unlocking handle at the high end of the push frame 40 via a pull rope. (See reference...) Figure 4 The rotating arrow at the top center allows for adjustment of the connection angle between one end of the hand-pushing frame 40 and the movable chassis 10 via the unlocking handle.

[0028] In actual use, when the fire extinguishing device needs to be moved, pressing the push handle 40 causes the movable base 10 to lift and separate from the ground. (See reference...) Figure 4 The lower rotating arrow indicates that the pusher 40 is similar to a seesaw, allowing the entire device to be pressed onto the rollers 41 for easy transfer. Once transferred to the designated location, the pusher 40 is released to allow the mobile chassis 10 to touch the ground, facilitating fire extinguishing operations. After the fire extinguishing operation is completed, the fire extinguishing device is transferred in the same manner.

[0029] In one embodiment, in order to perform the opening operation on the outer wall of the vehicle power battery pack, the cutting disc 30 is generally cylindrical, and the cutting disc 30 is vertically rotatably disposed at the bottom center of the sealing tray 20.

[0030] During the startup of the aforementioned rotating mechanism, the cutting disc 30 can rotate at high speed, enabling the opening operation on the outer wall of the vehicle power battery pack.

[0031] In one embodiment, see Figure 4 The rotating mechanism includes a rotary hydraulic motor 31, which is connected to the lower end of the cutting disc 30. The rotary hydraulic motor 31 is mounted on a hydraulic lifting rod 32, which is vertical and fixed to the bottom of the sealing tray 20.

[0032] In the above embodiment, after the fire extinguishing device is pushed to a position below the chassis of the new energy vehicle, the hydraulic lifting rod 32 is activated, causing the upper end of the cutting disc 30 to contact the outer wall of the vehicle's power battery pack. The rotating hydraulic motor 31 is then activated to perform a cutting operation on the outer wall of the vehicle's power battery pack, creating a water-immersed hole to allow water to enter the battery and simulate a immersion method for fire extinguishing. A vertical guide rod and a vertical return spring can be installed between the cutting disc 30 and the hydraulic lifting rod 32. The vertical return spring retracts the hydraulic lifting rod 32 to reset the cutting disc 30, and the vertical guide rod provides vertical guidance for the cutting disc 30.

[0033] In one embodiment, to ensure the effectiveness of cutting the outer wall of the vehicle power battery pack, the end face of the cutting disc 30 is provided with at least three sets of cutting edge rings, and the three sets of cutting edge rings have different diameters.

[0034] The above-mentioned at least three sets of cutting edge rings have different diameters. By activating the hydraulic motor 31, the reliability of cutting the outer wall of the vehicle power battery pack can be ensured.

[0035] In one embodiment, the lifting mechanism includes a lifting hydraulic cylinder 11, which is vertical and fixed on the movable chassis 10. A return spring 12 is provided between the piston rod end of the lifting hydraulic cylinder 11 and the bottom of the sealing tray 20.

[0036] When a fire extinguishing operation is carried out, the fire extinguishing device is pushed to the position below the vehicle power battery, and the lifting hydraulic cylinder 11 is activated, causing the sealing tray 20 to rise and abut against the outer wall of the vehicle power battery, so that a sealed cavity is formed between the sealing tray 20 and the vehicle power battery. After the outer wall of the vehicle power battery pack is cut open, the control valve 52 is activated, and high-pressure fire extinguishing water is introduced into the sealed cavity through the central pipeline 51, so that the entire vehicle power battery is immersed in fire extinguishing water, thereby simulating the immersion method of fire extinguishing. The return spring 12 assists in the return of the lifting hydraulic cylinder 11 on the sealing tray 20 after the high-pressure water source is cut off after the rescue. The lifting hydraulic cylinder 11 is vertical and fixed between the mobile chassis 10, and a guide rod can also be set to implement vertical guidance of the sealing tray 20.

[0037] In one embodiment, to ensure the sealing reliability of the sealing tray 20 and the vehicle power battery, a sealing rubber ring 21 is provided on the edge of the opening of the sealing tray 20, and the sealing rubber ring 21 abuts against the outer wall of the vehicle power battery pack.

[0038] In one embodiment, the lifting hydraulic cylinder 11, the rotary hydraulic motor 31, and the hydraulic lifting rod 32 are all hydraulic devices. All three are connected to a control valve 52 via pipelines. The control valve 52 is a three-position two-way valve, equipped with an adjustment switch. This switch can be a push-button or rotary switch. By switching the switch, the high-pressure water source and return water pipeline are connected to the inlet and outlet of the lifting hydraulic cylinder 11, the rotary hydraulic motor 31, and the hydraulic lifting rod 32, respectively, thereby controlling the start, stop, and pressure release of these components. Once the danger to the vehicle's power battery is eliminated, the lifting hydraulic cylinder 11 and the hydraulic lifting rod 32 are depressurized and reset, the sealing tray 20 descends, and the entire device is then pulled out from under the new energy vehicle. The water in the sealing tray 20 can then be emptied.

[0039] In another embodiment, the lifting hydraulic cylinder 11, the rotary hydraulic motor 31, and the hydraulic lifting rod 32 are all hydraulic devices, which are specially designed with hydraulic valves for control. The hydraulic valves are connected to the high-pressure pump on the fire truck. High-pressure water can be provided by starting the high-pressure pump on the fire truck to realize the operation of the lifting hydraulic cylinder 11, the rotary hydraulic motor 31, and the hydraulic lifting rod 32.

[0040] Specifically, in one embodiment, see [reference] Figure 1The central pipeline 51 is equipped with four sets of control valves 52, each with a connecting pipe. The connecting pipes have interfaces 511 for connecting to the high-pressure water source of the fire truck. The high-pressure water source connects to the lifting hydraulic cylinder 11, the rotary hydraulic motor 31, and the hydraulic lifting rod 32 via the control valves 52 and the four sets of central pipelines 51, respectively. A handle 42 is provided on the push frame 40, with a first rotary switch 421 and a second rotary switch 422 at each end. After the interface 511 connecting to the high-pressure water source of the fire truck is connected, turning the first rotary switch 421 allows water to be injected into the sealed cavity formed by the central pipeline 51 and the sealing element into the battery pack after the opening. (See reference...) Figure 5 Rotating the second rotary switch 422 to position 2 extends the lifting hydraulic cylinder 11, allowing the sealing tray 20 to form a sealed connection with the vehicle's power battery. Turning the first rotary switch 421 to position 1 injects high-pressure water into the sealing tray 20 through the central pipe 51. Turning the first rotary switch 421 to position 2 extends the hydraulic lifting rod 32. Turning the second rotary switch 422 to position 1 starts the rotating hydraulic motor 31, which rotates at high speed to rotate the outer wall of the vehicle's power battery pack. During the cutting process, the first rotary switch 421 is intermittently adjusted between positions 1 and 2 to replenish the high-pressure water stored in the sealing tray 20 for cooling the cutting disc 30, and to adjust the connection between the cutting disc 30 and the vehicle's power battery. The cutting depth of the outer wall of the power battery pack is as follows: After a hole is cut in the outer wall of the vehicle power battery pack; turn the first knob switch 421 to position 3, so that the hydraulic lifting rod 32 cuts off the high-pressure water source to the pressure relief hole through the central pipe 51 and the knob switch 421 to release pressure, and the rotary hydraulic motor 31 and the cutting blade 30 return to their original positions with the help of the return spring; turn the second knob switch 422 to position 2 to turn off the rotary hydraulic motor 31 and turn on the lifting hydraulic cylinder 11 to maintain the sealed tray 20 and the vehicle power battery in a sealed state, and continuously introduce high-pressure fire extinguishing water into the vehicle power battery compartment through the cutting hole, so that the entire vehicle power battery is immersed in fire extinguishing water, thereby simulating the immersion method of fire extinguishing.

[0041] Once the danger to the vehicle's power battery has been eliminated, turn the second rotary switch 422 to position 3 to cut off the high-pressure water supply to the lifting hydraulic cylinder 11. This allows the lifting hydraulic cylinder 11 to release pressure through the central pipeline 51 and the rotary switch 422, which cut off the high-pressure water supply to the pressure relief hole. The return spring then helps the sealing tray 20 to descend, allowing the entire device to be pulled out from under the new energy vehicle. Finally, the water in the sealing tray 20 can be emptied.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An emergency water injection and fire extinguishing device for vehicle-mounted power batteries, characterized in that: include Mobile chassis (10); A sealing tray (20) with its opening facing upwards is mounted on the mobile chassis (10). The lifting mechanism drives the sealing tray (20) to rise and fall vertically, and the opening of the sealing tray (20) abuts against the outer wall of the vehicle power battery pack to form a sealed hollow cavity. A cutting disc (30) is disposed in the cavity of the sealed tray (20). The rotating mechanism drives the cutting disc (30) to rotate and perform rotational cutting on the outer wall of the vehicle power battery pack. The water injection unit is connected to an external high-pressure water source and is used to inject soaking water into the sealed tray (20).

2. The vehicle-mounted power battery emergency water injection fire extinguishing device according to claim 1, characterized in that: The mobile chassis (10) is also provided with a pusher (40), which is used to push the mobile chassis (10) to move on the ground.

3. The vehicle-mounted power battery emergency water injection fire extinguishing device according to claim 2, characterized in that: The water injection unit includes a central pipeline (51) and a control valve (52). Both the central pipeline (51) and the control valve (52) are installed on the push frame (40). One end of the central pipeline (51) is provided with an interface (511) that connects to an external high-pressure water source. The control valve (52) is used to control the cut-off and opening of the central pipeline (51).

4. The vehicle-mounted power battery emergency water injection fire extinguishing device according to claim 2, characterized in that: The pusher (40) is arranged at an angle, and a roller (41) is provided at the lower end of the pusher (40). Pressing the pusher (40) causes the movable chassis (10) to lift up and separate from the ground.

5. The vehicle-mounted power battery emergency water injection fire extinguishing device according to claim 1, characterized in that: The cutting disc (30) is in the shape of a cylindrical tube and is vertically rotatably positioned at the bottom center of the sealing tray (20).

6. The vehicle-mounted power battery emergency water injection fire extinguishing device according to claim 5, characterized in that: The rotating mechanism includes a rotary hydraulic motor (31), which is connected to the lower end of the cutting disc (30). The rotary hydraulic motor (31) is mounted on a hydraulic lifting rod (32), which is vertical and fixed to the bottom of the sealing tray (20).

7. The vehicle-mounted power battery emergency water injection fire extinguishing device according to claim 5, characterized in that: The end face of the cutting disc (30) is provided with at least three sets of cutting edge rings, and the diameters of the three sets of cutting edge rings are different.

8. The vehicle-mounted power battery emergency water injection fire extinguishing device according to claim 1, characterized in that: The lifting mechanism includes a lifting hydraulic cylinder (11), which is vertical and fixed on the mobile chassis (10). A return spring (12) is provided between the bottom of the sealing tray (20) and the bottom of the mobile chassis (10).

9. The vehicle-mounted power battery emergency water injection fire extinguishing device according to claim 8, characterized in that: The sealing tray (20) has a sealing rubber ring (21) on its edge, and the sealing rubber ring (21) abuts against the outer wall of the vehicle power battery pack to form a sealed cavity.

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