Puncture fire extinguishing device for power battery of new energy automobile

Abstract

The invention discloses a new energy automobile power battery puncture fire extinguishing device, and relates to the technical field of fire fighting equipment, the new energy automobile power battery puncture fire extinguishing device comprises: a walking vehicle body, the middle of which is provided with a mounting cavity with an upper end opening; the lower end of the puncture spray rod is a piston rod matched with the mounting cavity; the back pressure valve is mounted in the puncture spray rod, can cut off an inner cavity of the puncture spray rod, and is opened under the water spray pressure; the water inlet flow channel is used for being connected with a water source and guiding water flow to the lower end of the puncture spray rod. The puncture driving assembly is installed on the walking vehicle body and located at the upper end of the installation cavity and the moving path of the puncture spraying rod, and under the condition that the puncture driving assembly is connected with the puncture spraying rod, the upper end of the puncture spraying rod can be driven to penetrate into the battery pack; and in the state that the lower end of the puncture spray rod moves to the puncture driving assembly, the puncture spray rod can be in transmission connection with the puncture driving assembly and trigger the puncture driving assembly, and the lower end of the puncture spray rod communicates with the water inlet flow channel. The height and the puncture stroke of the puncture device can be considered.

Description

Technical Field

[0001] This invention relates to the field of fire-fighting equipment technology, specifically to a puncture extinguishing device for a new energy vehicle power battery. Background Technology

[0002] To reduce vehicle emissions, pure electric and hybrid vehicles already account for a large proportion of the market, with significant future growth potential. Fires caused by thermal runaway of the power batteries in new energy vehicles are frequent, posing new challenges to firefighting due to their unique characteristics. Specifically, the power battery pack of a new energy vehicle is a sealed assembly consisting of hundreds to thousands of small lithium batteries, along with controllers, etc. (The battery pack is approximately 12 to 20 centimeters thick, and the base plate is typically made of aluminum profiles with a wall thickness of about 2.5 millimeters or iron plates with a thickness of 1.2 to 1.5 millimeters, formed by stamping and welding). Thermal runaway of one lithium battery can lead to thermal runaway of surrounding batteries, resulting in fire, deflagration, or even explosion, which can last for several hours and is prone to reignition.

[0003] The existing fire extinguishing methods for new energy vehicle power batteries include the following:

[0004] 1. Firefighting water spray can cool down and extinguish fires on the vehicle body, but it cannot cool down and extinguish fires inside the battery pack. This method uses about 25,000 liters of water and takes about 5 hours. This method uses a lot of water and takes a long time. The harmful substances in the firefighting wastewater cause great environmental pollution and have a high possibility of secondary accidents, making it unsafe.

[0005] 2. Penetration extinguishing: When using this method, first use a lifting device to raise the vehicle to a height sufficient to place the puncture device. Then, place the puncture device at the corresponding battery pack location. Using compressed gas or hydraulic pressure, push the puncture nozzle to pierce the battery pack casing, forcing part of the nozzle into the battery pack. Extinguishing water is then sprayed into the battery pack at a flow rate of approximately 30 liters per minute through the puncture nozzle to extinguish and cool the battery pack. Under normal use, this method can reduce the amount of water used and the extinguishing time. However, existing puncture extinguishing devices have the following shortcomings:

[0006] (1) The puncture device is tall, and other lifting devices are needed to assist in the use of cars and other vehicles with low chassis. A lifting device is required, and the timeliness of fire extinguishing is poor.

[0007] (2) The puncture nozzle stroke is relatively short (due to the height constraint of the puncture device), limiting the applicable vehicle models;

[0008] (3) When placing the puncture device and assisting in lifting, the operator is close to the vehicle, which is unsafe.

[0009] 3. The vehicle-mounted automatic fire extinguishing device can extinguish fires automatically, but the amount of fire extinguishing agent carried by the vehicle is small and can only deal with a small amount of heat inside the battery pack, which is not enough to meet the fire extinguishing needs of vehicles that are already on fire. Summary of the Invention

[0010] To address the technical problems of short puncture stroke and large puncture device height in existing fire extinguishing devices for new energy vehicles, this invention provides a fire extinguishing device for power batteries of new energy vehicles. The puncture spray bar is sequentially raised and inserted, which can be installed on vehicles with relatively low height and has sufficient puncture stroke to balance the height of the puncture device and the puncture stroke, making the fire extinguishing device applicable to a wide range of vehicle models.

[0011] This invention is achieved through the following technical solution:

[0012] This invention provides a puncture-resistant fire extinguishing device for a new energy vehicle power battery, comprising: a vehicle body capable of moving to the underside of a vehicle chassis, with a mounting cavity having an opening at the top in the middle; a puncture spray bar, installed within the mounting cavity, having a through-hole structure, with a piston rod-shaped lower end adapted to the mounting cavity and a pointed cone-shaped upper end with a spray hole communicating with its own internal cavity; a back pressure valve, installed inside the puncture spray bar, capable of cutting off the internal cavity of the puncture spray bar and opening under water pressure; and a water inlet channel, located on the vehicle body, for connecting to a water source and diverting water... The flow is guided to the gap between the lower end of the puncture spray bar and the bottom of the mounting cavity; the puncture drive assembly, mounted on the vehicle body, is located at the upper end of the mounting cavity and on the movement path of the puncture spray bar. When connected to the puncture spray bar, it can drive the upper end of the puncture spray bar to pierce into the battery pack; wherein, when the lower end of the puncture spray bar moves to the puncture drive assembly, the puncture spray bar can be driven to the puncture drive assembly and trigger the puncture drive assembly, and the lower end of the puncture spray bar is connected to the water inlet channel.

[0013] The present invention provides a puncture-resistant fire extinguishing device for a new energy vehicle power battery, comprising a vehicle body, a puncture spray bar, a back pressure valve, a water inlet channel, and a puncture drive assembly. The vehicle body has an upper-opening mounting cavity in its middle. The puncture spray bar is installed in the mounting cavity, with its lower end shaped like a piston rod. The back pressure valve is installed inside the puncture spray bar. The water inlet channel guides water flow to the lower end of the puncture spray bar. The puncture drive assembly is installed on the vehicle body and drives the upper end of the puncture spray bar to puncture the battery pack. In use, the vehicle body is moved to a position below the burning vehicle power battery pack, and then fire extinguishing water is introduced into the water inlet channel, allowing the water to enter the puncture point. Between the lower end of the spray bar and the bottom of the mounting cavity, due to the back pressure valve installed inside the piercing spray bar, the extinguishing water will not directly enter the piercing spray bar. As the water flow continues to enter, the water pressure in the mounting cavity increases. Since the lower end of the piercing spray bar is piston-shaped and there is no obstruction when the piercing spray bar moves upward, only a small driving force is needed to move it upward. Thus, before the water pressure in the mounting cavity rises to the opening pressure (spray pressure) of the back pressure valve, the piercing spray bar is driven upward by the water pressure in the mounting cavity until the lower end of the piercing spray bar moves to the piercing drive assembly and is connected to the piercing drive assembly, realizing the initial lifting of the piercing spray bar.

[0014] After the lower end of the puncture spray bar moves to the puncture drive assembly and is connected to it, it can limit the puncture spray bar from moving upward under the action of water pressure. At the same time, it triggers the puncture drive assembly to drive the puncture spray bar to continue moving upward and drive the upper end of the puncture spray bar to pierce into the battery pack. Since the lower end of the puncture spray bar is connected to the water inlet channel, the fire extinguishing water is sprayed out through the puncture spray bar. When the spray nozzle sprays water, it can keep the water pressure of the fire extinguishing water above the spray pressure, which can ensure that the back pressure valve is always open in this state, so as to spray water from the power battery pack of the new energy vehicle to extinguish the fire and achieve puncture fire extinguishing.

[0015] Therefore, during the operation of the entire device, the puncture spray bar is first driven to move upward to the outside of the upper part of the vehicle body, and then the puncture drive assembly drives the puncture spray bar to move upward and pierce into the battery pack. This achieves the sequential lifting and piercing of the puncture spray bar, allowing the puncture spray bar to pierce into the battery pack with a relatively small main body size. The length of the puncture spray bar can be reduced and retracted into the vehicle body, achieving a low profile for the entire device. This results in a smaller puncture device height, which can be moved under the chassis without lifting the vehicle, ensuring timely fire extinguishing and simplifying fire extinguishing operations. Furthermore, the puncture spray bar has a two-stage stroke during operation, ensuring that the end of the puncture spray bar can be inserted into the battery pack.

[0016] In summary, the new energy vehicle power battery puncture fire extinguishing device provided by the present invention features a puncture spray bar that sequentially rises and punctures during operation. It can be installed on vehicles with relatively low heights and has sufficient puncture stroke to balance the height of the puncture device and the puncture stroke, thus making the fire extinguishing device applicable to a wide range of vehicle models.

[0017] In an optional embodiment of this application, the back pressure valve includes: a first mounting ring plate, coaxially fixed to the inner cavity of the piercing spray rod and adapted to the inner cavity of the piercing spray rod, with a valve hole in the middle; a second mounting ring plate, fixed to the inner cavity of the piercing spray rod and located above the first mounting ring plate, with a guide hole on its outer periphery; a valve core, disposed between the first mounting ring plate and the second mounting ring plate; and a back pressure spring, with an action force between the valve core and the second mounting ring plate, capable of pressing the valve core against the first mounting ring plate to block the valve hole through the valve core; wherein, when the pressure borne by the valve core reaches a set value, the back pressure spring can be squeezed upward to connect the valve core and the guide hole, ensuring that the back pressure valve can play a back pressure role and conduct when the water pressure in the mounting cavity reaches the spray pressure.

[0018] In an optional embodiment of this application, the lower section of the valve core is spherical, and the outer diameter of the lower end of the valve core is larger than the inner diameter of the valve hole, so that when the valve core leaves the first mounting ring plate, there is sufficient effective flow area between it and the first mounting ring plate to reduce obstruction to the fire extinguishing water.

[0019] In an optional embodiment of this application, the upper section of the valve core is rod-shaped, and the back pressure spring is sleeved outside the upper section of the valve core; a guide hole is provided in the middle of the second mounting ring plate, and the upper section of the valve core slides through the guide hole, so as to ensure that the back pressure spring and the valve core can work reliably through the guidance of the valve core rod section by the second mounting ring plate, and the support and limitation of the valve core rod section on the back pressure spring, thereby avoiding the situation where the valve core deflects and cannot be reset.

[0020] In an optional embodiment of this application, a water inlet slit is provided on one side of the bottom of the mounting cavity, and the water inlet channel communicates with the lower end of the puncture spray rod and the cavity between the bottom of the mounting cavity through the water inlet slit, so as to guide the water flow to the lower end of the puncture spray rod.

[0021] In an optional embodiment of this application, a telescopic corrugated pipe is further provided inside the mounting cavity. The upper end of the telescopic corrugated pipe is fixedly connected to the lower end of the puncture spray rod, and the telescopic corrugated pipe communicates with the inner cavity of the puncture spray rod. The lower end of the telescopic corrugated pipe is fixed to the side wall of the mounting cavity, and the lower end of the telescopic corrugated pipe is located above the water inlet slot, so as to ensure that when the puncture drive assembly moves the puncture spray rod upward, the puncture spray rod can reliably connect with the water inlet channel.

[0022] In an optional embodiment of this application, a drive ring cavity is provided at the upper middle part of the vehicle body, the drive ring cavity is arranged around the upper end of the mounting cavity, and the upper end is open; the puncture drive assembly includes: a transmission ring plate, which covers the drive ring cavity and allows the upper end of the puncture spray rod to pass through in the middle; a connecting ring platform, which is fixed to the lower side of the transmission ring plate and is spaced out from the puncture spray rod; and an explosive device, which is installed in the drive ring cavity; wherein, when the lower end of the puncture spray rod moves into the connecting ring platform and is limited, the connecting ring platform is drivenly connected to the puncture spray rod, and when the connecting ring platform is drivenly connected to the puncture spray rod, the explosive device can be triggered to detonate.

[0023] Therefore, the effective force-bearing area of ​​the transmission ring plate is positively correlated with the cross-sectional area of ​​the drive ring cavity. The drive ring cavity is located outside the upper end of the mounting cavity, and its cross-sectional area is not constrained by its mounting components. It can extend to the upper edge of the vehicle body, allowing the transmission ring plate to output sufficient force. The explosive device is installed in the drive ring cavity. When the connecting ring platform and the piercing spray bar are connected, the explosive device is triggered to explode. The impact (instantaneous high pressure) of the explosive device explosion allows the transmission ring plate to obtain sufficient pressure, thereby driving the piercing spray bar to move upward instantaneously and penetrate the armor of the power battery pack (including the chassis armor) to insert the piercing spray bar into the power battery pack. At this time, the transmission ring plate can play a limiting role to prevent the upper end of the piercing spray bar from protruding from the upper end of the power battery pack, ensuring that the spray hole of the piercing spray bar is located inside the power battery pack.

[0024] In an optional embodiment of this application, a connecting pin hole is provided on the lower end sidewall of the piercing spray rod, and a spring pin is provided on the sidewall of the connecting ring platform; a firing mechanism is adapted to be installed in the drive ring cavity. When the spring pin abuts against the upper sidewall of the piercing spray rod, the spring pin limits the firing mechanism, so that the firing mechanism is in an energy storage state; wherein, when the lower end of the piercing spray rod moves into the connecting ring platform and is limited, the spring pin is inserted into the connecting pin hole and releases the limitation on the firing mechanism, thereby firing the explosive device.

[0025] In an optional embodiment of this application, the firing mechanism includes a firing pin and a firing spring. The firing pin is slidably mounted on the outer side wall of the connecting ring platform, and the firing spring is sleeved on the firing pin. When the spring pin abuts against the upper side wall of the piercing spray bar, the firing pin abuts against the end of the spring pin away from the piercing spray bar, and the spring pin is movable relative to the firing pin along its own length. The explosive device is equipped with a firing primer, which is positioned directly opposite the firing pin and below the spring pin to ensure that the firing mechanism is linked to the spring pin and controlled by the timing of the spring pin.

[0026] In an optional embodiment of this application, the vehicle body is equipped with a track drive assembly, which can drive the vehicle body to move on its own, so as to ensure that the vehicle body can move on its own while having a certain degree of high temperature resistance, and to avoid being damaged by high temperature during firefighting.

[0027] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0028] 1. The new energy vehicle power battery puncture fire extinguishing device provided by the present invention includes a vehicle body, a puncture spray bar, a back pressure valve, a water inlet channel, and a puncture drive assembly. The vehicle body has an installation cavity with an upper opening in the middle. The puncture spray bar is installed in the installation cavity and its lower end is piston rod-shaped. The back pressure valve is installed inside the puncture spray bar. The water inlet channel guides water flow to the lower end of the puncture spray bar. The puncture drive assembly is installed on the vehicle body and can drive the upper end of the puncture spray bar to puncture the battery pack. Before the water pressure in the installation cavity rises to the opening pressure of the back pressure valve... It can drive the puncture spray bar upward to achieve the initial lifting of the puncture spray bar. After the lower end of the puncture spray bar moves to the puncture drive assembly and is connected to it, the puncture drive assembly drives the puncture spray bar to continue to move upward so that the upper end of the puncture spray bar can be inserted into the battery pack to achieve puncture fire extinguishing. It also realizes the sequential lifting and insertion of the puncture spray bar. The length of the puncture spray bar can be reduced and retracted into the vehicle body, so that the height of the puncture device is small. It can be moved under the chassis without lifting the car to ensure the timeliness of fire extinguishing and simplify the fire extinguishing operation.

[0029] 2. The new energy vehicle power battery puncture fire extinguishing device provided by the present invention has a puncture spray bar that rises and punctures in sequence during operation. It can be installed on vehicles with low height and has sufficient puncture stroke to take into account both the height of the puncture device and the puncture stroke, so that the fire extinguishing device has a sufficient range of applications and can be applied to a variety of vehicle models. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] In the attached diagram:

[0032] Figure 1 This is a cross-sectional view of the assembled new energy vehicle power battery puncture extinguishing device provided in an embodiment of the present invention.

[0033] Figure 2 for Figure 1 A magnified structural diagram of part A;

[0034] Figure 3 for Figure 1 Enlarged schematic diagram of part B;

[0035] Figure 4 A schematic diagram of the structure provided in an embodiment of the present invention, showing the lower end of the puncture spray bar confined within the connecting cylinder;

[0036] Figure 5 For this Figure 4 A magnified structural diagram of part C.

[0037] The attached diagram shows the markings and corresponding component names:

[0038] 10-Traveling vehicle body, 11-Mounting cavity, 12-Water inlet channel, 13-Water inlet slot, 14-Telescopic bellows, 15-Drive ring cavity, 16-Track drive assembly, 20-Piercing spray bar, 21-Spray hole, 22-Connecting pin hole, 30-Back pressure valve, 31-First mounting ring plate, 31a-Valve hole, 32-Second mounting ring plate, 32a-Guide hole, 33-Valve core, 34-Back pressure spring, 40-Piercing drive assembly, 41-Transmission ring plate, 42-Connecting ring platform, 43-Explosive structure, 43a-Ignition primer, 44-Spring pin, 45-Firing mechanism, 45a-Firing pin, 45b-Firing spring. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be noted that similar reference numerals and letters in the following drawings indicate similar items. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the embodiments of this application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0041] Meanwhile, the terms "set up," "open," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] Example

[0043] Combination Figures 1-3 This embodiment provides a puncture fire extinguishing device for a new energy vehicle power battery, comprising: a mobile vehicle body 10, capable of moving to the underside of a vehicle chassis, with a mounting cavity 11 having an opening at the top in the middle; a puncture spray bar 20, installed within the mounting cavity 11, having a through-hole structure, with a piston rod-shaped lower end adapted to the mounting cavity 11, and a pointed cone structure at the upper end with a spray hole 21 communicating with its own internal cavity; a back pressure valve 30, installed inside the puncture spray bar 20, capable of cutting off the internal cavity of the puncture spray bar 20, and opening under water pressure; and a water inlet channel 12, located on the mobile vehicle body 10, for connecting to a water source and guiding the water flow. The puncture spray bar 20 is positioned in the gap between its lower end and the bottom of the mounting cavity 11. A puncture drive assembly 40, mounted on the vehicle body 10, is located at the upper end of the mounting cavity 11 and along the movement path of the puncture spray bar 20. When connected to the puncture spray bar 20, it can drive the upper end of the puncture spray bar 20 to pierce into the battery pack. When the lower end of the puncture spray bar 20 moves to the puncture drive assembly 40, the puncture spray bar 20 is connected to the puncture drive assembly 40 and triggers the puncture drive assembly 40. The lower end of the puncture spray bar 20 is also connected to the water inlet channel 12.

[0044] Specifically, the mobile vehicle body 10 can be manually pushed under the power battery pack of the new energy vehicle. This can be done by sliding or by installing rolling components on the mobile vehicle body 10 to reduce friction. Of course, when pushing the mobile vehicle body 10, it is usually operated remotely using a lightweight insulating rod or other rod to ensure the safety of fire extinguishing. To facilitate remote operation, in this embodiment, the mobile vehicle body 10 is equipped with a track drive assembly 16 (such as the structure described in patent application CN121177696A). The track drive assembly 16 can drive the mobile vehicle body 10 to move independently, ensuring that the mobile vehicle body 10 can move independently while having a certain degree of high-temperature resistance, avoiding damage from high temperatures during fire extinguishing.

[0045] Combination Figure 1 and Figure 2The bottom side of the mounting cavity 11 is provided with a water inlet slit 13. The water inlet channel 12 is connected to the lower end of the piercing spray bar 20 and the cavity between the bottom of the mounting cavity 11 through the water inlet slit 13, so as to guide the water flow to the lower end of the piercing spray bar 20.

[0046] The mounting cavity 11 is further provided with a telescopic corrugated pipe 14. The upper end of the telescopic corrugated pipe 14 is fixedly connected to the lower end of the puncture spray rod 20, and the telescopic corrugated pipe 14 communicates with the inner cavity of the puncture spray rod 20. The lower end of the telescopic corrugated pipe 14 is fixed to the side wall of the mounting cavity 11, and the lower end of the telescopic corrugated pipe 14 is located above the water inlet slot 13, so as to ensure that when the puncture drive assembly 40 drives the puncture spray rod 20 to move upward, the puncture spray rod 20 can be reliably connected to the water inlet channel 12.

[0047] Continue to combine Figure 2 The back pressure valve 30 includes: a first mounting ring plate 31, coaxially fixed to the inner cavity of the piercing spray rod 20, adapted to the inner cavity of the piercing spray rod 20, and having a valve hole 31a in the middle; a second mounting ring plate 32, fixed to the inner cavity of the piercing spray rod 20 and located above the first mounting ring plate 31, and having a guide hole 32a on its outer periphery; a valve core 33, disposed between the first mounting ring plate 31 and the second mounting ring plate 32; and a back pressure spring 34, with an action force between the valve core 33 and the second mounting ring plate 32, capable of pressing the valve core 33 against the first mounting ring plate 31 to block the valve hole 31a through the valve core 33; wherein, when the pressure borne by the valve core 33 reaches a set value, the back pressure spring 34 can be squeezed upward to connect the valve core 33 and the guide hole 32a, ensuring that the back pressure valve 30 can play a back pressure role and conduct when the water pressure in the mounting cavity 11 reaches the spray pressure.

[0048] In this embodiment, the lower section of the valve core 33 is spherical, and the outer diameter of the lower end of the valve core 33 is larger than the inner diameter of the valve hole 31a, so that when the valve core 33 leaves the first mounting ring plate 31, there is sufficient effective flow area between it and the first mounting ring plate 31 to reduce the obstruction to the fire extinguishing water.

[0049] Meanwhile, the upper section of the valve core 33 is rod-shaped, and the back pressure spring 34 is sleeved on the upper section of the valve core 33; the second mounting ring plate 32 is provided with a guide hole in the middle, and the upper section of the valve core 33 slides through the guide hole, so as to ensure that the back pressure spring 34 and the valve core 33 can work reliably through the guidance of the valve core 33 rod section by the second mounting ring plate 32, and the support and limit of the valve core 33 rod section on the back pressure spring 34, thus avoiding the situation where the valve core 33 deflects and cannot return to its original position.

[0050] Combination Figure 3The vehicle body 10 has a drive ring cavity 15 at its upper middle part, which surrounds the upper part of the mounting cavity 11 and has an opening at its upper end. The puncture drive assembly 40 includes: a transmission ring plate 41, which covers the drive ring cavity 15 and allows the upper end of the puncture spray rod 20 to pass through its middle part; a connecting ring platform 42, which is fixed to the lower side of the transmission ring plate 41 and is spaced around the puncture spray rod 20; and an explosive device 43, which is installed inside the drive ring cavity 15. When the lower end of the puncture spray rod 20 moves into the connecting ring platform 42 and is limited, the connecting ring platform 42 is drivenly connected to the puncture spray rod 20. When the connecting ring platform 42 is drivenly connected to the puncture spray rod 20, the explosive device 43 can be triggered to detonate.

[0051] Therefore, the effective force-bearing area of ​​the transmission ring plate 41 is positively correlated with the cross-sectional area of ​​the drive ring cavity 15. The drive ring cavity 15 is arranged around the upper end of the mounting cavity 11, and its cross-sectional area is not constrained by its mounting components. It can extend to the upper edge of the vehicle body 10, so that the transmission ring plate 41 can output sufficient force. The explosive device 43 is installed in the drive ring cavity 15. When the connecting ring platform 42 is connected to the piercing spray bar 20, the explosive device 43 is triggered to explode. The impact (instantaneous high pressure) of the explosion of the explosive device 43 allows the transmission ring plate 41 to obtain sufficient pressure, thereby driving the piercing spray bar 20 to move upward instantaneously and penetrate the armor of the power battery pack (including the chassis armor), so that the piercing spray bar 20 is inserted into the power battery pack and the telescopic bellows 14 is stretched. At this time, the transmission ring plate 41 can play a limiting role to prevent the upper end of the piercing spray bar 20 from going out of the upper end of the power battery pack, ensuring that the spray hole 21 of the piercing spray bar is located inside the power battery pack.

[0052] To ensure the stability of the transmission ring plate 41 during installation, a certain installation preload can be applied by setting spring clips on the outer wall of the drive ring cavity 15. Alternatively, flexible plastic pins and metal pins with low pull-out force can be used to fix the transmission ring plate 41. Or, a magnet can be installed on the vehicle body 10, and the transmission ring plate 41 can be made of iron plate. A small torque installation preload can be applied by magnetic force to prevent the transmission ring plate 41 from moving away from the drive ring cavity 15 during movement, ensuring that the drive ring cavity 15 is a relatively closed and sealed cavity before the explosive device 43 detonates.

[0053] Combination Figure 4 and Figure 5The lower end sidewall of the piercing spray bar 20 is provided with a connecting pin hole 22 (the depth of the connecting pin hole 22 should be greater than the difference between the radius of the lower piston section and the radius of the upper rod section of the piercing spray bar 20). At the same time, the lower piston section and the upper rod section of the piercing spray bar 20 are transitioned by an inclined slope. The sidewall of the connecting ring platform 42 is provided with a spring pin 44. The driving ring cavity 15 is adapted to a firing mechanism 45. When the spring pin 44 abuts against the sidewall of the upper section of the piercing spray bar 20, the spring pin 44 restricts the firing mechanism 45, so that the firing mechanism 45 is in an energy storage state. When the lower end of the piercing spray bar 20 moves into the connecting ring platform 42 and is limited, the spring pin 44 is inserted into the connecting pin hole 22 and releases the restriction on the firing mechanism 45, thereby firing the explosive component 43.

[0054] It is understood that the firing mechanism 45 includes a firing pin 45a and a firing spring 45b. The firing pin 45a is slidably mounted on the outer wall of the connecting ring platform 42 (in this embodiment, the rod of the firing pin 45a is slidably inserted into the transmission ring plate 41), and the firing spring 45b is sleeved on the firing pin 45a (and inserted into the transmission ring plate 41). When the spring pin 44 abuts against the upper side wall of the piercing spray bar 20, the firing mechanism 45a... The firing pin 45a abuts against the end of the spring pin 44 away from the piercing nozzle 20, and the spring pin 44 is movable relative to the firing pin 45a along its own length. The explosive device 43 is equipped with a firing primer 43a, which is positioned directly opposite the firing pin 45a and below the spring pin 44 to ensure that the firing mechanism 45 is linked to the spring pin 44 and controlled by the timing of the spring pin 44. To reduce the resistance of the spring pin 44 to the movement of the firing pin 45a, a support roller is installed at the lower end of the firing pin 45a so that the friction between the firing pin 45a and the spring pin 44 is rolling friction.

[0055] It should be noted that the explosive device body 43 is provided with a cavity for the spring pin 44 and the firing pin 45a. The firing pin is installed at the bottom of the cavity. Multiple spring pins 44 and connecting pin holes 22 are evenly distributed along the circumference of the connecting ring platform 42 to ensure the reliability of the connection between the transmission ring plate 41 and the piercing spray bar 20. This ensures that when the transmission ring plate 41 is subjected to an explosive impact, it can drive the piercing spray bar 20 to pierce into the battery pack. At the same time, the pin shank of the spring pin 44 is made of high-strength alloy steel, and the end of the connecting pin hole 22 is rounded to prevent the piercing spray bar 20 from shearing and cutting the spring pin 44.

[0056] In summary, the new energy vehicle power battery puncture fire extinguishing device provided in this embodiment includes a vehicle body 10, a puncture spray bar 20, a back pressure valve 30, a water inlet channel 12, and a puncture drive assembly 40. The operation steps for using it to extinguish a fire are as follows:

[0057] S10. Install the piercing spray bar 20 in the mounting cavity 11, so that the inner end of the spring pin 44 abuts against the rod of the piercing spray bar 20 and the telescopic bellows 14 is in a folded state.

[0058] S20. Place the explosive assembly 43 in the drive ring cavity 15, such that the inner end of the spring pin 44 abuts against the upper end of the piercing spray bar 20 and the outer end is located in the corresponding cavity of the explosive assembly 43.

[0059] S30. Install the transmission ring plate 41 on the drive ring cavity 15 so as to close the drive ring cavity 15 through the transmission ring plate 41 and the connecting ring platform 42. The firing impact abuts against the inner end of the spring pin 44 and compresses the firing spring 45b.

[0060] S40. Connect the water inlet channel 12 to the waterless book supply pipe, and then move the vehicle body 10 to the bottom of the burning vehicle power battery pack.

[0061] S50. Open the corresponding water valve to input fire extinguishing water into the water inlet channel 12, so that the water flows into the space between the lower end of the piercing spray bar 20 and the bottom of the mounting cavity 11, thereby extinguishing the fire.

[0062] Combination Figure 1-5 Specifically, because a back pressure valve 30 is installed inside the piercing spray bar 20, the extinguishing water will not directly enter the piercing spray bar 20. As the water flow continues to enter, the water pressure in the mounting cavity 11 increases. Since the lower end of the piercing spray bar 20 is piston-shaped and there is no obstruction when the piercing spray bar 20 moves upward, only a small driving force (overcoming the weight of the piercing spray bar 20, the friction between it and the mounting cavity 11, and the pulling force that causes the telescopic bellows 14 to extend) is needed to move it upward. Thus, the water pressure in the mounting cavity 11 rises to the level of the back pressure valve 30. Before the pressure (water spray pressure) is turned on, the water pressure in the mounting cavity 11 drives the piercing spray bar 20 to move upward until the lower end of the piercing spray bar 20 moves to the piercing drive assembly 40. Under the guidance of the transition slope, the spring pin 44 is inserted into the corresponding connecting pin hole 22, connecting the piercing spray bar 20 to the transmission ring plate 41, thereby connecting it to the piercing drive assembly 40. Through the gravity of the transmission ring plate and the installation preload, the piercing spray bar 20 is restricted from continuing to move upward under the action of water pressure, thus achieving the initial lifting of the piercing spray bar 20.

[0063] After the lower end of the puncture spray bar 20 moves to the puncture drive assembly 40 and is connected to it, the resistance to the upward movement of the puncture spray bar 20 increases, requiring higher water pressure to drive it. However, after the water pressure in the mounting cavity 11 increases, the back pressure valve 30 opens to spray water. Therefore, the highest water pressure in the mounting cavity 11 is only slightly greater than the water spray pressure. At this time, it is only necessary to ensure that the lifting force of the water spray pressure acting on the puncture spray bar 20 cannot drive the transmission ring plate 41 to continue to lift.

[0064] After the spring pin 44 is inserted into the connecting pin hole, the spring pin 44 releases the limit on the firing pin 45a. Under the action of the firing spring 45b, the firing pin 45a moves down at high speed and strikes the firing primer 43a, igniting the explosive device 43 and causing it to explode. The explosive device 43 is installed in the drive ring cavity 15. The impact of the explosion of the explosive device 43 drives the piercing spray bar 20 to move up instantaneously and penetrate the armor of the power battery pack and pull the telescopic bellows 14 to the corresponding length so that the piercing spray bar 20 can be inserted into the power battery pack. At this time, the transmission ring plate 41 can play a limiting role to prevent the upper end of the piercing spray bar 20 from going out of the upper end of the power battery pack, ensuring that the spray hole 21 of the piercing spray bar is located inside the power battery pack.

[0065] Since the lower end of the piercing spray bar 20 is connected to the water inlet channel 12, the fire extinguishing water is sprayed out through the piercing spray bar 20. When the spray nozzle 21 sprays water, the water pressure of the fire extinguishing water can be maintained above the spray pressure, which can ensure that the back pressure valve 30 is always open in this state, so that water can be sprayed from the power battery pack of the new energy vehicle to extinguish the fire and achieve piercing fire extinguishing.

[0066] Therefore, during the entire operation of the device, the puncture spray bar 20 is first driven to move upward to the outside of the upper end of the vehicle body 10, and then the puncture drive assembly 40 drives the puncture spray bar 20 to move upward and pierce into the battery pack. This achieves the sequential lifting and piercing of the puncture spray bar 20, so that the puncture spray bar 20 can pierce into the battery pack with a small main body size. The length of the puncture spray bar 20 can be reduced and retracted into the vehicle body 10, achieving a low profile of the entire device. This results in a smaller puncture device height, which can be moved to under the chassis without lifting the vehicle, ensuring the timeliness of fire extinguishing and simplifying the fire extinguishing operation.

[0067] The piercing spray boom 20 has two strokes during operation. The second stroke only requires piercing the battery pack and pulling the telescopic bellows 14. Triggered by an explosion, it gains sufficient kinetic energy. The distance of the second stroke is determined solely by the battery pack's height above the ground, without being limited by other components, ensuring that the end of the piercing spray boom 20 can be inserted into the battery pack. Throughout the piercing and spraying process, only the water valve needs to be opened remotely. The fire extinguishing device itself only has a drive mechanism, requiring no additional hydraulic, pneumatic, or electric control for piercing. Furthermore, the heated end can be entirely made of metal, possessing sufficient high-temperature resistance and reliability, a long service life, and can be recycled multiple times (simply repeating steps S10-S30).

[0068] In addition, although this fire extinguishing device uses explosive detonation to drive penetration, the explosive component 43 is only triggered when liquid of the corresponding water pressure is present in the installation cavity 11, and will not be triggered during movement, thus ensuring high safety.

[0069] In summary, the new energy vehicle power battery puncture fire extinguishing device provided by the present invention features a puncture spray bar that sequentially rises and punctures during operation. It can be installed on vehicles with relatively low heights and has sufficient puncture stroke to balance the height of the puncture device and the puncture stroke, thus making the fire extinguishing device applicable to a wide range of vehicle models.

[0070] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A puncture extinguishing device for a power battery in a new energy vehicle, characterized in that, include: The vehicle body (10) can be moved to the bottom of the car chassis and has an installation cavity (11) with an opening at the top in the middle. The piercing spray bar (20) is installed in the mounting cavity (11). It has a through structure, with the lower end being a piston rod shape that is adapted to the mounting cavity (11) and the upper end being a pointed cone structure with a spray hole (21) that communicates with its own inner cavity. A back pressure valve (30) is installed inside the piercing spray bar (20), which can cut off the internal cavity of the piercing spray bar (20) and open under water pressure; A water inlet channel (12) is provided on the vehicle body (10) for connecting to a water source and guiding the water flow to the gap between the lower end of the piercing spray bar (20) and the bottom of the mounting cavity (11); The puncture drive assembly (40) is mounted on the vehicle body (10) and located at the upper end of the mounting cavity (11) and on the movement path of the puncture spray bar (20). When connected to the puncture spray bar (20), it can drive the upper end of the puncture spray bar (20) to puncture into the battery pack. When the lower end of the puncture spray bar (20) moves to the puncture drive assembly (40), the puncture spray bar (20) can be connected to the puncture drive assembly (40) and trigger the puncture drive assembly (40), and the lower end of the puncture spray bar (20) is connected to the water inlet channel (12).

2. The new energy vehicle power battery puncture extinguishing device according to claim 1, characterized in that, The back pressure valve (30) includes: The first mounting ring plate (31) is coaxially fixed to the inner cavity of the piercing spray bar (20), and is adapted to the inner cavity of the piercing spray bar (20), with a valve hole (31a) in the middle. The second mounting ring plate (32) is fixed in the inner cavity of the piercing spray bar (20) and is located above the first mounting ring plate (31), with a guide hole (32a) on its outer periphery. The valve core (33) is disposed between the first mounting ring plate (31) and the second mounting ring plate (32); The back pressure spring (34) has a force between the valve core (33) and the second mounting ring plate (32), which can press the valve core (33) against the first mounting ring plate (31) to block the valve hole (31a) through the valve core (33). When the pressure on the valve core (33) reaches the set value, the back pressure spring (34) can be squeezed upward to connect the valve core (33) and the guide hole (32a).

3. The new energy vehicle power battery puncture extinguishing device according to claim 2, characterized in that, The lower section of the valve core (33) is spherical, and the outer diameter of the lower end of the valve core (33) is larger than the inner diameter of the valve hole (31a).

4. The new energy vehicle power battery puncture extinguishing device according to claim 3, characterized in that, The upper section of the valve core (33) is rod-shaped, and the back pressure spring (34) is sleeved on the upper section of the valve core (33); The second mounting ring plate (32) has a guide hole in the middle, and the upper section of the valve core (33) slides through the guide hole.

5. The new energy vehicle power battery puncture extinguishing device according to claim 1, characterized in that, A water inlet slit (13) is provided on one side of the bottom of the mounting cavity (11). The water inlet channel (12) is connected to the cavity between the lower end of the piercing spray bar (20) and the bottom of the mounting cavity (11) through the water inlet slit (13).

6. The new energy vehicle power battery puncture extinguishing device according to claim 5, characterized in that, The mounting cavity (11) is also provided with a telescopic corrugated pipe (14), the upper end of which is fixedly connected to the lower end of the piercing spray rod (20), and the telescopic corrugated pipe (14) is connected to the inner cavity of the piercing spray rod (20). The lower end of the telescopic corrugated pipe (14) is fixed to the side wall of the mounting cavity (11), and the lower end of the telescopic corrugated pipe (14) is located above the water inlet slot (13).

7. The new energy vehicle power battery puncture extinguishing device according to claim 1, characterized in that, The upper part of the middle of the vehicle body (10) is provided with a drive ring cavity (15), which is arranged around the upper end of the mounting cavity (11) and has an opening at the upper end; The puncture drive assembly (40) includes: The transmission ring plate (41) covers the drive ring cavity (15), and the upper end of the piercing spray bar (20) can pass through the middle part; The connecting ring platform (42) is fixed on the lower side of the transmission ring plate (41) and is spaced out of the piercing spray bar (20); An explosive assembly (43) is installed inside the drive ring cavity (15); When the lower end of the piercing spray bar (20) moves into the connecting ring platform (42) and is limited, the connecting ring platform (42) is connected to the piercing spray bar (20) in a driving connection. When the connecting ring platform (42) is connected to the piercing spray bar (20), the explosive structure (43) can be triggered to explode.

8. The new energy vehicle power battery puncture extinguishing device according to claim 7, characterized in that, The lower end sidewall of the piercing spray bar (20) is provided with a connecting pin hole (22), and the sidewall of the connecting ring platform (42) is provided with a spring pin (44). The drive ring cavity (15) is equipped with a firing mechanism (45). When the spring pin (44) abuts against the upper side wall of the piercing spray bar (20), the spring pin (44) limits the firing mechanism (45) so that the firing mechanism (45) is in an energy storage state. When the lower end of the piercing spray bar (20) moves into the connecting ring platform (42) and is limited, the spring pin (44) is inserted into the connecting pin hole (22) and the limitation on the firing mechanism (45) is released.

9. The new energy vehicle power battery puncture extinguishing device according to claim 8, characterized in that, The firing mechanism (45) includes a firing pin (45a) and a firing spring (45b). The firing pin (45a) is slidably mounted on the outer side wall of the connecting ring platform (42), and the firing spring (45b) is sleeved on the outside of the firing pin (45a). When the spring pin (44) abuts against the upper side wall of the piercing spray bar (20), the firing pin (45a) abuts against the end of the spring pin (44) away from the piercing spray bar (20), and the spring pin (44) can move relative to the firing pin (45a) along its own length direction. The explosive assembly (43) is equipped with a firing primer (43a) which is positioned opposite the firing pin (45a) and is located below the spring pin (44).

10. The new energy vehicle power battery puncture extinguishing device according to any one of claims 1 to 9, characterized in that, The vehicle body (10) is equipped with a track drive assembly (16), which can drive the vehicle body (10) to move on its own.

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