Automatic temperature-sensing fire extinguishing device for new energy battery packs

Abstract

This utility model relates to the technical field of vehicle fire extinguishing, and discloses an automatic temperature-sensing fire extinguishing device for a new energy battery pack, including a housing body, a heat-conducting component, a gas cylinder, an expanding agent, and a pin. The gas cylinder is used to pressurize the fireproof chamber, and the heat-conducting component is used to introduce the temperature of the battery pack into the starting chamber. The heat-conducting component can ignite the expanding agent. The pin can rotate relative to the housing body, and the ignited expanding agent can push the pin to rotate and move, causing the pin to puncture the gas cylinder. The heat-conducting component transmits the signal of battery pack fire to the starting chamber and ignites the expanding agent. The expansion of the expanding agent pushes the pin to move and rotate, making it easier for the pin to puncture the gas cylinder. The gas in the gas cylinder is released into the fireproof chamber, blowing the extinguishing medium, making the pressure release more thorough when the gas cylinder is punctured, and the fire extinguishing effect better. This solves the technical problems of pressure relief failure and poor fire extinguishing effect in the prior art, achieving the technical effect of ensuring fire extinguishing function while improving fire extinguishing effect.

Description

Technical Field

[0001] This utility model relates to the field of vehicle fire extinguishing technology, and in particular to an automatic temperature-sensing fire extinguishing device for a new energy battery pack. Background Technology

[0002] With the rapid popularization of the lithium battery energy storage industry and new energy vehicles, thermal runaway fires caused by overcharging, short circuits, and compression overheating of lithium batteries are increasing year by year. The internal space of the battery pack has been optimized through compact design to maximize the space for cell placement, leaving very little remaining assembly margin. Existing sprinkler systems, portable fire extinguishers, and conventional pressurized fire extinguishing cylinders on the market are too large to be embedded in the narrow cavity of the battery pack, and most vehicles and energy storage equipment cannot be pre-installed with built-in fire extinguishing devices at the factory.

[0003] In the existing technology, the cavity of the pressurized fire extinguishing assembly is pre-stored with high-pressure gas and fire extinguishing medium for a long time. During the process of bumps and friction, the high-pressure gas and fire extinguishing medium are prone to slow depressurization, which leads to the failure of the fire extinguishing assembly and the inability to achieve the fire extinguishing function. At the same time, when the high-pressure parts inside the fire extinguishing assembly release pressure, the release process is too slow, resulting in insufficient spraying force of the fire extinguishing medium and poor fire extinguishing effect. Utility Model Content

[0004] The purpose of this invention is to provide an automatic temperature-sensing fire extinguishing device for new energy battery packs, which solves the technical problems of pressure relief failure and poor fire extinguishing effect in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides an automatic temperature-sensing fire extinguishing device for new energy battery packs, including a shell body, a heat-conducting component, a gas storage cylinder, an expanding agent, and a pin. The main body of the shell is provided with a fireproof cavity, the fireproof cavity is provided with fire extinguishing medium, the gas storage cylinder is provided in the fireproof cavity, the gas storage cylinder is connected to the main body of the shell, and the gas storage cylinder is used to pressurize the fireproof cavity, so that the fire extinguishing medium overflows from the outlet of the fireproof cavity and extinguishes the fire. One end of the gas storage cylinder is provided with a starting chamber, the expanding agent is disposed in the starting chamber, one end of the heat-conducting component extends into the starting chamber, and the other end of the heat-conducting component is connected to the battery pack. The heat-conducting component is used to introduce the temperature of the battery pack into the starting chamber, and the heat-conducting component can ignite the expanding agent. The expanding agent is provided with a push pin between it and the gas storage bottle. The push pin is slidably connected to the housing body. The push pin is provided with threads on its outside, so that the push pin can rotate relative to the housing body. The ignited expanding agent can push the push pin to rotate and move, so that the push pin punctures the gas storage bottle.

[0006] In an optional embodiment, the housing body includes an outer shell and a connecting base; The fireproof cavity is provided inside the outer shell. The outer shell is connected to the connecting seat, the connecting seat is connected to the gas storage cylinder, the ejector pin is slidably connected in the connecting seat, the heat-conducting component is detachably connected to the connecting seat, and part of the heat-conducting component and the connecting seat form the starting cavity. The connecting seat is provided with multiple through holes, which are located close to the gas storage cylinder. The gas storage cylinder supplies gas to the fireproof cavity through the multiple through holes.

[0007] In an optional embodiment, the ejector pin includes a needle and a base; The needle is connected to the base, the base is slidably connected to the inner wall of the connecting seat, and the needle is threadedly connected to the connecting seat. The needle is provided with multiple arrows, which are spaced apart along the circumference of the needle.

[0008] In an optional embodiment, an elastic element is further included, which is sleeved on the needle, with its two ends abutting against the base and the connecting seat respectively, and the elastic element having a tendency to move the base away from the gas storage cylinder.

[0009] In an optional embodiment, the heat-conducting component includes a heat-conducting wire and a connecting cap; The connecting cap is threadedly connected to the connecting seat, and the connecting cap and the connecting seat together form the starting cavity; The heat-conducting wire passes through the connecting cap, is connected to the connecting cap, and its end is connected to the expanding agent.

[0010] In an optional embodiment, the housing body further includes end caps; The end cap is threadedly connected to the connecting seat, and the end cap is provided with a round hole, through which the heat-conducting wire passes.

[0011] In an optional embodiment, the housing body is provided with an aluminum foil, a gasket, and a nut; The fireproof cavity is provided with an aluminum film and a gasket at its outlet. The aluminum film is used to seal the outlet, and the gasket is annular and abuts against the aluminum film. The nut is threadedly connected to the housing body and fixes the gasket and aluminum film to the housing body.

[0012] In an optional implementation, a nozzle and a connecting pipe are also included; The nozzle is provided with multiple holes, which are spaced apart along the surface of the nozzle. The nozzle is fastened onto the gasket, and the nut is sleeved on the nozzle, pressing the nozzle tightly onto the gasket. The connecting pipe is disposed inside the fireproof cavity, one end of the connecting pipe is connected to the main body of the shell, and the end of the connecting pipe is disposed close to the aluminum film.

[0013] In an optional implementation, a filling port and a filling plug are also included; The filling port extends through the main body of the housing, and the filling plug is disposed inside the filling port. The filling plug is slidably connected to the filling port, and the filling plug can block or open the filling port.

[0014] In optional implementations, a feedback line and an alarm are also included; One end of the feedback line is connected to the heat-conducting component, and the other end of the feedback line is connected to the alarm. The feedback line is used to provide a signal to the alarm.

[0015] This utility model provides an automatic temperature-sensing fire extinguishing device for a new energy battery pack, comprising a housing body, a heat-conducting component, a gas cylinder, an expanding agent, and a pin. A fireproof chamber is provided inside the housing body, containing a fire extinguishing medium. The gas cylinder is located within the fireproof chamber and connected to the housing body. The gas cylinder pressurizes the fireproof chamber, causing the fire extinguishing medium to overflow from the chamber's outlet and extinguish the fire. An activation chamber is located at one end of the gas cylinder, containing the expanding agent. One end of the heat-conducting component extends into the activation chamber, and the other end is connected to the battery pack. The heat-conducting component directs the battery pack's temperature into the activation chamber and ignites the expanding agent. A pin is positioned between the expanding agent and the gas cylinder, slidingly connected to the housing body. The pin has threads that allow it to rotate relative to the housing body. The ignited expanding agent pushes the pin to rotate and move, causing it to puncture the gas cylinder. The signal of battery pack ignition is transmitted to the starting chamber through the heat-conducting component, igniting the expanding agent. The expansion of the expanding agent pushes the ejector pin to move and rotate, making it easier for the ejector pin to puncture the gas cylinder. The gas in the gas cylinder is released into the fireproof chamber, blowing the extinguishing medium. This makes the pressure release when the gas cylinder is punctured more thorough, resulting in a better fire extinguishing effect. It solves the technical problems of pressure relief failure and poor fire extinguishing effect in the existing technology, achieving the technical effect of ensuring fire extinguishing function while improving fire extinguishing effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the automatic temperature-sensing fire extinguishing device for new energy battery packs mentioned in the embodiments of this utility model; Figure 2 This is a cross-sectional view of the automatic temperature-sensing fire extinguishing device for new energy battery packs mentioned in the embodiments of this utility model; Figure 3 This is a schematic diagram of the structure of the ejector pin mentioned in the embodiments of this utility model; Figure 4 This is another structural schematic diagram of the ejector pin mentioned in the embodiments of this utility model.

[0017] In the diagram, 1-fireproof chamber; 2-gas cylinder; 3-starting chamber; 4-outer shell; 5-connecting seat; 6-piercing needle; 7-base; 8-heat-conducting wire; 9-connecting cap; 10-end cap; 11-aluminum film; 12-nut; 13-nozzle; 14-connecting pipe; 15-filling port; 16-filling plug. Detailed Implementation

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical 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 utility model based on the specific circumstances.

[0020] In related technologies, the chamber of a pressurized fire extinguishing assembly is pre-stored with high-pressure gas and extinguishing medium for a long time. During bumps and friction, the high-pressure gas and extinguishing medium are prone to slow depressurization, which can cause the fire extinguishing assembly to fail and fail to perform its fire extinguishing function. At the same time, when the high-pressure parts inside the fire extinguishing assembly release pressure, the release process is too slow, resulting in insufficient spraying force of the extinguishing medium and poor fire extinguishing effect.

[0021] In view of this, such as Figures 1-4 As shown, some embodiments of this utility model provide an automatic temperature-sensing fire extinguishing device for a new energy battery pack, including a housing body, a heat-conducting component, a gas cylinder 2, an expanding agent, and a pin. A fireproof chamber 1 is provided inside the housing body, containing a fire extinguishing medium. The gas cylinder 2 is located inside the fireproof chamber 1 and connected to the housing body. The gas cylinder 2 is used to pressurize the fireproof chamber 1, causing the fire extinguishing medium to overflow from the outlet of the fireproof chamber 1 and extinguish the fire. An activation chamber 3 is provided at one end of the gas cylinder 2, containing the expanding agent. One end of the heat-conducting component extends into the activation chamber 3, and the other end is connected to the battery pack. The heat-conducting component is used to introduce the temperature of the battery pack into the activation chamber 3 and can ignite the expanding agent. A pin is provided between the expanding agent and the gas cylinder 2, slidingly connected to the housing body. The pin has threads on its exterior, allowing it to rotate relative to the housing body. The ignited expanding agent can push the pin to rotate and move, causing the pin to puncture the gas cylinder 2.

[0022] In the above embodiments, the main body of the casing can be made of metal, such as aluminum alloy, and can be rectangular in shape. A fireproof chamber 1 is provided inside the main body of the casing. The fireproof chamber 1 can be filled with a fire extinguishing medium, such as sodium bicarbonate powder. The fire extinguishing medium can be accumulated in the fireproof chamber 1. The gas cylinder 2 can be made of metal and can be sealed. The gas cylinder 2 can be filled with high-pressure carbon dioxide gas. A metal film can be provided at the opening end of the gas cylinder 2 to facilitate the puncture of the gas cylinder 2 by the puncture needle. After the high-pressure gas in the gas cylinder 2 is released, it fills the fireproof chamber 1 and blows the fire extinguishing medium out through the outlet of the fireproof chamber 1. Thus, the battery pack can be extinguished by the high-pressure gas and the fire extinguishing medium.

[0023] The starting chamber 3 is located at the open end of the gas cylinder 2. The starting chamber 3 can be semi-closed. An expanding agent, which can be gunpowder, is placed inside the starting chamber 3. One end of the heat-conducting component can be connected to the battery pack, and the other end can extend into the starting chamber 3. The heat-conducting component can be a rope containing gunpowder and accelerant inside. After the battery pack catches fire or reaches a certain temperature, the gunpowder in the heat-conducting component can be ignited. The ignition is then transferred to the starting chamber 3 to ignite the expanding agent. After the expanding agent is ignited, the gas pressure in the starting chamber 3 increases, which pushes the ejector pin. The ejector pin moves along the thread and a preset path, causing the ejector pin to rotate and pierce the gas cylinder 2. After piercing the gas cylinder 2, the ejector pin can be driven back by the high-pressure gas in the gas cylinder 2, facilitating the escape of the high-pressure gas. At the same time, the rotational piercing method makes the piercing smoother.

[0024] This utility model provides an automatic temperature-sensing fire extinguishing device for a new energy battery pack, comprising a housing body, a heat-conducting component, a gas cylinder 2, an expanding agent, and a pin. A fireproof chamber 1 is provided inside the housing body, containing a fire extinguishing medium. The gas cylinder 2 is located inside the fireproof chamber 1 and connected to the housing body. The gas cylinder 2 pressurizes the fireproof chamber 1, causing the fire extinguishing medium to overflow from the outlet of the fireproof chamber 1 and extinguish the fire. An activation chamber 3 is located at one end of the gas cylinder 2, containing the expanding agent. One end of the heat-conducting component extends into the activation chamber 3, and the other end is connected to the battery pack. The heat-conducting component guides the temperature of the battery pack into the activation chamber 3 and ignites the expanding agent. A pin is located between the expanding agent and the gas cylinder 2, slidingly connected to the housing body. The pin has threads that allow it to rotate relative to the housing body. The ignited expanding agent pushes the pin to rotate and move, causing the pin to puncture the gas cylinder 2. The signal of battery pack ignition is transmitted to the starting chamber 3 through the heat-conducting component, and the expanding agent is ignited. The expansion of the expanding agent pushes the ejector pin to move and rotate, making it easier for the ejector pin to puncture the gas cylinder 2. The gas in the gas cylinder 2 is released into the fireproof chamber 1, blowing the extinguishing medium. This makes the pressure release more thorough when the gas cylinder 2 is punctured, resulting in a better fire extinguishing effect. This solves the technical problems of pressure relief failure and poor fire extinguishing effect in the existing technology, and achieves the technical effect of ensuring fire extinguishing function while improving fire extinguishing effect.

[0025] In an optional embodiment, the main body of the housing includes an outer shell 4 and a connecting seat 5; a fireproof cavity 1 is provided inside the outer shell 4, the outer shell 4 and the connecting seat 5 are connected, the connecting seat 5 is connected to the gas storage cylinder 2, the ejector pin is slidably connected in the connecting seat 5, the heat-conducting component is detachably connected to the connecting seat 5, and part of the heat-conducting component and the connecting seat 5 form a starting cavity 3; the connecting seat 5 is provided with multiple through holes, which are located close to the gas storage cylinder 2, and the gas storage cylinder 2 supplies gas to the fireproof cavity 1 through the multiple through holes.

[0026] In the above embodiment, the outer shell 4 can be formed by bonding two metal shells of the same structure. A sealing gasket can be provided on the outer shell 4 to seal it. A fireproof cavity 1 is provided inside the outer shell 4. A connecting seat 5 is provided on one side of the outer shell 4. The connecting seat 5 can be connected to the outer shell 4 by threads. The connecting seat 5 can be cylindrical. The connecting seat 5 can be connected to a hole on one side of the outer shell 4 by bolts, so that the outer shell 4 and the connecting seat 5 are firmly connected. A channel is provided inside the connecting seat 5, and a pin is inserted into the channel inside the connecting seat 5. The upper part can be provided with threads, and the outer part of the ejector pin can be provided with external threads. The threads can all use a large pitch to avoid the ejector pin getting stuck and facilitate the movement and rotation of the ejector pin. The end of the connecting seat 5 that extends into the fireproof cavity 1 can be provided with internal threads. The gas cylinder 2 is fixed to the connecting seat 5 by the threads, so that the gas cylinder 2 can be better fixed. In addition, multiple circular through holes are provided on the connecting seat 5 near the end of the gas cylinder 2. The multiple through holes are arranged along the circumference of the connecting seat 5, so that the punctured gas cylinder 2 can supply gas into the fireproof cavity 1 through the multiple through holes.

[0027] In an optional embodiment, the ejector pin includes a needle 6 and a base 7; the needle 6 and the base 7 are connected, the base 7 is slidably connected to the inner wall of the connecting seat 5, and the needle 6 is threadedly connected to the connecting seat 5; the needle 6 is provided with multiple arrows, which are spaced apart along the circumference of the needle 6.

[0028] In the above embodiment, the base 7 and the needle 6 can be integrally formed. Both the base 7 and the needle 6 can be made of metal. The base 7 can be cylindrical and slidably connected to the channel of the connecting seat 5. A rubber sealing ring can also be fitted on the outside of the base 7 to make the base 7 and the connecting seat 5 more sealed, so that the burning expansion agent can better push the base 7. The needle 6 is located at the end of the base 7 near the gas cylinder 2. The end of the needle 6 away from the base 7 is provided with a pointed end. After the needle 6 moves, it punctures the gas cylinder 2 through the pointed end, so that the gas cylinder 2 can release high-pressure gas outward. Furthermore, an arrow can be provided at the end of the needle 6. The needle 6 can be provided with one arrow or multiple arrows. The axes of multiple arrows coincide. When the external thread on the surface of the needle 6 is engaged with the connecting seat 5, the gas cylinder 2 can be punctured by multiple arrows rotating, so that the puncture area of ​​the gas cylinder 2 is larger, avoiding the gas cylinder 2 being blocked by the needle 6 after puncture, which would cause the high-pressure gas to overflow unsmoothly, allowing the extinguishing medium to overflow faster and the extinguishing effect to be better.

[0029] Optionally, the diameter of the needle 6 is smaller than the diameter of the base 7, so that the base 7 can abut against the step of the connecting seat 5 during movement, thereby limiting the movement path of the base 7 and preventing the needle 6 from flying out and causing injury.

[0030] Optionally, the needle 6 can also be hollow and have holes on its side wall. After the needle 6 punctures the gas cylinder 2, the gas can be vented out through the hollow part of the needle 6 and the holes in the gas cylinder 2.

[0031] In an optional embodiment, an elastic element is also included. The elastic element is sleeved on the needle 6, and its two ends abut against the base 7 and the connecting seat 5, respectively. The elastic element has a tendency to move the base 7 away from the gas storage bottle 2.

[0032] In the above embodiment, the elastic element can be set as a spring. The elastic element is sleeved on the needle 6, and the two ends of the elastic element abut against the base 7 and the connecting seat 5 respectively. So after the expanding agent is ignited, the expanding agent pushes the base 7, so that the base 7, along with the needle 6, squeezes the elastic element to puncture the gas storage bottle 2. Then, under the action of the elastic element, the base 7 and the needle 6 can return to their original positions, thereby further preventing the needle 6 from affecting the overflow of high-pressure gas from the gas storage bottle 2, and making the release of high-pressure gas smoother.

[0033] In an optional embodiment, the heat-conducting component includes a heat-conducting wire 8 and a connecting cap 9; the connecting cap 9 is threadedly connected to the connecting seat 5, and the connecting cap 9 and the connecting seat 5 form a starting cavity 3; the heat-conducting wire 8 passes through the connecting cap 9, the heat-conducting wire 8 is connected to the connecting cap 9, and the end of the heat-conducting wire 8 is connected to the expanding agent.

[0034] In the above embodiment, one end of the heat-conducting wire 8 can be placed inside the battery pack and in contact with the battery cell, and the other end of the heat-conducting wire 8 can pass through the connecting cap 9 and extend into the starting cavity 3. The heat-conducting wire 8 can be a rope with gunpowder and combustion aid inside. After one end of the heat-conducting wire 8 is heated, it can transfer sparks to the starting cavity 3 to ignite the expansion agent, so that the expansion agent can be ignited. Furthermore, the connecting cap 9 can be connected to the connecting seat 5 by threads. The connecting cap 9, the connecting seat 5, and the base 7 can form the starting cavity 3, which facilitates subsequent assembly.

[0035] In an optional embodiment, the housing body further includes an end cap 10; the end cap 10 is threadedly connected to the connecting seat 5, and the end cap 10 is provided with a round hole, through which the heat conduction wire 8 passes.

[0036] In the above embodiments, the end cap 10 can be made of metal, and the end cap 10 can also be provided with a round hole to facilitate the passage of the heat conduction wire 8. The end cap 10 can be threaded to the connecting seat 5. The end cap 10 can seal the opening side of the connecting seat 5 to prevent foreign objects from entering and to prevent the expansion agent from getting damp.

[0037] In an optional embodiment, an aluminum film 11, a gasket, and a nut 12 are provided on the main body of the housing; an aluminum film 11 and a gasket are provided at the outlet of the fireproof cavity 1. The aluminum film 11 is used to seal the outlet, the gasket is annular and abuts against the aluminum film 11, and the nut 12 is threadedly connected to the main body of the housing, and the nut 12 fixes the gasket and the aluminum film 11 to the main body of the housing.

[0038] In the above embodiment, the aluminum membrane 11 can be circular, and the outer shell 4 is provided with a circular outlet. A step is provided at the outlet of the outer shell 4. The aluminum membrane 11 is laid at the outlet to block the outlet. An annular gasket is placed on the aluminum membrane 11 to fix the aluminum membrane 11 and prevent it from moving. The nut 12 can be threaded onto the outer shell 4. The nut 12 can press the gasket and the aluminum membrane 11 tightly onto the outer shell 4, thereby fixing the gasket and the aluminum membrane 11. After the gas cylinder 2 is punctured, the high-pressure gas in the gas cylinder 2 fills the fireproof chamber 1 and reaches the temporary pressure of the aluminum membrane 11, which then punctures the aluminum membrane 11, causing it to break. Then, the high-pressure gas carries the extinguishing medium and sprays out, thereby extinguishing the fire. The aluminum membrane 11 can seal the fireproof chamber 1 under normal conditions to prevent the extinguishing medium from overflowing. In an emergency, the extinguishing medium can be sprayed by puncturing the aluminum membrane 11 under high pressure.

[0039] In an optional embodiment, a nozzle 13 and a connecting pipe 14 are also included; the nozzle 13 is provided with a plurality of holes, which are spaced apart along the surface of the nozzle 13; the nozzle 13 is fastened onto a gasket; a nut 12 is sleeved on the nozzle 13; the nut 12 presses the nozzle 13 tightly onto the gasket; the connecting pipe 14 is disposed in the fireproof cavity 1; one end of the connecting pipe 14 is connected to the main body of the housing; and the end of the connecting pipe 14 is disposed near the aluminum film 11.

[0040] In the above embodiment, the nozzle 13 can be made of metal and is shaped like a round cap. The nozzle 13 can be provided with multiple circular holes. The holes of the nozzle 13 can be provided on the curved surface of the side or on the circular surface of the end. The nozzle 13 can be pressed on the gasket, and the nut 12 can be sleeved around the nozzle 13. The nut 12 can be threaded to the outer shell 4. The nut 12 can press the nozzle 13, the gasket and the aluminum film 11 onto the outer shell 4 in sequence, thereby fixing the nozzle 13, the gasket and the aluminum film 11.

[0041] The connecting pipe 14 can be in the shape of a round tube. The connecting pipe 14 can be connected to the outer shell 4 by means of threads or flanges. One end of the connecting pipe 14 extends into the fireproof chamber 1, and the other end of the connecting pipe 14 can be close to the center of the aluminum film 11. Thus, after the gas cylinder 2 is punctured, the high-pressure gas can break through the aluminum film 11, and the high-pressure gas can carry the extinguishing medium into the nozzle 13 through the siphon effect of the connecting pipe 14. The gas is then sprayed in all directions through the holes of the nozzle 13, which improves the utilization rate of the extinguishing medium and increases the extinguishing area.

[0042] In an optional embodiment, it also includes a filling port 15 and a filling plug 16; the filling port 15 is disposed through the main body of the housing, the filling plug 16 is disposed inside the filling port 15, the filling plug 16 is slidably connected to the filling port 15, and the filling plug 16 can block or open the filling port 15.

[0043] In the above embodiment, the filling port 15 can be provided on the outer shell 4. The filling port 15 can be circular and can penetrate through the outer shell 4. The filling port 15 can be located near the side wall at the bottom of the outer shell 4. A filling plug 16 is provided inside the filling port 15. The filling plug 16 can be cylindrical and can be connected to the filling port 15 by a spring. The channel inside the filling port 15 can be conical, with the diameter decreasing along the direction of the channel entering the fireproof chamber 1. A disc for sealing the filling port 15 is provided on the filling plug 16. The spring can pull the filling plug 16 so that the filling plug 16 seals the filling port 15 through the disc. When it is necessary to add fire extinguishing medium, the filling plug 16 can be pushed to open the filling port 15 and add fire extinguishing medium after overcoming the spring. After the fire extinguishing medium is added, the filling plug 16 can be pulled by the spring to close the filling port 15.

[0044] In an optional implementation, a feedback line and an alarm are also included; one end of the feedback line is connected to a heat-conducting component, and the other end of the feedback line is connected to the alarm, the feedback line being used to provide a signal to the alarm.

[0045] In the above embodiment, the feedback line can be integrated with the heat-conducting line 8, and the feedback line can also pass through the end cover 10. The feedback line can be equipped with a thermistor. The thermistor connected to the feedback line can monitor the temperature of the heat-conducting line 8 and the start-up cavity 3. After a fire occurs, when the temperature of the feedback line rises or the temperature inside the start-up cavity 3 rises, the feedback line can inform the outside of the current change, so that the alarm can be triggered. The alarm can be an audible and visual alarm to remind people to avoid danger.

[0046] Optionally, the outer casing 4 can be provided with multiple connecting ears, which can be connected to the battery pack by bolts. The outer casing 4 can be located in the middle of the battery pack, thereby covering a larger area of ​​the battery pack and achieving higher fire resistance.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A new energy battery pack automatic temperature sensing fire extinguishing device, characterized in that, It includes the main body of the casing, heat-conducting components, gas cylinder, expanding agent, and ejector pin; The main body of the shell is provided with a fireproof cavity, the fireproof cavity is provided with fire extinguishing medium, the gas storage cylinder is provided in the fireproof cavity, the gas storage cylinder is connected to the main body of the shell, and the gas storage cylinder is used to pressurize the fireproof cavity, so that the fire extinguishing medium overflows from the outlet of the fireproof cavity and extinguishes the fire. One end of the gas storage cylinder is provided with a starting chamber, the expanding agent is disposed in the starting chamber, one end of the heat-conducting component extends into the starting chamber, and the other end of the heat-conducting component is connected to the battery pack. The heat-conducting component is used to introduce the temperature of the battery pack into the starting chamber, and the heat-conducting component can ignite the expanding agent. The expanding agent is provided with a push pin between the expanding agent and the gas storage bottle. The push pin is slidably connected to the main body of the housing. The push pin is provided with threads on the outside, so that the push pin can rotate relative to the main body of the housing. The ignited expanding agent can push the push pin to rotate and move, so that the push pin punctures the gas storage bottle. The main body of the housing is provided with an aluminum foil, a gasket, and a nut; The fireproof cavity is provided with the aluminum film and the gasket at the outlet. The aluminum film is used to seal the outlet. The gasket is annular and abuts against the aluminum film. The nut is threadedly connected to the housing body and fixes the gasket and the aluminum film to the housing body. It also includes nozzles and connecting pipes; The nozzle is provided with multiple holes, which are spaced apart along the surface of the nozzle. The nozzle is fastened onto the gasket, and the nut is sleeved on the nozzle, pressing the nozzle tightly onto the gasket. The connecting pipe is disposed inside the fireproof cavity, one end of the connecting pipe is connected to the main body of the shell, and the end of the connecting pipe is disposed close to the aluminum film.

2. The automatic temperature sensing fire extinguishing device for new energy battery pack according to claim 1, characterized in that, The main body of the housing includes an outer shell and a connecting base; The fireproof cavity is provided inside the outer shell. The outer shell is connected to the connecting seat, the connecting seat is connected to the gas storage cylinder, the ejector pin is slidably connected in the connecting seat, the heat-conducting component is detachably connected to the connecting seat, and part of the heat-conducting component and the connecting seat form the starting cavity. The connecting seat is provided with multiple through holes, which are located close to the gas storage cylinder. The gas storage cylinder supplies gas to the fireproof cavity through the multiple through holes.

3. The automatic temperature sensing fire extinguishing device for new energy battery pack according to claim 2, characterized in that, The ejector pin includes an insertion needle and a base; The needle is connected to the base, the base is slidably connected to the inner wall of the connecting seat, and the needle is threadedly connected to the connecting seat. The needle is provided with multiple arrows, which are spaced apart along the circumference of the needle.

4. The automatic temperature sensing fire extinguishing device for new energy battery pack according to claim 3, characterized in that, It also includes an elastic element, which is sleeved on the needle. The two ends of the elastic element abut against the base and the connecting seat, respectively. The elastic element has a tendency to move the base away from the gas storage cylinder.

5. The automatic temperature sensing fire extinguishing device for new energy battery pack according to claim 2, characterized in that, The heat-conducting component includes a heat-conducting wire and a connecting cap; The connecting cap is threadedly connected to the connecting seat, and the connecting cap and the connecting seat together form the starting cavity; The heat-conducting wire passes through the connecting cap, is connected to the connecting cap, and its end is connected to the expanding agent.

6. The automatic temperature-sensing fire extinguishing device for new energy battery packs according to claim 5, characterized in that, The housing body also includes end caps; The end cap is threadedly connected to the connecting seat, and the end cap is provided with a round hole, through which the heat-conducting wire passes.

7. The automatic temperature sensing fire extinguishing device for new energy battery pack according to claim 1, characterized in that, It also includes the filling port and the filling plug; The filling port extends through the main body of the housing, and the filling plug is disposed inside the filling port. The filling plug is slidably connected to the filling port, and the filling plug can block or open the filling port.

8. The automatic temperature sensing fire extinguishing device for new energy battery pack according to claim 1, characterized in that, It also includes a feedback line and an alarm; One end of the feedback line is connected to the heat-conducting component, and the other end of the feedback line is connected to the alarm. The feedback line is used to provide a signal to the alarm.

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