A lithium battery cell-level fire-fighting device

Abstract

The utility model relates to a lithium battery cell-level fire-fighting device, which includes a shell, an impact slider, an impact needle, an aluminum foil film, a sealing ring and a fire-fighting pipeline. The upper and middle parts of the shell side are provided with a plurality of evenly distributed water flow grooves, the lower part of the shell side is provided with a plurality of evenly distributed elastic keys and pressure relief holes, the top of the shell is provided with a temporary water tank, the middle part of the temporary water tank is provided with a water tank annular hole, the middle part of the impact slider is provided with a keyway, the impact slider is placed in the shell, the elastic key is disassembled and installed in the keyway, the impact needle is fixedly connected to the impact slider, and the impact needle is placed in the water tank circular hole; the sealing ring covers the outer edge of the aluminum foil film, the bottom of the fire-fighting pipeline is fixedly connected to the top of the shell, the aluminum foil film is placed between the top of the shell and the bottom of the fire-fighting pipeline, and the impact needle is located below the aluminum foil film. The utility model can carry out efficient and accurate fire-fighting of thermal runaway cells.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a lithium battery core-level fire-fighting device. Background Art

[0002] At present, in lithium-ion battery energy storage systems, most fire protection designs are based on the PACK level as the smallest unit for fire protection, and there are also overall direct fire protection solutions for the entire cabinet and the entire box. The fire protection material is mainly perfluorohexanone. These fire protection often have large losses and high fire protection costs, and they are all partial or overall fire protection, that is, fire protection for the entire box or the entire package, but they do not accurately extinguish the runaway battery cell when the single battery cell is thermally runaway. This results in a long time, slow speed, and poor targeting of the fire protection. It can be seen from this that PACK-level fire protection and overall fire protection are difficult, and it is impossible to accurately extinguish the thermal runaway battery cell, resulting in low fire protection efficiency.

[0003] Chinese patent CN218853352U discloses a lithium battery module-level fire extinguishing device, in which the pressure switch is connected to the one-way valve, the pressure gauge is connected to the container valve, and the perfluorohexanone container cylinder is located at the rear of the standard cabinet and fixed to the corresponding position by bottle holder fixings and bolts; the fire detection tube is placed inside the battery pack, passing through and fixed in the middle of each battery module, and a single battery pack is provided with multiple cells. It integrates detection and fire extinguishing, and does not require special smoke and temperature sensors and other detector linkage; the fire extinguishing speed is fast, and the fire extinguishing agent is directly sprayed to the fire point through the blasting hole, which can quickly extinguish the initial fire and effectively reduce the loss; the fire detection tube is flexible and can be conveniently arranged in various small or complex spaces; it uses perfluorohexanone for fire fighting, and even if it can extinguish a small range of fire, its fire fighting cost is high.

[0004] Chinese patent CN217067458U discloses a fully immersed lithium battery fire fighting device, in which the oil cylinder is filled with coolant that can immerse the lithium battery pack; the oil pillow is connected to the oil cylinder, and a gas relay and a throttle valve are arranged between the oil pillow and the oil cylinder; the pressure relief valve is connected to the oil cylinder, and is provided with an internal oil drain port and an air drain port respectively connected to the oil pillow; the cooling pipeline includes a main drain pipe, a branch return pipe, a branch inlet pipe, a main return pipe and a main inlet pipe; the main drain pipe, the branch return pipe and the branch inlet pipe are respectively connected to the inside of the oil pillow; the main return pipe is connected to the branch return pipe, and the main inlet pipe is connected to the branch inlet pipe; the nitrogen injection pipeline includes an internal nitrogen injection main pipe connected to the oil pillow. It takes away the heat generated by the lithium battery pack in time, making it difficult for the lithium battery pack to have thermal runaway, but it needs to run continuously, which will generate a lot of energy consumption and the fire fighting cost is high. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a lithium battery cell-level fire-fighting device, which can accurately extinguish the thermal runaway battery cell.

[0006] The utility model provides a lithium battery cell-level fire-fighting device, which comprises a shell, an impact component, an aluminum foil film, a sealing ring and a fire-fighting pipeline, wherein the impact component comprises an impact slider and an impact needle, a plurality of evenly distributed water flow grooves are provided in the middle and upper part of the side surface of the shell, a plurality of evenly distributed elastic keys and pressure relief holes are provided in the lower part of the side surface of the shell, a temporary water tank is provided at the top of the shell, a water tank annular hole is provided in the middle of the temporary water tank, a keyway is provided in the middle of the impact slider, the impact slider is placed in the shell, the elastic key is disassembled and installed in the keyway, the impact needle is fixedly connected to the impact slider, and the impact needle is placed in the circular hole of the water tank; the sealing ring covers the outer edge of the aluminum foil film, the bottom of the fire-fighting pipeline is fixedly connected to the top of the shell, the aluminum foil film is placed between the top of the shell and the bottom of the fire-fighting pipeline, and the impact needle is located below the aluminum foil film.

[0007] Preferably, three evenly distributed connecting mortises are provided on the top edge of the shell, three evenly distributed positioning holes are provided on the edge of the aluminum foil membrane, and three evenly distributed connecting tenons are provided on the bottom of the fire-fighting pipeline, and the connecting tenons pass through the positioning holes and are connected to the connecting mortises.

[0008] Preferably, the impact needle is arrow-shaped.

[0009] Preferably, a circular groove matching and engaging with the circular hole of the water tank is provided on the top of the impact sliding block.

[0010] Preferably, there are three elastic keys.

[0011] Preferably, three pressure relief holes are provided.

[0012] Preferably, the water flow troughs are provided in two rows, upper and lower, with three troughs in each row.

[0013] Preferably, the distance between the top of the impact needle and the aluminum foil film is 2.5 mm.

[0014] Preferably, the aluminum foil film has a thickness of 0.05 mm.

[0015] The utility model has the following technical effects:

[0016] 1. The impact slider is limited by the elastic key engaging the key slot. When the lower air pressure is too high, the key slot will be disengaged from the elastic key, and the impact slider will drive the impact needle to move upward, piercing the aluminum foil film, so that the fire water in the fire pipeline will flow down, achieving the purpose of fire fighting efficiently.

[0017] 2. Through the pressure relief hole, the air pressure can be released from the hole after the impact needle is impacted, avoiding being opposite to the direction of water flow;

[0018] 3. The water flow direction is guided by the water flow trough. After the fire water flows to the temporary water tank, the impact slider closes the bottom, and the water flows out through the water flow trough, and then flows down to the thermal runaway battery cell for precise fire fighting;

[0019] 4. The impact needle is arrow-shaped to ensure that after piercing the aluminum foil, the hole formed is larger, allowing water to flow out smoothly;

[0020] 5. The circular groove on the impact slider is engaged with the circular hole of the water tank to ensure that the impact slider and the impact needle will not be washed out of the device by the water flow or squeezed into the fire-fighting pipeline by air pressure to cause blockage.

[0021] 6. The thickness of the aluminum foil film is 0.05mm, which ensures that under the force of air pressure, the impact needle can quickly break the aluminum foil film, making the device respond efficiently and sensitively. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a lithium battery cell-level fire-fighting device;

[0023] Figure 2 A schematic diagram of the fire protection pipeline structure of a lithium battery cell-level fire protection device;

[0024] Figure 3 A schematic diagram of the impact assembly structure of a lithium battery cell-level fire-fighting device

[0025] Figure 4 This is a schematic diagram of the shell structure of a lithium battery cell-level fire-fighting device;

[0026] Figure 5 This is a schematic diagram of the aluminum foil membrane structure of a lithium battery cell-level fire-fighting device.

[0027] In the figure: 1. shell; 2. impact slider; 3. impact needle; 4. aluminum foil; 5. sealing ring; 6. fire-fighting pipeline; 7. water flow trough; 8. elastic key; 9. pressure relief hole; 10. temporary water tank; 11. circular ring hole of water tank; 12. keyway; 13. connecting mortise; 14. positioning hole; 15. connecting tenon; 16. circular ring groove. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described in detail below with reference to the accompanying drawings.

[0029] In the description of the present invention, it is necessary to understand that the terms "upper", "bottom", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] like Figure 1 As shown, a lithium battery cell-level fire-fighting device comprises a shell 1, an impact assembly, an aluminum foil film 4, a sealing ring 5 and a fire-fighting pipeline 6, wherein the impact assembly comprises an impact slider 2 and an impact needle 3, a plurality of evenly distributed water flow grooves 7 are provided in the middle and upper part of the side of the shell 1, a plurality of evenly distributed elastic keys 8 and a pressure relief hole 9 are provided in the lower part of the side of the shell 1, a temporary water tank 10 is provided on the top of the shell 1, a water tank circular ring hole 11 is provided in the middle of the temporary water tank 10, a keyway 12 is provided in the middle of the impact slider 2, the impact slider 2 is placed in the shell 1, the elastic key 8 is disassembled and installed in the keyway 12, the impact needle 3 is fixedly connected to the impact slider 2, and the impact needle 3 is placed in the water tank circular hole; the sealing ring 5 covers the outer edge of the aluminum foil film 4, the bottom of the fire-fighting pipeline 6 is fixedly connected to the top of the shell 1, the aluminum foil film 4 is placed between the top of the shell 1 and the bottom of the fire-fighting pipeline 6, and the impact needle 3 is located below the aluminum foil film 4. The impact slider 2 is limited by the elastic key 8 engaging the key slot 12. When the air pressure at the bottom is too high, the key slot 12 is disengaged from the elastic key, and the impact slider 2 drives the impact needle 3 to move upward, piercing the aluminum foil film 4, so that the fire water in the fire pipe 6 flows down. The pressure relief hole 9 allows the air pressure to be released from the hole after the impact needle 3 is impacted, avoiding the direction opposite to the water flow. The water flow direction is guided by the water flow trough 7. After the fire water flows to the temporary water tank 10, the water flows out through the water flow trough 7 because the impact slider 2 closes the bottom, and then flows downward to the thermal runaway battery cell for precise fire fighting.

[0031] like Figure 2 , Figure 4 , Figure 5 As shown, the top edge of the housing 1 is provided with three evenly distributed connection mortises 13, the edge of the aluminum foil film 4 is provided with three evenly distributed positioning holes 14, and the bottom of the fire-fighting pipeline 6 is provided with three evenly distributed connection tenons 15, and the connection tenons 15 pass through the positioning holes 14 and are connected to the connection mortises 13. The aluminum foil film 4 is fixed between the fire-fighting pipeline 6 and the housing 1 to isolate the fire-fighting water from flowing downward. When the aluminum foil film 4 is punctured by the impact needle 3, the fire-fighting water in the fire-fighting pipeline 6 can flow into the housing 1 and flow out from the water flow trough 7 to accurately extinguish the thermal runaway battery cell.

[0032] like Figure 3 As shown, the impact needle 3 is arrow-shaped. The impact needle 3 is arrow-shaped to ensure that after piercing the aluminum foil film 4, the hole formed is larger, allowing water to flow out smoothly.

[0033] The top of the impact slider 2 is provided with an annular groove 16 that matches and engages with the water tank annular hole 11. It is ensured that the impact slider 2 and the impact needle 3 will not be washed out of the device by the water flow or squeezed into the fire-fighting pipeline 6 by air pressure to cause blockage.

[0034] The elastic keys 8 are provided with three keys. The elastic keys 8 engage with the key slots 12 to limit the impact slider 2.

[0035] There are three pressure relief holes 9. Through the pressure relief holes 9, the air pressure can be released from the hole after the impact needle 3 is impacted, avoiding being opposite to the water flow direction, making the fire water flow easier to flow out, and improving the fire fighting efficiency.

[0036] The water flow troughs 7 are provided in two rows, one above the other, with three in each row. The water flow direction is guided by the water flow troughs 7. After the fire water flows to the temporary water tank 10, the impact slider 2 closes the bottom, and the water flows through multiple water flow troughs 7 to the surrounding thermal runaway cells, so as to accurately extinguish the thermal runaway cells.

[0037] The distance between the top of the impact needle 3 and the aluminum foil film 4 is 2.5 mm, which ensures that the impact needle 3 will not easily pierce the aluminum foil film 4 during transportation. After the impact, the impact needle 3 breaks through the aluminum foil film 4 by 3.5 mm, so that the opening of the aluminum foil film 4 is larger, and the fire water can easily flow out.

[0038] The thickness of the aluminum foil film 4 is 0.05 mm, which ensures that the impact needle 3 can quickly break the aluminum foil film 4 under the force of air pressure, making the device highly efficient and sensitive.

[0039] A method for using a lithium battery cell-level fire-fighting device is as follows:

[0040] The lithium battery cell-level fire-fighting device of the present design is installed above the cell safety valve of the water channel integrated cover plate arranged above the battery pack. When the battery has thermal runaway, the cell safety valve explodes, generating strong air pressure, so that the impact slider 2 rushes out of the restraint of the elastic key 8 and drives the impact needle 3 to move upward, piercing the aluminum foil film 4, so that the aluminum foil film 4 forms a hole, allowing the fire water in the fire pipe 6 to flow down; the water flow direction is guided by the water flow trough 7, and after the fire water flows to the temporary water tank 10, the impact slider 2 closes the bottom, and the water flows out through the water flow trough 7, and then flows downward to the thermal runaway cell, so as to achieve precise fire fighting; the pressure relief hole 9 allows the air pressure to be released from the hole after the impact needle 3 is impacted, and can avoid being opposite to the water flow direction; and the annular groove 16 on the impact slider 2 is engaged with the annular hole 11 of the water tank to ensure that the impact slider 2 and the impact needle 3 will not be rushed out of the device by the water flow or squeezed into the fire pipe 6 by the air pressure to cause blockage.

[0041] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A lithium battery cell-level fire-fighting device, characterized in that: It includes an outer shell, an impact component, an aluminum foil film, a sealing ring and a fire-fighting pipeline. The impact component includes an impact slider and an impact needle. A plurality of evenly distributed water flow grooves are provided in the middle and upper part of the side of the outer shell, a plurality of evenly distributed elastic keys and pressure relief holes are provided in the lower part of the side of the outer shell, a temporary water tank is provided on the top of the outer shell, a water tank circular ring hole is provided in the middle of the temporary water tank, a keyway is provided in the middle of the impact slider, the impact slider is placed in the outer shell, the elastic key is disassembled and installed in the keyway, the impact needle is fixedly connected to the impact slider, and the impact needle is placed in the circular hole of the water tank; the sealing ring covers the outer edge of the aluminum foil film, the bottom of the fire-fighting pipeline is fixedly connected to the top of the outer shell, the aluminum foil film is placed between the top of the outer shell and the bottom of the fire-fighting pipeline, and the impact needle is located below the aluminum foil film.

2. A lithium battery cell-level fire-fighting device according to claim 1, characterized in that: The top edge of the shell is provided with three evenly distributed connection mortises, the edge of the aluminum foil film is provided with three evenly distributed positioning holes, and the bottom of the fire-fighting pipeline is provided with three evenly distributed connection tenons, and the connection tenons pass through the positioning holes and are connected to the connection mortises.

3. A lithium battery cell-level fire-fighting device according to claim 1, characterized in that: The impact needle is in the shape of an arrow.

4. A lithium battery cell-level fire-fighting device according to claim 1, characterized in that: A circular groove matching and engaging with the circular hole of the water tank is arranged on the top of the impact sliding block.

5. A lithium battery cell-level fire-fighting device according to claim 1, characterized in that: There are three elastic keys.

6. A lithium battery cell-level fire-fighting device according to claim 1, characterized in that: The pressure relief holes are provided with three.

7. A lithium battery cell-level fire-fighting device according to claim 1, characterized in that: The water flow troughs are arranged in two rows, upper and lower, with three troughs in each row.

8. A lithium battery cell-level fire-fighting device according to claim 1, characterized in that: The distance between the top of the impact needle and the aluminum foil film is 2.5 mm.

9. A lithium battery cell-level fire-fighting device according to claim 1, characterized in that: The thickness of the aluminum foil film is 0.05 mm.

Images