Water injection valve for battery pack

Abstract

The utility model relates to the technical field of electric device valves, in particular to a water injection valve for a battery pack, which comprises an outer frame body mounted on the battery pack, a water passing opening is formed in the outer frame body, a blocking piece is mounted at the water passing opening, a top stop column is connected to the lower part of the blocking piece in an abutting manner, and the top stop column is connected with the outer frame body in a sliding manner. According to the electric device valve, when a fire occurs, the water pressure is higher than that of a traditional valve, and fire can be extinguished more quickly.

Description

Technical Field

[0001] The present application relates to the technical field of electrical device valves, and in particular to a water filling valve for a battery pack. Background Art

[0002] Batteries are ubiquitous in our daily lives. Essentially, a battery is a device that converts stored chemical energy into electrical energy. Essentially, a battery is a small chemical reactor that generates high-energy electrons through reactions and transmits them to external devices. Energy storage power stations in the new energy industry utilize a large number of batteries. Lithium-ion battery cells are susceptible to thermal runaway accidents caused by various internal or external factors, and battery fires are an unavoidable problem.

[0003] The common method for extinguishing battery fires is to use instruments such as smoke sensors or temperature sensors. After sensing a fire, they puncture the water-isolating membrane and allow the fire-fighting liquid that was previously blocked by the water-isolating membrane to flow into the battery pack, thereby extinguishing the fire. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, one of the purposes of this application is to provide a water filling valve for a battery pack that can quickly extinguish fire.

[0005] The above-mentioned application objectives of this application are achieved through the following technical solutions:

[0006] A water filling valve for a battery pack includes an outer frame installed on the battery pack, a water outlet is formed on the outer frame, a barrier is installed on the water outlet, a top stop column is abutted and connected below the barrier, and the top stop column is slidably connected to the outer frame.

[0007] Furthermore, a driving member is fixedly mounted on the outer frame, an output end of the driving member is connected to a connecting rod, and the connecting rod is connected to the stop column.

[0008] Furthermore, the barrier is rotatably connected to the outer frame.

[0009] Furthermore, a seal is installed on the outer frame at the position of the water outlet, and the seal includes a connecting column and a sealing platform. The connecting column passes through the water outlet, and the sealing platform is located at one end of the connecting column, and the sealing platform is connected to the outer frame.

[0010] Furthermore, the connecting column has an external thread on one side passing through the water outlet.

[0011] Furthermore, two sides of the sealing platform respectively contact the barrier and the outer frame.

[0012] Furthermore, sealing rings are provided at positions where the sealing platform contacts the barrier and the outer frame.

[0013] Furthermore, one side of the outer frame body is provided with a mounting seat, and the mounting seat includes a supporting platform and a plurality of mounting columns. The supporting platform abuts against the stop columns, and the supporting platform is connected to the outer frame body through the mounting columns.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] 1. When the battery pack catches fire, the smoke sensor senses that the smoke concentration exceeds the standard, transmits a signal to slide the top stop column, the barrier opens, and the external fire-fighting fluid flows in to extinguish the fire;

[0016] 2. The barrier can be made of rigid materials such as metal or wood, so that during normal operation, the water pressure at the water outlet is greater than that of ordinary water-blocking membranes. After the alarm is triggered, a larger amount of fire-fighting liquid can flow in at the same time, thereby achieving faster fire extinguishing.

[0017] 3. By setting up a mounting seat, the supporting platform of the mounting seat supports the top stop column, thereby reducing the bending moment of the linkage rod when the barrier is not opened, thereby increasing the service life of the entire valve;

[0018] 4. The edges of both ends of the top stop column are treated with arc guide surfaces to reduce the wear of the top stop column during sliding and increase the service life of the entire valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a water filling valve for a battery pack disclosed in the utility model;

[0020] Figure 2 This is a top view of an embodiment of a water filling valve for a battery pack disclosed in the utility model;

[0021] Figure 3 yes Figure 2 Cross-sectional view of AA;

[0022] Figure 4 yes Figure 3 A partial enlarged schematic diagram of part B.

[0023] In the figure, 01, battery pack; 1, outer frame; 11, water outlet; 12, fixing plate; 13, rotating ear; 2, barrier; 3, top stop column; 4, driving member; 41, connecting rod; 5, sealing member; 51, connecting column; 52, sealing platform; 53, sealing ring; 6, mounting seat; 61, supporting platform; 62, mounting column. DETAILED DESCRIPTION

[0024] The present application is further described in detail below with reference to the accompanying drawings.

[0025] Reference Figure 1 , is a water filling valve for a battery pack disclosed in this application, including an outer frame 1 installed on the battery pack 01, a smoke sensor installed in the outer frame 1, a water outlet 11 is opened on the outer frame 1, the water outlet 11 is used to pass the fire extinguishing liquid, the water outlet 11 is installed with a barrier member 2, and a top stop column 3 is connected to the bottom of the barrier member 2, and the top stop column 3 is slidably connected to the outer frame 1.

[0026] When the battery pack 01 catches fire, the smoke sensor senses that the smoke concentration exceeds the standard, transmits a signal to slide the top stop column 3, the barrier 2 opens, and the external fire-fighting fluid flows in to extinguish the fire.

[0027] It should be understood that the barrier 2 here can be made of a rigid rust-proof material such as aluminum alloy or other rust-proof metals, so that during normal operation, the water pressure at the water outlet 11 is greater than that of an ordinary water-proof membrane. After the alarm is triggered, a larger amount of fire-fighting fluid can flow in at the same time, thereby achieving faster fire extinguishing. After the material and water pressure adjustment test, the battery pack is filled with liquid within 30 seconds to achieve fire extinguishing. In the actual production process, once individual lithium battery cells catch fire, they will quickly spread to the surrounding battery cells, causing a large area of ​​electrochemical fire. Due to the large combustion energy, it is difficult to extinguish the fire. Therefore, when a single battery cell catches fire, the core means to control the spread of the fire is to use the fastest liquid injection to cool down the fire. Even if individual battery cells have thermal runaway fires, they can be filled with liquid to cool down within 30 seconds and extinguish the fire in time.

[0028] Regarding the sliding movement of the stop post 3, the outer frame 1 is fixedly connected to a fixing plate 12 on the side facing the battery pack 01. A driver 4 is fixedly mounted on the sidewall of the fixing plate 12. The output end of the driver 4 is connected to a connecting rod 41, which is connected to the stop post 3. The driver 4 can be a motor, air cylinder, or oil cylinder, and its opening and closing are controlled by a smoke sensor.

[0029] Specifically but not limiting, the battery collection boxes are all located inside the outer frame 1, and the wiring harness of the driving component 4 is connected to the outside through the side wall of the outer frame 1, thereby making the battery pack as a whole more flat and beautiful, while reducing accidental damage or wear caused by the wiring harness being located above the battery pack during normal operation.

[0030] Specifically, but not exclusively, the fixing plate 12 is provided with a rotating ear 13 located at the position of the barrier 2. The barrier 2 is rotatably connected to the outer frame 1 via the rotating ear 13. When the stop post 3 slides, the barrier 2 can rotate about the rotating ear 13 to open the water inlet 11. This prevents the barrier 2 from falling and thus affecting fire extinguishing. Furthermore, after the fire is extinguished and the staff has finished handling the burning battery cells, the barrier 2 can be easily repositioned.

[0031] To facilitate communication between the water outlet 11 and the external fire-fighting fluid, in this embodiment, a seal 5 is installed on the outer frame 1 at the water outlet 11. This seal 5 comprises a connecting post 51 and a sealing platform 52. The connecting post 51 extends through the water outlet 11, and the sealing platform 52 is located at one end of the connecting post 51 and is connected to the outer frame 1. The side of the connecting post 51 that extends through the water outlet 11 is externally threaded to facilitate communication with an external water pipe. Furthermore, the two sides of the sealing platform 52 contact the barrier 2 and the outer frame 1, respectively, to provide a sealing effect.

[0032] In order to further improve the sealing effect, sealing rings 53 may be provided at the positions where the sealing platform 52 contacts the barrier 2 and the outer frame 1 .

[0033] One side of the outer frame 1 further includes a mounting base 6, which includes a support platform 61 and a plurality of mounting posts 62. The support platform 61 abuts against the stop posts 3 and is connected to the outer frame 1 via the mounting posts 62. The support platform 61 supports the stop posts 3, thereby reducing the bending moment to which the linkage rod 41 is subjected when the barrier 2 is not opened, thereby increasing the service life of the entire valve.

[0034] At the same time, the edges of both ends of the top stop column 3 can be treated with arc guide surfaces to reduce the wear of the top stop column 3 during sliding, thereby increasing the service life of the entire valve.

[0035] The implementation principle of this embodiment is: when the battery pack 01 catches fire, the smoke sensor senses that the smoke concentration exceeds the standard, transmits a signal to start the driving member 4, and the driving member 4 slides the top stop column 3 through the connecting rod 41, and the barrier member 2 opens around the rotating ear 13, and the external fire-fighting fluid flows in to extinguish the fire.

[0036] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A water filling valve for a battery pack, comprising an outer frame (1) mounted on a battery pack (01), characterized in that: The outer frame (1) is provided with a water outlet (11), the water outlet (11) is provided with a barrier (2), a stop column (3) is abutted and connected below the barrier (2), and the stop column (3) is slidably connected to the outer frame (1).

2. A water filling valve for a battery pack according to claim 1, characterized in that: The outer frame (1) is fixedly mounted with a driving member (4), an output end of the driving member (4) is connected to a connecting rod (41), and the connecting rod (41) is connected to the top stop column (3).

3. The water filling valve for a battery pack according to claim 1, characterized in that: The barrier member (2) is rotatably connected to the outer frame (1).

4. The water filling valve for a battery pack according to claim 1, characterized in that: The outer frame (1) is provided with a sealing member (5) at a position of the water outlet (11). The sealing member (5) comprises a connecting column (51) and a sealing platform (52). The connecting column (51) passes through the water outlet (11). The sealing platform (52) is located at one end of the connecting column (51). The sealing platform (52) is connected to the outer frame (1).

5. The water filling valve for a battery pack according to claim 4, characterized in that: One side of the connecting column (51) passing through the water outlet (11) is provided with an external thread.

6. The water filling valve for a battery pack according to claim 4, characterized in that: Both sides of the sealing platform (52) respectively contact the barrier (2) and the outer frame (1).

7. The water filling valve for a battery pack according to claim 6, characterized in that: Sealing rings (53) are provided at positions where the sealing platform (52) contacts the barrier (2) and the outer frame (1).

8. A water filling valve for a battery pack according to any one of claims 1 to 7, characterized in that: One side of the outer frame (1) further comprises a mounting seat (6), the mounting seat (6) comprising a supporting platform (61) and a plurality of mounting columns (62), the supporting platform (61) abuts against the stop column (3), and the supporting platform (61) is connected to the outer frame (1) via the mounting columns (62).

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