Power battery protection valve main body

Abstract

The utility model discloses a power battery protection valve main body in the field of valves, which comprises a gas release main body and a hollow valve pipe, the gas release main body comprises a base, a shell, a fixed column and an anti-explosion piece, the fixed column is arranged in the shell, the anti-explosion piece is arranged at the top of the base, a spring is arranged between the base and the shell, and the valve pipe is arranged in the shell. One end of the spring is connected with the bottom of the fixing column, the other end of the spring is connected with the top of the anti-explosion piece, the surface of the valve pipe is provided with a clamping groove which is concave inwards and used for achieving clamping, and one end of the valve pipe extends outwards to form an inserting pipe; according to the power battery protection valve body, the inward-concave clamping groove is formed in the surface of the valve pipe, and the positioning block and the arc-shaped block are arranged on the inserting pipe, so that stable clamping and fixing between the valve body and other components are achieved, the valve body can be installed in a clamping mode through direct sliding, and installation and disassembly are convenient.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically to the main body of a power battery protection valve. Background Technology

[0002] The power battery protection valve body is a crucial component of the electric vehicle's power battery system. Its primary function is to automatically open and release high-pressure gas when the internal pressure of the battery pack abnormally increases, protecting the battery system from damage and ensuring the safe operation of the electric vehicle. The valve body is connected to other components inside the power battery using screws and other fasteners, securing it to the battery. Traditional valve bodies typically consist of a venting body, valve tube, and explosion-proof plate. The venting body includes key components such as a base, outer shell, fixing post, and spring, while the valve tube is responsible for guiding and releasing the gas. The working principle of the power battery protection valve body is based on a pressure sensing and rapid response mechanism. Under normal circumstances, the valve body remains closed, the internal spring is extended, and the explosion-proof plate is in contact with the base to prevent gas leakage from the battery. When the internal pressure of the battery abnormally rises to a preset threshold, the explosion-proof plate generates an impact force due to the pressure, compressing the spring and separating the explosion-proof plate from the base. High-pressure gas is then rapidly released through the valve tube, reducing the internal pressure of the battery and preventing safety accidents such as battery explosions.

[0003] The existing power battery protection valve body still has the following defects:

[0004] The main body of the power battery protection valve is inconvenient to install and disassemble. The existing power battery protection valve bodies are often complex in design, and the installation and disassembly process requires professional tools and cumbersome steps. This not only increases maintenance costs but also affects maintenance efficiency. Especially in the daily maintenance and battery replacement of electric vehicles, the difficulty of disassembling and assembling the valve body has become a key factor restricting work efficiency. The valve body needs to rely on fasteners such as screws to install it. This method of installing the valve body with screws and other fasteners increases the complexity of operation and time costs, making it inconvenient to install and disassemble.

[0005] Furthermore, the sealing performance of the power battery protection valve body is poor. Sealing performance is a crucial indicator of the valve body's performance, directly impacting the safety and reliability of the battery system. However, existing valve bodies have shortcomings in their sealing design. For example, sealing solely through a vent plate directly between the valve body and the base leads to a decline in sealing performance over long-term use. Gas can easily escape through the gaps between the vent plate and the base, causing gas leaks. This not only reduces battery system performance but may also pose safety hazards. Especially after repeated pressure releases, the vent plate may experience wear and tear against the inner wall of the base, creating larger gaps and further exacerbating the poor sealing problem. Utility Model Content

[0006] In order to overcome the shortcomings of existing technical solutions, this utility model provides a power battery protection valve body, which can effectively solve the technical problems of inconvenient installation and disassembly of existing power battery protection valve bodies and poor sealing performance.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a power battery protection valve body, including a venting body and a hollow valve tube. The venting body includes a base, a shell, a fixing post, and an explosion-proof plate. The fixing post is disposed inside the shell, and the explosion-proof plate is disposed on the top of the base. A spring is disposed between the base and the shell. One end of the spring is connected to the bottom of the fixing post, and the other end of the spring is connected to the top of the explosion-proof plate. The surface of the valve tube is provided with an inwardly recessed locking groove for locking. One end of the valve tube extends outward to form a insertion tube. The surface of the insertion tube extends outward to form a positioning block for limiting and fixing. One end of the insertion tube extends... The spring extends to form a plug-in portion, and an arc-shaped block for engaging is provided on the surface near the plug-in portion. A sealing gasket is adhered to the bottom of the explosion-proof sheet. The inner wall of the base protrudes outward to form a protective ring that fits tightly with the sealing gasket. The inner wall of the base is recessed inward to form a circular groove, and a sealing ring is provided inside the circular groove. When the gas is not depressurized, the spring is in an extended state, and the sealing gasket fits tightly with the inner wall of the protective ring. The surface of the sealing ring fits tightly with the bottom of the sealing gasket. When the gas is depressurized, the spring is in a compressed state, and the sealing gasket and the protective ring separate. The gas is discharged from the valve pipe through the gap between the sealing gasket and the sealing ring, and the gas is discharged to the outside through the gap between the sealing gasket and the protective ring.

[0008] Furthermore, the positioning block is provided in two parts, which are symmetrically distributed. The symmetrical positioning blocks make it easier to achieve precise alignment during installation, simplifying the installation process and improving work efficiency.

[0009] Furthermore, the positioning block is trapezoidal in shape, which enables guidance and facilitates sliding engagement between the positioning block and other components inside the power battery.

[0010] Furthermore, the explosion-proof sheet is composed of one of stainless steel, aluminum alloy, graphite, and expanded polytetrafluoroethylene.

[0011] Furthermore, one end of the valve tube extends outward to form a connecting part. The surface of the connecting part is provided with external threads, and the interior of the base is provided with internal threads. The base and the connecting part are connected by threads, which realizes quick installation and disassembly between the venting body and the valve tube. The connection method is simple and quick, so that the valve body can be easily disassembled and reinstalled when it needs to be repaired or replaced, reducing maintenance costs and time costs.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The power battery protection valve body of this utility model achieves a stable engagement and fixation between the valve body and other components by setting an inwardly recessed engagement groove on the surface of the valve pipe, as well as a positioning block and arc-shaped block on the insertion pipe. The valve body can be installed by directly sliding and engaging, which is convenient for installation and disassembly. Through the combination of explosion-proof plate, sealing gasket and sealing ring, a tight seal can be maintained when the pressure is not released, preventing gas leakage. The tight fit between the sealing gasket and the protective ring, as well as the tight fit between the sealing ring and the bottom of the sealing gasket, provides double sealing protection and improves the sealing performance of the valve body. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main body of the power battery protection valve of this utility model;

[0014] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle;

[0015] Figure 3 This is a perspective view of the main body of the power battery protection valve of this utility model;

[0016] Figure 4 for Figure 3 Enlarged view of a section at point B in the middle;

[0017] Figure 5 This is an exploded view of the venting body of the power battery protection valve of this utility model;

[0018] Figure 6 for Figure 5 Enlarged view of a section at point C.

[0019] Numbering on the map:

[0020] 1-Ventilation body; 2-Valve pipe; 3-Clamping groove; 4-Plug-in pipe; 5-Positioning block; 6-Plug-in part; 7-Arc-shaped block; 8-Explosion-proof plate; 9-Protective ring; 10-Sealing ring; 11-Connecting part; 12-External thread; 13-Outer shell; 14-Base; 15-Spring; 16-Fixing post; 17-Circular groove; 18-Internal thread; 19-Sealing gasket. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1-6 As shown, the main body of the power battery protection valve includes a venting body 1 and a hollow valve tube 2. The venting body 1 includes a base 14, a shell 13, a fixing post 16, and an explosion-proof plate 8. The fixing post 16 is disposed inside the shell 13, and the explosion-proof plate 8 is disposed on the top of the base 14. A spring 15 is disposed between the base 14 and the shell 13. One end of the spring 15 is connected to the bottom of the fixing post 16, and the other end of the spring 15 is connected to the top of the explosion-proof plate 8. The surface of the valve tube 2 is provided with an inwardly recessed engaging groove 3 for locking. One end of the valve tube 2 extends outward to form a insertion tube 4. The surface of the insertion tube 4 extends outward to form a positioning block 5 for limiting and fixing. One end of the insertion tube 4 extends to form a plug-in portion 6, which is close to the plug-in portion 6. The surface of the connector 6 is provided with an arc-shaped block 7 for locking. A sealing gasket 19 is bonded to the bottom of the explosion-proof sheet 8. The inner wall of the base 14 protrudes outward to form a protective ring 9 that fits tightly with the sealing gasket 19. The inner wall of the base 14 is recessed inward to form a circular groove 17. A sealing ring 10 is provided inside the circular groove 17. When the gas is not depressurized, the spring 15 is in an extended state, and the sealing gasket 19 fits tightly with the inner wall of the protective ring 9. The surface of the sealing ring 10 fits tightly with the bottom of the sealing gasket 19. When the gas is depressurized, the spring 15 is in a compressed state, and the sealing gasket 19 and the protective ring 9 separate. The sealing gasket 19 and the sealing ring 10 separate, and the gas is discharged from the valve pipe 2 through the gap between the sealing gasket 19 and the sealing ring 10. The gas is discharged to the outside through the gap between the sealing gasket 19 and the protective ring 9.

[0023] Two positioning blocks 5 are provided, and the two positioning blocks 5 are symmetrically distributed. The symmetrical positioning blocks 5 make it easier to achieve precise alignment during installation, simplify the installation process, and improve work efficiency. The positioning blocks 5 are trapezoidal in shape, which can provide guidance and facilitate the sliding engagement of the positioning blocks 5 with other components inside the power battery. The explosion-proof sheet 8 is made of expanded polytetrafluoroethylene, which allows gas to be discharged smoothly while preventing dust and water from entering the battery, thereby ensuring the safety and stability of the battery.

[0024] One end of the valve pipe 2 extends outward to form a connecting part 11. The surface of the connecting part 11 is provided with an external thread 12, and the interior of the base 14 is provided with an internal thread 18. The base 14 and the connecting part 11 are connected by threads, which realizes quick installation and disassembly between the venting body 1 and the valve pipe 2. The connection method is simple and quick, so that the valve body can be easily disassembled and reinstalled when it needs to be repaired or replaced, reducing maintenance costs and time costs.

[0025] In this embodiment, the power battery protection valve body achieves a stable engagement and fixation between the valve body and other components by setting an inwardly recessed engagement groove 3 on the surface of the valve pipe 2, and a positioning block 5 and an arc-shaped block 7 on the insertion pipe 4. The valve body can be installed by directly sliding to engage, which is convenient for installation and disassembly. The combination of the explosion-proof plate 8, the sealing gasket 19 and the sealing ring 10 can maintain a tight seal when the pressure is not released, preventing gas leakage. The tight fit between the sealing gasket 19 and the protective ring 9, and the tight fit between the sealing ring 10 and the bottom of the sealing gasket 19, provide double sealing protection and improve the sealing performance of the valve body.

[0026] During installation, one end of the valve tube 2 is slid directly and inserted into the corresponding installation position of other components inside the power battery, so that the arc-shaped block 7 engages with other components, and the positioning block 5 is inserted into the groove inside the power battery. The protruding positions of other components are adapted to the engaging groove 3, thus installing the valve tube 2. After installing the valve tube 2, the venting body 1 is rotated through a threaded connection to connect the venting body 1 to the valve tube 2. During disassembly, the valve tube 2 can be pulled out directly. Compared with the traditional method of fixing with screws and other fasteners, the installation and disassembly process is simple, does not require professional tools and cumbersome steps, reduces the installation and disassembly time, and can be quickly installed and disassembled, greatly improving the efficiency of installation and disassembly.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A power battery protection valve body, comprising a venting body and a hollow valve pipe, wherein the venting body includes a base, a housing, a fixing post, and an explosion-proof plate, the fixing post being disposed inside the housing, the explosion-proof plate being disposed on the top of the base, a spring being disposed between the base and the housing, one end of the spring being connected to the bottom of the fixing post, and the other end of the spring being connected to the top of the explosion-proof plate, characterized in that: The valve tube has an inwardly recessed locking groove on its surface for engaging. One end of the valve tube extends outward to form a insertion tube. The surface of the insertion tube extends outward to form a positioning block for limiting and fixing. One end of the insertion tube extends to form a plug-in portion. An arc-shaped block for engaging is provided on the surface near the plug-in portion. A sealing gasket is adhered to the bottom of the explosion-proof sheet. The inner wall of the base protrudes outward to form a protective ring that fits tightly with the sealing gasket. The inner wall of the base is concave inward to form a circular groove. A sealing ring is provided inside the circular groove. When the gas is not depressurized, the spring is in an extended state, and the sealing gasket fits tightly with the inner wall of the protective ring. The surface of the sealing ring fits tightly with the bottom of the sealing gasket. When the gas is depressurized, the spring is in a compressed state, and the sealing gasket and the protective ring separate. The gas is discharged from the valve tube through the gap between the sealing gasket and the sealing ring, and the gas is discharged to the outside through the gap between the sealing gasket and the protective ring.

2. The power battery protection valve body according to claim 1, characterized in that: The positioning block consists of two blocks, which are symmetrically distributed between them.

3. The main body of the power battery protection valve according to claim 2, characterized in that: The positioning block is trapezoidal in shape.

4. The power battery protection valve body according to any one of claims 1-3, characterized in that: The explosion-proof sheet is made of one of stainless steel, aluminum alloy, graphite, and expanded polytetrafluoroethylene.

5. The power battery protection valve body according to any one of claims 1-3, characterized in that: One end of the valve tube extends outward to form a connecting part. The surface of the connecting part is provided with external threads, and the interior of the base is provided with internal threads. The base and the connecting part are connected by threads.

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