Top cover structure of double-layer anti-explosion valve

Abstract

The utility model relates to the technical field of battery anti-explosion valves, in particular to a top cover structure of a double-layer anti-explosion valve, which comprises an outer shell, the outer shell comprises a shell body and a cover body, the cover body is provided with an anti-explosion valve, the cover body is in threaded connection with an anti-explosion cover, a lifter is slidably connected in the anti-explosion cover, and the lifter is connected with the anti-explosion valve. When the lifter moves in the direction away from the shell, a plurality of pressure relief channels are formed between the lifter and the anti-explosion cover. By means of the arranged anti-explosion cover, when the internal pressure of the shell is too high and rapid pressure relief needs to be conducted, the anti-explosion valve is broken, gas in the shell enters the position between the anti-explosion cover and the lifter and pushes the lifter to move in the direction away from the shell, the gas escapes and is exhausted out of the pressure relief channel, and the broken anti-explosion valve is limited by the lifter and the anti-explosion valve in a double-limiting mode. Therefore, potential safety hazards are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery explosion-proof valve technology, specifically to a top cover structure for a double-layer explosion-proof valve. Background Technology

[0002] An explosion-proof valve is a safety structure that prevents gas buildup inside the battery pack, allowing gas inside and outside the battery pack to circulate freely through a waterproof and breathable membrane, maintaining internal and external pressure balance. When the internal pressure of the battery pack reaches the burst point, it automatically breaks open to release pressure, preventing the battery pack from bursting due to excessive internal pressure.

[0003] However, traditional explosion-proof valves are prone to rupture and pressure release when the internal pressure of the battery rises sharply, which can cause safety hazards and damage to people and other objects in the vicinity, resulting in low safety. Utility Model Content

[0004] The purpose of this invention is to provide a top cover structure for a double-layer explosion-proof valve to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A top cover structure for a double-layer explosion-proof valve includes an outer shell, the outer shell comprising a housing and a cover body, an explosion-proof valve being disposed on the cover body, an explosion-proof cover being threadedly connected to the cover body, and a lifting device being slidably connected inside the explosion-proof cover. When the lifting device moves away from the outer shell, multiple pressure relief channels are formed between the lifting device and the explosion-proof cover.

[0007] Furthermore, the explosion-proof cover has multiple explosion-proof holes arranged in a ring on the explosion-proof cover, and the lifting device is slidably connected to each explosion-proof hole.

[0008] Furthermore, the lifting device includes multiple sliding plates slidably connected within the explosion-proof holes, with the other end of each sliding plate fixedly connected to the lifting plate.

[0009] Furthermore, a fixing plate is provided between adjacent sliding plates. The fixing plate is fixedly installed inside the explosion-proof cover. Each fixing plate, along with the adjacent sliding plate and the lifting plate, separates the interior of the explosion-proof cover to form a first cavity and a second cavity.

[0010] Furthermore, multiple baffles are respectively provided on the outer surface of the explosion-proof cover, and each baffle is provided in a one-to-one correspondence with the pressure relief channel.

[0011] In the above technical solution, the top cover structure of the double-layer explosion-proof valve provided by this utility model has the following beneficial effects:

[0012] With the explosion-proof cover in place, when the internal pressure of the shell is too high and rapid pressure relief is required, the explosion-proof valve ruptures, and the gas inside the shell enters between the explosion-proof cover and the lifting device, pushing the lifting device to move away from the shell. The gas escapes from the pressure relief channel. The ruptured explosion-proof valve is greatly reduced in terms of safety hazards due to the dual restriction of the lifting device and the explosion-proof valve.

[0013] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0014] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0017] Figure 2 This is a cross-sectional structural schematic diagram provided for an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the explosion-proof cover structure provided in an embodiment of the present utility model;

[0019] Figure 4 A schematic diagram of the lifting device structure provided for an embodiment of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 11. Shell; 12. Cover; 2. Explosion-proof cover; 21. First cavity; 22. Second cavity; 3. Lifter; 31. Sliding plate; 32. Lifting plate; 4. Explosion-proof hole; 5. Fixing plate; 6. Shielding plate. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0023] Please see Figure 1-4 A top cover structure for a double-layer explosion-proof valve includes an outer shell 1, the outer shell 1 including a housing 11 and a cover 12, an explosion-proof valve is provided on the cover 12, an explosion-proof cover 2 is threadedly connected to the cover 12, a lifting device 3 is slidably connected inside the explosion-proof cover 2, and when the lifting device 3 moves away from the outer shell 1, multiple pressure relief channels are formed between the lifting device 3 and the explosion-proof cover 2.

[0024] Furthermore, the explosion-proof cover 2 has multiple explosion-proof holes 4 arranged in a ring on the explosion-proof cover 2, and the lifting device 3 is slidably connected to each explosion-proof hole 4. When the lifting device 3 moves away from the outer casing 1, the explosion-proof holes 4 are exposed, forming a pressure relief channel for venting internal gas.

[0025] Furthermore, the lifting device 3 includes a plurality of sliding plates 31 slidably connected within the explosion-proof hole 4, and the other end of each sliding plate 31 is fixedly connected to the lifting plate 32.

[0026] Furthermore, a fixing plate 5 is provided between adjacent sliding plates 31. The fixing plate 5 is fixedly installed inside the explosion-proof cover 2. Each fixing plate 5, together with the adjacent sliding plate 31 and the lifting plate 32, separates the interior of the explosion-proof cover 2 to form a first cavity 21 and a second cavity 22. When the lifting device 3 is at its lowest point inside the explosion-proof cover 2, that is, closest to the outer shell 1, the fixing plate 5 abuts against the lifting plate 32.

[0027] When the pressure relief valve releases gas, the gas first enters the first chamber 21 for initial pressure relief and pushes the lifter 3 to move away from the outer casing 1, allowing the gas to be discharged. When the gas inside the outer casing 1 continues to be discharged, the gas can enter the second chamber 22, accelerating the gas release speed and further improving safety.

[0028] Furthermore, multiple baffles 6 are respectively provided on the outer surface of the explosion-proof cover 2, and each baffle 6 is correspondingly provided with a pressure relief channel to prevent external water from flowing back into the explosion-proof valve.

[0029] Working principle: When the pressure relief valve vents gas, the gas first enters the first chamber 21 for initial pressure relief and pushes the lifting device 3 to move away from the outer casing 1, allowing the gas to be discharged. When the gas inside the outer casing 1 continues to be discharged, the gas can enter the second chamber 22 to accelerate the gas release speed. In addition, the safety hazard is greatly reduced due to the dual restriction of the lifting device 3 and the explosion-proof valve.

[0030] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A top cover structure for a double-layer explosion-proof valve, comprising an outer shell (1), the outer shell (1) comprising a housing (11) and a cover (12), wherein an explosion-proof valve is disposed on the cover (12), characterized in that: An explosion-proof cover (2) is threaded onto the cover (12), and a lifter (3) is slidably connected inside the explosion-proof cover (2). When the lifter (3) moves away from the outer shell (1), multiple pressure relief channels are formed between the lifter (3) and the explosion-proof cover (2).

2. The top cover structure of a double-layer explosion-proof valve according to claim 1, characterized in that, The explosion-proof cover (2) has multiple explosion-proof holes (4), which are arranged in a ring on the explosion-proof cover (2). The lifting device (3) is slidably connected to each explosion-proof hole (4).

3. The top cover structure of a double-layer explosion-proof valve according to claim 2, characterized in that, The lifting device (3) includes multiple sliding plates (31) that are slidably connected in the explosion-proof hole (4), and the other end of each sliding plate (31) is fixedly connected to the lifting plate (32).

4. The top cover structure of a double-layer explosion-proof valve according to claim 3, characterized in that, A fixing plate (5) is provided between adjacent sliding plates (31). The fixing plate (5) is fixedly installed inside the explosion-proof cover (2). Each fixing plate (5) separates the interior of the explosion-proof cover (2) from the adjacent sliding plates (31) and the lifting plate (32) to form a first cavity (21) and a second cavity (22).

5. The top cover structure of a double-layer explosion-proof valve according to claim 1, characterized in that, Multiple baffles (6) are respectively provided on the outer surface of the explosion-proof cover (2), and each baffle (6) is provided in correspondence with the pressure relief channel.

Images