An explosion-proof valve scored inwardly of the top cover

Abstract

The utility model discloses a kind of top cover of score of explosion-proof valve inward, including top cover sheet and the positive pole post assembly, negative pole post assembly and explosion-proof valve assembly set on top cover sheet, the structure of improved explosion-proof valve sheet in the present scheme, the forming of concave groove one at top surface makes the forming boss one at explosion-proof valve sheet bottom end surface, the forming boss two at the bottom wall of concave groove one is made by the forming of concave groove two, score is at the bottom end surface of boss one and extend around concave groove two, explosion-proof valve sheet can be more accurately opened according to predetermined parameter under this configuration, reduce the risk of battery.

Description

Technical Field

[0001] This utility model relates to the field of battery device technology, specifically to a top cover with inward-facing grooves on an explosion-proof valve. Background Technology

[0002] Batteries are a crucial component of new energy vehicles, and the battery casing structure, as a vital part of the battery, significantly impacts battery safety. To improve safety, a vent valve is typically installed on the top cover of the battery casing. When the internal pressure exceeds a set value, the vent valve bursts to release pressure. However, the design of this vent valve is flawed; it requires a significant pressure increase before bursting, posing a safety hazard and requiring improvement. Utility Model Content

[0003] To address at least one of the aforementioned technical deficiencies, this utility model provides the following technical solution:

[0004] This application discloses an explosion-proof valve with an inwardly grooved top cover, including a top cover plate and a positive terminal assembly, a negative terminal assembly, and an explosion-proof valve assembly disposed on the top cover plate. The explosion-proof valve assembly is located between the positive terminal assembly and the negative terminal assembly and is disposed at a mounting hole formed on the top cover plate. The explosion-proof valve assembly includes an explosion-proof valve diaphragm and an explosion-proof valve plate disposed vertically. A groove is formed inwardly at the middle of the top surface of the explosion-proof valve plate, and a protrusion is formed at the bottom surface of the corresponding groove. A second groove is formed inwardly at the middle of the bottom end surface of the first protrusion, and a second protrusion is formed at the bottom wall of the corresponding groove. A groove for blasting is provided at the bottom end surface of the first protrusion, and the groove extends around the second groove.

[0005] In this solution, the structure of the explosion-proof valve plate is improved. The molding of the first groove on the top surface forms a convex bulge at the bottom end of the explosion-proof valve plate, and the molding of the second groove forms a convex bulge at the bottom wall of the first groove. The engraving is located at the bottom end of the convex bulge and extends around the second groove. With this configuration, the explosion-proof valve plate can be opened more accurately according to the predetermined parameters after testing, reducing the risk of battery damage.

[0006] Furthermore, the spacing between the beginning and end of the grooves, an optimized design, helps to further improve the performance of the explosion-proof valve plate, enabling it to open accurately according to predetermined parameters.

[0007] Furthermore, both the positive and negative electrode assembly include an upper plastic part, a sealing part, and an electrode post. The top cover plate has a second mounting hole, and a riveting part is provided at the end face of the second mounting hole. The upper plastic part is fixed on the electrode post, and the upper plastic part fills the gap between the riveting part and the electrode post to fix the electrode post to the top cover plate. The sealing part is located below the upper plastic part and is sleeved on the electrode post. The peripheral wall of the sealing part abuts against the wall of the second mounting hole. The riveting part fixes the upper plastic part and the electrode post together, and the sealing part plays a sealing role.

[0008] Furthermore, it also includes a connecting piece, which is connected to the bottom of the pole post for easy external connection.

[0009] Furthermore, the riveting part is arranged in a ring shape at the end face of the second mounting hole. The upper part of the riveting part is bent inward to form a second riveting part. The second riveting part abuts against the upper plastic part. For example, during assembly, the pole and the upper plastic part are placed in the second mounting hole, and the riveting part is pressed to bend its upper part to form the second riveting part. Under the pressure of the second riveting part, the upper plastic part and the pole are fixed at the second mounting hole.

[0010] Furthermore, the pole includes a pole body and a pole positioning part that protrudes radially from the circumferential wall at the middle of the pole body. A cavity is provided in the cavity wall of the upper plastic part to accommodate the pole positioning part, which helps to improve the stability of the structure.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. The structure of the explosion-proof valve plate designed in this utility model, with groove one and groove two cooperating with the bottom end face engraving two surrounding the configuration, helps the explosion-proof valve plate to open accurately according to the predetermined parameters, reducing the risk to the battery. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of the top cover in Embodiment 1;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the top cover in Embodiment 1;

[0016] Figure 3 This is a schematic diagram of the explosion-proof valve plate from a top-down view.

[0017] Figure 4 This is a structural schematic diagram of the explosion-proof valve plate viewed from below.

[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of the explosion-proof valve plate;

[0019] The attached figures are labeled as follows:

[0020] 1. Top cover plate; 2. Positive terminal assembly; 3. Negative terminal assembly; 4. Explosion-proof valve assembly; 21. Terminal; 22. Upper plastic part; 23. Sealing part; 24. Connecting piece; 41. Explosion-proof valve diaphragm; 42. Explosion-proof valve plate; 100. Riveting part; 101. Second riveting part; 211. Terminal body; 212. Terminal positioning part; 421. Groove one; 422. Protrusion two; 423. Protrusion one; 424. Groove two; 425. Score. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] like Figures 1-5 As shown, in this example, an explosion-proof valve with an inwardly grooved top cover includes a top cover plate 1 and a positive terminal assembly 2, a negative terminal assembly 3, and an explosion-proof valve assembly 4 mounted on the top cover plate 1. The explosion-proof valve assembly 4 is located between the positive terminal assembly 2 and the negative terminal assembly 3. The explosion-proof valve assembly 4 is installed in a mounting hole formed on the top cover plate 1. Mounting holes 2 are formed on both sides of the top cover plate 1, and the positive terminal assembly 2 and the negative terminal assembly 3 are installed in the corresponding mounting holes 2.

[0024] The explosion-proof valve assembly 4 includes an explosion-proof valve diaphragm 41 and an explosion-proof valve plate 42 arranged vertically. Figure 2 As shown, the explosion-proof valve diaphragm 41 is fixed at the opening of mounting hole one, and the explosion-proof valve plate 42 is located below the explosion-proof valve diaphragm 41. Figures 3-5 As shown, in this example, the top surface of the elliptical explosion-proof valve plate 42 has a recessed groove 421 formed in the middle. Corresponding to the recessed groove 421, the bottom surface of the explosion-proof valve plate 42 has a protruding bulge 423. The bottom end face of the protruding bulge 423 has a recessed groove 424 formed in the middle, and the bottom wall of the corresponding recessed groove 421 has a protruding bulge 422. The recessed grooves 421 and 424 are elliptical in shape. In this example, a notch 425 for blasting is formed on the bottom end face of the protruding bulge 423. The notch 425 extends around the recessed groove 424 in an elliptical shape. Preferably, the first and last ends of the notch 425 are spaced apart, i.e., not connected. This configuration of the explosion-proof valve plate has been tested and can accurately open according to predetermined parameters. For example, when the battery pressure reaches a predetermined value, the explosion-proof valve plate bursts open to release gas.

[0025] In this example, both the positive terminal assembly 2 and the negative terminal assembly 3 include an upper plastic part 22, a sealing part 23, and a terminal 21, such as Figure 2As shown, mounting hole two is formed on top cover plate 1. A riveting part 100 is formed protruding from the end face of the opening of mounting hole two. The riveting part 100 extends around the opening in a ring shape. The upper plastic part 22 is fixed on the pole post 21. If it is injection molded on the pole post, the upper plastic part fills the gap between the riveting part 100 and the pole post 21 to fix the pole post to the top cover plate. During assembly, if the pole post and the upper plastic part are placed in the mounting hole two, the riveting part is stamped to bend its upper part to form a second riveting part 101. Under the pressure of the second riveting part 101, the upper plastic part and the pole post are fixed at the mounting hole two.

[0026] To improve structural stability, in this example, the pole post 21 includes a pole post body 211 and a pole post positioning part 212 that protrudes radially from the peripheral wall of the pole post body 211. The pole post body is like a common column, and the pole post positioning part is like a ring. The upper plastic part 22 has a cavity formed in the cavity wall. When the upper plastic part 22 is injection molded, the pole post positioning part 212 is in the cavity, which helps to improve the stability of the connection between the upper plastic part and the pole post.

[0027] In this example, the seal 23 is located below the upper plastic part 22 and is fitted onto the pole post 21. The seal is like a common sealing ring, and the peripheral wall of the seal abuts against the wall of the mounting hole 2 to achieve a sealing effect.

[0028] It also includes a connecting piece 24, which is connected to the bottom of the pole post 21 for easy external connection.

[0029] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A top cover with inwardly grooved grooves for an explosion-proof valve, comprising a top cover plate (1) and a positive terminal assembly (2), a negative terminal assembly (3), and an explosion-proof valve assembly (4) disposed on the top cover plate, wherein the explosion-proof valve assembly (4) is located between the positive terminal assembly (2) and the negative terminal assembly (3) and is disposed at a mounting hole formed on the top cover plate, characterized in that, The explosion-proof valve assembly (4) includes an explosion-proof valve membrane (41) and an explosion-proof valve plate (42) arranged vertically. The explosion-proof valve plate (42) has a recessed groove (421) formed in the middle of its top surface and a convex bulge (423) formed on the bottom surface of the corresponding explosion-proof valve plate. The convex bulge has a recessed groove (424) formed in the middle of its bottom end surface and a convex bulge (422) formed on the bottom wall of the corresponding explosion-proof valve plate groove. The convex bulge (423) has a blasting mark (425) on its bottom end surface and the blasting mark extends around the groove (424).

2. The explosion-proof valve top cover with inwardly grooved notches as described in claim 1, characterized in that: The first and last ends of the groove (425) are spaced apart.

3. The explosion-proof valve top cover with inwardly grooved notches as described in claim 1, characterized in that: The positive terminal assembly (2) and the negative terminal assembly (3) both include an upper plastic part (22), a sealing part (23), and a terminal post (21). The top cover plate (1) is provided with a second mounting hole and a riveting part (100) is provided at the end face of the second mounting hole. The upper plastic part (22) is fixed on the terminal post (21) and the upper plastic part fills the gap between the riveting part and the terminal post so that the terminal post is fixed to the top cover plate. The sealing part (23) is located below the upper plastic part (22) and is sleeved on the terminal post (21). The peripheral wall of the sealing part (23) abuts against the hole wall of the second mounting hole.

4. The explosion-proof valve top cover with inwardly grooved notches as described in claim 3, characterized in that: It also includes a connecting piece (24) which is connected to the bottom of the pole post (21).

5. The explosion-proof valve top cover with inwardly grooved notches as described in claim 3, characterized in that: The riveting part (100) is arranged in a ring shape at the end face of the hole of the second mounting hole. The upper part of the riveting part is bent inward to form a second riveting part (101), which abuts against the upper plastic part (22).

6. The explosion-proof valve top cover with inwardly grooved notches as described in claim 3, characterized in that: The pole post (21) includes a pole post body (211) and a pole post positioning part (212) that is radially protruding from the peripheral wall at the middle of the pole post body. A cavity is provided in the cavity wall of the upper plastic part (22) to accommodate the pole post positioning part (212).

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