A battery top cover structure based on large torque

Abstract

The utility model discloses a kind of battery top cover structure based on big torque, comprising: cover plate, the both ends of the cover plate inside assembly have pole post;Plastic, set to the pole post outside, and the plastic lower surface is connected with cover plate, there is limit ring between the pole post and plastic;Wherein, the limit ring includes ring body and tooth block, the ring body is sleeved in the pole post outside, and the ring body lower surface is recessed and formed with second lug along circumferential direction, the tooth block is set to ring body inner wall to cooperate with pole post;The utility model is provided with ring body, second lug and tooth block, and the device can well limit pole post torsion by multiple tooth blocks, eliminate the risk of pole post rotation loosening from the source, improve firmness, especially suitable for high vibration, large current electric car's power battery application scene, guarantee the stability when using.

Description

Technical Field

[0001] This utility model specifically relates to a battery top cover structure based on high torque. Background Technology

[0002] The battery top cover is one of the core components of power lithium batteries, such as those used in electric vehicles. It is located on the top of the battery casing, and the terminals are conductive parts on the battery top cover, serving as the energy transmission hub between the internal and external circuits of the battery cell.

[0003] Existing battery top cover terminals are relatively simple, mostly fixed by injection molding, resulting in poor connection firmness. Some are fixed by laser welding, but high temperature may cause the plastic seals or sealing rings to age and fail. Others are fixed by riveting. During manufacturing, after the terminal passes through the top cover plate, the end of the terminal is cold-pressed by a mold to deform and lock the top cover plate. However, the contact area between the terminal and the surrounding plastic is small, making it easy to loosen due to vibration and poor anti-torsion effect. Therefore, we propose a battery top cover structure based on high torque. Utility Model Content

[0004] The purpose of this invention is to provide a battery top cover structure based on high torque to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a battery top cover structure based on high torque, comprising:

[0006] A cover plate, wherein pole posts are fitted at both ends of the inner side of the cover plate;

[0007] A plastic material is disposed on the outside of the electrode post, and the lower surface of the plastic material is connected to the cover plate. A limiting ring is provided between the electrode post and the plastic material.

[0008] The limiting ring includes a ring body and a toothed block. The ring body is sleeved on the outside of the pole post, and a second protrusion is formed by a circumferential downward indentation on the lower surface of the ring body. The toothed block is disposed on the inner wall of the ring body to cooperate with the pole post.

[0009] Preferably, the top end of the pole extends outward to form a flange for riveting.

[0010] Preferably, the outer wall of the ring protrudes outward to form a first protrusion that mates with the pole post.

[0011] Preferably, the number of limiting rings is the same as the number of pole posts, and the inner diameter of the limiting rings is equal to the outer diameter of the pole posts.

[0012] Preferably, the lower surface of the cover plate is provided with a conductive connecting piece that is electrically connected to the pole post, and the lower end of the outer surface of the pole post has a sealing ring that seals with the cover plate.

[0013] Preferably, an explosion-proof hole is provided through the center of the inner side of the cover plate, and an explosion-proof valve is provided inside the explosion-proof hole. An explosion-proof patch that cooperates with the explosion-proof hole is provided above the explosion-proof valve.

[0014] Preferably, the limiting ring is made of steel or plastic.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention, by incorporating a ring body, a second protrusion, and toothed blocks, avoids the traditional method of directly connecting and fixing the electrode post to the cover plate via plastic, which can cause relative sliding between the electrode post and the contact surface, resulting in rotation or loosening. This device, with its multiple toothed blocks, effectively restricts the torsion of the electrode post, eliminating the risk of rotation and loosening at the source, thus improving stability. It is particularly suitable for power battery applications in high-vibration, high-current electric vehicles, ensuring stability during use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the limiting ring structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the flange structure after the pole post is riveted according to this utility model.

[0022] Figure 6 This is a schematic diagram of the riveted front pole flange of this utility model.

[0023] In the diagram: 1. Cover plate; 2. Pole post; 201. Flanged edge; 3. Limiting ring; 301. Ring body; 302. First protrusion; 303. Second protrusion; 304. Tooth block; 4. Explosion-proof patch; 5. Plastic; 6. Sealing ring; 7. Explosion-proof valve; 8. Conductive connecting piece. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1-6 This utility model provides a technical solution: a battery top cover structure based on high torque, comprising:

[0026] Cover plate 1, with pole posts 2 assembled at both ends of the inner side of cover plate 1;

[0027] Plastic 5 is disposed on the outside of the pole post 2, and the lower surface of plastic 5 is connected to the cover plate 1. There is a limiting ring 3 between the pole post 2 and plastic 5.

[0028] To limit the torsion of pole post 2;

[0029] The limiting ring 3 includes a ring body 301 and a toothed block 304. The ring body 301 is sleeved on the outside of the pole post 2, and the lower surface of the ring body 301 is recessed downward in the circumferential direction to form a second protrusion 303. The toothed block 304 is disposed on the inner wall of the ring body 301 to cooperate with the pole post 2.

[0030] By having the second protrusion 303 cooperate with the plastic 5 and the toothed block 304 cooperate with the pole post 2, the contact area with the pole post 2 can be increased, thereby making the force distribution more uniform and better restricting the pole post 2 from twisting and loosening.

[0031] By incorporating a ring body 301, a second protrusion 303, and toothed blocks 304, the traditional method of directly connecting and fixing the electrode post 2 to the cover plate 1 via plastic avoids the relative sliding between the electrode post 2 and the contact surface, which could cause rotation or loosening. This device effectively restricts the torsion of the electrode post 2 through multiple toothed blocks 304, eliminating the risk of rotation and loosening of the electrode post 2 at its source, and improving its robustness. It is especially suitable for power battery applications in high-vibration, high-current electric vehicles, ensuring stability during use.

[0032] In this embodiment, preferably, the top end of the pole post 2 extends outward to form a flange 201 for riveting.

[0033] Through the inner toothed structure of the limiting ring 3, a stable anti-rotation can be formed after the pole post 2 is riveted and flanged 201, which in turn links the plastic 5 and locks the top cover plate 1, thus forming a large torque requirement for the pole post 2. At the same time, the pole post 2 of this flanged structure has a large diameter, which can meet the large overcurrent requirement of the battery cell.

[0034] In this embodiment, preferably, the outer wall of the ring body 301 protrudes outward to form a first protrusion 302 that cooperates with the pole post 2.

[0035] This facilitates better transmission of the torsional force from the pole post 2 to the plastic 5 after the ring body 301 is subjected to the torsional force.

[0036] In this embodiment, preferably, the number of limiting rings 3 is the same as the number of pole posts 2, and the inner diameter of the limiting rings 3 is equal to the outer diameter of the pole posts 2;

[0037] This facilitates better contact and engagement between the limiting ring 3 and the pole post 2.

[0038] In this embodiment, preferably, the lower surface of the cover plate 1 is provided with a conductive connecting piece 8 that is electrically connected to the pole post 2, and the lower end of the outer surface of the pole post 2 has a sealing ring 6 that seals with the cover plate 1.

[0039] This facilitates improved sealing around the two pole posts after installation.

[0040] In this embodiment, preferably, an explosion-proof hole is provided through the middle of the inner side of the cover plate 1, and an explosion-proof valve 7 is provided inside the explosion-proof hole. An explosion-proof patch 4 that cooperates with the explosion-proof hole is provided above the explosion-proof valve 7.

[0041] This facilitates pressure relief from the battery casing.

[0042] In this embodiment, preferably, the limiting ring 3 is made of steel or plastic to facilitate better strength or better insulation.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery top cover structure based on high torque, characterized in that, include: Cover plate (1), with pole posts (2) assembled at both ends of the inner side of the cover plate (1); Plastic (5) is disposed on the outside of the pole post (2), and the lower surface of the plastic (5) is connected to the cover plate (1). There is a limiting ring (3) between the pole post (2) and the plastic (5). The limiting ring (3) includes a ring body (301) and a toothed block (304). The ring body (301) is sleeved on the outside of the pole post (2), and the lower surface of the ring body (301) is recessed downward in the circumferential direction to form a second protrusion (303). The toothed block (304) is disposed on the inner wall of the ring body (301) to cooperate with the pole post (2).

2. The battery top cover structure based on high torque according to claim 1, characterized in that: The top of the pole (2) extends outward to form a flange (201) for riveting.

3. The battery top cover structure based on high torque according to claim 1, characterized in that: The outer wall of the ring (301) protrudes outward to form a first protrusion (302) that cooperates with the pole post (2).

4. The battery top cover structure based on high torque according to claim 1, characterized in that: The number of limiting rings (3) is the same as the number of pole posts (2), and the inner diameter of the limiting rings (3) is equal to the outer diameter of the pole posts (2).

5. A battery top cover structure based on high torque according to claim 1, characterized in that: The lower surface of the cover plate (1) is provided with a conductive connecting piece (8) that is electrically connected to the pole post (2), and the lower end of the outer surface of the pole post (2) has a sealing ring (6) that seals with the cover plate (1).

6. The battery top cover structure based on high torque according to claim 1, characterized in that: An explosion-proof hole is provided through the middle of the inner side of the cover plate (1), and an explosion-proof valve (7) is provided inside the explosion-proof hole. An explosion-proof patch (4) that cooperates with the explosion-proof hole is provided above the explosion-proof valve (7).

7. A battery top cover structure based on high torque according to claim 1, characterized in that: The limiting ring (3) is made of steel or plastic.

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