A new structure of welding battery top cover

Abstract

The utility model discloses a new structure welding battery top cover, include: top cover, the inside of top cover is provided with the electrode post of electricity connection, plastic is set up in the electrode post of electricity connection outside surface, ring, set up in the inside of plastic, just ring and electrode post of electricity connection are fixed through welding, sealing ring, set up in the upper surface of electrode post of electricity connection edge to seal with top cover contact, the utility model discloses can be very good through welding to make electrode post of electricity connection and ring cooperation constitute whole, compared with physical riveting pressure has better firmness, and ring and electrode post of electricity connection contact compactness is good, guaranteeing the good sealing property of pole periphery, the connecting piece in this application is through the convex slot and is matched with electrode post of electricity connection, and it is favorable to improve the contact area, and guarantee the good conductive effect of device.

Description

Technical Field

[0001] The utility model specifically relates to a new structure welded battery top cover. Background Technique

[0002] In the structure of a battery, especially in a sealed secondary battery such as a lithium-ion battery or a nickel-metal hydride battery, the battery top cover is a core component located at the top of the battery housing and performing multiple key functions. The pole post passes through the top cover hole and is fixed to the top cover by riveting or injection molding.

[0003] In the existing technology, fixing the pole post and the top cover by injection molding has poor firmness, and the plastic is prone to deformation, resulting in the displacement of the pole post position. Some are fixed by riveting, but there is stress relaxation during riveting in a high-vibration environment, and connection loosening is likely to occur, affecting the sealing effect of the sealing ring around the pole post. Therefore, we propose a new structure welded battery top cover. Content of the Utility Model

[0004] The purpose of the utility model is to provide a new structure welded battery top cover to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A new structure welded battery top cover, including:

[0006] A top cover, with a connecting pole post arranged inside the top cover;

[0007] Plastic, arranged on the outer surface of the connecting pole post;

[0008] A ring, arranged inside the plastic, and the ring is fixed to the connecting pole post by welding;

[0009] A sealing ring, arranged on the upper surface of the edge of the connecting pole post to contact the top cover for sealing.

[0010] Preferably, the cross-section of the connecting pole post is "L" shaped, and a connecting piece is connected to the lower end of the connecting pole post.

[0011] Preferably, one end of the upper surface of the connecting piece protrudes upward to form a convex groove extending into the inside of the connecting pole post.

[0012] Preferably, the cross-section of the ring is rectangular.

[0013] Preferably, a pressure relief hole is penetrated and opened inside the top cover, an explosion-proof valve piece is arranged inside the pressure relief hole, and a sealing patch cooperating with the pressure relief hole is arranged above the explosion-proof valve piece.

[0014] Preferably, a scoring line for forming a rupture path during pressure relief is arranged on the upper surface of the explosion-proof valve piece.

[0015] Preferably, the material of the ring is steel.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention facilitates the welding of a ring to the electrode post to form a fixed battery top cover assembly, avoiding the traditional method of directly fixing the electrode post to the top cover through injection molding, which results in poor connection strength. This device can effectively weld the electrode post and the ring to form a whole, providing better stability compared to physical riveting. The ring and the electrode post have a tight contact, ensuring good sealing around the electrode post. In addition, the ring is easy to replace if the welding is damaged. In this application, the connecting piece engages with the electrode post through a groove, which helps to increase the contact area and ensure good conductivity of the device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the exploded structure of this utility model.

[0021] In the diagram: 1. Top cover; 2. Electrode post; 3. Ring; 4. Plastic; 5. Connecting piece; 6. Sealing ring; 7. Explosion-proof valve plate; 8. Sealing patch; 9. Pressure relief hole. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-3 This utility model provides a technical solution: a novel welded battery top cover, comprising:

[0024] Top cover 1, with electrode post 2 provided on the inner side of top cover 1;

[0025] Plastic 4 is disposed on the outer surface of the electrode post 2;

[0026] Ring 3 is located inside plastic 4, and ring 3 is fixed to electrode post 2 by welding;

[0027] It is convenient for the top end of the connecting electrode column 2 to be fixed, so that the upper end of the connecting electrode column 2 protrudes steadily above the top cover 1. During welding, laser welding can be carried out, so that the ring 3 and the connecting electrode column 2 are connected to form a whole;

[0028] The sealing ring 6 is arranged on the upper surface of the edge of the connecting electrode column 2 to contact with the top cover 1 for sealing.

[0029] In this embodiment, preferably, the cross-section of the connecting electrode column 2 is "U" shaped, and a connecting piece 5 is connected to the lower end of the connecting electrode column 2.

[0030] In this embodiment, preferably, one end of the upper surface of the connecting piece 5 protrudes upward to form a convex groove extending into the inner side of the connecting electrode column 2;

[0031] It is convenient to electrically connect the connecting electrode column 2 with the battery cell through the connecting piece 5. The cooperation between the convex groove and the connecting electrode column 2 is beneficial to increase the contact conductive area and improve the conductivity.

[0032] In this embodiment, preferably, the cross-section of the ring 3 is rectangular, which is convenient for a better conductive area, and during welding, the connecting electrode column 2 and the ring 3 have a better contact welding surface area.

[0033] In this embodiment, preferably, a pressure relief hole 9 is penetrated through the inner side of the top cover 1, an explosion-proof valve piece 7 is arranged inside the pressure relief hole 9, and a sealing patch 8 cooperating with the pressure relief hole 9 is arranged above the explosion-proof valve piece 7.

[0034] In this embodiment, preferably, the upper surface of the explosion-proof valve piece 7 is provided with scoring lines for forming a rupture path during pressure relief, which is convenient for releasing the relatively high gas pressure in the battery case.

[0035] In this embodiment, preferably, the material of the ring 3 is steel, which is convenient for better strength.

[0036] In this utility model, through the welding cooperation between the ring 3 and the connecting electrode column 4, a fixed battery top cover assembly is formed, avoiding the traditional method of directly fixing the pole column to the top cover 1 by injection molding, with poor connection firmness. This device can well make the connecting electrode column 4 and the ring 3 cooperate to form a whole through welding, which has better firmness compared with physical riveting, and the contact tightness between the ring 3 and the connecting electrode column 4 is good, ensuring good sealing around the pole column. In addition, after the ring 3 is damaged by welding, it is also easy to replace the ring 3. In this application, the connecting piece 5 cooperates with the connecting electrode column 4 through the convex groove, which is beneficial to increase the contact area and ensure good conductive effect of the device.

[0037] 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 novel welded battery top cover, characterized in that, Comprising: A top cover (1), with an electrode connecting post (2) provided inside the top cover (1); Plastic (4), provided on the outer surface of the electrode connecting post (2); A ring (3), provided inside the plastic (4), and the ring (3) is fixed to the electrode connecting post (2) by welding; A sealing ring (6), provided on the upper surface of the edge of the electrode connecting post (2) to contact the top cover (1) for sealing.

2. The novel welded battery top cover according to claim 1, characterized in that: The cross-section of the electrode connecting post (2) is "J"-shaped, and a connecting piece (5) is connected to the lower end of the electrode connecting post (2).

3. The novel welded battery top cover according to claim 2, characterized in that: One end of the upper surface of the connecting piece (5) protrudes upward to form a convex groove extending into the inside of the electrode connecting post (2).

4. The novel welded battery top cover according to claim 1, characterized in that: The cross-section of the ring (3) is rectangular.

5. The novel welded battery top cover according to claim 1, characterized in that: A pressure relief hole (9) is penetrated and opened inside the top cover (1), an explosion-proof valve piece (7) is provided inside the pressure relief hole (9), and a sealing patch (8) cooperating with the pressure relief hole (9) is provided above the explosion-proof valve piece (7).

6. The novel welded battery top cover according to claim 5, characterized in that: The upper surface of the explosion-proof valve piece (7) is provided with scoring lines for forming a rupture path during pressure relief.

7. A novel welded battery top cover according to claim 6, characterized in that: The material of the ring (3) is steel.

Images