Square battery cover plate plastic part and battery

Abstract

The utility model discloses a square battery cover plate plastic part and a battery. The square battery cover plate plastic part comprises a cover plate, a plastic part main body, a positive pole and a negative pole, the cover plate and the plastic part main body are oppositely arranged, and the plastic part main body is arranged at the lower part of the cover plate; mounting holes are respectively formed in two sides of the cover plate and the plastic part main body; the positive pole column and the negative pole column penetrate through the cover plate and the plastic part main body through the mounting holes in the two sides; plastic part bosses are arranged at the two ends of the plastic part body, the plastic part bosses extend inwards to be provided with boss extending pieces, and the plastic part body, the plastic part bosses and the boss extending pieces are integrally formed through the plastic part. According to the square battery cover plate plastic part designed by the utility model, the plastic extension sheet is additionally arranged at the boss structure, so that the contact area between a battery cell and the cover plate is increased when the battery cell is pushed into a shell in the battery assembly process, the single-point pressure of the battery cell is relieved, and the damage of the battery cell in the battery assembly process can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a square battery cover plastic part and a battery. Background Art

[0002] The battery cover can seal the inside of the battery to ensure the safe use of lithium batteries. In the production process of new energy square batteries, after the bare battery cell is welded to the cover plate, the contact surface between the battery cell and the cover plate is prone to extrusion damage when the core is pushed into the shell for press-fitting. At present, the industry basically increases the matching gap margin between the battery cell and the aluminum shell or pushes the core into the shell in multiple times to reduce the friction force of pushing the core into the shell, but there are problems such as affecting production efficiency, reducing capacity, and making equipment debugging difficult.

[0003] In the prior art, such as patent application number CN202311168726.1 "A lithium battery cover structure with low resistance", a simple lithium battery cover structure is disclosed to solve the existing problems of large volume and high production cost. For another example, patent application number 202321020366.6 "Battery cover assembly and battery" discloses that the battery cover assembly includes: lead-out plates, conductive terminals, and poles, and improves the position of the cover insulating parts and the cover and the lead-out plates, so that deviations are not easy to occur during the installation process. However, in the above-mentioned prior art, when the bare battery cell is pushed into the shell, in order to reduce the resistance to pushing, it is still necessary to increase the gap margin between the battery cell and the aluminum shell or push the core into the shell in multiple times. In the process, it is very easy to cause damage to the battery core, which will inevitably affect the production efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a square battery cover plastic part and a battery. The cover plastic part structure is mainly composed of a rectangular plastic part, and plastic extension sheets are added to the boss structures at both ends, thereby increasing the contact area between the battery cell and the cover when the battery cell is pushed into the shell during battery assembly, reducing the single-point pressure on the battery cell, and effectively improving the battery cell damage during battery assembly.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] On the one hand, the utility model provides a square battery cover plastic part, including: a cover, a plastic part body, a positive electrode column and a negative electrode column;

[0007] The cover plate is arranged opposite to the plastic body, and the plastic body is arranged at the lower part of the cover plate; mounting holes are respectively arranged on both sides of the cover plate and the plastic body, and the positive pole and the negative pole pass through the cover plate and the plastic body through the mounting holes on both sides;

[0008] Plastic bosses are arranged at both ends of the plastic body, and boss extension pieces are arranged inwardly extending from the plastic bosses. The plastic body, the plastic bosses and the boss extension pieces are integrally formed as a plastic body.

[0009] As a further technical solution, it also includes an insulating plate, each of which has a mounting hole in the middle, and two insulating plates are provided, which are respectively fixed on the left and right sides of the cover plate.

[0010] As a further technical solution, an aluminum pressing plate is fixedly mounted on each of the insulating plates, and a mounting hole is provided in the middle of the aluminum pressing plate.

[0011] As a further technical solution, the mounting holes of the aluminum pressing plate, the insulating plate, the cover plate and the plastic component body are all aligned.

[0012] As a further technical solution, the mounting holes are all round holes.

[0013] As a further technical solution, the positive pole and the negative pole pass through the mounting holes of the plastic body and the cover plate, the cover plate mounting hole and the passing parts of the positive pole and the negative pole are respectively provided with sealing rings, and the passing parts are limited by the mounting holes of the insulating plate.

[0014] As a further technical solution, the protruding portion is limited by an insulating plate and then welded to the aluminum pressing plate, which is used for current conduction between the aluminum pressing plate and the negative electrode column and between the aluminum pressing plate and the positive electrode column respectively.

[0015] As a further technical solution, it also includes an explosion-proof valve patch and an explosion-proof valve. The cover plate is provided with an explosion-proof hole at the center, the explosion-proof valve is welded below the explosion-proof hole of the cover plate, and the explosion-proof valve patch is pasted on the outside of the cover plate and at a position corresponding to the explosion-proof valve.

[0016] As a further technical solution, a groove is provided in the middle of the main body of the plastic component, and the groove corresponds to the explosion-proof valve.

[0017] On the other hand, the utility model provides a battery, on which the above-mentioned square battery cover plastic part is installed.

[0018] One or more technical solutions of the utility model have the following beneficial effects:

[0019] The utility model designs a square battery cover plastic part, which adds a plastic extension sheet at the boss structure, thereby increasing the contact area between the battery cell and the cover when the battery cell is pushed into the shell during battery assembly, reducing the single-point pressure on the battery cell, and can effectively improve the battery cell damage during battery assembly, thereby improving battery production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 This is a schematic diagram of the front view of the plastic part of the battery cover of the utility model;

[0022] Figure 2 This is a test schematic diagram of the battery cover plastic part of the utility model;

[0023] Figure 3 It is a bottom view schematic diagram of the battery cover plastic part of the utility model;

[0024] Among them: 1. Aluminum pressing plate; 2. Insulating plate; 3. Cover plate; 4. Plastic body; 5. Negative pole; 6. Explosion-proof valve patch; 7. Explosion-proof valve; 8. Plastic boss; 9. Boss extension piece; 10. Positive pole; 11. Sealing ring. DETAILED DESCRIPTION

[0025] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0026] Embodiment 1

[0027] like Figure 1 As shown, the utility model provides a square battery cover plastic part, including: a cover 3, a plastic part body 4, a positive electrode column 10 and a negative electrode column 5; the cover 3 and the plastic part body 4 are arranged opposite to each other, the plastic part body 4 is arranged at the lower part of the cover 3, the cover 3 and the plastic part body 4 are fitted, a plurality of poles are vertically penetrated on the cover 3 and the plastic part body 4, mounting holes are respectively arranged on both sides of the cover 3 and the plastic part body 4, the positive electrode column 10 and the negative electrode column 5 pass through the cover and the plastic part body through the mounting holes on both sides, and sealing rings 11 are respectively arranged at the mounting holes of the cover 3 and the passing parts of the positive electrode column and the negative electrode column, and the purpose of the sealing ring is to isolate the contact gap between the positive and negative electrode columns and the cover, so as to play a sealing and insulating role;

[0028] The two ends of the plastic body 4 are provided with plastic bosses 8, which realize the supporting function and play a hard limit role when in contact with the battery cell. The plastic boss 8 is provided with a boss extension piece 9 extending inward, which realizes the supporting and buffering functions and plays a flexible limit role when in contact with the battery cell. The boss extension piece can effectively increase the contact area between the cover plate and the battery cell and has a flexible buffering effect. In this embodiment, the plastic body 4, the plastic boss 8 and the boss extension piece 9 are integrally formed as a plastic part.

[0029] In this implementation example, Figure 1 As shown, the square battery cover plastic part also includes an insulating plate 2. The insulating plate 2 is provided with a mounting hole in the middle, and two insulating plates are provided, which are fixed on the left and right sides of the outer side of the cover. An aluminum pressing plate 1 is fixedly installed on each insulating plate 2. The insulating plate 2 separates the aluminum pressing plate 1 and the cover. The aluminum pressing plate 1 is also provided with a mounting hole in the middle. The mounting holes are all circular holes, and the mounting holes of the aluminum pressing plate, insulating plate, cover and plastic body are aligned.

[0030] In this embodiment, the positive electrode column 10 and the negative electrode column 5 are respectively passed through the mounting holes of the plastic body and the cover plate, and the passed parts are limited by the mounting holes of the insulating plate. After the passed parts are limited by the insulating plate, they are welded to the aluminum pressing plate, respectively used for current conduction between the aluminum pressing plate 1 and the negative electrode column 5. 、 The current is conducted between the aluminum pressing plate 1 and the positive electrode column 10 , but the aluminum pressing plate 1 and the negative electrode column 5 and the positive electrode column 10 are not conducted with the cover plate 3 , and the insulating plate 2 , the plastic body 4 and the sealing ring 11 play an insulating role.

[0031] In this embodiment, the square battery cover plastic part also includes an explosion-proof valve patch 6 and an explosion-proof valve 7. An explosion-proof hole is provided at the center of the cover 3. The explosion-proof valve 7 is welded below the explosion-proof hole of the cover 3. The explosion-proof valve patch 6 is pasted on the outside of the cover 3 and at a position corresponding to the explosion-proof valve 7 to play a protective role. A groove is provided in the middle of the plastic body 4, and the groove corresponds to the explosion-proof valve 7.

[0032] Embodiment 2

[0033] The utility model provides a battery, on which a square battery cover plastic part mentioned in the embodiment is installed, which has the same beneficial effects and will not be described in detail herein.

[0034] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A square battery cover plastic part, characterized in that: include: Cover plate, plastic body, positive pole and negative pole; The cover plate is arranged opposite to the plastic body, and the plastic body is arranged at the lower part of the cover plate; mounting holes are respectively arranged on both sides of the cover plate and the plastic body, and the positive pole and the negative pole pass through the cover plate and the plastic body through the mounting holes on both sides; Plastic bosses are arranged at both ends of the plastic body, and boss extension pieces are arranged inwardly extending from the plastic bosses. The plastic body, the plastic bosses and the boss extension pieces are integrally formed as a plastic body.

2. A square battery cover plastic part as claimed in claim 1, characterized in that: It also includes an insulating plate, each of which has a mounting hole in the middle, and two insulating plates are provided, which are respectively fixed on the left and right sides of the cover plate.

3. A square battery cover plastic part as claimed in claim 2, characterized in that: An aluminum pressing plate is fixedly mounted on each of the insulating plates, and a mounting hole is arranged in the middle of the aluminum pressing plate.

4. A square battery cover plastic part as claimed in claim 3, characterized in that: The mounting holes of the aluminum pressing plate, the insulating plate, the cover plate and the plastic body are all aligned.

5. A square battery cover plastic part as claimed in claim 1, characterized in that: The mounting holes are all round holes.

6. A square battery cover plastic part as claimed in claim 1, characterized in that: The positive pole and the negative pole pass through the mounting holes of the plastic body and the cover plate, the cover plate mounting hole and the passing parts of the positive pole and the negative pole are respectively provided with sealing rings, and the passing parts are limited by the mounting holes of the insulating plate.

7. A square battery cover plastic part as claimed in claim 6, characterized in that: The protruding portion is limited by the insulating plate and then welded to the aluminum pressing plate, and is used for current conduction between the aluminum pressing plate and the negative electrode column, and between the aluminum pressing plate and the positive electrode column.

8. A square battery cover plastic part as claimed in claim 1, characterized in that: It also includes an explosion-proof valve patch and an explosion-proof valve. The center of the cover plate is provided with an explosion-proof hole. The explosion-proof valve is welded below the explosion-proof hole of the cover plate. The explosion-proof valve patch is pasted on the outer side of the cover plate and at a position corresponding to the explosion-proof valve.

9. A square battery cover plastic part as claimed in claim 1, characterized in that: A groove is provided in the middle of the main body of the plastic part, and the groove corresponds to the explosion-proof valve.

10. A battery, characterized in that: It comprises a square battery cover plastic part as described in any one of claims 1 to 9.

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