CN218070004U

CN218070004U - Novel battery cover plate and battery

Info

Publication number: CN218070004U
Application number: CN202221496083.4U
Authority: CN
Inventors: 李孝
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2022-12-16
Anticipated expiration: 2032-06-14

Abstract

The utility model discloses a novel battery apron and battery, include: the cover plate comprises a cover plate body, wherein a through hole is formed in the cover plate body, a convex ring is arranged on the upper edge of the through hole in a surrounding mode, and the convex ring and the cover plate body are integrally formed in a stamping mode; the pole post assembly comprises a sealing ring and a pole post, the sealing ring is sleeved on the periphery of the pole post, the pole post penetrates through the through hole and is installed in the convex ring, and the pole post comprises a positive pole post and a negative pole post; the upper plastic is injected on the surfaces of the pole and the convex ring; and the bottom ring is welded at the bottom of the pole. The utility model integrally punches the convex ring on the battery cover plate and welds the bottom ring at the bottom after the installation of the pole component is completed, thereby improving the stress of the pole, further improving the stability of the structure and improving the sealing performance of the positive pole and the negative pole, so that the sealing performance of the pole can still be ensured even under the high temperature condition of the cover plate; and the structural design can reduce the process difficulty, improve the production efficiency, improve the yield and reduce the cost.

Description

Novel battery cover plate and battery

Technical Field

The utility model belongs to the technical field of the battery, concretely relates to novel battery apron and battery.

Background

With the increasing shortage of resources, the electric power is used as clean energy, and the application range is increasingly wide. Batteries are a device that can store electricity, and the safety of batteries is also important. The battery cover plate is used as an important component of the power battery and determines the sealing performance and the insulating performance of the power battery.

The battery cover plate generally includes a positive post, a negative post, a top cover plate, a fixing ring, a plastic member, a sealing ring, and the like. A current battery apron is through moulding plastics the anodal post with solid fixed ring and combine together through the plastic, makes anodal subassembly, and it combines together to mould plastics through the plastic through negative pole post and solid fixed ring, makes the negative pole subassembly, then anodal subassembly and negative pole subassembly respectively and the top cap between the sealing washer of impressing, through laser welding's mode, weld on the top cap piece. However, the fixing ring of the battery cover plate has high cost, when the positive electrode assembly and the negative electrode assembly are welded, the positive electrode assembly and the negative electrode assembly need to be pressurized at a certain pressure so as to achieve the purpose of compressing the sealing ring, the welding process is complex, and the welding reject ratio is high. The current another kind of battery cover plate is through putting into solid fixed ring with anodal post and sealing washer, utilizes the plastic to mould plastics and combines together, makes anodal subassembly, puts into solid fixed ring through negative pole post and sealing washer, and it combines together to mould plastics through the plastic, makes the negative pole subassembly, then anodal subassembly and negative pole subassembly pass through laser welding's mode, weld to the top cap piece on. The cover plate fixing ring is high in cost, the fixing ring and the plastic are not well stressed, and the plastic is melted or even falls off when the pole is heated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel battery apron and battery for solve at least one technical problem who exists among the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an aspect of the utility model is to provide a novel battery cover plate, include:

the cover plate comprises a cover plate body, wherein a through hole is formed in the cover plate body, a convex ring is arranged on the upper edge of the through hole in a surrounding mode, and the convex ring and the cover plate body are integrally formed in a punching mode;

the pole post assembly comprises a sealing ring and a pole post, the sealing ring is sleeved on the periphery of the pole post, the pole post penetrates through the through hole and is installed in the convex ring, and the pole post comprises a positive pole post and a negative pole post;

the upper plastic is injected on the surfaces of the pole and the convex ring;

the bottom ring is welded at the bottom of the cover plate body corresponding to the convex ring.

In a possible design, the plastic cover further comprises a lower plastic, wherein a clamping piece is arranged on one side, facing the cover plate body, of the lower plastic, and the clamping piece is clamped on the bottom ring.

In one possible design, the bottom ring is made of aluminum.

In one possible design, an explosion-proof valve is further installed on the cover plate body, and a protective film is arranged on the explosion-proof valve.

Another aspect of the present invention is to provide a battery including a novel battery cover plate as in any one of the possible designs of the first aspect.

In one possible design, the battery further comprises a battery shell, and the material of the battery shell is aluminum.

The utility model discloses compare in prior art's beneficial effect do:

the utility model cancels the traditional design of the fixed ring, integrally punching and forming the convex ring on the battery cover plate, and welding the bottom ring at the bottom after the installation of the pole component is completed, thereby improving the stress of the pole, further improving the stability of the structure, and simultaneously improving the sealing performance of the positive pole column and the negative pole column, so that the pole of the cover plate can still ensure the sealing performance even under the high temperature condition; and the structural design can reduce the process difficulty, improve the production efficiency, improve the yield and reduce the cost.

Drawings

Fig. 1 is a perspective view of a novel battery cover plate in the present embodiment;

fig. 2 is an exploded view of the novel battery cover plate in this embodiment;

FIG. 3 isbase:Sub>A sectional view of the battery cover plate A-A in the present embodiment;

fig. 4 is a partially enlarged view of the present embodiment at B.

Wherein, 1-cover plate body; 2-a through hole; 21-a first via; 22-a second via; 3-a convex ring; 31-a first convex ring; 32-a second convex ring; 5-sealing ring; 51-a first seal ring; 52-a second sealing ring; 6-pole column; 61-positive pole; 62-negative pole post; 7-coating plastic; 71-first upper plastic; 72-second upper plastic; 8-bottom ring; 81-a first bottom ring; 82-a second bottom ring; 9-discharging plastic; 10-a fastener; 11-an explosion-proof valve; 12-protective film.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments in the present specification without any creative effort belong to the protection scope of the present invention.

In order to solve the technical problems that the cost of a fixing ring of a battery cover plate in the prior art is high, when a positive electrode assembly and a negative electrode assembly are welded, a certain pressure is needed to pressurize the positive electrode assembly and the negative electrode assembly so as to achieve the purpose of compressing a sealing ring, the welding process is complex, the welding reject ratio is high and the like, the utility model provides a novel battery cover plate which cancels the traditional fixing ring design, integrally punches a convex ring on the battery cover plate, and welds a bottom ring at the bottom after the installation of the pole assembly is completed, so that the pole stress can be improved, the structural stability is further improved, the sealing performance of a positive pole column and a negative pole column is improved, and the sealing performance of the cover plate can still be ensured even if the pole column is in a high-temperature condition; and the structural design can reduce the process difficulty, improve the production efficiency, improve the yield and reduce the cost. The battery cover plate will be described in detail below with reference to specific examples.

Examples

As shown in fig. 1 to fig. 4, in one aspect, the present embodiment provides a novel battery cover plate, preferably a lithium battery cover plate, including: the cover plate comprises a cover plate body 1, wherein a through hole 2 is formed in the cover plate body 1, a convex ring 3 is arranged on the upper edge of the through hole 2 in a surrounding mode, and the convex ring 3 and the cover plate body 1 are integrally formed in a punching mode; the pole assembly comprises a sealing ring 5 and a pole 6, the sealing ring 5 is sleeved on the periphery of the pole 6, the pole 6 penetrates through the through hole 2 and is installed in the convex ring 3, and the pole 6 comprises a positive pole 61 and a negative pole 62; the upper plastic 7 is injected on the surfaces of the pole 6 and the convex ring 3; and the bottom ring 8 is welded at the bottom of the cover plate body 1 corresponding to the convex ring 3.

It should be noted that, in the present embodiment, the shapes of the pole 6, the convex ring 3, the sealing ring 5 and the bottom ring 8 are preferably circular, but it is understood that the shape of the above-mentioned components may be other shapes such as square, and may be specifically adjusted according to actual requirements, and the present invention is not limited thereto.

Specifically, at least a first through hole 21 and a second through hole 22 are formed in the cover plate body 1, a first convex ring 31 is arranged around the upper edge of the first through hole 21, a second convex ring 32 is arranged around the upper edge of the second through hole 22, and the first convex ring 31 and the second convex ring 32 are integrally formed by stamping; the pole assembly comprises a positive pole assembly and a negative pole assembly, the positive pole assembly comprises a positive pole 61 and a first sealing ring 51, the first sealing ring 51 is sleeved on the periphery of the positive pole 61, and the positive pole 61 penetrates through the first through hole 21 and is installed in the first convex ring 31; the negative pole assembly comprises a negative pole 62 and a second sealing ring 52, the second sealing ring 52 is sleeved on the periphery of the negative pole 62, and the negative pole 62 passes through the second through hole 22 and is installed in the second convex ring 32; the upper plastic 7 comprises a first upper plastic 71 and a second upper plastic 72, the first upper plastic 71 is injection-molded on the surfaces of the positive post 61 and the first convex ring 31, and the second upper plastic 72 is injection-molded on the surfaces of the negative post 62 and the second convex ring 32; the bottom ring 8 comprises a first bottom ring 81 and a second bottom ring 82, the first bottom ring 81 is welded at the bottom of the positive pole 61, and the second bottom ring 82 is welded at the bottom of the negative pole 62.

It should be noted that, the installation principle of the battery cover plate in this embodiment is specifically as follows:

firstly, sleeving a first sealing ring 51 on the peripheral side of a positive post 61, and installing the first sealing ring 51 and the positive post 61 in a first convex ring 31 after penetrating through a first through hole 21; similarly, the second sealing ring 52 is sleeved on the periphery of the negative pole 62, and the second sealing ring 52 and the negative pole 62 are installed in the second convex ring 32 after passing through the second through hole 22; wherein, the first convex ring 31 and the second convex ring 32 have been previously formed by integrally stamping with the battery cover plate. Then, the first bottom ring 81 is welded to the bottom of the positive post 61, and the second bottom ring 82 is welded to the bottom of the negative post 62. Finally, the surface of the positive electrode post 61 and the surface of the negative electrode post 62 are respectively injected by using the upper plastic 7 to ensure the sealing property and the insulating property.

In a specific embodiment, the cover plate further comprises a lower plastic 9, wherein a fastening piece 10 is arranged on one side of the lower plastic 9 facing the cover plate body 1, and the fastening piece 10 is fastened on the bottom ring 8; specifically, the lower plastic 9 is a rubber plate adapted to the bottom of the cover plate, two fastening pieces 10 are arranged on one side of the rubber plate facing the bottom of the cover plate body 1, the fastening pieces 10 are preferably fastening rings adapted to the inner ring of the bottom ring 8, and the fastening rings are fastened to the inner ring of the bottom ring 8 to fix the lower plastic 9.

In a specific embodiment, the bottom ring 8 is made of an aluminum material, which has the advantages of low density, light weight, strong corrosion resistance, low cost and the like, so that the cover plate structure is lighter; of course, it should be understood that the bottom ring 8 in the present embodiment is not limited to be made of aluminum, but may be made of other metal materials, such as copper, etc., and it should be noted that the material of the bottom ring is preferably the same as the material of the cover plate body 1.

In a specific embodiment, the cover plate body is further provided with an explosion-proof valve 11, the explosion-proof valve is provided with a protective film 12, the explosion-proof valve 11 and the protective film 12 can adopt the existing structure, and the description is omitted here.

Practical verification shows that the battery cover plate in the embodiment can reduce the production process, improve the welding efficiency by 20%, improve the yield to 99.5% and reduce the comprehensive cost by 10% in practical production based on the content disclosed above, and has a good application prospect.

Based on the above disclosure, the present embodiment cancels the conventional fixing ring design, and the protruding ring 3 is integrally formed on the battery cover plate by punching, and the bottom ring 8 is welded at the bottom after the terminal assembly is mounted, so as to improve the stress of the terminal 6, further improve the structural stability, and simultaneously improve the sealing performance of the positive terminal 61 and the negative terminal 62, so that the sealing performance of the terminal 6 can be ensured even at high temperature by the cover plate; and the structural design can reduce the process difficulty, improve the production efficiency, improve the yield and reduce the cost.

In another aspect, this embodiment provides a battery, preferably a lithium battery, comprising the novel battery cover plate as described in any one of the possible designs of the first aspect; preferably, the battery further comprises a battery shell, and the battery shell is made of aluminum. It is understood that any battery using the battery cover plate of the first aspect of the present embodiment is included in the scope of the present invention.

Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel battery cover plate is characterized by comprising:

the cover plate comprises a cover plate body (1), wherein a through hole (2) is formed in the cover plate body (1), a convex ring (3) is arranged on the upper edge of the through hole (2) in a surrounding mode, and the convex ring (3) and the cover plate body (1) are integrally formed in a stamping mode;

the post assembly comprises a sealing ring (5) and a post (6), the sealing ring (5) is sleeved on the periphery of the post (6), the post (6) penetrates through the through hole (2) and is installed in the convex ring (3), and the post (6) comprises a positive post (61) and a negative post (62);

the upper plastic (7) is injected on the surfaces of the pole (6) and the convex ring (3);

the bottom ring (8), the bottom ring (8) is welded at the bottom of the cover plate body (1) corresponding to the convex ring (3).

2. The novel battery cover plate according to claim 1, further comprising a lower plastic (9), wherein a fastening member (10) is disposed on one side of the lower plastic (9) facing the cover plate body (1), and the fastening member (10) is fastened to the bottom ring (8).

3. The novel battery cover plate according to claim 1, characterized in that the bottom ring (8) is made of aluminum.

4. The novel battery cover plate according to claim 1, wherein an explosion-proof valve (11) is further mounted on the cover plate body (1), and a protective film (12) is arranged on the explosion-proof valve.

5. A battery comprising the novel battery cover plate of any one of claims 1-4.

6. The battery of claim 5, further comprising a battery case, wherein the battery case is made of aluminum.