CN-120453594-B - Battery cover plate assembly, battery pack and electric equipment

Abstract

The utility model relates to a battery apron subassembly, battery package and consumer, battery apron subassembly include apron main part, first drawing forth piece, second drawing forth piece and a plurality of utmost point post, first drawing forth piece is used for drawing forth the anodal or the negative pole of battery, the second drawing forth piece is used for being connected with the electric core of battery, first drawing forth piece with the second drawing forth piece is located respectively the opposite both sides of apron main part, the utmost point post wears to locate the apron main part, a plurality of utmost point posts connect in parallel first drawing forth piece with between the second drawing forth piece, wherein, a plurality of utmost point posts include first utmost point post and second utmost point post, the impedance of second utmost point post is less than the impedance of first utmost point post. The battery cover plate assembly provided by the disclosure can reduce the temperature rise of the pole, avoid the overhigh temperature of the pole, and is favorable for keeping the battery with good performance.

Inventors

• DUAN PINGAN
• YUAN WANSONG
• WANG XINYUE

Assignees

• 比亚迪股份有限公司

Dates

Publication Date

20260505

Application Date

20241121

Claims (14)

1. 1. The battery cover plate assembly is characterized by comprising a cover plate main body, a first lead-out piece, a second lead-out piece and a plurality of polar posts, wherein the first lead-out piece is used for leading out a positive electrode or a negative electrode of a battery, the second lead-out piece is used for being connected with a battery core of the battery, the first lead-out piece and the second lead-out piece are respectively positioned on two opposite sides of the cover plate main body, the polar posts penetrate through the cover plate main body, the polar posts are connected between the first lead-out piece and the second lead-out piece in parallel, the polar posts comprise a first polar post and a second polar post, the impedance of the second polar post is smaller than that of the first polar post, and the cross section area of the second polar post is smaller than that of the first polar post.
2. 2. The battery cover assembly of claim 1, wherein the first post is made of a first predetermined material and the second post is made of a second predetermined material having an impedance less than an impedance of the first predetermined material such that the impedance of the second post is less than the impedance of the first post.
3. 3. The battery cover plate assembly of claim 2, wherein the second predetermined material comprises at least one of gold, copper, silver.
4. 4. The battery cover assembly of claim 3, wherein the first predetermined material comprises a copper aluminum composite.
5. 5. The battery cover assembly of claim 1, wherein the ratio of the cross-sectional area of the second post to the cross-sectional area of the first post is 0.4-0.6.
6. 6. The battery cover assembly of claim 5, wherein the ratio of the cross-sectional area of the second post to the cross-sectional area of the first post is 0.5.
7. 7. The battery cover assembly of claim 1, wherein a plurality of the posts comprises at least two first posts and at least one second post, the second post being disposed between adjacent two of the first posts.
8. 8. The battery cover assembly of claim 1, wherein the posts have axially opposed first and second ends, the first end being connected to the first lead-out member and the second end being connected to the second lead-out member, adjacent two of the posts being spaced apart.
9. 9. The battery cover assembly of claim 1, further comprising a first insulator seat disposed between the cover body and the first lead-out for providing insulation between the cover body and the first lead-out, the first insulator seat having a first via hole therein, the post being disposed through the first via hole.
10. 10. The battery cover assembly of claim 1, further comprising a second insulating mount between the cover body and the first lead-out for providing insulation between the cover body and the first lead-out, the second insulating mount having a second via through which the post is disposed.
11. 11. The battery cover plate assembly of claim 1, further comprising an insulating sleeve, wherein a third via is formed in the cover plate body, the post is disposed through the third via, and the insulating sleeve is disposed in the third via and is used to provide insulation between the cover plate body and the post.
12. 12. A battery comprising a battery cover assembly according to any one of claims 1-11.
13. 13. A battery pack comprising the battery of claim 12.
14. 14. A powered device comprising the battery pack of claim 13.

Description

Battery cover plate assembly, battery pack and electric equipment Technical Field The disclosure relates to the technical field of batteries, in particular to a battery cover plate assembly, a battery pack and electric equipment. Background At present, a lead-out piece is generally arranged on a cover plate of a battery cover plate assembly, and the lead-out piece is generally electrically connected with the lead-out piece on the battery core through a pole, so that electric energy in the battery core is output to the outside. Disclosure of Invention The purpose of this disclosure is to provide a battery cover plate subassembly, and this battery cover plate subassembly can reduce the temperature rise of utmost point post, avoids utmost point post temperature too high, is favorable to making the battery keep good performance. In order to achieve the above object, according to a first aspect of the present disclosure, there is provided a battery cover assembly including a cover main body, a first lead-out member for leading out a positive electrode or a negative electrode of a battery, a second lead-out member for being connected with a core of the battery, the first lead-out member and the second lead-out member being located at opposite sides of the cover main body, respectively, and a plurality of posts penetrating the cover main body, the posts being connected in parallel between the first lead-out member and the second lead-out member, wherein the posts include a first post and a second post, and an impedance of the second post is smaller than an impedance of the first post. Optionally, the first pole is made of a first preset material, and the second pole is made of a second preset material, and the impedance of the second preset material is smaller than that of the first preset material, so that the impedance of the second pole is smaller than that of the first pole. Optionally, the second preset material comprises at least one of gold, copper, silver. Optionally, the first preset material comprises a copper-aluminum composite material. Optionally, the cross-sectional area of the second pole is smaller than the cross-sectional area of the first pole. Optionally, the ratio of the cross-sectional area of the second pole to the cross-sectional area of the first pole is 0.4-0.6. Optionally, the ratio of the cross-sectional area of the second pole to the cross-sectional area of the first pole is 0.5. Optionally, the plurality of the poles includes at least two first poles and at least one second pole, and the second pole is disposed between two adjacent first poles. Optionally, the pole has a first end and a second end which are oppositely arranged in the axial direction, the first end is connected with the first lead-out piece, the second end is connected with the second lead-out piece, and two adjacent poles are arranged at intervals. Optionally, the battery cover plate assembly further includes a first insulating seat, the first insulating seat is disposed between the cover plate main body and the first lead-out member, so as to provide insulation between the cover plate main body and the first lead-out member, a first via hole is disposed on the first insulating seat, and the pole is disposed through the first via hole. Optionally, the battery cover plate assembly further includes a second insulating seat, the second insulating seat is located between the cover plate main body and the first lead-out member, so as to provide insulation between the cover plate main body and the first lead-out member, a second via hole is formed in the second insulating seat, and the pole is arranged through the second via hole. Optionally, the battery cover plate assembly further includes an insulating sleeve, a third via hole is formed in the cover plate main body, the pole is arranged in the third via hole in a penetrating manner, and the insulating sleeve is arranged in the third via hole and is used for providing insulation between the cover plate main body and the pole. According to a second aspect of the present disclosure, there is provided a battery comprising a battery cover assembly as described above. According to a third aspect of the present disclosure, there is provided a battery pack including the battery as described above. According to a fourth aspect of the present disclosure, there is provided a powered device comprising a battery pack as described above. The technical scheme provided by the embodiment of the disclosure can include the following beneficial effects that the battery cover plate assembly provided by the disclosure is provided with the plurality of poles, the plurality of poles are connected between the first leading-out piece and the second leading-out piece in parallel, and based on the fact that the total resistance of the plurality of poles is smaller than any partial resistance in a circuit, compared with the embodiment that only the first pole is arranged between the first leading-out