CN-224204191-U - Battery cover plate assembly, battery assembly and electric equipment

Abstract

The utility model relates to a battery cover plate assembly, which comprises an electrode terminal, a cover plate body, a first insulating piece and a second insulating piece. The cover plate body is provided with a mounting hole, and the electrode terminal penetrates through the mounting hole. The electrode terminal comprises the first connecting part and the second connecting part, wherein the first connecting part is used for being electrically connected with the busbar, and the second connecting part is used for being connected with the electrode core.

Inventors

• MENG XIANGYUE
• WEI JIANFENG
• YAN YONG
• WANG GUANGFEI
• WANG XUSHENG

Assignees

• 比亚迪股份有限公司

Dates

Publication Date

20260505

Application Date

20250115

Claims (18)

1. 1. A battery cover assembly, wherein the battery cover assembly comprises an electrode terminal and a cover body; the cover plate body is provided with a mounting hole, and the mounting hole penetrates through the cover plate body; And the electrode terminal penetrates through the mounting hole and comprises a first connecting part and a second connecting part, the first connecting part is used for being electrically connected with the busbar, and the second connecting part is used for being connected with the pole core.
2. 2. The battery cover assembly of claim 1, wherein the area of the first connection portion of the electrode terminal is S and the area of the cover body is S1, satisfying the relationship 0.18≤S/S1≤0.7.
3. 3. The battery cover assembly of claim 2, wherein the first connection portion of the electrode terminal has a length L and the cover body has a length L1, satisfying the relationship 0.2≤L/L1≤0.93.
4. 4. The battery cover assembly of claim 2, wherein the width of the first connection portion of the electrode terminal is W and the width of the cover body is W1, satisfying the relationship 0.44≤W/W1≤0.85.
5. 5. The battery cover assembly of claim 1, further comprising a first insulator, the first insulator having a first through hole, the electrode terminal passing through the first through hole for connection with the electrode core, the first insulator being located between the electrode terminal and the cover body for electrically isolating the electrode terminal from the cover body.
6. 6. The battery cover assembly according to claim 5, wherein edges of the first connection portions of the electrode terminals are provided with sub-connection portions for connection with the first insulating member.
7. 7. The battery cover assembly of claim 5, further comprising a second insulator on a side of the cover body facing the pole piece for electrically isolating the cover body from the pole piece, the second insulator having a second through hole through which the electrode terminal passes.
8. 8. The battery cover assembly of claim 7, wherein the cover body is provided with a recess around the mounting hole for at least partially receiving the first insulator and/or the second insulator.
9. 9. The battery cover assembly of claim 8, wherein the second insulating member is provided with a fixing portion by which the second insulating member is fixedly connected with the recess portion of the cover body.
10. 10. The battery cover assembly of claim 9, wherein the fixing portion is a buckle, the buckle has a body portion and a flange portion, the body portion and the flange portion enclose a mating space, and a height of the mating space in a direction of the second insulating member toward the cover body is greater than or equal to a thickness of the recess portion.
11. 11. The battery cover assembly of claim 10, wherein the first connection portion of the electrode terminal is provided with a relief groove extending horizontally through to an edge of the first connection portion.
12. 12. The battery cover assembly of claim 11, wherein the relief groove has a width W2 satisfying the relationship 1/5< W2/W <4/5.
13. 13. The battery cover assembly of claim 11, wherein a distance between two adjacent relief grooves is L2, satisfying the relationship (1/4) L1< L2< (3/4) L1.
14. 14. The battery cover assembly of claim 11, wherein the relief groove has a depth D and the sub-connection has a thickness D1, satisfying the relationship (1/3) D1 +.d +.4/5) D1.
15. 15. The battery cover assembly of any one of claims 1-14, wherein the second connection is configured to connect to the pole piece, including the second connection being directly connected to the pole piece or the second connection being indirectly connected to the pole piece.
16. 16. A battery, comprising: A housing forming a receiving cavity having an opening; the pole core is arranged in the accommodating cavity and provided with a pole lug; A cap plate assembly, which is a battery cap plate assembly according to any one of claims 1 to 14, provided at the opening to close the case, the electrode terminal of the cap plate assembly being connected with the electrode core.
17. 17. A battery assembly comprising the battery of claim 15.
18. 18. A powered device comprising a battery or battery assembly as claimed in claim 15 or 16.

Description

Battery cover plate assembly, battery assembly and electric equipment Technical Field The utility model relates to the technical field of batteries, in particular to a battery cover plate assembly, a battery assembly and electric equipment. Background As lithium ion battery technology matures and is widely used in the fields of electric automobiles and energy storage, the requirements on the service performance of the lithium ion battery are continuously improved. In the design scheme of the existing battery, the current carrying capacity of the battery is low, and the increasing battery requirements cannot be met. Disclosure of utility model It is a primary object of the present utility model to overcome at least one of the above-mentioned drawbacks of the prior art and to provide a battery cover assembly with high current carrying capacity. The second object of the present utility model is to provide a battery cell, which can effectively simplify the assembly process of the battery case and improve the charge and discharge efficiency by providing a battery cover plate assembly. The third object of the present utility model is to provide an electric device, which can effectively simplify the assembly process of the battery case and improve the charge and discharge efficiency through the battery cover plate assembly. The battery cover plate assembly provided by the utility model comprises: An electrode terminal, and a cap plate body. The electrode terminal is arranged in the mounting hole and comprises a first connecting part and a second connecting part, the first connecting part is used for being electrically connected with the busbar, and the second connecting part is used for being connected with the pole core. According to the battery cover plate assembly provided by the utility model, the cover plate body is provided with the mounting hole penetrating through the cover plate body, the electrode terminal comprises the first connecting part and the second connecting part, and the electrode terminal is penetrated through the mounting hole, so that the first connecting part of the electrode terminal is used for being electrically connected with the busbar, and the second connecting part is used for being connected with the pole core, thereby simplifying the electric lead-out path of the battery unit. And the first connecting part and the second connecting part of the electrode terminal are respectively connected with the busbar and the pole core, so that the shortening of an electric extraction path is realized, the battery cover plate is beneficial to saving the space occupied by the battery in the height direction, and the shortening of the electric extraction path can also improve the current carrying capacity of the battery. According to one embodiment, the area of the first connecting portion of the electrode terminal is S, the area of the cover plate body is S1, and the relation of 0.18-0.7 is satisfied. The electrode terminals occupy the dimension proportion of the cover plate body, so that the welding area of the electric lead-out position of the cover plate assembly can be increased, and the current carrying capacity of the battery can be improved. According to one embodiment, the length of the first connecting portion of the electrode terminal is L, the length of the cover plate body is L1, and the relation of 0.2-L/L1-0.93 is satisfied. Through limiting the length proportion of the first connecting part of the electrode terminal and the cover plate body, the current transmission path is optimized, so that the current can be conducted between the electrode terminal and the cover plate body more efficiently and uniformly, the resistance loss is reduced, and the charge and discharge efficiency of the battery system is improved. According to one embodiment, the width of the first connecting portion of the electrode terminal is W, the width of the cover plate body is W1, and the relation 0.44≤W/W1≤0.85 is satisfied. By limiting the width ratio of the first connection part of the electrode terminal to the cap plate body, it is ensured that the electrode terminal and the cap plate body have proper contact area and connection strength, and uniformity and efficiency of current conduction can be remarkably improved. According to one embodiment, the battery cover plate assembly further comprises a first insulating member, the first insulating member is provided with a first through hole, the electrode terminal penetrates through the first through hole and is connected with the electrode core, and the first insulating member is located between the electrode terminal and the cover plate body and is used for enabling the electrode terminal to be electrically isolated from the cover plate body. Through setting up first insulating part, prevent the short circuit risk that produces because of unexpected contact between electrode terminal and the apron body, simultaneously, stable electrical isolation has ensure