CN-224232879-U - Battery monomer, battery device and electric equipment

Abstract

The battery unit comprises a shell, an electrode assembly and a pole column assembly, wherein the shell is provided with a containing cavity and comprises a first wall, the electrode assembly comprises a pole piece body and a pole lug connected with the pole piece body, the pole column assembly comprises a switching structure, a pole column body and a first insulating piece, the switching structure comprises a switching top surface which is exposed and faces away from the containing cavity, the first insulating piece comprises a circumferential surface which surrounds the pole column body and is connected with the switching top surface, at least part of the circumferential surface extends from the switching top surface along a first direction, the total height of the circumferential surface along the first direction is H1, the total height of the first insulating piece along the first direction from the switching top surface is H2, and H1/H2 is more than or equal to 0.85 and less than or equal to 1. Therefore, the total height of the circumferential surface of the first insulating piece is larger, so that the circumferential surface of the first insulating piece can be clamped more easily and stably, the pole assembly is clamped and mounted on the shell, and the assembly efficiency of the battery cell is improved.

Inventors

• HUANG BIAO
• CHEN CONGSHENG
• DONG ZIYAN
• CAO JIERUI
• LIN WENFA

Assignees

• 宁德时代新能源科技股份有限公司

Dates

Publication Date

20260512

Application Date

20250416

Claims (20)

1. 1. A battery cell, comprising: a housing having a receiving chamber and including a first wall; the electrode assembly comprises a pole piece body and a pole lug connected with the pole piece body; The pole assembly comprises a switching structure, a pole body and a first insulating piece, wherein the switching structure is arranged on the first wall, the pole body is arranged on the switching structure, the first insulating piece is arranged on the switching structure and isolates the switching structure from the pole body, the switching structure comprises a switching top surface which is exposed and deviates from the accommodating cavity, the first insulating piece comprises a circumferential surface which surrounds the pole body and is connected with the switching top surface, at least part of the circumferential surface extends from the switching top surface along a first direction, the total height of the circumferential surface along the first direction is H1, and the total height of the first insulating piece from the switching top surface along the first direction is H2, and H1/H2 is more than or equal to 0.85 and less than or equal to 1.
2. 2. The battery cell of claim 1, wherein H1 is satisfied, and H1 is greater than or equal to 1.5mm.
3. 3. The battery cell of claim 1, wherein the first insulating member is recessed from the circumferential surface to form a groove.
4. 4. The battery cell of claim 3, wherein the circumferential face includes a circumferential edge distal from the transfer top face, the groove being closer to the circumferential edge relative to the transfer top face.
5. 5. The battery cell of claim 1, wherein the first insulator includes an insulator end surface opposite the adapter top surface, the H2 being a distance between the insulator end surface and the adapter top surface, the insulator end surface transitioning with the circumferential surface arc.
6. 6. The battery cell of claim 5, wherein the post body protrudes from the insulating end face.
7. 7. The battery cell of claim 1, wherein the adapter structure comprises a first adapter and a second adapter connected to the first adapter, the first adapter disposed on the first wall, the second adapter pressing against the pole body through the first insulator, the second adapter comprising the adapter top surface, the first insulator wrapping at least a portion of the second adapter and isolating the first insulator from the pole body.
8. 8. The battery cell of claim 7, wherein the post assembly includes a seal disposed between the first adapter and the post body, the seal sealing a gap between the first adapter and the post body.
9. 9. The battery cell of claim 7, wherein the post assembly includes a second insulator disposed on the first adapter, the second insulator being located in the receiving chamber and disposed away from the second adapter.
10. 10. The battery cell of claim 9, wherein a side of the second insulating member facing the pole piece body is provided with an anti-scalding portion, and along a second direction, the anti-scalding portion is adjacent to a side of the second insulating member facing the pole body, the second direction intersecting the first direction.
11. 11. The battery cell of claim 10, wherein the burn-out prevention portion comprises formed by localized thickening of the second insulator.
12. 12. The battery cell as recited in claim 11, wherein the first adapter is provided with a first through hole and includes an adapter bottom surface connected to a hole wall of the first through hole, the first through hole penetrates through the first adapter along the first direction, the adapter bottom surface faces the pole piece body, the first adapter is recessed from the adapter bottom surface to form a first sink, the first sink is communicated with the first through hole, the second insulator is at least partially embedded in the first sink, a portion of the second insulator that is locally thickened corresponds to the first sink, and the pole body is inserted in the first through hole.
13. 13. The battery cell as recited in claim 11, wherein the second insulator is provided with a second through hole and a second countersink, the second through hole penetrates through the second insulator in the first direction, the second countersink is located on one side of the second insulator facing the pole piece body and is communicated with the second through hole, a protruding block is arranged in the second countersink, the protruding block corresponds to a locally thickened portion of the second insulator, the anti-scalding portion comprises the protruding block, and the pole body penetrates through the second through hole.
14. 14. The battery cell of claim 13, wherein the second through hole includes a straight edge and a curved edge connected to the straight edge, the number of the protrusions is plural, and the protrusions are spaced apart along the extending direction of the straight edge.
15. 15. The battery cell as recited in claim 14, wherein the number of the straight edges and the number of the curved edges are two, the two straight edges are disposed opposite to each other, each of the curved edges connects the two straight edges, and a plurality of the bumps are disposed on one side of each of the straight edges.
16. 16. The battery cell of claim 10, wherein the burn-out prevention portion comprises a heat resistant member disposed on the second insulating member.
17. 17. The battery cell of claim 16, wherein the second insulator is provided with a second through hole that extends through the second insulator in the first direction, the heat resistant member is located at an edge of the second through hole, and the post body is disposed through the second through hole.
18. 18. The battery cell of claim 17, wherein the second through hole includes a straight edge and a curved edge connected to the straight edge, the number of the heat-resistant members is plural, and the plural heat-resistant members are arranged at intervals along the direction in which the straight edge extends.
19. 19. The battery cell as recited in claim 18, wherein the number of the straight edges and the number of the curved edges are two, the two straight edges are disposed opposite to each other, each of the curved edges connects the two straight edges, and a plurality of the heat-resistant members are disposed on one side of each of the straight edges.
20. 20. The battery cell of claim 9, wherein the battery cell comprises an insulating support disposed inside the first wall, the insulating support covering the second insulating member and the first adapter member, the insulating support having a via hole through which the tab is disposed.

Description

Battery monomer, battery device and electric equipment Technical Field The application relates to the technical field of batteries, in particular to a battery monomer, a battery device and electric equipment. Background Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding. In the related art, the battery cell includes casing and utmost point post subassembly, and utmost point post subassembly detachably installs on the casing, and in the installation of utmost point post subassembly, utmost point post subassembly is difficult to be got by the clamp, leads to the installation effectiveness of utmost point post subassembly lower. Disclosure of utility model The application provides a battery monomer, a battery device and electric equipment, which can improve the assembly efficiency of the battery monomer. The battery cell comprises a shell, an electrode assembly and a pole column assembly, wherein the shell is provided with a containing cavity and comprises a first wall, the electrode assembly comprises a pole plate body and a pole lug connected with the pole plate body, the pole column assembly comprises a switching structure, a pole column body and a first insulating piece, the switching structure is arranged on the first wall, the pole column body is arranged on the switching structure, the first insulating piece is arranged on the switching structure and isolates the switching structure and the pole column body, the switching structure comprises a switching top surface exposed and faces away from the containing cavity, the first insulating piece comprises a circumferential surface surrounding the pole column body and connected with the switching top surface, the circumferential surface at least partially extends from the switching top surface along a first direction, the height of the circumferential surface along the first direction is H1, and the total height of the first insulating piece along the first direction from the switching top surface is H2, and is more than or equal to 0.85 and less than or equal to 1/H2. In the battery cell of the embodiment of the application, when the ratio of the total height of the circumferential surface of the first insulating piece to the total height of the first insulating piece is H1/H2 and H1/H2 is less than or equal to 0.85 and less than or equal to 1, the total height of the circumferential surface of the first insulating piece is larger, so that the circumferential surface of the first insulating piece can be clamped more easily and stably, the pole assembly can be clamped and mounted on the shell, and the assembly efficiency of the battery cell is improved. In certain embodiments, the H1 is satisfied, with H1 being 1.5mm or more. In the above embodiment, H1, in the above range, makes the circumferential surface of the first insulating member have a sufficient height for clamping, facilitating clamping and mounting of the pole assembly to the housing. In certain embodiments, the first insulating member is recessed from the circumferential surface to form a groove. In the above embodiment, the recess may reduce the material consumption of the first insulating member, and reduce the manufacturing cost of the first insulating member. In certain embodiments, the circumferential surface includes a circumferential edge distal from the transfer top surface, and the groove is closer to the circumferential edge relative to the transfer top surface. In the above embodiments, the recess is closer to the circumferential edge than the transfer top surface, such that the circumferential surface of the first insulator has a larger continuous surface in the first direction, facilitating the clamping of the pole assembly. In certain embodiments, the first insulator comprises an insulator end surface opposite the adapter top surface, the H2 is a distance between the insulator end surface and the adapter top surface, and the insulator end surface transitions with the circumferential surface arc. In the embodiment, the arc transition between the insulating end surface and the circumferential surface makes the first insulating part easier to manufacture and shape, and is beneficial to reducing the manufacturing cost of the first insulating part. In certain embodiments, the post body protrudes from the insulating end face. In the above embodiments, the pole body is easily connected to an external electrical structural member. In cert