WO-2026090791-A1 - BATTERY CELL, BATTERY DEVICE AND ELECTRIC DEVICE

Abstract

A battery cell, a battery device and an electric device. The battery cell comprises a casing component, an electrode component and terminal components, wherein the casing component comprises a first casing wall. The terminal components each comprise a terminal body, a clamping structure and an insulating sealing structure, wherein the clamping structure comprises a body portion and a clamping member. The clamping member comprises a first clamping portion and a second clamping portion, wherein the first clamping portion and the second clamping portion clamp the terminal body by means of the insulating sealing structure; the thickness of the first clamping portion is different from the thickness of the body portion; the thickness of the second clamping portion is different from the thickness of the body portion; and the thickness of the one having the greatest thickness among the first clamping portion, the second clamping portion and the body portion is greater than the thickness of the first casing wall. In the technical solution of the embodiments of the present application, by means of adjusting the thickness of the first casing wall, the thickness of the first clamping portion, the thickness of the second clamping portion, or the thickness of the body portion, the insulation performance and reliability of the terminal components are improved, thereby being conducive to improving the reliability of the battery cell.

Inventors

• HUANG, Biao
• CAO, Jierui
• LIN, Wenfa
• LUO, Weijie
• HU, Yuanren
• CHEN, Congsheng

Assignees

• 宁德时代新能源科技股份有限公司

Dates

Publication Date

20260507

Application Date

20241028

Claims (20)

1. A battery cell, comprising: The housing component includes a first housing wall; The electrode components are housed within the housing components; An electrode post component is disposed on the first shell wall and includes an electrode post body, a clamping structure, and an insulating sealing structure; the electrode post body is connected to the electrode component; the clamping structure surrounds the electrode post body and includes a body portion and a clamping member, the body portion is disposed around the outer periphery of the clamping member and is connected to the first shell wall, the clamping member is disposed on the body portion, and the clamping member includes a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion clamping the electrode post body through the insulating sealing structure; The thickness of the first clamping part is different from that of the main body, the thickness of the second clamping part is different from that of the main body, and the thickness of the one with the largest thickness among the first clamping part, the second clamping part, and the main body is greater than the thickness of the first shell wall.
2. According to claim 1, the battery cell is wherein the first clamping portion is connected to the side of the second clamping portion away from the electrode component, and the insulating sealing structure is clamped between the first clamping portion and the electrode body, and between the second clamping portion and the electrode body.
3. According to claim 2, the battery cell is integrally formed from the body portion, the first clamping portion, and the second clamping portion.
4. According to claim 2, the battery cell is wherein the body portion and the first shell wall are integrally formed; or, the body portion and the first shell wall are welded together.
5. According to claim 4, the battery cell is integrally formed from the body portion, the first clamping portion, and the second clamping portion.
6. According to claim 2, the thickness of the body portion is greater than the thickness of the first shell wall.
7. According to claim 6, the thickness of the second clamping portion is less than the thickness of the body portion.
8. According to claim 7, the thickness of the second clamping portion is greater than half the thickness of the body portion.
9. According to claim 6, the thickness of the first clamping portion is less than the thickness of the body portion, and/or the thickness of the first clamping portion is less than the thickness of the second clamping portion.
10. The battery cell according to any one of claims 7-9, wherein the first clamping portion and the second clamping portion are stamped portions.
11. According to claim 6, the thickness of the second clamping portion is greater than the thickness of the body portion.
12. According to claim 11, the thickness of the first clamping portion is greater than the thickness of the body portion, and/or the thickness of the first clamping portion is less than the thickness of the second clamping portion.
13. According to claim 11 or 12, the battery cell is wherein the first clamping part and the body part are stamped parts.
14. According to claim 6, the thickness of the second clamping portion is greater than the thickness of the first shell wall.
15. According to claim 6, the thickness of the first clamping portion is greater than the thickness of the first shell wall.
16. According to any one of claims 6-15, the thickness of the structure with the smaller thickness between the body portion and the second clamping portion is greater than 0.5 mm and less than 5 mm, or equal to 0.5 mm or 5 mm.
17. According to claim 2, the thickness of the body portion is less than the thickness of the first shell wall.
18. According to claim 17, the thickness of the second clamping portion is greater than the thickness of the body portion.
19. According to claim 18, the thickness of the body portion is greater than half the thickness of the second clamping portion.
20. According to claim 17, the thickness of the second clamping portion is less than the thickness of the body portion.

Description

Battery cells, battery packs, and electrical devices Technical Field This application relates to the field of batteries, specifically to a battery cell, a battery device, and an electrical device. Background Technology Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development. Poor sealing between the terminals and the casing of the battery cells in related technologies leads to reduced reliability of the battery cells. Summary of the Invention In view of the above problems, this application provides a battery cell, a battery device, and an electrical device that can improve the reliability of use. In a first aspect, this application provides a battery cell, comprising: a housing component, the housing component including a first housing wall; an electrode component, the electrode component being housed within the housing component; and a terminal component, the terminal component being disposed on the first housing wall and including a terminal body, a clamping structure, and an insulating sealing structure; the terminal body being connected to the electrode component; the clamping structure surrounding the terminal body and including a body portion and a clamping member, the body portion being disposed around the outer periphery of the clamping member and connected to the first housing wall, the clamping member being disposed on the body portion, the clamping member including a first clamping portion and a second clamping portion, the first clamping portion and the second clamping portion clamping the terminal body through the insulating sealing structure; wherein, the thickness of the first clamping portion is different from that of the body portion, the thickness of the second clamping portion is different from that of the body portion, and the thickness of the largest of the three components—the first clamping portion, the second clamping portion, and the body portion—is greater than the thickness of the first housing wall. In the technical solution of this application embodiment, by setting a clamping structure and using it in conjunction with an insulating and sealing structure, the electrode post body can be fixedly installed on the clamping structure, and insulation and sealing between the clamping structure and the electrode post body can be achieved. The main body of the clamping structure is used to connect with the first shell wall, and the first clamping part and the second clamping part of the clamping structure are used to clamp the electrode post body and the insulating and sealing structure. Therefore, as needed, by adjusting the thickness of the first shell wall, the thickness of the first clamping part, the thickness of the second clamping part, or the thickness of the main body, the insulation performance and reliability of the electrode post component can be further improved, the risk of short circuit problems or other electrical safety accidents can be reduced, and the probability of electrolyte seepage from the inside of the shell component and moisture and dust entering the shell component can be reduced, which is beneficial to improving the reliability of the battery cell. In some embodiments, the first clamping portion is connected to the side of the second clamping portion away from the electrode component, and the insulating sealing structure is clamped between the first clamping portion and the electrode body, and between the second clamping portion and the electrode body. In the above technical solution, the insulating sealing structure can be arranged around the outer periphery of the electrode body, with a portion of the insulating sealing structure clamped between the first clamping portion and the electrode body, and another portion clamped between the second clamping portion and the electrode body, thereby achieving insulation and sealing between the clamping structure and the electrode body. In some embodiments, the main body, the first clamping part, and the second clamping part are integrally formed. In the above technical solution, the clamping structure is simple in structure, and the main body, the first clamping part, and the second clamping part can be constructed as an integral part. This not only eliminates the connection steps of the three parts, which is beneficial to improving production efficiency, but also improves the structural strength of the clamping structure. This can improve the reliability of the insulation and sealing of the insulating and sealing structure, so that the insulating and sealing structure can meet the required insulation and sealing requirements. In some embodiments, the body portion and the first shell wall are integrally formed; or, the body po