一种电池单体、电池装置和用电装置
By setting an adhesive reinforcement zone and grooves between the outer protective film of the battery cell and the end wall, the problem of the outer protective film lifting and falling off after bending is solved, thus improving the insulation and reliability of the battery cell.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2026-04-21
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the outer protective film of a battery cell is prone to peeling and falling off after bending, resulting in reduced insulation and reliability.
A battery cell structure was designed, in which the second protective part of the outer protective film is bonded and fixed to the end wall surface through an adhesive reinforcement area. The adhesive reinforcement area is used to increase the contact area or to set grooves to improve the bonding stability, and the bonding effect is enhanced by a roughened structure.
This effectively reduces the risk of the outer protective film peeling off at the end wall, improves the insulation and reliability of the battery cell, and ensures the stability and safety of the battery cell.
Smart Images
Figure CN224519980U_ABST
Abstract
Claims
1. A battery cell, characterized by, The battery cell includes: The housing includes a side wall and an end wall, the side wall and the end wall being in different planes, and the end wall including an adhesive reinforcement area; The outer protective film includes a first protective portion and a second protective portion. The first protective portion covers at least a portion of the side wall surface. The second protective portion is connected to the first protective portion and bent relative to the first protective portion. The second protective portion is bonded and fixed to the end wall surface through the adhesive reinforcement area.
2. The battery cell of claim 1, wherein, The bonding reinforcement area is provided with grooves, and the second protective part is bonded and fixed to the end wall surface through the grooves.
3. The battery cell of claim 2, wherein, The bonding reinforcement area includes two first side areas and two second side areas. The two first side areas are spaced apart. Each second side area is located between the two first side areas and connects to the two first side areas respectively. The two second side areas are spaced apart. The length of the first side area is greater than the length of the second side area. At least one of the first side area and the second side area is provided with the groove.
4. The battery cell of claim 3, wherein, The groove located in the first side area extends along the length direction of the first side area, and / or the groove located in the second side area extends along the length direction of the second side area.
5. The battery cell of claim 1, wherein, The bonding reinforcement area includes a textured structure, and the second protective part is bonded and fixed to the end wall surface through the textured structure.
6. The battery cell of claim 1, wherein, The outer protective film includes an adhesive layer and a protective layer stacked together, and the outer protective film is bonded and fixed to the end wall surface through the adhesive layer.
7. The battery cell of claim 6, wherein, The thickness of the protective layer is greater than or equal to 50 μm and less than or equal to 200 μm.
8. The battery cell of claim 1, wherein, The thickness of the outer protective film is greater than or equal to 150 μm and less than or equal to 300 μm.
9. The battery cell according to any one of claims 1 to 8, characterized in that The end wall surface also includes a central exposed area, the adhesive reinforcement area is arranged around the central exposed area, and the second protective part avoids the central exposed area.
10. The battery cell of claim 9, wherein, The battery cell also includes electrode terminals, which are disposed in the central exposed area.
11. The battery cell of claim 9, wherein, The battery cell includes a pressure relief mechanism, which is located in the central exposed area.
12. The battery cell according to any one of claims 1 to 8, characterized in that, The battery cell includes an electrode assembly, the housing forms a receiving space, the electrode assembly is disposed within the receiving space, and the end wall and the side wall face away from the receiving space.
13. A battery device characterized by comprising: The battery device includes a battery cell as described in any one of claims 1 to 12.
14. An electrical device, comprising: The electrical device includes the battery device as described in claim 13.