电池单体、电池装置及用电装置
By designing raised and/or recessed structures on the current collector, the connection area between the current collector and the active material layer is increased, which solves the problem of poor adhesion between the current collector and the active material layer and improves the safety performance of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-07-17
AI Technical Summary
In existing battery devices, the adhesion between the current collector and the active material layer is poor, and the active material layer is prone to detachment, posing a safety hazard.
Forming raised and/or recessed structures on the current collector increases the connection area between the current collector and the active material layer, thereby improving adhesion.
It improves the adhesion between the current collector and the active material layer, reduces the shedding of the active material layer, and enhances the safety performance of the battery.
Smart Images
Figure CN224519878U_ABST
Abstract
Claims
1. A battery cell, characterized by, The battery cell includes an electrode assembly, which includes: A current collector having a connecting structure formed thereon, the connecting structure being a protruding structure and / or a recessed structure; An active material layer is disposed on the current collector and covers the connection structure.
2. The battery cell according to claim 1, characterized in that, Multiple of the connection structures are spaced apart on the current collector.
3. The battery cell according to claim 2, characterized in that, The spacing between two adjacent connecting structures ranges from 1 mm to 2000 mm.
4. The battery cell according to claim 3, characterized in that, The spacing between two adjacent connecting structures ranges from 10 mm to 50 mm.
5. The battery cell according to claim 1, characterized in that, The current collector has a sheet-like structure, and the ratio of the size of the connecting structure to the thickness of the current collector ranges from 0.1 to 0.3 along the thickness direction of the current collector.
6. The battery cell according to claim 1, characterized in that, The recessed structure is tapering in shape, and its size gradually increases along the concave direction.
7. The battery cell according to claim 6, characterized in that, The cross-section of the recessed structure along the concave direction is trapezoidal.
8. The battery cell according to claim 1, characterized in that, The radial dimension of the recessed structure ranges from 5 micrometers to 1000 micrometers.
9. The battery cell according to claim 1, characterized in that, The protruding structure is gradually expanding, and its size gradually increases along the protrusion direction.
10. The battery cell according to claim 9, characterized in that, The cross-section of the protruding structure along the protrusion direction is trapezoidal.
11. The battery cell according to claim 1, characterized in that, The connection structure is formed on the two opposite sides of the current collector, and the active material layer is disposed on both sides of the current collector.
12. The battery cell of claim 1, wherein, The electrode assembly includes a positive electrode and a negative electrode, which are spaced apart. The positive electrode includes a first current collector and a positive active material layer, the first current collector forms a first recessed structure, and the positive active material layer is connected to the first recessed structure. The negative electrode sheet includes a second current collector and a negative electrode active material layer. The second current collector forms a second recessed structure, and the negative electrode active material layer is connected to the second recessed structure.
13. The battery cell according to claim 12, characterized in that, The depth of the first recessed structure ranges from 0.1 micrometers to 6 micrometers; the depth of the second recessed structure ranges from 0.1 micrometers to 15 micrometers.
14. A battery device characterized by comprising: The battery device comprises the battery cell according to any one of claims 1-13.
15. An electrical device, comprising: The electrical device includes the battery device as described in claim 14.