集电板和包括集电板的电芯
By designing an impact-resistant structure in the battery cell with a notched current collector plate welded to the electrodes and casing, the mechanical rigidity and stability issues of the battery cell under vibration and impact are solved, thus improving the safety of the secondary battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SK ON CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing secondary battery cells are prone to deterioration or damage under vibration and impact, leading to safety hazards and insufficient mechanical rigidity and stability.
Design a current collector including a base surface and a partition extending from the edge of the base surface. The partition has notches to enhance impact resistance and is connected to the electrode and the housing by welding to form an impact-resistant structure.
This improves the mechanical rigidity and stability of the battery cell, reduces the risk of short circuits and fires caused by external impacts, and enhances the safety of secondary batteries.
Smart Images
Figure CN224519994U_ABST
Abstract
Claims
1. A collector plate characterized by include: The base surface has a disk shape; A partition extends along the edge of the base surface in a direction away from the base surface; as well as At least one gap is formed in the partition.
2. The current collector according to claim 1, characterized in that, The current collector contains copper.
3. The current collector according to claim 1, characterized in that, The base surface includes at least one groove extending through the base surface.
4. The current collector according to claim 1, characterized in that, The base surface includes at least one electrode welding portion for welding with an electrode.
5. The current collector according to claim 1, characterized in that, The partition extends in one direction from the edge of the base surface.
6. The current collector according to claim 1, characterized in that, The notch is formed in a conical shape in the direction away from the base surface.
7. The current collector according to claim 1, characterized in that, The depth of the notch is 0.1 to 0.5 times the extension length of the partition.
8. The current collector according to claim 1, characterized in that, A plurality of the notches are formed at predetermined intervals on the partition.
9. The current collector according to claim 1, characterized in that, The partition extends from the edge of the base surface in two opposite directions.
10. The current collector according to claim 1, characterized in that, The partition further includes at least one housing weld portion for welding to the housing. The welded portion of the shell is spaced apart from the notch.
11. An electric cell characterized by include: The housing includes a cylindrical sidewall portion having an internal accommodating space; Electrode assembly, housed within the housing space; as well as Current collector, The current collector is electrically connected to the electrode assembly. The current collector includes: The base surface has a disk shape; A partition extending along the edge of the base surface in a direction away from the base surface; and At least one gap is formed in the partition.
12. The battery cell according to claim 11, characterized in that, The base surface of the current collector is connected to the electrode assembly, thereby electrically connecting the current collector and the electrode assembly to each other.
13. The battery cell according to claim 12, characterized in that, The electrode assembly includes a first electrode and a second electrode, the first electrode including a first uncoated portion and the second electrode including a second uncoated portion. The second uncoated portion is connected to the base surface.
14. The battery cell according to claim 11, characterized in that, The current collector is electrically connected to the housing. The partition of the current collector is connected to the side wall of the housing, thereby electrically connecting the current collector and the housing to each other.
15. The battery cell according to claim 14, characterized in that, The partition is welded to the side wall portion for connection.