电池单体、电池装置及用电设备
By installing a first and a second protective component at the pressure relief hole of the battery cell, the problem of poor pressure relief of the battery cell is solved, providing greater venting space and protection, and improving the performance 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
- 2025-06-18
- Publication Date
- 2026-07-17
AI Technical Summary
Existing battery cells are prone to poor pressure relief during the depressurization process, which leads to a decline in performance. This is mainly due to insufficient venting space and electrolyte corrosion of the pressure relief structure.
The pressure relief hole is covered by a first protective component, and the first protective component is fixed by a second protective component, which provides a larger venting space and at the same time prevents electrolyte from entering the pressure relief hole, thus protecting the pressure relief component.
It improves the pressure relief effect of individual battery cells, enhances performance, prevents electrolyte corrosion of pressure relief components, and ensures smooth pressure relief.
Smart Images
Figure CN224520109U_ABST
Abstract
Claims
1. A battery cell, characterized by, include: The outer casing includes a plurality of walls that enclose and form a receiving cavity, and at least one of the walls has a first pressure relief hole communicating with the receiving cavity; A pressure relief component is disposed within the first pressure relief hole; A first protective element covers the first pressure relief hole and is located on the side of the first pressure relief hole opposite to the receiving cavity; and The second protective member is disposed on the side of the first protective member away from the receiving cavity, and covers the wall portion with the first pressure relief hole and the first protective member. The second protective member has a second pressure relief hole that exposes a portion of the first protective member.
2. The battery cell of claim 1, wherein, In a projection plane parallel to the wall portion having the first pressure relief hole, the projection of the first pressure relief hole falls within the projection range of the first protective member.
3. The battery cell of claim 2, wherein, The first protective component includes a first covering area and a connecting area surrounding the outer periphery of the first covering area. Along the through direction of the first pressure relief hole, the first covering area is aligned with the first pressure relief hole, and the connecting area is used to connect with the wall portion surrounding the first pressure relief hole.
4. The battery cell of claim 3, wherein, An adhesive layer is provided between the connection area and the wall portion surrounding the first pressure relief hole, and the width of the adhesive layer is in the range of 3mm to 4mm in a direction perpendicular to the through direction of the first pressure relief hole.
5. The battery cell according to claim 4, characterized in that, A detection groove is provided on the side surface of the wall away from the receiving cavity. The detection groove is connected to the first pressure relief hole and is used to detect the airtightness of the outer shell. The adhesive layer has an opening corresponding to the detection groove.
6. The battery cell of claim 5, wherein, The wall portion having the first pressure relief hole also has an injection hole, and the detection groove is located on the side of the first pressure relief hole away from the injection hole.
7. The battery cell of claim 3, wherein, The width of the connection area along the first direction is not less than 6 mm, and the first direction is parallel to the wall portion where the first pressure relief hole is located.
8. The battery cell of claim 7, wherein, The width of the connection area along the second direction is not less than 6 mm. The second direction is parallel to the wall portion where the first pressure relief hole is located and perpendicular to the first direction.
9. The battery cell of claim 1, wherein, The second protective member includes a second covering area covering the first protective member and a third covering area covering the corresponding wall portion, the second covering area being disposed around the outer periphery of the second pressure relief hole.
10. The battery cell of claim 9, wherein, The width of the second coverage area along the first direction is 4mm to 6mm, and the first direction is parallel to the wall portion where the first pressure relief hole is located.
11. The battery cell of claim 10, wherein, The width of the second coverage area along the second direction ranges from 4mm to 6mm. The second direction is parallel to the wall portion where the first pressure relief hole is located and perpendicular to the first direction.
12. The battery cell of claim 11, wherein, In the first direction, the width of the second pressure relief hole is at least 2 mm larger than the width of the first pressure relief hole; and / or, in the second direction, the width of the second pressure relief hole is at least 2 mm larger than the width of the first pressure relief hole.
13. A battery device characterized by comprising: Includes the battery cell as described in any one of claims 1-12.
14. An electrical device, characterized by Includes the battery device as described in claim 13.