一种电池装置及用电装置
By incorporating a stress-relief structure on the side plate of the battery device and using insulating adhesives, the problem of connection breakage during vibration and thermal expansion of the battery device was solved, improving structural reliability and safety and reducing the risk of thermal runaway.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2026-05-06
- Publication Date
- 2026-07-17
AI Technical Summary
Existing battery devices are prone to breakage at the connection between the end plate and the side plate during vibration and thermal expansion, leading to problems such as loss of constraint of individual battery cells and thermal runaway, resulting in insufficient structural reliability.
A stress-relief structure is installed on the side plate to deflect and disperse stress lines, reduce stress concentration, and allow the side plate to undergo controllable elastic deformation at the stress-relief structure, reducing the chance of breakage at the connection. At the same time, insulating adhesives are used to cover electrical components to prevent the spread of thermal runaway.
This improves the structural reliability of the battery device, reduces the risk of breakage at the connection between the end plate and the side plate, lowers the probability of thermal runaway, and enhances the overall efficiency and safety of the battery device.
Smart Images
Figure CN224520020U_ABST
Abstract
Claims
1. A battery device, characterized by, It includes at least one battery cell assembly, the battery cell assembly comprising: Multiple battery cells, at least a portion of which are arranged along a first direction; At least two end plates, including a first end plate and a second end plate, wherein the first end plate and the second end plate are respectively disposed on opposite sides of the plurality of battery cells along the first direction, and both abut against the battery cells; At least two side plates are provided on each of the plurality of battery cells along the opposite sides of the second direction, and the side plates are connected to both the first end plate and the second end plate, and the second direction intersects the first direction; At least one of the side plates has a stress-relief structure.
2. The battery device according to claim 1, characterized by The area of the cross-section of the side plate at the location where the stress-relieving structure is provided is smaller than the area of the cross-section of the side plate at other locations, and the cross-section is perpendicular to the first direction.
3. The battery device of claim 2, wherein, The stress-relieving structure includes stress-relieving holes and / or stress-relieving notches formed in the side plate.
4. The battery device of claim 2, wherein The stress-relieving structure includes a stress-relieving notch formed in the side plate, the stress-relieving notch being located at at least one of the two ends of the side plate along a third direction, the first direction, the second direction and the third direction intersecting each other.
5. The battery device of claim 2, wherein The stress-relieving structure includes stress-relieving holes formed on the side plate. The stress-relieving holes are waist-shaped holes, and the length direction of the waist-shaped holes is consistent with the third direction. The first direction, the second direction, and the third direction intersect each other.
6. The battery device of claim 2, wherein The stress-relieving structure includes stress-relieving holes and / or stress-relieving notches formed on the side plate, and the corners of the inner surfaces of the stress-relieving holes and / or stress-relieving notches are set as concave arc surfaces.
7. The battery device of claim 1, wherein At least a portion of the stress-relieving structure has a distance between itself and both the first end plate and the second end plate along the first direction.
8. The battery device of claim 1, wherein At least two battery cell assemblies are arranged along the second direction, and two adjacent battery cell assemblies along the second direction are welded together by side plates facing each other.
9. The battery device of claim 1, wherein, At least two battery cell assemblies are arranged along the second direction, and the side plates of two adjacent battery cell assemblies along the second direction are connected to each other and each forms the stress-relief structure.
10. The battery device according to any one of claims 1 to 9, characterized by, The battery device also includes: At least one electrical component is disposed on one side of the battery cell and / or the end plate along a third direction and is electrically connected to the battery cell, wherein the first direction, the second direction and the third direction intersect each other; An insulating adhesive is bonded to one end face of the end plate along the third direction and covers at least a portion of the electrical component.
11. The battery device of claim 10, wherein, The at least one electrical component includes a busbar, through which the battery cells are electrically connected, and the insulating adhesive also covers at least a portion of the busbar closest to the end plate.
12. The battery device of claim 10, wherein, The at least one electrical component includes an output terminal connected to one end face of the end plate along the third direction and electrically connected to the battery cell closest to the end plate, the insulating adhesive covering at least a portion of the output terminal.
13. The battery device of claim 12, wherein, The output terminal includes a first part, a second part, and a third part. The first part extends in the first direction and is electrically connected to the battery cell. One end of the second part is connected to the first part in the third direction, and the other end extends relative to the first part toward the battery cell and is connected to the third part. The third part extends in the first direction and is connected to the end plate. The insulating adhesive covers the first part and the second part, and the insulating adhesive avoids the third part.
14. The battery device of claim 13, wherein, The battery device further includes an insulating connector connected to one end of the end plate along the third direction. The insulating connector has a recessed structure recessed towards the end plate along the third direction. The sidewalls of the recessed structure include a first sidewall and two second sidewalls. The two second sidewalls are arranged opposite each other along the second direction, and one end of the second sidewalls near the battery cell along the first direction is connected to both ends of the first sidewall. At least a portion of the second sidewalls extends into the recessed structure, and the third sidewalls are located within the recessed structure and connected to the bottom wall of the recessed structure.
15. The battery device of claim 10, wherein, The insulating adhesive also covers at least a portion of the surface of the end plate facing away from the battery cell along the first direction; and / or The insulating adhesive also covers at least a portion of the side plate's surface facing away from the battery cell.
16. The battery device of claim 10, wherein, The insulating adhesive includes at least one of glass fiber tape, mica paper, mica board, and ceramic fiber composite tape.
17. An electrical device, comprising: The electrical device includes a plurality of battery devices as described in any one of claims 1 to 16, the battery devices being used to store or provide electrical energy.