电池单体、电池装置及用电装置
By setting a protective plate and flow channels inside the insulating film, the problems of high electrolyte flow resistance and uneven penetration in the battery cell are solved, improving the electrolyte wetting efficiency and the electrochemical performance of the battery cell, and extending its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-07-17
AI Technical Summary
Existing battery cells suffer from problems such as high flow resistance, uneven penetration, and poor wetting during electrolyte flow, leading to decreased electrochemical performance and shortened service life.
A protective plate is installed inside the insulating membrane. The protective plate has flow channels for electrolyte flow and bears the gravity load of the electrode assembly, maintains the gaps in the insulating membrane, provides a directional permeation path, and reduces flow resistance.
It improves the wetting efficiency of the electrolyte, inhibits the formation of purple spots, and extends the cycle life and electrochemical performance of the battery cells.
Smart Images
Figure CN224520144U_ABST
Abstract
Claims
1. A battery cell, characterized by, include: The outer shell has a receiving cavity; Electrode assembly is disposed in the receiving cavity; An insulating film is located between the electrode assembly and the housing. The insulating film includes a first film body and a second film body disposed around the outer periphery of the first film body. The first film body is disposed opposite to the electrode assembly along a first direction, and a gap is provided at the connection between the first film body and the second film body. A protective plate is located between the first membrane and the electrode assembly. The protective plate has a flow channel configured to communicate the space between the electrode assembly and the insulating membrane and the housing via the gap.
2. The battery cell according to claim 1, characterized in that, The inlet of the flow channel is located at the edge of the protective plate.
3. The battery cell according to claim 2, characterized in that, The flow channel includes a first flow channel, which is connected to the inlet; The protective plate has a flow channel extending along the thickness direction of the protective plate, and the first membrane body covers one side of the flow channel to form the first flow channel.
4. The battery cell according to claim 3, characterized in that, The flow channel includes a second flow channel, which connects the inlet and the first flow channel; The protective plate is spaced apart from the insulating film along the second direction, and the edge of the protective plate along the second direction forms a second flow channel with the insulating film, the second direction being perpendicular to the first direction.
5. The battery cell according to claim 4, characterized in that, The flow channel extends along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.
6. The battery cell according to claim 5, characterized in that, The protective plate includes a plurality of flow guide groove groups, each flow guide groove group including a first flow guide groove and a second flow guide groove. The first flow guide groove and the second flow guide groove are arranged opposite to each other along the third direction, and the plurality of flow guide groove groups are spaced apart along the second direction.
7. The battery cell according to claim 6, characterized in that, In the third direction, the width of the first guide channel is greater than the width of the second guide channel; In the second direction, the first guide channel and the second guide channel are alternately arranged.
8. The battery cell according to claim 3, characterized in that, The protective plate includes a connecting part for connecting the feeding mechanism. The connecting part is spaced apart from the guide channel and has a first positioning hole.
9. The battery cell according to claim 8, characterized in that, The connecting portions are located at both ends of the protective plate along a second direction, which is perpendicular to the first direction; The flow guide grooves are disposed on both sides of the connecting part along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.
10. The battery cell according to claim 8, characterized in that, The first membrane body is provided with a second positioning hole, which is arranged opposite to the first positioning hole along the first direction.
11. The battery cell according to claim 3, characterized in that, The outer shell includes a wall portion, which is disposed along the first direction on the side of the first membrane body opposite to the protective plate; The battery cell also includes a pressure relief mechanism, which is disposed on the wall portion.
12. The battery cell according to claim 11, characterized in that, The wall portion has a protruding part on the surface facing the first membrane. A portion of the protruding part presses against the protective plate through the first membrane. The protruding part is spaced apart from the pressure relief mechanism. In the first direction, a portion of the protruding part is correspondingly arranged with the guide groove.
13. The battery cell according to claim 12, characterized in that, The wall portion has an inwardly recessed portion on the surface opposite to the first membrane body, and the recessed portion is correspondingly provided with the convex portion.
14. The battery cell according to claim 12, characterized in that, The wall portion is provided with a plurality of protrusions, which are located on both sides of the pressure relief mechanism along a second direction. The protrusions extend along the second direction, which is perpendicular to the first direction.
15. The battery cell according to claim 12, characterized in that, The battery cell also includes a pad located between the protective plate and the first membrane, wherein at least a portion of the pad is disposed opposite to the flow channel in the first direction.
16. The battery cell according to claim 15, characterized in that, The battery cell includes multiple pads, and in a second direction, the multiple pads are located on both sides of the pressure relief mechanism, and the second direction is perpendicular to the first direction; The protective plate includes a plurality of the flow channels, and in the first direction, the pad is disposed corresponding to at least two of the flow channels.
17. The battery cell according to claim 11, characterized in that, The protective plate is provided with clearance holes, which are correspondingly arranged with the pressure relief mechanism in the first direction.
18. The battery cell according to claim 11, characterized in that, The protective plate is provided with a first weak part. In the first direction, the first weak part is correspondingly arranged with the pressure relief mechanism. The first weak part is configured to rupture when the internal pressure or temperature of the battery cell reaches a threshold.
19. The battery cell according to claim 11, characterized in that, The first membrane has a second weak portion, which is disposed in the first direction in a manner corresponding to the pressure relief mechanism. The second weak portion is configured to rupture when the internal pressure or temperature of the battery cell reaches a threshold.
20. A battery device, characterized by It includes multiple battery cells according to any one of claims 1 to 19.
21. An electrical device, comprising: Includes a battery cell according to any one of claims 1 to 19 or a battery device according to claim 20, wherein the battery cell or the battery device is used to store or provide electrical energy.