Heating structure and battery
By designing a heating structure on the battery cell, including a heating layer and a protective layer, the safety hazard of thermal runaway during battery heating is solved, achieving efficient heating and improved safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CONTEMPORARY SYNLAND TECHNOLOGY CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-17
AI Technical Summary
Existing batteries pose a safety hazard of thermal runaway during the heating process, especially when the heating film is broken down by a large current, the temperature rises sharply and leads to overall thermal runaway.
A heating structure is designed, including a heating layer and a protective layer. The heating layer heats the battery cells, and a protective layer is set between the heating layer and the battery cells. The protective layer consists of an insulating layer and a heat insulation layer, which is used to block heat transfer when the temperature of the heating layer rises sharply, thereby reducing the probability of thermal runaway.
It effectively improves the heating efficiency of individual battery cells, while reducing the probability of thermal runaway caused by a sharp increase in the temperature of the heating layer, thus enhancing the safety performance of the battery.
Smart Images
Figure CN224521208U_ABST
Abstract
Claims
1. A heating structure for heating a single battery cell, characterized in that, The heating structure includes: The heating layer includes a heating surface facing the battery cell in the thickness direction, and a conductor portion is disposed inside the heating layer for generating heat; A protective layer is attached to one side of the heating surface on the heating layer; The conductor portion is electrically connected to the battery cell, and the protective layer includes an insulating layer and a heat insulation layer stacked along the thickness direction. The projections of the insulating layer, the heat insulation layer, and the conductor portion in the thickness direction are at least partially overlapping.
2. The heating structure according to claim 1, characterized in that The heating layer includes heating areas and connecting areas arranged side by side along a first direction; The heating layer has a first through hole extending along the thickness direction in at least a portion of the connection area. The size of the first through hole in the second direction is larger than its size in the first direction. The first direction, the second direction, and the thickness direction intersect each other.
3. The heating structure of claim 2, wherein, The insulating layer includes insulating portions arranged side by side along the first direction, wherein the projection of the insulating portions in the thickness direction overlaps with the projection of the heating zone in the first direction; The surface roughness of the heating surface is lower than the surface roughness of the insulating part on the side away from the heating layer.
4. The heating structure according to claim 3, characterized in that The insulating layer further includes a first connecting portion connected to the insulating portion, wherein the projection of the first connecting portion in the thickness direction overlaps with the projection of the connecting area in the thickness direction; The first connecting portion is provided with a second through hole extending along the thickness direction. The size of the second through hole in the second direction is larger than its size in the first direction. The second through hole is provided corresponding to the first through hole.
5. The heating structure of claim 2, wherein, The heat insulation layer includes heat insulation portions arranged side by side along the first direction, wherein the projection of the heat insulation portions in the thickness direction overlaps with the projection of the heating zone in the thickness direction.
6. The heating structure of claim 5, wherein, The heat insulation layer further includes a second connecting portion connected to the heat insulation part, wherein the projection of the second connecting portion in the thickness direction overlaps with the projection of the connecting area in the first direction; The second connecting portion is provided with a third through hole that extends along the thickness direction. The size of the third through hole in the second direction is larger than its size in the first direction. The third through hole is provided in correspondence with the first through hole.
7. The heating structure of claim 2, wherein, The heating layer includes a plurality of heating zones and a plurality of connecting zones, wherein the heating zones and the connecting zones are distributed alternately along the first direction; The first through holes of adjacent connection areas are offset in the second direction.
8. The heating structure of claim 1, wherein, The heating structure further includes a temperature sensor, which is disposed on the side of the heating layer away from the protective layer along the thickness direction. The projection of the temperature sensor in the thickness direction at least partially overlaps with the projection of the conductor portion in the thickness direction.
9. A battery, characterized in that, include: Multiple battery cells, wherein the multiple battery cells are arranged sequentially along a first direction; The heating structure according to any one of claims 1-8, wherein the heating structure is connected to one side of the battery cell, the heating structure covers a plurality of the battery cells in the first direction, and the first direction intersects the thickness direction; The heating structure is bonded and attached to each of the battery cells, and the two ends of the heating structure in the first direction are respectively connected to the two ends of the plurality of battery cells in the first direction.
10. The battery according to claim 9, characterized in that, The heating structure includes a first region and a second region arranged side by side along the first direction. The projection of the first region in the thickness direction corresponds to a single battery cell, and the projection of the second region in the thickness direction is located between adjacent battery cells. The heating structure has a through hole structure in the second region that extends along the thickness direction. The size of the through hole structure in the second direction is larger than its size in the first direction. The first direction, the second direction, and the thickness direction intersect each other.