Battery Module Heat Insulation Cushioning for Thermal Runaway
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Solution Overview
Problem
Conventional battery modules lack effective thermal runaway protection measures, leading to rapid heat spread and chain reactions among cells, affecting safety and performance.
Innovation Solution
Incorporating a heat insulation cushion assembly between adjacent cells and a first heat insulating member on top of the cell assembly, featuring a second heat insulating member and cushion members to absorb deformation and isolate high-temperature electrolyte, reducing heat transfer and preventing chain reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no heat insulation measures are taken between adjacent cells, then the battery module structure is simple and easy to manufacture, but heat generated by thermal runaway spreads rapidly between cells causing chain reactions
Solution Approach 1:
The battery module is divided into independent cell units, each surrounded by heat insulation cushions and interspace heat insulating plates. This segmentation isolates thermal runaway in individual cells, preventing heat spread to adjacent cells while maintaining overall module functionality.
Solution Approach 2:
Heat insulation cushions and interspace heat insulating plates are introduced as intermediary elements between adjacent cells. These intermediaries act as thermal barriers that block heat transfer pathways, preventing chain reactions while allowing the cells to remain closely packed for space efficiency.
2Reliability
If heat insulation measures are added between cells, then thermal runaway protection is improved, but the battery module volume increases
Solution Approach 1:
Thin heat insulation cushions and film-based interspace heat insulating plates are used between cells. These thin thermal barrier layers provide effective heat isolation while occupying minimal space, thus protecting against thermal runaway without significantly increasing the battery module volume.
Solution Approach 2:
Heat insulation measures are applied locally at critical interfaces between cells rather than uniformly throughout the entire module. The heat insulation cushions are positioned specifically at cell contact points, and interspace heat insulating plates are placed only in gaps between cells, providing targeted thermal protection with minimal volume addition.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances thermal protection, improving operational reliability and stability by minimizing heat spread and preventing thermal runaway propagation, thus extending the service life of the battery module.
Implementation Method 1
a heat insulation cushion assembly between two adjacent cells. The heat insulation cushion assembly includes a second heat insulating member and two cushion members
Data Source
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AI summary
A battery module includes a cell assembly, a collection assembly, a first heat insulating member, and a heat insulation cushion assembly. The cell assembly includes a plurality of cells arranged along a length direction of the battery module. The collection assembly is located on a side of the cell assembly along a height direction of the battery module, and is connected to the cell assembly. The first heat insulating member is located on a side of the collection assembly away from the cell assembly along the height direction of the battery module, and is connected to the collection assembly. The heat insulation cushion assembly is located between two adjacent cells, and includes a second heat insulating member and two cushion members. Each cushion member has one side connected to the second heat insulating member and the other side connected to the corresponding cell.