Battery Module Heat Insulating Members for Thermal Runaway Prevention
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Solution Overview
Problem
High-power battery modules using non-aqueous electrolytes face issues with heat management, leading to potential thermal runaway, short circuits, and safety risks due to heat transfer between battery cells and foreign matter-induced insulation breakdown.
Innovation Solution
Incorporating heat insulating members with specific thickness and thermal conductivity between battery cells, made from fiber sheets like vulcanized cotton or pulp fiber and cellulose, to control heat transfer and prevent direct contact, while maintaining a compact module design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If heat insulating members are interposed between battery cells, then heat transfer between battery cells is reduced, but device complexity increases
Solution Approach 1:
Heat insulating members are introduced as intermediary elements positioned between adjacent battery cells. These members act as thermal barriers that prevent direct heat transfer between cells, thereby reducing the harmful thermal coupling effect while maintaining the compact battery module structure.
Solution Approach 2:
The heat insulating members are constructed using composite material structures, specifically combining resin materials with fibrous materials (such as glass fibers or ceramic fibers). This composite approach provides effective thermal insulation with optimized mechanical properties and thermal resistance, addressing both the insulation requirement and structural integrity.
2Temperature
If heat insulating members with thickness of 0.5 mm to 2 mm are used, then thermal insulation performance is improved, but volume of battery module increases
Solution Approach 1:
The thickness of heat insulating members is optimized within a specific range of 0.5 mm to 2 mm. This parameter optimization balances thermal insulation performance with space constraints, ensuring sufficient thermal barrier capability while minimizing the volume increase of the battery module. The specific thickness range is determined based on thermal conductivity requirements and available space between battery cells.
Solution Approach 2:
Heat insulating members are selectively positioned only at critical interfaces between adjacent battery cells where thermal management is most needed. This localized approach provides effective thermal insulation at key heat transfer paths without uniformly increasing the volume of the entire battery module, thereby optimizing the balance between thermal performance and compactness.
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
Effectively reduces heat transfer between battery cells, enhances safety by preventing thermal runaway and insulation breakdown, and maintains module compactness without increasing manufacturing costs.
Implementation Method 1
heat insulating members interposed between the plurality of battery cells so as to control heat generated in the battery cells
Data Source
AI summary
A battery module including a plurality of battery cells arranged in one direction; heat insulating members interposed between the plurality of battery cells so as to control heat generated in the battery cells; and a housing fixing the battery cells and the heat insulating members.