Battery Module Fire Barrier That Preserves Cooling Airflow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional battery modules suffer from low cooling efficiency and secondary damage due to fire or hot air transfer between adjacent units during thermal runaway, necessitating a structure that maintains cooling efficiency while preventing fire transition.
Innovation Solution
A battery module with a blocking member that expands at a predetermined temperature to isolate adjacent units, using materials like shape memory alloys or coil springs to block fire or hot air transfer without requiring sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a partition wall is formed along all side surfaces of the battery cell even at normal times, then fire transition prevention is improved, but cooling efficiency deteriorates
Solution Approach 1:
The partition wall is designed to be movable rather than fixed, allowing it to change position dynamically. During normal operation, the partition wall retracts to allow air flow for cooling. When thermal runaway occurs and temperature increases, the partition wall automatically moves to block fire transition between adjacent battery cells, thus resolving the contradiction between cooling efficiency and fire prevention
Solution Approach 2:
The partition wall's position parameter is changed based on temperature conditions. At normal temperatures, the partition wall is positioned to allow air circulation. When temperature reaches a critical threshold indicating thermal runaway, the partition wall moves to a blocking position, changing the system's configuration parameter in response to environmental conditions
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
The solution effectively prevents secondary damage by blocking fire or hot air transfer while maintaining cooling efficiency, with a simple structure that does not rely on sensors.
Implementation Method 1
the length of the at least one blocking member increasing when the at least one blocking member is heated to a predetermined temperature or higher
Implementation Method 2
at least one of the pair of auxiliary walls may be made of a material that is melted or deformed when heated to a predetermined temperature or higher
Data Source
AI summary
A battery module has a fire transition prevention structure and a battery pack includes the battery module. The battery module has a fire transition prevention structure, the battery module including a module case, two or more unit modules received in an inner space of the module case in a state of being spaced apart from each other by a predetermined distance, and a blocking member located between the unit modules, the length of the blocking member being changed when the blocking member is heated to a predetermined temperature or higher.