Battery Module Assembly with Solid Heat Barriers for Runaway Delay
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Solution Overview
Problem
Existing battery modules face challenges in preventing thermal runaway and heat propagation, which can lead to safety issues and reduced durability.
Innovation Solution
A battery module design that includes a cell assembly with multiple battery cells, a bus bar assembly, a plate portion, and at least one solid heat blocking member disposed to face the sealing portion and the bus bar assembly, effectively delaying thermal runaway and heat propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If battery cells are assembled closely to increase energy density, then productivity and space utilization are improved, but thermal runaway and heat propagation risks increase
Solution Approach 1:
The patent introduces a heat blocking member as an intermediary substance positioned between adjacent battery cells. This member acts as a thermal barrier that interrupts heat transfer pathways, preventing thermal runaway propagation while allowing the battery cells to maintain close spacing for high energy density. The heat blocking member is specifically placed in the separation space formed by sealing portions and electrode leads of neighboring cells.
2Reliability
If heat blocking members are added to prevent thermal runaway, then safety is improved, but device complexity and assembly difficulty increase
Solution Approach 1:
The heat blocking member is pre-formed with a configuration that matches the separation space geometry before assembly. The member includes inclined areas that facilitate easy insertion into the separation space formed by adjacent battery cells. This preliminary preparation reduces assembly complexity by eliminating the need for complex in-situ forming or adjustment procedures during battery module assembly.
Solution Approach 2:
The heat blocking member's thickness is designed with intermediate fit or loose fit tolerance relative to the separation space dimensions. This parameter optimization allows the member to be easily inserted while maintaining effective heat blocking performance, balancing safety requirements with assembly ease without requiring precision machining or complex fixation mechanisms.
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 proposed solution effectively prevents thermal runaway and heat propagation, improving the safety and durability of the battery module while also enhancing assembly convenience and efficiency.
Implementation Method 1
at least one heat blocking member disposed to face the sealing portion and the bus bar assembly. The heat blocking member is solid... effectively delaying thermal runaway and heat propagation
Data Source
AI summary
A battery module includes a cell assembly including a plurality of battery cells including a case containing an electrode assembly, a sealing portion formed by sealing the case, and an electrode lead exposed to an outside of the case, a bus bar assembly electrically connected to the electrode lead, a plate portion covering the cell assembly and the bus bar assembly, and at least one heat blocking member disposed to face the sealing portion and the bus bar assembly. The heat blocking member is solid.