Battery Module Heat Transfer Suppression Member
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Solution Overview
Problem
Battery modules experience performance degradation due to excessive heat transfer between stacked batteries, leading to thermal runaway and reduced efficiency.
Innovation Solution
Incorporating a heat transfer suppression member, such as a sheet-shaped silica xerogel with a laminate film, between batteries and separators, which reduces heat conductivity and maintains insulation even when the separator melts, thereby preventing heat transfer and thermal runaway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separator is disposed between adjacent two batteries to insulate them, then electrical insulation is achieved, but heat transfer suppression is insufficient leading to thermal runaway
Solution Approach 1:
A heat transfer suppression member is introduced as an intermediary component between the battery and the separator. This member specifically targets heat transfer suppression while allowing the separator to maintain its electrical insulation function, thereby resolving the contradiction between achieving electrical insulation and suppressing heat transfer.
Solution Approach 2:
The insulation system is segmented into two distinct functional components: the separator handles electrical insulation, while the heat transfer suppression member handles thermal isolation. This segmentation allows each component to optimize its specific function without compromising the other.
2Duration of action of stationary object
If the separator melts due to excessive heat, then insulation function is lost, but no protective measure remains to prevent thermal runaway
Solution Approach 1:
The heat transfer suppression member serves as a pre-positioned protective barrier that cushions against heat transfer before thermal runaway can occur. It provides an additional layer of protection that activates before the separator melts, extending the time window for safety intervention.
Solution Approach 2:
The heat transfer suppression member is designed with specific thermal properties (low thermal conductivity) that differ from the separator's properties. This parameter differentiation ensures that the heat suppression member remains effective at temperatures where the separator may fail, thereby extending the overall insulation period.
3Object-affected harmful factors
If additional heat transfer suppression components are added between batteries and separators, then heat transfer is suppressed, but device complexity increases
Solution Approach 1:
The heat transfer suppression member is strategically positioned to serve multiple purposes: it suppresses heat transfer, maintains structural organization, and works synergistically with the separator. This merging of functions reduces the need for additional separate components, thereby limiting the increase in device complexity.
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 suppresses heat transfer and thermal runaway, maintaining battery module performance and extending the insulation period, while also reducing the module's size and component count.
Implementation Method 1
a heat transfer suppression member that is disposed between a battery and a separator adjacent to the battery
Data Source
AI summary
The battery module includes a plurality of batteries that are stacked and a heat transfer suppression member disposed between adjacent two batteries.