Secondary Battery Module Barriers with Spacers for Heat Dissipation
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Solution Overview
Problem
High power secondary battery modules face challenges in dissipating heat efficiently and minimizing swelling and damage from external impacts and vibrations due to the generation of heat during repeated charging and discharging cycles.
Innovation Solution
A secondary battery module design featuring a first and second barrier with spacers in between, where the barriers are made of aluminum with an oxide layer for thermal conductivity and the spacers are designed with protrusions and inserts for secure fixation, creating cooling channels to dissipate heat and prevent damage from external factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If barriers are located between unit cells to allow air flow for cooling, then heat dissipation is improved, but the structure becomes more complex and vulnerable to external impacts
Solution Approach 1:
The barrier structure is segmented into multiple components: first barrier, second barrier, and spacers positioned between them. This segmentation allows air to flow through the spaced arrangement for heat dissipation while each component can be independently optimized for structural strength and impact resistance.
Solution Approach 2:
The barriers are constructed using composite materials consisting of a metal plate (aluminum) with an oxide layer on its surface. This composite structure provides both thermal conductivity for heat dissipation and mechanical strength for protecting against external impacts and vibrations.
2Temperature
If barriers are made of metal with oxide layer for thermal conductivity, then heat dissipation is improved, but protection against external impacts may be reduced compared to solid metal
Solution Approach 1:
The barrier uses a composite structure of metal plate with oxide layer that maintains thermal conductivity while providing adequate mechanical protection. The multi-component barrier system (first barrier, second barrier, spacers) further distributes impact forces.
Solution Approach 2:
The barrier is divided into multiple segments (first and second barriers with spacers) that can absorb and distribute impact energy, reducing the vulnerability associated with single-structure barriers while maintaining thermal management functionality.
3Temperature
If spacers are added between first and second barriers to maintain constant distance, then cooling efficiency is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The spacer incorporates protrusions that divide the spacing function into discrete, easily manufacturable features. These protrusions can be integrated into the barrier structures using standard molding or machining processes, reducing manufacturing complexity compared to precision-spaced assemblies.
Solution Approach 2:
The spacer acts as an intermediary component between the first and second barriers, maintaining the required constant distance for optimal cooling while simplifying the overall assembly process. The protrusions on the spacer provide straightforward engagement features that reduce manufacturing difficulty.
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 design effectively dissipates internal heat and reduces the likelihood of damage from external impacts and vibrations, enhancing the stability and performance of the battery module.
Implementation Method 1
the barriers are made of aluminum with an oxide layer for thermal conductivity
Data Source
AI summary
A secondary battery module includes a plurality of unit cells; a first barrier located between adjacent ones of the unit cells; a second barrier located between adjacent ones of the unit cells and spaced from the first barrier; and spacers located between the first barrier and the second barrier.