Battery Module Cooling Layout for Uniform Pouch Cell Temperature
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Solution Overview
Problem
Existing battery modules experience temperature deviation among pouch-shaped battery cells due to varying heat loss based on position, leading to uneven degradation and performance issues.
Innovation Solution
A battery module design with a heat transfer material applied to the middle part of the cooling member, combined with a cooling plate between middle battery cells, to minimize temperature deviation by enhancing heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If battery cells are arranged in tight contact with each other in a module case, then space utilization and structural stability are improved, but temperature deviation between battery cells increases due to position-dependent heat loss
Solution Approach 1:
The patent applies different thermal conductivity materials at different locations within the battery module. Specifically, a first heat dissipation material with higher thermal conductivity is placed between adjacent battery cells to enhance heat transfer in regions with higher heat generation, while a second heat dissipation material with lower thermal conductivity is used in other regions. This localized differentiation of material properties enables uniform temperature distribution across all battery cells while maintaining tight contact arrangement.
2Loss of energy
If heat dissipation resin is added between battery cells and module case, then heat dissipation capability is improved, but temperature deviation between battery cells persists due to positional differences
Solution Approach 1:
The patent introduces position-dependent heat dissipation barriers within the heat dissipation resin layer. Specifically, heat dissipation barriers are strategically placed at middle positions of battery cells where heat accumulation is more severe, while allowing greater heat dissipation at edge positions. This localized modification of heat dissipation characteristics compensates for positional differences and achieves uniform temperature distribution across all battery cells.
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
Reduces temperature deviation between battery cells to less than 3°C, preventing degradation and extending the lifespan of the battery module.
Implementation Method 1
a heat transfer material added to a middle part of an outer surface of the cooling member that faces the first surface of the module case
Implementation Method 2
a cooling member coupled outside the first surface of the module case, the cooling member being configured to cool the battery cell stack
Data Source
AI summary
A battery module includes a module case having a battery cell stack constituted by a plurality of stacked battery cells received therein, a heat dissipation resin added between the battery cell stack and a first surface of the module case, a cooling member coupled outside the first surface of the module case, the cooling member being configured to cool the battery cell stack, and a heat transfer material added to a middle part of an outer surface of the cooling member that faces the first surface of the module case. The heat transfer material is disposed at a part of the battery cell stack that has a relatively high temperature, whereby temperature deviation between the battery cells is reduced.