Battery Module Heat Conduction Layer for Cell Temperature Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium secondary battery modules experience significant temperature deviations during quick charging, leading to reduced battery cell lifespan due to inadequate cooling strategies.
Innovation Solution
A battery module design incorporating a heat conduction member with a porous insulating layer and conductive layer, where the heat conduction member is composed of a copolymer with hydrogen-bondable polymer segments and a conductive material, such as metals or carbon-based materials, to efficiently transfer heat away from the battery cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If only a lower portion of a battery cell is cooled to increase energy density, then energy density is improved, but temperature deviation in the battery cell increases
Solution Approach 1:
The cooling system is segmented into multiple independent cooling channels positioned at different locations (upper, middle, and lower portions) of the battery cell. This allows separate temperature control in different regions, enabling effective cooling throughout the entire cell while maintaining high energy density through targeted rather than uniform cooling.
Solution Approach 2:
Different cooling strategies are applied to different portions of the battery cell based on their specific thermal characteristics. The upper, middle, and lower portions each have dedicated cooling channels that can be independently controlled, providing localized cooling where needed most while preserving overall energy density.
2Temperature
If a heat conduction member with porous insulating layer and conductive layer is used, then temperature deviation is reduced, but device complexity increases
Solution Approach 1:
The heat conduction member is constructed as a composite structure combining a porous insulating layer with a conductive layer. The porous insulating layer provides thermal insulation and structural support, while the conductive layer (containing metal particles or carbon materials) provides efficient heat conduction pathways. This composite design reduces temperature deviation without requiring multiple separate components, thus limiting the increase in device complexity.
Solution Approach 2:
The insulating and heat-conducting functions are merged into a single integrated heat conduction member rather than using separate insulation and cooling components. This combination reduces the number of parts and assembly steps while achieving both thermal management goals simultaneously.
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 reduces temperature deviations in battery cells, enhancing their lifespan by rapid heat dissipation and maintaining structural integrity through high thermal conductivity and elasticity.
Implementation Method 1
a heat conduction member disposed on one surface of the battery cell stack. The heat conduction member includes a porous insulating layer and a conductive layer disposed on a surface of the porous insulating layer
Implementation Method 2
The porous insulating layer may be formed of a copolymer including a first polymer segment being a hydrogen-bondable polymer segment and a second polymer segment including a polyol structure
Data Source
AI summary
A battery module includes a battery cell stack, on which plurality of battery cells are stacked, and a heat conduction member disposed on one surface of the battery cell stack. The heat conduction member includes a porous insulating layer and a conductive layer disposed on a surface of the porous insulating layer.