High Thermal Conductivity Cushion Pad for Battery Cell Expansion
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Solution Overview
Problem
Conventional cell assemblies face inefficiencies in space utilization due to separate components for heat dissipation and cushioning, which hinder effective heat transfer and absorption of volumetric expansion in lithium secondary batteries.
Innovation Solution
A single cushion pad with high thermal conductivity (1.5 W/mK or higher) is interposed between cells, providing both cushioning and efficient heat transfer functions, formed from materials like polydimethylsiloxane with specific properties for fire retardancy and insulation, and designed to maintain optimal surface contact and thickness ratios for effective heat circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If separate components for heat dissipation and cushioning are installed, then heat dissipation function is improved, but space efficiency deteriorates
Solution Approach 1:
The patent combines the heat dissipation function and cushioning function into a single integrated component. The cushion pad is designed with high thermal conductivity material that allows it to perform both mechanical cushioning and thermal management functions simultaneously, eliminating the need for separate heat dissipation components and thereby improving space efficiency.
Solution Approach 2:
The cushion pad is designed as a multi-functional component that simultaneously provides cushioning support and heat dissipation. By selecting materials with appropriate thermal conductivity and mechanical properties, the single component serves multiple purposes: absorbing volumetric expansion forces while also conducting heat away from the battery cells.
2Force
If conventional cushion pad is used, then cushioning function is provided, but heat circulation deteriorates
Solution Approach 1:
The patent changes the thermal parameter of the cushion pad by selecting materials with high thermal conductivity (≥1.5 W/mK). This parameter change transforms the cushion pad from a thermal insulator to a thermal conductor, enabling it to circulate and dissipate heat while maintaining its cushioning mechanical properties.
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 enhances space efficiency by enabling effective heat dissipation and absorption of volumetric expansion, ensuring rapid heat transfer and impact reduction while maintaining structural stability and safety.
Implementation Method 1
the cushion pad has a thermal conductivity of 1.5 W/mK or higher
Implementation Method 2
configured to absorb volumetric expansion of the cells
Data Source
AI summary
The present disclosure discloses a cell assembly including: a plurality of cells arranged at predetermined intervals; and a cushion pad disposed between the cells to be in surface contact with the cells and configured to absorb volumetric expansion of the cells, wherein the cushion pad has a thermal conductivity of 1.5 W/mK or higher.