Aerogel Insulation Sheet for Blocking Heat Between Battery Cells
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Solution Overview
Problem
Existing rechargeable lithium batteries face challenges in effectively blocking heat propagation and transfer between adjacent cells, requiring improved durability, dust resistance, and flexibility in their insulation materials.
Innovation Solution
A heat insulation sheet for rechargeable lithium batteries comprising a first base layer and an aerogel-containing layer, where the aerogel-containing layer includes a fibrous support, aerogel, and binder, with specific weight percentages for each component, providing enhanced durability, heat insulation, and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional insulation materials are used in rechargeable lithium battery modules, then heat insulation is provided, but durability and dust resistance are insufficient
Solution Approach 1:
The heat insulation sheet uses a composite structure consisting of a base layer and an aerogel-containing layer. The aerogel-containing layer further comprises fibrous support, aerogel particles, and binder, creating a multi-material composite that combines the thermal insulation properties of aerogel with the structural integrity and dust resistance of the fibrous support and base layer.
Solution Approach 2:
The patent utilizes aerogel, a highly porous material with exceptional thermal insulation properties, as the core insulating component. The porous structure of aerogel provides low thermal conductivity while maintaining lightweight characteristics, effectively blocking heat propagation between battery cells.
2Temperature
If aerogel-containing layer is added to improve heat insulation, then thermal insulation performance is enhanced, but manufacturing complexity increases
Solution Approach 1:
The heat insulation sheet is divided into distinct functional layers: a base layer providing structural support and an aerogel-containing layer providing thermal insulation. The aerogel-containing layer itself is segmented into fibrous support, aerogel particles, and binder components. This segmentation allows each component to be optimized independently while simplifying the overall manufacturing process through modular assembly.
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 insulation sheet effectively reduces heat transfer, enhances durability, and provides dust resistance, ensuring improved performance and reliability of lithium battery modules.
Implementation Method 1
it may be advantageous to block heat propagation and/or heat transfer between adjacent cells
Data Source
AI summary
The present disclosure relates to a heat insulation sheet for a rechargeable lithium battery, and a rechargeable lithium battery module including the heat insulation sheet. The heat insulation sheet includes a first base layer and an aerogel-containing layer stacked on the first base layer. The first base layer is a fiber mat, the aerogel-containing layer includes a fibrous support, an aerogel, and a binder. In the aerogel-containing layer, the fibrous support is included in an amount ranging from about 5 wt % to about 70 wt %, the aerogel is included in an amount ranging from about 10 wt % to about 90 wt %, and the binder is included in an amount ranging from about 0.5 wt % to about 20 wt %.