Battery Electrode Tab Coating for Heat Dissipation and Insulation
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Solution Overview
Problem
Rechargeable lithium batteries face issues with heat generation and ignition due to short circuits, rapid charging, and high output operations, which existing ceramic coatings are unable to effectively suppress.
Innovation Solution
The electrode for a rechargeable lithium battery includes a current collector with a substrate and substrate tab, an electrode active material layer, and a heat dissipating coating layer containing a heat dissipating material that provides both electrical insulation and heat dissipation properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the substrate tab is coated with ceramics to electrically insulate it, then electrical insulation is improved, but heat dissipating properties deteriorate
Solution Approach 1:
The patent applies composite materials by combining ceramic particles (for electrical insulation) with metal particles (for heat dissipation) to create a coating layer that simultaneously provides both electrical insulation and heat dissipation properties, resolving the contradiction between these two opposing requirements
Solution Approach 2:
The patent changes the material parameters of the coating layer by adjusting the types, sizes, and ratios of ceramic and metal particles, as well as the thickness of the coating layer, to optimize the balance between electrical insulation and heat dissipation performance
2Productivity
If rapid charging or high output operation is performed, then charging speed or power output is improved, but heat generation increases causing safety issues
Solution Approach 1:
The coating layer acts as an intermediary between the substrate tab and the environment, providing thermal management functionality that dissipates heat generated during rapid charging or high output operation, thereby enabling high productivity while controlling harmful heat effects
Solution Approach 2:
The patent replaces passive ceramic coating with an active thermal management system that uses metal particles to conduct heat away from the substrate tab, substituting a thermally inactive material with one that actively manages heat transfer
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
This configuration effectively reduces heat generation and prevents ignition in various situations, thereby enhancing the safety and reliability of the lithium battery.
Implementation Method 1
a heat dissipating coating layer on the substrate tab and including a heat dissipating material
Data Source
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AI summary
An electrode for a rechargeable lithium battery, and an electrode assembly and a rechargeable lithium battery including the same are provided. The electrode for a rechargeable lithium battery includes a current collector including a substrate and a substrate tab extending from one end of the substrate; an electrode active material layer on the substrate; and a heat dissipating coating layer on the substrate tab.