Heat Dissipation Sheet Composition for Thermal Conduction and Insulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing thermally conductive sheets lack both high thermal conductivity and effective insulation, particularly for high-capacity batteries in electric vehicles, where efficient heat radiation is crucial to prevent overheating and electrical shorts.
Innovation Solution
A composition comprising a thermally conductive filler, plasticizer, acrylic acid, and alkyl (meth)acrylate monomer, with specific ratios and types, is used to create a heat radiation sheet with excellent thermal conductivity and insulation properties, including a surface resistance of 2*10^13 to 6*10^13 Ω/□, facilitating safe and efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a general thermally conductive acrylic sheet is used, then thermal conductivity is improved, but insulation properties deteriorate
Solution Approach 1:
The patent uses a composite material system consisting of acrylic acid, alkyl (meth)acrylate monomer, and thermally conductive filler. This composite approach allows simultaneous achievement of high thermal conductivity (through filler incorporation) and excellent insulation properties (through the acrylic-based polymer matrix with specific compositional ratios), resolving the contradiction between thermal conductivity and insulation.
Solution Approach 2:
The patent achieves the balance between thermal conductivity and insulation by precisely controlling compositional parameters: acrylic acid content (0.3-0.5 parts by weight per 100 parts alkyl (meth)acrylate monomer) and plasticizer content (30-80 parts by weight per 100 parts alkyl (meth)acrylate monomer). This parameter optimization enables the material to exhibit both high thermal conductivity and excellent electrical insulation.
2Temperature
If metallic radiator is attached to battery, then heat radiation efficiency is improved, but risk of electrical short circuit increases
Solution Approach 1:
The patent introduces an acrylic-based heat radiation sheet as an intermediary material between the metallic radiator and the battery. This intermediate layer maintains efficient thermal contact while providing electrical insulation, thus preventing short circuits while preserving heat radiation efficiency. The sheet's high thermal conductivity ensures effective heat transfer, and its insulating properties eliminate electrical hazards.
Solution Approach 2:
The heat radiation sheet is a composite material combining thermally conductive fillers within an acrylic polymer matrix, creating a material that simultaneously provides thermal conduction and electrical insulation. This composite structure allows the sheet to function as both a thermal management component and an electrical insulator, resolving the contradiction between heat radiation efficiency and short circuit prevention.
3Temperature
If thermally conductive sheet is used for heat radiation, then thermal conductivity is improved, but flexibility and ease of handling deteriorate
Solution Approach 1:
The patent optimizes the plasticizer content (30-80 parts by weight per 100 parts alkyl (meth)acrylate monomer) to achieve the desired balance between thermal conductivity and flexibility. The plasticizer modifies the polymer matrix properties, enabling the sheet to maintain high thermal conductivity while exhibiting sufficient flexibility for practical application and easy handling.
Solution Approach 2:
The composite formulation incorporating acrylic acid, alkyl (meth)acrylate monomer, plasticizer, and thermally conductive filler creates a material with optimized properties. The specific composition ratios enable the sheet to simultaneously achieve high thermal conductivity, flexibility, and ease of handling, overcoming the limitations of conventional thermally conductive sheets.
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 heat radiation sheet provides superior thermal conductivity and insulation, preventing battery overheating and electrical shocks, while being easy to handle due to its low hardness and roll-formability, ensuring stability and safety in electric vehicle applications.
Implementation Method 1
a thermally conductive filler... excellent thermal conductivity... quickly transfer heat generated in the device to a radiator
Implementation Method 2
the heat radiation member is also required to have electrical insulation in many cases in order to prevent the problems caused by a short circuit to a coolant or a housing... surface resistance of 2*10^13
Data Source
AI summary
The present disclosure provides a composition having excellent thermal conductivity and insulating properties and easy of handling, and a heat radiation sheet manufactured therefrom. The composition according to an embodiment of the present disclosure contains a thermally conductive filler, a plasticizer, acrylic acid, and an alkyl (meth)acrylate monomer.