Electrodeposited Insulating Coating for Heat-Dissipating Thin Films
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Solution Overview
Problem
There is a need for a thermally conductive and electrically insulative coating that applies uniformly to substrates, including at low film-thicknesses, and effectively dissipates heat, as existing insulating coatings struggle with uniform application and heat dissipation in metal electrical components and batteries.
Innovation Solution
An electrodepositable coating composition comprising a cationic or anionic electrodepositable binder, a thermally conductive, electrically insulative filler material, and a fire-retardant pigment, which is applied via electrodeposition to provide a uniform, thermally conductive, and electrically insulative coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dielectric tapes and coatings are applied to provide insulating properties, then electrical insulation is improved, but uniform application becomes difficult and heat dissipation capability deteriorates
Solution Approach 1:
The patent changes the chemical and physical parameters of the coating composition by incorporating specific electrodepositable polymers with controlled molecular weights, functional groups, and ionic characteristics. This enables the coating to be applied uniformly via electrodeposition while maintaining insulating properties and adding thermal conductivity through filler materials.
Solution Approach 2:
The patent creates a composite coating material combining electrodepositable binder polymers with thermally conductive filler materials (such as metal oxides, ceramic particles, or diamond dust) and fire-retardant pigments. This composite structure provides simultaneous electrical insulation, thermal conductivity, fire resistance, and uniform applicability through electrodeposition.
2Reliability
If insulating coatings are applied to protect substrates, then electrical insulation is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The patent incorporates thermally conductive filler materials (metal oxides, ceramic particles, diamond dust) into the electrodepositable coating composition. These fillers create thermal pathways that conduct heat away from the substrate while the polymer matrix maintains electrical insulation, thus simultaneously improving both heat dissipation and electrical insulation.
Solution Approach 2:
The patent designs a multi-functional coating that simultaneously provides electrical insulation, thermal conductivity, fire resistance, and corrosion protection. The electrodepositable binder provides insulation and adhesion, while filler materials provide thermal conductivity and fire resistance, making the coating universally applicable for protecting electrical components from multiple hazards.
3Productivity
If low film thickness is used to maintain component size, then space utilization is improved, but uniform application and insulating properties become difficult to obtain
Solution Approach 1:
The patent optimizes the rheological and electrochemical parameters of the coating composition, including viscosity, molecular weight distribution, and ionic content, to enable uniform electrodeposition at low film thicknesses. The controlled polymer architecture and additive package ensure proper flow and leveling characteristics that achieve uniform coverage even at minimal thicknesses.
Solution Approach 2:
The patent replaces traditional mechanical application methods (brushing, rolling, spraying) with electrodeposition, which uses electrical fields to deposit the coating uniformly. This substitution enables precise control of film thickness and uniformity, achieving consistent insulating properties at low thicknesses that are difficult to obtain with mechanical application.
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 coating ensures uniform application, effective heat dissipation, and enhanced electrical insulation, while also providing fire-retardant properties, addressing the limitations of existing coatings in terms of thickness and thermal management.
Implementation Method 1
Electrodeposition as a coating application method involves deposition of a film-forming composition onto a conductive substrate under the influence of an applied electrical potential
Implementation Method 2
battery components can produce heat during use, and insulating tapes and coatings often have difficulty dissipating such heat by conducting it away from the underlying substrate
Implementation Method 3
substrates, such metal electrical components and batteries, are often protected with a high dielectric strength material to provide insulating properties
Data Source
AI summary
The present invention is directed towards an electrodepositable coating composition comprising an electrodepositable binder; and a thermally conductive, electrically insulative filler, a fire-retardant pigment, or a combination thereof. Also disclosed are methods of making the electrodepositable coating composition, coatings, and coated substrates.