Battery Plasma Coating for Waterproof and Anti-Corrosion Protection
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Solution Overview
Problem
Conventional batteries suffer from poor waterproof and anti-corrosion performances, leading to potential short circuits and damage due to moisture exposure, with existing sealing methods failing to prevent corrosion and wear.
Innovation Solution
A battery with a multi-layer plasma polymerization coating system, comprising a siloxane-based coating I, an epoxy-based coating II, and a cyclosiloxane-based coating III, applied through plasma polymerization using specific monomers, providing a robust protective layer that is free of fluorine and halogen elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tight waterproof shell is used to seal the battery, then waterproof performance is improved, but the sealing ring experiences wear and aging during use
Solution Approach 1:
The patent applies a plasma polymerization coating film on the battery surface to provide waterproof and anti-corrosion protection. This thin film coating replaces or supplements the traditional sealing ring mechanism, reducing wear and aging on sealing components while maintaining waterproof performance.
Solution Approach 2:
The patent uses composite plasma polymerization coatings formed from multiple monomers (siloxane, acrylic acid, epoxy compound, cyclosiloxane) to create a multi-functional protective layer that provides both waterproofing and corrosion resistance, thereby protecting the sealing structure from degradation.
2Reliability
If conventional sealing methods are used, then initial waterproof performance is achieved, but anti-corrosion performance deteriorates due to excessive moisture on battery surface
Solution Approach 1:
The patent changes the surface properties of the battery by applying plasma polymerization coatings that alter the chemical composition and surface energy of the battery shell. This creates a hydrophobic and corrosion-resistant surface that prevents moisture accumulation and eliminates the harmful effects of excessive moisture.
Solution Approach 2:
The plasma polymerization coating acts as an intermediary protective layer between the battery shell and the external environment (moisture, sweat, corrosive substances). This coating barrier prevents direct contact between harmful substances and the battery shell, thereby preventing corrosion while maintaining waterproof performance.
3Reliability
If a multi-layer plasma polymerization coating is applied, then waterproof and anti-corrosion performance are enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent combines multiple protective functions (waterproofing, corrosion resistance, hydrophobicity) into a single integrated plasma polymerization coating system. By using sequential deposition of different monomer-based coatings, the process achieves multiple protective effects in one manufacturing step, reducing overall system complexity despite the multi-layer structure.
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 system significantly enhances the battery's waterproof and anti-corrosion performance, effectively preventing corrosion and short circuits from moisture and sweat exposure, as demonstrated by extended testing in sweat and sea salt water environments.
Implementation Method 1
The coating I is a plasma polymerization coating formed by contacting at least a part of the surface of the battery with plasmas including a monomer α and a monomer β
Data Source
AI summary
Provided in a particular embodiment of the present invention is a batter with a coating. In the coating, a plasma coating of a siloxane monomer and an ester monomer of acrylic acid and homologues thereof is used as a base layer; a plasma coating of a multifunctional epoxide of an epoxide monomer with a carbon-carbon double bond structure, an epoxide monomer with a carbon-carbon triple bond structure or an epoxide monomer with two or more epoxy structures and an ester monomer of acrylic acid and the homologues thereof is used as an anti-corrosive layer; a plasma coating of a cyclosiloxane monomer is used as a hydrophobic layer; and all the layers are closely combined with each other to form, on the surface of the battery, an excellent protective coating free of halogens such as fluorine.