Battery Housing Insulating Coating to Prevent Surface Breakdown
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Solution Overview
Problem
Existing battery insulation methods using insulating blue films are prone to breakdown, leading to poor safety and reliability due to issues such as poor interlayer interface bonding, granular surface texture, and potential exposure of local substrates.
Innovation Solution
A battery housing with a single-layer insulating coating having a unit average size of 1 mm² to 10 mm² is applied, addressing issues of poor safety and insulation performance by preventing breakdown and ensuring consistent coating coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulating blue films are cladded on battery surfaces to achieve insulation, then insulation function is provided, but the films are prone to breakdown resulting in poor safety
Solution Approach 1:
The patent changes the key parameter of the insulating coating from conventional thin films to a thick coating with thickness of 5-20 μm, and controls the unit average size to be 0.5-5 μm. This parameter change makes the coating resistant to breakdown while maintaining insulation function, directly resolving the contradiction between insulation reliability and breakdown risk.
Solution Approach 2:
The patent applies local quality control by specifying that at least a part of the battery housing surface has a single-layer insulating coating with controlled unit average size and thickness. This localized optimization ensures critical areas have enhanced insulation properties without requiring complete coverage everywhere, balancing reliability with manufacturing feasibility.
2Reliability
If multi-layer insulating coating is applied to improve insulation performance, then insulation coverage is enhanced, but interlayer interface bonding becomes poor
Solution Approach 1:
The patent extracts the problematic multi-layer structure and replaces it with a single-layer insulating coating that has sufficient thickness (5-20 μm). By removing the intermediate layers and their interfaces, the patent eliminates the interlayer bonding issue entirely while maintaining adequate insulation coverage through the increased single-layer thickness.
3Manufacturing precision
If insulating coating with fine granular texture is applied to improve surface coverage, then coverage uniformity is improved, but granular surface texture increases
Solution Approach 1:
The patent changes the particle size parameter of the insulating coating to a specific range (unit average size 0.5-5 μm) and controls the thickness (5-20 μm). This parameter optimization achieves uniform coverage while controlling the granular texture to acceptable levels, balancing coverage precision with surface quality.
Data Source
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AI summary
The present disclosure relates to the technical field of batteries, and more particularly relates to a battery, a battery device and electric equipment. The battery includes a battery housing (10), wherein a surface of the battery housing (10) is provided with an insulating coating (20), and at least a part of a surface area of the battery housing (10) has a single-layer insulating coating, with a unit average size in the single-layer insulating coating being 1 mm2 to 10 mm2.