Battery Pack Terminal Layout With Parylene Liquid Barrier
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Solution Overview
Problem
Conventional battery packs are vulnerable to moisture and liquid infiltration due to the design of cathode and anode terminals extending from different faces, making it difficult to apply effective liquid-resistant protection.
Innovation Solution
A battery pack design with cathode and anode terminals extending from the same face, covered by a conformal Parylene coating on the enclosure's surface except for the terminal face, and additional liquid-resistant tape coatings at vulnerable points, enhancing moisture and liquid resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid-resistant coating is applied to the entire battery pack surface, then liquid resistance is improved, but the terminals cannot extend from the enclosure surface
Solution Approach 1:
The patent applies liquid-resistant coating to specific regions of the battery pack enclosure while deliberately leaving the terminal regions uncovered. This local differentiation allows the coating to provide protection where needed while maintaining terminal accessibility for electrical connections.
Solution Approach 2:
The battery pack surface is segmented into coated regions and uncoated terminal regions. This segmentation strategy allows different functional requirements to be met in different areas - liquid resistance in most areas and electrical connectivity at terminal points.
2Object-affected harmful factors
If the battery pack is fully enclosed for protection, then liquid infiltration is prevented, but terminal access is blocked
Solution Approach 1:
The enclosure structure implements local quality by providing full enclosure and liquid protection for the battery cells while creating localized openings or access points at the terminal regions. This allows the majority of the battery pack to be sealed against liquid infiltration while maintaining necessary electrical access.
3Reliability
If liquid-resistant protection is applied to all surfaces, then battery performance is improved, but manufacturing complexity increases due to selective coating requirements
Solution Approach 1:
The manufacturing process is simplified by applying liquid-resistant coating only to specific regions of the enclosure rather than requiring complex masking and selective coating of entire surfaces. The coating is applied to all surfaces except the terminal faces, which naturally remain uncoated.
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 design significantly increases the battery pack's resistance to moisture and liquid infiltration, ensuring higher performance and protection against environmental exposure.
Implementation Method 1
A Parylene coating may be applied to an entire surface of the enclosure except for at least a portion of a surface of the first face
Data Source
AI summary
Aspects of the present disclosure involve various battery packs. In general, the battery pack includes a plurality of layers and an enclosure enclosing the plurality of layers. A cathode terminal and an anode terminal extend from a first face of the enclosure. The cathode terminal and the anode terminal are connected to the plurality of layers. A Parylene coating may cover an entire surface of the enclosure except for at least a portion of a surface of the first face.