Plated Sealing System for Vehicle Battery Moisture Protection
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Solution Overview
Problem
Electrified vehicle assemblies face challenges in preventing moisture ingress, which can damage components and affect performance, particularly in battery assemblies where moisture can lead to corrosion and reduced efficiency.
Innovation Solution
A sealing system comprising an exterior and interior plate with seals, such as O-ring and polymer infiltration and pyrolysis (PIP) seals, positioned between the plates to restrict moisture ingress through the walls and tubing, ensuring secure attachment with fasteners and recessed surfaces for effective sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing system with multiple seals and plates is used, then moisture ingress is restricted, but device complexity increases
Solution Approach 1:
The sealing system is divided into multiple functional components including an exterior plate, interior plate, and separate seal elements (O-ring seal and PIP seal). Each component performs a specific sealing function at different locations, creating a segmented defense against moisture ingress while maintaining manageable complexity through modular design
Solution Approach 2:
Different seal types are applied at different locations based on specific requirements: O-ring seals are used where flexibility and ease of installation are needed, while PIP seals are applied where rigid chemical resistance and structural integration are required. This localized optimization achieves comprehensive moisture protection without uniformly increasing complexity throughout the entire system
2Reliability
If seals are positioned about tubing to restrict moisture ingress, then reliability improves, but manufacturing precision requirements increase
Solution Approach 1:
The sealing surfaces on the plates are pre-formed with precise geometries and tolerances during manufacturing. This preliminary precision in the plate fabrication allows the seals to be installed with standard tolerances, as the critical precision requirements are built into the rigid plate structures rather than requiring precise seal positioning during assembly
Solution Approach 2:
The rigid plate structures serve as intermediaries that provide stable, precisely-formed sealing surfaces. These plates mediate between the manufacturing process and the seal installation, allowing seals to be positioned relative to the plates rather than requiring direct precision between seals and tubing, thereby reducing the overall manufacturing precision burden
Data Source
AI summary
A sealing system includes an exterior plate, an interior plate, a first seal received against the exterior plate and configured to restrict moisture ingress through the exterior plate, and a second seal received against the interior plate and configured to restrict moisture ingress through the interior plate. The sealing system may be used to seal around tubing that extends through a vehicle battery enclosure.