Battery Pack Sealing Layout for Gas and Water Protection
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Solution Overview
Problem
Existing battery packs face challenges in accurately positioning sealing members to improve the sealing of storage spaces, which can be compromised by high-temperature gas or high-pressure water exposure.
Innovation Solution
The battery pack design incorporates a partition wall elevated above the battery module and a cover portion below the sealing member, along with engagement structures and fasteners to secure the sealing member, ensuring accurate positioning and enhanced sealing against gas and water ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing member is used to surround the storage space, then sealing of the storage space is improved, but positioning accuracy of the sealing member deteriorates
Solution Approach 1:
The patent introduces a positioning protrusion on the sealing member that engages with a positioning groove on the battery cover as an intermediary mechanism. This mediator structure guides and constrains the sealing member during assembly, ensuring accurate positioning without requiring high-precision manufacturing of the sealing member itself, thus resolving the contradiction between sealing reliability and positioning accuracy.
Solution Approach 2:
The positioning groove is pre-formed on the battery cover at the correct location and orientation. This preliminary preparation of the receiving structure allows the sealing member to be automatically positioned correctly during assembly, eliminating the need for complex positioning operations and ensuring manufacturing precision while maintaining sealing reliability.
2Reliability
If the sealing member is pressed in a predetermined direction, then sealing of the storage space is improved, but the sealing member is vulnerable to damage from high-temperature gas or high-pressure water
Solution Approach 1:
The patent divides the protective function into two separate components: the compression resilient member handles the sealing function by pressing the sealing member in the predetermined direction, while the positioning protrusion and groove structure handles the protective function by shielding the sealing member from high-temperature gas and high-pressure water. This segmentation allows each component to optimize its specific function without compromising the other.
Solution Approach 2:
The compression resilient member is positioned to press the sealing member against the battery cover beforehand, creating a protective seal that prevents high-temperature gas and high-pressure water from reaching and damaging the sealing member. This prior cushioning action protects the sealing member from harmful factors while maintaining the sealing function.
Data Source
AI summary
A battery pack (10A) includes a storage body (200) provided with a storage space (250) surrounded by a sealing member (230), a battery module (100) stored in the storage space (250), and a partition wall (214b) located between the battery module (100) and the sealing member (230). At least a portion of the partition wall (214b) is located at a higher elevation than an upper surface of the battery module (100).