Battery Pack Sealing with Sealant and Mesh Drainage
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Solution Overview
Problem
Conventional battery packs lack an effective waterproof and dustproof structure with sufficient airtightness and efficiency, particularly in home energy storage devices where safety and environmental protection are critical.
Innovation Solution
A battery pack design featuring a sealed case base, body, and cover with a sealant member, combined with a mesh unit for drainage and dust protection, including a first and second mesh net with alternating structures and a dust-protecting filter to prevent foreign matter and ensure efficient water discharge and flame containment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealed structure with sealant member is used to prevent moisture and dust penetration, then waterproof and dustproof performance is improved, but device complexity increases
Solution Approach 1:
The patent uses a sealant member that forms a flexible sealing layer between the case body and case cover. This thin film approach provides effective waterproof and dustproof barriers without requiring complex rigid sealing structures, thus improving protection performance while maintaining structural simplicity
Solution Approach 2:
The patent integrates the sealant member application process with the existing case assembly structure. The sealant is applied along the rim of the case body and bonds with the case cover, merging the sealing function with the structural assembly rather than adding separate complex sealing components
2Productivity
If drainage holes are provided for water discharge, then water drainage efficiency is improved, but waterproof performance deteriorates
Solution Approach 1:
The patent applies different properties to different parts of the case structure. The case body has sealed surfaces and rims where sealant is applied for waterproofing, while specific localized areas (drainage holes) are provided with different properties to enable water discharge. This local differentiation allows simultaneous achievement of waterproof performance and drainage efficiency
Solution Approach 2:
The sealant member acts as an intermediary element that selectively manages fluid passage. It provides waterproof sealing in most areas while allowing controlled water discharge through designated drainage holes, mediating between the conflicting requirements of waterproofing and drainage
3Reliability
If mesh units and filters are added for dust protection, then dustproof performance is improved, but device complexity increases
Solution Approach 1:
The patent employs mesh units with porous structures that allow airflow while blocking dust particles. These porous materials provide effective dustproof performance through their inherent physical structure rather than requiring complex multi-layer filtration systems, thus maintaining structural simplicity
Solution Approach 2:
The mesh units serve multiple functions simultaneously: they provide dustproof barriers, maintain airflow pathways, and work in conjunction with the sealant member to enhance overall protection. This multi-functionality reduces the need for separate dedicated components for each protection function, thereby reducing overall structural complexity
Data Source
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AI summary
Disclosed is a battery pack, which includes at least one battery module and a pack case for packaging the at least one battery module, and the battery pack includes a case base configured to support the at least one battery module, a case body coupled to the case base to accommodate the at least one battery module, and a case cover coupled to the case body to cover the case body, wherein the case base and the case body are sealed to each other and the case body and the case cover are sealed to each other, respectively, by means of a sealant member along a rim thereof.