Battery Pack Gasket Compression Limiter for Stable Sealing
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Solution Overview
Problem
Conventional battery packs face issues with gasket deviation due to pressure or friction during assembly, leading to compromised water tightness and safety, and the process of inserting metal bushings increases manufacturing time and costs.
Innovation Solution
The battery pack design incorporates gasket compression limiters with diameters larger than the fastening members, ensuring the gasket remains in place and maintaining compression, thereby enhancing water tightness and safety while reducing manufacturing time and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gaskets are made of elastic materials to achieve sealing capability, then sealing performance is improved, but gasket deviation occurs due to pressure or friction during assembly
Solution Approach 1:
A metal bushing is introduced as an intermediary component between the fastening member and the gasket. The bushing has a diameter larger than the fastening member, allowing the gasket to be compressed and secured without direct contact with the fastening member, thereby preventing gasket deviation while maintaining sealing performance
Solution Approach 2:
The diameter of the metal bushing is designed to be larger than the fastening member, creating a dimensional parameter difference that allows the gasket to be compressed between the bushing and the fastening member. This parameter change enables the gasket to maintain its position without deviation
2Manufacturing precision
If metal bushings are inserted into fastening holes to prevent gasket deviation, then gasket position stability is improved, but manufacturing time and costs increase
Solution Approach 1:
The metal bushing is integrated into the gasket assembly such that the bushing, gasket, and fastening member work together as a unified fastening system. This merging of functions allows the bushing to serve both as a positioning element and a compression element, simplifying the overall assembly process
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 solution effectively prevents gasket deviation and maintains compression, improving the overall safety and water tightness of the battery pack while simplifying the manufacturing process.
Implementation Method 1
due to a pressure or friction applied when the tray assembly and a cover member are coupled, the phenomenon of the gasket to deviate from the coupling portion may be prevented
Data Source
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AI summary
The present invention provides a battery pack including: a battery module assembly including a plurality of battery cells; a tray assembly having an upper surface on which the battery module assembly is mounted; a cover member having an outer periphery coupled to face an outer periphery of the tray assembly while the battery module assembly is accommodated therein; and a sealing gasket interposed between the mutually facing outer peripheries of the tray assembly and the cover member, wherein mutually communicating fastening holes are respectively formed in the outer peripheries of the tray assembly, the outer peripheries of the cover member, and the gasket such that first fastening members are inserted thereinto; one or more second fastening members respectively coupled to the first fastening members are positioned under the fastening holes formed on the tray assembly; second fastening members include gasket compression limiters in which one ends thereof pass through the fastening holes of the tray assembly and extend to protrude toward an upper surface of the tray assembly; and the gasket compression limiters are inserted into the fastening holes of the gasket, and the diameters of the outer circumferential surfaces of the gasket compression limiters are relatively greater than the diameters of the outer circumferential surfaces of the first fastening members.