Battery Case Sealing Structure With Gas-Permeable Resin Vent
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Solution Overview
Problem
Existing electrical energy storage devices using alloy valve films for gas permeation are costly and require complex attachment processes, necessitating a more cost-effective and workable solution.
Innovation Solution
A structure featuring a metal case with a penetration hole sealed by a resin-based sealing member, integrated with a resin gas permeation film thermally fused to the case, eliminating the need for alloy valve films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an alloy valve film is used for gas permeation, then gas permeability is achieved, but material cost increases and attachment complexity increases
Solution Approach 1:
The sealing member integrates multiple functions into a single component: the resin base part provides sealing for the penetration hole while the gas permeation film provides selective gas permeability. This merging eliminates the need for separate alloy valve film attachment, reducing complexity while maintaining gas permeability functionality.
Solution Approach 2:
The patent replaces expensive alloy valve films with a more economical resin-based sealing member combined with a gas permeation film. This substitution reduces material cost while achieving the same gas permeability function through a simpler, more cost-effective material combination.
2Reliability
If an alloy valve film is used for gas permeation, then gas permeability is achieved, but material cost increases
Solution Approach 1:
The patent substitutes expensive alloy valve films with a resin base part and gas permeation film combination. This replacement uses more economical materials to achieve the same gas permeability function, directly reducing material cost while maintaining the required reliability.
Solution Approach 2:
The invention uses a composite structure combining resin base part material with gas permeation film material. This composite approach replaces the single-material alloy valve film with a multi-material system that achieves comparable gas permeability at lower cost through the synergistic properties of the combined materials.
3Ease of manufacture
If a resin base part is integrated with the case and gas permeation film is thermally fused, then workability improves, but manufacturing process complexity increases
Solution Approach 1:
The resin base part is integrated with the case through thermal fusion, merging the sealing member with the case structure. This integration simplifies assembly by reducing the number of separate components that need to be attached, improving workability despite the thermal fusion process requirement.
Solution Approach 2:
The patent replaces mechanical attachment methods (such as screws, clips, or adhesive bonding) with thermal fusion. This substitution eliminates the need for separate attachment hardware and simplifies the joining process, improving ease of manufacture through a more direct fusion 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
Reduces material costs, improves workability, and enhances the ease of assembly while maintaining gas permeability and sealing integrity.
Implementation Method 1
a gas permeation film that is made of resin and is thermally fused to the base part outside the case so as to cover the penetration hole
Implementation Method 2
a gas permeation film that is made of resin and is thermally fused to the base part outside the case
Data Source
Figure 1~2
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Figure 5
AI summary
An electrical energy storage device (100) to be disclosed herein includes a case (10) that includes a penetration hole (15), and a sealing member (16) that seals the penetration hole (15). The sealing member (16) includes a base part (16b) that is integrated with the case (10) so as to continuously cover a peripheral part of the penetration hole (15) at an inner wall of the penetration hole (15) and an outer surface (14u) of the case (10), and a gas permeation film (16m) that is thermally fused to the base part (16b) outside the case (10) so as to cover the penetration hole (15).