Feedthrough System Sealing for Electrochemical Cells
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Solution Overview
Problem
Existing feedthrough systems for electrochemical cells face challenges in maintaining fluid-tightness and durability, particularly under increased pressure and temperature conditions, which can lead to safety risks such as thermal runaway and explosive inflammation.
Innovation Solution
A feedthrough system comprising a metallic wall component with feedthrough openings and a fastening device that securely connects lines to the component in a fluid-tight manner, using a combination of non-positive and positive connections, and sealing elements formed from polymer or glass materials to enhance mechanical and chemical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional feedthrough systems are used to connect lines to electrochemical cells, then basic connectivity is achieved, but fluid-tightness and mechanical integrity deteriorate under increased pressure and temperature conditions
Solution Approach 1:
The feedthrough system employs a composite structure combining a metallic wall component (aluminum or aluminum alloy) with polymer sealing elements. This material combination provides both mechanical strength to withstand pressure and temperature, and sealing capability to maintain fluid-tightness under extreme conditions.
Solution Approach 2:
The connection regions feature annular grooves with curved geometries that accommodate sealing elements. The curved design allows uniform distribution of contact forces and enables the sealing elements to deform conformally, ensuring reliable sealing under thermal and pressure variations.
2Ease of manufacture
If simple connection methods are used for feedthrough openings, then manufacturing ease is improved, but service life and durability worsen due to inadequate sealing and mechanical strength
Solution Approach 1:
The feedthrough system is divided into distinct functional segments: the metallic wall component with integrated feedthrough openings, the sealing elements for fluid-tight connection, and the fastening device for mechanical attachment. This segmentation allows each component to be optimized independently and facilitates assembly while ensuring long-term reliability.
Solution Approach 2:
The wall component integrates multiple functions: structural support, feedthrough opening formation, and connection region definition. The fastening device combines mechanical fastening and sealing functions in a single integrated component, simplifying the manufacturing process while ensuring durable service life.
3Device complexity
If inadequate fastening devices are used, then device complexity is reduced, but mechanical integrity and fluid-tightness deteriorate leading to safety risks
Solution Approach 1:
The fastening device performs multiple functions simultaneously: mechanical attachment of the line to the wall component, sealing to prevent fluid leakage, and strain relief to protect the line under thermal and pressure stress. This multi-functionality achieves high reliability without proportionally increasing complexity.
Data Source
AI summary
In order to provide a feedthrough system which can be produced as easily as possible and has an optimized service life, it is proposed that the feedthrough system comprises a wall component which has one or more feedthrough openings, one or more lines which are guided through the one or more feedthrough openings, and a fastening device, the fastening device connecting the one or more lines to the wall component in one or more connection regions of the feedthrough system.