Composite Terminal Pin Feedthrough for Corrosion-Resistant Energy Storage
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Solution Overview
Problem
Existing electrical feedthroughs for energy storage devices face challenges in reliably manufacturing terminal pins made of various materials, particularly to prevent corrosion and ensure compatibility with battery or capacitor materials.
Innovation Solution
The proposed electrical feedthrough features a terminal pin with a core made of a first electrically conductive material, covered on one side with a second electrically conductive material, which is designed to be inaccessible on one side of the feedthrough. This configuration allows for adaptation to both the needs of the battery and the metal fixing material feedthrough, ensuring compatibility and preventing corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal pin is made of a single material adapted to battery materials, then corrosion resistance is improved, but compatibility with metal fixing material feedthrough manufacturing is worsened
Solution Approach 1:
The terminal pin is constructed as a composite structure with a core made of a first electrically conductive material and a covering material made of a second electrically conductive material. This allows the core to be optimized for mechanical strength and the covering material to provide corrosion resistance while being compatible with the metal fixing material feedthrough manufacturing process.
Solution Approach 2:
Different parts of the terminal pin have different material properties: the core provides structural integrity and electrical conductivity, while the covering material provides corrosion resistance. This local differentiation of material quality allows each region of the terminal pin to be optimized for its specific function.
2Ease of manufacture
If a terminal pin is made of a single material adapted to feedthrough manufacturing, then ease of manufacture is improved, but corrosion resistance is worsened
Solution Approach 1:
The terminal pin combines two different electrically conductive materials in a composite structure, allowing the core to be optimized for manufacturing compatibility while the covering material provides the necessary corrosion resistance for battery applications.
Solution Approach 2:
The covering material is applied locally to the core, providing corrosion protection only where needed while maintaining the manufacturing advantages of the core material. This local quality differentiation resolves the contradiction between ease of manufacture and corrosion resistance.
3Reliability
If the core material is made accessible on all sides, then electrical conductivity is improved, but corrosion risk is worsened
Solution Approach 1:
The covering material is applied to specific regions of the core, leaving certain areas accessible for electrical conductivity while protecting other areas from corrosion. This selective local quality allows the core material to be exposed where electrical contact is needed while being protected where corrosion is a risk.
Solution Approach 2:
The composite structure of core and covering material allows strategic exposure of the conductive core material in areas requiring electrical contact while the covering material protects exposed surfaces from corrosion, resolving the contradiction between conductivity and corrosion resistance.
Data Source
AI summary
An electrical feedthrough, in particular for an electrical storage device, is provided. The electrical feedthrough comprises a main body with a through-opening and a terminal pin, which is arranged in the through-opening and is held in the through-opening in an electrically insulating manner by a fixing material. It is also provided that the terminal pin has a core of a first electrically conductive material and that, at least on a first side of the electrical feedthrough, a first end face of the core is covered by a covering material of a second electrically conductive material, wherein the terminal pin and the fixing material are formed and arranged in such a way that, on the first side of the electrical feedthrough, the first electrically conductive material of the core is inaccessible.