Hermetic Feedthrough in Light Metal Housing via Segmented Reinforcement
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Solution Overview
Problem
Existing battery and capacitor housing components face challenges with hermetic sealing, particularly in light metals, due to issues like corrosion, vibration resistance, and moisture penetration, leading to reduced lifespan and weight inefficiencies.
Innovation Solution
A component design featuring a thin, light structure with a feedthrough opening in glass or glass ceramic material, utilizing a reinforcement ring with outside dimensions at least 1.2 times greater than the glass material, to apply sufficient pressure and ensure hermeticity, thereby enhancing mechanical strength and preventing moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base body thickness is increased to achieve hermetic sealing, then the hermeticity is improved, but the weight increases and interior space decreases
Solution Approach 1:
The housing component is segmented into a thin base body and a separate reinforcement element. The reinforcement element is inserted into a recess in the base body to provide structural support and enable hermetic sealing, while the base body itself remains thin to minimize weight and maximize interior space.
Solution Approach 2:
A glass seal element is introduced as an intermediary component between the base body and the feedthrough conductor. This glass seal element provides the hermetic seal, while the reinforcement element provides mechanical support, allowing the base body to remain thin without compromising sealing reliability.
2Reliability
If the base body thickness is increased to achieve hermetic sealing, then the hermeticity is improved, but the interior space is reduced
Solution Approach 1:
The housing component is segmented into a thin base body and a separate reinforcement element. The reinforcement element is inserted into a recess in the base body to provide structural support and enable hermetic sealing, while the base body itself remains thin to minimize weight and maximize interior space.
Solution Approach 2:
Instead of increasing thickness in the vertical dimension, the solution uses a recess (horizontal dimension) to accommodate the reinforcement element. This allows hermetic sealing to be achieved without increasing the overall thickness of the housing component, thereby preserving interior space.
3Ease of manufacture
If synthetic material insulation is used for power connection, then the manufacturing is simplified, but the temperature resistance and hermeticity are compromised
Solution Approach 1:
The solution uses a composite structure combining a metal reinforcement element with a glass seal element. The glass material provides both electrical insulation and hermetic sealing, while the metal reinforcement provides mechanical strength. This composite approach maintains temperature resistance and hermeticity while achieving manufacturability.
Data Source
AI summary
A component has a component thickness and at least one feedthrough opening, wherein a conductor, such as a substantially pin-shaped conductor, is inserted through the feedthrough opening in a glass or glass ceramic material having a glass material outside dimension and a glazed length, wherein the component has a reinforcement in the region of the feedthrough opening with a component feedthrough opening thickness, wherein the component feedthrough opening thickness is greater than the component thickness and wherein the reinforcement has a reinforcement material outside dimension.