Glass-Ceramic Battery Feedthrough with Segmented Conductor
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Solution Overview
Problem
Current lithium-ion battery feedthroughs face issues with resistance losses, space occupation, and hermetic seal reliability due to high resistance and limited temperature resistance of plastic insulation, as well as embrittlement of glass-metal feedthroughs under RF conditions.
Innovation Solution
A feedthrough design featuring a conductor with two sections, one round and one non-round, embedded in glass or glass ceramic, allowing for easy connection and adjustment, and pre-manufacturing of the feedthrough with a base body to minimize space and heat input, using materials like aluminum and glass compositions with low sealing temperatures for improved durability and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic insulation is used for electrodes, then ease of manufacture is improved, but temperature resistance and hermetic seal reliability deteriorate
Solution Approach 1:
The patent changes the material parameter from plastic to glass-ceramic, which has significantly higher temperature resistance and maintains hermetic seal reliability under thermal cycling conditions while still allowing for manufacturable assembly processes
Solution Approach 2:
The patent employs a composite structure combining glass-ceramic material with metal components, creating a feedthrough assembly that achieves both hermetic sealing and electrical insulation properties that neither material could provide alone
2Temperature
If glass-metal feedthrough is used, then temperature resistance is improved, but embrittlement under RF conditions occurs
Solution Approach 1:
The patent modifies the glass composition parameters to create a glass-ceramic material with specific thermal expansion coefficients and dielectric properties that prevent embrittlement under RF heating conditions while maintaining high temperature resistance
Solution Approach 2:
The patent applies different material properties to different regions of the feedthrough, with the glass-ceramic composition optimized for the RF-exposed areas while maintaining overall structural integrity and temperature resistance
3Stability of the object's composition
If conventional feedthrough design is used, then structural stability is maintained, but space occupation and resistance losses increase
Solution Approach 1:
The patent merges the conductor and insulator into an integrated glass-ceramic feedthrough component, eliminating the need for separate insulation elements and reducing overall space occupation while maintaining structural stability
Solution Approach 2:
The patent segments the feedthrough into functional zones within the glass-ceramic structure, allowing optimized conductor paths that reduce resistance losses while maintaining compact dimensions
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
This design reduces resistance losses, minimizes space occupation, and enhances the reliability of the hermetic seal, while allowing for cost-effective integration and adaptation to different battery cells, maintaining structural stability and durability.
Implementation Method 1
at least one conductor, embedded in a glass- or glass ceramic material
Implementation Method 2
enhances the reliability of the hermetic seal
Implementation Method 3
limited temperature resistance of plastic insulation
Data Source
AI summary
A feedthrough, for example through a part of a housing, such as a battery housing, is, for example, made of a metal, such as a light alloy, for example aluminum, an aluminum alloy, AlSiC, magnesium, a magnesium alloy, titanium, a titanium alloy, steel, stainless steel or high-grade steel. The housing part has at least one opening through which at least one conductor having a cross-section is guided in a glass or glass ceramic material. The conductor has at least two sections, a first section having a first, substantially round, for example a circular, cross section having a diameter in the region of the feedthrough through the glass or glass ceramic material, and a second section having a second, substantially non-round, for example a substantially rectangular cross-section, and the conductor is formed in one piece.