Innovative Feedthrough Design for Thin Battery Cells
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Summary
Problems
Conventional battery cell feedthroughs are limited in dimension, restricting the thickness of battery enclosures to a minimum, which hinders the use of thin battery cells and increases impedance, thereby limiting the performance and packaging efficiency of lithium-ion batteries.
Innovation solutions
The feedthrough is positioned at a terraced region of the enclosure with a reduced thickness, incorporating an annular channel, insulator, and pin, allowing for a larger cross-sectional area and hermetic sealing, which reduces resistance and impedance, and enables increased packaging efficiency.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If conventional feedthroughs are used in battery enclosures, then hermetic sealing and insulation are achieved, but the enclosure thickness is restricted to a minimum dimension
Why choose this principle:
The feedthrough is repositioned from a side wall location to a terraced surface location on the enclosure. This dimensional relocation allows the feedthrough to utilize the terraced surface area rather than penetrating through the full enclosure thickness, thereby enabling thin enclosure designs while maintaining hermetic sealing capability.
Principle concept:
If conventional feedthroughs are used in battery enclosures, then hermetic sealing and insulation are achieved, but the enclosure thickness is restricted to a minimum dimension
Why choose this principle:
A terraced portion is created at a specific location on the enclosure with reduced thickness relative to other portions. This localized thickness reduction is strategically positioned to accommodate the feedthrough, allowing the rest of the enclosure to maintain its structural integrity and full thickness for hermetic sealing.
Application Domain
Data Source
AI summary:
The feedthrough is positioned at a terraced region of the enclosure with a reduced thickness, incorporating an annular channel, insulator, and pin, allowing for a larger cross-sectional area and hermetic sealing, which reduces resistance and impedance, and enables increased packaging efficiency.
Abstract
The disclosed technology relates to electrical feedthroughs for thin battery cells. A battery cell enclosure includes a terraced portion having a reduced thickness relative to another portion of the enclosure. The enclosure includes an opening disposed on a horizontal surface of the terraced portion for receiving the electrical feedthrough. Because the feedthrough is disposed on the horizontal surface of the terraced portion, the feedthrough may be over-sized thereby reducing the resistance and impedance of the feedthrough without increasing the height or thickness of the enclosure.