Hermetic Capacitor Design for High-Reliability Applications
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Summary
Problems
Conventional multilayer solid aluminum electrolytic capacitors face reliability issues due to non-hermetic resin encapsulation, which allows moisture and corrosive gases to enter, leading to performance deterioration and failure, especially in harsh environments with high humidity and temperature.
Innovation solutions
A highly-reliable multilayer solid aluminum electrolytic capacitor design featuring an inorganic encapsulation case formed by welding a ceramic case with a cover plate, using a rivet to secure axially symmetrical I-shaped cores, and applying insulating blocking adhesive to prevent moisture ingress and stress-induced deformation.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If resin encapsulation is used for cost-effective automated production, then manufacturing cost and productivity are improved, but hermeticity deteriorates allowing moisture and corrosive gases to enter the capacitor
Why choose this principle:
The harmful resin encapsulation material is extracted and removed from the capacitor structure. The patent replaces resin encapsulation with a hermetic metal case structure, eliminating the source of moisture and corrosive gas ingress while maintaining automated manufacturing capabilities through the metal case assembly process
Principle concept:
If resin encapsulation is used for cost-effective automated production, then manufacturing cost and productivity are improved, but hermeticity deteriorates allowing moisture and corrosive gases to enter the capacitor
Why choose this principle:
The encapsulation material parameter is changed from organic resin to inorganic metal materials. This fundamental material parameter change transforms the encapsulation from non-hermetic to hermetic, preventing moisture and corrosive gas penetration while allowing for automated production through standard metal case manufacturing processes
Application Domain
Data Source
AI summary:
A highly-reliable multilayer solid aluminum electrolytic capacitor design featuring an inorganic encapsulation case formed by welding a ceramic case with a cover plate, using a rivet to secure axially symmetrical I-shaped cores, and applying insulating blocking adhesive to prevent moisture ingress and stress-induced deformation.
Abstract
This application provides a multilayer solid aluminum electrolytic capacitor and a method for preparing the same. The multilayer solid aluminum electrolytic capacitor includes a plurality of cores, a rivet, a case, and a cover plate. The cores are stacked in sequence and fastened in the case through the rivet to form a semi-finished capacitor. The semi-finished capacitor is covered by the cover plate and then sealed to form the solid aluminum electrolytic capacitor.