Solid Electrolyte Capacitor Composite Sheet Insulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Solid electrolyte capacitors face challenges in achieving high withstand voltage and long lifetime due to potential electric discharges through the space between anode and cathode foils, and existing solutions like fiber sheets do not effectively prevent discharges, leading to lower performance compared to conventional electrolyte capacitors.
Innovation Solution
A composite sheet with a resin made of a high-molecular weight compound retained in a fiber sheet is arranged between the housing and the capacitor element, which prevents electric discharges and enhances properties such as oxide film repair, adhesiveness, and heat insulation, thereby improving the capacitor's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fiber sheet is arranged between the bottom surface portion of the housing and the capacitor element to prevent short-circuiting, then withstand voltage is improved, but electric discharge may still occur through the inner space of the fiber sheet
Solution Approach 1:
The patent applies composite materials by combining a fiber sheet with a resin made of high-molecular weight compound to create a composite sheet. This composite structure prevents electric discharge through the inner space of the fiber sheet while maintaining the withstand voltage properties, resolving the contradiction between reliability improvement and harmful factor prevention.
Solution Approach 2:
The resin made of high-molecular weight compound acts as an intermediary substance that fills and seals the inner spaces of the fiber sheet. This intermediary material prevents electric discharge pathways through the fiber sheet while allowing the composite sheet to maintain its structural function for withstanding voltage.
Data Source
AI summary
Provided is a solid electrolyte capacitor which includes: a bottomed cylindrical housing which includes a bottom surface portion and a side surface portion raised from the bottom surface portion, and has an opening portion formed on an edge portion of the side surface portion; a capacitor element which is accommodated in the inside of the housing, and is formed by winding an anode foil and a cathode foil in an overlapping state with a separator interposed therebetween and by filling a space formed between the anode foil and the cathode foil with a solid electrolyte; a sealing member which seals the opening portion of the housing in a state where the capacitor element is accommodated in the inside of the housing; and a composite sheet which is arranged between the bottom surface portion of the housing and the capacitor element, and has the structure where a resin made of a high-molecular weight compound is retained in a fiber sheet containing at least cellulose fibers.