Vibration durability high-energy hybrid tantalum capacitor

By using a closed PTFE cup-fork support and fluororubber insulating ring in a high-energy hybrid tantalum capacitor, the problems of cathode plate detachment and high pressure on the insulating ring were solved, achieving higher vibration durability and capacitor performance stability.

CN224110150UActive Publication Date: 2026-04-10CHINA ZHENHUA GRP XINYUN ELECTRONICS COMP ANDDEV CO LTD
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Patent Information

Application Number
CN202520474727.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-18
Publication Date
2026-04-10
Estimated Expiration
2035-03-18

AI Technical Summary

Technical Problem

Existing high-energy hybrid tantalum capacitors suffer from reduced negative electrode capacity and deteriorated leakage current due to the ruthenium dioxide plating on the cathode plate peeling off during vibration. At the same time, the insulating ring is subjected to high pressure, has poor fixing effect, and insufficient vibration resistance.

Method used

The cathode plate is physically isolated from the outer shell by a closed PTFE cup-shaped support and a fluororubber insulating ring, which reduces friction and increases the force-bearing area by increasing the fluororubber insulating ring, thus improving the fixing effect.

Benefits of technology

It effectively avoids damage to the cathode plate coating, enhances the vibration durability of the capacitor, and improves the capacitance retention rate and leakage current resistance of the capacitor.

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Abstract

The utility model discloses a vibration durability high-energy hybrid tantalum capacitor, which comprises a shell, a seat support, a tantalum core, an insulation structure and a cover plate, the seat support, the tantalum core, the insulation structure and the cover plate are sequentially arranged in the shell from bottom to top, the tantalum core is arranged in the seat support, a lead is arranged on the tantalum core, and the cover plate is respectively connected with the shell and the insulation structure. The lead is provided with a pipe sleeve and sequentially penetrates through the insulation structure and the cover plate to extend out of the shell. The first cathode piece is physically isolated from the bottom of the tantalum shell through the seat support, the cathode ruthenium dioxide plating layer is prevented from being damaged in the vibration process, meanwhile, due to the fact that the seat support is designed to be closed, the tantalum core is fixed, and meanwhile insulation between the tantalum core and the tantalum shell is achieved. The fluororubber insulation ring is adopted to replace a traditional insulation upper gasket and a PTFE insulation ring, the number of internal parts is reduced, the stress area of the insulation ring is increased, 70% compression amount is adopted for fluororubber materials, and the buffer space of longitudinal fixed stress is increased.
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