Connecting structure of plug-in capacitor and aluminum substrate

By combining the plug-in connector with the capacitor body, the problem of difficult welding of plug-in capacitors to aluminum substrates is solved, achieving stable connection and efficient welding, and improving the fixing strength and service life of the capacitor body.

CN224400220UActive Publication Date: 2026-06-23WUXI ZERO DRIVE TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202521456272.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-11
Publication Date
2026-06-23
Estimated Expiration
2035-07-11

AI Technical Summary

Technical Problem

In electric vehicle electronic control systems, the welding connection between plug-in capacitors and aluminum substrates is challenging. The shape of the capacitor corners makes it difficult for the solder to cover the components evenly, which can easily lead to incomplete or missing welds. Furthermore, high positioning accuracy is required, as even a small deviation during welding can affect the connection strength and conductivity.

Method used

The capacitor adopts a combined structure of connector and capacitor body. The capacitor body is first inserted into the connector and then welded to the aluminum substrate through the capacitor corner. The connector is provided with through holes and U-shaped notches to facilitate positioning and adjustment. The capacitor corner is bent and then welded to improve the fixing strength and welding efficiency.

Benefits of technology

This achieves a stable connection between the capacitor body and the aluminum substrate, avoiding poor soldering and missing soldering, improving welding efficiency and strength, enhancing the fixing strength and temperature uniformity of the capacitor body, and extending its service life.

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Abstract

The utility model relates to the technical field of controllers, in particular to a connecting structure of a plug-in capacitor and an aluminum substrate. The capacitor comprises an aluminum substrate and a capacitor body, a connecting piece is arranged between the capacitor body and the aluminum substrate, the capacitor body is welded on the aluminum substrate, the connecting piece is provided with through holes corresponding to capacitor corners of the capacitor body, the capacitor corners penetrate through the corresponding through holes, and the capacitor body is welded on the aluminum substrate. The capacitor body is provided with a connecting piece, the capacitor corner close to one end of the aluminum substrate is bent and pressed on the connecting piece, the outer wall face of the capacitor corner abuts against the lower end face of the connecting piece, the capacitor body is fixedly connected with the connecting piece, and the bent section of the capacitor corner is welded to the aluminum substrate. According to the technical scheme, the problem that the capacitor body is difficult to weld on the aluminum substrate is solved.
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