Capacitor module

The capacitor module design addresses the challenge of reducing inductance and impedance by employing a busbar configuration with overlapping extension portions and a sealed case, achieving miniaturization and improved reliability.

WO2026063027A1PCT designated stage Publication Date: 2026-03-26MURATA MFG CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2025-07-14
Publication Date
2026-03-26

AI Technical Summary

Technical Problem

Existing capacitor modules face limitations in reducing inductance without increasing their size, leading to increased impedance and heat generation, which can exceed the guaranteed temperature limits.

Method used

The capacitor module design includes a first and second busbar configuration with specific extension and connection portions that overlap to minimize inductance, utilizing a comb-like shape and alternating projections to ensure creepage distance and reduce electric field interference, while being housed within a sealed case to maintain module size.

Benefits of technology

This configuration effectively reduces inductance and impedance, preventing excessive heat generation and allowing for a miniaturized capacitor module with improved reliability and design flexibility.

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Abstract

A capacitor module according to the present disclosure comprises: a capacitor element having a first electrode, a second electrode, and a lateral surface; a first busbar electrically connected to the first electrode; and a second busbar electrically connected to the second electrode. The first busbar has a first extension portion, a first connection portion, a second extension portion, and a first terminal portion. The second busbar has a second contact portion, a third extension portion, a second connection portion, a fourth extension portion, and a second terminal portion. The second extension portion and the fourth extension portion are arranged so as to overlap at least partially when viewed from a direction perpendicular to the plane in which the second extension portion and the fourth extension portion extend.
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Citation Information

Patent Citations

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    JP2007299888A

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