US 2019/0198255 A1 · Solid Electrolytic Capacitor for Use in Extreme Conditions

Abstract

A capacitor assembly that is capable of performing under extreme conditions, such as at high temperatures and/or high voltages, is provided. The ability to perform at high temperature is achieved in part by enclosing and hermetically sealing the capacitor element within a housing in the presence of a gaseous atmosphere that contains an inert gas, thereby limiting the amount of oxygen and moisture supplied to the solid electrolyte of the capacitor element. Furthermore, the present inventors have also discovered that the ability to perform at high voltages can be achieved through a unique and controlled combination of features relating to the formation of the anode, dielectric, and solid electrolyte. For example, the solid electrolyte is formed from a combination of a conductive polymer and a hydroxy-functional nonionic polymer.

Claims20

Dependent claims

A capacitor assembly comprising:

a capacitor element comprising a sintered porous anode body, a dielectric layer that overlies the anode body, and a solid electrolyte overlying the dielectric layer;
a housing that defines an interior cavity within which the capacitor element is positioned and hermetically sealed;
an anode termination that is in electrical connection with the anode body;
and
a cathode termination that is in electrical connection with the solid electrolyte;
wherein the solid electrolyte contains a first layer that overlies the dielectric layer and a second layer that overlies the first layer, the first layer containing a conductive polymer and the second layer containing a hydroxy-functional nonionic polymer and a conductive polymer.

3 more elements

Dependencies are inferred from the claim text.

Solid Electrolytic Capacitor for Use in Extreme Conditions

Life of this patent

Solid Electrolytic Capacitor for Use in Extreme Conditions

Life of this patent

Abstract

Claims20