US 9,978,528 B2 · High voltage capacitor having a dual tantalum anode/cathode current collector electrode assembly housed in a dual separator envelope design

Abstract

A capacitor having at least two side-by-side anodes with a cathode current collector disposed between the anodes and housed inside a casing is described. Cathode active material is supported on the opposed major faces of the current collector and the current collector/cathode active material subassembly is housed in a first separator envelope. The first separator envelope is positioned between the side-by-side anodes and this electrode assembly is then contained in a second separator envelope. The two anodes can be connected in parallel inside or outside casing, or they can be unconnected to each other. There is also cathode active material supported on inner surfaces of the casing in a face-to-face alignment with an adjacent one of the anodes. That way, the second separator envelope also prevents direct physical contact between the anode pellets and the cathode active material supported on the casing sidewalls.

Claims21

Dependent claims

A capacitor, comprising:

a) a casing;
b) a first anode of a first anode active material and a second anode of a second anode active material, wherein the first and second anodes are housed inside the casing;
c) a cathode comprising a cathode current collector having opposed first and second major faces supporting a first cathode active material thereon;
d) a first separator envelope housing the cathode inside the casing so that the first cathode active material resides between and is aligned with the first and second anodes;
e) a second separator envelope inside the casing, the second separator envelope housing the first and second anodes and the intermediate first separator envelope housing the cathode;
and
f) an electrolyte contacting the cathode and the first and second anodes.

4 more elements

A capacitor, comprising:

a) a casing comprising first and second casing members secured to each other;
b) a first anode of a first anode active material and a second anode of a second anode active material, wherein the first and second anodes are housed inside the casing;
c) a cathode comprising a cathode current collector having opposed first and second major faces supporting a first cathode active material thereon;
d) a first separator envelope housing the cathode inside the casing so that the first cathode active material resides between and is aligned with the first and second anodes, the first separator envelope comprising first and second separator sheets having respective first and second peripheral margins that are secured to the cathode current collector, spaced from the cathode active material;
e) a second separator envelope comprising third and fourth separator sheets having respective third and fourth peripheral margins secured to the respective first and second separator sheets to thereby house the first and second anodes and the intermediate first separator envelope housing the cathode;
f) an anode lead electrically connected to the first and second anodes, the anode lead extending outside the casing and being isolated from the casing by an insulative seal;
and
g) an electrolyte contacting the cathode and the first and second anodes.

5 more elements

Dependencies are inferred from the claim text.

High voltage capacitor having a dual tantalum anode/cathode current collector electrode assembly housed in a dual separator envelope design

Life of this patent

High voltage capacitor having a dual tantalum anode/cathode current collector electrode assembly housed in a dual separator envelope design

Life of this patent

Abstract

Claims21