HIGH VOLTAGE DUAL ANODE TANTALUM CAPACITOR WITH FACING CASING CLAMSHELLS CONTACTING AN INTERMEDIATE PARTITION

摘要

A wet tantalum capacitor of a dual anode design is described. The anodes are housed in their own casing compartments, which are separated from each other by an intermediate partition. Preferably, the casing comprises two clamshell-shaped members that house respective anodes. The clamshells face each other, but are prevented from direct contact by the intermediate partition. The clamshells are welded to opposite sides of the partition to hermetically seal the casing. Prior to sealing, however, cathode active material is contacted to inner face walls of the clamshells and the opposite sides of the partition. The cathode active material is aligned in a face-to-face relationship with major surfaces of the anodes. Preferably, a polymeric restraining device prevents the anode from contacting the case. The hermetically sealed casing is filled with electrolyte thru a port. The fill port is hermetically sealed to complete the capacitor.

主权项

1. A capacitor, comprising:
a) a first casing member comprising a first major face wall joined to a first surrounding sidewall extending to a first annular edge; b) a first cathode active material supported by and in electrical contact with at least a portion of a first inner face wall of the first casing member; c) a first anode contained in the first casing member spaced from the first cathode active material; d) a second casing member comprising a second major face wall joined to a second surrounding sidewall extending to a second annular edge; e) a second cathode active material supported by and in electrical contact with at least a portion of a second inner face wall of the second casing member; f) a second anode contained in the second casing member spaced from the second cathode active material; g) a first separator and a second separator preventing direct physical contact between the respective first and second anodes and the first and second cathode active materials supported on the respective first and second inner casing face walls while allowing for ion flow therethrough; h) a partition having opposed first and second major partition surfaces extending to an annular partition edge, wherein the first annular edge of the first casing member is contacted to the first major partition surface, and the second annular edge of the second casing member is contacted to the second major partition surface to thereby close the casing; and i) a working electrolyte contacting the first and second cathode active materials and the first and second anodes.