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A method of making a double layer capacitior includes first and second flat stacks of electrodes adapted to be housed in a closeable two-part capacitor case which includes only a single electrolyte seal. Each electrode stack has a plurality of electrodes connected in parallel, with the electrodes of

A method of making a double layer capacitior includes first and second flat stacks of electrodes adapted to be housed in a closeable two-part capacitor case which includes only a single electrolyte seal. Each electrode stack has a plurality of electrodes connected in parallel, with the electrodes of one stack being interleaved with the electrodes of the other stack to form an interleaved stack, and with the electrodes of each stack being electrically connected to respective capacitor terminals. A porous separator is positioned against the electrodes of one stack before interleaving to prevent electrical shorts between the electrodes. The electrodes are made by folding a compressible, low resistance, aluminum-impregnated carbon cloth, made from activated carbon fibers, around a current collector foil, with a tab of the foils of each electrode of each stack being connected in parallel and connected to the respective capacitor terminal. The height of the interleaved stack is somewhat greater than the inside height of the closed capacitor case, thereby requiring compression of the interleaved electrode stack when placed inside of the case, and thereby maintaining the interleaved electrode stack under modest constant pressure. The closed capacitor case is filled with an electrolytic solution and sealed. A preferred electrolytic solution is made by dissolving an appropriate salt into acetonitrile (CH.sub.3 CN). In one embodiment, the two arts of the capacitor case are conductive and function as the capacitor terminals.

대표청구항 ▼

[ What is claimed is:] [1.] A method of making a double layer capacitor comprising:impregnating metal into carbon fiber bundles of each of a plurality of carbon cloths forming a plurality of impregnated carbon cloths;forming a plurality of current collector foils, each of the plurality of current co

[ What is claimed is:] [1.] A method of making a double layer capacitor comprising:impregnating metal into carbon fiber bundles of each of a plurality of carbon cloths forming a plurality of impregnated carbon cloths;forming a plurality of current collector foils, each of the plurality of current collector foils having a tab portion and a paddle portion;bonding the tab portion of each of one half of the plurality of current collector foils to each other and to a first capacitor terminal, thereby forming a first plurality of bonded current collector foils;bonding the tab portion of each of another half of the plurality of current collector foils to each other and to a second capacitor terminal, thereby forming a second plurality of bonded current collector foils;forming, respectively, a first plurality of electrodes and a second plurality of electrodes by positioning one of the plurality of impregnated carbon cloths against respective paddle portions of each of the first plurality of bonded current collector foils and respective paddle portions of each of the second plurality of bonded current collector foils, wherein each of the first and second plurality of electrodes comprises one of the plurality of bonded current collector foils and the one of the plurality of impregnated carbon cloths;interleaving the first plurality of electrodes and the second plurality of electrodes with respective porous separator portions positioned between each of the first and second plurality of electrodes, wherein the porous separator portions function as electrical insulators between adjacent ones of the first and second plurality of electrodes preventing electrical shorting against each other, thereby forming an interleaved electrode stack;applying a constant pressure against the interleaved electrode stack;saturating the interleaved electrode stack with an electrolytic solution; andmaintaining the interleaved electrode stack immersed within the electrolytic solution.