Patent ID: 6233135
Filing Date: 2001-05-15
Classification: H01G,Y02E,Y10T

Abstract:
A double layer capacitor comprising:a capacitor case comprising a first part and a second part fastenable to each other to form a sealed capacitor case, the sealed capacitor case having a first capacitor terminal and a second capacitor terminal associated therewith;an electrode stack comprising a plurality of electrodes, each electrode of the electrode stack comprising a current collector foil and a carbon cloth impregnated with a specified metal in direct physical contact with the current collector foil, and wherein current collector foils of alternating electrodes are coupled to the first capacitor terminal, and the wherein the current collector foils of other alternating electrodes are coupled to the second capacitor terminal;a porous separator material positioned between each electrode of the electrode stack, the porous separator material having pores therein through which ions may readily pass, wherein adjacent electrodes are prevented from electrically contacting each other by the porous separator material;the electrode stack being maintained under a constant modest pressure within the sealed capacitor case; anda prescribed electrolytic solution sealed within the sealed capacitor case, whereby the electrode stack is saturated and immersed within the electrolytic solution.