JPS649610A - Manufacture of electric double-layer capacitor - Google Patents

Abstract

PURPOSE:To perform impregnation of electrolyte smoothly and to reduce dispersion in characteristics, when the impregnation of the electrolyte is performed, by heating all or parts of the carbon electrodes, a separator and the electrolyte using a far infrared-ray heater. CONSTITUTION:Carbon electrodes 1 are assembled in a metal case 2 and a metal cap 5, which comprise stainless steel, and on the outer surfaces of which an aluminum layers are formed. The conductive electrodes of the carbon electrodes 1 are brought into contact with the inner surfaces of the metal case 2 and the metal cap 5. They are connected by spot welding. The carbon electrodes 1, which are the polarizing electrodes, are impregnated with nonaqueous electrolyte 6, in which 10wt.% tetraethylammonium tetrafluoroborate is added into propylene carbonate. The carbon electrodes 1 are overlapped by way of an ion transmitting separator 3. A packing 4 is arranged at the peripheral part of an opening. The peripheral part of the metal case is curled and packaging is performed. After the electrolyte 6 is dropped, far infrared rays 7 are projected from a far infrared-ray heater on the carbon electrodes 1, and heating is performed. Thus the impregnation of the dropped electrolyte 6 is performed smoothly.