Patent ID: 7177139
Filing Date: 2007-02-13
Classification: H01G,Y02E

Abstract:
1. An electrical double layer capacitor comprising: a positively polarized electrode in which positive electrode layers are attached, in a covered manner, to surfaces of both sides of a first power collecting body formed in a foil shape or a thin sheet shape; a negatively polarized electrode in which negative electrode layers are attached, in a covered manner, to surfaces of both sides of a second power collecting body formed in a foil shape or a thin sheet shape; and a separator; wherein said positively polarized electrode and a negatively polarized electrode are wound with a separator being interposed between said positively polarized electrode and said negatively polarized electrode; wherein an electrical double layer is formed at an interface between an electrolytic solution with which said positive electrode layers, said negative electrode layers, said separator are impregnated and, when a voltage is applied, electric charges are accumulated in an electrostatic capacitor of said electrical double layer; and wherein said negatively polarized electrode is so configured as to cover all surfaces of said positively polarized electrode and portions of said negatively polarized electrode not facing said positive electrode serve as non-covered portions in which said negative electrode layer is not attached in a covered manner.