Patent ID: 7616429
Filing Date: 2009-11-10
Classification: H01G,Y02E,Y02T

Abstract:
1. An electric double layer capacitor comprising a plurality of single cells including a positive electrode layer formed on a positive electrode current collector and a negative electrode layer formed on a negative electrode current collector, which are arranged so as to face each other with a porous separator provided therebetween, the plurality of the single cells being layered and disposed in an exterior case impregnated with an electrolytic solution, and being connected in parallel, wherein: the positive electrode layers are classified into a large capacity positive electrode layer and a small capacity positive electrode layer whose electrostatic capacities are different from each other; the negative electrode layers are classified into a large capacity negative electrode layer and a small capacity negative electrode layer whose electrostatic capacities are different from each other; at least one of the single cells is a combination of the large capacity positive electrode layer and the large capacity negative electrode layer; at least another one of the single cells is a combination of the small capacity positive electrode layer and the small capacity negative electrode layer; a thickness of the separator disposed between the large capacity positive electrode layer and the large capacity negative electrode layer is thicker than the thickness of the separator disposed between the small capacity positive electrode layer and the small capacity negative electrode layer.