Patent ID: 6896993
Filing Date: 2005-05-24
Classification: H01G,H01M,Y02E,Y02P

Abstract:
1. An electrochemical device comprising: a first electrode having electrode layers on at least one of surfaces of a strip shaped first collector other than a first strip shaped portion along a side of a strip shaped longitudinal direction of the first collector; a second electrode having electrode layers formed on at least one of surfaces of a strip shaped second collector other than a second strip shaped portion along a side of a strip shaped longitudinal direction of the second collector; strip shaped separators configured to electrically insulate the first electrode from the second electrode by intervening therebetween; a first collector plate configured to collect electricity from a connection with the first strip shaped portion, said first collector plate welded to said first strip shaped portion; a second collector plate configured to collect electricity from a connection with the second strip shaped portion, said second collector plate welded to said second strip shaped portion; a case having an opening portion configured to accommodate the first electrode, the second electrode, the separators, the first collector plate, and the second collector plate; a sealing lid configured to seal the opening portion; a first terminal connected to the first collector plate or monolithically formed with the first collector plate so as to be connected to an outside of the case; a second terminal connected to the second collector plate or monolithically formed with the second collector plate so as to be connected to an outside of the case, wherein the first terminal and the second terminal are respectively connected to the sealing lid and the case, the first electrode, the second electrode, and the separators are piled and wound to form a tubiform winding element, the first strip shaped portion and the second strip shaped portion are arranged respectively on opposite end surfaces of the cylindrical winding element.