초록 ▼

An electric double layer capacitor comprises a first electrode 31 comprising a belt-like electricity collecting material 31a having both surfaces on which electrode layers 31b, 31c are formed leaving belt-like portions in a side of the belt-like electricity collecting material 31a along its longitud

An electric double layer capacitor comprises a first electrode 31 comprising a belt-like electricity collecting material 31a having both surfaces on which electrode layers 31b, 31c are formed leaving belt-like portions in a side of the belt-like electricity collecting material 31a along its longitudinal direction, a second electrode 32 having the same structure as the first electrode 31, belt-like separators 33a, 33b to electrically insulate the first and second electrodes 31, 32, a post-like winding core 40 on which the first and second electrodes 31, 32 and the separators 33a, 33b are wound to thereby form a cylindrically wound element 50, a first electricity collecting plate 72 in contact with the belt-like portion 31ax, a second electricity collecting plate 62 in contact with the belt-like portion 31ax, wherein the belt-like portions 31ax, 32ax are located at opposing positions in the wound element 50, both ends of the winding core 40 are respectively in contact with the first and second electricity collecting plates 72, 62 to determine the relative positions in axial directions of the first and second electricity collecting plates 72, 62, and the electricity collecting plates 72, 62 are electrically insulated. In the capacitor, tab-like electricity collecting leads are not required, manufacture is easy to shorten a time for manufacturing, and the capacity density per volume is high.

대표청구항 ▼

[ What is claimed is:] [1.]1. An electric double layer capacitor which comprises:a first electrode comprising a belt-like electricity collecting material having at least one surface on which an electrode layer is formed leaving a belt-like portion in a side of the belt-like electricity collecting ma

[ What is claimed is:] [1.]1. An electric double layer capacitor which comprises:a first electrode comprising a belt-like electricity collecting material having at least one surface on which an electrode layer is formed leaving a belt-like portion in a side of the belt-like electricity collecting material along its longitudinal direction,a second electrode comprising a belt-like electricity collecting material having at least one surface on which an electrode layer is formed leaving a belt-like portion in a side of the belt-like electricity collecting material along its longitudinal direction,belt-like separators interposed between the first electrode and the second electrode to electrically insulate them,a post-like winding core having two ends, on which the first electrode, the second electrode and the separators are wound to thereby form a cylindrically wound element,a first electricity collecting plate in contact with the belt-like portion of the first electrode to collect electricity, anda second electricity collecting plate in contact with the belt-like portion of the second electrode to collect electricity, whereinthe belt-like portion of the first electrode and the belt-like portion of the second electrode are, respectively, at opposing positions in the cylindrically wound element, further whereinthe two ends of the winding core are, respectively, in direct or indirect contact with the first electricity collecting plate and the second electricity collecting plate to determine the relative positions in axial directions of the first electricity collecting plate and the second electricity collecting plate are electrically insulated, and further whereina casing of bottomed cylindrical form is provided to house the cylindrically wound element, a winding core receptor is fixed to a bottom portion of the casing, and the winding core is fixed to the casing by means of the winding core receptor.