Wound-around battery and method of manufacturing the same

捲回型電池及びその製造方法

Abstract

【課題】捲回電極体を構成するシート状の電極と集電部材とが強固に接合された捲回型電池であって、該電極と該集電部材とを該電極体の捲回軸方向の端部で容易に接合し得る捲回型電池を提供する。 【解決手段】本発明に係る捲回型電池1において、捲回電極体10の捲回軸方向Qの両端部のうちの一方の端部12は正極活物質層28の形成されていない活物質層非形成部24が負極30からはみ出た状態で積層されて構成される。他方の端部13は負極活物質層38の形成されていない活物質層非形成部34が正極20からはみ出た状態で積層されて構成される。前記両端部12,13のうち少なくとも一方の端部を構成する活物質層非形成部24,34には、集電部材50,60が接続されている。これら活物質層非形成部24,34には、全域に亘って隣り合う集電箔体22,32の間隙に絶縁性部材18が配置されている。 【選択図】図2
PROBLEM TO BE SOLVED: To provide a wound-around battery capable of easily joining electrodes and collector members at an end in an electrode winding axis direction, in one with sheet-shaped electrodes constituting a wound-around electrode and collector members firmly joined. SOLUTION: In the wound-around battery 1, one end 12 out of both ends in a winding axis direction Q of the wound-around electrode unit 10 is formed by an active material layer non-formed unit 24 where a positive electrode active material layer 28 is not formed, stacked while sticking out of a negative electrode 30. The other end 13 is formed by the active material non-formed unit 34 where a negative electrode active material layer 38 is not formed, stacked while sticking out of a positive electrode 20. To the active material non-formed units 24, 34 composing at least one end of both the ends 12 and 13, a collector members 50, 60 are connected. In these active material layer non-formed units 24 and 34, insulating members 18 are laid out in the gap between the adjoining collector foils 22, 32 all through the area. COPYRIGHT: (C)2010,JPO&INPIT

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