Patent ID: 9343727
Filing Date: 2016-05-17
CPC Classification: H01G,H01M,Y02E,Y02P,Y02T

Claim Text:
1. An electricity storage device, comprising: one or more positive electrodes each having an edge portion and a tab on the edge portion; one or more negative electrodes each having an edge portion and a tab on the edge portion; an electrode assembly configured such that the positive electrodes and the negative electrodes are alternately stacked in a state in which the positive electrodes and the negative electrodes are insulated from each other; an electrode terminal, which transfers electricity between the electrode terminal and the electrode assembly; a conductive member, which electrically connects the electrode assembly and the electrode terminal; tab groups each including tabs of the positive electrodes or tabs of the negative electrodes bundled in a stacking direction of the electrode assembly, wherein the tab groups are provided on an edge portion of the electrode assembly and connected to the conductive member; and a case, which accommodates the conductive member and the electrode assembly, wherein the tab groups each include a first bent portion, which is curved or bent, and an extending portion, which extends from the first bent portion in the stacking direction of the electrode assembly, each extending portion includes a connecting portion electrically connected to the conductive member, and the tab groups each include a second bent portion at which the tab group is curved or bent such that a distal end in the extending direction of the tab that is located at an outermost position of the first bent portion is positioned between the electrode assembly and the tab that is located at an innermost position of the first bent portion.