ELECTRICITY STORAGE DEVICE

摘要

An electricity storage device includes an electrode group including a plurality of first electrodes, a plurality of second electrodes, and separators that electrically insulate the plurality of first electrodes and the plurality of second electrodes, an electrolyte, a case having an opening and accommodating the electrode group and the electrolyte, a sealing plate that seals the opening of the case, a first terminal plate including a first external terminal and disposed on a first principal surface side of the sealing plate, a first connection member that electrically connects the plurality of first electrodes and the first terminal plate, and a first gasket that electrically insulates the first terminal plate and the first connection member from the sealing plate.

主权项

1. An electricity storage device comprising:
an electrode group including a plurality of first electrodes, a plurality of second electrodes, and separators that electrically insulate the plurality of first electrodes and the plurality of second electrodes; an electrolyte; a case having an opening and accommodating the electrode group and the electrolyte; a sealing plate that seals the opening of the case; a first terminal plate including a first external terminal and disposed on a first principal surface side of the sealing plate; a first connection member that electrically connects the plurality of first electrodes and the first terminal plate; and a first gasket that electrically insulates the first terminal plate and the first connection member from the sealing plate, wherein each of the first electrodes includes a sheet-shaped first current collector and a first active material carried on the first current collector, each of the second electrodes includes a sheet-shaped second current collector and a second active material carried on the second current collector, the first electrodes and the second electrodes are alternately stacked with the separators disposed therebetween, the first connection member includes a first lead electrically connected to the plurality of first electrodes and a first rivet electrically connected to the first lead and fixed to the first lead, the sealing plate, the first terminal plate, and the first gasket respectively have a first through-hole, a second through-hole, and a third through-hole which are coaxially arranged and into which the first rivet is inserted, and the first terminal plate and the first gasket are fastened to the sealing plate by the first rivet inserted into the first through-hole, the second through-hole, and the third through-hole.