| 摘要 |
A sealed cell has: a cell outer can 60 having a hollow body with a bottom and an opening; a spirally-wound electrode body 40 accommodated in the above-mentioned cell outer can 60, including a positive electrode plate 20 and a negative electrode plate 30 wound with a separator 41; a sealing lid 50 having a sealing plate 51 sealed to the above-mentioned opening of the cell outer can 60 and an insulating member on a bottom of the above-mentioned sealing plate 51; and a positive electrode current collector tab 24 derived from a portion of an exposed core body of the positive electrode plate 20 on an outermost periphery of the above-mentioned spirally-wound electrode body 40; wherein the positive electrode current collector tab 24, the cell outer can 60 and the sealing plate 51 are welded with a tip of the above-mentioned positive electrode current collector tab 24 being held between the above-mentioned sealing plate 51 and an open rim of the above-mentioned cell outer can 60; a spacer 56 composing the above-mentioned insulating member has a concavity 561 in a portion in which the above-mentioned positive electrode current collector tab 24 is led in a direction of the opening of the above-mentioned cell outer can 60; and the above-mentioned positive electrode current collector tab 24 has a bent portion 241 in the above-mentioned concavity 561. According to this construction, it is possible to provide a sealed cell which can prevent disconnection of a current collector tab inside the cell and improve reliability, even when shock such as a drop of the cell is applied to the cell.
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