Patent ID: 11962026
Assignee: SANYO ELECTRIC CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 0:
1. A power supply device, comprising:
a plurality of secondary battery cells each including an exterior can having a quadrangular shape and a sealing plate closing an otherwise open end of the exterior can, the plurality of secondary battery cells including a first secondary battery cell and a second secondary battery cell adjacent to the first secondary battery cell, the plurality of secondary battery cells forming a battery stack;
a separator having insulating properties and interposed between the first secondary battery cell and the second secondary battery cell;
one pair of end plates covering both end faces of the battery stack; and
a plurality of fastening members fastening the one pair of end plates together,
wherein,
the separator has a main face including a flat face and a first protruding face, each of the flat face and the first protruding face configured to face the first secondary battery cell,
the first protruding face is nearer to the first secondary battery cell than the flat face in a stacking direction of the battery stack,
the flat face has a first region and a second region both facing an upper peripheral portion of the first secondary battery cell which is adjacent to the otherwise open end closed with the sealing plate of the first secondary battery cell, and
the first protruding face is positioned between the first region and the second region,
wherein an uppermost peripheral edge of the first protruding face is aligned with an uppermost surface of the first secondary battery cell where the sealing plate thereof is located, and
wherein the first protruding face is a linear protrusion not connected with another protruding portion of the separator in a height direction of the first secondary battery cell.