An object of the present invention is to secure a space in a battery case to
house
battery cells or minimum gaps to allow swelling of battery cells, so that the battery
cells can be held in the battery case without play.
A battery pack 1 connects in series and house a plurality of square pole-like
battery cells 3 in a battery case 3, the plurality of battery cells
each having a battery lid 32 positioned at the front side thereof, wherein
a negative pole side tab 37 that is connected to a battery can bottom 35
of a battery cell and extends to the battery lid side, an intermediate connection
tab 36 connecting a positive side pole of the battery cell to a battery
can bottom of adjacent another battery cell and a positive pole side tab 34
connected to a positive pole terminal part of said another battery cell are
provided, and a cell side insulating sheet 50 is provided between the respective
negative pole side tab, intermediate connection tab and the sides of respective
battery cans 31, and a projecting tab for pressing side edge parts 3E
extending in the front and back direction of the respective battery cells, upper
corner ribs 13, small ribs 21 and lower corner ribs 22 (side
edge pressing part) are respectively provided on the inner face of the upper side
case and on the inner face of the lower side case.
