BATTERY PACK

摘要

A space for housing battery cells or a minimum gap for accommodating expanding battery cells is ensured in a battery case, and housed battery cells are prevented from loosening. A battery pack 1 comprising a plurality of quadratic-prism-shaped battery cells 3 that are series-connected and housed in a battery case 2, wherein a plurality of battery cells have, with a battery lid 32 positioned in front of the following tabs, a cathode-side tab 37 connected to the battery can bottom 35 of one battery cell and extending up to the battery lid, an intermediate connection tab 36 connecting the anode terminal unit 33 of one battery cell to the battery can bottom of another adjacent the battery cell, and an anode-side tab 34 connected to the anode terminal of the other battery cell, and wherein cell-side insulation sheets 50 are disposed between respective cathode-side tab and intermediate connection tab and respective battery-can 31 side-surfaces, and a projection 12, an upper corner rib 13, a small rib 21, a lower corner rib 22 side edge holding unit, that hold down the longitudinally-extending side edge 3E of each battery cell when an upside case 10 and a downside case 20 are combined, are respectively provided on the inner surface of the upside case and on the inner surface of the downside case.