| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an excellent battery pack having a cooling structure of a square secondary battery while suppressing swelling of a battery can.SOLUTION: In a battery pack 81, a plurality of square batteries 1 in each of which a flat type wound electrode group 31 is housed with a winding axis direction X of the flat type wound electrode group extending in a cell width direction Cw of a battery can 11 are juxtaposed, spacers 101 are interposed between battery cans 11 adjacent to each other, and passages of a cooling medium are thereby formed between the battery cans 11. The plurality of spacers 101 are disposed with prescribed intervals kept in a cell height direction Ch of the battery can 11, and each of the spacers has a waveform in which a first inclined part shifting toward the upper side of the cell height direction Ch of the battery can 11 as it shifts from one side of the cell width direction Cw to the other side thereof, and a second inclined part shifting toward the lower side of the cell height direction Ch are alternately and continuously formed in the cell width direction Cw.</p> |
