| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress a decrease in area where a refrigerant flows and an increase in pressure loss. <P>SOLUTION: A battery pack includes a battery group in which a plurality of electric cells are arranged and a first refrigerant passage for leading a refrigerant between the electric cells adjacent each other in the arrangement direction is formed. A plurality of first projections are formed in the first refrigerant passage. Each of the first projections includes: a first arc-shaped part projecting toward the upstream side of the first refrigerant passage; and a pair of first taper-shaped parts extending from both ends of the first arc-shaped part toward the downstream side of the refrigerant passage and coming close to each other. <P>COPYRIGHT: (C)2013,JPO&INPIT |
