| 摘要 |
This battery pack comprises a plurality of batteries 121, a casing 110, a circulation passage 130, and an air blower 140. The circulation passage 130 comprises a bottom wall side passage 135 formed between the lower extremity surface 121a of each of the batteries 121, and a bottom wall 112 serving as the bottom portion side of the casing 110. A plurality of beams 118 for reinforcing the casing 110 are provided so as to be aligned on the bottom wall 112, and the batteries 121 are disposed above the beams 118. Each bottom wall side passage 135 is formed as a space enclosed by the lower extremity surface 121a of each of the batteries 121, the bottom wall 112, and beams 118. The width dimension of a bottom wall side passage 135 formed between one beam 118 and an adjacent beam 118 is set to be greater than the width dimension of one beam 118. |
