| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent battery performance from being deteriorated caused by the temperature difference, by uniformly cooling all battery units stored in a holder case. SOLUTION: A power supply unit is provided with a holder case 2 storing a plurality of battery units 1 and cools the stored battery units 1 by taking the inside of the holder case 2 as an air duct 6. Air discharge ports 8 are opened on both ends of the holder case 2, and intermediate air inflow ports 7 are opened through the holder case 2 on the way of the air ducts 6. Air is allowed to flow from the intermediate air inflow ports 7 to the air ducts 6 to cool the stored battery units 1.</p> |
