| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent lowering of battery performance caused by a temperature difference by uniformly cooling total power supply modules stored in a holder case. SOLUTION: This power supply unit is equipped with a holder case storing plural slender power supply modules 1 inside, and cooling air is passed on the surface of the power module by passing air through the holder case. In this power supply unit, an air inlet 35 is formed by opening one end of the holder case, an air outlet 36 is formed by opening its another end and an air duct 37 is formed between them. An intermediate air supply inlet 38 is opened halfway on the duct 37. The power supply modules 1 stored in the holder case in plural rows are cooled by the outside air sucked into the duct 37 from both the air inlet 35 and the intermediate air supply inlet 38. |
