| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve cooling efficiency for battery cells in a battery case. SOLUTION: In a battery cell chamber 4 on the upstream side parted in the battery case 1, an air current is contracted by a contracted vein part 8 immediately before a cooling fan 10 to reduce reduction of flow velocity of cooling blow, so that stagnation of the cooling blow is prevented. A duct area is quickly enlarged immediately after the cooling fan 10 in a static pressure chamber 9, and a velocity component of the cooling air is converted into static pressure, so that cooling blow quantity and blow velocity in a downstream side battery cell chamber 5 are equalized. All the battery cells 2 in the battery case 1 can thus be equally cooled, thereby cooling efficiency to the battery cells 2 can be improved.</p> |
