| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery pack that enables plural battery cells to be easily exposed to cooling air to reduce dispersion of cooling among the plural battery cells even when the plural battery cells are arranged vertically in parallel in a housing case.SOLUTION: Spaces M1, M2 are set and a sixth section rib 476b is provided in a lower case 32 for setting a flow pass through which cooing air flows. In order to make cooling air from the rear sides of battery cells 72 to the front sides thereof, the cooling air is split into two parts and flow in the right and left directions corresponding to the arrangement direction of the battery cells 72. That is, before a first battery cell 721 and a third battery cell 723 are cooled by a first air flow pass range Q1 and a third air flow pass range Q3, a second battery cell 722 is cooled by a second air flow pass range Q2. The section cooled by the first air flow pass range Q1 and the third air flow pass range Q3 is longer than the section cooled by the second air flow pass range Q2.SELECTED DRAWING: Figure 16 |
