| 摘要 |
Occurrence of noise and invasion of grit or dust are prevented and occurrence of condensed water is suppressed. A battery device having a battery which is mounted in a battery case to accumulate power to be demanded and supplied to a motor for driving a vehicle is characterized in that the battery case is designed in a hermetically-sealed structure, a heat exchanger for cooling ambient atmosphere in the battery case and an air blower for blowing cold air of the heat exchanger to the battery are provided in the battery case, and inert gas or dried air is hermetically filled in the battery case under a state that the battery case is hermetically sealed.
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