| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a power supply device capable of efficiently suppressing inflow of air from the atmosphere into an exhaust chamber via an exhaust path.SOLUTION: A power supply device 11 comprises: a battery chamber 15 housing batteries; an exhaust chamber 17 partitioned from the battery chamber 15; a communication path 19 for communicating the battery chamber 15 with the exhaust chamber 17; an exhaust path 21 provided in the exhaust chamber 17 and communicated with the outside of the exhaust chamber 17; and an on-off valve 59 for opening and closing the exhaust path 21. A predetermined atmospheric pressure is set higher than atmospheric pressure. When the pressure inside the battery chamber 15 becomes less than the prescribed atmospheric pressure and not less than the atmospheric pressure, the exhaust path 21 is set to be blocked by the on-off valve 59.</p> |
