| 摘要 |
PROBLEM TO BE SOLVED: To prevent breakage of an electrode if a module is covered with water, by providing a detecting means for detecting the invasion of water into the module, a gas-generating means for generating a gas pressure based on information from the detecting means, and a draining means for draining the water having infiltrate into the module to the exterior of the module. SOLUTION: When a module is covered with water and the water level in the module has risen to a height H, the water is detected by a water-leakage sensor 17, an open/close valve 13 is opened, and compressed gas 12 is discharged into the module. The pressure in the module is thereby increased, the water level in the module starts to go down, and the water in the module is drained to the exterior of the module. When the water level in the module has reached a height L, the exhaust of the gas is stopped. Thereafter, when the temperature in the module falls, water again infiltrates through gas in a bottom part of the module and the water level in the module rises, but submersion can be prevented by the same process. Accordingly, a battery can be prevented from being broken due to contact of a battery of high temperature with water of room temperature. |
