ELECTRICITY STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To prevent a positive electrode terminal and a negative electrode terminal from being corroded even upon condensation in the housing in an electricity storage device buried with a storage battery accommodated in a housing. SOLUTION: An electricity storage device is provided with a storage battery 4 including a positive electrode terminal 7 and a negative electrode terminal 8 and a housing 5 for accommodating this storage battery 4 and is so constructed as to satisfy at least one of a first condition of maintaining the potential of the negative electrode terminal 8 lower than a ground surface potential and a second condition of maintaining the potential of the positive electrode terminal 7 higher than the ground surface potential. Alternatively, at least one of the positive electrode terminal 7 and the negative electrode terminal 8 is arranged to face downward. COPYRIGHT: (C)2010,JPO&INPIT