Power storage device and water entry detection method

Abstract

A power storage device includes: a battery pack; a lower case having a groove receding downward of a lower end of the battery pack and provided outward of a placement surface on which the battery pack is placed directly or indirectly; a first detection line including a first exposed conductive portion disposed inside the groove; a second detection line including a second exposed conductive portion disposed inside the groove at a predetermined distance from the first exposed conductive portion; and an electronic device to which the first and second detection lines are connected, and that measures a resistance or potential difference between the first and second detection lines. A water entry detection method includes: measuring the resistance or potential difference between the first and second detection lines; and estimating that water entry has occurred when the measured resistance or potential difference is equal to or less than a predetermined value.

Dependencies are inferred from the claim text.