POWER STORAGE DEVICE

摘要

The objective of the invention is to obtain a power storage device wherein infiltration of a fluid such as water by passage through a gas exhaust tube is prevented. This power storage device 100 comprises: a power storage case 2 housing a battery cell; a gas exhaust tube 150 establishing communication between the interior and the exterior of the power storage case; and an infiltration prevention mechanism unit 153 preventing a fluid from passing through the gas exhaust tube 150 and infiltrating the interior of the power storage case 2 from the exterior thereof. The infiltration prevention mechanism unit 153 comprises: a valve case 153d having a flow path establishing communication between the interior and the exterior of the power storage case 2; a valve body 153c housed in the valve case 153d and selectively movable to a shut position and an open position; and a guide member 153e for guiding the valve body 153c to be movable along the flow direction of the fluid.