Patent ID: 8679660

Claim:
An electric power storage apparatus comprising: a housing; a vertical partition which is placed in the housing to separate a first housing portion and a second housing portion positioned horizontally and adjacently side-by-side; an electric power storage unit which is housed in the first housing portion; a coolant which is housed in the first housing portion and is provided for cooling the electric power storage unit, wherein the coolant is sealed in the first housing portion; a pressure release valve which is formed in the vertical partition and releases an internal pressure of the first housing portion to the second housing portion by changing from a closed state to an open state in an abnormal state of the electric power storage unit in which gas is produced in the electric power storage unit; the second housing portion containing an electronic part that is electrically connected to the electric power storage unit; the second housing portion is filled with gas when the pressure release valve is in the closed state; and the pressure release valve allows the coolant to move from the first housing portion to the second housing portion when releasing the internal pressure of the first housing portion, and allowing the coolant to contact the electronic part.