POWER-SUPPLY DEVICE, VEHICLE PROVIDED THEREWITH, AND ELECTRICITY-STORAGE DEVICE

摘要

[Problem] To make a gas duct thinner while minimizing decreases in tolerance during gas discharge. [Solution] A power-supply device is provided with the following: a plurality of battery cells (1), each of which has a gas-discharge port (12) with a gas-discharge valve (11) provided in a first end surface (10); a battery stack (2) comprising the aforementioned plurality of battery cells (1) stacked together; and a gas duct (6) affixed to one surface of the battery stack (2) so as to connect to the gas-discharge ports (12) of the battery cells (1). A metal layer (17) is provided on the part of the inner surface of the gas duct (6) that faces the gas-discharge ports (12).