Vehicle battery mounting structure

A vehicle battery mounting structure comprising:

• a relay that electrically connects a battery and a motor when the relay is electrified, and that electrically disconnects the battery and the motor from each other when the relay is not electrified;
• a lock mechanism that fixes the battery to a vehicle main body;
• an actuation member that, when the actuation member is electrified, causes the lock mechanism to fix the battery, and that, when the actuation member is not electrified, causes the lock mechanism to discontinue fixture of the battery;
• an electric power source that supplies electric power to the relay and to the actuation member;
• and
• a switch that (1) in a first connection state, switches on the electrification of the relay and off the electrification of the actuation member which, in conjunction with the lock mechanism, results in the fixing of the battery and (2), in a second connection state, switches off the electrification of the relay and on the electrification of the actuation member which, in conjunction with the lock mechanism, results in the discontinuation of the fixture of the battery,
• wherein the relay and the actuation member are disposed electrically in series in a drive circuit that is supplied with electric power from the electric power source.