Patent attributes
A battery pack includes a battery case for accommodating battery cells for mounting to and detaching from an electric vehicle. Male-side terminals are accommodated in a terminal base provided on the vehicle body side with battery side terminals being provided that are connected to the male-side terminals from above. An upper surface of the terminal base is formed with vehicle body side engagement parts with battery case side engagement parts being provided that are engaged with the vehicle body side engagement parts from above. The vehicle body side engagement parts are disposed at positions deviated to one side from the vehicle-width-directional center. The battery case side engagement parts are disposed at positions deviated to vehicle-width-directionally one side of the battery case, and are formed at vehicle-longitudinal-directionally both end portions of the battery case, in order that the battery case side engagement parts can fit the vehicle body side engagement parts.