Patent ID: 7221123

Claim:
An apparatus comprising: an electric vehicle body; a battery container support stand affixed to said vehicle body, said support stand defining a supporting surface, said support stand having a left side and a right side; a positioning structure assembled onto each of said left side and said right side of support stand, said positioning structure comprising: a fixed base extending downwardly from said support stand, said fixed base defining a guiding runner; a positioning member extending through said guiding runner so as to define an insertion portion at an end extending beyond said guiding runner, said positioning member having an opposite end extending outwardly beyond the side of said support stand, said opposite end defining a pulling controller; and a spring connected between said fixed base and said positioning member, said insertion member extending through said spring, said spring urging said insertion member in a direction beyond said guiding runner and urging said pulling controller toward said support stand; and a battery container set having a first case and a second case, each of said first and second cases having a connecting port, the connecting port of one of said first and second cases mounted and embedded into the connecting port of the other of said first and second cases, the connecting ports having positive and negative electrical connections, each of said first and second cases having a battery therein, the batteries having electrodes respectively at said positive and negative electrical connectors, each of said first and second cases having a positioning jack at a bottom thereof, the positioning jack aligned with the insertion portion of said positioning member, said spring urging the insertion member into the positioning jack, said positioning member being pullable outwardly against the urge of said spring such that said insertion member can separate from said positioning jack so as to allow the battery container set to be released from said support stand.