Floor structure of electric vehicle

A floor structure of an electric motor vehicle powered by batteries mounted thereon, comprising:

• an upper unit including a first panel and a first base structure, said first panel being a floor panel of said vehicle, said first base structure being mounted on a lower surface of said first panel and including laterally extending front and rear cross members and two longitudinally extending side members by which members a first given space facing downward is defined;
• a lower unit including a second panel and a second base structure, said second base structure being mounted on an upper surface of said second panel to define a second given space which faces upward, said first base structure of the upper unit being mounted on said second base structure of the lower unit such that said first and second given spaces face each other and are merged with each other;
• partition means for dividing the second given space of said lower unit into a plurality of container spaces, each container space being sized to contain therein at least one of said batteries;
• and
• connecting means for detachably connecting the first base structure of said upper unit with the second base structure of said lower unit thereby to merge said first and second given spaces.