Battery box floor for electric vehicles and corresponding vehicle body

A vehicle body, comprising:

• a battery box floor, wherein the batter box floor comprises:
• a battery pack supporting panel for supporting a plurality of battery cells;
• a plurality of lower cooling channels for containing a cooling fluid, said plurality of lower cooling channels being arranged adjacent to and below said battery pack supporting panel such that they can cool said battery cells;
• and
• an underbody protection arranged below said plurality of lower cooling channels, wherein:
• a deformation inner cavity is provided between said plurality of lower cooling channels and said underbody protection,
• said battery box floor is integrally formed from a metallic material,
• said metallic material is an aluminium alloy, and
• said battery box floor is made up of at least one extruded part of said aluminium alloy, said extruded part forming said supporting panel, said lower cooling channels, said deformation inner cavity, and said underbody protection.