Vehicle lower structure

A vehicle lower structure comprising:

• a battery pack mounted under a floor panel, the battery pack including plural battery stacks, a case, and an internal pack cross, the case accommodating the plural battery stacks and including a case cover as an upper member and a case tray as a lower member, and a plural plurality of the internal pack crosses extending in a vehicle width direction on an inner surface of a bottom plate of the case tray and being provided along a vehicle longitudinal direction;
• and
• an external pack cross as a frame member that is provided in the vehicle width direction on the outside of the battery pack, a plurality of the external pack crosses being provided along the vehicle longitudinal direction on an outer surface of the bottom plate of the case tray,
• wherein an internal pack cross front flange is provided at a front end in the vehicle longitudinal direction of the internal pack cross, and an internal pack cross rear flange is provided at a rear end of the internal pack cross in the vehicle longitudinal direction,
• wherein an external pack cross front flange is provided at a front end in the vehicle longitudinal direction of the external pack cross, and an external pack cross rear flange is provided at a rear end of the external pack cross in the vehicle longitudinal direction,
• wherein the internal pack cross front flange is fastened to the external pack cross rear flange that is arranged in front of the internal pack cross in the vehicle longitudinal direction in a state of matching the external pack cross rear flange in the vehicle longitudinal direction, and
• wherein the external pack cross front flange is fastened to the internal pack cross rear flange that is arranged in front of the external pack cross in the vehicle longitudinal direction in a state of matching the internal pack cross rear flange in the vehicle longitudinal direction.