This application provides a
battery pack mounting architecture, a vehicle body underbody structure
assembly, and a vehicle, belonging to the technical field of vehicle body underbody structure. By offsetting the
power battery pack, a larger
exhaust pipe mounting space is planned under the mounting frame. This allows for the installation and
layout of the
exhaust pipe without reducing the size of the
power battery pack, without affecting the capacity of the
power battery pack, thus avoiding any adverse
impact on the vehicle's
driving range. Because the first and second
exhaust pipe mounting positions are alternately arranged in the front-rear direction, they can effectively
resist horizontal forces from different directions, restricting the movement of the exhaust
pipe to a very
small range, thereby improving the rigidity and stability of the exhaust
pipe installation. Due to the formation of a grid-like frame structure, when a collision occurs, the
impact force is decomposed into multiple directions, effectively reducing the force borne at a
single point, and also generating extremely high
torsional rigidity, leaving sufficient survival space for passengers and preventing the
doors from jamming.