US Patent 11767061 Side sill assembly of vehicle with reinforced stiffness

A side sill assembly of the vehicle includes a side sill inner, a side sill outer, and a reinforcement unit provided between the side sill inner and the side sill outer, wherein the reinforcement unit may include a plurality of cell members having an upper member and a lower member bonded to each other vertically at intervals therebetween, and disposed in a longitudinal direction of the vehicle at intervals from each other therebetween; and a connector bonded to rear and front end portions of different cell members among the plurality of cell members to connect the plurality of cell members to each other in the longitudinal direction of the vehicle.