US Patent 10293861 Reinforcement unit of side sill for electric vehicles

A reinforcement unit of a side sill for an electric vehicle is disclosed. The side sill includes side sill inner panels and side sill outer panels that are respectively provided under opposite ends of a center floor panel. The reinforcement unit includes a reinforcement pipe member provided between the side sill inner panel and the side sill outer panel along a length direction of a vehicle body, and a connection apparatus comprising a plurality of fixing brackets and a plurality of pipe nuts. The connection apparatus fixes the reinforcement pipe member to the side sill inner panel.