Abstract: The present disclosure relates to a side sill for a vehicle, wherein the side sill is capable of absorbing an impact during lateral collision of the vehicle to maximally suppress the degree to which the side sill enters the interior, and protecting vehicle occupants and batteries. The side sill for a vehicle comprises: a side sill inner panel; a side sill outer panel coupled to the side sill inner panel; and a first cushioning member disposed between the side sill inner panel and the side sill outer panel and constituting a plurality of closed cross-sections arranged in the width direction of the side sill. The first cushioning member includes a main body formed by bending a single plate, and at least one partition member connecting both surfaces of the main body. A plurality of beads may be formed on the main body and the partition member.

Abstract: The present invention relates to a battery case which is made from a steel material, thereby providing a cross-section similar to that of an extruded material and having improved impact resistance properties, and at the same time, enabling the reduction of costs through the integration of components, the battery case comprising a case main body having a plate and a lateral frame enclosing the plate, wherein the lateral frame comprises a hollow part inside thereof, a reinforcement part which traverses the hollow part at a portion between side walls on both sides, or protrudes into the hollow part from at least one of the side walls, and a shock absorption part which is formed by the reinforcement part being bent or curved.

Abstract: An apparatus and method for manufacturing using a hydroforming process. The apparatus includes: upper and lower molds; first and second axial punches which are disposed on opposite sides of the steel substance so as to be movable towards each other and which have front surfaces configured so as to be insertable into each other; first and second pressurization cylinders which move the first and second axial punches towards each other and insert them into each other, thus forming a sealing space defined by the first and second axial punches and a pressurization space defined by the steel substance and the first and second axial punches; and a control unit which, through an oil-pressure passage formed in at least one of the first and second axial punches, supplies fluid into the pressurization space to pressurize the steel substance, thus forming the large caliber product.