An embodiment vehicle body includes a rear cross member unit disposed in a vehicle width direction and coupled to front portions of a pair of rear side members disposed at a rear portion of the vehicle body, a pair of side seal units respectively coupled to end portions of the rear cross member unit in a vehicle length direction, a front cross member unit coupled to front portions of the pair of side seal units in the vehicle width direction, an upper cross member unit coupled to upper portions of the pair of side seal units in the vehicle width direction, and a rear floor panel assembly connected to the rear cross member unit, the pair of side seal units, the front cross member unit, and the upper cross member unit.

A floor structure of a rear vehicle body, in which at least one component including a high-voltage battery is mounted in a rear portion of a vehicle body, includes: a first cross member coupled to each front portion of first and second rear side members in a vehicle width direction; and a second cross member coupled to the first and second rear side members at a rear of the corresponding first cross member in the vehicle width direction, wherein a space in which the at least one component is mounted is formed between the first cross member and the second cross member.

A vehicle underbody structure includes a pair of rockers that are provided on both vehicle width direction sides of a vehicle underbody and extend in a vehicle front-rear direction, a battery that is disposed centrally in a vehicle width direction center between the pair of rockers and is disposed above a vehicle floor and on the lower side of a seat, a fuel tank that is disposed in the vehicle width direction center between the pair of rockers and is disposed under the vehicle floor and further toward a rear side of the vehicle than the battery, and a waste pipe that is coupled to a drive unit provided at a vehicle front side of the battery and extends in the vehicle front-rear direction between the battery and one of the rockers.

A vehicle of an embodiment includes a driving device including a rotating electric machine, a case configured to accommodate the rotating electric machine and a PCU that is disposed on a side opposite to a side at which a load is input when the vehicle collides with an object, that is disposed in front of the case and that is configured to supply electric power to the rotating electric machine, a support section that is provided in the driving device and that is configured to come in contact with a vehicle body frame of the vehicle, and an impact attenuating section that is provided on the support section and that is configured to attenuate an impact when the vehicle collides with an object.

A battery rear undercover assembly for an eco-friendly vehicle enables the bottom of a vehicle to be flattened while covering a lower portion of the rear of a high-voltage battery in an eco-friendly vehicle. The battery rear undercover assembly includes a body having a front end that can be fastened to a lower portion of a rear end of a high-voltage battery and a battery rear undercover formed to extend from each of both side ends of the body upward and formed with a side cover that can be fastened to a vehicle body of a vehicle. The battery rear undercover assembly includes a reinforcement member formed in a longitudinal direction of the vehicle and fastened to an upper surface of the battery rear undercover.

A vehicle rear portion structure includes a cross member that extends in a vehicle width direction at a vehicle rear, a rear wheel house that accommodates a rear tire, a rear pillar that extends in a vehicle vertical direction, a reinforcing member that connects the rear pillar with the rear wheel house, and a joining member that connects a lower end portion of the reinforcing member with one end portion of the cross member. The rear pillar is divided into a general portion and a high-rigidity portion. The high-rigidity portion is connected to an upper end portion of the general portion and is specified with a higher rigidity than the general portion. The reinforcing member is connected to the high-rigidity portion.

An electric vehicle may include a body; a low-voltage component disposed in a rear portion of the body; and at least one coupling member securing the low-voltage component to a plurality of securing portions of the body. The plurality of securing portions may include at least one first securing portion located forward of the low-voltage component in a vehicle front-rear direction and at least one second securing portion located rearward of the low-voltage component in the vehicle front-rear direction. A center of the at least one first securing portion and a center of the at least one second securing portion are located at different positions from each other in a vehicle vertical direction.

A vehicle rear structure includes side reinforcing members and a support member. The side reinforcing members reinforce rear damper housings. The support member includes an upper rod member, a lower rod member, and a posture maintaining member. The upper rod member lies across the side reinforcing members. The lower rod member is disposed below the upper rod member. The posture maintaining member is disposed between the upper rod member and the lower rod member and is joined to the upper rod member and the lower rod member at a plurality of places in a vehicle width direction.

The rear frame includes an inclined part that is inclined inward in, a vehicle width direction in going rearward and a horizontal part that extends rearward from a rear end of the inclined part. A rear part of the side sill includes a first enlarged width portion that increases in width inwardly in the vehicle width direction via a bent portion. A front part of the rear frame inclined part includes a second enlarged width portion that increases in width outwardly in the vehicle width direction. A rear end of the first enlarged width portion and a front end of the second enlarged width portion are connected. An inner wall in the vehicle width direction of the first enlarged width portion and an inner wall in the vehicle width direction of the inclined part are linearly continuous in plan view.

This vehicle rear structure includes a rear floor pan, rear side frames each provided on an outer side of the rear floor pan in a vehicle width direction, and a cross portion configured to connect the rear side frames provided on both sides in the vehicle width direction, and the cross portion has a cross ridge portion provided in front of the rear floor pan and extending in the vehicle width direction, and an extension member having a first end portion connected to the cross ridge portion and a second end portion disposed at a side opposite to the first end portion in the vehicle width direction and connected to the rear side frames.