CN-121990056-A - Threshold beam structure for electric vehicle

Abstract

A rocker beam structure for a vehicle includes a rocker inner panel connected to both sides of a floor structure in a vehicle width direction and arranged in a vehicle body front-rear direction, an upper reinforcement connected to an outer side surface of the rocker inner panel and arranged in the vehicle body front-rear direction, a lower reinforcement connected to a lower surface of the upper reinforcement and the outer side surface of the rocker inner panel and arranged in the vehicle body front-rear direction, and a rocker outer panel connected to an outer side surface of the rocker inner panel and the upper reinforcement and arranged in the vehicle body front-rear direction.

Inventors

• LU CHENGHAO
• Jiang Chengmen
• WU XIUMIN

Assignees

• 现代自动车株式会社
• 起亚株式会社

Dates

Publication Date

20260508

Application Date

20250925

Priority Date

20241104

Claims (15)

1. 1. A rocker beam structure for a vehicle, comprising: a rocker inner panel configured to be connected to both sides of the floor structure in the vehicle width direction and arranged in the vehicle body front-rear direction; An upper reinforcement connected to an outer side surface of the rocker inner panel and arranged in a vehicle body front-rear direction; A lower reinforcement connected to a lower surface of the upper reinforcement and an outer side surface of the rocker inner panel and arranged in a vehicle body front-rear direction, and A rocker outer panel connected to an outer side surface of the rocker inner panel and the upper reinforcement, and arranged in a vehicle body front-rear direction.
2. 2. The rocker structure according to claim 1, wherein a floor panel and a cross member in the floor structure are connected to an inner side surface of the rocker inner panel on both sides in a vehicle width direction, and Wherein the cross member and the upper reinforcement are arranged on a first imaginary line in the vehicle width direction.
3. 3. The rocker structure according to claim 2, wherein the rocker inner panel is connected to a side frame of a battery assembly mounted at a lower portion of the floor structure, and Wherein the side face of the upper reinforcement connected to the outer side face of the rocker inner panel and the side face of the side frame are arranged on a second imaginary line in the vertical direction.
4. 4. A rocker structure according to claim 3, wherein the section from the side face of the upper reinforcement and the side face of the side frame to the rocker outer panel is a transition section.
5. 5. The rocker structure of claim 1 wherein the upper reinforcement comprises an aluminum extrusion, and Wherein the aluminum extrusion includes a plurality of closed sections separated by at least one barrier rib.
6. 6. The rocker structure according to claim 1, wherein the lower reinforcement includes a plurality of unit modules that are connected in order in the vehicle body front-rear direction.
7. 7. The rocker structure according to claim 6, wherein the lower reinforcement is formed in a honeycomb shape in the vehicle body front-rear direction by the plurality of unit modules.
8. 8. The rocker structure of claim 6 wherein each cell assembly comprises: an upper unit body made of steel material and connected to the lower surface of the upper reinforcement, and And a lower unit body made of steel material, which is connected to a lower portion of the upper unit body and to an outer side surface of the rocker inner panel.
9. 9. The rocker structure according to claim 8, wherein the upper cell body has an M-shaped cross section.
10. 10. The rocker structure according to claim 9, wherein the lower cell body has a U-shaped cross section.
11. 11. The rocker structure according to claim 8, wherein the upper cell body includes: An upper molding part which is recessed from the top to the bottom; an upper connecting portion extending forward and backward from the upper molding portion and connected to a lower surface of the upper reinforcement, and Upper ribs extending downward from the upper connection portions, respectively.
12. 12. The rocker structure according to claim 11, wherein the lower cell body includes: a lower connecting portion connected to an outer side surface of the rocker inner panel in a vehicle body front-rear direction, and And a lower rib extending upward from both sides of the lower connection portion.
13. 13. The rocker structure according to claim 12, wherein the upper and lower ribs of each unit cell are connected by welding.
14. 14. The rocker structure according to claim 13, wherein the upper rib portion and the lower rib portion of the unit modules adjacent to each other in the vehicle body front-rear direction are connected by welding.
15. 15. The rocker structure according to claim 8, wherein a weld nut penetrating the rocker inner panel and the lower unit body in a vertical direction is connected to the rocker inner panel.

Description

Threshold beam structure for electric vehicle Cross application of related applications The present application claims priority and benefit from korean patent application No. 10-2024-0154059 filed on the 11 th month 4 of 2024 to korean intellectual property office, the entire contents of which are incorporated herein by reference. Technical Field The invention relates to a rocker beam (side sill) structure for an electric vehicle. Background In recent years, the use of electric vehicles driven by electric power sources is increasing due to environmental regulations and fuel efficiency regulations. An electric vehicle is equipped with a battery assembly that powers an electric drive train. In one example, the battery assembly is mounted to a lower portion of an electric vehicle body floor structure. For electric vehicles, the primary factor affecting the range (or distance travelled) is the battery volume ratio of the battery assembly. The more battery cells that can be installed in the limited space of the battery assembly, the longer the range of the electric vehicle. Components having overlapping mechanical strength between the vehicle body and the battery assembly (e.g., side components of the battery assembly that are connected to the vehicle body) and battery mounting components of the battery assembly may cause a reduction in the battery volume ratio. On the other hand, with the increasing demand for electric vehicles in recent years, it is required to develop a vehicle body capable of meeting the requirements for collision performance. In particular, it is necessary to develop a vehicle body capable of protecting a battery assembly in the event of a side collision of an electric vehicle. The information contained in this background section is intended to facilitate an understanding of the background of the invention and may include what is not already disclosed, available, or in use in the traditional art. Disclosure of Invention The present invention relates to a vehicle body structure for an electric vehicle, and more particularly, to a rocker beam structure for an electric vehicle having improved side collision performance. Embodiments of the present invention may provide a rocker beam structure for an electric vehicle capable of minimizing rotation of the rocker beam and reducing collision energy transmitted to a battery assembly at the time of a side collision of the electric vehicle. The rocker structure for an electric vehicle according to an embodiment of the present invention may include a rocker inner panel connected to both sides of a floor structure in a vehicle width direction and arranged in a vehicle body front-rear direction, an upper reinforcement connected to an outer side surface of the rocker inner panel and arranged in the vehicle body front-rear direction, a lower reinforcement connected to a lower surface of the upper reinforcement and an outer side surface of the rocker inner panel and arranged in the vehicle body front-rear direction, and a rocker outer panel connected to an outer side surface of the rocker inner panel and the upper reinforcement and arranged in the vehicle body front-rear direction. The floor panel and the cross member provided in the floor structure may be connected to the inner side surface of the rocker inner panel on both sides in the vehicle width direction. The cross member and the upper reinforcement may be located on a first imaginary line in the vehicle width direction. The rocker inner panel may be connected to side frames installed at both sides of the battery assembly at the lower portion of the floor structure. The side surface of the upper reinforcement connected to the outer side surface of the rocker inner panel and the side surface of the side frame may be arranged on a second imaginary line in the vertical direction. The section from the side face of the upper reinforcement and the side face of the side frame to the rocker outer panel may be provided as a transition section. The upper stiffener may comprise an aluminum extrusion. The aluminum extrusion may include a plurality of closed sections separated by at least one barrier rib. The lower reinforcement may include a plurality of unit components connected in sequence in the front-rear direction of the vehicle body. The lower reinforcement may be formed in a honeycomb shape in the vehicle body front-rear direction by a plurality of unit modules. The unit assembly may include an upper unit body made of steel material connected to a lower surface of the upper reinforcement, and a lower unit body made of steel material connected to a lower portion of the upper unit body and to an outer side surface of the rocker inner panel. The cross section of the upper unit body may be M-shaped. The cross section of the lower unit body may be U-shaped. The upper unit body may include an upper molding part formed to be recessed from the top toward the bottom, an upper connection part extending forward and