CN-121989656-A - Vehicle lower structure

Abstract

The present disclosure provides a vehicle lower structure. The vehicle lower structure includes a pair of rocker portions (40) that extend in the vehicle longitudinal direction and are separated in the vehicle width direction, a battery case (32) that has a coupling portion (100) that is coupled to the rocker portions (40) and that is disposed between the pair of rocker portions (40) and that houses the single cells, a lower panel (50) that covers the battery case (32) and the pair of rocker portions (40) from the vehicle lower side, and a housing portion (60) that is disposed between the battery case (32) and the rocker portions (40) and that is disposed on the vehicle width direction inner side than the coupling portion (100) and that is located above the lower panel (50), and that houses a high-voltage cable (62) that extends in the vehicle longitudinal direction in the housing portion (60).

Inventors

• MOTOI DAISUKE

Assignees

• 丰田自动车株式会社

Dates

Publication Date

20260508

Application Date

20251030

Priority Date

20241107

Claims (12)

1. 1. A vehicle lower structure having: A pair of rocker portions that extend in a vehicle front-rear direction and are separated in a vehicle width direction; a battery case having a coupling portion coupled to the rocker portions, disposed between a pair of the rocker portions, and accommodating a single cell; a lower panel that covers the battery case and the pair of rocker portions from a vehicle lower side; A receiving portion provided between the battery case and the rocker portion, at an upper side of the lower panel, and at an inner side in a vehicle width direction than the coupling portion, The storage portion stores therein a storage object extending in the vehicle front-rear direction.
2. 2. The vehicle lower structure according to claim 1, wherein, The lower panel is coupled to the rocker portion.
3. 3. The vehicle lower structure according to claim 2, wherein, The rocker portion has a closed cross-section portion that is a hollow member having a cross-section that is obtained by cutting a surface orthogonal to the vehicle longitudinal direction and is a closed cross-section, and a flange portion that is a plate-like member provided on the lower side of the closed cross-section portion, The lower panel is coupled to the flange portion.
4. 4. The vehicle lower structure according to claim 3, wherein, The flange portion has a longitudinal wall portion extending in a vehicle up-down direction and a lateral wall portion extending in a vehicle width direction from the longitudinal wall portion, The lower panel is coupled to the transverse wall portion.
5. 5. The vehicle lower structure according to claim 1, wherein, The rocker portion has a rocker inner and a rocker outer that is provided on the outer side in the vehicle width direction than the rocker inner, The lower end portion of the rocker outer is disposed on the vehicle lower side than the lower end portion of the rocker inner, The receiving portion is provided at a vehicle lower side of the rocker inner and at an inner side of the rocker outer in a vehicle width direction, The end of the lower panel is coupled to the lower portion of the rocker outer.
6. 6. The vehicle lower structure according to claim 5, wherein, The bending stiffness of the rocker inner member is higher than the bending stiffness of the rocker outer member.
7. 7. The vehicle lower structure according to claim 5, wherein, The joint portion of the battery case is provided at an inner side in the vehicle width direction than the rocker outer.
8. 8. The vehicle lower structure according to claim 7, wherein, Has a coupling member coupling the battery case with the rocker inner, The coupling member inserts through a through hole formed in the lower panel from a vehicle lower side, The diameter of the through hole is larger than the diameter of the coupling member.
9. 9. The vehicle lower structure according to claim 8, wherein, Comprising a rocker molding which covers the lower panel from the outer side in the vehicle width direction, The coupling member also doubles as a mounting member for mounting the rocker molding to the lower panel.
10. 10. The vehicle lower structure according to claim 1, wherein, The container has a cable.
11. 11. The vehicle lower structure according to claim 1, wherein, The receiving portion is provided on the vehicle lower side on the vehicle width direction inner side than the coupling portion.
12. 12. The vehicle lower structure according to claim 1, wherein, The battery case has a storage space defining portion that defines a battery storage space in which the unit cells are stored, and a protruding portion that protrudes outward in the vehicle width direction from the storage space defining portion, The engaging portion is provided on the protruding portion.

Description

Vehicle lower structure Technical Field The present disclosure relates to a vehicle lower structure. Background Japanese patent application laid-open No. 2023-051652 discloses a vehicle in which a battery is mounted at a lower portion of the vehicle. In this vehicle, a bulge portion protruding upward is provided at the center of a case cover of the battery in the vehicle width direction, and a battery auxiliary device or the like is accommodated in the bulge portion. In addition, from the viewpoint of expanding the storage space in the lower part of the vehicle, a case where a storage space for a wire harness or the like is secured on the side of the battery case has been studied. In this case, it is desirable to protect the storage object from the rocker portion that moves inward in the vehicle width direction at the time of a side collision. Disclosure of Invention In view of the above-described facts, an object of the present disclosure is to obtain a vehicle lower structure capable of protecting a housed object in the event of a side collision in a vehicle in which a housing portion is provided at a side of a battery case. The vehicle lower structure according to the first aspect includes a pair of rocker portions that extend in a vehicle longitudinal direction and are separated in a vehicle width direction, a battery case that has a coupling portion that is coupled to the rocker portions and that is disposed between the pair of rocker portions and that houses a single cell, a lower panel that covers the battery case and the pair of rocker portions from a vehicle lower side, and a housing portion that is disposed between the battery case and the rocker portions and that is disposed on an inner side in the vehicle width direction than the coupling portion and that is located on an upper side of the lower panel, wherein a housed object that extends in the vehicle longitudinal direction is housed in the housing portion. In the vehicle lower portion structure according to the first aspect, the storage portion is provided between the battery case and the rocker portion. This can expand the storage space in the lower part of the vehicle. In the above configuration, the storage portion is provided further toward the vehicle width direction inner side than the joined portion of the rocker portion and the battery case. In the case where the collision body collides with the side portion of the vehicle (in other words, the outer portion in the vehicle width direction) and the collision load is input to the rocker portion (hereinafter, referred to as "side collision"). The rocker portion to which the load is input is pressed inward in the vehicle width direction, but movement inward in the vehicle width direction is suppressed at the joint portion. In this way, in the joint portion provided on the outer side in the vehicle width direction than the storage portion, movement of the rocker portion toward the inner side in the vehicle width direction is suppressed, so deformation of the storage portion can be suppressed. Therefore, the storage object stored in the storage section can be protected. In the above configuration, the lower panel covers the battery case and the rocker portion from the vehicle lower side, and the storage portion is provided between the battery case and the rocker portion. In this way, in the above-described structure, the vehicle-width-direction outer end portion of the lower panel is located further to the vehicle-width-direction outer side than the housing portion. In this way, in the event of a side collision, a collision load is input to the lower panel before being input to the storage portion. In this way, a part of the collision load is input to the lower panel. Therefore, the collision load at the time of the side collision is dispersed to the rocker portion and the lower panel, and the receiving portion becomes difficult to deform. Therefore, the storage object stored in the storage section can be protected. In the vehicle lower portion structure according to the second aspect, in the first aspect, the lower panel is coupled to the rocker portion. In the vehicle lower structure according to the second aspect, the lower panel is coupled to the lower portion of the rocker portion. In this way, even when a side collision occurs, movement of the rocker portion toward the vehicle width direction inner side is suppressed by the lower panel. Therefore, the rocker portion and the receiving portion are further less likely to interfere with each other. Therefore, the storage object stored in the storage portion can be more effectively protected while further suppressing deformation of the storage portion. In the vehicle lower portion structure according to the third aspect, in the second aspect, the rocker portion has a closed cross-section portion that is a hollow member having a cross-section obtained by cutting a surface orthogonal to the vehicle longitudinal direction as a closed cross-sec