Vehicle side part structure

Abstract

To provide a vehicle side part structure capable of protecting a vehicle cabin by suppressing fall-down to the inside of a pillar in a vehicle width direction at the time of side collision of a vehicle.SOLUTION: A vehicle side part structure includes: a pillar 32 extending to a vehicle vertical direction at a vehicle side part 10; a rocker 34 structured while extending in the vehicle longitudinal direction at the lower part of the pillar 32 and also connected to the pillar 32, and including a body part 56 and an extending part 58 extending to the inside in a vehicle width direction from the upper part of the body part 56; and a skeleton member 28 disposed on the inside in the vehicle width direction of the body part 56 and on the vehicle lower side of the extending part 58.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a vehicle side structure. [Background technology]

[0002] The following Patent Document 1 discloses a vehicle floor structure in which a battery frame is connected to a floor member arranged on the underside of a floor case, a battery is mounted on the battery frame, and the battery is stored between the floor case and the battery frame.

[0003] In this technology, a side sill (rocker) is disposed on the outside of a side member that extends in the vehicle longitudinal direction on a floor member. A pillar is erected on the side sill (rocker). The side member and a portion of the side sill (rocker) near the pillar joint are connected in the vehicle width direction by outriggers. The outriggers are designed to smoothly collapse and deform when the pillar collapses inward in the vehicle width direction in order to absorb collision energy during a side collision of the vehicle. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 07-117726 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the above technology leaves room for improvement in terms of protecting the vehicle interior by preventing the pillar from collapsing inward in the vehicle width direction during a side collision of the vehicle.

[0006] In consideration of the above, the present invention aims to provide a vehicle side structure that can protect the vehicle interior by suppressing the pillar from collapsing inward in the vehicle width direction during a side collision of the vehicle. [Means for solving the problem]

[0007] The vehicle side structure of the first aspect has a pillar extending in the vertical direction of the vehicle on the side of the vehicle, a rocker extending in the longitudinal direction of the vehicle below the pillar and connected to the pillar, the rocker including a main body and an extension extending from an upper part of the main body to the inside in the vehicle width direction, and a skeletal member arranged on the inside in the vehicle width direction of the main body and on the vehicle below the extension.

[0008] According to the vehicle side structure of the first aspect, in the event of a side collision of the vehicle (hereinafter referred to as "side collision"), a load is input to the pillar at the vehicle upper side of the rocker. At this time, a moment is generated in the rocker connected to the pillar in a direction that causes the rocker to collapse inward in the vehicle width direction, with the vehicle's fore-and-aft direction as its axial direction. Here, a framework member is disposed on the vehicle lower side of the extension portion of the rocker. Therefore, the extension portion receives an upward reaction force from the framework member, thereby suppressing the rocker from collapsing inward in the vehicle width direction.

[0009] The rocker has a main body and an extension, and is positioned so that it is applied from the vehicle upper side of the frame member to the outer side in the vehicle width direction. This positioning positions the rotation axis of the moment generated in the rocker during a vehicle side collision lower on the vehicle side compared to when the rocker is positioned only on the vehicle upper side of the frame member. This causes the load input from the rocker to the frame member to be input diagonally downward (toward the vehicle lower side and inward in the vehicle width direction). This makes it easier for a moment with its axial direction in the vehicle's fore-and-aft direction to be generated in the frame member as well. Therefore, the torsional rigidity of the frame member can be utilized to prevent the rocker from tipping inward in the vehicle width direction.

[0010] The vehicle side structure of the second aspect is the first aspect, wherein the skeletal member is a battery side frame, and the extension portion extends further inward in the vehicle width direction than the center of the battery side frame in the vehicle width direction.

[0011] According to the vehicle side structure of the second aspect, the extension portion extends farther inward in the vehicle width direction than the vehicle width center of the battery side frame, thereby efficiently transmitting a load from the extension portion to the battery side frame. Furthermore, when the pillar collapses during a vehicle side collision and the rocker rotates about the vehicle's fore-and-aft direction, a load is input obliquely downward from the extension portion to the battery side frame. At this time, because the extension portion extends farther inward in the vehicle width direction than the vehicle width center of the battery side frame, a moment is generated in the battery side frame in a direction that causes the battery side frame to collapse inward in the vehicle width direction. The entire portion of the battery side frame that is outward in the vehicle width direction from the vehicle width center is located below the extension portion. Therefore, when the battery side frame attempts to rotate in a direction that causes the battery side frame to collapse inward in the vehicle width direction, the extension portion of the rocker is pushed upward in the vehicle by the portion of the battery side frame that is outward in the vehicle width direction than the vehicle width center. This suppresses the rotation of the rocker, further suppressing the pillar from collapsing.

[0012] The vehicle side structure according to a third aspect is the first aspect, wherein the main body and the extension form a closed cross-sectional structure.

[0013] According to the vehicle side structure of the third aspect, a wide area including the extension portion has a closed cross-sectional structure, and therefore the rigidity of the rocker can be improved compared to when a flat extension portion extends from the main body portion toward the inside in the vehicle width direction.

[0014] A vehicle side structure according to a fourth aspect is the second aspect, wherein the battery side frame is fixed to a vehicle lower side of the extension portion.

[0015] According to the vehicle side structure of the fourth aspect, the load transmitted from the pillar to the rocker during a vehicle side collision is transmitted from the surface of the extension portion on the vehicle lower side to the battery side frame. In other words, the extension portion receives a reaction force from the surface of the battery side frame. This further suppresses the collapse of the rocker and the pillar.

[0016] The vehicle side structure according to a fifth aspect is the second aspect, wherein the battery side frame is fixed to the inner side of the main body in the vehicle width direction.

[0017] According to the vehicle side structure of the fifth aspect, when the pillar collapses during a vehicle side collision, the rocker rotates and attempts to collapse inward in the vehicle width direction, and the main body attempts to move (rotate) outward in the vehicle width direction, i.e., away from the battery side frame. At this time, because the main body is fixed to the battery side frame located on the inner side in the vehicle width direction, it is pulled inward in the vehicle width direction from the battery side frame. This further suppresses the rotation of the rocker. Therefore, the pillar collapse can be further suppressed.

[0018] A vehicle side structure according to a sixth aspect is the second aspect, wherein the battery side frame is fixed to a battery case that is disposed under the vehicle and that houses a battery.

[0019] According to the vehicle side structure of the sixth aspect, the battery side frame is fixed to the battery case, which has high rigidity to accommodate the battery, and therefore receives a reaction force from the battery case during a vehicle side collision. This increases the reaction force that the extension receives from the battery side frame. This further suppresses rotation of the rocker and further suppresses collapse of the pillar.

[0020] The vehicle side structure of the seventh aspect is the sixth aspect, wherein the battery case has a flange portion extending in the vehicle width direction, and is fixed to the vehicle lower side of the battery side frame at the flange portion.

[0021] According to the vehicle side section structure of the seventh aspect, the battery case is fixed to the vehicle lower side of the battery side frame at the flange portion, so that the battery can be mounted up to the vicinity of the inner side of the battery side frame in the vehicle width direction, thereby increasing the battery capacity.

[0022] The vehicle side structure of the eighth aspect is the seventh aspect, in which the extension portion, the battery side frame, and the flange portion are fastened together by a first fastener that penetrates the battery side frame in the vertical direction of the vehicle.

[0023] According to the vehicle side section structure of the eighth aspect, when a moment is generated in the rocker due to the pillar collapsing during a vehicle side collision, a load is applied to the upper part of the first fastener connecting the extension portion and the battery side frame in a direction toward the inside of the vehicle width direction. At this time, the lower part of the first fastener connecting the battery side frame and the flange portion attempts to move toward the outside of the vehicle width direction. In this way, the first fastener penetrates the battery side frame and fastens the extension portion, battery side frame, and flange portion together, so that the load is efficiently transmitted from the rocker to the battery side frame and flange portion. Furthermore, the rotation of the first fastener as described above generates a large moment in the battery side frame. Therefore, the torsional rigidity of the battery side frame can be further utilized to suppress the rocker from collapsing, and the pillar from collapsing can be further suppressed.

[0024] The vehicle side structure of the ninth aspect is the eighth aspect, in which the inner wall portion located on the inner side of the vehicle width direction of the main body portion is fastened in the vehicle width direction to the outer wall portion located on the outer side of the vehicle width direction of the battery side frame by a second fastener.

[0025] According to the vehicle side section structure of the ninth aspect, the inner wall portion of the main body located on the inner side in the vehicle width direction is fastened in the vehicle width direction by the second fasteners to the outer wall portion of the battery side frame located on the outer side in the vehicle width direction by the second fasteners, so that when the main body attempts to collapse toward the inner side in the vehicle width direction during a side collision, the force that causes the main body to move away from the battery side frame can be quickly transmitted from the fastening point of the second fastener to the fastening point of the first fastener and can be received as a shear load at the fastening point of the first fastener, thereby effectively suppressing rotation of the main body and, ultimately, collapse of the pillar.

[0026] The vehicle side structure according to a tenth aspect is the ninth aspect, wherein the first fasteners and the second fasteners are arranged alternately and at equal intervals from the front side of the vehicle.

[0027] According to the vehicle side structure of the tenth aspect, the first fasteners fastened in the vehicle vertical direction and the second fasteners fastened in the vehicle width direction are alternately and equally spaced in the vehicle longitudinal direction, thereby preventing the load from being transmitted unevenly to one area. Therefore, the bending rigidity and torsional rigidity of the battery side frame can be utilized to efficiently prevent the rocker from tipping over. However, the term "equally spaced" here means that a deviation of approximately one bolt is allowed.

[0028] The vehicle side structure of the 11th aspect is the 9th aspect, in which the lower wall portion located on the vehicle lower side of the battery side frame is fastened to the flange portion by third fasteners arranged at equal intervals between the first fasteners and the second fasteners.

[0029] According to the vehicle side section structure of the eleventh aspect, the lower wall portion of the battery side frame located on the vehicle lower side is fastened to the flange portion of the battery case by third fasteners arranged at equal intervals, separate from the first fasteners. This allows the battery case to be more stably supported by the battery side frame and allows the battery side frame to receive an even greater reaction force from the battery case in a side collision. This further reduces the collapse of the rocker.

[0030] The vehicle side structure according to the twelfth aspect is an invention described in the fourth or fifth aspect, in which the battery side frame is fixed to the rocker at a position corresponding to the pillar in the fore-and-aft direction of the vehicle.

[0031] According to the vehicle side structure of the twelfth aspect, the extension portion of the rocker is fixed to the battery side frame at a position where the pillar will collapse in the event of a vehicle side collision. This allows the extension portion to obtain a reaction force from the battery side frame more effectively. Therefore, the collapse of the pillar can be further suppressed. Note that the "position corresponding to the pillar" here means "a position that overlaps with the pillar in the fore-and-aft direction of the vehicle."

[0032] The vehicle side structure of the thirteenth aspect is the sixth aspect, and further includes a floor cross member extending in the vehicle width direction on the vehicle upper side of the battery case, and the floor cross member is positioned in a position overlapping at least a portion of the extension portion when viewed from the vehicle side.

[0033] According to the vehicle side structure of the thirteenth aspect, when the rocker attempts to move inward in the vehicle width direction during a vehicle side collision, the rocker receives a reaction force from the floor cross member disposed in a position overlapping at least a portion of the extension portion as viewed from the side of the vehicle. This suppresses the rocker from moving inward in the vehicle width direction. This further protects the passenger compartment.

[0034] A vehicle side structure according to a fourteenth aspect is the thirteenth aspect, wherein the floor cross member is fixed to the extension portion.

[0035] According to the vehicle side structure of the fourteenth aspect, the load transmitted from the rocker during a vehicle side collision is input directly to the floor cross member via the extension. Therefore, the rocker can receive a large reaction force from the floor cross member extending in the vehicle width direction toward the outside in the vehicle width direction. As a result, the collapse of the pillar is further suppressed.

[0036] A vehicle side structure according to a fifteenth aspect is the tenth aspect, wherein the floor cross member is disposed at a position corresponding to the pillar in the vehicle front-rear direction.

[0037] According to the vehicle side structure of the fifteenth aspect, the rocker can obtain a large reaction force from the floor cross member at the position where the pillar collapses during a side collision of the vehicle. This further suppresses the collapse of the pillar. Note that the "position corresponding to the pillar" here means "a position that overlaps with the pillar in the fore-and-aft direction of the vehicle."

[0038] The vehicle side structure of the 16th aspect, in the 10th aspect, further has a bracket connecting the vehicle width inner surface of the pillar, the vehicle upper surface of the vehicle width end of the floor cross member, and the vehicle upper surface of the battery case.

[0039] According to the vehicle side structure of the sixteenth aspect, the vehicle width direction inner surface of the pillar receives reaction forces from the vehicle upper surface of the vehicle width direction end of the floor cross member and the vehicle upper surface of the battery case via the bracket. Therefore, the pillar is more effectively prevented from collapsing. Note that the "end" of the floor cross member here refers to a portion having a predetermined length in the vehicle width direction, including the end point. [Effects of the Invention]

[0040] As described above, the vehicle side structure according to the present invention has the excellent effect of being able to protect the vehicle interior by suppressing the pillar from collapsing inward in the vehicle width direction during a side collision of the vehicle. [Brief explanation of the drawings]

[0041] [Figure 1] FIG. 2 is an exploded perspective view of a battery frame and a battery case of the vehicle side structure according to the present embodiment. [Figure 2] 1 is a schematic cross-sectional view of a vertical section of a vehicle side structure according to an embodiment of the present invention, viewed from the left side of the vehicle. [Figure 3] FIG. 3 is a cross-sectional view of the vicinity of the co-fastening bolt of FIG. 2. [Figure 4] FIG. 3 is a cross-sectional view of the periphery of the horizontal bolt in FIG. 2. [Figure 5] FIG. 3 is a cross-sectional view of the periphery of the case retaining bolt in FIG. 2. [Figure 6] FIG. 2 is an enlarged perspective view showing the periphery of a bracket of the vehicle side structure according to the present embodiment. [Figure 7] FIG. 10 is an exploded perspective view of a battery frame and a battery case of a vehicle side structure according to a modified example.

[0042] A vehicle side structure according to one embodiment of the present invention will be described below with reference to Figures 1 to 6. Note that the arrows FR, UP, and LH shown as appropriate in each figure indicate the front side, upper side, and left side in the left-right direction (width direction) of the vehicle, respectively. Furthermore, when the terms "front-rear," "up-down," and "left-right" are used in the following description unless otherwise specified, they refer to front-rear in the front-rear direction of the vehicle, up-down in the up-down direction of the vehicle, and left-right in the left-right direction (width direction), respectively.

[0043] 1 shows the left side of a battery frame 14 and a battery case 16 of a vehicle 12 that employs a vehicle side structure according to this embodiment. The vehicle 12 is an electric vehicle powered by a motor (not shown) that operates using power supplied from a battery 18 (see FIG. 3) housed in the battery case 16, and is provided with the battery frame 14 and the battery case 16 at its bottom.

[0044] (Battery case 16) The battery case 16 includes an upper case 20 disposed on the upper side of the vehicle and a lower case 22 disposed on the lower side of the vehicle, and houses a battery 18 (see FIG. 3) between the upper case 20 and the lower case 22. The upper case 20 also serves as a floor panel.

[0045] The upper case 20 is formed in a box shape that is generally rectangular in plan view and open toward the vehicle lower side. The lower case 22 is formed in a box shape that is generally rectangular in plan view and open toward the vehicle upper side. An upper flange portion 24 extending outward in a generally horizontal direction is formed at the lower end of the upper case 20. Similarly, a lower flange portion 26 extending outward in a generally horizontal direction is formed at the upper end of the lower case 22. As a result, the upper case 20 and the lower case 22 are each formed in a generally flat hat shape in a longitudinal cross section viewed from the vehicle front-rear direction and in a longitudinal cross section viewed from the vehicle width direction. The upper flange portion 24 and the lower flange portion 26 are overlapped and joined in the vehicle up-down direction.

[0046] (Battery Frame 14) The battery frame 14 is formed in a substantially rectangular frame shape in a plan view and is disposed above the upper flange portion 24 of the battery case 16. The battery frame 14 includes a pair of left and right battery side frames 28 extending in the longitudinal direction of the vehicle, and a pair of front and rear battery cross frames 30 connecting the front ends and rear ends of the pair of left and right battery side frames 28, respectively. The pair of left and right battery side frames 28 and the pair of front and rear battery cross frames 30 are each formed in a hollow rectangular tube shape. Note that the battery frame may be solid. Also, the right battery side frame is not shown in FIG. 1. Because the right battery side frame is bilaterally symmetrical to the left battery side frame 28, the following description will focus on the left battery side frame 28, and the description of the right battery side frame will be omitted.

[0047] (Center pillar 32) 2 shows a vertical cross-sectional view of the approximate center in the vehicle longitudinal direction of the vehicle left side 10. As shown in Fig. 2, a center pillar 32 as a pillar extending in the vehicle vertical direction is disposed in the approximate center in the vehicle longitudinal direction of the vehicle left side 10. In addition, a rocker 34 extending in the vehicle longitudinal direction is disposed in the lower part of the vehicle left side 10. The lower end of the center pillar 32 is joined to the rocker 34.

[0048] (Rocca 34) As shown in FIG. 3, the rocker 34 includes an outer panel 36 disposed on the outer side in the vehicle width direction, and an inner panel 38 disposed on the inner side in the vehicle width direction.

[0049] The outer panel 36 includes an outer wall portion 40 that extends in the vehicle up-down direction and forms the outer surface of the rocker 34 in the vehicle width direction, an outer upper wall portion 42 that extends inward in the vehicle width direction from the upper end of the outer wall portion 40, and an outer lower wall portion 44 that extends inward in the vehicle width direction from the lower end of the outer wall portion 40. A flange portion 42A that bends toward the upper side of the vehicle is formed at the inner end of the outer upper wall portion 42 in the vehicle width direction. Furthermore, a flange portion 44A that bends toward the lower side of the vehicle is formed at the inner end of the outer lower wall portion 44 in the vehicle width direction.

[0050] The inner panel 38 is composed of an upper inner wall portion 46 that extends in the vertical direction of the vehicle at the upper side of the vehicle and forms the inner surface of the rocker 34 in the vehicle width direction, and a lower inner wall portion 48 that serves as an inner wall portion that extends in the vertical direction of the vehicle on the outer side of the upper inner wall portion 46 in the vehicle width direction.

[0051] The inner panel 38 also includes an intermediate wall portion 50 that connects the lower end of the upper inner wall portion 46 and the upper end of the lower inner wall portion 48 in the vehicle width direction. The inner panel 38 also includes an inner upper wall portion 52 that extends outward in the vehicle width direction from the upper end of the upper inner wall portion 46, and an inner lower wall portion 54 that extends outward in the vehicle width direction from the lower end of the lower inner wall portion 48.

[0052] A flange portion 52A that bends toward the upper side of the vehicle is formed at the outer end of the inner upper wall portion 52 in the vehicle width direction. The flange portion 52A of the inner upper wall portion 52 is welded to the flange portion 42A of the outer upper wall portion 42. Furthermore, a flange portion 54A that bends toward the lower side of the vehicle is formed at the outer end of the inner lower wall portion 54 in the vehicle width direction. The flange portion 54A of the inner lower wall portion 54 is welded to the flange portion 44A of the outer lower wall portion 44. This gives the rocker 34 a closed cross-sectional structure.

[0053] Here, the rocker 34 includes a main body 56 including the outer panel 36 and the lower inner wall 48 of the inner panel 38, and an extension 58 including the inner upper wall 52, upper inner wall 46, and middle wall 50 of the inner panel 38. In other words, the rocker 34 includes the main body 56 extending in the up-down direction of the vehicle, and the extension 58 extending inward in the vehicle width direction from an upper portion of the main body 56. The main body 56 and the extension 58 form a closed cross-sectional structure for the rocker 34.

[0054] The battery side frame 28 is disposed on the inner side of the main body 56 in the vehicle width direction and on the vehicle lower side of the extension portion 58 with respect to the rocker 34. In other words, the rocker 34 is disposed so as to extend from the upper side of the battery side frame 28 to the outer side in the vehicle width direction. The battery side frame 28 is fixed to the vehicle lower side of the extension portion 58. The battery side frame 28 is also fixed to the inner side of the main body 56 in the vehicle width direction.

[0055] The battery side frames 28 are configured so that their bending rigidity is higher than that of the rockers 34. Furthermore, the battery side frames 28 are configured so that their torsional rigidity is higher than that of the rockers 34. However, the bending rigidity referred to here refers to bending rigidity against an external force directed downwardly from the vehicle. The upper inner wall portion 46 of the rocker 34 is formed flush with an inner wall portion 60 of the battery side frames 28 that is located on the inner side in the vehicle width direction.

[0056] (Co-fastening bolt 62) As shown in FIG. 3, the upper flange portion 24 and lower flange portion 26 of the battery case 16, the battery side frame 28, and the intermediate wall portion 50 at the extension portion 58 of the rocker 34 are fastened together by a fastening bolt 62 as a first fastener.

[0057] As shown in FIG. 1, four co-fastening bolts 62 are arranged at equal intervals in the front-rear direction of the vehicle, for example.

[0058] 3, the co-fastening bolt 62 is inserted through the through-hole 26A of the lower flange portion 26 and the through-hole 24A of the upper flange portion 24. The co-fastening bolt 62 is also inserted through a through-hole 64A of a lower wall portion 64 located on the vehicle lower side of the battery side frame 28 and a through-hole 66A of an upper wall portion 66 located on the vehicle upper side of the battery side frame 28, thereby penetrating the battery side frame 28 in the vehicle up-down direction. The co-fastening bolt 62 is also inserted through a through-hole 50A formed in the intermediate wall portion 50 of the extension portion 58 of the rocker 34.

[0059] A weld nut 68 is welded to the periphery of the through hole 50A in the intermediate wall portion 50 of the extension portion 58 of the rocker 34. The co-fastening bolt 62 is inserted from the lower side of the lower flange portion 26 through the through hole 26A, the through hole 24A, the through hole 66A, and the through hole 50A, and is screwed into the weld nut 68.

[0060] (Horizontal bolt 70) As shown in FIG. 4 , an outer wall portion 72 located on the outer side of the battery side frame 28 in the vehicle width direction is fastened to the lower inner wall portion 48 of the main body 56 of the rocker 34 by a horizontal bolt 70 serving as a second fastener. Specifically, a through hole 72A is formed in the outer wall portion 72 of the battery side frame 28. A through hole 48A is formed in the lower inner wall portion 48 of the main body 56 of the rocker 34 at a position corresponding to the through hole 72A in the battery side frame 28. A blind nut 73 is provided around the periphery of the through hole 72A in the outer wall portion 72 of the battery side frame 28. The horizontal bolt 70 is threadedly engaged with the blind nut 73, which is inserted through the through hole 48A and the through hole 72A from the outer side of the lower inner wall portion 48 in the vehicle width direction.

[0061] As shown in FIG. 1, five through holes 72A are formed in the outer wall portion 72 of the battery side frame 28. That is, five horizontal bolts 70 (see FIG. 4) are arranged at equal intervals in the fore-and-aft direction of the vehicle. The above-mentioned co-fastening bolts 62 are arranged one between each horizontal bolt 70. In other words, the horizontal bolts 70 and the co-fastening bolts 62 are arranged alternately at equal intervals from the front side of the vehicle. Note that the number and arrangement of the co-fastening bolts and horizontal bolts are not limited to those described above.

[0062] As shown in Figure 2, of the five horizontal bolts 70, the horizontal bolt 70 located in the center of the vehicle's fore-and-aft direction (the third from the front of the vehicle) is positioned at a position corresponding to the center of the center pillar 32 in the vehicle's fore-and-aft direction.

[0063] (Case retaining bolt 74) 1, 2, and 5, the battery case 16 is fastened to and held in place by case retention bolts 74, which serve as a plurality of third fasteners, in addition to the co-fastening bolts 62. As shown in FIGS. 1 and 2, the case retention bolts 74 are each disposed between the co-fastening bolts 62 and the horizontal bolts 70 in the vehicle longitudinal direction.

[0064] 1 and 5, a through hole 24B is formed in the upper flange portion 24, and a through hole 26B is formed in the lower flange portion 26. Furthermore, a plurality of through holes 64B are formed in the lower wall portion 64 of the battery side frame 28 at positions corresponding to the through holes 24B and 26B. Furthermore, as shown in FIG. 5, blind nuts 76 are provided around the periphery of the through holes 64B of the battery side frame 28. The case retention bolts 74 are threaded into the blind nuts 76, which are inserted through the through holes 26B, 24B, and 64B from the vehicle lower side of the lower flange portion 26.

[0065] As shown in FIG. 1 , the battery frame 14, even in the pair of front and rear battery cross frames 30, is fastened to the upper flange portion 24 and the lower flange portion 26 of the battery case 16 by a plurality of case retention bolts 74. The case retention bolts 74 are arranged at corners 14A of the battery frame 14. Note that the battery case does not have to be fixed to the battery frame at the corners. Alternatively, for example, horizontal bolts may be arranged at the corners of the battery frame.

[0066] (Floor cross member 78) As shown in FIG. 6, a floor cross member 78 that forms the framework of the lower part of the vehicle body extends in the vehicle width direction above the battery case 16. The floor cross member 78 is disposed in a position corresponding to the center pillar 32 in the vehicle longitudinal direction. The floor cross member 78 is also disposed in a position that overlaps with the extension portion 58 (see FIGS. 3 to 5) when viewed from the side of the vehicle. The end of the floor cross member 78 in the vehicle width direction is fixed to the inner side of the extension portion 58 (see FIGS. 3 to 5) of the rocker 34 in the vehicle width direction. As described above, the vehicle 12 according to this embodiment has been described as having the upper case 20 that also serves as a floor case, but this is not limited to this, and a floor panel may be disposed along the lower end of the floor cross member.

[0067] (Bracket 80) The inner surface of the center pillar 32 in the vehicle width direction, the upper surface of the vehicle at the end of the floor cross member 78 in the vehicle width direction, and the upper surface of the upper case 20 of the battery case 16 are connected by a bracket 80.

[0068] The bracket 80 includes a main body 82 that is generally triangular when viewed from the vehicle front-rear direction and connects the vehicle width direction inner surface of the center pillar 32 and the vehicle upper surface of the vehicle width direction end of the floor cross member 78. The bracket 80 also includes a pair of front and rear first extending portions 84 that extend from the main body 82 along the vehicle upper surface of the floor cross member 78. The front first extending portion 84 extends from the front end of the main body 82 toward the vehicle front side. The rear first extending portion 84 extends from the rear end of the main body 82 toward the vehicle rear side. The bracket 80 also includes a pair of front and rear second extending portions 86 that extend from the pair of front and rear first extending portions 84 toward the vehicle lower side along the vehicle front side surface and vehicle rear side surface of the floor cross member 78, respectively.

[0069] Furthermore, the bracket 80 has a pair of front and rear flange portions 88. Each flange portion 88 includes an upper flange portion 88A extending substantially horizontally above the vehicle, a lower flange portion 88B extending substantially horizontally below the vehicle, and a connecting portion 88C connecting an inner end of the upper flange portion 88A in the vehicle width direction to an outer end of the lower flange portion 88B in the vehicle width direction in the up-down direction of the vehicle, and is formed in a crank shape when viewed from the front-rear direction of the vehicle. The upper flange portion 88A is disposed along the inner upper wall portion 52 of the extension portion 58 of the rocker 34. The lower flange portion 88B is disposed along the surface of the upper case 20 of the battery case 16 above the vehicle and extends from the lower end of the second extension portion 86. Furthermore, the connecting portion 88C is arranged along the upper inner wall portion 46 of the extension portion 58 of the rocker 34 and the inner wall portion 60 of the battery side frame 28, and extends from the end portion of the second extension portion 86 in the vehicle width direction.

[0070] The pair of flange portions 88 are fastened at their upper flange portions 88A to the inner upper wall portion 52 of the rocker 34 with bolts 90 and weld nuts (not shown). The pair of flange portions 88 are fastened at their lower flange portions 88B to the upper case 20 of the battery case 16 with two sets of bolts 92 and weld nuts (not shown). Note that the shape and fixing manner of the brackets are not limited to those described above.

[0071] (action) Next, the operation of this embodiment will be described.

[0072] In a vehicle 12 equipped with the vehicle side structure according to this embodiment, as shown in FIGS. 3 to 5 , when a barrier B collides with the left side of the vehicle 12 (hereinafter referred to as a "side collision"), a load is input to the center pillar 32 at the vehicle upper side of the rocker 34. At this time, a moment is generated in the rocker 34, which is connected to the lower end of the center pillar 32, in a direction that causes the rocker 34 to collapse inward in the vehicle width direction, with the vehicle's fore-and-aft direction as its axial direction. Here, the battery side frame 28 is disposed below the extension portion 58 of the rocker 34. Therefore, the extension portion 58 receives an upward reaction force from the battery side frame 28, thereby preventing the rocker 34 from collapsing inward in the vehicle width direction.

[0073] The rocker 34 includes a main body 56 and an extension 58, and is disposed so as to be applied from the upper side of the battery side frame 28 to the outer side in the vehicle width direction. This arrangement positions the rotation axis of the moment generated in the rocker 34 during a side collision of the vehicle 12 lower than when the rocker is disposed only on the upper side of the battery side frame. This causes the load input from the rocker 34 to the battery side frame 28 to be input diagonally downward (toward the lower side of the vehicle and inward in the vehicle width direction). This makes it easier for a moment with its axis aligned in the fore-and-aft direction of the vehicle to be generated in the battery side frame 28 as well. Therefore, the torsional rigidity of the battery side frame 28 can be utilized to prevent the rocker 34 from tipping inward in the vehicle width direction.

[0074] Furthermore, in the vehicle 12 equipped with the vehicle side structure according to this embodiment, the battery side frames 28 have higher bending rigidity than the rocker 34, so that the extension portions 58 of the rocker 34 can receive a large reaction force from the battery side frames 28 toward the upper side of the vehicle. This effectively prevents the rocker 34 from tipping over.

[0075] Furthermore, in a vehicle 12 equipped with the vehicle side structure of this embodiment, the battery side frame 28 has high torsional rigidity and is less likely to twist, which further suppresses rotation of the rocker 34 with its axial direction aligned in the fore-and-aft direction of the vehicle.

[0076] Furthermore, in the vehicle 12 equipped with the vehicle side structure of this embodiment, the extension portion 58 extends wider than the center of the vehicle width direction of the battery side frame 28 to the inside of the vehicle width direction, thereby enabling efficient transmission of load from the extension portion 58 to the battery side frame 28.

[0077] Furthermore, when the center pillar 32 collapses during a side collision of the vehicle 12 and the rocker 34 rotates about its axial direction, the vehicle longitudinal direction, a load is input from the extension portion 58 to the battery side frame 28 in a diagonally downward direction. At this time, because the extension portion 58 extends further inward in the vehicle width direction than the vehicle width center of the battery side frame 28, a moment is generated in the battery side frame 28 in a direction that causes the battery side frame 28 to collapse inward in the vehicle width direction. Here, the entire portion of the battery side frame 28 that is outward in the vehicle width direction than the vehicle width center is located below the extension portion 58. Therefore, when the battery side frame 28 attempts to rotate in a direction that causes it to collapse inward in the vehicle width direction, the extension portion 58 of the rocker 34 is pushed upward in the vehicle by the portion of the battery side frame 28 that is outward in the vehicle width direction than the vehicle width center. This suppresses the rotation of the rocker 34.

[0078] Furthermore, according to the vehicle 12 equipped with the vehicle side structure of this embodiment, a wide area including the extension portion 58 has a closed cross-sectional structure, so the rigidity of the rocker 34 can be improved compared to when a flat extension portion extends from the main body portion toward the inside in the vehicle width direction.

[0079] Furthermore, in a vehicle 12 equipped with the vehicle side structure according to this embodiment, as shown in FIG. 3 , the battery side frame 28 is fastened to the intermediate wall 50 of the extension 58 of the rocker 34 by the co-fastening bolt 62. Therefore, the load transmitted from the center pillar 32 to the rocker 34 during a side collision is transmitted from the surface of the intermediate wall 50 on the lower side of the vehicle to the upper wall 66 of the battery side frame 28. In other words, the intermediate wall 50 of the extension 58 receives a reaction force from the surface of the upper wall 66 of the battery side frame 28. This further prevents the rocker 34 from tipping over.

[0080] Furthermore, in a vehicle 12 equipped with the vehicle side structure according to this embodiment, as shown in FIG. 4 , when a side collision occurs and the center pillar 32 collapses, the rocker 34 rotates and attempts to collapse inward in the vehicle width direction. As a result, the main body 56 attempts to move (rotate) outward in the vehicle width direction, i.e., away from the battery side frame 28. At this time, the main body 56 is fixed to the battery side frame 28 located on the inner side in the vehicle width direction. As a result, the main body 56 is pulled inward in the vehicle width direction by the battery side frame 28. This further suppresses the rotation of the rocker 34. In particular, as shown in FIG. 1 , the battery frame 14 is formed in a substantially rectangular shape in a plan view, and the pair of left and right battery side frames 28 are connected by the pair of front and rear battery cross frames 30. This further increases the force with which the battery side frame 28 pulls the main body 56 inward in the vehicle width direction.

[0081] Furthermore, in the vehicle 12 equipped with the vehicle side structure according to this embodiment, the battery side frame 28 is fixed to the battery case 16, which has high rigidity to accommodate the battery 18, and therefore receives a reaction force from the battery case 16 during a side collision of the vehicle 12. This increases the reaction force that the extension portion 58 receives from the battery side frame 28. This further suppresses rotation of the rocker 34.

[0082] Furthermore, in the vehicle 12 equipped with the vehicle side structure according to this embodiment, the battery case 16 is fixed to the vehicle lower side of the battery side frame 28 at the upper flange portion 24 and the lower flange portion 26. Therefore, the battery 18 can be mounted up to the vicinity of the inner side of the battery side frame 28 in the vehicle width direction, thereby increasing the battery capacity.

[0083] Furthermore, in a vehicle 12 equipped with the vehicle side structure according to this embodiment, when a moment is generated in the rocker 34 due to the center pillar 32 tipping over during a side collision, as shown in Figure 3, a load is applied to the upper part of the co-fastening bolt 62 connecting the extension portion 58 to the battery side frame 28 in a direction toward the inside in the vehicle width direction. At this time, the lower end of the co-fastening bolt 62 connecting the battery side frame 28 to the upper flange portion 24 and the lower flange portion 26 attempts to move toward the outside in the vehicle width direction.

[0084] In this way, the co-fastening bolt 62 penetrates the battery side frame 28 and co-fastens the extension portion 58, battery side frame 28, upper flange portion 24, and lower flange portion 26, thereby efficiently transmitting the load from the rocker 34 to the battery side frame 28 and battery case 16. Furthermore, the rotation of the co-fastening bolt 62 as described above generates a large moment in the battery side frame 28. Therefore, the torsional rigidity of the battery side frame 28 can be further utilized to prevent the rocker 34 from tipping over.

[0085] Furthermore, in a vehicle 12 equipped with the vehicle side section structure according to this embodiment, as shown in Fig. 4, the lower inner wall portion 48 of the main body portion 56, which is located on the inner side in the vehicle width direction, is fastened in the vehicle width direction to the outer wall portion 72 of the battery side frame 28, which is located on the outer side in the vehicle width direction, by the horizontal bolt 70. Therefore, when the main body portion 56 attempts to tip inward in the vehicle width direction during a side collision, the force that causes the main body portion 56 to move away from the battery side frame 28 is quickly transmitted from the fastening point of the horizontal bolt 70 to the fastening point of the co-fastening bolt 62 (see Fig. 3), and can be received as a shear load at the fastening point of the co-fastening bolt 62. This effectively prevents the main body portion 56 from rotating and, therefore, the center pillar 32 from tipping over.

[0086] Furthermore, in a vehicle 12 equipped with the vehicle side structure according to this embodiment, the horizontal bolts 70 (see FIG. 4) and the co-fastening bolts 62 are alternately arranged at equal intervals from the front side of the vehicle, as shown in FIG. 1. This prevents the load from being unevenly transmitted to one area, and makes use of the bending rigidity and torsional rigidity of the battery side frame 28 to efficiently prevent the rocker 34 from tipping over.

[0087] Furthermore, in a vehicle 12 equipped with the vehicle side structure according to this embodiment, as shown in Fig. 5, the lower wall portion 64 located on the vehicle lower side of the battery side frame 28 is fastened to the upper flange portion 24 and the lower flange portion 26 of the battery case 16 by case retention bolts 74 arranged at equal intervals, in addition to the co-fastening bolts 62. This allows the battery case 16 to be more stably supported by the battery side frame 28, and also allows the battery side frame 28 to receive an even greater reaction force from the battery case 16 in the event of a side collision. This further reduces the possibility of the rocker 34 tipping over.

[0088] 2, in the vehicle 12 equipped with the vehicle side structure according to this embodiment, the battery side frame 28 is fixed to the rocker 34 by the horizontal bolt 70 at a position corresponding to the center pillar 32 in the vehicle longitudinal direction. This allows the extension 58 to obtain a reaction force from the battery side frame 28 even more effectively.

[0089] Furthermore, in a vehicle 12 equipped with the vehicle side structure according to this embodiment, as shown in Figures 3 to 6, when the rocker 34 attempts to move inward in the vehicle width direction during a side collision, the rocker 34 receives a reaction force from the floor cross member 78, which is positioned so as to overlap the extension portion 58 when viewed from the side of the vehicle. This prevents the rocker 34 from moving inward in the vehicle width direction. This provides even better protection for the passenger compartment.

[0090] Furthermore, in a vehicle 12 equipped with the vehicle side structure of this embodiment, the floor cross member 78 is fixed to the inside of the extension portion 58 in the vehicle width direction, so the load transmitted from the rocker 34 during a side collision of the vehicle 12 is input directly from the extension portion 58 to the floor cross member 78. Therefore, the rocker 34 can obtain a large reaction force toward the outside in the vehicle width direction from the floor cross member 78 extending in the vehicle width direction.

[0091] Furthermore, in a vehicle 12 equipped with the vehicle side structure of this embodiment, as shown in Figure 6, the floor cross member 78 is positioned at a position corresponding to the center pillar 32 in the fore-and-aft direction of the vehicle, so that the rocker 34 can obtain a large reaction force from the floor cross member 78 at the position where the center pillar 32 collapses during a side collision of the vehicle 12.

[0092] Furthermore, in a vehicle 12 equipped with the vehicle side structure according to this embodiment, the inner surface of the center pillar 32 in the vehicle width direction receives reaction forces from the upper surface of the vehicle at the end of the floor cross member 78 in the vehicle width direction and the upper surface of the upper case 20 of the battery case 16 via the bracket 80. This further effectively prevents the center pillar 32 from collapsing.

[0093] [Supplementary explanation of the above embodiment] In the above embodiment, the bending rigidity of the battery side frame 28 is described as being higher than the bending rigidity of the rocker 34, but this is not limiting, and the bending rigidity of the battery side frame may be lower than the bending rigidity of the rocker.

[0094] Furthermore, in the above embodiment, the torsional rigidity of the battery side frame 28 is described as being higher than the torsional rigidity of the rocker 34, but this is not limited thereto, and the torsional rigidity of the battery side frame may be lower than the torsional rigidity of the rocker.

[0095] Furthermore, in the above embodiment, the upper inner wall portion 46 of the rocker 34 is described as being formed flush with the inner wall portion 60 located on the inner side of the battery side frame 28 in the vehicle width direction, but this is not limited to this. For example, the extension portion may extend further inward in the vehicle width direction than the inner wall portion of the battery side frame. Also, the upper inner wall portion of the extension portion may be located further outward in the vehicle width direction than the inner wall portion of the battery side frame.

[0096] Furthermore, in the above embodiment, as shown in Fig. 3, the battery side frame 28 is fastened to the vehicle lower side of the extension portion 58 by the co-fastening bolt 62, but this is not limited to this. For example, the battery side frame may be connected to the vehicle lower side of the extension portion via a separate member. Also, there may be a gap between the battery side frame and the extension portion.

[0097] In the above embodiment, the battery side frame 28 is described as being fixed to the inside of the main body 56 in the vehicle width direction, but this is not limited to this. For example, the battery side frame may be connected to the inside of the main body 56 in the vehicle width direction via a separate member. Also, there may be a gap between the battery side frame and the main body.

[0098] Furthermore, in the above embodiment, the battery side frames 28 are described as being fixed to the battery case 16, but this is not limiting, and the battery side frames do not have to be fixed to the battery case. Furthermore, the vehicle does not have to have a battery case. For example, a battery lower panel may be provided below the battery frame, and the battery may be disposed inside the battery frame and above the battery lower panel.

[0099] Furthermore, in the above embodiment, the battery case 16 has been described as having the upper flange portion 24 and the lower flange portion 26, and being fixed to the vehicle lower side of the battery side frame 28 at the upper flange portion 24 and the lower flange portion 26, but this is not limited thereto. The battery case may be fixed to the battery frame at a location other than the flange portion.

[0100] Furthermore, in the above embodiment, the extension portion 58, the battery side frame 28, the upper flange portion 24 and the lower flange portion 26 are described as being fastened together in the vertical direction of the vehicle by a fastening bolt 62 that passes through the battery side frame 28, but this is not limited to this, and the vehicle side structure does not need to be equipped with a fastening bolt 62.

[0101] Furthermore, in the above embodiment, the lower inner wall portion 48 located on the inner side of the vehicle width direction in the main body portion 56 is described as being fastened in the vehicle width direction to the outer wall portion 72 located on the outer side of the vehicle width direction in the battery side frame 28 by the horizontal bolt 70, but this is not limited to this, and the vehicle side structure does not need to be equipped with the horizontal bolt 70.

[0102] Furthermore, in the above embodiment, the co-fastening bolts 62 and the lateral bolts 70 are described as being alternately arranged at equal intervals from the front side of the vehicle, but this is not limited to this. For example, two co-fastening bolts and two lateral bolts may be alternately arranged. Also, for example, two co-fastening bolts and one lateral bolt may be alternately arranged. Furthermore, for example, one co-fastening bolt, one lateral bolt, and one case holding bolt may be arranged at equal intervals.

[0103] Furthermore, in the above embodiment, the lower wall portion 64 located on the vehicle lower side of the battery side frame 28 is described as being fastened to the battery case 16 by case retaining bolts 74 arranged at equal intervals between the co-fastening bolt 62 and the horizontal bolt 70, but this is not limited to this, and the vehicle side structure does not have to be equipped with case retaining bolts 74.

[0104] Furthermore, in the above embodiment, the battery side frame 28 is described as being fixed to the rocker 34 by the horizontal bolt 70 at a position corresponding to the center pillar 32 in the vehicle longitudinal direction, but this is not limited to this. For example, the battery side frame may be fixed to the rocker by a co-fastening bolt at a position corresponding to the pillar in the vehicle longitudinal direction. Even in this case, the extension portion can effectively obtain a reaction force from the battery side frame. Furthermore, the battery side frame 28 may be fixed to the rocker at a position overlapping with another pillar, such as a front pillar or a rear pillar, rather than the center pillar 32.

[0105] Furthermore, in the above embodiment, the floor cross member 78 is described as being positioned so as to overlap the extension portion 58 when viewed from the side of the vehicle, but this is not limiting, and as long as the floor cross member is positioned so as to overlap at least a portion of the extension portion when viewed from the side of the vehicle, movement of the rocker toward the inside in the vehicle width direction is suppressed. Note that the floor cross member may also be positioned so as not to overlap the extension portion when viewed from the side of the vehicle.

[0106] In the above embodiment, the floor cross member 78 is described as being fixed to the inner side of the extension portion 58 in the vehicle width direction, but this is not limited to this. For example, the floor cross member may be fixed to the rocker at another location. Also, the floor cross member does not have to be fixed directly to the rocker.

[0107] Furthermore, in the above embodiment, the floor cross member 78 was described as being positioned at a position corresponding to the center pillar 32 in the fore-and-aft direction of the vehicle, but this is not limited to this, and it may also be positioned offset from the center pillar in the fore-and-aft direction of the vehicle.

[0108] Furthermore, in the above embodiment, the vehicle 12 has been described as including a bracket 80 that connects the vehicle width direction inner surface of the center pillar 32, the vehicle width direction end surface of the floor cross member 78 on the vehicle upper side, and the vehicle width direction end surface of the battery case 16, but this is not limited to this. For example, the vehicle may be provided with a bracket that does not extend to the battery case, but only connects the vehicle width direction inner surface of the center pillar to the vehicle width direction end surface of the floor cross member on the vehicle upper side. Also, the vehicle may not be provided with a bracket.

[0109] In the above embodiment, four co-fastening bolts 62 are arranged between five horizontal bolts 70, and case holding bolts 74 are arranged at corners 14A of the battery frame 14. However, this is not limited to this. For example, a vehicle side structure according to a modified example shown in Fig. 7 may be adopted. In the following modified examples, the same components as those in the embodiment are denoted by the same reference numerals, and their description will be omitted as appropriate.

[0110] (Variation) 7, five co-fastening bolts 62 are arranged in a vehicle 100 equipped with a vehicle side structure according to a modified example. Specifically, at a corner on the vehicle rear side of the battery frame 102, a through hole 64A through which the co-fastening bolt 62 is inserted is formed in a lower wall portion 106 located on the vehicle lower side of the battery side frame 104. In addition, a through hole 66A through which the co-fastening bolt 62 is inserted is formed in an upper wall portion 108 located on the vehicle upper side of the battery side frame 104.

[0111] The battery case 110 includes an upper case 112 and a lower case 114. An upper flange portion 116 of the upper case 112 has a through hole 24A formed in a corner on the vehicle rear side. Furthermore, a lower flange portion 118 of the lower case 114 has a through hole 26A formed in a corner on the vehicle rear side. In other words, the co-fastening bolt 62 arranged furthest to the vehicle rear is arranged in the corner on the vehicle rear side of the battery frame 102 and battery case 110. This improves the rigidity of the rear end portion of the battery frame 102. The co-fastening bolt may be arranged in a corner on the vehicle front side of the battery frame. Furthermore, the horizontal bolt may be arranged in a corner of the battery frame.

[0112] In this modified example, the third co-fastening bolt 62 from the front of the vehicle is provided at a position corresponding to a pillar (not shown). Note that, as in the above embodiment, the horizontal bolt may be disposed at a position corresponding to the pillar. [Explanation of symbols]

[0113] 10 Left side of vehicle (side of vehicle) 12,100 vehicles 16, 110 Battery Case 18 Battery 24, 116 Upper flange (flange) 26, 118 Lower flange (flange) 28 Battery side frame (framework member) 32 Center pillar (pillar) 34 Rocca 48 Lower inner wall (inner wall) 56 Main body 58 Extension 62 Co-fastening bolt (first fastener) 70 Horizontal bolt (second fastener) 72 Exterior wall 74 Case retaining bolt (third fastener) 78 Floor cross member 80 Bracket

Claims

1. a pillar extending in the vehicle vertical direction at a side of the vehicle; a rocker extending in the vehicle longitudinal direction below the pillar and connected to the pillar, the rocker including a main body portion and an extension portion extending inward in the vehicle width direction from an upper portion of the main body portion; a framework member disposed on the inner side of the main body portion in the vehicle width direction and on the vehicle lower side of the extension portion; A vehicle side structure having:

2. the framework member is a battery side frame extending in the front-rear direction of the vehicle, The extension portion extends to a position inward in the vehicle width direction relative to the center of the battery side frame in the vehicle width direction. The vehicle side structure according to claim 1 .

3. The rocker has a closed cross-sectional structure formed by the main body portion and the extension portion. The vehicle side structure according to claim 1 .

4. The battery side frame is fixed to the vehicle lower side of the extension portion. The vehicle side structure according to claim 2.

5. The battery side frame is fixed to the vehicle width direction inner side of the main body portion. The vehicle side structure according to claim 2.

6. The battery side frame is disposed under the vehicle and is fixed to a battery case that houses a battery. The vehicle side structure according to claim 2.

7. The battery case includes a flange portion extending in the vehicle width direction, and is fixed to the vehicle lower side of the battery side frame at the flange portion. The vehicle side structure according to claim 6.

8. The extension portion, the battery side frame, and the flange portion are fastened together in the vehicle vertical direction by a first fastener that penetrates the battery side frame. The vehicle side structure according to claim 7.

9. an inner wall portion of the main body portion located on the inner side in the vehicle width direction is fastened in the vehicle width direction by a second fastener to an outer wall portion of the battery side frame located on the outer side in the vehicle width direction; The vehicle side structure according to claim 8.

10. The first fasteners and the second fasteners are alternately arranged at equal intervals in the vehicle front-rear direction. The vehicle side structure according to claim 9.

11. A lower wall portion located on the vehicle lower side of the battery side frame is fastened to the flange portion by third fasteners arranged at equal intervals between the first fasteners and the second fasteners. The vehicle side structure according to claim 9.

12. The battery side frame is fixed to the rocker at a position corresponding to the pillar in the vehicle front-rear direction. The vehicle side structure according to claim 4 or 5.

13. The vehicle further includes a floor cross member extending in the vehicle width direction above the battery case, The floor cross member is disposed at a position overlapping at least a portion of the extension portion when viewed from the side of the vehicle. The vehicle side structure according to claim 6.

14. The floor cross member is fixed to the extension portion. The vehicle side structure according to claim 13.

15. The floor cross member is disposed at a position corresponding to the pillar in the vehicle longitudinal direction. The vehicle side structure according to claim 13.

16. a bracket connecting a vehicle width direction inner surface of the pillar, a vehicle width direction end surface of the floor cross member on the vehicle upper side, and a vehicle width direction end surface of the battery case on the vehicle upper side; The vehicle side structure according to claim 13.

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