body

Abstract

To provide a vehicle body structure that is able to reduce manufacturing cost and improve side rigidity / side strength, etc.SOLUTION: The disclosed vehicle body structure may include: a floor assembly 2 having a center floor 2a and a rear floor 2b; a pair of side structures 3 connected to both sides of the floor assembly 2; and a pair of side sills 10 connected to both sides of the floor assembly 2. Each of the side sills 10 may include: an inner side sill extending toward an interior of the vehicle; an outer side sill extending toward an exterior of the vehicle; and a first side sill reinforcement 13 and a second side sill reinforcement 14 disposed between the inner side sill and the outer side sill. A rear end of the first side sill reinforcement 13 may be overlapped with a front end of the second side sill reinforcement 14.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a vehicle body structure, and more particularly to a vehicle body structure that improves the collision performance of a vehicle by improving lateral rigidity / lateral strength, etc. [Background technology]

[0002] In recent years, as awareness of the threat to the environment and the depletion of petroleum resources has increased, research and development into environmentally friendly electric vehicles (EVs) and fuel cell electric vehicles (FCEVs) has emerged. Examples of EVs include plug-in hybrid electric vehicles (PHEVs) and battery electric vehicles (BEVs).

[0003] An electric vehicle has a high-voltage battery assembly mounted on the vehicle body, which includes one or more battery cells (or battery modules), electrical components related to the one or more battery cells, a battery case to which the battery cells and electrical components are attached, and a cover that covers the top of the battery case. Multiple cross members are fixed inside the battery case, and the rigidity and strength of the battery case are enhanced by the multiple cross members.

[0004] A vehicle includes a pair of side sills located on the left and right sides of the floor. The front end of each side sill is connected to the rear end of the front side member, and the rear end of each side sill is connected to the front end of the rear side member. The side sills serve to protect the passenger compartment from side collisions and frontal collisions of the vehicle.

[0005] Each side sill includes an inner side sill connected to the edge of the floor, an outer side sill facing the outside of the vehicle, and a side sill reinforcement member interposed between the inner side sill and the outer side sill.

[0006] A sports utility vehicle (SUV), sedan, etc. has front side doors swingably mounted in the front side region of the vehicle body and rear side doors swingably mounted in the rear side region of the vehicle body. The cross section of the side sill reinforcement is maintained the same in the front side region and the rear side region.

[0007] A multipurpose vehicle (MPV) has a front side door swingably attached to the front side region of the vehicle body and a rear side door slidably attached to the rear side region of the vehicle body, the front side door being a swing door and the rear side door being a sliding door. The multipurpose vehicle has a roller guide track disposed on the side sill located in the rear side region, which is configured to guide the movement of a roller carrier of the sliding door. By disposing the roller guide track on the side sill in the rear side region, the cross section of the side sill reinforcement changes between the front side region and the rear side region. That is, the cross-sectional area of ​​the side sill reinforcement in the rear side region is smaller than the cross-sectional area of ​​the side sill reinforcement in the front side region. In particular, after a side sill reinforcement having a certain length is produced by an extrusion process, a certain portion is cut to fit the roller guide track attached to the rear side region.

[0008] As such, some vehicles using sliding doors have the disadvantage that the body assembly process becomes complicated because part of the side reinforcement is cut, and the manufacturing cost increases due to the increased amount of scrap.

[0009] The matters described in this background art section are created to enhance understanding of the background of the invention, and may include matters that are not prior art known to those having ordinary skill in the field to which the technology belongs. Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention has been arrived at in consideration of the above, and its object is to provide a vehicle body structure that can reduce manufacturing costs and improve lateral rigidity / strength, etc. [Means for solving the problem]

[0011] To achieve the above-mentioned object, one aspect of the present invention provides a vehicle body structure that includes a floor assembly having a center floor and a rear floor, a pair of side structures connected to opposite sides of the floor assembly, and a pair of side sills connected to opposite sides of the floor assembly. Each side sill may include an inner side sill facing the interior of the vehicle, an outer side sill facing the exterior of the vehicle, and first and second side sill reinforcements disposed between the inner and outer side sills. A rear end of the first side sill reinforcement may be configured to overlap a front end of the second side sill reinforcement.

[0012] Each side structure has a front side region facing the front of the vehicle and a rear side region facing the rear of the vehicle, and the first side sill reinforcement can be arranged at the lower end of the front side region and the second side sill reinforcement can be arranged at the lower end of the rear side region.

[0013] The first side sill reinforcement may have an incision limited to a rear end thereof, the incision extending along the length of the first side sill reinforcement.

[0014] A front portion of the second side sill reinforcement may be received within the cutout in the first side sill reinforcement.

[0015] The first side sill reinforcement may be integrally connected to each side structure, and the second side sill reinforcement may be integrally connected to the floor assembly.

[0016] The vehicle may further include a battery assembly disposed below the floor assembly. The battery assembly may have a battery housing and a pair of side mounts provided on both sides of the battery housing. The battery assembly may be connected to the first side sill reinforcement and the second side sill reinforcement via the side mounts.

[0017] Each side mount of the battery assembly may be commonly connected to a rear end of the first side sill reinforcement and a front end of the second side sill reinforcement via a mount bolt.

[0018] A vehicle body structure according to an embodiment of the present invention may include a first through pipe embedded in the first side sill reinforcement, and a first mounting bolt passing through each side mount and threadedly coupled to the first through pipe.

[0019] The vehicle body structure according to an embodiment of the present invention may include a second through pipe embedded in the second side sill reinforcement, and a second mounting bolt passing through each side mount and threadedly coupled to the second through pipe.

[0020] A vehicle body structure according to an embodiment of the present invention may include a third through pipe embedded in a rear portion of the first side sill reinforcement, a fourth through pipe embedded in a front portion of the second side sill reinforcement, and a third mount bolt that passes through each side mount and is commonly screw-coupled to the third through pipe and the fourth through pipe.

[0021] A vehicle body structure according to another embodiment of the present invention may further include a hydrogen tank disposed below the floor assembly, the hydrogen tank being connected to the first side sill reinforcement and the second side sill reinforcement via a support frame, and the support frame being commonly connected to a rear end of the first side sill reinforcement and a front end of the second side sill reinforcement via a mounting bolt.

[0022] The support frame may include a first lateral member connected to the first side sill reinforcement, a second lateral member connected to the second side sill reinforcement, and a third lateral member commonly connected to a rear portion of the first side sill reinforcement and a front portion of the second side sill reinforcement.

[0023] A vehicle body structure according to another embodiment of the present invention may include a first through pipe embedded in the first side sill reinforcement, and a first mounting bolt passing through the first lateral member and threadedly coupled to the first through pipe.

[0024] A vehicle body structure according to another embodiment of the present invention may include a second through pipe embedded in the second side sill reinforcement, and a second mounting bolt passing through the second lateral member and threadedly coupled to the second through pipe.

[0025] A vehicle body structure according to another embodiment of the present invention may include a third through pipe embedded in a rear portion of the first side sill reinforcement, a fourth through pipe embedded in a front portion of the second side sill reinforcement, and a third mounting bolt that passes through the third cross member and is commonly screw-connected to the third through pipe and the fourth through pipe. [Effects of the Invention]

[0026] According to the present invention, the overlapping portion between the first side sill reinforcement arranged at the lower end of the front side region of the vehicle and the second side sill reinforcement arranged at the lower end of the rear side region of the vehicle body is relatively short, so that the cutting length for forming the incision at the rear end of the first side sill reinforcement can be minimized, thereby significantly reducing manufacturing costs.

[0027] According to the present invention, the first side sill reinforcement is integrally connected to the lower end of each side structure, and the second side sill reinforcement is integrally connected to each edge of the floor assembly. This eliminates the need to additionally assemble the first and second side sill reinforcements during assembly of the vehicle body, allowing the number of assembly steps to be maintained at the same level as in the past, thereby reducing investment costs and manufacturing costs.

[0028] According to the present invention, the battery assembly or hydrogen tank assembled below the floor assembly is commonly connected to the rear end of the first side sill reinforcement and the front end of the second side sill reinforcement via mounting bolts, etc., thereby strengthening the connection rigidity of the first side sill reinforcement and the second side sill reinforcement, thereby improving the rigidity / strength of the vehicle body. [Brief explanation of the drawings]

[0029] [Figure 1] 1 is a perspective view showing a vehicle body according to an embodiment of the present invention; [Figure 2] FIG. 2 is a perspective view showing a side structure of the vehicle body shown in FIG. [Figure 3] FIG. 2 is a perspective view showing a floor assembly of the vehicle body shown in FIG. [Figure 4] FIG. 2 is a diagram showing a side view of the vehicle body shown in FIG. [Figure 5] FIG. 2 is a diagram showing the bottom of the vehicle body shown in FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line AA in FIG. 5. [Figure 7] FIG. 6 is a cross-sectional view taken along line BB in FIG. 5. [Figure 8] FIG. 6 is a cross-sectional view taken along line CC in FIG. 5. [Figure 9] FIG. 10 is a diagram showing the bottom of a vehicle body according to another embodiment of the present invention. [Figure 10] FIG. 10 is a cross-sectional view taken along the line DD in FIG. 9. [Figure 11] FIG. 10 is a cross-sectional view taken along the line EE in FIG. 9. [Figure 12] FIG. 10 is a cross-sectional view taken along the line FF in FIG. 9. DETAILED DESCRIPTION OF THE INVENTION

[0030] Some embodiments of the present invention will be described in detail below with reference to exemplary drawings. When referring to components in each drawing, it should be noted that the same components are referred to by the same reference numerals whenever possible, even when they appear in different drawings. Furthermore, when describing embodiments of the present invention, if a detailed description of related well-known structures or functions is deemed to hinder understanding of the embodiments of the present invention, the detailed description will be omitted.

[0031] In describing components of embodiments of the present invention, terms such as "first," "second," "A," "B," "(a)," and "(b)" may be used. These terms are merely used to distinguish a component from other components and do not limit the nature, order, or sequence of the components. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0032] Referring to FIG. 1, a vehicle body 1 according to an embodiment of the present invention may include a floor assembly 2 and a pair of side structures 3 connected to both sides of the floor assembly 2.

[0033] 1 and 3, the floor assembly 2 may include a center floor 2a, a rear floor 2b connected to the rear edge of the center floor 2a, a dash panel 2c connected to the front of the center floor 2a, and a front side member 2d connected to the dash panel 2c. The center floor 2a and the rear floor 2b may be arranged along the longitudinal direction of the vehicle.

[0034] 4, each side structure 3 may have a front side region 4 adjacent to the front of the vehicle and a rear side region 5 adjacent to the rear of the vehicle. A front side door may be swingably attached to the front side region 4, and a rear side door may be slidably attached to the rear side region 5.

[0035] 1, a vehicle body 1 according to an embodiment of the present invention may include a pair of side sills 10 connected to both side edges of a floor assembly 2. In particular, each side sill 10 may be connected to a center floor 2a and a rear floor 2b.

[0036] Each side sill 10 can include an inner side sill 11 facing the interior of the vehicle, an outer side sill 12 facing the exterior of the vehicle, and first and second side sill reinforcements 13, 14 arranged between the inner side sill 11 and the outer side sill 12.

[0037] The inner side sill 11 may extend along the length of the vehicle, and may be coupled to each edge of the center floor 2a and each edge of the rear floor 2b by fasteners, welding, etc. Referring to Figures 6 and 8, the front end of the inner side sill 11 may be connected to each edge of the center floor 2a by fasteners, welding, etc. Referring to Figure 7, the rear end of the inner side sill 11 may be connected to each edge of the rear floor 2b by fasteners, welding, etc.

[0038] The outer side sill 12 can extend along the length of the vehicle, and the outer side sill 12 can be integrally connected to the lower end of each side structure 3.

[0039] The outer side sill 12 is joined to the inner side sill 11 by fasteners, welding, or the like, so that the outer side sill 12 and the inner side sill 11 define a cavity, and the first side sill reinforcement 13 and the second side sill reinforcement 14 can be disposed within the cavity. The first side sill reinforcement 13 and the second side sill reinforcement 14 can be connected in a line along the longitudinal direction of the vehicle, and the rear end 13a of the first side sill reinforcement 13 can be connected to the front end 14a of the second side sill reinforcement 14.

[0040] The first side sill reinforcement 13 can be located at the lower end of the front side region 4, where the first side sill reinforcement 13 can be located below the front side door (not shown). Because the front side door is a swing door, the first side sill reinforcement 13 can be entirely filled within the cavity defined by the inner side sill 11 and the outer side sill 12.

[0041] The first side sill reinforcement 13 may extend along the length of the vehicle, and may have an incision 13b limited to its rear end 13a. The incision 13b may extend in the length direction of the first side sill reinforcement 13. The lower portion of the rear end 13a of the first side sill reinforcement 13 may be cut to a certain length, so that the incision 13b may be limited to the lower portion of the rear end of the first side sill reinforcement 13.

[0042] The second side sill reinforcement 14 may be located at the lower end of the rear side region 5, where the second side sill reinforcement 14 may be located below a rear side door (not shown). The rear side door may be a sliding door, where a roller guide track 16 may be located at the top of the side sill 10, the roller guide track 16 may be open toward the exterior of the vehicle, and the roller guide track 16 may be configured to guide the movement of a roller carrier 18 of the rear side door. The second side sill reinforcement 14 may be disposed below the roller guide track 16, where the second side sill reinforcement 14 may be disposed within a cavity of the side sill 10 so as to be adjacent to the bottom of the side sill 10. The second side sill reinforcement 14 may extend along the length of the vehicle, and the second side sill reinforcement 14 may have a forward end 14a that is received in the cutout 13b of the first side sill reinforcement 13.

[0043] By accommodating the front end 14a of the second side sill reinforcement 14 in the cutout 13b of the first side sill reinforcement 13, the rear end 13a of the first side sill reinforcement 13 can overlap the front end 14a of the second side sill reinforcement 14, thereby allowing the rear end 13a of the first side sill reinforcement 13 and the front end 14a of the second side sill reinforcement 14 to form an overlapping portion 15 having a certain length (s). The overlapping portion 15 can be located within the front side region 4.

[0044] In this way, the present invention makes the overlapping portion 15 of the first side sill reinforcement 13 arranged at the lower end of the front side region 4 and the second side sill reinforcement 14 arranged at the lower end of the rear side region 5 relatively short, thereby minimizing the cutting length for forming the incision portion 13b at the rear end portion 13a of the first side sill reinforcement 13, thereby significantly reducing manufacturing costs.

[0045] The first side sill reinforcement 13 can be attached to the outer side sill 12 via a bracket or the like, and the outer side sill 12 can be integrally connected to the lower end of each side structure 3. The first side sill reinforcement 13 can be integrally connected to the lower end of each side structure 3 via the outer side sill 12. In other words, each side structure 3 can be a single assembly structure including the outer side sill 12 and the first side sill reinforcement 13.

[0046] The second side sill reinforcement 14 can be attached to the inner side sill 11 via a bracket or the like, and the inner side sill 11 can be connected to each edge of the center floor 2a and each edge of the rear floor 2b of the floor assembly 2. The second side sill reinforcement 14 can be integrally connected to each edge of the floor assembly 2 via the inner side sill 11. In other words, the floor assembly 2 can have a single assembly structure including the inner side sill 11 and the second side sill reinforcement 14.

[0047] As described above, the first side sill reinforcement 13 is integrally connected to the lower end of each side structure 3, and the second side sill reinforcement 14 is integrally connected to each edge of the floor assembly 2. This eliminates the need to further assemble the first side sill reinforcement 13 and the second side sill reinforcement 14 when assembling the vehicle body 1. This allows the number of assembly steps to be maintained at the same level as in the conventional method, thereby reducing investment costs and manufacturing costs.

[0048] 5 to 8, the vehicle body according to an embodiment of the present invention may further include a battery assembly 50 arranged below the center floor 2a and rear floor 2b of the floor assembly 2, and the battery assembly 50 may include one or more battery cells (or battery modules), electrical components associated with the one or more battery cells, a battery housing 51 in which the battery cells and electrical components are mounted, and a battery cover 52 that covers the top of the battery housing 51.

[0049] The battery housing 51 may have a pair of side mounts 53 individually provided on both sides thereof. Each side mount 53 may extend toward the side sill 10 and may be connected to the first and second side sill reinforcements 13, 14 via a plurality of mount bolts 61, 62, 63 and a plurality of through pipes 71, 72, 73a, 73b. In particular, each side mount 53 of the battery assembly 50 is commonly connected to the rear end 13a of the first side sill reinforcement 13 and the front end 14a of the second side sill reinforcement 14 via the mount bolts 61, 62, 63, thereby strengthening the connection rigidity of the first side sill reinforcement 13 and the second side sill reinforcement 14 and improving the lateral strength / rigidity of the vehicle body.

[0050] A front portion of each side mount 53 may be connected to the first side sill reinforcement 13 via one or more first mount bolts 61 and one or more first through pipes 71. Referring to FIG. 6 , the first through pipes 71 may be embedded inside the first side sill reinforcement 13, and the first mount bolts 61 may pass through through holes in the side mounts 53 and be screwed into the first through pipes 71, thereby connecting each side mount 53 of the battery assembly 50 to the first side sill reinforcement 13.

[0051] A rear portion of each side mount 53 may be connected to the second side sill reinforcement 14 via one or more second mount bolts 62 and one or more second through pipes 72. Referring to FIG. 7 , the second through pipes 72 may be embedded inside the second side sill reinforcement 14, and the second mount bolts 62 may pass through through holes in the side mounts 53 and be screwed into the second through pipes 72, thereby connecting each side mount 53 of the battery assembly 50 to the second side sill reinforcement 14.

[0052] The middle portion of each side mount 53 may be connected to the overlapping portion 15 of the first side sill reinforcement 13 and the second side sill reinforcement 14 via one or more third mount bolts 63, one or more third through pipes 73a, and one or more fourth through pipes 73b. Referring to FIG. 8 , the third through pipe 73a may be embedded within the rear end portion 13a of the first side sill reinforcement 13, and the fourth through pipe 73b may be embedded within the front end portion 14a of the second side sill reinforcement 14. The third through pipe 73a may be aligned with the fourth through pipe 73b along the vehicle height direction, and the third mount bolt 63 may pass through the through hole of the side mount 53 and be screwed to both the third through pipe 73a and the fourth through pipe 73b, thereby commonly connecting the side mount 53 of the battery housing 51 to the rear end portion 13a of the first side sill reinforcement 13 and the front end portion 14a of the second side sill reinforcement 14.

[0053] Referring to Figures 6 to 8, the side mount 53 can have a support protrusion 54 protruding from its upper surface toward the side sill 10, and when the support protrusion 54 comes into contact with the side sill 10, the side sill 10 can be stably supported by the support protrusion 54.

[0054] 9 to 12, a vehicle body according to another embodiment of the present invention may further include a plurality of hydrogen tanks 81, 82 disposed below the center floor 2a and the rear floor 2b. The hydrogen tanks 81, 82 may be attached to the lower portion of the vehicle body via a plurality of mounting bands or a plurality of mounting brackets 81a, 82a and a support frame 83. Each mounting bracket 81a, 82a may be configured to directly contact the corresponding hydrogen tank 81, 82. For example, each mounting bracket 81a, 82a may be configured in a semicircular shape to correspond to the outer surface of the hydrogen tank 81, 82. The mounting brackets 81a, 82a may be connected to the support frame 83. The support frame 83 may be connected to the first and second side sill reinforcements 13, 14 via a plurality of mounting bolts 161, 162, 163 and a plurality of through-pipes 171, 172, 173a, 173b. In particular, the support frame 83 is commonly connected to the rear end 13a of the first side sill reinforcement 13 and the front end 14a of the second side sill reinforcement 14 via mounting bolts 161, 162, and 163, thereby strengthening the connection rigidity of the first side sill reinforcement 13 and the second side sill reinforcement 14.

[0055] The support frame 83 may include a plurality of transverse members 83a, 83b, 83c extending along the width direction of the vehicle, and a plurality of longitudinal members 83d, 83e extending along the length direction of the vehicle.

[0056] The multiple lateral members 83a, 83b, 83c may include a first lateral member 83a connected to the first side sill reinforcement 13, a second lateral member 83b connected to the second side sill reinforcement 14, and a third lateral member 83c connected to the rear end 13a of the first side sill reinforcement 13 and the front end 14a of the second side sill reinforcement 14. Each end of the first lateral member 83a may be connected to the first side sill reinforcement 13 of the corresponding side sill 10, each end of the second lateral member 83b may be connected to the second side sill reinforcement 14 of the corresponding side sill 10, and each end of the third lateral member 83c may be connected to the overlapping portion 15 between the first side sill reinforcement 13 and the second side sill reinforcement 14 of the corresponding side sill 10.

[0057] 10, a first through-pipe 171 may be embedded inside the first side sill reinforcement 13, and a first mounting bolt 161 may pass through a through-hole in the first horizontal member 83a and be screwed into the first through-pipe 171, thereby connecting each end of the first horizontal member 83a of the support frame 83 to the first side sill reinforcement 13. The first horizontal member 83a may have a first support protrusion 84a protruding from an upper surface thereof toward the side sill 10, and the first support protrusion 84a may be in direct contact with the side sill 10, thereby stably supporting the side sill 10 by the first support protrusion 84a.

[0058] 11, the second through-pipe 172 may be embedded inside the second side sill reinforcement 14, and the second mounting bolt 162 may pass through the through-hole of the second cross member 83b and be screwed into the second through-pipe 172, thereby connecting each end of the second cross member 83b of the support frame 83 to the second side sill reinforcement 14. The second cross member 83b may have a second support protrusion 84b protruding from its upper surface toward the side sill 10, and the second support protrusion 84b may be in direct contact with the side sill 10, thereby stably supporting the side sill 10 by the second support protrusion 84b.

[0059] 12 , the third through-pipe 173a may be embedded within the rear end 13a of the first side sill reinforcement 13, and the fourth through-pipe 173b may be embedded within the front end 14a of the second side sill reinforcement 14. The third mounting bolt 163 passes through the through-hole of the third cross member 83c and is screw-connected to both the third through-pipe 173a and the fourth through-pipe 173b, so that each end of the third cross member 83c of the support frame 83 may be connected to both the rear end 13a of the first side sill reinforcement 13 and the front end 14a of the second side sill reinforcement 14. The third cross member 83c may have a third support protrusion 84c protruding from its upper surface toward the side sill 10. The third support protrusion 84c directly contacts the side sill 10, so that the side sill 10 can be stably supported by the third support protrusion 84c.

[0060] The above description is merely an illustrative example of the technical concept of the present invention, and various modifications and variations can be made by a person having ordinary knowledge in the technical field to which the present invention pertains without departing from the essential characteristics of the present invention.

[0061] Therefore, the embodiments disclosed in the present invention are for illustrative purposes only and are not intended to limit the technical idea of ​​the present invention, and the scope of the technical idea of ​​the present invention should not be limited by such embodiments. The scope of protection of the present invention should be interpreted by the claims set forth below, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention. [Explanation of symbols]

[0062] 1. Body 2 Floor Assembly 3 Side structure 4 Front side area 5 Rear side area 10 Side sill 11 Inner side sill 12 Outer side sill 13 First side sill reinforcement 14 Second side sill reinforcement 15 Superimposed section 16 Roller guide track 50 battery assembly 51 Battery housing 53 Side Mount 61, 62, 63 Mounting bolts 71, 72, 73a, 73b Through pipes 81, 82 Hydrogen tank 83 Support Frame 83a, 83b, 83c horizontal members

Claims

1. a floor assembly having a center floor and a rear floor; a pair of side structures connected to opposite sides of the floor assembly; a pair of side sills connected to opposite sides of the floor assembly; Each side sill includes an inner side sill facing the interior of the vehicle, an outer side sill facing the exterior of the vehicle, and a first side sill reinforcing member and a second side sill reinforcing member disposed between the inner side sill and the outer side sill, a rear end of the first side sill reinforcement member overlaps a front end of the second side sill reinforcement member; the first side sill reinforcement has an incision limited to a rear end thereof; the incision extends along the length of the first side sill reinforcement; A vehicle body structure, wherein a front portion of the second side sill reinforcement is accommodated within the cutout of the first side sill reinforcement.

2. Each side structure has a front side region toward the front of the vehicle and a rear side region toward the rear of the vehicle; The vehicle body structure according to claim 1 , wherein the first side sill reinforcement is disposed at a lower end of the front side region, and the second side sill reinforcement is disposed at a lower end of the rear side region.

3. 2. The vehicle body structure according to claim 1, wherein the first side sill reinforcement is integrally connected to each side structure, and the second side sill reinforcement is integrally connected to the floor assembly.

4. further comprising a battery assembly disposed below the floor assembly; The battery assembly includes a battery housing and a pair of side mounts provided on both sides of the battery housing; The vehicle body structure according to claim 1 , wherein the battery assembly is connected to the first side sill reinforcement and the second side sill reinforcement via respective side mounts.

5. 5. The vehicle body structure according to claim 4, wherein each side mount of the battery assembly is commonly connected to a rear end of the first side sill reinforcement and a front end of the second side sill reinforcement via a mount bolt.

6. a first through pipe embedded in the first side sill reinforcement; The vehicle body structure according to claim 4 , further comprising: a first mount bolt passing through each of the side mounts and threadedly coupled to the first through pipe.

7. a second through pipe embedded in the second side sill reinforcement; The vehicle body structure according to claim 4 , further comprising: a second mount bolt passing through each of the side mounts and threadedly coupled to the second through pipe.

8. a third through-pipe embedded in a rear portion of the first side sill reinforcement; a fourth through pipe embedded in a front portion of the second side sill reinforcement; 5. The vehicle body structure according to claim 4, further comprising: a third mount bolt passing through each of the side mounts and threadedly coupled to both the third through pipe and the fourth through pipe.

9. further comprising a hydrogen tank disposed below the floor assembly; the hydrogen tank is connected to the first side sill reinforcement and the second side sill reinforcement via a support frame; 2. The vehicle body structure according to claim 1, wherein the support frame is commonly connected to a rear end of the first side sill reinforcement and a front end of the second side sill reinforcement via a mounting bolt.

10. 10. The vehicle body structure according to claim 9, wherein the support frame includes a first lateral member connected to the first side sill reinforcement, a second lateral member connected to the second side sill reinforcement, and a third lateral member connected in common to a rear portion of the first side sill reinforcement and a front portion of the second side sill reinforcement.

11. a first through pipe embedded in the first side sill reinforcement; The vehicle body structure according to claim 10, further comprising: a first mounting bolt that passes through the first transverse member and is threadedly coupled to the first through pipe.

12. a second through pipe embedded in the second side sill reinforcement; The vehicle body structure according to claim 10, further comprising: a second mounting bolt that passes through the second transverse member and is threadedly coupled to the second through pipe.

13. a third through-pipe embedded in a rear portion of the first side sill reinforcement; a fourth through pipe embedded in a front portion of the second side sill reinforcement; 11. The vehicle body structure according to claim 10, further comprising: a third mounting bolt that passes through the third transverse member and is threadedly coupled to both the third through pipe and the fourth through pipe.

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