Vehicle body structure

Abstract

The present invention relates to a vehicle body structure. The vehicle body of an embodiment includes: a rear cross member unit provided in a vehicle width direction and joined to front portions of a pair of rear side members provided at a rear portion of the vehicle body; a pair of side seal units joined to end portions of the rear cross member unit in a vehicle length direction, respectively; a front cross member unit joined to front portions of the pair of side seal units in the vehicle width direction; an upper cross member unit joined to upper portions of the pair of side seal units in the vehicle width direction; and a rear floor assembly connected to the rear cross member unit, the pair of side seal units, the front cross member unit, and the upper cross member unit.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of Korean Patent Application No. 10-2021-0094860, filed on July 20, 2021, which is incorporated herein by reference. Technical Field

[0003] This invention relates to a vehicle body structure. Background Technology

[0004] Generally speaking, so-called environmentally friendly vehicles, such as hybrid vehicles, electric vehicles, hybrid electric vehicles, and fuel cell electric vehicles (also known in the field as "hydrogen electric vehicles"), are equipped with high-voltage batteries that supply power to the drive electric motor.

[0005] For example, in the case of fuel cell electric vehicles, the high-voltage battery is typically mounted on the rear floor structure at the rear of the vehicle. Additionally, auxiliary components such as electric water pumps, cooling units (e.g., radiators), and hydrogen tanks are also mounted on the rear floor structure.

[0006] Recently, a supercar based on a fuel cell electric vehicle has been launched as a special-purpose vehicle.

[0007] However, it is difficult to install high-voltage batteries and various auxiliary components in such a fuel cell-electric supercar within the limited rear body space. Furthermore, the reduced structural rigidity could damage the high-voltage batteries in a lateral collision.

[0008] The information disclosed in this background section is intended only to enhance the understanding of the background of the invention, and therefore the information it may include does not constitute prior art known to those skilled in the art. Summary of the Invention

[0009] This invention relates to a vehicle body structure. A specific embodiment relates to a rear vehicle body structure capable of protecting a high-voltage battery.

[0010] An embodiment of the present invention provides a vehicle body structure that ensures better space for installing high-voltage batteries at the rear of the vehicle body.

[0011] The vehicle body structure according to the embodiment includes: a rear transverse member unit disposed in the vehicle width direction and joined to the front of a pair of rear longitudinal beams disposed at the rear of the vehicle body; a pair of side sealing units joined to the end portions of the rear transverse member unit in the vehicle length direction; a front transverse member unit joined to the front of the pair of side sealing units in the vehicle width direction; an upper transverse member unit joined to the upper portion of the pair of side sealing units in the vehicle width direction; and a rear floor assembly connected to the rear transverse member unit, the pair of side sealing units, the front transverse member unit, and the upper transverse member unit.

[0012] A dome-shaped battery mounting space can be formed in the rear base plate assembly.

[0013] The front transverse member unit can be located below the rear transverse member unit, and the upper transverse member unit can be located above the rear transverse member unit.

[0014] The vehicle body structure according to the implementation plan may further include a lower battery fixing unit and an upper battery fixing unit, wherein the lower battery fixing unit is disposed in the rear transverse member unit and the front transverse member unit, and the upper battery fixing unit is engaged with the inner upper surface of the rear floor assembly.

[0015] The rear transverse member unit may include a first rear transverse member, a second rear transverse member, and at least one partition plate. The first rear transverse member is engaged to the front portion of a pair of rear longitudinal beams, the second rear transverse member is engaged to the first rear transverse member to form a closed portion, and at least one partition plate is engaged in the closed portion to at least one of the first and second rear transverse members.

[0016] The front lateral member unit may include a first front lateral member, a second front lateral member, and an upper reinforcing member. The first front lateral member is engaged with the lower front portion of the first side sealing unit in a pair of side sealing units in the vehicle width direction. The second front lateral member is disposed at a predetermined distance from the first front lateral member and is engaged with the lower front portion of the second side sealing unit in a pair of side sealing units in the vehicle width direction. The upper reinforcing member is engaged with the upper surfaces of the first front lateral member and the second front lateral member, respectively.

[0017] The upper transverse member unit may include a first upper transverse member and a second upper transverse member. The first upper transverse member corresponds to the first front transverse member and is engaged with the upper front part of the first side sealing unit in the vehicle width direction. The second upper transverse member corresponds to the second front transverse member and is engaged with the upper front part of the second side sealing unit in the vehicle width direction, and is disposed at a predetermined distance from the first upper transverse member.

[0018] The upper transverse member unit may further include a third upper transverse member and at least one reinforcing connecting member, the third upper transverse member being disposed behind the first upper transverse member and the second upper transverse member and engaging with the upper part of a pair of side sealing units, and the at least one reinforcing connecting member connecting the third upper transverse member and the rear transverse member unit in the vehicle length direction and engaging with the rear floor assembly.

[0019] The spaced-apart end portions of the first and second front transverse members can be connected to each other by a channel member, and the channel member can be engaged to the rear bottom plate assembly.

[0020] The spaced-apart end portions of the first upper transverse member and the second upper transverse member can be connected to each other by a channel reinforcement member, and the channel reinforcement member can be engaged with the channel member.

[0021] The rear bottom plate assembly may include a rear bottom plate and a middle plate. The rear bottom plate is connected to a rear transverse member unit, a pair of side sealing units, a first upper transverse member, a second upper transverse member, and a third upper transverse member. The middle plate is connected to a first front transverse member and a first upper transverse member, connected to a second front transverse member and a second upper transverse member, connected to a pair of side sealing units, and engaged with the rear bottom plate.

[0022] Each of a pair of side sealing units may include a side sealing plate and an outer reinforcing plate, the side sealing plate being connected to a rear transverse member unit, a front transverse member unit and an upper transverse member unit, the outer reinforcing plate being engaged with the outer surface of the side sealing plate.

[0023] The lower battery fixing unit may include multiple welded bolts disposed in the rear transverse member unit and multiple welded nuts disposed in the front transverse member unit.

[0024] The rear transverse member unit, a pair of side sealing units, and the front transverse member unit can be formed as a battery mounting portion having a rectangular shape in the horizontal cross-section.

[0025] The upper battery mounting unit may include: a first mounting bracket connected to the upper transverse member unit in the vehicle width direction; a second mounting bracket configured to connect the rear transverse member unit and the upper transverse member unit in the vehicle length direction; and a third mounting bracket disposed on the opposite side of the second mounting bracket in the vehicle width direction and configured to connect the rear transverse member unit and the upper transverse member unit in the vehicle length direction.

[0026] The first mounting bracket, the second mounting bracket, and the third mounting bracket can be arranged in a triangular structure.

[0027] According to an embodiment of the present invention, space for installing a high-voltage battery can be ensured in the limited space at the rear of the vehicle, the structural rigidity of the rear floor structure can be increased, and damage to the high-voltage battery during a vehicle collision can be minimized.

[0028] In the detailed description of embodiments of the present invention, other effects that can be obtained or predicted by the exemplary embodiments will be described, either explicitly or implicitly. That is, various effects predicted according to the exemplary embodiments will be described in the following detailed description. Attached Figure Description

[0029] The embodiments described herein can be better understood by referring to the accompanying drawings, wherein the same reference numerals indicate the same or similarly functional elements.

[0030] Figures 1 to 4 This is a perspective view showing the vehicle body structure according to the implementation plan.

[0031] Figure 5 This is a bottom view showing the vehicle body structure according to the implementation plan.

[0032] Figure 6 This is a cross-sectional view showing the vehicle body structure according to the implementation scheme.

[0033] Figure 7A and Figure 7B A rear transverse member unit applied to a vehicle body structure according to an embodiment is shown.

[0034] Figure 8 A front transverse member unit applied to a vehicle body structure according to an embodiment is shown.

[0035] Figure 9A and Figure 9B A battery lower mounting unit is shown applied to a vehicle body structure according to the embodiment.

[0036] Figure 10A , Figure 10B and Figure 10C A battery mounting unit is shown applied to a vehicle body structure according to the embodiment.

[0037] It should be understood that the accompanying drawings cited above are not necessarily drawn to scale and present slightly simplified representations of various preferred features illustrating the basic principles of the invention. Specific design features of the invention, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the application and environment of use for a particular purpose.

[0038] The following description, in conjunction with the accompanying drawings, further explains the embodiments of the present invention.

[0039] 1: High-voltage battery; 3: Rear longitudinal beam

[0040] 5: Bolt fastening part; 6: Nut

[0041] 7: Nut fastening part 8: Bolt

[0042] 10: Rear transverse member unit; 11: First rear transverse member

[0043] 12: Second rear transverse member 13: Partition plate

[0044] 15: Closed section 20: Side sealing unit

[0045] 21: Side sealing plate; 23: External reinforcing plate

[0046] 30: Front transverse member unit; 31: First front transverse member

[0047] 32: Second front transverse member; 33: Upper reinforcing member

[0048] 41: Channel component 50: Upper transverse component unit

[0049] 51: First upper transverse member; 52: Second upper transverse member

[0050] 53: Third upper transverse member; 55: Reinforcing connecting member

[0051] 61: Channel reinforcement component; 70: Rear bottom plate assembly

[0052] 71: Battery installation space; 73: Rear bottom plate

[0053] 75: Intermediate plate; 80: Lower battery fixing unit

[0054] 81: Welding bolts 83: Welding nuts

[0055] 85: Fastening hole; 87: Battery mounting section

[0056] 90: Upper battery fixing unit; 91: First mounting bracket

[0057] 92: Second mounting bracket 93: Third mounting bracket

[0058] LP1: First load path; LP2: Second load path

[0059] LP3: Third load path; LP4: Fourth load path

[0060] 100: Body structure 101: Auxiliary components. Detailed Implementation

[0061] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. As used herein, the terms “comprising” and / or “including” mean the presence of a specific feature, integer, step, operation, element, and / or component, but should be understood to not exclude the presence or addition of one or more other features, integers, steps, operations, components, and / or combinations thereof. As used herein, the term “and / or” includes any or all combinations of one or more related items. The term “joint” indicates a physical relationship between two components, wherein the components are directly connected to each other or indirectly connected through one or more intermediate components.

[0062] The terms “vehicle,” “of a vehicle,” “automobile,” or other similar terms used in this article are generally used to cover a variety of vehicles, such as passenger cars, including sports cars, sports utility vehicles (SUVs), buses, trucks, commercial vehicles, etc., and to cover hybrid vehicles, electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and other alternative fuel vehicles (i.e., vehicles powered by fuels derived from non-petroleum energy sources).

[0063] In the following, embodiments of the invention will be described in detail with reference to the accompanying drawings.

[0064] Figures 1 to 4 This is a perspective view showing the vehicle body structure according to the implementation plan. Figure 5 This is a bottom view showing the vehicle body structure according to the implementation scheme. Figure 6 This is a cross-sectional view showing the vehicle body structure according to the implementation scheme.

[0065] refer to Figures 1 to 6 The body structure 100 according to the implementation plan can be applied to the body of electric vehicles, and can also be applied to supercars based on hydrogen electric vehicles.

[0066] In one example, the supercar could be configured as a two-seater with a driver's seat and a passenger seat, and could be equipped with a high-voltage battery 1 in the rear of the vehicle (reference). Figure 6 This supplies power to the drive motor. Additionally, the rear of the vehicle body can be configured to mount auxiliary components 101, such as an electric water pump, radiator, and hydrogen tank.

[0067] It is understood that the supercar equipped with a high-voltage battery 1 based on a hydrogen electric vehicle is merely an example, and the scope of the invention is not limited thereto.

[0068] The embodiments of the present invention can be applied to the body of a general environmentally friendly vehicle equipped with a high-voltage battery 1, such as a hybrid vehicle, an electric vehicle, a hybrid electric vehicle, or a hydrogen electric vehicle (e.g., a fuel cell electric vehicle).

[0069] In this specification, the term "vehicle length direction" may refer to the length direction of the vehicle body, the term "vehicle width direction" may refer to the lateral direction of the vehicle body, and the term "vertical direction" may refer to the height direction of the vehicle body.

[0070] Additionally, in this specification, the term "inner surface" of a component may refer to a surface facing the interior space formed by the component (e.g., the interior space of a driver's cab), and the term "outer surface" may refer to a surface of a component opposite to the inner surface. Alternatively, the term "inner surface" of a component may refer to a surface of one component facing another component (spaced apart from one component but facing that component), and the term "outer surface" of a component may refer to a surface of one component opposite to another component.

[0071] Furthermore, in this specification, the terms "upper end", "upper part", "upper end" or "upper surface" of a component refer to the end portion, part, end or surface of the component that is in a higher position relative to the drawing, and the terms "lower end", "lower part", "lower end" or "lower surface" of a component refer to the end portion, part, end or surface of the component that is in a lower position relative to the drawing.

[0072] In addition, in this specification, the term "end" (e.g., one end, the other end, etc.) of a component refers to the end of the component in any direction, and "end" (e.g., one end, the other end, etc.) refers to a portion of the component that includes the end.

[0073] Meanwhile, the vehicle body structure 100 according to the implementation plan can be specifically applied to the rear floor structure of the rear of the vehicle body, which is capable of installing the high-voltage battery 1 and various auxiliary components 101.

[0074] As described above, the vehicle body structure 100 according to an embodiment of the present invention can provide a rear floor structure that can ensure space for installing the high-voltage battery 1 in the limited space at the rear of the vehicle body.

[0075] In addition, the vehicle body structure 100 according to the implementation plan provides a rear floor structure that can increase the structural rigidity of the rear of the vehicle body and protect the high-voltage battery 1 from vehicle collisions.

[0076] Therefore, the vehicle body structure 100 according to the implementation plan basically includes a rear transverse member unit 10, a pair of side sealing units 20, a front transverse member unit 30, an upper transverse member unit 50, a rear floor assembly 70, a lower battery fixing unit 80, and an upper battery fixing unit 90.

[0077] In one embodiment, the rear transverse member unit 10 is disposed in the vehicle width direction and engages with the front of a pair of rear longitudinal beams 3 disposed in the vehicle length direction at the rear of the vehicle body.

[0078] like Figure 7Aand Figure 7B As shown, the rear transverse member unit 10 includes a first rear transverse member 11, a second rear transverse member 12, and at least one partition 13.

[0079] The first rear transverse member 11 is disposed in the vehicle width direction and engages with the front of a pair of rear longitudinal beams 3. The first rear transverse member 11 may be formed with a curved cross-section having a predetermined shape.

[0080] The second rear transverse member 12 is disposed in front of the first rear transverse member 11 in the vehicle width direction and is engaged with the first rear transverse member 11. The second rear transverse member 12 may be formed with a curved cross-section having a predetermined shape.

[0081] A closed portion 15 corresponding to the curved cross section is formed between the first rear transverse member 11 and the second rear transverse member 12.

[0082] Here, a first load path LP1 connected to a pair of side sealing units 20 is formed in the vehicle width direction through the first rear lateral member 11 and the second rear lateral member 12.

[0083] To enhance the rigidity of the rear lateral member unit 10, at least one partition 13 is joined to the first rear lateral member 11 and the second rear lateral member 12 in a closed portion 15 formed by the first rear lateral member 11 and the second rear lateral member 12. For example, multiple partitions 13 may be provided, and the multiple partitions 13 may be arranged separately from each other in the closed portion 15 along the vehicle width direction.

[0084] In one embodiment, the side portions of the rear floor structure are formed by a pair of side sealing units 20. The pair of side sealing units 20 are respectively engaged to the two end portions of the rear transverse member unit 10 in the vehicle length direction.

[0085] In this invention, a pair of side sealing units 20 includes a first side sealing unit 20 corresponding to a first side (e.g., the left side) of the rear lateral member unit 10 and a second side sealing unit 20 corresponding to a second side (e.g., the right side) of the rear lateral member unit 10. The pair of side sealing units 20 are arranged to face each other in the vehicle width direction.

[0086] Each of the pair of side sealing units 20 includes at least one side sealing plate 21 and at least one external reinforcing plate 23.

[0087] The side sealing plate 21 is connected to both sides of the rear transverse member unit 10. The outer reinforcing plate 23 is joined to the outer surface of the side sealing plate 21.

[0088] In one embodiment, the front lateral member unit 30 is disposed on the front side of the rear lateral member unit 10 and engages with the front portion of a pair of side sealing units 20 in the vehicle width direction. In one example, the front lateral member unit 30 may be located below the rear lateral member unit 10.

[0089] The front transverse member unit 30 includes a first front transverse member 31, a second front transverse member 32, and at least one upper reinforcing member 33 (e.g., Figure 8 (As shown).

[0090] The first front transverse member 31 is engaged with the lower front portion of the first side sealing unit 20 in the vehicle width direction. The first front transverse member 31 is connected to the inner surface of the side sealing plate 21 in the first side sealing unit 20.

[0091] The second front transverse member 32 is joined to the lower front portion of the second side sealing unit 20 at a predetermined distance from the first front transverse member 31 in the vehicle width direction. The second front transverse member 32 is connected to the inner surface of the side sealing plate 21 in the second side sealing unit 20.

[0092] Here, the corresponding spaced-apart end portions of the first front transverse member 31 and the second front transverse member 32 can be connected to each other through the channel member 41.

[0093] The channel member 41 is disposed between the spaced-apart end portions of the first front transverse member 31 and the second front transverse member 32, connecting the second load path LP2 of the first front transverse member 31 and the second front transverse member 32, and allowing components such as wires connected to the high-voltage battery 1 to pass through.

[0094] The upper reinforcing member 33 is configured to enhance the rigidity of the front transverse member unit 30. The upper reinforcing member 33 is respectively joined to the upper surfaces of the first front transverse member 31 and the second front transverse member 32.

[0095] In one embodiment, the upper lateral member unit 50 is engaged with the upper portion of a pair of side sealing units 20 in the vehicle width direction. The upper lateral member unit 50 may be located above the rear lateral member unit 10.

[0096] The upper transverse member unit 50 includes a first upper transverse member 51, a second upper transverse member 52, a third upper transverse member 53, and at least one reinforcing connecting member 55.

[0097] The first upper transverse member 51 corresponds to the first front transverse member 31 and engages with the upper front portion of the first side sealing unit 20 in the vehicle width direction. The first upper transverse member 51 is connected to the upper surface of the side sealing plate 21 in the first side sealing unit 20.

[0098] The second upper transverse member 52 corresponds to the second front transverse member 32 and engages with the upper front portion of the second side sealing unit 20 in the vehicle width direction. The second upper transverse member 52 is connected to the upper surface of the side sealing plate 21 in the second side sealing unit 20. The second upper transverse member 52 is disposed at a predetermined distance from the first upper transverse member 51.

[0099] Here, the corresponding spaced-apart end portions of the first upper transverse member 51 and the second upper transverse member 52 can be connected to each other by the channel reinforcement member 61. The channel reinforcement member 61 is engaged with the upper surface of the channel member 41.

[0100] The channel reinforcement member 61 is disposed between the first upper transverse member 51 and the second upper transverse member 52, and is configured to connect the first upper transverse member 51 and the second upper transverse member 52 to form a third load path LP3 and to strengthen the rigidity of the channel member 41.

[0101] The third upper transverse member 53 is disposed on the rear side of the first upper transverse member 51 and the second upper transverse member 52 in the vehicle width direction, and is engaged with the upper part of a pair of side sealing units 20.

[0102] Here, the third upper transverse member 53 is configured to form a fourth load path LP4 connecting the upper part of the first side sealing unit 20 and the upper part of the second side sealing unit 20.

[0103] The reinforcing connecting member 55 is configured to connect the third upper transverse member 53 and the rear transverse member unit 10 in the vehicle length direction and to enhance the rigidity of the third upper transverse member 53 and the rear transverse member unit 10.

[0104] The reinforcing connecting member 55 is connected to the third upper transverse member 53 and the second rear transverse member 12 of the rear transverse member unit 10. In one example, multiple reinforcing connecting members 55 are provided, and the multiple reinforcing connecting members 55 can be configured to be spaced apart from each other at a preset interval along the vehicle width direction.

[0105] In one embodiment, the rear floor assembly 70 is configured to form a rear floor structure in the rear of the vehicle body.

[0106] The rear bottom plate assembly 70 is connected to the rear transverse member unit 10, a pair of side sealing units 20, the front transverse member unit 30, and the upper transverse member unit 50.

[0107] In addition, the rear bottom plate assembly 70 can be connected to the upper surface of the second rear transverse member 12, the upper surfaces of the first front transverse member 31 and the second front transverse member 32, the upper and inner surfaces of the side sealing plate 21, and the lower surfaces of the first upper transverse member 51, the second upper transverse member 52 and the third upper transverse member 53.

[0108] In the rear base plate assembly 70, the rear transverse member unit 10, a pair of side sealing units 20, the front transverse member unit 30, and the upper transverse member unit 50 can be formed as a battery mounting space 71 with a dome shape in the vertical cross-section (see reference). Figure 6 ).

[0109] The rear floor assembly 70 includes at least one rear floor 73 and at least one intermediate floor 75.

[0110] The rear bottom plate 73 is connected to the upper surface of the second rear transverse member 12, the upper surface of the side sealing plate 21, and the lower surfaces of the first upper transverse member 51, the second upper transverse member 52, and the third upper transverse member 53.

[0111] In addition, the rear base plate 73 can be connected to the lower surface of the reinforcing connection member 55 and to the channel reinforcing member 61.

[0112] The intermediate plate 75 is configured to connect the rear floor plate 73 and the front floor structure (not shown) in the front of the vehicle body.

[0113] The intermediate plate 75 is connected to the upper surface of the first front transverse member 31 and the lower surface of the first upper transverse member 51, which are corresponding to each other. The intermediate plate 75 is also connected to the upper surface of the second front transverse member 32 and the lower surface of the second upper transverse member 52, which are corresponding to each other.

[0114] Furthermore, the intermediate plate 75 is connected to the inner surface of the side sealing plate 21 and is joined to the rear bottom plate 73. Additionally, the intermediate plate 75 can be connected to the channel member 41 and the channel reinforcement member 61.

[0115] In one embodiment, the lower battery fixing unit 80 is configured to fix the lower part of the high-voltage battery 1 disposed in the battery mounting space 71 of the rear base plate assembly 70 to the rear transverse member unit 10 and the front transverse member unit 30.

[0116] The lower battery fixing unit 80 is disposed in the rear transverse member unit 10 and the front transverse member unit 30. For example... Figure 9A and Figure 9B As shown, the lower battery fixing unit 80 includes multiple welding bolts 81 and multiple welding nuts 83.

[0117] A plurality of welding bolts 81 are disposed on the lower surface of the first rear transverse member 11 of the rear transverse member unit 10. The plurality of welding bolts 81 are engaged (e.g., welded) to the lower surface of the first rear transverse member 11 and extend vertically at the lower surface.

[0118] Multiple welding bolts 81 can be inserted into multiple bolt fastening parts 5 located in the high-voltage battery 1 (reference). Figure 6 It can be engaged with multiple nuts 6.

[0119] Multiple weld nuts 83 are disposed on the lower surfaces of the first front transverse member 31 and the second front transverse member 32 of the front transverse member unit 30.

[0120] Multiple weld nuts 83 are engaged (e.g., welded) to the inner surfaces of the first front transverse member 31 and the second front transverse member 32, and connected to multiple fastening holes 85 formed in the lower surfaces of the first front transverse member 31 and the second front transverse member 32.

[0121] Multiple welded nuts 83 can be inserted into multiple nut fastening parts 7 provided in the high-voltage battery 1 (reference). Figure 6 It can be connected to multiple bolts 8.

[0122] Here, the first rear transverse member 11, the pair of side sealing units 20, and the first front transverse member 31 and the second front transverse member 32 can be formed as a battery mounting portion 87 having a rectangular shape in the horizontal cross-section (i.e., a rectangular shape when projected onto a horizontal surface), wherein the high-voltage battery 1 can be mounted by a plurality of welded bolts 81 and a plurality of welded nuts 83 (see [link to documentation]). Figure 5 ).

[0123] In one embodiment, the upper battery fixing unit 90 is configured to fix the upper part of the high-voltage battery 1, which is disposed in the battery mounting space 71 of the rear base plate assembly 70, to the upper transverse member unit 50.

[0124] The upper battery mounting unit 90 is attached to the inner upper surface of the rear base plate assembly 70. Here, "inner" refers to the downwardly open internal area of ​​the rear base plate assembly 70. Figure 10A , Figure 10B ,and Figure 10C As shown, the upper battery fixing unit 90 includes a first mounting bracket 91, a second mounting bracket 92, and a third mounting bracket 93.

[0125] The first mounting bracket 91 is configured to fix the upper part of the high-voltage battery 1 to the upper transverse member unit 50.

[0126] The first mounting bracket 91 is connected to the upper transverse member unit 50 in the vehicle width direction. The first mounting bracket 91 can engage with the lower surface of the rear floor plate 73 and can be connected to the spaced-apart end portions of the first upper transverse member 51 and the second upper transverse member 52 (see reference). Figure 10A ).

[0127] The second mounting bracket 92 is configured to secure the other side of the upper part of the high-voltage battery 1 to the rear transverse member unit 10 and the upper transverse member unit 50.

[0128] The second mounting bracket 92 connects the rear transverse member unit 10 and the upper transverse member unit 50 in the vehicle length direction. The second mounting bracket 92 can engage with the lower surface of the rear floor plate 73 and can be connected via two end portions to the second rear transverse member 12 and the third upper transverse member 53 (see reference). Figure 10B ).

[0129] In addition, the third mounting bracket 93 is configured to still fix the other side of the upper part of the high voltage battery 1 to the rear transverse member unit 10 and the upper transverse member unit 50.

[0130] Additionally, the third mounting bracket 93 connects the rear transverse member unit 10 and the upper transverse member unit 50 along the vehicle's length. The third mounting bracket 93 can engage with the lower surface of the rear floor plate 73 and can be connected via two end portions to the second rear transverse member 12 and the third upper transverse member 53 (see reference). Figure 10C Here, the second mounting bracket 92 and the third mounting bracket 93 are arranged opposite to each other in the vehicle width direction, and the connection rigidity between the rear transverse member unit 10 and the upper transverse member unit 50 can be ensured.

[0131] Here, when viewed from below the rear base plate assembly 70, the first mounting bracket 91, the second mounting bracket 92, and the third mounting bracket 93 of the upper battery fixing unit 90 can be arranged in a triangular structure 95.

[0132] In the following text, see references Figures 1 to 10C The operation of the vehicle body structure 100 according to the implementation plan is described in detail.

[0133] First, the rear base plate assembly 70 is connected to the rear transverse member unit 10, a pair of side sealing units 20, the front transverse member unit 30 and the upper transverse member unit 50, and forms a dome shape in the battery mounting space 71.

[0134] The first rear lateral member 11 and the second rear lateral member 12 of the rear lateral member unit 10 are connected to a pair of side sealing units 20 and form a first load path LP1 in the vehicle width direction.

[0135] The first front lateral member 31 and the second front lateral member 32 of the front lateral member unit 30 are connected to a pair of side sealing units 20 and channel members 41, and form a second load path LP2 in the vehicle width direction.

[0136] In addition, the upper reinforcing member 33 is joined to the upper surface of the first front transverse member 31 and the second front transverse member 32, and strengthens the rigidity of the first front transverse member 31 and the second front transverse member 32.

[0137] The first upper transverse member 51 and the second upper transverse member 52 of the upper transverse member unit 50 are connected to a pair of side sealing units 20 and channel reinforcing members 61, and form a third load path LP3 in the vehicle width direction. The third upper transverse member 53 of the upper transverse member unit 50 is connected to a pair of side sealing units 20, and forms a fourth load path LP4 in the vehicle width direction.

[0138] The channel reinforcement member 61 strengthens the rigidity of the first upper transverse member 51 and the second upper transverse member 52, and strengthens the rigidity of the channel member 41 that is joined to the rear bottom plate assembly 70.

[0139] Furthermore, the third upper lateral member 53 and the second rear lateral member 12 are connected in the vehicle length direction by a reinforcing connecting member 55. The reinforcing connecting member 55 enhances the rigidity of the third upper lateral member 53 and the second rear lateral member 12.

[0140] Meanwhile, the high-voltage battery 1 can be installed into the battery mounting space 71 of the rear base plate assembly 70 through the lower battery fixing unit 80 and the upper battery fixing unit 90.

[0141] The lower part of the high-voltage battery 1 can be fixed to the rear transverse member unit 10 and the front transverse member unit 30 via the battery lower fixing unit 80. The lower part of the high-voltage battery 1 can be engaged with a plurality of welded bolts 81 provided on the lower surface of the first rear transverse member 11. In addition, the lower part of the high-voltage battery 1 can be engaged with a plurality of welded nuts 83 provided on the lower surfaces of the first front transverse member 31 and the second front transverse member 32.

[0142] Here, the lower part of the high-voltage battery 1 can be engaged with a plurality of welded bolts 81 and a plurality of welded nuts 83 in a rectangular battery mounting portion 87 defined by a first rear transverse member 11, a pair of side sealing units 20, and a first front transverse member 31 and a second front transverse member 32.

[0143] In addition, the upper part of the high-voltage battery 1 is fixed to the rear transverse member unit 10 and the upper transverse member unit 50 through the battery upper fixing unit 90 passing through the inner upper surface of the rear base plate assembly 70.

[0144] The upper part of the high-voltage battery 1 can be engaged with the first mounting bracket 91, the second mounting bracket 92 and the third mounting bracket 93 connected to the second rear transverse member 12 and the first upper transverse member 51, the second upper transverse member 52 and the third upper transverse member 53.

[0145] The first mounting bracket 91, the second mounting bracket 92, and the third mounting bracket 93 are arranged in a triangular structure 95 to fix the upper part of the high-voltage battery 1 and to strengthen the rigidity of the rear transverse member unit 10 and the upper transverse member unit 50.

[0146] On the other hand, auxiliary components 101, such as electric water pumps, radiators and hydrogen tanks, are installed on the upper surface of the upper transverse member unit 50 and the upper surface of the rear bottom plate assembly 70.

[0147] Therefore, the vehicle body structure 100 according to the implementation plan can ensure space for installing the high-voltage battery 1 in the limited space of the rear floor structure at the rear of the vehicle body.

[0148] Furthermore, the vehicle body structure 100 according to the implementation plan can increase the structural rigidity of the rear floor structure, strengthen the connection performance of the components, and suppress the torsional deformation of the rear floor structure.

[0149] Furthermore, in the event of a lateral collision, the vehicle body structure 100 according to the implementation plan can disperse the collision impact through the first load path LP1, the second load path LP2, the third load path LP3 and the fourth load path LP4.

[0150] Therefore, in one embodiment, damage to the high-voltage battery 1 and injury to the occupants due to torsional deformation of a pair of side sealing units 20 during a lateral collision of the vehicle can be minimized.

[0151] While embodiments of the invention have been described in conjunction with what are now considered practical exemplary embodiments, it should be understood that the invention is not limited to the disclosed embodiments. Rather, it is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A vehicle body structure, comprising: The rear transverse member unit is positioned in the vehicle width direction and joins to the front of a pair of rear longitudinal beams located at the rear of the vehicle body; A pair of side sealing units, which are respectively joined to the end portions of the rear transverse member unit in the vehicle length direction, wherein the rear transverse member unit is located between the rear longitudinal beam and the side sealing units in the vehicle length direction; A front transverse member unit that joins to the front of a pair of side sealing units in the vehicle width direction; The upper transverse member unit, which joins to the upper part of a pair of side sealing units in the vehicle width direction; and The rear bottom plate assembly is directly connected to the upper surface of the rear transverse member unit, the upper and inner surfaces of a pair of side sealing units, the upper surface of the front transverse member unit, and the lower surface of the upper transverse member unit. Among them, the front transverse component unit is located below the rear transverse component unit, and the upper transverse component unit is located above the rear transverse component unit.

2. The vehicle body structure according to claim 1, further comprising a battery mounting space having a dome shape in the rear floor assembly.

3. The vehicle body structure according to claim 1, wherein, Each of the pair of side sealing units includes: Side sealing plate, which is connected to the rear transverse member unit, the front transverse member unit, and the upper transverse member unit; and An external reinforcing plate is attached to the outer surface of the side sealing plate.

4. The vehicle body structure according to claim 1, wherein, The rear transverse member unit includes: The first rear transverse member is joined to the front of a pair of rear longitudinal beams; The second rear transverse member, which engages with the first rear transverse member to form a closed portion; and At least one partition is engaged in the closed portion to a first rear transverse member or a second rear transverse member.

5. A vehicle body structure, comprising: The rear transverse member unit is positioned in the vehicle width direction and joins to the front of a pair of rear longitudinal beams located at the rear of the vehicle body; A pair of side sealing units, which are respectively joined to the end portions of the rear transverse member unit in the vehicle length direction; A front transverse member unit, which engages with the front portion of a pair of side sealing units in the vehicle width direction, the front transverse member unit comprising: A first front transverse member, which engages in the vehicle width direction with the front lower part of the first side sealing unit of a pair of side sealing units; A second front transverse member is disposed at a predetermined distance from the first front transverse member and engages, in the vehicle width direction, the lower front portion of the second side sealing unit of a pair of side sealing units; and The upper reinforcing members are respectively joined to the upper surfaces of the first front transverse member and the second front transverse member; The upper transverse member unit, which joins to the upper part of a pair of side sealing units in the vehicle width direction; and The rear base plate assembly is directly connected to the upper surface of the rear transverse member unit, the upper and inner surfaces of a pair of side sealing units, the upper surface of the front transverse member unit, and the lower surface of the upper transverse member unit.

6. The vehicle body structure according to claim 5, wherein, The upper transverse component unit includes: A first upper transverse member, corresponding to a first front transverse member, and engaging with the upper front portion of a first side sealing unit in the vehicle width direction; and The second upper transverse member, which corresponds to the second front transverse member, is joined to the upper front part of the second side sealing unit in the vehicle width direction and is disposed at a predetermined distance from the first upper transverse member.

7. The vehicle body structure according to claim 6, wherein, The upper transverse member unit further includes: A third upper transverse member is disposed behind the first and second upper transverse members and engages with the upper part of a pair of side sealing units; and At least one reinforcing connecting member connects the third upper transverse member and the rear transverse member unit in the vehicle length direction and engages with the rear floor assembly.

8. The vehicle body structure according to claim 7, wherein, The rear base plate assembly includes: Rear bottom plate, which is connected to a rear transverse member unit, a pair of side sealing units, a first upper transverse member, a second upper transverse member, and a third upper transverse member; and The intermediate plate is connected to the first front transverse member and the first upper transverse member, connected to the second front transverse member and the second upper transverse member, connected to a pair of side sealing units, and joined to the rear bottom plate.

9. The vehicle body structure according to claim 6, wherein: The spaced-apart end portions of the first and second front transverse members are connected to each other by a channel member. The channel component is joined to the rear base plate assembly.

10. The vehicle body structure according to claim 9, wherein: The spaced-apart end portions of the first upper transverse member and the second upper transverse member are connected to each other by channel reinforcing members; The channel reinforcement member is joined to the channel member.

11. The vehicle body structure of claim 6, further comprising a battery mounting space having a dome shape in the rear floor assembly.

12. The vehicle body structure according to claim 6, wherein: The front transverse member unit is located below the rear transverse member unit; The upper transverse component unit is located above the rear transverse component unit.

13. A vehicle body structure, comprising: The rear transverse member unit is positioned in the vehicle width direction and joins to the front of a pair of rear longitudinal beams located at the rear of the vehicle body; A pair of side sealing units, which are respectively joined to the end portions of the rear transverse member unit in the vehicle length direction; A front transverse member unit that joins to the front of a pair of side sealing units in the vehicle width direction; The upper transverse component unit is joined to the upper part of a pair of side sealing units in the vehicle width direction; The rear bottom plate assembly is directly connected to the upper surface of the rear transverse member unit, the upper and inner surfaces of a pair of side sealing units, the upper surface of the front transverse member unit, and the lower surface of the upper transverse member unit. A lower battery fixing unit, which is disposed within the rear transverse member unit and the front transverse member unit; and The upper battery mounting unit is attached to the inner upper surface of the rear base plate assembly.

14. The vehicle body structure according to claim 13, wherein, The lower battery fixing unit includes: Multiple welded bolts are provided in the rear transverse member unit; and Multiple welded nuts are provided in the front transverse member unit.

15. The vehicle body structure according to claim 14, wherein, The rear transverse member unit, a pair of side sealing units, and the front transverse member unit are formed into a battery mounting portion having a rectangular shape in the horizontal cross-section.

16. The vehicle body structure according to claim 13, wherein, The upper battery fixing unit includes: The first mounting bracket is connected to the upper transverse member unit in the vehicle width direction; A second mounting bracket connects the rear transverse member unit and the upper transverse member unit along the vehicle's length direction; and The third mounting bracket is positioned on the opposite side of the second mounting bracket in the vehicle width direction and connects the rear transverse member unit and the upper transverse member unit in the vehicle length direction.

17. The vehicle body structure according to claim 16, wherein, The first mounting bracket, the second mounting bracket, and the third mounting bracket are arranged in a triangular structure.

18. The vehicle body structure according to claim 13, wherein, The upper transverse component unit includes: The first upper transverse member corresponds to the first front transverse member and is joined to the upper front part of the first side sealing unit of a pair of side sealing units in the vehicle width direction; The second upper transverse member, which corresponds to the second front transverse member, is joined to the upper front part of the second side sealing unit of a pair of side sealing units in the vehicle width direction, and is disposed at a predetermined distance from the first upper transverse member; A third upper transverse member is disposed behind the first and second upper transverse members and engages with the upper part of a pair of side sealing units; and At least one reinforcing connecting member connects the third upper transverse member and the rear transverse member unit in the vehicle length direction and engages with the rear floor assembly.

19. The vehicle body structure according to claim 18, wherein, The rear base plate assembly includes: Rear bottom plate, which is connected to a rear transverse member unit, a pair of side sealing units, a first upper transverse member, a second upper transverse member, and a third upper transverse member; and The intermediate plate is connected to the first front transverse member and the first upper transverse member, connected to the second front transverse member and the second upper transverse member, connected to a pair of side sealing units, and joined to the rear bottom plate.

Images