Threshold beam structure for electric vehicle

Abstract

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

Description

[0001] Cross-application of related applications This application claims priority and benefit to Korean Patent Application No. 10-2024-0154059, filed with the Korean Intellectual Property Office on November 4, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to a side sill structure for electric vehicles. Background Technology

[0003] In recent years, the use of electric vehicles powered by electric sources has been increasing due to environmental regulations and fuel efficiency regulations.

[0004] Electric vehicles are equipped with battery packs that power the electric drive system. In one example, the battery packs are installed under the floor structure of the electric vehicle body.

[0005] For electric vehicles, the main factor affecting driving range (or distance) is the volume ratio of the battery pack. The more battery cells that can be installed within the limited space of the battery pack, the longer the driving range of the electric vehicle.

[0006] Components with overlapping mechanical strength between the vehicle body and the battery assembly (e.g., side components of the battery assembly that connect to the vehicle body) and battery mounting components of the battery assembly may result in a reduction in the battery volume percentage.

[0007] On the other hand, with the continuous growth in demand for electric vehicles in recent years, there is a need to develop vehicle bodies that can meet collision performance requirements. In particular, there is a need to develop vehicle bodies that can protect the battery packs in the event of a side collision with an electric vehicle.

[0008] The information contained in this background section is intended to facilitate an understanding of the background of the invention and may include content from conventional techniques that are not publicly available, usable, or in use. Summary of the Invention

[0009] This invention relates to a body structure for electric vehicles, and more specifically, to a sill beam structure for electric vehicles with improved side-impact performance.

[0010] Embodiments of the present invention can provide a sill beam structure for electric vehicles that can minimize the rotation of the sill beam and reduce the impact energy transferred to the battery pack in the event of a side collision with the electric vehicle.

[0011] A sill beam structure for an electric vehicle according to an embodiment of the present invention may include: an inner sill plate connected to both sides of a floor structure in the vehicle width direction and arranged along the front-rear direction of the vehicle body; an upper reinforcement connected to the outer side of the inner sill plate and arranged along the front-rear direction of the vehicle body; a lower reinforcement connected to the lower surface of the upper reinforcement and the outer side of the inner sill plate and arranged along the front-rear direction of the vehicle body; and an outer sill plate connected to the outer side of the inner sill plate and the upper reinforcement and arranged along the front-rear direction of the vehicle body.

[0012] The floor panels and crossbeams installed in the floor structure can be connected to the inner side of the door sill inner panel on both sides in the vehicle width direction.

[0013] The crossbeam and upper reinforcement can be located on a first imaginary line along the width of the vehicle.

[0014] The inner sill plate can be connected to the side frames on both sides of the battery assembly installed under the floor structure.

[0015] The side of the upper reinforcing member connected to the outer side of the inner sill plate and the side of the side frame can be arranged on a second imaginary line in the vertical direction.

[0016] The section from the side of the upper reinforcement and the side frame to the outer sill plate can be set as a transition section.

[0017] The upper reinforcement may include an aluminum extrusion.

[0018] Aluminum extrusions may include multiple closed sections separated by at least one partition rib.

[0019] The lower reinforcement may include multiple unit components connected sequentially along the front-rear direction of the vehicle body.

[0020] The lower reinforcement can be formed in a honeycomb shape by multiple unit components along the front-rear direction of the vehicle body.

[0021] The unit assembly may include: an upper unit body made of steel, which is connected to the lower surface of the upper reinforcement; and a lower unit body made of steel, which is connected to the lower part of the upper unit body and to the outer side of the inner sill plate.

[0022] The cross-section of the upper unit can be M-shaped.

[0023] The cross-section of the lower unit can be U-shaped.

[0024] The upper unit may include: an upper molding portion that is recessed from the top to the bottom; an upper connecting portion that extends forward and backward from the upper molding portion and connects to the lower surface of the upper reinforcing member; and upper ribs that extend downward from the upper connecting portion.

[0025] The lower unit may include: a lower connecting portion that runs along the front-rear direction of the vehicle body and connects to the outer side of the inner sill plate; and a lower rib that extends upward from both sides of the lower connecting portion.

[0026] The upper and lower ribs of each unit component can be connected by welding.

[0027] The upper and lower ribs of adjacent unit components along the front-rear direction of the vehicle body can be connected by welding.

[0028] A welded nut that runs vertically through the inner sill plate and the lower unit can be connected to the inner sill plate.

[0029] Using the sill beam structure for electric vehicles according to an embodiment of the present invention, the rotation of the sill beam caused by side collisions can be minimized, thereby safely protecting the battery assembly and improving the battery integration and volume ratio of the battery assembly.

[0030] Advantages that can be obtained or anticipated through the implementation methods have been disclosed directly or implicitly in the specific embodiments. That is, various advantages predicted according to embodiments of the present invention will be disclosed in the following detailed description. Attached Figure Description

[0031] The embodiments of this specification can be better understood by referring to the following description in conjunction with the accompanying drawings, wherein similar reference numerals may denote the same or functionally similar elements.

[0032] Figure 1 This is a top plan view showing a sill beam structure for an electric vehicle according to an embodiment of the present invention.

[0033] Figure 2 This is a partially exploded perspective view showing a sill beam structure for an electric vehicle according to an embodiment of the present invention.

[0034] Figure 3 This is an exploded perspective view showing a sill beam structure for an electric vehicle according to an embodiment of the present invention.

[0035] Figure 4 This is a perspective view showing a sill beam structure for an electric vehicle according to an embodiment of the present invention.

[0036] Figure 5 It is along Figure 1 A cross-sectional view of the BB line in the diagram.

[0037] Figure 6 This is an assembled perspective view showing the lower reinforcement member of a sill beam structure applied to an electric vehicle according to an embodiment of the present invention.

[0038] Figure 7This is an exploded perspective view showing a unit assembly of a lower reinforcing member of a sill beam structure applied to an electric vehicle according to an embodiment of the present invention.

[0039] Figure 8 This is a cross-sectional view showing a battery pack mounting structure for a sill beam structure for an electric vehicle according to an embodiment of the present invention.

[0040] Figure 9 This is a view used to explain the operation of a sill beam structure for an electric vehicle according to an embodiment of the present invention.

[0041] Figure 10 This is a view showing an example in comparison with a sill beam structure for an electric vehicle according to an embodiment of the present invention.

[0042] The accompanying drawings are not necessarily drawn to scale and are intended to present various features of some of the basic principles of embodiments of the present invention in a relatively simplified form. For example, certain design features of embodiments of the present invention, including specific dimensions, orientations, positions, and shapes, may depend in part on the specific intended application and usage environment. Detailed Implementation

[0043] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can readily implement the embodiments of the present invention. Those skilled in the art will understand that the embodiments can be modified in various ways without departing from the spirit or scope of the present invention.

[0044] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to limit the invention. Unless the context clearly indicates otherwise, the singular forms used herein should also include the plural forms.

[0045] It is understood that the terms “comprising” and / or “including” as used herein indicate the presence of the stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, and / or combinations thereof. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items. In this specification, the term “connection” may indicate a physical relationship between two components, wherein the components are directly connected by welding, SPR (self-piercing rivets), FDS (flow drill screws), structural adhesive, etc., or indirectly connected by one or more intermediate components.

[0046] As used herein, “vehicle,” “of a vehicle,” “automobile,” or other similar terms generally refer to passenger cars, sports cars, sports utility vehicles (SUVs), buses, trucks, tractors, and various commercial vehicles, including passenger cars, hybrid vehicles, electric vehicles, hybrid electric vehicles, electric-based PBVs (private vehicles), hydrogen-powered vehicles, and other alternative fuel vehicles (e.g., those derived from resources other than petroleum fuels).

[0047] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0048] Figure 1 This is a top plan view showing a sill beam structure for an electric vehicle according to an embodiment of the present invention.

[0049] Reference Figure 1 The sill beam structure 100 for electric vehicles according to an embodiment of the present invention can be applied to the body of an electric vehicle.

[0050] In this specification, the reference directions used to describe the components may be set as follows: the front-rear direction of the vehicle 100 (e.g., the length direction or longitudinal direction of the vehicle), the width direction of the vehicle 100 (e.g., the lateral direction), and the vertical direction of the vehicle (e.g., the height direction or the up-down direction).

[0051] In this specification, the terms "upper end," "upper part," or "upper surface" of an assembly refer to the upper end, portion, or surface of the assembly as shown in the accompanying drawings, and the terms "lower end," "lower part," or "lower surface" of an assembly refer to the lower end, portion, or surface of the assembly as shown in the accompanying drawings.

[0052] Furthermore, in this specification, the end of a component (e.g., one end or another (other) end, etc.) refers to the end of the component in any direction, and the end portion of a component (e.g., one end portion or another (other) end portion, etc.) refers to the portion of the component that includes that end.

[0053] According to an embodiment of the present invention, the sill beam structure 100 for electric vehicles can be connected to both sides of the floor structure 1 in the electric vehicle body along the vehicle width direction, and can be arranged along the front-rear direction of the vehicle body.

[0054] The floor structure 1 may include a floor panel 3 (e.g., a central floor panel) and a plurality of crossbeams 5 joined to the upper surface of the floor panel 3 along the vehicle width direction.

[0055] The floor panel 3 on both sides along the vehicle width direction and the crossbeam 5 on both sides along the vehicle width direction can be connected to the sill beam structure 100 for electric vehicles according to an embodiment of the present invention.

[0056] Battery assembly 7 (see Figure 5The battery assembly 7 can be installed on the lower part of the floor structure 1. Both sides of the battery assembly 7 along the vehicle width direction can be connected to the sill beam structure 100 for electric vehicles according to an embodiment of the present invention.

[0057] The sill beam structure 100 for electric vehicles according to an embodiment of the present invention can minimize the rotation of the sill beam during a side collision of the electric vehicle and provide a structure that can reduce the collision energy transmitted to the battery assembly 7.

[0058] The sill beam structure 100 for electric vehicles according to an embodiment of the present invention provides a structure that can reduce the size of the body mounting components of the battery assembly 7 and reduce the number of parts of the battery mounting components of the battery assembly 7.

[0059] Figure 2 This is a partially exploded perspective view showing a sill beam structure for an electric vehicle according to an embodiment of the present invention. Figure 3 This is an exploded perspective view showing a sill beam structure for an electric vehicle according to an embodiment of the present invention. Figure 4 This is a perspective view showing a sill beam structure for an electric vehicle according to an embodiment of the present invention. Figure 5 It is along Figure 1 A cross-sectional view of the BB line in the diagram.

[0060] Reference Figures 1 to 5 According to an embodiment of the present invention, a sill beam structure 100 for electric vehicles may include an inner sill plate 10, an upper reinforcing member 30, a lower reinforcing member 50, and an outer sill plate 70.

[0061] In embodiments of the present invention, the inner sill plate 10 may include a panel made of steel formed in a set, selected or predetermined shape (e.g., stepped).

[0062] The sill inner panel 10 can be connected to both sides of the floor structure 1 along the vehicle width direction and can be arranged along the front-rear direction of the vehicle body. The sill inner panel 10 may include an inner side 11 and an outer side 12.

[0063] The inner side 11 of the sill inner panel 10 can be connected along the vehicle width direction to both sides of the floor panel 3 and the crossbeam 5 provided in the floor structure 1.

[0064] In an embodiment of the present invention, the upper reinforcing member 30 may be configured to enhance the side strength of the vehicle body.

[0065] The upper reinforcing member 30 can be connected to the outer side 12 of the upper part of the inner door sill plate 10 and can be arranged along the front and rear directions of the vehicle body.

[0066] In one example, the upper stiffener 30 may include an aluminum extrusion 31 with a generally rectangular cross-sectional shape. In another example, the aluminum extrusion 31 may include a plurality of closed sections 35 separated by at least one partition rib 33.

[0067] The upper reinforcement 30 can be mechanically connected to the inner sill plate 10 using SPR (self-piercing rivets) or FDS (flowing drill screws). The crossbeam 5 of the floor structure 1 and the upper reinforcement 30 can be located on a first imaginary line VL1 along the vehicle width direction.

[0068] As described above, the battery assembly 7 can be installed on the lower part of the floor structure 1. The battery assembly 7 may include side frames 9 connected to both sides of the battery pack 8. The side frames 9 can be connected to the lower part of the sill inner panel 10 via a bolt and nut coupling unit. In one example, the side frames 9 may include an aluminum extrusion.

[0069] The side 37 of the upper reinforcing member 30, which is connected to the outer side 12 of the inner sill plate 10, and the side 9a of the side frame 9 can be arranged on the second imaginary line VL2 along the vertical direction.

[0070] The end of the crossbeam 5 can be connected to the inner side 11 of the sill inner plate 10 at a position corresponding to the side 37 of the upper reinforcement 30, and the side 9a of the side frame 9 can be located on the second imaginary line VL2.

[0071] In an embodiment of the present invention, the lower reinforcing member 50 may be configured to enhance the side strength of the vehicle body and connect the crossbeam 5, the upper reinforcing member 30 and the side frame 9 of the battery assembly 7 in the vertical direction.

[0072] The lower reinforcement 50 can be arranged on the lower side of the upper reinforcement 30 along the front-rear direction of the vehicle body, and can be connected to the lower part of the upper reinforcement 30 and the outer side 12 (e.g., step surface) of the inner sill plate 10.

[0073] The lower reinforcing member 50 may include a plurality of unit assemblies 51 connected sequentially along the front-rear direction of the vehicle body. According to an embodiment of the present invention, the lower reinforcing member 50 may be honeycomb-shaped, wherein a plurality of units may be continuously formed along the front-rear direction of the vehicle body via the unit assemblies 51.

[0074] Figure 6 This is an assembly perspective view showing a lower reinforcement member applied to a sill beam structure for an electric vehicle according to an embodiment of the present invention. Figure 7 This is an exploded perspective view showing a unit assembly of a lower reinforcement member applied to a sill beam structure for an electric vehicle according to an embodiment of the present invention.

[0075] Reference Figures 2 to 7Each unit assembly 51 of the lower reinforcing member 50 according to an embodiment of the present invention may include an upper unit body 53 made of steel and a lower unit body 55 made of steel.

[0076] The upper unit 53 can be pressed into a set, selected, or predetermined shape and attached to the lower surface of the upper reinforcement 30. In one example, the cross-section of the upper unit 53 can be M-shaped.

[0077] The upper unit 53 may include an upper molding part 57, an upper connecting part 59, and an upper rib 61.

[0078] The upper molding portion 57 can be formed by recessing downward from the upper center of the upper unit body 53. The upper connecting portions 59 can extend forward and backward from the upper ends of both sides of the upper molding portion 57, respectively.

[0079] The upper connecting part 59 can be connected to the lower surface of the upper reinforcing member 30 by means of mechanical connection using SPR or FDS.

[0080] Each upper rib 61 may extend downward from the upper connecting portion 59. The upper connecting portion 59 may be connected to the lower unit body 55 in the front-rear direction of the vehicle body, which will be described later.

[0081] The lower unit 55 can be pressed into a set, selected or predetermined shape and disposed below the upper unit 53.

[0082] The lower unit 55 can be connected to the lower part of the upper unit 53 and the outer side 12 of the inner sill plate 10. In one example, the cross-section of the lower unit 55 can be U-shaped.

[0083] The lower unit 55 can be connected to the upper unit 53 and can form a honeycomb-shaped unit.

[0084] The lower unit 55 may include a lower connecting part 63 and a lower rib part 65.

[0085] The lower connecting part 63 can be formed along the front-rear direction of the lower unit 55 and can be connected to the outer side 12 of the inner door sill plate 10.

[0086] The lower connecting part 63 can be connected to the outer side 12 of the inner sill plate 10 by means of mechanical connection using SPR or FDS.

[0087] The lower connecting portion 63 may include at least one downwardly recessed lower molding portion 67. At least one lower molding portion 67 may be mechanically connected to the outer side surface 12 of the inner sill plate 10.

[0088] The lower rib 65 extends upward from both sides of the lower connecting part 63 and can be connected to the upper rib 61 of the upper unit 53 in the front-rear direction of the vehicle body.

[0089] Based on the unit unit of unit component 51, the upper rib 61 of the upper unit body 53 and the lower rib 65 of the lower unit body 55 can be connected by welding.

[0090] The upper rib 61 of the upper unit body 53 and the lower rib 65 of the lower unit body 55 of the unit assembly 51 can be adjacent to each other in the front-rear direction of the vehicle body and can be connected by welding.

[0091] Reference Figures 2 to 5 In embodiments of the invention, the sill outer panel 70 may include a panel assembly made of steel formed in a set, selected, or predetermined shape (e.g., stepped).

[0092] The upper reinforcing member 30 and the lower reinforcing member 50 may be arranged between the outer sill plate 70 and the inner sill plate 10 (e.g., sandwiched between and / or encapsulated within both). The outer sill plate 70 may be arranged in the vehicle's longitudinal direction and may be connected to the outer side 12 of the inner sill plate 10. The outer sill plate 70 may be welded to the inner sill plate 10.

[0093] The sill outer panel 70 can be connected to the upper reinforcement 30. The sill outer panel 70 can be connected to the upper reinforcement 30 by means of a mechanical connection using SPR or FDS.

[0094] The section from the side 37 of the upper reinforcing member 30 and the side 9a of the side frame 9 of the battery assembly 7 to the outer sill plate 70 can be defined as the Transformation Section TS.

[0095] Reference Figure 3 and Figure 4 The inner sill plate 10 can be connected to the welding nuts 81. The welding nuts 81 can be spaced apart at a set, selected or predetermined interval along the front-rear direction of the vehicle body.

[0096] Figure 8 This is a cross-sectional view showing a battery pack mounting structure for a sill beam structure for an electric vehicle according to an embodiment of the present invention.

[0097] like Figure 8 As shown, the welding nut 81 can penetrate the inner sill plate 10 and the lower unit 55 in the vertical direction, and can be connected to the inner sill plate 10 by welding.

[0098] The side frame 9 of the battery assembly 7 (which can be installed on the lower part of the floor structure 1) can be connected to the lower part of the sill inner panel 10 by means of engagement bolts 83 (which can be engaged with welding nuts 81).

[0099] Figure 9 This is a view used to explain the operation of a sill beam structure for an electric vehicle according to an embodiment of the present invention. Figure 10This is a view showing an example in comparison with a sill beam structure for an electric vehicle according to an embodiment of the present invention.

[0100] The following will refer to Figures 1 to 10 The operation of the sill beam structure 100 for electric vehicles according to an embodiment of the present invention is described in detail below.

[0101] In an embodiment of the present invention, the inner sill plate 10 and the outer sill plate 70 can be configured to be connected to each other.

[0102] The inner sill plate 10 and the outer sill plate 70, which can be connected to each other, can be arranged along the front-rear direction of the vehicle body. The inner sill plate 10 can be connected to the floor panel 3 and the crossbeam 5 provided in the floor structure 1 on both sides along the width direction of the vehicle.

[0103] An upper reinforcing member 30 can be installed on the inner side of the sill inner panel 10 and the outer sill outer panel 70 along the front-rear direction of the vehicle body. The upper reinforcing member 30 may include an aluminum extrusion 31.

[0104] The lower reinforcement 50 can be installed on the inner side of the sill inner panel 10 and the sill outer panel 70. The lower reinforcement 50 may include honeycomb unit assemblies 51 that can be welded sequentially along the front-rear direction of the vehicle body.

[0105] The aluminum extrusion 31 can be mechanically connected to the inner sill plate 10 and the outer sill plate 70 using SPR or FDS. The unit assembly 51 can be disposed on the underside of the aluminum extrusion 31 and connected to the aluminum extrusion 31 using SPR or FDS, and can be connected to the inner sill plate 10 by welding.

[0106] In this embodiment of the invention, the side frame 9 of the battery assembly 7 can be vertically connected to the lower part of the inner sill plate 10. The side frame 9 can be connected to the lower part of the inner sill plate 10 via a weld nut 81 connected to the inner sill plate 10 and a connecting bolt 83 engaging with the weld nut 81.

[0107] Unit component 51 can be vertically connected to the beam 5 of floor structure 1, aluminum extrusion 31, and side frame 9 of battery component 7.

[0108] In this embodiment of the invention, the crossbeam 5 and the aluminum extrusion 31 can be arranged along the vehicle width direction on the first imaginary line VL1.

[0109] In an embodiment of the invention, the side 37 of the aluminum extrusion 31 can be connected to the side 9a of the inner sill plate 10 and the side frame 9, and arranged vertically on the second imaginary line VL2.

[0110] The end of the crossbeam 5 can be connected to the side 9a of the inner sill plate 10 and the side frame 9, and is located on the second imaginary line VL2.

[0111] For the sill beam structure 100 for electric vehicles according to an embodiment of the present invention, in the event of a side collision, the collision energy can be absorbed by the aluminum extrusion 31 in the transition section TS. The aluminum extrusion 31, the crossbeam 5 located on the first imaginary line VL1, and the side frame 9 of the battery assembly 7 form a load path in the vertical direction.

[0112] According to an embodiment of the present invention, a sill beam structure 100 for an electric vehicle, such as... Figure 9 As shown, since the ends of the crossbeam 5, the side 37 of the aluminum extrusion 31, and the side 9a of the side frame 9 are all arranged on the second imaginary line VL2, the rotation of the sill beam caused by side collisions can be minimized.

[0113] For the sill beam structure 100 for electric vehicles according to an embodiment of the present invention, since the unit component 51 can connect the crossbeam 5, the aluminum extrusion 31 and the side frame 9 of the battery assembly 7 in the vertical direction, the deformation of the sill beam caused by side collision can be suppressed.

[0114] The overlap ratio between the aluminum extrusion 31 and the unit assembly 51 can be, for example, 30%. This prevents the unit assembly 51 from being lifted together with the aluminum extrusion 31 in the event of a side collision, thereby preventing the unit assembly 51 from rotating.

[0115] According to an embodiment of the present invention, a sill beam structure 100 for an electric vehicle can prevent damage to the battery assembly 7 by reducing the impact energy transmitted to the battery assembly 7 during a side collision. According to... Figure 10 The comparative example shown is a sill beam structure 200 for electric vehicles, which allows for the installation of an aluminum extrusion 107 between an inner sill plate 210 and an outer sill plate 270 that are connected to each other.

[0116] For according to Figure 10 In the comparative example shown, the end of the sill beam structure 200 for an electric vehicle and the end of the side frame 209 of the battery assembly 207 are not arranged on the same line in the vertical direction.

[0117] exist Figure 10 In the comparative example of the sill beam structure 200 for electric vehicles shown, with the end of the crossbeam 105 as a reference, the side frame 209 extends a relatively long length toward the outer sill plate 270 along the vehicle width direction.

[0118] Therefore, according to Figure 10 The comparative example shown is a sill beam structure 200 for electric vehicles, in which collision energy is concentrated and transferred to the side frame 209 of the battery assembly 207 from the beginning of the collision when a side collision occurs.

[0119] Since the side frame 209 of the battery assembly 207 can act as a hinge, the torque of the sill beam caused by the impact energy will increase.

[0120] Accordingly, according to Figure 10 The comparative example shown is a sill beam structure 200 for an electric vehicle. When a side collision occurs, the impact energy is concentrated on the upper part of the battery assembly 207, which can cause the battery assembly 207 to deform and be damaged.

[0121] However, unlike the comparative example, the sill beam structure 100 for electric vehicles according to an embodiment of the present invention can reduce the length of the side frame 9 of the battery assembly 7 in the vehicle width direction by applying the upper reinforcing member 30 and the lower reinforcing member 50.

[0122] According to an embodiment of the present invention, the sill beam structure 100 for electric vehicles can minimize the rotation of the sill beam caused by the impact energy when a side collision occurs, and safely protect the battery assembly 7.

[0123] The sill beam structure 100 for electric vehicles according to an embodiment of the present invention can ensure the side impact performance of electric vehicles, prevent the battery assembly 7 from being deformed and damaged by impact energy, and ensure the collision safety of occupants.

[0124] The sill beam structure 100 for electric vehicles according to an embodiment of the present invention can reduce the mechanical strength overlap between the vehicle body and the battery assembly 7 and the battery mounting components of the battery assembly 7, thereby improving the battery integration and volume ratio of the battery assembly 7.

[0125] While the invention has been described in conjunction with exemplary embodiments that are presently considered practical, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Rather, the invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A door sill beam structure for a vehicle, comprising: The sill inner panel is configured to be connected to the floor structure on both sides in the vehicle width direction and arranged in the front-rear direction of the vehicle body. The upper reinforcing member is connected to the outer side of the inner sill plate and is arranged along the front-rear direction of the vehicle body; The lower reinforcement is connected to the lower surface of the upper reinforcement and the outer side of the inner sill plate, and is arranged along the front-rear direction of the vehicle body; as well as The outer sill plate is connected to the outer side of the inner sill plate and the upper reinforcement, and is arranged along the front-rear direction of the vehicle body.

2. The sill beam structure according to claim 1, wherein, The floor panel and crossbeams in the floor structure are connected to the inner side of the sill inner panel on both sides in the vehicle width direction. and The crossbeam and the upper reinforcing member are arranged on a first imaginary line along the width direction of the vehicle.

3. The sill beam structure according to claim 2, wherein, The inner sill plate is connected to the side frame of the battery assembly mounted on the lower part of the floor structure; and The side of the upper reinforcing member connected to the outer side of the inner sill plate and the side of the side frame are arranged on a second imaginary line in the vertical direction.

4. The sill beam structure according to claim 3, wherein, The section from the side of the upper reinforcement and the side of the side frame to the outer sill plate is a transition section.

5. The sill beam structure according to claim 1, wherein, The upper reinforcing member includes an aluminum extrusion; and The aluminum extrusion includes multiple closed sections separated by at least one partition rib.

6. The sill beam structure according to claim 1, wherein, The lower reinforcement includes multiple unit components connected sequentially along the front-rear direction of the vehicle body.

7. The sill beam structure according to claim 6, wherein, The lower reinforcing member is formed in a honeycomb shape along the front-rear direction of the vehicle body through the multiple unit components.

8. The sill beam structure according to claim 6, wherein, Each unit component includes: An upper unit body made of steel is connected to the lower surface of the upper reinforcing member; and The lower unit, made of steel, is connected to the lower part of the upper unit and to the outer side of the inner sill plate.

9. The sill beam structure according to claim 8, wherein, The cross-section of the upper unit is M-shaped.

10. The sill beam structure according to claim 9, wherein, The lower unit has a U-shaped cross-section.

11. The sill beam structure according to claim 8, wherein, The upper unit body includes: The upper forming part is recessed from the top to the bottom; An upper connecting portion, which extends forward and backward from the upper molded portion and connects to the lower surface of the upper reinforcing member; and The upper ribs extend downward from the upper connecting portion.

12. The sill beam structure according to claim 11, wherein, The lower unit body includes: The lower connecting portion, which runs along the front-rear direction of the vehicle body and connects to the outer side of the inner sill plate; and The lower rib extends upward from both sides of the lower connecting portion.

13. The sill beam structure according to claim 12, wherein, The upper and lower ribs of each unit component are connected by welding.

14. The sill beam structure according to claim 13, wherein, The upper and lower ribs of adjacent unit components along the front-rear direction of the vehicle body are connected by welding.

15. The sill beam structure according to claim 8, wherein, A weld nut that passes vertically through the inner sill plate and the lower unit body is connected to the inner sill plate.

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