Connection structure of electric vehicle

Abstract

The present invention relates to a connection structure of an electric vehicle, comprising: a transverse member, a side member, and a joint member, wherein the transverse member is arranged in the width direction of a vehicle body, the side member is arranged in the length direction of the vehicle body, the joint member is inserted into the transverse member and connected to the side member, and the joint member comprises an insertion portion inserted into the transverse member and a clamping portion connected to the side member.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority of Korean Patent Application No. 10-2020-0176167 filed in the Korean Intellectual Property Office on December 16, 2020, and incorporates the entire contents of the application into this document by reference. Technical Field

[0003] The invention relates to a connection structure of an electric vehicle. Background Art

[0004] Recently, the electric vehicle (EV) market has grown rapidly, and the demand for extended driving range is increasing. In the early stages of electric vehicle development, the high-voltage battery was located on the rear floor common to existing internal combustion engine vehicles. However, recently developed electric vehicles place a high-voltage battery of increased size at the bottom of the center floor to extend the driving range.

[0005] However, the high-voltage battery has the risk of catching fire when damaged and is particularly susceptible to side and pole collisions when placed under the center floor. Therefore, in order to protect the high-voltage battery, it is necessary to minimize the deformation caused by collision in the body side sealing structure.

[0006] In general electric vehicles, aluminum reinforcements are applied inside the side sills to strengthen the side sills. Aluminum reinforcements are lightweight, low in specific gravity, and have excellent impact absorption performance, but the side seals may bend due to excessive deformation during side impacts. However, if reinforcements are excessively applied to prevent this, costs and weight may increase.

[0007] In addition, due to insufficient connectivity between the aluminum reinforcement and the plate-shaped cross member arranged in the vehicle width direction, the torsional strength of the vehicle body may be deteriorated. Lack of torsional strength may deteriorate the vehicle's ride and handling (R&H) performance and further affect the durability performance of the battery installation area.

[0008] The above information disclosed in the background technology section is only intended to deepen the understanding of the background technology of the present invention, and therefore it may contain information that does not constitute the prior art known to those skilled in the art. Summary of the invention

[0009] The present invention relates to a connection structure for an electric vehicle and a specific embodiment relates to such a connection structure for an electric vehicle having improved energy absorption performance in the event of a side impact.

[0010] Embodiments of the present invention provide a connection structure of an electric vehicle that can more effectively protect a battery by improving energy absorption performance in the event of a side collision.

[0011] An exemplary embodiment of the present invention provides a connection structure of an electric vehicle, which can increase the lateral strength of a vehicle body by improving connectivity between members in the length direction and the width direction of the vehicle body.

[0012] A connection structure of an electric vehicle according to an exemplary embodiment of the present invention may include a cross member provided in a width direction of a vehicle body, a side member provided in a length direction of the vehicle body, and a joining member inserted into the cross member and connected to the side member.

[0013] The engaging member may include an insert portion inserted into the cross member and a clamp portion connected to the side member.

[0014] The joining member may have a rib formed in a width direction of the vehicle body.

[0015] A reinforcement rib may be formed in the insertion portion in the width direction of the vehicle body.

[0016] A connection hole for connection with the cross member may be formed in the up-down direction in the insertion portion.

[0017] The seat rails can be connected via the connection holes.

[0018] The side member may include an inner beam plate connected to the vehicle body, a plate hole may be formed in the inner beam plate, and the insert portion may be connected to the cross member through the plate hole.

[0019] The connection structure may further include a sealing member for sealing the plate hole.

[0020] The side member may include an inner beam panel connected to the vehicle body, an outer beam panel connected to the inner beam panel, and a side beam reinforcement inserted inside the inner beam panel and the outer beam panel, and the clamp portion may be connected to the side beam reinforcement.

[0021] The joining member and the side sill reinforcement may be made of an aluminum material.

[0022] The joining member and the side sill reinforcement may be welded together.

[0023] The cross member may include a connecting flange connected to the side members.

[0024] According to the connection structure of the electric vehicle of the exemplary embodiment of the present invention, the energy absorption performance is improved in the event of a side collision, so that the battery can be protected more effectively.

[0025] According to the connection structure of the electric vehicle according to the exemplary embodiment of the present invention, the lateral strength of the vehicle body can be increased by improving the connectivity between the members in the length direction and the width direction of the vehicle body.

[0026] In addition, the transmission of vibration noise on the road surface can be suppressed by improving the lateral strength of the vehicle body.

[0027] According to the connection structure of the electric vehicle of the exemplary embodiment of the present invention, the engaging member is used as the seat mounting bracket, thereby making it possible to save a plurality of parts and increase the connection strength with the seat.

[0028] In addition, in the detailed description of the embodiments of the present invention, the effects that can be obtained or predicted by the embodiments of the present invention will be disclosed directly or implicitly. That is, various effects predicted according to the embodiments of the present invention will be described in the detailed description described later. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] These drawings are only for reference in describing exemplary embodiments of the present invention, and thus the technical idea of ​​the present invention should not be limited to the drawings.

[0030] Figure 1 is a perspective view showing a vehicle body to which a connection structure of an electric vehicle according to an exemplary embodiment of the present invention is applied.

[0031] Figure 2 is a partially exploded perspective view showing a connection structure of an electric vehicle according to an exemplary embodiment of the present invention.

[0032] Figure 3 It is along Figure 1 A cross-sectional view taken along line III-III.

[0033] Figure 4 is a perspective view of a joining member of a connection structure applicable to an electric vehicle according to an exemplary embodiment of the present invention.

[0034] Figure 5 is an assembly view illustrating a connection structure of an electric vehicle according to an exemplary embodiment of the present invention.

[0035] Figure 6 It is along Figure 3 Partial cross-sectional view taken along line VI-VI.

[0036] The following elements are used to describe embodiments of the present invention.

[0037] 10: Body 20: Floor

[0038] 30: Transverse member 32: Connecting part

[0039] 34: Connecting flange 40: Side member

[0040] 42: Inner beam plate 44: Plate hole

[0041] 46, 48: Sealing member 50: External beam plate

[0042] 60: Joint member 62: Insertion portion

[0043] 64: Reinforcement rib 66: Connection hole

[0044] 68: Clamping part 70, 71: Reinforcement rib

[0045] 80: Side beam reinforcement 90: Battery box

[0046] 100: Seat rail 102: Connecting bolt. DETAILED DESCRIPTION

[0047] In the following detailed description, only certain exemplary embodiments of the present invention have been shown and described, simply by way of illustration.

[0048] As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

[0049] Throughout the specification, components denoted by the same reference numerals denote the same components.

[0050] In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity.

[0051] When a component such as a layer, a film, a region, or a plate is said to be “on” another component, this includes not only a case of being directly above the other component but also a case of having another component therebetween.

[0052] In contrast, when an element is referred to as being “directly on” another element, there are no intervening elements present.

[0053] Throughout the specification, when a component “comprises” a certain component, it means that other components may be included rather than excluding other components, unless there is a clear description to the contrary.

[0054] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0055] Figure 1 is a perspective view showing a vehicle body to which a connection structure of an electric vehicle according to an exemplary embodiment of the present invention is applied, and Figure 2 is a partially exploded perspective view showing a connection structure of an electric vehicle according to an exemplary embodiment of the present invention.

[0056] refer to Figure 1 and Figure 2, the connection structure of the electric vehicle according to the exemplary embodiment of the present invention may be applied to a vehicle in which the battery box 90 is installed under the vehicle body 10 (ie, under the floor 20 ).

[0057] Figure 3 It is along Figure 1 A cross-sectional view taken along line III-III.

[0058] refer to Figures 1 to 3 According to an exemplary embodiment of the present invention, a connection structure of an electric vehicle may include a cross member 30 disposed in a width direction of a vehicle body 10 , a side member 40 disposed in a length direction of the vehicle body, and a joining member 60 inserted into the cross member 30 and connected to the side member 40 .

[0059] The cross member 30 has a substantially “U” shape in its cross section, and the floor panel 20 and the cross member 30 are connected to form a connection portion 32 .

[0060] The engaging member 60 can be inserted into the connecting portion 32 to be connected to the cross member 30. Therefore, the cross member 30 and the side member 40 are connected by the connecting portion 32 to maintain connectivity, and bending of the side member 40 can be suppressed in the event of a side collision of the vehicle.

[0061] Figure 4 is a perspective view of a joining member of a connection structure applicable to an electric vehicle according to an exemplary embodiment of the present invention.

[0062] refer to Figure 3 and Figure 4 , the engaging member 60 may include an insert portion 62 inserted into the cross member 30 and a clamp portion 68 connected to the side member 40 .

[0063] The joining member 60 may have reinforcing ribs 70 and 71 formed in the width direction of the vehicle body 10. Therefore, even if an impact load is transmitted to the lateral direction of the vehicle body 10, bending of the side member 40 can be suppressed by the reinforcing ribs 70 and 71 of the joining member 60. As shown in the figure, the reinforcing ribs 70 and 71 may be formed in the width direction of the vehicle body 10.

[0064] A reinforcing rib 64 may be formed in the insertion portion 62, the reinforcing rib 64 being formed in the width direction of the vehicle body 10. Therefore, even if an impact load is transmitted to the lateral direction of the vehicle body 10, bending of the insertion portion 62 can be suppressed by the reinforcing rib 64 of the joint member 60. As shown in the figure, the reinforcing rib 64 may be formed in the width direction of the vehicle body 10.

[0065] In the insertion portion 62, a connection hole 66 for connection with the cross member 30 may be formed in the up-down direction. For example, a connection bolt 102 is engaged in the connection hole 66, so that the joint member 60 and the cross member 30 can be connected.

[0066] The seat rail 100 can also be connected through the connection hole 66. In other words, the seat rail 100 is provided on the cross member 30, and the connection bolt 102 is engaged to connect the engagement member 60, the cross member 30, and the seat rail 100, and therefore, the assembly process can be simplified and the number of parts to be engaged can be reduced. In other words, the engagement member 60 can be used as a mounting bracket to mount the seat rail 100, thereby increasing the connection strength with the seat.

[0067] refer to Figure 3 The side member 40 may include an inner beam panel 42 connected to the vehicle body 10 and an outer beam panel 50 connected to the inner beam panel 42 .

[0068] The plate hole 44 is formed in the inner beam plate 42 so that the insertion portion 62 can be connected to the cross member 30 through the plate hole 44. Therefore, the number of components for connection between the side member 40 and the vehicle body 10 can be reduced, and the connection strength can be increased.

[0069] The connection structure of the electric vehicle according to the exemplary embodiment of the present invention may further include sealing members 46 and 48 for sealing the plate hole 44. The sealing members 46 and 48 may prevent foreign matter from penetrating into the side member 40.

[0070] The connection structure of the electric vehicle according to the exemplary embodiment of the present invention may further include a side sill reinforcement 80 inserted inside the inner beam plate 42 and the outer beam plate 50 .

[0071] The clip portion 68 can be connected to the side sill reinforcement 80. The side sill reinforcement 80 is inserted into the "U"-shaped section of the clip portion 68, so that the clip portion 68 and the side sill reinforcement 80 can be firmly connected.

[0072] The joining member 60 and the side beam reinforcement 80 can be formed of an aluminum material. Therefore, the overall weight of the connection structure of the electric vehicle according to the exemplary embodiment of the present invention can be reduced.

[0073] The joining member 60 and the side sill reinforcement 80 may be welded together. The joining member 60 and the side sill reinforcement 80 may be formed by aluminum extrusion and may be welded by welding such as CO 2 Solder to connect.

[0074] Figure 5 is an assembly view illustrating a connection structure of an electric vehicle according to an exemplary embodiment of the present invention.

[0075] refer to Figure 5 , the cross member 30 may include a connection flange 34 connected to the side member 40, and the connection flange 34 may be connected to the inner beam plate 42. For example, the cross member 30 and the inner beam plate 42 may be formed of a steel material, and when a side load of the vehicle occurs, for example, under a pole impact, the cross member 30 and the inner beam plate 42 can appropriately disperse the side load.

[0076] Figure 6 It is along Figure 3 Partial cross-sectional view taken along line VI-VI.

[0077] like Figure 6 As shown, as a space formed by the floor panel 20 and the cross member 30, the insertion portion 62 is inserted and connected, so that the joint member 60 and the vehicle body 10 can be connected without a separate bracket.

[0078] The bending of the insertion portion 62 can be suppressed by the lattice-pattern reinforcement ribs 64 , thereby preventing the battery case 90 from being damaged.

[0079] Furthermore, the cross member 30 can be connected through the connecting hole 66 , and in addition, the seat rail 100 can be engaged, thereby reducing the number of components.

[0080] The joining member 60 connects the side sill reinforcement 80 in the length direction of the vehicle body 10 and the cross member 30 in the width direction of the vehicle body 10 without disconnection, which is advantageous in terms of dispersing the collision load.

[0081] The side sill reinforcement 80 and the joint member 60 can be securely connected to ensure joint integrity, and the transmission of road noise can be reduced.

[0082] While the invention has been described in conjunction with what are presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but rather is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A connection structure for an electric vehicle, the connection structure comprising: a cross member disposed in a width direction of the vehicle body; A side member is arranged in the length direction of the vehicle body, and the side member includes: an inner beam plate configured to be connected to the vehicle body; an outer beam plate connected to the inner beam plate; and a side sill reinforcement inserted inside the inner sill plate and the outer sill plate; and A joining member is inserted into the cross member and connected to the side sill reinforcement inside the inner sill plate and the outer sill plate.

2. The connection structure of the electric vehicle according to claim 1, wherein: The engagement member comprises: an insertion portion, which is inserted into the cross member, and A clamping portion is connected to the side member.

3. The connection structure of the electric vehicle according to claim 2, wherein: The joining member includes a rib formed in a width direction of the vehicle body. 4 . The connection structure of the electric vehicle according to claim 2 , further comprising a reinforcing rib formed in the insertion portion in a width direction of the vehicle body. 5 . The connection structure of the electric vehicle according to claim 2 , further comprising a connection hole formed in an up-down direction in the insertion portion for connection with the cross member. 6 . The connection structure of the electric vehicle according to claim 5 , further comprising a seat rail connected through the connection hole.

7. The connection structure of an electric vehicle according to claim 2, wherein: A plate hole is formed in the inner beam plate, and the insert portion is connected to the cross member through the plate hole. 8 . The connection structure of the electric vehicle according to claim 7 , further comprising a sealing member configured to seal the plate hole.

9. The connection structure of an electric vehicle according to claim 1, wherein: The cross member includes a connecting flange connected to the side members.

10. A connection structure for an electric vehicle, the connection structure comprising: a cross member disposed in a width direction of the vehicle body; A side member is arranged in the length direction of the vehicle body, wherein the side member comprises: an inner beam plate configured to be connected to the vehicle body; an outer beam plate connected to the inner beam plate; and a side sill reinforcement inserted inside the inner sill plate and the outer sill plate; and a joining member inserted into the cross member and connected to the side member reinforcement inside the inner beam plate and the outer beam plate, wherein the joining member comprises: an insertion portion, which is inserted into the cross member, and A clip portion is connected to the side member, wherein the clip portion is connected to the side sill reinforcement.

11. The connection structure of the electric vehicle according to claim 10, wherein: The joining member and the side sill reinforcement include an aluminum material.

12. The connection structure of the electric vehicle according to claim 11, wherein: The joining member and the side sill reinforcement are welded together.

13. A vehicle comprising: a vehicle body, which includes a floor; a battery box mounted under the floor of the vehicle body; a transverse member disposed in a width direction of the vehicle body; A side member is arranged in the length direction of the vehicle body, and the side member includes: an inner beam plate configured to be connected to the vehicle body; an outer beam plate connected to the inner beam plate; and a side sill reinforcement inserted inside the inner sill plate and the outer sill plate; and A joining member includes an inserting portion inserted into the cross member and a clamping portion connected to the side sill reinforcement inside the inner beam plate and the outer beam plate.

14. The vehicle according to claim 13, wherein: The joining member includes a rib formed in a width direction of the vehicle body.

15. The vehicle according to claim 13, further comprising a reinforcement rib formed in the insertion portion in a width direction of the vehicle body.

16. The vehicle according to claim 13, further comprising a connection hole formed in an up-down direction in the insertion portion for connection with the cross member.

17. The vehicle of claim 16, further comprising a seat rail connected through the connecting hole.

18. The vehicle of claim 13, wherein: A plate hole is formed in the inner beam plate, through which the insert portion is connected to the cross member.

19. The vehicle of claim 18, further comprising a sealing member configured to seal the plate hole.

20. The vehicle of claim 13, wherein: The cross member includes a connecting flange connected to the side members.

Images