Car body for vehicle

Abstract

The present invention provides a car body for a vehicle, the car body including: a battery case disposed at a lower part of a vehicle; a first front side member which is disposed at a front part of the vehicle and extends in a longitudinal direction of the vehicle; a second front side member which is disposed to be spaced apart from the first front side member in a width direction of the vehicle and extends in the longitudinal direction of the vehicle; and a rear cross member which connects the first front side member and the second front side member and extends in the width direction of the vehicle, wherein the rear cross member is provided to overlap a front part of the battery case.

Description

Vehicle body

[0001] Embodiments of the present invention relate to a vehicle subframe and a vehicle body.

[0002] Due to the electrification of automobiles, the spread of electric vehicles that use motors as a driving source, replacing internal combustion engines, is increasing.

[0003] To increase their driving range (the distance they can travel on a full charge), these electric vehicles must be equipped with high-capacity batteries. Typically, electric vehicles utilize the underbody of the vehicle as a space for mounting the battery. By mounting the battery over a large area on the underbody, the battery capacity is increased, thereby extending the driving range.

[0004] Since the battery is mounted on the bottom of the vehicle, research is actively being conducted on the deformation of the front body and slant of the electric vehicle in a head-on collision, offset collision, or small overlap collision. In addition, safety against impact from protruding obstacles, such as when passing over speed bumps or uneven roads, must also be considered.

[0005] An embodiment of the present invention provides a body for a vehicle.

[0006] According to one aspect of the present invention, a vehicle body is provided, including: a battery case disposed at a lower portion of a vehicle; a first front side member disposed at a front portion of the vehicle and extending in a longitudinal direction of the vehicle; a second front side member disposed spaced apart from the first front side member in a width direction of the vehicle and extending in the longitudinal direction of the vehicle; and a rear cross member connecting the first front side member and the second front side member and extending in the width direction of the vehicle; wherein the rear cross member is provided to overlap a front portion of the battery case.

[0007] According to the present embodiment, when viewed from the front of the vehicle, the rear crossmember can cover the front portion of the battery case.

[0008] According to the present embodiment, the rear crossmember may be installed deeper downwards in the vehicle than the battery case.

[0009] According to the present embodiment, the rear crossmember may be provided in a straight shape.

[0010] According to the present embodiment, at least a portion of the rear crossmember may be provided in a convex curved shape toward the front of the vehicle.

[0011] According to one embodiment of the present invention, as described above, a vehicle body for protecting an electric vehicle battery can be implemented. Of course, the scope of the present invention is not limited by these effects.

[0012] Figure 1 schematically illustrates a side view and a plan view of the vehicle.

[0013] Figure 2a schematically illustrates a perspective view of the front body structure of the vehicle and the vehicle subframe.

[0014] Figure 2b is a schematic side view of the front body structure and vehicle subframe of the vehicle.

[0015] Figure 2c is a schematic plan view of the front body structure and vehicle subframe of the vehicle as viewed from the front.

[0016] FIGS. 3 and 4 schematically illustrate perspective views of a rear crossmember and a battery case according to one embodiment.

[0017] The present invention is capable of various modifications and embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention, as well as the methods for achieving them, will become clearer with reference to the embodiments described in detail below, along with the drawings. However, the present invention is not limited to the embodiments disclosed below and can be implemented in various forms.

[0018] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same reference numerals and redundant descriptions thereof will be omitted.

[0019] In the examples below, the terms first, second, etc. are not used in a limiting sense, but are used for the purpose of distinguishing one component from another.

[0020] In the examples below, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0021] In the examples below, terms such as “include” or “have” mean that a feature or component described in the specification is present, and do not preclude the possibility that one or more other features or components may be added.

[0022] In the following examples, when a part such as a film, region, component, etc. is said to be on or above another part, it includes not only a case where it is directly on top of the other part, but also a case where another film, region, component, etc. is interposed in between.

[0023] For convenience of explanation, the sizes of components in the drawings may be exaggerated or reduced. For example, the sizes and thicknesses of each component shown in the drawings are arbitrarily indicated for convenience of explanation, and thus the present invention is not necessarily limited to what is shown.

[0024] In some embodiments, where implementations are otherwise feasible, specific process sequences may be performed in a different order than described. For example, two processes described in succession may be performed substantially simultaneously, or in a reverse order from the described order.

[0025] In this specification, “A and / or B” refers to the case where it is A, or B, or both A and B. And, “at least one of A and B” refers to the case where it is A, or B, or both A and B.

[0026] In the following examples, when it is said that a film, region, component, etc. are connected, it includes cases where the films, regions, components, etc. are directly connected, and / or cases where other films, regions, components, etc. are interposed between the films, regions, components, etc. and are indirectly connected. For example, when it is said in this specification that a film, region, component, etc. are electrically connected, it refers to cases where the films, regions, components, etc. are directly electrically connected, and / or cases where other films, regions, components, etc. are interposed between them and are indirectly electrically connected.

[0027] The x-axis, y-axis, and z-axis are not limited to the three axes in the Cartesian coordinate system, but can be interpreted in a broader sense that includes them. For example, the x-axis, y-axis, and z-axis may be orthogonal to each other, but they can also refer to different directions that are not orthogonal to each other.

[0028]

[0029] Figure 1 schematically illustrates a side view and a plan view of a vehicle. Specifically, Figure 1 (a) schematically illustrates a side view of the vehicle as viewed from the side, and Figure 1 (b) schematically illustrates a plan view of the vehicle as viewed from above. Figure 1 schematically illustrates a side view and a plan view of the vehicle to specifically express the longitudinal direction of the vehicle, the width direction of the vehicle, and the height direction of the vehicle.

[0030] Referring to (a) of Fig. 1, the longitudinal direction of the vehicle may be the x direction. The height direction of the vehicle may be the z direction. The height direction of the vehicle (e.g., the z direction) may be a direction that intersects the longitudinal direction of the vehicle (e.g., the x direction) in a side view.

[0031] Referring to (b) of FIG. 1, the longitudinal direction of the vehicle may be the x direction. The width direction of the vehicle may be the y direction. The width direction of the vehicle (e.g., the y direction) may be a direction intersecting the longitudinal direction of the vehicle (e.g., the x direction). Although not shown, the height direction of the vehicle (e.g., the z direction) may be a direction intersecting the width direction of the vehicle (e.g., the y direction).

[0032]

[0033] Figure 2a is a schematic perspective view of the front body structure and vehicle subframe of a vehicle. Figure 2b is a schematic side view of the front body structure and vehicle subframe of a vehicle. Figure 2c is a schematic plan view of the front body structure and vehicle subframe of a vehicle.

[0034] Referring to FIGS. 2A, 2B, and 2C, the front body structure of the vehicle may include a first front side member (11), a second front side member (12), a rear crossmember (30), a rear crossmember side (31), a dash crossmember (40), a dash crossmember side (41), a dash panel (20), and a side sill inner front extension (60). The first front side member (11) and the second front side member (12) may be arranged to extend in the longitudinal direction of the vehicle (e.g., the x direction). The first front side member (11) and the second front side member (12) may be arranged to be spaced apart in the width direction of the vehicle (e.g., the y direction).

[0035] The rear cross member (30) is connected to the first front side member (11) and the second front side member (12) and can extend in the width direction of the vehicle (e.g., y direction).

[0036] The rear crossmember (30) may include rear crossmember sides (31) arranged on both sides. In other words, the rear crossmember (30) may include rear crossmember sides (31) arranged on the left and right sides of the vehicle. The first front side member (11) and the second front side member (12) may be connected to the rear crossmember (30) and the rear crossmember side (31), and the first front side member (11) and the second front side member (12) may be connected to the side sill inner front extension (60) through the rear crossmember side (31).

[0037] The side sill inner front extension (60) may extend along the left and right sides of the vehicle in the longitudinal direction of the vehicle (e.g., x direction). The side sill inner front extension (60) may be connected to the first front side member (11) and the second front side member (12) via the rear crossmember side (31). Although not shown, a side sill may be arranged on the outside of the side sill inner front extension (60). A battery case (70) may be arranged at the bottom of the side sill inner front extension (60).

[0038] A dash panel (20) may be arranged behind the first front side member (11) and the second front side member (12). In other words, the dash panel (20) may be arranged above the rear cross member (30) and the dash cross member (40). The length of the dash panel (20) may extend along the width direction of the vehicle (e.g., y direction), and the height of the dash panel (20) may extend along the height direction of the vehicle (e.g., z direction). The dash panel (20) may partition the front body structure and the passenger compartment of the vehicle. The front body structure of the vehicle may accommodate a powertrain including an electric motor or an internal combustion engine. The dash cross member (40) may be attached to the front of the dash panel (20).

[0039] A dash cross member (40) may be placed at the bottom of the dash panel (20). The dash cross member (40) may extend in the width direction of the vehicle (e.g., y direction). The dash cross member (40) may be connected to the dash panel (20).

[0040] Dash crossmember sides (41) may be arranged on both sides of the dash crossmember (40). In other words, the dash crossmember sides (41) may be arranged on the left and right sides of the vehicle. The dash crossmember sides (41) may be connected to the dash panel (20) and the dash crossmember (40). In addition, the dash crossmember sides (41) may be connected to the first front side member (11) and the second front side member (12).

[0041] In one embodiment, a vehicle subframe (50) may be disposed below a first front side member (11) and a second front side member (12). The vehicle subframe (50) may include a first side member (53) and a second side member (54) extending in a longitudinal direction of the vehicle (e.g., x direction). The first side member (53) and the second side member (54) may be disposed to be spaced apart in a width direction of the vehicle (e.g., y direction).

[0042] Additionally, the vehicle subframe (50) may include a first cross member (51) and a second cross member (52) extending in the width direction of the vehicle (e.g., y direction). The first cross member (51) and the second cross member (52) may be spaced apart from each other in the length direction of the vehicle (e.g., x direction).

[0043] The first cross member (51) may be connected to the first side member (53) and the second side member (54). Similarly, the second cross member (52) may also be connected to the first side member (53) and the second side member (54). The second cross member (52) may be arranged closer to the front of the vehicle than the first cross member (51).

[0044]

[0045] FIGS. 3 and 4 schematically illustrate perspective views of a rear crossmember and a battery case according to one embodiment.

[0046] A battery case (70) and a battery may be placed on the lower part of the vehicle. Specifically, the battery case (70) and the battery may be placed on the rear side of the rear cross member (30) and the lower side of the side sill inner front extension (60).

[0047] As described above, the rear crossmember (30) can be connected to the first front side member (11) and the second front side member (12). The rear crossmember (30) can extend in the width direction of the vehicle (e.g., the y direction).

[0048] The rear crossmember (30) may be provided to overlap with the front portion of the battery case (70) arranged at the rear thereof. When viewed from the front of the vehicle, the rear crossmember (30) may be provided to cover the front portion of the battery case (70). The front portion of the rear crossmember (30) may be provided in a rectangular shape so as to overlap with the front portion of the battery case (70) when viewed from the front of the vehicle. However, the present invention is not limited thereto.

[0049] When viewed from the side of the vehicle, the side of the rear crossmember (30) may be provided in a rectangular shape. However, the present invention is not limited thereto. When viewed from the side of the vehicle, the side of the rear crossmember (30) may be provided in a parallelogram or trapezoidal shape.

[0050] The rear crossmember (30) may be positioned deeper in the lower portion of the vehicle than the battery case (70). Specifically, the rear crossmember (30) may be positioned deeper in the lower portion of the vehicle than the battery case (70) by at least about 5% of the length of the battery case (70) in the height direction of the vehicle (e.g., in the z direction).

[0051] The rear cross member (30) overlaps the front part of the battery case (70) and is installed deeper toward the bottom of the vehicle than the battery case (70), so that when an object or curb passes under the vehicle, the rear cross member (30) can come into contact with the object before the battery case (70), thereby allowing the vehicle to stop and preventing damage to the battery case (70) and the battery positioned at the rear part of the rear cross member (30).

[0052] In one embodiment, the rear crossmember (30) may be provided in a straight shape. However, the present invention is not limited thereto.

[0053] In another embodiment, at least a portion of the rear crossmember (30) may be provided in a curved shape. Specifically, at least a portion of the rear crossmember (30) may be provided in a curved shape that is convex toward the front of the vehicle. Specifically, the radius of curvature of the rear crossmember (30) provided in a curved shape may be 1500 mm or more.

[0054] When at least a portion of the rear cross member (30) is provided in a convex curved shape toward the front of the vehicle, when an object passes under the vehicle, the object collides with the convex portion of the rear cross member (30), causing the body of the vehicle to deviate left and right, and stopping the vehicle or absorbing energy at the time of collision at the convex portion, thereby preventing damage to the battery case (70) and the battery at the rear portion of the rear cross member (30).

[0055] The rear cross member (30) may be made of a cold-rolled material and may include a plated or non-plated material, and its tensile strength may be at least 780 MPa or more. In addition, the rear cross member (30) may include heat-treated steel, and its tensile strength may be at least 1470 MPa or more. When the rear cross member (30) is made of high-strength steel, the thickness of the rear cross member (30) in the longitudinal direction of the vehicle (e.g., x direction) may be reduced, thereby realizing weight reduction of the rear cross member (30).

[0056] According to embodiments of the present invention, furthermore, the rear cross member (30) connecting the first front side member (11) and the second front side member (12) may be provided to overlap the front portion of the battery case (70). The rear cross member (30) may be provided to cover the battery case (70), so that when an object passes under the vehicle, the rear cross member (30) collides with the object before the battery case (70), allowing the vehicle to stop, and absorbing energy upon collision first, preventing damage to the battery case (70) and the battery.

[0057]

[0058] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

Claims

1. Battery case placed on the bottom of the vehicle; A first front side member disposed at the front portion of the vehicle and extending in the longitudinal direction of the vehicle; A second front side member spaced apart from the first front side member in the width direction of the vehicle and extending in the length direction of the vehicle; and A rear cross member connecting the first front side member and the second front side member and extending in the width direction of the vehicle; A vehicle body, wherein the rear crossmember is provided to overlap the front portion of the battery case.

2. In paragraph 1, A vehicle body, wherein when viewed from the front of the vehicle, the rear crossmember covers the front portion of the battery case.

3. In paragraph 1, A vehicle body, wherein the rear crossmember is installed deeper downward in the vehicle than the battery case.

4. In paragraph 1, A vehicle body having the above rear crossmember in a straight shape.

5. In paragraph 1, A vehicle body, wherein at least a portion of the rear crossmember is provided in a convex curved shape toward the front of the vehicle.

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