Electric vehicle structure

Abstract

An electric vehicle structure includes: side members disposed on both sides of a vehicle body; a floor panel fixed to the side beams at both side ends thereof; a battery bracket coupled to a lower side of the side member to define a battery accommodating space together with the floor panel; an integrated battery front cross member extending in a lateral direction of the vehicle body to be coupled to the side members at both ends thereof and to interconnect a front side of the battery bracket and the floor panel; and an instrument panel cross member connected to the floor panel and to a front upper side of the integrated battery front cross member, and extending in a lateral direction of the vehicle body.

Description

Technical Field

[0001] The present disclosure relates to a structure of an electric vehicle. Background Art

[0002] The electric vehicle is configured to be driven by driving a motor using electric power supplied from a battery installed in the electric vehicle.

[0003] Therefore, the driving range of an electric vehicle depends largely on the energy storage capacity of the batteries installed in it.

[0004] A major trend in the development of electric vehicles is to install batteries in the electric vehicles to provide as much electric energy as possible and to ensure performance against various types of collisions.

[0005] The information disclosed in this Background section of the present disclosure is only for enhancement of understanding of the general background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the relevant technology already known to a person skilled in the art. Summary of the invention

[0006] Therefore, the present disclosure is made in view of the above problems, and an object of the present disclosure is to provide an electric vehicle structure that can increase the vehicle's cruising range by increasing the number of batteries installed therein, while minimizing the increase in vehicle body weight and ensuring the vehicle's performance in resisting various types of collisions.

[0007] According to the present disclosure, the above and other purposes can be achieved by an electric vehicle structure, which includes: side sills (side panels) arranged on both sides of the vehicle body; a floor panel, the two side ends of which are fixed to the side sills; a battery bracket, which is connected to the lower side of the side sills to define a battery accommodating space together with the floor panel; an integrated battery front cross member, which extends in the lateral direction of the vehicle body to be connected to the side sills at both ends of the integrated battery front cross member and connects the front side of the battery bracket to the floor panel; and an instrument panel cross member, which is connected to the floor panel and to the front upper side of the integrated battery front cross member, and the instrument panel cross member extends in the lateral direction of the vehicle body.

[0008] The instrument panel cross member may have a cross-sectional shape in which a plurality of closed cross sections are connected to each other, and may be provided to protrude in front of the instrument panel.

[0009] The instrument panel cross member may have a shape covering both an upper surface of the floor panel and a front surface of the integrated-battery front cross member, and the instrument panel cross member may be coupled to the floor panel and the integrated-battery front cross member.

[0010] The electric vehicle structure may further include a plurality of front side members connected to the front side of the instrument panel cross member, and the instrument panel cross member may be connected at both ends of the instrument panel cross member to the A-pillars, which are coupled to the side beams at their lower ends.

[0011] The electric vehicle structure may further include a front subframe disposed below the front side member, and the front subframe may be installed such that a rear end portion of the front subframe is supported on a lower side of the instrument panel cross member.

[0012] The instrument panel cross member may be connected to the A-pillars via instrument panel cross extensions.

[0013] The front side member may be coupled to the instrument panel cross member through a front rear lower member coupled to a rear side of the front side member, and the front rear lower member may be coupled to the instrument panel cross member and the integrated-battery front cross member at the rear side of the front rear lower member.

[0014] The instrument panel cross member may be configured to have a cross-sectional shape extending from the front upper side of the integrated battery front cross member and the floor panel toward the rear side of the front side member, and the front side rear lower member may be formed to extend from the rear side of the front side member and expand in the up-down direction to cover the front side, upper side, and lower side of the instrument panel cross member.

[0015] The electric vehicle structure may further include a side extension member coupled to the front side rear lower member and the instrument panel cross extension to connect the front side member to the A-pillar and define a closed space around an end portion of the instrument panel cross member.

[0016] The lateral extension portion of the instrument panel can be integrally formed with an upper extension member portion and a lower extension member portion, the upper extension member portion is in a curved shape extending from the front side of the vehicle body toward the rear upper side of the vehicle body and together with the side extension member defines a closed space, and the lower extension member portion is in a curved shape extending from the front side of the vehicle body toward the rear lower side of the vehicle body.

[0017] The side extension member may be integrally formed with a side front upper extension member portion having a curved shape extending from the front side of the vehicle body toward the rear upper side of the vehicle body and corresponding to the upper extension member portion of the instrument panel transverse extension portion.

[0018] The battery bracket can be provided with a battery lower module inner cross member, which is spaced rearward from the integrated battery front cross member and extends in the lateral direction of the vehicle body. The floor panel can be provided with a floor cross member, which is arranged on the battery lower module inner cross member and extends in the lateral direction of the vehicle body, and the floor cross member can be connected to the battery lower module inner cross member.

[0019] The electric vehicle structure may further include an instrument panel upper member extending in a front-rear direction of the vehicle body and coupled between the instrument panel cross member and the floor cross member.

[0020] The floor panel may be formed of an extruded material in a shape in which a plurality of closed sections are connected to each other, and the floor cross member may be integrally formed of the floor panel using a highest protruding closed section among the plurality of closed sections of the floor panel.

[0021] The battery receiving space may be disposed behind the cross member in the battery lower module.

[0022] The battery bracket can be provided with a lower module outer front cross member, a lower module outer rear cross member and a plurality of lower module outer side members to surround the outer periphery of the battery accommodating space, and the electric vehicle structure can also include a pad arranged on the upper surface of the lower module outer front cross member, the upper surface of the lower module outer rear cross member and the upper surface of the plurality of lower module outer side members.

[0023] The lower module outer front cross member located on the front side of the battery bracket may be coupled to the lower side of the integrated battery front cross member, with a gasket interposed between the lower module outer front cross member and the lower side of the integrated battery front cross member. The lower module outer rear cross member located on the rear side of the battery bracket may be coupled to the lower side of the integrated battery rear cross member for sealing the rear side of the battery accommodating space, with a gasket interposed between the lower module outer rear cross member and the lower side of the integrated battery rear cross member. The lower module outer side member of the battery bracket may be coupled to the lower side of the side beam, with a gasket interposed between the lower module outer side member and the lower side of the side beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0025] Figure 1 is a view showing the structure of an electric vehicle according to the present disclosure;

[0026] Figure 2 It shows in detail Figure 1 a view of the front portion of the vehicle body shown in;

[0027] Figure 3 is to show that when different from Figure 2 A view of the front portion of the vehicle body when viewed from an angle in;

[0028] Figure 4 It shows Figure 2 Detailed view of the side rails removed;

[0029] Figure 5 It shows that along Figure 2A cross-sectional view taken along line VV in FIG.

[0030] Figure 6 It shows that along Figure 2 A cross-sectional view taken along line VI-VI in FIG.

[0031] Figure 7 is with Figure 5 A cross-sectional view of the rear portion of the vehicle body to which the structure shown is connected;

[0032] Figure 8 is a side view of the vehicle body of the present disclosure, showing that the load is transferred from the front side member toward the rear side of the vehicle body in a dispersed manner; and

[0033] Fig. 9 and Fig.10 is a bottom view of the vehicle body of the present disclosure, showing that the load is transmitted from the front side member toward the rear side of the vehicle body in a dispersed manner. DETAILED DESCRIPTION

[0034] Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, and even if the same or similar elements are shown in different drawings, they are denoted by the same reference numerals and redundant description thereof will be omitted.

[0035] In the following description, regarding constituent elements used in the following description, suffixes “module” and “unit” thereof are used only for convenience of description and have no meanings or functions distinguished from each other.

[0036] In the following description of the embodiments disclosed in this specification, when the known functions and configurations incorporated herein may make the subject matter of the embodiments disclosed in this specification unclear, their detailed description will be omitted. In addition, the drawings provided are only used to better understand the embodiments disclosed in this specification, and are not intended to limit the technical concepts disclosed in this specification. Therefore, it should be understood that the drawings include all modifications, equivalents and substitutions within the scope and spirit of the present disclosure.

[0037] It should be understood that although the terms "first", "second", etc. may be used herein to describe multiple components, these components should not be limited by these terms. These terms are only used to distinguish one component from another component.

[0038] It should be understood that when a component is referred to as being “connected to” or “coupled to” another component, it may be directly connected to or coupled to the other component, or intervening components may be present. On the other hand, when a component is referred to as being “directly connected to” or “directly coupled to” another component, there are no intervening components.

[0039] As used herein, singular forms are intended to include plural forms as well, unless the context clearly indicates otherwise.

[0040] It should also be understood that when used herein, the terms “includes,” “comprising,” “containing,” and / or “comprising” specify the presence of stated features, integers, steps, operations, elements, parts, or combinations thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

[0041] Reference Figures 1 to 10 According to an embodiment of the present disclosure, the electric vehicle structure includes: a side beam 1, which is arranged on both sides of the vehicle body; a floor panel 3, whose two side ends are fixed to the side beam 1; a battery bracket 7, which is connected to the lower side of the side beam 1 to define a battery accommodating space 5 together with the floor panel 3; an integrated battery front cross member 9, which extends in the lateral direction of the vehicle body to be connected to the side beam 1 at its two ends and connect the front side of the battery bracket 7 to the floor panel 3; and an instrument panel cross member 11, which is connected to the front upper side of the floor panel 3 and the integrated battery front cross member 9 and extends in the lateral direction of the vehicle body.

[0042] That is, in the electric vehicle structure disclosed herein, the floor panel 3 and the battery bracket 7 are used to form the upper and lower sides of the battery accommodating space 5, the side beam 1 is used to form the two sides of the battery accommodating space 5, and the integrated battery front cross member 9 and the integrated battery rear cross member 13 are used to seal the front and rear sides of the battery accommodating space 5.

[0043] According to the present disclosure, unlike conventional technologies, there is no structure such as a separate battery pack that accommodates battery cells. That is, the floor panel 3 and the side beam 1, which are basic components of the vehicle body, form a battery accommodation space 5 that accommodates the battery cells, whereby the battery cells are directly installed in the vehicle body. Therefore, more battery cells can be installed in a vehicle body of a given size, and since unnecessary components are eliminated, the weight of the vehicle can be reduced. Therefore, the electric vehicle structure of the present disclosure can greatly contribute to increasing the cruising range of the vehicle.

[0044] The instrument panel cross member 11 has a cross-sectional shape in which a plurality of closed cross sections are connected to each other, and is provided to protrude in front of the instrument panel 15 .

[0045] Furthermore, the instrument panel cross member 11 has a shape covering both the upper surface of the floor panel 3 and the front surface of the integrated-battery front cross member 9 , and is coupled to the floor panel 3 and the integrated-battery front cross member 9 .

[0046] Therefore, the instrument panel cross member 11 has a strong structural property that resists impact by dispersing the impact from the front side of the vehicle body to the battery-integrated front cross member 9 and the floor panel 3 .

[0047] The front side member 17 is connected to the front side of the instrument panel cross member 11 , and the instrument panel cross member 11 is connected at both ends thereof to the A-pillars 19 , which are coupled at the lower ends thereof to the side sills 1 .

[0048] That is, the lower end of the A-pillar 19 is coupled to the upper side of the side sill 1 , and both end portions of the instrument panel cross member 11 are connected to the side sill 1 and the A-pillar 19 .

[0049] For reference purposes, only the lower portion of the A-pillar 19 is shown in the drawings.

[0050] In this embodiment, the instrument panel cross member 11 is connected to the A-pillar 19 via an instrument panel cross extension 21 .

[0051] The instrument panel cross extensions 21 are members that are provided on both sides of the instrument panel cross member 11 and extend from the instrument panel cross member 11 in the lateral direction and the rearward direction so as to be connected to the A-pillars 19 and the side members 1 .

[0052] The front side member 17 is coupled to the instrument panel cross member 11 through a front rear lower member 23 coupled to the rear side of the front side member 17 , and the front rear lower member 23 is coupled to the instrument panel cross member 11 and the integrated-battery front cross member 9 at the rear side thereof.

[0053] Therefore, the load applied from the front side of the vehicle body through the front side member 17 is supported by the instrument panel cross member 11 through the front-side rear lower member 23 , and is also supported by the battery-integrated front cross member 9 .

[0054] Furthermore, the instrument panel cross member 11 is provided to have a cross-sectional shape extending from the front upper side of the integrated battery front cross member 9 and the floor panel 3 toward the rear side of the front side member 17. The front rear lower member 23 is formed to extend from the rear side of the front side member 17 and expand in the up-down direction to cover the front side, the upper side, and the lower side of the instrument panel cross member 11.

[0055] Therefore, the load applied from the front side of the vehicle body through the front side member 17 is transmitted downward from the front side rear lower member 23 toward the instrument panel cross member 11 and the battery-integrated front cross member 9 , and also transmitted upward in a dispersed manner to be supported by the A-pillar 19 .

[0056] Furthermore, a side extension member 25 coupled to the front rear lower member 23 and the instrument panel cross member 21 is provided to connect the front side member 17 to the A-pillar 19 and define a closed space around an end portion of the instrument panel cross member 11 .

[0057] These instrument panel lateral extension portions 21 are integrally formed with an upper extension member portion 27 and a lower extension member portion 29, wherein the upper extension member portion is in a curved shape extending from the front side of the vehicle body toward the rear upper side of the vehicle body and defines a closed space together with the side extension member 25, and the lower extension member portion is in a curved shape extending from the front side of the vehicle body toward the rear lower side of the vehicle body.

[0058] Furthermore, the side extension member 25 is integrally formed with a side front upper extension member portion 31 having a curved shape extending from the front side of the vehicle body toward the rear upper side of the vehicle body and corresponding to the upper extension member portion 27 of the instrument panel transverse extension portion 21 .

[0059] Therefore, the load applied from the front side of the vehicle body through the front side member 17 is firmly supported by the closed space structure formed by the front side rear lower member 23, the instrument panel lateral extension 21 and the side extension member 25. In particular, the curved cross-sectional structure formed by the upper extension member portion 27, the lower extension member portion 29 and the side front upper extension member portion 31 effectively supports the load transmitted toward the rear side of the vehicle body through the front side member 17 in a dispersed manner as described above, thereby ensuring high structural rigidity, that is, improving the performance of the vehicle against frontal collisions. This means that the battery unit arranged behind the integrated battery front lateral member 9 can be more safely protected.

[0060] Depend on Figure 8 and Fig.10 The arrows in denoted the transmission of the load applied from the front side of the vehicle body toward the rear side of the vehicle body in a dispersed manner through the front side member 17 .

[0061] The front subframe 33 is provided below the front side member 17 , and a rear end portion of the front subframe 33 is mounted to be supported on the lower side of the instrument panel cross member 11 .

[0062] In this embodiment, the rear end portion of the front subframe 33 is supported on the lower side of the instrument panel cross member 11 by a front subframe mounting bracket 35 .

[0063] Therefore, in the event of a frontal collision of the vehicle, the front subframe mounting bracket 35 and the instrument panel cross member 11 prevent the front subframe 33 from being pushed rearward.

[0064] For reference, electric drive components such as a motor are mounted on the front subframe 33 .

[0065] Meanwhile, the battery bracket 7 is provided with a battery lower module inner cross member 37 which is spaced rearward from the integrated battery front cross member 9 and extends in the transverse direction of the vehicle body, and the floor panel 3 is provided with a floor cross member 39 which is provided on the battery lower module inner cross member 37 and extends in the transverse direction of the vehicle body. The floor cross member 39 is coupled to the battery lower module inner cross member 37.

[0066] Furthermore, an instrument panel upper member 41 extending in the front-rear direction of the vehicle body is coupled between the instrument panel cross member 11 and the floor cross member 39 .

[0067] Therefore, a rigid structure is formed such that the coupling structure of the instrument panel cross member 11 and the integrated battery front cross member 9 is connected to the coupling structure of the floor cross member 39 and the battery lower module inner cross member 37 in the front-rear direction through the instrument panel upper member 41 .

[0068] Therefore, if Fig.10 As shown, the load transferred from the front side of the vehicle body to the rear side of the vehicle body is effectively dispersed and supported by the grid structure formed by the integrated battery front cross member 9 and the cross member 37 in the battery lower module, thereby more effectively protecting the battery unit arranged behind the integrated battery front cross member 9.

[0069] For reference, in Figure 8 and Fig.10 The transfer of loads is indicated by arrows.

[0070] Here, it is preferred that a battery receiving space 5 for substantially receiving the battery cells is provided behind the cross member 37 in the battery lower module.

[0071] That is, although the space in front of the cross member 37 in the battery lower module is a space defined on the battery bracket 7, battery-related electrical components such as a battery management system (BMS) or a power relay assembly (PRA) are preferably arranged in the space in front of the cross member 37 in the battery lower module, rather than directly in the battery cell, so as to avoid or minimize direct impact on the battery cell in the event of an accident (such as a head-on collision of the vehicle).

[0072] Meanwhile, in the present embodiment, the floor panel 3 is formed of an extruded material into a shape in which a plurality of closed sections are connected to each other. The floor cross member 39 is integrally formed by the floor panel 3 using the highest protruding closed section among the closed sections of the floor panel 3 .

[0073] Of course, the floor cross member 39 may be provided separately from the floor panel 3. However, when the floor cross member 39 is formed integrally with the floor panel 3 as in the present disclosure, a simpler and stronger structure can be formed.

[0074] The battery bracket 7 is provided with a lower module outer side member 43, a lower module outer front cross member 45, and a lower module outer rear cross member 47 to surround the outer periphery of the battery accommodating space 5. A gasket 49 is provided on the upper surface of the lower module outer side member 43, the upper surface of the lower module outer front cross member 45, and the upper surface of the lower module outer rear cross member 47.

[0075] The lower module outer front cross member 45 located on the front side of the battery bracket 7 is connected to the lower side of the integrated battery front cross member 9, and the pad 49 is interposed between the lower module outer front cross member and the lower side of the integrated battery front cross member. The lower module outer rear cross member 47 located on the rear side of the battery bracket 7 is connected to the lower side of the integrated battery rear cross member 13, and the pad 49 is interposed between the lower module outer rear cross member and the lower side of the integrated battery rear cross member. The lower module outer side member 43 of the battery bracket 7 is connected to the lower side of the side beam 1, and the pad 49 is interposed between the lower module outer side member and the lower side of the side beam.

[0076] For reference, the gasket 49 is coupled in a compressed state between the lower module outer front cross member 45 and the integrated battery front cross member 9, between the lower module outer rear cross member 47 and the integrated battery rear cross member 13, and between the lower module outer side member 43 and the side beam 1. However, it is difficult to represent such a coupling structure of the gasket 49 in the drawings, and therefore the gasket 49 is shown protruding toward the integrated battery front cross member 9, the integrated battery rear cross member 13, and the side beam 1 located above the battery bracket 7.

[0077] As described above, since the upper side of the entire outer periphery of the battery bracket 7 is coupled to the integrated-battery front cross member 9, the integrated-battery rear cross member 13, and the side beam 1 with the gasket 49 interposed therebetween, the watertightness of the battery accommodating space 5 can be ensured.

[0078] As is apparent from the above description, the present disclosure provides an electric vehicle structure that can increase the cruising range of the vehicle by increasing the number of batteries installed in the vehicle while minimizing the increase in vehicle body weight and ensuring the performance of the vehicle against various types of collisions.

[0079] Although the preferred embodiments of the present disclosure have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the disclosure as disclosed in the accompanying claims.

Claims

1. An electric vehicle structure, comprising: a first side beam disposed on a first side of the vehicle body and a second side beam disposed on a second side of the vehicle body; a floor panel having a first side end portion fixed to the first side beam and a second side end portion fixed to the second side beam; a battery bracket coupled to a lower side of each of the first side member and the second side member to define a battery accommodation space together with the floor panel; an integrated battery front cross member extending in the lateral direction of the vehicle body, the integrated battery front cross member being coupled to the first side member at one end and to the second side member at the other end, and the integrated battery front cross member connecting the front side of the battery bracket with the floor panel; as well as An instrument panel cross member connected to the floor panel and to a front upper side of the integrated-battery front cross member, the instrument panel cross member extending in a lateral direction of the vehicle body.

2. The electric vehicle structure according to claim 1, wherein: The instrument panel cross member has a cross-sectional shape in which a plurality of closed cross sections are connected to each other, and is configured to protrude outward from an instrument panel.

3. The electric vehicle structure according to claim 1, wherein: The instrument panel cross member has a shape covering both an upper surface of the floor panel and a front surface of the integrated-battery front cross member, and is coupled to the floor panel and the integrated-battery front cross member.

4. The electric vehicle structure according to claim 3, further comprising a plurality of front side members connected to the front side of the instrument panel cross member, in, The instrument panel cross member is connected at a first end to a first A-pillar coupled to the first side beam, and is connected at a second end to a second A-pillar coupled to the second side beam.

5. The electric vehicle structure according to claim 4, further comprising a front subframe, the front subframe being disposed below the plurality of the front side members, in, The front subframe is installed so that a rear end portion of the front subframe is supported on a lower side of the instrument panel cross member.

6. The electric vehicle structure according to claim 4, wherein: The instrument panel cross member is connected to the first A-pillar and the second A-pillar via an instrument panel cross extension.

7. The electric vehicle structure according to claim 6, wherein: The plurality of front side members are coupled to the instrument panel cross member through a plurality of front side rear lower members coupled to rear sides of the front side members, and Wherein, a plurality of the front side rear lower members are coupled to the instrument panel cross member and the integrated battery front cross member at rear sides of the front side rear lower members.

8. The electric vehicle structure according to claim 7, wherein: The instrument panel cross member has a cross-sectional shape extending from the front upper side of the integrated battery front cross member and the floor panel toward the rear side of the plurality of front side members, and The plurality of front side rear lower members extend from rear sides of the plurality of front side members and expand in a vertical direction to cover the front side, the upper side and the lower side of the instrument panel cross member.

9. The electric vehicle structure according to claim 8 further includes a plurality of side extension members, which are connected to a plurality of the front side rear lower members and to the instrument panel transverse extension portion to connect the plurality of front side members to the first A-pillar and the second A-pillar and define a closed space around the end portion of the instrument panel transverse member.

10. The electric vehicle structure according to claim 9, wherein: The instrument panel lateral extension portion is integrally formed with an upper extension member portion and a lower extension member portion, the upper extension member portion is in a curved shape extending from the front side of the vehicle body toward the rear upper side of the vehicle body, and the upper extension member portion together with the side extension member defines a closed space, and the lower extension member portion is in a curved shape extending from the front side of the vehicle body toward the rear lower side of the vehicle body.

11. The electric vehicle structure according to claim 10, wherein: The side extension member is integrally formed with a side front upper extension member portion having a curved shape extending from the front side of the vehicle body toward the rear upper side of the vehicle body and corresponding to the upper extension member portion of the instrument panel transverse extension portion.

12. The electric vehicle structure according to claim 3, wherein: The battery bracket is provided with a battery lower module inner cross member, the battery lower module inner cross member is spaced rearward from the integrated battery front cross member and extends in the transverse direction of the vehicle body, wherein the floor panel comprises a floor cross member, the floor cross member being arranged on the battery lower module inner cross member and extending in the transverse direction of the vehicle body, and Wherein, the floor cross member is connected to the cross member in the lower battery module. 13 . The electric vehicle structure according to claim 12 , further comprising an upper dashboard member extending in a front-rear direction of the vehicle body and coupled between the dashboard cross member and the floor cross member.

14. The electric vehicle structure according to claim 12, wherein: The floor panel is formed of an extruded material into a shape in which a plurality of closed cross sections are connected to each other, and The floor cross member is integrally formed by the floor panel using the highest protruding closed section among the plurality of closed sections of the floor panel.

15. The electric vehicle structure of claim 12, wherein: The battery accommodating space is arranged behind the cross member in the battery lower module.

16. The electric vehicle structure of claim 3, wherein: The battery bracket is provided with a lower module outer front cross member, a lower module outer rear cross member and a plurality of lower module outer side members to surround the outer periphery of the battery accommodation space, and The electric vehicle structure further includes a gasket disposed on an upper surface of the lower module outer front cross member, an upper surface of the lower module outer rear cross member, and each of upper surfaces of a plurality of lower module outer side members.

17. The electric vehicle structure of claim 16, wherein: The lower module outer front cross member located on the front side of the battery bracket is coupled to the lower side of the integrated battery front cross member, with the gasket between the lower module outer front cross member and the lower side of the integrated battery front cross member, wherein the lower module outer rear cross member located on the rear side of the battery bracket is coupled to the lower side of the integrated battery rear cross member for sealing the rear side of the battery accommodating space, and the gasket is provided between the lower module outer rear cross member and the lower side of the integrated battery rear cross member, and The plurality of lower module outer members of the battery bracket are coupled to lower sides of the first side beam and the second side beam, and the gasket is provided between the plurality of lower module outer members and the lower sides of the first side beam and the second side beam.

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