Electric vehicle structure

Abstract

An electric vehicle structure includes: a bottom plate including an upper side wall and a lower side wall spaced apart from each other, the bottom plate configured to cover an upper side of a battery accommodating space; a lower side member combined with two opposite end portions of the bottom plate to form a battery accommodating space; a floor drain hole extending through an upper side wall of the floor; and a lower side member discharge hole provided in the lower side member and configured to communicate with a space between the upper side wall and the lower side wall of the floor panel.

Description

Technical Field

[0001] The present invention relates to a technology related to a vehicle body structure of an electric vehicle equipped with a battery. Background Art

[0002] The electric vehicle is configured to travel by operating an electric motor using electric power supplied from a battery installed in the vehicle.

[0003] Therefore, the driving range of a vehicle depends largely on the energy storage capacity of the battery installed in the vehicle.

[0004] The main issues in the development of electric vehicles are to ensure the various collision response performances required of the vehicle while installing batteries on the vehicle to store as much electrical energy as possible.

[0005] In order to increase the number of battery cells installed in a vehicle, a CTB (Cell To Body) vehicle structure has recently been developed in which a battery cell is directly installed on a vehicle body.

[0006] The battery accommodation space is provided in this way so that the battery unit is placed directly below the vehicle body floor. Therefore, the floor has a structure that completely seals the upper side of the battery accommodation space.

[0007] However, there is a problem that, in the electrocoating process in which the vehicle body is coated through the electrophoresis channel, it is difficult to discharge the coating liquid from the bottom plate having the structure of completely closing the upper side of the battery accommodating space as described above.

[0008] The above is provided as background information only to assist with understanding the context of embodiments of the present invention and it is not intended that this information constitutes prior art available to the public. Summary of the invention

[0009] Accordingly, an embodiment of the present invention takes into account the problems arising in the related art, and an embodiment of the present invention provides an electric vehicle structure that allows liquid materials such as coating liquid to be properly discharged to the lower side of the floor of the vehicle body (a battery accommodating space is formed on the lower side of the floor), thereby allowing the coating process to proceed smoothly.

[0010] According to an embodiment, an electric vehicle structure is provided, including: a floor having an upper side wall and a lower side wall spaced apart from each other, the floor being configured to cover the upper side of a battery accommodating space; a lower longitudinal beam combined with two opposite ends of the floor to form the battery accommodating space; a floor drain hole formed to pass through the upper side wall of the floor; and a lower longitudinal beam drain hole formed in the lower longitudinal beam and configured to communicate with a space between the upper side wall and the lower side wall of the floor.

[0011] The upper side wall of the bottom plate may include a base plate portion and a protruding plate portion protruding upward relative to the base plate portion, and the bottom plate discharge hole may be formed in the base plate portion.

[0012] The floor panel may be constructed by connecting a plurality of partial panels having base plate portions and protruding plate portions in the front-rear direction of the vehicle body, and the base plate portion of at least one of two partial panels connected to each other may be connected to the other partial panel.

[0013] The floor drain hole may be formed in the base plate portion on a connection portion between two partial plates connected to each other.

[0014] The side sill drain hole formed in the side sill may be provided as a plurality of side sill drain holes, and one or more of the side sill drain holes may communicate with the outside of the vehicle body.

[0015] The side sill drain hole communicating with the outside of the vehicle body may include one or more lateral drain holes formed throughly in the lateral direction of the vehicle body and a lower drain hole formed throughly downward.

[0016] The side sill may have a cross-sectional structure including a plurality of ribs, and the side sill drain hole may be formed to pass through all of the ribs of the side sill so that a space between upper and lower side walls of the floor can communicate with the lateral drain hole or the lower drain hole.

[0017] The lower longitudinal beam may have a cross-sectional structure including a plurality of vertical ribs and a plurality of horizontal ribs, an upper surface of a middle horizontal rib among the horizontal ribs may be coupled to a lower surface of the lower side wall of the floor, and the lower longitudinal beam discharge hole may be formed in a horizontal direction to pass through the plurality of vertical ribs connected to the upper surface of the middle horizontal rib.

[0018] The integrated battery front cross beam can be arranged on the front side of the bottom plate and cover the front side of the battery accommodating space, the integrated battery rear cross beam can be arranged on the rear side of the bottom plate and cover the rear side of the battery accommodating space, and the battery lower module can be arranged below the integrated battery front cross beam, the integrated battery rear cross beam and the lower longitudinal beam and cover the lower side of the battery accommodating space.

[0019] The bottom plate can be formed by connecting multiple partial plates made of extruded material in the front-to-rear direction of the vehicle body, the integrated battery front cross beam can be formed as one body with the frontmost partial plate among the multiple partial plates, and the integrated battery rear cross beam can be formed as one body with the rearmost partial plate among the multiple partial plates.

[0020] The battery lower module may include a lower plate, which is configured to cover the lower side of the battery accommodating space; a front cross beam around the lower module, which is coupled to the upper side of the lower plate and to the lower side of the front cross beam of the integrated battery; a rear cross beam around the lower module, which is coupled to the upper side of the lower plate and to the lower side of the rear cross beam of the integrated battery; and a lower longitudinal beam around the lower module, which is coupled to the upper side of the lower plate and to the lower side of the lower longitudinal beam.

[0021] The battery lower module can be combined with the gasket inserted between the integrated battery front cross beam, the integrated battery rear cross beam and the lower longitudinal beam.

[0022] The floor panel may have a structure in which a cross-sectional shape has a plurality of partition walls connecting the upper side wall and the lower side wall and is elongated in a transverse direction of the vehicle body.

[0023] According to an embodiment of the present invention, a liquid material such as a coating liquid may be appropriately discharged toward the lower side of a floor panel of a vehicle body having a battery receiving space formed at the lower side thereof, thereby smoothly performing a coating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a view showing a structure of an electric vehicle according to an embodiment of the present invention;

[0025] Figure 2 is along Figure 1 A cross-sectional view taken along line II-II in FIG.

[0026] Figure 3 It is shown Figure 2 Detailed view of the front side of the base plate in;

[0027] Figure 4 It is shown Figure 2 Detailed view of the middle portion of the bottom plate;

[0028] Figure 5 It is shown Figure 2 Detailed view of the rear side of the base plate in FIG.

[0029] Figure 6 is along Figure 1 A cross-sectional view taken along line VI-VI in FIG.

[0030] Figure 7 is along Figure 1 Cross-sectional view taken along line VII-VII. DETAILED DESCRIPTION

[0031] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same or similar constituent elements are given the same reference numerals, and their repeated descriptions are omitted.

[0032] For convenience of description, the suffixes “module,” “unit,” “part,” and “section” used to describe constituent elements in the following description may be used together or interchangeably, but the suffixes themselves do not have distinguishable meanings or functions.

[0033] In the description of the embodiments of the present invention, when it is determined that the specific description of the known related art may obscure the subject of the embodiments of the present invention, the specific description may be omitted. In addition, it should be understood that the drawings are provided only to make it easy for those skilled in the art to understand the embodiments of the present invention, and the subject matter of the present invention is not limited by the drawings, and includes all changes, equivalent forms and substitutions included in the spirit and technical scope of the present invention.

[0034] Terms including ordinal numbers such as "first", "second", etc. may be used to describe various constituent elements, but these constituent elements are not limited by these terms. These terms are only used to distinguish one constituent element from another constituent element.

[0035] When a constituent element is described as being “bound to” or “connected to” another constituent element, it should be understood that the constituent element may be directly bound to or connected to another constituent element, and that an intervening constituent element may exist between the constituent elements. When a constituent element is described as being “directly bound to” or “directly connected to” another constituent element, it should be understood that there is no intervening constituent element between the constituent elements.

[0036] A singular expression includes a plural expression unless there is a clear description of a different meaning in the context.

[0037] In this specification, the terms "comprises", "includes", "contains", "including", "containing", "has", "has" or other variations thereof should be understood as the presence of the described features, integers, steps, operations, elements, components, or combinations thereof in this specification, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

[0038] refer to Figures 1 to 7 , the electric vehicle structure according to an embodiment of the present invention includes: a floor panel 7 having an upper side wall 1 and a lower side wall 3 spaced apart from each other and configured to cover the upper side of a battery accommodating space 5; lower longitudinal beams 9 respectively coupled to two opposite ends of the floor panel 7 to form the battery accommodating space 5; (multiple) floor panel drain holes 11 formed to penetrate the upper side wall 1 of the floor panel 7; and (multiple) lower longitudinal beam drain holes 13 formed in the lower longitudinal beam 9 to communicate with the space between the upper side wall 1 and the lower side wall 3 of the floor panel 7.

[0039] That is, a plurality of battery cells installed in the vehicle are accommodated in the battery accommodation space 5. The upper side and both opposite sides of the battery accommodation space 5 are covered by the floor panel 7 and the lower side beam 9. The floor panel drain hole 11 may be formed in the upper side wall 1 constituting the floor panel 7 so that a liquid material (such as a coating liquid) existing on the upper side of the floor panel 7 may flow through the floor panel drain hole 11. The lower side beam drain hole 13 may be formed in the lower side beam 9 combined with the floor panel 7 so that the liquid material flowing through the floor panel drain hole 11 may be finally discharged to the outside of the vehicle body through the lower side beam drain hole 13.

[0040] The upper side wall 1 of the bottom plate 7 includes a base plate portion 15 and a protruding plate portion 17 protruding upward from the base plate portion 15 , and the bottom plate discharge hole 11 is formed in the base plate portion 15 .

[0041] That is, the upper side wall 1 of the bottom plate 7 has two heights. The protruding plate portion 17 protrudes upward from the base plate portion 15 to form a relatively high height, and the bottom plate discharge hole 11 is formed in the base plate portion 15 having a relatively low height.

[0042] Therefore, as a result, in the configuration of the bottom plate 7 having the above-described protruding plate portion 17 and the base plate portion 15 , the base plate portion 15 defines a groove between the two protruding plate portions 17 , and the bottom plate discharge hole 11 is formed in the base plate portion 15 forming the groove.

[0043] Therefore, the liquid material flows downward from the protruding plate portion 17 of the bottom plate 7 and enters the base plate portion 15 defining the groove, and the liquid material flows downward through the bottom plate discharge hole 11 of the base plate portion 15 .

[0044] The floor panel 7 is formed by connecting a plurality of partial panels 19 having base panels 15 and protruding panels 17 in the vehicle body front-rear direction. At least one of the two partial panels 19 connected to each other may have a structure in which the base panel 15 is connected to the other partial panel 19.

[0045] In this case, the floor drain hole 11 is formed in the base plate portion 15 at the connection portion between two partial plates 19 connected to each other.

[0046] The partial panels 19 may be configured as an extruded material having a cross-sectional shape of a plurality of partition walls connecting the upper side wall 1 and the lower side wall 3 and extending in the lateral direction of the vehicle body. The floor panel 7 may be formed by combining a plurality of partial panels 19 .

[0047] Meanwhile, a plurality of side sill drain holes 13 are formed in the side sill 9. One or more side sill drain holes 13 communicate with the outside of the vehicle body.

[0048] The side sill drain hole 13 communicating with the outside of the vehicle body includes one or more lateral drain holes 21 formed through in the lateral direction of the vehicle body and lower drain holes 23 formed through downward.

[0049] Therefore, the liquid material flowing downward through the floor drain holes 11 of the floor panel 7 is finally drained to the outside of the vehicle body through the lateral drain holes 21 and the lower drain holes 23 .

[0050] In this embodiment, the side sill 9 has a cross-sectional structure including a plurality of ribs. The side sill discharge hole 13 is formed to pass through all the ribs of the side sill 9 so that the space between the upper side wall 1 and the lower side wall 3 of the floor panel 7 can communicate with the lateral discharge hole 21 or the lower discharge hole 23.

[0051] That is, the side member 9 has a cross-sectional structure including a plurality of vertical ribs 25 and a plurality of horizontal ribs 27. An upper surface of a middle horizontal rib 29, which is one of the horizontal ribs 27, is bonded to a lower surface of the lower side wall 3 of the floor panel 7, and the side member discharge hole 13 is formed in a horizontal direction through the plurality of vertical ribs 25 connected to the upper surface of the middle horizontal rib 29.

[0052] Therefore, the liquid material introduced into the bottom plate drain hole 11 flows along the space between the upper side wall 1 and the lower side wall 3, flows through the lower longitudinal beam drain hole 13 on the upper side of the middle horizontal rib 29 and the upper surface of the middle horizontal rib 29, and is discharged to the outside through the lateral drain hole 21 or the lower drain hole 23.

[0053] Liquid material such as coating liquid existing on the upper side of the floor panel 7 can be easily and smoothly discharged to the vehicle body exterior through the floor panel discharge hole 11 and the side sill discharge hole 13 , so that processes such as the electro-coating process can be smoothly performed.

[0054] At the same time, the integrated battery front cross beam 31 is arranged on the front side of the bottom plate 7 and covers the front side of the battery accommodating space 5. The integrated battery rear cross beam 33 is arranged on the rear side of the bottom plate 7 and covers the rear side of the battery accommodating space 5. The battery lower module 35 is arranged below the integrated battery front cross beam 31, the integrated battery rear cross beam 33 and the lower longitudinal beam 9, and covers the lower side of the battery accommodating space 5.

[0055] The floor panel 7 is formed by connecting a plurality of partial panels 19 made of an extruded material in the front-rear direction of the vehicle body. The partial panel 19 located at the frontmost side among the plurality of partial panels 19 may be provided integrally with the integrated battery front cross member 31. The partial panel 19 located at the rearmost side among the plurality of partial panels 19 may be provided integrally with the integrated battery rear cross member 33.

[0056] Therefore, the process of combining the integrated battery front beam 31 and the bottom plate 7 and the process of combining the integrated battery rear beam 33 and the bottom plate 7 can be omitted, so that the required watertightness between them can be basically ensured and the structural rigidity of the bottom plate 7 can be improved.

[0057] The battery lower module 35 includes: a lower plate 37, which is configured to cover the lower side of the battery accommodating space 5; a lower module peripheral front cross beam 39, which is coupled to the upper side of the lower plate 37 and to the lower side of the integrated battery front cross beam 31; a lower module peripheral rear cross beam 41, which is coupled to the upper side of the lower plate 37 and to the lower side of the integrated battery rear cross beam 33; and a lower module peripheral lower longitudinal beam 43, which is coupled to the upper side of the lower plate 37 and to the lower side of the lower longitudinal beam 9.

[0058] The lower battery module 35 is combined in a state where the gasket 45 is inserted between the integrated battery front cross beam 31 , the integrated battery rear cross beam 33 and the lower longitudinal beam 9 .

[0059] Therefore, the battery accommodating space 5 may have a structure that is completely sealed by a bottom plate 7 located on the upper side, a battery lower module 35 located on the lower side, an integrated battery front cross beam 31 located on the front side, and an integrated battery rear cross beam 33 located on the rear side, thereby safely protecting the battery cells accommodated in the battery accommodating space 5.

[0060] For reference, the gasket 45 is compressed between the integrated battery front cross member 31, the integrated battery rear cross member 33, the lower side of the lower side member 9, the upper side of the lower module peripheral front cross member 39 of the battery lower module 35, the upper side of the lower module peripheral rear cross member 41, and the upper side of the lower module peripheral lower side member 43. However, since it is difficult to show this configuration in the drawings, a state is shown in which the gasket 45 protrudes upward while passing through the lower side of the integrated battery front cross member 31, the lower side of the integrated battery rear cross member 33, and the lower side of the lower side member 9.

[0061] While specific embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various modifications and variations may be made to the embodiments of the present invention without departing from the technical spirit of the invention as defined in the appended claims.

Claims

1. An electric vehicle structure, comprising: a bottom plate including an upper side wall and a lower side wall spaced apart from each other, the bottom plate being configured to cover an upper side of the battery receiving space; a lower longitudinal beam, which is combined with two opposite ends of the bottom plate to form the battery accommodation space; a bottom plate drain hole extending through the upper side wall of the bottom plate; and A side sill discharge hole is provided in the side sill and is configured to communicate with a space between the upper side wall and the lower side wall of the floor panel.

2. The electric vehicle structure according to claim 1, wherein: The upper side wall of the bottom plate comprises: Base plate; and The protruding plate portion protrudes upward relative to the base plate portion.

3. The electric vehicle structure according to claim 2, wherein: The floor drain hole is provided in the base plate portion.

4. The electric vehicle structure according to claim 2, wherein: The bottom plate is formed by connecting a plurality of partial plates including the base plate portion and the protruding plate portion in the front-rear direction of the vehicle body; and Among the plurality of partial panels, a base plate portion of at least one of two partial panels connected to each other is connected to another partial panel among the plurality of partial panels.

5. The electric vehicle structure according to claim 4, wherein: The floor drain opening is provided in a base plate portion at a connection between two part plates connected to each other.

6. The electric vehicle structure according to claim 1, wherein: At least one of the side sill discharge holes communicates with the outside of the vehicle body.

7. The electric vehicle structure according to claim 6, wherein: A plurality of side sill drain holes communicate with the outside of the vehicle body, and wherein the plurality of side sill drain holes include a lateral drain hole disposed through in a lateral direction of the vehicle body, and a lower drain hole disposed through downward.

8. The electric vehicle structure of claim 7, wherein: Each of the side sills has a cross-sectional structure including a plurality of ribs; and The plurality of side sill discharge holes are provided to pass through all of the ribs of the corresponding side sills so that a space between the upper side wall and the lower side wall of the floor panel can communicate with the lateral discharge hole or the lower discharge hole.

9. The electric vehicle structure of claim 7, wherein: Each of the lower side sills has a cross-sectional structure including a plurality of vertical ribs and a plurality of horizontal ribs; An upper surface of a middle horizontal rib among the plurality of horizontal ribs is bonded to a lower surface of the lower side wall of the bottom plate; and The plurality of side sill discharge holes are disposed in a horizontal direction to penetrate the plurality of vertical ribs connected to the upper surface of the middle horizontal rib.

10. The electric vehicle structure according to claim 1, wherein: The floor panel has a structure that is elongated in the lateral direction of the vehicle body and has a cross-sectional shape having a plurality of partition walls that connect the upper side wall and the lower side wall.

11. An electric vehicle structure comprising: a bottom plate including an upper side wall and a lower side wall spaced apart from each other, the bottom plate being configured to cover an upper side of the battery receiving space; a lower longitudinal beam, which is combined with two opposite ends of the bottom plate to form the battery accommodation space; a bottom plate drain hole extending through the upper side wall of the bottom plate; a side sill discharge hole provided in the side sill and configured to communicate with a space between the upper side wall and the lower side wall of the floor; An integrated battery front cross beam, which is arranged on the front side of the bottom plate and covers the front side of the battery accommodation space; An integrated battery rear cross beam, which is arranged on the rear side of the bottom plate and covers the rear side of the battery accommodating space; and The battery lower module is arranged below the integrated battery front cross beam, the integrated battery rear cross beam and the lower longitudinal beam and covers the lower side of the battery accommodating space.

12. The electric vehicle structure according to claim 11, wherein: The floor panel is constructed by connecting a plurality of partial panels, each of which includes an extruded material, in the front-rear direction of the vehicle body.

13. The electric vehicle structure of claim 12, wherein: The integrated battery front cross beam is formed integrally with the frontmost partial plate of the plurality of partial plates; and The integrated battery rear cross beam is formed as a whole with the rearmost partial plate among the plurality of partial plates.

14. The electric vehicle structure according to claim 11, wherein: The battery lower module comprises: a lower plate configured to cover a lower side of the battery receiving space; a lower module peripheral front cross beam, which is coupled to the upper side of the lower plate and to the lower side of the integrated battery front cross beam; a lower module peripheral rear cross beam coupled to the upper side of the lower plate and to the lower side of the integrated battery rear cross beam; and The lower module peripheral lower side beam is coupled to the upper side of the lower plate and to the lower side of the lower side beam.

15. The electric vehicle structure according to claim 11, wherein: The lower battery module is combined in a state where a gasket is inserted between the integrated battery front cross beam, the integrated battery rear cross beam, and the lower longitudinal beam.

16. The electric vehicle structure of claim 11, wherein: The floor panel has a structure that is elongated in the lateral direction of the vehicle body and has a cross-sectional shape having a plurality of partition walls that connect the upper side wall and the lower side wall.

17. The electric vehicle structure of claim 11, wherein: At least one of the side sill discharge holes communicates with the outside of the vehicle body.

18. The electric vehicle structure of claim 17, wherein: A plurality of side sill drain holes communicate with the outside of the vehicle body, and wherein the plurality of side sill drain holes include a lateral drain hole disposed through in a lateral direction of the vehicle body and a lower drain hole disposed through downward.

19. The electric vehicle structure of claim 18, wherein: Each of the side sills has a cross-sectional structure including a plurality of ribs; and The plurality of side sill discharge holes are provided to pass through all of the ribs of the corresponding side sills so that a space between the upper side wall and the lower side wall of the floor panel can communicate with the lateral discharge hole or the lower discharge hole.

20. The electric vehicle structure of claim 18, wherein: Each of the lower side sills has a cross-sectional structure including a plurality of vertical ribs and a plurality of horizontal ribs; An upper surface of a middle horizontal rib among the plurality of horizontal ribs is bonded to a lower surface of the lower side wall of the bottom plate; and The plurality of side sill discharge holes are disposed in a horizontal direction to penetrate the plurality of vertical ribs connected to the upper surface of the middle horizontal rib.

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