Electric vehicle structure

Abstract

An electric vehicle structure includes: a chassis frame having a first closed bend surrounding a battery accommodating space; a water-tight panel having another closed bent portion surrounding an inner side of the closed bent portion, the closed bent portion surrounding a battery accommodating space of the chassis frame; an upper cover coupled to an upper side of the water-tight panel and covering an upper side of the battery accommodating space; and a lower cover member coupled to a lower side of the water-tight panel and covering a lower side of the battery accommodating space.

Description

Technical Field

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

[0002] The electric vehicle is provided with a motor configured to generate power for driving the vehicle and is provided with a battery that stably supplies power to the motor.

[0003] The battery is generally installed in a vehicle in the form of a battery pack, and the battery pack accommodates a plurality of battery modules in a pack case. The battery module has a shape in which a plurality of battery cells are stacked.

[0004] Typically, the battery pack is separately mounted on the lower side of the vehicle body.

[0005] Meanwhile, since the drivable distance of an electric vehicle greatly depends on the number of battery modules installed in the vehicle, the vehicle needs to be able to accommodate as many battery modules as possible.

[0006] Furthermore, the battery module mounted in the vehicle needs to be accommodated in a watertight space to prevent external foreign matter, such as moisture, from penetrating therein.

[0007] The information included in this background of the disclosure is only for enhancement of understanding of the general background of the disclosure and should not be considered as an acknowledgement or in any form of suggestion that this information forms the prior art already known to a person skilled in the art. Summary of the invention

[0008] Various aspects of the present disclosure are directed to providing an electric vehicle structure that can effectively increase the vehicle's drivable distance by maximizing the number of battery modules to be installed while reducing the vehicle's weight and achieving efficient space utilization, and the electric vehicle structure uses a relatively simple configuration to reliably ensure the watertightness of the space that accommodates the battery modules.

[0009] In order to achieve the above-mentioned objectives, various aspects of the present disclosure are intended to provide an electric vehicle structure, which includes: a chassis frame having a first closed curve portion surrounding a battery accommodating space; a watertight panel having a second closed curve portion surrounding the inner side of the first closed curve portion, and the first closed curve portion surrounds the battery accommodating space of the chassis frame; an upper cover connected to the upper side of the watertight panel and covering the upper side of the battery accommodating space; and a lower cover connected to the lower side of the watertight panel and covering the lower side of the battery accommodating space.

[0010] A closed curved portion of a battery accommodating space surrounding a chassis frame is defined by a central side member disposed at opposite first and second sides of the chassis frame of the vehicle and extending in the front-rear direction of the vehicle, and by front and rear cross beams connecting the central side members at the opposite first and second sides, extending in the lateral direction of the vehicle, and spaced apart from each other in the front-rear direction of the vehicle.

[0011] The watertight panel may be formed such that an inclined wall extending along an inner surface of the center side member, an inner surface of the front cross member, and an inner surface of the rear cross member defines a second closed curved portion.

[0012] The inclined wall of the watertight panel may be inclined downward from an upper side of the battery receiving space toward the inside of the battery receiving space.

[0013] The flange portion may be provided on at least one of an upper end portion and a lower end portion of the inclined wall of the watertight panel, and the flange portion smoothly extends in a horizontal direction thereof.

[0014] At least one of the central side member, the front cross beam and the rear cross beam may include an inner wall, which is provided in the form of a vertical wall surface directed toward the watertight panel, and the mounting protrusion may be provided on the inner wall provided in the form of the vertical wall surface, and the mounting protrusion partially protrudes to be in surface contact with the inclined wall of the watertight panel.

[0015] A plurality of internal members may be provided in the watertight panel and traverse the inside of the battery accommodation space, and the mounting protrusion may be formed to face ends of the internal members.

[0016] An upper sealing strip may be installed at an upper end of the watertight panel and compressed against the upper cover to improve watertightness.

[0017] A lower sealing strip may be installed at a lower end of the watertight panel and compressed against the lower cover to improve watertightness.

[0018] In addition, in order to achieve the above-mentioned objectives, various aspects of the present disclosure are intended to provide an electric vehicle structure, which includes: a side member, which defines a first side and a second side opposite to the chassis frame; a plurality of cross beams, which connect the side members at the first side and the second side opposite to each other; a watertight panel, which is inserted into the closed curved portion defined by the side member and the cross beam, and the watertight panel is configured to define a closed curved surface with watertightness and a predetermined width in the up and down directions; and an upper cover, which is arranged to surround the upper side of a battery accommodating space, and the battery accommodating space is surrounded by the closed curved surface defined by the watertight panel.

[0019] The closed curved portion of the chassis frame may be defined by a central side member positioned between the front side member and the rear side member of the side members, a front cross member connecting first and second opposite ends of a front side of the central side member, and a rear cross member connecting first and second opposite ends of a rear side of the central side member.

[0020] A closed curved surface having a predetermined width in the up-down direction of the watertight panel may be defined by an inclined wall inclined downward from an upper side of the battery receiving space toward an inside of the battery receiving space.

[0021] The flange portion may be provided at an upper end portion of the inclined wall of the watertight panel, and the flange portion extends in a horizontal direction thereof.

[0022] An upper sealing strip may be provided at an upper end of the inclined wall of the watertight panel and compressed against the upper cover to improve watertightness.

[0023] The upper sealing strip may be arranged to be compressed against the inner side of the bent portion of the upper cover.

[0024] A lower cover may be disposed at a lower side of the watertight panel and surround a lower side of the battery accommodation space, and a lower sealing strip may be disposed at a lower end of an inclined wall of the watertight panel and compressed against the lower cover to improve watertightness.

[0025] The cooling panel may be disposed at a lower side of the inclined wall of the watertight panel and surround a lower side of the battery accommodating space, and the lower cover may be disposed at a lower side of the cooling panel and surround the lower side of the cooling panel.

[0026] The bottom portion may be integrated with the watertight panel and extend from a lower end portion of the inclined wall to seal a lower side of the battery receiving space.

[0027] At least one of the center side member, the front cross beam, and the rear cross beam facing the inclined wall of the watertight panel may include a mounting protrusion protruding to be partially in surface contact with the inclined wall.

[0028] A plurality of internal members may be provided in the watertight panel and have ends supported on the inclined wall of the watertight panel, and the mounting protrusions may be formed at positions facing the ends of the internal members.

[0029] According to an exemplary embodiment of the present invention, the drivable distance of a vehicle can be effectively increased by maximizing the number of battery modules to be installed while reducing the weight of the vehicle and achieving efficient space utilization, and a relatively simple configuration can be used to reliably ensure the watertightness of a space accommodating the battery modules.

[0030] The methods and apparatus of the present disclosure have other features and advantages that will be apparent from or set forth in more detail in the accompanying drawings and the following detailed description incorporated herein, which together serve to explain certain principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a view exemplarily showing a structure of an electric vehicle according to an exemplary embodiment of the present disclosure.

[0032] Figure 2 yes Figure 1 Top view of the floor plan.

[0033] Figure 3 yes Figure 1 Top view of the floor plan.

[0034] Figure 4 It is exemplarily shown Figure 1 View of the watertightness panels in the.

[0035] Figure 5 yes Figure 1 A detailed view of a part showing the state where the watertight panels are excluded.

[0036] Figure 6 2 is a view exemplarily showing a mounting protrusion formed on a center side member.

[0037] Figure 7 is along Figure 5 A cross-sectional view taken along line VII-VII in FIG.

[0038] Figure 8 is along Figure 5 A cross-sectional view taken along line VIII-VIII in FIG.

[0039] Fig. 9 It is a view for explaining a state in which an upper weather strip and a lower weather strip are provided at an upper end portion and a lower end portion of a watertight panel.

[0040] Fig.10 yes Fig. 9 Detail of the upper side.

[0041] Fig.11 is a view schematically showing another exemplary embodiment of a watertight panel.

[0042] It will be appreciated that the accompanying drawings are not necessarily drawn to scale, and that they present somewhat simplified representations of various features illustrating the basic principles of the present disclosure. The specific design features of the present disclosure as included herein (including, for example, specific dimensions, orientations, locations, and shapes) will be determined in part by the specific intended application and use environment.

[0043] In the drawings, reference numbers refer to the same or equivalent parts of the present disclosure throughout the several figures of the drawing. DETAILED DESCRIPTION

[0044] Reference will now be made in detail to various embodiments of the present disclosure, examples of which are shown in the accompanying drawings and described below. Although the present disclosure will be described in conjunction with exemplary embodiments of the present disclosure, it should be understood that this specification is not intended to limit the present disclosure to those exemplary embodiments of the present disclosure. On the other hand, the present disclosure is intended to cover not only the exemplary embodiments of the present disclosure, but also various replacements, modifications, equivalents and other embodiments that may be included in the spirit and scope of the present disclosure as defined by the appended claims.

[0045] Hereinafter, various exemplary embodiments included in the present disclosure will be described in detail with reference to the accompanying drawings. Regardless of which reference numerals, the same or similar constituent elements are assigned the same reference numerals, and repeated descriptions thereof will be omitted.

[0046] In the following description, suffixes “module,” “unit,” “part,” and “part” used to describe constituent elements are used together or interchangeably to facilitate description, but the suffixes themselves do not have distinguishable meanings or functions.

[0047] In the description of the exemplary embodiments included in this specification, when it is determined that the specific description of the well-known related technology may make the subject matter of the exemplary embodiments included in this specification unclear, the specific description will be omitted. In addition, it should be understood that the drawings are provided only to allow those skilled in the art to easily understand the exemplary embodiments included in this specification, and the technical spirit included in this specification is not limited by the drawings, and includes all changes, equivalents and substitutes included in the spirit and technical scope of the present disclosure.

[0048] Terms including ordinal numbers such as "first", "second", etc. may be used to describe various constituent elements, but the constituent elements are not limited by the terms. These terms are only used to distinguish one constituent element from another constituent element.

[0049] When a component is described as being "coupled" or "connected" to another component, it should be understood that the component may be directly coupled or connected to another component, and there may be intervening components between these components. When a component is described as being "directly coupled to" or "directly connected to" another component, it should be understood that there are no intervening components between these components.

[0050] A singular expression includes a plural expression unless clearly described as having a different meaning in the context.

[0051] In this specification, it should be understood that the terms "comprises," "includes," "contains," "has," "has," "has" or other variations thereof are open-ended, and therefore specify the existence of features, wholes, steps, operations, elements, parts or combinations thereof, but do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, parts or combinations thereof.

[0052] See also Figures 1 to 10 , an exemplary embodiment of the electric vehicle structure of the present disclosure includes: a chassis frame 3, configured to define a first closed curve portion surrounding a battery accommodating space 1; a watertight panel 5, configured to define another closed curve portion on the inner side of the closed curve portion (the closed curve portion surrounds the battery accommodating space 1 of the chassis frame 3); an upper cover 7, connected to the upper side of the watertight panel 5 and configured to cover the upper side of the battery accommodating space 1; and a lower cover 9, connected to the lower side of the watertight panel 5 and configured to cover the lower side of the battery accommodating space 1.

[0053] That is, in the electric vehicle structure of the present disclosure, the battery accommodation space is formed in a closed curved portion defined by the chassis frame 3. Therefore, compared with the configuration in the related art in which a separate battery pack is mounted on the vehicle body, it is possible to maximize the number of battery modules to be installed while reducing the weight of the vehicle and achieving efficient space utilization, thereby effectively increasing the drivable distance of the vehicle.

[0054] Furthermore, the battery housing space 1 can be effectively sealed by the watertight panel 5 , the upper cover 7 , and the lower cover 9 , thereby reliably ensuring the watertightness of the battery housing space 1 by using a simple configuration.

[0055] In this case, the closed curved portion of the battery accommodating space 1 surrounding the chassis frame 3 can be defined by a central side member 11, which is arranged at two opposite sides of the chassis frame 3 of the vehicle and extends in the front-to-rear direction of the vehicle, and a front cross beam 13 and a rear cross beam 15, which are configured to connect the central side members 11 at the two opposite sides, extend in the lateral direction of the vehicle, and be spaced apart from each other in the front-to-rear direction of the vehicle.

[0056] The chassis frame 3 is configured such that side members 17 elongated in the front-rear direction of the vehicle are provided at two opposite sides, and a plurality of cross members are provided to elongate in the lateral direction of the vehicle body and connect the side members 17 .

[0057] The side members 17 include a front side member 19 configured to define the front side of the vehicle and a rear side member 21 configured to define the rear side of the vehicle. The front side member 19 and the rear side member 21 are connected to the front and rear sides of the center side member 11, which connects the front side member 19 and the rear side member 21.

[0058] The front cross member 13 is provided to connect the front sides of the center side members 11 , and the rear cross member 15 is provided to connect the rear sides of the center side members 11 .

[0059] That is, in the exemplary embodiment of the present disclosure, the closed curved portion (which defines the battery accommodation space 1 surrounded by the chassis frame 3) is defined by the central side member 11, the front cross member 13, and the rear cross member 15. The battery accommodation space 1 can accommodate as many battery modules as possible, but does not occupy the upper and lower spaces of the chassis frame 3 at ordinary times, ultimately maximizing the space utilization of the vehicle and reducing the weight of the vehicle.

[0060] The watertight panel 5 is formed such that the inclined wall 23 extending along the inner surface of the center side member 11 , the inner surface of the front cross member 13 , and the inner surface of the rear cross member 15 defines a second closed curved portion.

[0061] The inclined wall 23 of the watertight panel 5 is formed to be inclined downward from the upper side of the battery accommodating space toward the inside of the battery accommodating space.

[0062] That is, the watertight panel 5 may be integrally formed through a deep drawing process, so that the inclined wall 23 may be formed into a shape defining a single closed curved portion.

[0063] The central side member 11, the front cross beam 13, and the rear cross beam 15 are mainly configured to provide structural rigidity of the vehicle. The central side member 11, the front cross beam 13, and the rear cross beam 15 are mainly configured by a pressed product made of a steel material and are coupled to each other by welding or the like. It is difficult to ensure shape consistency and predetermined flatness of the coupling portion between the central side member 11, the front cross beam 13, and the rear cross beam 15. For this reason, when the central side member 11, the front cross beam 13, and the rear cross beam 15 are coupled together with the upper cover 7 and the lower cover 9, it is difficult to provide complete watertightness to the battery accommodation space.

[0064] According to an exemplary embodiment of the present disclosure, in the above case, the continuous surface of the inclined wall 23 of the watertight panel 5 surrounds the inner side of the closed curved portion defined by the central side member 11, the front cross beam 13 and the rear cross beam 15 as described above, which makes it easy to ensure the complete watertightness of the battery accommodating space 1.

[0065] By using the arrangement of the watertight panel 5 , even when the chassis frame 3 is twisted, the watertightness of the battery housing space 1 can be more reliably maintained.

[0066] Meanwhile, the flange portion 25 may be provided on at least one of the upper end portion and the lower end portion of the inclined wall 23 of the watertight panel 5 and smoothly extend in the horizontal direction thereof.

[0067] The flange portion 25 may significantly improve coupling characteristics between the upper cover 7 and the watertight panel 5 or between the lower cover 9 and the watertight panel 5 , thereby more easily and completely ensuring watertightness.

[0068] For reference, Figure 7 and Figure 8 An example is shown in which the flange portion 25 is provided on both the upper end portion and the lower end portion of the inclined wall 23, and Fig. 9 and Fig.10 An example is shown in which the flange portion 25 is provided only on the lower end portion of the inclined wall 23 .

[0069] At least one of the center side member 11, the front cross member 13, and the rear cross member 15 may include an inner wall 27 provided in the form of a vertical wall surface directed toward the watertight panel 5. The mounting protrusion 29 may be provided on the inner wall 27 provided in the form of a vertical wall surface, and partially protrude to be in surface contact with the inclined wall 23 of the watertight panel 5.

[0070] The watertight panel 5 needs to be coupled to the center side member 11, the front cross member 13, and the rear cross member 15. For this purpose, the mounting protrusion 29 is provided, and the surface contact portion between the mounting protrusion 29 and the watertight panel 5 is coupled by welding or the like.

[0071] like Figures 5 to 8 As shown, in an exemplary embodiment of the present disclosure, a mounting protrusion 29 is partially provided on the inner wall 27 of the center side member 11, and the inclined wall 23 of the watertight panel 5 in surface contact with the mounting protrusion 29 is coupled to the mounting protrusion 29 by welding or the like.

[0072] In addition, a plurality of internal members 31 may be provided in the watertight panel 5 and cross the inside of the battery housing space 1 , and the mounting protrusion 29 may be formed to face the end portions of the internal members 31 .

[0073] Figure 5 A state is shown in which the watertight panel 5 is excluded and the end of the inner member 31 is aligned to face the mounting protrusion 29 of the center side member 11 .

[0074] As described above, when the internal components 31 provided in the watertight panel 5 are arranged to face each other and the watertight panel 5 is placed between these internal components 31, the mounting protrusion 29 and the internal components 31 define a safe load path for resisting impact forces etc. input from the side of the vehicle through the central side member 11, thereby suppressing deformation of the battery accommodating space and more safely protecting the battery module.

[0075] Of course, the inner member 31 may be coupled to the inner side of the watertight panel 5 by separate welding or the like.

[0076] Meanwhile, the inner wall 27 of the central side member 11 may be formed to have the same inclination as the inclined wall 23 of the watertight panel 5. In this case, adverse effects such as the occurrence of undercuts or deterioration of workability may occur during the stamping process of forming the inner member 33 including the inner wall 27 of the central side member 11.

[0077] That is, in the case where a portion of the inner wall 27 has a horizontal cavity, a press mold for forming the inner member 33 (wherein the inner wall 27 of the central side member 11 is formed parallel to the inclined wall 23 of the watertight panel 5) causes an undercut to be generated on the lower wing 35 of the two wings 35 connected to the upper and lower parts of the inner wall 27. For this reason, in the case where the portion of the inner wall 27 has the inclined cavity, the defect rate may increase during the stamping process due to the difference in length between the two wings 35.

[0078] That is, in the exemplary embodiment of the present disclosure described above, the inner wall 27 of the center side member 11 is provided in the form of a vertical wall, and the mounting protrusion 29 partially protrudes. Therefore, it is possible to ensure excellent coupling characteristics with the watertight panel 5 while suppressing the above-mentioned adverse effects occurring during the stamping process.

[0079] Furthermore, with the above-described configuration, the welding gas generated during the welding of the watertight panel 5 and the mounting protrusion 29 can be easily discharged through the gap between the watertight panel 5 and the mounting protrusion 29, and the coating liquid can easily penetrate into the space between the central side member 11 and the watertight panel 5, making coating easier and more reliable, thereby improving the rust prevention performance of the chassis frame 3 and the watertight panel 5.

[0080] Furthermore, in the case where the inner wall 27 of the center side member 11 is formed to be inclined at the same angle as the inclined wall 23 of the watertight panel 5, it is necessary to perform management for maintaining a flat surface over a relatively wide surface. For this reason, manufacturability may be deteriorated compared to the case where the mounting protrusion 29 is locally provided to be in surface contact with the watertight panel 5. As described above, in the exemplary embodiment of the present disclosure, the mounting protrusion 29 may be formed only locally on the center side member 11, thereby improving manufacturability of the vehicle.

[0081] Meanwhile, an upper sealing strip 37 may be provided at an upper end portion of the watertight panel 5 and compressed against the upper cover 7 to improve watertightness.

[0082] Furthermore, a lower sealing strip 39 may be provided at a lower end portion of the watertight panel 5 and compressed against the lower cover 9 to improve watertightness.

[0083] Fig. 9 and Fig.10 An example in which an upper sealing strip 37 and a lower sealing strip 39 are provided is shown.

[0084] The upper sealing strip 37 and the lower sealing strip 39 may each be formed in an annular shape as a whole and have a cross-sectional shape that can be press-fitted into the upper end portion or the lower end portion of the watertight panel 5. The upper sealing strip 37 and the lower sealing strip 39 may each have a surface made of a material that can ensure watertightness, such as rubber.

[0085] The present disclosure can also be expressed as follows.

[0086] That is, an exemplary embodiment of the electric vehicle structure disclosed in the present invention includes: a side member 17, configured to define two opposite sides of a chassis frame 3; a plurality of cross beams, configured to connect the side members 17 at the two opposite sides; a watertight panel 5, inserted into a closed curved portion defined by the side members 17 and the cross beams, the watertight panel 5 being configured to define a closed curved surface having watertightness and a predetermined width in the up and down directions; and an upper cover 7, arranged to surround the upper side of a battery accommodating space 1, which is surrounded by a closed curved surface defined by the watertight panel 5.

[0087] The closed curved portion of the chassis frame 3 may be defined by a central side member 11 positioned between the front side member 19 and the rear side member 21 of the side member 17, a front cross member 13 connecting two opposite ends of the front side of the central side member 11, and a rear cross member 15 connecting two opposite ends of the rear side of the central side member 11.

[0088] The closed curved surface of the watertight panel 5 having a predetermined width in the up-down direction may be defined by an inclined wall 23 inclined downward from the upper side of the battery accommodating space 1 toward the inside of the battery accommodating space 1 .

[0089] The flange portion 25 may be provided at an upper end portion of the inclined wall 23 of the watertight panel 5 and smoothly extend in a horizontal direction thereof.

[0090] An upper sealing strip 37 may be provided at an upper end portion of the inclined wall 23 of the watertight panel 5 and compressed against the upper cover 7 to improve watertightness.

[0091] The upper sealing strip 37 may be disposed to be compressed against the inner side of the bent portion 41 of the upper cover 7 .

[0092] Fig. 9 and Fig.10 The upper sealing strip 37 shown in FIG. 4 can be compressed against the inner side of the bent portion 41 of the upper cover 7 , thereby further improving the water tightness.

[0093] like Fig. 9 As shown, the lower cover 9 can be set at the lower side of the watertight panel 5 and surround the lower side of the battery accommodating space 1, and the lower sealing strip 39 can be set at the flange portion 25 at the lower end of the inclined wall 23 of the watertight panel 5 and compressed against the lower cover 9 to improve watertightness.

[0094] like Figure 7 or Figure 8 As shown, the cooling panel 43 may be disposed on the lower side of the inclined wall 23 of the watertight panel 5 and surround the lower side of the battery accommodating space 1 , and the lower cover 9 may be disposed on the lower side of the cooling panel 43 and surround the lower side of the cooling panel 43 .

[0095] A flow path is formed in the cooling panel 43 , and a refrigerant flows through the flow path, so that the battery module accommodated in the battery accommodating space 1 can be efficiently cooled.

[0096] At the same time, if Fig.11 As shown, the bottom 45 may be integrally formed with the watertight panel 5 and extend from the lower end of the inclined wall 23 to seal the lower side of the battery receiving space 1 .

[0097] At least one of the center side member 11 , the front cross member 13 , and the rear cross member 15 facing the inclined wall 23 of the watertight panel 5 may include a mounting protrusion 29 protruding to be partially in surface contact with the inclined wall 23 .

[0098] A plurality of internal members 31 may be provided in the watertight panel 5 and include ends supported on the inclined wall 23 of the watertight panel 5 , and the mounting protrusions 29 may be formed at positions facing the ends of the internal members 31 .

[0099] In an exemplary embodiment of the present disclosure, a vehicle may be referred to as being based on a concept including various vehicles. In some cases, a vehicle may be interpreted as being based on not only various land vehicles (such as cars, motorcycles, trucks, and buses) traveling on roads but also various vehicles such as airplanes, drones, ships, etc.

[0100] For ease of explanation and accurate definition of the appended claims, the terms "upper", "lower", "inner", "outer", "above", "below", "upwardly", "downwardly", "front", "back", "rear", "inside", "outside", "inwardly", "outwardly", "inner", "external", "inner", "outer", "forward", and "rearward" are used to describe features of the exemplary embodiments with reference to the locations of such features shown in the drawings. It should be further understood that the term "connected" or its derivatives refer to both direct and indirect connections.

[0101] The term "and / or" may include any combination of the multiple related listed items or the multiple related listed items. For example, "A and / or B" includes all three cases, such as "A", "B" and "A and B".

[0102] In this specification, unless otherwise stated, a singular expression includes a plural expression unless the context clearly indicates otherwise.

[0103] In an exemplary embodiment of the present invention, “at least one of A and B” may mean “at least one of A or B” or “at least one of a combination of at least one of A and B”. Furthermore, “one or more of A and B” may mean “one or more of A or B” or “one or more of a combination of one or more of A and B”.

[0104] In the exemplary embodiments of the present disclosure, it should be understood that terms such as “including” or “having” are intended to specify the presence of features, quantities, steps, operations, elements, parts, or a combination thereof described in the specification, and do not exclude the possibility of adding or existing one or more other features, quantities, steps, operations, elements, parts, or a combination thereof.

[0105] According to the exemplary embodiment of the present disclosure, components may be combined with each other to be implemented as one component, or some components may be omitted.

[0106] The foregoing descriptions of specific exemplary embodiments of the present disclosure have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise form disclosed, and it is apparent that many modifications and variations are possible in light of the above teachings. Exemplary embodiments are selected and described to explain the intended principles of the present invention and its practical application, thereby enabling other persons skilled in the art to make and utilize various exemplary embodiments of the present disclosure and various substitutions and modifications thereof. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle structure comprising: a chassis frame having a first closed curved portion surrounding the battery receiving space; a watertight panel having a second closed curved portion surrounding an inner side of the first closed curved portion, the first closed curved portion surrounding the battery receiving space of the chassis frame; an upper cover coupled to an upper side of the watertight panel and covering an upper side of the battery accommodation space; as well as A lower cover is coupled to a lower side of the watertight panel and covers a lower side of the battery accommodating space.

2. The vehicle structure according to claim 1, wherein: The first closed curved portion of the battery accommodating space surrounding the chassis frame is defined by a central side member disposed at opposite first and second sides of the chassis frame of the vehicle and extending in the front-rear direction of the vehicle, and by front and rear cross beams connecting the central side members at the opposite first and second sides, extending in the lateral direction of the vehicle, and spaced apart from each other in the front-rear direction of the vehicle.

3. The vehicle structure according to claim 2, wherein: The watertight panel includes an inclined wall extending along an inner surface of the central side member, an inner surface of the front cross member, and an inner surface of the rear cross member, the inclined wall defining the second closed bend and being seamless.

4. The vehicle structure according to claim 3, wherein: The inclined wall of the watertight panel is inclined downward from an upper side of the battery accommodating space toward an inside of the battery accommodating space.

5. The vehicle structure according to claim 4, wherein: A flange portion is provided on at least one of an upper end portion and a lower end portion of the inclined wall of the watertight panel, and the flange portion extends seamlessly in a horizontal direction of the vehicle.

6. The vehicle structure according to claim 4, wherein: At least one of the center side member, the front cross member, and the rear cross member includes an inner wall, the inner wall is provided in the form of a vertical wall surface directed toward the watertight panel, and a mounting protrusion is provided on the inner wall provided in the form of the vertical wall surface, and the mounting protrusion partially protrudes to be in surface contact with the inclined wall of the watertight panel.

7. The vehicle structure according to claim 6, wherein: A plurality of internal members are provided in the watertight panel and cross the interior of the battery accommodating space, and the mounting protrusion is formed to face ends of the internal members.

8. The vehicle structure according to claim 4, wherein: An upper sealing strip is installed at an upper end portion of the watertight panel and is compressed against the upper cover to improve watertightness.

9. The vehicle structure according to claim 4, wherein: A lower sealing strip is installed at a lower end portion of the watertight panel and is compressed against the lower cover to improve watertightness.

10. A vehicle structure comprising: a side member defining opposing first and second sides of the chassis frame; a plurality of cross beams connecting the side members at the first and second opposing sides; a watertight panel inserted into the closed curved portion defined by the side member and the cross beam, the watertight panel being configured to define a closed curved surface having watertightness and a predetermined width in the up-down direction; as well as An upper cover is arranged to surround an upper side of a battery receiving space, wherein the battery receiving space is surrounded by the closed curved surface defined by the watertight panel.

11. The vehicle structure according to claim 10, wherein: The closed curved portion of the chassis frame is defined by a central side member positioned between the front side member and the rear side member of the side members, a front cross member connecting first and second opposite ends of the front side of the central side member, and a rear cross member connecting first and second opposite ends of the rear side of the central side member.

12. The vehicle structure according to claim 11, wherein: The closed curved surface having a predetermined width in the up-down direction of the watertight panel is defined by an inclined wall inclined downward from an upper side of the battery accommodating space toward an inside of the battery accommodating space.

13. The vehicle structure according to claim 12, wherein: A flange portion is provided at an upper end portion of the inclined wall of the watertight panel, and the flange portion extends in a horizontal direction of the vehicle.

14. The vehicle structure according to claim 12, wherein: An upper sealing strip is installed at an upper end portion of the inclined wall of the watertight panel and is compressed against the upper cover to improve watertightness.

15. The vehicle structure of claim 14, wherein: The upper weather strip is installed to be compressed against an inner side of a bent portion of the upper cover.

16. The vehicle structure according to claim 12, in, A lower cover is provided at a lower side of the watertight panel and surrounds a lower side of the battery accommodation space, and Wherein, a lower sealing strip is installed at a lower end portion of the inclined wall of the watertight panel and is compressed against the lower cover to improve watertightness.

17. The vehicle structure according to claim 12, in, A cooling panel is installed at a lower side of the inclined wall of the watertight panel and surrounds a lower side of the battery accommodation space, and The lower cover is arranged at the lower side of the cooling panel and surrounds the lower side of the cooling panel.

18. The vehicle structure of claim 12, wherein: The bottom portion is integrated with the watertight panel and extends from a lower end portion of the inclined wall to seal a lower side of the battery receiving space.

19. The vehicle structure of claim 12, wherein: At least one of the center side member, the front cross member, and the rear cross member facing the inclined wall of the watertight panel includes a mounting protrusion that protrudes to be partially in surface contact with the inclined wall.

20. The vehicle structure of claim 19, wherein: A plurality of internal members are provided in the watertight panel and have ends supported on the inclined wall of the watertight panel, and the mounting protrusions are formed at positions facing the ends of the internal members.

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