KR102506239B1 - Body structure for electric vehicle - Google Patents

Abstract

A body structure for an electric vehicle is disclosed. A vehicle body structure for an electric vehicle according to an exemplary embodiment of the present disclosure includes: i) an underbody including a front back beam assembly, a front chassis frame, a center chassis frame, a rear chassis frame, and a rear back beam assembly connected to each other along the front and rear directions of the vehicle body; It may include a body and ii) an upper body mounted on the under body.

Description

Body structure for electric vehicles {BODY STRUCTURE FOR ELECTRIC VEHICLE}

Embodiments of the present invention relate to a body structure of a vehicle, and more particularly, to a body structure for a micro electric vehicle based on various purposes.

In general, an electric vehicle is a vehicle that can use electric energy stored in a battery as a power source. Electric vehicles have the advantages of no exhaust, low noise, and light weight.

Furthermore, recently, the automobile industry has introduced a new concept of future mobility vision for realizing a human-centered, dynamic future city. One of these future mobility solutions is a Purpose Built Vehicle (PBV) vehicle as purpose-based mobility.

The PBV vehicle is a vehicle that provides customized services necessary for passengers during the journey from the ground to the destination. It is an eco-friendly mobility solution vehicle that can set the optimal route for each situation and platooning using electric vehicle-based artificial intelligence.

Electric vehicles such as PBV vehicles must be manufactured with a compact box-type design in order to realize mobility based on various purposes. It is currently busy with development.

Furthermore, the electric vehicle as described above needs to apply the body structure of passenger cars, vans, and cargo vehicles according to the purpose of use, but in the body assembly line, it is inevitable to separately assemble the bodies that meet the purpose of the vehicle. Accordingly, in the related art, equipment investment costs and production costs are increased according to assembling vehicle bodies based on various purposes.

Matters described in this background art section are prepared to enhance understanding of the background of the invention, and may include matters that are not prior art already known to those skilled in the art to which this technique belongs.

Embodiments of the present invention are intended to provide a body structure for an electric vehicle that uses a common platform that can meet various purposes of a vehicle and secures a wide interior space and cargo loading space.

A vehicle body structure for an electric vehicle according to an embodiment of the present invention includes: i) an underbody including a front back beam assembly, a front chassis frame, a center chassis frame, a rear chassis frame, and a rear back beam assembly connected to each other along the front and rear directions of the vehicle body; ii) An upper body mounted on the under body may be included.

In addition, in the vehicle body structure for an electric vehicle according to an embodiment of the present invention, the under body includes a center follower assembly mounted on the center chassis frame, a rear follower assembly mounted on the rear chassis frame, and the rear chassis frame. A variable length member connected to the rear end of the rear beam assembly and the rear back beam assembly along the front and rear directions of the vehicle body may be included.

In addition, in the vehicle body structure for an electric vehicle according to an embodiment of the present invention, the center follower assembly may form a center cabin through the upper body.

In addition, in the body structure for an electric vehicle according to an embodiment of the present invention, the rear floor assembly may form a rear cabin through the upper body.

Also, in the vehicle body structure for an electric vehicle according to an embodiment of the present invention, the upper body may include a space frame coupled to the center chassis frame and the rear floor assembly.

In addition, in the vehicle body structure for an electric vehicle according to an embodiment of the present invention, the rear floor assembly and the variable length member may form a luggage portion through the upper body.

In addition, in the vehicle body structure for an electric vehicle according to an embodiment of the present invention, the upper body includes a space frame coupled to the center chassis frame, and a luggage frame coupled to the rear floor assembly and the variable length member. can do.

In addition, in the vehicle body structure for an electric vehicle according to an embodiment of the present invention, the luggage frame is connected in the front and rear directions, the vehicle width direction, and the vertical direction of the vehicle body, and is coupled to the rear follower assembly and the length variable member. It may contain luggage members.

In the vehicle body structure for an electric vehicle according to an embodiment of the present invention, the rear back beam assembly may include a rear back beam and a rear crash box connected to both sides of the rear back beam.

In addition, in the vehicle body structure for an electric vehicle according to an embodiment of the present invention, the variable length member has a closed cross section of a rectangular cross section, and is coupled to the front end of the rear crash box and both rear ends of the rear chassis frame. It can be.

Also, in the vehicle body structure for an electric vehicle according to an embodiment of the present invention, the center chassis frame and the space frame may be coupled through a first mounting part.

In addition, in the vehicle body structure for an electric vehicle according to an embodiment of the present invention, the first mounting part has a stepped surface and is coupled to the outer surface of the center chassis frame along the front and rear directions of the vehicle body; side sills; A plurality of bulkheads coupled to the surface and the outer surface of the center chassis frame and spaced apart along the front-rear direction of the vehicle body, with the lower side of the space frame on the stepped surface and coupled to the outer surface of the side sill It may include a plurality of first joints.

In addition, in the body structure for an electric vehicle according to an embodiment of the present invention, the rear floor assembly and the space frame may be coupled through a second mounting part.

In addition, in the vehicle body structure for an electric vehicle according to an embodiment of the present invention, the second mounting part may include U-shaped second joints coupled to the rear follower assembly with the lower rear of the space frame on the inside. there is.

In addition, in the vehicle body structure for an electric vehicle according to an embodiment of the present invention, the rear follower assembly includes a pair of first floor support members coupled to each side of the rear chassis frame at an opposite inclination along the front-rear direction of the vehicle body; , a second floor support member coupled to upper ends of the first floor support members along the front-back direction of the vehicle body, a plurality of third floor support members connected to the second floor support member in the vehicle width direction, and the second floor A support member and a rear floor panel module coupled to the third floor support members may be included.

Embodiments of the present invention use the underbody as a common platform, and by adjusting the overall length of the underbody through a variable length member, it is possible to secure a wide interior space and cargo loading space that meets the purpose of the vehicle, and assemble the vehicle body. It can reduce equipment investment and production cost.

In addition, effects that can be obtained or predicted due to the embodiments of the present invention will be directly or implicitly disclosed in the detailed description of the embodiments of the present invention. That is, various effects expected according to an embodiment of the present invention will be disclosed within the detailed description to be described later.

Since these drawings are for reference in explaining exemplary embodiments of the present invention, the technical idea of the present invention should not be construed as being limited to the accompanying drawings.
1 is a diagram illustrating an example of an electric vehicle to which a body structure according to an embodiment of the present invention may be applied.
2 and 3 are diagrams illustrating a vehicle body structure for an electric vehicle according to an embodiment of the present invention.
4 is a view illustrating a rear follower assembly of an under body applied to a body structure for an electric vehicle according to an embodiment of the present invention.
5 is a diagram illustrating a coupling structure of an under body and an upper body applied to a body structure for an electric vehicle according to an embodiment of the present invention.
6 is a diagram illustrating another example of an electric vehicle to which a body structure for an electric vehicle according to another embodiment of the present invention can be applied.
7 and 8 are diagrams illustrating a vehicle body structure for an electric vehicle according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

Since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to what is shown in the drawings, and the thickness is enlarged to clearly express various parts and regions.

And, in the following detailed description, the names of the components are divided into first, second, etc. to classify them based on the relationship in which the components are the same, and the order is not necessarily limited in the following description.

Throughout the specification, when a part includes a certain component, this means that it may further include other components without excluding other components unless otherwise stated.

In addition, terms such as ... unit, ... unit, ... unit described in the specification mean a comprehensive unit of configuration that performs at least one function or operation.

1 is a diagram illustrating an example of an electric vehicle to which a body structure according to an embodiment of the present invention may be applied.

Referring to FIG. 1 , a vehicle body structure 100 according to an embodiment of the present invention is applied to a subminiature electric vehicle 1A such as a Purpose Built Vehicle (hereinafter referred to as PBV) type vehicle. can be applied

Here, the PBV-type electric vehicle 1A is an eco-friendly mobile vehicle based on an electric vehicle that provides customized services necessary for passengers while moving from the ground to a destination.

Furthermore, the PBV type electric vehicle 1A may be a box-shaped design vehicle having a wide interior space. In the box-shaped electric vehicle 1A described above, a windshield glass (not shown) is formed at the front of the vehicle body.

Furthermore, the PBV type electric vehicle (1A) forms a center cabin portion (3) on the center side, forms a rear cabin portion (5) on the rear side, and is a box design type passenger vehicle having a wide interior space. can include

In the art, the vehicle width direction is referred to as the L direction, the vehicle body length direction (the front and rear direction of the vehicle body) as the T direction, and the vehicle body height direction as the H direction. However, in the embodiment of the present invention, instead of setting the LTH direction as described above as the reference direction, the vehicle width direction, the front-rear direction of the vehicle body, and the vertical direction will be set, and the following components will be described.

In addition, the end (one/one end or the other end/one end) in the following may be defined as either end, and is defined as a certain portion (one/one end or the other end/one end) including the end. It could be.

The body structure 100 for an electric vehicle according to an embodiment of the present invention applied to the electric vehicle 1A as described above is composed of a structure having a common platform that can meet the purpose of the vehicle.

2 and 3 are diagrams illustrating a vehicle body structure for an electric vehicle according to an embodiment of the present invention.

1 to 3, the body structure 100 for an electric vehicle according to an embodiment of the present invention is basically an underbody capable of configuring an electric vehicle 1A of a passenger vehicle having a wide interior space ( 10) and the upper body 60, which will be described by configuration as follows.

In an embodiment of the present invention, the under body 10 is a lower frame of the entire vehicle body structure 100 and is provided in a skateboard type (also referred to as a rolling chassis type in the art).

The under body 10 includes a front back beam assembly 11, a front chassis frame 21, a center chassis frame 25, a rear chassis frame 31, and a rear back beam assembly 51 connected to each other along the front and rear directions of the vehicle body. contains

The front back beam assembly 11 is provided at the frontmost side of the under body 10, and the front chassis frame 21 is connected to the rear side of the front back beam assembly 11.

The center chassis frame 25 is connected to the rear side of the front chassis frame 21, and the rear chassis frame 31 is connected to the rear side of the center chassis frame 25.

The rear back beam assembly 51 is connected to the rear side of the rear chassis frame 31 at the rearmost side of the under body 10 .

In the above, the front back beam assembly 11 includes a front back beam 13 and a front crash box 15 connected to the rear side of the front back beam 13. Here, the front crash box 15 has a closed cross section of a square cross section shape, and connects the front back beam 13 and the front chassis frame 21.

A dash panel assembly 23 may be mounted on the front chassis frame 21, and a driving motor (not shown) may be installed. The center chassis frame 25 may form the above-mentioned center cabin part 3, and the rear chassis frame 31 may form the above-mentioned rear cabin part 5. Here, the battery assembly 9 is mounted (mounted) on the center chassis frame 25 through a cross member or the like.

And, the rear back beam assembly 51 includes a rear back beam 53 and a rear crash box 55 connected to the front side of the rear back beam 53. In the above, the rear crash box 55 has a closed cross section of a rectangular cross section shape, and connects the rear back beam 53 and the rear chassis frame 31.

Meanwhile, in the body structure 100 for an electric vehicle according to the embodiment of the present invention as described above, the under body 10 further includes a center follower assembly 27 and a rear follower assembly 33.

In the embodiment of the present invention, the center follower assembly 27 is mounted on the center chassis frame 25 and is connected to the dash panel assembly 23 through the front chassis frame 21. The center follower assembly 27 may form the center cabin portion 3 through the upper body 60, which will be described later.

The center follower assembly 27 includes a center follower panel 28 coupled to the center chassis frame 25 through both ends along the vehicle width direction. Components such as a seat mount and a steering mount may be mounted on the center follower panel 28 .

In the embodiment of the present invention, the rear follower assembly 33 is mounted on the rear chassis frame 31 and is connected to the center follower assembly 27 through the center chassis frame 25. The rear floor assembly 33 may form the rear cabin portion 5 through the upper body 60 to be described later.

As shown in FIG. 4 , the rear floor assembly 33 includes first floor support members 35, second floor support members 37, third floor support members 39, and a rear floor panel module. (41) is included.

The first floor support members 35 are provided as a pair on each side of the rear chassis frame 31 . The first floor support members 35 are disposed on the rear chassis frame 31 in a vertical direction, and are coupled to both sides of the rear chassis frame 31 at an inclination opposite to each other along the front-rear direction of the vehicle body.

The second floor support members 37 are coupled to upper ends of the first floor support members 35 along the front and rear directions of the vehicle body. A plurality of the third floor support members 39 are connected to the second floor support member 37 in the vehicle width direction.

And, the rear floor panel module 41 is coupled to the second floor support member 37 and the third floor support member 39 .

The above rear floor panel module 41 includes a rear floor panel 43 coupled to upper surfaces of the second and third floor support members 37 and 39 and a plurality of rear floor panels 43 coupled to upper surfaces of the rear floor panel 43. Reinforcing panels 45 are included.

In the above, the reinforcing panels 45 are provided with a plate material bent in a set shape, and are disposed spaced apart from each other along the vehicle width direction on the upper surface of the rear follower panel 43, and the upper surface of the rear follower panel 43 in the front-rear direction of the vehicle body. combined according to

1 to 3, in the embodiment of the present invention, the upper body 60 is an upper frame (or cabin frame) of the entire vehicle body structure 100, and is mounted (coupled) on the under body 10. .

The upper body 60 includes a space frame 61 coupled to the center chassis frame 25 and the rear floor assembly 33 of the under body 10 . The space frame 61 may form the above-mentioned center cabin part 3 and rear cabin part 5 through the center floor assembly 27 and the rear floor assembly 33 .

The space frame 61 is provided as a frame skeleton in which, for example, pipe-type frame members are connected through welding or joints, and various panels 6 are coupled to the space frame 61 . These panels 6 may include a side panel assembly, a roof panel assembly, a fender panel assembly, a hood panel assembly, a tailgate panel assembly, and the like.

As shown in FIG. 5, the space frame 61 is coupled (mounted) to the center chassis frame 25 through the first mounting portion 71 (also referred to as a body coupling portion in the art), and is coupled to the body. It can be combined (mounted) with the rear follower assembly 33 through the second mounting portion 72 as a portion.

The first mounting part 71 includes a side seal 73, a plurality of bulk heads 75, and a plurality of first joints 77.

The side sill 73 is for coupling the lower side of the space frame 61 to both sides of the center chassis frame 25, and is provided as a panel having a cross-sectional shape with a stepped surface 74, and the center chassis frame 25 ) is coupled to the outer surface of the vehicle body along the front and rear directions.

In the above, the stepped surface 74 is formed along the front-rear direction of the vehicle body at the lower part of the side sill 73, and is provided as a surface bent from the upper side to the lower side, and the stepped surface 74 has the space frame 61 The lower side is arranged along the front-rear direction of the body.

The bulk heads 75 are for reinforcing the rigidity of the side sills 73, and are coupled to the inner surface of the side sills 73 and the outer surface of the center chassis frame 25, and the inner surface of the side sills 73 It is spaced apart from the surface and the outer surface of the center chassis frame 25 at set intervals along the front-rear direction of the vehicle body.

The first joints 77 are coupled to the outer surface of the side seal 73 with the lower side of the space frame 61 on the stepped surface 74 of the side seal 73. The first joint 77 is provided as a mounting bracket having a substantially U-shaped cross section.

The second mounting part 72 is for coupling the lower rear of the space frame 61 to the rear floor assembly 33 and includes a plurality of second joints 79 .

The second joints 79 are coupled to the rear follower panel 43 of the rear follower assembly 33 with the lower rear of the space frame 61 on the inside between them and the rear follower assembly 33 . For example, the second joints 79 are provided with mounting brackets having a U-shaped cross section.

Therefore, according to the body structure 100 for an electric vehicle according to an embodiment of the present invention configured as described above, as a purpose-based mobility (PBV) vehicle providing various customized services, the electric vehicle 1A of a box design type passenger vehicle ) can be configured.

Thus, in the embodiment of the present invention, the upper body 60 as the space frame 61 is coupled to the under body 10 having the center follower assembly 27 and the rear floor assembly 33, and the center cabin portion 3 ) and a rear cabin portion 5, it is possible to secure a wide interior space.

6 is a diagram illustrating another example of an electric vehicle to which a body structure for an electric vehicle according to another embodiment of the present invention can be applied.

Referring to FIG. 6 , a body structure 200 for an electric vehicle according to another embodiment of the present invention may be applied to a PBV type electric vehicle 1B constituting an interior space and a cargo loading space.

Such a PBV type electric vehicle 1B may include a subminiature cargo vehicle having a center cabin portion 3 formed on the center side and a luggage portion 7 formed on the rear side.

7 and 8 are diagrams illustrating a vehicle body structure for an electric vehicle according to another embodiment of the present invention. In the drawings, the same reference numerals are assigned to the same components as those of the previous embodiment.

6 to 8, a body structure 200 for an electric vehicle according to another embodiment of the present invention combines an under body 10 as a common platform with an upper body 160 as in the previous embodiment, An electric vehicle 1B of a box design type cargo vehicle can be configured.

To this end, the under body 10 according to the embodiment of the present invention has the same structure as in the previous embodiment, and further includes a variable length member 81.

In the embodiment of the present invention, the variable length member 81 forms a luggage portion 7 in an electric vehicle 1B of a truck through a rear floor assembly 33 and an upper body 160 to be described later. can That is, the rear follower assembly 33 and the variable length member 81 may form the luggage portion 7 through the upper body 160 .

The length variable members 81 have different lengths to adjust the cargo space of the luggage portion 7, and are connected to the rear end of the rear chassis frame 31 and the rear back beam assembly 51 in the under body 10. connected along the fore-and-aft direction.

The variable length member 81 has a closed cross-section of a square cross-section shape, and is coupled to the front end of the rear crash box 55 of the rear back beam assembly 51 and both rear ends of the rear chassis frame 31.

Meanwhile, in the embodiment of the present invention, the upper body 160 is coupled to the under body 10, and forms the center cabin portion 3 through the center floor assembly 27 as in the previous embodiment, and the rear The luggage portion 7 may be formed through the floor assembly 33 and the variable length member 81 .

The upper body 160 includes a space frame 161 and a luggage frame 191.

The space frame 161 is coupled to the center chassis frame 25 of the under body 10 . The space frame 161 may form the above-mentioned center cabin portion 3 through the center floor assembly 27 .

The above-described space frame 161 is provided as a frame skeleton in which pipe-type frame members are connected through welding or joints, and various panels 6 are coupled to the space frame 161 .

Furthermore, the space frame 161 may be coupled to the center chassis frame 25 through the first mounting part 71 as in the previous embodiment.

In the embodiment of the present invention, the luggage frame 191 is coupled to the rear floor assembly 33 and the variable length member 81 of the under body 10 . The luggage frame 191 may form the luggage portion 7 as described above through the rear floor assembly 33 and the variable length member 81 .

The luggage frame 191 includes a plurality of luggage members 193 connected in front and rear directions of the vehicle body, in the vehicle width direction, and in the vertical direction. The luggage members 193 are coupled to the top surface of the rear floor assembly 33 and the top surface of the variable length member 81 by bolting or welding.

Thus, according to the body structure 200 for an electric vehicle according to another embodiment of the present invention configured as described above, the front and rear rear crash box 55 in the underbody 10 as a common platform as in the previous embodiment The rear ends of both sides of the chassis frame 31 are connected through the variable length member 81, and the overall length of the under body 10 can be increased.

Therefore, in the embodiment of the present invention, the space frame 161 as the upper body 160 and the luggage frame are provided to the center chassis frame 25, the rear floor assembly 33, and the variable length member 81 of the under body 10. 191 may be combined, the center cabin portion 3 may be formed through the center floor assembly 27, and the luggage portion 7 may be formed through the rear floor assembly 33 and the variable length member 81. .

Accordingly, in an embodiment of the present invention, the electric vehicle 1B of a box design type cargo vehicle may be configured as a purpose-based mobility (PBV) vehicle providing various customized services.

As described above, the rest of the configuration and operational effects of the body structure 200 for an electric vehicle according to another embodiment of the present invention are the same as in the previous embodiment, so a detailed description thereof will be omitted.

According to the embodiments of the present invention as described so far, the under body 10 is used as a common platform, and the full length of the under body 10 can be adjusted through the length variable member 81 .

Accordingly, in the embodiments of the present invention, since electric vehicles 1A and 1B such as passenger vehicles and cargo vehicles that meet the purpose of the vehicle can be configured, equipment investment and production costs associated with assembling a vehicle body based on various purposes can be reduced. can do.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and it is possible to carry out various modifications within the scope of the claims and the detailed description of the invention and the accompanying drawings, and this is also the present invention. It goes without saying that it falls within the scope of the invention.

1A, 1B: electric vehicle 3: center cabin
5: rear cabin part 6: panel
7: luggage support 9: battery assembly
10: under body 11: front back beam assembly
13: front back beam 15: front crash box
21: front chassis frame 23: dash panel assembly
25: center chassis frame 27: center floor assembly
28: center floor panel 31: rear chassis frame
33: rear floor assembly 35: first floor support member
37: second floor support member 39: third floor support member
41: rear floor panel module 43: rear floor panel
45: reinforcement panel 51: rear back beam assembly
53: rear back beam 55: rear crash box
60, 160: upper body 61, 161: space frame
71: first mounting part 72: second mounting part
73: side seal 74: stepped surface
75: bulk head 77: first joint
79 second joint 81 full length variable member
191: luggage frame 193: luggage member
100, 200: body structure

Claims (7)

an underbody including a front back beam assembly, a front chassis frame, a center chassis frame, a rear chassis frame, and a rear back beam assembly connected to each other along the front and rear directions of the vehicle body; and
Including; an upper body mounted on the under body,
The under body includes a center follower assembly mounted on the center chassis frame, a rear follower assembly mounted on the rear chassis frame, a rear end of the rear chassis frame, and the rear back beam assembly connected along the front and rear directions of the vehicle body. including members,
The upper body includes a space frame coupled to the center chassis frame and the rear floor assembly,
The center chassis frame and the space frame are coupled through a first mounting part,
The first mounting part includes a side sill having a stepped surface and coupled to the outer surface of the center chassis frame along the vehicle body longitudinal direction, coupled to the inner surface of the side sill and the outer surface of the center chassis frame, and is coupled to the vehicle body longitudinal direction. A vehicle body structure for an electric vehicle, comprising: a plurality of bulk heads spaced apart from each other; and a plurality of first joints coupled to an outer surface of the side sill with a lower side of the space frame on the stepped surface. According to claim 1,
The center floor assembly forms a center cabin through the upper body,
The rear floor assembly is a body structure for an electric vehicle forming a rear cabin portion through the upper body. an underbody including a front back beam assembly, a front chassis frame, a center chassis frame, a rear chassis frame, and a rear back beam assembly connected to each other along the front and rear directions of the vehicle body; and
Including; an upper body mounted on the under body,
The under body includes a center follower assembly mounted on the center chassis frame, a rear follower assembly mounted on the rear chassis frame, a rear end of the rear chassis frame, and the rear back beam assembly connected along the front and rear directions of the vehicle body. including members,
The rear floor assembly and the variable length member form a luggage portion through the upper body;
The upper body includes a space frame coupled to the center chassis frame, and a luggage frame coupled to the rear floor assembly and the variable length member;
The luggage frame includes a plurality of luggage members connected in front and rear directions, a vehicle width direction, and a vertical direction of the vehicle body, and coupled to the rear floor assembly and the variable length member,
The center chassis frame and the space frame are coupled through a first mounting part,
The first mounting part includes a side sill having a stepped surface and coupled to the outer surface of the center chassis frame along the vehicle body longitudinal direction, coupled to the inner surface of the side sill and the outer surface of the center chassis frame, and is coupled to the vehicle body longitudinal direction. A vehicle body structure for an electric vehicle, comprising: a plurality of bulk heads spaced apart from each other; and a plurality of first joints coupled to an outer surface of the side sill with a lower side of the space frame on the stepped surface. According to claim 1 or 3,
The rear back beam assembly includes a rear back beam and a rear crash box connected to both sides of the rear back beam,
The electric vehicle body structure of claim 1 , wherein the variable length member has a closed cross section of a rectangular cross section shape and is coupled to a front end of the rear crash box and both rear ends of the rear chassis frame. delete According to claim 1 or 3,
The rear floor assembly and the space frame are coupled through a second mounting portion,
The second mounting part includes U-shaped second joints coupled to the rear floor assembly with the lower rear of the space frame inside. According to claim 1 or 3,
The rear floor assembly,
a pair of first floor support members coupled to each side of the rear chassis frame at an opposite inclination along the front-rear direction of the vehicle body;
second floor support members coupled to upper ends of the first floor support members along the front-back direction of the vehicle body;
a plurality of third floor support members connected to the second floor support member in a vehicle width direction;
A rear floor panel module coupled to the second floor support member and the third floor support member
A body structure for an electric vehicle comprising a.

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