TWI694938B - Electric vehicle body and chassis - Google Patents

Abstract

An electric vehicle body includes a chassis and a seat assembly. The chassis includes a frame and a battery module. The frame defines a space, and the frame can be selectively operated to change between a deployed state and a collapsed state. The battery module is disposed in the space and includes a first battery unit coupled to the frame and a second battery unit detachably assembled to the first battery unit. When the frame is deployed, the second battery unit is assembled In the first battery unit, when the frame is in the folded state, the second battery unit is detached from the first battery unit. The seat assembly includes a plurality of seats provided on the chassis. When the frame is in the unfolded state, the seats are in a spaced apart and spaced apart state. When the frame is in the collapsed state, the seats In a stacked state stacked on top of each other.

Description

Electric vehicle body and chassis

The invention relates to an electric vehicle, in particular to an electric vehicle body and a chassis which can be telescopically changed in size.

In order to reduce energy consumption and save energy, existing electric vehicles mostly use lightweight materials to build the body to reduce the weight of the body. However, the degree of weight reduction using the aforementioned method is limited, and therefore the energy saving effect cannot be greatly improved. In addition, the cabin space of the existing electric vehicle is fixed and cannot be changed, so it cannot meet the user's needs for changing the cabin space for different usage environments and conditions.

Therefore, an object of the present invention is to provide an electric vehicle body that can overcome at least one disadvantage of the prior art.

Therefore, the electric vehicle body of the present invention includes a chassis and a seat assembly. The chassis includes a frame and a battery module. The frame defines a space that can be selectively operated to change between a deployed state and a collapsed state. Battery module design Placed in the space and including a first battery unit coupled to the frame, and a second battery unit detachably assembled to the first battery unit, when the frame is in the deployed state, the second The battery unit is assembled to the first battery unit, and when the frame is in the folded state, the second battery unit is detached from the first battery unit. The seat assembly includes a plurality of seats provided on the chassis, when the frame is in the deployed state, the seats are in a separated state separated from each other, and when the frame is in the collapsed state , The seats are stacked in a stacked state.

In the electric vehicle body of the present invention, the frame includes four corner plates, and four first telescopic rods, each of the first telescopic rods is fixedly connected between two corresponding corner plates, the first telescoping Two of the rods are spaced in a front-rear direction and can be stretched in a left-right direction perpendicular to the front-rear direction. The remaining two of the first telescopic rods are spaced in the left-right direction and can be stretched in the front-rear direction to make the vehicle The rack can simultaneously expand and contract in the front-rear direction and the left-right direction to switch between the expanded state and the collapsed state.

In the electric vehicle body of the present invention, the first battery unit includes four first batteries that are detachably coupled to the corner plates respectively, and the seat assembly further includes four batteries that are respectively disposed on tops of the first batteries A bracket, and four second telescopic rods, each of the second telescopic rods is fixedly connected between corresponding two of the brackets, two of the second telescopic rods are spaced along the front-rear direction and can be along the left-right direction Retractable, the other two of the second telescopic rods are spaced apart in the left-right direction and can be retracted in the front-rear direction, and the number of the seats is four and are respectively arranged on the brackets.

In the electric vehicle body of the present invention, each of the seats has a seat plate, and a connecting plate connected to the front end of the seat plate and fixedly connected to the corresponding bracket.

In the electric vehicle body of the present invention, the brackets are a first bracket, a second bracket, a third bracket, and a fourth bracket, the first bracket and the second bracket are spaced apart in the left-right direction, The third bracket and the fourth bracket are spaced in the left-right direction, the first bracket and the third bracket are spaced in the front-rear direction, the second bracket and the fourth bracket are spaced in the front-rear direction, the first The height of a bracket in a vertical direction is higher than the height of the second bracket, the height of the second bracket in the vertical direction is higher than the height of the third bracket, and the height of the third bracket in the vertical direction is higher than the height of the fourth bracket.

In the electric vehicle body of the present invention, the second battery unit includes a plurality of detachably connected second batteries, when the frame is in the deployed state, the first batteries are separated from each other, and the second batteries Assembled between the first batteries, when the frame is in the collapsed state, the second batteries are detached from the first batteries, and the first batteries are merged with each other.

In the electric vehicle body of the present invention, the number of the second batteries is five, four of the second batteries are each assembled between two corresponding first batteries, and the remaining one is assembled in the foregoing four The middle of the second battery.

In the electric vehicle body of the present invention, the frame can simultaneously expand and contract in a front-rear direction and a left-right direction perpendicular to the front-rear direction to switch between the expanded state and the collapsed state.

Another object of the present invention is to provide a chassis of an electric vehicle body that can overcome at least one disadvantage of the prior art.

Therefore, the chassis of the electric vehicle body of the present invention includes a frame and a battery module. The frame defines a space that can be selectively operated to change between a deployed state and a collapsed state. The battery module is disposed in the space and includes a first battery unit coupled to the frame, and a second battery unit detachably assembled to the first battery unit, when the frame is in the deployed state, The second battery unit is assembled to the first battery unit. When the frame is in the folded state, the second battery unit is detached from the first battery unit.

The effect of the present invention is that: the frame can be selectively operated to switch between the expanded state and the collapsed state, and the design of the battery module and seat assembly enables the user to target different environments and conditions And operate the electric car body to change to the required mode of use. In addition, by detaching the second battery unit from the first battery module, the weight of the battery module is greatly reduced, thereby greatly reducing the overall weight of the electric vehicle body, thereby reducing the electric vehicle body Energy consumption to greatly improve the energy saving effect.

100: electric car body

10: Chassis

1: Frame

11: corner plate

111: Piercing

12: Wheel

13: The first telescopic rod

131: The first connection board

132: tube body

133: Telescopic rod body

134: Second connection plate

14: Space

2: battery module

3: The first battery unit

31: The first battery

31’: First battery

31”: the first battery

31''': the first battery

311: the first screw hole

312: Second screw hole

313: The first chute

314: second chute

32: Bolt

33: Installation space

4: Second battery unit

41: Second battery

41’: Second battery

411: First slider

412: Second slider

413: third chute

414: fourth chute

50: seat assembly

5: The first bracket

5’: Second bracket

5”: Third bracket

5''': Fourth bracket

51: The first frame

511: through hole

52: second frame

53: Bolt

6: Second telescopic rod

61: Tube

62: Telescopic rod body

7: Seat

7’: Seat

7”: Seat

7''': Seat

71: seat plate

72: connection board

73: back to board

X: front and back direction

Y: left and right direction

Z: up and down direction

Other features and functions of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: 1 is a perspective view of an embodiment of an electric vehicle body of the present invention, illustrating the electric vehicle body in a multi-person use mode, a frame in a deployed state, and a plurality of seats in a separated state; FIG. 2 Is an exploded perspective view of the embodiment, illustrating the assembly relationship between the frame, a battery module, and a seat assembly; FIG. 3 is an exploded perspective view of the battery module of the embodiment, illustrating An assembly relationship between a first battery unit and a second battery unit; FIG. 4 is an exploded perspective view of the embodiment, illustrating the assembly relationship between the battery module and the seat assembly; FIG. 5 is the An exploded perspective view of an embodiment illustrating the battery module detached from the frame; FIG. 6 is an incomplete exploded view of the embodiment illustrating the detachment of the second battery unit from the first battery unit; FIG. 7 is An incomplete three-dimensional exploded view of this embodiment illustrates that the frame changes to a collapsed state, the four first batteries of the first battery unit are in a combined state, and the seats are in a stacked state; FIG. 8 is An incomplete exploded view of this embodiment illustrates that the first battery unit is assembled to the frame; and FIG. 9 is a perspective view of this embodiment illustrating the electric vehicle body in a single-person use mode.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numbers.

Referring to FIG. 1, it is an embodiment of an electric vehicle body 100 of the present invention. The electric vehicle may be, for example, a pure battery electric vehicle that uses only battery power as the driving force, or a composite electric vehicle that uses only part of the battery power as the driving force. Car or plug-in compound electric vehicle. The electric vehicle body 100 includes a chassis 10 and a seat assembly 50. Hereinafter, the traveling direction of the electric vehicle body 100 is defined as a front-rear direction X, a left-right direction Y perpendicular to the front-rear direction X, and an up-down direction Z perpendicular to the front-rear direction X and the left-right direction Y.

1 and 2, the chassis 10 includes a frame 1 and a battery module 2. The frame 1 includes four corner plates 11, four wheels 12, and four first telescopic rods 13. The four corner plates 11 respectively define the four corners of the frame 1. Each corner plate 11 is made of a metal material. Each corner plate 11 has a rectangular shape and its long direction extends along the front-rear direction X and is formed with a plurality of through holes 111. Each wheel 12 is locked to the outer surface of the corresponding corner plate 11 by, for example, bolt locking. Each first telescopic rod 13 is fixedly connected between the corresponding two corner plates 11. The four corner plates 11 and the four first telescopic rods 13 define a space 14 together. Two of the first telescopic rods 13 are spaced apart in the front-rear direction X and can be stretched in the left-right direction Y, and the remaining two first telescopic rods 13 are spaced apart in the left-right direction Y and can be stretched in the front-rear direction X. In this embodiment, each first telescopic rod 13 is a hydraulic telescopic rod and has a first connection A plate 131, a tube body 132 provided on the first connecting plate 131, a telescopic rod body 133 telescopically extending through the tube body 132, and a second connecting plate 134 provided on the end of the telescopic rod body 133. The first connection plate 131 and the second connection plate 134 are fixedly connected to the corresponding corner plate 11 by, for example, welding. The supply of hydraulic oil into the pipe body 132 drives the telescopic rod body 133 to move, so that the telescopic rod body 133 can telescope relative to the tube body 132. Thereby, the frame 1 can be selectively operated while simultaneously expanding and contracting in the front-rear direction X and the left-right direction Y, between a deployed state shown in FIG. 1 and a folded state shown in FIG. 7 Transform.

It should be noted that the first connecting plate 131 and the second connecting plate 134 can also be locked to the corresponding corner plate 11 by bolts, for example, not limited to the fixing method disclosed in this embodiment.

2 and 3, the battery module 2 is disposed in the space 14 (as shown in FIG. 1) and includes a first battery unit 3 coupled to the frame 1, and a detachably assembled first battery unit 3的second battery unit 4 The first battery unit 3 includes four first batteries 31, 31', 31", 31"' detachably coupled to the four corner plates 11, respectively. The first batteries 31, 31', 31", 31" A plurality of first screw holes 311 on the outside and a plurality of second screw holes 312 on the top are formed in each. Each bolt 32 is inserted into the corresponding through hole 111 of the corresponding corner plate 11 and screwed into the corresponding first screw hole 311 corresponding to the first battery 31, 31', 31", 31'", so that the corresponding corner plate 11 Locked to the outer side of the corresponding first battery 31, 31', 31", 31"'. The first batteries 31, 31', 31", 31"' also each form a first sliding slot 313, and a second sliding slot 314. The first sliding slot 313 is elongated And its long direction extends along the front-rear direction X. The second chute 314 has an elongated shape and its length extends in the left-right direction Y. Among them, the first chute 313 of the two first batteries 31, 31' are opposed to each other and spaced left and right, and the first chute 313 of the two first batteries 31", 31"' are opposed to each other and spaced left and right. The second slide grooves 314 of one battery 31, 31" face each other and are spaced back and forth, and the second slide grooves 314 of two first batteries 31', 31"" face each other and spaced back and forth. The four first batteries 31, 31', 31", 31"' can be changed between a separated state as shown in Fig. 1 and a merged state as shown in Fig. 7. When the frame 1 is in the expanded state At this time, the four first batteries 31, 31', 31", 31"' are separated from each other and jointly define an installation space 33 for the assembly of the second battery unit 4, and the second battery unit 4 is assembled in the installation space Within 33. When the frame 1 is in the collapsed state, the second battery unit 4 is detached from the first batteries 31, 31', 31", 31"', and the first batteries 31, 31', 31", 31 '''Merge with each other.

The second battery unit 4 includes five second batteries 41, 41' detachably connected to each other. Four of the second batteries 41 are assembled between the corresponding two first batteries 31, 31', 31", 31"', and the remaining one of the second batteries 41' is assembled of the four second batteries 41 In the middle, each second battery 41 has two first sliders 411 spaced left and right, and two second sliders 412 spaced back and forth. Each first slider 411 is elongated and its length is along the front-back direction X Each second slider 412 is elongated and its length extends along the left-right direction Y. The two first sliders 411 of the front second battery 41 are detachably slidably connected to the first of the two first batteries 31, 31' In a sliding slot 313, the rear end of the second battery 41 The two first sliders 411 are detachably slidably connected to the first sliding grooves 313 of the two first batteries 31", 31"'. The two second sliders 412 of the left second battery 41 are detachably slidably connected In the second sliding slots 314 of the two first batteries 31, 31", the two second sliders 412 of the right second battery 41 are detachably slidably connected to the second of the two first batteries 31', 31'" Inside the chute 314. The second battery 41' is formed with two third chutes 413 spaced left and right, and two fourth chutes 414 spaced front and back. Each third chute 413 has an elongated shape and its longitudinal direction extends in the front-rear direction X. Each fourth chute 414 has an elongated shape and its longitudinal direction extends in the left-right direction Y. The two third sliding grooves 413 are for detachably sliding the first slider 411 of the left and right second batteries 41 respectively, and the two fourth sliding grooves 414 are respectively for the second slider 412 of the front and rear second batteries 41 Removably sliding.

2 and 4, the seat assembly 50 includes four brackets, four second telescopic rods 6, and four seats 7, 7', 7", 7'". The four brackets are respectively a first A bracket 5, a second bracket 5', a third bracket 5", and a fourth bracket 5"'. The first bracket 5, the second bracket 5', the third bracket 5" and the fourth bracket 5"' are respectively disposed on the top surfaces of the four first batteries 31, 31', 31", 31'", the first bracket 5. The second bracket 5', the third bracket 5" and the fourth bracket 5'" each have a first frame body 51 and a second frame body 52. The first frame body 51 is formed with a plurality of through holes 511 The through holes 511 communicate with the corresponding second screw holes 312 of the corresponding first batteries 31, 31', 31", 31"'. Each bolt 53 is inserted into the corresponding through hole 511 and screwed into the corresponding second screw hole 312 to lock the corresponding bracket to the top surface of the corresponding first battery 31, 31', 31", 31'" .第 The second frame body 52 is formed outside the first frame body 51, and the height of the second frame body 52 in the vertical direction Z is higher than the height of the first frame body 51. In this embodiment, the height of the second frame 52 of the first bracket 5 is higher than the height of the second frame 52 of the second bracket 5', and the height of the second frame 52 of the second bracket 5'is higher than the third frame 5 The height of the second frame 52 of the third bracket 5" is higher than that of the second frame 52 of the fourth bracket 5"".

Each second telescopic rod 6 is fixedly connected between the first frame bodies 51 of the corresponding two brackets. Two of the second telescopic rods 6 are spaced apart in the front-rear direction X and can be stretched in the left-right direction Y, and the remaining two second telescopic rods 6 are spaced apart in the left-right direction Y and can be stretched in the front-rear direction X. In this embodiment, each second telescopic rod 6 is a hydraulic telescopic rod, and has a tube body 61 and a telescopic rod body 62 that can be telescopically passed through the tube body 61. The opposite ends of the tube body 61 and the telescopic rod body 62 are fixedly connected to the first frame body 51 of the corresponding bracket by welding, for example.

The seats 7, 7', 7", and 7"' each have a seat plate 71, a connecting plate 72 connected to the front end of the seat plate 71, and a backrest plate 73 connected to the rear end of the seat plate 71. Four seats The connecting plates 72 of 7, 7', 7" and 7"' are fixedly connected to the first bracket 5, the second bracket 5', the third bracket 5" and the fourth bracket 5'" by welding, for example The top of the second frame 52. Among them, the height of the seat 7 disposed on the first bracket 5 is higher than the height of the seat 7'disposed on the second bracket 5', and the height of the seat 7'disposed on the second bracket 5' Higher than the height of the seat 7" provided on the third bracket 5", the height of the seat 7 provided on the third bracket 7" is higher than the height of the seat 7"" provided on the fourth bracket 5"'.

The supply of hydraulic oil into the tube body 61 of each second telescopic rod 6 drives the telescopic rod body 62 to move, so that the telescopic rod body 62 can telescope relative to the tube body 61. The second telescopic rod 6 can drive the first battery 31, 31', 31", 31'" in the separated state through the first bracket 5, the second bracket 5', the third bracket 5" and the fourth bracket 5"' And the merged state, and drive the seats 7, 7', 7", 7"' in a separated state separated from each other and spaced apart as shown in FIG. 1, and stacked on each other as shown in FIG. 7. Change between stacked states together.

Referring to FIGS. 1 and 2, when the frame 1 is in the deployed position shown in FIG. 1, the four first batteries 31, 31 ′, 31 ″, 31 ″ are in a separated state separated from each other, and the second battery unit 4 The second batteries 41, 41' are installed in the installation space 33 and connected to the first battery unit 3. The seats 7, 7', 7", 7"' are separated from each other and spaced apart, and Each seat 7, 7', 7", 7"' can provide a user to ride. At this time, the electric vehicle body 100 can be used in a multi-person mode for multiple people to ride, thereby satisfying the user Larger cabin space is required for the use of multi-person rides.

To change the use mode of the electric vehicle body 100, the operation method is as follows: Referring to FIG. 5, first, each wheel 12 is detached from the corresponding corner plate 11. Then, loosen each bolt 32 and move away from the corresponding first screw hole 311 and the corresponding through hole 111, so that the battery module 2 can be moved away from the corner plate 11 of the frame 1.

Referring to FIG. 6, forcing the front second battery 41 forward, the front second battery 41 slides forward and moves away from the corresponding two first batteries 31, 31' and the second battery 41’. Apply a force to pull the second battery 41 at the rear, slide the second battery 41 at the rear and move away from the corresponding two first batteries 31", 31'" and the second battery 41'. Apply a force to the left to pull the left The second battery 41 slides the left second battery 41 to the left and moves away from the corresponding two first batteries 31, 31" and the second battery 41'. Applying force to the right pulls the right second battery 41 to slide the right second battery 41 to the right and move away from the corresponding two first batteries 31', 31''' and the second battery 41'. Thereby, the second battery unit 4 can be detached from the installation space 33.

4 and 7, by supplying hydraulic oil to the tube body 132 of each first telescopic rod 13, the telescopic rod body 133 is driven to contract into the tube body 132. The two corner plates 11 at the front end move backward and the two corner plates 11 at the rear end move forward, causing the frame 1 to contract in the front-rear direction X. At the same time, the two corner plates 11 on the left move to the right and the two corner plates 11 on the right move to the left, causing the frame 1 to contract in the left-right direction Y. Thereby, the frame 1 can be changed to the folded state shown in FIG. 7.

On the other hand, by supplying hydraulic oil to the tube 61 of each second telescopic rod 6, the telescopic rod 62 is driven to contract into the tube 61. The first bracket 5 and the second bracket 5'located at the front end will drive the two first batteries 31, 31' and the two seats 7, 7'respectively to move backward, and the third bracket 5" and the fourth bracket located at the rear end 5''' will drive the two first batteries 31'', 31''' and the two seats 7'', 7''' to move forward, respectively, so that the first battery module 3 and the seats 7, 7', 7", 7'" shrink in X direction. At the same time, the first bracket 5 and the third bracket 5" on the left side will drive the two first batteries respectively 31, 31" and the two seats 7, 7" respectively move to the right, and the second bracket 5'and the fourth bracket 5"" on the right side will drive the two first batteries 31', 31'" and Drive the two seats 7', 7''' to the left, respectively, so that the first battery module 3 and the seats 7, 7', 7'', 7''' contract in the left and right direction Y. This makes the first The battery module 3 changes to the merged state shown in FIG. 7, and the seats 7, 7 ′, 7 ″, 7 ″′ change to the stacked state stacked on top of each other. Among them, these seats 7, 7', 7", 7"' are only provided for single riders when stacked.

Referring to FIGS. 7, 8 and 9, the first battery module 3 is placed down in the frame 1 so that each first screw hole 311 of each first battery 31, 31 ′, 31 ″, 31 ′″ Align with the corresponding through holes 111. Next, each bolt 32 is threaded through the corresponding through hole 111 and screwed into the corresponding first screw hole 311, so that each corner plate 11 is locked to the corresponding first battery 31, 31', 31" , 31''' Outer edge. Finally, each wheel 12 is locked to the outer side of the corresponding corner plate 11, that is, the use mode of the electric vehicle body 100 is changed. At this time, the electric vehicle body 100 is in a single-use mode that can be used by a single person, thereby satisfying the user's need for a smaller cabin space for single-person riding. By detaching the second battery unit 4 from the first battery unit 3, the weight of the battery module 2 is greatly reduced, thereby also significantly reducing the overall weight of the electric vehicle body 100, thereby making the electric vehicle body 100 In single use mode, it can reduce energy consumption and greatly improve energy saving effect.

To change the electric vehicle body 100 and return to the multi-person use mode of FIG. 1, the operation method is as follows: Referring to FIGS. 7, 8 and 9, each wheel 12 is first detached from the corresponding corner plate 11. Then, loosen each bolt 32 and move away from the corresponding first screw hole 311 and the corresponding through hole 111, so that the first battery unit 3 can be moved away from the corner plate 11 of the frame 1.

5, 6 and 7, the telescopic rod body 62 of each second telescopic rod 6 is driven to extend, so that each second telescopic rod 6 passes through the first bracket 5, the second bracket 5 ′, the third bracket 5 ″ and the first The four brackets 5''' drive the first batteries 31, 31', 31'', 31''' to return to the separated state, and drive the seats 7, 7', 7'', 7''' to return to the separated state. Then, the second battery 41' is placed in the installation space 33. Then, a second battery 41 is inserted backward between the first batteries 31, 31', so that the second battery 41 passes through the first slider 411 in the first Slide the sliding slot 313 to a position where the second slider 412 snaps into the fourth sliding slot 414 at the front end of the second battery 41'. Insert another second battery 41 forward into the first battery 31", 31'" In between, the second battery 41 slides in the first sliding slot 313 through the first slider 411 to a position where the second slider 412 is caught in the fourth sliding slot 414 at the rear end of the second battery 41'. Insert another second battery 41 to the right between the first batteries 31, 31", so that the second battery 41 slides in the second sliding slot 314 through the second slider 412 until the first slider 411 is engaged with the first The position of the third slide groove 413 on the left side of the second battery 41'. Insert the remaining second battery 41 to the left between the first batteries 31', 31''', so that the second battery 41 passes through the second slider 412 The second sliding slot 314 slides to a position where the first slider 411 is engaged with the third sliding slot 413 on the right side of the second battery 41'. By this, the second battery unit 4 is assembled in the installation space 33.

Referring to FIGS. 1 and 5, the battery module 2 is placed down in the frame 1, so that the first screw holes 311 of the first batteries 31, 31', 31", 31'" and the corresponding through holes 111 Align. Then, thread each bolt 32 into the corresponding through hole 111 and screw into the corresponding first screw hole 311, so that each corner plate 11 is locked to the corresponding first battery 31, 31', 31", 31'" Outside edge. Finally, each wheel 12 is locked to the outer side of the corresponding corner plate 11, and the electric vehicle body 100 changes and returns to the multi-person use mode shown in FIG. 1.

In summary, the electric vehicle body 100 of this embodiment can be selectively operated by the frame 1 to switch between the expanded state and the collapsed state, and the battery module 2 and the seat assembly 50 Designed so that the user can operate the electric vehicle body 100 according to different usage environments and conditions to change to a desired usage mode. In addition, by detaching the second battery unit 4 from the first battery module 3, the weight of the battery module 2 is greatly reduced, thereby also greatly reducing the overall weight of the electric vehicle body 100, thereby making the electric vehicle The vehicle body 100 can reduce energy consumption in the single-use mode to greatly improve the energy saving effect, so it can indeed achieve the purpose of cost invention.

However, the above are only examples of the present invention, and should not be used to limit the scope of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still classified as This invention covers the patent.

100: electric car body

10: Chassis

1: Frame

11: corner plate

12: Wheel

13: The first telescopic rod

14: Space

2: battery module

50: seat assembly

7: Seat

7’: Seat

7”: Seat

7''': Seat

Claims (9)

An electric vehicle body includes: a chassis, including: a frame defining a space, the frame can be selectively operated to change between an expanded state and a collapsed state, the frame includes four Angle plate, and four first telescopic rods, each of the first telescopic rods is fixedly connected between the corresponding two of the angle plates, two of the first telescopic rods are spaced in a front-rear direction and can be along one It is telescopic in the left-right direction perpendicular to the front-rear direction. The remaining two of the first telescopic rods are spaced apart in the left-right direction and can be extended and contracted in the front-rear direction, so that the frame can be simultaneously extended in the front-rear direction and the left-right direction The expanded state and the collapsed state are changed between; a battery module is disposed in the space and includes a first battery unit coupled to the frame, and a first battery unit detachably assembled to the first battery unit Two battery units, when the frame is in the deployed state, the second battery unit is assembled to the first battery unit, and when the frame is in the collapsed state, the second battery unit is detached from the first battery Unit; and a seat assembly, including a plurality of seats provided on the chassis, when the frame is in the deployed state, the seats are in a separated state separated from each other, when the frame is in In the collapsed state, the seats are in a stacked state stacked on top of each other. The electric vehicle body according to claim 1, wherein the first battery unit includes four first batteries detachably coupled to the equal angle plates, respectively, and the seat The assembly further includes four brackets respectively disposed at the tops of the first batteries, and four second telescopic rods, each of the second telescopic rods is fixedly connected between corresponding two of the brackets, and the second telescopic rods Two of the rods are spaced along the front-rear direction and can be stretched in the left-right direction, and the other two of the second telescopic rods are spaced in the left-right direction and can be stretched in the front-rear direction. The number of the seats is four and They are respectively installed on the brackets. The electric vehicle body according to claim 2, wherein each of the seats has a seat plate, and a connecting plate connected to the front end of the seat plate and fixedly connected to the corresponding bracket. The electric vehicle body according to claim 3, wherein the brackets are a first bracket, a second bracket, a third bracket, and a fourth bracket, the first bracket and the second bracket The left and right directions are spaced apart, the third bracket and the fourth bracket are spaced apart in the left and right direction, the first bracket and the third bracket are spaced apart in the front and rear direction, and the second bracket and the fourth bracket are spaced along the front and back Spaced apart in directions, the height of the first bracket in a vertical direction is higher than the height of the second bracket, the height of the second bracket in the vertical direction is higher than the height of the third bracket, and the height of the third bracket in the vertical direction is higher than the height Fourth bracket height. The electric vehicle body according to claim 2, 3 or 4, wherein the second battery unit includes a plurality of detachably connected second batteries, and when the frame is in the deployed state, the first The batteries are separated from each other, and the second batteries are assembled between the first batteries. When the frame is in the collapsed state, the second batteries are detached from the first batteries, and the first batteries Merge with each other. The electric vehicle body according to claim 5, wherein the number of the second batteries is five, four of the second batteries are each assembled between two corresponding first batteries, and the remaining one It is assembled in the middle of the aforementioned four second batteries. A chassis of an electric vehicle body includes: a frame defining a space, the frame can be selectively operated to change between an expanded state and a collapsed state, the frame includes four corner plates, And four first telescopic rods, each of the first telescopic rods is fixedly connected between two corresponding corner plates, two of the first telescopic rods are spaced in a front-rear direction and can be perpendicular to the The left and right directions of the front-rear direction are telescopic, and the remaining two of the first telescopic rods are spaced apart in the left-right direction and can be extended and contracted in the front-rear direction, so that the frame can be extended and contracted in the front-rear direction and the left-right direction at the same time in the deployed state And a transition between the collapsed states; and a battery module, which is disposed in the space and includes a first battery unit coupled to the frame, and a second battery detachably assembled to the first battery unit Unit, when the frame is in the deployed state, the second battery unit is assembled to the first battery unit, and when the frame is in the collapsed state, the second battery unit is detached from the first battery unit. The chassis of an electric vehicle body according to claim 7, wherein the first battery unit includes four first batteries detachably coupled to the isometric plates, and the second battery unit includes a plurality of detachably When the frame is in the deployed state, the first batteries are separated from each other, and the second batteries are assembled between the first batteries when the frame is in the collapsed state , The second batteries are detached from the first batteries, and the first batteries A battery is merged with each other. The chassis of an electric vehicle body according to claim 8, wherein the number of the second batteries is five, and four of the second batteries are each assembled between two corresponding first batteries, and The remaining one is assembled in the middle of the aforementioned four second batteries.

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