An electric vehicle running base

Abstract

The application discloses an electric vehicle running base, which comprises a battery frame used for bearing a power battery, a front cabin frame assembly fixedly connected to the front end of the battery frame, and a rear cabin frame assembly fixedly connected to the rear end of the battery frame. The front cabin frame assembly and the rear cabin frame assembly each comprise two oppositely arranged longitudinal beam frames and a stabilizing beam fixed between the two longitudinal beam frames. The two longitudinal beam frames of the front cabin frame assembly are used for fixing a front suspension system and a steering system of the vehicle, and the two longitudinal beam frames of the rear cabin frame assembly are used for fixing a rear suspension system of the vehicle.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle technology, and more specifically, to an electric vehicle driving platform. Background Technology

[0002] The degree of chassis integration in electric vehicles has attracted much attention. A common design is to install the battery on the bottom frame of the vehicle body, with longitudinal beams at both ends of the passenger compartment, and a subframe connecting the suspension system and steering system between the longitudinal beams.

[0003] However, such a base cannot exist independently of the body, which is related to the styling. It usually has the unique requirements of a single model, and the base has a complex structure, occupies a lot of space, and has low modularization and integration efficiency. Summary of the Invention

[0004] One object of the present invention is to provide a new technical solution for an electric vehicle driving base.

[0005] In one aspect, the present invention provides an electric vehicle driving base, the driving base including a battery frame for carrying a power battery;

[0006] A front compartment frame assembly fixedly connected to the front end of the battery frame;

[0007] The rear compartment frame assembly is fixedly connected to the rear end of the battery frame. Both the front compartment frame assembly and the rear compartment frame assembly include two opposing longitudinal beam frames and a stabilizing beam fixed between the two longitudinal beam frames. The two longitudinal beam frames of the front compartment frame assembly are used to fix the front suspension system and steering system of the vehicle, and the two longitudinal beam frames of the rear compartment frame assembly are used to fix the rear suspension system of the vehicle.

[0008] Optionally, it also includes a powertrain, the powertrain including a motor mount assembly fixed to the rear cabin frame assembly.

[0009] Optionally, the two longitudinal beam frames of the front cabin frame assembly are symmetrically arranged with respect to the centerline of the vehicle's length direction;

[0010] The front cabin frame assembly and the rear cabin frame assembly are located on the same side of the longitudinal beam frame, which are symmetrical along the centerline in the vehicle width direction.

[0011] Optionally, the base also includes a cushioning assembly;

[0012] The battery frame includes battery frame longitudinal beams and battery frame cross beams connected to the battery frame longitudinal beams;

[0013] The buffer assembly is connected to one end of the longitudinal beam frame, and the battery frame longitudinal beam is connected to the other end of the longitudinal beam frame.

[0014] Optionally, the buffer assembly includes an upper buffer beam and a lower buffer beam spaced apart along the vehicle height direction;

[0015] An upper insertion part and a lower insertion part are provided at the front end of the longitudinal beam frame, and the upper insertion part and the lower insertion part are fixedly connected to the upper buffer beam and the lower buffer beam respectively.

[0016] Optionally, the longitudinal beam frame includes:

[0017] The lower longitudinal beam is located at the bottom.

[0018] The upper longitudinal beam located above the lower longitudinal beam; and

[0019] Columns used to connect the upper longitudinal beam and the lower longitudinal beam.

[0020] The upper insertion part is located at the end of the upper longitudinal beam, and the lower insertion part is located at the end of the lower longitudinal beam.

[0021] Optionally, the battery frame longitudinal beams of the battery frame include a bending-resistant structure and an energy-absorbing structure, with the energy-absorbing structure located outside the bending-resistant structure.

[0022] The rear end of the longitudinal beam frame includes a first fixing surface and a second fixing surface. The first fixing surface is perpendicular to the second fixing surface. The first fixing surface is fixed to the outer surface of the inner wall of the bending structure, and the second fixing surface is fixed to the upper surface of the battery frame longitudinal beam.

[0023] Optionally, the lower longitudinal beam of the longitudinal beam frame is bent inward in the horizontal direction, and the portion of the rear end of the upper longitudinal beam of the longitudinal beam frame that connects with the lower longitudinal beam is located at the bending position of the lower longitudinal beam.

[0024] Optionally, the battery frame crossbeams located at both ends of the battery frame extend between the two longitudinal beam frames and are fixed to the side walls at the bending positions of the two longitudinal beam frames, and the stabilizing beam is located outside the battery frame in the longitudinal direction of the vehicle.

[0025] Optionally, the battery frame crossbeam located in the middle of the battery frame is used for fixed connection with the vehicle seat.

[0026] By integrating the subframe mounting and fixing functions into the front and rear frame assemblies, and fixing the suspension and steering systems via the longitudinal beam frame, the complex base assembly, large space occupation, and low modular integration efficiency caused by setting up a separate subframe structure are avoided. This significantly reduces the number of vehicle parts and improves the modularity and integration of the electric vehicle base.

[0027] Other features and advantages of this specification will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of this specification and, together with their description, serve to explain the principles of this specification.

[0029] Figure 1 This is a top view of the electric vehicle driving base in an embodiment of the present invention;

[0030] Figure 2 This is a side view (outer view of the vehicle) of the longitudinal beam frame of the electric vehicle driving base in an embodiment of the present invention.

[0031] Figure 3 This is a side view (inner view of the vehicle) of the longitudinal beam frame of the electric vehicle driving base in an embodiment of the present invention.

[0032] Figure 4 This is a partial side view of the electric vehicle driving base in an embodiment of the present invention;

[0033] Figure 5 This is a partial top view of the electric vehicle driving base in an embodiment of the present invention;

[0034] Figure 6 This is a side view of the battery frame of the electric vehicle driving base in an embodiment of the present invention;

[0035] Figure 7 This is a disassembly diagram of the electric vehicle driving base and the vehicle body in an embodiment of the present invention. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] According to one embodiment of the present invention, see Figure 1 An electric vehicle chassis 600 is provided, comprising a battery frame 100 for supporting a power battery; a front chassis frame assembly 200 fixedly connected to the front end of the battery frame 100; and a rear chassis frame assembly 300 fixedly connected to the rear end of the battery frame 100. Both the front chassis frame assembly 200 and the rear chassis frame assembly 300 include two opposing longitudinal beam frames 400 and a stabilizing beam 410 fixed between the two longitudinal beam frames 400. The two longitudinal beam frames 400 of the front chassis frame assembly 200 are used to fix the front suspension system and steering system of the vehicle, while the rear chassis frame assembly 300 is used to fix the rear suspension system of the vehicle.

[0038] like Figure 1 and Figure 7 As shown, the base 600 comprises three parts: a front compartment frame assembly 200, a battery frame 100, and a rear compartment frame assembly 300, which are connected sequentially from front to rear along the length of the vehicle. The front compartment frame assembly 200, the battery frame 100, and the rear compartment frame assembly 300 can be connected by means of processes such as bolting, gluing, drilling screws, self-piercing riveting, or welding, or other connection methods, which can be selected by those skilled in the art.

[0039] In this way, the front cabin frame assembly 200, battery frame 100, and rear cabin frame assembly 300 achieve the integration of the power battery with the chassis driving system (CTC). This enables the base 600 in this invention to operate independently. Consequently, the base 600 can be adapted to different vehicle body designs.

[0040] Specifically, the battery frame 100 includes battery frame longitudinal beams 131 and battery frame crossbeams 132 connected to the battery frame longitudinal beams 131. The front compartment frame assembly 200 and the rear compartment frame assembly 300 include paired longitudinal beam frames 400, which are fixed to the battery frame 100 along the width direction of the vehicle. Specifically, they are fixed to the ends of the two battery frame longitudinal beams 131 that are arranged opposite each other along the width direction.

[0041] It is understood that the battery frame may not be fixed at the end of the longitudinal beam 131. For example, it may be fixed at the cross beam 132 of the battery frame, or it may be fixed at other positions of the battery frame.

[0042] For example, the longitudinal beam frame 400 is a one-piece molded structure, formed, for example, by injection molding or stamping. Specifically, the longitudinal beam frame 400 can be a one-piece structure formed by high-pressure vacuum aluminum casting technology.

[0043] See Figure 1 A stabilizing beam 410 is provided between the two longitudinal beam frames 400. The stabilizing beam 410 is a structure that provides a stable connection between the two longitudinal beam frames 400. For example, Figure 1 The stabilizing beam 410 in the structure is an x-structure.

[0044] By incorporating the subframe mounting and fixing functions into the front cabin frame assembly 200 and the rear cabin frame assembly 300, and fixing the suspension system and steering system through the longitudinal beam frame 400, the problems of complex assembly, large space occupation, and low modular integration efficiency of the base 600 caused by setting up a subframe structure are avoided. This significantly reduces the number of vehicle parts and improves the modularity and integration of the electric vehicle base 600.

[0045] In one embodiment, a powertrain (not shown) is also included, comprising a motor mount assembly fixed to the rear cabin frame assembly 300. A motor mount mounting surface is provided on the longitudinal beam frame 400 of the rear cabin frame assembly 300 to support the motor mount. This method of fixing the powertrain to the longitudinal beam frame 400 further provides clearance space for the battery frame 100, effectively increasing the battery capacity.

[0046] In one embodiment, such as Figure 1 As shown, the two longitudinal beam frames 400 of the front cabin frame assembly 200 are symmetrically arranged with respect to the centerline of the vehicle length direction, and the longitudinal beam frames 400 of the front cabin frame assembly 200 and the rear cabin frame assembly 300 on the same side are symmetrical along the centerline of the vehicle width direction.

[0047] In this way, parts can be shared between the longitudinal beam frame 400 of the front cabin frame assembly 200 and the rear cabin frame assembly 300, which can effectively reduce costs.

[0048] Furthermore, the base 600 can be equipped with a symmetrically arranged rear-mounted steer-by-wire system, enabling the vehicle to achieve more driving modes. For example, it can realize functions such as rear-wheel drive, rear-wheel steering, or U-turns.

[0049] In one embodiment, see Figure 4 The base 600 also includes a buffer assembly; the buffer assembly is connected to one end of the longitudinal beam frame 400, and the battery frame longitudinal beam 131 is connected to the other end of the longitudinal beam frame 400.

[0050] In this way, the impact force from the buffer components can be transferred from the vehicle to the battery frame longitudinal beam 131 via the longitudinal beam frame 400, thereby forming an effective impact force transfer.

[0051] Specifically, see Figure 4 The buffer assembly includes an upper buffer beam 121 and a lower buffer beam 122 spaced apart along the vehicle height direction. An upper insertion portion 111 and a lower insertion portion 112 are provided at the end of the longitudinal beam frame 400 facing the buffer assembly, and the upper insertion portion 111 and the lower insertion portion 112 are fixedly connected to the upper buffer beam 121 and the lower buffer beam 122 respectively. Adaptive slots (not shown in the figure) are provided at the connection positions of the upper buffer beam 121 and the lower buffer beam 122 corresponding to the upper insertion portion 111 and the lower insertion portion 112. Corresponding threaded holes are provided on the slots and the upper insertion portion 111 and the lower insertion portion 112 to improve the connection strength between the buffer assembly and the longitudinal beam frame 400 through a threaded connection. It is understood that threaded holes may also be omitted, and the buffer assembly and the longitudinal beam frame 400 may be welded or riveted.

[0052] By connecting the longitudinal beam frame 400 to the upper buffer beam 121 and the lower buffer beam 122 through the insertion method, two collision paths, upper and lower, can be formed through the upper and lower insertion parts 111 and 112 of the upper and lower buffer beams 121 and 122 respectively via the longitudinal beam frame 400 (see...). Figure 4 (The direction indicated by the dashed arrow) can effectively improve a car's collision avoidance capabilities.

[0053] Optionally, the battery frame longitudinal beam 131 can be made of extruded aluminum, thereby enabling it to act as a crushing energy absorber in a collision.

[0054] Specifically, such as Figure 2 As shown, the longitudinal beam frame 400 includes a lower longitudinal beam 422 located at the bottom; an upper longitudinal beam 421 located above the lower longitudinal beam 422; and a column 423 for connecting the upper longitudinal beam 421 and the lower longitudinal beam 422. An upper insertion part 111 is located at the end of the upper longitudinal beam 421, and a lower insertion part 112 is located at the end of the lower longitudinal beam 422.

[0055] See Figure 4 The lower longitudinal beam 422 extends horizontally, with one end connected to the lower buffer beam 122 and the other end fixed to the battery frame longitudinal beam 131. The upper longitudinal beam 421 and the lower longitudinal beam 422 are arranged vertically along the vehicle height direction.

[0056] Figure 2 The upper longitudinal beam 421 is an arched structure. The upper longitudinal beam 421, the lower longitudinal beam 422 and the column 423 form a through hole 429, which is used to allow automotive components such as the power half shaft and steering gear to pass through.

[0057] In this way, the impact forces from the upper buffer beam 121 and the lower buffer beam 122 are transferred to the battery frame longitudinal beam 131 through the upper longitudinal beam 421 and the lower longitudinal beam 422, respectively. This impact path effectively reduces the impact stress on the longitudinal beam frame 400.

[0058] Furthermore, such as Figure 6 As shown, the battery frame longitudinal beam 131 of the battery frame 100 includes a bending-resistant structure 135 and an energy-absorbing structure 136, with the energy-absorbing structure 136 located on the outer side of the bending-resistant structure 135. "Outer side" refers to the side located outside the vehicle body. Both the bending-resistant structure 135 and the energy-absorbing structure 136 are grille structures extending along the length of the vehicle. Reinforcing beams 430 extending in the same direction are provided on the inner walls of the upper and lower surfaces of the bending-resistant structure 135 to prevent the battery frame longitudinal beam 131 from bending during a collision.

[0059] See Figure 2 and Figure 3The rear end of the longitudinal beam frame 400 includes a first fixing surface 424 and a second fixing surface 425, with the first fixing surface 424 and the second fixing surface 425 arranged perpendicularly.

[0060] For example, the first fixing surface 424 is fixed to the outer surface of the inner wall of the bending structure 135, and the second fixing surface 425 is fixed to the upper surface of the battery frame longitudinal beam 131. The first fixing surface 424 is located on the upper surface of the rear end of the longitudinal beam frame 400 and extends horizontally. The second fixing surface 425 is located on the side surface of the longitudinal beam frame 400 and is arranged vertically. When connected with the battery frame longitudinal beam 131, the first fixing surface 424 and the second fixing surface 425 abut against a battery frame crossbeam 132.

[0061] In this way, the battery frame longitudinal beam 131 of the battery frame 100 can fully absorb energy during a collision and achieve minimum deformation protection of the battery cells.

[0062] Furthermore, unlike traditional battery frames which only provide strength support for the power battery itself, the battery frame longitudinal beam 131 in this invention also serves as a load-bearing path during both frontal and side collisions of the entire vehicle, thus meeting the requirements for cell safety and occupant safety.

[0063] Optionally, such as Figure 2 As shown, a flanged structure 115 for connecting to the sheet metal of the upper body 500 is also provided on the battery frame longitudinal beam 131. This connection technology seals the entire passenger compartment, fulfilling the sill function of the traditional body-in-white 500. The battery cover also functions as the floor of the traditional body-in-white 500, thus eliminating the need for the body-in-white 500 floor assembly. Simultaneously, the sill and battery frame are integrated, further improving the integration of the base 600. Furthermore, this increases the space in the width and height directions of the battery, thereby increasing its capacity.

[0064] In one example, such as Figure 1 , Figure 3 and Figure 4 As shown, the lower longitudinal beam 422 of the longitudinal beam frame 400 bends inward in the horizontal direction, and the portion where the rear end of the upper longitudinal beam 421 of the longitudinal beam frame 400 connects with the lower longitudinal beam 422 is located at the bending position of the lower longitudinal beam 422. This design achieves better impact force transmission and improves the structural strength of the longitudinal beam frame 400.

[0065] In one example, such as Figure 1 As shown, the battery frame crossbeams 132 located at both ends of the battery frame 100 extend between the two longitudinal beam frames 400 and are fixed to the side walls at the bending positions of the two longitudinal beam frames 400. The stabilizing beam 410 is located outside the battery frame 100 in the length direction of the vehicle to further improve the structural strength of the front compartment frame assembly 200 and the rear compartment frame assembly 300.

[0066] Specifically, see Figure 5 The battery frame crossbeams 132 located at both ends of the battery frame 100 are the front crossbeam 133 and the rear crossbeam. The two ends of the front crossbeam 133 are symmetrically connected to the longitudinal beam frame 400. Cooling water pipe connectors and high-voltage wire connectors are installed inside the front crossbeam 133, connecting to the vehicle's cooling water pipes and high-voltage wires respectively. The connection method between the rear crossbeam and the longitudinal beam frame 400 is the same as that between the front crossbeam 133 and the longitudinal beam frame 400, and will not be described further here.

[0067] Optionally, a motor mounting surface is provided on the rear crossbeam. In this way, both the battery frame 100 and the longitudinal beam frame 400 can support the motor mount, which helps to further distribute the vertical force of the motor mount during vehicle operation.

[0068] Optionally, the battery frame crossbeam 132 located in the middle of the battery frame 100 is used for fixed connection with the vehicle seat. By directly mounting the seat onto the battery frame crossbeam, the battery frame crossbeam replaces the function of the traditional seat crossbeam on the vehicle floor. In this way, there is no need to set up a separate seat crossbeam; the battery frame 100 takes on the seat mounting function.

[0069] In one example, see Figure 7 An upper cover plate and a lower cover plate are sealed and connected to the upper and lower surfaces of the battery frame 100. The upper cover plate serves as the vehicle floor, and the seat is mounted on the upper cover plate and connected to the middle battery frame crossbeam 132 by bolts. The battery frame longitudinal beam 131 serves as the vehicle sill 500. In this way, the integration of the base 600 can be further improved.

[0070] Optionally, in order to enable the base 600 to adapt to the changing needs of different vehicle sizes, the wheelbase and track width of the vehicle can be adjusted by setting the lengths of the battery frame crossbeam 132 and battery frame longitudinal beam 131 of different sizes.

[0071] Optionally, such as Figure 5 As shown, the inner side of the longitudinal beam frame 400 opposite to the bent position is the third fixing surface 426, which is a plane. A diagonal beam 428 is provided between the battery frame side beam and the front crossbeam 133 of the battery frame 100. When the longitudinal beam frame 400 is connected to the battery frame 100, the third fixing surface 426 is in contact with and fixedly connected to the diagonal beam 428. Reinforcing flanges are provided on the upper and lower end faces of the third fixing surface 426. When the third fixing surface 426 is in contact with the diagonal beam 428, the diagonal beam 428 is embedded between the two reinforcing flanges.

[0072] A support plate 427 extends from the lower surface of the inclined beam 428 toward a position close to the longitudinal beam frame 400. The support plate 427 is horizontally positioned, and when the longitudinal beam frame 400 is connected to the battery frame 100, at least a portion of the lower part of the longitudinal beam frame 400 is pressed against the support plate 427.

[0073] In this way, the connection strength between the longitudinal beam frame 400 and the battery frame 100 can be further improved.

[0074] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An electric vehicle running base, characterized in that, include: A battery frame for supporting a power battery; A front compartment frame assembly fixedly connected to the front end of the battery frame; The rear compartment frame assembly is fixedly connected to the rear end of the battery frame. Both the front compartment frame assembly and the rear compartment frame assembly include two opposing longitudinal beam frames and a stabilizing beam fixed between the two longitudinal beam frames. The two longitudinal beam frames of the front compartment frame assembly are used to fix the front suspension system and steering system of the vehicle, and the two longitudinal beam frames of the rear compartment frame assembly are used to fix the rear suspension system of the vehicle. The longitudinal beam frame includes a lower longitudinal beam located at the bottom and an upper longitudinal beam located above the lower longitudinal beam; the longitudinal beam frame also includes a column for connecting the upper longitudinal beam and the lower longitudinal beam; the lower longitudinal beam of the longitudinal beam frame is bent inward in the horizontal direction, and the rear end of the upper longitudinal beam of the longitudinal beam frame is connected to the lower longitudinal beam at the bent position of the lower longitudinal beam.

2. The electric vehicle driving base according to claim 1, characterized in that, It also includes a powertrain, which includes a motor mount assembly that is fixed to the rear cabin frame assembly.

3. The electric vehicle driving base according to claim 1, characterized in that, The two longitudinal beam frames of the front cabin frame assembly are symmetrically arranged with respect to the centerline of the vehicle's length direction; The front cabin frame assembly and the rear cabin frame assembly are located on the same side of the longitudinal beam frame, which are symmetrical along the centerline in the vehicle width direction.

4. The electric vehicle driving base according to any one of claims 1-3, characterized in that, The base also includes a cushioning assembly; The battery frame includes battery frame longitudinal beams and battery frame crossbeams connected to the battery frame longitudinal beams; the buffer assembly is connected to one end of the longitudinal beam frame, and the battery frame longitudinal beams are connected to the other end of the longitudinal beam frame.

5. The electric vehicle driving base according to claim 4, characterized in that, The buffer assembly includes an upper buffer beam and a lower buffer beam spaced apart along the vehicle height direction; An upper insertion part and a lower insertion part are provided at the front end of the longitudinal beam frame, and the upper insertion part and the lower insertion part are fixedly connected to the upper buffer beam and the lower buffer beam respectively.

6. The electric vehicle driving base according to claim 5, characterized in that, The upper insertion part is located at the end of the upper longitudinal beam, and the lower insertion part is located at the end of the lower longitudinal beam.

7. The electric vehicle driving base according to claim 1, characterized in that, The battery frame's longitudinal beams include a bending-resistant structure and an energy-absorbing structure, with the energy-absorbing structure located outside the bending-resistant structure. The rear end of the longitudinal beam frame includes a first fixing surface and a second fixing surface. The first fixing surface is perpendicular to the second fixing surface. The first fixing surface is fixed to the outer surface of the inner wall of the bending structure, and the second fixing surface is fixed to the upper surface of the battery frame longitudinal beam.

8. The electric vehicle driving base according to claim 1, characterized in that, The battery frame crossbeams located at both ends of the battery frame extend between the two longitudinal beam frames and are fixed to the side walls at the bending positions of the two longitudinal beam frames. The stabilizing beam is located outside the battery frame in the longitudinal direction of the vehicle.

9. The electric vehicle driving base according to claim 1, characterized in that, The battery frame crossbeam located in the middle of the battery frame is used for fixed connection with the car seat.

Images