Shared vehicle body assembly for pure electric and range-extended electric vehicles; pure electric vehicles and range-extended electric vehicles

Abstract

This invention relates to the field of vehicle body assembly technology, and provides a vehicle body assembly, a pure electric vehicle, and a range-extended vehicle that can be used together with pure electric vehicles and range-extended vehicles. The assembly includes a front seat crossbeam assembly, a left sill assembly, a right sill assembly, and a front floor sill assembly. The front seat crossbeam assembly has a C-shaped groove with a flanged structure, and is fastened to the front floor body and welded. Its front end face is spliced ​​and welded to the front longitudinal beam cover plate, the front baffle, and the center channel connecting plate. The left and right sill assemblies are composed of a sill connecting plate and a sill inner plate body, which are nested and pressed together and welded. The sill connecting plate has a flanged structure and is butt-welded to the left or right side panel assembly. The sill inner plate body has a C-shaped groove, and its lower surface has multiple holes corresponding to welded multiple battery pack mounting reinforcement plate assemblies. The two end faces of the front floor sill assembly are sequentially welded to the left front vertical plate assembly, the right front vertical plate assembly, the left sill assembly, and the right sill assembly. It can be matched with both range-extended and pure electric power systems.

Description

Technical Field

[0001] This invention relates to the field of vehicle body assembly technology, and particularly to a vehicle body assembly shared by pure electric and range-extended vehicles, as well as pure electric vehicles and range-extended vehicles. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] More and more automakers are starting to develop new energy vehicles such as pure electric, range-extended, hybrid, and hydrogen fuel cell vehicles. The development of multiple new energy technologies can enhance a company's competitiveness and technological capabilities, but it also presents challenges such as product diversification, complexity, differentiation, and development cycles due to the simultaneous development of multiple technology paths. Furthermore, the long development and acceptance cycles of large sheet metal molds, if not standardized, will pose significant challenges to product development and market launch.

[0004] Currently, major OEMs are simultaneously developing various new energy technologies such as pure electric and range-extended electric vehicles in their new product development. While maintaining a balanced development of various new energy technologies, they aim to provide users with a wider range of product choices. However, due to the significant differences in the principles and hardware structures of pure electric and range-extended electric vehicles, developing two platforms simultaneously requires a large investment of time and money and also poses a great challenge to the production line. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a vehicle body assembly shared by pure electric and range-extended vehicles, as well as a pure electric vehicle and a range-extended vehicle. By improving the front seat front crossbeam assembly, left sill assembly, and right sill assembly of the front floor assembly, and the front seat front crossbeam assembly of the front floor assembly, the commonality of these components is achieved. This enables the commonality of the upper vehicle body panels, allowing it to be compatible with both range-extended and pure electric power systems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The first aspect of the present invention provides a vehicle body assembly shared by pure electric and range-extended vehicles.

[0008] A vehicle body assembly shared by pure electric and range-extended vehicles includes a front seat front crossbeam assembly, a left sill assembly, a right sill assembly, and a front floor sill assembly;

[0009] The front crossbeam assembly of the front seat adopts a C-shaped groove with a flange structure. It is fastened to the front floor body and welded. The front end face is spliced ​​and welded to the front longitudinal beam cover plate, the front baffle and the central channel connecting plate.

[0010] The left and right sill assemblies are composed of a sill connecting plate and a sill inner plate body through nested pressing and welding; the sill connecting plate has a flanged structure and is butt-welded to the left or right side sill assembly; the sill inner plate body has a C-shaped groove and multiple holes on its lower surface to weld multiple battery pack mounting reinforcement plate assemblies.

[0011] The front floor sill assembly has Z-shaped upward 90° bends on both sides, and the two end faces are welded to the left front vertical plate assembly, the right front vertical plate assembly, the left sill assembly and the right sill assembly in sequence.

[0012] Furthermore, it also includes the left sill reinforcement beam assembly and the right sill reinforcement beam assembly;

[0013] Multiple sill connecting plates are evenly distributed on the lower surfaces of the left and right sill reinforcement beam assemblies, and are aligned and welded with the flanges of the left or right sill assembly.

[0014] Furthermore, the upper surface of the front floor sill assembly is welded from front to back with two front longitudinal beam cover plates, a front baffle and a central channel connecting plate, a front seat front crossbeam assembly, four battery front central mounting brackets, an airbag ECU mounting plate and a front seat rear crossbeam assembly.

[0015] The front end face of the front floor sill assembly overlaps and is riveted and welded to the lower part of the front baffle body, and the rear end face overlaps and is riveted and welded to the rear body of the front floor.

[0016] Furthermore, it also includes the left front vertical panel assembly, the right front vertical panel assembly, and the front windshield lower crossbeam assembly;

[0017] The lower end face of the front windshield lower crossbeam assembly is welded to the upper part of the front baffle body in the X direction.

[0018] The inner side of the left front vertical plate assembly is welded to the front windshield lower crossbeam assembly, the upper part of the front fender body, the lower part of the front fender body, and the front fender left support plate assembly from top to bottom. The outer side of the left front vertical plate assembly is welded to the left front wheel arch assembly, the left sill assembly, and the left side panel assembly from top to bottom. The left front vertical plate assembly uses an inward flange structure on the top surface to perform XZ plane normal pressure welding with the front windshield lower crossbeam assembly, and uses an outward flange structure on the side surface to perform positive Y direction fastening welding with the left side panel assembly.

[0019] The inner side of the right front vertical plate assembly is welded to the front windshield lower crossbeam assembly, the upper part of the front fender body, the lower part of the front fender body, and the front fender right support plate assembly from top to bottom. The outer side of the right front vertical plate assembly is welded to the right front wheel arch assembly, the right sill assembly, and the right side panel assembly from top to bottom. The right front vertical plate assembly uses an inward flange structure on the top surface to perform XZ plane normal pressure welding with the front windshield lower crossbeam assembly, and uses an outward flange structure on the side surface to perform positive Y direction fastening welding with the right side panel assembly.

[0020] Furthermore, the upper cover plate of the front longitudinal beam adopts a bent V-angle design, with the bending angle being the same as that of the lower part of the front baffle body, so as to be welded to the lower part of the front baffle body. The plane of the upper cover plate of the front longitudinal beam is welded to the front floor body. The upper cover plate of the front longitudinal beam, the lower part of the front baffle body, and the front floor body are welded together to form an integral structure. The Y-direction welding positions of the upper cover plate of the front longitudinal beam on both sides are aligned with the Y-direction of the right front longitudinal beam assembly and the left front longitudinal beam assembly, respectively.

[0021] Furthermore, it also includes the rear assembly of the right sill inner panel and the rear assembly of the left sill inner panel;

[0022] The outer flange of the rear part of the right sill inner panel assembly is welded to the inner flange of the right side panel assembly.

[0023] The outer flange of the rear part of the left sill inner panel assembly is welded to the inner flange of the left side panel assembly.

[0024] Furthermore, it also includes the rear floor assembly;

[0025] The front bending surface of the rear floor body assembly overlaps and is welded to the rear bending surface of the middle floor assembly. The two sides overlap the inner flanges of the left and right rear longitudinal beam assemblies respectively and are fastened by welding and drilling screws. The rear end provides support and fixation for the rear floor storage box assembly.

[0026] Furthermore, it also includes the left rear connecting plate of the rear floor, the rear inner panel assembly, and the rear outer panel assembly;

[0027] The front end of the left rear connecting plate of the rear floor is bent and overlapped with the left rear longitudinal beam body and connected by welding. The side overlapped with the left rear longitudinal beam body and fastened by bolts. The rear end is welded to the rear inner panel assembly.

[0028] The inner surface of the rear inner panel assembly is respectively welded to the rear end flanges of the left rear connecting plate of the rear floor, the rear connecting plate of the rear floor, and the right rear connecting plate of the rear floor.

[0029] The rear outer panel assembly has two flange structures on the upper and lower sides. The first flange is used to strengthen the body strength. The second flange is connected to and welded to the flange of the rear inner panel assembly. After welding the surface of the middle groove, a fixing bracket is installed to fix the rear bumper assembly.

[0030] The left side of the welded body of the rear inner panel assembly and the rear outer panel assembly is sandwiched between the left rear longitudinal beam assembly and the rear anti-collision beam assembly and is fixedly connected by bolts, while the right side is sandwiched between the right rear longitudinal beam assembly and the rear anti-collision beam assembly and is fixedly connected by bolts.

[0031] A second aspect of the present invention provides a pure electric vehicle that uses a vehicle body assembly shared by pure electric and range-extended vehicles as described in the first aspect.

[0032] A third aspect of the present invention provides a range-extended vehicle that uses a vehicle body assembly shared by pure electric and range-extended vehicles as described in the first aspect.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] 1. This invention improves the front seat front crossbeam assembly, left sill assembly, right sill assembly, and front seat front crossbeam assembly of the front floor assembly, thereby achieving the commonality of these components. This enables the commonality of the upper vehicle body panels, allowing them to be matched with both range-extended and pure electric power systems.

[0035] 2. This invention achieves commonality of the left and right front vertical plate assemblies and the lower crossbeam assembly of the engine compartment, the front seat front crossbeam assembly, the front floor sill assembly, the left sill assembly, the right sill assembly, the left sill reinforcement beam assembly, and the right sill reinforcement beam assembly of the front floor assembly, and the rear sill inner panel rear assembly, the right sill inner panel rear assembly, the rear floor body assembly, the rear bulkhead inner panel assembly, the rear bulkhead outer panel assembly, the rear anti-collision beam assembly, the rear floor left rear connecting plate, and the rear floor rear connecting plate of the rear floor assembly through the common components of the lower vehicle body. In summary, the common components of the lower vehicle body achieve commonality of the left side bulkhead assembly, the right side bulkhead assembly, and the roof system of the upper vehicle body, and the common components of the upper vehicle body achieve commonality of the outer covering components. Attached Figure Description

[0036] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an improper limitation of the invention.

[0037] Figure 1 This is a top view of the upper body assembly of Embodiment 1 of the present invention;

[0038] Figure 2 This is a front view of the upper body assembly of Embodiment 1 of the present invention;

[0039] Figure 3 This is a front view of the left side assembly of Embodiment 1 of the present invention;

[0040] Figure 4 This is a left view of the left side assembly of Embodiment 1 of the present invention;

[0041] Figure 5 This is a front view of the right side enclosure assembly of Embodiment 1 of the present invention;

[0042] Figure 6 This is a left view of the right side enclosure assembly of Embodiment 1 of the present invention;

[0043] Figure 7This is a front view of the top cover system of Embodiment 1 of the present invention;

[0044] Figure 8 This is a top view of the top cover system of Embodiment 1 of the present invention;

[0045] Figure 9 This is a left view of the engine compartment assembly according to Embodiment 1 of the present invention;

[0046] Figure 10 This is a front view of the front baffle beam of Embodiment 1 of the present invention;

[0047] Figure 11 This is a top view of the front baffle beam of Embodiment 1 of the present invention;

[0048] Figure 12 This is a front view of the front bumper beam assembly of Embodiment 1 of the present invention;

[0049] Figure 13 This is a top view of the front bumper beam assembly of Embodiment 1 of the present invention;

[0050] Figure 14 This is a front view of the lower anti-collision beam assembly according to Embodiment 1 of the present invention;

[0051] Figure 15 This is a top view of the lower anti-collision beam assembly according to Embodiment 1 of the present invention;

[0052] Figure 16 This is a top view of the engine compartment assembly according to Embodiment 1 of the present invention;

[0053] Figure 17 This is a front view of the right front longitudinal beam assembly according to Embodiment 1 of the present invention;

[0054] Figure 18 This is a view of the right front longitudinal beam assembly of Embodiment 1 of the present invention;

[0055] Figure 19 This is a front view of the left front longitudinal beam assembly of Embodiment 1 of the present invention;

[0056] Figure 20 This is a view of the left front longitudinal beam assembly of Embodiment 1 of the present invention;

[0057] Figure 21 This is a front view of the right front wheel arch assembly according to Embodiment 1 of the present invention;

[0058] Figure 22 This is a top view of the right front wheel arch assembly according to Embodiment 1 of the present invention;

[0059] Figure 23 This is a front view of the left front wheel arch assembly according to Embodiment 1 of the present invention;

[0060] Figure 24 This is a top view of the left front wheel arch assembly according to Embodiment 1 of the present invention;

[0061] Figure 25 This is a front view of the front-end structure assembly of Embodiment 1 of the present invention;

[0062] Figure 26 This is a top view of the front-end structure assembly of Embodiment 1 of the present invention;

[0063] Figure 27 This is an isometric side view of the engine compartment assembly according to Embodiment 1 of the present invention;

[0064] Figure 28 This is a front view of the upper part of the front baffle body in Embodiment 1 of the present invention;

[0065] Figure 29 This is a top view of the front baffle body of Embodiment 1 of the present invention;

[0066] Figure 30 This is a front view of the lower part of the front baffle body in Embodiment 1 of the present invention;

[0067] Figure 31 This is a top view of the lower part of the front baffle body in Embodiment 1 of the present invention;

[0068] Figure 32 This is a front view of the left support plate of the front baffle in Embodiment 1 of the present invention;

[0069] Figure 33 This is a top view of the left support plate of the front baffle in Embodiment 1 of the present invention;

[0070] Figure 34 This is a front view of the right support plate of the front baffle in Embodiment 1 of the present invention;

[0071] Figure 35 This is a top view of the right support plate of the front baffle in Embodiment 1 of the present invention;

[0072] Figure 36 This is a front view of the left front vertical plate assembly of Embodiment 1 of the present invention;

[0073] Figure 37 This is a top view of the left front vertical plate assembly of Embodiment 1 of the present invention;

[0074] Figure 38 This is a front view of the right front vertical plate assembly according to Embodiment 1 of the present invention;

[0075] Figure 39 This is a top view of the right front vertical plate assembly of Embodiment 1 of the present invention;

[0076] Figure 40 This is a front view of the lower windshield crossbeam assembly according to Embodiment 1 of the present invention;

[0077] Figure 41 This is a top view of the front windshield lower crossbeam assembly according to Embodiment 1 of the present invention;

[0078] Figure 42 This is a top view of the front floor assembly of Embodiment 1 of the present invention;

[0079] Figure 43 This is a front view of the front floor assembly of Embodiment 1 of the present invention;

[0080] Figure 44 This is a front view of the upper cover plate of the front longitudinal beam in Embodiment 1 of the present invention;

[0081] Figure 45 This is a top view of the upper cover plate of the front longitudinal beam in Embodiment 1 of the present invention;

[0082] Figure 46 This is a front view of the front baffle and the middle channel connecting plate of Embodiment 1 of the present invention;

[0083] Figure 47 This is a top view of the front baffle and the middle channel connecting plate of Embodiment 1 of the present invention;

[0084] Figure 48 This is a front view of the front seat crossbeam assembly of Embodiment 1 of the present invention;

[0085] Figure 49 This is a bottom view of the front seat front crossbeam assembly of Embodiment 1 of the present invention;

[0086] Figure 50 This is a front view of the mounting bracket in the front part of the battery according to Embodiment 1 of the present invention;

[0087] Figure 51 This is a left view of the mounting bracket in the front part of the battery according to Embodiment 1 of the present invention;

[0088] Figure 52 This is a front view of the airbag ECU mounting plate according to Embodiment 1 of the present invention;

[0089] Figure 53 This is a left view of the airbag ECU mounting plate according to Embodiment 1 of the present invention;

[0090] Figure 54 This is a front view of the front seat rear crossbeam assembly of Embodiment 1 of the present invention;

[0091] Figure 55 This is a bottom view of the front seat rear crossbeam assembly of Embodiment 1 of the present invention;

[0092] Figure 56 This is an isometric side view of the front floor assembly of Embodiment 1 of the present invention;

[0093] Figure 57 This is a front view of the front floor sill assembly according to Embodiment 1 of the present invention;

[0094] Figure 58This is a front view of the front floor and rear body of Embodiment 1 of the present invention;

[0095] Figure 59 This is a schematic diagram of the left door sill assembly according to Embodiment 1 of the present invention;

[0096] Figure 60 This is a schematic diagram of the right door sill assembly according to Embodiment 1 of the present invention;

[0097] Figure 61 This is a schematic diagram of the left sill reinforcement beam in Embodiment 1 of the present invention;

[0098] Figure 62 This is a schematic diagram of the right sill reinforcement beam in Embodiment 1 of the present invention;

[0099] Figure 63 This is a front view of the rear bottom plate assembly according to Embodiment 1 of the present invention;

[0100] Figure 64 This is a front view of the bottom plate assembly in Embodiment 1 of the present invention;

[0101] Figure 65 This is a bottom view of the bottom plate assembly in Embodiment 1 of the present invention;

[0102] Figure 66 This is a front view of the rear assembly of the right sill inner panel in Embodiment 1 of the present invention;

[0103] Figure 67 This is a top view of the rear assembly of the right sill inner panel in Embodiment 1 of the present invention;

[0104] Figure 68 This is a front view of the rear assembly of the left sill inner panel in Embodiment 1 of the present invention;

[0105] Figure 69 This is a top view of the rear assembly of the left sill inner panel in Embodiment 1 of the present invention;

[0106] Figure 70 This is a schematic diagram of the left rear longitudinal beam assembly in Embodiment 1 of the present invention;

[0107] Figure 71 This is a schematic diagram of the right rear longitudinal beam assembly in Embodiment 1 of the present invention;

[0108] Figure 72 This is a view of the rear floor assembly according to Embodiment 1 of the present invention;

[0109] Figure 73 This is a front view of the rear floor body assembly according to Embodiment 1 of the present invention;

[0110] Figure 74 This is a top view of the rear floor body assembly according to Embodiment 1 of the present invention;

[0111] Figure 75This is a front view of the left rear connecting plate of the rear floor in Embodiment 1 of the present invention;

[0112] Figure 76 This is a top view of the left rear connecting plate of the rear floor in Embodiment 1 of the present invention;

[0113] Figure 77 This is a schematic diagram of the rear floor storage box assembly according to Embodiment 1 of the present invention;

[0114] Figure 78 This is a front view of the right rear connecting plate of the rear floor in Embodiment 1 of the present invention;

[0115] Figure 79 This is a top view of the right rear connecting plate of the rear floor in Embodiment 1 of the present invention;

[0116] Figure 80 This is a front view of the rear floor connecting plate of Embodiment 1 of the present invention;

[0117] Figure 81 This is a top view of the rear floor connecting plate of Embodiment 1 of the present invention;

[0118] Figure 82 This is a front view of the rear inner panel assembly according to Embodiment 1 of the present invention;

[0119] Figure 83 This is a top view of the rear inner panel assembly according to Embodiment 1 of the present invention;

[0120] Figure 84 This is a schematic diagram of the rear outer panel assembly according to Embodiment 1 of the present invention;

[0121] Figure 85 This is a schematic diagram of the rear anti-collision beam assembly according to Embodiment 1 of the present invention;

[0122] Figure 86 This is a front view of the outer cover of Embodiment 1 of the present invention;

[0123] Figure 87 This is a top view of the outer cover of Embodiment 1 of the present invention;

[0124] Figure 88 This is a left view of the outer cover of Embodiment 1 of the present invention;

[0125] Figure 89 This is an isometric side view of the outer cover of Embodiment 1 of the present invention;

[0126] Figure 90 This is a structural diagram of a pure electric vehicle according to Embodiment 2 of the present invention;

[0127] Figure 91 This is a structural diagram of a range-extended vehicle according to Embodiment 2 of the present invention. Detailed Implementation

[0128] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0129] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0130] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0131] In this invention, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any component or element in this invention. They should not be construed as limiting the invention.

[0132] In this invention, terms such as "fixed connection," "connected," and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0133] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0134] Example 1

[0135] Embodiment 1 of the present invention provides a vehicle body assembly that can be used by both pure electric and range-extended vehicles.

[0136] While developing a variety of new energy products, major automakers are exploring common platforms that can integrate various new energy technologies to adapt to the commonality and platformization of parts and molds for different new energy vehicle models.

[0137] This embodiment provides a shared vehicle body assembly for both pure electric and range-extended vehicles. By sharing some parts of the lower body, the upper body can be shared for both pure electric (EV) and range-extended (REEV) vehicles. Differentiation of parts in the engine compartment of the lower body allows for different powertrain layouts for pure electric and range-extended vehicles. Differentiation of parts in the front floor sill assembly of the lower body allows for different battery, fuel tank, and exhaust pipe layouts for pure electric and range-extended vehicles. Differentiation of parts in the rear floor assembly of the lower body allows for different powertrain and exhaust rear-discharge layouts for pure electric and range-extended vehicles. The shared upper body allows for shared exterior body panels. Therefore, this achieves the goal of using a shared upper body and exterior body panels for two different new energy vehicle models, thus providing a shared vehicle body for both types of new energy vehicles.

[0138] This embodiment provides a vehicle body assembly shared by pure electric and range-extended vehicles, including a lower body assembly, an upper body assembly, and an outer body panel.

[0139] (2) For the upper body assembly, such as Figure 1 and Figure 2 As shown, it includes a left side panel assembly 1, a right side panel assembly 2, and a top cover system 3.

[0140] For both pure electric and range-extended vehicles, the left side panel assembly 1, the right side panel assembly 2, and the roof system 3 are interchangeable.

[0141] like Figure 3 and Figure 4 As shown, the left side panel assembly 1 is formed by the front part assembly of the left side panel inner panel and the rear part assembly of the left side panel inner panel, which are connected by welding at the groove and flange of the left side panel outer panel assembly. After the two are fastened together, they are welded to form a sealed cavity structure in the A, B, and C pillar areas. By increasing the cross-sectional area, the overall strength of the A, B, and C pillar areas can be improved.

[0142] The left side panel assembly 1 is welded to the left front vertical panel assembly 16, the rear part of the left sill inner panel assembly 33, and the left rear longitudinal beam assembly 34 by flange butt welding, thus welding the left side panel assembly and the lower body assembly into a whole. Among them, the outer edge of the left rear longitudinal beam assembly 34 overlaps with the rear part of the left side panel inner panel assembly. However, the inner edge has a different welding inner flange height due to the difference in installation space between the pure electric battery and the range extender fuel tank at the Z-axis height of the middle floor assembly 31.

[0143] The left side panel assembly 1 and the right side panel assembly 2 are in the same process and station, and the left and right side welding robots are welded synchronously. The front part of the left side panel inner panel assembly has a welded part - the left connecting plate of the front top crossbeam, and the upper part of the rear part of the left side panel inner panel assembly has a welded part - the lower connecting plate of the left rear top crossbeam, the upper reinforcing plate of the left D-pillar, and the upper connecting plate of the left rear top crossbeam.

[0144] like Figure 5 and Figure 6 As shown, the right side panel assembly 2 is formed by the front part assembly of the right side inner panel and the rear part assembly of the right side inner panel, which are connected by welding at the groove and flange of the right side outer panel assembly. After the two are fastened together, they are welded to form a sealed cavity structure in the A, B, and C pillar areas. By increasing the cross-sectional area, the overall strength of the A, B, and C pillar areas can be improved.

[0145] The right side panel assembly 2 is welded to the right front vertical panel assembly 17, the rear right sill inner panel assembly 32, and the right rear longitudinal beam assembly 35 via flanged butt welding, thus welding the right side panel assembly and the lower body assembly into a single unit. The difference in the height of the welded inner flange of the right rear longitudinal beam assembly 35 is due to the difference in installation space between the pure electric battery and the range extender fuel tank at the Z-axis height of the middle floor assembly 31 at this location, resulting in a difference in the height of the welded inner flange of the front section of the longitudinal beam.

[0146] The right side panel assembly 2 is in the same process and station as the left side panel assembly. The welding robots on the left and right sides are welded synchronously. The front part of the right side panel inner panel assembly has a welded part - the right connecting plate of the front top crossbeam. The upper rear part of the right side panel inner panel assembly has a welded part - the lower connecting plate of the right rear top crossbeam, the upper reinforcing plate of the right D-pillar, and the upper connecting plate of the right rear top crossbeam.

[0147] Among them, the only difference between the outer panel of the right side assembly 2 of the pure electric and range-extended electric vehicles is the oil filler port; the molds are interchangeable.

[0148] Among them, the upper rear section of the right-side inner panel assembly has local differences due to the fuel filling system on the right side.

[0149] like Figure 7 and Figure 8 As shown, the roof system 3 includes a front roof crossbeam inner plate, a front roof crossbeam assembly, a rear roof crossbeam assembly, and a rear roof crossbeam inner plate. The front roof crossbeam inner plate and the front roof crossbeam assembly are press-welded together to form a front welded cavity, which is then press-welded to the left and right connecting plates of the front roof crossbeam on both sides via grooves. Similarly, the rear roof crossbeam assembly and the rear roof crossbeam inner plate are press-welded together to form a rear welded cavity, which is press-welded to the welded bodies composed of the lower connecting plate of the left rear roof crossbeam, the upper reinforcing plate of the left D-pillar, and the upper connecting plate of the left rear roof crossbeam on the left and right sides, respectively, as well as the welded bodies composed of the lower connecting plate of the right rear roof crossbeam, the upper reinforcing plate of the right D-pillar, and the upper connecting plate of the right rear roof crossbeam on the right side. These front and rear welded cavities connect the left and right side body assemblies into a single welded body on the top of the vehicle body, creating a cage-like body structure between the lower and upper body.

[0150] (2) The lower body assembly includes the engine compartment assembly, the front floor assembly, and the rear floor assembly.

[0151] (201) such as Figure 9 and Figure 16 and Figure 27 As shown, the engine compartment assembly includes: front fender crossbeam 4, front bumper beam assembly 5, lower bumper beam assembly 6, right front longitudinal beam assembly 7, left front longitudinal beam assembly 8, right front wheel arch assembly 9, left front wheel arch assembly 10, front end structure assembly 11, upper part of front fender body 12, lower part of front fender body 13, left support plate of front fender 14, right support plate of front fender 15, left front vertical plate assembly 16, right front vertical plate assembly 17, and lower crossbeam assembly of front windshield 18.

[0152] For both pure electric and range-extended vehicles, the left front vertical plate assembly 16, the right front vertical plate assembly 17, and the front windshield lower crossbeam assembly 18 are interchangeable; however, the front fender crossbeam 4, the front bumper beam assembly 5, the lower bumper beam assembly 6, the right front longitudinal beam assembly 7, the left front longitudinal beam assembly 8, the right front wheel arch assembly 9, the left front wheel arch assembly 10, the front end structure assembly 11, the upper part of the front fender body 12, the lower part of the front fender body 13, the left support plate of the front fender 14, and the right support plate of the front fender 15 are different.

[0153] ①Front baffle crossbeam 4, such as Figure 9 As shown, it is welded to the lower part of the engine compartment front fender (firewall), and welded to the left front wheel arch longitudinal beam assembly and the right front wheel arch longitudinal beam assembly to form a welded assembly. By employing an anti-concave structure design, it can better absorb energy and deform in the event of a frontal collision and a small offset collision. Figure 10 and Figure 11 As shown, the front baffle beam 4 adopts a W-shaped structure that fits tightly against the firewall, while the body itself uses a groove structure to increase its strength. For pure electric and range-extended vehicles, the difference in the Y-axis structural dimensions of the powertrain structure between range-extended and pure electric vehicles leads to differences in the installation distance and stress points of the longitudinal beams; therefore, the front baffle beam 4 is made as a different component.

[0154] ②Front bumper beam assembly 5, such as Figure 12 and Figure 13As shown, the use of an arc-shaped rectangular tube structure can meet the three-dimensional CAS curved surface of the front bumper. The rectangular tube has welded reinforcing ribs inside to effectively enhance the structural strength of the main body. Four L-shaped brackets are welded to the upper part for fixing the front bumper body. The left side has an internal welded threaded tube for fixing the tow hook. Two sets of four rivet bolts are provided on the lower sides to fix the front bumper crossbeam mounting connection outer plate. After being connected with the lower anti-collision beam assembly 6, it forms an integral structure, effectively increasing the force-bearing area of ​​the pedestrian's legs and improving the pedestrian protection score. Specifically, the front anti-collision beam assembly 5, the lower anti-collision beam assembly 6, and the front bumper crossbeam mounting connection outer plate are fixed together to form a rigid rectangular plane, which can effectively increase the contact area of ​​the pedestrian's legs and prevent the pedestrian from being caught under the vehicle. Two rectangular energy-absorbing boxes are welded to both sides of the arc-shaped rectangular tube. By drilling several through holes at the rounded corners of the rectangular tube, it can bend and weaken the impact energy during a collision. Square mounting end plates are welded to the end face of the rectangular tube. All the above welding constitutes the front anti-collision beam assembly. The anti-collision beam end plate has four mounting holes on each side, which connect to the right front wheel arch longitudinal beam assembly and the left front wheel arch longitudinal beam assembly respectively, thus forming an integral part with the vehicle. Due to the difference in the Y-axis mounting distance of the longitudinal beams between the range extender and pure electric vehicles, different parts are made.

[0155] ③ Lower anti-collision beam assembly 6, such as Figure 14 and Figure 15 As shown, the use of an arc-shaped rectangular tube structure can meet the three-dimensional CAS curved surface of the front bumper. Two sets of four rivet bolts are provided on both sides for fixing the front bumper crossbeam mounting connection outer plate. After being connected with the front anti-collision beam assembly 5, it forms an integral structure, effectively increasing the force-bearing area of ​​pedestrian legs and improving pedestrian protection scores. Two rectangular energy-absorbing boxes are welded to both sides of the arc-shaped rectangular tube. By drilling several through holes at the rounded corners of the rectangular tube, it can bend and weaken the impact energy during a collision. Triangular mounting end plates are welded to the end face of the rectangular tube. All of the above welding constitutes the lower anti-collision beam assembly. There are three mounting holes on each side of the anti-collision beam end plate, which connect to the front subframe assembly, thus forming an integral part with the whole vehicle. Due to the difference in the Y-axis mounting distance of the longitudinal beams of the range extender and pure electric vehicles, the lower anti-collision beam assembly 6 is a different part.

[0156] ④ Right front longitudinal beam assembly 7, such as Figure 17 and Figure 18As shown, a rectangular tube structure is formed by welding the right front longitudinal beam body and the right front longitudinal beam cover assembly. The opening size in the Y direction at the front end of this welded rectangular tube structure is larger than that at the rear end. The overall structure is an r-shaped structure. By increasing the opening size in the Y direction at the front end, the opening area is increased, which in turn increases the interface area between the front anti-collision beam assembly 5 and the right front longitudinal beam assembly 7 (increasing the cross-section and volume of the energy absorption box), thereby increasing the stress area and improving the energy absorption effect. The upper surface of the front R end face of the rectangular tube structure provides more welding area in the Y direction for the right front longitudinal beam wheel arch connecting beam assembly I, improving the strength of the welded structure. The right front longitudinal beam wheel arch connecting beam assembly I provides an installation and fixing point for the right fender. The lower surface of the front R end face of the rectangular tube structure is welded to the lower surface of the right front longitudinal beam wheel arch connecting beam assembly I. The lower surface of the right front longitudinal beam wheel arch connecting beam assembly I has an embedded welded subframe mounting nut seat M14x1.5x70. This subframe mounting nut seat is connected to the front mounting hole on the right side of the front subframe assembly by bolts. The upper surface of the rectangular welded structure sequentially provides mounting holes for the compressor bracket crossbeam base, mounting holes for the high-voltage electric heater bracket, welding planes and weld points for the right front wheel arch assembly. The right front longitudinal beam support plate II and the right connecting bracket for the front baffle triangular beam are welded to the root of the rear end face of the rectangular structure. The right front longitudinal beam assembly, including the right front longitudinal beam support plate II and the right connecting bracket for the front baffle triangular beam welded to the root, forms an "eight" shape at the root after welding, effectively fitting with the upper part 12 and the lower part 13 of the front baffle body, increasing the stress-bearing area, making the stress uniform, and improving structural strength and the transmission path of collision force. The right rear mounting reinforcement plate I and the right rear mounting reinforcement plate II of the front subframe are welded to the root of the rear end face of the rectangular structure, thus conformally welding with the front baffle crossbeam 4 and the lower part 13 of the front baffle body, and then welding with the right sill connecting plate to form the right front longitudinal beam assembly. The right front longitudinal beam assembly 7 is welded to the front baffle crossbeam 4 via groove fastening, forming four welds and diagonal supports at the sloping surface of the lower part 13 of the front baffle body. It is also welded to the right sill connecting plate to form a single unit. This fastening and four-sloping-surface support design effectively maintains the strength and rigidity of the longitudinal beam along the X-direction. Due to differences between the range extender and pure electric right front wheel arch assemblies and the change in collision boundary (X-direction spatial distance) resulting from powertrain replacement, the right front longitudinal beam assembly is made as a different part.

[0157] ⑤ Left front longitudinal beam assembly 8, such as Figure 19 and Figure 20As shown, a rectangular tube structure is formed by welding the left front longitudinal beam body and the left front longitudinal beam cover assembly. The opening size in the Y direction at the front end of this welded structure is larger than that at the rear end. The overall structure is an r-shaped structure. By increasing the opening size in the Y direction at the front end, the opening area is increased, which in turn increases the docking interface area between the front anti-collision beam assembly 5 and the left front longitudinal beam assembly (increasing the cross-section and volume of the energy absorption box), thereby increasing the stress area and improving the energy absorption effect. The upper surface of the front R end face of the rectangular structure provides more welding area in the Y direction for the left front longitudinal beam wheel cover connecting beam assembly I, improving the strength of the welded structure. The left front longitudinal beam wheel cover connecting beam assembly I provides an installation and fixing point for the left fender. The lower surface of the front R end face of the rectangular tube structure is welded to the lower surface of the left front longitudinal beam wheel cover connecting beam assembly I. The lower surface of the left front longitudinal beam wheel cover connecting beam assembly I has an embedded welded subframe mounting nut seat M14x1.5x70. This subframe mounting nut seat is connected to the front mounting hole on the left side of the front subframe assembly by bolts. The upper surface of the rectangular welding structure is sequentially provided with mounting holes for the compressor bracket crossbeam base, mounting holes for the electric compressor bracket, welding plane and welding points for the left front wheel arch assembly. The left front longitudinal beam support plate II and the left connecting bracket of the front baffle triangular beam are welded to the root of the rear end face of the rectangular structure. The left front longitudinal beam assembly includes the left front longitudinal beam support plate II and the left connecting bracket of the front baffle triangular beam welded at the root. After welding, it forms an "eight" shape at the root, which can effectively fit with the upper part 12 and the lower part 13 of the front baffle body, increase the stress area, make the stress uniform, and improve the structural strength and the transmission path of the collision force. The left rear mounting reinforcement plate I and the left rear mounting reinforcement plate II of the front subframe are welded to the root of the rear end face of the rectangular structure, and then welded to the front baffle crossbeam and the lower part 13 of the front baffle body, and then connected to the left sill plate to form the left front longitudinal beam assembly. The left front longitudinal beam assembly is welded to the front fender crossbeam 4 via groove fastening, forming four welds and diagonal supports at the sloping surface of the lower part 13 of the front fender body, and is integrated with the left sill connecting plate through welding. This fastening and four-sloping-surface support design effectively maintains the strength and rigidity of the longitudinal beam along the X direction. Due to the differences between the range-extended and pure electric left front wheel arch assemblies and the change in collision boundary (X-direction spatial distance) after powertrain replacement, the left front longitudinal beam assembly is made as a different part.

[0158] ⑥ Right front wheel arch assembly 9, such as Figure 21 and Figure 22As shown, the right front shock absorber mount is welded together from the right front wheel arch side reinforcement beam, the right front wheel arch rear end plate, and the right front shock absorber mount reinforcement plate. The right front shock absorber mount is designed with a protrusion, waist-shaped holes, large round holes, irregular triangular holes, and mounting bolts. The three evenly distributed waist-shaped mounting holes around the large round hole are fixed to the right front air spring assembly with bolts, which serves to connect the upper and lower body of the vehicle. At the same time, the large round hole in the middle can ensure that when the vehicle goes over potholes or bumps, the impact or interference between the right front air spring assembly and the right front wheel arch assembly caused by the downward pressure of the upper body or the upward jump of the suspension system can prevent abnormal noises and malfunctions during driving. The irregular triangular holes on the outside of the round hole have the same function as the round hole, which can prevent impact or interference with the right upper front control arm assembly and the right upper rear control arm assembly, thus preventing abnormal noises and malfunctions during driving. The three round mounting holes inside the large round hole are connected to the heat pump upper crossbeam assembly with bolts, which can improve the torsional rigidity of the entire vehicle. The right front wheel arch assembly 9 is welded to the right front longitudinal beam assembly 7, the upper part of the front baffle body 12, and the right vertical plate body of the front compartment to form an inverted U-shaped structure with a lower seal. Due to the difference in the powertrain, the difference in the X-direction position of the steering gear in the front compartment leads to the difference in the suspension system. At the same time, due to the difference in front wheel load and vehicle weight, the right front wheel arch assembly of the range extender and the pure electric vehicle are made as different parts.

[0159] ⑦ Left front wheel arch assembly 10, such as Figure 23 and Figure 24 As shown, the left front shock absorber mount is welded together from the left front wheel arch side reinforcement beam, the left front wheel arch rear end plate, and the left front shock absorber mount reinforcement plate. The left front shock absorber mount is designed with a protrusion, waist-shaped holes, large round holes, irregular triangular holes, and mounting bolts. The three evenly distributed waist-shaped mounting holes around the large round hole are fixed to the left front air spring assembly by bolts, which serves to connect the upper and lower body of the vehicle. At the same time, the large round hole in the middle can ensure that when the vehicle goes over potholes or bumps, the impact or interference between the left front air spring assembly and the left front wheel arch assembly caused by the downward pressure of the upper body or the upward jump of the suspension system can prevent abnormal noises and malfunctions during driving. The irregular triangular holes on the outside of the round hole have the same function as the round hole, which can prevent impact or interference with the left upper front control arm assembly and the left upper rear control arm assembly, thus preventing abnormal noises and malfunctions during driving. The three round mounting holes inside the large round hole are connected to the heat pump upper crossbeam assembly by bolts, which can improve the torsional rigidity of the entire vehicle. The left front wheel arch assembly is welded to the left front longitudinal beam assembly 8, the upper part of the front baffle body 12, and the left vertical plate body of the front compartment to form an inverted U-shaped structure with a lower seal. Due to the difference in the powertrain, the difference in the X-direction position of the steering gear in the front compartment leads to the difference in the suspension system. At the same time, due to the difference in front wheel load and vehicle weight, the left front wheel arch assembly of the range extender and the pure electric vehicle are made as different parts.

[0160] ⑧ Front-end structure assembly 11, such as Figure 25 and Figure 26As shown, the plastic frame has a U-shaped outer contour and a V-shaped inner contour. Both ends are thin-walled squares with square holes and four mounting bolts. The front structure assembly 11 is fixed in series with the front bumper beam assembly 5, the left front longitudinal beam assembly 8, and the right front longitudinal beam assembly 7 in the X direction via bolts. The directional hole structure design in the middle of the front structure assembly 11 can ensure effective docking between the front bumper beam assembly and the left and right front longitudinal beam assemblies. The front structure assembly 11 has two fixing holes in the middle to fix the central support, thereby fixing and connecting with the front bumper beam assembly in the middle to provide support. The upper surface of the front structure assembly 11 has a total of 10 holes. Among the six holes in the middle, four are threaded holes and two are positioning holes, used to position and fix the upper grille reinforcement bracket (indirectly fixing the front signal light assembly and the front bumper assembly). The two sets of holes on both sides fix the right front headlight assembly and the left front headlight assembly, respectively. The front-end structural assembly is fixed in a triangular structure by two sets of eight bolts at both ends and two bolts in the middle. This effectively ensures the installation accuracy and position of the right front headlight assembly, left front headlight assembly, front signal light assembly, and front bumper assembly. Due to the difference in the Y-axis spacing of the longitudinal beams, the front-end structural assembly of the range-extended electric vehicle and the pure electric vehicle are made of different parts.

[0161] ⑨ Upper part of the front baffle body 12, such as Figure 28 and Figure 29 As shown, the system is manufactured using sheet metal stamping, with both sides bent into obtuse angles. The main body provides multiple mounting and process holes, from left to right: a round hole for the battery positive terminal harness, a hole for weight reduction and reinforcement in a custom-shaped process, a round hole for the steering intermediate shaft assembly, a round hole for the integrated brake controller assembly, a vertical square water pipe hole for the automatic three-zone HVAC assembly, a horizontal waist-shaped air conditioning pipe hole for the automatic three-zone HVAC assembly, a horizontal square air intake duct hole for the automatic three-zone HVAC assembly, and several process and mounting holes. Due to differences in the powertrain, the position of the steering system's intermediate shaft differs, resulting in differences in the upper part of the front bumper body between the range extender and pure electric vehicles.

[0162] ⑩ Lower part of the front baffle body 13, such as Figure 30 and Figure 31 As shown, the upper part is designed with two rivet welding holes and mounting holes. It is welded and fixed to the front baffle beam 4 by rivet. By increasing the welding point in the middle, the strength can be improved and the risk of cracking can be reduced. The two sides also adopt the same bending angle as the upper part 12 of the front baffle body, forming a triangular bending shape on both sides. This can ensure that the lower part 13 of the front baffle body and the upper part 12 of the front baffle body are closely welded. The bending structure of the welded body on both sides can reduce the local deformation caused by the extrusion force transmitted by the right front longitudinal beam assembly and the left front longitudinal beam assembly when the front compartment is squeezed.

[0163] Front fender left support plate 14, such as Figure 32 and Figure 33As shown, an arc-triangular design is adopted, with the height of the cross-section increasing uniformly in the Z-direction. The Z-direction cross-section is largest at the welding and fastening point with the left front vertical plate assembly 16, and smallest at the welding point with the rightmost part of the lower part of the front baffle body 13. It is staggered with the front baffle crossbeam 4 and the lower part of the front baffle body 13 to form a welded body. This triangular welded body can strengthen the structure and reduce the risk of extrusion deformation and cracking when subjected to compression on the front and left sides. Due to the difference in the width of the longitudinal beams, the left support plate of the front baffle of the range extender and the pure electric vehicle are different parts.

[0164] Front fender right support plate 15, such as Figure 34 and Figure 35 As shown, an arc-triangular design is adopted, with the height of the cross-section increasing uniformly in the Z-direction. The Z-direction cross-section is largest at the welding and fastening point with the right front vertical plate assembly 17, and smallest at the welding point with the leftmost part of the lower part of the front baffle body 13. It is staggered with the front baffle crossbeam 4 and the lower part of the front baffle body 13 to form a welded body. This triangular welded body can strengthen the structure and reduce the risk of extrusion deformation and cracking when subjected to compression on the front and right sides. Due to the difference in the width of the longitudinal beams, the right support plate of the front baffle of the range extender and the pure electric vehicle are different parts.

[0165] Left front vertical panel assembly 16, such as Figure 36 and Figure 37 As shown, the inside of the car ( Figure 37 The upper part is welded from top to bottom to the front windshield lower crossbeam assembly 18, the upper part of the front fender body 12, the lower part of the front fender body 13, and the left support plate assembly of the front fender. The outer side is welded from top to bottom to the left front wheel arch assembly 10, the middle part of the outer plate of the left front wheel arch upper reinforcing beam, the left sill assembly 27, and the left side panel assembly 1. The left front vertical plate assembly 16 uses an inward flange structure on the top surface to perform XZ plane normal pressure welding with the front windshield lower crossbeam assembly, and the left front vertical plate assembly uses an outward flange structure on the side to perform positive Y direction fastening welding with the left side panel assembly 1. The body is strengthened and reduced in weight by using process round holes, rectangular holes, and reinforcing ribs. The left support plate 14 of the front fender is welded to the inside of the left front vertical plate assembly 16, which serves to strengthen the left front vertical plate assembly 16.

[0166] Right front vertical panel assembly 17, such as Figure 38 and Figure 39As shown, the inner side of the vehicle is welded from top to bottom to the front windshield lower crossbeam assembly 18, the upper part of the front baffle body 12, the lower part of the front baffle body 13, and the front baffle right support plate assembly. The outer side is welded from top to bottom to the right front wheel arch assembly 9, the middle part of the outer plate of the right front wheel arch upper reinforcing beam, the right sill assembly 28, and the right side panel assembly 2. The right front vertical plate assembly 17 uses an inward flange structure on its top surface to perform XZ plane normal pressure welding to the front windshield lower crossbeam assembly, and the right front vertical plate assembly uses an outward flange structure to perform positive Y-direction fastening welding to the right side panel assembly. The body is strengthened and reduced in weight by using process round holes, rectangular holes, and reinforcing ribs. The front baffle right support plate 15 is welded to the inner side of the right front vertical plate assembly 17, serving to strengthen the right front vertical plate assembly 17.

[0167] Front windshield lower crossbeam assembly 18, such as Figure 40 and Figure 41 As shown, it adopts a semi-circular arc structure, with the two end faces welded to the left front vertical plate assembly 16 and the right front vertical plate assembly 17 respectively, and the lower end face welded to the upper part 12 of the front baffle body in the X direction. There are multiple reinforcing ribs on the upper surface and slope of the body.

[0168] (202) Front floor assembly, such as Figure 42 and Figure 43 and Figure 56 As shown, it includes: front longitudinal beam upper cover plate 19, front baffle and center channel connecting plate 20, front seat front crossbeam assembly 21, battery front center mounting bracket 22, airbag ECU mounting plate 23, front seat rear crossbeam assembly 24, front floor sill assembly 25, front floor rear body 26, left sill assembly 27, right sill assembly 28, left sill reinforcement beam assembly 29, and right sill reinforcement beam assembly 30.

[0169] For both pure electric and range-extended electric vehicles, the front seat front crossbeam assembly 21, front floor sill assembly 25, left sill assembly 27, right sill assembly 28, left sill reinforcement beam assembly 29, and right sill reinforcement beam assembly 30 are common; however, the front longitudinal beam upper cover 19, front baffle and center channel connecting plate 20, battery front center mounting bracket 22, airbag ECU mounting plate 23, front seat rear crossbeam assembly 24, and front floor rear body 26 are different.

[0170] ① Front longitudinal beam top cover plate 19, such as Figure 44 and Figure 45As shown, a V-angle bending design is adopted, with the bending angle being the same as that of the lower part 13 of the front baffle body. The bend slope of the front longitudinal beam cover plate is welded to the lower part 13 of the front baffle body, and the flat surface of the front longitudinal beam cover plate is welded to the front floor body. The front longitudinal beam cover plate, the lower part of the front baffle body, and the front floor body are welded together to form an integral structure. The Y-direction welding positions of the front longitudinal beam cover plate on both sides are aligned with the Y-direction of the right front longitudinal beam assembly 7 and the left front longitudinal beam assembly 8, respectively. This alignment can effectively transfer the compressive force of the right and left front longitudinal beam assemblies from the engine compartment to the middle and rear areas of the vehicle body. For range-extended vehicles, the front longitudinal beam cover plate 19 is a non-straight beam, shaped like a "7"; for pure electric vehicles, the front longitudinal beam cover plate 19 is a straight beam. This difference is due to the structural reinforcement required for front collisions in range-extended vehicles.

[0171] ② Front baffle and center channel connecting plate 20, such as Figure 46 and Figure 47 As shown, the cross-section adopts a W-shaped structure. The front baffle and the middle channel connecting plate 20 are welded to the front floor body. The rear end of the front baffle and the middle channel connecting plate 20 is welded to the front seat front crossbeam assembly 21, strengthening the front floor body's resistance to front-end compression. Together with the left front longitudinal beam assembly 9 and the right front longitudinal beam assembly 7, it forms the third transmission path of the entire vehicle. The W-shaped groove in the middle increases the strength of the welded structure with the front floor body. The rear end plane of the front baffle and the middle channel connecting plate 20 provides four nut holes for fixing the combined inertial navigation system, and the front end plane of the front baffle and the middle channel connecting plate 20 provides two riveted welding studs for fixing the vehicle domain controller bracket. For range-extended vehicles, the front baffle and the middle channel connecting plate 20 is a closed structure; for pure electric vehicles, the front baffle and the middle channel connecting plate 20 undergoes weight reduction processes. The part welded to the lower part of the front baffle body only retains the welded flange, and the rest of the structure is hollowed out. This difference is due to the structural reinforcement required for front collisions in range-extended vehicles.

[0172] ③ Front seat front crossbeam assembly 21, such as Figure 48 and Figure 49 As shown, the cross-section adopts a C-shaped groove with a flanged structure, which is fastened to the front floor body and welded. The front end face is spliced ​​and welded to the front longitudinal beam cover plate 19, the front baffle, and the central channel connecting plate 20. This crossbeam can improve the side compression capacity of the vehicle body and can transmit longitudinal compression forces along three paths. It can also provide four fixing points for the left and right front seats.

[0173] ④ Mount bracket 22 in the front of the battery, such as Figure 50 and Figure 51As shown, the bottom end face is welded to the front floor body, and the rear end face is welded to the front seat rear crossbeam assembly 24. The internal cavity has welded nuts for securing the power battery pack assembly. The internal crossbeam of the power battery pack assembly is bolted to the lower vehicle body to form a rigid body, enhancing its resistance to lateral compression. For range-extended vehicles, the battery front mounting bracket 22 has a groove for reinforcement; for pure electric vehicles, the battery front mounting bracket 22 does not have a groove. This difference is due to the reinforcement of the range-extended battery.

[0174] ⑤ Airbag ECU mounting plate 23, such as Figure 52 and Figure 53 As shown, the bottom end face is welded to the front floor body, and the rear end face is welded to the front seat rear crossbeam assembly 24. The upper surface has five bosses and two grooves. The first three bosses have three welding nuts for fixing the airbag controller assembly, and the last two bosses have two welding nuts for fixing the armrest box bracket assembly. For the airbag ECU mounting plate 23, the range extender has larger width and height dimensions compared to the pure electric version.

[0175] ⑥ Front seat rear crossbeam assembly 24, such as Figure 54 and Figure 55 As shown, the bottom end face is welded to the front floor body, and the two side end faces are welded to the inner surfaces of the left sill assembly 27 and the right sill assembly 28, respectively. The front end face is welded to the four battery front mounting brackets 22 and the airbag ECU mounting plate 23, respectively. The upper surface is provided with two sets of four welding nuts and four locating pins for fixing the left and right front seat assemblies. The front seat rear crossbeam assembly, together with the front seat front crossbeam assembly, bears the lateral compression and strengthens the structural strength of the front floor body, used to fix and bear the weight of the seats, passengers, batteries, fuel tank, etc. For the front seat rear crossbeam assembly 24, the length difference of the reinforcing plates on both sides of the rear crossbeam results in a longer length for the range extender than for a pure electric vehicle, reinforcing the structure.

[0176] ⑦ Front floor sill assembly 25, such as Figure 57 As shown, the upper surface is welded sequentially from front to back to the following components: two front longitudinal beam cover plates 19, front baffle and center channel connecting plate 20, front seat front crossbeam assembly 21, four battery front mounting brackets 22, airbag ECU mounting plate 23, and front seat rear crossbeam assembly 24. The two end faces are sequentially welded to the left front vertical plate assembly 16, right front vertical plate assembly 17, left sill assembly 27, and right sill assembly 28. The front end face overlaps and is riveted to the lower part 13 of the front baffle body, and the rear end face overlaps and is riveted to the rear body 26 of the front floor. Both sides have Z-shaped upward 90° bends and flanges.

[0177] ⑧ Front floor and rear body 26, as Figure 58As shown, the front surface overlaps and is riveted to the front floor sill assembly 25. The two end faces are welded to the left sill assembly 27, right sill assembly 28, rear left sill inner panel assembly, and rear right sill inner panel assembly, respectively. The rear surface is press-welded to the middle floor crossbeam assembly, left rear longitudinal beam body, and right rear longitudinal beam body. The rear body of the front floor has a Z-direction bent flange at the rear end. By adjusting the flange height, it can accommodate the different Z-direction height requirements of EV batteries and REEV fuel tanks. It also has Z-direction bent flanges at a 90° upward angle on both sides. For the rear body of the front floor 26, the Z-direction height differs between range extender and pure electric vehicles due to the difference in fuel tank and battery. The range extender's Z-direction height is higher, matching the middle floor crossbeam body of the rear floor assembly.

[0178] ⑨ Left door sill assembly 27, such as Figure 59 As shown, the structure consists of a left sill connecting plate (with a flanged structure welded to the left side assembly 1 at the lower left corner) and a left sill inner plate body (a C-shaped groove with 90° outward flanged bends on both sides and two 46° bends in the middle) welded together by nesting and pressing. The welded structure is reinforced by adding a left sill inner plate reinforcing plate I at the second flange and joint. Four holes on the lower surface of the C-shaped groove of the left sill inner plate body correspond to four battery pack mounting reinforcing plate assemblies (with welding nuts for fixing the side surface of the power battery pack assembly). The four fixing points on one side are common for both range extender and pure electric vehicles. A final assembly lifting plate is welded to the lower end of the welded body.

[0179] ⑩ Right door sill assembly 28, such as Figure 60 As shown, the structure consists of a right sill connecting plate (with a flanged structure welded to the right side assembly 2 at the lower right corner) and a right sill inner plate body (a C-shaped groove with 90° outward flanged bends on both sides and two 46° bends in the middle) welded together by nesting and pressing. The welded structure is reinforced by adding a right sill inner plate reinforcing plate I at the second flange and joint. Four holes on the lower surface of the C-shaped groove of the right sill inner plate body correspond to four battery pack mounting reinforcing plate assemblies (with welding nuts for fixing the side surface of the power battery pack assembly). The four fixing points on one side are common for both range extender and pure electric vehicles. A final assembly lifting plate is welded to the lower end of the welded body.

[0180] Left door sill reinforcement beam assembly 29, such as Figure 61 As shown, the structure is a rectangular rigid frame with two reinforcing vertical ribs inside. The ends are cut at a 45° angle. Four sill connecting plates are evenly distributed on the lower surface. The two middle sill connecting plates are riveted and welded to the lower surface of the left sill reinforcement beam assembly, while the two outer sill connecting plates are bolted to the lower surface of the left sill reinforcement beam assembly. The left sill reinforcement beam assembly is aligned and welded to the second flange of the left sill assembly 27 via the four sill connecting plates. It is fixed to the upper front part of the left sill assembly side using fixing holes and fixing bolts.

[0181] Right door sill reinforcement beam assembly 30, such as Figure 62 As shown, the structure is a rectangular rigid frame with two reinforcing vertical ribs inside. The ends are cut at a 45° angle. Four sill connecting plates are evenly distributed on the lower surface. The two middle sill connecting plates are riveted and welded to the lower surface of the right sill reinforcing beam assembly, while the two outer sill connecting plates are bolted to the lower surface of the right sill reinforcing beam assembly. The right sill reinforcing beam assembly is aligned and welded to the second flange of the right sill assembly 28 via the four sill connecting plates. It is fixed to the upper front part of the right sill assembly side using fixing holes and fixing bolts.

[0182] (203) Rear floor assembly, such as Figure 63 and Figure 72 As shown, it includes: middle floor assembly 31, rear right sill inner panel assembly 32, rear left sill inner panel assembly 33, left rear longitudinal beam assembly 34, right rear longitudinal beam assembly 35, rear floor body assembly 36, rear floor left rear connecting plate 37, rear floor storage box assembly 38, rear floor right rear connecting plate 39, rear floor rear connecting plate 40, rear bulkhead inner panel assembly 41, rear bulkhead outer panel assembly 42, and rear bumper beam assembly 43.

[0183] For both pure electric and range-extended electric vehicles, the following components are interchangeable: right sill inner panel rear assembly 32, left sill inner panel rear assembly 33, rear floor body assembly 36, rear floor left rear connecting plate 37, rear floor rear connecting plate 40, rear bulkhead inner panel assembly 41, rear bulkhead outer panel assembly 42, and rear bumper beam assembly 43. However, the following components are interchangeable: middle floor assembly 31, left rear longitudinal beam assembly 34, right rear longitudinal beam assembly 35, rear floor storage box assembly 38, and rear floor right rear connecting plate 39.

[0184] ① Middle floor assembly 31, such as Figure 64 and Figure 65 As shown, the middle floor crossbeam assembly and the middle floor body assembly are fastened and welded together. The middle floor crossbeam assembly has a lower flange and an upper flange. The lower flange is welded to the flange 26 of the front floor rear body, and the upper flange is fastened and welded to the middle floor body assembly. Two holes on each side of the middle floor crossbeam assembly are fixed to the front flanges of the left and right rear longitudinal beam bodies respectively using drilling screws. The two sides of the middle floor body assembly are welded to and secured to the left and right rear longitudinal beam bodies respectively using drilling screws. The oblique flanges of the middle floor assembly are welded to and secured to the rear floor body assembly and the left and right rear longitudinal beam bodies respectively using drilling screws. The main difference between range-extended and pure electric systems is the increased Z-axis height of the fuel tank, which leads to an increased Z-axis height of the first flange of the middle floor assembly to match the fuel tank layout.

[0185] ②Rear assembly of the inner right door sill panel, such as Figure 66 and Figure 67As shown, the right rear longitudinal beam body is embedded and welded inside the snap-fit. The outer flange of the rear assembly of the right sill plate is welded to the inner flange of the right side panel assembly 2. A support bracket is welded to the lower surface of the rear assembly of the right sill plate.

[0186] ③ Rear assembly of the left door sill inner panel 33, such as Figure 68 and Figure 69 As shown, the left sill inner panel is embedded and welded into the snap-fit ​​inside the left rear longitudinal beam body. The outer flange of the rear assembly of the left sill inner panel is welded to the inner flange of the left side panel assembly 1. A support bracket is welded to the lower surface of the rear assembly of the left sill inner panel 33.

[0187] ④ Left rear longitudinal beam assembly 34, such as Figure 70 As shown, the outer slot of the front section of the left rear longitudinal beam body is welded and screwed to the rear assembly 33 of the left sill inner plate after being snapped together. The upper surface of the slot has mounting holes for bolting to the inner surface of the left sill inner plate rear assembly 33 with a projected weld nut. The lower slot has a sloping structure, which is more conducive to absorbing tolerances and makes it easier for the left rear longitudinal beam body and the left sill inner plate rear assembly 33 to be fastened together. The sloping surface of the lower slot of the left rear longitudinal beam body and the sloping surface of the left sill inner plate rear assembly 33 are connected by welding. The honeycomb structure inside the longitudinal beam can effectively increase strength and reduce weight and cost. At the same time, it provides mounting threaded holes on the side. The left sill inner plate rear assembly 33 is fastened to the threaded holes of the internal honeycomb structure of the left rear longitudinal beam body by bolts. The middle section of the left rear longitudinal beam has a semi-circular arc structure to avoid obstructing the left rear tire envelope and meet the clearance requirements between the vehicle and the tire under driving conditions. The internal honeycomb structure reduces weight and provides fixing points for the wheel arches. The rear section of the left rear longitudinal beam connects to the rear bumper beam assembly and supports the left rear connecting plate and rear floor storage box assembly. The difference in the left rear longitudinal beam assembly (section 34) lies at the junction of the front section of the longitudinal beam and the middle floor assembly. Because the middle floor assembly has a higher Z-axis height at this point to accommodate the range extender fuel tank, the welding flange height of the front section of the longitudinal beam differs.

[0188] ⑤ Right rear longitudinal beam assembly 35, such as Figure 71As shown, the outer slot of the front section of the right rear longitudinal beam body is welded and screwed to the rear assembly 32 of the right sill inner plate after being snapped together. The upper surface of the slot has mounting holes for connecting the projected weld nuts on the inner surface of the right sill inner plate rear assembly 32 with bolts. The lower slot has a sloping structure, which is more conducive to absorbing tolerances and makes it easier for the right rear longitudinal beam body and the rear assembly 32 of the right sill inner plate to be fastened together. The sloping surface of the lower slot of the right rear longitudinal beam body is connected to the sloping surface of the rear assembly of the right sill inner plate by welding. The honeycomb structure inside the longitudinal beam can effectively increase strength and reduce weight and cost. At the same time, it provides mounting threaded holes on the side. The rear assembly 32 of the right sill inner plate is connected and fastened to the threaded holes of the honeycomb structure inside the right rear longitudinal beam body by bolts. The middle section of the right rear longitudinal beam body has a semi-circular arc structure to avoid the right rear tire envelope and meet the clearance requirements between the vehicle and the tire under driving conditions. The internal honeycomb structure reduces weight and provides fixing points for the wheel arches. The rear section of the right rear longitudinal beam body is used to connect to the rear anti-collision beam assembly 43 and support the right rear connecting plate 39 of the rear floor and the rear floor storage box assembly 38. The difference in the right rear longitudinal beam assembly 35 is at the joint between the front section of the body longitudinal beam and the middle floor assembly. Because the Z-axis height of the middle floor assembly is higher at this point to accommodate the range extender fuel tank, the welding flange height of the front section of the body longitudinal beam is different. The middle section of the body has a semi-circular arc structure. Due to the addition of the fuel system for the range extender, the activated carbon canister assembly and the fuel filler pipe with accessories assembly are fixed here. The structure is changed to a combination of arc and vertical structure, which brings about the difference.

[0189] ⑥ Rear floor assembly 36, such as Figure 73 and Figure 74 As shown, the front bending surface overlaps and is welded to the rear bending surface of the middle floor assembly 31 and secured with drilling screws. The two sides overlap the inner flanges of the left rear longitudinal beam assembly 34 and the right rear longitudinal beam assembly 35 respectively, and are secured with welding and drilling screws. The rear end provides support and fixation for the rear floor storage box assembly 38. The rear floor body assembly 36 forms a C-ring reinforcing beam by welding the floor crossbeam body to the left connecting plate assembly of the rear floor crossbeam on the left rear longitudinal beam body and the right connecting plate assembly of the rear floor crossbeam on the right rear longitudinal beam body, thereby improving the torsional strength of the vehicle body at the rear.

[0190] ⑦ Rear floor left rear connecting plate 37, as shown Figure 75 and Figure 76 As shown, the front end bend overlaps the left rear longitudinal beam body and is connected by welding, while the side overlaps the left rear longitudinal beam body and is fastened with bolts (sharing a fastening point with the left side flange of the rear floor storage box assembly). The rear flange is welded to the rear inner panel assembly 41. The left rear connecting plate 37 of the rear floor fixes the 12V lithium battery, and there is a reinforcing groove in the middle with a wire harness through hole.

[0191] ⑧ Rear floor storage box assembly 38, such as Figure 77As shown, the front flange overlaps the upper surface of the rear floor body assembly 36 and is fastened by bolts. The two side flanges overlap the upper surfaces of the left rear connecting plate 37 and the right rear connecting plate 39 of the rear floor respectively and are fastened by bolts. The rear flange overlaps the upper surface of the rear connecting plate 40 of the rear floor and is fastened by bolts.

[0192] ⑨ Rear floor right rear connecting plate 39, as shown Figure 78 and Figure 79 As shown, the front end bend overlaps the right rear longitudinal beam body and is connected by welding, while the side overlaps the right rear longitudinal beam body and is fastened with bolts (sharing a fastening point with the right side flange of the rear floor storage box assembly). The rear flange is welded to the rear inner panel assembly 41. The subwoofer is fixed to the right rear connecting plate 39 of the rear floor and has reinforcing ribs.

[0193] ⑩ Rear floor connecting plate 40, such as Figure 80 and Figure 81 As shown, the bottom planes of both ends overlap the upper planes of the left rear connecting plate 37 and the right rear connecting plate 39 of the rear floor respectively and are fastened together by bolts. The rear end flange is welded to the overlapping joint of the rear end flanges of the left rear connecting plate 37 and the right rear connecting plate 39 of the rear floor.

[0194] Rear inner panel assembly 41, such as Figure 82 and Figure 83 As shown, the inner surface is welded to the rear end flanges of the left rear connecting plate 37, the rear connecting plate 40, and the right rear connecting plate 39 of the rear floor respectively. The left side is sandwiched between the left rear longitudinal beam assembly 34 and the rear anti-collision beam assembly 43 and is fixedly connected by bolts. The right side is sandwiched between the right rear longitudinal beam assembly 35 and the rear anti-collision beam assembly 43 and is fixedly connected by bolts.

[0195] Rear outer panel assembly 42, such as Figure 84 As shown, the upper and lower sides have two flange structures. The first flange is used to strengthen the body strength. The second flange is connected and welded to the flange of the rear inner panel assembly 41. Four rear bumper fixing brackets are welded to the surface of the middle groove to fix the rear bumper assembly. The left side of the welded body of the rear inner panel assembly 41 and the rear outer panel assembly 42 is sandwiched between the left rear longitudinal beam assembly 34 and the rear anti-collision beam assembly 43 and is fixedly connected by bolts. The right side is sandwiched between the right rear longitudinal beam assembly 35 and the rear anti-collision beam assembly 43 and is fixedly connected by bolts.

[0196] Rear bumper beam assembly 43, such as Figure 85As shown, the rear bumper beam is welded together from the left mounting plate (with welded left rear bumper mounting bracket), the right mounting plate (with welded right rear bumper mounting bracket), the upper energy-absorbing box, the lower energy-absorbing box, and the main body (with welded lower left rear bumper mounting bracket). The upper and lower energy-absorbing boxes are welded together to form a single welded body, which is then welded to the left and right mounting plates. The two welded bodies are welded to both sides of the internal plane of the main body. The upper and lower energy-absorbing boxes have waist-shaped holes and round holes on their upper and lower surfaces, which can deform and absorb energy when compressed from the rear.

[0197] (3) For outer coverings, such as Figure 86 , Figure 87 , Figure 88 and Figure 89 As shown, it includes a front windshield 44, a panoramic sunroof 45, a plastic tailgate assembly 46, a rear windshield 47, a left front door sheet metal assembly 48, a left front side door glass assembly 49, a left rear door sheet metal assembly 50, a left rear side door glass assembly 51, a right front door sheet metal assembly 52, a right front side door glass assembly 53, a right rear door sheet metal assembly 54, and a left rear side door glass assembly 55.

[0198] For pure electric and range-extended vehicles, the following components are universal: front windshield 44, panoramic sunroof 45, plastic tailgate assembly 46, rear windshield 47, left front door sheet metal assembly 48, left front side door glass assembly 49, left rear door sheet metal assembly 50, left rear side door glass assembly 51, right front door sheet metal assembly 52, right front side door glass assembly 53, right rear door sheet metal assembly 54, and left rear side door glass assembly 55.

[0199] ① The lower edge of the windshield glass 44 is pressed onto the outer edge of the sheet metal of the lower crossbeam assembly 18. The two sides of the windshield glass are pressed onto the inner edges of the A-pillar sheet metal of the left side assembly 1 and the right side assembly 2, respectively. The upper edge of the windshield glass is pressed onto the upper front surface of the welding cavity (the inner plate of the front top crossbeam and the front top crossbeam assembly are formed by pressing and welding). After the glass is fastened to the above surfaces, it is fixed with adhesive. Since the above mating boundaries are completely consistent, the windshield glass can be used as a universal part.

[0200] ② The panoramic sunroof glass 45, with adhesive strips on all four sides, is pressed onto the upper rear surface of the welding cavity (the inner panel of the front top beam and the front top beam assembly are formed by pressing and welding to form the welding cavity), the inner sheet metal flange of the left side assembly 1 from the A pillar to the C pillar, the inner sheet metal flange of the right side assembly 2 from the A pillar to the C pillar, and the rear part is pressed onto the upper surface of the welding cavity (the inner panel of the rear top beam assembly and the rear top beam are formed by pressing and welding to form the welding cavity). Because the above mating boundaries are completely consistent, the panoramic sunroof glass can be made into a universal part.

[0201] ③ The plastic tailgate assembly 46 has a rubber strip on the top that fits into the welded cavity (the rear top crossbeam assembly and the inner plate of the rear top crossbeam are formed by pressing and welding to form the welded cavity). The rubber strip on the left side fits into the welded body parts of the left side assembly 1 (the left rear water channel body and the left rear taillight mounting plate assembly). The rubber strip on the right side fits into the welded body parts of the right side assembly 2 (the right rear water channel body and the right rear taillight mounting plate assembly). Because the above fit boundaries are completely consistent, the plastic tailgate assembly can be used as a universal part.

[0202] ④ The rear windshield 47 is pressed onto the inner flange of the plastic tailgate assembly 46 with rubber strips around its perimeter. Since the above-mentioned mating boundaries are completely consistent, the rear windshield can be used as a universal part.

[0203] ⑤ The left front door sheet metal assembly 48 is a universal part because it is compatible with the left side panel assembly 1 and the mating boundary is completely consistent.

[0204] ⑥ The left front door glass assembly 49 is a universal part because it is compatible with the left front door sheet metal assembly 48 and the left side panel assembly 1, and the mating boundary is completely consistent.

[0205] ⑦ The left rear door sheet metal assembly 50 is a universal part because it is compatible with the left side panel assembly 1 and the mating boundary is completely consistent.

[0206] ⑧ The left rear door glass assembly 51 can be made into a universal part because it is compatible with the left rear door sheet metal assembly 50 and the left side panel assembly 1, and the mating boundary is completely consistent.

[0207] ⑨ The right front door sheet metal assembly 52 can be made into a universal part because it matches the right side panel assembly 2 and the matching boundary is completely consistent.

[0208] ⑩ The right front door glass assembly 53 can be made into a universal part because it is compatible with the right front door sheet metal assembly 52 and the right side panel assembly 2, and the mating boundary is completely consistent.

[0209] The right rear door sheet metal assembly 54 can be made into a universal part because it is compatible with the right side panel assembly 2 and the mating boundary is completely consistent.

[0210] The right rear door glass assembly 55 can be made into a universal part because it is compatible with the right rear door sheet metal assembly 54 and the right side panel assembly 2, and the mating boundary is completely consistent.

[0211] This embodiment provides a vehicle body assembly that can be used for both pure electric and range-extended vehicles. It can be matched with two different power systems, range-extended and pure electric, and the upper body structure can be shared through the generalized lower body structure, thereby enabling the sharing of upper body exterior coverings.

[0212] This embodiment provides a vehicle body assembly shared by pure electric and range-extended vehicles. It shares the left and right front vertical panel assemblies and the lower windshield crossbeam assembly in the engine compartment; the front seat front crossbeam assembly, front floor sill assembly, left sill assembly, right sill assembly, left sill reinforcement beam assembly, and right sill reinforcement beam assembly in the front floor assembly; and the left sill inner panel rear assembly 33, right sill inner panel rear assembly 32, rear floor body assembly 36, rear bulkhead inner panel assembly 41, rear bulkhead outer panel assembly 42, rear anti-collision beam assembly 43, rear floor left rear connecting plate 37, and rear floor rear connecting plate 40 in the rear floor assembly. In summary, the shared components of the lower vehicle body achieve the sharing of the left side bulkhead assembly, right side bulkhead assembly, and roof system of the upper vehicle body, and the shared components of the upper vehicle body achieve the sharing of the outer covering components.

[0213] Example 2

[0214] Embodiment 2 of the present invention provides a pure electric vehicle.

[0215] This embodiment provides a pure electric vehicle, such as Figure 90 As shown, a vehicle body assembly shared by pure electric and range-extended vehicles as described in Embodiment 1 is used.

[0216] Example 3

[0217] Embodiment 3 of the present invention provides a range-extended vehicle.

[0218] This embodiment provides a range-extended vehicle, such as... Figure 91 As shown, a vehicle body assembly shared by pure electric and range-extended vehicles as described in Embodiment 1 is used.

[0219] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A vehicle body assembly shared by pure electric and range-extended vehicles, characterized in that: This includes the front seat crossbeam assembly, the left sill assembly, the right sill assembly, and the front floor sill assembly; The front crossbeam assembly of the front seat adopts a C-shaped groove with a flange structure. It is fastened to the front floor body and welded. The front end face is spliced ​​and welded to the front longitudinal beam cover plate, the front baffle and the central channel connecting plate. The left and right sill assemblies are composed of a sill connecting plate and a sill inner plate body through nested pressing and welding; the sill connecting plate has a flanged structure and is butt-welded to the left or right side sill assembly; the sill inner plate body has a C-shaped groove and multiple holes on its lower surface to weld multiple battery pack mounting reinforcement plate assemblies. The front floor sill assembly has Z-shaped upward 90° bends on both sides, and the two end faces are welded to the left front vertical plate assembly, the right front vertical plate assembly, the left sill assembly and the right sill assembly in sequence.

2. The vehicle body assembly shared by pure electric and range-extended vehicles as described in claim 1, characterized in that: It also includes the left sill reinforcement beam assembly and the right sill reinforcement beam assembly; Multiple sill connecting plates are evenly distributed on the lower surfaces of the left and right sill reinforcement beam assemblies, and are aligned and welded with the flanges of the left or right sill assembly.

3. The vehicle body assembly shared by pure electric and range-extended vehicles as described in claim 1, characterized in that: The upper surface of the front floor sill assembly is welded from front to back with two front longitudinal beam cover plates, a front baffle and a central channel connecting plate, a front seat front crossbeam assembly, four battery front central mounting brackets, an airbag ECU mounting plate and a front seat rear crossbeam assembly. The front end face of the front floor sill assembly overlaps and is riveted and welded to the lower part of the front baffle body, and the rear end face overlaps and is riveted and welded to the rear body of the front floor.

4. The vehicle body assembly shared by pure electric and range-extended vehicles as described in claim 1, characterized in that: It also includes the left front vertical panel assembly, the right front vertical panel assembly, and the front windshield lower crossbeam assembly; The lower end face of the front windshield lower crossbeam assembly is welded to the upper part of the front baffle body in the X direction. The inner side of the left front vertical plate assembly is welded to the front windshield lower crossbeam assembly, the upper part of the front fender body, the lower part of the front fender body, and the front fender left support plate assembly from top to bottom. The outer side of the left front vertical plate assembly is welded to the left front wheel arch assembly, the left sill assembly, and the left side panel assembly from top to bottom. The left front vertical plate assembly uses an inward flange structure on the top surface to perform XZ plane normal pressure welding with the front windshield lower crossbeam assembly, and uses an outward flange structure on the side surface to perform positive Y direction fastening welding with the left side panel assembly. The inner side of the right front vertical plate assembly is welded to the front windshield lower crossbeam assembly, the upper part of the front fender body, the lower part of the front fender body, and the front fender right support plate assembly from top to bottom. The outer side of the right front vertical plate assembly is welded to the right front wheel arch assembly, the right sill assembly, and the right side panel assembly from top to bottom. The right front vertical plate assembly uses an inward flange structure on the top surface to perform XZ plane normal pressure welding with the front windshield lower crossbeam assembly, and uses an outward flange structure on the side surface to perform positive Y direction fastening welding with the right side panel assembly.

5. The vehicle body assembly shared by pure electric and range-extended vehicles as described in claim 1, characterized in that: The upper cover plate of the front longitudinal beam adopts a bent V-angle design, with the bending angle being the same as that of the lower part of the front baffle body, so as to be welded to the lower part of the front baffle body. The plane of the upper cover plate of the front longitudinal beam is welded to the front floor body. The upper cover plate of the front longitudinal beam, the lower part of the front baffle body, and the front floor body are welded to form an integral structure. The Y-direction welding positions of the upper cover plate of the front longitudinal beam on both sides are aligned with the Y-direction of the right front longitudinal beam assembly and the left front longitudinal beam assembly, respectively.

6. The vehicle body assembly shared by pure electric and range-extended vehicles as described in claim 1, characterized in that: It also includes the rear assembly of the right sill inner panel and the rear assembly of the left sill inner panel; The outer flange of the rear part of the right sill inner panel assembly is welded to the inner flange of the right side panel assembly. The outer flange of the rear part of the left sill inner panel assembly is welded to the inner flange of the left side panel assembly.

7. A vehicle body assembly shared by pure electric and range-extended vehicles as described in claim 1, characterized in that: It also includes the rear floor assembly; The front bending surface of the rear floor body assembly overlaps and is welded to the rear bending surface of the middle floor assembly. The two sides overlap the inner flanges of the left and right rear longitudinal beam assemblies respectively and are fastened by welding and drilling screws. The rear end provides support and fixation for the rear floor storage box assembly.

8. The vehicle body assembly shared by pure electric and range-extended vehicles as described in claim 1, characterized in that: It also includes the left rear connecting plate of the rear floor, the rear inner panel assembly, and the rear outer panel assembly; The front end of the left rear connecting plate of the rear floor is bent and overlapped with the left rear longitudinal beam body and connected by welding. The side overlapped with the left rear longitudinal beam body and fastened by bolts. The rear end is welded to the rear inner panel assembly. The inner surface of the rear inner panel assembly is respectively welded to the rear end flanges of the left rear connecting plate of the rear floor, the rear connecting plate of the rear floor, and the right rear connecting plate of the rear floor. The rear outer panel assembly has two flange structures on the upper and lower sides. The first flange is used to strengthen the body strength. The second flange is connected to and welded to the flange of the rear inner panel assembly. After welding the surface of the middle groove, a fixing bracket is installed to fix the rear bumper assembly. The left side of the welded body of the rear inner panel assembly and the rear outer panel assembly is sandwiched between the left rear longitudinal beam assembly and the rear anti-collision beam assembly and is fixedly connected by bolts, while the right side is sandwiched between the right rear longitudinal beam assembly and the rear anti-collision beam assembly and is fixedly connected by bolts.

9. A pure electric vehicle, characterized in that: The vehicle body assembly described in any one of claims 1-8 is used for both pure electric and range-extended vehicles.

10. A range-extended vehicle, characterized in that: The vehicle body assembly described in any one of claims 1-8 is used for both pure electric and range-extended vehicles.

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