Vehicle body and vehicle

Abstract

The application provides a vehicle body and a vehicle, the vehicle body of the application comprises a lower body, a battery pack connected to the bottom of the lower body, the lower body has a rear floor lower cross beam, two side sill beams arranged on two sides, and a torsion box connected to the rear end of a front engine compartment longitudinal beam; an engine compartment rear section cross beam is arranged between the two torsion boxes, and the rear floor lower cross beam, the engine compartment rear section cross beam, and the two side sill beams and the torsion boxes are connected to form a ring structure; the battery pack is arranged in the ring structure, mounting lugs are arranged on the left and right sides of the battery pack, each side mounting lug is connected to the side sill beam, and the two side mounting lugs form side crash energy absorption structures on the left and right sides of the battery pack. The vehicle body of the application can strengthen the vehicle body by using the formed ring structure, avoid deformation of the battery pack caused by extrusion when the battery pack collides, and also can slow down the impact on the battery pack by using the collapse energy absorption of the mounting lugs when a side crash occurs, thereby improving the safety of the battery pack.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle body structure, in particular to a vehicle body of a vehicle. BACKGROUND

[0002] At present, new energy vehicles mainly in the form of pure electric and hybrid are gradually becoming the mainstream of the automobile market. In existing new energy vehicles, a battery pack with a certain capacity is generally arranged in the vehicle body, and the battery pack in most vehicles is arranged below the front floor of the vehicle body to better utilize the vehicle body space and avoid affecting the arrangement of other vehicle body components. With people's increasing concern about the safety of new energy vehicles, the crash safety of the battery pack has become an important indicator for measuring the safety of the whole vehicle. However, the existing new energy vehicles still have deficiencies in the crash protection design of the battery pack, and further improvement is needed to improve the safety of the battery pack. SUMMARY

[0003] Therefore, the present application aims to provide a vehicle body to improve the safety of the battery pack.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0005] A vehicle body of a vehicle, comprising a lower vehicle body, and a battery pack connected to the bottom of the lower vehicle body;

[0006] The lower vehicle body has a rear floor lower cross beam located at the bottom of a rear floor assembly, a rocker beam arranged on the left and right sides, and a torsion box connected to the rear end of the front engine compartment longitudinal beam on the left and right sides;

[0007] A rear engine compartment section cross beam is arranged between the two torsion boxes, and the rear floor lower cross beam, the rear engine compartment section cross beam, and the rocker beam and the torsion box on the left and right sides form a ring structure;

[0008] The battery pack (12) is arranged in the ring structure, and mounting lugs are arranged on the left and right sides of the battery pack, each side mounting lug is connected to the same side rocker beam, and the mounting lugs on the left and right sides can collapse in the left and right directions of the whole vehicle to form a side crash energy absorption structure on the left and right sides of the battery pack.

[0009] Further, the rear floor assembly has a rear floor framework and a rear floor panel covering the rear floor framework; the rear floor framework has rear floor longitudinal beams arranged on the left and right sides, and a rear floor middle cross beam connected between the rear floor longitudinal beams on the left and right sides;

[0010] The rear floor longitudinal beams are connected with the side sill beams, the rear floor lower cross beams are in a "C" shape with the front open, and the rear floor lower cross beams are connected between the front sections of the rear floor longitudinal beams and the rear floor middle cross beams.

[0011] Further, the rear floor framework also has a rear floor front cross beam and a rear floor rear cross beam.

[0012] The rear floor front cross beam is connected between the front sections of the rear floor longitudinal beams, the rear floor rear cross beam is connected between the rear sections of the rear floor longitudinal beams, and the rear floor middle cross beam is connected between the transition regions of the front sections and the rear sections of the rear floor longitudinal beams.

[0013] The rear floor front cross beam, the rear floor middle cross beam, and the rear floor longitudinal beams form a ring structure, and the rear floor rear cross beam, the rear floor middle cross beam, and the rear floor longitudinal beams form a ring structure.

[0014] Further, the rear ends of the side sill beams each have a rear sill beam, and the rear sill beam is connected with the rear floor longitudinal beam.

[0015] A longitudinal beam front section cavity is formed between the front section, the rear sill beam, and the rear floor panel on each side, and a lower cross beam side cavity is formed between the front section, the rear sill beam, and the rear floor lower cross beam on each side.

[0016] Further, a middle cross beam cavity is formed between the rear floor middle cross beam and the rear floor panel, and a lower cross beam middle cavity is formed between the rear floor lower cross beam and the rear floor middle cross beam.

[0017] Further, each side of the side sill beam facing the interior of the vehicle is provided with a reinforcing plate extending in the front-rear direction of the vehicle, the front end of each side of the reinforcing plate is connected with the front cabin longitudinal beam on the same side through the front wall longitudinal beam, and the rear end of each side of the reinforcing plate is connected with the rear floor longitudinal beam on the same side.

[0018] Each side of the reinforcing plate is overlapped on the same side of the side sill beam on one side, and is connected with the front floor panel on the other side, and a reinforcing plate cavity is formed between the side sill beam, the front floor panel, and the reinforcing plate.

[0019] Further, a front row seat mounting cross beam is connected between the side sill beams, and the left and right ends of the front row seat mounting cross beam are connected with the side sill beams through the reinforcing plates.

[0020] Further, the front-row seat mounting cross beam is integrally formed by a rolling process, and the front-row seat mounting cross beam has a plurality of cross beam bodies connected in sequence along the front-rear direction of the whole vehicle, and the cross section of each cross beam body is in the shape of a Chinese character 'jia' ().

[0021] The front-row seat mounting cross beam is provided with a seat mounting bracket, and the front-row seat mounting cross beam is provided with the seat mounting bracket at the position where the front-row seat mounting cross beam intersects with the two side reinforcing plates.

[0022] Further, the two side rocker beams are each provided with a nut plate, and each side mounting lug has a first part connected with the battery pack and a second part connected to the outside of the first part.

[0023] In the left-right direction of the whole vehicle, each side second part is downwardly inclined in the direction pointing to the outside of the vehicle, and each side rocker beam is adapted to the same side second part and abuts on the same side second part.

[0024] Each side second part is connected to the same side nut plate through a connecting bolt penetrating through the same side second part.

[0025] Further, in the left-right direction of the whole vehicle, the first part is upwardly inclined in the direction pointing to the outside of the vehicle; and / or,

[0026] The mounting lug has a plurality of plate bodies spaced apart in the up-down direction of the whole vehicle, each plate body is extended from the second part to the first part and connected with the battery pack.

[0027] Further, the side of the battery pack has a side beam, the mounting lug is connected to the side beam, and the mounting lug and the side beam are integrally extruded; and / or,

[0028] In the direction pointing to the second part, the thickness of the first part in the up-down direction of the whole vehicle gradually decreases, and in the direction pointing to the first part, the thickness of the second part in the up-down direction of the whole vehicle gradually increases.

[0029] Further, the nut plate has a bottom plate and a welding nut arranged on the bottom plate, and the rocker beam is provided with a mounting via hole corresponding to the arrangement of the nut hole of the welding nut;

[0030] The mounting via hole is an elongated hole extending in the left-right direction of the whole vehicle, the bottom plate is connected with a collapse plate through a deformable connecting part, and the welding nut is connected to the collapse plate; when the connecting part is deformed, the welding nut can move relative to the bottom plate in the length direction of the mounting via hole.

[0031] Further, the bottom plate is provided with a through hole, and the collapse plate is located in the through hole.

[0032] The collapse plate is located at two ends of the mounting via length direction, one end of which is connected to the bottom plate through the connecting part, and the other end forms a crush deformation space with the inner wall of the through hole.

[0033] Further, one side of the through hole forms an opening extending to the outside of the bottom plate, and the connecting part is located at the opening and is arranged opposite to two;

[0034] Each connecting part is connected to the bottom plate through a connecting arm, and in the front-rear direction of the whole vehicle, there is a gap between the front and rear sides of the collapse plate and the inner wall of the through hole, and the gaps on both sides are communicated with the crush deformation space.

[0035] Compared with the prior art, the present application has the following advantages:

[0036] The vehicle body of the present application forms a ring structure by connecting the rear floor lower cross beam, the rear cabin section cross beam, and the door sill beams and the torsion boxes on both sides, and enables the mounting lugs to collapse in the left-right direction of the whole vehicle, thereby forming a side impact energy absorption structure on both sides of the battery pack, which not only strengthens the vehicle body by forming a ring structure, improves the structural strength and torsional stiffness of the bottom of the vehicle body, and avoids deformation of the battery pack due to extrusion during a collision, but also absorbs energy by collapsing the mounting lugs during a side impact, thereby reducing the impact on the battery pack, thereby improving the safety of the battery pack.

[0037] In addition, the rear floor lower cross beam is connected between the front section of the rear floor longitudinal beam on both sides and the rear floor middle cross beam, which can increase the strength and stiffness of the front part of the rear floor assembly, improve the stability of the rear end of the battery pack, and also increase the structural strength of the rear floor framework, thereby improving the torsional stiffness of the whole rear floor assembly. By arranging the rear floor front cross beam and the rear floor rear cross beam, and connecting the rear floor front cross beam, the rear floor middle cross beam, and the rear floor longitudinal beams on both sides to form a ring structure, and connecting the rear floor rear cross beam, the rear floor middle cross beam, and the rear floor longitudinal beams on both sides to form a ring structure, the double ring structure can better improve the stiffness of the rear floor framework.

[0038] By forming the longitudinally arranged longitudinal beam front section cavity and the lower cross beam side cavity in a stacked manner, the double cavity structure can be used to increase the structural strength of the front part of the rear floor assembly. By forming the middle cross beam cavity and the lower cross beam middle cavity in a stacked manner, the double cavity structure can also be used to increase the structural strength of the front part of the rear floor assembly, and can also cooperate with the double cavity structure on both sides to improve the dynamic stiffness of the front mounting point of the rear subframe and improve the crash performance of the rear part of the vehicle body.

[0039] Secondly, by setting a reinforcing plate in the inner side of the threshold beam, and forming a cavity between the threshold beam, the reinforcing plate and the front floor panel, the structural strength of the threshold beam position can be increased by the increased reinforcing plate, especially the cavity structure with high strength, thereby improving the overall structural strength of the middle part of the vehicle body, and helping to improve the collision response capability of the vehicle.

[0040] The front seat installation cross beam is formed by rolling process, and the front seat installation cross beam is composed of multiple cross beam bodies with a few-shaped cross section, which can increase the structural strength of the front seat installation cross beam itself, help to improve the stability of the front seat, and also help to improve the torsional stiffness of the middle part of the vehicle body and the collision force transmission effect of the front seat installation cross beam. The seat installation bracket is arranged at the position where the front seat installation cross beam intersects with the reinforcing plate, which can form a side crash stop wall position by the reinforcing effect of the seat installation bracket, so that the part outside the stop wall position can be fully collapsed to absorb energy, and the safety of the battery pack inside is improved.

[0041] Furthermore, the mounting lug has a first part and a second part connected thereto, and the second part is downwardly inclined, and the threshold beam is adapted to the second part, which can utilize the inclined design of the second part to make the mounting lug fully crushed during side impact to form a side impact energy absorption structure, and also can make the battery pack slide downward to avoid the battery pack being squeezed by the vehicle body structure during side impact. The first part is upwardly inclined, which can cooperate with the downward inclination of the second part to make the mounting lug have better crushing and energy absorption effect. The mounting lug has multiple plate bodies arranged in an upper and lower interval, and each plate body extends to the battery pack, which can form a force transmission channel along the Y direction of the vehicle, helping to disperse the collision force to the battery pack frame, so as to reduce the impact damage caused by crushing and energy absorption.

[0042] The mounting lug and the side beam of the battery pack are integrally extruded, which can facilitate the preparation of the mounting lug and the connection between the mounting lug and the battery pack, and also can ensure the structural strength of the mounting lug itself and the connection strength between the mounting lug and the battery pack. The first part gradually decreases in thickness in the direction pointing to the second part, and the second part gradually increases in thickness in the direction pointing to the first part, which is conducive to the bending of the mounting lug during side impact to better realize crushing and energy absorption. The nut plate is composed of a bottom plate and a welded nut, so that the mounting through hole is arranged in a long strip shape along the left and right directions of the vehicle, and the welded nut can move relative to the bottom plate along the length direction of the mounting through hole, which can realize the crushing displacement of the battery pack mounting point during side impact, and help to reduce the collision impact on the battery pack and improve the safety of the battery pack.

[0043] In addition, the collapse plate is arranged in the through hole on the bottom plate, and one end of the collapse plate is connected to the bottom plate through the connecting part, and the other end forms a crushing deformation space, which is helpful to simplify the structure of the nut plate, and can limit the movement distance of the welding nut, and can ensure the use effect of the nut plate when crushing. The connecting part is arranged at the opening, which can ensure the reliability of the connection between the collapse plate and the bottom plate. By arranging the connecting arm, the gap between the front and rear sides of the collapse plate and the inner wall of the through hole is formed, which not only facilitates the Y-direction movement of the collapse plate, but also has a certain movement ability in the X-direction, which helps to improve the safety of the battery pack in the front collision or rear collision.

[0044] Another object of the present application is to provide a vehicle having a vehicle body as described above.

[0045] The vehicle described in the present application has the same advantages as the vehicle body described above, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0046] The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the application, and are incorporated herein for explanation. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0047] Figure 1 The structure of the vehicle body described in the embodiment of the present application is shown in the schematic diagram;

[0048] Figure 2 The structure of the vehicle body described in the embodiment of the present application is shown in the schematic diagram; Figure 1 The structure of the vehicle body described in the embodiment of the present application is shown in the schematic diagram;

[0049] Figure 3 The structure of the vehicle body described in the embodiment of the present application is shown in the schematic diagram;

[0050] Figure 4 The structure of the vehicle body described in the embodiment of the present application is shown in the schematic diagram;

[0051] Figure 5 The structure of the vehicle body described in the embodiment of the present application is shown in the schematic diagram; Figure 4 The structure of the vehicle body described in the embodiment of the present application is shown in the schematic diagram;

[0052] Figure 6 The structure of the vehicle body described in the embodiment of the present application is shown in the schematic diagram;

[0053] Figure 7 The structure of the vehicle body described in the embodiment of the present application is shown in the schematic diagram; Figure 6 The structure of the vehicle body described in the embodiment of the present application is shown in the schematic diagram;

[0054] Figure 8 The structure of the vehicle body described in the embodiment of the present application is shown in the schematic diagram;

[0055] Figure 9 A schematic view of the structure of the front section of the longitudinal beam and the side section of the lower cross beam according to an embodiment of the present application;

[0056] Figure 10 A schematic view of the structure of the middle cross beam and the middle section of the lower cross beam according to an embodiment of the present application;

[0057] Figure 11 A schematic view of the structure of the reinforcing plate according to an embodiment of the present application;

[0058] Figure 12 A schematic view of the structure of the front seat mounting cross beam, reinforcing plate, and seat mounting bracket according to an embodiment of the present application;

[0059] Figure 13 A schematic view of the structure of the front seat mounting cross beam according to an embodiment of the present application;

[0060] Figure 14 A schematic view of the structure of the battery pack according to an embodiment of the present application;

[0061] Figure 15 A schematic view of the structure of the battery pack according to an embodiment of the present application; Figure 14 A cross-sectional view of the middle A-A position;

[0062] Figure 16 A schematic view of the structure of the mounting lug according to an embodiment of the present application;

[0063] Figure 17 A schematic view of the structure of the mounting lug according to an embodiment of the present application; Figure 16 A cross-sectional view of the middle B-B position;

[0064] Figure 18 A schematic view of the structure of the mounting lug and side beam according to an embodiment of the present application;

[0065] Figure 19 A schematic view of the structure of the nut plate according to an embodiment of the present application;

[0066] Figure 20 A schematic view of the structure of the nut plate according to an embodiment of the present application; Figure 19 An enlarged view of the middle C portion;

[0067] Figure 21 A schematic view of the structure of the nut plate according to an embodiment of the present application;

[0068] Figure 22 A schematic view of the structure of the nut plate according to an embodiment of the present application;

[0069] Figure 23 A schematic view of the structure of the nut plate according to an embodiment of the present application;

[0070] Explanation of reference numerals:

[0071] 1000, lower vehicle body;

[0072] 1 rear floor assembly; 2 rocker; 3 front floor panel; 4 front engine bay rail; 5 front seat mounting cross beam; 6 rear floor lower cross beam; 7 torque box; 8 engine bay rear section cross beam; 9 reinforcement plate; 10 front bulkhead; 11 center tunnel; 12 battery pack; 13 mounting lug; 14 nut plate; 15 mounting sleeve; 16 connecting bolt;

[0073] 100 rear floor skeleton; 200 rear floor panel; 300 rear floor front cross beam reinforcement plate; 200a rail cover plate; 101 rear floor rail; 101a front section; 101b rear section; 102 rear floor center cross beam; 103 rear floor front cross beam; 104 rear floor rear cross beam; 2a rear rocker; 201 mounting via; 501 seat mounting bracket; 5a cross beam main body; 6a lower cross beam side part; 6b lower cross beam middle part;

[0074] 1201 side beam; 1201a first reinforcing rib; 1201b second reinforcing rib; 1301 first part; 1302 second part; 13a plate body; 13b reinforcing rib; 1401 bottom plate; 1401a crush plate; 1401b connecting part; 1401c through hole; 1401d connecting arm; 1402 welding nut; 1402a nut hole;

[0075] e gap; t crush deformation zone; M rail front section cavity; N lower cross beam side part cavity; S center cross beam cavity; T lower cross beam middle part cavity; K opening; Q lug cavity; W reinforcement plate cavity. DETAILED DESCRIPTION

[0076] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0077] In the description of the present application, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer" and the like appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the present application in indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. Therefore, it cannot be understood as a limitation of the present application. In addition, if the terms "first", "second" and the like appear, they are also only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0078] Furthermore, in the description of the present application, unless otherwise explicitly defined, the connecting relationship between the components can be achieved by using the conventional connecting means in the art. Moreover, the terms "mounting", "connecting", "connection" and "connected" should be interpreted in a broad sense. For example, they can mean fixed connection, detachable connection, or integral connection; they can mean mechanical connection, electrical connection; they can mean direct connection, or indirect connection via an intermediate medium; they can mean internal communication between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood in conjunction with the specific circumstances.

[0079] The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0080] Embodiment One

[0081] This embodiment relates to a vehicle body of a vehicle, which, as shown in Figures 1 to 3 the overall structure, comprises a lower vehicle body 1000, and a battery pack 12 connected at the bottom of the lower vehicle body 1000.

[0082] Among them, the lower vehicle body 1000 has a rear floor lower cross beam 6 located at the bottom of the rear floor assembly 1, a rocker beam 2 arranged on the left and right sides, and a torsion box 7 connected at the rear end of the front engine compartment longitudinal beam 4 on the left and right sides. Moreover, an engine compartment rear section cross beam 8 is arranged between the two torsion boxes 7, and the rear floor lower cross beam 6, the engine compartment rear section cross beam 8, and the rocker beams 2 and the torsion boxes 7 on the left and right sides are also connected to form a ring structure.

[0083] In addition, the battery pack 12 is arranged in the ring structure, and mounting lugs 13 are arranged on the left and right sides of the battery pack 12, each side mounting lug 13 is connected with the same side rocker beam 2, and the mounting lugs 13 on the left and right sides can collapse in the left and right directions of the whole vehicle, thereby forming a side impact energy absorption structure on the left and right sides of the battery pack 12.

[0084] The above structure, by connecting the rear floor lower cross beam 6, the engine compartment rear section cross beam 8, and the rocker beams 2 and the torsion boxes 7 on the left and right sides to form a ring structure, and by arranging the mounting lugs 13 on the sides of the battery pack 12 to collapse in the left and right directions of the whole vehicle, thereby forming a side impact energy absorption structure on the left and right sides of the battery pack 12, this embodiment not only can utilize the formed ring structure to strengthen the vehicle body, improve the structural strength and torsional stiffness of the bottom of the vehicle body, avoid the battery pack 12 from being extruded and deformed when colliding, but also can utilize the collapse of the mounting lugs 13 to absorb energy when a side impact occurs, thereby reducing the impact on the battery pack 12, so as to achieve the effect of improving the safety of the battery pack 12.

[0085] Based on the overall introduction as above, specifically, still by Figure 3As shown, in the embodiment, the torsion boxes 7 on both sides are in a "person" shape structure, the front end of each torsion box 7 is connected with the bottom of the rear end of the front cabin longitudinal beam 4, one side of the rear end of each torsion box 7 is connected with the front end of the rocker beam 2, and the other side is connected with the cabin rear section cross beam 8. In specific implementation, the above-mentioned torsion box 7 can adopt the conventional structure in the existing vehicle model, and is usually connected with the front cabin longitudinal beam 4, the rocker beam 2 and the cabin rear section cross beam 8 by welding.

[0086] The above-mentioned cabin rear section cross beam 8 is specifically connected to the front end of the front floor panel 3 and located at the bottom of the front floor panel 3, and the cabin rear section cross beam 8 also spans the middle channel 11 at the bottom to realize the connection between the torsion boxes 7 on both sides. In specific implementation, the cabin rear section cross beam 8 of the embodiment can adopt the common beam structure in the existing vehicle model, and can be a sheet metal welding structure or can also be made of extruded aluminum.

[0087] Continuing to be shown in Figures 4 to 7 As a preferred implementation form, the rear floor assembly 1 of the embodiment has a rear floor framework 100 and a rear floor panel 200 covering above the rear floor framework 100.

[0088] The rear floor framework 100 has rear floor longitudinal beams 101 arranged on both sides, and a rear floor middle cross beam 102 connected between the rear floor longitudinal beams 101 on both sides. Each side rear floor longitudinal beam 101 is connected with the rear end of the same side rocker beam 2, and the rear floor lower cross beam 6 is connected between the front section 101a of the rear floor longitudinal beams 101 on both sides and the rear floor middle cross beam 102.

[0089] At this time, by connecting the rear floor lower cross beam 6 between the front section 101a of the rear floor longitudinal beams 101 on both sides and the rear floor middle cross beam 102, the strength and rigidity of the front part of the rear floor assembly 1 can be increased, the stability of the battery pack rear end or the fuel tank installation in the vehicle body can be improved, and the structural strength of the rear floor framework 100 can also be increased, thereby helping to improve the torsional rigidity of the whole rear floor assembly 1.

[0090] It should be noted that in the embodiment, the rear floor framework 100 can adopt a conventional sheet metal welding structure, but as a preferred implementation form, the rear floor framework 100 can also be integrally formed and specifically prepared by an integral thermoforming process. In this way, the molding of the rear floor framework 100 can be facilitated, the number of parts and the welding process can be reduced, and the structural strength of the rear floor framework 100 can also be ensured.

[0091] The integral hot forming is a forming process often used in the existing vehicle body manufacturing, which generally includes heating the steel plate to make it uniform austenite, then stamping into the mold with a cooling system inside, and finally transforming the austenite into martensite through cooling to complete the forming process. Through the above forming process, the prepared vehicle body part can be hardened, thereby greatly improving its strength.

[0092] In particular, in the specific implementation, the laser welding hot forming process is preferably used, that is, before the hot stamping forming process, different materials, thicknesses and coatings of the plate are spliced and welded into an integral plate by laser welding technology. Then, the integral plate is subjected to hot stamping forming to prepare the rear floor framework 100. The laser welding can solve the problem of ultra-wide plate and the requirement of different parts of the rear floor framework 100 for process performance, and has good effects in terms of vehicle body weight reduction, reduction of vehicle cost, energy saving and environmental protection, etc.

[0093] In this embodiment, as a preferred implementation form, the rear floor framework 100 also has a rear floor front cross beam 103. The rear floor front cross beam 103 is connected between the front segments 101a of the two side rear floor longitudinal beams 101, and the rear floor front cross beam 103, the rear floor middle cross beam 102 and the two side rear floor longitudinal beams 101 are connected to form a ring structure. At this time, the rear floor front cross beam 103 is arranged, and the rear floor front cross beam 103, the rear floor middle cross beam 102 and the two side rear floor longitudinal beams 101 are connected to form a ring structure, which can further improve the structural strength of the rear floor framework 100 by utilizing the high strength of the ring structure.

[0094] In addition to the rear floor front cross beam 103, in this embodiment, the rear floor framework 100 also has a rear floor rear cross beam 104. The rear floor rear cross beam 104 is connected between the rear segments 101b of the two side rear floor longitudinal beams 101, and the rear floor middle cross beam 102 is also specifically connected between the transition areas of the front segments 101a and the rear segments 101b of the side rear floor longitudinal beams 101, so that the rear floor front cross beam 103 and the rear floor rear cross beam 104 are arranged on the front and rear sides of the rear floor middle cross beam 102.

[0095] Similar to the rear floor front cross beam 103, in this embodiment, the rear floor rear cross beam 104, the rear floor middle cross beam 102 and the two side rear floor longitudinal beams 101 are also connected to form a ring structure. In this way, by arranging the rear floor rear cross beam 104 and connecting the rear floor rear cross beam 104, the rear floor middle cross beam 102 and the two side rear floor longitudinal beams 101 to form a ring structure, the stiffness of the rear floor framework 100 can be further improved by utilizing the double ring structure on the basis of the ring structure formed by the rear floor front cross beam 103.

[0096] In addition, based on the covering of the rear floor panel 200 on the rear floor framework 100, generally, the left and right sides of the rear floor panel 200 will have a longitudinal beam cover plate 200a covering the top of the rear floor longitudinal beam 101, and through the covering of the top of the rear floor longitudinal beam 101 by the longitudinal beam cover plate 200a, a longitudinal beam cavity can be formed in the rear floor longitudinal beam 101, so as to utilize the cavity structure with great strength to ensure the overall structural strength of the rear floor longitudinal beam 101.

[0097] Of course, in addition to forming the longitudinal beam cavity, based on the covering of the rear floor panel 200, a cross beam cavity can also be formed at the rear floor middle cross beam 102 and the rear floor rear cross beam 104. And at the rear floor front cross beam 103, a rear floor front cross beam reinforcing plate 300 can be further arranged, which is connected between the two side rocker beams 2a, and which also forms a cavity structure with the rear floor front cross beam 103, the rear floor panel 200, etc., so as to increase the structural strength at the position of the rear floor front cross beam 103.

[0098] In the embodiment, the rear end of each side rocker beam 2 has a rear rocker beam 2a, and each side rocker beam 2 is connected to the same side rear floor longitudinal beam 101 through the rear rocker beam 2a. And as the rear end part of the rocker beam 2, the main role of the rear rocker beam 2a is to be connected with the rear floor longitudinal beam 101, the C pillar, etc., and specifically, the rear end of the rear rocker beam 2a is usually connected with the rear floor longitudinal beam 101, the longitudinal beam cover plate 200a, the front end of the rear wheel cover, etc., to be connected into a stable structure.

[0099] In the embodiment, each side rear rocker beam 2a is connected to the front section 101a of the same side rear floor longitudinal beam 101, and the left and right sides of the rear floor lower cross beam 6 are also connected to the corresponding side rear rocker beam 2a. In this way, it can be understood that by arranging the rear rocker beam 2a and connecting the rear floor lower cross beam 6 to the two side rocker beams 2a, the connection between the rear floor lower cross beam 6 and the two side rocker beams of the vehicle body can be established, thereby improving the setting effect of the rear floor lower cross beam 6.

[0100] In the embodiment, the rear floor lower cross beam 6 is in the shape of a "C" with the opening facing forward, and the structure of the rear floor lower cross beam 6 is as shown in Figure 8 For ease of description, the rear floor lower cross beam 6 in the shape of "C" can be divided into left and right lower cross beam side portions 6a and a middle lower cross beam middle portion 6b. Among them, the left and right lower cross beam side portions 6a are mainly connected with the front section 101a of the two side rear floor longitudinal beams 101 and the two side rear rocker beams 2a, and the middle lower cross beam middle portion 6b is mainly connected with the rear floor middle cross beam 102.

[0101] In order to better increase the structural strength of the two sides of the front part of the rear floor assembly 1, the rear floor lower cross beam 6 is further arranged to have a rear floor lower cross beam reinforcing plate 600, which is arranged on the rear floor lower cross beam 6 and is connected to the rear floor lower cross beam 6 through the rear floor lower cross beam reinforcing plate 600. In this way, the rear floor lower cross beam 6 and the rear floor lower cross beam reinforcing plate 600 form a cavity structure, so as to increase the structural strength of the two sides of the front part of the rear floor assembly 1. Figure 9As shown, taking one side as an example, in this embodiment, a longitudinal beam front section cavity M is also formed between the front section 101a, the rear sill beam 2a, and the rear floor panel 200 on each side. At the same time, a lower crossbeam side cavity N is formed between the front section 101a, the rear sill beam 2a, and the lower crossbeam 6 of the rear floor. The longitudinal beam front section cavity M and the lower crossbeam side cavity N are stacked in the vertical direction of the entire vehicle.

[0102] At this point, by forming the upper and lower stacked longitudinal beam front cavity M and the lower crossbeam side cavity N, the dual-cavity structure can be used to increase the structural strength of the front two sides of the rear floor assembly.

[0103] Based on the aforementioned longitudinal beam front cavity M and lower crossbeam side cavity N, this embodiment preferably continues as follows: Figure 10 As shown, a middle crossbeam cavity S is formed between the middle crossbeam 102 of the rear floor and the rear floor panel 200. At the same time, a lower crossbeam middle cavity T is formed between the lower crossbeam 6 of the rear floor and the middle crossbeam 102 of the rear floor. The middle crossbeam cavity S and the lower crossbeam middle cavity T are also stacked in the vertical direction of the whole vehicle.

[0104] In this way, by forming the middle crossbeam cavity S and the lower crossbeam middle cavity T, which are also stacked in the upper and lower layers, the structural strength of the front middle position of the rear floor assembly can be increased by utilizing the double cavity structure. At the same time, it can also cooperate with the double cavity structures on both sides to improve the dynamic stiffness of the front mounting point of the rear subframe and improve the collision performance of the rear of the vehicle.

[0105] In this embodiment, it is still by Figure 1 and combined Figure 11 , Figure 12 As shown, reinforcing plates 9 extending along the longitudinal direction of the vehicle are provided on the side of the sill beams 2 facing the interior of the vehicle. The front end of each reinforcing plate 9 is connected to the front engine compartment longitudinal beam 4 on the same side via the front bulkhead longitudinal beam 10a, and the rear end of each reinforcing plate 9 is connected to the rear floor longitudinal beam 101 on the same side. In addition, each reinforcing plate 9 also overlaps on one side of the sill beam 2 on the same side, and the other side is connected to the front floor panel 3, thereby forming a reinforcing plate cavity W between the sill beam 2, the front floor panel 3 and the reinforcing plate 9.

[0106] At this time, by setting a reinforcing plate 9 on the inner side of the sill beam 2, and forming a reinforcing plate cavity W between the sill beam 2, the reinforcing plate 9 and the front floor panel 3 can increase the structural strength of the sill beam 2 by utilizing the increased reinforcing plate 9, especially the high structural strength of the cavity formed, thereby improving the overall structural strength of the middle part of the vehicle body and improving the vehicle's collision response capability.

[0107] In the embodiment, the cross section of each side reinforcing plate 9 is substantially in the shape of "L", and can be formed by stamping. In addition, the side of each reinforcing plate 9 close to the front floor panel 3 can be formed with a flange structure to better connect with the front floor panel 3. Meanwhile, the reinforcing plate 9 can be connected with the rocker beam 2 and the front floor panel 3 by spot welding.

[0108] It is worth mentioning that the front wall longitudinal beam 10a in the embodiment can be integrally formed on the bottom of the front wall 10, that is, the front wall longitudinal beam 10a is formed on the bottom of the front wall 10 by stamping when the front wall 10 is manufactured. Of course, in addition to being integrally formed on the front wall 10, the front wall longitudinal beam 10a can also be formed by welding a corresponding beam structure on the front wall 10.

[0109] In addition, it should be noted that the front engine compartment longitudinal beam 4 and the front wall longitudinal beam 10a are arranged on the front and rear sides of the front wall 10, respectively, and the reinforcing plate 9 and the rear floor longitudinal beam 101 are arranged on the front and rear sides of the rear floor front cross beam reinforcement 300, respectively. Therefore, the connection between the same side front wall longitudinal beam 10a and the front engine compartment longitudinal beam 4 is arranged such that the projections of the same side front wall longitudinal beam 10a and the front engine compartment longitudinal beam 4 in the front-rear direction of the vehicle at least partially overlap. Similarly, the rear end of the same side reinforcing plate 9 is connected with the rear floor longitudinal beam 101, that is, the projections of the same side reinforcing plate 9 and the rear floor longitudinal beam 101 in the front-rear direction of the vehicle at least partially overlap. Through the above projection overlap in the front-rear direction of the vehicle, the front wall longitudinal beam 10a and the front engine compartment longitudinal beam 4, and the reinforcing plate 9 and the rear floor longitudinal beam 101 form a front-rear communication force transmission channel for transmitting and dispersing the collision force during a vehicle collision.

[0110] In the embodiment, the front row seat mounting cross beams 5 are connected between the two rocker beams 2, and the front row seat mounting cross beams 5 are arranged in two sections along the front-rear direction of the vehicle. In addition, the left and right ends of each front row seat mounting cross beam 5 are connected with the rocker beam 2 through the reinforcing plate 9. Meanwhile, each front row seat mounting cross beam 5 in the embodiment can be in a two-section structure, that is, each front row seat mounting cross beam 5 is divided into two sections by the center tunnel 11, one end of each section is connected with the center tunnel 11, and the other end is connected with the rocker beam 2.

[0111] Alternatively, as a preferred embodiment, referring to Figure 1 each front row seat mounting cross beam 5 in the embodiment can be connected through one rocker beam 2 to the other rocker beam 2. At this time, it can be understood that the front row seat mounting cross beam 5 is in a through structure, which can ensure the continuity of the force transmission channel formed by the front row seat mounting cross beam 5, and is beneficial to improving the side impact force transmission capability.

[0112] In addition, in addition to connecting the end of each front seat installation cross beam 5 to the rocker beam 2 through the reinforcing plate 9, of course, in actual implementation, on the basis of being connectable to the rocker beam 2 through the reinforcing plate 9, the embodiment further makes the end of each front seat installation cross beam 5 penetrate through the reinforcing plate 9 and be directly connected to the rocker beam 2. In this way, the connection strength between the front seat installation cross beam 5 and the rocker beam 2 can be increased, and the structure reinforcement effect of the vehicle body Y direction (left-right direction of the vehicle) after the front seat installation cross beam 5 is set can be improved.

[0113] As a preferred implementation form, in combination with the front seat installation cross beam 5 shown in Figure 13 , the front seat installation cross beam 5 of the embodiment can be integrally formed by a rolling process, and in terms of structure, the front seat installation cross beam 5 is also provided with multiple cross beam bodies 5a connected in sequence along the front-rear direction of the vehicle. The cross section of each cross beam body 5a is in the shape of a "J" character.

[0114] At this time, making the front seat installation cross beam 5 formed by a rolling process and making the front seat installation cross beam 5 composed of multiple cross beam bodies 5a with a cross section in the shape of a "J" character can increase the structural strength of the front seat installation cross beam 5 itself, help to improve the stability of the front seat setting, and also be beneficial to improving the torsional stiffness of the middle part of the vehicle body and the collision force transmission effect of the front seat installation cross beam 5.

[0115] In the embodiment, seat installation supports 501 are respectively arranged on each front seat installation cross beam 5, the seat installation supports 501 are multiple and arranged at intervals along the left-right direction of the vehicle, and in particular, still referring to Figure 12 , the seat installation supports 501 are arranged at the positions where the front seat installation cross beam 5 intersects with the two side reinforcing plates 9. In this way, by arranging the seat installation supports 501 at the positions where the front seat installation cross beam 5 intersects with the reinforcing plates 9, the stopping wall position of the side impact can be formed by the reinforcing effect of the seat installation supports 501, so that the part outside the stopping wall position can be fully collapsed to absorb energy, thereby improving the safety of the inner battery pack.

[0116] It should be noted that in addition to being installed on the rocker beam 2 through the mounting lugs 13 on the left and right sides, the front end of the battery pack 12 of the embodiment can be connected to the cabin rear section beam 8 and the torsion boxes 7 on the two sides, and the rear end of the battery pack 12 can be connected to the rear floor lower beam 6. At this time, the battery pack 12 is connected to each beam body and the torsion box 7 respectively to be arranged in the vehicle body, which not only can realize the installation and arrangement of the battery pack 12 in the vehicle body, but also can improve the reliability of the installation of the battery pack 12 by the annular structure formed by each beam body and the torsion box 7.

[0117] In practice, the mounting points of the battery pack 12 on the rear floor lower cross beam 6, the torsion box 7 and the rear cabin cross beam 8 can generally adopt conventional mounting structure forms such as threaded sleeves or projection-welded nuts.

[0118] As shown in FIG. 1, the mounting lug 13 of the battery pack 12 is arranged on the side sill beam 2. Figures 14 to 20 As a preferred implementation form, in the embodiment, the side sill beams 2 are each provided with a nut plate 14, and each side mounting lug 13 has a first portion 1301 connected to the battery pack 12 and a second portion 1302 connected to the outside of the first portion 1301.

[0119] In addition, each side sill beam 2 is adapted to the same side second portion 1302 and abuts against the same side second portion 1302, and at the same time, each side second portion 202 is connected to the same side nut plate 14 through the connecting bolt 16 passing through itself.

[0120] It can be understood that the mounting lug 13 of the side of the battery pack 12 has the first portion 1301 and the second portion 1302 connected thereto, the second portion 1302 is inclined downward, and the side sill beam 2 is adapted to the second portion 1302. In this way, the inclined design of the second portion 1302 of the mounting lug 13 in the embodiment can cause the mounting lug 13 to be fully crushed during a side impact to absorb the impact energy, so that each side mounting lug 13 forms the side impact energy-absorbing structure. Of course, through the inclined design of the second portion 1302, the battery pack 12 can also slide downward during a side impact to avoid being squeezed by the vehicle body structure, thereby also improving the safety of the battery pack 12.

[0121] As a preferred implementation form, in the embodiment, the first portion 1301 is also inclined upward in the vehicle left-right direction and in the direction pointing outward of the vehicle. At this time, by inclining the first portion 1301 upward, the mounting lug 13 as a whole has a better crushing and energy-absorbing effect in cooperation with the inclined design of the second portion 1302.

[0122] As shown in FIG. 1, the mounting lug 13 of the battery pack 12 is arranged on the side sill beam 2. Figure 18 As a preferred implementation form, in the embodiment, each side mounting lug 13 also has a plurality of plate bodies 13a arranged in the vehicle up-down direction, each plate body 13a is extended from the second portion 1302 to the first portion 1301 and connected to the battery pack 12.

[0123] At this time, it can be understood that the mounting lug 13 is provided with a plurality of plate bodies 13a arranged in an up-down interval, and each plate body 13a extends to be connected with the battery pack 12, so that each plate body 13a forms a force transmission channel in the Y direction of the vehicle (i.e. the left-right direction of the vehicle), thereby helping to disperse the transmission of the collision force to the frame of the battery pack 12, so as to reduce the impact damage caused by the collision while crushing the energy absorption. When a side collision occurs, the force transmission channel formed by each plate body 13a in the mounting lug 13 can again refer to Figure 18

[0124] Based on the plurality of plate bodies 13a arranged in an interval in the mounting lug 13, as a preferred embodiment, the embodiment also connects a reinforcing rib 13b between the two adjacent plate bodies 13a, and the reinforcing rib 13b separates a plurality of lug cavities Q between the two adjacent plate bodies 13a. At this time, by arranging the reinforcing rib 13b between the adjacent plate bodies 13a and separating the lug cavities Q by the reinforcing rib 13b, it is obvious that it can increase the structural strength of the mounting lug 13 to ensure the reliability of the installation of the battery pack 12, and it can be understood that the structural strength of the mounting lug 13 is improved, and of course it can also improve the energy absorption capacity of the mounting lug 13 when it is crushed, so as to better absorb the collision energy and reduce the collision impact on the battery pack 12.

[0125] In the embodiment, the mounting lug 13 described above can be formed by machining or casting, and can be connected to the side of the battery pack 12 by screwing, welding or the like. However, in specific implementation, as a preferred embodiment, the side of the battery pack 12 of the embodiment has a side beam 1201, and the mounting lug 13 is specifically connected to the side beam 1201, and the mounting lug 13 and the side beam 1201 on the same side are also made of aluminum alloy and are integrally extruded.

[0126] In this way, the mounting lug 13 and the side beam 1201 of the side of the battery pack 12 are integrally extruded, which can facilitate the preparation of the mounting lug 13 and the connection between the mounting lug 13 and the battery pack 12, and can also ensure the structural strength of the mounting lug 13 and the connection strength between the mounting lug 13 and the battery pack 12.

[0127] In addition, based on the extrusion molding, the side beam 1201 of the embodiment is hollow, and as a preferred embodiment, a plurality of reinforcing ribs are arranged in the side beam 1201. The reinforcing ribs described above can be arranged in an interval in the up-down direction of the vehicle, and further, from the cross section of the side beam 1201 and the mounting lug 13, one of the reinforcing ribs can be arranged along the extension line of one of the plate bodies 13a.

[0128] ​It can be understood that, by arranging the reinforcing ribs inside the side beam 1201, the structural strength of the side beam 1201 can be further increased, and the structural safety of the battery pack 12 can be increased. As described above, arranging one of the reinforcing ribs along the extension line of the plate body 13a is also conducive to the continuity of the collision force transmission channel formed between the plate body 13a and the side beam 1201, and thus the transmission and dispersion effect of the collision force at the side beam 1201 can be improved.

[0129] In a specific implementation, the reinforcing ribs inside the side beam 1201 may, for example, be two, and are referred to as a first reinforcing rib 1201a and a second reinforcing rib 1201b. At the same time, the plate bodies 13 in the mounting lug 13 may, for example, be three arranged in an upper and lower spaced manner. The first reinforcing rib 1201a is arranged along the extension line of the middle plate body 13a, as shown in FIG. 12A, to form a through force transmission channel between the mounting lug 13 and the side beam 1201. Figure 18

[0130] Of course, in addition to the above arrangement of the middle plate body 13a and the first reinforcing rib 1201a, in the specific implementation of the present embodiment, for the bottom plate body 13a, the side connected to the side beam 1201 can be arranged close to the second reinforcing rib 1201b. For the top plate body 13a, it can be connected to the top of the side beam 1201, so that the collision force transmission effect between the mounting lug 13 and the side beam 1201 can be better improved.

[0131] In the present embodiment, as shown in FIGS. 13A and 13B, the first portion 1301 is arranged to gradually decrease in thickness along the entire vehicle up and down direction in the direction pointing to the second portion 1302, and the second portion 1302 is arranged to gradually increase in thickness along the entire vehicle up and down direction in the direction pointing to the first portion 1301. Figure 17 Figure 18 At this time, the first portion 1301 gradually decreases in thickness in the direction pointing to the second portion 1302, and the second portion 1302 gradually increases in thickness in the direction pointing to the first portion 1301, that is, the cross-sectional thickness of the connection point between the mounting lug 13 and the rocker beam 2 and the middle position between the root of the mounting lug 13 is small, which is conducive to guiding the bending of the mounting lug in a side collision, and conducive to the collapse of the mounting lug 13, so as to better achieve the energy absorption of the collapse.

[0132] In the present embodiment, since the mounting lug 13 adopts an extruded aluminum structure, as shown in FIGS. 14A and 14B, the mounting lug 13 is arranged to gradually decrease in thickness along the entire vehicle up and down direction in the direction pointing to the second portion 1302, and the second portion 1302 is arranged to gradually increase in thickness along the entire vehicle up and down direction in the direction pointing to the first portion 1301. Figure 16 ​​As shown, in order to facilitate the installation of the lifting lug 13, the nut plate 14 on the rocker beam 2 is connected through the connecting bolt 16. In actual implementation, a mounting sleeve 15 can also be arranged on the installation lug 13. The mounting sleeve 15 is inserted into the installation lug 13 and can be fixedly connected with the installation lug 13 by welding. When the battery pack 12 is assembled, the connecting bolt 16 is screwed to the nut plate 14 through the mounting sleeve 15.

[0133] As shown in FIG. 1, Figures 19 to 22 As a preferred implementation form, the nut plate 14 of the embodiment has a bottom plate 1401 and a welding nut 1402 arranged on the bottom plate 1401. The rocker beam 2 is also provided with a mounting via hole 201 arranged corresponding to the nut hole 1402a of the welding nut 1402. The mounting via hole 201 is a long hole extending along the left-right direction of the whole vehicle. Meanwhile, the bottom plate 1401 is connected with a collapse plate 1401a through a deformable connecting part 1401b. The welding nut 1402 is connected to the collapse plate 1401a, and when the connecting part 1401b is deformed, the welding nut 1402 can move relative to the bottom plate 1401 along the length direction of the mounting via hole 201.

[0134] At this time, by making the nut plate 14 consist of the bottom plate 1401 and the welding nut 1402, making the mounting via hole 201 a long strip along the left-right direction of the whole vehicle, and making the welding nut 1402 move relative to the bottom plate 1401 along the length direction of the mounting via hole 201, it can realize the collapse displacement of the battery pack 12 mounting point when a side collision occurs, thereby facilitating the reduction of the collision impact on the battery pack 12 and improving the safety of the battery pack 12.

[0135] In detail, for the nut plate 14, the bottom plate 1401 is preferably connected to the rocker beam 2 by spot welding. As an exemplary structure, the embodiment is provided with a through hole 1401c on the bottom plate 1401, and the collapse plate 1401a is located in the through hole 1401c. The collapse plate 1401a is located at both ends in the length direction of the mounting via hole 201 (i.e. the left-right direction of the whole vehicle), one end is connected to the bottom plate 1401 through the connecting part 1401b, and the other end forms a collapse deformation area t with the inner wall of the through hole 1401c.

[0136] It can be understood that by making the collapse plate 1401a arranged in the through hole 1401c on the bottom plate 1401, and making one end of the collapse plate 1401a connected to the bottom plate 1401 through the connecting part 1401b and the other end forming the collapse deformation area t, it is helpful to simplify the structure of the nut plate 14, and can limit the moving distance of the collapse plate 1401a with the welding nut 1402, and can ensure the use effect of the nut plate 14 when collapsing.

[0137] In this embodiment, as a preferred implementation form, still in combination with Figure 22 As shown in the drawings, one side of the through hole 1401c also forms an opening K to the outside of the bottom plate 1401, and the connecting portion 1401b is located at the opening K, and the connecting portion 1401b is specifically two oppositely arranged at the opening K. In addition, each connecting portion 1401b of the embodiment is also connected to the bottom plate 1401 through the connecting arm 1401d, and in the front-rear direction of the vehicle, the front and rear sides of the crush plate 1401a and the inner wall of the through hole 1401c are both provided with a gap e. Moreover, both sides of the gap e are in communication with the crush deformation space t.

[0138] At this time, the connecting portion 1401b is two oppositely arranged at the opening K, which can ensure the reliability of the connection between the crush plate 1401a and the bottom plate 1401. By providing the connecting arm 1401d and making the front and rear sides of the crush plate 1401a and the inner wall of the through hole 1401c have a gap e, the embodiment not only facilitates the movement of the crush plate 1401a in the Y direction (left-right direction of the vehicle), but also has a certain movement ability in the X direction (front-rear direction of the vehicle), thereby helping to improve the safety of the battery pack 12 in the event of a frontal or rear collision.

[0139] It is worth noting that in specific implementation, the connecting portion 1401b of the embodiment may, for example, adopt a curved connecting plate. In a natural state, the connecting plate is curved and achieves the arrangement of the crush plate 1401a in the bottom plate 1401. When the vehicle is subjected to a side impact, the rocker beam 2 is stressed and transmits the impact force to the crush plate 1401a through the connecting bolt 16 connected to the welded nut 1402. Then, the crush plate 1401a pulls the connecting portion 1401b, which can deform the curved connecting portion 1401b and compress the crush deformation area t, thereby achieving the crush function of the battery pack 12 mounting point.

[0140] It can be understood that the embodiment makes the connecting portion 1401b adopt a curved connecting plate, which not only has the advantages of simple structure and easy to manufacture, but also has good crush deformation effect. Moreover, in specific implementation, of course, in addition to using a curved connecting plate at the opening K, the connecting portion 1401b can also be arranged at other positions, for example, a connecting portion 1401b composed of a curved connecting plate is arranged at the gap e on the front and rear sides of the crush plate 1401a, which is also possible.

[0141] This embodiment is still as Figure 17As shown in the figure, when a side impact occurs, the side impact force F is decomposed into F2 along the normal direction of the mounting surface of the mounting lug 13, and the component F2 produces a moment around the root of the mounting lug 13 with a force arm L, thereby deforming and collapsing the mounting lug 13 on the side of the battery pack 12 to absorb the impact energy, thereby reducing the damage of the side impact to the structures such as the battery cells inside the battery pack 12, and improving the safety of the battery pack 12.

[0142] Of course, the ring structure formed by the rear floor lower beam 6, the rear cabin beam 8, and the two side rocker beams 2 and the torsion boxes 7 not only reduces the intrusion of the side impact into the battery pack 12, but also disperses the side impact force, thereby reducing the damage caused by the impact.

[0143] As shown in the figure, when a side impact occurs, the side impact force F is decomposed into F2 along the normal direction of the mounting surface of the mounting lug 13, and the component F2 produces a moment around the root of the mounting lug 13 with a force arm L, thereby deforming and collapsing the mounting lug 13 on the side of the battery pack 12 to absorb the impact energy, thereby reducing the damage of the side impact to the structures such as the battery cells inside the battery pack 12, and improving the safety of the battery pack 12. Figure 23 As shown in the figure, when a side impact occurs, the side impact force F is decomposed into F2 along the normal direction of the mounting surface of the mounting lug 13, and the component F2 produces a moment around the root of the mounting lug 13 with a force arm L, thereby deforming and collapsing the mounting lug 13 on the side of the battery pack 12 to absorb the impact energy, thereby reducing the damage of the side impact to the structures such as the battery cells inside the battery pack 12, and improving the safety of the battery pack 12.

[0144] In this way, the impact force is absorbed and dissipated by the transmission and dispersion of the front cabin longitudinal beam 4, the torsion box 7, the rear cabin beam 8, the rocker beam 2, and the rear floor frame 100 and the rear floor lower beam 6, thereby improving the crash safety of the vehicle.

[0145] The vehicle body of the vehicle of the embodiment forms a ring structure by connecting the rear floor lower beam 6, the rear cabin beam 8, and the two side rocker beams 2 and the torsion boxes 7, and enables the mounting lug 13 to collapse in the left-right direction of the vehicle to form a side impact energy-absorbing structure on the left and right sides of the battery pack 12. Therefore, the vehicle body of the embodiment not only strengthens the vehicle body by the formed ring structure to improve the structural strength and torsional stiffness of the bottom of the vehicle body, and avoids the battery pack 12 from being squeezed and deformed when the battery pack 12 collides, but also absorbs the impact of the battery pack 12 when a side impact occurs by the collapse of the mounting lug 13, which is beneficial to improving the safety of the battery pack 13, and has very practicality.

[0146] Embodiment Two

[0147] The embodiment relates to a vehicle, which has the vehicle body in the embodiment one. Moreover, the vehicle in the embodiment can strengthen the vehicle body by arranging the vehicle body in the embodiment one, can avoid the battery pack 12 from being extruded to deform when the battery pack 12 collides, can slow down the collision impact on the battery pack 12 when a side collision occurs, and is beneficial to improve the collision safety of the battery pack 12, and has good practicability.

[0148] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vehicle body, characterized in that: comprising a lower body (1000), and a battery pack (12) connected at the bottom of the lower body (1000); the lower body (1000) has a rear floor lower cross beam (6) located at the bottom of a rear floor assembly (1), a rocker beam (2) separately arranged on the left and right sides, and a torsion box (7) connected at the rear end of a front engine compartment longitudinal beam (4) on the left and right sides, respectively; an engine compartment rear section cross beam (8) is arranged between the torsion boxes (7) on both sides, and the rear floor lower cross beam (6), the engine compartment rear section cross beam (8), and the rocker beams (2) and the torsion boxes (7) on both sides are connected to form a ring structure; the battery pack (12) is arranged in the ring structure, and mounting lugs (13) are arranged on the left and right sides of the battery pack (12), the mounting lugs (13) on each side are connected with the rocker beam (2) on the same side, and the mounting lugs (13) on both sides can collapse in the left and right directions of the whole vehicle to form a side impact energy absorption structure on the left and right sides of the battery pack (12); each side of the mounting lug (13) has a first part (1301) connected with the battery pack (12), and a second part (1302) connected outside the first part (1301), in the left and right directions of the whole vehicle, each side of the second part (1302) is arranged downward in the direction pointing to the outside of the vehicle, and each side of the rocker beam (2) is adapted to the second part (1302) on the same side and abuts on the second part (1302) on the same side. 2.A vehicle body according to claim 1, characterized in that: the rear floor assembly (1) has a rear floor framework (100), and a rear floor panel (200) covering above the rear floor framework (100); the rear floor framework (100) has rear floor longitudinal beams (101) separately arranged on both sides, and a rear floor middle cross beam (102) connected between the rear floor longitudinal beams (101) on both sides; each side of the rear floor longitudinal beam (101) is connected with the rocker beam (2) on the same side, the rear floor lower cross beam (6) is in a "C" shape with an opening facing forward, and the rear floor lower cross beam (6) is connected between the front section (101a) of the rear floor longitudinal beam (101) on both sides and the rear floor middle cross beam (102). 3.A vehicle body according to claim 2, characterized in that: the rear floor framework (100) further has a rear floor front cross beam (103) and a rear floor rear cross beam (104); the rear floor front cross beam (103) is connected between the front sections (101a) of the rear floor longitudinal beams (101) on both sides, the rear floor rear cross beam (104) is connected between the rear sections (101b) of the rear floor longitudinal beams (101) on both sides, and the rear floor middle cross beam (102) is connected at the transition area between the front section (101a) and the rear section (101b) of each side of the rear floor longitudinal beam (101). The rear floor front cross beam (103), the rear floor middle cross beam (102) and the two side rear floor longitudinal beams (101) are connected to form a ring structure, and the rear floor rear cross beam (104), the rear floor middle cross beam (102) and the two side rear floor longitudinal beams (101) are connected to form a ring structure.

4. The vehicle body of claim 3, wherein: The rear ends of the two side rocker beams (2) are each provided with a rear rocker beam (2a), and each side rear rocker beam (2a) is connected to the rear floor longitudinal beam (101); Each side front section (101a), rear rocker beam (2a) and rear floor panel (200) is surrounded by a longitudinal beam front section cavity (M), and each side front section (101a), rear rocker beam (2a) and rear floor lower cross beam (6) is surrounded by a lower cross beam side cavity (N); The longitudinal beam front section cavity (M) and the lower cross beam side cavity (N) are stacked in the up-down direction of the vehicle.

5. The vehicle body of claim 4, wherein: The rear floor middle cross beam (102) and the rear floor panel (200) are surrounded by a middle cross beam cavity (S); The rear floor lower cross beam (6) and the rear floor middle cross beam (102) are surrounded by a lower cross beam middle cavity (T); The middle cross beam cavity (S) and the lower cross beam middle cavity (T) are stacked in the up-down direction of the vehicle.

6. The vehicle body of claim 2, wherein: Each side of the two side rocker beams (2) facing the interior of the vehicle is provided with a reinforcing plate (9) extending in the front-rear direction of the vehicle; The front end of each side reinforcing plate (9) is connected to the same side front engine compartment longitudinal beam (4) through a front wall longitudinal beam (10a), and the rear end of each side reinforcing plate (9) is connected to the same side rear floor longitudinal beam (101); Each side reinforcing plate (9) is overlapped on the same side rocker beam (2) on one side and connected to the front floor panel (3) on the other side, and a reinforcing plate cavity (W) is formed between the rocker beam (2), the front floor panel (3) and the reinforcing plate (9).

7. The vehicle body of claim 6, wherein: The two side rocker beams (2) are connected by a front row seat mounting cross beam (5); The left and right ends of the front row seat mounting cross beam (5) are connected to the rocker beam (2) through the reinforcing plate (9).

8. The vehicle body of claim 7, wherein: The front row seat mounting cross beam (5) is integrally formed by rolling process, and the front row seat mounting cross beam (5) has a plurality of cross beam bodies (5a) connected in sequence in the front-rear direction of the vehicle, and the cross section of each cross beam body (5a) is in the shape of "J"; and / or The front row seat mounting cross beam (5) is provided with a seat mounting bracket (501), and the front row seat mounting cross beam (5) is provided with the seat mounting bracket (501) at the position where it intersects with the two side reinforcing plates (9).

9. The vehicle body of any one of claims 1-8, wherein: each of the rocker beams (2) is provided with a nut plate (14); each of the second portions (1302) is connected to the same-side nut plate (14) via a connecting bolt (16) passing therethrough.

10. The vehicle body of claim 9, wherein: in the vehicle transverse direction, the first portion (1301) is arranged upwardly in a direction pointing outwardly of the vehicle; and / or the mounting lug (13) has a plurality of plate bodies (13a) arranged in the vehicle vertical direction, each of the plate bodies (13a) is extended from the second portion (1302) to the first portion (1301) and connected to the battery pack (12).

11. The vehicle body of claim 9, wherein: the side portion of the battery pack (12) has a side beam (1201), the mounting lug (13) is connected to the side beam (1201), and the mounting lug (13) and the side beam (1201) are integrally extruded; and / or in a direction pointing to the second portion (1302), the first portion (1301) is arranged with a thickness gradually decreasing in the vehicle vertical direction, and in a direction pointing to the first portion (1301), the second portion (1302) is arranged with a thickness gradually increasing in the vehicle vertical direction.

12. The vehicle body of claim 9, wherein: the nut plate (14) has a bottom plate (1401) and a welding nut (1402) arranged on the bottom plate (1401), and the rocker beam (2) is provided with a mounting via hole (201) arranged corresponding to the nut hole (1402a) of the welding nut (1402); the mounting via hole (201) is an elongated hole extending in the vehicle transverse direction, the bottom plate (1401) is connected to a collapse plate (1401a) via a deformable connecting portion (1401b), and the welding nut (1402) is connected to the collapse plate (1401a); when the connecting portion (1401b) is deformed, the welding nut (1402) can move relative to the bottom plate (1401) in the length direction of the mounting via hole (201).

13. The vehicle body of claim 12, wherein: the bottom plate (1401) is provided with a through hole (1401c), and the collapse plate (1401a) is located in the through hole (1401c); the collapse plate (1401a) is located at one of the two ends in the length direction of the mounting via hole (201), and the other end forms a crush deformation space (t) with the inner wall of the through hole (1401c) through the connecting portion (1401b) connected to the bottom plate (1401).

14. The vehicle body of claim 13, wherein: The through hole (1401c) forms an opening (K) on one side to the outside of the bottom plate (1401), and the connecting part (1401b) is located at the opening (K) and is arranged opposite to two openings (K); Each connecting part (1401b) is connected to the bottom plate (1401) through a connecting arm (1401d), and in the front-rear direction of the vehicle, there is a gap (e) between the front and rear sides of the crush plate (1401a) and the inner wall of the through hole (1401c), and the gaps (e) on both sides are in communication with the crush deformation space (t).

15. A vehicle, characterized in that: The vehicle has a vehicle body of any one of claims 1 to 14.

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