Vehicle body and vehicle

Abstract

The invention provides a vehicle body and a vehicle. The vehicle body comprises a lower vehicle body and a battery pack connected to the bottom of the lower vehicle body, and the lower vehicle body is provided with a rear floor lower cross beam, threshold beams arranged on the two sides of the lower vehicle body respectively and a torsion box connected to the rear end of a front cabin longitudinal beam; a cabin rear section cross beam is arranged between the torsion boxes on the two sides, and the rear floor lower cross beam, the cabin rear section cross beam, the threshold beams on the two sides and the torsion boxes are connected to form an annular structure. The battery pack is arranged in the annular structure, mounting lifting lugs are arranged on the left side and the right side of the battery pack, the mounting lifting lugs on the sides are connected with the doorsill beam, and the mounting lifting lugs on the two sides form side collision energy absorption structures located on the left side and the right side of the battery pack. According to the vehicle body of the vehicle, the formed annular structure can be used for reinforcing the vehicle body, deformation caused by extrusion during collision of the battery pack is avoided, collision impact on the battery pack can be relieved through collapse energy absorption of the mounting lifting lugs during side collision, and the safety of the battery pack can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle body structures, and in particular to a vehicle body. The present invention also relates to a vehicle having the above vehicle body. Background Art

[0002] At present, new energy vehicles, mainly pure electric and hybrid models, are gradually becoming the mainstream of the automobile market. In existing new energy vehicle models, it is generally necessary to install a battery pack with a certain capacity in the vehicle body, and the battery pack in most models is arranged under the front floor of the vehicle body to better utilize the vehicle body space and avoid affecting the setting of other body parts. As people pay more and more attention to the safety of new energy vehicle models, the collision safety of the battery pack has become an important indicator for measuring the safety of the whole vehicle, but the existing new energy vehicle models still have deficiencies in the collision protection design of the battery pack, and further improvements are urgently needed to improve the safety of the battery pack. Summary of the invention

[0003] In view of this, the present invention aims to provide a vehicle body to improve the safety of a battery pack.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

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

[0006] The lower body has a rear floor lower cross beam located at the bottom of the rear floor assembly, sill beams arranged on the left and right sides, and a torsion box connected to the rear ends of the left and right front cabin longitudinal beams respectively;

[0007] A rear section cross beam of the cabin is provided between the torsion boxes on both sides, and the lower cross beam of the rear floor, the rear section cross beam of the cabin, the door sill beams on both sides and the torsion box are connected to form a ring structure;

[0008] The battery pack (12) is arranged in the annular structure, and mounting ears are provided on both left and right sides of the battery pack. The mounting ears on each side are connected to the door sill beam on the same side, and the mounting ears on both sides can collapse along the left and right directions of the entire vehicle to form a side impact energy absorption structure located on the left and right sides of the battery pack.

[0009] Furthermore, the rear floor assembly has a rear floor frame and a rear floor panel covering the rear floor frame; the rear floor frame has rear floor longitudinal beams arranged on both sides, and a rear floor middle cross beam connected between the rear floor longitudinal beams on both sides;

[0010] The rear floor longitudinal beams on each side are connected to the door sill beams on the same side, the rear floor lower cross beam is in a "C" shape with an opening facing forward, and the rear floor lower cross beam is connected between the front sections of the rear floor longitudinal beams on both sides and the rear floor middle cross beam.

[0011] Furthermore, the rear floor frame 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 on both sides, the rear floor rear cross beam is connected between the rear sections of the rear floor longitudinal beams on both sides, and the rear floor middle cross beam is connected to the transition area between the front section and the rear section of the rear floor longitudinal beams on each side;

[0013] The front cross beam of the rear floor, the middle cross beam of the rear floor and the longitudinal beams of the rear floor on both sides are connected to form an annular structure, and the rear cross beam of the rear floor, the middle cross beam of the rear floor and the longitudinal beams of the rear floor on both sides are connected to form an annular structure.

[0014] Furthermore, the rear ends of the sill beams on both sides are provided with rear sill beams, and the rear sill beams on each side are connected to the rear floor longitudinal beams;

[0015] A longitudinal beam front section cavity is formed between the front section on each side, the rear sill beam and the rear floor panel, and a lower cross beam side cavity is formed between the front section on each side, the rear sill beam and the lower cross beam of the rear floor; the longitudinal beam front section cavity and the lower cross beam side cavity are stacked in the up and down direction of the vehicle.

[0016] Furthermore, a middle crossbeam cavity is formed between the middle crossbeam of the rear floor and the rear floor panel; a lower crossbeam middle cavity is formed between the lower crossbeam of the rear floor and the middle crossbeam of the rear floor; the middle crossbeam cavity and the lower crossbeam middle cavity are stacked in the up and down direction of the vehicle.

[0017] Furthermore, the side of the sill beams on both sides facing the interior of the vehicle is provided with a reinforcing plate extending along the front-rear direction of the vehicle; the front end of the reinforcing plate on each side is connected to the front engine compartment longitudinal beam on the same side through the front enclosure longitudinal beam, and the rear end of the reinforcing plate on each side is connected to the rear floor longitudinal beam on the same side;

[0018] One side of the reinforcing plate on each side is overlapped on the door sill beam on the same side, and the other side is connected to the front floor panel, and a reinforcing plate cavity is formed between the door sill beam, the front floor panel and the reinforcing plate.

[0019] Furthermore, a front seat mounting cross beam is connected between the threshold beams on both sides; and both left and right ends of the front seat mounting cross beam are connected to the threshold beams through the reinforcement 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 comprises a plurality of cross beam bodies sequentially connected along the front-rear direction of the vehicle, and the cross section of each of the cross beam bodies is in a “J” shape; and / or,

[0021] The front row seat mounting cross beam is provided with a seat mounting bracket, and the seat mounting brackets are provided at positions where the front row seat mounting cross beam intersects with the reinforcement plates on both sides.

[0022] Furthermore, nut plates are provided on the threshold beams on both sides, and the mounting ears on each side have a first portion connected to the battery pack and a second portion connected to the outside of the first portion;

[0023] In the left-right direction of the vehicle, along the direction pointing outward from the vehicle, the second part on each side is arranged downwardly, and the sill beam on each side is adapted to be arranged on the second part on the same side and abuts against the second part on the same side;

[0024] The second part on each side is connected to the nut plate on the same side by connecting bolts passing through the second part.

[0025] Further, in the left-right direction of the vehicle, along the direction pointing outward from the vehicle, the first part is arranged to be inclined upward; and / or,

[0026] The mounting ear has a plurality of plates arranged at intervals along the vertical direction of the vehicle, and each of the plates extends from the second part to the first part and is connected to 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 extruded integrally; and / or,

[0028] Along the direction pointing to the second part, the thickness of the first part along the vertical direction of the whole vehicle is gradually set to be smaller, and along the direction pointing to the first part, the thickness of the second part along the vertical direction of the whole vehicle is gradually set to be larger.

[0029] Further, the nut plate has a bottom plate and welding nuts arranged on the bottom plate, and the threshold beam is provided with mounting holes arranged corresponding to the nut holes of the welding nuts;

[0030] The mounting through hole is a long hole extending in the left-right direction of the vehicle. The base plate is connected to a crush plate via a deformable connecting portion, and the welding nut is connected to the crush plate. When the connecting portion is deformed, the welding nut can move relative to the base plate along the length direction of the mounting through hole.

[0031] Furthermore, 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 through hole in the length direction, one end of which is connected to the bottom plate through the connecting portion, and a compression deformation space is formed between the other end and the inner wall of the through hole.

[0033] Furthermore, one side of the through hole forms an opening extending to the outside of the bottom plate, and the connecting portion is located at the opening and is two connecting portions arranged opposite to each other at the opening;

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

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

[0036] The body of the vehicle described in the present invention is such that the lower cross beam of the rear floor, the rear cross beam of the cabin, and the door sill beams and the torsion box on both sides are connected to form an annular structure, and the mounting ears can collapse along the left and right directions of the entire vehicle to form a side impact energy absorption structure located on the left and right sides of the battery pack. Therefore, not only can the formed annular structure be used to strengthen the body, improve the structural strength and torsional rigidity of the bottom of the body, and avoid deformation of the battery pack due to extrusion during collision, but also the collapsing energy absorption of the mounting ears can be used to reduce the collision impact on the battery pack in the event of a side collision, thereby helping to improve the safety of the battery pack.

[0037] In addition, the lower cross beam of the rear floor is connected between the front sections of the rear floor longitudinal beams on both sides and the middle cross beam of the rear floor, which can increase the strength and rigidity of the front position of the rear floor assembly, improve the stability of the rear end installation of the battery pack, and also increase the structural strength of the rear floor frame, thereby improving the torsional rigidity of the entire rear floor assembly. By setting the front cross beam of the rear floor and the rear cross beam of the rear floor, and connecting the front cross beam of the rear floor, the middle cross beam of the rear floor and the longitudinal beams of the rear floor on both sides to form a ring structure, the rear cross beam of the rear floor, the middle cross beam of the rear floor and the longitudinal beams of the rear floor on both sides are also connected to form a ring structure, and the double ring structure can be used to better improve the rigidity of the rear floor frame.

[0038] By forming the longitudinal beam front section cavity and the lower cross beam side cavity stacked up and down, the double cavity structure can be used to increase the structural strength of the two sides of the front of the rear floor assembly. By forming the middle cross beam cavity and the lower cross beam middle cavity stacked up and down, the double cavity structure can also be used to increase the structural strength of the middle position of the front of the rear floor assembly, and at the same time, it can 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 collision performance of the rear of the vehicle body.

[0039] Secondly, by setting a reinforcement plate on the inner side of the sill beam and forming a cavity between the sill beam, the reinforcement plate and the front floor panel, the structural strength of the sill beam position can be increased by utilizing the added reinforcement plate, especially the high structural strength of the formed cavity, thereby improving the overall structural strength of the middle part of the vehicle body, which is beneficial to improving the collision response capability of the vehicle. The front seat mounting crossbeam is a through structure, which can ensure the penetration of the force transmission channel formed by the front seat mounting crossbeam, which is beneficial to improving the side collision force transmission capability.

[0040] The front seat mounting crossbeam is formed by a roll forming process, and is composed of multiple crossbeam bodies with a "F"-shaped cross section, which can increase the structural strength of the front seat mounting crossbeam itself, help improve the stability of the front seat installation, and also help improve the torsional rigidity of the middle part of the vehicle body and the collision force transmission effect of the front seat mounting crossbeam. The seat mounting bracket is set at the intersection of the front seat mounting crossbeam and the reinforcement plate, and the reinforcement effect of the seat mounting bracket can be used to form a stop wall position for side collision, so that the outer part of the stop wall position can fully collapse and absorb energy, thereby improving the safety of the battery pack inside.

[0041] Furthermore, the mounting ear has a first part and a second part that are connected, and the second part is set to be tilted downward, and the door sill beam is adapted to the second part. The inclined design of the second part can be used to fully crush the mounting ear in the event of a side collision to form a side collision energy absorption structure. At the same time, it can also make the battery pack slide downward in the event of a side collision to avoid the battery pack being squeezed and collided by the vehicle body structure. The upward tilt of the first part can be matched with the downward tilt of the second part, so that the mounting ear has a better crushing energy absorption effect as a whole. The mounting ear has a plurality of plates arranged at intervals up and down, and each plate extends until it is connected to the battery pack, so that each plate can form a force transmission channel along the Y direction of the vehicle, which helps to transfer and disperse the collision force to the battery pack frame, so as to reduce the impact damage caused by the collision while crushing and absorbing energy.

[0042] The mounting lug is integrally extruded with the side beam on the side of the battery pack, which can facilitate the preparation of the mounting lug and the connection with the battery pack, and can also ensure the structural strength of the mounting lug itself and the connection strength between it and the battery pack. The thickness of the first part gradually decreases along the direction pointing to the second part, and the thickness of the second part gradually increases along the direction pointing to the first part, which is beneficial to the bending of the mounting lug during a side collision to better achieve crushing energy absorption. The nut plate is composed of a base plate and a welding nut, so that the mounting through-hole is a long strip arranged along the left and right direction of the vehicle, and the welding nut can be moved relative to the base plate along the length direction of the mounting through-hole, which can achieve the collapse displacement of the battery pack installation point when a side collision occurs, which is beneficial to reduce the collision impact on the battery pack and improve the safety of the battery pack.

[0043] In addition, the crush plate is arranged in the through hole on the bottom plate, and one end of the crush plate is connected to the bottom plate through the connecting part, and the other end forms a crush deformation space, which helps to simplify the nut plate structure and can limit the moving distance of the welding nut, so as to ensure the use effect of the nut plate when it collapses. The connecting parts are two relatively arranged at the opening, which can ensure the reliability of the connection between the crush plate and the bottom plate. Through the setting of the connecting arm, a gap is provided between the front and rear sides of the crush plate and the inner wall of the through hole, which is not only conducive to the Y-direction movement of the crush plate, but also has a certain movement ability in the X-direction, which helps to improve the safety of the battery pack in the event of a head-on collision or a rear-end collision.

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

[0045] The vehicle described in the present invention has the same beneficial effects as the body of the above-mentioned vehicle, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0047] Figure 1 It is a structural schematic diagram of a vehicle body according to an embodiment of the present invention;

[0048] Figure 2 for Figure 1 A schematic diagram of the structure shown from a bottom perspective;

[0049] Figure 3 It is a schematic diagram of a ring structure formed by a rear floor lower cross beam, a cabin rear section cross beam, and door sill beams and a torsion box on both sides according to an embodiment of the present invention;

[0050] Figure 4 It is a structural schematic diagram of a rear floor assembly according to an embodiment of the present invention;

[0051] Figure 5 for Figure 4 A schematic diagram of the structure shown from a bottom perspective;

[0052] Figure 6 It is a schematic structural diagram of the rear floor frame according to an embodiment of the present invention;

[0053] Figure 7 for Figure 6 A schematic diagram of the structure shown from a bottom perspective;

[0054] Figure 8 This is a schematic structural diagram of the lower cross beam of the rear floor according to an embodiment of the present invention;

[0055] Fig. 9 It is a schematic diagram of the structure of the front cavity of the longitudinal beam and the side cavity of the lower cross beam according to an embodiment of the present invention;

[0056] Fig.10 It is a schematic diagram of the structure of the middle cross beam cavity and the lower cross beam middle cavity according to an embodiment of the present invention;

[0057] Fig.11 It is a schematic diagram of the structure of the reinforcement plate cavity according to an embodiment of the present invention;

[0058] Fig.12 It is a structural schematic diagram of a front seat mounting crossbeam, a reinforcement plate and a seat mounting bracket according to an embodiment of the present invention;

[0059] Fig.13 It is a schematic diagram of the structure of the front seat installation crossbeam according to an embodiment of the present invention;

[0060] Fig.14 A schematic diagram of installing a battery pack according to an embodiment of the present invention;

[0061] Fig.15 for Fig.14 Cross-sectional view at the AA position;

[0062] Fig.16 It is a schematic diagram of the arrangement of the mounting lugs according to an embodiment of the present invention;

[0063] Fig.17 for Fig.16 Cross-section view at the mid-BB position;

[0064] Fig.18 It is a schematic diagram of the structure of the mounting lug and the side beam according to an embodiment of the present invention;

[0065] Fig.19 It is a schematic diagram of the arrangement of the nut plate according to an embodiment of the present invention;

[0066] Fig. 20 for Fig.19 A partial enlarged view of part C in the middle;

[0067] Fig.21 It is a structural schematic diagram of a nut plate according to an embodiment of the present invention;

[0068] Fig. 22 This is a schematic diagram of the structure of the bottom plate according to an embodiment of the present invention;

[0069] Fig.23 A schematic diagram of collision force transmission of a vehicle body according to an embodiment of the present invention;

[0070] Description of reference numerals:

[0071] 1000, lower body;

[0072] 1. Rear floor assembly; 2. Door sill beam; 3. Front floor panel; 4. Front cabin longitudinal beam; 5. Front seat mounting crossbeam; 6. Rear floor lower crossbeam; 7. Torque box; 8. Cabin rear crossbeam; 9. Reinforcement plate; 10. Front panel; 11. Middle channel; 12. Battery pack; 13. Mounting lug; 14. Nut plate; 15. Mounting sleeve; 16. Connecting bolts;

[0073] 100, rear floor frame; 200, rear floor panel; 300, rear floor front cross beam reinforcement plate; 200a, longitudinal beam cover plate; 101, rear floor longitudinal beam; 101a, front section; 101b, rear section; 102, rear floor middle cross beam; 103, rear floor front cross beam; 104, rear floor rear cross beam; 2a, rear door sill beam; 201, mounting hole; 501, seat mounting bracket; 5a, cross beam body; 6a, lower cross beam side; 6b, lower cross beam middle;

[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, front section cavity of longitudinal beam; N, side cavity of lower cross beam; S, middle cross beam cavity; T, middle cavity of lower cross beam; K, opening; Q, lifting ear cavity; W, reinforcement plate cavity. DETAILED DESCRIPTION

[0076] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0077] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0078] In addition, in the description of the present invention, unless otherwise clearly defined, the mating parts may be connected by conventional connection structures in the art. Moreover, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

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

[0080] Embodiment 1

[0081] This embodiment relates to a vehicle body, combined with Figures 1 to 3 As shown in , in terms of overall structure, it includes a lower vehicle body 1000 and a battery pack 12 connected to the bottom of the lower vehicle body 1000 .

[0082] The lower vehicle body 1000 has a rear floor lower cross beam 6 located at the bottom of the rear floor assembly 1, door sill beams 2 disposed on the left and right sides, and torque boxes 7 connected to the rear ends of the left and right front cabin longitudinal beams 4. In addition, a cabin rear section cross beam 8 is disposed between the torsion boxes 7 on both sides, and the rear floor lower cross beam 6, cabin rear section cross beam 8, and the door sill beams 2 and torsion boxes 7 on both sides are also connected to form a ring structure.

[0083] In addition, the battery pack 12 is arranged in the above-mentioned annular structure, and mounting ears 13 are provided on the left and right sides of the battery pack 12. The mounting ears 13 on each side are connected to the door sill beam 2 on the same side, and the mounting ears 13 on both sides can collapse along the left and right directions of the entire vehicle to form a side impact energy absorption structure located on the left and right sides of the battery pack 12.

[0084] The above structure forms a side impact energy absorption structure on the left and right sides of the battery pack 12 by connecting the lower cross beam 6 of the rear floor, the rear cross beam 8 of the cabin, and the door sill beams 2 and the torsion box 7 on both sides to form an annular structure, and allowing the mounting ears 13 on the sides of the battery pack 12 to collapse along the left and right directions of the entire vehicle. This embodiment can not only use the formed annular structure to strengthen the vehicle body, improve the structural strength and torsional rigidity of the bottom of the vehicle body, and prevent the battery pack 12 from being squeezed and deformed during a collision, but also use the collapse energy absorption of the mounting ears 13 to reduce the collision impact on the battery pack 12 when a side collision occurs, so as to achieve the effect of improving the safety of the battery pack 12.

[0085] Based on the above overall introduction, specifically, it is still Figure 3As shown, in this embodiment, the torsion boxes 7 on both sides are in a "human" shaped structure, the front end of each torsion box 7 is connected to 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 to the front end of the door sill beam 2, and the other side is connected to the cabin rear section cross beam 8. In specific implementation, the above-mentioned torsion box 7 can adopt a conventional structure in existing vehicle models, and it is usually connected to the front cabin longitudinal beam 4, the door sill beam 2 and the cabin rear section cross beam 8 by welding.

[0086] The cabin rear cross beam 8 is specifically connected to the front end of the front floor panel 3 and is located at the bottom of the front floor panel 3, and the cabin rear cross beam 8 is also arranged across the middle channel 11 at the bottom to achieve the connection between the torsion boxes 7 on both sides. In specific implementation, the cabin rear cross beam 8 of this embodiment can adopt a beam structure commonly used in existing models, and it can be, for example, a sheet metal welding structure, or can also be made of extruded aluminum.

[0087] Continue to combine Figures 4 to 7 As shown in FIG. 1 , as a preferred implementation form, the rear floor assembly 1 of this embodiment comprises a rear floor frame 100 and a rear floor panel 200 covering the rear floor frame 100 .

[0088] The rear floor frame 100 has rear floor longitudinal beams 101 disposed on both sides and a rear floor middle cross beam 102 connected between the rear floor longitudinal beams 101 on both sides. The rear floor longitudinal beams 101 on each side are connected to the rear end of the door sill beam 2 on the same side, and the rear floor lower cross beam 6 is connected between the front sections 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 lower cross beam 6 of the rear floor between the front sections 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 position of the rear floor assembly 1 can be increased, and the stability of the installation of the rear end of the battery pack or the fuel tank in the vehicle body can be improved. At the same time, the structural strength of the rear floor frame 100 can also be increased, which helps to improve the overall torsional rigidity of the rear floor assembly 1.

[0090] It should be noted that, in this embodiment, the rear floor frame 100 may be, for example, a conventional sheet metal welding structure. However, as a preferred implementation form, the rear floor frame 100 may also be integrally formed, and specifically prepared by an integral thermoforming process. In this way, the rear floor frame 100 can be formed more easily, the number of parts and welding procedures can be reduced, and the structural strength of the rear floor frame 100 can also be ensured.

[0091] One-piece hot forming is a molding process frequently used in existing car body manufacturing. It usually involves heating the steel plate to make it evenly austenitized, and then sending it into a mold with an internal cooling system for stamping and molding. Finally, by cooling, the austenite is transformed into martensite, etc., to complete the molding process. Through the above molding process, the prepared car body parts can be hardened, thereby greatly improving their strength.

[0092] In particular, in the specific implementation, it is also preferred to adopt a laser welding hot forming process, that is, before the hot stamping forming process, the plates of different materials, plate thicknesses, and coatings are assembled and welded to form an integral plate by laser welding technology. Then, the integral plate is hot stamped to prepare the rear floor frame 100. Laser welding can solve the requirements for process performance of ultra-wide plates and different parts of the rear floor frame 100, and has a good effect in reducing the weight of the vehicle body, reducing the cost of the whole vehicle, and saving energy and environmental protection.

[0093] In this embodiment, as a preferred implementation form, the rear floor frame 100 further includes a rear floor front cross beam 103. The rear floor front cross beam 103 is connected between the front sections 101a of the rear floor longitudinal beams 101 on both sides, and the rear floor front cross beam 103, the rear floor middle cross beam 102 and the rear floor longitudinal beams 101 on both sides are connected to form an annular structure. At this time, the rear floor front cross beam 103 is provided, and the rear floor front cross beam 103, the rear floor middle cross beam 102 and the rear floor longitudinal beams 101 on both sides are connected to form an annular structure, which can further improve the structural strength of the rear floor frame 100 by utilizing the high strength of the annular structure.

[0094] In addition to the rear floor front cross beam 103, in this embodiment, the rear floor frame 100 also has a rear floor rear cross beam 104. 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 also specifically connected to the transition area between the front section 101a and the rear section 101b of the rear floor longitudinal beams 101 on each side, so that the rear floor front cross beam 103 and the rear floor rear cross beam 104 are respectively 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 rear floor longitudinal beams 101 on both sides are also connected to form an annular structure. In this way, by providing 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 rear floor longitudinal beams 101 on both sides to form an annular structure, the rigidity of the rear floor frame 100 can be better improved by using a double annular structure based on the annular 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 frame 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. By covering the top of the rear floor longitudinal beam 101 with the longitudinal beam cover plate 200a, a longitudinal beam cavity can be formed inside the rear floor longitudinal beam 101 to utilize the high strength of the cavity structure 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 beam cavity can also be formed at the rear floor middle beam 102 and the rear floor rear beam 104. At the rear floor front beam 103, a rear floor front beam reinforcement plate 300 can be further arranged. The rear floor front beam reinforcement plate 300 is connected between the rear door sill beams 2a on both sides, and it also forms a cavity structure with the rear floor front beam 103, the rear floor panel 200, etc., to increase the structural strength of the rear floor front beam 103.

[0098] In this embodiment, the rear end of each side sill beam 2 has a rear sill beam 2a, and each side sill beam 2 is connected to the rear floor longitudinal beam 101 on the same side through the rear sill beam 2a. Moreover, as the rear end portion of the sill beam 2, the rear sill beam 2a mainly functions to connect with the rear floor longitudinal beam 101 and the C-pillar, etc., and in terms of specific structure, the rear end of the rear sill beam 2a is usually connected to the rear floor longitudinal beam 101, the longitudinal beam cover 200a, and the front end of the rear wheel housing, etc., so as to form a stable structure.

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

[0100] In this embodiment, the rear floor lower cross beam 6 is in a "C" shape with an opening facing forward, and the structure of the rear floor lower cross beam 6 is as follows: Figure 8 As shown, for the convenience of description, the "C"-shaped rear floor lower cross beam 6 can be divided into lower cross beam side portions 6a on the left and right sides, and a lower cross beam middle portion 6b in the middle. The lower cross beam side portions 6a on both sides are mainly connected to the front sections 101a of the rear floor longitudinal beams 101 on both sides, and the rear door sill beams 2a on both sides, and the lower cross beam middle portion 6b in the middle is mainly connected to 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, continue as follows Fig. 9As shown in FIG. 1 , taking one side as an example, in this embodiment, a longitudinal beam front section cavity M is also formed between each side front section 101a, the rear sill beam 2a and the rear floor panel 200, and a lower cross beam side cavity N is formed between each side front section 101a, the rear sill beam 2a and the rear floor lower cross beam 6. The longitudinal beam front section cavity M and the lower cross beam side cavity N are stacked in the vertical direction of the vehicle.

[0102] At this time, by forming a longitudinal beam front section cavity M and a lower cross beam side cavity N stacked up and down, a double cavity structure can be utilized to increase the structural strength of both sides of the front portion of the rear floor assembly.

[0103] Based on the above longitudinal beam front section cavity M and lower cross beam side cavity N, in this embodiment, preferably, continue as follows Fig.10 As shown, a middle cross beam cavity S is formed between the rear floor middle cross beam 102 and the rear floor panel 200. At the same time, a lower cross beam middle cavity T is formed between the rear floor lower cross beam 6 and the rear floor middle cross beam 102. The middle cross beam cavity S and the lower cross beam middle cavity T are also stacked in the upper and lower directions of the vehicle.

[0104] In this way, by forming a middle cross beam cavity S and a lower cross beam middle cavity T which are also stacked up and down, the double cavity structure can also be utilized to increase the structural strength of the middle front position of the rear floor assembly. 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 part of the vehicle body.

[0105] In this embodiment, Figure 1 Combined with Fig.11 , Fig.12 As shown in FIG, a reinforcing plate 9 extending along the front-rear direction of the vehicle is provided on the side of the sill beams 2 on both sides facing the vehicle interior. The front end of each side reinforcing plate 9 is connected to the front cabin longitudinal beam 4 on the same side through the front enclosure longitudinal beam 10a, and the rear end of each side reinforcing plate 9 is connected to the rear floor longitudinal beam 101 on the same side. In addition, each side reinforcing plate 9 is also overlapped on the sill beam 2 on the same side at one side, and connected to the front floor panel 3 at the other side, 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 arranging a reinforcement plate 9 on the inner side of the sill beam 2, and forming a reinforcement plate cavity W between the sill beam 2, the reinforcement plate 9 and the front floor panel 3, the added reinforcement plate 9, especially the high structural strength of the formed cavity, can be utilized to increase the structural strength of the sill beam 2, thereby improving the overall structural strength of the middle part of the vehicle body, which is beneficial to improving the collision response capability of the entire vehicle.

[0107] In specific implementation, the cross-section of the reinforcing plates 9 on each side is roughly "L"-shaped, and can be a stamped sheet metal part. Moreover, a flange structure can be formed on the side of each reinforcing plate 9 close to the front floor panel 3, so as to better connect with the front floor panel 3. At the same time, the reinforcing plate 9 and the door sill beam 2 and the front floor panel 3 can be connected by spot welding.

[0108] It is worth noting that the above-mentioned front wall longitudinal beam 10a of the present embodiment can be integrally formed at the bottom of the front wall panel 10, that is, the front wall longitudinal beam 10a bulges upward at the bottom of the front wall panel 10 by stamping when the front wall panel 10 is prepared. Of course, in addition to being integrally formed by the front wall panel 10, the corresponding beam structure can also be welded to the front wall panel 10 to form each front wall longitudinal beam 10a.

[0109] In addition, it should be noted that the front cabin longitudinal beam 4 and the front wall longitudinal beam 10a can be regarded as being disposed on the front and rear sides of the front wall panel 10, and the reinforcing plate 9 and the rear floor longitudinal beam 101 are also disposed on the front and rear sides of the front cross beam reinforcing plate 300 of the rear floor. Therefore, the connection setting between the front wall longitudinal beam 10a and the front cabin longitudinal beam 4 on the same side, that is, the projections of the front wall longitudinal beam 10a and the front cabin longitudinal beam 4 on the same side in the front and rear direction of the whole vehicle at least partially overlap. Similarly, the rear end of the reinforcing plate 9 on the same side is connected with the rear floor longitudinal beam 101, that is, the projections of the two in the front and rear direction of the whole vehicle at least partially overlap. Through the overlap of the projections along the front and rear direction of the whole vehicle, it is possible to form a front-to-back connected force transmission channel between the front wall longitudinal beam 10a and the front cabin longitudinal beam 4, and between the reinforcing plate 9 and the rear floor longitudinal beam 101 when the vehicle collides, so as to be used for the transmission and dispersion of the collision force.

[0110] In this embodiment, a front row seat installation beam 5 is connected between the two side sill beams 2, and the front row seat installation beams 5 are also specifically two arranged at intervals along the front-to-back direction of the vehicle. In addition, both left and right ends of each front row seat installation beam 5 are connected to the sill beam 2 through a reinforcing plate 9. At the same time, each front row seat installation beam 5 of this embodiment can be set as a two-section structure, that is, each front row seat installation beam 5 is divided into two left and right sections by a central channel 11, one end of each section is connected to the central channel 11, and the other end is connected to the sill beam 2.

[0111] Or, as a preferred embodiment, see Figure 1 In this embodiment, each front row seat mounting cross beam 5 may also be connected from the threshold beam 2 on one side to the threshold beam 2 on the other side. At this time, it can be understood that making each front row seat mounting cross beam 5 a through structure can ensure the continuity of the force transmission channel formed by the front row seat mounting cross beam 5, which is conducive to improving the side impact force transmission capacity.

[0112] In addition, in addition to connecting the ends of the front row seat mounting cross beams 5 to the threshold beam 2 through the reinforcing plate 9, in specific implementation, on the basis of being able to connect to the threshold beam 2 through the reinforcing plate 9, this embodiment can further allow the ends of the front row seat mounting cross beams 5 to penetrate the reinforcing plate 9 and be directly connected to the threshold beam 2. In this way, the connection strength between the front row seat mounting cross beams 5 and the threshold beam 2 can be increased, and the Y-direction (left-right direction of the whole vehicle) structural reinforcement effect of the vehicle body after the front row seat mounting cross beams 5 are provided is improved.

[0113] As a preferred implementation form, combined with Fig.13 As shown in , the front seat installation beam 5 of this embodiment can be integrally formed by a rolling process, and in terms of structure, the front seat installation beam 5 is also configured to have a plurality of beam bodies 5a sequentially connected along the front-rear direction of the vehicle. The cross section of each beam body 5a is in a "J" shape.

[0114] At this time, the front seat mounting cross beam 5 is formed by a rolling process, and the front seat mounting cross beam 5 is composed of a plurality of cross beam bodies 5a with a cross section in the shape of a "J". This can increase the structural strength of the front seat mounting cross beam 5 itself, help improve the stability of the front seat setting, and also help improve the torsional stiffness of the middle part of the vehicle body, as well as the collision force transmission effect of the front seat mounting cross beam 5.

[0115] In this embodiment, a seat mounting bracket 501 is respectively provided on each front seat mounting crossbeam 5, and the seat mounting bracket 501 is arranged in a plurality of intervals along the left and right directions of the vehicle, and in particular, still refer to Fig.12 As shown, seat mounting brackets 501 are provided at the positions where the front seat mounting cross beam 5 intersects with the reinforcement plates 9 on both sides. In this way, by providing the seat mounting brackets 501 at the positions where the front seat mounting cross beam 5 intersects with the reinforcement plates 9, the reinforcing effect of the seat mounting brackets 501 can be utilized to form a stop wall position for side collision, so that the outer part of the stop wall position can fully collapse and absorb energy, thereby improving the safety of the inner battery pack.

[0116] It should be noted that, in addition to the left and right sides being mounted on the sill beam 2 through the mounting ears 13, the front end of the battery pack 12 of this embodiment can usually be connected to the rear cross beam 8 of the cabin and the torsion boxes 7 on both sides, while the rear end of the battery pack 12 can be connected to the rear floor lower cross 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 can not only realize the installation arrangement of the battery pack 12 in the vehicle body, but also can utilize the annular structure formed by each beam body and the torsion box 7 to improve the reliability of the installation of the battery pack 12.

[0117] In specific implementation, the installation points of the battery pack 12 located on the lower cross beam 6 of the rear floor, the torsion box 7 and the cross beam 8 of the rear section of the cabin can generally adopt conventional installation structure forms such as threaded sleeves or projection welding nuts.

[0118] Continue as Figures 14 to 20 As shown in , as a preferred implementation form, in this embodiment, nut plates 14 are provided on the sill beams 2 on both sides, and the mounting ears 13 on each side have a first part 1301 connected to the battery pack 12, and a second part 1302 connected to the outside of the first part 1301. At this time, the outside of the first part 1301, that is, along the left-right direction of the vehicle, the side of the first part 1301 close to the outside of the vehicle. And, still in the left-right direction of the vehicle, in the direction pointing to the outside of the vehicle, the second part 1302 in this embodiment is also set downward.

[0119] In addition, the sill beams 2 on each side are adapted to be arranged on the second portion 1302 on the same side and abut against the second portion 1302 on the same side. At the same time, the second portion 202 on each side is connected to the nut plate 14 on the same side by means of the connecting bolts 16 passing through the second portion 202 itself.

[0120] It is understandable that the mounting ear 13 on the side of the battery pack 12 has a connected first part 1301 and a second part 1302, and the second part 1302 is set to be tilted downward, and the door sill beam 2 is adapted to the second part 1302. In this way, the present embodiment utilizes the tilted design of the second part 1302 in the mounting ear 13, so that the mounting ear 13 can be fully crushed in the event of a side collision to absorb the collision energy, and the mounting ears 13 on each side form the side collision energy absorption structure. Of course, through the downward tilt of the second part 1302, the present embodiment can also make the battery pack 12 slide downward in the event of a side collision, thereby preventing the battery pack 12 from being squeezed and collided by the vehicle body structure, thereby also improving the safety of the battery pack 12.

[0121] As a preferred implementation form, in this embodiment, in the left-right direction of the vehicle, in the direction pointing outward from the vehicle, the first part 1301 is also arranged to be inclined upward. At this time, by making the first part 1301 inclined upward, it can be matched with the downward design of the second part 1302, so that the mounting lug 13 as a whole has a better crushing energy absorption effect.

[0122] Still see Fig.18 As shown, in terms of specific structure, as a preferred implementation form, each side mounting ear 13 also has a plurality of plates 13a arranged at intervals along the upper and lower directions of the vehicle, and each plate 13a extends from the second part 1302 to the first part 1301 and is connected to the battery pack 12.

[0123] At this point, it can be understood that the mounting ear 13 has multiple plates 13a spaced apart from each other, and each plate 13a extends until it is connected to the battery pack 12, so that each plate 13a can form a force transmission channel along the Y direction of the vehicle (i.e., the left and right direction of the vehicle), thereby facilitating the transmission and dispersion of the collision force to the battery pack 12 frame, so as to reduce the impact damage caused by the collision while crushing and absorbing energy. When a side collision occurs, the transmission of the collision force by the force transmission channel formed by each plate 13a in the mounting ear 13 can be seen again in Fig.18 shown.

[0124] On the basis of the plurality of plates 13a arranged at intervals in the mounting ear 13, as a preferred implementation form, a reinforcing rib 13b is also connected between two adjacent plates 13a in this embodiment, and the reinforcing rib 13b separates a plurality of ear cavities Q between two adjacent plates 13a. At this time, by providing reinforcing ribs 13b between adjacent plates 13a and separating the ear cavities Q by the reinforcing ribs 13b, it is obvious that the structural strength of the mounting ear 13 can be increased to ensure the reliability of the installation of the battery pack 12. At the same time, it can be understood that by utilizing the improvement of the structural strength of the mounting ear 13, of course, it can also improve the energy absorption capacity of the mounting ear 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 this embodiment, the mounting lug 13 can be formed by machining or casting, and can be connected to the side of the battery pack 12 by screwing, welding, etc. However, in the specific implementation, as a preferred implementation form, the side of the battery pack 12 of this 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 extruded as a whole.

[0126] In this way, the mounting ears 13 on each side are extruded integrally with the side beams 1201 on the sides of the battery pack 12, which can facilitate the preparation of the mounting ears 13 and the connection with the battery pack 12, and can also ensure the structural strength of the mounting ears 13 themselves and the connection strength between them and the battery pack 12.

[0127] In addition, based on the extrusion molding, the side beam 1201 of this embodiment is hollow inside, and as a preferred implementation form, a plurality of spaced reinforcing ribs are also arranged inside the side beam 1201. The above-mentioned reinforcing ribs can be spaced along the vertical direction of the vehicle, and further, from the cross-section of the side beam 1201 and the mounting lug 13, in this embodiment, 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 providing various 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. Similarly, arranging one of the reinforcing ribs along the extension line of the plate body 13a is also beneficial to the continuity of the collision force transmission channel formed between the plate body 13a and the side beam 1201, thereby enhancing the transmission and dispersion effect of the collision force at the side beam 1201.

[0129] In a specific implementation, the number of reinforcing ribs inside the side beam 1201 can be, for example, two, and they are respectively referred to as the first reinforcing rib 1201a and the second reinforcing rib 1201b. At the same time, the number of plates 13a in the mounting lug 13 can also be specifically three arranged in an upper and lower interval. Fig.18 As shown, they are arranged along the extension line of the plate body 13 a in the middle to form a through force transmission channel between the mounting lugs 13 and the side beams 1201 .

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

[0131] In this embodiment, Fig.17 and Fig.18 As shown, as a preferred implementation form, along the direction pointing to the second part 1302, the thickness of the first part 1301 along the vertical direction of the whole vehicle is gradually reduced, and along the direction pointing to the first part 1301, the thickness of the second part 1302 along the vertical direction of the whole vehicle is gradually increased. At this time, the thickness of the first part 1301 along the direction pointing to the second part 1302 is gradually reduced, and the thickness of the second part 1302 along the direction pointing to the first part 1301 is gradually increased, which also makes the cross-sectional thickness of the middle position between the connection point between the mounting ear 13 and the door sill beam 2 and the root of the mounting ear 13 smaller, so as to facilitate the bending of the mounting ear during a side collision, and facilitate the collapse of the mounting ear 13, so as to better achieve crushing energy absorption.

[0132] In this embodiment, since the mounting lug 13 is made of extruded aluminum, Fig.16As shown, in order to facilitate the connection of the mounting ear 13 with the nut plate 14 on the door sill beam 2 through the connecting bolt 16, a mounting sleeve 15 can also be provided on the mounting ear 13 during specific implementation. The mounting sleeve 15 is inserted into the mounting ear 13 and can be fixedly connected to the mounting ear 13 by welding. When the battery pack 12 is assembled, the connecting bolt 16 is passed through the mounting sleeve 15 and then screwed to the nut plate 14.

[0133] Continue to see Figures 19 to 22 As shown in , as a preferred implementation form, the nut plate 14 of this embodiment has a bottom plate 1401 and a welding nut 1402 arranged on the bottom plate 1401, and a mounting hole 201 arranged corresponding to the nut hole 1402a of the welding nut 1402 is also provided on the door sill beam 2. The mounting hole 201 is specifically a long hole extending in the left-right direction of the vehicle. At the same time, the bottom plate 1401 is also connected to the crush plate 1401a through a deformable connecting portion 1401b. The above-mentioned welding nut 1402 is connected to the crush plate 1401a, and when the connecting portion 1401b is deformed, the welding nut 1402 can move relative to the bottom plate 1401 along the length direction of the mounting hole 201.

[0134] At this time, by making the nut plate 14 composed of the base plate 1401 and the welding nut 1402, the mounting hole 201 is in the shape of a long strip arranged along the left and right direction of the vehicle, and the welding nut 1402 can move relative to the base plate 1401 along the length direction of the mounting hole 201, it can realize the collapse displacement of the mounting point of the battery pack 12 when a side collision occurs, thereby helping to reduce the collision impact on the battery pack 12 and improve the safety of the battery pack 12.

[0135] In detail, for the nut plate 14, the bottom plate 1401 can be preferably connected to the door sill beam 2 by spot welding, and as an exemplary structural form, the present embodiment is provided with a through hole 1401c on the bottom plate 1401, and the above-mentioned crush plate 1401a is located in the above-mentioned through hole 1401c. The crush plate 1401a is located at the two ends in the length direction of the installation hole 201 (i.e., the left and right direction of the whole vehicle), one end of which is connected to the bottom plate 1401 through the connecting portion 1401b, and the other end forms a crush deformation zone t with the inner wall of the through hole 1401c.

[0136] It can be understood that the crush plate 1401a is set in the through hole 1401c on the base plate 1401, and one end of the crush plate 1401a is connected to the base plate 1401 through the connecting portion 1401b, and the other end forms a crush deformation zone t, which helps to simplify the structure of the nut plate 14 and can limit the movement distance of the crush plate 1401a with the welding nut 1402, so as to ensure the use effect of the nut plate 14 when it collapses.

[0137] In this embodiment, as a preferred implementation form, still combined with Fig. 22 As shown, one side of the through hole 1401c also forms an opening K that penetrates 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 connecting portions 1401b that are arranged oppositely at the opening K. In addition, each connecting portion 1401b of this embodiment is also connected to the bottom plate 1401 through a connecting arm 1401d, and in the front-to-back 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. Moreover, the gaps e on both sides are connected to the crush deformation space t.

[0138] At this time, the two connecting parts 1401b are arranged relatively at the opening K, which can ensure the reliability of the connection between the crush plate 1401a and the bottom plate 1401. By setting the connecting arm 1401d, a gap e is provided between the front and rear sides of the crush plate 1401a and the inner wall of the through hole 1401c. This embodiment is not only conducive to the movement of the crush plate 1401a in the Y direction (left and right direction of the whole vehicle), but also has a certain mobility in the X direction (front and rear direction of the whole vehicle), thereby helping to improve the safety of the battery pack 12 in the event of a head-on collision or a rear-end collision.

[0139] It is worth noting that, in specific implementation, the connection portion 1401b of this embodiment can be, for example, a curved connection plate. In a natural state, the connection plate is curved, and the arrangement of the crush plate 1401a in the bottom plate 1401 is realized. When the vehicle is hit sideways, the sill beam 2 is subjected to force, and the collision force is transmitted to the crush plate 1401a via the connection bolt 16 connected to the welding nut 1402. Then, the crush plate 1401a pulls the connection portion 1401b, so that the curved connection portion 1401b can be deformed, and at the same time, the crush plate 1401a compresses the above-mentioned crush deformation zone t, thereby realizing the crushing function of the battery pack 12 installation point.

[0140] It is understandable that in this embodiment, the connection portion 1401b adopts a curved connection plate, which not only has the advantages of simple structure and easy preparation and molding, but also has a good collapse deformation effect. Moreover, in specific implementation, of course, in addition to using a curved connection plate located at the opening K, the connection portion 1401b can also be set at other positions, for example, the connection portion 1401b consisting of a curved connection plate is respectively set at the gap e on the front and rear sides of the collapse plate 1401a, which is also possible.

[0141] This embodiment is still Fig.17As shown in , for the mounting ears 13 on both sides, when the vehicle has a side collision, the decomposition force of the lateral impact force F along the normal direction of the mounting surface of the mounting ear 13 is F2, and the component force F2 generates a torque with a lever arm L around the root of the mounting ear 13, thereby causing the mounting ears 13 on the side of the battery pack 12 to deform and collapse to absorb the collision energy, thereby reducing the damage to the internal structure of the battery pack 12 and the like caused by the side collision, thereby improving the safety of the battery pack 12.

[0142] Of course, the annular structure formed by the lower cross beam 6 of the rear floor, the rear cross beam 8 of the cabin, the door sill beams 2 on both sides and the torsion box 7 can not only reduce the amount of side collision intrusion into the battery pack 12, but also transmit and disperse the side collision force to reduce the damage caused by the collision.

[0143] In the event of a head-on collision, Fig.23 As shown, the collision force is transmitted backwards from the front cabin longitudinal beam 4. At the rear end of the front cabin, the collision force can be transmitted laterally (in the left-right direction of the whole vehicle) through the rear section cross beam 8 of the cabin. In the middle of the vehicle body, the collision force can be transmitted backwards along the sill beams 2 on both sides, and can also be transmitted laterally by using the front seat installation cross beam 5. At the rear of the vehicle body, the collision force from the sill beam 2 can not only be transmitted longitudinally (in the front-to-back direction of the whole vehicle) and laterally at the rear floor frame 100, but can also be transmitted by using the rear floor lower cross beam 6.

[0144] In this way, through the transmission and dispersion of the front cabin longitudinal beam 4, the torsion box 7, the cabin rear section cross beam 8, the door sill beam 2, the rear floor frame 100 and the rear floor lower cross beam 6, it is also possible to absorb and eliminate the collision force to improve the collision safety of the vehicle.

[0145] The vehicle body of the present embodiment is such that the lower cross beam 6 of the rear floor, the rear cross beam 8 of the cabin, and the door sill beams 2 and the torsion box 7 on both sides are connected to form an annular structure, and the mounting lugs 13 can collapse along the left and right directions of the entire vehicle, thereby forming a side impact energy absorption structure located on the left and right sides of the battery pack 12. Therefore, the vehicle body of the present embodiment can not only utilize the formed annular structure to strengthen the vehicle body, improve the structural strength and torsional rigidity of the bottom of the vehicle body, and prevent the battery pack 12 from being squeezed and deformed during a collision, but also utilize the collapsing energy absorption of the mounting lugs 13 during a side collision to mitigate the collision impact on the battery pack 12, which is beneficial to improving the safety of the battery pack 13 and has great practicality.

[0146] Embodiment 2

[0147] This embodiment relates to a vehicle, which has the body of the vehicle in Embodiment 1. Moreover, the vehicle in this embodiment is provided with the body in Embodiment 1, and the body can be strengthened by using the formed annular structure, so as to prevent the battery pack 12 from being squeezed and deformed during a collision, and can also reduce the collision impact on the battery pack 12 during a side collision, which is beneficial to improving the collision safety of the battery pack 12 and has good practicality.

[0148] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle body, characterized in that: It comprises a lower body (1000), and a battery pack (12) connected to the bottom of the lower body (1000); The lower vehicle body (1000) comprises a rear floor lower cross beam (6) located at the bottom of the rear floor assembly (1), sill beams (2) arranged on the left and right sides, and a torsion box (7) respectively connected to the rear ends of the left and right front cabin longitudinal beams (4); A rear section cross beam (8) of the cabin is provided between the torsion boxes (7) on both sides, and the lower cross beam (6) of the rear floor, the rear section cross beam (8) of the cabin, the door sill beams (2) on both sides and the torsion boxes (7) are connected to form an annular structure; The battery pack (12) is arranged in the annular structure, and mounting ears (13) are provided on both left and right sides of the battery pack (12), the mounting ears (13) on each side are connected to the door sill beam (2) on the same side, and the mounting ears (13) on both sides can collapse along the left and right directions of the entire vehicle to form a side impact energy absorption structure located on the left and right sides of the battery pack (12).

2. The vehicle body according to claim 1, characterized in that: The rear floor assembly (1) comprises a rear floor frame (100) and a rear floor panel (200) covering the rear floor frame (100); The rear floor frame (100) comprises 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; The rear floor longitudinal beam (101) on each side is connected to the door sill beam (2) on the same side, the rear floor lower cross beam (6) is in a "C" shape with its opening facing forward, and the rear floor lower cross beam (6) is connected between the front sections (101a) of the rear floor longitudinal beams (101) on both sides and the rear floor middle cross beam (102).

3. The vehicle body according to claim 2, characterized in that: The rear floor frame (100) also 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 to the transition area between the front section (101a) and the rear section (101b) of the rear floor longitudinal beams (101) on each side; The front cross beam (103) of the rear floor, the middle cross beam (102) of the rear floor and the longitudinal beams (101) of the rear floor on both sides are connected to form a ring structure, and the rear cross beam (104) of the rear floor, the middle cross beam (102) of the rear floor and the longitudinal beams (101) of the rear floor on both sides are connected to form a ring structure.

4. The vehicle body according to claim 3, characterized in that: The rear ends of the sill beams (2) on both sides are provided with rear sill beams (2a), and the rear sill beams (2a) on each side are connected to the rear floor longitudinal beams (101); A longitudinal beam front cavity (M) is formed by enclosing between the front section (101a), the rear sill beam (2a), and the rear floor panel (200) on each side, and a lower beam side cavity (N) is formed by enclosing between the front section (101a), the rear sill beam (2a), and the lower cross beam of the rear floor (6) on each side; The longitudinal beam front cavity (M) and the lower beam side cavity (N) are stacked in the up and down direction of the whole vehicle.

5. The vehicle body according to claim 4, wherein: A middle cross beam cavity (S) is formed by enclosing between the middle cross beam of the rear floor (102) and the rear floor panel (200); A lower cross beam middle cavity (T) is formed by enclosing between the lower cross beam of the rear floor (6) and the middle cross beam of the rear floor (102); The middle cross beam cavity (S) and the lower cross beam middle cavity (T) are stacked in the up and down direction of the whole vehicle.

6. The vehicle body according to claim 1, wherein: Reinforcing plates (9) extending in the front and rear direction of the whole vehicle are provided on the inner side of the sill beams (2) on both sides facing the vehicle interior; The front end of each reinforcing plate (9) is connected to the front engine compartment longitudinal beam (4) on the same side through the front enclosure 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; Each reinforcing plate (9) overlaps on one side with the sill beam (2) on the same side and is connected to the front floor panel (3) on the other side, and a reinforcing plate cavity (W) is formed by enclosing between the sill beam (2), the front floor panel (3), and the reinforcing plate (9).

7. The vehicle body according to claim 6, wherein: A front row seat mounting cross beam (5) is connected between the sill beams (2) on both sides; Both the left and right ends of the front row seat mounting cross beam (5) are connected to the sill beam (2) through the reinforcing plate (9).

8. The vehicle body according to claim 7, wherein: The front row seat mounting cross beam (5) is integrally formed by a roll forming process, and the front row seat mounting cross beam (5) has a plurality of cross beam bodies (5a) connected in sequence in the front and rear direction of the whole vehicle, and the cross section of each cross beam body (5a) is in a "Ji" shape; and / or, Seat mounting brackets (501) are provided on the front row seat mounting cross beam (5), and the seat mounting brackets (501) are provided at the positions where the front row seat mounting cross beam (5) intersects with the reinforcing plates (9) on both sides.

9. The vehicle body according to any one of claims 1 to 8, wherein: Nut plates (14) are provided on the sill beams (2) on both sides, and each mounting lug (13) has a first part (1301) connected to the battery pack (12), and a second part (1302) connected to the outside of the first part (1301); In the left-right direction of the vehicle, along the direction pointing outward from the vehicle, the second part (1302) on each side is arranged downwardly, and the door sill beam (2) on each side is adapted to be arranged on the second part (1302) on the same side and abuts against the second part (1302) on the same side; The second part (1302) on each side is connected to the nut plate (14) on the same side by means of connecting bolts (16) passing through the second part (1302).

10. The vehicle body according to claim 9, characterized in that: In the left-right direction of the vehicle, in the direction pointing outward from the vehicle, the first part (1301) is arranged to be inclined upward; and / or, The mounting ear (13) comprises a plurality of plates (13a) arranged at intervals along the vertical direction of the vehicle, each of the plates (13a) extending from the second part (1302) to the first part (1301) and connected to the battery pack (12).

11. The vehicle body according to claim 9, characterized in that: The side 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, Along the direction pointing to the second part (1302), the thickness of the first part (1301) along the upper and lower directions of the whole vehicle is gradually set to be smaller, and along the direction pointing to the first part (1301), the thickness of the second part (1302) along the upper and lower directions of the whole vehicle is gradually set to be larger.

12. The vehicle body according to claim 9, characterized in that: The nut plate (14) has a bottom plate (1401) and a welding nut (1402) arranged on the bottom plate (1401), and the threshold beam (2) is provided with a mounting through hole (201) arranged corresponding to a nut hole (1402a) of the welding nut (1402); The mounting through hole (201) is a long hole extending in the left-right direction of the vehicle, the bottom plate (1401) is connected to a crush plate (1401a) via a deformable connecting portion (1401b), and the welding nut (1402) is connected to the crush plate (1401a); When the connecting portion (1401b) is deformed, the welding nut (1402) can move relative to the base plate (1401) along the length direction of the mounting through hole (201).

13. The vehicle body according to claim 12, characterized in that: 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 two ends of the mounting hole (201) in the length direction, one end of which is connected to the base plate (1401) through the connecting portion (1401b), and a collapse deformation space (t) is formed between the other end and the inner wall of the through hole (1401c).

14. The vehicle body according to claim 13, characterized in that: One side of the through hole (1401c) forms an opening (K) that penetrates to the outside of the bottom plate (1401), and the connecting parts (1401b) are located at the opening (K), and are two connecting parts that are arranged opposite to each other at the opening (K); Each of the connecting parts (1401b) is connected to the base plate (1401) via 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 connected to the crush deformation space (t).

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

Images