Vehicle body connecting structure and vehicle

Abstract

The utility model provides a vehicle body connecting structure and a vehicle, the vehicle body connecting structure is located at the end part of a battery pack frame integrated with a vehicle body, and comprises a first connecting bracket connected to the battery pack frame and a second connecting bracket arranged on an auxiliary frame in the vehicle body, the first connecting support is connected with the second connecting support, and a buffering cavity is formed between the first connecting support and the second connecting support. According to the vehicle body connecting structure, collision energy can be buffered and absorbed when the vehicle collides, the damage probability of the battery pack frame and the battery pack is reduced, then the safety of the battery pack can be improved, and therefore the safety quality and the market competitiveness of the whole vehicle can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle bodies, in particular to a vehicle body connection structure. Meanwhile, the utility model also relates to a vehicle provided with the vehicle body connection structure. Background Art

[0002] As the range of new energy vehicles has been greatly improved, the main concern that prevents consumers from buying new energy vehicles is no longer range, but safety. Although new energy vehicles do not catch fire and smoke as frequently as in the early years, this concern has not been completely dispelled for consumers. Because of this, various car companies are also focusing on improving the collision safety of new energy vehicles.

[0003] The power battery is the core component of new energy vehicles. To ensure its safety performance, there needs to be sufficient structure and space around the power battery for protection. However, when existing new energy vehicles are hit, especially head-on collisions, the structural strength and collision performance of the structure around the battery pack in the car body are poor. The battery pack is not well protected and is more likely to be damaged, which cannot meet safety design requirements. Utility Model Content

[0004] In view of this, the present invention aims to provide a method to improve the safety of a battery pack.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A vehicle body connection structure is located at the end of a battery pack frame integrated with the vehicle body, and includes a first connection bracket connected to the battery pack frame, and a second connection bracket provided on a subframe in the vehicle body, the first connection bracket is connected to the second connection bracket, and a buffer cavity is formed between the first connection bracket and the second connection bracket.

[0007] Furthermore, the first connecting bracket includes a first connecting plate arranged on the battery pack frame, and the second connecting bracket includes a second connecting plate arranged on the subframe; the first connecting plate is in a "J"-shaped structure open to one side of the second connecting bracket, and the second connecting plate is in a "J"-shaped structure open to one side of the first connecting bracket, and the first connecting plate and the second connecting plate are butt-jointed together, and the buffer cavity is formed between the first connecting plate and the second connecting plate.

[0008] Furthermore, a buffer component located in the buffer cavity is provided between the first connecting plate and the second connecting plate.

[0009] Furthermore, the buffer assembly includes a first rubber body provided on the first connecting plate, and a second rubber body provided on the second connecting plate, and the first rubber body is connected to the second rubber body.

[0010] Furthermore, the first rubber body is provided with a positioning protrusion, and the second rubber body is provided with a positioning groove, or the first rubber body is provided with a positioning groove, and the second rubber body is provided with a positioning protrusion; the positioning protrusion is inserted into the positioning groove.

[0011] Furthermore, the first connecting plate is connected to the end of the battery pack frame through a first connecting tube; and / or the second connecting plate is connected to the subframe through a mounting member, a second curved connecting tube is provided on one side of the mounting member, and the second connecting tube is connected to the second connecting plate.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] The vehicle body connection structure described in the utility model can form a buffer cavity between the first connection bracket and the second connection bracket to form a structure similar to an energy absorption box, which can buffer and absorb collision energy when the vehicle collides, reduce the probability of damage to the battery pack frame and the battery pack, and improve the safety of the battery pack, thereby being beneficial to improving the safety quality of the entire vehicle.

[0014] In addition, the first connecting plate is in a "J"-shaped structure with an opening toward one side of the second connecting bracket, and the second connecting plate is in a "J"-shaped structure with an opening toward one side of the first connecting bracket, which can improve the structural strength of the first connecting plate and the second connecting plate, facilitate the docking connection between the two, and form a buffer cavity to improve the protection effect of the battery pack. The setting of the buffer component can cooperate with the buffer cavity to further improve the buffering and energy absorption effect when the vehicle collides, thereby improving the safety of the battery pack.

[0015] In addition, the coordinated arrangement of the positioning protrusion and the positioning groove is conducive to improving the convenience of connection between the first rubber body and the second rubber body, and can ensure the accuracy of docking, thereby improving the buffering effect. By setting the first connecting tube and the second connecting tube, the cavity characteristics of the tube body can be used to improve the collision buffering effect, and the curved second connecting tube can also build a force transmission channel between the mounting part and the second connecting plate, improving the bending deformation bearing capacity and energy absorption characteristics, thereby improving the force dispersion and transmission effect between the first connecting bracket and the second connecting bracket.

[0016] Another object of the present utility model is to provide a vehicle, wherein the vehicle body is provided with a battery pack frame integrated with the vehicle body, and a front subframe;

[0017] The front subframe is connected to the front end of the battery pack frame through the vehicle body connection structure as described above.

[0018] Furthermore, the front subframe includes two front subframe longitudinal beams arranged opposite to each other on the left and right sides; the two front subframe longitudinal beams are connected to the end of the battery pack frame through the vehicle body connection structure on the corresponding side, and a front subframe cross beam is connected between the two front subframe longitudinal beams.

[0019] Furthermore, a front anti-collision beam mounting plate is provided at the front end of each front sub-frame longitudinal beam, and a support member is provided between each front sub-frame longitudinal beam and the corresponding front anti-collision beam mounting plate; in the left-right direction of the whole vehicle, the support member on each side is located on the side of the front sub-frame longitudinal beam on the same side facing outward from the vehicle.

[0020] Furthermore, the vehicle is provided with a rear subframe; the rear subframe includes two rear subframe longitudinal beams arranged opposite to each other on the left and right, and a rear subframe cross beam connected between the two rear subframe longitudinal beams, and the front ends of the two rear subframe longitudinal beams are connected to the rear end of the battery pack frame through buffer bushings.

[0021] The vehicle described in the utility model is provided with the above-mentioned body connection structure, which can buffer the collision energy and reduce the probability of damage to the battery pack, thereby improving the safety of the battery pack and thus improving the safety of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the vehicle body connection structure according to an embodiment of the utility model when it is assembled on a vehicle body;

[0024] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0025] Figure 3 This is a schematic diagram of the structure of the battery pack frame according to an embodiment of the utility model;

[0026] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0027] Figure 5 It is a structural schematic diagram of the second connecting bracket and the front sub-frame when they are assembled according to an embodiment of the utility model;

[0028] Figure 6 This is a schematic structural diagram of the second connecting bracket according to an embodiment of the utility model;

[0029] Figure 7 This is a structural schematic diagram of the first connecting bracket according to an embodiment of the utility model;

[0030] Figure 8 This is a schematic diagram of the structure of the vehicle body according to an embodiment of the utility model;

[0031] Fig. 9 It is a structural schematic diagram of the rear subframe according to an embodiment of the utility model;

[0032] Description of reference numerals:

[0033] 100. Buffer cavity;

[0034] 1. Battery pack frame; 11. First connecting bracket; 111. First connecting plate; 1111. First screw hole; 112. First rubber body; 1121. Positioning protrusion; 113. First connecting pipe; 1131. Mounting matching plate; 13. First connecting seat; 131. First mounting plate; 132. Reinforcement plate; 14. Second connecting seat;

[0035] 2. front subframe; 21. second connecting bracket; 211. second connecting plate; 2111. second screw hole; 212. second rubber body; 2121. positioning groove; 213. mounting member; 2131. second mounting plate; 214. second connecting pipe; 22. front subframe longitudinal beam; 23. front subframe cross beam; 24. front anti-collision beam mounting plate; 25. supporting member;

[0036] 3. Rear subframe; 31. Rear subframe longitudinal beam; 32. Rear subframe cross beam; 33. Buffer bushing. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0038] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, 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" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] Taking the vehicle in which the vehicle body connection structure described in the utility model is located as an example, the directional words such as "up, down, left, right, front, and back" used in the embodiment are defined based on the up and down direction (also known as the height direction, or the Z direction of the whole vehicle), the left and right direction (also known as the width direction, or the Y direction of the whole vehicle), and the front and rear direction (also known as the length direction, or the X direction of the whole vehicle). "Inside and outside" are defined based on the contour of the corresponding parts. For example, "inside" and "outside" are defined based on the contour of the vehicle, and the side of the vehicle contour close to the middle of the vehicle is "inside", and the opposite is "outside".

[0040] In addition, in the description of the present invention, unless otherwise clearly defined, 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 the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0041] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0042] Embodiment 1

[0043] The present embodiment relates to a vehicle body connection structure, which can act as a similar energy absorption box structure, and can buffer and absorb collision energy when the vehicle collides, so as to reduce the probability of damage to the battery pack frame 1 and the battery pack, thereby improving the safety of the battery pack.

[0044] In terms of overall structure, Figures 1 to 9 As shown, the vehicle body connection structure of the present embodiment is located at the end of a battery pack frame 1 integrated with the vehicle body, and includes a first connection bracket 11 connected to the battery pack frame 1, and a second connection bracket 21 provided on a subframe in the vehicle body, the first connection bracket 11 is connected to the second connection bracket 21, and a buffer cavity 100 is formed between the first connection bracket 11 and the second connection bracket 21.

[0045] At this time, as set above, the buffer cavity 100 can be formed to buffer and absorb the collision energy transmitted from the subframe to the battery pack frame 1, so that the risk of damage to the battery pack frame 1 and the battery pack is reduced, thereby improving the safety of the battery pack.

[0046] Based on the above overall introduction, in detail, when this embodiment is implemented, based on the spatial layout requirements of the vehicle body connection structure, the subframe is preferably a front subframe 2, and the front subframe 2 is connected to the front side beam of the battery pack frame 1.

[0047] In this embodiment, as a preferred implementation form, Figure 2 As shown, the first connecting bracket 11 includes a first connecting plate 111 disposed on the battery pack frame 1, and the second connecting bracket 21 includes a second connecting plate 211 disposed on the subframe.

[0048] Furthermore, the first connecting plate 111 is in a “J”-shaped structure that opens toward one side of the second connecting bracket 21, and the second connecting plate 211 is in a “J”-shaped structure that opens toward one side of the first connecting bracket 11, and the first connecting plate 111 and the second connecting plate 211 are butt-jointed together, and the buffer chamber 100 is formed between the first connecting plate 111 and the second connecting plate 211.

[0049] Here, the first connecting plate 111 is in a "J"-shaped structure that is open to one side of the second connecting bracket 21, and the second connecting plate 211 is in a "J"-shaped structure that is open to one side of the first connecting bracket 11. This can enhance the structural strength of the first connecting plate 111 and the second connecting plate 211, facilitate docking and connection between the two, and form a buffer cavity 100 to enhance the protection effect of the battery pack.

[0050] It is worth mentioning that, as mentioned above, the subframe of the present embodiment is preferably the front subframe 2. At this time, the opening of the first connecting plate 111 is arranged forward along the front-rear direction of the whole vehicle, and the opening of the second connecting plate 211 is arranged backward along the front-rear direction of the whole vehicle, so as to achieve docking between the two.

[0051] In specific implementation, as a preferred implementation form, a buffer component located in the buffer cavity 100 is provided between the first connecting plate 111 and the second connecting plate 211 of this embodiment. The buffer component can cooperate with the buffer cavity 100 to further improve the buffering energy absorption effect during vehicle collision, thereby improving the safety of the battery pack.

[0052] Combination Figure 2 , Figure 6 and Figure 7 As shown in the present embodiment, as a preferred implementation form, the buffer assembly includes a first rubber body 112 provided on the first connecting plate 111, and a second rubber body 212 provided on the second connecting plate 211, and the first rubber body 112 and the second rubber body 212 are directly connected to each other.

[0053] Furthermore, based on considerations of the buffering effect of the buffer assembly, in this embodiment, as a preferred implementation form, a positioning protrusion 1121 is provided on the first rubber body 112 , and a positioning groove 2121 is provided on the second rubber body 212 , and the positioning protrusion 1121 is inserted into the positioning groove 2121 .

[0054] The advantage of such a configuration is that it is conducive to improving the connection convenience between the first rubber body 112 and the second rubber body 212, and can ensure the accuracy of the docking between the two, thereby helping to improve the buffering energy absorption effect of the buffer assembly. In the specific structure, the positioning protrusion 1121 can be preferably set to a "cross" shape, and the positioning groove 2121 is adapted to the positioning protrusion 1121.

[0055] Of course, in this embodiment, in addition to providing the positioning protrusion 1121 on the first rubber body 112 and providing the positioning groove 2121 on the second rubber body 212, as a preferred implementation form, the positioning protrusion 1121 can be provided on the second rubber body 212, and the positioning groove 2121 can be provided on the first rubber body 112, which can also achieve the effect of facilitating the convenient connection between the first rubber body 112 and the second rubber body 212.

[0056] In addition, in this embodiment, as a preferred implementation form, see Figure 2 and Figure 7 As shown, the first connecting plate 111 is connected to the end of the battery pack frame 1 through the first connecting tube 113. The arrangement of the first connecting tube 113 can utilize the cavity characteristics of the tube body to enhance the buffering energy absorption effect.

[0057] When implementing it, Figure 3 , Figure 4 and Figure 7 As shown, the battery pack frame 1 is preferably provided with a first connecting seat 13, and the first connecting tube 113 is preferably provided with a mounting matching plate 1131 connected to the first connecting seat 13. Specifically, the first connecting seat 13 includes a U-shaped first mounting plate 131 that is snap-fitted to the front side beam of the battery pack frame 1, and a reinforcing plate 132 arranged in a cavity formed by the first mounting plate 131 and the front side beam. At this time, the mounting matching plate 1131 is also preferably set to a U-shape so as to adapt to and be screwed to the first mounting plate 131.

[0058] At the same time, Figure 2 and Figure 6 As shown, as a preferred implementation form, the second connecting plate 211 of this embodiment is connected to the sub-frame through a mounting member 213 , and a curved second connecting pipe 214 is provided on one side of the mounting member 213 , and the second connecting pipe 214 is connected to the second connecting plate 211 .

[0059] It can be understood that by setting up the second connecting tube 214, not only can the cavity characteristics of the tube body be utilized to enhance the buffering and energy absorption effect, but also the curved second connecting tube 214 can build a force transmission channel between the mounting member 213 and the second connecting plate 211, thereby enhancing the bending deformation bearing capacity and energy absorption characteristics, thereby enhancing the force dispersion and transmission effect between the first connecting bracket 11 and the second connecting bracket 21.

[0060] In specific implementation, Figure 6 As shown, the first connecting plate 111 and the second connecting plate 211 preferably include a base plate, side plates arranged at both ends of the base plate, and flanges arranged at one end of each side plate away from the base plate, wherein one end of the second connecting tube 214 away from the mounting member 213 is connected to the flange on the corresponding side of the second connecting plate 211.

[0061] In this embodiment, the first connecting plate 111 and the second connecting plate 211 are preferably connected via a screw structure, which is used, for example, to connect two opposite flanges of the first connecting plate 111 and the second connecting plate 211, and may include a first screw hole 1111 provided on the first connecting plate 111, a second screw hole 2111 provided on the second connecting plate 211, and bolts passing through the first screw hole 1111 and the second screw hole 2111.

[0062] At the same time, the above-mentioned mounting member 213 can be preferably configured to be tubular in order to reduce weight while having good structural strength, and the mounting member 213 can also be preferably provided with a second mounting plate 2131 for connecting to the sub-frame.

[0063] Furthermore, in this embodiment, the first connecting plate 111 and the second connecting plate 211 can be stamped by high-strength plate materials, the first rubber body 112 can be formed on the first connecting plate 111 by a vulcanization process, the second rubber body 212 can be formed on the second connecting plate 211 by a vulcanization process, and the first connecting seat 13 and the second connecting seat 14 can be integrally formed with the battery pack frame 1 by an aluminum alloy extrusion process.

[0064] In addition, it is worth mentioning that the vehicle body connection structure of the present embodiment, based on the "J"-shaped design of the first connecting plate 111 and the second connecting plate 211, and combined with the cooperation of the buffer component, has the function of acting as an energy absorption box. During a collision, it can absorb part of the energy through the yielding of its own structure, and resist part of the energy through tensile strength, so as to achieve the purpose of attenuating energy and absorbing buffering energy, and then transfer the collision energy.

[0065] Moreover, the coordinated use of the first rubber body 112 and the second rubber body 212 in the buffer assembly can utilize the elasticity and plasticity of the rubber material to allow each rubber body to store a large amount of energy when subjected to force and release the energy when unloading. During this period, a moment effect will occur, resulting in a hysteresis in the energy loss of each rubber body when unloading energy. This makes the buffer assembly not only play a good elastic role, but also a good damping material, especially suitable for isolating vibration and absorbing impact energy, thereby improving the collision buffering performance of the vehicle body connection structure.

[0066] The body connection structure of this embodiment can form a buffer cavity 100 between the first connection bracket 11 and the second connection bracket 21, forming a structure similar to an energy-absorbing box. During a vehicle collision, it can buffer and absorb the collision energy, reduce the probability of damage to the battery pack frame 1 and the battery pack, and improve the safety of the battery pack. Thus, it is beneficial to improve the overall safety quality of the vehicle.

[0067] Embodiment Two

[0068] This embodiment relates to a vehicle. In terms of the overall structure, as Figure 8 shown, the body of the vehicle is provided with a battery pack frame 1 integrated with the body, and a front subframe 2. The front subframe 2 is connected to the front end of the battery pack frame 1 through the body connection structure in Embodiment One.

[0069] Specifically, in this embodiment, as a preferred implementation form, in combination with Figure 5 and Figure 8 shown, the front subframe 2 includes two front subframe longitudinal beams 22 arranged relatively left and right. And both of the two front subframe longitudinal beams 22 are connected to the end of the battery pack frame 1 through the body connection structure on the corresponding side, and a front subframe cross beam 23 is connected between the two front subframe longitudinal beams 22.

[0070] It is worth mentioning that during specific implementation, the above front subframe cross beam 23 includes a front subframe front cross beam and a front subframe rear cross beam. Thus, a "day" - shaped structure can be formed among the front subframe front cross beam, the front subframe rear cross beam, the two front subframe longitudinal beams 22, the two body connection structures, and the front side beam of the battery pack frame 1, so that the front end of the body has greater axial stiffness, can absorb more energy during collision crushing, and has better axial crushing stability, thereby being beneficial to the overall collision performance of the body.

[0071] At the same time, to improve the collision performance of the rear end of the vehicle, in this embodiment, also as a preferred implementation form, a front anti - collision beam mounting plate 24 is provided at the front end of each front subframe longitudinal beam 22, and a support member 25 is provided between each front subframe longitudinal beam 22 and the corresponding front anti - collision beam mounting plate 24. In the left - right direction of the vehicle, each side support member 25 is located on the side of the同侧 front subframe longitudinal beam 22 facing away from the vehicle.

[0072] The setting of the above - mentioned support members 25 on each side can form another force transmission channel between the front subframe longitudinal beam 22 on the corresponding side and the front anti - collision beam mounting plate 24, thereby improving the dispersion and transmission effect of the collision energy transmitted from the anti - collision beam.

[0073] In addition, in this embodiment, as a preferred implementation form, in combination with Figure 8 and Fig. 9As shown in the figure, a rear subframe 3 is provided in the vehicle. The rear subframe 3 includes two rear subframe longitudinal beams 31 arranged oppositely on the left and right, and a rear subframe cross beam 32 connected between the two rear subframe longitudinal beams 31. The front ends of the two rear subframe longitudinal beams 31 are connected to the rear end of the battery pack frame 1 through buffer bushings 33.

[0074] With the above settings, the energy buffering effect between the rear subframe 3 and the battery pack frame 1 can be improved through the buffer bushings 33, thereby enhancing the protection effect on the battery pack. In specific implementation, the buffer bushings 33 can adopt rubber mount bushings or hydraulic mount bushings well-known to those skilled in the art.

[0075] Moreover, the rear subframe cross beam 32 in this embodiment preferably includes a front rear subframe cross beam and a rear rear subframe cross beam. Thus, a "day" - shaped structure can be formed by enclosing the front rear subframe cross beam, the rear rear subframe cross beam, the two rear subframe longitudinal beams 31 and the rear side beam of the battery pack frame 1, so that the rear end of the vehicle body has greater axial stiffness, can absorb more energy during collision crushing, and has better axial crushing stability, thereby being beneficial to the overall collision performance of the vehicle body.

[0076] In this embodiment, when the vehicle encounters a frontal collision, the frontal collision force F is first transmitted to the anti - collision beam and energy - absorbing box of the vehicle (the first force - transmission path), then dispersed to the front subframe 2, and then buffered and energy - absorbed through the "day" - shaped structure (the second force - transmission path) formed by enclosing the front rear subframe cross beam, the rear rear subframe cross beam, the two front subframe longitudinal beams 22, the two vehicle body connection structures and the front side beam of the battery pack frame 1;

[0077] Subsequently, the collision force F is transmitted to the battery pack frame beam for transmission and attenuation. After being crushed and energy - absorbed by the rear side beam of the battery pack frame 1 and the two buffer bushings 33, it is transmitted to the rear subframe 3. At this time, based on the "day" - shaped structure (the third force - transmission path) formed by enclosing the front rear subframe cross beam, the rear rear subframe cross beam, the two rear subframe longitudinal beams 31 and the rear side beam of the battery pack frame 1, the collision force F can be effectively buffered and energy - absorbed again, and finally transmitted to the rear anti - collision beam and other places for buffer and energy - absorption.

[0078] Moreover, it is worth mentioning that in specific implementation, this embodiment can change the dynamic and static stiffness distribution among the battery pack frame 1, the front subframe 2 and the rear subframe 3 through the combined design of the vehicle body connection structure and the buffer bushings 33, thereby realizing the change of the battery pack vibration frequency, avoiding resonance between the battery pack and design boundary systems such as the vehicle suspension, and improving the cycle life of the battery pack.

[0079] The vehicle in this embodiment, by setting the vehicle body connection structure in the first embodiment, can reduce the probability of damage to the battery pack, improve the safety of the battery pack, and thus is beneficial to improving the overall safety quality of the vehicle.

[0080] 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 principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle body connection structure, characterized in that: The vehicle body connection structure is located at the end of a battery pack frame (1) integrated with the vehicle body, and comprises a first connection bracket (11) connected to the battery pack frame (1), and a second connection bracket (21) provided on a subframe in the vehicle body, the first connection bracket (11) being connected to the second connection bracket (21), and a buffer cavity (100) being formed between the first connection bracket (11) and the second connection bracket (21).

2. The vehicle body connection structure according to claim 1, characterized in that: The first connecting bracket (11) comprises a first connecting plate (111) provided on the battery pack frame (1), and the second connecting bracket (21) comprises a second connecting plate (211) provided on the auxiliary frame; The first connecting plate (111) is in a "J"-shaped structure that is open toward one side of the second connecting bracket (21), and the second connecting plate (211) is in a "J"-shaped structure that is open toward one side of the first connecting bracket (11), and the first connecting plate (111) and the second connecting plate (211) are butt-jointed together, and the buffer cavity (100) is formed between the first connecting plate (111) and the second connecting plate (211).

3. The vehicle body connection structure according to claim 2, characterized in that: A buffer component located in the buffer cavity (100) is provided between the first connecting plate (111) and the second connecting plate (211).

4. The vehicle body connection structure according to claim 3, characterized in that: The buffer assembly comprises a first rubber body (112) arranged on the first connecting plate (111), and a second rubber body (212) arranged on the second connecting plate (211), wherein the first rubber body (112) is connected to the second rubber body (212).

5. The vehicle body connection structure according to claim 4, characterized in that: The first rubber body (112) is provided with a positioning protrusion (1121), and the second rubber body (212) is provided with a positioning groove (2121); or the first rubber body (112) is provided with a positioning groove (2121), and the second rubber body (212) is provided with a positioning protrusion (1121); The positioning protrusion (1121) is inserted into the positioning groove (2121).

6. The vehicle body connection structure according to any one of claims 2 to 5, characterized in that: The first connecting plate (111) is connected to the end of the battery pack frame (1) via a first connecting tube (113); and / or, The second connecting plate (211) is connected to the sub-frame via a mounting member (213); a second connecting pipe (214) in a curved shape is provided on one side of the mounting member (213); and the second connecting pipe (214) is connected to the second connecting plate (211).

7. A vehicle, characterized in that: The vehicle body is provided with a battery pack frame (1) integrated with the vehicle body, and a front subframe (2); The front subframe (2) is connected to the front end of the battery pack frame (1) via a vehicle body connection structure according to any one of claims 1 to 6.

8. The vehicle according to claim 7, characterized in that: The front subframe (2) comprises two front subframe longitudinal beams (22) arranged opposite to each other on the left and right sides; The two front sub-frame longitudinal beams (22) are connected to the ends of the battery pack frame (1) via the vehicle body connection structure on the corresponding side, and a front sub-frame cross beam (23) is connected between the two front sub-frame longitudinal beams (22).

9. The vehicle according to claim 8, characterized in that: A front anti-collision beam mounting plate (24) is provided at the front end of each front sub-frame longitudinal beam (22), and a support member (25) is provided between each front sub-frame longitudinal beam (22) and the corresponding front anti-collision beam mounting plate (24); In the left-right direction of the vehicle, the support member (25) on each side is located on the side of the front sub-frame longitudinal beam (22) on the same side facing outward from the vehicle.

10. The vehicle according to claim 7, characterized in that: The vehicle is provided with a rear subframe (3); The rear sub-frame (3) comprises two rear sub-frame longitudinal beams (31) arranged opposite to each other on the left and right, and a rear sub-frame cross beam (32) connected between the two rear sub-frame longitudinal beams (31), and the front ends of the two rear sub-frame longitudinal beams (31) are connected to the rear end of the battery pack frame (1) via buffer bushings (33).

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