New energy automobile body structure

Abstract

The invention belongs to a new energy automobile body structure in the technical field of new energy automobiles. The outer frame beam (4) and the lower bottom plate (5) are of an integrated structure made of aluminum alloy, a trapezoidal structure or a wedge-shaped structure is arranged on the outer side of the outer frame beam (4), a protruding part (10) of the threshold inner plate (9) abuts against the upper portion of the outer frame beam (4), an inner plate inclined face part (11) abuts against an outer frame inclined face part (7), a bolt bush (13) is arranged on the inner side of the inner plate inclined face part (11), and a threaded sleeve (14) is arranged on the inner side of the outer frame beam (4). A bolt (15) is connected with the threaded bushing (13) and the threaded sleeve (14), and an internal arrangement beam (6) is arranged in the lower shell (2) under the seat cross beam. According to the new energy automobile body structure, the structure is simple, the space utilization rate is increased, meanwhile, the bending torsion and collision performance of an automobile body is improved, meanwhile, the safety performance of side collision and side column collision is improved, and the torsional rigidity and the side collision performance of the automobile body are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicles, and more specifically, relates to a body structure of a new energy vehicle. Background Art

[0002] According to the current development trend of new energy vehicles, the battery life and charging speed of electric vehicles have become important evaluation criteria for the product strength of a vehicle model. In the current situation where there has been no significant breakthrough in electrochemical energy storage technology, the mainstream solutions to improve the battery life of electric vehicles mostly use methods such as optimizing battery cell packaging and improving the integrated structure of battery packs to achieve higher power storage capacity under the conditions of limited layout space of the entire vehicle. As a result, battery pack integration technology solutions such as CTC / CTB, which integrate batteries and bodies, have emerged. The existing CTB and CTC implementation plans have different disadvantages.

[0003] The current implementation plan of CTB (cel to bad) technology: the upper cover of the battery pack is used as the front floor of the vehicle body, and the front seat crossbeam adopts the traditional body structure and is welded to the body door sill. This solution reduces the front floor panel, and the Z-direction space of the battery pack is increased by about 10mm. However, the front seat crossbeam of this solution needs to be closed because the body side lacks a floor to meet the strength of the seat installation point and the side collision force transmission requirements.

[0004] The current implementation plan of CTC (Cell to Chassis) technology: It integrates the front seat crossbeam into the battery pack, and the front seat crossbeam and the upper cover of the battery pack are welded by resistance welding. In order to meet the strength of the seat installation point and the force transmission requirements of side collision, the front seat crossbeam uses high-strength rolled parts. In order to have sufficient side collision force transmission performance, more than 3 seat crossbeams will be arranged to connect with the upper cover of the battery. And polyurethane glue is injected into the entire battery pack to ensure the rigidity of the entire package structure and the connection between the upper cover of the battery pack and the package, so as to avoid the seat leaning forward to pull up the seat crossbeam and the upper cover of the battery pack when a collision occurs. This solution achieves a high degree of integration between the battery pack and the body structure, and effectively utilizes the upper cover of the battery pack and the battery cell shell structure. However, it uses polyurethane glue for filling and bonding, which makes the maintenance and recycling of the battery pack extremely difficult.

[0005] There is a technology named "A body structure and new energy vehicle" and the publication number is "CN117985127A" in the prior art. This technology provides a body structure and a new energy vehicle, which relates to the field of new energy vehicle technology. The body structure includes a front cabin structure, a battery floor integrated structure and a rear cabin structure. One end of the battery floor integrated structure is connected to the front cabin structure; the rear cabin structure is connected to the other end of the battery floor integrated structure; wherein the side between the two ends of the battery floor integrated structure is connected to the peripheral upper and door molding stop parts, and the battery floor integrated structure has a supporting longitudinal beam, and the battery floor integrated structure can be used as a part of the body longitudinal beam. By adopting a three-section structural body of the front cabin structure, the battery floor integrated structure and the rear cabin structure, the number of parts is reduced, and at the same time, the peripheral upper and door molding stop parts are directly connected to the battery floor integrated structure, so that iterative development of the whole vehicle is realized and the development cycle is reduced.

[0006] However, this technology does not involve the technical problems and technical solutions of the present application. Summary of the invention

[0007] The technical problem to be solved by the present invention is: in view of the shortcomings of the existing technology, a new energy vehicle body structure with a simple structure is provided, which improves the space utilization while improving the bending, torsion and collision performance of the vehicle body, avoids the use of the whole package glue injection solution, is conducive to the maintenance and recycling of the battery pack, and at the same time maximizes the Y-direction cross-sectional area of ​​the beam system from the door sill to the battery pack, improves the side collision and side column collision safety performance, solves the seat strength problem after the seat crossbeam and the battery pack are integrated, and is conducive to improving the body torsional stiffness and side collision performance of the vehicle body.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0009] The present invention is a new energy vehicle body structure. The battery pack skeleton 1 includes a lower shell 2 and an upper cover plate. The lower shell includes an outer frame beam, a lower bottom plate, and an internal arrangement beam. The outer frame beam and the lower bottom plate are an integrated structure made of aluminum alloy. A trapezoidal structure or a wedge-shaped structure is arranged on the outer side of the outer frame beam. The trapezoidal structure or the wedge-shaped structure includes an outer frame inclined portion. A battery cell is arranged in the lower shell. The protruding portion of a door sill inner plate abuts against the upper portion of the outer frame. The inner plate inclined portion of the door sill inner plate abuts against the outer frame inclined portion. A bolt bushing is arranged on the inner side of the inner plate inclined portion. A threaded sleeve is arranged on the inner side of the outer frame. The threaded bushing and the threaded sleeve are connected by bolts. A seat cross beam is arranged on the upper portion of the upper cover plate. An internal arrangement beam is arranged in the lower shell directly below the seat cross beam.

[0010] The upper cover is a structure formed by welding a plurality of metal plates, and the thickness of the metal plates at the position connected to the seat cross beam is greater than the thickness of the metal plates at the position not connected to the seat cross beam.

[0011] A frame support beam is arranged inside the outer frame beam, and the frame support beam extends from the lower part of the outer frame to the upper part of the outer frame.

[0012] A silica gel foam block is arranged between the protruding portion of the inner plate of the door sill and the upper portion of the outer frame.

[0013] The upper cover plate is connected to the connecting portion along the inner side of the upper part of the outer frame by upper cover plate bolts. The upper part of the outer frame and the connecting portion are an integrated structure, and a sealing gasket is arranged between the connecting portion and the upper cover plate.

[0014] The outer frame beam comprises a left outer frame and a right outer frame, and the threshold inner plate comprises a left threshold outer plate and a right threshold outer plate.

[0015] The seat cross beams include a front row seat cross beam and a rear row seat cross beam. A front row internal arrangement beam is arranged in a lower shell body directly below the front row seat cross beam, and a rear row internal arrangement beam is arranged in a lower shell body directly below the rear row seat cross beam.

[0016] The rocker inner plate is connected to the side panel outer plate, and a side panel outer plate reinforcement plate is arranged on the inner side of the side panel outer plate.

[0017] The front row seat cross beam and the rear row seat cross beam are cross beams.

[0018] A cooling water channel is arranged inside the lower bottom plate of the lower shell.

[0019] The technical solution of the present invention is adopted, and the working principle and beneficial effects are as follows:

[0020] The new energy vehicle body structure of the present invention is to manufacture a battery pack frame, which includes a lower shell and an upper cover plate. The lower shell includes an outer frame beam, a lower bottom plate, and an internal arrangement beam. The outer frame beam and the lower bottom plate are an integrated structure made of aluminum alloy. The overall strength of the lower bottom plate is reliable and meets the requirements. The lower shell is provided with a battery cell, and a plurality of battery cells form a battery pack to meet the vehicle's requirements for battery performance. The battery pack frame arranged with the battery pack is not only used to arrange the battery pack, but also a component of the lower body, so that there is no need to separately arrange the battery pack and the body structure, thereby reducing costs and increasing the arrangement space of the battery pack of the vehicle. A trapezoidal structure or a wedge-shaped structure is arranged on the outer side of the outer frame beam, and the trapezoidal structure or the wedge-shaped structure includes an outer frame inclined portion. When the vehicle is formed, the battery pack frame needs to be connected to the inner plate of the door sill. Specifically, the protruding portion of the inner plate of the door sill abuts against the upper portion of the outer frame, and the inner plate inclined portion of the door sill inner plate abuts against the outer frame inclined portion. A bolt bushing is arranged on the inner side of the inner plate inclined portion, and a threaded sleeve is arranged on the inner side of the outer frame. The threaded bushing and the threaded sleeve are connected by bolts. A seat crossbeam is arranged on the upper part of the upper cover plate. The seat crossbeam is used to install the seat, so this part is subjected to greater force. For this reason, an internal arrangement beam is arranged in the lower shell just below the seat crossbeam to provide reliable support for the seat crossbeam and improve the overall strength. In the new energy vehicle body structure of the present invention, the lower shell of the battery pack frame is designed as an aluminum alloy structure, and the upper cover plate is designed as a steel sheet metal structure. The structure of the lower shell needs to consider collision safety and the modal performance of the body stiffness, and its characteristics are: ① The longitudinal beams on both sides of the outer frame beam are designed as aluminum alloy extruded beams with a trapezoidal or wedge-shaped cross section, and the inclined surface in the trapezoidal structure or wedge-shaped structure cooperates with the inclined surface of the threshold inner plate of the body structure, and is connected in the Z direction or Y direction by bolts. The outer frame beam is provided with a threaded sleeve, and a bolt bushing is provided at the corresponding position of the threshold inner plate. The two are connected by bolts to reliably ensure the connection strength and overall stiffness. ② An internal arrangement beam is arranged inside the lower shell, and the position of each internal arrangement beam corresponds to the corresponding seat crossbeam position of the upper cover plate, which enhances the side collision force transmission and improves the rigidity of the seat installation point position. The structure of the upper cover takes into account the strength of the seat installation point and the rigidity of the upper cover, and its characteristics are: ① The upper cover is formed by laser welding of multiple metal plates. The upper cover 3 connected to the seat crossbeam uses high-strength and high-thickness metal plates, and the rest uses low-thickness metal plates. ② The seat crossbeam position of the upper cover is set to be connected to the internal arrangement beam of the lower shell in the Z direction through connecting bolts to improve the Z-direction rigidity of the seat crossbeam. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following is a brief description of the contents and symbols in the drawings of this specification:

[0022] Figure 1 This is a schematic structural diagram of the new energy vehicle body structure of the present invention;

[0023] Figure 2It is a front cross-sectional structural schematic diagram of the new energy vehicle body structure of the present invention;

[0024] Figure 3 It is a schematic diagram of a side cross-sectional structure of the new energy vehicle body structure of the present invention;

[0025] The marks in the attached drawings are: 1. Battery pack frame; 2. Lower shell; 3. Upper cover; 4. Outer frame beam; 5. Lower bottom plate; 6. Internal layout beam; 7. Outer frame inclined portion; 8. Battery cell; 9. Door sill inner plate; 10. Protruding portion; 11. Inner plate inclined portion; 12. Cooling water channel; 13. Bolt bushing; 14. Threaded sleeve; 15. Bolt; 16. Frame support beam; 17. Silicone foam block; 18. Upper cover bolt; 19. Connection 1. Part; 20. Sealing gasket; 21. Left outer frame; 22. Right outer frame; 23. Left door sill outer panel; 24. Right door sill outer panel; 25. Front seat cross beam; 26. Rear seat cross beam; 27. Front internal layout beam; 28. Rear internal layout beam; 29. ​​Side panel outer panel; 30. Side panel outer panel reinforcement plate; 31. Rivet nut; 32. Connecting bolt; 33. Lower body; 34. Battery pack; 35. Seat cross beam connector. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the specific implementation of the present invention, such as the shape, structure, mutual position and connection relationship between the various components involved, the function and working principle of each part, etc., through the description of the embodiments with reference to the accompanying drawings:

[0027] As attached Figure 1 -Attached Figure 3As shown, the present invention is a new energy vehicle body structure, the battery pack skeleton 1 includes a lower shell 2 and an upper cover plate 3, the lower shell 2 includes an outer frame beam 4, a lower bottom plate 5, and an internal arrangement beam 6, the outer frame beam 4 and the lower bottom plate 5 are an integrated structure made of aluminum alloy, a trapezoidal structure or a wedge-shaped structure is arranged on the outer side of the outer frame beam 4, the trapezoidal structure or the wedge-shaped structure includes an outer frame inclined portion 7, a battery cell 8 is arranged in the lower shell 2, a protruding portion 10 of a threshold inner plate 9 abuts against the upper part of the outer frame 4, an inner plate inclined portion 11 of the threshold inner plate 9 abuts against the outer frame inclined portion 7, a bolt bushing 13 is arranged on the inner side of the inner plate inclined portion 11, a threaded sleeve 14 is arranged on the inner side of the outer frame 4, a bolt 15 connects the threaded sleeve 13 and the threaded sleeve 14, a seat crossbeam is arranged on the upper part of the upper cover plate 2, and an internal arrangement beam 6 is arranged in the lower shell 2 directly below the seat crossbeam. The above structure proposes an improved technical solution for the deficiencies in the prior art. When setting up the structure, a battery pack frame 1 is made. The battery pack frame 1 includes a lower shell 2 and an upper cover plate 3. The lower shell 2 includes an outer frame beam 4, a lower bottom plate 5, and an internal arrangement beam 6. The outer frame beam 4 and the lower bottom plate 5 are an integrated structure made of aluminum alloy. The overall strength of the lower bottom plate is reliable and meets the requirements. The lower shell 2 is provided with a battery cell 8, and multiple battery cells form a battery pack to meet the vehicle's requirements for battery performance. The battery pack frame 1 arranged with the battery pack is not only used to arrange the battery pack 34, but also a component of the lower body 33, so there is no need to separately set up the battery pack and the body structure, which reduces costs and increases the arrangement space of the battery pack 34 of the vehicle. A trapezoidal structure or a wedge-shaped structure is arranged outside the outer frame beam 4, and the trapezoidal structure or the wedge-shaped structure includes an outer frame inclined portion 7. When the vehicle is formed, the battery pack frame 1 needs to be connected to the inner panel of the door sill. Specifically, the protruding portion 10 of the inner panel of the door sill 9 abuts against the upper portion of the outer frame 4, and the inner panel inclined portion 11 of the inner panel of the door sill 9 abuts against the outer frame inclined portion 7. A bolt bushing 13 is arranged inside the inner panel inclined portion 11, and a threaded sleeve 14 is arranged inside the outer frame 4. Bolts 15 connect the threaded sleeve 13 and the threaded sleeve 14. A seat crossbeam is arranged on the upper portion of the upper cover plate 2. The seat crossbeam is used to install the seat, so this part is subjected to greater force. For this reason, an internal arrangement beam 6 is arranged in the lower shell 2 directly below the seat crossbeam to provide reliable support for the seat crossbeam and improve the overall strength. In the new energy vehicle body structure of the present invention, the lower shell 2 of the battery pack frame 1 is designed as an aluminum alloy structure, and the upper cover plate 3 is designed as a steel sheet metal structure. The structure of the lower shell 2 needs to consider collision safety and vehicle body stiffness modal performance, and its characteristics are: ① The longitudinal beams on both sides of the outer frame beam 4 are designed to be aluminum alloy extruded beams with a trapezoidal or wedge-shaped cross-section, and the inclined surface of the trapezoidal structure or wedge-shaped structure matches the inclined surface of the door sill inner plate of the vehicle body structure (such as Figure 2② The lower shell 2 is provided with an internal arrangement beam 6, and the position of each internal arrangement beam 6 corresponds to the position of the corresponding seat crossbeam of the upper cover 3, which enhances the force transmission of the side collision and improves the rigidity of the seat mounting point. The structure of the upper cover 3 takes into account the strength of the seat mounting point and the rigidity of the upper cover, and its characteristics are: ① The upper cover 3 is formed by laser welding of multiple metal plates, and the upper cover 3 connected to the seat crossbeam uses high-strength and high-thickness metal plates, and the rest of the upper cover uses low-thickness metal plates. ② The seat crossbeam position of the upper cover is provided with a Z-direction connected to the internal arrangement beam inside the lower shell by connecting bolts (as shown Figure 3 The new energy vehicle body structure of the present invention has a simple structure, improves the space utilization rate, improves the bending and torsion and collision performance of the body, avoids the use of the whole package glue injection solution, is conducive to the maintenance and recycling of the battery pack, and at the same time maximizes the Y-direction cross-sectional area of ​​the beam system between the threshold and the battery pack, improves the side collision and side column collision safety performance, solves the seat strength problem after the seat beam and the battery pack are integrated, and is conducive to improving the body torsional stiffness and side collision performance.

[0028] The upper cover plate 3 is a structure formed by welding multiple metal plates, and the thickness of the metal plate connected to the seat cross beam is greater than the thickness of the metal plate not connected to the seat cross beam. In the above structure, the upper cover plate 3 is formed by laser welding multiple metal plates, and the upper cover plate 3 connected to the seat cross beam uses high-strength and high-thickness metal plates, and the remaining parts use low-thickness metal plates. The seat cross beam position of the upper cover plate 3 is provided with an internal arrangement beam in the Z direction connected to the lower shell body by a connecting bolt 32 to improve the Z-direction stiffness of the seat cross beam.

[0029] The outer frame beam 4 is provided with a frame support beam 16, which extends from the lower part of the outer frame 4 to the upper part of the outer frame 4. In the above structure, the frame support beam 16 is used to strengthen the overall strength of the outer frame, and after being connected with the threshold inner plate and the upper cover plate, it can reliably bear the force.

[0030] A silicone foam block 17 is provided between the protruding portion 10 of the sill inner plate 9 and the upper portion of the outer frame 4. The upper cover plate 3 is connected to the connecting portion 19 along the inner side of the upper portion of the outer frame 4 by means of the upper cover plate bolts 18. The upper portion of the outer frame 4 and the connecting portion 19 are an integrated structure. A sealing gasket 20 is provided between the connecting portion 19 and the upper cover plate 3. In the above structure, the upper portion of the outer frame 4 and the connecting portion 19 are an integrated structure, which ensures reliable strength. The upper cover plate 3 is connected to the connecting portion 19 along the inner side of the upper portion of the outer frame 4 by means of the upper cover plate bolts 18, and the upper cover plate connection is reliably realized.

[0031] The outer frame beam 4 includes a left outer frame 21 and a right outer frame 22, and the threshold inner plate 9 includes a left threshold outer plate 23 and a right threshold outer plate 24. The seat cross beam includes a front seat cross beam 25 and a rear seat cross beam 26. A front row internal arrangement beam 27 is arranged in the lower shell 2 just below the front seat cross beam 25, and a rear row internal arrangement beam 28 is arranged in the lower shell 2 just below the rear seat cross beam 26. With the above structure, the vehicle body is bilaterally symmetrical in the front view direction. In this way, the corresponding components need to be bilaterally symmetrical to ensure that the vehicle body meets the performance requirements.

[0032] The rocker inner plate 9 is connected to the side outer plate 29, and a side outer plate reinforcement plate 30 is arranged inside the side outer plate 29. In the above structure, the side outer plate reinforcement plate 30 is used to enhance the overall strength.

[0033] The front row seat cross beam 25 and the rear row seat cross beam 26 are cross beams. A cooling water channel 12 is arranged inside the lower bottom plate 5 of the lower shell 2. In the above structure, the cooling water channel is used to cool each battery cell of the battery pack, and multiple battery cells are arranged adjacent to each other and contact the lower bottom plate respectively.

[0034] The new energy vehicle body structure described in the present invention, when the structure is set, a battery pack frame 1 is made, the battery pack frame 1 includes a lower shell 2 and an upper cover plate 3, the lower shell 2 includes an outer frame beam 4, a lower bottom plate 5, and an internal arrangement beam 6, the outer frame beam 4 and the lower bottom plate 5 are an integrated structure made of aluminum alloy, and the overall strength of the lower bottom plate is reliable and meets the requirements. The battery cell 8 is arranged in the lower shell 2, and multiple battery cells form a battery pack to meet the vehicle's requirements for battery performance, and the battery pack frame 1 arranged in the battery pack is not only used to arrange the battery pack 34, but also a component of the lower body 33, so there is no need to separately set the battery pack and the body structure, which reduces costs and increases the arrangement space of the battery pack 34 of the vehicle. A trapezoidal structure or a wedge-shaped structure is arranged outside the outer frame beam 4, and the trapezoidal structure or the wedge-shaped structure includes an outer frame inclined portion 7. When the vehicle is formed, the battery pack frame 1 needs to be connected to the inner panel of the door sill. Specifically, the protruding portion 10 of the inner panel of the door sill 9 abuts against the upper portion of the outer frame 4, and the inner panel inclined portion 11 of the inner panel of the door sill 9 abuts against the outer frame inclined portion 7. A bolt bushing 13 is arranged inside the inner panel inclined portion 11, and a threaded sleeve 14 is arranged inside the outer frame 4. Bolts 15 connect the threaded sleeve 13 and the threaded sleeve 14. A seat crossbeam is arranged on the upper portion of the upper cover plate 2. The seat crossbeam is used to install the seat, so this part is subjected to greater force. For this reason, an internal arrangement beam 6 is arranged in the lower shell 2 directly below the seat crossbeam (including multiple tracks), which plays a reliable supporting role for the seat crossbeam and improves the overall strength. In the new energy vehicle body structure of the present invention, the lower shell 2 of the battery pack frame 1 is designed as an aluminum alloy structure, and the upper cover plate 3 is designed as a steel sheet metal structure. The structure of the lower shell 2 needs to consider collision safety and vehicle body stiffness modal performance, and its characteristics are: ① The longitudinal beams on both sides of the outer frame beam 4 are designed to be aluminum alloy extruded beams with a trapezoidal or wedge-shaped cross-section, and the inclined surface of the trapezoidal structure or wedge-shaped structure matches the inclined surface of the door sill inner plate of the vehicle body structure (such as Figure 2 ② The lower shell 2 is provided with an internal arrangement beam 6, and the position of each internal arrangement beam 6 corresponds to the position of the corresponding seat crossbeam of the upper cover 3, which enhances the force transmission of the side collision and improves the rigidity of the seat mounting point. The structure of the upper cover 3 takes into account the strength of the seat mounting point and the rigidity of the upper cover, and its characteristics are: ① The upper cover 3 is formed by laser welding of multiple metal plates, and the upper cover 3 connected to the seat crossbeam uses high-strength and high-thickness metal plates, and the rest of the upper cover uses low-thickness metal plates. ② The seat crossbeam position of the upper cover is provided with a Z-direction connected to the internal arrangement beam inside the lower shell by connecting bolts (as shown Figure 3 As shown), in order to improve the Z-direction stiffness of the seat beam.

[0035] The beneficial effects of the new energy vehicle body structure described in the present invention are: 1. By integrating the internal structural parts of the battery pack and the body structural parts, the bending, torsion and collision performance of the body are improved while improving the space utilization rate. And avoid using the whole package injection solution, which is beneficial to the maintenance and recycling of the battery pack. 2. The longitudinal beam structure on both sides of the outer frame beam can maximize the Y-direction cross-sectional area of ​​the beam system from the door sill to the battery pack, thereby improving the safety performance of side collision and side column collision. 3. Through the connection scheme of the criss-cross structural beam and the front seat cross beam and the upper cover plate laser welding plate, the seat strength problem after the integration of the seat cross beam and the battery pack is solved, which is beneficial to improving the torsional stiffness and side collision performance of the body. Therefore, the structure of the present invention can comprehensively improve the performance of the body.

[0036] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A new energy vehicle body structure, characterized in that: The battery pack skeleton (1) comprises a lower shell (2) and an upper cover plate (3); the lower shell (2) comprises an outer frame beam (4), a lower bottom plate (5), and an internally arranged beam (6); the outer frame beam (4) and the lower bottom plate (5) are an integrated structure made of aluminum alloy; a trapezoidal structure or a wedge-shaped structure is arranged on the outer side of the outer frame beam (4); the trapezoidal structure or the wedge-shaped structure comprises an outer frame inclined portion (7); a battery cell (8) is arranged in the lower shell (2); a protruding portion (10) of a threshold inner plate (9) ) is against the upper part of the outer frame (4), the inner plate inclined portion (11) of the threshold inner plate (9) is against the outer frame inclined portion (7), a bolt bushing (13) is arranged on the inner side of the inner plate inclined portion (11), a threaded sleeve (14) is arranged on the inner side of the outer frame (4), a bolt (15) connects the threaded bushing (13) and the threaded sleeve (14), a seat cross beam is arranged on the upper part of the upper cover plate (2), and an internal arrangement beam (6) is arranged in the lower shell (2) directly below the seat cross beam.

2. The new energy vehicle body structure according to claim 1, characterized in that: The upper cover plate (3) is a structure formed by welding a plurality of metal plates, and the thickness of the metal plates at the position connected to the seat cross beam is greater than the thickness of the metal plates at the position not connected to the seat cross beam.

3. The new energy vehicle body structure according to claim 1 or 2, characterized in that: A frame support beam (16) is arranged inside the outer frame beam (4), and the frame support beam (16) extends from the lower part of the outer frame (4) to the upper part of the outer frame (4).

4. The new energy vehicle body structure according to claim 1 or 2, characterized in that: A silica gel foam block (17) is arranged between the protruding portion (10) of the threshold inner plate (9) and the upper portion of the outer frame (4).

5. The new energy vehicle body structure according to claim 1 or 2, characterized in that: The upper cover plate (3) is connected to the connecting portion (19) along the inner side of the upper portion of the outer frame (4) via the upper cover plate bolts (18); the upper portion of the outer frame (4) and the connecting portion (19) are an integrated structure; a sealing gasket (20) is provided between the connecting portion (19) and the upper cover plate (3).

6. The new energy vehicle body structure according to claim 1 or 2, characterized in that: The outer frame beam (4) comprises a left outer frame (21) and a right outer frame (22), and the threshold inner plate (9) comprises a left threshold outer plate (23) and a right threshold outer plate (24).

7. The new energy vehicle body structure according to claim 1 or 2, characterized in that: The seat cross beam comprises a front row seat cross beam (25) and a rear row seat cross beam (26); a front row internal arrangement beam (27) is arranged in the lower shell (2) directly below the front row seat cross beam (25); and a rear row internal arrangement beam (28) is arranged in the lower shell (2) directly below the rear row seat cross beam (26).

8. The new energy vehicle body structure according to claim 1 or 2, characterized in that: The rocker inner plate (9) is connected to the side outer plate (29), and a side outer plate reinforcement plate (30) is arranged inside the side outer plate (29).

9. The new energy vehicle body structure according to claim 7, characterized in that: The front row seat cross beam (25) and the rear row seat cross beam (26) are cross beams.

10. The new energy vehicle body structure according to claim 1 or 2, characterized in that: A cooling water channel (12) is arranged inside the lower base plate (5) of the lower shell (2).

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