A battery pack protection vehicle body structure and vehicle

Abstract

This invention relates to the field of vehicle body structure technology, and discloses a vehicle body structure and vehicle for battery pack protection. The two sill longitudinal beams are connected at their front and rear ends via a sill connecting beam structure and a second-row seat front mounting crossbeam. The two sill longitudinal beams are connected at their middle positions via a front seat front crossbeam structure and a front seat rear crossbeam structure, forming four support paths in the side impact direction. The front ends of both sill longitudinal beams are connected to the front longitudinal beam assembly via a sill connecting beam structure. The sill connecting beam structure and the second-row seat front mounting crossbeam are connected via two sets of front floor longitudinal beams, forming four support paths in the driving direction. Through this "four horizontal and four vertical" structural design, the vehicle body forms a high-rigidity structural frame, fixing the battery pack within the frame. In the event of a collision, the structural frame components minimize the transfer of impact force to the battery pack body, reducing pressure on the internal battery cells and preventing battery pack damage or fire.

Description

Technical Field

[0001] This invention relates to the field of vehicle body structure technology, and in particular to a vehicle body structure and vehicle for battery pack protection. Background Technology

[0002] In the history of the automotive industry, the protection of related components on the vehicle floor of gasoline-powered vehicles was relatively simple. The longitudinal beam structure itself could basically meet the performance and protection requirements of the entire vehicle. Under normal circumstances, only simple protection was needed for the exhaust system, fuel tank system, and brake lines, and the requirements for the vehicle floor were not too high. However, with the rapid development of new energy vehicles and the increasing acceptance of new energy vehicles by consumers, new requirements have been put forward for the three-electric system of the vehicle when purchasing new energy vehicles. In particular, it is necessary to ensure that the battery pack is not damaged during vehicle operation. If the battery pack is squeezed or deformed due to the collision in the event of a lateral or longitudinal collision, it is easy to cause the internal cells of the battery pack to be squeezed, leading to a short circuit and fire inside the battery pack, which poses a significant safety hazard.

[0003] In the existing new energy vehicle body structure, the power battery is mostly placed under the vehicle floor. Generally, a battery pack mounting beam is set under the vehicle floor to install the battery pack. However, this method cannot fully guarantee the safety of the battery pack in the longitudinal direction, and this method does not consider the collision protection of the battery pack in the lateral direction. How to improve the safety of the battery pack during vehicle operation poses a significant challenge to current vehicle OEMs. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a vehicle body structure and vehicle for battery pack protection. By adopting a "four horizontal and four vertical" structural design for the vehicle body, the vehicle body forms a structural frame with high rigidity. When the vehicle is involved in a collision, the impact force is transmitted to the battery pack body as little as possible under the support of the structural frame, thereby reducing the compression of the internal cells of the battery pack and preventing damage or fire to the battery pack.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] In a first aspect, a battery pack protection vehicle body structure includes a central tunnel, which connects the left and right sill longitudinal beams via a floor structure. The front and rear ends of the two sill longitudinal beams are connected by a sill connecting beam structure and a second-row seat front mounting crossbeam. The middle of the two sill longitudinal beams is connected by a front seat front crossbeam structure and a front seat rear crossbeam structure. The front ends of both sill longitudinal beams are connected to the front longitudinal beam assembly via a sill connecting beam structure. The sill connecting beam structure and the second-row seat front mounting crossbeam are connected by two sets of front floor longitudinal beams, with the front floor longitudinal beams located between the two sill longitudinal beams.

[0007] As a further implementation, the sill beam includes a left sill beam assembly and a right sill beam assembly, and the left front floor assembly and the right front floor assembly are connected to the center channel, the left sill beam assembly and the right sill beam assembly as an integral structure.

[0008] As a further implementation, the front seat front crossbeam structure includes a left front seat front crossbeam and a right front seat front crossbeam connected between the central tunnel and the sill longitudinal beam; it also includes a central tunnel front reinforcing beam, which is located on the bottom surface of the floor, and its two ends are connected to the left front seat front crossbeam and the right front seat front crossbeam at one end close to each other.

[0009] As a further implementation, the front seat rear crossbeam structure includes a left front seat rear crossbeam and a right front seat rear crossbeam connected between the central tunnel and the sill longitudinal beam, and also includes a central tunnel rear reinforcing beam, which is located on the bottom surface of the floor, with both ends connected to the left front seat rear crossbeam and the right front seat rear crossbeam at one end close to each other.

[0010] As a further implementation, the rear end of the left sill beam assembly is connected to the left rear longitudinal beam assembly, and the rear end of the right sill beam assembly is connected to the right rear longitudinal beam assembly.

[0011] As a further implementation, the two sill beams are provided with sill structural rubber blocks, the front end of which extends to the left front seat front crossbeam and the left front seat rear crossbeam, which are located away from each other on one side.

[0012] As a further implementation, the sill connecting beam structure is located at the bottom of the floor and includes a left front sill connecting beam and a right front sill connecting beam. The left front sill connecting beam and the right front sill connecting beam are connected at one end close to each other through a central channel connecting beam, and the other end is connected to the sill longitudinal beam.

[0013] As a further implementation, the front sides of the left front sill connecting beam and the right front sill connecting beam are connected to the front longitudinal beam assembly.

[0014] As a further implementation, the extension line of the front longitudinal beam assembly is located between the sill longitudinal beam and the front floor longitudinal beam.

[0015] Secondly, a vehicle that employs a battery pack protection body structure as described above.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. In this invention, the front and rear ends of the two sill longitudinal beams are connected by a sill connecting beam structure and a second-row seat front mounting crossbeam. The middle of the two sill longitudinal beams is connected by a front seat front crossbeam structure and a front seat rear crossbeam structure, forming four support paths in the side impact direction of the vehicle body. The front ends of both sill longitudinal beams are connected to the front longitudinal beam assembly by a sill connecting beam structure. The sill connecting beam structure and the second-row seat front mounting crossbeam are connected by two sets of front floor longitudinal beams, forming four support paths in the driving direction. Through the "four horizontal and four vertical" structural design, the vehicle body forms a high-rigidity structural frame, fixing the battery pack in the structural frame. In the event of a collision, the structural frame components minimize the transmission of collision force to the battery pack body, reducing the compression of the internal cells of the battery pack and preventing battery pack damage or fire.

[0018] 2. The vehicle body structure frame of the present invention can absorb and decompose the side impact force and the impact force in the driving direction, which can effectively solve the safety risks caused by the compression of the battery pack during use. It can also prevent the battery pack from deforming due to collision, causing the internal cells to be squeezed, leading to short circuits and fires inside the battery pack. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0020] Figure 1 This is a schematic diagram of the overall structure of the vehicle body for battery pack protection in an embodiment of the present invention;

[0021] Figure 2 This is a bottom view of the vehicle body structure for battery pack protection in an embodiment of the present invention;

[0022] Figure 3 This is a top view of the collision avoidance path of the vehicle body structure for battery pack protection in an embodiment of the present invention;

[0023] Figure 4 This is a bottom view of the vehicle body structure for battery pack protection in an embodiment of the present invention, showing the installation of the battery pack.

[0024] In the diagram: the spacing or dimensions between parts have been exaggerated to show their positions. The diagram is for illustrative purposes only. The reference numerals are as follows:

[0025] 01. Left door sill longitudinal beam assembly; 13. Right door sill longitudinal beam assembly;

[0026] 02. Front crossbeam of the left front seat; 11. Front crossbeam of the right front seat;

[0027] 03. Front left floor assembly; 12. Front right floor assembly;

[0028] 04. Rear crossbeam of the left front seat; 09. Rear crossbeam of the right front seat;

[0029] 05. Install a crossbeam in front of the second-row seats; 08. Rear crossbeam;

[0030] 21. Left rear longitudinal beam assembly; 06. Right rear longitudinal beam assembly;

[0031] 19. Left door sill structural adhesive block; 10. Right door sill structural adhesive block;

[0032] 14. Left front longitudinal beam assembly; 22. Right front longitudinal beam assembly;

[0033] 28. Rear part of the left front longitudinal beam; 29. ​​Rear part of the right front longitudinal beam;

[0034] 15. Left front sill connecting beam; 23. Right front sill connecting beam;

[0035] 16. Left front floor longitudinal beam; 24. Right front floor longitudinal beam;

[0036] 18. Front reinforcing beam of the central tunnel; 20. Rear reinforcing beam of the central tunnel;

[0037] 26. Central channel connecting beam; 27. Central channel connecting plate;

[0038] 07. Central passage. Detailed Implementation

[0039] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0040] Example 1

[0041] In a typical embodiment of the present invention, reference is made to Figures 1-4 As shown, a vehicle body structure for battery pack protection includes a floor, a central channel connecting beam, a central channel reinforcing beam, a sill connecting plate, a front crossbeam for the front seats, a front mounting crossbeam for the second-row seats, a sill longitudinal beam, a sill structural rubber block, a floor longitudinal beam, a rear body of the front longitudinal beam, a front longitudinal beam, and a rear longitudinal beam. These components form a "four horizontal and four vertical" vehicle body support structure, ensuring the support rigidity of the vehicle body frame and fixing the battery pack in the structural frame. In the event of a vehicle collision, the structural frame components minimize the transfer of collision force to the battery pack body, reducing pressure on the internal cells of the battery pack and preventing battery pack damage or fire.

[0042] like Figure 1 and Figure 2As shown, the vehicle body structure includes a left sill longitudinal beam assembly 01 and a right sill longitudinal beam assembly 13 located on both sides of the vehicle body structure. A central passage 07 is provided in the middle of the vehicle body structure along the driving direction. The left front floor assembly 03 and the right front floor assembly 12 are connected between the left sill longitudinal beam assembly 01 and the right sill longitudinal beam assembly 13 near the bottom, and the joint between the left front floor assembly 03 and the right front floor assembly 12 is fixedly connected to the bottom of the central passage 07.

[0043] The rear end of the left sill longitudinal beam assembly 01 is connected to the left rear longitudinal beam assembly 21. The rear end of the left rear longitudinal beam assembly 21 is used to connect to the rear structure of the vehicle body, which will not be described in detail here. Correspondingly, the rear end of the right sill longitudinal beam assembly 13 is connected to the front end of the right rear longitudinal beam assembly 06. The rear end of the right rear longitudinal beam assembly 06 is used to connect to the rear structure of the vehicle body. The right rear longitudinal beam assembly 06 and the right sill longitudinal beam assembly 13 are located on the same straight line, as are the left sill longitudinal beam assembly 01 and the left rear longitudinal beam assembly 21. The rear ends of the left sill longitudinal beam assembly 01 and the right sill longitudinal beam assembly 13 are connected by a second-row seat front mounting crossbeam 05.

[0044] The left side of the central tunnel 07 is connected to the left sill longitudinal beam assembly 01 via the left front seat front crossbeam 02 and the left front seat rear crossbeam 04, and the right side is connected to the right sill longitudinal beam assembly 13 via the right front seat front crossbeam 11 and the right front seat rear crossbeam 09. The left front seat front crossbeam 02 and the right front seat front crossbeam 11 are on the same straight line, as are the left front seat rear crossbeam 04 and the right front seat rear crossbeam 09. The left front seat front crossbeam 02 is located in front of the left front seat rear crossbeam 04.

[0045] The left sill longitudinal beam assembly 01 is a hollow longitudinal beam with strong structural rigidity formed by welding the left sill outer plate and the left sill inner plate together. The right sill longitudinal beam assembly 13 is a hollow longitudinal beam with strong structural rigidity formed by welding the right sill outer plate and the right sill inner plate together.

[0046] The sill longitudinal beam assembly contains sill structural rubber blocks, such as... Figure 1 and Figure 2 As shown, a left sill structural rubber block 19 is provided in the left sill longitudinal beam assembly 01, and a right sill structural rubber block 10 is provided in the right sill longitudinal beam assembly 13. Furthermore, the left sill structural rubber block 19 and the right sill structural rubber block 10 have the same length, and their lengths are greater than the distance between the left front seat front crossbeam 02 and the left front seat rear crossbeam 04. The front end of the left sill structural rubber block 19 extends to the front side of the left front seat front crossbeam 02, and the rear end extends to the rear side of the left front seat rear crossbeam 04, so that the structural rubber block can provide support under the Y2 and Y3 force paths.

[0047] like Figure 2As shown is a bottom view of the vehicle body structure. A rear crossbeam 08 is provided on the bottom surface of the floor assembly. The second-row seat front mounting crossbeam 05 includes the rear crossbeam 08 and the second-row seat mounting crossbeam; therefore, in this embodiment, they are collectively referred to as the second-row seat front mounting crossbeam 05. The front side of the second-row seat front mounting crossbeam 05 is welded to the corresponding floor.

[0048] like Figure 2 As shown, the front end of the vehicle body structure is provided with a left longitudinal beam assembly 14 and a right longitudinal beam assembly 22. The rear end of the left longitudinal beam assembly 14 is the rear body 28 of the left front longitudinal beam, and the rear end of the right longitudinal beam assembly 22 is the rear body 29 of the right front longitudinal beam.

[0049] The longitudinal beam assembly 14 and the rear body 28 of the left front longitudinal beam are welded together on the bottom surface of the left front floor assembly 03. Similarly, the right longitudinal beam assembly 22 and the rear body 29 of the right front longitudinal beam are welded together on the bottom surface of the right front floor assembly 12.

[0050] A left front sill connecting beam 15 is welded to the rear end of the left front longitudinal beam rear body 28. The left front sill connecting beam 15 is a crossbeam. The front side of the left front sill connecting beam 15 is welded to the left front longitudinal beam rear body 28, and the rear side is welded to the front end of the left front floor longitudinal beam 16. The rear end of the left front floor longitudinal beam 16 is welded to the second-row seat front mounting crossbeam 05 near the bottom surface. Specifically, the left front floor longitudinal beam 16 and the left front sill connecting beam 15 are both welded to the bottom surface of the left front floor assembly 03, thereby forming a longitudinal beam force transmission path, transferring the collision energy to the left rear longitudinal beam assembly 21 through the second-row seat front mounting crossbeam 05.

[0051] A right sill connecting beam 23 is welded to the rear end of the rear body 29 of the right front longitudinal beam. The right front sill connecting beam 23 is a crossbeam; its front side is welded to the rear body 29 of the right front longitudinal beam, and its rear side is welded to the front end of the right front floor longitudinal beam 24. The rear end of the right front floor longitudinal beam 24 is welded to the second-row seat front mounting crossbeam 05 near its bottom surface. Specifically, both the right front floor longitudinal beam 24 and the right sill connecting beam 23 are welded to the bottom surface of the right front floor assembly 12. This forms a longitudinal beam force transmission path, transferring the collision energy to the right rear longitudinal beam assembly 06 via the second-row seat front mounting crossbeam 05.

[0052] like Figure 2As shown, the outer ends of the right sill connecting beam 23 and the left front sill connecting beam 15 are welded to the sill longitudinal beam, and their inner ends extend to both sides of the central passage, where they are connected as one unit by the central passage connecting plate 27. The central passage connecting plate 27 is fixed to the bottom surface of the floor and is welded to the right sill connecting beam 23 and the left front sill connecting beam 15 on both sides. The bottom surface of the central passage connecting plate 27 is provided with a central passage connecting beam 26, which bolts the inner ends of the right sill connecting beam 23 and the left front sill connecting beam 15. The central passage connecting beam 26, the right sill connecting beam 23, the left front sill connecting beam 15, and the central passage connecting plate 27 are on the same straight line, forming a set of supporting beams.

[0053] like Figure 2 As shown, the front reinforcing beam 18 of the central channel is located on the bottom surface of the floor, and its two ends are connected to the front crossbeam 02 of the left front seat and the front crossbeam 11 of the right front seat, forming a Y2 force transmission path.

[0054] Correspondingly, the rear reinforcing beam 20 of the central channel is located on the bottom surface of the floor and behind the front reinforcing beam 18 of the central channel. Its two ends are connected to the left front seat rear crossbeam 04 and the right front seat rear crossbeam 09 at one end, forming a Y3 force transmission path.

[0055] This embodiment designs four anti-collision support paths in both the transverse and longitudinal directions. The main function of the transverse reinforcing beams is to absorb and decompose the damage to the battery pack caused by side collisions. The transverse reinforcing beam design consists of four anti-collision beam paths, namely Y1, Y2, Y3, and Y4. Y1, Y2, Y3, and Y4 are arranged sequentially from the front to the rear of the vehicle body. See the attached document for details. Figures 1-3 .

[0056] Detailed design of Y1 collision force transmission path: The left front sill longitudinal beam assembly 01 and the left front sill connecting beam 15 are welded together through the left front floor assembly 03. The left front sill connecting beam 15 is then welded to the center channel connecting plate 27 to form the left side of the Y1 crossbeam. The right side is designed in the same way, by welding the right front floor assembly 12, the right sill longitudinal beam assembly 13, the right front sill connecting beam 23, and the center channel connecting plate 27. After the left and right crossbeams are completed, the left and right crossbeams are bolted together through the center channel connecting beam 26 to form a crossbeam that runs from left to right.

[0057] Detailed design of the Y2 collision force transmission path: A left sill structural adhesive block 19 is added to the cavity of the left sill longitudinal beam assembly 01. The left sill longitudinal beam assembly 01 and the left front seat front crossbeam 02 are welded together through the left front floor assembly 03. The left front seat front crossbeam 02 is then welded to the center channel 07 to form the left side of the Y2 crossbeam. The right side is designed in the same way, with the right sill longitudinal beam assembly 13, the right front floor assembly 12, the right front seat front crossbeam 11, and the center channel 07 welded together. After the left and right crossbeams are completed, they are welded together through the center channel front reinforcing beam 18 to form a crossbeam that runs from left to right.

[0058] Detailed design of Y3 collision force transmission path: A left sill structural adhesive block 19 is added to the cavity of the left sill longitudinal beam assembly 01. The left sill longitudinal beam assembly 01 and the left front seat rear crossbeam 04 are welded together through the left front floor 03. The left front seat rear crossbeam 04 is then welded to the central channel 07 to form the left side of the Y3 crossbeam. The right side is constructed in the same way. The right front floor assembly 12, the right front seat rear crossbeam 09, the central channel 07, and the right sill longitudinal beam assembly 13 are welded together to form the right side of the Y3 crossbeam. After the left and right crossbeams are completed, the left and right crossbeams are welded together through the central channel rear reinforcing beam 20 to form a crossbeam that runs from left to right.

[0059] Detailed design of Y4 collision force transmission path: The two ends of the crossbeam 05 installed in front of the second row of seats are welded to the left sill longitudinal beam assembly 01 and the right sill longitudinal beam assembly 13 to form a crossbeam that runs from left to right.

[0060] The specific force transmission path on the collision side is as follows (taking left to right as an example):

[0061] Y1: Left door sill longitudinal beam assembly 01 → Left front door sill connecting beam 15 → Middle passage connecting beam 26 → Right door sill longitudinal beam assembly 13.

[0062] Y2: Left door sill longitudinal beam assembly 01 → Left door sill structural rubber block 19 front end position → Left front seat front crossbeam 02 → Center tunnel front reinforcing beam 18 → Right front seat front crossbeam 11 → Right door sill structural rubber block 10 front end position → Right door sill longitudinal beam assembly 13.

[0063] Y3: Left door sill longitudinal beam assembly 01 → Left door sill structural rubber block 19 rear end position → Left front seat rear crossbeam 04 → Center tunnel rear reinforcing beam 20 → Right front seat rear crossbeam 09 → Right door sill structural rubber block 10 rear end position → Right door sill longitudinal beam assembly 13.

[0064] Y4: Left door sill longitudinal beam assembly 01 → Second row seat front installation crossbeam 05 → Right door sill longitudinal beam assembly 13.

[0065] The "four horizontal and four vertical" design effectively protects the battery pack from lateral impact damage. The following describes the longitudinal reinforcement beam design of the "four vertical" scheme, which consists of four impact-resistant beams. Their main function is to absorb and decompose the impact force from the vehicle's travel direction on the battery pack. The impact paths are X1, X2, X3, and X4, arranged sequentially from the left to the right side of the vehicle. Figures 1-3 As shown.

[0066] Detailed design of X1 collision force transmission path:

[0067] The left longitudinal beam assembly 14 and the rear body 28 of the left front longitudinal beam are welded together by the left front floor assembly 03. Then, the rear body 28 of the left front longitudinal beam, the left front door sill connecting beam 15, and the left door sill longitudinal beam assembly 01 are welded in sequence to form a longitudinal beam force transmission path, which transfers the energy of the collision to the left rear longitudinal beam assembly 21.

[0068] Detailed design of X2 collision force transmission path:

[0069] The left longitudinal beam assembly 14 and the rear body 28 of the left front longitudinal beam are welded together through the left front floor assembly 03. Then, the rear body 28 of the left front longitudinal beam, the left front sill connecting beam 15, and the front end of the left front floor longitudinal beam 16 are welded in sequence. The rear end of the left front floor longitudinal beam 16 is welded to the front crossbeam 05 of the second row of seats to form a longitudinal beam force transmission path. The collision energy is transferred to the left rear longitudinal beam assembly 21 through the front crossbeam 05 of the second row of seats.

[0070] Detailed design of X3 collision force transmission path:

[0071] The right longitudinal beam assembly 22 and the rear body 29 of the right front longitudinal beam are welded together through the right front floor assembly 12. Then, the rear body 29 of the right front longitudinal beam, the right front sill connecting beam 23, and the front end of the right front floor longitudinal beam 24 are welded in sequence. The rear end of the right front floor longitudinal beam 24 is welded to the front crossbeam 05 of the second row of seats to form a longitudinal beam force transmission path. The collision energy is transferred to the right rear longitudinal beam assembly 06 through the front crossbeam 05 of the second row of seats.

[0072] Detailed design of X4 collision force transmission path:

[0073] The right longitudinal beam assembly 22 and the rear body 29 of the right front longitudinal beam are welded together by the right front floor assembly 12. Then, the rear body 29 of the right front longitudinal beam, the right front door sill connecting beam 23, and the right door sill longitudinal beam assembly 13 are welded together in sequence to form a longitudinal beam force transmission path, which transfers the energy of the collision to the right rear longitudinal beam assembly 06.

[0074] By absorbing and dispersing collision forces along four paths in the vehicle's direction of travel, the battery pack can be effectively protected against impacts in the X-direction, thus providing protection for the battery pack. (See attached diagram.) Figure 3 .

[0075] The specific force transmission path in the direction of travel is as follows (taking left to right as an example):

[0076] X1: Left longitudinal beam assembly 14 → Rear body of left front longitudinal beam 28 → Left door sill longitudinal beam assembly 01 → Left rear longitudinal beam assembly 21.

[0077] X2: Left longitudinal beam assembly 14 → Rear body of left front longitudinal beam 28 → Left front floor longitudinal beam 16 → Second row seat front mounting beam 05 → Left rear longitudinal beam assembly 21.

[0078] X3: Right longitudinal beam assembly 22 → Rear body of right front longitudinal beam 29 → Right front floor longitudinal beam 24 → Second row seat front mounting beam 05 → Right rear longitudinal beam assembly 06.

[0079] X4: Right longitudinal beam assembly 22 → Rear part of right front longitudinal beam 29 → Right sill longitudinal beam assembly 13 → Right rear longitudinal beam assembly 06.

[0080] like Figure 4 As shown, the battery pack is fixedly installed at the center of the bottom of the vehicle body structure. The front side of the battery pack is located behind the central channel connecting beam, and the rear side is located in front of the second row seat front mounting beam 05. The left and right sides are located between the front floor longitudinal beam and the sill longitudinal beam assembly, respectively.

[0081] The aforementioned "four horizontal and four vertical" body structure design protects the battery pack within the structural frame, minimizing damage to the battery pack during a collision and effectively improving the safety performance of new energy vehicles.

[0082] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A vehicle body structure for battery pack protection, characterized in that, The system includes a central aisle, which connects the left and right sill beams via a floor structure. The front and rear ends of the two sill beams are connected by a sill connecting beam structure and a front mounting beam for the second row of seats. The middle of the two sill beams is connected by a front seat front beam structure and a front seat rear beam structure. The front ends of both sill beams are connected to the front longitudinal beam assembly via a sill connecting beam structure. The sill connecting beam structure and the front mounting beam for the second row of seats are connected by two sets of front floor longitudinal beams, with the front floor longitudinal beams located between the two sill beams. The sill beams include a left sill beam assembly and a right sill beam assembly. The left front floor assembly and the right front floor assembly are connected to the center tunnel, the left sill beam assembly and the right sill beam assembly as an integral structure. The front seat front crossbeam structure includes a left front seat front crossbeam and a right front seat front crossbeam connected between the central tunnel and the sill longitudinal beam; it also includes a central tunnel front reinforcing beam, which is located on the bottom surface of the floor and whose two ends are connected to the left front seat front crossbeam and the right front seat front crossbeam at one end close to each other. The front seat rear crossbeam structure includes a left front seat rear crossbeam and a right front seat rear crossbeam connected between the central tunnel and the sill longitudinal beam, and also includes a central tunnel rear reinforcing beam, which is located on the bottom surface of the floor, and its two ends are connected to the left front seat rear crossbeam and the right front seat rear crossbeam at one end close to each other. The rear end of the left sill longitudinal beam assembly is connected to the left rear longitudinal beam assembly, and the rear end of the right sill longitudinal beam assembly is connected to the right rear longitudinal beam assembly. The threshold connecting beam structure is located at the bottom of the floor and includes a left front threshold connecting beam and a right front threshold connecting beam. The left front threshold connecting beam and the right front threshold connecting beam are close to each other at one end and connected by a central channel connecting beam, and the other end is connected to the threshold longitudinal beam. The front longitudinal beam assembly is connected to the left front sill connecting beam and the right front sill connecting beam.

2. The vehicle body structure for battery pack protection according to claim 1, characterized in that, Both of the aforementioned door sill longitudinal beams are provided with door sill structural rubber blocks, the front end of which extends to the left front seat front crossbeam and the left front seat rear crossbeam, which are located away from each other on one side.

3. The vehicle body structure for battery pack protection according to claim 1, characterized in that, The extension line of the front longitudinal beam assembly is located between the sill longitudinal beam and the front floor longitudinal beam.

4. A vehicle, characterized in that, The vehicle adopts a battery pack protection body structure as described in any one of claims 1-3.

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