Vehicle body rear collision protection structure and vehicle

Abstract

The invention provides a vehicle body rear collision protection structure and a vehicle. The vehicle body rear collision protection structure comprises a rear floor assembly and a high-voltage electric appliance module. The high-voltage electric appliance module is fixed above the rear floor assembly, and the front portion of the high-voltage electric appliance module is raised relative to the rear portion of the high-voltage electric appliance module. The rear floor assembly is provided with an induced deformation structure located below the high-voltage electric appliance module, and the induced deformation structure can drive the high-voltage electric appliance module to turn upwards during rear collision. The high-voltage electric appliance module is arranged in a front-high and back-low manner and is provided with an induced deformation structure, so that the high-voltage electric appliance module is induced to turn upwards during collision, and the collision robustness is improved. Meanwhile, the high-voltage electric appliance module is prevented from impacting rigid parts in the vehicle, a time window is created for high-voltage power failure, and the collision safety of the vehicle is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and in particular to a vehicle body rear collision protection structure and a vehicle. Background Art

[0002] In recent years, with the rapid development of new energy vehicles, the number of various electrical components has continued to increase. OEMs are also raising their safety requirements for these components, particularly high-voltage electrical modules. High-voltage electrical components must maintain integrity, preventing high-voltage short circuits, leakage, and fires. In frontal and side collisions, the vehicle relies on beam-type frames to absorb energy and disperse force flow, minimizing damage to the high-voltage electrical modules.

[0003] However, in the event of a high-speed rear-end collision, existing vehicles often have their high-voltage electrical modules located in thin areas, which can collide with chassis components or seats, causing damage and malfunction, potentially leading to fires and potentially causing property damage and life-threatening consequences for occupants. Vehicles with high-voltage electrical modules located in the rear, particularly those with short rear overhangs, can only meet safety requirements for low- and medium-speed rear-end collisions, posing a greater risk in high-speed rear-end collisions.

[0004] Therefore, it is necessary to provide an improved vehicle body rear collision protection structure and a vehicle to solve the above problems. Summary of the Invention

[0005] The present application provides a vehicle body rear collision protection structure and a vehicle that are collision-stable and highly safe.

[0006] The present application provides a vehicle body rear collision protection structure, comprising: a rear floor assembly and a high-voltage electrical module; the high-voltage electrical module is fixed above the rear floor assembly, and the front of the high-voltage electrical module is raised relative to the rear of the high-voltage electrical module; the rear floor assembly is provided with an induced deformation structure located below the high-voltage electrical module, and the induced deformation structure can drive the high-voltage electrical module to flip upward during a rear collision.

[0007] Furthermore, the induced deformation structure includes an induced deformation zone and a reinforcement zone, the induced deformation zone is located at the rear of the reinforcement zone, and the stiffness of the reinforcement zone is greater than the stiffness of the induced deformation zone; the front of the high-voltage electrical module is located at the reinforcement zone, and the rear of the high-voltage electrical module is located at the induced deformation zone.

[0008] Furthermore, a first convex rib is provided on the induced deformation zone, and a second convex rib is provided on the reinforcement zone, and the density of the first convex rib in the induced deformation zone is smaller than the density of the second convex rib in the reinforcement zone.

[0009] Furthermore, the high-voltage electrical module is fixed to the rear floor assembly through several mounting points, one mounting point located at the frontmost side of the high-voltage electrical module is arranged in the reinforcement area, and the remaining mounting points are arranged in the induced deformation area.

[0010] Furthermore, the plurality of mounting points include front mounting points and rear mounting points; the front mounting points are arranged on the left and right sides of the high-voltage electrical module, and the rear mounting points are arranged on the rear side of the high-voltage electrical module.

[0011] Furthermore, the connection strength of the front mounting point is smaller than the connection strength of the rear mounting point.

[0012] Furthermore, the front mounting point and the rear mounting point both include a mounting platform provided on the rear floor assembly and a mounting bracket provided on the high-voltage electrical module; the height of the mounting platform at the front mounting point is greater than the height of the mounting platform at the rear mounting point.

[0013] Furthermore, the rear floor assembly includes a rear storage box floor and a front portion of the rear floor assembled together; the rear storage box floor forms a concave cavity, the high-voltage electrical module is arranged in the concave cavity, and the induced deformation structure is arranged at the bottom of the concave cavity; the reinforcement area is higher than the induced deformation area, and a vertical surface is formed between the induced deformation area and the reinforcement area.

[0014] Furthermore, the rear floor assembly is provided with a collision guide block located in front of the high-voltage electrical module, and the collision guide block forms a guide surface that gradually rises from the back to the front to guide the high-voltage electrical module to flip upward.

[0015] Furthermore, the collision guide block includes a plurality of guide ribs arranged in parallel, and the plurality of guide ribs form the guide surface.

[0016] Furthermore, it also includes rear seats, a rear panel and a rear anti-collision beam. The rear seats are arranged in front of the high-voltage electrical module and close to the collision guide block. The high-voltage electrical module is spaced a certain distance from the rear panel.

[0017] The present application also provides a vehicle, comprising the vehicle body rear collision protection structure as described above.

[0018] This application utilizes a high-front-low-rear layout of the high-voltage electrical module and incorporates an inducing deformation structure to induce the module to flip upward during a collision, improving collision robustness. This also prevents the module from striking rigid components within the vehicle, creating a time window for high-voltage power outages and enhancing vehicle collision safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 11 is a perspective view of a vehicle body rear collision protection structure according to an exemplary embodiment of the present application.

[0020] Figure 2 yes Figure 1 A bottom view of the deformation-inducing structure of the rear impact protection structure of the vehicle body is shown.

[0021] Figure 3 yes Figure 2 A three-dimensional image of the induced deformation structure is shown.

[0022] Figure 4 yes Figure 1 The figure shows a side view of the assembly of the induced deformation structure of the rear collision protection structure of the vehicle body and the high-voltage electrical module.

[0023] Figure 5 yes Figure 1 An enlarged view of a portion of the rear impact protection structure of the vehicle body is shown.

[0024] Figure 6 yes Figure 5 A partial enlarged view of the rear collision protection structure of the vehicle body from another perspective.

[0025] Figure 7 yes Figure 5 A top view of the rear impact protection structure of the vehicle body is shown.

[0026] Explanation of Figure Numbers

[0027] 1. Rear floor assembly; 10. Induced deformation structure; 11. Induced deformation zone; 111. First rib; 112. Vertical surface; 12. Reinforcement zone; 121. Second rib; 122. Fixing surface; 123. Step portion; 13. Mounting point; 131. Front mounting point; 132. Rear mounting point; 133. Mounting platform; 1331. Fixing piece; 134. Mounting bracket; 1341. Fixing hole; 20. Rear storage box floor; 21. Concave cavity; 22. Flanged edge; 221. Notch; 30. Front part of rear floor; 40. Collision guide block; 401. Guide surface; 402. Guide rib; 4021. Horizontal guide rib; 4022. Longitudinal guide rib; 41. First guide block; 42. Second guide block; 2. High-voltage electrical module; 201. Interface; 3. Rear seat; 4. Rear panel; 5. Rear anti-collision beam. DETAILED DESCRIPTION

[0028] Here, the technical solutions in the embodiments (or "implementations") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0029] If there are terms related to directional indications or positional relationships in the embodiments of this application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of this application are only used for the purpose of convenience of description and should not be understood as indicating or implying relative importance.

[0030] See also Figure 1 As shown, the present application provides a vehicle body rear collision protection structure, including a rear floor assembly 1, a high-voltage electrical module 2, rear seats 3, a rear panel 4 and a rear anti-collision beam 5. The high-voltage electrical module 2 is fixed above the rear floor assembly 1. The rear seats 3 are arranged in front of the high-voltage electrical module 2 and above the rear floor assembly 1. The rear anti-collision beam 5 and the rear panel 4 are arranged at the rear of the high-voltage electrical module 2. The high-voltage electrical module 2 is spaced a certain distance from the rear panel 4. The rear panel 4 is located in front of the rear anti-collision beam 5. In the embodiment of the present application, the front part is the front part along the length direction of the vehicle body, and the rear part is the rear part along the length direction of the vehicle body.

[0031] The rear floor assembly 1 is provided with an induced deformation structure 10, a rear storage box floor 20, a rear floor front portion 30 and a collision guide block 40. The induced deformation structure 10 is located below the high-voltage electrical module 2. During a rear collision, the induced deformation structure 10 can drive the high-voltage electrical module 2 to flip upward. The rear storage box floor 20 and the rear floor front portion 30 are assembled together. The induced deformation structure 10 is arranged in the rear storage box floor 20. The collision guide block 40 is located on the front side of the high-voltage electrical module 2. In the embodiment of the present application, the upper side refers to the upper side along the height direction of the vehicle body, and the lower side refers to the lower side along the height direction of the vehicle body.

[0032] See also Figures 2 to 4 As shown, the induced deformation structure 10 includes an induced deformation zone 11 and a reinforcement zone 12. The induced deformation zone 11 is located behind the reinforcement zone 12, and the reinforcement zone 12 has greater stiffness than the induced deformation zone 11. The front of the high-voltage electrical module 2 is located in the reinforcement zone 12, while the rear of the high-voltage electrical module 2 is located in the induced deformation zone 11. This difference in stiffness allows the induced deformation structure 10 to bend precisely, thereby controlling the upward flipping of the high-voltage electrical module 2.

[0033] The induced deformation zone 11 is provided with a first rib 111, and the reinforced zone 12 is provided with a second rib 121. The density of the first rib 111 in the induced deformation zone 11 is lower than that of the second rib 121 in the reinforced zone 12, resulting in a lower stiffness in the induced deformation zone 11 than in the reinforced zone 12. The low density of the first rib 111 optimizes the energy absorption efficiency of the induced deformation zone 11, ensuring stable deformation. The high density of the second rib 121 maintains the structural integrity of the reinforced zone 12. The first and second ribs 111, 121 are arranged in the front-to-back and left-to-right directions.

[0034] According to other embodiments of the present application, the plurality of second ribs 121 of the reinforcement zone 12 form a dense grid of cross ribs to enhance the strength of the reinforcement zone 12. Furthermore, the first ribs 111 and second ribs 121 may be provided at different heights to achieve differentiated rib heights, thereby significantly differentiating the strengths of the induced deformation zone 11 and the reinforcement zone 12.

[0035] The reinforced area 12 is higher than the induced deformation area 11, forming a vertical surface 112 between the induced deformation area 11 and the reinforced area 12. The reinforced area 12 also includes a fixed surface 122, which forms a step 123 with the vertical surface 112. The front portion of the high-voltage electrical module 2 rests on the step 123, placing the high-voltage electrical module 2 on the rear storage compartment floor 20, thereby forming an inclination.

[0036] The high-voltage electrical module 2 is secured to the rear floor assembly 1 via several mounting points 13. One mounting point 13, located at the frontmost side of the module, is located in the reinforced area 12, while the remaining mounting points 13 are located in the induced deformation area 11. The varying connection strengths between these mounting points 13 ensure that the high-voltage electrical module 2 can reliably trigger its flip mechanism. According to an embodiment of the present application, these mounting points 13 are located at the intersection of the first rib 111 and the second rib 121.

[0037] See also Figures 5 to 7 As shown, the plurality of mounting points 13 include a front mounting point 131 and a rear mounting point 132. The front mounting point 131 is provided on the left and right sides of the high-voltage electrical module 2. The rear mounting point 132 is provided on the rear side of the high-voltage electrical module 2. The front mounting point 131 provides a position constraint for the high-voltage electrical module 2 along the width direction of the vehicle body, and the position of the rear mounting point 132 can control the tilt angle of the high-voltage electrical module 2. In the embodiment of the present application, the left and right sides are the left and right sides along the width direction of the vehicle body, and the rear side is the rear side along the length direction of the vehicle body.

[0038] According to an embodiment of the present application, there are two front mounting points 131 and two rear mounting points 132, one of which is located at the rear of the vertical surface 112 and the other is located on the fixing surface 122. Alternatively, the high-voltage electrical module 2 may be fixed using a three-point mounting method, i.e., two front mounting points 131 and one rear mounting point 132. This application does not limit the number of front mounting points 131 and rear mounting points 132.

[0039] The connection strength of front mounting point 131 is weaker than that of rear mounting point 132, making it easier for front mounting point 131 to disengage during a collision. This difference in connection strength between the front and rear mounting points allows for orderly disengagement of the mounting points. Front mounting point 131 disengages first to guide the upward tilt of high-voltage electrical module 2, while rear mounting point 132 disengages later to maintain a stable disengagement trajectory.

[0040] In some embodiments, front mounting point 131 can utilize U-shaped mounting holes and low-preload bolts to reduce connection strength. Rear mounting point 132 can be secured using high-strength rivets or welding. Furthermore, the bolt preload force at front mounting point 131 can be lower than that at rear mounting point 132.

[0041] Front mounting point 131 includes a mounting platform 133 mounted on rear floor assembly 1 and a mounting bracket 134 mounted on high-voltage electrical module 2. Rear mounting point 132 also includes a mounting platform 133 mounted on rear floor assembly 1 and a mounting bracket 134 mounted on high-voltage electrical module 2. Mounting bracket 134 is positioned above mounting platform 133. Mounting platform 133 is provided with an upwardly projecting fixing member 1331, and mounting bracket 134 is provided with a fixing hole 1341. Fixing member 1331 protrudes into fixing hole 1341 to connect mounting platform 133 and mounting bracket 134.

[0042] The height of the mounting platform 133 at the front mounting point 131 is greater than that of the mounting platform 133 at the rear mounting point 132, causing the high-voltage electrical module 2 to tilt upward, reducing the collision energy required. At the same time, the step 123 and the mounting platform 133 provide support points for the high-voltage electrical module 2.

[0043] The rear storage box floor 20 forms a concave cavity 21, and the high-voltage electrical module 2 is disposed in the concave cavity 21. The induced deformation structure 10 is disposed at the bottom of the concave cavity 21. The concave cavity 21 can limit the displacement range of the high-voltage electrical module 2, and the vertical surface 112 can guide the upward flipping of the high-voltage electrical module 2. The rear storage box floor 20 is approximately rectangular, with the front side of the rear storage box floor 20 having a straight edge and the rear side of the rear storage box floor 20 having an arc-shaped edge. The height of the high-voltage electrical module 2 is slightly higher than the height of the rear storage box floor 20.

[0044] The collision guide block 40 forms a gradually rising guide surface 401 from rear to front. This inclined guide surface 401 guides the high-voltage electrical module 2 upward, reducing the risk of short circuits. The collision guide block 40 includes several parallel guide ribs 402, which form the guide surface 401. These ribs 402 include transverse guide ribs 4021 extending along the width of the vehicle body and longitudinal guide ribs 4022 extending along the length of the vehicle body. The transverse guide ribs 4021 are arranged perpendicular to the longitudinal guide ribs 4022.

[0045] According to an embodiment of the present application, the collision guide block 40 is integrally formed on the rear floor front portion 30 and is a cast aluminum structure. The collision guide block 40 has a higher rigidity than the deformation inducing structure 10 .

[0046] The collision guide block 40 includes a first guide block 41 and a second guide block 42. The first guide block 41 and the second guide block 42 are both provided on the front portion 30 of the rear floor. The first guide block 41 and the second guide block 42 are located in front of the high-voltage electrical module 2 and are arranged in sequence along the width direction of the vehicle body. When the vehicle encounters a high-speed collision, the front mounting point 131 is disengaged first, and the high-voltage electrical module 2 is tilted, inducing the deformation zone 11 to collapse and sink to guide the front of the high-voltage electrical module 2 to flip up. The rear mounting point 132 is then disengaged from the rear floor assembly 1, and the high-voltage electrical module 2 continues to move forward. Guided by the inclined guide surfaces 401 of the first guide block 41 and the second guide block 42, the high-voltage electrical module 2 further flips upward to avoid collision with the rear seat 3.

[0047] According to the embodiment of the present application, the length and width of the first guide block 41 are both greater than those of the second guide block 42. A horizontal flange 22 is provided on the edge of the rear storage box floor 20, flush with the rear floor front portion 30. The front flange 22 is provided with notches 221 corresponding to the first guide block 41 and the second guide block 42.

[0048] The front of the high-voltage electrical module 2 is elevated relative to the rear. This tilted layout, with the front higher and the rear lower, induces the module 2 to flip upward during a collision, avoiding impact with rigid components and creating a critical time window for the controller to shut off high voltage power. The rear seats 3 are positioned in front of the high-voltage electrical module 2 and adjacent to the collision guide block 40.

[0049] According to an embodiment of the present application, a plurality of interfaces 201 are provided on the side of the high-voltage electrical module 2 for connecting to other electrical modules of the vehicle.

[0050] In some embodiments, the front portion of the high-voltage electrical module 2 is raised 15° to 30°, and the rear portion is connected to the induced deformation zone 11 via the rear mounting point 132. During a collision, the front mounting point 131 is first disengaged, and the high-voltage electrical module 2 flips upward along the guide surface 401 of the collision guide block 40 to avoid the rear seat 3.

[0051] The high-voltage electrical module 2 is positioned upward and angled above the rear floor assembly 1. The rear seats 3 are positioned in front of the module. A collision guide 40 is positioned between the rear seats 3 and the module. In the event of a rear-end collision, the module 2 disengages its rear mounting point 132 in the induced deformation zone 11 and moves forward and upward. After striking the collision guide 40 in front, it moves upward, allowing time for the controller to power down and preventing the rear seats 3 from impacting and potentially causing a short circuit or fire.

[0052] The present application also provides a vehicle, comprising the above-mentioned vehicle body rear collision protection structure.

[0053] This application utilizes a high-front-high-low rear layout of the high-voltage electrical module 2 and incorporates a deformation-inducing structure 10 to induce the high-voltage electrical module 2 to flip upward during a collision, thereby improving collision robustness. This also prevents the high-voltage electrical module 2 from striking rigid components within the vehicle, creating a time window for high-voltage power outages and improving vehicle collision safety.

[0054] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. A vehicle body rear collision protection structure, characterized in that: include: Rear floor assembly and high-voltage electrical module; the high-voltage electrical module is fixed above the rear floor assembly, and the front of the high-voltage electrical module is raised relative to the rear of the high-voltage electrical module; the rear floor assembly is provided with an induced deformation structure located below the high-voltage electrical module, and the induced deformation structure can drive the high-voltage electrical module to flip upward during a rear collision.

2. The vehicle body rear collision protection structure according to claim 1, characterized in that: The induced deformation structure includes an induced deformation zone and a reinforcement zone, the induced deformation zone is located at the rear of the reinforcement zone, and the stiffness of the reinforcement zone is greater than the stiffness of the induced deformation zone; the front of the high-voltage electrical module is located in the reinforcement zone, and the rear of the high-voltage electrical module is located in the induced deformation zone.

3. The vehicle body rear collision protection structure according to claim 2, characterized in that: The induced deformation zone is provided with a first convex rib, and the reinforcement zone is provided with a second convex rib. The density of the first convex rib in the induced deformation zone is smaller than the density of the second convex rib in the reinforcement zone.

4. The vehicle body rear collision protection structure according to claim 2, characterized in that: The high-voltage electrical module is fixed to the rear floor assembly via a plurality of mounting points, wherein the mounting point located at the frontmost side of the high-voltage electrical module is arranged in the reinforcement area, and the remaining mounting points are arranged in the induced deformation area.

5. The vehicle body rear impact protection structure according to claim 4, characterized in that: The plurality of mounting points include a front mounting point and a rear mounting point; the front mounting point is arranged on the left and right sides of the high-voltage electrical module, and the rear mounting point is arranged on the rear side of the high-voltage electrical module.

6. The vehicle body rear impact protection structure according to claim 5, characterized in that: The connection strength of the front mounting point is less than the connection strength of the rear mounting point.

7. The vehicle body rear impact protection structure according to claim 5, characterized in that: The front mounting point and the rear mounting point both include a mounting platform provided on the rear floor assembly and a mounting frame provided on the high-voltage electrical module; the height of the mounting platform at the front mounting point is greater than the height of the mounting platform at the rear mounting point.

8. The vehicle body rear collision protection structure according to claim 2, characterized in that: The rear floor assembly includes a rear storage box floor and a front part of the rear floor assembled together; the rear storage box floor forms a concave cavity, the high-voltage electrical module is arranged in the concave cavity, and the induced deformation structure is arranged at the bottom of the concave cavity; the reinforcement area is higher than the induced deformation area, and a vertical surface is formed between the induced deformation area and the reinforcement area.

9. The vehicle body rear impact protection structure according to claim 1, characterized in that: The rear floor assembly is provided with a collision guide block located at the front side of the high-voltage electrical module. The collision guide block forms a guide surface that gradually rises from the back to the front to guide the high-voltage electrical module to flip upward.

10. The vehicle body rear impact protection structure according to claim 9, characterized in that: The collision guide block includes a plurality of parallel guide ribs, and the plurality of guide ribs form the guide surface.

11. The vehicle body rear impact protection structure according to claim 9, characterized in that: It also includes rear seats, a rear panel and a rear anti-collision beam. The rear seats are arranged in front of the high-voltage electrical module and close to the collision guide block. The high-voltage electrical module is spaced a certain distance from the rear panel.

12. A vehicle, characterized in that: The vehicle body rear impact protection structure comprises the vehicle body rear impact protection structure according to any one of claims 1 to 11.

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