Multi-battery vehicle body platform structure of new energy vehicle

Abstract

The utility model discloses a new energy automobile multi-battery automobile body platform structure which comprises an automobile body floor, thresholds are arranged on the two sides of the automobile body floor, and the two ends of the thresholds are connected with a front longitudinal beam and a rear longitudinal beam respectively. The front longitudinal beam comprises a front longitudinal beam rear section, a battery pack mounting longitudinal beam is arranged at one end of the front longitudinal beam rear section and one end of the rear longitudinal beam, and connectors are detachably connected to the two ends of the battery pack mounting longitudinal beam.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle body structures, and specifically relates to a multi-battery vehicle body platform structure for a new energy vehicle. Background Art

[0002] With the rapid development of the new energy vehicle market, the design and manufacturing of electric vehicles has become a key development direction for the automotive industry. In the design of electric vehicles, the battery pack is the core component of energy storage. Its size and layout have a significant impact on the overall performance, safety, and space efficiency of the vehicle.

[0003] Currently, electric vehicle battery pack designs on the market are often tailored to specific vehicle models and battery technologies, lacking flexibility and versatility. This results in extensive vehicle design redesign and adjustments required for different vehicle models and battery technology iterations, increasing R&D costs and time.

[0004] The existing mainstream technology is a design in which the body and battery pack size are fixedly linked, which has the following major disadvantages: ① Poor design flexibility: The fixed size of the battery pack limits the flexibility of vehicle design. With the advancement of battery technology and changes in market demand, the size and shape of the battery pack may be adjusted, and the fixed-size body structure cannot adapt to these changes, resulting in design limitations. ② High R&D costs: Whenever the battery pack needs to be adjusted or upgraded, the body structure usually needs to be redesigned and tested, which not only increases R&D costs but also prolongs the time it takes to bring the product to market. ③ Poor market adaptability: As consumers' requirements for the range and performance of electric vehicles increase, fixed-size battery packs may not be able to meet the diverse needs of the market, limiting the product's market competitiveness.

[0005] Utility model patent No. CN213768723U, published on July 23, 2021, discloses a front structure for a platform vehicle body. The structure comprises a front anti-collision beam, inner and outer crash boxes arranged in parallel, connected in the vehicle body direction, a front longitudinal beam, and a side reinforcement plate located on the outside of the front longitudinal beam. The front end of the side reinforcement plate is provided with a reinforcement member facing the outer crash box. The outer crash box and reinforcement member are removable. This platform vehicle body front structure also fails to resolve the technical issues described above. Utility Model Content

[0006] The purpose of the utility model is to address the deficiencies of the existing technology and provide a new energy vehicle multi-battery body platform structure that improves design flexibility and reduces development costs.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] The multi-battery body platform structure of the new energy vehicle includes a body floor, with door sills on both sides, and the two ends of the door sills are respectively connected to the front longitudinal beam and the rear longitudinal beam; the front longitudinal beam includes a rear section of the front longitudinal beam, and the rear section of the front longitudinal beam and one end of the rear longitudinal beam are provided with a battery pack mounting longitudinal beam, and the two ends of the battery pack mounting longitudinal beam are detachably connected with joints.

[0009] The joint includes a first joint and a second joint, both of which are provided with bolt holes, the first joint is connected to the rear section of the front longitudinal beam, one end of the rear longitudinal beam is provided with a connecting plate, and the second joint is connected to the connecting plate.

[0010] The battery pack mounting longitudinal beam is arranged parallel to the door sill.

[0011] The vehicle body floor comprises a front floor, and a characteristic rib is provided on the front floor. The characteristic rib is arranged perpendicular to the door sill.

[0012] The battery pack mounting longitudinal beam is a straight-line structure.

[0013] The battery pack mounting longitudinal beam is evenly distributed with weight-reducing holes.

[0014] The battery pack mounting longitudinal beams are symmetrically arranged about the midline of the vehicle body floor.

[0015] The technical effect of the utility model is as follows: the multi-battery body platform structure of the new energy vehicle of the utility model is adopted, and the battery pack mounting longitudinal beam is installed between the body longitudinal beams to meet the design requirements of the vehicle model equipped with the battery pack; by designing a detachable joint structure, the Y-direction movement of the battery pack mounting longitudinal beam is met, thereby solving the problem that the current fixed-size body structure cannot adapt to the installation of battery packs of different sizes; the battery pack mounting longitudinal beam constitutes a second independent force transmission structure on the body floor structure, which is convenient for integration into the body, thereby improving the body stiffness, modal and collision performance; it is easy to disassemble, thereby realizing the decoupling of the battery pack mounting structure and the body structure, reducing the redesign and adjustment process of the body structure, and can effectively improve the flexibility of body design, reduce the body development cost, and shorten the development cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] This manual includes the following drawings, which show the following contents:

[0017] Figure 1 This is a structural diagram of the multi-battery body platform structure of the new energy vehicle of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the utility model with the battery pack mounting longitudinal beam removed;

[0019] Figure 3 It is a schematic diagram of the connection between the front longitudinal beam and the door sill of the utility model.

[0020] The markings in the figure are: 1. Body floor; 11. Front floor; 12. Rear floor; 13. Characteristic rib; 2. Battery pack mounting longitudinal beam; 21. First joint; 22. Second joint; 23. Bolt hole; 24. Weight reduction hole; 3. Door sill; 4. Front longitudinal beam; 41. Rear section of front longitudinal beam; 5. Rear longitudinal beam; 51. Connecting plate; 6. Subframe mounting seat. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate their implementation.

[0022] like Figures 1 to 3 As shown, the multi-battery body platform structure of the new energy vehicle includes a body floor 1, with door sills 3 on both sides of the body floor 1, and the two ends of the door sills 3 are respectively connected to the front longitudinal beam 4 and the rear longitudinal beam 5; the front longitudinal beam 4 includes a front longitudinal beam rear section 41, and the front longitudinal beam rear section 41 and one end of the rear longitudinal beam 5 are provided with a battery pack mounting longitudinal beam 2, and the two ends of the battery pack mounting longitudinal beam 2 are detachably connected with joints.

[0023] The battery pack mounting longitudinal beam 2 satisfies the battery pack installation requirements. It is removable and can adapt to vehicle structures without a battery pack, thus meeting two vehicle body design requirements. After the battery pack mounting longitudinal beam 2 is installed, the force transmission structure consists of the main vehicle body force transmission structure and the battery pack mounting longitudinal beam 2. The vehicle body's main force transmission structure consists of the front longitudinal beam 4, the front longitudinal beam rear section 41, and the door sill 3. The front longitudinal beam rear section 41 connects the front longitudinal beam 4 and the door sill 3. The force transmission path is front longitudinal beam 4 → front longitudinal beam rear section 41 → door sill 3, ensuring the integrity of the main force transmission path. The battery pack mounting longitudinal beam 2 is connected to the front longitudinal beam rear section 41 and the rear longitudinal beam 5 by two sets of front and rear joints, forming a second force transmission path: front longitudinal beam 4 → front longitudinal beam rear section 41 → battery pack mounting longitudinal beam 2 front joint → battery pack mounting longitudinal beam 2. The design of the battery pack mounting longitudinal beam 2 has little impact on the vehicle body's main force transmission path, which helps reduce the need for redesign or adjustment of the vehicle body's force transmission structure.

[0024] like Figures 1 to 3As shown, the joints include a first joint 21 and a second joint 22, both of which are equipped with bolt holes 23. The first joint 21 connects to the rear section 41 of the front longitudinal beam. A connecting plate 51 is provided at one end of the rear longitudinal beam 5, and the second joint 22 connects to the connecting plate 51. The connecting plate 51 is the connection point between the rear longitudinal beam 5 and the battery pack mounting longitudinal beam 2, which does not occupy the space of the rear longitudinal beam 5 itself. The first joint 21 and the second joint 22 connect to the front and rear longitudinal beams 5, respectively. Both joints are detachable, allowing for easy adjustment and enabling Y-axis movement of the battery pack mounting longitudinal beam 2 to accommodate battery packs of varying sizes or shapes. The rear ends of the front longitudinal beam 4 are connected to the sill 3 and the subframe mounting bracket 6, respectively. To ensure proper force transmission in the main path, the X-axis overlap L1 between the rear section 41 of the front longitudinal beam and the sill 3 should be greater than 230 mm. A reinforcing plate should be provided internally, and thermoformed grades are recommended.

[0025] like Figure 1 As shown, the battery pack mounting longitudinal beam 2 is arranged parallel to the door sill 3. Because the battery pack mounting longitudinal beam 2 forms a second force transmission path, the above structure facilitates the integration of the battery pack mounting longitudinal beam 2 structure into the vehicle body structure, which plays a role in improving the vehicle body stiffness, modal and collision performance.

[0026] like Figure 1 As shown, the battery pack mounting longitudinal beam 2 is evenly distributed with weight-reducing holes 24. The multiple weight-reducing holes 24 are used to reduce the weight of the battery pack mounting longitudinal beam 2, which is in line with the lightweight design of the vehicle body structure.

[0027] like Figure 1 and Figure 2 As shown, the vehicle body floor 1 includes a front floor panel 11, which is provided with a characteristic rib 13, which is arranged perpendicular to the door sill 3. The characteristic rib 13 of the front floor panel 11 is designed to be parallel to the Y direction of the vehicle body coordinate system so that the Y-direction sliding of the battery pack mounting longitudinal beam 2 does not affect the overlap with the front floor panel 11.

[0028] like Figure 1 As shown, the battery pack mounting longitudinal beam 2 is a straight-line structure. The battery pack mounting longitudinal beam 2 has a simple structure and a standardized design. The left and right parts are universal, which reduces production costs. Therefore, only the corresponding joint structure needs to be adjusted or replaced to achieve the Y-direction movement of the battery pack mounting longitudinal beam 2 to achieve the purpose of matching battery packs of different Y-direction sizes, thereby adapting to changes in battery pack size or shape and improving the design flexibility of the vehicle body structure.

[0029] like Figure 1 and Figure 2 As shown, the battery pack mounting longitudinal beams 2 are symmetrically arranged about the midline of the vehicle body floor 1. A pair of battery pack mounting longitudinal beams 2 are provided on the vehicle body, aligning the force transmission structure on both sides of the vehicle body and improving the strength of both sides, facilitating design and testing.

[0030] The multi-battery body platform structure of the new energy vehicle installs the battery pack installation longitudinal beam 2 between the body longitudinal beams to meet the design requirements of the battery pack configuration vehicle model. By designing a detachable joint structure, the Y-axis movement of the battery pack installation longitudinal beam 2 is met, solving the problem that the current fixed-size body structure cannot adapt to the installation of battery packs of different sizes. The battery pack installation longitudinal beam 2 constitutes a second independent force transmission structure on the body floor 1 structure, which is easy to integrate into the body, thereby improving the body stiffness, modal and collision performance. It is easy to disassemble, realizing the decoupling of the battery pack installation structure and the body structure, reducing the redesign and adjustment process of the body structure, and can effectively improve the flexibility of body design, reduce body development costs, and shorten the development cycle.

[0031] The above description of the present invention is illustrative, with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any direct application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.

Claims

1. A multi-battery body platform structure for a new energy vehicle, characterized by: The invention comprises a vehicle body floor (1), door sills (3) are provided on both sides of the vehicle body floor (1), and the two ends of the door sills (3) are respectively connected to a front longitudinal beam (4) and a rear longitudinal beam (5); the front longitudinal beam (4) comprises a front longitudinal beam rear section (41), and a battery pack mounting longitudinal beam (2) is provided at one end of the front longitudinal beam rear section (41) and the rear longitudinal beam (5), and the two ends of the battery pack mounting longitudinal beam (2) are detachably connected with joints.

2. The multi-battery body platform structure of a new energy vehicle according to claim 1, characterized in that: The joint comprises a first joint (21) and a second joint (22), wherein the first joint (21) and the second joint (22) are both provided with bolt holes (23), the first joint (21) is connected to the rear section (41) of the front longitudinal beam, one end of the rear longitudinal beam (5) is provided with a connecting plate (51), and the second joint (22) is connected to the connecting plate (51).

3. The multi-battery body platform structure of a new energy vehicle according to claim 2 is characterized in that: The battery pack mounting longitudinal beam (2) is arranged parallel to the door sill (3).

4. The multi-battery body platform structure of a new energy vehicle according to claim 3 is characterized in that: The vehicle body floor (1) comprises a front floor (11), and a characteristic rib (13) is provided on the front floor (11), wherein the characteristic rib (13) is arranged perpendicular to the door sill (3).

5. The multi-battery body platform structure for a new energy vehicle according to any one of claims 1 to 4, characterized in that: The battery pack mounting longitudinal beam (2) is a straight-line structure.

6. The multi-battery body platform structure of a new energy vehicle according to claim 5 is characterized in that: The battery pack mounting longitudinal beam (2) is evenly distributed with weight-reducing holes (24).

7. The multi-battery body platform structure of a new energy vehicle according to claim 6, characterized in that: The battery pack mounting longitudinal beam (2) is symmetrically arranged with respect to the midline of the vehicle body floor (1).

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