A range extender battery pack mounting structure and a vehicle

Abstract

This invention belongs to the field of range-extended battery pack technology and discloses a range-extended battery pack mounting structure and a vehicle. The range-extended battery pack mounting structure includes a floor assembly structure. A fixing unit is provided on the upper end of the front floor assembly structure. The fixing unit fixes the pure electric battery pack or range-extended battery pack to the front floor assembly structure. A battery pack mounting left frame and a battery pack mounting right frame are provided on both sides of the front floor assembly structure, which helps to improve the installation stability of the range-extended battery pack, optimizes the overall vehicle structure, and improves vehicle safety and driving experience. The battery pack is fixedly connected to the front floor assembly structure through connectors. Four transition brackets are provided at the front and rear of the range-extended battery pack. One end of the bracket is fixedly connected to the range-extended battery pack, and the other end is fixedly connected to the vehicle body. This invention solves the technical problems that the front floor assembly parts involved in the normal development of range-extended battery packs need to be redeveloped, which results in high development costs, long development cycles, and incompatibility with pure electric platforms.

Description

Technical Field

[0001] This invention belongs to the field of range extender battery pack technology, and relates to a range extender battery pack installation structure and an automobile. Background Technology

[0002] With the continuous development of the new energy vehicle market and the advancement of technology, range-extending battery packs are constantly being innovated and improved, and are widely used in various range-extended electric vehicles, especially those models that require long driving range and flexible charging methods. A range-extending battery pack is a device in a range-extended electric vehicle used to store electrical energy. It works in conjunction with other battery systems on the vehicle, such as the main battery, to provide power support. When the vehicle's main battery is low on charge, the range-extended electric vehicle can release electrical energy, which is then converted into mechanical energy by the range extender, or directly provides power to the drive motor, thereby extending the vehicle's driving range.

[0003] A vehicle model must accommodate not only the pure electric battery pack but also the range extender battery pack. However, the boundaries of the pure electric and range extender battery packs differ. Compared to the pure electric battery pack, the range extender battery pack is smaller and must also avoid the exhaust pipe. Normally, the front floor assembly components would need to be redeveloped, resulting in high development costs and a long development cycle. Furthermore, it would be incompatible with the pure electric platform, exhibiting differences and limited component commonality. Therefore, modifying the existing pure electric front floor assembly to quickly accommodate the range extender battery pack becomes crucial. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a range-extended battery pack installation structure and vehicle, which modifies the pure electric front floor assembly into a range-extended front floor, enabling the pure electric battery pack, range-extended battery pack, and range-extended front floor to share the same components. This solves the technical problems of the need to redevelop the front floor assembly parts involved in the normal development of the range-extended battery pack, resulting in high development costs, long development cycles, and incompatibility with the pure electric platform.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a range extender battery pack mounting structure, including a front floor assembly structure. A fixing unit is provided at the upper end of the front floor assembly structure. The front floor assembly structure is fixedly connected to the range extender battery pack through the fixing unit. A battery pack mounting left frame and a battery pack mounting right frame are respectively provided on both sides of the front floor assembly structure. The battery pack mounting left frame and the battery pack mounting right frame are fixedly connected to the front floor assembly structure through connectors.

[0007] Furthermore, the fixing unit includes a front crossbeam and a rear crossbeam of the front seat; the front crossbeam of the front seat is located at the front end of the front floor assembly structure, and the rear crossbeam of the front seat is located at the rear end of the front floor assembly structure. A first reinforcing plate is provided inside the front crossbeam of the front seat and is fixedly connected to the range extender battery pack through a connector; a second reinforcing plate is provided inside the rear crossbeam of the front seat and is fixedly connected to the range extender battery pack through a connector.

[0008] Furthermore, the fixing unit also includes a left front crossbeam and a right front crossbeam of the front floor; the left front crossbeam and the right front crossbeam of the front floor are located on the side of the front crossbeam of the front seat away from the rear crossbeam of the front seat, the left front crossbeam of the front floor is located at the end near the left frame of the battery pack mounting, and the right front crossbeam of the front floor is located at the end near the right frame of the battery pack mounting. The left front crossbeam and the right front crossbeam of the front floor are located on the same horizontal line and are both fixedly connected to the front floor assembly structure.

[0009] Furthermore, the fixing unit also includes a left front battery pack connecting bracket and a right front battery pack connecting bracket; the left front battery pack connecting bracket is disposed on the front floor assembly structure near the left frame of the battery pack mounting, one end of which is fixedly connected to the range extender battery pack and the other end of which is fixedly connected to the vehicle body; the right front battery pack connecting bracket is disposed on the left front battery pack connecting bracket near the right frame of the battery pack mounting, one end of which is fixedly connected to the range extender battery pack and the other end of which is fixedly connected to the vehicle body.

[0010] Furthermore, the fixing unit also includes a left rear battery pack connecting bracket and a right rear battery pack connecting bracket; the left rear battery pack connecting bracket and the right rear battery pack connecting bracket are disposed on the side of the front seat rear crossbeam away from the front seat front crossbeam, the left rear battery pack connecting bracket is disposed on the front floor assembly structure near the left battery pack mounting frame, one end of which is fixedly connected to the range extender battery pack and the other end of which is fixedly connected to the vehicle body; the right rear battery pack connecting bracket is disposed on the side of the left rear battery pack connecting bracket near the right battery pack mounting frame, one end of which is fixedly connected to the range extender battery pack and the other end of which is fixedly connected to the vehicle body.

[0011] Furthermore, the front crossbeam and the rear crossbeam of the front seat are arranged laterally, and the left front crossbeam and the right front crossbeam of the front floor are located on the same horizontal line.

[0012] Furthermore, the left and right battery pack mounting frames are made of extruded aluminum profiles.

[0013] Furthermore, one end of the battery pack mounting left frame is fixedly connected to the vehicle door sill, and the other end is fixedly connected to the front floor assembly structure; one end of the battery pack mounting right frame is fixedly connected to the vehicle door sill, and the other end is fixedly connected to the front floor assembly structure.

[0014] Furthermore, the front crossbeam of the front seat, the rear crossbeam of the front seat, the left front crossbeam of the front floor, and the right front crossbeam of the front floor are made of steel plates with a thickness of 1.2mm.

[0015] The present invention also provides an automobile that includes the above-described range extender battery pack mounting structure.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] This invention discloses a range extender battery pack mounting structure in which the left and right battery pack mounting frames are in the shape of a ladder and are mounted on both sides of the range extender battery pack. This not only helps to improve the installation stability of the range extender battery pack, but also optimizes the overall vehicle structure to a certain extent, thereby improving vehicle safety and driving experience.

[0018] This invention discloses a range extender battery pack installation structure, which makes partial modifications to the pure electric front floor assembly. A left front crossbeam and a right front crossbeam of the front floor are added to the front end of the front seat crossbeam. The left and right front crossbeams of the front floor can provide more fixing points for the range extender battery pack, making the range extender battery pack more stable during vehicle operation and reducing the risk of displacement caused by vibration or bumps.

[0019] The present invention discloses a range extender battery pack installation structure, in which reinforcing plates are added to the front crossbeam and the rear crossbeam of the front seat to ensure that the range extender battery pack can be firmly fixed to the vehicle chassis during vehicle operation, which helps to distribute and resist the load and vibration generated by the range extender battery pack.

[0020] The present invention discloses a range extender battery pack installation structure, which adds four transition brackets to the front and rear of the range extender battery pack, namely the left front connecting bracket, the right front connecting bracket, the left rear connecting bracket, and the right rear connecting bracket. These brackets are fixedly connected to the range extender battery pack at one end and to the vehicle body at the other end by bolts, for securing the range extender battery pack. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a range-extending battery pack mounting structure according to the present invention;

[0022] Figure 2 This is a front view of the left frame for mounting the battery pack in an embodiment of the present invention;

[0023] Figure 3 This is a side view of the left frame for mounting the battery pack in an embodiment of the present invention;

[0024] Figure 4 This is a front view of the right frame for mounting the battery pack in an embodiment of the present invention;

[0025] Figure 5This is a side view of the right frame for mounting the battery pack in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the left front connecting bracket of the battery pack in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the left rear connecting bracket of the battery pack in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the front floor assembly structure in an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the front crossbeam of the front seat in an embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the structure of the rear crossbeam of the front seat in an embodiment of the present invention;

[0031] Figure 11 This is a schematic diagram of the structure of the left front crossbeam of the front floor in an embodiment of the present invention;

[0032] Figure 12 This is a schematic diagram of the structure of the right front crossbeam of the front floor in an embodiment of the present invention;

[0033] Figure 13 This is a schematic diagram of the connection between the front floor assembly and the range extender battery pack in an embodiment of the present invention;

[0034] Figure 14 for Figure 13 AA partial sectional view.

[0035] Figure label:

[0036] 1-Front floor assembly structure; 2-Left frame for battery pack mounting; 3-Right frame for battery pack mounting; 4-Front crossbeam for front seat; 5-Rear crossbeam for front seat; 6-Left front crossbeam for front floor; 7-Right front crossbeam for front floor; 8-Left front connecting bracket for battery pack; 9-Right front connecting bracket for battery pack; 10-Left rear connecting bracket for battery pack; 11-Right rear connecting bracket for battery pack. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0038] Example 1

[0039] This invention provides a range-extender battery pack mounting structure that quickly solves the problem of fixing the battery pack in the front floor area of ​​range-extender vehicles. It modifies the existing pure electric front floor assembly to a range-extender front floor, reducing development costs and time. Simultaneously, it minimizes modifications to the existing pure electric front floor assembly, allowing for sharing between the pure electric and range-extender battery packs. Figure 1 As shown, a range extender battery pack mounting structure includes: a front floor assembly structure 1, a battery pack mounting left frame 2, a battery pack mounting right frame 3, a front seat front crossbeam 4, a front seat rear crossbeam 5, a front floor left front crossbeam 6, a front floor right front crossbeam 7, a battery pack left front connecting bracket 8, a battery pack right front connecting bracket 9, a battery pack left rear connecting bracket 10, and a battery pack right rear connecting bracket 11.

[0040] like Figure 2 He Ru Figure 3 As shown, the battery pack mounting left frame 2 is installed on one side of the front floor assembly structure 1 and is fixedly connected to the front floor assembly structure 1 by a connector. In this embodiment, the connector is a bolt, and the fixed connection is a threaded connection. One end of the battery pack mounting left frame 2 is connected to the vehicle door sill, and the other end is installed between the front floor assembly structure 1 and the range extender battery pack. This not only helps to enhance the installation stability of the battery pack, but also optimizes the overall vehicle structure to a certain extent, improving vehicle safety and driving experience. Meanwhile, the left frame 2 of the battery pack mounting is ladder-shaped, which has the following advantages: Stable connection: This design uses a ladder-shaped bracket to tightly connect the range extender battery pack to the vehicle sill, forming a stable structural system that effectively prevents the range extender battery pack from shaking and shifting during driving. The ladder-shaped design of the bracket can distribute stress to the entire vehicle structure when the range extender battery pack is subjected to external forces, reducing concentrated impact on a single component and improving the overall structure's impact resistance. Optimized space utilization: It can maximize the use of the space under the sill, reduce encroachment on the interior space, and improve the vehicle's passenger comfort and cargo capacity. Convenient maintenance: It makes the disassembly and installation of the range extender battery pack more convenient, facilitating subsequent maintenance, replacement, and upgrades.

[0041] like Figure 4 He Ru Figure 5As shown, the battery pack mounting right frame 3 is installed on the other side of the front floor assembly structure 1 and is fixedly connected to the front floor assembly structure 1 via connectors. Similar to the battery pack mounting left frame 2, one end is connected to the vehicle sill, and the other end is installed between the front floor assembly structure 1 and the range extender battery pack, forming a sandwich-like integrated structure. This structure is formed by extrusion molding of aluminum profiles, resulting in a lightweight, stable, and reliable design. Aluminum profiles have low density and high strength, making them ideal for lightweight automotive design; they help improve fuel economy or driving range; the naturally formed oxide film on aluminum has good corrosion resistance, effectively resisting external environmental erosion and extending service life; the extrusion molding process allows aluminum profiles to be made into various complex shapes to meet different design requirements, and the processing cost is relatively low; the thermal conductivity of aluminum helps dissipate heat from the range extender battery pack, which has a positive effect on the stability of the range extender battery performance and extends battery life.

[0042] like Figure 9 He Ru Figure 10 As shown, the front seat front crossbeam 4 and the front seat rear crossbeam 5 are mounted on the upper end of the front floor assembly structure 1 and are fixedly connected. The front seat front crossbeam 4 and the front seat rear crossbeam 5 serve as seat crossbeams and also provide fixing points for the range extender battery pack. They connect the range extender battery pack to the battery pack mounting left frame 2 and the battery pack mounting right frame 3, and then connect it to the vehicle body through the battery pack mounting left frame 2 and the battery pack mounting right frame 3, forming the vehicle body and the range extender battery pack into a whole, which can better protect the range extender battery pack.

[0043] The front seat front crossbeam 4 is located at the front end of the front floor assembly structure 1, and the front seat rear crossbeam 5 is located at the rear end of the front floor assembly structure 1. Reinforcing plates are installed inside the front seat front crossbeam 4 and the front seat rear crossbeam 5, and are bolted together for securing the range-extender battery pack. This design modification further enhances the stability and safety of the range-extender battery pack in the vehicle. Adding reinforcing plates inside the crossbeams does not significantly increase the space occupied in the vehicle interior, thus providing a more reasonable installation position and more stable support for the range-extender battery pack without affecting passenger comfort. It should be noted that the material selection for the reinforcing plates should be similar to that of the front seat front crossbeam 4 and the front seat rear crossbeam 5. The reinforcing plates should be made of high-strength, lightweight materials, such as high-strength steel or aluminum alloy. These materials can reduce weight while ensuring strength, thus improving vehicle performance. The size and shape of the reinforcing plates should be designed according to the structure of the front seat front crossbeam 4 and the front seat rear crossbeam 5 and the fixing requirements of the range-extender battery pack. Generally, the reinforcing plates should be tightly fitted to the inside of the crossbeams and matched with the fixing structure of the range-extender battery pack to ensure optimal support.

[0044] like Figure 11 He Ru Figure 12As shown, the left front crossbeam 6 and the right front crossbeam 7 of the front floor are installed on the side of the front seat front crossbeam 4 away from the front seat rear crossbeam 5. The left front crossbeam 6 is located at the end near the left battery pack mounting frame 2, and the right front crossbeam 7 is located at the end near the right battery pack mounting frame 3, providing fixing points for the range extender battery pack mounting structure and the range extender battery pack. Simultaneously, range extender battery pack fixing points are added within the front seat front crossbeam 4 and the front seat rear crossbeam 5, connecting the range extender battery pack, the battery pack mounting left frame 2, the battery pack mounting right frame 3, and the front seat front crossbeam 4 and the front seat rear crossbeam 5 into a single unit, achieving lateral force transmission and energy absorption to comprehensively ensure the safety of the range extender battery pack and the safety of the occupants. The transverse arrangement of the front seat front crossbeam 4 and the front seat rear crossbeam 5 effectively increases the body's lateral stiffness, making the body more stable when subjected to lateral forces such as centrifugal force during cornering and crosswinds. In addition, the transverse arrangement provides an extra protective barrier for passengers, reducing the deformation of the passenger compartment in frontal or side collisions and protecting passengers from injury. Finally, the transversely arranged crossbeams help optimize the interior space layout of the vehicle, providing more usable space for passengers and cargo.

[0045] like Figure 8 As shown, the left front crossbeam 6 and the right front crossbeam 7 of the front floor are connected to the vehicle body cover at one end and to the door sill at the other end, serving to reinforce the vehicle body and providing fixing points for the range extender battery pack. They connect the range extender battery pack to the left mounting frame 2 and the right mounting frame 3, forming a unified whole between the vehicle body and the range extender battery pack. The left front crossbeam 6 and the right front crossbeam 7 of the front floor are symmetrically fixedly mounted on the front floor assembly structure 1.

[0046] In addition, a cross-shaped bracket was added inside the left front crossbeam 6 and the right front crossbeam 7 of the front floor, and an M10 nut was welded on. The cross-shaped bracket is connected to the four sides of the left front crossbeam 6 and the right front crossbeam 7 of the front floor to form a box structure, which is used to provide fixing points for the range extender battery pack.

[0047] The cross-shaped brackets significantly improve the load-bearing capacity and deformation resistance of the left front crossbeam 6 and the right front crossbeam 7 of the front floor. This design is similar to adding extra support points to the structure, allowing the crossbeams to better distribute stress when subjected to external forces, thus avoiding damage caused by stress concentration at a single point. Projection welding nuts are a process of directly welding nuts to metal plates, facilitating subsequent connections with other components such as seats and seatbelt anchor points. This connection method is not only strong and reliable but also simplifies the assembly process and improves production efficiency.

[0048] This invention discloses a range extender battery pack mounting structure that is compatible with pure electric vehicles and can be developed on the same platform. It requires minimal modification to the parts in the front floor assembly area, resulting in a short development cycle and low cost. The left battery pack mounting frame 2, right battery pack mounting frame 3, front seat front crossbeam 4, front seat rear crossbeam 5, front floor left front crossbeam 6 and front floor right front crossbeam 7, battery pack left front connecting bracket 8, battery pack right front connecting bracket 9, battery pack left rear connecting bracket 10, and battery pack right rear connecting bracket 11 are integrally connected to the range extender battery pack. This structure plays a role in synchronously transferring energy during a collision and also improves vehicle body rigidity and protection of the range extender battery pack.

[0049] like Figure 6 As shown, the battery pack front left connecting bracket 8 has a hollow design in the middle. The battery pack front right connecting bracket 9 has the same structure as the battery pack front left connecting bracket 8. One is located on the left and the other on the right, with a raised part in the middle and slightly curved ends. Each end has a circular hole for precise connection with the range extender battery pack. Specifically, the battery pack front left connecting bracket 8 is located on the front floor assembly structure 1 near the battery pack mounting left frame 2. One end is fixedly connected to the range extender battery pack, and the other end is fixedly connected to the vehicle body. The battery pack front right connecting bracket 9 is located on the battery pack front left connecting bracket 8 near the battery pack mounting right frame 3. One end is fixedly connected to the range extender battery pack, and the other end is fixedly connected to the vehicle body. The fixed connection here is a threaded connection.

[0050] like Figure 7 As shown, the battery pack left rear connecting bracket 10 and the battery pack right rear connecting bracket 11 have the same structure. The battery pack left rear connecting bracket 10 and the battery pack left front connecting bracket 8 are located on the same horizontal line, and the battery pack right rear connecting bracket 11 and the battery pack right front connecting bracket 9 are located on the same horizontal line. The battery pack left rear connecting bracket 10 is located on the side of the front crossbeam 4 near the front seat rear crossbeam 5. One end of the battery pack left rear connecting bracket 10 is fixedly connected to the range extender battery pack, and the other end is fixedly connected to the vehicle body. The battery pack right rear connecting bracket 11 is located to the right of the battery pack left rear connecting bracket 10. One end of the battery pack right rear connecting bracket 11 is fixedly connected to the range extender battery pack, and the other end is fixedly connected to the vehicle body.

[0051] like Figure 13 He Ru Figure 14 As shown, the front floor assembly structure 1 is connected to the range extender battery pack, which reduces the development cost and development cycle of the range extender front floor without affecting the pure electric front floor assembly.

[0052] The front seat front crossbeam 4, front seat rear crossbeam 5, front floor left front crossbeam 6, and front floor right front crossbeam 7 use 1.2mm thick steel plates as raw materials. 1.2mm thick steel plates are suitable for various manufacturing processes, including stamping, cutting, welding, and painting. These processes are very mature and efficient in automobile manufacturing, ensuring the stability of the production process and the consistency of product quality. Lightweighting is an important trend in the automotive industry because it can significantly improve fuel economy, reduce carbon dioxide emissions, and help improve vehicle handling and acceleration performance.

[0053] Example 2

[0054] This invention also provides a vehicle including the aforementioned range-extended battery pack mounting structure. The vehicle is an electric range-extended model. This specific structure can be referred to as follows: Figure 1 As for Figure 13 Further details will not be elaborated here. Since the vehicle of the present invention includes the range-extending battery pack and range-extending battery pack mounting structure described in the above embodiments, it possesses all the advantages of the range-extending battery pack mounting structure.

[0055] Range-extending battery packs integrate a Battery Management System (BMS) and the battery pack itself to control the charging and discharging of individual battery cells, estimate State of Charge (SOC), and perform equalization control, ensuring the safe and efficient operation of the battery system. They offer several advantages: extended driving range: Through engine-assisted charging, range-extending battery packs can significantly extend the driving range of electric vehicles, reducing range anxiety for users; increased flexibility: range-extended electric vehicles can be driven by engine power generation even without charging infrastructure, improving usability; and reduced charging frequency: because the engine can charge the battery, users do not need to charge the battery frequently, reducing charging frequency and costs.

[0056] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0057] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

Claims

1. A range extender battery pack mounting structure, characterized in that: The system includes a front floor assembly structure (1), with a fixing unit at the upper end of the front floor assembly structure (1). The front floor assembly structure (1) is fixedly connected to the range extender battery pack through the fixing unit. A battery pack mounting left frame (2) and a battery pack mounting right frame (3) are respectively located on both sides of the front floor assembly structure (1). The battery pack mounting left frame (2) and the battery pack mounting right frame (3) are fixedly connected to the front floor assembly structure (1) through connectors. The fixing unit includes a front crossbeam (4) of the front seat and a rear crossbeam (5) of the front seat; the front crossbeam (4) of the front seat is located at the front end of the front floor assembly structure (1), and the rear crossbeam (5) of the front seat is located at the rear end of the front floor assembly structure (1). A first reinforcing plate is provided inside the front crossbeam (4), and it is fixedly connected to the range extender battery pack through a connector; a second reinforcing plate is provided inside the rear crossbeam (5), and it is fixedly connected to the range extender battery pack through a connector. The fixing unit also includes a front floor left front crossbeam (6) and a front floor right front crossbeam (7); the front floor left front crossbeam (6) and the front floor right front crossbeam (7) are located on the side of the front seat front crossbeam (4) away from the front seat rear crossbeam (5), the front floor left front crossbeam (6) is located at one end near the battery pack mounting left frame (2), the front floor right front crossbeam (7) is located at one end near the battery pack mounting right frame (3), the front floor left front crossbeam (6) and the front floor right front crossbeam (7) are located on the same horizontal line and are fixedly connected to the front floor assembly structure (1); The fixing unit also includes a left rear battery pack connecting bracket (10) and a right rear battery pack connecting bracket (11); the left rear battery pack connecting bracket (10) and the right rear battery pack connecting bracket (11) are located on the side of the front seat rear crossbeam (5) away from the front seat front crossbeam (4). The left rear battery pack connecting bracket (10) is located on the front floor assembly structure (1) near the left battery pack mounting frame (2), with one end fixedly connected to the range extender battery pack and the other end fixedly connected to the vehicle body; the right rear battery pack connecting bracket (11) is located on the side of the left rear battery pack connecting bracket (10) near the right battery pack mounting frame (3), with one end fixedly connected to the range extender battery pack and the other end fixedly connected to the vehicle body.

2. The range extender battery pack mounting structure according to claim 1, characterized in that: The fixing unit also includes a left front connecting bracket (8) and a right front connecting bracket (9) for the battery pack. The left front connecting bracket (8) of the battery pack is set on the front floor assembly structure (1) near the left frame (2) of the battery pack mounting. One end of the bracket is fixedly connected to the range extender battery pack, and the other end is fixedly connected to the vehicle body. The right front connecting bracket (9) of the battery pack is set on the left front connecting bracket (8) of the battery pack near the right frame (3) of the battery pack mounting. One end of the bracket is fixedly connected to the range extender battery pack, and the other end is fixedly connected to the vehicle body.

3. The range extender battery pack mounting structure according to claim 1, characterized in that: The front crossbeam (4) and the rear crossbeam (5) of the front seat are arranged laterally, and the left front crossbeam (6) and the right front crossbeam (7) of the front floor are located on the same horizontal line.

4. The range extender battery pack mounting structure according to claim 1, characterized in that: The battery pack mounting left frame (2) and battery pack mounting right frame (3) are made of extruded aluminum profiles.

5. The range extender battery pack mounting structure according to claim 4, characterized in that: One end of the battery pack mounting left frame (2) is fixedly connected to the vehicle door sill, and the other end is fixedly connected to the front floor assembly structure (1); one end of the battery pack mounting right frame (3) is fixedly connected to the vehicle door sill, and the other end is fixedly connected to the front floor assembly structure (1).

6. The range extender battery pack mounting structure according to claim 1, characterized in that: The front crossbeam (4) of the front seat, the rear crossbeam (5) of the front seat, the left front crossbeam (6) of the front floor, and the right front crossbeam (7) of the front floor are made of steel plates with a thickness of 1.2mm.

7. A car, characterized in that, The range extender battery pack mounting structure includes any one of claims 1-6.

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