Vehicle chassis structure for installing battery pack on platform

Abstract

The invention relates to a vehicle chassis structure for installing a battery pack on a platform, which comprises a vehicle body chassis assembly comprising a left doorsill longitudinal beam and a right doorsill longitudinal beam which are parallel to each other and arranged at an interval, and a vehicle body front floor and a dash panel lower cross beam which are fixedly connected between the left doorsill longitudinal beam and the right doorsill longitudinal beam; the battery pack installation assembly comprises a bolt hole located in the front wall plate lower cross beam, a battery pack front installation support connected to the front wall plate lower cross beam and a battery pack side installation beam connected to the automobile body front floor, and the bolt hole is used for detachably installing a first battery pack; and the battery pack front mounting bracket and the battery pack side mounting beam are used for detachably mounting a second battery pack together. According to the invention, the battery pack front mounting bracket and the battery pack side mounting beam are added or canceled on the vehicle body chassis assembly, so that the battery packs of different vehicle types can be switched and mounted, the difference between a pure electric vehicle and a hybrid electric vehicle is effectively reduced, and the part management difficulty and the production switching requirement are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle chassis, and in particular to a vehicle chassis structure for installing a battery pack on a platform. Background Art

[0002] In the field of new energy vehicles, pure electric vehicles and hybrid vehicles on the same platform have different requirements for battery pack endurance, and the number and layout of battery modules are also different, resulting in differences in battery pack size. It is difficult to solve the compatibility problem between the two platforms without affecting the collision performance of the entire vehicle and the safety of the battery pack. It often requires major changes to the body sheet metal to achieve this, which will greatly increase the vehicle development cycle and cost, and the requirements for parts management and production switching are very high, which is not conducive to mass production of models.

[0003] For pure electric vehicles, the mounting points on both sides of the battery pack are generally arranged on the door sill assembly of the vehicle body. Since the door sill assembly has high requirements for strength and rigidity, it can effectively ensure the safety of the battery pack. However, if you want to switch to a hybrid vehicle battery pack with a shorter driving range, you need to add a longitudinal beam to the pure electric vehicle to provide a mounting point with sufficient strength for the battery pack.

[0004] However, the positions of the battery pack and the battery pack mounting structure are fixed. When the battery pack mounting structure needs to adapt to battery packs of different specifications, the battery pack mounting structure needs to be redeveloped and designed, which greatly increases the production cost. At the same time, since the installation position of the battery pack is fixed, the battery pack mounting structure is difficult to meet the layout requirements of battery packs of different specifications and positions, resulting in poor scalability and low versatility of the battery pack mounting structure. Summary of the invention

[0005] The embodiments of the present application provide a vehicle chassis structure for installing a battery pack in a platform-based manner, so as to solve the problem in the related art that the battery pack installation structure is difficult to meet the requirements of arranging battery packs of different specifications and positions, resulting in poor scalability and low versatility of the battery pack installation structure.

[0006] The embodiment of the present application provides a vehicle chassis structure for installing a battery pack on a platform, including:

[0007] A vehicle chassis assembly, the vehicle chassis assembly comprising a left sill longitudinal beam and a right sill longitudinal beam which are parallel to each other and spaced apart, a vehicle front floor and a front wall lower cross beam which are fixedly connected between the left sill longitudinal beam and the right sill longitudinal beam, the left sill longitudinal beam, the right sill longitudinal beam, the vehicle front floor and the front wall lower cross beam jointly forming a battery pack accommodation space which opens downward;

[0008] A battery pack mounting assembly, the battery pack mounting assembly comprising a bolt hole located on the lower cross beam of the front panel and a battery pack front mounting bracket connected to the lower cross beam of the front panel, and a battery pack side mounting beam connected to the front floor of the vehicle body, the bolt hole is used for detachable installation of a first battery pack, and the battery pack front mounting bracket and the battery pack side mounting beam are used for jointly detachable installation of a second battery pack.

[0009] In some embodiments: the left and right sides of the front floor of the vehicle body are respectively welded to the left sill longitudinal beam and the right sill longitudinal beam, the front panel is connected to the lower cross beam of the front panel, and the front end of the front floor of the vehicle body is welded to the front panel.

[0010] In some embodiments: the lower cross beam of the dash panel includes an upper cross beam layer and a lower cross beam layer, the upper cross beam layer and the lower cross beam layer are integrally stamped by sheet metal, the upper cross beam layer and the lower cross beam layer are welded and connected to each other on all sides and form a cavity inside;

[0011] The bolt holes are located at both ends of the lower cross beam of the front panel, and the bolt holes include an upper mounting hole opened on the upper cross beam layer and a lower mounting hole opened on the lower cross beam layer. The upper mounting hole and the lower mounting hole are concentrically arranged with each other and are connected to each other by a bushing tube for inserting bolts.

[0012] In some embodiments: the second battery pack includes a large hybrid vehicle battery pack and a small hybrid vehicle battery pack, and the mounting bracket includes a battery pack left mounting frame and a battery pack right mounting frame for detachably connecting the large hybrid vehicle battery pack, and a battery pack side mounting frame for detachably connecting the small hybrid vehicle battery pack.

[0013] In some embodiments: the left battery pack mounting frame is connected to the rear side of the left end of the lower cross beam of the front panel by welding or detachable connection, and the right battery pack mounting frame is connected to the rear side of the right end of the lower cross beam of the front panel by welding or detachable connection, and the left battery pack mounting frame and the right battery pack mounting frame are both provided with bolt mounting holes for connecting the large battery pack of the hybrid vehicle.

[0014] In some embodiments: the length of the large battery pack of the hybrid vehicle is greater than the length of the small battery pack of the hybrid vehicle, and the battery pack side mounting frame is connected to the rear side of the lower cross beam of the front wall panel by welding or detachably;

[0015] The length of the battery pack side mounting frame is greater than the length of the battery pack left mounting frame and the battery pack right mounting frame, so that the distance between the front end of the small battery pack of the hybrid vehicle and the lower cross beam of the front panel is greater than the distance between the front end of the large battery pack of the hybrid vehicle and the lower cross beam of the front panel.

[0016] In some embodiments: the second battery pack includes a large hybrid vehicle battery pack and a small hybrid vehicle battery pack, the left sides of the large hybrid vehicle battery pack and the small hybrid vehicle battery pack are both detachably connected to the left door sill longitudinal beam, and the right sides of the large hybrid vehicle battery pack and the small hybrid vehicle battery pack are both connected to the battery pack side mounting beam.

[0017] In some embodiments: the length of the large battery pack of the hybrid vehicle is greater than the length of the small battery pack of the hybrid vehicle, the width of the large battery pack of the hybrid vehicle is equal to the width of the small battery pack of the hybrid vehicle, and the thickness of the large battery pack of the hybrid vehicle is greater than the thickness of the small battery pack of the hybrid vehicle;

[0018] The battery pack side mounting beam includes a first battery pack side mounting beam for connecting a large battery pack of a hybrid vehicle, and a second battery pack side mounting beam for connecting a small battery pack of a hybrid vehicle. The length and height of the first battery pack side mounting beam are both greater than the length and height of the second battery pack side mounting beam.

[0019] In some embodiments: the first battery pack side mounting beam and the second battery pack side mounting beam are connected to the front floor of the vehicle body by welding or detachably, and a longitudinal channel for accommodating the exhaust pipe is formed between the first battery pack side mounting beam and the second battery pack side mounting beam and the right door sill longitudinal beam.

[0020] In some embodiments: the front floor of the vehicle body includes a left floor and a right floor, and a middle channel connected between the left floor and the right floor, the cross-section of the middle channel is a "U"-shaped structure with an opening facing downward, and the rear ends of the left floor, the right floor and the middle channel are connected to the rear cross beam of the front floor.

[0021] The beneficial effects of the technical solution provided by this application include:

[0022] An embodiment of the present application provides a vehicle chassis structure for installing a battery pack in a platform-based manner. Since the vehicle chassis structure of the present application is provided with a body chassis assembly, the body chassis assembly includes a left sill longitudinal beam and a right sill longitudinal beam which are parallel to each other and spaced apart, a body front floor and a front panel lower cross beam which are fixedly connected between the left sill longitudinal beam and the right sill longitudinal beam, the left sill longitudinal beam, the right sill longitudinal beam, the body front floor and the front panel lower cross beam jointly form a battery pack accommodating space which opens downward; a battery pack mounting assembly, the battery pack mounting assembly includes a bolt hole located on the front panel lower cross beam and a battery pack front mounting bracket connected to the front panel lower cross beam, and a battery pack side mounting beam connected to the body front floor, the bolt hole is used for detachably installing a first battery pack, and the battery pack front mounting bracket and the battery pack side mounting beam are used for detachably installing a second battery pack together.

[0023] Therefore, the vehicle chassis structure of the present application has bolt holes for the first battery pack on the lower cross beam of the dash panel, a battery pack front mounting bracket connected to the lower cross beam of the dash panel for fixing the second battery pack, and a battery pack side mounting beam connected to the front floor of the vehicle body for fixing the second battery pack. The dash panel lower cross beam, the left sill longitudinal beam and the right sill longitudinal beam together provide a mounting support structure for the battery pack of the pure electric vehicle. The dash panel lower cross beam, the left sill longitudinal beam and the right sill longitudinal beam, the battery pack front mounting bracket and the battery pack side mounting beam together provide a mounting support structure for the second battery pack. By adding or removing the battery pack front mounting bracket and the battery pack side mounting beam on the vehicle body chassis assembly, it is possible to switch between installing battery packs of different models, effectively reducing the differences between pure electric vehicles and hybrid vehicles, reducing the difficulty of parts management and the requirements for production switching, and greatly reducing R&D and management costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the structure of a pure electric vehicle battery pack installed in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of the structure of a large battery pack for a hybrid vehicle installed in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of the structure of a small battery pack for a hybrid vehicle installed in an embodiment of the present application;

[0028] Figure 4 This is a schematic diagram of the structure of installing a left battery pack mounting frame and a right battery pack mounting frame on the lower cross beam of the dash panel according to an embodiment of the present application;

[0029] Figure 5 This is a schematic diagram of the structure of the first battery pack side mounting beam installed on the front floor of the vehicle body according to the embodiment of the present application;

[0030] Figure 6 This is a schematic diagram of the structure of installing the battery pack side mounting beam on the lower cross beam of the front wall panel according to the embodiment of the present application;

[0031] Figure 7 This is a schematic diagram of the structure of the second battery pack side mounting beam installed on the front floor of the vehicle body in an embodiment of the present application.

[0032] Reference numerals:

[0033] 1. Lower cross beam of the front panel; 2. Left mounting bracket of the battery pack; 3. Right mounting bracket of the battery pack; 4. Side mounting bracket of the battery pack; 5. Left door sill longitudinal beam; 6. Right door sill longitudinal beam; 7. Side mounting beam of the second battery pack; 8. Front floor of the vehicle body; 9. Front panel; 10. Battery pack of pure electric vehicle; 11. Large battery pack of hybrid vehicle; 12. Small battery pack of hybrid vehicle; 13. Bolt hole at the left end; 14. Bolt hole at the right end; 15. Side mounting beam of the first battery pack. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0035] The embodiments of the present application provide a vehicle chassis structure for installing a battery pack on a platform, which can solve the problem in the related art that the battery pack installation structure is difficult to meet the requirements of arranging battery packs of different specifications and positions, resulting in poor scalability and low versatility of the battery pack installation structure.

[0036] See also Figures 1 to 5 As shown, the embodiment of the present application provides a vehicle chassis structure for installing a battery pack on a platform, including:

[0037] The vehicle body chassis assembly includes a left sill longitudinal beam 5 and a right sill longitudinal beam 6 which are parallel to each other and spaced apart, a vehicle body front floor 8 and a front panel lower cross beam 1 which are fixedly connected between the left sill longitudinal beam 5 and the right sill longitudinal beam 6, and the left sill longitudinal beam 5, the right sill longitudinal beam 6, the vehicle body front floor 8 and the front panel lower cross beam 1 together form a battery pack accommodating space with an opening facing downward.

[0038] A battery pack mounting assembly includes a bolt hole on the dash panel lower cross beam 1, a battery pack front mounting bracket connected to the dash panel lower cross beam 1, and a battery pack side mounting beam connected to the vehicle body front floor 8, wherein the bolt hole is used for detachably mounting the first battery pack 10, and the battery pack front mounting bracket and the battery pack side mounting beam are used for detachably mounting the second battery pack together.

[0039] The vehicle chassis structure of the present application is provided with bolt holes on the lower cross beam 1 of the front panel for detachably connecting the first battery pack 10, the first battery pack 10 is preferably but not limited to a pure electric vehicle battery pack, and a battery pack front mounting bracket connected to the lower cross beam 1 of the front panel for detachably connecting the second battery pack, and a battery pack side mounting beam connected to the front floor 8 of the vehicle body for detachably connecting the second battery pack.

[0040] The dash panel lower cross beam 1, the left sill longitudinal beam 5 and the right sill longitudinal beam 6 together provide a mounting support structure for the first battery pack 10. The dash panel lower cross beam 1, the left sill longitudinal beam 5 and the right sill longitudinal beam 6, the battery pack front mounting bracket and the battery pack side mounting beam together provide a mounting support structure for the second battery pack.

[0041] The embodiment of the present application can switch to install battery packs of different models by adding or removing the front mounting bracket and the side mounting beam of the battery pack on the chassis assembly, effectively reducing the difference between pure electric vehicles and hybrid vehicles, reducing the difficulty of parts management and production switching requirements, and greatly reducing R&D and management costs.

[0042] In some alternative embodiments: See Figures 1 to 3 As shown, the embodiment of the present application provides a vehicle chassis structure for installing a battery pack on a platform, wherein the left and right sides of the vehicle body front floor 8 of the vehicle chassis structure are respectively welded to the left sill longitudinal beam 5 and the right sill longitudinal beam 6. A front wall 9 is connected to the lower cross beam 1 of the front wall, and the front end of the vehicle body front floor 8 is welded to the front wall 9 and the lower cross beam 1 of the front wall.

[0043] The front floor 8 of the vehicle body includes a left floor and a right floor, and a middle channel connected between the left floor and the right floor. The cross section of the middle channel is a "U"-shaped structure with an opening facing downward. The rear end of the left floor, the right floor and the middle channel is connected with a front floor rear cross beam. The top of the left floor and the right floor are both provided with a front seat mounting cross beam.

[0044] The middle channel is located between the left floor and the right floor to form a middle longitudinal beam, which is used to improve the longitudinal rigidity of the chassis assembly. The front seat mounting cross beam and the front floor rear cross beam are used to improve the lateral rigidity of the chassis assembly. The front ends of the left floor, the right floor and the middle channel are welded to connect the front ends with the front wall panel 9 and the lower cross beam 1 of the front wall panel.

[0045] In some alternative embodiments: See Figure 4 As shown, an embodiment of the present application provides a vehicle chassis structure for installing a battery pack on a platform, wherein a lower cross beam 1 of a front panel of the vehicle chassis structure includes an upper cross beam layer and a lower cross beam layer, both of which are integrally stamped from sheet metal, and the upper cross beam layer and the lower cross beam layer are welded to each other on all sides and a cavity is formed inside.

[0046] The bolt holes include a left bolt hole 13 located at the left end of the dash panel lower cross beam 1, and a right bolt hole 14 located at the right end of the dash panel lower cross beam 1. Two left bolt holes 13 and two right bolt holes 14 are arranged at intervals along the width direction of the vehicle body on the dash panel lower cross beam 1. The front end of the first battery pack 10 is directly inserted into the left bolt hole 13 and the right bolt hole 14 by bolts and then fixedly connected to the dash panel lower cross beam 1.

[0047] The left end bolt hole 13 and the right end bolt hole 14 each include an upper mounting hole respectively opened on the upper cross beam layer and a lower mounting hole respectively opened on the lower cross beam layer, the upper mounting hole and the lower mounting hole are concentrically arranged and connected to each other up and down, and a bushing tube for inserting bolts is connected between the upper and lower mounting holes. The bushing tube is used to vertically support the upper and lower cross beam layers to enhance the structural strength of the connection position between the left end bolt hole 13 and the right end bolt hole 14 and the first battery pack 10.

[0048] In some alternative embodiments: See Figures 2 to 4 and Figure 6 As shown, the embodiment of the present application provides a vehicle chassis structure for installing a battery pack on a platform, wherein the second battery pack of the vehicle chassis structure includes a large hybrid vehicle battery pack 11 and a small hybrid vehicle battery pack 12. The mounting bracket includes a battery pack left mounting bracket 2 and a battery pack right mounting bracket 3 for detachably connecting the large hybrid vehicle battery pack 11, and a battery pack side mounting bracket 4 for detachably connecting the small hybrid vehicle battery pack 12.

[0049] The left battery pack mounting frame 2 is detachably connected to the rear side of the left end of the lower cross beam 1 of the front wall panel by welding or fasteners, and the right battery pack mounting frame 3 is detachably connected to the rear side of the right end of the lower cross beam 1 of the front wall panel by welding or fasteners. Bolt mounting holes for connecting the large battery pack 11 of the hybrid vehicle are provided on the left battery pack mounting frame 2 and the right battery pack mounting frame 3. The fasteners are preferably, but not limited to, bolts or rivets.

[0050] When the large hybrid battery pack 11 is to be installed on the dash panel lower cross beam 1, the left battery pack mounting frame 2 and the right battery pack mounting frame 3 only need to be fastened or welded to the dash panel lower cross beam 1. When the small hybrid battery pack 12 is to be installed on the dash panel lower cross beam 1, the side battery pack mounting frame 4 only needs to be fastened or welded to the dash panel lower cross beam 1. When the first battery pack 10 is to be installed on the dash panel lower cross beam 1, the left battery pack mounting frame 2, the right battery pack mounting frame 3 and the side battery pack mounting frame 4 do not need to be installed on the dash panel lower cross beam 1.

[0051] In some alternative embodiments: See Figures 2 to 4 and Figure 6 As shown, an embodiment of the present application provides a vehicle chassis structure for installing a battery pack in a platform-based manner, wherein the length of a large battery pack 11 of a hybrid vehicle in the vehicle chassis structure is greater than the length of a small battery pack 12 of a hybrid vehicle, and the weight of the large battery pack 11 of the hybrid vehicle is significantly greater than the weight of the small battery pack 12 of the hybrid vehicle.

[0052] Therefore, the front end of the large battery pack 11 of the hybrid vehicle needs the left battery pack mounting frame 2 and the right battery pack mounting frame 3 to be fixed on the lower cross beam 1 of the front panel, and the front end of the small battery pack 12 of the hybrid vehicle only needs the side battery pack mounting frame 4 to be fixed on the lower cross beam 1 of the front panel, so that the large battery pack 11 of the hybrid vehicle or the small battery pack 12 of the hybrid vehicle can be stably mounted on the lower cross beam 1 of the front panel. The length of the embodiment of the present application is the length direction of the vehicle body, the width is the width direction of the vehicle body, and the thickness is the height direction of the vehicle body.

[0053] The battery pack side mounting frame 4 is detachably connected to the rear side of the dash panel lower cross beam 1 by welding or by fasteners. The length of the battery pack side mounting frame 4 is greater than the length of the battery pack left mounting frame 2 and the battery pack right mounting frame 3, so that the distance between the front end of the small battery pack 12 of the hybrid vehicle and the dash panel lower cross beam 1 is greater than the distance between the front end of the large battery pack 11 of the hybrid vehicle and the dash panel lower cross beam 1.

[0054] Since the length of the large battery pack 11 of the hybrid vehicle is greater than the length of the small battery pack 12 of the hybrid vehicle, the thickness of the large battery pack 11 of the hybrid vehicle is greater than the thickness of the small battery pack 12 of the hybrid vehicle, and the width of the large battery pack 11 of the hybrid vehicle is equal to the width of the small battery pack 12 of the hybrid vehicle, the weight of the large battery pack 11 of the hybrid vehicle is significantly greater than the weight of the small battery pack 12 of the hybrid vehicle, and the battery capacity of the large battery pack 11 of the hybrid vehicle is greater than the capacity of the small battery pack 12 of the hybrid vehicle.

[0055] In order to locate the center of mass of the vehicle chassis at the center of the vehicle chassis and improve the stability of the vehicle body, the embodiment of the present application makes the distance between the front end of the small battery pack 12 of the hybrid vehicle and the lower cross beam 1 of the front panel greater than the distance between the front end of the large battery pack 11 of the hybrid vehicle and the lower cross beam 1 of the front panel. That is, the installation position of the small battery pack 12 of the hybrid vehicle is moved backward relative to the large battery pack 11 of the hybrid vehicle, and the length of the battery pack side mounting frame 4 is correspondingly made greater than the lengths of the left battery pack mounting frame 2 and the right battery pack mounting frame 3.

[0056] Those skilled in the art may also make the distance between the front end of the small battery pack 12 of the hybrid vehicle and the lower cross beam 1 of the front panel equal to the distance between the front end of the large battery pack 11 of the hybrid vehicle and the lower cross beam 1 of the front panel, and thus the front end of the small battery pack 12 of the hybrid vehicle and the front end of the large battery pack 11 of the hybrid vehicle may be installed on the lower cross beam 1 of the front panel using the common battery pack left mounting frame 2 and the battery pack right mounting frame 3, thereby eliminating the battery pack side mounting frame 4.

[0057] In some alternative embodiments: See Figure 2 , Figure 3 , Figure 5 and Figure 7As shown, an embodiment of the present application provides a vehicle chassis structure for installing a battery pack on a platform, wherein a second battery pack of the vehicle chassis structure includes a large hybrid battery pack 11 and a small hybrid battery pack 12, wherein the left sides of the large hybrid battery pack 11 and the small hybrid battery pack 12 are detachably connected to the left door sill longitudinal beam 5, and the right sides of the large hybrid battery pack 11 and the small hybrid battery pack 12 are connected to the battery pack side mounting beam.

[0058] Since the length of the large battery pack 11 of the hybrid vehicle is greater than the length of the small battery pack 12 of the hybrid vehicle, the width of the large battery pack 11 of the hybrid vehicle is equal to the width of the small battery pack 12 of the hybrid vehicle, and the thickness of the large battery pack 11 of the hybrid vehicle is greater than the thickness of the small battery pack 12 of the hybrid vehicle, the weight of the large battery pack 11 of the hybrid vehicle is significantly greater than the weight of the small battery pack 12 of the hybrid vehicle, and the battery capacity of the large battery pack 11 of the hybrid vehicle is greater than the capacity of the small battery pack 12 of the hybrid vehicle.

[0059] The battery pack side mounting beam includes a first battery pack side mounting beam 15 for connecting the large battery pack 11 of the hybrid vehicle, and a second battery pack side mounting beam 7 for connecting the small battery pack 12 of the hybrid vehicle, and the length and height of the first battery pack side mounting beam 15 are greater than the length and height of the second battery pack side mounting beam 7. The length and height of the first battery pack side mounting beam 15 are adapted to the length and thickness of the large battery pack 11 of the hybrid vehicle, and the length and height of the second battery pack side mounting beam 7 are adapted to the length and thickness of the small battery pack 12 of the hybrid vehicle.

[0060] When the chassis assembly needs to be installed with a large hybrid battery pack 11, the first battery pack side mounting beam 15 only needs to be connected or welded to the front floor 8 of the vehicle body through fasteners. When the chassis assembly needs to be installed with a small hybrid battery pack 12, the second battery pack side mounting beam 7 only needs to be connected or welded to the front floor 8 of the vehicle body through fasteners. When the chassis assembly needs to be installed with a first battery pack 10, the first battery pack side mounting beam 15 and the second battery pack side mounting beam 7 do not need to be installed on the front floor 8 of the vehicle body.

[0061] The first battery pack side mounting beam 15 and the second battery pack side mounting beam 7 are detachably connected to the vehicle body front floor 8 by welding or fasteners, and a longitudinal channel for accommodating the exhaust pipe is formed between the first battery pack side mounting beam 15 and the second battery pack side mounting beam 7 and the right door sill longitudinal beam 6. The first battery pack side mounting beam 15 and the second battery pack side mounting beam 7 are both sheet metal integrated stamping structures.

[0062] How it works

[0063] The embodiment of the present application provides a vehicle chassis structure for installing a battery pack in a platform-based manner. Since the vehicle chassis structure of the present application is provided with a body chassis assembly, the body chassis assembly includes a left sill longitudinal beam 5 and a right sill longitudinal beam 6 which are parallel to each other and spaced apart, a body front floor 8 and a front dash lower cross beam 1 which are fixedly connected between the left sill longitudinal beam 5 and the right sill longitudinal beam 6, the left sill longitudinal beam 5, the right sill longitudinal beam 6, the body front floor 8 and the front dash lower cross beam 1 together form a battery pack accommodating space with an opening facing downward; the battery pack mounting assembly includes a bolt hole located on the front dash lower cross beam 1 and a battery pack front mounting bracket connected to the front dash lower cross beam 1, and a battery pack side mounting beam connected to the body front floor 8, the bolt hole is used for detachably installing a first battery pack 10, and the battery pack front mounting bracket and the battery pack side mounting beam are used for detachably installing a second battery pack together.

[0064] Therefore, the vehicle chassis structure of the present application has bolt holes for the first battery pack on the dash panel lower cross beam 1, a battery pack front mounting bracket connected to the dash panel lower cross beam 1 for fixing the second battery pack, and a battery pack side mounting beam connected to the vehicle body front floor 8 for fixing the second battery pack. The dash panel lower cross beam 1, the left sill longitudinal beam 5 and the right sill longitudinal beam 6 together provide a mounting support structure for the first battery pack 10. The dash panel lower cross beam 1, the left sill longitudinal beam 5 and the right sill longitudinal beam 6, the battery pack front mounting bracket and the battery pack side mounting beam together provide a mounting support structure for the second battery pack.

[0065] The present application can switch between installing first battery packs 10 and second battery packs of different sizes by adding or removing a front mounting bracket for the battery pack and a side mounting beam for the battery pack on the vehicle chassis assembly, thereby effectively reducing the differences in chassis structure between pure electric vehicles and hybrid electric vehicles, lowering the difficulty of parts management and the requirements for production switching, and significantly reducing R&D and management costs.

[0066] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0067] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0068] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A vehicle chassis structure for installing a battery pack on a platform, characterized in that: include: A vehicle chassis assembly, the vehicle chassis assembly comprising a left sill longitudinal beam (5) and a right sill longitudinal beam (6) which are parallel to each other and spaced apart, a vehicle body front floor (8) and a front wall lower cross beam (1) which are fixedly connected between the left sill longitudinal beam (5) and the right sill longitudinal beam (6), the left sill longitudinal beam (5), the right sill longitudinal beam (6), the vehicle body front floor (8) and the front wall lower cross beam (1) jointly forming a battery pack accommodating space with an opening facing downward; A battery pack mounting assembly, the battery pack mounting assembly comprising a bolt hole located on the front panel lower cross beam (1) and a battery pack front mounting bracket connected to the front panel lower cross beam (1), and a battery pack side mounting beam connected to the vehicle body front floor (8), the bolt hole being used for detachably mounting a first battery pack (10), and the battery pack front mounting bracket and the battery pack side mounting beam being used together for detachably mounting a second battery pack.

2. The vehicle chassis structure for installing a battery pack on a platform as claimed in claim 1, characterized in that: The left and right sides of the vehicle body front floor (8) are respectively welded to the left sill longitudinal beam (5) and the right sill longitudinal beam (6); the front panel (9) is connected to the front panel lower cross beam (1); and the front end of the vehicle body front floor (8) is welded to the front panel (9).

3. The vehicle chassis structure for installing a battery pack on a platform as claimed in claim 1, characterized in that: The lower cross beam (1) of the front wall panel comprises an upper cross beam layer and a lower cross beam layer, the upper cross beam layer and the lower cross beam layer are integrally stamped and formed by sheet metal, the upper cross beam layer and the lower cross beam layer are welded and connected to each other on all sides and form a cavity inside; The bolt holes are located at both ends of the lower cross beam (1) of the front panel, and the bolt holes include an upper mounting hole opened on the upper cross beam layer and a lower mounting hole opened on the lower cross beam layer. The upper mounting hole and the lower mounting hole are arranged concentrically with each other and are connected to each other by a bushing tube for inserting bolts.

4. A vehicle chassis structure for installing a battery pack on a platform as claimed in any one of claims 1 to 3, characterized in that: The second battery pack comprises a large battery pack (11) for a hybrid vehicle and a small battery pack (12) for a hybrid vehicle, and the mounting bracket comprises a battery pack left mounting frame (2) and a battery pack right mounting frame (3) for detachably connecting the large battery pack (11) for a hybrid vehicle, and a battery pack side mounting frame (4) for detachably connecting the small battery pack (12) for a hybrid vehicle.

5. The vehicle chassis structure for installing a battery pack on a platform as claimed in claim 4, characterized in that: The left battery pack mounting frame (2) is connected to the rear side of the left end of the lower cross beam (1) of the front panel by welding or detachable connection, and the right battery pack mounting frame (3) is connected to the rear side of the right end of the lower cross beam (1) of the front panel by welding or detachable connection, and the left battery pack mounting frame (2) and the right battery pack mounting frame (3) are both provided with bolt mounting holes for connecting a large battery pack (11) of a hybrid vehicle.

6. The vehicle chassis structure for installing a battery pack on a platform as claimed in claim 4, characterized in that: The length of the large hybrid vehicle battery pack (11) is greater than the length of the small hybrid vehicle battery pack (12), and the battery pack side mounting frame (4) is connected to the rear side of the lower cross beam (1) of the front wall panel by welding or in a detachable manner; The length of the battery pack side mounting frame (4) is greater than the length of the battery pack left mounting frame (2) and the battery pack right mounting frame (3), so that the distance between the front end of the small battery pack (12) of the hybrid vehicle and the lower cross beam (1) of the front panel is greater than the distance between the front end of the large battery pack (11) of the hybrid vehicle and the lower cross beam (1) of the front panel.

7. The vehicle chassis structure for installing a battery pack on a platform as claimed in claim 1, characterized in that: The second battery pack comprises a large battery pack (11) for a hybrid vehicle and a small battery pack (12) for a hybrid vehicle, the left sides of the large battery pack (11) for a hybrid vehicle and the small battery pack (12) for a hybrid vehicle are both detachably connected to the left door sill longitudinal beam (5), and the right sides of the large battery pack (11) for a hybrid vehicle and the small battery pack (12) for a hybrid vehicle are both connected to the battery pack side mounting beam.

8. The vehicle chassis structure for installing a battery pack on a platform as claimed in claim 7, characterized in that: The length of the large battery pack (11) of the hybrid vehicle is greater than the length of the small battery pack (12) of the hybrid vehicle, the width of the large battery pack (11) of the hybrid vehicle is equal to the width of the small battery pack (12) of the hybrid vehicle, and the thickness of the large battery pack (11) of the hybrid vehicle is greater than the thickness of the small battery pack (12) of the hybrid vehicle; The battery pack side mounting beam comprises a first battery pack side mounting beam (15) for connecting a large battery pack (11) of a hybrid vehicle, and a second battery pack side mounting beam (7) for connecting a small battery pack (12) of a hybrid vehicle, wherein the length and height of the first battery pack side mounting beam (15) are both greater than the length and height of the second battery pack side mounting beam (7).

9. A vehicle chassis structure for installing a battery pack on a platform as claimed in claim 8, characterized in that: The first battery pack side mounting beam (15) and the second battery pack side mounting beam (7) are connected to the front floor (8) of the vehicle body by welding or in a detachable manner, and a longitudinal channel for accommodating an exhaust pipe is formed between the first battery pack side mounting beam (15), the second battery pack side mounting beam (7) and the right sill longitudinal beam (6).

10. The vehicle chassis structure for installing a battery pack on a platform as claimed in claim 1, characterized in that: The vehicle body front floor (8) comprises a left floor and a right floor, and a middle channel connected between the left floor and the right floor, the cross section of the middle channel is a "U"-shaped structure with the opening facing downward, and the rear ends of the left floor, the right floor and the middle channel are connected to a front floor rear cross beam.

Images