An electric commercial vehicle having a battery pack frame

Abstract

The application belongs to the technical field of electric vehicles, and particularly relates to an electric commercial vehicle with a battery pack frame, which comprises a cab and a chassis, the chassis is provided with the battery pack frame, and the battery pack is assembled into the battery pack frame; the battery pack frame is surrounded by a first cross beam assembly, a second cross beam assembly, a middle longitudinal beam assembly, a left guardrail assembly, a right guardrail assembly, a front baffle assembly, a rear baffle assembly and a reinforcing rod assembly, the middle longitudinal beam assembly divides the battery pack frame into two square battery pack mounting chambers, each battery pack mounting chamber is provided with at least one battery pack, a plurality of inner supports are arranged on the middle longitudinal beam assembly, a plurality of outer supports are arranged on the left guardrail assembly and the right guardrail assembly respectively, and the battery pack is fixed by the inner supports and the outer supports. The battery pack frame of the application is not only a battery pack mounting structure, but also a mounting and fixing structure of vehicle body and chassis parts, the chassis structure is optimized, the weight of the chassis is greatly reduced, and the light weight is realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric vehicles, and particularly relates to an electric commercial vehicle with a battery pack frame. BACKGROUND

[0002] An electric commercial vehicle uses one or more large-capacity battery packs. The more battery packs the vehicle carries and the larger the size of the battery packs, the more electric capacity the vehicle has, and the longer the vehicle's cruising range. In order to improve transportation efficiency, users need more electric capacity to improve efficiency.

[0003] Durability and reliability are the most basic requirements for a chassis when the vehicle is fully loaded. Due to the flexibility of the chassis, the frame will produce bending deformation and torsional deformation during vehicle travel. These deformations directly affect the safety of the battery pack. When the bending stiffness, torsional stiffness, and load-carrying capacity are insufficient, the chassis will directly or quickly fail. At the same time, the chassis needs to have a certain anti-collision ability to protect the safety of the battery pack.

[0004] The existing battery pack mounting structure is basically externally mounted. According to the relative position of the battery pack and the chassis of the vehicle, it is divided into an upper-mounted battery pack and a lower-mounted battery pack. The upper-mounted battery pack is installed above the chassis behind the cab, also known as a rear-mounted battery pack. It is a main installation method for battery packs of modern tractor trucks and other large electric commercial vehicles due to its simple installation. For example, CN220963592U. Since the center of mass is high, it is not conducive to the stability of vehicle operation. The lower-mounted battery pack is installed below the chassis and is a commonly used installation method for battery packs of electric commercial vehicles, especially for small and medium-sized commercial vehicles. For example, CN113302075A, CN109109642B, CN117601965A, and others. The quick-change battery pack is placed below the trapezoidal frame, which is a form of lower-mounted battery pack. For example, CN118544787A, CN118306189A, and others.

[0005] Both the upper-mounted battery pack and the lower-mounted battery pack have two obvious shortcomings. First, the electric capacity of the battery pack is small, which cannot support long-distance cruising. Second, the externally mounted battery pack frame is relatively heavy, which is not conducive to lightweight.

[0006] In order to increase the capacity of the battery pack and reduce the weight, a plate material is used to form the battery pack frame, such as CN115503826A, CN217994115U, and others. The local stress at the connection between the longitudinal beam and the transverse beam of these structures formed by planar plates is very large, which cannot guarantee the reliability of the frame and the safety of the battery pack.

[0007] Therefore, there is an urgent need for an electric commercial vehicle with a battery pack frame, which can arrange a mounting space for multiple large-capacity battery packs, achieve lightweight, and ensure the safety of the battery pack, the reliability of the vehicle carrying operation, and the appropriate protection of the battery pack when subjected to a collision. SUMMARY

[0008] The present application aims to provide an electric commercial vehicle with a battery pack frame, which includes a cab having a driver's seat and mounted above the front of the chassis, and a chassis, and at least one motor and at least one battery pack supplying power to the motor, to solve the problems existing in the background art.

[0009] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0010] An electric commercial vehicle with a battery pack frame, comprising a cab having a driver's seat and mounted above the front of the chassis, and a chassis, and at least one motor and at least one battery pack supplying power to the motor, the chassis having a battery pack frame, the battery pack being assembled into the battery pack frame.

[0011] The battery pack frame comprises a first cross beam assembly, a second cross beam assembly, a middle longitudinal beam assembly, a left guardrail assembly, a right guardrail assembly, a front baffle assembly, a rear baffle assembly, and a reinforcing rod assembly, the front and rear ends of the middle longitudinal beam assembly are connected to the first cross beam assembly and the second cross beam assembly respectively, and form two square spaces with the left guardrail assembly, the right guardrail assembly, the front baffle assembly, the rear baffle assembly, and the reinforcing rod assembly, forming two battery pack mounting chambers separated by the middle longitudinal beam assembly, each battery pack mounting chamber having at least one battery pack.

[0012] Further, the first cross beam assembly is composed of a tubular first left wing side beam, a first tube beam, a first right wing side beam, a left front longitudinal beam, and a right front longitudinal beam.

[0013] The first tube beam has a first mounting plate on the upper middle part and a second mounting plate on the lower middle part, the first left wing side beam is fixedly connected to the left front longitudinal beam, and the first tube beam is fixedly connected to the left front longitudinal beam; the first right wing side beam is fixedly connected to the right front longitudinal beam, and the first tube beam is fixedly connected to the right front longitudinal beam.

[0014] Further, the second cross beam assembly is composed of a tubular second left wing side beam, a second tube beam, a second right wing side beam, a left rear longitudinal beam, and a right rear longitudinal beam.

[0015] The second tube beam middle part upper surface is provided with a third mounting plate, the second tube beam middle part lower surface is provided with a fourth mounting plate, the second left wing side beam is fixedly connected with the left rear longitudinal beam, and the second tube beam is fixedly connected with the left rear longitudinal beam.

[0016] Further, the middle longitudinal beam assembly is composed of a first main middle longitudinal beam, a second main middle longitudinal beam, a hanging plate assembly, a first auxiliary middle longitudinal beam, a second auxiliary middle longitudinal beam, a first inclined reinforcing plate, a second inclined reinforcing plate, a hanging plate assembly, a third inclined reinforcing plate and a fourth inclined reinforcing plate, the first main middle longitudinal beam is fixedly connected with the first mounting plate and the third mounting plate respectively;

[0017] The second main middle longitudinal beam is fixedly connected with the first mounting plate and the third mounting plate respectively, and the first tube beam, the first main middle longitudinal beam, the second main middle longitudinal beam and the second tube beam are fixedly connected;

[0018] The lower end of the first inclined reinforcing plate is connected with the front end of the first auxiliary middle longitudinal beam, the lower end of the third inclined reinforcing plate is connected with the rear end of the first auxiliary middle longitudinal beam, and the first inclined reinforcing plate, the first auxiliary middle longitudinal beam and the third inclined reinforcing plate are fixedly connected;

[0019] The lower end of the second inclined reinforcing plate is connected with the front end of the second auxiliary middle longitudinal beam, the lower end of the fourth inclined reinforcing plate is connected with the rear end of the second auxiliary middle longitudinal beam, and the second inclined reinforcing plate, the second auxiliary middle longitudinal beam and the fourth inclined reinforcing plate are fixedly connected; the upper ends of the first inclined reinforcing plate and the second inclined reinforcing plate are connected with the second mounting plate, and the first inclined reinforcing plate and the second inclined reinforcing plate are fastened on the first tube beam; the upper ends of the third inclined reinforcing plate and the fourth inclined reinforcing plate are connected with the fourth mounting plate, and the third inclined reinforcing plate and the fourth inclined reinforcing plate are fastened on the second tube beam;

[0020] The upper ends of the hanging plate assembly are connected with the first main middle longitudinal beam and the second main middle longitudinal beam respectively on both sides; the lower ends of the hanging plate assembly are connected with the first auxiliary middle longitudinal beam and the second auxiliary middle longitudinal beam respectively on both sides; inner supports are arranged on both sides of the hanging plate assembly, and the inner supports are used for mounting battery packs.

[0021] Further, the left guardrail assembly is composed of an upper left side beam, a lower left side beam, a first left hanging plate, a plurality of first general hanging plates, a second left hanging plate and a left connecting plate, upper ends of the first left hanging plate, the second left hanging plate, the first general hanging plate and the left connecting plate are fixed on the upper left side beam, lower ends of the first left hanging plate, the second left hanging plate, the first general hanging plate and the left connecting plate are fixed on the lower left side beam, a front end of the upper left side beam is connected with the first left wing side beam, a rear end of the upper left side beam is connected with the second left wing side beam, outer supports are arranged on the first left hanging plate, the general hanging plate and the second left hanging plate, and the outer supports are used for mounting battery packs.

[0022] Further, the right guardrail assembly is composed of a right upper side beam, a right lower side beam, a first right hanging plate, a plurality of second general hanging plates, a second right hanging plate, a third right hanging plate and a right connecting plate, upper ends of the first right hanging plate, the second general hanging plate, the second right hanging plate, the third right hanging plate and the right connecting plate are fixed on the right upper side beam, lower ends of the first right hanging plate, the second general hanging plate, the second right hanging plate, the third right hanging plate and the right connecting plate are fixed on the right lower side beam, a front end of the right upper side beam is connected with the first right wing side beam, a rear end of the right upper side beam is connected with the second right wing side beam, the first right hanging plate, the second general hanging plate, the second right hanging plate and the third right hanging plate are provided with outer supports, and the outer supports are used for mounting battery packs.

[0023] Further, the front baffle assembly comprises a front left corner connecting support, a left front baffle, a front middle connecting support, a right front baffle and a right front corner connecting support which are sequentially fixed and connected, the front left corner connecting support is connected with the lower left side beam, the left front baffle is connected with a first lower mounting plate below the first left wing side beam, the right front corner connecting support is connected with the right lower side beam, the right front baffle is connected with a second lower mounting plate below the first right wing side beam, and the front middle connecting support is connected with a first auxiliary middle longitudinal beam and a second auxiliary middle longitudinal beam.

[0024] Further, the rear baffle assembly comprises a rear baffle, a left connecting plate, a right connecting plate, a rear middle connecting support, a rear left corner connecting support and a rear right corner connecting support, lower ends of the left connecting plate and the right connecting plate are connected with the rear baffle, an upper end of the left connecting plate is connected with a third lower mounting plate of the second left wing side beam, an upper end of the right connecting plate is connected with a fourth lower mounting plate of the second right wing side beam, the rear left corner connecting support is connected with the rear baffle and the lower left side beam of the left guardrail assembly, the rear right corner connecting support is connected with the rear baffle and the right lower side beam of the right guardrail assembly, and the rear middle connecting support is connected with the first auxiliary middle longitudinal beam and the second auxiliary middle longitudinal beam.

[0025] Further, the reinforcing rod assembly is composed of several anti-collision reinforcing rods, which connect the middle positions of the left guardrail assembly and the right guardrail assembly with the middle longitudinal beam assembly.

[0026] Further, the battery pack includes battery cells and a shell, flanges with similar distances are arranged on both sides of the shell in the length direction, mounting holes are arranged on the flanges, a threaded blind hole bushing is arranged in each inner mounting hole, and an outer bushing with a through hole is arranged in each outer mounting hole.

[0027] The beneficial effects of the present application are:

[0028] 1. The present application provides two square battery pack mounting rooms, the battery pack mounting room can accommodate multiple layers of battery packs, fully utilizes the space in the Z-axis direction, expands the storage space, facilitates the arrangement of more battery packs, increases the battery capacity, and improves the endurance of the electric commercial vehicle.

[0029] 2. The first cross beam assembly and the second cross beam assembly adopt a circular tube structure, which can sufficiently reduce the stress generated by bending and torsion of the vehicle, and ensure the reliability and carrying capacity of the vehicle.

[0030] 3. The battery pack frame is both a battery pack mounting structure and a vehicle body and chassis part mounting and fixing structure, optimizes the chassis structure, greatly reduces the weight of the chassis, and realizes lightweight.

[0031] 4. The front longitudinal beam of the first cross beam assembly extends forward along the X direction, and can mount a front axle, a steering gear, and a wheel; the rear longitudinal beam of the second cross beam assembly extends rearward along the X direction, and can mount a rear tube beam, a rear suspension, and a drive axle.

[0032] 5. The frame of the present application is provided with an anti-collision reinforcing rod assembly, which ensures the safety of the vehicle in a collision. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a side view of a commercial vehicle according to an embodiment of the present application.

[0034] Figure 2 It is Figure 1 a top view of a middle chassis having a battery mounting structure.

[0035] Figure 3 It is Figure 2 an M-M sectional view of the commercial vehicle.

[0036] Figure 4 It is Figure 3 an enlarged view of I of the commercial vehicle.

[0037] Figure 5 It is Figure 3 an enlarged view of II of the commercial vehicle.

[0038] Figure 6 It isFigure 2 Schematic view of a middle battery pack frame.

[0039] Figure 7 Is Figure 6 A front view.

[0040] Figure 8 Is Figure 6 A rear view.

[0041] Figure 9 Is a first cross beam assembly schematic view.

[0042] Figure 10 Is a middle longitudinal beam assembly schematic view.

[0043] Figure 11 Is a second cross beam assembly schematic view.

[0044] Figure 12 Is a first tube beam and a second tube beam schematic view.

[0045] Figure 13 Is a right guard rail assembly schematic view.

[0046] Figure 14 Is a left guard rail assembly schematic view.

[0047] Figure 15 Is a front bumper assembly schematic view.

[0048] Figure 16 Is a rear bumper assembly schematic view.

[0049] Figure 17 Is a crash reinforcement bar assembly schematic view.

[0050] BRIEF DESCRIPTION OF DRAWINGS:

[0051] 1. cab; 2. chassis; 3. front axle; 4. steering gear; 5. front suspension; 6. battery pack frame; 7. battery pack; 8. rear tube beam; 9. rear suspension; 10. drive axle; 11. inner support; 12. inner flange; 13. blind hole sleeve; 14. outer flange; 15. outer support; 16. outer sleeve; 20. first cross beam assembly; 21. first tube beam; 211. first mounting plate; 212. second mounting plate; 22. first left wing side beam; 221. first lower mounting plate; 23. first right wing side beam; 231. second lower mounting plate; 24. left front longitudinal beam; 25. right front longitudinal beam; 30. middle longitudinal beam assembly; 31. first main middle longitudinal beam; 32. second main middle longitudinal beam; 33. first auxiliary middle longitudinal beam; 34. second auxiliary middle longitudinal beam; 35. front inclined reinforcement plate; 36. hanging plate assembly; 37. rear inclined reinforcement plate; 40. second cross beam assembly; 41. second tube beam; 411. third mounting plate; 412. fourth mounting plate; 42. second left wing side beam; 421. third lower mounting plate; 43. second right wing side beam; 431. fourth lower mounting plate; 44. left rear longitudinal beam; 45. right rear longitudinal beam; 50. right guardrail assembly; 51. right upper side beam; 52. right lower side beam; 53. first right hanging plate; 54. universal hanging plate; 55. second right hanging plate; 56. third right hanging plate; 57. right connecting plate; 60. left guardrail assembly; 61. upper left side beam; 62. lower left side beam; 63. first left hanging plate; 64. left connecting plate; 65. second left hanging plate; 70. front bumper assembly; 71. left front bumper; 72. right front bumper; 73. front middle connecting support; 74. front left corner connecting support; 75. right front corner connecting support; 80. rear bumper assembly; 81. rear bumper; 82. left connecting plate; 83. right connecting plate; 84. rear middle connecting support; 85. rear left corner connecting support; 86. rear right corner connecting support; 90. anti-collision reinforcement rod assembly; 91. first anti-collision reinforcement rod; 92. second anti-collision reinforcement rod; 93. third anti-collision reinforcement rod. DETAILED DESCRIPTION

[0052] The technical solutions of the present application will be described in detail below with reference to the drawings. The following examples are only exemplary and can only be used to explain and illustrate the technical solutions of the present application, but cannot be interpreted as a limitation of the technical solutions of the present application.

[0053] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0054] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0056] In the description herein, it should be understood that the terms "up", "down", "left", "right", and the like orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", are only used to distinguish in the description, and have no special meaning.

[0057] In the description of the present application, the description referring to the terms "an embodiment", "an example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0058] The technical solutions of the present application will be further described below in conjunction with the drawings and through specific embodiments.

[0059] The present embodiment provides an electric commercial vehicle with a battery pack frame, which comprises a cab 1, a chassis 2, a front axle 3, a steering device 4, a front suspension 5, a battery pack frame 6, a battery pack 7, a rear tube beam 8, a rear suspension 9, a drive axle 10 and other necessary parts. Since the present application is only directed to the improvement of the battery pack frame structure of the commercial vehicle, the other parts of the commercial vehicle will not be described in detail; the chassis has a battery pack frame on the upper front part of the chassis. Figure 1A side view of an electric commercial vehicle according to an embodiment of the present application, Figure 2 A side view of an electric commercial vehicle according to an embodiment of the present application, Figure 1 A top view of a middle chassis having a battery pack and a battery pack frame structure, Figure 3 A side view of an electric commercial vehicle according to an embodiment of the present application, Figure 4 A side view of an electric commercial vehicle according to an embodiment of the present application, 5 A side view of an electric commercial vehicle according to an embodiment of the present application, A side view of an electric commercial vehicle according to an embodiment of the present application,

[0060] A side view of an electric commercial vehicle according to an embodiment of the present application, Figures 6 to 8 A side view of an electric commercial vehicle according to an embodiment of the present application, The battery pack frame 6 comprises a first cross beam assembly 20, a middle longitudinal beam assembly 30, a second cross beam assembly 40, a right guardrail assembly 50, a left guardrail assembly 60, a front baffle assembly 70, a rear baffle assembly 80, and a crash reinforcement rod assembly 90. The first cross beam assembly 20 and the second cross beam assembly 40 extend along the transverse direction (Y) at a certain distance from each other along the longitudinal direction (X), are fixed together with the middle longitudinal beam assembly 30, and enclose a square space with the left guardrail assembly 60, the right guardrail assembly 50, the front baffle assembly 70, the rear baffle assembly 80, and the reinforcement rod assembly 90, forming two battery pack mounting chambers symmetrical in the XZ plane, each of which has at least one battery pack 7. A plurality of inner supports 11 are assembled on the middle longitudinal beam assembly 30 of the battery pack frame 6, and a plurality of outer supports 15 are assembled on the right guardrail assembly 50 and the left guardrail assembly 60, respectively. The battery pack 7 is fixed on the inner supports 11 and the outer supports 15. The number of layers of the inner supports 11 and the outer supports 15 corresponds to the number of battery packs, and the number of the inner supports 11 and the outer supports 15 is related to the weight and volume of the battery packs and is determined according to the strength bearing. In this embodiment, there are three layers of battery packs, and each of the inner supports 11 and the outer supports 15 has three layers. Each battery pack 7 has five mounting holes on both sides.

[0061] A side view of an electric commercial vehicle according to an embodiment of the present application, Figures 9 to 17 A side view of an electric commercial vehicle according to an embodiment of the present application,

[0062] The first beam assembly 20 is composed of a first tube beam 21, a first left wing side beam 22, a first right wing side beam 23, a left front longitudinal beam 24 and a right front longitudinal beam 25. The inner side of the first left wing side beam 22 and the first right wing side beam 23 is provided with a large mounting surface, and the outer side is provided with a small mounting surface. A plurality of bolt through holes are arranged on the mounting surfaces. The first left wing side beam 22 is provided with a first lower mounting plate 221, and the first right wing side beam 23 is provided with a second lower mounting plate 231. The first tube beam 21 is a symmetrical hollow structure, and is provided with a mounting surface at both ends. A plurality of bolt through holes are arranged on the mounting surface. The first tube beam 21 is provided with a first mounting plate 211 and a second mounting plate 212 in the middle. The two surfaces of the first mounting plate 211 and the second mounting plate 212 are parallel mounting surfaces, and are provided with a plurality of bolt through holes. The mounting surface of the first left wing side beam 22 is attached to the outer abdominal surface of the left front longitudinal beam 24, the left end surface of the first tube beam 21 is attached to the inner abdominal surface of the left front longitudinal beam 24, and a plurality of bolts and nuts are fastened. Similarly, the mounting surface of the first right wing side beam 23 is attached to the outer abdominal surface of the right front longitudinal beam 25, the right end surface of the first tube beam 21 is attached to the inner abdominal surface of the right front longitudinal beam 25, and a plurality of bolts and nuts are fastened.

[0063] The second beam assembly 40 is composed of a second tube beam 41, a second left wing side beam 42, a second right wing side beam 43, a left rear longitudinal beam 44 and a right rear longitudinal beam 45. The inner side of the second left wing side beam 42 and the second right wing side beam 43 is provided with a mounting surface, and a plurality of bolt through holes are arranged on the mounting surface. The second left wing side beam 42 is provided with a third lower mounting plate 421, and the second right wing side beam 43 is provided with a fourth lower mounting plate 431. The second tube beam 41 is provided with a mounting surface at both ends, and a plurality of bolt through holes are arranged on the mounting surface. The second tube beam 41 is provided with a third mounting plate 411 and a fourth mounting plate 412 in the middle. The two surfaces of the third mounting plate 411 and the fourth mounting plate 412 are parallel mounting surfaces, and are provided with a plurality of bolt through holes. The mounting surface of the second left wing side beam 42 is attached to the outer abdominal surface of the left rear longitudinal beam 44, the left end surface of the second tube beam 41 is attached to the inner abdominal surface of the left rear longitudinal beam 44, and a plurality of bolts and nuts are fastened. Similarly, the mounting surface of the second right wing side beam 43 is attached to the outer abdominal surface of the right rear longitudinal beam 45, the right end surface of the second tube beam 41 is attached to the inner abdominal surface of the right rear longitudinal beam 45, and a plurality of bolts and nuts are fastened.

[0064] The middle longitudinal beam assembly 30 is composed of a first main middle longitudinal beam 31, a second main middle longitudinal beam 32, a first auxiliary middle longitudinal beam 33, a second auxiliary middle longitudinal beam 34, a diagonal reinforcing plate 35 and a hanging plate assembly 36. The first main middle longitudinal beam 31 and the second main middle longitudinal beam 32 are back to back, with the hanging plate assembly 36 in between. The front end is attached to the first mounting plate 211 of the first tube beam 21, and the rear end is attached to the third mounting plate 411 of the second tube beam 41, and a plurality of bolts and nuts are fastened.

[0065] Similarly, the first secondary middle longitudinal beam 33 and the second secondary middle longitudinal beam 34 sandwich the hanging plate assembly 36, the front end is attached to the second mounting plate 212 of the first tube beam 21 through the oblique reinforcement plate 35 on the front side, and the rear end is attached to the fourth mounting plate 412 on the second tube beam 41 through the oblique reinforcement plate 35 on the rear side. In this way, the entire middle part forms a high-stiffness frame structure with a high Z-direction height; at the same time, the first main middle longitudinal beam 31 and the second main middle longitudinal beam 32 have a larger cross section than the first secondary middle longitudinal beam 33 and the second secondary middle longitudinal beam 34, forming a structure with strong upper part and weak lower part, which ensures the load bearing while reducing the overall weight.

[0066] The upper ends of the hanging plate assemblies 36 are attached to the web surfaces of the first main middle longitudinal beam 31 and the second main middle longitudinal beam 32 on both sides and are fastened by a plurality of bolts and nuts; the lower ends of the hanging plate assemblies 36 are attached to the web surfaces of the first secondary middle longitudinal beam 33 and the second secondary middle longitudinal beam 34 on both sides and are fastened by a plurality of bolts and nuts; the hanging plate assemblies 36 are spaced at a similar distance; the inner supports 11 are installed on both sides of the hanging plate assemblies 36, each inner support 11 is provided with a vertical Y-direction mounting surface and a vertical Z-direction mounting surface, the vertical Y-direction mounting surface is provided with a plurality of Y-direction through holes, and the vertical Z-direction mounting surface is provided with a Z-direction through hole, the Y-direction through holes are used to fix the inner supports 11, and the Z-direction through hole is used to install the battery pack 7.

[0067] The right guardrail assembly 50 is composed of a right upper edge beam 51, a right lower edge beam 52, a first right hanging plate 53, a universal hanging plate 54, a second right hanging plate 55, and a third right hanging plate 56, and the total number of hanging plates corresponds to the number of hanging plates of the middle longitudinal beam hanging plate assembly; the right upper edge beam 51 and the right lower edge beam 52 are connected by a plurality of hanging plates to form a whole, wherein the right upper edge beam 51 has a larger cross section and thickness than the right lower edge beam 52, forming a structure with strong upper part and weak lower part, which ensures the load bearing while reducing the overall weight; the front end of the right upper edge beam 51 is connected to the outer small mounting surface of the first right wing edge beam 23, and the rear end of the right upper edge beam 51 is connected to the outer small mounting surface of the second right wing edge beam 43, so that the right guardrail assembly 50 is connected to the first cross beam assembly 20 and the second cross beam assembly 40.

[0068] The left guardrail assembly 60 is composed of an upper left edge beam 61, a lower left edge beam 62, a first left hanging plate 63, a universal hanging plate 54, and a second left hanging plate 65, and the total number of hanging plates corresponds to the number of hanging plates of the middle longitudinal beam hanging plate assembly; the whole can be symmetrical to the right guardrail assembly 50; the front end of the upper left edge beam 61 is connected to the outer small mounting surface of the first left wing edge beam 22, and the rear end of the upper left edge beam 61 is connected to the outer small mounting surface of the second left wing edge beam 42, so that the left guardrail assembly 60 is connected to the first cross beam assembly 20 and the second cross beam assembly 40.

[0069] The outer support 15 is arranged on the first left hanging plate 63, the second left hanging plate 65, the first right hanging plate 53, the universal hanging plate 54, the second right hanging plate 55 and the third right hanging plate 56 respectively, and the number of the outer support 15 on each piece is the same as the number of layers of the battery pack 7; each outer support 15 is provided with a vertical Y-direction mounting surface and a vertical Z-direction mounting surface, the vertical Y-direction mounting surface is provided with a plurality of Y-direction through holes, and the vertical Z-direction mounting surface is provided with a Z-direction through hole, the Y-direction through holes are used for fixing the outer support 15, and the Z-direction through hole is used for mounting the battery pack 7.

[0070] The front baffle assembly 70 is composed of a left front baffle 71, a right front baffle 72, a front middle connecting support 73, a front left corner connecting support 74 and a right front corner connecting support 75; the left front baffle 71 is connected with the lower left side beam 62 of the left guardrail assembly 60 through the front left corner connecting support 74, and the right front baffle 72 is connected with the right lower side beam 52 of the right guardrail assembly 50 through the right front corner connecting support 75; the inner sides of the left front baffle 71 and the right front baffle 72 are fastened with the front middle connecting support 73, the front middle connecting support 73 is attached to the web surfaces of the first auxiliary middle longitudinal beam 33 and the second auxiliary middle longitudinal beam 34, and the front middle connecting support 73 is fastened together with the front ends of the first auxiliary middle longitudinal beam 33 and the second auxiliary middle longitudinal beam 34 and the two inclined reinforcing plates 35, so that the front baffle assembly 70 is connected with the middle longitudinal beam assembly 30; at the same time, the upper part of the left front baffle 71 is fastened with the first lower mounting plate 221 of the first left wing side beam 22, and the upper part of the right front baffle 72 is fastened with the second lower mounting plate 231 of the first right wing side beam 23.

[0071] The rear baffle assembly 80 is composed of a rear baffle 81, a left connecting plate 82, a right connecting plate 83, a middle connecting support 84, a rear left corner connecting support 85 and a rear right corner connecting support 86; the rear baffle 81 is connected with the lower left side beam 62 of the left guardrail assembly 60 through the rear left corner connecting support 85 and is connected with the right lower side beam 52 of the right guardrail assembly 50 through the rear right corner connecting support 86; the middle connecting support 84 is attached to the web surfaces of the first auxiliary middle longitudinal beam 33 and the second auxiliary middle longitudinal beam 34, and the middle connecting support 84 is fastened together with the rear ends of the first auxiliary middle longitudinal beam 33 and the second auxiliary middle longitudinal beam 34 and the two inclined reinforcing plates 35, so that the rear baffle assembly 80 is connected with the middle longitudinal beam assembly 30; at the same time, the rear baffle 81 is fastened with the third lower mounting plate 421 of the second left wing side beam 42 through the left connecting plate 82, and the right connecting plate 83 is fastened with the fourth lower mounting plate 431 of the second right wing side beam 43.

[0072] The anti-collision reinforcing rod assembly 90 is composed of four first anti-collision reinforcing rods 91, four second anti-collision reinforcing rods 92 and one third anti-collision reinforcing rod 93; the reinforcing rod assembly 90 directly connects the positions with weak rigidity in the middle part of the left guardrail assembly 60 and the right guardrail assembly 50 with the middle longitudinal beam assembly 30, improves the rigidity of the frame structure formed in front, and simultaneously forms effective lateral protection for the installed battery pack.

[0073] The above connections form a battery pack frame 6 for mounting battery packs 7, consisting of the first crossbeam assembly 20, the second crossbeam assembly 40, the middle longitudinal beam assembly 30, the right guardrail assembly 50, the left guardrail assembly 60, the front baffle assembly 70, the rear baffle assembly 80, and the anti-collision reinforcement bar assembly 90. The battery pack frame 6 has two symmetrical square battery pack mounting chambers, each capable of mounting at least one battery pack 7.

[0074] The battery pack 7 includes a battery cell and a housing. Flanges with similar distances are provided on both sides of the housing along its length. Mounting holes are provided on the flanges. Each inner mounting hole is provided with a threaded blind hole bushing 13, and each outer mounting hole is provided with an outer sleeve 16 with a through hole.

[0075] like Figure 3 As shown, the inner and outer sides of the battery pack 7 are placed on the inner bracket 11 and the outer bracket 15 respectively. The inner side is fixed by bolts passing through the Z-direction through hole of the inner bracket 11 and screwing into the blind hole bushing 13. The outer side is fixed by bolts passing through the Z-direction through hole of the outer bracket 15 and then fixed with nuts after the outer sleeve 16 is installed. The front axle 3, the front suspension 5, the steering gear 4, etc. are fixed on the left front longitudinal beam 24 and the right front longitudinal beam 25 of the battery pack frame 6. The rear tube beam 8, the rear suspension 9 and the drive axle 10 equipped with the motor are installed on the left rear longitudinal beam 44 and the right rear longitudinal beam 45. Finally, the wheels and tires are installed on the front axle 3 and the rear drive axle 10 respectively to complete the assembly of the chassis 2.

[0076] The present invention provides an electric commercial vehicle, which includes the aforementioned chassis 2 and cab 1, the cab 1 having a driver's seat and being mounted above the front of the chassis 2.

[0077] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An electric commercial vehicle with a battery pack frame, comprising a cab and a chassis, the cab having a driver's seat and being mounted above the front of the chassis, further comprising at least one motor and at least one battery pack supplying electrical power to the motor, characterized in that, The chassis has a battery pack frame, and the battery pack is fitted into the battery pack frame; The battery pack frame includes a first crossbeam assembly, a second crossbeam assembly, a middle longitudinal beam assembly, a left guardrail assembly, a right guardrail assembly, a front baffle assembly, a rear baffle assembly, and a reinforcing rod assembly. The front and rear ends of the middle longitudinal beam assembly are respectively connected to the first crossbeam assembly and the second crossbeam assembly, and together with the left guardrail assembly, the right guardrail assembly, the front baffle assembly, the rear baffle assembly, and the reinforcing rod assembly, they form two square spaces, creating two battery pack installation chambers separated by the middle longitudinal beam assembly. Each battery pack installation chamber contains at least one battery pack. The first crossbeam assembly consists of a tubular first left wing side beam, a first tubular beam, a first right wing side beam, a left front longitudinal beam, and a right front longitudinal beam; A first mounting plate is provided on the upper part of the middle section of the first pipe beam, and a second mounting plate is provided on the lower part of the middle section of the first pipe beam. The first left wing side beam is fixedly connected to the left front longitudinal beam, and the first pipe beam is fixedly connected to the left front longitudinal beam. The first right wing side beam is fixedly connected to the right front longitudinal beam, and the first pipe beam is fixedly connected to the right front longitudinal beam. The second crossbeam assembly consists of a tubular second left wing side beam, a second tubular beam, a second right wing side beam, a left rear longitudinal beam, and a right rear longitudinal beam; A third mounting plate is provided on the upper part of the middle section of the second pipe beam, and a fourth mounting plate is provided on the lower part of the middle section of the second pipe beam. The second left wing side beam is fixedly connected to the left rear longitudinal beam, and the second pipe beam is fixedly connected to the left rear longitudinal beam; the second right wing side beam is fixedly connected to the right rear longitudinal beam, and the second pipe beam is fixedly connected to the right rear longitudinal beam. The longitudinal beam assembly consists of a first main longitudinal beam, a second main longitudinal beam, a hanging plate assembly, a first secondary longitudinal beam, a second secondary longitudinal beam, a first inclined reinforcing plate, a second inclined reinforcing plate, a hanging plate assembly, a third inclined reinforcing plate, and a fourth inclined reinforcing plate. The first main longitudinal beam is fixedly connected to the first mounting plate and the third mounting plate, respectively. The second main longitudinal beam is fixedly connected to the first mounting plate and the third mounting plate respectively, and the first pipe beam, the first main longitudinal beam, the second main longitudinal beam, and the second pipe beam are fixedly connected. The lower end of the first inclined reinforcing plate is connected to the front end of the first secondary longitudinal beam, and the lower end of the third inclined reinforcing plate is connected to the rear end of the first secondary longitudinal beam. The first inclined reinforcing plate, the first secondary longitudinal beam, and the third inclined reinforcing plate are fixedly connected. The lower end of the second inclined reinforcing plate is connected to the front end of the second secondary longitudinal beam, and the lower end of the fourth inclined reinforcing plate is connected to the rear end of the second secondary longitudinal beam. The second inclined reinforcing plate, the second secondary longitudinal beam, and the fourth inclined reinforcing plate are fixedly connected. The upper ends of the first and second inclined reinforcing plates are both connected to the second mounting plate, and the first and second inclined reinforcing plates are fastened to the first pipe beam. The upper ends of the third and fourth inclined reinforcing plates are both connected to the fourth mounting plate, and the third and fourth inclined reinforcing plates are fastened to the second pipe beam. The upper two sides of the mounting plate assembly are respectively connected to the first main longitudinal beam and the second main longitudinal beam; the lower two sides of the mounting plate assembly are respectively connected to the first secondary longitudinal beam and the second secondary longitudinal beam; the mounting plate assembly is equipped with inner brackets on both sides, and the inner brackets are used to install the battery pack.

2. The electric commercial vehicle with a battery pack frame according to claim 1, characterized in that, The left guardrail assembly consists of an upper left side beam, a lower left side beam, a first left hanging plate, several first universal hanging plates, a second left hanging plate, and a left connecting plate. The upper ends of the first left hanging plate, the second left hanging plate, the first universal hanging plate, and the left connecting plate are all fixed to the upper left side beam, and the lower ends of the first left hanging plate, the second left hanging plate, the first universal hanging plate, and the left connecting plate are all fixed to the lower left side beam. The front end of the upper left side beam is connected to the first left wing side beam, and the rear end of the upper left side beam is connected to the second left wing side beam. An external bracket is installed on the first left hanging plate, the universal hanging plate, and the second left hanging plate, and the external bracket is used to install the battery pack.

3. The electric commercial vehicle with a battery pack frame according to claim 2, characterized in that, The right guardrail assembly consists of an upper right side beam, a lower right side beam, a first right hanging plate, several second universal hanging plates, a second right hanging plate, a third right hanging plate, and a right connecting plate. The upper ends of the first right hanging plate, the second universal hanging plate, the second right hanging plate, the third right hanging plate, and the right connecting plate are all fixed to the upper right side beam. The lower ends of the first right hanging plate, the second universal hanging plate, the second right hanging plate, the third right hanging plate, and the right connecting plate are all fixed to the lower right side beam. The front end of the upper right side beam is connected to the first right wing side beam, and the rear end of the upper right side beam is connected to the second right wing side beam. The first right hanging plate, the second universal hanging plate, the second right hanging plate, and the third right hanging plate are all equipped with external brackets, which are used to install battery packs.

4. The electric commercial vehicle with a battery pack frame according to claim 3, characterized in that, The front baffle assembly includes a front left corner support, a left front baffle, a front center support, a right front baffle, and a right front corner support that are fixedly connected in sequence. The front left corner support is connected to the lower left side beam, the left front baffle is connected to the first lower mounting plate under the first left wing side beam, the right front corner support is connected to the right lower side beam, and the right front baffle is connected to the second lower mounting plate under the first right wing side beam. The front center support is connected to the first secondary middle longitudinal beam and the second secondary middle longitudinal beam, respectively.

5. The electric commercial vehicle with a battery pack frame according to claim 1, characterized in that, The rear baffle assembly includes a rear baffle, a left connecting plate, a right connecting plate, a rear center connecting support, a rear left corner connecting support, and a rear right corner connecting support. The lower ends of the left and right connecting plates are connected to the rear baffle. The upper end of the left connecting plate is connected to the third lower mounting plate of the second left wing side beam, and the upper end of the right connecting plate is connected to the fourth lower mounting plate of the second right wing side beam. The rear left corner connecting support is connected to the lower left side beam of the rear baffle and the left guardrail assembly, respectively. The rear right corner connecting support is connected to the lower right side beam of the rear baffle and the right guardrail assembly, respectively. The rear center connecting support is connected to the first and second secondary center longitudinal beams, respectively.

6. The electric commercial vehicle with a battery pack frame according to claim 1, characterized in that, The reinforcing bar assembly consists of several anti-collision reinforcing bars, which connect the middle positions of the left guardrail assembly and the right guardrail assembly to the central longitudinal beam assembly.

7. The electric commercial vehicle with a battery pack frame according to claim 1, characterized in that, The battery pack includes battery cells and a housing. Flanges with close proximity are provided on both sides of the housing along its length. Mounting holes are provided on the flanges. Each inner mounting hole is provided with a threaded blind hole bushing, and each outer mounting hole is provided with an outer bushing with a through hole.

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