Electric commercial vehicle with battery pack frame

Abstract

The invention relates to the technical field of electric vehicles, in particular to an electric commercial vehicle with a battery pack framework, which comprises a cab and a chassis, the chassis is provided with the battery pack framework, and a battery pack is assembled in the battery pack framework; the battery pack frame is defined 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 battery pack frame is divided into two square battery pack mounting chambers by the middle longitudinal beam assembly, and each battery pack mounting chamber is internally provided with at least one battery pack; the middle longitudinal beam assembly is provided with a plurality of inner supports, the left guardrail assembly and the right guardrail assembly are respectively provided with a plurality of outer supports, and the battery pack is jointly fixed by the inner supports and the outer supports. The battery pack frame is not only a battery pack mounting structure, but also a vehicle body and chassis part mounting and fixing structure, the chassis structure is optimized, the chassis weight is greatly reduced, and light weight is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric vehicles, and in particular relates to an electric commercial vehicle with a battery pack frame. Background Art

[0002] Electric commercial vehicles use one or more high-capacity battery packs. The more battery packs they carry and the larger their size, the more power available and the longer the vehicle's range. In order to improve transportation efficiency, users need more power to increase benefits.

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

[0004] The battery pack installation structure of the prior art is basically an external type, and is divided into an upper battery pack and a lower battery pack according to the relative position of the battery pack and the chassis of the vehicle. The upper battery pack is installed above the chassis and behind the cab, also known as a back-mounted battery pack. Because of its simple installation, it is the main installation method for battery packs of large electric commercial vehicles such as modern tractors, such as CN220963592U. Due to its high center of mass, it is not conducive to the handling stability of the vehicle. The lower battery pack is installed below the chassis, which is a common installation method for battery packs of electric commercial vehicles, especially small and medium-sized commercial vehicles, such as CN113302075A, CN109109642B, CN117601965A, etc. The quick-change battery pack is mostly placed under the trapezoidal frame, which is a form of the lower battery pack, such as CN118544787A, CN118306189A, etc.

[0005] Both the top-mounted battery pack and the bottom-mounted battery pack have two obvious disadvantages. One is that the battery pack has a small capacity and cannot last for long distances. The other is that the frame of the external battery pack is relatively heavy, which is not conducive to lightweighting.

[0006] In order to increase the capacity of the battery pack and reduce the weight, the battery pack frame is formed by using plates, such as CN115503826A, CN217994115U, etc. These structures formed by flat plates have large local stress at the connection between the longitudinal beam and the cross beam, and cannot guarantee the reliability of the frame and the safety of the battery pack.

[0007] Therefore, there is an urgent need for electric commercial vehicles with battery pack frames that can accommodate installation space for multiple large-capacity battery packs, achieve lightweighting, ensure the safety of the battery packs, the reliability of the vehicle's load-bearing operation, and provide appropriate protection for the battery packs in the event of a collision. Summary of the invention

[0008] The object of the present invention is to provide an electric commercial vehicle with a battery pack frame, the commercial vehicle comprising a cab and a chassis, the cab having a driver's seat and being installed above the front of the chassis, the commercial vehicle having at least one motor and at least one battery pack for supplying electrical energy to the motor, so as to solve the problems existing in the above-mentioned background technology.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] An electric commercial vehicle with a battery pack frame comprises a cab and a chassis, wherein the cab has a driving position for a driver and is mounted above the front of the chassis, and further comprises at least one motor and at least one battery pack for supplying electric energy to the motor, wherein the chassis has a battery pack frame, and the battery pack is assembled in the battery pack frame;

[0011] 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 fender assembly, a rear fender 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 fender assembly, the rear fender assembly and the reinforcing rod assembly, form two square spaces, forming two battery pack installation rooms separated by the middle longitudinal beam assembly, and each battery pack installation room has at least one battery pack.

[0012] Further, the first crossbeam assembly is composed 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;

[0013] A first mounting plate is arranged on the middle part of the first tubular beam, and a second mounting plate is arranged on the lower part of the middle part of the first tubular beam. The first left wing side beam is fixedly connected to the left front longitudinal beam, and the first tubular 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 tubular 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 tubular beam, a second right wing side beam, a left rear longitudinal beam and a right rear longitudinal beam;

[0015] A third mounting plate is arranged on the middle part of the second tubular beam, a fourth mounting plate is arranged on the lower part of the middle part of the second tubular beam, the second left wing side beam is fixedly connected to the left rear longitudinal beam, and the second tubular 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 tubular beam is fixedly connected to the right 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 secondary middle longitudinal beam, a second secondary middle longitudinal beam, a first oblique reinforcement plate, a second oblique reinforcement plate, a hanging plate assembly, a third oblique reinforcement plate and a fourth oblique reinforcement plate, and the first main middle longitudinal beam is fixedly connected to the first mounting plate and the third mounting plate respectively;

[0017] The second main middle longitudinal beam is fixedly connected to 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 oblique reinforcing plate is connected to the front end of the first secondary middle longitudinal beam, the lower end of the third oblique reinforcing plate is connected to the rear end of the first secondary middle longitudinal beam, and the first oblique reinforcing plate, the first secondary middle longitudinal beam and the third oblique reinforcing plate are fixedly connected;

[0019] The lower end of the second oblique reinforcing plate is connected to the front end of the second secondary middle longitudinal beam, the lower end of the fourth oblique reinforcing plate is connected to the rear end of the second secondary middle longitudinal beam, and the second oblique reinforcing plate, the second secondary middle longitudinal beam and the fourth oblique reinforcing plate are fixedly connected; the upper ends of the first oblique reinforcing plate and the second oblique reinforcing plate are both connected to the second mounting plate, and the first oblique reinforcing plate and the second oblique reinforcing plate are fastened to the first tube beam; the upper ends of the third oblique reinforcing plate and the fourth oblique reinforcing plate are both connected to the fourth mounting plate, and the third oblique reinforcing plate and the fourth oblique reinforcing plate are fastened to the second tube beam;

[0020] The two upper surfaces of the hanging plate assembly are respectively connected to the first main center longitudinal beam and the second main center longitudinal beam; the two lower surfaces of the hanging plate assembly are respectively connected to the first secondary center longitudinal beam and the second secondary center longitudinal beam; inner brackets are installed on both sides of the hanging plate assembly, and the inner brackets are used to install the battery pack.

[0021] Furthermore, the left guardrail assembly is composed of an upper left beam, a lower left beam, a first left hanging plate, a plurality of 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 on the upper left 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 on the lower left beam; the front end of the upper left beam is connected to the first left wing side beam, and the rear end of the upper left beam is connected to the second left wing side beam; the first left hanging plate, the universal hanging plate and the second left hanging plate are all equipped with an external bracket, and the external bracket is used to install a battery pack.

[0022] Furthermore, the right guardrail assembly is composed of a right upper side beam, a right lower 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 on the right upper 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 on the right lower side beam; the front end of the right upper side beam is connected to the first right wing side beam, and the rear end of the right upper 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 an external bracket, and the external bracket is used to install the battery pack.

[0023] Furthermore, the front fender assembly includes a front left corner connecting support, a left front fender, a front middle connecting support, a right front fender and a right front corner connecting support which are fixedly connected in sequence, the front left corner connecting support is connected to the lower left beam, the left front fender is connected to the first lower mounting plate under the first left wing side beam, the right front corner connecting support is connected to the right lower side beam, and the right front fender is connected to the second lower mounting plate under the first right wing side beam; the front middle connecting support is respectively connected to the first sub-center longitudinal beam and the second sub-center longitudinal beam.

[0024] Furthermore, the rear fender assembly includes a rear fender, 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 connecting plate and the right connecting plate are connected to the rear fender, 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 respectively connected to the rear fender and the lower left beam of the left guardrail assembly, and the rear right corner connecting support is respectively connected to the rear fender and the right lower side beam of the right guardrail assembly; the rear center connecting support is respectively connected to the first sub-center longitudinal beam and the second sub-center longitudinal beam.

[0025] Furthermore, the reinforcement rod assembly is composed of a plurality of anti-collision reinforcement rods, and the anti-collision reinforcement rods connect the middle positions of the left guardrail assembly and the right guardrail assembly with the middle longitudinal beam assembly.

[0026] Furthermore, the battery pack includes a battery cell and a shell, and flanges with similar distances are arranged on both sides of the shell in the length direction. The flanges are provided with mounting holes, 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.

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

[0028] 1. The present invention provides two square battery pack installation chambers, which can accommodate multiple layers of battery packs, making full use of the space in the Z-axis direction, expanding the storage space, facilitating the arrangement of more battery packs, increasing the battery capacity, and improving the endurance of electric commercial vehicles.

[0029] 2. The first crossbeam assembly and the second crossbeam assembly adopt a round tube structure, which can fully reduce the stress caused by bending and torsion of the vehicle, and ensure the reliability and load-bearing capacity of the vehicle.

[0030] 3. The battery pack frame is both a battery pack mounting structure and a vehicle body and chassis component mounting and fixing structure, which optimizes the chassis structure, significantly reduces chassis weight, and achieves lightweight.

[0031] 4. The front longitudinal beam of the first cross beam assembly extends forward along X and can be installed with the front axle, steering gear and wheels, etc.; the rear longitudinal beam of the second cross beam assembly extends rearward and frontward along X and can be installed with the rear pipe beam, rear suspension and drive axle, etc.

[0032] 5. An anti-collision reinforcement rod assembly is arranged under the frame of the present invention to ensure the collision safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A side view of a commercial vehicle according to an embodiment of the present invention.

[0034] Figure 2 for Figure 1 A top view of the mid-chassis with battery mounting structures.

[0035] Figure 3 for Figure 2 MM cross-sectional view.

[0036] Figure 4 for Figure 3 Enlarged view of point I.

[0037] Figure 5 for Figure 3 Enlarged view of II.

[0038] Figure 6 for Figure 2 Schematic diagram of the battery pack frame.

[0039] Figure 7 for Figure 6 Front view of.

[0040] Figure 8 for Figure 6 Rear view of.

[0041] Fig. 9 Schematic diagram of the first crossbeam assembly.

[0042] Fig.10 Schematic diagram of the middle longitudinal beam assembly.

[0043] Fig.11 Schematic diagram of the second crossbeam assembly.

[0044] Fig.12 Schematic diagram of the first tube beam and the second tube beam.

[0045] Fig.13 This is a schematic diagram of the right guardrail assembly.

[0046] Fig.14 This is a schematic diagram of the left guardrail assembly.

[0047] Fig.15 A schematic diagram of the front baffle assembly.

[0048] Fig.16 Schematic diagram of the tailgate assembly.

[0049] Fig.17 Schematic diagram of the anti-collision reinforcement bar assembly.

[0050] Description of reference numerals:

[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 bracket; 12. Inner flange; 13. Blind hole sleeve; 14. Outer flange; 15. Outer bracket; 16. Outer sleeve; 20. First crossbeam 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 secondary middle longitudinal beam; 34. Second secondary middle longitudinal beam; 35. Front oblique reinforcement plate; 36. Hanging plate assembly; 37. Rear oblique reinforcement plate; 40. Second cross beam assembly; 41. Second pipe 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 beam; 62, lower left beam; 63, first left hanging plate; 64, left connecting plate; 65, second left hanging plate; 70, front baffle assembly; 71, left front baffle; 72, Right front fender; 73, front center connecting support; 74, front left corner connecting support; 75, right front corner connecting support; 80, rear fender assembly; 81, rear fender; 82, left connecting plate; 83, right connecting plate; 84, rear center 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 solution of the present invention is described in detail below in conjunction with the accompanying drawings. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, but cannot be construed as limiting the technical solution of the present invention.

[0053] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0054] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0056] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", etc., and the like, are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0057] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. 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 invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0058] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0059] The present embodiment provides an electric commercial vehicle with a battery pack frame, which includes a cab 1, a chassis 2, a front axle 3, a steering gear 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 aimed at improving the battery pack frame structure of a commercial vehicle, other parts of the commercial vehicle are not described in detail. A cab is installed above the front of the chassis, and the chassis has a battery pack frame. Figure 1is a side view of an electric commercial vehicle according to an embodiment of the present invention, Figure 2 for Figure 1 A top view of the mid-chassis having a battery pack and a battery pack frame structure; Figure 3 This is an embodiment of connecting a battery pack to a battery pack frame. Figure 4 , 5 Detailed schematic diagram of the installation embodiment.

[0060] like Figures 6 to 8 The present embodiment provides a battery pack frame, which includes: a first crossbeam assembly 20, a middle longitudinal beam assembly 30, a second crossbeam assembly 40, a right guardrail assembly 50, a left guardrail assembly 60, a front fender assembly 70, a rear fender assembly 80, and an anti-collision reinforcement rod assembly 90; the first crossbeam assembly 20 and the second crossbeam assembly 40 extend in a 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 form a square space with the left guardrail assembly 60, the right guardrail assembly 50, the front fender assembly 70, the rear fender assembly 80 and the reinforcement rod assembly 90, forming two battery pack installation chambers symmetrical in the XZ plane, each battery pack installation chamber having at least one battery pack 7. A plurality of inner brackets 11 are mounted on the middle longitudinal beam assembly 30 of the battery pack frame 6, and a plurality of outer brackets 15 are mounted on the right guardrail assembly 50 and the left guardrail assembly 60 respectively; the battery pack 7 is fixed on the inner brackets 11 and the outer brackets 15; the number of layers of the inner brackets 11 and the outer brackets 15 corresponds to the number of battery packs, and the number of the inner brackets 11 and the outer brackets 15 is related to the weight and volume of the battery pack, and is specifically determined to meet the strength bearing capacity; the present embodiment is a three-layer battery pack, the inner brackets 11 and the outer brackets 15 each have three layers, and each battery pack 7 is provided with 5 mounting holes on both sides.

[0061] like Figures 9 to 17 It is a detailed schematic diagram of the components of the battery pack frame of this application.

[0062] The first crossbeam 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 first left wing side beam 22 and the first right wing side beam 23 are provided with a large mounting surface on the inner side and a small mounting surface on the outer side, and a plurality of bolt holes are provided on the mounting surface; a first lower mounting plate 221 is provided under the first left wing side beam 22, and a second lower mounting plate 231 is provided under the first right wing side beam 23; the first tube beam 21 is a symmetrical hollow structure, with mounting surfaces provided at both ends, and a plurality of bolt holes are provided on the mounting surface, A first mounting plate 211 and a second mounting plate 212 are provided in the middle of the tubular beam 21. 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 fitted with the outer ventral surface of the left front longitudinal beam 24, the left end surface of the first tubular beam 21 is fitted with the inner ventral surface of the left front longitudinal beam 24, and a plurality of bolts and nuts are tightened. Similarly, the mounting surface of the first right wing side beam 23 is fitted with the outer ventral surface of the right front longitudinal beam 25, the right end surface of the first tubular beam 21 is fitted with the inner ventral surface of the right front longitudinal beam 25, and a plurality of bolts and nuts are tightened.

[0063] The second crossbeam 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 second left wing side beam 42 and the second right wing side beam 43 are provided with mounting surfaces on their inner sides, and a plurality of bolt holes are provided on the mounting surfaces; a third lower mounting plate 421 is provided under the second left wing side beam 42, and a fourth lower mounting plate 431 is provided under the second right wing side beam 43; mounting surfaces are provided at both ends 41 of the second tube beam, and a plurality of bolt holes are provided on the mounting surfaces; a third lower mounting plate 421 is provided at the middle of the second tube beam 41; The mounting plate 411 and the fourth mounting plate 412, and 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 fits with the outer belly surface of the left rear longitudinal beam 44, the left end surface of the second tube beam 41 fits with the inner belly surface of the left rear longitudinal beam 44, and a plurality of bolts and nuts are tightened; similarly, the mounting surface of the second right wing side beam 43 fits with the outer belly surface of the right rear longitudinal beam 45, the right end surface of the second tube beam 41 fits with the inner belly surface of the right rear longitudinal beam 45, and a plurality of bolts and nuts are tightened.

[0064] The center longitudinal beam assembly 30 is composed of a first main center longitudinal beam 31, a second main center longitudinal beam 32, a first secondary center longitudinal beam 33, a second secondary center longitudinal beam 34, an oblique reinforcement plate 35, and a hanging plate assembly 36; the first main center longitudinal beam 31 and the second main center longitudinal beam 32 are back to back, with the hanging plate assembly 36 sandwiched in between, the front end is in contact with the first mounting plate 211 of the first tube beam 21, and the rear end is in contact with the third mounting plate 411 of the second tube beam 41, and is fastened with a number of bolts and nuts.

[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 and fastened to the second mounting plate 212 of the first tube beam 21 through the front oblique reinforcing plate 35, and the rear end is attached and fastened to the fourth mounting plate 412 on the second tube beam 41 through the rear oblique reinforcing plate 35. In this way, the entire middle part forms a high-rigidity 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 larger cross-sections than the first secondary middle longitudinal beam 33 and the second secondary middle longitudinal beam 34, forming a strong upper part and a weak lower part, which ensures the load-bearing while reducing the overall weight.

[0066] The two upper surfaces of the hanging plate assembly 36 are respectively in contact with the ventral surfaces of the first main center longitudinal beam 31 and the second main center longitudinal beam 32 and are fastened with a number of bolts and nuts; the two lower end surfaces of the hanging plate assembly 36 are respectively in contact with the ventral surfaces of the first secondary center longitudinal beam 33 and the second secondary center longitudinal beam 34 and are fastened with a number of bolts and nuts; a number of hanging plate assemblies 36 are spaced at a similar distance from each other; inner brackets 11 are installed on both sides of the hanging plate assembly 36, each inner bracket 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 number of Y-direction through holes, and the vertical Z-direction mounting surface is provided with a Z-direction through hole, the Y-direction through hole is used to fix the inner bracket 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 side beam 51, a right lower side 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. The total number of hanging plates corresponds to the number of hanging plates of the middle longitudinal beam hanging plate assembly; the right upper side beam 51 and the right lower side beam 52 are connected by a number of hanging plates to form a whole, wherein the cross-section and thickness of the right upper side beam 51 are slightly larger than those of the right lower side beam 52, so that the upper part is strong and the lower part is weak, which ensures the load-bearing while reducing the overall weight; the front end of the right upper side beam 51 is connected to the outer small mounting surface of the first right wing side beam 23, and the rear end of the right upper side beam 51 is connected to the outer small mounting surface of the second right wing side 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 beam 61, a lower left beam 62, a first left hanging plate 63, a universal hanging plate 54, and a second left hanging plate 65. 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 with the right guardrail assembly 50; the front end of the upper left beam 61 is connected to the small outer mounting surface of the first left wing side beam 22, and the rear end of the upper left beam 61 is connected to the small outer mounting surface of the second left wing side 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] External brackets 15 are respectively installed 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. The number of external brackets 15 on each piece is the same as the number of layers of the battery pack 7; each external bracket 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 hole is used to fix the external bracket 15, and the Z-direction through hole is used to install the battery pack 7.

[0070] The front fender assembly 70 is composed of a left front fender 71, a right front fender 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 fender 71 is connected to the lower left side beam 62 of the left guardrail assembly 60 through the front left corner connecting support 74, and the right front fender 72 is connected to 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 fender 71 and the right front fender 72 are fastened to the front middle connecting support 73, and the front middle connecting support 74 is connected to the right lower side beam 52 of the right guardrail assembly 50. 3 is fitted with the ventral surfaces of the first secondary middle longitudinal beam 33 and the second secondary middle longitudinal beam 34, and the front middle connecting support 73 is fastened together with the front ends of the first secondary middle longitudinal beam 33 and the second secondary middle longitudinal beam 34 and the two oblique reinforcing plates 35, so as to realize the connection between the front baffle assembly 70 and 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 fender assembly 80 is composed of a rear fender 81, a left connecting plate 82, a right connecting plate 83, a center connecting support 84, a rear left corner connecting support 85, and a rear right corner connecting support 86; the rear fender 81 is connected to the lower left beam 62 of the left guardrail assembly 60 through the rear left corner connecting support 85, and is connected to the right lower side beam 52 of the right guardrail assembly 50 through the rear right corner connecting support 86; the rear center connecting support 84 is fitted with the ventral surfaces of the first sub-center longitudinal beam 33 and the second sub-center longitudinal beam 34, and the rear center connecting support 84 is fastened together with the rear ends of the first sub-center longitudinal beam 33 and the second sub-center longitudinal beam 34 and the two oblique reinforcement plates 35, so as to realize the connection between the rear fender assembly 80 and the center longitudinal beam assembly 30; at the same time, the rear fender 81 is fastened to 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 to the fourth lower mounting plate 431 of the second right wing side beam 43.

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

[0073] Through the above connections, 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 fender assembly 70, the rear fender assembly 80, and the anti-collision reinforcement rod assembly 90 form a battery pack frame 6 for installing the battery pack 7. The battery pack frame 6 has two left-right symmetrical square battery pack installation chambers, and each battery pack installation chamber can accommodate at least one battery pack 7.

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

[0075] like Figure 3 As shown, the inner and outer sides of the battery pack 7 are respectively placed on the inner bracket 11 and the outer bracket 15. The inner side is fixed with bolts passing through the Z-direction through holes of the inner bracket 11 and screwed into the blind hole bushing 13, and the outer side is fixed with bolts passing through the Z-direction through holes of the outer bracket 15 and then fixed with nuts on the outer sleeve 16; 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 respectively installed on the front axle 3 and the rear drive axle 10 to complete the assembly of the chassis 2.

[0076] The present invention provides an electric commercial vehicle, which includes the above-mentioned chassis 2 and a cab 1. The cab 1 has a driving seat for a driver and is installed above the front part of the chassis 2.

[0077] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments 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, wherein the cab has a driver's seat and is mounted above the front of the chassis, and further comprising at least one motor and at least one battery pack for supplying electric energy to the motor, characterized in that: The chassis has a battery pack frame, and the battery pack is assembled in 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 fender assembly, a rear fender 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 fender assembly, the rear fender assembly and the reinforcing rod assembly, form two square spaces, forming two battery pack installation rooms separated by the middle longitudinal beam assembly, and each battery pack installation room has at least one battery pack.

2. The electric commercial vehicle with a battery pack frame according to claim 1, characterized in that: The first cross beam assembly is composed 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 arranged on the middle part of the first tubular beam, and a second mounting plate is arranged on the lower part of the middle part of the first tubular beam. The first left wing side beam is fixedly connected to the left front longitudinal beam, and the first tubular 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 tubular beam is fixedly connected to the right front longitudinal beam.

3. The electric commercial vehicle with a battery pack frame according to claim 2, characterized in that: The second cross beam assembly is composed 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 arranged on the middle part of the second tubular beam, a fourth mounting plate is arranged on the lower part of the middle part of the second tubular beam, the second left wing side beam is fixedly connected to the left rear longitudinal beam, and the second tubular 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 tubular beam is fixedly connected to the right rear longitudinal beam.

4. The electric commercial vehicle with a battery pack frame according to claim 3, characterized in that: 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 secondary middle longitudinal beam, a second secondary middle longitudinal beam, a first oblique reinforcement plate, a second oblique reinforcement plate, a hanging plate assembly, a third oblique reinforcement plate and a fourth oblique reinforcement plate, and the first main middle longitudinal beam is fixedly connected to the first mounting plate and the third mounting plate respectively; The second main middle longitudinal beam is fixedly connected to 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; The lower end of the first oblique reinforcing plate is connected to the front end of the first secondary middle longitudinal beam, the lower end of the third oblique reinforcing plate is connected to the rear end of the first secondary middle longitudinal beam, and the first oblique reinforcing plate, the first secondary middle longitudinal beam and the third oblique reinforcing plate are fixedly connected; The lower end of the second oblique reinforcing plate is connected to the front end of the second secondary middle longitudinal beam, the lower end of the fourth oblique reinforcing plate is connected to the rear end of the second secondary middle longitudinal beam, and the second oblique reinforcing plate, the second secondary middle longitudinal beam and the fourth oblique reinforcing plate are fixedly connected; the upper ends of the first oblique reinforcing plate and the second oblique reinforcing plate are both connected to the second mounting plate, and the first oblique reinforcing plate and the second oblique reinforcing plate are fastened to the first tube beam; the upper ends of the third oblique reinforcing plate and the fourth oblique reinforcing plate are both connected to the fourth mounting plate, and the third oblique reinforcing plate and the fourth oblique reinforcing plate are fastened to the second tube beam; The two upper surfaces of the hanging plate assembly are respectively connected to the first main center longitudinal beam and the second main center longitudinal beam; the two lower surfaces of the hanging plate assembly are respectively connected to the first secondary center longitudinal beam and the second secondary center longitudinal beam; inner brackets are installed on both sides of the hanging plate assembly, and the inner brackets are used to install the battery pack.

5. The electric commercial vehicle with a battery pack frame according to claim 3, characterized in that: The left guardrail assembly consists of an upper left beam, a lower left beam, a first left hanging plate, a plurality of 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 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 beam; the front end of the upper left beam is connected to the first left wing side beam, and the rear end of the upper left beam is connected to the second left wing side beam; the first left hanging plate, the universal hanging plate and the second left hanging plate are all equipped with an external bracket, and the external bracket is used to install a battery pack.

6. The electric commercial vehicle with a battery pack frame according to claim 5, characterized in that: The right guardrail assembly consists of a right upper side beam, a right lower 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 on the right upper 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 on the right lower side beam; the front end of the right upper side beam is connected to the first right wing side beam, and the rear end of the right upper 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 an external bracket, and the external bracket is used to install a battery pack.

7. The electric commercial vehicle with a battery pack frame according to claim 6, characterized in that: The front fender assembly includes a front left corner connecting support, a left front fender, a front middle connecting support, a right front fender and a right front corner connecting support which are fixedly connected in sequence, the front left corner connecting support is connected to the lower left beam, the left front fender is connected to the first lower mounting plate under the first left wing side beam, the right front corner connecting support is connected to the right lower side beam, and the right front fender is connected to the second lower mounting plate under the first right wing side beam; the front middle connecting support is respectively connected to the first secondary middle longitudinal beam and the second secondary middle longitudinal beam.

8. The electric commercial vehicle with a battery pack frame according to claim 4, characterized in that: The rear fender assembly includes a rear fender, 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 connecting plate and the right connecting plate are connected to the rear fender, 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 respectively connected to the rear fender and the lower left beam of the left guardrail assembly, and the rear right corner connecting support is respectively connected to the rear fender and the right lower side beam of the right guardrail assembly; the rear center connecting support is respectively connected to the first secondary center longitudinal beam and the second secondary center longitudinal beam.

9. The electric commercial vehicle with a battery pack frame according to claim 1, characterized in that: The reinforcement rod assembly is composed of a plurality of anti-collision reinforcement rods, and the anti-collision reinforcement rods connect the middle positions of the left guardrail assembly and the right guardrail assembly with the middle longitudinal beam assembly.

10. The electric commercial vehicle with a battery pack frame according to claim 1, characterized in that: The battery pack includes a battery cell and a shell. Flanges with similar distances are arranged on both sides of the shell in the length direction. The flanges are provided with mounting holes. Each inner mounting hole is provided with a blind hole bushing with a thread, and each outer mounting hole is provided with an outer bushing with a through hole.

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