Electric commercial vehicle having battery pack frame

Abstract

An electric commercial vehicle having a battery pack frame, the electric commercial vehicle comprising a cab (1) and a chassis (2), wherein the chassis (2) is provided with the battery pack frame; the battery pack frame is defined by a first cross beam assembly (20), a second cross beam assembly (40), a middle longitudinal beam assembly (30), a left guardrail assembly (60), a right guardrail assembly (50), a front baffle plate assembly (70), a rear baffle plate assembly (80), and a reinforcing rod assembly (90); the middle longitudinal beam assembly (30) divides the battery pack frame into two square battery pack mounting chambers; each battery pack mounting chamber is internally provided with at least a battery pack (7); a plurality of inner supports (11) are provided in the middle longitudinal beam assembly (30); a plurality of outer supports (15) are provided in each of the left guardrail assembly (60) and the right guardrail assembly (50); and each battery pack (7) is jointly fixed by the inner supports (11) and the outer supports (15).

Description

An electric commercial vehicle with a battery pack frame Technical Field

[0001] This invention belongs to the field of electric vehicle technology, and specifically relates to an electric commercial vehicle with a battery pack frame. Background Technology

[0002] Electric commercial vehicles use one or more high-capacity battery packs. The more and larger the battery packs, the more electricity is available, and the longer the vehicle's driving range. To improve transportation efficiency, users need more electricity to increase profitability.

[0003] When a vehicle is fully loaded, the most basic requirements for the chassis are durability and reliability. Due to the chassis's flexibility, the frame will undergo bending and torsional deformation during vehicle operation, and these deformations will directly affect the safety of the battery pack. Insufficient bending stiffness, torsional stiffness, and load-bearing capacity will lead to direct or rapid chassis failure. At the same time, the chassis must have a certain degree of collision resistance to protect the battery pack.

[0004] Existing battery pack installation structures are mostly externally mounted. Based on the relative position of the battery pack to the vehicle chassis, they are divided into top-mounted and bottom-mounted battery packs. Top-mounted battery packs refer to battery packs installed above the chassis and behind the cab, also known as rear-mounted battery packs. Due to their simple installation, this is the main installation method for battery packs in modern large electric commercial vehicles such as tractor trucks (e.g., the installation method disclosed in CN220963592U). However, this installation method has a high center of gravity, which adversely affects the vehicle's handling stability. Bottom-mounted battery packs refer to battery packs installed below the chassis. This is a common installation method for electric commercial vehicle battery packs, especially in small and medium-sized commercial vehicles (e.g., CN113302075A, CN109109642B, CN117601965A). Quick-change battery packs are often placed under the trapezoidal frame and are a form of bottom-mounted battery pack (e.g., CN118544787A, CN118306189A).

[0005] Both top-mounted and bottom-mounted battery packs have two obvious drawbacks: first, the battery pack has a small capacity and cannot provide long-distance range; second, the external battery pack frame is relatively heavy, which is not conducive to weight reduction.

[0006] To increase battery pack capacity and reduce weight, sheet metal is used to construct the battery pack frame (such as CN115503826A, CN217994115U, etc.). These structures formed by flat sheet metal have high local stress at the connection between longitudinal and transverse beams, 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 to accommodate multiple high-capacity battery packs, achieve lightweight design, and ensure the safety of the battery packs, the reliability of vehicle operation, and appropriate protection for the battery packs in the event of a collision. Summary of the Invention

[0008] The purpose of this invention is to provide an electric commercial vehicle with a battery pack frame, the electric commercial vehicle including a cab and a chassis, the cab having a driver's seat and being mounted above the front of the chassis, the electric commercial vehicle having at least one motor and at least one battery pack supplying power to the motor.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] An electric commercial vehicle with a battery pack frame includes a cab and a chassis, the cab having a driver's seat and being mounted above the front of the chassis, and further including at least one motor and at least one battery pack supplying power to the motor, the chassis having a battery pack frame, and the battery pack being fitted into 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 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, thereby forming two battery pack installation chambers separated by the middle longitudinal beam assembly. Each battery pack installation chamber contains at least one battery pack.

[0012] Optionally, 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;

[0013] A first mounting plate is provided on the upper surface of the middle part of the first tube beam, and a second mounting plate is provided on the lower surface of the middle part of the first tube beam. 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] Optionally, 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;

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

[0016] Optionally, 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.

[0017] 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.

[0018] 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.

[0019] 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.

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

[0021] Optionally, the left guardrail assembly comprises 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. External brackets for installing battery packs are installed on the first left hanging plate, the first universal hanging plate, and the second left hanging plate.

[0022] Optionally, the right guardrail assembly comprises 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 for installing battery packs.

[0023] Optionally, 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 lower right 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.

[0024] Optionally, 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 connecting plate and the right connecting plate are both 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 rear baffle and the lower left side beam of the left guardrail assembly, respectively, and the rear right corner connecting support is connected to the rear baffle and the lower right side beam of the right guardrail assembly, respectively; the rear center connecting support is connected to the first secondary center longitudinal beam and the second secondary center longitudinal beam, respectively.

[0025] Optionally, 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.

[0026] Optionally, the battery pack includes a battery cell 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.

[0027] The beneficial effects of this invention are:

[0028] 1. This invention provides two square battery pack installation chambers, which can accommodate multiple 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 battery capacity, and improving the range of electric commercial vehicles.

[0029] 2. The first and second crossbeam assemblies adopt a tubular structure, which can significantly reduce the stress caused by bending and torsion of the vehicle, ensuring the reliability and load-bearing capacity of the vehicle.

[0030] 3. The battery pack frame serves as both the battery pack mounting structure and the mounting and fixing structure for body and chassis components, optimizing the chassis structure, significantly reducing chassis weight, and achieving lightweighting.

[0031] 4. The front longitudinal beam of the first crossbeam assembly extends forward along the X direction and can be used to install the front axle, steering gear, and wheels, etc.; the rear longitudinal beam of the second crossbeam assembly extends backward along the X direction and can be used to install the rear tube beam, rear suspension, and drive axle, etc.

[0032] 5. The framework of this invention includes a collision-resistant reinforcement bar assembly, which can ensure vehicle collision safety. Attached Figure Description

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

[0034] Figure 2 is a top view of the chassis in Figure 1, which has a battery mounting structure.

[0035] Figure 3 is a cross-sectional view of the MM section of Figure 2.

[0036] Figure 4 is an enlarged view of point I in Figure 3.

[0037] Figure 5 is an enlarged view of section II in Figure 3.

[0038] Figure 6 is a schematic diagram of the battery pack frame in Figure 2.

[0039] Figure 7 is a front view of Figure 6.

[0040] Figure 8 is a rear view of Figure 6.

[0041] Figure 9 is a schematic diagram of the first crossbeam assembly.

[0042] Figure 10 is a schematic diagram of the middle longitudinal beam assembly.

[0043] Figure 11 is a schematic diagram of the second crossbeam assembly.

[0044] Figure 12 is a schematic diagram of the first and second tube beams.

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

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

[0047] Figure 15 is a schematic diagram of the front baffle assembly.

[0048] Figure 16 is a schematic diagram of the rear bumper assembly.

[0049] Figure 17 is a schematic diagram of the anti-collision reinforcement bar assembly.

[0050] The reference numerals in the attached drawings are explained as follows: 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 diagonal reinforcing plate; 36. Hanging plate assembly; 37. Rear diagonal reinforcing plate; 40. Second crossbeam 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 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 Mounting Plate; 54, Universal Mounting Plate; 55, Second Right Mounting Plate; 56, Third Right Mounting Plate; 57, Right Connecting Plate; 60, Left Guardrail Assembly; 61, Upper Left Side Beam; 62, Lower Left Side Beam; 63, First Left Mounting Plate; 64, Left Connecting Plate; 65, Second Left Mounting Plate; 70, Front Beam Panel assembly; 71. Left front panel; 72. Right front panel; 73. Front center connecting support; 74. Front left corner connecting support; 75. Right front corner connecting support; 80. Rear panel assembly; 81. Rear panel; 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 bar assembly; 91. First anti-collision reinforcement bar; 92. Second anti-collision reinforcement bar; 93. Third anti-collision reinforcement bar. Detailed Implementation

[0051] The technical solution of the present invention will be described in detail below with reference to 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, and should not be construed as limiting the technical solution of the present invention.

[0052] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0053] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0054] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0056] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0057] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0058] This embodiment provides an electric commercial vehicle with a battery pack frame. The electric commercial vehicle includes a cab 1, chassis 2, front axle 3, steering gear 4, front suspension 5, battery pack frame 6, battery pack 7, rear tube beam 8, rear suspension 9, drive axle 10, and other necessary components. Since this application only addresses improvements to the battery pack frame structure of the commercial vehicle, other parts of the commercial vehicle are not described in detail. The cab is mounted on the upper part of the front of the chassis, which has a battery pack frame. Figure 1 is a side view of an electric commercial vehicle according to an embodiment of the present invention, Figure 2 is a top view of the chassis in Figure 1, which has a battery pack and battery pack frame structure. Figure 3 shows an embodiment of the connection between the battery pack and the battery pack frame, and Figures 4 and 5 are detailed schematic diagrams of the installation embodiments.

[0059] Figures 6 to 8 illustrate an embodiment of the provided 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 baffle assembly 70, a rear baffle assembly 80, and a crash barrier reinforcement assembly 90. The first crossbeam assembly 20 and the second crossbeam assembly 40 are spaced a certain distance apart in the longitudinal direction (X-direction) and both extend in the transverse direction (Y-direction), and are fixed together with the middle longitudinal beam assembly 30. They, along with the left guardrail assembly 60, right guardrail assembly 50, front baffle assembly 70, rear baffle assembly 80, and reinforcement assembly 90, form a square space (e.g., a rectangular space), creating two battery pack mounting chambers symmetrical in the XZ plane. Each battery pack mounting chamber contains at least one battery pack 7. A plurality of inner supports 11 are mounted on the middle longitudinal beam assembly 30 of the battery pack frame 6, and a plurality of outer supports 15 are correspondingly mounted on the right guardrail assembly 50 and the left guardrail assembly 60. The battery pack 7 is fixed on the inner bracket 11 and the outer bracket 15. The number of layers of the inner bracket 11 and the outer bracket 15 corresponds to the number of battery packs. The number of inner brackets 11 and outer brackets 15 is related to the weight and volume of the battery pack, and needs to be determined to meet the strength and load-bearing requirements. In a specific embodiment, there is a three-layer battery pack, that is, there are three layers of inner brackets 11 and three layers of outer brackets 15. Each battery pack 7 has five mounting holes on both sides.

[0060] Figures 9 to 17 are detailed schematic diagrams of the components of the battery pack frame of this application.

[0061] The first crossbeam assembly 20 consists of a first tube beam 21, a first left wing beam 22, a first right wing beam 23, a left front longitudinal beam 24, and a right front longitudinal beam 25. The first left wing beam 22 and the first right wing beam 23 have large mounting surfaces on their inner sides and small mounting surfaces on their outer sides, with several bolt through holes on the mounting surfaces. The first left wing beam 22 has a first lower mounting plate 221, and the first right wing beam 23 has a second lower mounting plate 231. The first tube beam 21 has a symmetrical hollow structure with mounting surfaces at both ends, and several bolt through holes on the mounting surfaces. The middle part of the first tube beam 21 has a first mounting plate 211 and a second mounting plate 212, with parallel mounting surfaces on both sides and several bolt through holes. The mounting surface of the first left wing beam 22 is in contact with the outer surface of the left front longitudinal beam 24, and the left end face of the first tube beam 21 is in contact with the inner surface of the left front longitudinal beam 24, and they are fastened with several bolts and nuts. Similarly, the mounting surface of the first right wing side beam 23 is in contact with the outer surface of the right front longitudinal beam 25, and the right end face of the first tube beam 21 is in contact with the inner surface of the right front longitudinal beam 25, and is fastened by several bolts and nuts.

[0062] The second crossbeam assembly 40 consists of a second tube beam 41, a second left wing beam 42, a second right wing beam 43, a left rear longitudinal beam 44, and a right rear longitudinal beam 45. The inner sides of the second left wing beam 42 and the second right wing beam 43 have mounting surfaces with several bolt through holes. The second left wing beam 42 has a third lower mounting plate 421, and the second right wing beam 43 has a fourth lower mounting plate 431. The two ends of the second tube beam 41 have mounting surfaces with several bolt through holes. The middle of the second tube beam 41 has a third mounting plate 411 and a fourth mounting plate 412, both of which have parallel mounting surfaces and several bolt through holes. The mounting surface of the second left wing beam 42 is in contact with the outer surface of the left rear longitudinal beam 44, and the left end face of the second tube beam 41 is in contact with the inner surface of the left rear longitudinal beam 44, and they are fastened with several bolts and nuts. Similarly, the mounting surface of the second right wing beam 43 is in contact with the outer surface of the right rear longitudinal beam 45, and the right end face of the second tube beam 41 is in contact with the inner surface of the right rear longitudinal beam 45, and is fastened by several bolts and nuts.

[0063] The longitudinal beam assembly 30 consists of a first main longitudinal beam 31, a second main longitudinal beam 32, a first secondary longitudinal beam 33, a second secondary longitudinal beam 34, a diagonal reinforcing plate 35, and a hanging plate assembly 36. The first main longitudinal beam 31 and the second main longitudinal beam 32 are back-to-back, with the hanging plate assembly 36 sandwiched in the middle. The front end of the hanging plate assembly 31 is attached to the first mounting plate 211 of the first pipe beam 21, and the rear end is attached to the third mounting plate 411 of the second pipe beam 41. The two assemblies are fastened together with several bolts and nuts.

[0064] Similarly, the first secondary longitudinal beam 33 and the second secondary longitudinal beam 34 are sandwiched by a hanging plate assembly 36. The front end is attached and fastened to the second mounting plate 212 on the first pipe beam 21 via a front diagonal reinforcing plate 35, and the rear end is attached and fastened to the fourth mounting plate 412 on the second pipe beam 41 via a rear diagonal reinforcing plate 35. In this way, the entire middle section forms a high-rigidity frame structure with a relatively high Z-axis height. At the same time, the first main longitudinal beam 31 and the second main longitudinal beam 32 have larger cross sections than the first secondary longitudinal beam 33 and the second secondary longitudinal beam 34, forming a structure that is strong at the top and weak at the bottom, which reduces the overall weight while ensuring load-bearing capacity.

[0065] The upper two sides of the mounting plate assembly 36 are respectively attached to the web surfaces of the first main longitudinal beam 31 and the second main longitudinal beam 32, and are fastened with several bolts and nuts. The lower two sides of the mounting plate assembly 36 are respectively attached to the web surfaces of the first secondary longitudinal beam 33 and the second secondary longitudinal beam 34, and are fastened with several bolts and nuts. The mounting plate assemblies 36 are spaced close together. Inner brackets 11 are installed on both sides of the mounting plate assembly 36. Each inner bracket 11 has a vertical Y-axis mounting surface and a vertical Z-axis mounting surface. The vertical Y-axis mounting surface has several Y-axis through holes, and the vertical Z-axis mounting surface has one Z-axis through hole. The Y-axis through holes are used to fix the inner brackets 11, and the Z-axis through holes are used to install the battery pack 7.

[0066] The right guardrail assembly 50 consists of an upper right side beam 51, a lower right 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 in the middle longitudinal beam hanging plate assembly. The upper right side beam 51 and the lower right side beam 52 are connected by several hanging plates to form a whole. The upper right side beam 51 has a slightly larger cross-section and thickness, while the lower right side beam 52 has a slightly smaller cross-section and thickness, forming a structure that is stronger at the top and weaker at the bottom, thus reducing the overall weight while ensuring load-bearing capacity. The front end of the upper right side beam 51 is connected to the small mounting surface on the outer side of the first right wing side beam 23, and the rear end of the upper right side beam 51 is connected to the small mounting surface on the outer side of the second right wing side beam 43, connecting the right guardrail assembly 50 to the first crossbeam assembly 20 and the second crossbeam assembly 40.

[0067] The left guardrail assembly 60 consists of an upper left side beam 61, a lower left side 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 in the middle longitudinal beam hanging plate assembly. The left guardrail assembly 60 is symmetrical to the right guardrail assembly 50. The front end of the upper left side beam 61 is connected to the outer small mounting surface of the first left wing side beam 22, and the rear end of the upper left side beam 61 is connected to the outer small mounting surface of the second left wing side beam 42, so that the left guardrail assembly 60 is connected to the first crossbeam assembly 20 and the second crossbeam assembly 40.

[0068] External brackets 15 are mounted on the first left mounting plate 63, the second left mounting plate 65, the first right mounting plate 53, the universal mounting plate 54, the second right mounting plate 55, and the third right mounting plate 56, respectively. The number of external brackets 15 on each component is the same as the number of layers of the battery pack 7. Each external bracket 15 has a vertical Y-axis mounting surface and a vertical Z-axis mounting surface. The vertical Y-axis mounting surface has several Y-axis through holes, and the vertical Z-axis mounting surface has one Z-axis through hole. The Y-axis through holes are used to fix the external bracket 15, and the Z-axis through hole is used to install the battery pack 7.

[0069] The front baffle assembly 70 consists of a left front baffle 71, a right front baffle 72, a front center 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 to the lower left side beam 62 of the left guardrail assembly 60 via the front left corner connecting support 74, and the right front baffle 72 is connected to the lower right side beam 52 of the right guardrail assembly 50 via the right front corner connecting support 75. The inner sides of the left front baffle 71 and the right front baffle 72 are fastened to the front center connecting support 73. The front center connecting support 73 is fitted against the web surface of the first secondary longitudinal beam 33 and the second secondary longitudinal beam 34. The front center connecting support 73 is fastened together with the front end of the first secondary longitudinal beam 33 and the second secondary longitudinal beam 34 and the two inclined reinforcing plates 35, thereby connecting the front baffle assembly 70 and the longitudinal beam assembly 30. Meanwhile, the upper part of the left front baffle 71 is fastened to 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 to the second lower mounting plate 231 of the first right wing side beam 23.

[0070] The rear baffle assembly 80 consists of a rear baffle 81, a left connecting plate 82, a right connecting plate 83, a central connecting support 84, a rear left corner connecting support 85, and a rear right corner connecting support 86. The rear baffle 81 is connected to the lower left side beam 62 of the left guardrail assembly 60 via the rear left corner connecting support 85, and to the lower right side beam 52 of the right guardrail assembly 50 via the rear right corner connecting support 86. The rear central connecting support 84 is fitted against the web surface of the first secondary central longitudinal beam 33 and the second secondary central longitudinal beam 34, and is fastened to the rear ends and two diagonal reinforcing plates 35 of the first secondary central longitudinal beam 33 and the second secondary central longitudinal beam 34, thus connecting the rear baffle assembly 80 to the central longitudinal beam assembly 30. Simultaneously, the rear baffle 81 is fastened to the third lower mounting plate 421 of the second left wing side beam 42 via 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.

[0071] The anti-collision reinforcement bar assembly 90 consists of four first anti-collision reinforcement bars 91, four second anti-collision reinforcement bars 92, and one third anti-collision reinforcement bar 93. The anti-collision reinforcement bar assembly 90 directly connects the weaker parts of the left guardrail assembly 60 and the right guardrail assembly 50 to the central longitudinal beam assembly 30, thereby increasing the rigidity of the frame structure formed in front and providing effective lateral protection for the installed battery pack.

[0072] The above connections form a battery pack frame 6 for mounting the battery pack 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.

[0073] The battery pack 7 includes a battery cell 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. A threaded blind bushing 13 is provided in each inner mounting hole, and an outer sleeve 16 with a through hole is provided in each outer mounting hole.

[0074] As shown in Figure 3, 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 secured with bolts passing through the Z-direction through-hole of the inner bracket 11 and screwed into the blind hole bushing 13. The outer side is secured with bolts passing through the Z-direction through-hole of the outer bracket 15 and the outer sleeve 16, and then secured with nuts. The front axle 3, front suspension 5, steering gear 4, etc., are fixed to the left front longitudinal beam 24 and right front longitudinal beam 25 of the battery pack frame 6. The rear tube beam 8, rear suspension 9, and drive axle 10 equipped with the motor are installed on the left rear longitudinal beam 44 and right rear longitudinal beam 45. The chassis 2 is then assembled by mounting the wheels and tires onto the front axle 3 and rear drive axle 10, respectively.

[0075] 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 on the front of the chassis 2.

[0076] 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 having a battery pack frame, comprising a cab having a driver's seat and a chassis, the cab being mounted over a front portion of the chassis, further comprising at least one electric motor and at least one battery pack supplying electric energy to the electric 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, thereby forming two battery pack installation chambers separated by the middle longitudinal beam assembly. Each battery pack installation chamber contains at least one battery pack.

2. The electric commercial vehicle having a battery pack frame according to claim 1, characterized by, 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 surface of the middle part of the first tube beam, and a second mounting plate is provided on the lower surface of the middle part of the first tube beam. 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.

3. The electric commercial vehicle having a battery pack frame according to claim 2, characterized by, 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 surface of the middle part of the second tube beam, and a fourth mounting plate is provided on the lower surface of the middle part of the second tube beam. The second left wing side beam is fixedly connected to the left rear longitudinal beam, and the second tube 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 tube beam is fixedly connected to the right rear longitudinal beam.

4. The electric commercial vehicle having a battery pack frame according to claim 3, characterized by, 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 connected to the first main longitudinal beam and the second main longitudinal beam, respectively; the lower two sides of the mounting plate assembly are connected to the first secondary longitudinal beam and the second secondary longitudinal beam, respectively; the mounting plate assembly is equipped with inner brackets on both sides, and the inner brackets are used to install the battery pack.

5. The electric commercial vehicle having a battery pack frame according to claim 4, characterized by, 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 for installing a battery pack is installed on the first left hanging plate, the first universal hanging plate, and the second left hanging plate.

6. The electric commercial vehicle having a battery pack frame according to claim 5, characterized by, 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 for installing battery packs.

7. The electric commercial vehicle having a battery pack frame according to claim 6, characterized by, 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.

8. The electric commercial vehicle having a battery pack frame according to claim 6, characterized by, 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.

9. The electric commercial vehicle having a battery pack frame according to claim 1, characterized by, The reinforcing rod assembly is composed of several anti-collision reinforcing rods, which connect the middle positions of the left and right guardrail assemblies with the middle longitudinal beam assembly.

10. The electric commercial vehicle having a battery pack frame according to claim 1, characterized by, The battery pack comprises a battery cell 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.

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