New energy vehicle chassis and new energy vehicle

Abstract

The invention relates to the field of new energy vehicle chassis, in particular to a new energy vehicle chassis and a new energy vehicle, comprising: a frame comprising two symmetrically arranged frame longitudinal beams and a plurality of frame cross beams connected between the two frame longitudinal beams; the battery frame is integrated on the frame, and the battery frame comprises at least one frame unit; when multiple frame units are arranged, the multiple frame units are sequentially arranged in the longitudinal direction and connected with one another, each frame unit comprises a frame cross beam and a frame longitudinal beam, the two frame cross beams are symmetrically arranged and fixedly connected through at least two frame longitudinal beams, and a containing groove used for containing a frame longitudinal beam is formed in the middle of each frame unit. The frame longitudinal beam is located in the containing groove and fixedly connected with the battery frame through a plurality of connecting pieces. The battery framework can be modularly designed, and the battery framework can be integrally assembled according to the number of the battery packs, so that the battery packs can be conveniently maintained.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicle chassis, and in particular to a new energy vehicle chassis and a new energy vehicle. Background Art

[0002] With the increasing global environmental awareness and increasingly stringent carbon emission regulations, the market demand for new energy vehicles, especially new energy vehicles, is growing rapidly. As the core equipment for urban logistics, long-distance transportation and construction, commercial vehicles are gradually transforming to electrification. Existing new energy vehicles generally use batteries as the main energy supply device, and chassis design is the key link to ensure battery safety and vehicle performance.

[0003] At present, the battery layout of new energy vehicles is gradually changing from rear-mounted to bottom-mounted. On the one hand, this design can make full use of the space under the vehicle and keep the center of gravity of the vehicle low, thereby improving the stability of the vehicle; on the other hand, it can also reduce the space occupied by the battery, so that the cargo box space can be maximized. However, the existing chassis and battery frame structure still have many shortcomings in practical applications.

[0004] In the prior art, most battery frames are designed for specific types of batteries and specific capacities, which means that once a battery frame is selected, its applicability is greatly limited. In addition, this type of battery frame usually adopts a fixed design, that is, one battery frame corresponds to one battery type or capacity, and cannot be flexibly modularized according to actual needs. This design limitation leads to the situation that when market demand changes, such as when a larger capacity battery is needed, the original battery frame is difficult to adapt to the new demand, and the only option is to replace the entire battery frame, which increases cost and complexity.

[0005] During the maintenance and replacement of battery packs, the fixed frame design in the prior art also exposes many inconveniences. Usually, in order to replace or repair the battery pack, the entire battery frame together with all the batteries needs to be disassembled, which is a time-consuming and laborious process. What's worse, this disassembly method may cause unnecessary damage to battery packs that have not failed, further increasing maintenance costs and time. Therefore, the battery frame design in the prior art is in urgent need of improvement to adapt to the growing and diversified needs and improve maintenance efficiency. Summary of the invention

[0006] The purpose of the present invention is to provide a new energy vehicle chassis, which can modularly design the battery frame and integrate the battery frame according to the number of battery packs to facilitate the maintenance of the battery packs.

[0007] Another object of the present invention is to provide a new energy vehicle, which can modularly design the battery frame and integrate the battery frame according to the number of battery packs to facilitate the maintenance of the battery packs.

[0008] The technical solution of the present invention is achieved in this way:

[0009] A new energy vehicle chassis, comprising:

[0010] A vehicle frame, comprising two symmetrically arranged frame longitudinal beams and a plurality of frame cross beams connected between the two frame longitudinal beams;

[0011] A battery frame, the battery frame is integrated with the vehicle frame, the battery frame includes at least one frame unit; when there are multiple frame units, the multiple frame units are sequentially arranged in the longitudinal direction and connected to each other, the frame unit includes a frame cross beam and a frame longitudinal beam, two frame cross beams are symmetrically arranged and connected and fixed by at least two frame longitudinal beams, a receiving groove for accommodating the frame longitudinal beam is opened in the middle of the frame unit, the frame longitudinal beam is located in the receiving groove and is connected and fixed to the battery frame by multiple connecting members;

[0012] The bottom of the frame unit is used for mounting a battery pack.

[0013] Furthermore, the frame crossbeam includes a middle crossbeam and side crossbeams, and two side crossbeams are symmetrically arranged on the left and right sides of the middle crossbeam.

[0014] Furthermore, the middle cross beam and the side cross beams are connected and fixed via vertical plates, and the middle cross beam and the vertical plates on both sides thereof together form the accommodating groove.

[0015] Furthermore, a support plate is provided at the bottom of the side cross beam.

[0016] Furthermore, at least one height-adjusting beam is arranged at the bottom of the frame beam.

[0017] Furthermore, the frame unit also includes a two-way connection casting, one end of which is connected to the vertical plate, and the other end of which is connected to the height-adjusting crossbeam.

[0018] Furthermore, the frame longitudinal beam is arranged at the top of the side cross beam and close to the vertical plate.

[0019] Furthermore, the height-adjusting crossbeam is a rectangular hollow tube, and at least one layer of horizontal reinforcing plate is arranged inside the height-adjusting crossbeam.

[0020] Furthermore, a plurality of hollow structures are provided on the frame cross beam and / or the frame longitudinal beam.

[0021] A new energy vehicle comprises the new energy vehicle chassis, wherein a plurality of battery packs are installed at the bottom of the battery frame.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In the present application, the battery frame is modularly designed, and the battery frame includes at least one frame unit. The battery pack can be installed at the bottom of the frame unit, and each frame unit can be integrated and assembled according to the number of battery packs. In this way, the modular assembly of battery frames with different wheelbases and different capacities can be met, and the battery packs can also be easily disassembled and maintained separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic diagram of the integrated design of the frame longitudinal beam and the battery frame assembly provided by the present invention;

[0026] Figure 2 A schematic diagram of the structure of a single frame unit module provided by the present invention;

[0027] Figure 3 A schematic diagram of a battery frame after two frame units provided by the present invention are connected;

[0028] Figure 4 A schematic diagram of the connection between the battery frame and the battery provided by the present invention;

[0029] Figure 5 A three-dimensional schematic diagram of the height-adjusting crossbeam provided by the present invention;

[0030] Figure 6 A three-dimensional schematic diagram of an electric truck chassis provided by the present invention.

[0031] In the figure:

[0032] 1-frame; 101-frame longitudinal beam; 2-battery frame;

[0033] 3-Adjust the crossbeam; 4-Side crossbeam; 5-Middle crossbeam;

[0034] 6-bidirectional connection casting; 7-frame longitudinal beam; 8-vertical plate;

[0035] 9-accommodation slot; 10-hollow structure; 11-battery pack. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of 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.

[0042] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0043] Example 1

[0044] Reference Figure 1-Figure 6 , this embodiment provides a new energy vehicle chassis, including:

[0045] The vehicle frame 1 comprises two symmetrically arranged vehicle frame longitudinal beams 101 and a plurality of vehicle frame 1 cross beams connected between the two vehicle frame longitudinal beams 101;

[0046] A battery frame 2 is integrated with the vehicle frame 1 , and the battery frame 2 includes at least one frame unit; the number of frame units can be designed according to the actual capacity requirement of the vehicle.

[0047] The bottom of the frame unit is used to install the battery pack 11. When there are multiple frame units, the multiple frame units are arranged in sequence along the longitudinal direction and connected to each other. The multiple frame units are connected in series along the longitudinal direction, so that more battery packs 11 can be installed to increase the total capacity. Adjacent frame units can be fixed by multiple bolts.

[0048] The frame unit includes a frame crossbeam and a frame longitudinal beam 7, the two frame crossbeams are symmetrically arranged and connected and fixed by at least two frame longitudinal beams 7, and a receiving groove 9 for accommodating the frame longitudinal beam 101 is opened in the middle of the frame unit, and the frame longitudinal beam 101 is placed in the receiving groove 9 accordingly. The frame longitudinal beam 101 is located in the receiving groove 9 and is connected and fixed to the battery frame 2 through multiple connecting parts (such as bolts and clips).

[0049] Specifically, the frame crossbeam includes a middle crossbeam 5 and a side crossbeam 4. Two side crossbeams 4 are symmetrically arranged on the left and right sides of the middle crossbeam 5. A support plate is arranged at the bottom of the side crossbeam 4, which can play a supporting role. The length of the middle crossbeam 5 corresponds to the width between the two frame longitudinal beams 101, and the length of the side crossbeam 4 determines the overall width of the battery frame 2. After the battery frame 2 is installed on the frame longitudinal beam 101, the side crossbeams 4 on the left and right sides are divided by the two frame longitudinal beams 101 to form a receiving cavity A and a receiving cavity C, and the two ends of the middle crossbeam 5 are respectively connected to the two frame longitudinal beams 101 through connecting castings, and the area between the middle crossbeams 5 forms a receiving cavity B (such as Figure 1 ).

[0050] The middle cross beam 5 and the side cross beams 4 are connected and fixed via vertical plates 8 , and the middle cross beam 5 and the vertical plates 8 on both sides thereof together form the receiving groove 9 .

[0051] At least one height-adjustable crossbeam 3 is provided at the bottom of the frame crossbeam. When the number of height-adjustable crossbeams 3 is two or more, they can be stacked on top of each other in the vertical direction. The battery pack 11 can be installed at the bottom of the height-adjustable crossbeam 3. By changing the number of height-adjustable crossbeams 3, the height at which the battery pack 11 is located after installation can be adjusted, thereby adjusting the center of gravity height of the vehicle. The upper surface of the height-adjustable crossbeam 3 is in contact with the pallet, and the lower surface is in contact with the battery pack 11. The height-adjustable crossbeam 3 and the pallet are fixed by bolts, and the stacked height-adjustable crossbeams 3 are also connected and fixed by bolts. The number of the battery packs 11 is determined according to the working conditions of the truck and the required power. Compared with the prior art solution, since the battery frame 2 does not have the structure of a base combined with a skeleton, after the battery pack 11 is installed at the bottom of the height-adjustable crossbeam 3, the battery pack 11 can be directly loaded and unloaded from the bottom of the battery frame 2, ensuring the convenience of disassembly, assembly and maintenance.

[0052] The frame unit further includes a bidirectional connection casting 6. One end of the bidirectional connection casting 6 is connected to the vertical plate 8, and the other end is connected to the height-adjustable crossbeam 3. The bidirectional connection casting 6 can connect the vehicle frame longitudinal beam 101, the frame longitudinal beam 7 and the height-adjustable crossbeam 3 together at the same time, increasing the torsional strength and improving the connection reliability of the battery frame 2.

[0053] The frame longitudinal beam 7 is provided at the top of the side crossbeam 4 and close to the vertical plate 8. The frame longitudinal beams 7 are respectively provided on the left and right side crossbeams 4. The opposite two side crossbeams 4 are connected by the frame longitudinal beam 7. The vehicle frame longitudinal beam 101 is located in the receiving groove 9, and the frame longitudinal beam 7 abuts against the outside of the vehicle frame longitudinal beam 101, further improving the connection stability therebetween (as Figure 2 shown).

[0054] Specifically, the height-adjustable crossbeam 3 is made of a rectangular hollow tube, and at least one layer of horizontal reinforcing plates is provided inside the height-adjustable crossbeam 3. When one layer of horizontal reinforcing plate is provided inside the height-adjustable crossbeam 3, the longitudinal section of the height-adjustable crossbeam 3 is in the shape of a Chinese character 'Ri'; when two layers of horizontal reinforcing plates are provided inside the height-adjustable crossbeam 3, the longitudinal section of the height-adjustable crossbeam 3 is in the shape of a Chinese character 'Mu'.

[0055] Preferably in this embodiment, two layers of horizontal reinforcing plates are provided inside the height-adjustable crossbeam 3.

[0056] A plurality of hollow structures 10 are provided on the frame crossbeam and / or the frame longitudinal beam 7 to realize the lightweight design of the battery frame 2.

[0057] This application adopts the above design scheme:

[0058] On the one hand, the battery frame 2 of the present invention is directly combined with the frame longitudinal beam 101 to form an integrated support structure. In traditional chassis design, the frame 1 usually includes a combination of longitudinal beams and cross beams. Although this design can effectively support the vehicle body and the battery pack 11, it will cause the chassis weight to be too large, affecting the energy efficiency and endurance of the entire vehicle. The present invention designs the battery frame 2 as an extension of the frame longitudinal beam 101, embeds the battery frame 2 into the structural system of the frame longitudinal beam 101, and eliminates the independent configuration of the traditional cross beam, so that the battery frame 2 can provide stable support while also serving as a load-bearing component of the chassis. This design reduces the total weight of the frame 1 while maintaining the rigidity and torsional resistance of the structure;

[0059] Secondly, the battery frame 2 adopts a modular design and is composed of several standardized frame unit modules. The material of each module is made of high-strength, lightweight materials, with independent load-bearing capacity and good durability. The frame unit modules are fixed by standardized connectors (such as bolts, buckles, etc.). This design greatly simplifies the production and assembly process, so that the battery frame 2 can be pre-assembled and debugged in the factory, and then quickly integrated into the production line of the whole vehicle. In addition, another important advantage of the modular design is the convenience of maintenance and replacement. In the actual operation of the vehicle, the loss of the battery pack 11 and the wear of the battery frame 2 are inevitable. The traditional fixed battery frame 2 requires disassembly of a large number of chassis structures during maintenance, while the modular frame design of the present invention allows the damaged modules to be disassembled and replaced individually without large-scale disassembly of the entire vehicle chassis, which significantly reduces maintenance time and cost. The modular design also supports personalized configuration. According to different vehicle models and application scenarios, the number of frame modules can be flexibly increased or decreased to meet diverse market needs;

[0060] Thirdly, the battery frame 2 bracket part of the present invention adopts an innovative height-adjusting crossbeam 3 design, which is equivalent to heightening the pad to adjust the installation height of the battery pack 11. The height-adjusting crossbeam 3 is made of a lightweight high-strength alloy material, and has the characteristics of light weight and high strength. The height-adjusting crossbeam 3 can be designed as a multi-layer adjustable structure according to quantity requirements. By adjusting the number of layers or positions of the pad, the installation height of the battery pack 11 can be flexibly adjusted, thereby optimizing the distribution of the center of gravity of the vehicle body and improving the driving stability of the vehicle under different loads and road conditions.

[0061] The specific height adjustment of the height adjustment beam 3 is achieved as follows: the height adjustment beam 3 is provided with a plurality of mounting holes, which are fixedly connected to the battery frame 2 by bolts or other connectors. According to actual needs, the height of the height adjustment beam 3 is changed to place the battery pack 11 in an ideal installation position. This design is particularly suitable for variable usage environments. For example, when the load is heavy, the battery height can be lowered to stabilize the vehicle body, and when a higher ground clearance is required, the battery height can be appropriately raised to prevent the battery pack 11 from being damaged by the impact of the ground on the vehicle;

[0062] In addition, the longitudinal section of the height-adjusting crossbeam 3 is in the shape of a cross-section, which enables it to have an adaptive vibration absorption function. Rubber shock-absorbing pads or other elastic materials are arranged between the upper and lower adjacent height-adjusting crossbeams 3. When the vehicle is driving on a bumpy road, it can effectively absorb the vibration caused by the uneven road surface, reduce the impact on the battery pack 11, and extend the service life of the battery pack 11 and its frame. This design not only ensures the performance of the entire vehicle, but also significantly improves the safety and ride comfort of the vehicle.

[0063] In addition, the main body of the battery frame 2 of the present invention is made of a lightweight material, high-strength aluminum alloy, to achieve the goal of weight reduction while maintaining sufficient structural strength and corrosion resistance. The design of the battery frame 2 can be optimized through computer-aided design (CAD) and finite element analysis (FEA) to ensure that the frame can remain stable under various complex working conditions.

[0064] The battery frame 2 is internally provided with reinforcing beams and transverse supports (i.e., frame longitudinal beams 7 and frame cross beams), forming a multi-level force transmission path, which not only improves the overall rigidity of the battery frame 2, but also effectively disperses stress in extreme cases and protects the battery pack 11 in the battery frame 2. The battery pack 11 is fixed to the frame by quick-release buckles or bolts, which not only ensures the firmness of the installation, but also facilitates subsequent maintenance and replacement operations.

[0065] Space utilization and vehicle performance improvement: Due to the integrated design of the battery frame 2 and the frame longitudinal beam 101, the present invention optimizes the space utilization of the frame 1 without occupying the space in the vehicle cargo box. This bottom-mounted battery layout significantly lowers the center of gravity of the vehicle, effectively improving the stability and handling performance of the vehicle when driving at high speeds. Especially in heavy-duty commercial vehicles, by reasonably configuring the position of the battery frame 2 and the frame 1, the risk of rollover caused by a high center of gravity can be effectively avoided, thereby improving the driving safety of the vehicle.

[0066] The battery frame 2 adopts a modular production method. The chassis and battery frame 2 of the present invention not only saves a lot of materials and man-hours in the production process, but also greatly simplifies the manufacturing process. The standardized design of each frame unit module makes the production line highly automated and realizes large-scale batch production, reducing production costs. For new energy commercial vehicle manufacturers, this design concept brings significant economic benefits and market competitiveness.

[0067] Example 2

[0068] A new energy vehicle (such as an electric truck, such as Figure 6 ), including the new energy vehicle chassis, a plurality of battery packs 11 are installed at the bottom of the battery frame 2, and the layout of the bottom-mounted batteries significantly lowers the center of gravity of the vehicle, effectively improving the stability and handling performance of the vehicle when driving at high speeds.

[0069] The beneficial effects of the technical solution of the present invention are:

[0070] The present invention proposes an innovative chassis for new energy commercial vehicles. The design considers the battery frame 2 and the frame longitudinal beam 101 as an integrated design method, and replaces part of the traditional cross beam of the frame 1 with part of the structure of the battery frame 2, thereby achieving system lightweighting of the frame 1 and the battery frame 2; a modular design concept is introduced, and the battery frame 2 is modularly designed with the battery pack 11 as a unit, and the battery frame 2 is integrated and assembled according to the number of battery packs 11; an adjustable pad is developed to achieve height adjustment of the battery frame 2, thereby enhancing the adaptability of the vehicle in different usage scenarios and different brands of battery models; the battery frame 2 has no base frame, which is convenient for the installation and removal of the battery pack 11. Through these technical innovations, the present invention aims to solve the above-mentioned problems existing in the prior art and provide an efficient and reliable technical solution for the development of the new energy commercial vehicle industry.

[0071] 1. Lightweight design: By eliminating the traditional cross beam, replacing part of the cross beam with the battery frame 2 and directly combining it with the longitudinal beam, eliminating the bottom frame of the battery frame 2, and using new materials to replace traditional steel materials, the present invention significantly reduces the overall weight of the chassis, optimizes the energy efficiency performance of the whole vehicle, and extends the cruising range.

[0072] 2. Modular design: Standardized module design facilitates large-scale industrial production, improves assembly efficiency, and reduces manufacturing costs. At the same time, the design of the modular battery frame 2 facilitates the free addition and removal of battery packs 11, reducing the difficulty of chassis modification for different wheelbases and different power requirements.

[0073] 3. Universal design for different ground clearances and different brands of batteries: The adjustable height function of the adjustment pad design enables the battery pack 11 to be flexibly adjusted according to actual usage requirements, thereby improving the vehicle's adaptability and stability under various road conditions and facing different battery suppliers.

[0074] 4. Improved safety performance: By optimizing the structural design and material selection of the battery frame 2, the strength and durability of the frame are improved, effectively protecting the battery pack 11 from impact damage; the vibration absorption function of the pad further improves the driving safety of the entire vehicle.

[0075] 5. Space optimization: The innovative chassis and battery frame 2 layout greatly improves the vehicle's space utilization, lowers the center of gravity of the vehicle, improves vehicle handling, and adapts to the application requirements of different commercial vehicle scenarios.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A new energy vehicle chassis, characterized in that: include: A vehicle frame (1) comprises two symmetrically arranged vehicle frame longitudinal beams (101) and a plurality of vehicle frame (1) cross beams connected between the two vehicle frame longitudinal beams (101); A battery frame (2), the battery frame (2) being integrated into the vehicle frame (1), the battery frame (2) comprising at least one frame unit; when there are multiple frame units, the multiple frame units are arranged in sequence along the longitudinal direction and are connected to each other, the frame unit comprising a frame crossbeam and a frame longitudinal beam (7), the two frame crossbeams being symmetrically arranged and connected and fixed by at least two frame longitudinal beams (7), a receiving groove (9) for receiving the frame longitudinal beam (101) being provided in the middle of the frame unit, the frame longitudinal beam (101) being located in the receiving groove (9) and connected and fixed to the battery frame (2) by multiple connecting members; The bottom of the frame unit is used for mounting a battery pack (11).

2. The new energy vehicle chassis according to claim 1, characterized in that: The frame cross beam comprises a middle cross beam (5) and side cross beams (4), and two side cross beams (4) are symmetrically arranged on the left and right sides of the middle cross beam (5).

3. The new energy vehicle chassis according to claim 2, characterized in that: The middle cross beam (5) and the side cross beam (4) are connected and fixed via vertical plates (8), and the middle cross beam (5) and the vertical plates (8) on both sides thereof together form the accommodation groove (9).

4. The new energy vehicle chassis according to claim 3, characterized in that: A supporting plate is provided at the bottom of the side cross beam (4).

5. The new energy vehicle chassis according to claim 4, characterized in that: At least one height-adjusting crossbeam (3) is arranged at the bottom of the frame crossbeam.

6. The new energy vehicle chassis according to claim 5, characterized in that: The frame unit further comprises a bidirectional connection casting (6), one end of the bidirectional connection casting (6) being connected to the vertical plate (8) and the other end being connected to the height-adjusting crossbeam (3).

7. The new energy vehicle chassis according to claim 6, characterized in that: The frame longitudinal beam (7) is arranged at the top of the side cross beam (4) and close to the vertical plate (8).

8. The new energy vehicle chassis according to claim 5, characterized in that: The height-adjusting crossbeam (3) is a rectangular hollow tube, and at least one layer of horizontal reinforcing plate is arranged inside the height-adjusting crossbeam (3).

9. The new energy vehicle chassis according to claim 1, characterized in that: A plurality of hollow structures (10) are provided on the frame cross beam and / or the frame longitudinal beam (7).

10. A new energy vehicle, characterized in that: Comprising the new energy vehicle chassis according to any one of claims 1 to 9, a plurality of battery packs (11) are installed at the bottom of the battery frame (2).

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