Vehicle chassis assembly and vehicle

Abstract

The application provides a vehicle chassis assembly and a vehicle, and relates to the technical field of vehicles, and aims to solve the problems of heavy weight and poor endurance of new energy tractors in the prior art. The vehicle chassis assembly comprises a vehicle frame, an axle, a power assembly and a range extending assembly. The vehicle frame comprises two longitudinal beams and at least two cross beams. The two ends of the cross beams are connected to the two longitudinal beams respectively. The longitudinal beams and the cross beams form a battery replacement frame. The battery replacement frame is provided with a power battery. The axle comprises a front axle, a middle axle and a rear axle. The front axle, the middle axle and the rear axle are arranged on the vehicle frame. The power assembly is connected to the output end of the power battery. The range extending assembly comprises a methanol fuel tank and a range extender. The methanol fuel tank is arranged on the side of the vehicle frame and located between the front axle and the middle axle. The range extender is arranged on the vehicle frame and located between the front axle and the vehicle frame. The range extender is connected to the methanol fuel tank through a pipeline to generate electric energy through the combustion of methanol fuel. The range extender and the power battery are electrically connected, thereby improving the endurance of the tractor.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more particularly to a vehicle chassis assembly and a vehicle. Background Technology

[0002] In order to address global warming and reduce carbon dioxide emissions, the energy use of heavy-duty tractors is gradually shifting from traditional fossil fuels to green new energy sources with environmental and renewable advantages.

[0003] In related technologies, heavy-duty tractor units for new energy vehicles are currently mainly used in closed areas, including ports and steel mills, or for some short-distance road transportation, with a transport distance typically within 150km.

[0004] However, new energy vehicles are generally 2-3 tons heavier than traditional energy vehicles, resulting in reduced cargo capacity and lower economic efficiency. At the same time, their lower range makes them unsuitable for long-distance transportation scenarios. Summary of the Invention

[0005] This invention provides a vehicle chassis assembly and a vehicle for use as a tractor, thereby improving the tractor's range and making it suitable for medium- and long-distance operating conditions.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A first aspect of the present invention provides a vehicle chassis assembly comprising:

[0008] The vehicle frame includes two longitudinal beams arranged along a first direction and at least two transverse beams arranged along a second direction. The two ends of each transverse beam are respectively connected to the two longitudinal beams. The longitudinal beams and the transverse beams are orthogonal and enclose each other to form a battery swapping frame. A power battery is provided inside the battery swapping frame.

[0009] The axle includes a front axle, a middle axle, and a rear axle arranged sequentially at intervals along the first direction, wherein the front axle, the middle axle, and the rear axle are all mounted on the vehicle frame;

[0010] A powertrain, which is connected to the output terminal of the power battery, is disposed on the side of the battery swapping frame facing the front axle;

[0011] The range extender assembly includes a methanol fuel tank and a range extender. The methanol fuel tank is disposed on the side of the vehicle frame along the second direction and located between the front axle and the middle axle in the first direction. The range extender is disposed on the vehicle frame and located between the front axle and a first end of the vehicle frame in the first direction. The range extender is connected to the methanol fuel tank through a pipeline to generate electrical energy through the combustion of methanol fuel. The range extender is electrically connected to the power battery.

[0012] The vehicle chassis assembly provided in this embodiment of the invention has at least the following beneficial effects:

[0013] The powertrain combines a high-horsepower range extender with a small-capacity battery. The range extender and the electric drive system are completely decoupled, meaning that the operation of the range extender and the vehicle's electric drive system are controlled separately. This ensures that the range extender always operates in the optimal economic zone, which is the state in which the internal combustion engine of the range extender generates power with the highest fuel efficiency under certain load and speed. In other words, by using the range extender as the main driving force source, the energy storage requirements of the battery are reduced, the number of batteries in the battery pack is reduced, and thus battery costs and vehicle weight are significantly reduced.

[0014] Methanol is a green and environmentally friendly fuel with long-lasting range. Compared with conventional fuels such as gasoline and diesel, methanol has a higher oxygen content, higher octane number, and higher latent heat of vaporization, resulting in more complete combustion and higher combustion efficiency. At the same time, the combustion process of methanol requires less air, thus producing fewer pollutants, including nitrogen oxides, significantly reducing emissions of carbon monoxide (CO) and hydrocarbons (HC), and producing no particulate matter or sulfides.

[0015] In one possible implementation, the powertrain includes an electric drive system and an auxiliary drive system. The electric drive system includes two drive motors electrically connected to the power battery. The two drive motors are respectively mounted on the middle axle and the rear axle to drive the middle axle and the rear axle to rotate.

[0016] The auxiliary drive system includes an auxiliary drive controller and an auxiliary drive motor that are electrically connected. A mounting bracket is provided on the side of the longitudinal beam away from the power battery. The auxiliary drive controller and the auxiliary drive motor are fixed on the mounting bracket. The drive motor, the power battery, and the range extender are all electrically connected to the auxiliary drive controller so that the auxiliary drive controller provides electrical energy from at least one of the power battery and the range extender to the auxiliary drive motor.

[0017] In one possible implementation, the chassis assembly further includes a fuel tank, and a bracket is provided on the side of the longitudinal beam opposite to the power battery. The bracket is used to support the fuel tank, and the fuel tank is supported by the bracket above the auxiliary drive controller.

[0018] In one possible implementation, a gantry frame is mounted on the longitudinal beam along the first direction, and the gantry frame is located between the front axle and the power battery for installation in conjunction with the driver's cab; a high-voltage power distribution box is also mounted on the chassis below the gantry frame, and the high-voltage power distribution box is electrically connected to the power battery and the auxiliary drive motor.

[0019] In one possible implementation, the chassis assembly further includes a braking system mounted on the frame, the braking system including an air pump, a control valve, and an air reservoir, the air pump being electrically connected to the range extender via the control valve, the air pump having an air outlet, and the air reservoir being connected to the air outlet.

[0020] In one possible implementation, the chassis assembly further includes a heat dissipation assembly mounted on the frame, the heat dissipation assembly being located on the side of the range extender facing the first end of the frame;

[0021] The heat dissipation assembly includes a first heat dissipation unit and a second heat dissipation unit. The first heat dissipation unit includes a water pump, a first heat exchanger, and a second heat exchanger. The water pump has a first liquid channel and a second liquid channel. The first liquid channel and the first heat exchanger form a first heat exchange circuit, and the first heat exchanger is used to dissipate heat from the range extender. The second liquid channel and the second heat exchanger form a second heat exchange circuit, and the second heat exchanger is used to exchange heat with the power battery and the cab on the vehicle frame.

[0022] The second heat dissipation unit includes a condenser, a compressor, an evaporator, and a cooler connected by pipes. The cooler is connected to the power battery and is used to cool the power battery.

[0023] The refrigerator is connected to the condenser, the refrigerator is connected to the compressor, the compressor is connected to the condenser, the evaporator is connected to the condenser, the evaporator is connected to the compressor, and the evaporator is located in the cab for cooling the cab.

[0024] In one possible implementation, the cooler has a first water inlet, a first water outlet, a second water inlet, and a second water outlet, wherein the first water inlet is connected to the second end of the power battery, and the first water outlet is connected to the first end of the power battery.

[0025] The second water inlet is connected to the liquid outlet of the condenser, the second water outlet is connected to the liquid inlet of the compressor, the air outlet of the compressor is connected to the air inlet of the condenser, the liquid inlet of the evaporator is connected to the liquid outlet of the condenser, and the air outlet of the evaporator is connected to the air inlet of the compressor.

[0026] The cooling system further includes a first control valve and a second control valve. The first control valve has a first end, a second end and a third end. The first end is connected to the second pump inlet, the second end is connected to the second heat exchanger, and the third end is connected to the first end of the cab.

[0027] The second control valve has a fourth end, a fifth end, and a sixth end. The fourth end is connected to the second heat exchanger, the fifth end is connected to the first water inlet end, and the sixth end is connected to the first end of the power battery.

[0028] In one possible implementation, a fan is provided on the side of the first heat exchanger.

[0029] In one possible implementation, the cooling system further includes a drive pump, the first end of which is connected to the first water outlet of the cooler, and the second end of which is connected to the second end of the power battery.

[0030] A second aspect of the present invention provides a vehicle comprising a chassis assembly provided by any of the technical solutions of the first aspect.

[0031] The beneficial effects provided by the second aspect of the present invention are substantially the same as those provided by the first aspect of the present invention, and will not be repeated here. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a vehicle chassis assembly provided in an embodiment of the present invention;

[0034] Figure 2 for Figure 1 Top view of the chassis components of the vehicle

[0035] Figure 3 for Figure 1 A schematic diagram of the layout of the cooling system in the chassis components of a vehicle.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100-frame;

[0038] 110 - Longitudinal beam;

[0039] 111-Mounting bracket; 112-Bracket; 113-Gantry frame;

[0040] 120 - Crossbeam; 130 - Power battery;

[0041] 200-Axle;

[0042] 210 - Front axle; 220 - Middle axle; 230 - Rear axle;

[0043] 300 - Powertrain;

[0044] 310-Electric drive system;

[0045] 320 - Auxiliary drive system; 321 - Auxiliary drive controller; 322 - High-voltage distribution box;

[0046] 400-Range Extender Component;

[0047] 410 - Range extender; 420 - Methanol fuel tank;

[0048] 500-gasoline tank;

[0049] 600-Braking System;

[0050] 700 - Heat dissipation component;

[0051] 710 - First heat dissipation unit;

[0052] 711-Water pump; 712-First heat exchanger; 713-Second heat exchanger; 714-Electrically driven heat exchanger;

[0053] 720 - Second heat dissipation unit;

[0054] 721 - Condenser; 722 - Compressor; 723 - Evaporator; 724 - Refrigerator;

[0055] 730 - First control valve; 740 - Second control valve; 750 - Fan; 760 - Drive pump. Detailed Implementation

[0056] As described in the background section, the energy used in heavy-duty commercial vehicles has shown a trend of transformation from traditional petrochemical energy to green new energy, and new energy models of heavy-duty commercial vehicles have been gradually promoted.

[0057] In related technologies, heavy-duty commercial vehicles with new energy models are currently mainly used in closed areas, including ports and steel mills, or for some short-distance road transportation. The transportation distance is usually within 150km. There are problems such as the fact that the weight of new energy models is generally 2-3 tons heavier than that of traditional energy models, resulting in reduced cargo capacity and lower economic efficiency. At the same time, the range is relatively low and cannot meet the needs of long-distance transportation scenarios.

[0058] The inventors discovered that the problem stems from the fact that traditional heavy-duty commercial vehicles primarily rely on conventional energy sources, including diesel and liquefied natural gas. New energy vehicles have a shorter range than traditional energy vehicles, limiting their transport distance. Related technologies for new energy heavy-duty commercial vehicles include pure electric heavy-duty truck tractors. These tractors are equipped with battery packs located at the rear or side to improve range. However, the wheelbase of these pure electric heavy-duty truck tractors is greater than or equal to 500mm longer than that of traditional energy vehicles. This results in a length exceeding regulatory limits, a reduction in vehicle weight of at least 2-3 tons, and higher vehicle costs.

[0059] In addition, related technologies for new energy heavy-duty commercial vehicles also include heavy-duty truck range extenders, which are equipped with range extenders for emergency power replenishment. However, the power generation of the range extender is relatively low, which means that the battery cannot meet the needs of the vehicle under full load. That is, under full load, the main power source of the vehicle is still provided by the power battery with a large amount of power. However, compared with pure electric vehicles, heavy-duty truck range extenders have added related components, including range extenders, intake and exhaust systems, fuel supply systems and cooling systems, which significantly increases the cost and weight of the vehicle. Moreover, the effect of improving the range problem of new energy heavy-duty commercial vehicles is not good.

[0060] To address the aforementioned technical problems, embodiments of the present invention provide a vehicle chassis assembly comprising a powertrain combining a high-horsepower range extender and a small-capacity power battery. The range extender is completely decoupled from the electric drive system, meaning the operation of the range extender and the vehicle's electric drive system are controlled separately. This ensures the range extender always operates within its optimal economic zone, where the optimal economic zone refers to the state where the range extender's internal combustion engine generates power with the highest fuel efficiency under certain load and speed. In other words, by using the range extender as the primary driving force, the energy storage requirements of the power battery are reduced, the number of batteries in the power battery is decreased, and consequently, battery costs and vehicle weight are significantly reduced.

[0061] Furthermore, the chassis component provided in this invention uses methanol as fuel, which is green, environmentally friendly, and has a long driving range. Compared with conventional fuels such as gasoline and diesel, methanol has a higher oxygen content, higher octane number, and higher latent heat of vaporization, resulting in more complete combustion and higher combustion efficiency. At the same time, the combustion process of methanol requires less air, thus producing fewer pollutants, including nitrogen oxides, significantly reducing emissions of carbon monoxide (CO) and hydrocarbons (HC), and producing no particulate matter or sulfide emissions.

[0062] Furthermore, in related technologies, the power battery is located at the rear of the vehicle. When the vehicle is involved in a head-on collision or sudden braking, the cargo or cab is likely to directly collide with the power battery, leading to spontaneous combustion. When the power battery is located on the side of the vehicle, the probability of spontaneous combustion is relatively high after a side collision. In this invention, the power battery is fixed to the frame by flexible components and is located inside the longitudinal beams of the frame. This allows the power battery to be structurally protected by the longitudinal beams of the frame and the chassis components on both sides of the frame, improving the structural stability and safety of the power battery when the vehicle is involved in a collision.

[0063] This invention employs an integrated electric drive axle, enabling a flexible connection between the power system and the drive shaft. The absence of a transmission shaft in the middle of the frame improves driving efficiency and space utilization. The power battery is positioned in the middle of the frame's longitudinal beams. Compared to related technologies, this structure reduces the overall weight of new energy tractor vehicles by 2-3 tons and increases the on-board weight by 2-3 tons. Furthermore, the tractor vehicle provided by this invention has a range of over 1000km, significantly expanding the application scope of new energy tractor vehicles compared to related technologies that can only be used for short-distance transportation of 200-400km.

[0064] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0065] To make the above-mentioned objectives, features, and advantages of the embodiments of the present invention more apparent and understandable, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] Firstly, combining Figure 1 and Figure 2 This invention provides a vehicle chassis assembly, which includes a frame 100. The frame 100 includes two longitudinal beams 110 arranged along a first direction and at least two transverse beams 120 arranged along a second direction. The two ends of the transverse beams 120 are respectively connected to the two longitudinal beams 110. The longitudinal beams 110 and the transverse beams 120 are orthogonal and enclose each other to form a battery swapping frame. A power battery 130 is provided inside the battery swapping frame.

[0067] The axle 200 includes a front axle 210, a middle axle 220 and a rear axle 230 arranged sequentially and at intervals along a first direction, and the front axle 210, the middle axle 220 and the rear axle 230 are all mounted on the frame 100.

[0068] The powertrain 300 is connected to the output end of the power battery 130 and is located on the side of the battery swapping frame facing the front axle 210.

[0069] The range extender assembly 400 includes a methanol fuel tank 420 and a range extender 410. The methanol fuel tank 420 is disposed on the side of the frame 100 in a second direction and is located between the front axle 210 and the middle axle 220 in a first direction. The range extender 410 is disposed on the frame 100 and is located between the front axle 210 and the first end of the frame 100 in the first direction. The range extender 410 is connected to the methanol fuel tank 420 through a pipeline to generate electrical energy through the combustion of methanol fuel. The range extender 410 is electrically connected to the power battery 130. Exemplarily, the range extender 410 is threadedly fixed to the longitudinal beam 110 of the frame 100.

[0070] It should be noted that the first direction is the length direction of the frame 100, and the second direction is the width direction of the frame 100.

[0071] Thus, compared with related range-extended tractor vehicles, the chassis components provided by this invention can significantly reduce the wheelbase, making the overall vehicle wheelbase consistent with traditional models, while reducing the weight by 2-3 tons, thereby increasing the vehicle's on-board weight by 2-3 tons. Combined with efficient methanol fuel range extender, the range can be increased to over 1000km, solving the problems of insufficient range and heavy weight of new energy tractor vehicles. It is green and environmentally friendly and conducive to market promotion. Moreover, compared with the chassis of tractor vehicles using diesel range extender 410, methanol range extender 410, due to its clean fuel properties, eliminates the need for a urea device, which can meet emission requirements and improve the space utilization rate on the chassis 100.

[0072] Furthermore, by arranging the power battery 130 inside the longitudinal beam 110 of the frame 100, wire holes and pipe holes can be opened in the cross beam 120 of the frame 100 to arrange the circuit harness and heat dissipation pipes. In addition, the cross beam 120 of the frame 100 is equipped with a fixed bracket 112, so that the frame 100 integrates the battery frame function. This structure not only ensures the overall rigidity and strength of the frame 100, but also further enhances the stability of the power battery 130, effectively ensuring the collision safety of the entire vehicle battery system.

[0073] In some embodiments, there are two methanol fuel tanks 420, located on both sides of the vehicle frame 100 along the second direction, and the volume of the methanol fuel tanks 420 is greater than or equal to 1000L.

[0074] In a possible implementation, the powertrain 300 includes an electric drive system 310 and an auxiliary drive system 320. The electric drive system 310 includes two drive motors electrically connected to the power battery 130. The two drive motors are respectively mounted on the middle axle 220 and the rear axle 230 to drive the middle axle 220 and the rear axle 230 to rotate. It may be understood that the middle axle 220 and the rear axle 230 are used to transmit power to the wheels mounted on themselves to move the vehicle.

[0075] The auxiliary drive system 320 includes an auxiliary drive controller 321 and an auxiliary drive motor that are electrically connected. A mounting bracket 111 is provided on the side of the longitudinal beam 110 away from the power battery 130. The auxiliary drive controller 321 and the auxiliary drive motor are fixed on the mounting bracket 111. The drive motor, the power battery 130 and the range extender 410 are all electrically connected to the auxiliary drive controller 321 so that the auxiliary drive controller 321 provides electrical energy from at least one of the power battery 130 and the range extender 410 to the auxiliary drive motor.

[0076] With this design, the electric drive system 310 is integrated on the middle axle 220 and the rear axle 230, improving transmission efficiency by using the power form of the electric drive axle. That is, it realizes a chassis component structure that combines the power forms of the high-horsepower methanol range extender 410, the power battery 130, and the electric drive axle. When used as a tractor, the range extender 410 can participate in the entire vehicle drive and can be configured with a full-range predictive energy management system. The setting of the auxiliary drive controller 321 can improve the distribution efficiency of the energy drive output of the range extender 410 and the power battery 130. In addition, the controller can also make the best match between the energy drive output of the range extender 410 and the power battery 130 through satellite map road condition recognition and vehicle load calculation, and systematically plan the operating power of the range extender 410 and the charging and discharging time of the power battery 130.

[0077] In some embodiments, the auxiliary drive system 320 further includes a low-voltage battery disposed on the mounting bracket 111. For example, the low-voltage battery is fixed to the mounting bracket 111 by bolts and is located on the side of the vehicle frame 100 along the second direction. The vehicle frame 100 is also equipped with an indicator light, a switch assembly, and a first controller electrically connected to the low-voltage battery. The first controller can be integrated with the auxiliary drive controller 321 or can be disposed separately. The indicator light and the switch assembly are both signal connected to the first controller to better realize the information indication function and power switching function of the vehicle components.

[0078] As an example, the chassis assembly also includes a fuel tank 500. The longitudinal beam 110 is provided with a bracket 112 on the side opposite to the power battery 130. The bracket 112 is used to support the fuel tank 500, and the fuel tank 500 is supported by the bracket 112 above the auxiliary drive controller 321. In this way, the rotation angle range of the cargo box mounted on the frame 100 can be avoided, and the fuel tank 500 and the cargo box can be prevented from contacting and colliding. While ensuring the compact structure, the legal standards for cargo box layout and rotation are met.

[0079] In another example, a gantry 113 is mounted on the longitudinal beam 110. Along the first direction, the gantry 113 is located between the front axle 210 and the power battery 130, and is used to cooperate with the cab for installation, so as to facilitate the fixation and movement limitation of the cab on the frame 100. The frame 100 is also equipped with a high-voltage distribution box 322 below the gantry 113. The high-voltage distribution box 322 is electrically connected to the power battery 130 and the auxiliary drive motor.

[0080] The structural design in this embodiment improves the space utilization of each component on the frame 100. Compared with related technologies, it reduces the redundant occupation of components on the side near the middle axle 220 and the rear axle 230, that is, it eliminates the rear module of the whole vehicle and further reduces the wheelbase of the whole vehicle.

[0081] In one possible implementation, the chassis assembly also includes a braking system 600 mounted on the frame 100. The braking system 600 includes an air pump, a control valve, and an air reservoir. The air pump is electrically connected to the range extender 410 via the control valve. The air pump has an air outlet, and the air reservoir is connected to the air outlet.

[0082] In other words, compared to the chassis components of range-extended tractors in related technologies, this embodiment replaces the electric air pump dominated by the power battery 130 in related technologies. The air pump is driven by the range extender 410, that is, the air pump of the braking system 600 is integrated into the range extender 410, reducing the energy consumption of the entire vehicle system. At the same time, the high operating frequency of the power battery 130 results in excessive noise in the vehicle under the electric air pump. Through the design of this embodiment, the noise, vibration, and harshness (NVH) performance of the entire vehicle is improved, while the space occupied on the frame 100 is reduced, making the chassis layout structure more reasonable. In contrast, the traditional air pump requires a separate bracket 112. This embodiment achieves weight reduction.

[0083] Based on the above embodiments, an improvement can be made by referring to... Figure 3 The chassis assembly also includes a heat dissipation assembly 700 mounted on the frame 100. The heat dissipation assembly 700 is located on the side of the range extender 410 facing the first end of the frame 100. The heat dissipation assembly 700 includes a first heat dissipation unit 710 and a second heat dissipation unit 720. The first heat dissipation unit 710 includes a water pump 711, a first heat exchanger 712 and a second heat exchanger 713. The water pump 711 has a first liquid channel and a second liquid channel. The first liquid channel and the first heat exchanger 712 form a first heat exchange circuit. The first heat exchanger 712 is used to dissipate heat from the range extender 410. The second liquid channel and the second heat exchanger 713 form a second heat exchange circuit. The second heat exchanger 713 is used to exchange heat between the power battery 130 and the cab on the frame 100.

[0084] The second heat dissipation unit 720 includes a condenser 721, a compressor 722, an evaporator 723 and a cooler 724 connected by pipes. The cooler 724 is connected to the power battery 130 and is used to cool the power battery 130.

[0085] The refrigerator 724 is connected to the condenser 721, the refrigerator 724 is connected to the compressor 722, the compressor 722 is connected to the condenser 721, the evaporator 723 is connected to the condenser 721, the evaporator 723 is connected to the compressor 722, and the evaporator 723 is located in the cab and is used to cool the cab.

[0086] In addition, the cab is equipped with an air conditioning blower for outputting warm air to maintain or increase the temperature of the cab.

[0087] A further improvement could be made to the refrigerator 724, which has a first water inlet, a first water outlet, a second water inlet, and a second water outlet. The first water inlet is connected to the second end of the power battery 130, and the first water outlet is connected to the first end of the power battery 130.

[0088] The second water inlet is connected to the liquid outlet of the condenser 721, the second water outlet is connected to the liquid inlet of the compressor 722, the air outlet of the compressor 722 is connected to the air inlet of the condenser 721, the liquid inlet of the evaporator 723 is connected to the liquid outlet of the condenser 721, and the air outlet of the evaporator 723 is connected to the air inlet of the compressor 722.

[0089] The cooling system also includes a first control valve 730 and a second control valve 740. The first control valve 730 has a first end, a second end and a third end. The first end is connected to the second pump inlet, the second end is connected to the second heat exchanger, and the third end is connected to the first end of the cab.

[0090] The second control valve 740 has a fourth end, a fifth end, and a sixth end. The fourth end is connected to the second heat exchanger, the fifth end is connected to the first water inlet end, and the sixth end is connected to the first end of the power battery 130.

[0091] As an example, the cooling system also includes a drive pump 760, the first end of which is connected to the first water outlet of the cooler 724, and the second end of which is connected to the second end of the power battery 130.

[0092] Furthermore, the heat dissipation system also includes an electric drive cooling system, which includes an electric drive heat exchanger 714 connected to the drive motor in the electric drive system 310, and the electric drive heat exchanger 714 is disposed between the condenser 721 and the first heat exchanger 712.

[0093] In a possible embodiment, a fan 750 is provided on the side of the first heat exchanger 712 to improve the heat dissipation efficiency for the first heat exchanger 712, the second heat exchanger 713 and the electrically driven heat exchanger 714.

[0094] This achieves integrated heat dissipation for the range extender 410, cab, power battery 130, and electric drive system 310. In particular, it enables simultaneous and coordinated cyclic cooling of the range extender 410, cab, and power battery 130, significantly optimizing the vehicle's thermal management system, thereby improving the vehicle's heat utilization efficiency and reducing energy consumption. Compared to the chassis of range-extended tractor vehicles in related technologies, it eliminates the need for a separately set battery cooling system, reduces redundant structures in the range-extended tractor vehicle, and lowers the overall vehicle cost.

[0095] In another example, a trailer towing seat is provided on the frame 100 between the middle axle 220 and the rear axle 230 for connecting the cargo box. The surface of the towing seat facing the top of the frame 100 is flush with the longitudinal beam 110, which optimizes the structural compactness and ensures the stability of the frame 100.

[0096] In other possible implementations, an energy management system is configured on the chassis assembly. Its controller can be integrated into the auxiliary drive controller 321 or set up separately. The controller controls the range extender 410 to select the optimal energy output point power based on the actual energy demand of the vehicle's operating conditions and the current charge level of the power battery 130. This allows the range extender 410 to generate electricity to power the drive motor and drive the vehicle. When the vehicle's power demand exceeds the current power provided by the range extender 410, the power battery 130 begins to discharge, working with the range extender 410 to output power to the drive motor, meeting the vehicle's driving energy requirements. When the battery charge is below a preset first threshold, the range extender 410 intermittently charges the power battery 130 based on the vehicle's real-time energy demand through optimal energy allocation. When the power battery charge is below a preset second threshold, the vehicle's output power is limited, prioritizing charging the power battery 130. The first threshold parameter of the power battery 130 can be set by the user according to operating conditions and vehicle usage habits.

[0097] The vehicle chassis component provided in this application embodiment can be applied to electric vehicles (EVs), pure electric vehicles (PEVs / BEVs), hybrid electric vehicles (HEVs), range-extended electric vehicles (REEVs), plug-in hybrid electric vehicles (PHEVs), and new energy vehicles.

[0098] Secondly, embodiments of the present invention provide a vehicle including a vehicle chassis assembly provided by any of the solutions in the first aspect.

[0099] Therefore, the second aspect also has the advantages of any of the vehicle chassis components in the first aspect, which will not be elaborated further in the embodiments of the present invention.

[0100] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, 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. Therefore, they should not be construed as limitations on this invention.

[0101] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0102] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0103] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0104] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0105] It should be noted that the embodiments referred to in the specification, such as "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments," may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions 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.

Claims

1. A vehicle chassis assembly, characterized by, The chassis assembly comprises: a vehicle frame comprising two longitudinal beams arranged along a first direction and at least two cross beams arranged along a second direction, two ends of the cross beams being connected to the two longitudinal beams respectively, the longitudinal beams and the cross beams forming a battery replacement frame, and a power battery being arranged in the battery replacement frame; a vehicle axle comprising a front axle, a middle axle and a rear axle arranged along the first direction in sequence, the front axle, the middle axle and the rear axle being arranged on the vehicle frame; a power assembly connected to an output end of the power battery, the power assembly being arranged on a side of the battery replacement frame facing the front axle; a range extending assembly comprising a methanol fuel tank and a range extender, the methanol fuel tank being arranged on a side of the vehicle frame along the second direction and between the front axle and the middle axle along the first direction, the range extender being arranged on the vehicle frame and between the front axle and a first end of the vehicle frame along the first direction, the range extender being connected to the methanol fuel tank through a pipeline to generate electric energy through combustion of methanol fuel, and the range extender and the power battery being electrically connected; the power assembly comprising an electric drive system and an auxiliary drive system, the electric drive system comprising two drive motors electrically connected to the power battery, the two drive motors being mounted on the middle axle and the rear axle respectively to drive the middle axle and the rear axle to rotate; the auxiliary drive system comprising an auxiliary drive controller and an auxiliary drive motor electrically connected to each other, a mounting rack being arranged on a side of the longitudinal beam away from the power battery, the auxiliary drive controller and the auxiliary drive motor being fixed on the mounting rack, the drive motor, the power battery and the range extender being electrically connected to the auxiliary drive controller, so that the auxiliary drive controller provides electric energy of at least one of the power battery and the range extender to the auxiliary drive motor.

2. The vehicle chassis assembly of claim 1, wherein, The chassis assembly further comprises a gasoline tank, a support being arranged on the side of the longitudinal beam away from the power battery, the support being used for supporting the gasoline tank, and the gasoline tank being supported above the auxiliary drive controller by the support.

3. The vehicle chassis assembly of claim 2, wherein, A gantry is arranged on the longitudinal beam and located between the front axle and the power battery along the first direction, and is used for being mounted with a cockpit; the vehicle frame is located below the gantry and further comprises a power distribution box electrically connected to the power battery and the auxiliary drive motor.

4. The vehicle chassis assembly of claim 1, wherein, The chassis assembly further comprises a braking system arranged on the vehicle frame, the braking system comprising a gas pump, a control valve and an air cylinder, the gas pump being electrically connected to the range extender through the control valve, the gas pump having a gas outlet, and the air cylinder being connected to the gas outlet.

5. The vehicle chassis assembly of any of claims 1-4, wherein, The chassis assembly further comprises a heat dissipation assembly mounted on the vehicle frame, the heat dissipation assembly being located on a side of the range extender facing the first end of the vehicle frame. The heat dissipation assembly includes a first heat dissipation unit and a second heat dissipation unit. The first heat dissipation unit includes a water pump, a first heat exchanger, and a second heat exchanger. The water pump has a first liquid channel and a second liquid channel. The first liquid channel and the first heat exchanger form a first heat exchange circuit, and the first heat exchanger is used to dissipate heat from the range extender. The second liquid channel and the second heat exchanger form a second heat exchange circuit, and the second heat exchanger is used to exchange heat with the power battery and the cab on the vehicle frame. The second heat dissipation unit includes a condenser, a compressor, an evaporator, and a cooler connected by pipes. The cooler is connected to the power battery and is used to cool the power battery. The refrigerator is connected to the condenser, the refrigerator is connected to the compressor, the compressor is connected to the condenser, the evaporator is connected to the condenser, the evaporator is connected to the compressor, and the evaporator is located in the cab for cooling the cab.

6. The vehicle chassis assembly of claim 5, wherein, The cooler has a first water inlet, a first water outlet, a second water inlet, and a second water outlet. The first water inlet is connected to the second end of the power battery, and the first water outlet is connected to the first end of the power battery. The second water inlet is connected to the liquid outlet of the condenser, the second water outlet is connected to the liquid inlet of the compressor, the air outlet of the compressor is connected to the air inlet of the condenser, the liquid inlet of the evaporator is connected to the liquid outlet of the condenser, and the air outlet of the evaporator is connected to the air inlet of the compressor. The cooling system also includes a first control valve and a second control valve. The first control valve has a first end, a second end and a third end. The first end is connected to the second pump inlet, the second end is connected to the second heat exchanger, and the third end is connected to the first end of the cab. The second control valve has a fourth end, a fifth end, and a sixth end. The fourth end is connected to the second heat exchanger, the fifth end is connected to the first water inlet end, and the sixth end is connected to the first end of the power battery.

7. The vehicle chassis assembly of claim 5, wherein, A fan is provided on the side of the first heat exchanger.

8. The vehicle chassis assembly of claim 6, wherein, The cooling system also includes a drive pump, the first end of which is connected to the first water outlet of the cooler, and the second end of which is connected to the second end of the power battery.

9. A vehicle characterized by comprising: Includes the vehicle chassis components as described in any one of claims 1-8.

Images