Liquid cooling circuit for a vehicle and vehicle

Abstract

The application provides a liquid cooling circuit of a vehicle and the vehicle, and relates to the technical field of vehicles.The liquid cooling circuit of the vehicle comprises a liquid cooling pipe group, the liquid cooling pipe group is used for conveying cooling liquid to dissipate heat of a generator and a motor on the vehicle; at least two radiators are communicated on the liquid cooling pipe group to dissipate heat of the cooling liquid through the radiators, at least one of the radiators is arranged on one side of a first radiator fan corresponding to an engine of the vehicle to dissipate heat of the radiator corresponding to the first radiator fan through the first radiator fan; and a second radiator fan is used for dissipating heat of the remaining radiators.The liquid cooling circuit of the vehicle and the vehicle provided by the application solve the problem of poor heat dissipation effect of the cooling liquid in the liquid cooling circuit in the prior art.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a liquid cooling circuit for a vehicle and the vehicle itself. Background Technology

[0002] Range-extended electric vehicles (REEVs) are hybrid vehicles that combine traditional engines with electric technology, demonstrating unique advantages in the field of long-haul heavy-duty transportation.

[0003] In related technologies, range-extended vehicles have a range extender and a power unit. The range extender includes an engine and a generator, which provides power to the generator to generate electricity and store it in a battery. The power unit is an electric motor used to drive the vehicle. Typically, the engine is mounted at the front of the range-extended vehicle and is equipped with a first cooling fan for cooling the engine. The generator and electric motor are mounted at the rear of the range-extended vehicle and are equipped with a liquid cooling circuit. Coolant flows through the liquid cooling circuit to cool the generator and electric motor. The liquid cooling circuit has a radiator and a second cooling fan, which cools the radiator and, consequently, the coolant.

[0004] However, when both the range extender and the powertrain are operating, the engine, generator, and electric motor are all located in the same engine compartment of the range-extended vehicle, and air intake is typically only at the front of the vehicle. This means that the airflow from the second fan to the radiator is already cooled by the first fan, which can easily cause the airflow itself to carry some heat. Consequently, the cooling effect on the radiator is poor, reducing the cooling efficiency of the coolant in the liquid cooling circuit. Utility Model Content

[0005] This application provides a liquid cooling circuit for a vehicle and a vehicle in order to solve the problem of poor heat dissipation effect of the coolant in the liquid cooling circuit in the prior art.

[0006] In a first aspect, embodiments of this application provide a liquid cooling circuit for a vehicle, comprising:

[0007] Liquid cooling pipe assembly, which is used to deliver coolant to dissipate heat from the generator and electric motor on the vehicle;

[0008] At least two radiators are connected to the liquid cooling pipe assembly so that the coolant is cooled by the radiators, and at least one of the radiators is disposed on one side of the first cooling fan of the engine of the vehicle so that the first cooling fan can cool the radiator corresponding to the first cooling fan.

[0009] A second cooling fan is used to dissipate heat from the remaining heat sinks.

[0010] In one possible implementation, a drive pump assembly is also included, which is disposed on the liquid cooling pipe assembly and is used to drive the coolant to circulate within the liquid cooling pipe assembly.

[0011] In one possible implementation, at least two of the heat sinks include a first heat sink and a second heat sink;

[0012] The first heat sink is disposed on one side of the first cooling fan so that the first cooling fan can dissipate heat from the first heat sink.

[0013] The second heat sink is disposed on one side of the second cooling fan so that the second cooling fan can dissipate heat from the second heat sink.

[0014] In one possible implementation, the liquid cooling pipe assembly includes a first pipe and a second pipe that are interconnected, the first pipe being used to dissipate heat from the generator and the second pipe being used to dissipate heat from the motor.

[0015] The first radiator is connected to the first pipe, and the second radiator is connected to the second pipe.

[0016] In one possible implementation, the second pipeline includes a main pipe connected to the first pipeline and a first branch pipe and a second branch pipe connected to the main pipe;

[0017] The first branch pipe is used to dissipate heat from the electric motor and the electric motor controller on the vehicle, and the second branch pipe is used to dissipate heat from the main and auxiliary drive integrated controller on the vehicle.

[0018] The second radiator is connected to the main pipe.

[0019] In one possible implementation, the drive pump assembly includes a first drive pump and a second drive pump, with the first drive pump correspondingly disposed on the first pipeline and the second drive pump correspondingly disposed on the second pipeline.

[0020] In one possible implementation, an expansion container is also included, which is connected to the liquid cooling pipe assembly.

[0021] In one possible implementation, a temperature sensing element is also included, which is disposed on the liquid cooling pipe assembly and is used to detect the temperature of the coolant.

[0022] Secondly, embodiments of this application provide a vehicle, including: a vehicle body and a liquid cooling circuit of the vehicle as described in any of the above embodiments disposed on the vehicle body.

[0023] In one possible implementation, an engine and a first cooling fan for cooling the engine are provided at the front end of the vehicle body, and a generator and an electric motor are provided at the rear end of the vehicle body.

[0024] The liquid cooling circuit of the vehicle includes a liquid cooling pipe assembly, at least two radiators, and a second cooling fan, which are mounted on the vehicle body. The liquid cooling pipe assembly is connected to the generator and the motor.

[0025] At least one of the radiators is disposed at the front end of the vehicle body and located on one side of the first cooling fan;

[0026] The second cooling fan and the remaining radiators are located at the rear end of the vehicle body.

[0027] This application provides a liquid cooling circuit and vehicle for a vehicle. The liquid cooling circuit includes: a liquid cooling pipe assembly for transporting coolant to dissipate heat from the generator and motor in the vehicle; at least two radiators connected to the liquid cooling pipe assembly to dissipate coolant through the radiators; at least one radiator positioned on one side of a first cooling fan of the vehicle's engine to dissipate heat from the radiator corresponding to the first cooling fan; and a second cooling fan for dissipating heat from the remaining radiators. When both the range extender and the powertrain are operating, the liquid cooling pipe assembly can dissipate heat from the generator and motor through the coolant. Furthermore, the first cooling fan dissipates heat from the engine while simultaneously dissipating heat from a portion of the radiators, and the second cooling fan dissipates heat from another portion of the radiators. This allows multiple radiators to simultaneously dissipate heat from the coolant in the liquid cooling pipe assembly, thereby improving the heat dissipation effect of the coolant in the liquid cooling circuit and solving the problem of poor heat dissipation in existing liquid cooling circuits. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0029] Figure 1 This is a schematic diagram of the engine cooling system in a range-extended vehicle in the prior art;

[0030] Figure 2 A schematic diagram of a liquid cooling circuit for a vehicle provided in this application embodiment;

[0031] Figure 3 for Figure 2 A schematic diagram of the installation structure of the first radiator on the engine cooling system.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10-Engine cooling system; 11-Condenser electric fan; 12-Condenser; 13-Intercooler; 14-High-temperature radiator; 15-Fan shroud;

[0034] 20 - First cooling fan;

[0035] 30 - Generator;

[0036] 40 - Electric motor;

[0037] 50 - Motor controller;

[0038] 60-Integrated controller for main and auxiliary drives;

[0039] 100 - Liquid cooling pipe assembly; 110 - First pipe; 120 - Second pipe; 121 - First branch pipe; 122 - Second branch pipe; 123 - Main pipe;

[0040] 200 - Second cooling fan;

[0041] 300 - Radiator; 310 - First radiator; 320 - Second radiator;

[0042] 400 - Drive pump set; 410 - First drive pump; 420 - Second drive pump;

[0043] 500 - Expansion Container;

[0044] 600 - Temperature sensing element;

[0045] 700 - Connecting pipe.

[0046] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0047] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates 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.

[0048] The application background of this application is explained as follows:

[0049] With the urgent global need to reduce carbon emissions and transition to a new energy model, range-extended electric vehicles (REEVs), as hybrid vehicles combining traditional internal combustion engines and electric technology, have demonstrated unique advantages in the long-haul, heavy-duty transportation sector. A REEV consists of a range extender and a powertrain. The range extender includes an engine and a generator, which power the generator to produce electricity and store it in a battery. The powertrain is an electric motor used to drive the vehicle.

[0050] Typically, the engine is mounted at the front of the range-extended vehicle, and a corresponding engine cooling system 10 is provided. For example... Figure 1 As shown, the engine cooling system 10 includes a condenser electric fan 11, a condenser 12, an intercooler 13, a high-temperature radiator 14, a fan shroud 15, and a first cooling fan 20 arranged sequentially. The first cooling fan 20 can be an electronically controlled silicone oil clutch fan. By controlling the operation of the first cooling fan 20, air is blown across the high-temperature radiator 14, enhancing the heat exchange efficiency of the high-temperature radiator 14. The high-temperature radiator 14 transfers heat from the coolant to the flowing air through its internal pipes and fins, thereby reducing the temperature of the coolant. The cooled coolant is then circulated back to the engine, carrying away more heat and ensuring that the engine operates within its optimal temperature range.

[0051] The generator and electric motor are installed at the rear of the range-extended vehicle and are equipped with a corresponding liquid cooling circuit. Coolant flows through the liquid cooling circuit to dissipate heat from the generator and electric motor. The liquid cooling circuit includes a radiator and a second cooling fan. The second cooling fan dissipates heat from the radiator, which in turn dissipates heat from the coolant. Simultaneously, the liquid cooling circuit also dissipates heat from the electric motor controller and the main / auxiliary drive integrated controller.

[0052] When both the range extender and the powertrain are operating, the engine, generator, and electric motor are all located in the same engine compartment of the range-extended vehicle, and air typically enters only from the front of the vehicle. This means the airflow from the second fan to the radiator is already cooled by the first fan, which can easily cause the airflow itself to carry some heat. Consequently, the cooling effect on the radiator is poor, and consequently, the cooling effect on the coolant in the liquid cooling circuit is also poor.

[0053] Based on this, this application provides a liquid cooling circuit for a vehicle and a vehicle in general. The liquid cooling circuit includes: a liquid cooling pipe assembly for transporting coolant to dissipate heat from the generator and motor in the vehicle; at least two radiators connected to the liquid cooling pipe assembly to dissipate coolant through the radiators; at least one radiator is positioned on one side of a first cooling fan of the vehicle's engine to dissipate heat from the radiator corresponding to the first cooling fan; and a second cooling fan for dissipating heat from the remaining radiators. When both the range extender and the power unit are operating, the liquid cooling pipe assembly can dissipate heat from the generator and motor through the coolant. Furthermore, while the first cooling fan dissipates heat from the engine, it can also dissipate heat from a portion of the radiators, and the second cooling fan can dissipate heat from another portion of the radiators. Thus, multiple radiators simultaneously dissipate heat from the coolant in the liquid cooling pipe assembly, thereby improving the heat dissipation effect of the coolant in the liquid cooling circuit and solving the problem of poor heat dissipation in the liquid cooling circuit of the prior art.

[0054] The technical solution of this application and how it solves the above-mentioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0055] like Figure 2 and Figure 3 As shown in the embodiment of this application, a liquid cooling circuit for a vehicle includes:

[0056] Liquid cooling pipe assembly 100 is used to transport coolant to dissipate heat from the generator 30 and motor 40 on the vehicle.

[0057] At least two radiators 300 are connected to the liquid cooling pipe assembly 100 so that the coolant can be dissipated through the radiator 300. At least one radiator 300 is used to be disposed on one side of the first cooling fan 20 of the vehicle's engine so that the first cooling fan 20 can dissipate heat to the radiator 300 corresponding to the first cooling fan 20.

[0058] The second cooling fan 200 is used to dissipate heat from the remaining heat sinks 300.

[0059] It should be noted that the range-extended vehicle has a range extender and a power unit. The range extender includes an engine and a generator 30, which provides power to the generator 30 through the engine, so that the generator 30 generates electricity and stores the electrical energy in the battery; the power unit is an electric motor 40, which is used to drive the vehicle.

[0060] Typically, the engine and the first cooling fan 20 are located at the front of the vehicle to cool the engine. The generator 30 and the electric motor 40 are located at the rear of the vehicle, and the second cooling fan 200 is also located at the rear of the vehicle.

[0061] For this purpose, coolant flows through the liquid cooling pipe assembly 100. The coolant can be water or a mixture of water and antifreeze, and there are no restrictions on this. For example, it can be ethylene glycol-based coolant, propylene glycol-based coolant, etc. Part of the liquid cooling pipe assembly 100 is located at the rear of the vehicle and is connected to the generator 30 and the electric motor 40; another part is located at the front of the vehicle and is connected to the engine.

[0062] In practice, the connection between the liquid cooling pipe assembly 100 and the engine, generator 30 and motor 40 can be either that the liquid cooling pipe assembly 100 is in direct contact with the engine, generator 30 and motor 40, or that each of the engine, generator 30 and motor 40 has a flow channel for the flow of coolant, in which case the liquid cooling pipe assembly 100 is connected to the corresponding flow channel.

[0063] At least one radiator 300 on the liquid cooling pipe assembly 100 is located at the front end of the vehicle and is positioned to one side of the first cooling fan 20, so that the first cooling fan 20 can dissipate heat from the radiator 300. The remaining radiators 300 on the liquid cooling pipe assembly 100 are located at the rear end of the vehicle and are positioned to one side of the second cooling fan 200, so that the second cooling fan 200 can dissipate heat from the radiator 300.

[0064] When both the range extender and the power unit are operating, the liquid cooling pipe assembly 100 can dissipate heat from the generator 30 and the electric motor 40 through the coolant. Secondly, the first cooling fan 20, while cooling the engine, can also cool a portion of the radiators 300; the second cooling fan 200 can cool another portion of the radiators 300. Thus, multiple radiators 300 simultaneously dissipate heat from the coolant within the liquid cooling pipe assembly 100, thereby improving the heat dissipation effect of the coolant in the liquid cooling circuit and solving the problem of poor coolant heat dissipation in existing liquid cooling circuits.

[0065] In other words, it can effectively utilize the frontal airflow of the vehicle, appropriately reduce the operation of the second cooling fan 200 at the rear of the vehicle, and reduce noise. At the same time, it is conducive to realizing a platform-based cooling design for range-extended vehicles, and it is not easy to require additional changes to the cooling design of the generator 30 or the electric motor 40 due to changes in the power of the range extender. That is, the overall vehicle layout does not need to be changed to match different range extenders, and the design is uniform.

[0066] It should be noted that the radiator 300 can be an existing radiator product, and its structure is not limited. For example, the radiator 300 may include a heat dissipation coil with good thermal conductivity and heat dissipation fins; the heat dissipation coil can also be replaced by a water tank. During installation, the heat dissipation coil is connected to the liquid cooling pipe assembly 100 so that coolant can pass through the heat dissipation coil and transfer heat outward through the heat dissipation coil and heat dissipation fins. Then, the first cooling fan 20 or the second cooling fan 200 can blow airflow onto the heat dissipation coil and heat dissipation fins, thereby carrying away the heat from the coolant.

[0067] Furthermore, there are no restrictions on the model of the first cooling fan 20 and the second cooling fan 200.

[0068] like Figure 2 As shown, in some embodiments, the vehicle's liquid cooling circuit also includes a drive pump assembly 400, which is disposed on the liquid cooling pipe assembly 100 and is used to drive the coolant to circulate within the liquid cooling pipe assembly 100.

[0069] During operation, the drive pump assembly 400 drives the coolant to circulate within the liquid cooling pipe assembly 100. During this process, the coolant carries away the heat from the generator 30 and the motor 40, and the radiators 300 then dissipate the heat from the coolant, thereby achieving the purpose of cooling the generator 30 and the motor 40.

[0070] In other embodiments, the vehicle's liquid cooling circuit may further include a liquid storage container. The shape and location of the liquid storage container are not limited, as long as it can store coolant. The liquid cooling pipe assembly 100 has an inlet end and an outlet end, both of which are connected to the liquid storage container. The drive pump assembly 400 drives the coolant to circulate between the liquid storage container and the liquid cooling pipe assembly 100. That is, the drive pump assembly 400 can pump the coolant from the liquid storage container into the liquid cooling pipe assembly 100, and the coolant flows back into the liquid storage container after flowing along the liquid cooling pipe assembly 100.

[0071] In practice, the drive pump assembly 400 can be a number of electric water pumps, pipeline pumps, reciprocating pumps, centrifugal pumps, or other types of pumps, without limitation. The drive pump assembly 400 and the radiator 300 can be connected to the liquid cooling pipe assembly 100 by screwing, welding, or other means. The liquid cooling pipe assembly 100 can be connected to the liquid storage container by welding, screwing, or other means, so that the interior of the liquid storage container is in communication with the interior of the liquid cooling pipe assembly 100.

[0072] like Figure 2 and Figure 3 As shown, in some embodiments, at least two heat sinks 300 include a first heat sink 310 and a second heat sink 320;

[0073] The first heat sink 310 is disposed on one side of the first cooling fan 20 so that the first cooling fan 20 can dissipate heat from the first heat sink 310.

[0074] The second heat sink 320 is disposed on one side of the second cooling fan 200 so that the second cooling fan 200 can dissipate heat from the second heat sink 320.

[0075] It should be noted that the first radiator 310 is located at the front of the vehicle and is positioned to one side of the first cooling fan 20, that is, the first radiator 310 is located at the air outlet of the first cooling fan 20. The second radiator 320 is located at the rear of the vehicle and is positioned to one side of the second cooling fan 200, that is, the second radiator 320 is located at the air outlet of the second cooling fan 200.

[0076] When both the range extender and the power unit are working, the first cooling fan 20 cools the engine and the first radiator 310 at the same time; the second cooling fan 200 cools the second radiator 320, thereby effectively improving the cooling effect of the coolant in the liquid cooling circuit.

[0077] like Figure 2 As shown, the liquid cooling pipe assembly 100 further includes a first pipe 110 and a second pipe 120 that are interconnected. The first pipe 110 is used to dissipate heat from the generator 30, and the second pipe 120 is used to dissipate heat from the motor 40.

[0078] The first radiator 310 is connected to the first pipe 110, and the second radiator 320 is connected to the second pipe 120.

[0079] This allows the first pipe 110 and the second pipe 120 to form two independent liquid cooling paths, respectively.

[0080] Furthermore, the first pipe 110 is connected to the generator 30 to dissipate heat from the generator 30; the second pipe 120 is connected to the motor 40 to dissipate heat from the motor 40.

[0081] The first radiator 310 is connected to the first pipe 110, and the second radiator 320 is connected to the second pipe 120. Thus, the first radiator 310 or the second radiator 320 can be used to dissipate heat from the coolant in the corresponding first pipe 110 or second pipe 120.

[0082] Therefore, depending on the actual heat dissipation needs (i.e., whether to dissipate heat from the generator 30 or the motor 40), either the first pipe 110 or the second pipe 120 can be operated, thereby selecting to activate the corresponding first radiator 310 or second radiator 320. Of course, the first pipe 110 and the second pipe 120 can also be operated simultaneously, in which case the first radiator 310 and the second radiator 320 are activated at the same time. This effectively enriches the selectivity in actual use.

[0083] In other embodiments, when a liquid storage container is provided, both the first pipe 110 and the second pipe 120 have an inlet end and an outlet end, and both inlet and outlet ends are connected to the liquid storage container. In this case, a main outlet pipe and a main return pipe can be provided on the liquid storage container, and the inlet and outlet ends of the first pipe 110 and the second pipe 120 are respectively connected to the main outlet pipe and the main return pipe. In other embodiments, the first pipe 110 and the second pipe 120 can also be directly connected to the liquid storage container.

[0084] like Figure 2 As shown, the corresponding drive pump assembly 400 includes a first drive pump 410 and a second drive pump 420. The first drive pump 410 is correspondingly disposed on the first pipeline 110, and the second drive pump 420 is correspondingly disposed on the second pipeline 120.

[0085] Therefore, the coolant flow in the corresponding first pipe 110 or second pipe 120 can be driven individually by the first drive pump 410 or the second drive pump 420, thus controlling the operation of the corresponding first pipe 110 or second pipe 120. It is understandable that in actual use, the first drive pump 410 or the second drive pump 420 can be selected to operate according to the actual heat dissipation requirements, thereby selecting the operation of the first pipe 110 or the second pipe 120.

[0086] In other embodiments, the number of drive pumps in the drive pump group 400 may be set to other quantities. For example, the same drive pump may be shared at the front end of the first pipeline 110 and the second pipeline 120. In this case, some valves may be added appropriately to control the opening and closing of the first pipeline 110 or the second pipeline 120.

[0087] Therefore, when the vehicle is in a stationary power generation state (i.e., the engine and generator 30 are working, but the electric motor 40 is not working), the engine cooling system 10 and the first drive pump 410 are activated, causing the first cooling fan 20 and the first pipe 110 to work. During this time, the first cooling fan 20 can cool the engine and the first radiator 310 simultaneously, eliminating the need to activate the second cooling fan 200 to achieve the purpose of cooling the engine and generator 30. Compared to the prior art, where the first cooling fan 20 needs to be activated to cool the engine and the second cooling fan 200 to cool the generator 30 when the vehicle is in a stationary power generation state, this effectively reduces the energy consumption of the second cooling fan 200, achieving the effects of reducing energy consumption and avoiding noise generation from the second cooling fan 200.

[0088] like Figure 2 As shown, in some embodiments, the second pipeline 120 includes a main pipe 123 connected to the first pipeline 110 and a first branch pipe 121 and a second branch pipe 122 connected to the main pipe 123.

[0089] The first branch pipe 121 is used to dissipate heat from the electric motor 40 and the electric motor controller 50 on the vehicle, and the second branch pipe 122 is used to dissipate heat from the main and auxiliary drive integrated controller 60 on the vehicle.

[0090] The second radiator 320 is connected to the main pipe 123.

[0091] In other words, during implementation, the second pipe 120 can be further divided into a first branch pipe 121 and a second branch pipe 122. The first branch pipe 121 connects to the electric motor 40 and the electric motor controller 50, so as to dissipate heat from the electric motor 40 and the electric motor controller 50 through the coolant in the first branch pipe 121. The second branch pipe 122 connects to the main and auxiliary drive integrated controller 60 on the vehicle, so as to dissipate heat from the main and auxiliary drive integrated controller 60 through the coolant in the second branch pipe 122.

[0092] In addition, the second radiator 320 is connected to the main pipe 123 so that the coolant passing through the first branch pipe 121 and the second branch pipe 122 can be dissipated through the second radiator 320 as a whole.

[0093] It should be noted that the engine cooling system 10, engine, generator 30, electric motor 40, electric motor controller 50 and main and auxiliary drive integrated controller 60 mentioned in this embodiment are all components on existing vehicles, and the structure of these components is not limited in this embodiment.

[0094] like Figure 2 As shown, in some embodiments, the vehicle's liquid cooling circuit also includes an expansion container 500, which is connected to the liquid cooling pipe assembly 100.

[0095] The expansion container 500 can be an expansion jug, a bottle, a can, or other container, without limitation. The expansion container 500 can be connected to the liquid cooling pipe assembly 100 by screwing, welding, or other means, or it can be connected to the liquid storage container.

[0096] During the operation of the liquid cooling circuit, the coolant is prone to expansion when heated. The expansion container 500 provides additional space for the coolant, ensuring better flow of the coolant in the liquid cooling circuit.

[0097] like Figure 2 As shown, in some embodiments, the vehicle's liquid cooling circuit also includes a temperature detection element 600, which is disposed on the liquid cooling pipe assembly 100 and is used to detect the temperature of the coolant.

[0098] The temperature sensing element 600 can be a temperature sensor, or other types of thermometers, temperature measuring instruments, etc., and there are no restrictions on the model. The temperature sensing element 600 is used to detect the temperature of the coolant, thereby facilitating the assessment of the coolant's heat dissipation.

[0099] Specifically, along the flow direction of the coolant, the temperature sensor 600 can be installed at the front end of the liquid cooling pipe assembly 100 of the generator 30 and the motor 40 to detect the temperature of the coolant flowing through the generator 30 or the motor 40.

[0100] In practice, a connecting pipe 700 can be added to the front end of the liquid cooling pipe assembly 100 corresponding to the generator 30 and the motor 40 in the direction of coolant flow. At this time, the inlet and outlet ends of the first pipe 110 are respectively connected to the two ends of the connecting pipe 700, the inlet and outlet ends of the second pipe 120 are respectively connected to the two ends of the connecting pipe 700, and the temperature detection element 600 is installed on the connecting pipe 700.

[0101] Based on this, during implementation, the expansion container 500 can also be equipped with an inlet end and an outlet end. The inlet end of the expansion container 500 is connected to the main pipe 123 of the second pipeline 120, and the outlet end of the expansion container 500 is connected to the connecting pipe 700.

[0102] In other embodiments, when a liquid storage container is provided, the temperature detection element 600 can also be correspondingly installed at the liquid inlet end of the liquid storage container to detect the temperature of the coolant entering the liquid storage container. Of course, the temperature detection element 600 can also be installed at other locations in the liquid cooling pipe assembly 100, and there are no restrictions on this.

[0103] In general, when the vehicle is in the first operating mode (stationary power generation), the engine and generator 30 operate, while the electric motor 40 does not. The engine management system (EMS) receives requests from the vehicle management system (PMS), and the EMS controls the first cooling fan 20 to operate. The airflow passes through the first radiator 310 and the high-temperature radiator 14 to cool both. The first cooling fan 20 then cools the engine, and the first pipe 110 cools the generator 30.

[0104] When the vehicle is in the second operating mode (hybrid mode), the engine, generator 30, and electric motor 40 operate simultaneously. The first cooling fan 20 operates, and secondly, depending on actual cooling needs, the first radiator 310 is prioritized for cooling the coolant in the liquid cooling circuit, while the second radiator 320 and the second cooling fan 200 simultaneously cool the coolant in the liquid cooling circuit. Therefore, the operation of the second cooling fan 200 can be reduced according to cooling requirements, thereby reducing energy consumption and noise.

[0105] When the vehicle is in the third operating mode (pure electric mode), the engine and generator 30 are not working, while the electric motor 40 is working. The PMS controls the second drive pump 420 to operate according to a certain duty cycle based on the body temperature parameters of the electric motor controller 50, the electric motor 40, and the main and auxiliary drive integrated controller 60, while simultaneously controlling the second cooling fan 200 to operate for heat dissipation.

[0106] Furthermore, when the motor 40 is operating, the PMS receives temperature parameters from the motor controller 50, the motor 40, and the main / auxiliary drive integrated controller 60. It can also first control the second drive pump 420 to operate at a certain duty cycle, activating the second radiator 320 and the second cooling fan 200. If the temperature detection value of the temperature sensor 600 is higher than a certain set value, the PMS controls the first drive pump 410 to operate, activating the first radiator 310 to assist in cooling the coolant, thereby reducing the overall coolant temperature of the liquid cooling circuit and improving the coolant's cooling efficiency.

[0107] In summary, in the liquid cooling circuit of the vehicle provided in this application embodiment, when the range extender and power components are all working, the liquid cooling pipe assembly 100 can dissipate heat from the generator 30 and the motor 40 through the coolant. Secondly, the first cooling fan 20 can dissipate heat from the engine while also dissipating heat from a portion of the radiators 300; the second cooling fan 200 can dissipate heat from another portion of the radiators 300. Thus, multiple radiators 300 simultaneously dissipate heat from the coolant within the liquid cooling pipe assembly 100, thereby improving the heat dissipation effect of the coolant in the liquid cooling circuit and solving the problem of poor heat dissipation in the liquid cooling circuit of the prior art.

[0108] The present application provides a vehicle, such as a range-extended heavy truck or a range-extended sedan, which includes: a vehicle body and a liquid cooling circuit of the vehicle in any of the above embodiments disposed on the vehicle body.

[0109] Specifically, the front end of the vehicle body is equipped with an engine and a first cooling fan 20 for cooling the engine, and the rear end of the vehicle body is equipped with a generator 30 and an electric motor 40.

[0110] The liquid cooling pipe assembly 100, at least two radiators 300 and a second cooling fan 200 in the liquid cooling circuit of the vehicle are installed on the vehicle body. The liquid cooling pipe assembly 100 is connected to the generator 30 and the motor 40.

[0111] At least one radiator 300 is disposed at the front end of the vehicle body and is located on one side of the first cooling fan 20;

[0112] The second cooling fan 200 and the remaining radiators 300 are located at the rear of the vehicle body.

[0113] The liquid cooling circuit of the vehicle has been described in detail in the above embodiments and will not be repeated here.

[0114] It should be noted that the vehicle body includes a range extender and a power unit. The range extender includes an engine and a generator 30, which provides power to the generator 30 through the engine, enabling the generator 30 to generate electricity and store electrical energy in the battery. The power unit is an electric motor 40, which is used to drive the vehicle body.

[0115] Therefore, when both the range extender and the power unit are operating, the liquid cooling pipe assembly 100 can dissipate heat from the generator 30 and the motor 40 through the coolant. Secondly, the first cooling fan 20, while dissipating heat from the engine, can also dissipate heat from a portion of the radiators 300; the second cooling fan 200 can dissipate heat from another portion of the radiators 300. Thus, by having multiple radiators 300 simultaneously dissipate heat from the coolant within the liquid cooling pipe assembly 100, the heat dissipation effect of the coolant in the liquid cooling circuit is improved, solving the problem of poor heat dissipation effect of the coolant in the liquid cooling circuit in the prior art.

[0116] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0117] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A liquid cooling circuit for a vehicle, characterized in that, include: Liquid cooling pipe assembly (100) for delivering coolant to dissipate heat from the generator (30) and motor (40) on the vehicle; At least two radiators (300) are connected to the liquid cooling pipe assembly (100) so that the coolant is cooled by the radiator (300), and at least one of the radiators (300) is configured to be disposed on one side of the first cooling fan (20) of the engine of the vehicle so that the first cooling fan (20) can cool the radiator (300) corresponding to the first cooling fan (20). The second cooling fan (200) is used to dissipate heat from the remaining heat sinks (300).

2. The liquid cooling circuit of the vehicle according to claim 1, characterized in that, It also includes a drive pump assembly (400) disposed on the liquid cooling pipe assembly (100), the drive pump assembly (400) being used to drive the coolant to circulate within the liquid cooling pipe assembly (100).

3. The liquid cooling circuit of the vehicle according to claim 2, characterized in that, At least two of the said radiators (300) include a first radiator (310) and a second radiator (320); The first heat sink (310) is disposed on one side of the first cooling fan (20) to dissipate heat from the first heat sink (310) through the first cooling fan (20); The second heat sink (320) is disposed on one side of the second cooling fan (200) so that the second cooling fan (200) can dissipate heat from the second heat sink (320).

4. The liquid cooling circuit of the vehicle according to claim 3, characterized in that, The liquid cooling pipe assembly (100) includes a first pipe (110) and a second pipe (120) connected to each other. The first pipe (110) is used to dissipate heat from the generator (30), and the second pipe (120) is used to dissipate heat from the motor (40). The first radiator (310) is connected to the first pipe (110), and the second radiator (320) is connected to the second pipe (120).

5. The liquid cooling circuit of the vehicle according to claim 4, characterized in that, The second pipeline (120) includes a main pipe (123) connected to the first pipeline (110) and a first branch pipe (121) and a second branch pipe (122) connected to the main pipe (123). The first branch pipe (121) is used to dissipate heat from the electric motor (40) and the electric motor controller (50) on the vehicle, and the second branch pipe (122) is used to dissipate heat from the main and auxiliary drive integrated controller (60) on the vehicle. The second radiator (320) is connected to the main pipe (123).

6. The liquid cooling circuit of the vehicle according to claim 4, characterized in that, The drive pump assembly (400) includes a first drive pump (410) and a second drive pump (420). The first drive pump (410) is correspondingly disposed on the first pipeline (110), and the second drive pump (420) is correspondingly disposed on the second pipeline (120).

7. The liquid cooling circuit of the vehicle according to any one of claims 2-5, characterized in that, It also includes an expansion container (500) connected to the liquid cooling pipe assembly (100).

8. The liquid cooling circuit of the vehicle according to any one of claims 2-5, characterized in that, It also includes a temperature detection element (600), which is disposed on the liquid cooling pipe assembly (100) and is used to detect the temperature of the coolant.

9. A vehicle, characterized in that, include: The vehicle body and the liquid cooling circuit of any one of claims 1-8 disposed on the vehicle body.

10. The vehicle according to claim 9, characterized in that, The front end of the vehicle body is provided with an engine and a first cooling fan (20) for cooling the engine, and the rear end of the vehicle body is provided with a generator (30) and an electric motor (40). The liquid cooling pipe assembly (100), at least two radiators (300) and a second cooling fan (200) in the liquid cooling circuit of the vehicle are installed on the vehicle body. The liquid cooling pipe assembly (100) is connected to the generator (30) and the motor (40). At least one of the radiators (300) is disposed at the front end of the vehicle body and is located on one side of the first cooling fan (16); The second cooling fan (200) and the remaining radiators (300) are located at the rear end of the vehicle body.

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