Heat dissipation system and method for extended-range passenger car

Abstract

The invention relates to the technical field of vehicle control, in particular to a heat dissipation device of an extended-range passenger car, a first cooling loop comprises a driving motor controller, a generator controller and a heat dissipation element of an integrated power supply which are connected in series through a pipeline, one end of the pipeline is connected with an outlet of a water pump, and the other end of the pipeline is connected with an inlet of an ATS radiator; the second cooling loop comprises a driving motor and a radiating element of the generator which are connected in series through a pipeline, one end of the pipeline is connected with an outlet of the water pump, and the other end is connected with an inlet of the ATS radiator; the engine cooling loop comprises an engine cooling cylinder sleeve, the engine cooling cylinder sleeve is connected with an inlet of the ATS radiator through a pipeline, and an outlet of the ATS radiator is connected with the engine cooling cylinder sleeve through a pipeline. The three paths of circulation share one group of radiator and water pump, so that the energy can be saved to the maximum extent while the stable and reliable operation of each important part of the whole vehicle is ensured.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a heat dissipation system and method for an extended-range passenger car. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] An extended-range bus is a type of bus that has a generator added to a pure electric vehicle. When the battery is fully charged, the battery is used as a power source to drive the bus. When the battery is insufficient, the engine in the car will automatically start, and the engine that consumes fuel drives the generator to charge the battery, thereby ensuring that the vehicle can continue to drive. This method can ensure that the battery of the bus is always working in the best condition, and because the engine is used to generate electricity instead of directly driving the bus, the amount of exhaust gas emitted by the engine is relatively small. Therefore, the extended-range bus combines the advantages of both electric vehicles and fuel vehicles. It has the quietness and speed of electric vehicles, and can obtain power by refueling at gas stations in places where there are no charging stations.

[0004] Extended-range buses can be used in areas where charging facilities cannot be installed on a large scale due to limited power facilities and pure electric models are difficult to promote. However, since extended-range buses take into account the advantages of both pure electric vehicles and traditional vehicles, there are many parts of the vehicle, especially many important parts with heat dissipation requirements. The existing technology often connects the heat dissipation pipes of multiple parts in series and uses multi-way valves to achieve a balance between the heat dissipation requirements of different parts. It is difficult to ensure the stable and reliable operation of the important parts of the vehicle, and it consumes more energy. Summary of the invention

[0005] In order to solve the technical problems existing in the above-mentioned background technology, the present invention provides a heat dissipation system and method for an extended-range passenger bus, which determines the heat dissipation demand and coolant flow demand of each component according to the actual operating state of the vehicle, and uses the drive motor controller, generator controller and integrated power supply as one cooling cycle, the drive motor and generator as another cooling cycle, and the engine adopts a separate cooling cycle. The three cycles share a group of radiators and water pumps, which can save energy to the maximum extent while ensuring the smooth and reliable operation of all important components of the whole vehicle.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A first aspect of the present invention provides a heat dissipation system for an extended-range bus, comprising:

[0008] A first cooling circuit includes a drive motor controller, a generator controller and a heat dissipation element of an integrated power supply connected in series through a pipeline, one end of the pipeline is connected to the outlet of the water pump, and the other end of the pipeline is connected to the inlet of the ATS radiator;

[0009] A second cooling circuit includes heat dissipation elements of the drive motor and the generator connected in series through a pipeline, one end of the pipeline is connected to the outlet of the water pump, and the other end of the pipeline is connected to the inlet of the ATS radiator;

[0010] The engine cooling circuit includes an engine cooling cylinder liner, the engine cooling cylinder liner is connected to the inlet of the ATS radiator through a pipeline, and the outlet of the ATS radiator is connected to the engine cooling cylinder liner through a pipeline.

[0011] Furthermore, the inlet of the water pump is connected to the first outlet of the expansion water tank through a pipeline.

[0012] Furthermore, the second outlet of the expansion water tank is connected to the engine cooling cylinder liner through a pipeline.

[0013] Furthermore, the ATS radiator includes at least an engine cooling module and a high-voltage component cooling module. The engine cooling module is used to transfer heat from the engine to the external environment through a fan and a radiator, and the high-voltage component cooling module is used to exchange heat from the drive motor, generator, drive motor controller, generator controller and integrated power supply with air through a fan and a radiator.

[0014] Furthermore, after the coolant is pressurized by the water pump, it is divided into two paths at one of the outlets of the expansion tank. The first cooling circuit passes through the drive motor controller, the generator controller and the integrated power supply in sequence, and the second cooling circuit passes through the drive motor and the generator in sequence. The two coolant paths meet in front of the ATS radiator and enter the high-voltage component cooling module in the ATS radiator together.

[0015] Furthermore, when the engine is running to generate electricity, the coolant cools the engine through the engine cooling circuit, and the heat of the coolant exchanges heat with the air through the engine cooling module in the ATS radiator.

[0016] Furthermore, when the high-voltage component is running, when at least one group of the drive motor temperature, the generator temperature, the drive motor controller temperature, the generator controller temperature and the integrated power supply temperature exceeds the corresponding second set value, the fan in the high-voltage component heat dissipation module starts to operate; when it exceeds the corresponding third set value, the fan in the high-voltage component heat dissipation module operates at full speed; when it does not exceed the corresponding first set value, the fan in the high-voltage component heat dissipation module stops operating.

[0017] Furthermore, when the engine is running to generate electricity, when the engine coolant temperature or the engine intake temperature exceeds the corresponding fifth set value, the fan in the engine cooling module starts to operate; when it exceeds the corresponding sixth set value, the fan in the engine cooling module operates at full speed; when it does not exceed the corresponding fourth set value, the fan in the engine cooling module stops operating.

[0018] Furthermore, a vehicle controller is provided for obtaining the temperatures of the engine, drive motor, generator, engine, drive motor controller, generator controller and integrated power supply, and controlling the fan speed of each cooling module in the ATS radiator according to the set temperature control strategy.

[0019] A second aspect of the present invention provides a heat dissipation method for an extended-range bus, comprising the following steps:

[0020] The coolant is pressurized by a water pump from one of the outlets of the expansion tank and then passes through the first cooling circuit and the second cooling circuit respectively to cool the drive motor controller, generator controller and integrated power supply, as well as the drive motor and generator. The two coolants pass through the high-voltage component cooling module in the ATS radiator to exchange heat with the air.

[0021] When the engine is running to generate electricity, the coolant cools the engine through the engine cooling circuit, and the coolant heat exchanges with the air through the engine cooling module in the ATS radiator.

[0022] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0023] 1. According to the coolant flow requirements of the components with heat dissipation requirements in the extended-range bus, after performance comparison and analysis, the drive motor controller, generator controller and integrated power supply are connected in series to form the first cooling cycle, the drive motor and generator pipelines are connected in series to form the second cooling cycle, and the engine cooling circuit is a separate one. When the bus is in pure electric mode, the generator and engine are not working, then the second cooling cycle only bears the heat generated by the drive motor. Since the first cooling cycle is designed for electronic devices with relatively smaller heat generation, the heat dissipation module of the high-voltage components in the ATS radiator can meet the heat demand; when the vehicle is in extended-range operation, the engine and generator are put into operation, and the heat generated by the engine is cooled by a separate heat dissipation circuit. Although the heat load brought by the generator is increased in the first cooling cycle, the high-voltage component heat dissipation module in the water pump and the ATS radiator can respond to the heat dissipation demand by increasing the flow rate and fan speed, which can not only solve the heat dissipation requirements of the extended-range bus and ensure the reliable and safe operation of the whole vehicle, but also meet the energy saving and noise requirements to the maximum extent.

[0024] 2. When the parallel cooling circuit is adopted, the layout of the pipeline is relatively simplified, and one water pump can meet the circulation of the coolant, which is beneficial to the integrated structure of the ATS radiator and indirectly helps to reduce the space occupied by components in the bus. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 It is a schematic diagram of a cooling system for an extended-range bus provided by one or more embodiments of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0029] It should be noted that the terms herein are only intended to describe specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] Terminology explanation:

[0031] An extended-range vehicle refers to a vehicle that can be charged externally and onboard, and is mainly driven by an electric motor. Its working principle is that when the battery is fully charged, the battery provides electricity to drive the motor to make the vehicle move. When the battery power drops to a certain level, the range extender (a small engine) will start, drive the generator to generate electricity, and then transfer it to the motor to continue to provide power for the vehicle.

[0032] Due to the existence of the range extender, the extended-range vehicle can continue to drive after the battery is exhausted, thus avoiding the range anxiety of pure electric vehicles. Although the extended-range vehicle will produce exhaust gas when using the fuel generator, its exhaust emissions are still less than those of traditional fuel vehicles, and its impact on the environment is relatively small.

[0033] ATS radiator, full name Advanced Traction System radiator, is a radiator designed to improve the heat dissipation performance of bus engines. Its main function is to absorb and dissipate the heat generated by the engine or other components to prevent the components from overheating, thereby ensuring that the bus can maintain the best operating state under various driving conditions. The working principle is based on the principle of heat exchange. Taking engine heat dissipation as an example, when the engine is running, the coolant circulates inside the engine and absorbs the heat generated by the engine. Subsequently, the coolant is pumped into the ATS radiator, where it exchanges heat with the air inside the radiator and transfers the heat to the air. Finally, the cooled coolant is pumped back into the engine again for continued circulation. At the same time, ATS radiators are usually equipped with fans to accelerate the air flow around the radiator and improve heat dissipation efficiency.

[0034] The ATS radiator has a high degree of integration in design. It can be customized and assembled according to the needs of different vehicles and application scenarios. This integration enables the ATS radiator to meet the cooling needs of the engine and other high-voltage components at the same time.

[0035] As introduced in the background technology, since extended-range buses take into account the advantages of both pure electric vehicles and traditional vehicles, there are many components of the vehicle, especially many important components with heat dissipation requirements. The existing technology often connects the heat dissipation pipes of multiple components in series and uses multi-way valves to achieve a balance between the heat dissipation requirements of different components. It is difficult to ensure the smooth and reliable operation of the important components of the vehicle, and it consumes a lot of energy.

[0036] Therefore, the following embodiment provides a cooling system and method for an extended-range bus, which determines the cooling requirements and coolant flow requirements of each component according to the actual operating status of the vehicle, uses the drive motor controller, generator controller and integrated power supply as one cooling cycle, the drive motor and generator as another cooling cycle, and the engine uses a separate cooling cycle. The three cycles share a set of radiators and water pumps, which can save energy to the greatest extent while ensuring the smooth and reliable operation of all important components of the vehicle.

[0037] Embodiment 1:

[0038] In extended-range buses, the components that require heat dissipation include: motor (drive motor) controller, generator controller, integrated power supply, drive motor, generator, and engine.

[0039] ATS (Advanced Traction System) radiator includes an intercooler, an engine cooling module and a high-voltage component cooling module, which are used for heat exchange. The intercooler, the engine cooling module and the high-voltage component cooling module have their own corresponding cooling fans.

[0040] Vehicle controller: used to obtain the temperature data of each component and adjust the speed of the fan and water pump.

[0041] Water pump: used to drive cooling liquid.

[0042] Expansion tank: used to regulate the pressure and replenish the cooling system.

[0043] Analyze the actual operating status of the extended-range bus and combine the components according to the heat dissipation requirements and coolant flow requirements.

[0044] Motor (drive motor) controller: coolant flow rate is not less than 20L / min, inlet coolant temperature is lower than 60℃, interface outer diameter is Φ19.5.

[0045] Generator controller: coolant flow rate is not less than 12L / min, inlet coolant temperature is lower than 60℃, interface outer diameter is Φ20.

[0046] Integrated power supply: coolant flow rate is not less than 8L / min, inlet coolant temperature is lower than 65℃, interface outer diameter is Φ25.

[0047] Drive motor: coolant flow rate is not less than 20L / min, inlet coolant temperature is lower than 60℃, interface outer diameter is Φ19.5.

[0048] Generator: Coolant flow rate is not less than 25L / min, inlet coolant temperature is lower than 65℃; interface outer diameter is Φ25.

[0049] Through analysis, the layout of the cooling system is as follows:

[0050] like Figure 1 As shown, the drive motor controller, generator controller and integrated power supply are connected in series through pipelines to form one cooling cycle, and the drive motor and generator are connected in series through pipelines to form another cooling cycle; the engine cooling circuit is a separate one.

[0051] The cooling components of the drive motor controller, generator controller and integrated power supply are connected in series through pipelines to form a cooling loop, one end of which is connected to the water pump outlet and the other end is connected to the inlet of the ATS radiator.

[0052] The cooling components of the drive motor and the generator are connected in series through pipelines to form another cooling circuit, one end of which is connected to the water pump outlet and the other end is connected to the inlet of the ATS radiator.

[0053] The engine cooling circuit is a separate circuit. Specifically, the outlet of the engine cooling circuit is connected to the engine cooling module in the ATS radiator through a pipe, and the engine cooling module is connected to the inlet of the engine cooling circuit through a pipe to form a circuit.

[0054] The expansion water tank is connected to the engine cooling circuit and the water pump inlet through pipes for water replenishment and pressure regulation.

[0055] When the vehicle is running, the coolant is pressurized by the water pump and then divided into two paths at one of the outlets of the expansion tank. One path passes through the drive motor controller, generator controller and integrated power supply, and the other path passes through the drive motor and generator. The two coolant paths finally meet in front of the ATS radiator and enter the high-voltage component cooling module in the ATS radiator together. The vehicle controller controls the fan in the high-voltage component cooling module by reading the temperature of the drive motor controller, generator controller, integrated power supply, drive motor and generator, and changes the cooling air volume by stopping, accelerating and decelerating. The temperature control strategy implemented is obtained through experimental calibration, which not only meets the optimal operating conditions of each high-voltage component, but also fully reduces energy loss (power consumption).

[0056] When the vehicle is running and the engine is generating electricity, the coolant cools the engine, and the coolant heat is exchanged with the air through the ATS radiator. At this time, the vehicle controller reads the engine coolant and intake air temperature to control the engine cooling fan in the ATS radiator in real time. The temperature control strategy is obtained through test calibration, which not only meets the optimal operating conditions of the engine, but also fully reduces energy loss (fuel consumption). During this period, the other outlet of the expansion tank is used to add coolant to the engine cylinder liner and adjust the pressure in the engine cooling circuit.

[0057] When the engine is running to generate electricity, when the engine coolant temperature or the engine intake temperature exceeds the corresponding fifth set value, the fan in the engine cooling module starts to operate; when it exceeds the corresponding sixth set value, the fan in the engine cooling module operates at full speed; when it does not exceed the corresponding fourth set value, the fan in the engine cooling module stops operating.

[0058] In this embodiment, when the engine is running to generate electricity:

[0059] When the engine coolant temperature is greater than 85°C or the engine intake air temperature is greater than 50°C, the engine cooling fan starts to operate;

[0060] When the engine coolant temperature is greater than 100°C or the engine intake temperature is greater than 60°C, the engine cooling fan runs at full speed;

[0061] When the engine coolant temperature is lower than 83°C or the engine intake temperature is lower than 48°C, the engine cooling fan stops running.

[0062] In this embodiment, different components correspond to different temperature setting values. For example, when the engine coolant temperature is greater than 85°C or the engine intake temperature is greater than 50°C, the engine cooling fan starts to operate. 85°C is the fifth setting value for the engine coolant, and 50°C is the fifth setting value for the engine intake temperature. The specific data of the setting values ​​are calibrated according to experiments.

[0063] When the high-voltage component is running, when the temperature of at least one group of the drive motor, generator, drive motor controller, generator controller and integrated power supply exceeds the corresponding second set value, the fan in the high-voltage component heat dissipation module starts to operate; when it exceeds the corresponding third set value, the fan in the high-voltage component heat dissipation module operates at full speed; when it does not exceed the corresponding first set value, the fan in the high-voltage component heat dissipation module stops operating.

[0064] In this embodiment, when the vehicle is running and the high-voltage component is in operation:

[0065] When the temperature of the drive motor is ≥80℃, or the temperature of the generator is ≥80℃, or the temperature of the drive motor controller is ≥55℃, or the temperature of the generator controller is ≥55℃, or the temperature of the integrated power supply is ≥55℃, the high-voltage component cooling fan starts to operate;

[0066] When the temperature of the drive motor is ≥100℃, or the temperature of the generator is ≥100℃, or the temperature of the drive motor controller is ≥70℃, or the temperature of the generator controller is ≥70℃, or the temperature of the integrated power supply is ≥70℃, the high-voltage component cooling fan runs at full speed;

[0067] When the temperature of the drive motor is ≤60℃, or the temperature of the generator is ≤60℃, or the temperature of the drive motor controller is ≤48℃, or the temperature of the generator controller is ≤48℃, or the temperature of the integrated power supply is ≤48℃, the high-voltage component cooling fan stops running;

[0068] According to the coolant flow requirements of the components with heat dissipation requirements in the extended-range bus, after permutations and combinations, the drive motor controller, generator controller and integrated power supply are connected in series to form the first cooling cycle, the drive motor and generator pipelines are connected in series to form the second cooling cycle, and the engine cooling circuit is a separate one. When the bus is in pure electric mode, the generator and engine are not working, then the second cooling cycle only bears the heat generated by the drive motor. Since the first cooling cycle is designed for electronic devices with relatively smaller heat generation, the heat demand can be met by the high-voltage component heat dissipation module in the ATS radiator; when the vehicle is in extended-range operation, the engine and generator are put into operation, and the heat generated by the generator is cooled by a separate heat dissipation circuit. Although the heat load brought by the generator is increased in the second cooling cycle, the water pump and the high-voltage component heat dissipation module in the ATS radiator can respond to the heat dissipation demand by increasing the flow rate and fan speed, which can not only solve the heat dissipation requirements of the extended-range bus and ensure the reliable and safe operation of the whole vehicle, but also meet the energy-saving and noise requirements to the maximum extent.

[0069] At the same time, when the above design is adopted, the layout of the pipelines is relatively simplified, and a water pump is sufficient to meet the circulation of the coolant. The integrated design of the ATS radiator is conducive to reducing the space occupied by components in the bus.

[0070] Embodiment 2:

[0071] A heat dissipation method for an extended-range passenger car comprises the following steps:

[0072] The coolant is pressurized by a water pump from one of the outlets of the expansion tank and then passes through the first cooling circuit and the second cooling circuit respectively to cool the drive motor controller, generator controller and integrated power supply, as well as the drive motor and generator. The two coolants pass through the high-voltage component cooling module in the ATS radiator to exchange heat with the air.

[0073] When the engine is running to generate electricity, the coolant cools the engine through the engine cooling circuit, and the coolant heat exchanges with the air through the engine cooling module in the ATS radiator.

[0074] According to the coolant flow requirements of the components with heat dissipation requirements in the extended-range bus, after permutations and combinations, the drive motor controller, generator controller and integrated power supply are connected in series to form the first cooling cycle, the drive motor and generator pipelines are connected in series to form the second cooling cycle, and the engine cooling circuit is a separate one. When the bus is in pure electric mode, the generator and engine are not working, then the second cooling cycle only bears the heat generated by the drive motor. Since the first cooling cycle is designed for electronic devices with relatively smaller heat generation, the heat demand can be met by the high-voltage component heat dissipation module in the ATS radiator; when the vehicle is in extended-range operation, the engine and generator are put into operation, and the heat generated by the generator is cooled by a separate heat dissipation circuit. Although the heat load brought by the generator is increased in the second cooling cycle, the water pump and the high-voltage component heat dissipation module in the ATS radiator can respond to the heat dissipation demand by increasing the flow rate and fan speed, which can not only solve the heat dissipation requirements of the extended-range bus and ensure the reliable and safe operation of the whole vehicle, but also meet the energy-saving and noise requirements to the maximum extent.

[0075] 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 cooling system for an extended-range bus, characterized in that: include: A first cooling circuit includes a drive motor controller, a generator controller and a heat dissipation element of an integrated power supply connected in series through a pipeline, one end of the pipeline is connected to the outlet of the water pump, and the other end of the pipeline is connected to the inlet of the ATS radiator; A second cooling circuit includes heat dissipation elements of the drive motor and the generator connected in series through a pipeline, one end of the pipeline is connected to the outlet of the water pump, and the other end of the pipeline is connected to the inlet of the ATS radiator; The engine cooling circuit includes an engine cooling cylinder liner, the engine cooling cylinder liner is connected to the inlet of the ATS radiator through a pipeline, and the outlet of the ATS radiator is connected to the engine cooling cylinder liner through a pipeline.

2. A cooling system for an extended-range bus as claimed in claim 1, characterized in that: The inlet of the water pump is connected to the first outlet of the expansion water tank through a pipeline.

3. A cooling system for an extended-range bus as claimed in claim 2, characterized in that: The second outlet of the expansion water tank is connected to the engine cooling cylinder liner through a pipeline.

4. The cooling system for a range-extended bus as claimed in claim 1, characterized in that: The ATS radiator includes at least an engine cooling module and a high-voltage component cooling module. The engine cooling module is used to transfer heat from the engine to the external environment through a fan and a radiator. The high-voltage component cooling module is used to exchange heat from the drive motor, generator, drive motor controller, generator controller and integrated power supply with air through a fan and a radiator.

5. The cooling system for a range-extended bus as claimed in claim 1, characterized in that: After the coolant is pressurized by the water pump, it is divided into two paths at one of the outlets of the expansion tank. The first cooling circuit passes through the drive motor controller, generator controller and integrated power supply in sequence, and the second cooling circuit passes through the drive motor and generator in sequence. The two coolant paths meet in front of the ATS radiator and enter the high-voltage component cooling module in the ATS radiator together.

6. The cooling system for a range-extended bus as claimed in claim 1, characterized in that: When the engine is running to generate electricity, the coolant cools the engine through the engine cooling circuit, and the coolant heat exchanges with the air through the engine cooling module in the ATS radiator.

7. The cooling system for a range-extended bus as claimed in claim 1, characterized in that: When the high-voltage component is running, when at least one of the drive motor temperature, generator temperature, drive motor controller temperature, generator controller temperature and integrated power supply temperature exceeds the corresponding second set value, the fan in the high-voltage component heat dissipation module starts to operate; when it exceeds the corresponding third set value, the fan in the high-voltage component heat dissipation module operates at full speed; when it does not exceed the corresponding first set value, the fan in the high-voltage component heat dissipation module stops operating.

8. The cooling system for a range-extended bus as claimed in claim 1, characterized in that: When the engine is running to generate electricity, when the engine coolant temperature or the engine intake temperature exceeds the corresponding fifth set value, the fan in the engine cooling module starts to operate; when it exceeds the corresponding sixth set value, the fan in the engine cooling module operates at full speed; when it does not exceed the corresponding fourth set value, the fan in the engine cooling module stops operating.

9. The cooling system for a range-extended bus as claimed in claim 1, characterized in that: It also has a vehicle controller for obtaining the temperature of the engine, drive motor, generator, engine, drive motor controller, generator controller and integrated power supply, and controls the fan speed of each cooling module in the ATS radiator according to the set temperature control strategy.

10. A method for heat dissipation based on the system of the range-extended passenger vehicle according to any one of claims 1 to 9, characterized in that: The following steps are involved: The coolant is pressurized by a water pump from one of the outlets of the expansion tank and then passes through the first cooling circuit and the second cooling circuit respectively to cool the drive motor controller, generator controller and integrated power supply, as well as the drive motor and generator. The two coolants pass through the high-voltage component cooling module in the ATS radiator to exchange heat with the air. When the engine is running to generate electricity, the coolant cools the engine through the engine cooling circuit, and the coolant heat exchanges with the air through the engine cooling module in the ATS radiator.

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