Power assembly cooling system and vehicle

Abstract

The utility model discloses a power assembly cooling system and a vehicle, the power assembly cooling system comprises a first cooling loop and a second cooling loop, the first cooling loop is suitable for exchanging heat with multiple first heat dissipation units, and the multiple first heat dissipation units are arranged on the peripheral side of a fuel cell to dissipate heat of the fuel cell; the second cooling loop is suitable for cooling the electric drive bridge, a plurality of second heat dissipation units are further arranged in the second cooling loop, and the second heat dissipation units are arranged on the front side of the electric drive bridge; wherein the first cooling loop and the second cooling loop are connected in parallel, and at least part of the second heat dissipation units and at least part of the first heat dissipation units directly face each other in the left-right direction of the vehicle body. Therefore, according to the power assembly cooling system, the performance of the power assembly can be optimized, the working efficiency and safety are improved, the economic cost can be saved, the space utilization rate of the whole vehicle is optimized, light weight is achieved, and energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the field of thermal management systems for fuel cell vehicles, and in particular to a powertrain cooling system and a vehicle. Background Art

[0002] In recent years, fuel cells, as a clean energy technology, have been increasingly used in vehicles. However, fuel cells generate a lot of heat during operation, and the powertrain of fuel cell vehicles has a high heat dissipation demand. In order to control the temperature of various components of fuel cell vehicles, improve work efficiency, and prevent the fuel cell, drive motor and other components from overheating and causing safety hazards, it is necessary to provide forced circulation cooling for the corresponding powertrain components. At present, the powertrain cooling system of fuel cell vehicles is generally composed of a stack cooling system, a motor cooling system and a power battery cooling system in parallel. Multiple radiators are used to configure multiple arrays of low-voltage electronic fans, and heat is exchanged through water channels to achieve cooling of the fuel cell vehicle powertrain. At the same time, the cooling of the power battery and the passenger compartment is achieved by arranging a condenser and configuring a low-voltage electronic fan for heat dissipation.

[0003] In the related technology, the cooling system of the powertrain of fuel cell vehicles has poor cooling performance and cannot meet the heat dissipation requirements of the fuel cell, which causes the fuel cell to be easily limited in power or even thermal runaway, seriously affecting the working performance and safety of the fuel cell. In addition, the cooling system of the powertrain of fuel cell vehicles has many components such as radiators and low-voltage electronic fans, and the components have low integration, resulting in a large layout and reduced space utilization of the vehicle. At the same time, it also leads to increased costs and increased weight, increased energy consumption of the vehicle, and reduced cruising range. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to propose a powertrain cooling system, which can optimize powertrain performance, improve work efficiency and safety, save economic costs, optimize vehicle space utilization, achieve lightweight and save energy.

[0005] The present application also provides a vehicle having the powertrain cooling system.

[0006] According to the powertrain cooling system of the first aspect embodiment of the present application, the powertrain cooling system includes: a first cooling circuit and a second cooling circuit, the first cooling circuit is suitable for exchanging heat with multiple first heat dissipation units, and the multiple first heat dissipation units are arranged on the peripheral side of the fuel cell to dissipate heat from the fuel cell; the second cooling circuit is suitable for cooling the electric drive axle, and multiple second heat dissipation units are also arranged in the second cooling circuit, and the multiple second heat dissipation units are arranged on the front side of the electric drive axle; wherein the first cooling circuit is connected in parallel with the second cooling circuit, and the multiple second heat dissipation units and at least part of the multiple first heat dissipation units are directly opposite to each other in the left and right direction of the vehicle body.

[0007] According to the powertrain cooling system of the present application, through the first cooling circuit and the second cooling circuit, the fuel cell, electric drive axle and other components can be efficiently cooled, the powertrain heat dissipation requirements can be met in time, the powertrain performance can be optimized, and the work efficiency and safety can be improved. In addition, compared with the related art, multiple radiators are respectively equipped with multiple arrays of low-voltage electronic fans, resulting in more parts and low integration, resulting in increased cost and weight, and large layout space. In the present application, multiple first heat dissipation units are all located in the same cooling circuit, and multiple second heat dissipation units are directly opposite to at least part of the multiple first heat dissipation units in the left and right directions of the vehicle body, which can achieve integration and reduce the number of components, thereby saving production materials, reducing weight, and saving layout space, saving economic costs, optimizing the space utilization of the whole vehicle, and achieving lightweight, saving energy consumption, and increasing cruising range.

[0008] According to some embodiments of the present application, the second cooling circuit is also suitable for cooling the power distribution unit and the fuel cell BOP, and a first fan is arranged in the second cooling circuit. The multiple first heat dissipation units include: a main radiator of the fuel cell stack, which is arranged at the front end of the vehicle body and is directly opposite to the first fan in the front and rear direction of the vehicle body.

[0009] Furthermore, the plurality of the second heat dissipation units are constructed as two motor radiators, and the plurality of the first heat dissipation units also include: two battery stack auxiliary radiators, the two battery stack auxiliary radiators are respectively arranged on the left and right sides of the vehicle body, and are respectively opposite to the two motor radiators in the left and right directions of the vehicle body.

[0010] Furthermore, the two motor radiators are respectively located on the side of the two stack auxiliary radiators facing away from each other, and a second fan and a third fan are arranged in the second cooling circuit. The second fan and the third fan are respectively located on the side of the two stack auxiliary radiators facing each other.

[0011] Furthermore, the first fan, the second fan, and the third fan each have a fan motor, and the three fan motors are connected in series to the second cooling circuit.

[0012] Further, the first fan, the second fan and the third fan are all configured as high-pressure fans.

[0013] In some embodiments, the first fan and the stack main radiator are constructed as an integral part; the second fan and the third fan are respectively constructed as an integral part with the two stack auxiliary radiators and the two motor radiators.

[0014] According to some embodiments of the present application, the powertrain cooling system further includes: a controller and a water pump, the controller being suitable for controlling the rotation speeds of the first fan, the second fan and the third fan; the water pump being arranged in the first cooling circuit and the second cooling circuit.

[0015] According to the vehicle of the second aspect of the present application, the vehicle includes: the powertrain cooling system described in any one of the above embodiments.

[0016] According to some embodiments of the present application, the vehicle also includes a body, the fuel cell and the electric drive axle are spaced apart in the front and rear directions of the body, and the spacing area therebetween forms an installation space, the installation space is suitable for installing at least part of a plurality of the first heat dissipation units and a plurality of the second heat dissipation units, and the first heat dissipation units and the second heat dissipation units are opposite to and spaced apart in the installation space.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of a powertrain cooling system circuit according to some embodiments of the present application;

[0020] Figure 2 is a schematic diagram of a partial vehicle structure according to some embodiments of the present application;

[0021] Figure 3 is a schematic diagram of an integrated first fan and a main heat sink of a stack according to some embodiments of the present application;

[0022] Figure 4This is a schematic diagram of the second fan integrated with the main radiator of the fuel cell stack and the motor radiator according to some embodiments of the present application.

[0023] Reference numerals:

[0024] Powertrain cooling system 1;

[0025] A first cooling circuit 11;

[0026] Fuel cell 111, stack auxiliary radiator 112, stack main radiator 113;

[0027] A second cooling circuit 12;

[0028] Fuel cell BOP 121, third fan 122, first fan 123, second fan 124, second heat dissipation unit 125, power distribution unit 126, electric drive axle 127;

[0029] Water pump 13, water tank 14, condenser 15, bracket 16;

[0030] Vehicle 2;

[0031] Vehicle frame 21; hydrogen bottle 22; rear axle 23. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0034] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0037] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0040] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0041] The term "plurality" used in the present application refers to two or more (including two).

[0042] In the present application, the fuel cell may include an alkaline fuel cell, a proton exchange membrane fuel cell, a phosphoric acid fuel cell, a molten carbonate fuel cell or a solid oxygen fuel cell, etc., and the embodiments of the present application are not limited to this.

[0043] Reference below Figures 1-4 A powertrain cooling system 1 and a vehicle 2 according to an embodiment of the present application are described.

[0044] like Figure 1 As shown, according to the powertrain cooling system 1 of the first embodiment of the present application, the powertrain cooling system 1 includes: a first cooling circuit 11 and a second cooling circuit 12 .

[0045] Among them, the first cooling circuit 11 is suitable for exchanging heat with multiple first heat dissipation units, and the multiple first heat dissipation units are arranged on the surrounding side of the fuel cell 111 to dissipate heat for the fuel cell 111; the second cooling circuit 12 is suitable for cooling the electric drive axle 127, and multiple second heat dissipation units 125 are also arranged in the second cooling circuit 12, and the multiple second heat dissipation units 125 are set on the front side of the electric drive axle 127; the first cooling circuit 11 is connected in parallel with the second cooling circuit 12, and the multiple second heat dissipation units 125 are directly opposite to at least part of the multiple first heat dissipation units in the left and right direction of the vehicle body.

[0046] Specifically, the first heat dissipation unit can be constructed as a plurality of units, and respectively arranged on the peripheral side of the fuel cell 111, and different first heat dissipation units can be arranged on different peripheral sides of the fuel cell 111. For example, at least part of the first heat dissipation units can be arranged on the left and right sides of the fuel cell 111, and at least another part of the first heat dissipation units can be arranged on the front side of the fuel cell 111. In this way, the heat dissipation coverage of the fuel cell 111 by the plurality of first heat dissipation units can be increased, and the heat dissipation and cooling effect and efficiency of the fuel cell 111 can be improved. The first heat dissipation unit can dissipate heat to the outside through airflow, and at the same time, the first heat dissipation unit can exchange heat with the coolant (such as cooling water) in the first cooling circuit 11 to improve the heat dissipation effect; the second cooling circuit 12 can cool the electric drive bridge 127 so that the electric drive bridge 127 is within a suitable operating temperature range, wherein the electric drive bridge 127 can include components such as a motor, an electronic controller, and a reducer, which are mainly used to provide power for the vehicle 2, and are responsible for controlling the speed and power output of the wheels. The multiple second heat dissipation units 125 in the second cooling circuit 12 can be reasonably arranged on the front side of the electric drive axle 127 in the front-rear direction of the vehicle body to dissipate heat; the first cooling circuit 11 and the second cooling circuit 12 are connected in parallel, and the coolant in the first cooling circuit 11 and the coolant in the second cooling circuit 12 can circulate with each other to facilitate temperature control of the overall powertrain cooling system 1; the multiple second heat dissipation units 125 are directly opposite to at least part of the multiple first heat dissipation units in the left-right direction of the vehicle body, which is beneficial to improving component integration, saving layout space, and further improving the temperature control performance of the powertrain cooling system 1.

[0047] It should be noted that the first cooling circuit 11 and the second cooling circuit 12 are both circulating cooling circuits connected in series, so as to continuously cool down the components in the respective cooling circuits.

[0048] According to the powertrain cooling system 1 of the present application, through the first cooling circuit 11 and the second cooling circuit 12, the fuel cell 111, the electric drive bridge 127 and other components can be efficiently cooled, the powertrain heat dissipation requirements can be met in time, the powertrain performance can be optimized, and the work efficiency and safety can be improved. In addition, compared with the related art, multiple radiators are respectively equipped with multiple arrays of low-voltage electronic fans, resulting in more parts and low integration, resulting in increased cost and weight, and large layout space. In the present application, multiple first heat dissipation units are all located in the same cooling circuit, and multiple second heat dissipation units 125 are directly opposite to at least part of the multiple first heat dissipation units in the left and right directions of the vehicle body, which can achieve integration and reduce the number of components, thereby saving production materials, reducing weight, and saving layout space, saving economic costs, optimizing the space utilization of the whole vehicle, and achieving lightweight, saving energy consumption, and increasing cruising range.

[0049] like Figure 1 andFigure 2 As shown, according to some embodiments of the present application, the second cooling circuit 12 is also suitable for cooling the power distribution unit 126 and the fuel cell BOP121 (Balance of Plant, non-battery components of the fuel cell system), and a first fan 123 is arranged in the second cooling circuit 12. The multiple first heat dissipation units include: a main radiator of the stack 113, which is arranged at the front end of the vehicle body and is directly opposite to the first fan 123 in the front and rear direction of the vehicle body.

[0050] Specifically, the power distribution unit 126 can distribute, manage, and protect electric energy. The power distribution unit 126 and the fuel cell BOP121 can both exchange heat with the coolant in the second cooling circuit 12 to dissipate heat in time to ensure that they are in a suitable temperature range, thereby ensuring that the power distribution unit 126 and the fuel cell BOP121 have good working performance and safety. Among them, the power distribution unit 126, the electric drive bridge 127, and the fuel cell BOP121 are all located in the second cooling circuit 12, and the cooling channels flowing through the power distribution unit 126, the electric drive bridge 127, and the fuel cell BOP121 can be connected in series in sequence. In this way, on the basis of meeting the heat dissipation requirements of the power distribution unit 126, the electric drive bridge 127, and the fuel cell BOP121, the integration of the powertrain cooling system 1 can be improved, which helps to save the layout space and improve the accuracy and reliability of the powertrain cooling system 1 in controlling the temperature.

[0051] It should be noted that the multiple first heat dissipation units of the present application include a stack main radiator 113, which is suitable for dissipating heat for the fuel cell 111, so as to effectively dissipate the heat generated by the fuel cell 111, so as to improve the operating reliability and stability of the fuel cell 111. The stack main radiator 113 can be arranged at the front end of the vehicle body (such as the power compartment position of the vehicle 2), and the grille at the front end of the vehicle 2 can provide a channel for the external airflow to flow to the stack main radiator 113, so that the stack main radiator 113 can use the oncoming wind of the vehicle 2 to improve the heat dissipation efficiency and effect. In addition, the first fan 123 in the second cooling circuit 12 can be arranged at the front end of the vehicle body, and face the stack main radiator 111 in the front and rear direction of the vehicle body. The first fan 123 can increase the flow rate of the air around the stack main radiator 113, strengthen heat conduction and convection, so as to accelerate the airflow to take away the heat dissipated by the stack main radiator 113, and further improve the heat dissipation efficiency.

[0052] It can be understood that the main radiator 113 of the battery stack can utilize the oncoming wind entering through the front grille of the vehicle 2. When the same air volume is required, the oncoming wind can provide part or even all of the required air volume. Therefore, the driving energy consumption of the first fan 123 can be saved and the energy efficiency of the entire vehicle can be improved.

[0053] In addition, in some specific embodiments of the present application, the side skirt of the vehicle body has a through hole connected to the outside world. The oncoming wind entering from the front grille of the vehicle 2 can be diverted and flow to the outside world from the through holes on the left and right sides of the vehicle body, thereby playing a good role in guiding air, which is beneficial to increasing the air volume and enhancing the heat dissipation effect.

[0054] like Figure 1 and Figure 2 As shown, according to some embodiments of the present application, the multiple second heat dissipation units 125 are constructed as two motor radiators, and the multiple first heat dissipation units also include: two battery stack auxiliary radiators 112, the two battery stack auxiliary radiators 112 are respectively arranged on the left and right sides of the vehicle body, and are respectively opposite to the two motor radiators in the left and right directions of the vehicle body.

[0055] Specifically, the motor radiator can dissipate heat and cool down the motor and other components of the electric drive bridge 127, so that they work within an appropriate temperature range to ensure the overall working reliability and safety of the motor and the electric drive bridge 127. The motor radiator is constructed in two and can be arranged on the left and right sides of the vehicle body respectively. The two motor radiators can exchange heat with the coolant in the second cooling circuit 12 to improve the heat dissipation effect; the stack auxiliary radiator 112 can dissipate heat for the fuel cell 111 to effectively dissipate the heat generated by the fuel cell 111 to improve the operating reliability and stability of the fuel cell 111. The stack auxiliary radiator 112 is constructed in two, one of which can be set on the left side of the vehicle body (such as the left longitudinal beam position of the frame 21), and the other stack auxiliary radiator 112 can be set on the right side of the vehicle body (such as the right longitudinal beam position of the frame 21). The two stack auxiliary radiators 112 are respectively opposite to the two motor radiators in the left and right directions of the vehicle body. In this way, the rationality of the installation and layout of the stack auxiliary radiator 112 and the motor radiator can be improved, the component integration can be improved, and the layout space can be saved.

[0056] In addition, the two stack auxiliary radiators 112 are respectively arranged on the left and right sides of the vehicle body, and the stack main radiator 113 is arranged at the front end of the vehicle body, so that the two stack auxiliary radiators 112 and one stack main radiator 113 are respectively located at different positions of the fuel cell 111, which improves the comprehensiveness of the coverage of heat dissipation and cooling of the fuel cell 111 and can enhance the cooling effect of the fuel cell 111.

[0057] like Figure 1 and Figure 2 As shown, according to some embodiments of the present application, the two motor radiators are respectively located on the sides of the two fuel cell stack auxiliary radiators 112 facing away from each other, and a second fan 124 and a third fan 122 are arranged in the second cooling circuit 12. The second fan 124 and the third fan 122 are respectively located on the sides of the two fuel cell stack auxiliary radiators 112 facing each other.

[0058] Specifically, the two motor radiators are respectively opposite to the stack sub-radiators 112 located on the left and right sides of the vehicle body in the left-right direction of the vehicle body, and the two motor radiators are respectively located on the side of the two stack sub-radiators 112 away from each other (defined by the space inside and outside the vehicle, the motor radiator is arranged on the outside of the corresponding stack sub-radiator 112), and the second fan 124 and the third fan 122 in the second cooling circuit 12 are respectively located on the side of the two stack sub-radiators 112 facing each other (defined by the space inside and outside the vehicle, the second fan 124 and the third fan 122 are arranged on the inside of the corresponding stack sub-radiator 112), so that the stack sub-radiator 112 is located between the motor radiator and the second fan 124 or the third fan 122, and the motor radiator is located on the outside of the stack sub-radiator 112.

[0059] In the present application, the water temperature limit of the motor radiator of the second cooling circuit 12 is lower than the water temperature limit of the stack auxiliary radiator 112 of the first cooling circuit 11. For example, the water temperature limit of the motor radiator is about 60°C, and the water temperature limit of the stack auxiliary radiator 112 is about 85°C. When the second fan 124 and the third fan 122 are running, the driving airflow first passes through the outermost motor radiator to take away the heat on the surface of the motor radiator, and then flows through the stack auxiliary radiator 112 to take away the heat on the surface of the stack auxiliary radiator 112. In this process, since the water temperature limit of the outermost motor radiator is lower than the water temperature limit of the stack auxiliary radiator 112, the airflow will not affect the heat dissipation effect of the subsequent flow through the stack auxiliary radiator 112 after passing through the motor radiator. In the present application, the motor radiator, the stack auxiliary radiator 112 and the fan are stacked in sequence to improve the compactness of the assembly structure and save space occupied by component layout. At the same time, by utilizing the different water temperature limits of the motor radiator and the stack auxiliary radiator 112, the motor radiator and the stack auxiliary radiator 112 can share the same fan, which can reduce the number of components, save costs, and achieve lightweight while meeting the heat dissipation requirements.

[0060] In addition, compared with the related art, the cooling of the power battery and the passenger compartment is achieved by arranging a condenser 15 and configuring a low-voltage electronic fan for heat dissipation. In the present application, the condenser 15 can be arranged at the front end of the vehicle body and directly face the first fan 123 in the front-rear direction of the vehicle body. The condenser 15 and the main radiator 113 of the battery stack can share the first fan 123 to meet the heat dissipation requirements, thereby further reducing the number of components, saving costs, and further improving integration, saving layout space and improving lightweight.

[0061] like Figure 1 As shown, according to some embodiments of the present application, the first fan 123 , the second fan 124 , and the third fan 122 each have a fan motor, and the three fan motors are connected in series to the second cooling circuit 12 .

[0062] Specifically, the fan motor can provide driving force for the first fan 123, the second fan 124 and the third fan 122 to realize normal rotation of the first fan 123, the second fan 124 and the third fan 122. The first fan 123 can have a first fan 123 motor, the second fan 124 can have a second fan 124 motor, and the third fan 122 can have a third fan 122 motor. The first fan 123 motor, the second fan 124 motor and the third fan 122 motor are connected in series to the second cooling circuit 12, and can be cooled by the coolant in the second cooling circuit 12, so that the working performance and reliability of the first fan 123 motor, the second fan 124 motor and the third fan 122 motor can be improved.

[0063] In addition, in some specific embodiments of the present application, the fuel cell BOP121, the fan motor, the motor radiator, the power distribution unit 126, and the electric drive bridge 127 are sequentially connected in series to the second cooling circuit 12. The coolant in the second cooling circuit 12 can flow through the fuel cell BOP121, three fan motors, two motor radiators, the power distribution unit 126, and the electric drive bridge 127 in sequence, and then flow through the fuel cell BOP121 to form a circulating cooling circuit, so that the fuel cell BOP121, the fan motor, the motor radiator, the power distribution unit 126 and the electric drive bridge 127 can all exchange heat with the coolant in the second cooling circuit 12 to achieve rapid heat dissipation and cooling, which can ensure the working efficiency and safety of each component. In addition, the use of multiple components sharing the same cooling circuit can also help improve the convenience of controlling the cooling effect of the components in the second cooling circuit 12. For example, the cooling intensity can be regulated by controlling the coolant circulation speed to meet the working temperature requirements of the components.

[0064] In some other specific embodiments of the present application, the fuel cell 111, one of the stack auxiliary radiators 112, the stack main radiator 113, and the other of the stack auxiliary radiator 112 are sequentially connected in series to the first cooling circuit 11. Similarly, the coolant in the first cooling circuit 11 can flow through the fuel cell 111, one of the stack auxiliary radiators 112, the stack main radiator 113, and the other of the stack auxiliary radiator 112 in sequence, and then flow through the fuel cell 111 to form a circulating cooling circuit, so that the fuel cell 111, the stack main radiator 113 and the two stack auxiliary radiators 112 can all exchange heat with the coolant in the first cooling circuit 11 to achieve rapid heat dissipation and cooling, which can ensure the working efficiency and safety of each component. In addition, it also helps to improve the convenience of controlling the cooling effect of components in the first cooling circuit 11.

[0065] like Figures 1-4As shown, according to some embodiments of the present application, the first fan 123 , the second fan 124 , and the third fan 122 are all configured as high-pressure fans.

[0066] Specifically, the high-voltage fan has the advantages of high power, large air volume, stable operation, high reliability, small size, and energy-saving and high efficiency. Compared with the related art, a single radiator needs to be configured with multiple low-voltage electronic fans in an array. In this embodiment, the first fan 123, the second fan 124, and the third fan 122 are all constructed as high-voltage fans, so that the radiator does not need to be configured with multiple fans in an array to meet the heat dissipation requirements. Therefore, the use of high-voltage fans in this embodiment can improve the heat dissipation efficiency, reduce the number of components, save layout space, achieve lightweight, and save energy. In addition, the low-voltage electronic fan has a large operating noise, while the high-voltage fan has a more stable speed, which can effectively reduce noise pollution, thereby providing a more comfortable user experience.

[0067] like Figure 2 , Figure 3 and Figure 4 As shown, according to some embodiments of the present application, the first fan 123 is integrated with the stack main radiator 113; the second fan 124 and the third fan 122 are respectively integrated with the two stack auxiliary radiators 112 and the two motor radiators.

[0068] Specifically, the first fan 123 can be constructed as an integral part with the main radiator 113 of the battery stack, the second fan 124 can be constructed as an integral part with one of the two auxiliary radiators 112 of the battery stack and one of the two motor radiators, and the third fan 122 can be constructed as an integral part with another auxiliary radiator 112 of the battery stack and another motor radiator. In this way, on the first hand, each fan is fixed on the corresponding radiator, which is beneficial to ensure the distance between the fan blades and the wind guide cover of each fan, and is beneficial to improve the fan performance; on the second hand, it can improve the heat dissipation between the fan and the main radiator 113 of the battery stack, the auxiliary radiator 112 of the battery stack and the motor. The compact structure of the fan can save layout space, save costs, and achieve lightweight; thirdly, by constructing the first fan 123 with the main radiator 113 of the fuel cell stack, the second fan 124 and the third fan 122 with the auxiliary radiator 112 of the fuel cell stack and the motor radiator as an integrated part, the fan and the main radiator 113 of the fuel cell stack, as well as the fan and the auxiliary radiator 112 of the fuel cell stack and the motor radiator are modularized and standardized, so that the arrangement of the fan, the main radiator 113 of the fuel cell stack, the auxiliary radiator 112 of the fuel cell stack and the motor radiator is not restricted by the vehicle platform, thereby improving its adaptability to different vehicle platforms.

[0069] Preferably, in some specific embodiments of the present application, a bracket 16 is provided between the first fan 123 and the main radiator 113 of the fuel cell stack, and between the second fan 124 and the third fan 122 and the auxiliary radiator 112 of the fuel cell stack and the motor radiator, respectively. The fan and the radiator can be integrated into one by welding the bracket 16. The bracket 16 can be a steel pipe to ensure good connection stability between the components.

[0070] like Figure 1 As shown, according to some embodiments of the present application, the powertrain cooling system 1 further includes: a controller and a water pump 13 .

[0071] The controller is suitable for controlling the rotation speeds of the first fan 123 , the second fan 124 and the third fan 122 ; the water pump 13 is disposed in the first cooling circuit 11 and the second cooling circuit 12 .

[0072] Specifically, the heat dissipation components such as the electric drive bridge 127, the fuel cell BOP121, the power distribution unit 126, and the fan motor can be arranged with temperature sensors, and each temperature sensor can feed back temperature information to the controller, so that the controller can adjust the speed of the first fan 123, the second fan 124, and the third fan 122 according to the temperature of each heat dissipation component, so that the air volume meets the heat dissipation requirements of each component. For example, when the heat dissipation of each heat dissipation component is high, the controller can control the increase of the speed of the first fan 123, the second fan 124, and the third fan 122 to enhance the heat dissipation effect. By setting the controller, the first fan 123, the second fan 124, and the third fan 122 are controlled jointly, which effectively improves the accuracy and convenience of the air volume control of the first fan 123, the second fan 124, and the third fan 122.

[0073] In this embodiment, the arrangement of the water pump 13 is that the first cooling circuit 11 and the second cooling circuit 12 are both provided with the water pump 13. The water pump 13 can be used to extract and transport the coolant to ensure that the coolant continues to flow in the first cooling circuit 11 and the second cooling circuit 12 to provide a continuous cooling effect for each component. The operation of the water pump 13 can be controlled by a temperature sensor, etc., and the start and stop of the water pump 13 can be automatically adjusted according to the increase or decrease of the coolant temperature, thereby realizing intelligent control.

[0074] In addition, in some specific embodiments of the present application, the powertrain cooling system 1 also includes a water tank 14, which is constructed into two and is respectively arranged in the first cooling circuit 11 and the second cooling circuit 12. The water tank 14 can store coolant to provide coolant for the first cooling circuit 11 and the second cooling circuit 12.

[0075] like Figures 1-4As shown, according to the vehicle 2 of the embodiment of the second aspect of the present application, the vehicle 2 includes: the powertrain cooling system 1 described in any one of the above embodiments. Since the vehicle 2 according to the embodiment of the second aspect of the present application includes the powertrain cooling system 1 described in any one of the above embodiments, the powertrain cooling system 1 in the vehicle 2 can achieve efficient cooling and heat dissipation through the first cooling circuit 11 and the second cooling circuit 12, and timely meet the powertrain heat dissipation requirements to optimize the powertrain performance, improve work efficiency and safety, and can also improve component integration, reduce the number of components, save production materials, reduce weight, and save layout space, so as to save economic costs, optimize the space utilization of the whole vehicle, and achieve lightweight, save energy consumption, and increase cruising range.

[0076] like Figures 1-4 As shown, according to some embodiments of the present application, the vehicle 2 also includes a body, the fuel cell 111 and the electric drive axle 127 are spaced apart in the front and rear directions of the body, and the spacing area between the two is formed as an installation space, the installation space is suitable for installing at least part of multiple first heat dissipation units and multiple second heat dissipation units 125, and the first heat dissipation units and the second heat dissipation units 125 are opposite and spaced apart in the installation space.

[0077] Specifically, the fuel cell 111 and the electric drive axle 127 can be spaced apart in the front-rear direction of the vehicle body, and the spacing area between the fuel cell 111 and the electric drive axle 127 is formed as an installation space. At least part of the first heat dissipation unit and the second heat dissipation unit 125 can be arranged in this installation space to achieve a reasonable arrangement of the first heat dissipation unit and the second heat dissipation unit 125 on the vehicle body, which is conducive to improving space utilization and optimizing the heat dissipation management of the powertrain cooling system 1.

[0078] Specifically, Figure 2 As shown, the stack main radiator 113 in the first heat dissipation unit and the first fan 123 in the second cooling circuit 12 are arranged under the cab or on the front side of the chassis; hydrogen bottles 22 are arranged on both sides of the left and right sides of the frame 21, and an installation space is separated between the hydrogen bottles 22 and the rear axle 23 along the front and rear direction (driving direction) of the frame 21. The stack auxiliary radiator 112 of the first heat dissipation unit and the second heat dissipation unit 125 as well as the fan motor of the second fan 124 and the fan motor of the third fan 122 are arranged in the installation space on the left and right sides, which can realize the compact and integrated layout of multiple components, reduce space occupancy, reduce layout difficulty, and at the same time reduce the number of components to reduce material costs and overall weight.

[0079] In addition, in some specific embodiments of the present application, a control method for a powertrain cooling system 1 is proposed. The control method includes: obtaining the power of the fuel cell 111 or obtaining the ambient temperature; controlling the rotational speeds of the first fan 123, the second fan 124, and the third fan 122 according to the power of the fuel cell 111 or the ambient temperature.

[0080] Specifically, according to the control method of this embodiment, after obtaining the power of the fuel cell 111 or the ambient temperature, the rotational speeds of the first fan 123, the second fan 124, and the third fan 122 can be correspondingly controlled according to different powers of the fuel cell 111 and different ambient temperatures, so that the air volumes of the first fan 123, the second fan 124, and the third fan 122 meet the heat dissipation requirements of each component, which can improve the adaptability of each component to the environment and ensure good working performance.

[0081] Further, controlling the rotational speeds of the first fan 123, the second fan 124, and the third fan 122 according to the power of the fuel cell 111 or the ambient temperature includes: if the power of the fuel cell 111 is less than a preset comparison power value, controlling the second fan 124 and the third fan 122 to rotate, and controlling the first fan 123 to rotate at a low speed or not to rotate; if the power of the fuel cell 111 is greater than or equal to the preset comparison power value, controlling the first fan 123, the second fan 124, and the third fan 122 to rotate; or if the ambient temperature is less than a preset comparison temperature value, controlling the second fan 124 and the third fan 122 to rotate, and controlling the first fan 123 to rotate at a low speed or not to rotate; if the ambient temperature is greater than or equal to the preset comparison temperature value, controlling the first fan 123, the second fan 124, and the third fan 122 to rotate.

[0082] Specifically, according to the control method of this embodiment, the rotational speeds of the first fan 123, the second fan 124, and the third fan 122 can be controlled according to the power of the fuel cell 111 or the ambient temperature. When the power of the fuel cell 111 is less than the preset comparison power value, or the ambient temperature is less than the preset comparison temperature value, the heat dissipation of the components is low. At this time, the second fan 124 and the third fan 122 can be controlled to rotate, while controlling the first fan 123 to rotate at a low speed or not to rotate. In this way, energy consumption can be saved while meeting the heat dissipation requirements of the components; when the power of the fuel cell 111 is greater than or equal to the preset comparison power value, or the ambient temperature is greater than or equal to the preset comparison temperature value, the heat dissipation of the components is high. At this time, the first fan 123, the second fan 124, and the third fan 122 can be controlled to rotate together to meet the large heat dissipation requirements, so as to ensure that the components have good working performance and improve safety.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0084] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A powertrain cooling system, characterized in that: include: A first cooling circuit (11), the first cooling circuit (11) being suitable for exchanging heat with a plurality of first heat dissipation units, the plurality of first heat dissipation units being arranged on the peripheral side of the fuel cell (111) to dissipate heat for the fuel cell (111); A second cooling circuit (12), the second cooling circuit (12) is suitable for cooling the electric drive bridge (127), and a plurality of second heat dissipation units (125) are arranged in the second cooling circuit (12), and the plurality of second heat dissipation units (125) are arranged on the front side of the electric drive bridge (127); wherein The first cooling circuit (11) and the second cooling circuit (12) are connected in parallel, and the plurality of second heat dissipation units (125) and at least part of the plurality of first heat dissipation units face each other in the left-right direction of the vehicle body.

2. The powertrain cooling system according to claim 1, characterized in that: The second cooling circuit (12) is also suitable for cooling the power distribution unit (126) and the fuel cell BOP (121). A first fan (123) is arranged in the second cooling circuit (12). The first heat dissipation units include: a main radiator (113) of the stack. The main radiator (113) of the stack is arranged at the front end of the vehicle body and faces the first fan (123) in the front-rear direction of the vehicle body.

3. The powertrain cooling system according to claim 2, characterized in that: The plurality of the second heat dissipation units (125) are constructed as two motor radiators, and the plurality of the first heat dissipation units further include: two battery stack auxiliary radiators (112), the two battery stack auxiliary radiators (112) being respectively arranged on the left and right sides of the vehicle body, and respectively facing the two motor radiators in the left and right directions of the vehicle body.

4. The powertrain cooling system according to claim 3, characterized in that: The two motor radiators are respectively located on the sides of the two stack auxiliary radiators (112) facing away from each other, and a second fan (124) and a third fan (122) are arranged in the second cooling circuit (12), and the second fan (124) and the third fan (122) are respectively located on the sides of the two stack auxiliary radiators (112) facing each other.

5. The powertrain cooling system according to claim 4, characterized in that: The first fan (123), the second fan (124), and the third fan (122) each have a fan motor, and the three fan motors are connected in series to the second cooling circuit (12).

6. The powertrain cooling system according to claim 5, characterized in that: The first fan (123), the second fan (124) and the third fan (122) are all configured as high-pressure fans.

7. The powertrain cooling system according to claim 6, characterized in that: The first fan (123) and the stack main radiator (113) are constructed as an integral part; the second fan (124) and the third fan (122) are respectively constructed as an integral part with the two stack auxiliary radiators (112) and the two motor radiators.

8. The powertrain cooling system according to claim 4, characterized in that: Also includes: a controller, the controller being adapted to control the rotation speeds of the first fan (123), the second fan (124) and the third fan (122); A water pump (13), wherein the water pump (13) is arranged in the first cooling circuit (11) and the second cooling circuit (12).

9. A vehicle, characterized in that: include: A powertrain cooling system as claimed in any one of claims 1 to 8.

10. The vehicle according to claim 9, characterized in that The vehicle further comprises a vehicle body, the fuel cell (111) and the electric drive axle (127) are spaced apart in the front-rear direction of the vehicle body, and the spaced apart area between the two forms an installation space, the installation space is suitable for installing at least part of a plurality of the first heat dissipation units and a plurality of the second heat dissipation units (125), and the first heat dissipation units and the second heat dissipation units (125) are arranged opposite to each other and spaced apart in the installation space.

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