A high-voltage electronic fan system with dual drive mode

Abstract

The present application discloses a high-voltage electronic fan system with dual drive modes, which relates to the technical field of automobile cooling systems, and includes a fan and a mechanical drive component, wherein the mechanical drive component is used to drive the fan in a mechanical drive mode. A mode switching component is used to switch the drive mode of the fan according to a preset control strategy, and the drive modes of the fan include a mechanical drive mode and an electric drive mode. The control strategy includes determining the drive mode of the fan according to the battery SOC value and the fan speed requirement. An electric drive component is used to drive the fan in an electric drive mode. The present application can determine the drive mode of the fan according to the battery SOC value and the fan speed requirement, can make full use of the recovered electricity of the hybrid vehicle, improve the flexibility of the fan control, and reduce the fuel consumption of the whole vehicle.

Description

Technical Field

[0001] The present application relates to the technical field of automobile cooling systems, and in particular to a high-voltage electronic fan system in a dual-drive mode. Background Art

[0002] The cooling system of existing hybrid commercial vehicles includes engine cooling system, drive motor cooling system, power battery thermal management system, and air conditioning system. The engine cooling system takes away the heat absorbed by the high-temperature parts of the car engine in time when it is working, so that they can work within the normal temperature range. During the driving and energy recovery process of electric vehicles, the stator core and stator winding of the motor will generate losses during the movement. These losses are dissipated outward in the form of heat, and the drive motor cooling system absorbs and takes away these heat to ensure that the motor operates safely and reliably in a stable ventilation system with balanced cold and hot cycles. The power battery generates a lot of heat during use. The battery temperature affects the operation, cycle life, charging reliability, power, energy, safety and reliability of the power system. The power battery thermal management system controls the temperature of the battery pack within a certain range, reduces the uneven temperature distribution in the battery pack to avoid imbalance between modules, reduces the battery performance decay rate, and eliminates related potential dangers. The air conditioning system of hybrid vehicles replaces the belt-driven air conditioning compressor with an electric air conditioning compressor, and the electric air conditioning compressor is driven by AC power provided by the air conditioning inverter. Even if the engine is not working, the air conditioning system can work, so it can achieve good air conditions and reduce fuel consumption.

[0003] Currently, the leading automotive design solution in the industry is the system integration solution, that is, the engine cooling system and the drive motor cooling system are integrated, sharing the engine cooling fan to achieve system cooling, and the power battery thermal management system and the air-conditioning system are integrated, sharing the compressor.

[0004] Traditional engine cooling fans usually use an electronic silicone oil clutch with a fan assembly structure. The engine is used as the driving source and the fan speed is controlled by adjusting the disengaged / engaged state of the clutch. There is only one mechanical drive mode and no other drive modes. When the system requires cooling, running the engine cooling fan will result in corresponding fuel consumption.

[0005] The existing fan driving method is single and fails to take into account the characteristics of hybrid vehicles, and cannot fully utilize the vehicle energy strategy to reduce vehicle fuel consumption. Summary of the invention

[0006] In view of the defects existing in the prior art, the purpose of this application is to provide a high-voltage electronic fan system with a dual-drive mode, which can determine the fan drive mode according to the battery SOC value and the fan speed requirement, can make full use of the recovered electricity of the hybrid vehicle, improve the flexibility of fan control, and reduce the fuel consumption of the whole vehicle.

[0007] In order to achieve the above objectives, the technical solutions adopted are:

[0008] In a first aspect, the present application provides a high-voltage electronic fan system in a dual-drive mode, the system comprising a fan and a mechanical drive component, the mechanical drive component being used to drive the fan in a mechanical drive mode; characterized in that the system further comprises:

[0009] A mode switching component, which is used to switch the drive mode of the fan according to a preset control strategy, the drive mode of the fan including a mechanical drive mode and an electric drive mode; the control strategy includes determining the drive mode of the fan according to the battery SOC value and the fan speed requirement;

[0010] The electric drive assembly is used to drive the fan in the electric drive mode.

[0011] In some embodiments, the control strategy is:

[0012] When the vehicle starts running, the mechanical drive mode is adopted;

[0013] After the vehicle starts running for a period of time, the fan driving mode is determined according to the battery SOC value and the fan speed requirement.

[0014] In some embodiments, determining the fan driving mode according to the battery SOC value and the fan speed requirement specifically includes:

[0015] When 0<battery SOC value ≤ A, mechanical drive mode is adopted;

[0016] When A<battery SOC value ≤ B, if the fan speed requirement is > n1, the mechanical drive mode is adopted; if the fan speed requirement is ≤ n1, the electric drive mode is adopted;

[0017] When B<battery SOC value≤C, if the fan speed demand>n2, the mechanical drive mode is adopted; if the fan speed demand≤n2, the electric drive mode is adopted;

[0018] When C is less than the battery SOC value, if the fan speed requirement is greater than n3, the mechanical drive mode is adopted; if the fan speed requirement is less than or equal to n3, the electric drive mode is adopted;

[0019] A, B, C, n1, n2, and n3 are all preset values, among which 0<A<B<C, 0<n1<n2<n3.

[0020] In some embodiments, the power supply of the electric drive assembly is provided by the high voltage system of the vehicle.

[0021] In some embodiments, the mechanical drive assembly uses a silicone oil fan clutch.

[0022] In some embodiments, the electric drive assembly is disposed between the fan and an output end of the silicone oil fan clutch;

[0023] In the mechanical drive mode, the silicone oil fan clutch drives the fan through the electric drive assembly.

[0024] In some embodiments, the mechanical drive assembly includes:

[0025] A drive shaft, one end of which is connected to the output end of the engine;

[0026] An active plate mounted on the end of the drive shaft away from the engine;

[0027] The clutch part has a driven plate fixedly installed in its housing, and part of the driving shaft and the active plate are installed in its housing, which is used to drive the driven plate to rotate through the rotation of the driving shaft and the active plate in the engaged state; the driven plate is connected to the fan through an electric drive component.

[0028] In some embodiments, the electric drive assembly is connected to the fan;

[0029] In mechanical drive mode, the silicone oil fan clutch directly drives the fan.

[0030] In some embodiments, the mechanical drive assembly is further used to control the speed of the fan by controlling the closing rate of the control valve plate of its internal clutch;

[0031] The electric drive assembly is also used to control the amount of electricity delivered to the fan to control the speed of the fan.

[0032] In some embodiments, the mode switching component is further used to switch the drive mode of the fan to the electric drive mode when it is determined that the mechanical drive component fails;

[0033] The mode switching component is also used to output a maintenance prompt signal when it is determined that the electric drive component fails, so as to prompt the user to manually switch the mechanical drive component and the fan to an engaged state and drive the fan through the mechanical drive component.

[0034] The beneficial effects of the technical solution provided by this application include:

[0035] The fan driving mode can be determined according to the battery SOC value and the fan speed requirement, which can make full use of the recovered electricity of the hybrid vehicle, improve the flexibility of fan control and reduce the fuel consumption of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the structure of a high-voltage electronic fan system in a dual-drive mode in an embodiment of the present invention.

[0037] Figure 2Schematic diagram of control of a high-voltage electronic fan system in dual-drive mode in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The present application is further described in detail below with reference to the accompanying drawings and embodiments.

[0039] like Figure 1 As shown, an embodiment of the present invention provides a high-voltage electronic fan system with dual drive modes, including a mode switching component, wherein the mode switching component is respectively connected to a mechanical drive component 2 and an electric drive component 3, wherein the mechanical drive component 2 is used to drive a fan 4 in a mechanical drive mode, and the electric drive component 3 is used to drive the fan 4 in an electric drive mode, and the mode switching component is used to switch the drive mode of the fan 4 according to a preset control strategy, and the drive modes of the fan 4 include a mechanical drive mode and an electric drive mode.

[0040] In this embodiment, the driving mode of the fan 4 can be determined according to the battery SOC value and the fan speed requirement, so that the recovered electricity of the hybrid vehicle can be fully utilized, the control flexibility of the fan 4 can be improved, and the fuel consumption of the whole vehicle can be reduced.

[0041] In a specific embodiment, the high-voltage electronic fan system in dual-drive mode includes a fan 4 and a mechanical drive component 2, and the mechanical drive component 2 is used to drive the fan 4 in the mechanical drive mode. The high-voltage electronic fan system in dual-drive mode adds a mode switching component and an electric drive component 3 on the basis of the existing mechanical drive mode, and the mode switching component is used to switch the drive mode of the fan 4 according to a preset control strategy. The drive mode of the fan 4 includes a mechanical drive mode and an electric drive mode. The above control strategy includes determining the drive mode of the fan 4 according to the battery SOC value and the fan speed requirement, and the electric drive component 3 is used to drive the fan 4 in the electric drive mode.

[0042] In this embodiment, the hybrid vehicle has two power source outputs, the engine 1 and the motor, wherein the motor plays an important role in the vehicle energy recovery function. As the name implies, vehicle energy recovery recovers electrical energy. The mainstream permanent magnet synchronous motor uses two magnetic fields, the first is the rotor magnetic field of the integrated permanent magnet, and the second is the magnetic field formed by the stator winding wire passing through the current. When the motor is running, the rotor magnetic field and the stator magnetic field form the same magnetic field force to drive the rotor to operate. The rotor can be understood as the power output shaft of the motor, that is, the crankshaft flywheel of the internal combustion engine 1. This driving magnetic field force can be understood as the cooperation of two force fields, while in the kinetic energy recovery state, it is the confrontation of force fields; that is, the rotor magnetic field is driven to operate by reverse force along with the vehicle transmission structure and the vehicle inertia. At this time, the stator magnetic field does not work. At this time, the rotor becomes a generator under the action of the reverse magnetic field force, and the current generated by the magnetic field force can be reversely charged into the battery pack.

[0043] The battery SOC value is related to the recovered energy of the hybrid vehicle. When the energy is recovered, the battery SOC value rises. Under different battery SOC values, according to the fan speed requirement, if the speed requirement is small, the electric drive mode is preferentially used, thereby using the recovered energy of the hybrid vehicle to drive the fan 4. If the speed requirement is large, the mechanical drive mode is preferentially used to ensure that the fan 4 can work normally and improve the working stability of the fan 4.

[0044] In a preferred embodiment, the control strategy is to use a mechanical drive mode when the vehicle is started. After the vehicle has been started for a period of time, the drive mode of the fan 4 is determined according to the battery SOC value and the fan speed requirement. The period of time is set according to actual conditions.

[0045] In this embodiment, the vehicle initially uses the mechanical drive mode to drive the fan 4. After the vehicle is started, the battery SOC value is judged with a delay. The battery SOC value is judged from low to high, and the highest logic of the battery SOC value is judged. The fan speed requirements are integrated to enter different drive modes. When there is an electric drive mode output, it is entered first. The electric drive mode is fast in and fast out, and the mechanical drive mode is fast in and slow out. When the electric drive mode fails, the high voltage is cut off, the mechanical drive mode is used, and the user is reminded to repair. If the clutch fails, it can be manually switched to the meshing state and run in the mechanical drive mode.

[0046] In a preferred embodiment, if Figure 2 As shown, the above-mentioned determination of the driving mode of the fan 4 according to the battery SOC value and the fan speed requirement specifically includes:

[0047] When 0<battery SOC value ≤ A, the mechanical drive mode is adopted.

[0048] When A<battery SOC value ≤ B, if the fan speed requirement is > n1, the mechanical drive mode is adopted; if the fan speed requirement is ≤ n1, the electric drive mode is adopted.

[0049] When B<battery SOC value ≤ C, if the fan speed demand is > n2, the mechanical drive mode is adopted; if the fan speed demand is ≤ n2, the electric drive mode is adopted.

[0050] When C is less than the battery SOC value, if the fan speed requirement is greater than n3, the mechanical drive mode is adopted; if the fan speed requirement is less than or equal to n3, the electric drive mode is adopted.

[0051] 0<A<B<C, 0<n1<n2<n3.

[0052] In this embodiment, the fan 4 driving mode is switched, and the switching of the fan 4 driving mode is realized according to the energy control strategy of the whole vehicle, combined with the battery SOC value and the fan speed requirement, wherein 0<A<B<C, 0<n1<n2<n3, A is set according to the lower limit of the whole vehicle power consumption plus a coefficient, wherein the lower limit of the state of charge of the power battery currently used in hybrid electric vehicles is fixed during the use of the vehicle, and when the battery of the vehicle is at a low SOC value and the vehicle is parked and powered off, the low SOC value of the battery may be insufficient to enable the vehicle to start normally at low temperatures due to the decrease in ambient temperature, thereby affecting the normal function of the vehicle after the next power-on. The higher the battery SOC value, the larger the speed range of the electric drive mode, and the speed range is determined according to the power consumption of the matched fan 4.

[0053] When the battery SOC value is less than or equal to A, the mechanical drive mode is adopted, and the mechanical drive component 2 is used to drive the fan 4 to rotate.

[0054] When the battery SOC value is greater than A and less than or equal to B, and lasts for t1 time, if the speed demand is greater than n1, the mechanical drive mode is adopted, and the mechanical drive component 2 is used to drive the fan 4 to rotate. If the speed demand is less than or equal to n1, the drive mode of the fan 4 is switched to the electric drive mode, and the electric drive component 3 is used to drive the fan 4 to rotate. After the fan 4 runs for a period of time, if the battery SOC value drops to less than A, the drive mode of the fan 4 is switched to the mechanical drive mode, and the mechanical drive component 2 is used to drive the fan 4 to rotate.

[0055] When the battery SOC value is greater than B and less than or equal to C, and lasts for t1 time, if the speed demand is greater than n2, the mechanical drive mode is adopted, and the mechanical drive component 2 is used to drive the fan 4 to rotate. If the speed demand is less than or equal to n2, the drive mode of the fan 4 is switched to the electric drive mode, and the electric drive component 3 is used to drive the fan 4 to rotate. After the fan 4 runs for a period of time, if the battery SOC value drops to less than B, the drive mode of the fan 4 is switched to the mechanical drive mode, and the mechanical drive component 2 is used to drive the fan 4 to rotate.

[0056] When the battery SOC value is greater than C and lasts for t1 time, if the speed demand is greater than n3, the mechanical drive mode is adopted, and the mechanical drive component 2 is used to drive the fan 4 to rotate. If the speed demand is less than or equal to n3, the drive mode of the fan 4 is switched to the electric drive mode, and the electric drive component 3 is used to drive the fan 4 to rotate. After the fan 4 runs for a period of time, if the battery SOC value drops to less than C, the drive mode of the fan 4 is switched to the mechanical drive mode, and the mechanical drive component 2 is used to drive the fan 4 to rotate.

[0057] In summary, the switching of the fan 4 driving mode is determined according to the energy control strategy of the vehicle, and the switching of the fan 4 driving mode is realized by combining the battery SOC value and the fan speed requirement, where 0<A<B<C, 0<n1<n2<n3, and A is set based on the lower limit of the vehicle's power consumption plus a coefficient. The higher the battery SOC value, the larger the speed range of the electric drive mode is, and the speed range is determined according to the power consumption of the matched fan 4.

[0058] The vehicle is initially in mechanical drive mode. After the vehicle is started, the battery SOC value is judged with a delay. According to the strategy, the battery SOC value is judged from low to high, and the highest battery SOC value is used for logical judgment (that is, when SOC is greater than B, then SOC must be greater than A, but the logic judgment is based on SOC>B to enter. Similarly, when SOC>C, the C value is judged to enter the mode based on the comprehensive speed demand). The fan speed demand is combined to enter different drive modes. When there is an electric drive mode output, it is entered first. The electric drive mode is fast in and fast out, and the mechanical drive mode is fast in and slow out. When the electric drive mode fails, the high voltage is cut off and the mechanical drive mode is used, and the user is reminded to repair. If the clutch fails, it can be manually switched to the meshing state and run in the mechanical drive mode.

[0059] The high-voltage electronic fan system in dual-drive mode is a system designed with two modes integrated, namely mechanical drive and high-voltage electric drive. The electronic fan 4 assembly can switch between the two drive modes according to the control of the vehicle energy and system strategy, achieving the optimal control strategy for the energy utilization of the vehicle. The system is highly integrated, and the energy recovered by the vehicle hybrid system can be applied to the drive of the fan 4 assembly through the high-voltage electric drive mode to achieve energy recycling. The assembly space utilization is high, which has a leading advantage in the industry.

[0060] In a preferred embodiment, the power supply of the electric drive assembly 3 is provided by the high voltage system of the vehicle.

[0061] In this embodiment, on the electric vehicle, the high-voltage components include power batteries, drive motors, high-voltage distribution boxes, electric compressors, DC / DC, on-board chargers, car heaters, high-voltage wiring harnesses, etc. These components constitute the high-voltage system of the vehicle.

[0062] The high voltage of the vehicle's high voltage system supplies power to each component through the high voltage distribution box. In this solution, the vehicle has one high voltage supply to the electric drive part.

[0063] In a preferred embodiment, the mechanical drive assembly 2 integrates the function of a silicone oil fan clutch.

[0064] In one embodiment, the electric drive assembly 3 is disposed between the fan 4 and the output end of the silicone oil fan clutch. In the mechanical drive mode, the silicone oil fan clutch drives the fan 4 through the mechanical drive assembly 2.

[0065] In another embodiment, the electric drive assembly 3 is connected to the fan 4. In the mechanical drive mode, the silicone oil fan clutch directly drives the fan 4.

[0066] Further, in the first embodiment, the mechanical drive assembly 2 includes a drive shaft, an active plate, and a clutch part. One end of the drive shaft is connected to the output end of the engine 1. The active plate is installed at the end of the drive shaft away from the engine 1. A driven plate is fixedly installed in the housing of the clutch part, and part of the drive shaft and the active plate are installed in the housing thereof, and are used to drive the driven plate to rotate through the rotation of the drive shaft and the active plate in the engaged state. The driven plate is connected to the fan 4 through the electric drive assembly 3.

[0067] In this embodiment, the silicone oil fan clutch uses silicone oil as a medium and utilizes the shear viscosity of silicone oil to transmit torque. The speed of the fan 4 is designed to ensure that the engine 1 does not overheat under the worst use conditions. Therefore, during normal driving of the vehicle, the speed of the fan 4 should be controlled within an appropriate range to reduce noise and improve the economy of the engine 1. For the fan 4 driven by the engine 1, the fan 4 clutch is usually used to control its speed. The clutch is sealed with a viscous fluid (silicone oil) that transmits torque by its shear viscosity.

[0068] A common clutch adopts an electronically controlled silicone oil clutch structure, including a front cover, an active plate, a separate plate, a valve control rod, a bimetallic plate, a control pin, a sealing ring, a rear cover, a bearing, and a flange shaft. The clutch valve plate controls the movement of the valve plate by controlling the magnetic force of the main shaft through an electronically controlled spiral tube, thereby realizing the speed control of the fan 4.

[0069] In a preferred embodiment, the mechanical drive assembly 2 is also used to control the rotation speed of the fan 4 by controlling the closing rate of the control valve plate of its internal clutch.

[0070] The electric drive assembly 3 is also used to control the amount of electricity supplied to the fan 4 to control the speed of the fan 4 .

[0071] In this embodiment, in the mechanical drive mode, the speed control of the fan 4 can be achieved by controlling the closing times of the valve plate in a unit time.

[0072] In the electric drive mode, the rotation speed of the fan 4 can be controlled by controlling the output power.

[0073] In a preferred embodiment, the mode switching component is also used to switch the driving mode of the fan 4 to the electric driving mode when it is determined that the mechanical driving component 2 fails.

[0074] The mode switching component is also used to output a maintenance prompt signal when it is determined that the electric drive component 3 fails, so as to prompt the user to manually switch the mechanical drive component 2 and the fan 4 to an engaged state, and drive the fan 4 through the mechanical drive component 2.

[0075] In this embodiment, when there is an electric drive mode output, it is entered first; the electric drive mode is fast in and fast out, and the mechanical drive mode is fast in and slow out. When the electric drive mode fails, the high voltage is cut off, the mechanical drive mode is used, and the user is reminded to repair. If the clutch fails, it can be manually switched to the meshing state and run in the mechanical drive mode.

[0076] In summary, the cooling system of existing hybrid commercial vehicles uses an electronic silicone oil clutch with fan 4 assembly, with engine 1 as the driving source, and the speed control of fan 4 is achieved by adjusting the clutch, and fan 4 has no other driving mode. As long as fan 4 is running, it will cause fuel consumption. Hybrid vehicles have energy recovery working condition strategies. If the recovered energy is not used and the battery SOC value is high, energy recovery cannot be performed. If the recovered energy can be used in power consumption parts (such as fan 4), the fuel consumption of the whole vehicle can be further reduced.

[0077] This system combines the characteristics of hybrid vehicles and fully utilizes the energy strategy of the entire vehicle, which can effectively reduce the fuel consumption of the entire vehicle.

[0078] In a specific embodiment, a dual-drive mode high-voltage electronic fan 4 control method is also provided. The method adds a mode switching component and an electric drive component 3 on the basis of the existing mechanical drive mode. The mode switching component is used to switch the drive mode of the fan 4 according to a preset control strategy. The drive mode of the fan 4 includes a mechanical drive mode and an electric drive mode. The above-mentioned control strategy includes determining the drive mode of the fan 4 according to the battery SOC value and the fan speed requirement. The electric drive component 3 is used to drive the fan 4 in the electric drive mode.

[0079] In this embodiment, the driving mode of the fan 4 can be determined according to the battery SOC value and the fan speed requirement, so that the recovered electricity of the hybrid vehicle can be fully utilized, the control flexibility of the fan 4 can be improved, and the fuel consumption of the whole vehicle can be reduced.

[0080] The battery SOC value is related to the recovered energy of the hybrid vehicle. When the energy is recovered, the battery SOC value rises. Under different battery SOC values, according to the fan speed requirement, if the speed requirement is small, the electric drive mode is preferentially used, thereby using the recovered energy of the hybrid vehicle to drive the fan 4. If the speed requirement is large, the mechanical drive mode is preferentially used to ensure that the fan 4 can work normally and improve the working stability of the fan 4.

[0081] Furthermore, the vehicle initially uses the mechanical drive mode to drive the fan 4. After the vehicle is started, the battery SOC value is judged with a delay. The battery SOC value is judged from low to high, and the highest battery SOC value is judged logically. The fan speed requirements are integrated to enter different drive modes. When there is an electric drive mode output, it is entered first. The electric drive mode is fast in and fast out, and the mechanical drive mode is fast in and slow out. When the electric drive mode fails, the high voltage is cut off, the mechanical drive mode is used, and the user is reminded to repair. If the clutch fails, it can be manually switched to the meshing state and run in the mechanical drive mode.

[0082] The above control strategy is to use the mechanical drive mode when the vehicle is started and operated. After the vehicle has been started and operated for a period of time, the drive mode of the fan 4 is determined according to the battery SOC value and the fan speed requirement.

[0083] In this embodiment, the vehicle initially uses the mechanical drive mode to drive the fan 4. After the vehicle is started, the battery SOC value is judged with a delay. The battery SOC value is judged from low to high, and the highest logic of the battery SOC value is judged. The fan speed requirements are integrated to enter different drive modes. When there is an electric drive mode output, it is entered first. The electric drive mode is fast in and fast out, and the mechanical drive mode is fast in and slow out. When the electric drive mode fails, the high voltage is cut off, the mechanical drive mode is used, and the user is reminded to repair. If the clutch fails, it can be manually switched to the meshing state and run in the mechanical drive mode.

[0084] Furthermore, the above-mentioned determination of the driving mode of the fan 4 according to the battery SOC value and the fan speed requirement specifically includes:

[0085] When 0<battery SOC value ≤ A, the mechanical drive mode is adopted.

[0086] When A<battery SOC value ≤ B, if the fan speed requirement is > n1, the mechanical drive mode is adopted; if the fan speed requirement is ≤ n1, the electric drive mode is adopted.

[0087] When B<battery SOC value ≤ C, if the fan speed demand is > n2, the mechanical drive mode is adopted; if the fan speed demand is ≤ n2, the electric drive mode is adopted.

[0088] When C is less than the battery SOC value, if the fan speed requirement is greater than n3, the mechanical drive mode is adopted; if the fan speed requirement is less than or equal to n3, the electric drive mode is adopted.

[0089] 0<A<B<C, 0<n1<n2<n3.

[0090] In this embodiment, the fan 4 driving mode is switched, and the switching of the fan 4 driving mode is realized according to the energy control strategy of the whole vehicle, combined with the battery SOC value and the fan speed requirement, wherein 0<A<B<C, 0<n1<n2<n3, A is set according to the lower limit of the whole vehicle power consumption plus a coefficient, wherein the lower limit of the state of charge of the power battery currently used in hybrid electric vehicles is fixed during the use of the vehicle, and when the battery of the vehicle is at a low SOC value and the vehicle is parked and powered off, the low SOC value of the battery may be insufficient to enable the vehicle to start normally at low temperatures due to the decrease in ambient temperature, thereby affecting the normal function of the vehicle after the next power-on. The higher the battery SOC value, the larger the speed range of the electric drive mode, and the speed range is determined according to the power consumption of the matched fan 4.

[0091] When the battery SOC value is less than or equal to A, the mechanical drive mode is adopted, and the mechanical drive component 2 is used to drive the fan 4 to rotate.

[0092] When the battery SOC value is greater than A and less than or equal to B, and lasts for t1 time, if the speed demand is greater than n1, the mechanical drive mode is adopted, and the mechanical drive component 2 is used to drive the fan 4 to rotate. If the speed demand is less than or equal to n1, the drive mode of the fan 4 is switched to the electric drive mode, and the electric drive component 3 is used to drive the fan 4 to rotate. After the fan 4 runs for a period of time, if the battery SOC value drops to less than A, the drive mode of the fan 4 is switched to the mechanical drive mode, and the mechanical drive component 2 is used to drive the fan 4 to rotate.

[0093] When the battery SOC value is greater than B and less than or equal to C, and lasts for t1 time, if the speed demand is greater than n2, the mechanical drive mode is adopted, and the mechanical drive component 2 is used to drive the fan 4 to rotate. If the speed demand is less than or equal to n2, the drive mode of the fan 4 is switched to the electric drive mode, and the electric drive component 3 is used to drive the fan 4 to rotate. After the fan 4 runs for a period of time, if the battery SOC value drops to less than B, the drive mode of the fan 4 is switched to the mechanical drive mode, and the mechanical drive component 2 is used to drive the fan 4 to rotate.

[0094] When the battery SOC value is greater than C and lasts for t1 time, if the speed demand is greater than n3, the mechanical drive mode is adopted, and the mechanical drive component 2 is used to drive the fan 4 to rotate. If the speed demand is less than or equal to n3, the drive mode of the fan 4 is switched to the electric drive mode, and the electric drive component 3 is used to drive the fan 4 to rotate. After the fan 4 runs for a period of time, if the battery SOC value drops to less than C, the drive mode of the fan 4 is switched to the mechanical drive mode, and the mechanical drive component 2 is used to drive the fan 4 to rotate.

[0095] In summary, the switching of the fan 4 driving mode is determined according to the energy control strategy of the vehicle, and the switching of the fan 4 driving mode is realized by combining the battery SOC value and the fan speed requirement, where 0<A<B<C, 0<n1<n2<n3, and A is set based on the lower limit of the vehicle's power consumption plus a coefficient. The higher the battery SOC value, the larger the speed range of the electric drive mode is, and the speed range is determined according to the power consumption of the matched fan 4.

[0096] The vehicle is initially in mechanical drive mode. After the vehicle is started, the battery SOC value is judged with a delay. According to the strategy, the battery SOC value is judged from low to high, and the highest battery SOC value is used for logical judgment (that is, when SOC is greater than B, then SOC must be greater than A, but the logic judgment is based on SOC>B to enter. Similarly, when SOC>C, the C value is judged to enter the mode based on the comprehensive speed demand). The fan speed demand is combined to enter different drive modes. When there is an electric drive mode output, it is entered first. The electric drive mode is fast in and fast out, and the mechanical drive mode is fast in and slow out. When the electric drive mode fails, the high voltage is cut off and the mechanical drive mode is used, and the user is reminded to repair. If the clutch fails, it can be manually switched to the meshing state and run in the mechanical drive mode.

[0097] The high-voltage electronic fan system in dual-drive mode is a system designed with two modes integrated, namely mechanical drive and high-voltage electric drive. The electronic fan 4 assembly can switch between the two drive modes according to the control of the vehicle energy and system strategy, achieving the optimal control strategy for the energy utilization of the vehicle. The system is highly integrated, and the energy recovered by the vehicle hybrid system can be applied to the drive of the fan 4 assembly through the high-voltage electric drive mode to achieve energy recycling. The assembly space utilization is high, which has a leading advantage in the industry.

[0098] Furthermore, the power supply of the electric drive assembly 3 is provided by the high voltage system of the whole vehicle.

[0099] In this embodiment, on the electric vehicle, the high-voltage components include power batteries, drive motors, high-voltage distribution boxes, electric compressors, DC / DC, on-board chargers, car heaters, high-voltage wiring harnesses, etc. These components constitute the high-voltage system of the vehicle.

[0100] The high voltage of the vehicle's high voltage system supplies power to each component through the high voltage distribution box. In this solution, the vehicle has one high voltage supply to the electric drive part.

[0101] Furthermore, the mechanical drive assembly 2 is integrated with a silicone oil fan clutch function.

[0102] In one embodiment, the electric drive assembly 3 is disposed between the fan 4 and the output end of the silicone oil fan clutch. In the mechanical drive mode, the silicone oil fan clutch drives the fan 4 through the mechanical drive assembly 2.

[0103] In another embodiment, the electric drive assembly 3 is connected to the fan 4. In the mechanical drive mode, the silicone oil fan clutch directly drives the fan 4.

[0104] The mechanical drive assembly 2 includes a drive shaft, an active plate, and a clutch part. One end of the drive shaft is connected to the output end of the engine 1. The active plate is installed at the end of the drive shaft away from the engine 1. A driven plate is fixedly installed in the housing of the clutch part, and part of the drive shaft and the active plate are installed in its housing, which is used to drive the driven plate to rotate through the rotation of the drive shaft and the active plate in the engaged state. The driven plate is connected to the fan 4 through the electric drive assembly 3.

[0105] The control method of this embodiment is applicable to the above-mentioned control systems.

[0106] The present application is not limited to the above-mentioned implementation modes. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A dual-drive mode high-voltage electronic fan system, the system comprising a fan and a mechanical drive assembly, the mechanical drive assembly being used to drive the fan in a mechanical drive mode; characterized in that: The system further comprises: A mode switching component, which is used to switch the drive mode of the fan according to a preset control strategy, the drive mode of the fan including a mechanical drive mode and an electric drive mode; the control strategy includes determining the drive mode of the fan according to the battery SOC value and the fan speed requirement; An electric drive assembly for driving the fan in an electric drive mode; The mechanical drive assembly adopts a silicone oil fan clutch; The electric drive assembly is arranged between the fan and the output end of the silicone oil fan clutch; in the mechanical drive mode, the silicone oil fan clutch drives the fan through the electric drive assembly; The mechanical drive assembly comprises: a drive shaft, one end of which is connected to the output end of the engine; an active plate, which is installed at the end of the drive shaft away from the engine; a clutch part, in which a driven plate is fixedly installed in the housing, and the drive shaft and the active plate are installed in the housing, and are used to drive the driven plate to rotate through the rotation of the drive shaft and the active plate in the engaged state; the driven plate is connected to the fan through the electric drive assembly; The electric drive assembly is connected to the fan; in the mechanical drive mode, the silicone oil fan clutch directly drives the fan.

2. The dual-drive mode high-voltage electronic fan system according to claim 1, characterized in that: The control strategy is: When the vehicle starts running, the mechanical drive mode is adopted; After the vehicle starts running for a period of time, the fan driving mode is determined according to the battery SOC value and the fan speed requirement.

3. The dual-drive mode high-voltage electronic fan system according to claim 1, characterized in that: The fan driving mode is determined according to the battery SOC value and the fan speed requirement, specifically including: When 0<battery SOC value ≤ A, mechanical drive mode is adopted; When A<battery SOC value ≤ B, if the fan speed requirement is > n1, the mechanical drive mode is adopted; if the fan speed requirement is ≤ n1, the electric drive mode is adopted; When B<battery SOC value≤C, if the fan speed demand>n2, the mechanical drive mode is adopted; if the fan speed demand≤n2, the electric drive mode is adopted; When C is less than the battery SOC value, if the fan speed requirement is greater than n3, the mechanical drive mode is adopted; if the fan speed requirement is less than or equal to n3, the electric drive mode is adopted; A, B, C, n1, n2, and n3 are all preset values, among which 0<A<B<C, 0<n1<n2<n3.

4. The dual-drive mode high-voltage electronic fan system according to claim 1, characterized in that: The power supply of the electric drive assembly is provided by the high voltage system of the whole vehicle.

5. The dual-drive mode high-voltage electronic fan system according to claim 1, characterized in that: The mechanical drive assembly is also used to control the speed of the fan by controlling the closing rate of the control valve plate of its internal clutch; The electric drive assembly is also used to control the amount of electricity delivered to the fan to control the speed of the fan.

6. The dual-drive mode high-voltage electronic fan system according to claim 1, characterized in that: The mode switching component is also used to switch the drive mode of the fan to the electric drive mode when it is determined that the mechanical drive component fails; The mode switching component is also used to output a maintenance prompt signal when it is determined that the electric drive component fails, so as to prompt the user to manually switch the mechanical drive component and the fan to an engaged state, and drive the fan through the mechanical drive component.

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