Control method and device of hybrid power system and vehicle

Abstract

The invention provides a control method and device of a hybrid power system and a vehicle. The method comprises the steps that when the vehicle is started, the hydrogen internal combustion engine is controlled to be started to provide driving force for the vehicle; when the electric quantity of the super capacitor is larger than a first preset value in the running process of the vehicle, the required power of the vehicle is obtained; and according to the required power of the vehicle, starting and stopping of the fuel cell, the hydrogen internal combustion engine and the super capacitor are controlled, and driving force is provided for the vehicle. The problems that in the prior art, a fuel cell vehicle is long in starting time and even cannot be started correctly, efficiency is low, and hydrogen consumption is high can be solved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a control method and device for a hybrid power system and a vehicle. Background Art

[0002] The fuel cell system is a device that generates electricity through electrochemical reactions between air and hydrogen. Because of its high efficiency and pollution-free nature, it is one of the important development directions for future new energy vehicle engines. In existing hydrogen-powered vehicles, fuel cells are usually used in parallel with lithium batteries to meet the power needs of hydrogen-powered vehicles. Fuel cells, as power generation units, are only responsible for power generation; lithium batteries, as power storage units, can output or store electricity.

[0003] However, existing fuel cells are limited by their own characteristics and have the following problems:

[0004] 1. When the fuel cell is started at low temperature, the lithium battery power needs to be consumed to heat up the fuel cell system, but the battery discharge capacity is limited at low temperatures, resulting in a long vehicle start time, which cannot meet actual vehicle use needs. Or when the battery SOC is too low, the vehicle cannot start and must be charged before it can start normally.

[0005] 2. Its efficiency gradually decreases with the increase of power. As a result, when used on high-speed and heavy-loaded vehicles, when the vehicle requires high power, the efficiency of the fuel cell will continue to be low, resulting in high hydrogen consumption and increased vehicle use costs. Summary of the invention

[0006] The embodiments of the present invention provide a control method, device and vehicle of a hybrid power system to solve the problems in the prior art that fuel cell vehicles have a long start-up time or even cannot start correctly, have low efficiency and high hydrogen consumption.

[0007] In a first aspect, an embodiment of the present invention provides a control method for a hybrid power system, wherein the hybrid power system includes a fuel cell, a hydrogen internal combustion engine, and a supercapacitor, and the control method for the hybrid power system includes:

[0008] When the vehicle starts, controlling the hydrogen internal combustion engine to start and provide driving force for the vehicle;

[0009] When the power of the supercapacitor is greater than a first preset value during the operation of the vehicle, the required power of the vehicle is obtained;

[0010] According to the power demand of the vehicle, the start and stop of the fuel cell, the hydrogen internal combustion engine and the super capacitor are controlled to provide driving force for the vehicle.

[0011] In a possible implementation, after controlling the hydrogen internal combustion engine to start and provide driving force for the vehicle, the method further includes:

[0012] The generator is controlled to start and charge the super capacitor.

[0013] In a possible implementation, controlling the start and stop of the fuel cell, the hydrogen internal combustion engine, and the supercapacitor according to the required power of the vehicle includes:

[0014] When the vehicle's required power is less than a first preset power, the hydrogen internal combustion engine is controlled to stop, and the fuel cell, or the fuel cell and the super capacitor are controlled to output power to provide electrical energy for the vehicle;

[0015] When the vehicle demand power is greater than or equal to the first preset power, the fuel cell is controlled to be turned off, and the hydrogen internal combustion engine is controlled to start to provide driving force for the vehicle.

[0016] In a possible implementation, when the vehicle demand power is less than a first preset power, the hydrogen internal combustion engine is controlled to stop, and the fuel cell, or the fuel cell and the supercapacitor are controlled to output power to provide electrical energy for the vehicle, including:

[0017] When the vehicle's required power is less than a second preset power, the hydrogen internal combustion engine is controlled to stop, and the fuel cell is controlled to start, so that the supercapacitor provides electrical energy to the vehicle;

[0018] When the vehicle demand power is greater than or equal to the second preset power and less than the first preset power, the fuel cell and the super capacitor are controlled to output power simultaneously to provide electrical energy for the vehicle.

[0019] In a possible implementation, controlling the fuel cell to start up includes:

[0020] The supercapacitor is controlled to supply power to the fuel cell, and the fuel cell is started.

[0021] In a possible implementation, after controlling the fuel cell and the supercapacitor to simultaneously output power to provide electrical energy for the vehicle, the method further includes:

[0022] Detecting whether the power level of the supercapacitor is less than a second preset value, where the second preset value is less than the first preset value;

[0023] When the power level of the supercapacitor is less than the second preset value, the fuel cell is controlled to be turned off, and the hydrogen internal combustion engine is controlled to start to provide driving force for the vehicle.

[0024] In a possible implementation, after controlling the fuel cell to shut down and controlling the hydrogen internal combustion engine to start to provide driving force for the vehicle, the method further includes:

[0025] Detecting whether the power level of the supercapacitor is less than a first preset value;

[0026] When the power of the supercapacitor is less than the first preset value, controlling the generator to start to charge the supercapacitor;

[0027] When the electric quantity of the super capacitor is not less than the first preset value, the generator is kept in an off state or controlled to be off.

[0028] In a possible implementation, the hydrogen internal combustion engine and the fuel cell share an air compressor, and a first throttle valve is connected between the air compressor and the hydrogen internal combustion engine, and a second throttle valve is connected between the air compressor and the fuel cell;

[0029] Before controlling the hydrogen internal combustion engine to start, or before controlling the fuel cell to shut down and controlling the hydrogen internal combustion engine to start, the method further includes:

[0030] Controlling the first throttle valve to open and the second throttle valve to close;

[0031] Before controlling the hydrogen internal combustion engine to stop and controlling the fuel cell to start, the method further includes:

[0032] The second throttle valve is controlled to be opened and the first throttle valve is controlled to be closed.

[0033] In a second aspect, an embodiment of the present invention provides a control device for a hybrid power system, comprising:

[0034] A control module, used for controlling the hydrogen internal combustion engine to start and provide driving force for the vehicle when the vehicle starts;

[0035] An acquisition module, used for acquiring the vehicle required power when the power of the supercapacitor is greater than a first preset value during the operation of the vehicle;

[0036] The control module is also used to control the start and stop of the fuel cell, the hydrogen internal combustion engine and the super capacitor according to the power demand of the vehicle to provide driving force for the vehicle.

[0037] In a third aspect, an embodiment of the present invention provides a vehicle, comprising a controller, wherein the controller comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the control method of the hybrid power system as described in the first aspect or any possible implementation method of the first aspect are implemented.

[0038] The embodiment of the present invention provides a control method, device and vehicle of a hybrid power system. When the vehicle is started, the hydrogen internal combustion engine is controlled to start to provide driving force for the vehicle, thereby avoiding the problem of long starting time or even failure to start due to low temperature when starting with a fuel cell. When the power of a supercapacitor is greater than a first preset value during vehicle operation, the vehicle's required power is obtained, and according to the vehicle's required power, the start and stop of the fuel cell, the hydrogen internal combustion engine and the supercapacitor are controlled to provide driving force for the vehicle, thereby making the vehicle always in an efficient working range, improving the working efficiency of the vehicle, and effectively reducing the hydrogen consumption of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 is a flow chart of a control method for a hybrid power system provided by an embodiment of the present invention;

[0041] Figure 2 is a schematic diagram of a hybrid power system provided by an embodiment of the present invention;

[0042] Figure 3 is a schematic diagram of a hybrid power system provided by another embodiment of the present invention;

[0043] Figure 4 is a flow chart of a control method for a hybrid power system provided by another embodiment of the present invention;

[0044] Figure 5 is a schematic structural diagram of a control device for a hybrid power system provided by an embodiment of the present invention;

[0045] Figure 6 is a schematic diagram of a controller provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0046] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0047] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below in conjunction with the accompanying drawings.

[0048] Figure 1 A control method for a hybrid power system according to an embodiment of the present invention is provided as a flowchart. Figure 2 The hybrid system schematic diagram shown includes a fuel cell, a hydrogen internal combustion engine and a supercapacitor. The hybrid system is described in detail as follows:

[0049] The output end of the hydrogen storage system is connected to the gas input port of the hydrogen internal combustion engine and the gas input port of the fuel cell respectively. The output end of the hydrogen internal combustion engine is connected to the input end of the generator and is mechanically connected to the transmission component; the output end of the generator is connected to the high-voltage bus. The output end of the fuel cell is connected to the input end of the first DCDC converter through a high-voltage wire, and the output end of the first DCDC converter is connected to the high-voltage bus. The output end of the supercapacitor is connected to the input end of the second DCDC converter through a high-voltage wire, and the output end of the second DCDC converter is connected to the high-voltage bus. The high-voltage bus is connected to the input end of the motor; the output end of the motor is mechanically connected to the gearbox through a clutch to convert electrical energy into kinetic energy to drive the vehicle;

[0050] The output end of the motor is connected to the input end of the second DCDC converter through the high-voltage bus, and the output end of the second DCDC converter is connected to the input end of the super capacitor.

[0051] The output end of the hydrogen internal combustion engine assembly is also connected to a clutch, and the clutch is mechanically connected to the gearbox.

[0052] See also Figure 3 As shown, a heat exchanger is arranged between the hydrogen internal combustion engine and the fuel cell, so that the heat generated by the hydrogen internal combustion engine can be supplied to the fuel cell through the heat exchanger, and the heat of the fuel cell can be dissipated by the thermal management system of the hydrogen internal combustion engine through the heat exchanger.

[0053] The hydrogen internal combustion engine and the fuel cell share one air compressor. Figure 3 In the method, air is input to the input end of the air filter, and the output end of the air filter is connected to the input end of the air compressor through the ventilation pipe; the output end of the air compressor is respectively connected to the input end of the first throttle valve and the input end of the second throttle valve, the output end of the first throttle valve is connected to the input end of the first flow meter, and the output end of the first flow meter is connected to the hydrogen internal combustion engine; the output end of the second throttle valve is connected to the input end of the second flow meter, and the output end of the second flow meter is connected to the fuel cell.

[0054] Figure 3In the method, the hydrogen storage system includes a hydrogen cylinder, a first-stage pressure reducer, a second-stage first pressure reducer and a second-stage second pressure reducer; the output end of the hydrogen cylinder is connected to the input end of the first-stage pressure reducer through a ventilation pipe, the output end of the first-stage pressure reducer is respectively connected to the input end of the second-stage first pressure reducer and the input end of the second-stage second pressure reducer through the ventilation pipe, the output end of the second-stage first pressure reducer is connected to the hydrogen internal combustion engine through the ventilation pipe, and the output end of the second-stage second pressure reducer is connected to the fuel cell through the ventilation pipe.

[0055] Figure 3 The invention also includes a multi-stage silencer, the input end of the silencer is connected to the hydrogen internal combustion engine and the fuel cell respectively; the output end of the silencer is output to the air.

[0056] Using the above hybrid power system, the execution subject of the control method of the hybrid power system can be a vehicle control unit (VCU), which is described in detail as follows:

[0057] Step 101, when the vehicle starts, the hydrogen internal combustion engine is controlled to start to provide driving force for the vehicle.

[0058] Hydrogen internal combustion engine: refers to an internal combustion engine that uses hydrogen as fuel. It drives the piston to reciprocate by mixing hydrogen and air and burning them. The piston pushes the connecting rod, and the connecting rod drives the crankshaft to rotate, thereby outputting rotational power.

[0059] See also Figure 3 As shown, the hydrogen internal combustion engine and the fuel cell share an air compressor, and the first throttle valve is connected between the air compressor and the hydrogen internal combustion engine, and the second throttle valve is connected between the air compressor and the fuel cell.

[0060] See also Figure 4 Before controlling the hydrogen internal combustion engine to start, the first throttle valve is controlled to be opened and the second throttle valve is closed, so that the air is filtered by the air filter, compressed by the air compressor, and flows into the hydrogen internal combustion engine through the first throttle valve.

[0061] Both hydrogen internal combustion engines and fuel cells require air filtration, so they can share one air filter to save vehicle cost and space. Since the air input to hydrogen internal combustion engines and fuel cells requires a certain pressure, sharing one air compressor for air compression can effectively reduce overall cost and layout space.

[0062] In the prior art, when a fuel cell is used to start a vehicle, low-temperature starting requires consumption of lithium battery power to heat up the fuel cell, but the battery discharge capacity is limited at low temperatures, resulting in a long vehicle start time, which cannot meet actual vehicle use needs, or when the lithium battery power is too low, the vehicle cannot start and must be charged before it can start normally. In this embodiment, during the vehicle start-up phase, the hydrogen internal combustion engine works first to provide power for the vehicle, which can solve the problem of long start-up time of fuel cell vehicles in the prior art.

[0063] In one embodiment, after controlling the hydrogen internal combustion engine to start to provide driving force for the vehicle, the method may further include: controlling the generator to start and charging the super capacitor.

[0064] Supercapacitors can store electrical energy and discharge at high power, but their power decay rate is much faster than that of lithium batteries. Therefore, after long-term parking, the supercapacitor may be insufficient. In this embodiment, in order to prevent the supercapacitor from being insufficient and causing the fuel cell to fail to start after the vehicle is running, when the vehicle is started by the hydrogen internal combustion engine, the generator is controlled to charge the supercapacitor at the same time.

[0065] After the generator is started, it generates electricity and stores the electric energy in the supercapacitor through the high-voltage bus. Optionally, the high-voltage bus charges the supercapacitor after the AC power generated by the generator passes through the second DCDC converter to ensure that the voltage of the supercapacitor is the same as the vehicle voltage, thereby solving the problem of fast attenuation of the supercapacitor.

[0066] Step 102: when the power of the supercapacitor reaches a first preset value during the operation of the vehicle, the required power of the vehicle is obtained.

[0067] Fuel cells are power generation units that can directly convert the chemical energy of hydrogen and oxygen into electrical energy. The basic principle is the reverse reaction of water electrolysis, where hydrogen and oxygen (air) are supplied to the anode and cathode respectively. After hydrogen diffuses outward through the anode and reacts with the electrolyte, it releases electrons and reaches the cathode through the external load. Due to the high efficiency and pollution-free nature of fuel cells, during the operation of a vehicle, fuel cells can be used to generate electricity to provide the vehicle with electrical energy, which is then converted into mechanical energy by the motor to drive the vehicle.

[0068] The fuel cell needs to consume electricity during the startup phase, that is, the supercapacitor and the fuel cell need to cooperate to start the fuel cell. Therefore, it is necessary to ensure that the power of the supercapacitor reaches a first preset value before the fuel cell can be started. Here, the first preset value can be a power value set according to actual needs, which is the minimum value to maintain the operation of the fuel cell. In this embodiment, the specific value of the first preset value is not limited.

[0069] Acquiring the vehicle required power may include: acquiring the depth of the accelerator pedal, and determining the corresponding power requirement according to the depth of the accelerator pedal. The deeper the depth of the accelerator pedal, the greater the vehicle required power.

[0070] Step 103, according to the power demand of the vehicle, control the start and stop of the fuel cell, the hydrogen internal combustion engine and the super capacitor to provide driving force for the vehicle.

[0071] In order to ensure that the vehicle is always in an efficient working range, after the vehicle is started, the start and stop of the fuel cell, hydrogen internal combustion engine and supercapacitor are allocated according to the vehicle's required power.

[0072] In step 102, it is analyzed that during the operation of the vehicle, in order to improve the operating efficiency of the vehicle, a fuel cell can be used to generate electricity to provide electrical energy, which is then converted into mechanical energy by the motor to drive the vehicle. Therefore, in this embodiment, when the vehicle power demand is less than the rated power of the fuel cell, a fuel cell can be used, or the fuel cell and supercapacitor output power can be used to drive the vehicle at the same time. When the vehicle power demand is greater than the rated power of the fuel cell, the fuel cell cannot supply enough electrical energy to the vehicle, so it switches to the hydrogen internal combustion engine to start and provide driving force for the vehicle. According to different vehicle states, efficient components can be automatically selected to provide power for the vehicle, effectively reducing the hydrogen consumption of the whole vehicle.

[0073] In one embodiment, according to the vehicle's required power, controlling the start and stop of the fuel cell, the hydrogen internal combustion engine, and the supercapacitor may include:

[0074] When the vehicle's required power is less than a first preset power, the hydrogen internal combustion engine is controlled to shut down, and the fuel cell, or the fuel cell and the supercapacitor are controlled to output power to provide electrical energy for the vehicle;

[0075] When the vehicle's required power is greater than or equal to a first preset power, the fuel cell is controlled to be turned off, and the hydrogen internal combustion engine is controlled to be started to provide driving force for the vehicle.

[0076] Here, the first preset power may be the rated power of the fuel cell. The rated powers of different fuel cells may be different. In this embodiment, the actual value of the first preset power is not limited.

[0077] It should be noted that when the vehicle's required power is greater than or equal to the first preset power, the fuel cell is controlled to be shut down and the hydrogen internal combustion engine is controlled to start to provide driving force for the vehicle. The vehicle's required power is obtained in real time, and according to the vehicle's required power, the start and stop of the fuel cell, the hydrogen internal combustion engine and the supercapacitor are controlled to provide driving force for the vehicle.

[0078] Optionally, when the vehicle's required power is less than the rated power of the fuel cell, it can be determined whether the fuel cell is the main power output object, or whether the fuel cell and supercapacitor output power at the same time, based on the specific vehicle's required power. This can avoid the problem of high power output of the fuel cell and rapid life decay, and increase the life of the fuel cell.

[0079] In one embodiment, when the vehicle demand power is less than the first preset power, the hydrogen internal combustion engine is controlled to stop, and the fuel cell, or the fuel cell and the super capacitor are controlled to output power to provide electrical energy for the vehicle, which may include:

[0080] When the vehicle's required power is less than the second preset power, the hydrogen internal combustion engine is controlled to stop, and the fuel cell is controlled to start, so as to provide electric energy to the vehicle through the supercapacitor;

[0081] When the vehicle's required power is greater than or equal to the second preset power and less than the first preset power, the fuel cell and the supercapacitor are controlled to output power simultaneously to provide electrical energy for the vehicle.

[0082] Optionally, the second preset power is less than the first preset power, that is, the second preset power is less than the rated power of the fuel cell. In this embodiment, the second preset power can be set according to actual needs, and different vehicle models can set different second preset powers. For example, the second preset power can be 80% of the rated power of the fuel cell.

[0083] That is to say, when the vehicle's required power is less than 80% of the rated power of the fuel cell, the fuel cell can be used as the main power output object, and the supercapacitor can be used in conjunction, that is, the supercapacitor needs to provide power to start the fuel cell. After the fuel cell is started, the generated electricity is converted into mechanical energy by the motor to drive the vehicle. Therefore, controlling the start of the fuel cell can include: controlling the supercapacitor to power the fuel cell and starting the fuel cell.

[0084] After the fuel cell is started, if the vehicle's required power continues to be less than 80% of the fuel cell's rated power, the fuel cell will be the main power output object, and the supercapacitor will cooperate.

[0085] In one embodiment, before controlling the hydrogen internal combustion engine to stop and controlling the fuel cell to start, the following steps may also be included:

[0086] The second throttle valve is controlled to be opened and the first throttle valve is controlled to be closed, so that air flows into the fuel cell through the second throttle valve to provide the air necessary for starting the fuel cell.

[0087] If the vehicle's required power is continuously greater than 80% of the fuel cell's rated power and less than the fuel cell's rated power, and the electricity generated by the fuel cell is insufficient to drive the vehicle, the fuel cell and supercapacitor can simultaneously output power to provide electrical energy for the vehicle. At this time, the power output of the supercapacitor and the electricity generated by the fuel cell are simultaneously converted into mechanical energy by the motor to drive the vehicle.

[0088] During the process of the fuel cell and the super capacitor outputting power at the same time, the power of the super capacitor decreases. At this time, it is necessary to switch to the hydrogen internal combustion engine according to the power of the super capacitor. Therefore, in one embodiment, after controlling the fuel cell and the super capacitor to output power at the same time to provide electric energy for the vehicle, the following steps may also be included:

[0089] Detecting whether the power level of the supercapacitor is less than a second preset value, where the second preset value is less than the first preset value;

[0090] When the power of the supercapacitor is less than a second preset value, the fuel cell is controlled to be turned off, and the hydrogen internal combustion engine is controlled to start to provide driving force for the vehicle.

[0091] Here, the second preset value can be set according to demand, and the value of the second preset value is not limited in this embodiment.

[0092] Optionally, when the power level of the supercapacitor is not less than a second preset value, the fuel cell and the supercapacitor are controlled to output power simultaneously to provide electrical energy for the vehicle.

[0093] In one embodiment, when the vehicle demand continues to be greater than the rated power of the fuel cell, the fuel cell is turned off and the hydrogen internal combustion engine is used as the main output unit. During the operation of the vehicle, if it is found that the power of the supercapacitor is lower than the first preset value, the supercapacitor needs to be charged according to the power of the supercapacitor to ensure the power demand of the vehicle during the switching from the hydrogen internal combustion engine to the fuel cell. Therefore, after controlling the fuel cell to be turned off and controlling the hydrogen internal combustion engine to start to provide driving force for the vehicle, it can also include:

[0094] Detecting whether the power level of the supercapacitor is less than a first preset value;

[0095] When the power of the supercapacitor is less than a first preset value, controlling the generator to start and charge the supercapacitor;

[0096] When the electric quantity of the supercapacitor is not less than the first preset value, the generator is kept in the off state or controlled to be off.

[0097] By controlling the charge of the supercapacitor and adjusting the switching conversion of the fuel cell and the hydrogen internal combustion engine, the power generation equipment is always in the high-efficiency range, which can effectively reduce the vehicle's hydrogen consumption and extend the life of the fuel cell system.

[0098] It should be noted that when the vehicle's power demand changes during operation, the start and stop of the fuel cell, the hydrogen internal combustion engine and the supercapacitor are controlled according to the vehicle's power demand to provide driving force for the vehicle.

[0099] In one embodiment, see Figure 3 As shown, the heat exchanger is arranged between the hydrogen internal combustion engine and the fuel cell, and the heat exchanger is always open to ensure that when the vehicle starts, the heat generated by the hydrogen internal combustion engine can be transferred to the fuel cell to heat the fuel cell, so as to achieve the purpose of rapid starting of the fuel cell. When the fuel stops working and the hydrogen internal combustion engine stops, part of the heat can be taken away by the heat dissipation system of the hydrogen internal combustion engine. When the fuel cell stops and the hydrogen internal combustion engine works, the heat of the hydrogen internal combustion engine is taken away by the fuel cell. In the prior art, the hydrogen internal combustion engine and the fuel cell are respectively provided with heat dissipation devices to ensure that the hydrogen internal combustion engine and the fuel cell work within a safe range, and in this embodiment, this is conducive to reducing the radiator area of ​​the two systems.

[0100] The embodiment of the present invention controls the start of the hydrogen internal combustion engine to provide driving force for the vehicle when the vehicle is started, thereby avoiding the problem of long starting time or even failure to start due to low temperature when starting with a fuel cell. When the hydrogen internal combustion engine is started, the supercapacitor can be charged by the generator to provide the fuel cell with the power required for starting, ensuring the normal start of the fuel cell and solving the problem of fast attenuation of the supercapacitor. When the power of the supercapacitor is greater than the first preset value during the operation of the vehicle, the required power of the vehicle is obtained, and the start and stop of the fuel cell, hydrogen internal combustion engine and supercapacitor are controlled according to the required power of the vehicle to provide driving force for the vehicle, so that the vehicle can always be in an efficient working range, improve the working efficiency of the vehicle, and effectively reduce the hydrogen consumption of the whole vehicle. The embodiment of the present invention can also achieve the effect of only hydrogenating the vehicle without charging, thereby avoiding the problem of long charging time and poor user experience.

[0101] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0102] The following is an embodiment of the device of the present invention. For details not described in detail therein, reference may be made to the corresponding method embodiment described above.

[0103] Figure 5 A schematic diagram of the structure of a control device of a hybrid power system provided by an embodiment of the present invention is shown. The hybrid power system includes a fuel cell, a hydrogen internal combustion engine and a super capacitor. For the sake of convenience, only the parts related to the embodiment of the present invention are shown, which are described in detail as follows:

[0104] like Figure 5As shown, the control device 5 of the hybrid power system includes: a control module 51 and an acquisition module 52 .

[0105] The control module 51 is used to control the hydrogen internal combustion engine to start and provide driving force for the vehicle when the vehicle starts;

[0106] The acquisition module 52 is used to acquire the vehicle required power when the power of the super capacitor is greater than a first preset value during the operation of the vehicle;

[0107] The control module 51 is also used to control the start and stop of the fuel cell, the hydrogen internal combustion engine and the super capacitor according to the power demand of the vehicle to provide driving force for the vehicle.

[0108] In a possible implementation, after the control module 51 controls the hydrogen internal combustion engine to start and provide driving force for the vehicle, it is also used to:

[0109] Control the generator to start and charge the supercapacitor.

[0110] In a possible implementation, the control module 51 controls the start and stop of the fuel cell, the hydrogen internal combustion engine and the supercapacitor according to the vehicle's required power, and is used to:

[0111] When the vehicle's required power is less than a first preset power, the hydrogen internal combustion engine is controlled to shut down, and the fuel cell, or the fuel cell and the supercapacitor are controlled to output power to provide electrical energy for the vehicle;

[0112] When the vehicle's required power is greater than or equal to a first preset power, the fuel cell is controlled to be turned off, and the hydrogen internal combustion engine is controlled to be started to provide driving force for the vehicle.

[0113] In a possible implementation, when the vehicle demand power is less than the first preset power, the control module 51 controls the hydrogen internal combustion engine to stop, and controls the fuel cell, or the fuel cell and the super capacitor to output power to provide electrical energy for the vehicle, to:

[0114] When the vehicle's required power is less than the second preset power, the hydrogen internal combustion engine is controlled to stop, and the fuel cell is controlled to start, so as to provide electric energy to the vehicle through the supercapacitor;

[0115] When the vehicle's required power is greater than or equal to the second preset power and less than the first preset power, the fuel cell and the supercapacitor are controlled to output power simultaneously to provide electrical energy for the vehicle.

[0116] In a possible implementation, when the control module 51 controls the fuel cell to start, it is used to:

[0117] The supercapacitor is controlled to supply power to the fuel cell, and the fuel cell is started.

[0118] In a possible implementation, after the control module 51 controls the fuel cell and the supercapacitor to simultaneously output power to provide electrical energy to the vehicle, it is also used to:

[0119] Detecting whether the power level of the supercapacitor is less than a second preset value, where the second preset value is less than the first preset value;

[0120] When the power of the supercapacitor is less than a second preset value, the fuel cell is controlled to be turned off, and the hydrogen internal combustion engine is controlled to start to provide driving force for the vehicle.

[0121] In a possible implementation, after the control module 51 controls the fuel cell to shut down and controls the hydrogen internal combustion engine to start to provide driving force for the vehicle, it is also used to:

[0122] Detecting whether the power level of the supercapacitor is less than a first preset value;

[0123] When the power of the supercapacitor is less than a first preset value, controlling the generator to start and charge the supercapacitor;

[0124] When the electric quantity of the supercapacitor is not less than the first preset value, the generator is kept in the off state or controlled to be off.

[0125] In a possible implementation, the hydrogen internal combustion engine and the fuel cell share an air compressor, and the first throttle valve is connected between the air compressor and the hydrogen internal combustion engine, and the second throttle valve is connected between the air compressor and the fuel cell;

[0126] Before the control module 51 controls the hydrogen internal combustion engine to start, or before controlling the fuel cell to shut down and controlling the hydrogen internal combustion engine to start, it is also used to:

[0127] Control the first throttle valve to open and the second throttle valve to close;

[0128] Before the control module 51 controls the hydrogen internal combustion engine to stop and controls the fuel cell to start, it is also used to:

[0129] Control the second throttle valve to open and the first throttle valve to close.

[0130] The control device of the hybrid power system mentioned above can provide driving force for the vehicle by controlling the hydrogen internal combustion engine to start when the vehicle starts, thereby avoiding the problem of long starting time or even failure to start due to low temperature when starting with a fuel cell. When the hydrogen internal combustion engine starts, the supercapacitor can be charged by the generator to provide the fuel cell with the power required for starting, ensuring the normal starting of the fuel cell and solving the problem of fast attenuation of the supercapacitor. When the power of the supercapacitor is greater than the first preset value during the operation of the vehicle, the acquisition module acquires the required power of the vehicle, and according to the required power of the vehicle, the control module controls the start and stop of the fuel cell, the hydrogen internal combustion engine and the supercapacitor to provide driving force for the vehicle, thereby making the vehicle always in an efficient working range, improving the working efficiency of the vehicle and effectively reducing the hydrogen consumption of the whole vehicle. The embodiment of the present invention can also achieve the effect of only hydrogenating the vehicle without charging, thereby avoiding the problem of long charging time and poor user experience.

[0131] An embodiment of the present invention provides a vehicle, including a controller, Figure 6 is a schematic diagram of a controller provided by an embodiment of the present invention. Figure 6 As shown, the controller 6 of this embodiment includes: a processor 60, a memory 61, and a computer program 62 stored in the memory 61 and executable on the processor 60. When the processor 60 executes the computer program 62, the steps in the above-mentioned control method embodiments of each hybrid power system are implemented, such as Figure 1 Alternatively, when the processor 60 executes the computer program 62, the functions of each module / unit in the above-mentioned device embodiments are realized, for example Figure 5 The functions of each module / unit are shown.

[0132] Exemplarily, the computer program 62 may be divided into one or more modules / units, which are stored in the memory 61 and executed by the processor 60 to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, which are used to describe the execution process of the computer program 62 in the controller 6. For example, the computer program 62 may be divided into Figure 5 The modules / units shown.

[0133] The controller 6 may include, but is not limited to, a processor 60 and a memory 61. Those skilled in the art will appreciate that Figure 6 It is only an example of the controller 6 and does not constitute a limitation of the controller 6. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the controller may also include input and output devices, network access devices, buses, etc.

[0134] The processor 60 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0135] The memory 61 may be an internal storage unit of the controller 6, such as a hard disk or memory of the controller 6. The memory 61 may also be an external storage device of the controller 6, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the controller 6. Further, the memory 61 may also include both an internal storage unit of the controller 6 and an external storage device. The memory 61 is used to store the computer program and other programs and data required by the controller. The memory 61 may also be used to temporarily store data that has been output or is to be output.

[0136] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0137] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0138] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0139] In the embodiments provided by the present invention, it should be understood that the disclosed devices / controllers and methods can be implemented in other ways. For example, the device / controller embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0140] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0141] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0142] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the control method embodiments of the above-mentioned hybrid power system can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium.

[0143] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A control method for a hybrid power system, characterized in that: The hybrid power system includes a fuel cell, a hydrogen internal combustion engine and a super capacitor, and the control method of the hybrid power system includes: When the vehicle starts, controlling the hydrogen internal combustion engine to start and provide driving force for the vehicle; When the power of the supercapacitor is greater than a first preset value during the operation of the vehicle, the required power of the vehicle is obtained; According to the power demand of the vehicle, the start and stop of the fuel cell, the hydrogen internal combustion engine and the super capacitor are controlled to provide driving force for the vehicle.

2. The control method of the hybrid power system according to claim 1, characterized in that: After controlling the hydrogen internal combustion engine to start and provide driving force for the vehicle, the method further includes: The generator is controlled to start and charge the super capacitor.

3. The control method of the hybrid power system according to claim 1, characterized in that: The method of controlling the start and stop of the fuel cell, the hydrogen internal combustion engine and the super capacitor according to the vehicle demand power includes: When the vehicle's required power is less than a first preset power, the hydrogen internal combustion engine is controlled to stop, and the fuel cell, or the fuel cell and the super capacitor are controlled to output power to provide electrical energy for the vehicle; When the vehicle demand power is greater than or equal to the first preset power, the fuel cell is controlled to be turned off, and the hydrogen internal combustion engine is controlled to start to provide driving force for the vehicle.

4. The control method of the hybrid power system according to claim 3, characterized in that: When the vehicle demand power is less than a first preset power, the hydrogen internal combustion engine is controlled to stop, and the fuel cell, or the fuel cell and the super capacitor are controlled to output power to provide electrical energy for the vehicle, including: When the vehicle's required power is less than a second preset power, the hydrogen internal combustion engine is controlled to stop, and the fuel cell is controlled to start, so that the supercapacitor provides electrical energy to the vehicle; When the vehicle demand power is greater than or equal to the second preset power and less than the first preset power, the fuel cell and the super capacitor are controlled to output power simultaneously to provide electrical energy for the vehicle.

5. The control method of the hybrid power system according to claim 4, characterized in that: Controlling the fuel cell to start up, comprising: The supercapacitor is controlled to supply power to the fuel cell, and the fuel cell is started.

6. The control method of the hybrid power system according to claim 4, characterized in that: After controlling the fuel cell and the super capacitor to simultaneously output power to provide electrical energy for the vehicle, the method further includes: Detecting whether the power level of the supercapacitor is less than a second preset value, where the second preset value is less than the first preset value; When the power level of the supercapacitor is less than the second preset value, the fuel cell is controlled to be turned off, and the hydrogen internal combustion engine is controlled to start to provide driving force for the vehicle.

7. The control method of the hybrid power system according to claim 3 or 6, characterized in that: After controlling the fuel cell to shut down and controlling the hydrogen internal combustion engine to start to provide driving force for the vehicle, the method further includes: Detecting whether the power level of the supercapacitor is less than a first preset value; When the power of the supercapacitor is less than the first preset value, controlling the generator to start to charge the supercapacitor; When the electric quantity of the super capacitor is not less than the first preset value, the generator is kept in an off state or controlled to be off.

8. The control method of the hybrid power system according to claim 4, characterized in that: The hydrogen internal combustion engine and the fuel cell share an air compressor, and a first throttle valve is connected between the air compressor and the hydrogen internal combustion engine, and a second throttle valve is connected between the air compressor and the fuel cell; Before controlling the hydrogen internal combustion engine to start, or before controlling the fuel cell to shut down and controlling the hydrogen internal combustion engine to start, the method further includes: Controlling the first throttle valve to open and the second throttle valve to close; Before controlling the hydrogen internal combustion engine to stop and controlling the fuel cell to start, the method further includes: The second throttle valve is controlled to be opened and the first throttle valve is controlled to be closed.

9. A control device for a hybrid power system, characterized in that: include: A control module, used for controlling the hydrogen internal combustion engine to start and provide driving force for the vehicle when the vehicle starts; An acquisition module, used for acquiring the vehicle required power when the power of the supercapacitor is greater than a first preset value during the operation of the vehicle; The control module is also used to control the start and stop of the fuel cell, the hydrogen internal combustion engine and the super capacitor according to the power demand of the vehicle to provide driving force for the vehicle.

10. A vehicle, comprising a controller, the controller comprising a memory and a processor, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory, characterized in that: When the processor executes the computer program, the steps of the control method of the hybrid power system as described in any one of claims 1 to 8 are implemented.

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