Hydrogen energy power system, control method thereof, controller and storage medium

Abstract

The invention discloses a hydrogen energy power system, a control method thereof, a controller and a storage medium. Belongs to the technical field of hydrogen energy power, the hydrogen energy power system comprises a hydrogen energy engine, a hydrogen supply pipeline and a motor, a hydrogen nozzle of the hydrogen energy engine is communicated with the hydrogen supply pipeline, the hydrogen supply pipeline is provided with a hydrogen supply valve, and the hydrogen energy engine is in selective transmission connection with the motor. The hydrogen supply valve and the hydrogen nozzle are kept closed, the motor is controlled to drive the hydrogen energy engine to reach a first preset rotating speed, the hydrogen energy engine is controlled to ignite, the hydrogen energy engine completes N1 working cycles, the hydrogen nozzle is controlled to be opened, the hydrogen energy engine completes N2 working cycles, and the hydrogen supply valve is controlled to be opened, so that starting of the hydrogen energy engine is completed; hydrogen remaining in the hydrogen energy engine is consumed before the hydrogen energy engine is started, the risks of local hydrogen gathering and explosion caused by gas leakage of a hydrogen nozzle are reduced, and the safety of a hydrogen energy power system is improved.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen power technology, and in particular to a hydrogen power system and a control method, a controller and a storage medium thereof. Background Art

[0002] As a green energy, hydrogen has the advantages of being renewable, having high density and high ignition point. Hydrogen engines using hydrogen as fuel are gaining more and more attention.

[0003] In related technologies, the hydrogen nozzle of a hydrogen engine sprays hydrogen into the hydrogen engine. However, when the hydrogen nozzle is used for a long time, the sealing surface of the hydrogen nozzle is easily worn, and hydrogen will leak into the hydrogen engine before the hydrogen engine is started. The hydrogen may also diffuse into flammable areas, causing the hydrogen to burn violently or even explode when the hydrogen engine is started, resulting in poor safety. Summary of the Invention

[0004] The present invention aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, one object of the present invention is to provide a control method for a hydrogen power system, which can improve the safety of the hydrogen power system.

[0005] A second object of the present invention is to provide a computer-readable storage medium.

[0006] The third object of the present invention is to provide a controller for a hydrogen power system.

[0007] The fourth object of the present invention is to provide a hydrogen power system.

[0008] To achieve the above-mentioned objectives, an embodiment of the first aspect of the present invention proposes a control method for a hydrogen power system, wherein the hydrogen power system includes: a hydrogen engine, a hydrogen supply pipeline and a motor, the hydrogen nozzle of the hydrogen engine is connected to the hydrogen supply pipeline, a hydrogen supply valve is provided on the hydrogen supply pipeline, and the hydrogen engine is selectively connected to the motor through transmission. The control method of the hydrogen power system includes: after receiving a start signal, keeping the hydrogen supply valve and the hydrogen nozzle closed, controlling the motor to drive the hydrogen engine to reach a first preset speed; controlling the hydrogen engine to ignite and enable the hydrogen engine to complete N1 working cycles; controlling the hydrogen nozzle to open and enable the hydrogen engine to complete N2 working cycles; controlling the hydrogen supply valve to open to complete the start of the hydrogen engine.

[0009] According to the control method of the hydrogen power system in an embodiment of the present invention, a hydrogen supply valve is provided on the hydrogen supply pipeline, and the hydrogen nozzle of the hydrogen engine is connected to the hydrogen supply pipeline. When the hydrogen engine is started, the hydrogen supply valve and the hydrogen nozzle are kept closed, and the hydrogen engine starts to ignite normally to consume the hydrogen in the cylinder of the hydrogen engine. Then the hydrogen nozzle is opened to consume the hydrogen on the hydrogen supply pipeline between the hydrogen supply valve and the hydrogen nozzle. Finally, the hydrogen supply valve is opened again to complete the start-up of the hydrogen engine, so as to consume the residual hydrogen in the hydrogen engine before the hydrogen engine is started, reduce the risk of local hydrogen accumulation and explosion caused by leakage of the hydrogen nozzle, and thus help improve the safety of the hydrogen power system.

[0010] According to some embodiments of the present invention, both N1 and N2 are integers and satisfy the relationship: 10≤N1≤30, 30≤N2≤70.

[0011] According to some embodiments of the present invention, after the hydrogen engine is started, the hydrogen engine is controlled to disconnect from the motor, or the hydrogen engine is controlled to drive the motor to generate electricity.

[0012] According to some embodiments of the present invention, the control method of the hydrogen power system further includes: controlling the hydrogen supply valve to close after receiving a shutdown signal; and controlling the hydrogen engine to run until a preset condition is met and then shut down.

[0013] According to some embodiments of the present invention, the hydrogen engine has a hydrogen rail, the hydrogen nozzle is connected to the hydrogen supply pipeline through the hydrogen rail, and the preset condition includes: the pressure in the hydrogen rail is lower than a first preset pressure.

[0014] According to some embodiments of the present invention, the hydrogen power system further includes: a hydrogen discharge pipeline, which is connected to the hydrogen rail and is provided with a hydrogen discharge valve. After the hydrogen engine is shut down, the control method of the hydrogen power system further includes: after waiting for a first preset time, controlling the hydrogen discharge valve to open for a second preset time.

[0015] According to some embodiments of the present invention, the method for controlling the hydrogen power system further includes: controlling the hydrogen exhaust valve to open when the pressure in the hydrogen rail is higher than a second preset pressure.

[0016] To achieve the above objectives, a second embodiment of the present invention proposes a computer-readable storage medium on which a control program for a hydrogen power system is stored. When the control program for the hydrogen power system is executed by a processor, the above-mentioned control method for the hydrogen power system is implemented.

[0017] According to the computer-readable storage medium of an embodiment of the present invention, through the control method of the hydrogen power system of the above embodiment, a hydrogen supply valve is provided on the hydrogen supply pipeline, and the hydrogen nozzle of the hydrogen engine is connected to the hydrogen supply pipeline. When the hydrogen engine is started, the hydrogen supply valve and the hydrogen nozzle are kept closed, and the hydrogen engine starts to ignite normally to consume the hydrogen in the cylinder of the hydrogen engine. Then, the hydrogen nozzle is opened to consume the hydrogen on the hydrogen supply pipeline between the hydrogen supply valve and the hydrogen nozzle. Finally, the hydrogen supply valve is opened again to complete the start-up of the hydrogen engine, so as to consume the residual hydrogen in the hydrogen engine before the hydrogen engine is started, reduce the risk of local hydrogen accumulation and explosion caused by leakage of the hydrogen nozzle, and thus help improve the safety of the hydrogen power system.

[0018] To achieve the above-mentioned objectives, the third aspect of the present invention proposes a controller for a hydrogen power system, comprising a memory, a processor, and a control program for the hydrogen power system stored in the memory and runnable on the processor. When the processor executes the control program for the hydrogen power system, the above-mentioned control method for the hydrogen power system is implemented.

[0019] According to the controller of the hydrogen power system of the embodiment of the present invention, through the control method of the hydrogen power system of the above embodiment, a hydrogen supply valve is provided on the hydrogen supply pipeline, and the hydrogen nozzle of the hydrogen engine is connected to the hydrogen supply pipeline. When the hydrogen engine is started, the hydrogen supply valve and the hydrogen nozzle are kept closed, and the hydrogen engine starts to ignite normally to consume the hydrogen in the cylinder of the hydrogen engine. Then, the hydrogen nozzle is opened to consume the hydrogen on the hydrogen supply pipeline between the hydrogen supply valve and the hydrogen nozzle. Finally, the hydrogen supply valve is opened again to complete the start-up of the hydrogen engine, so as to consume the residual hydrogen in the hydrogen engine before the hydrogen engine is started, reduce the risk of local hydrogen accumulation and explosion caused by leakage of the hydrogen nozzle, and thus help improve the safety of the hydrogen power system.

[0020] To achieve the above-mentioned objectives, the fourth embodiment of the present invention proposes a hydrogen power system, comprising: a hydrogen supply pipeline, a hydrogen supply valve being provided on the hydrogen supply pipeline; a hydrogen engine, a hydrogen nozzle of the hydrogen engine being connected to the hydrogen supply pipeline; a motor, the hydrogen engine being selectively connected to the motor through transmission; and a controller, the controller being configured to, after receiving a start signal, keep the hydrogen supply valve and the hydrogen nozzle closed, control the motor to drive the hydrogen engine to reach a first preset speed, and then sequentially control the hydrogen engine to start ignition and complete N1 working cycles, control the hydrogen nozzle to open and complete N2 working cycles, and control the hydrogen supply valve to open to complete the start of the hydrogen engine.

[0021] According to the hydrogen power system of an embodiment of the present invention, a hydrogen supply valve is provided on the hydrogen supply pipeline. Before the hydrogen engine is started, the hydrogen nozzle of the hydrogen engine is connected to the hydrogen supply pipeline. When the hydrogen engine is started, the hydrogen supply valve and the hydrogen nozzle are kept closed, and the hydrogen engine begins to ignite normally to consume the hydrogen in the cylinder of the hydrogen engine. Then the hydrogen nozzle is opened to consume the hydrogen on the hydrogen supply pipeline between the hydrogen supply valve and the hydrogen nozzle. Finally, the hydrogen supply valve is opened again to complete the starting of the hydrogen engine, so as to consume the residual hydrogen in the hydrogen engine before the hydrogen engine is started, reduce the risk of local hydrogen accumulation and explosion caused by leakage of the hydrogen nozzle, and thus help improve the safety of the hydrogen power system.

[0022] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a hydrogen power system according to an embodiment of the present invention; Figure 2 is a flow chart of a method for controlling a hydrogen power system according to an embodiment of the present invention; Figure 3 is a flow chart of a method for controlling a hydrogen power system according to another embodiment of the present invention.

[0024] Reference numerals: Hydrogen engine 1; hydrogen supply pipeline 2; hydrogen supply valve 21; motor 3; hydrogen exhaust pipeline 4; hydrogen exhaust valve 41; controller 5; gearbox 6; pressure sensor 7; hydrogen power system 10. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0026] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0027] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections, or communication; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0028] The hydrogen power system 10 and its control method, the controller 5 and the storage medium according to the embodiment of the present invention are described in detail below with reference to the accompanying drawings.

[0029] Reference Figure 1 and Figure 2 As shown, according to the control method of the hydrogen power system 10 of the first embodiment of the present invention, the hydrogen power system 10 includes: a hydrogen engine 1, a hydrogen supply pipeline 2 and a motor 3, the hydrogen nozzle of the hydrogen engine 1 is connected to the hydrogen supply pipeline 2, the hydrogen supply pipeline 2 is provided with a hydrogen supply valve 21, and the hydrogen engine 1 is selectively connected to the motor 3.

[0030] One end of the hydrogen supply pipeline 2 can be connected to the hydrogen tank, and the other end is connected to the hydrogen nozzle of the hydrogen engine 1. The hydrogen supply valve 21 can be arranged between the hydrogen tank and the hydrogen nozzle. When the hydrogen supply valve 21 is opened, the hydrogen in the hydrogen tank can flow along the hydrogen supply pipeline 2 to the hydrogen nozzle. The hydrogen nozzle can spray hydrogen into the cylinder of the hydrogen engine 1. The hydrogen in the cylinder provides fuel for the hydrogen engine 1. When the hydrogen supply valve 21 is closed, the hydrogen in the hydrogen tank cannot pass through the hydrogen supply valve 21, so that the hydrogen supply pipeline 2 stops supplying hydrogen to the hydrogen engine 1.

[0031] The hydrogen engine 1 is selectively connected to the motor 3. Before the hydrogen engine 1 is started, the hydrogen engine 1 is connected to the motor 3, and the motor 3 can reversely drive the hydrogen engine 1 to start, so that the hydrogen engine 1 meets the starting conditions. After the hydrogen engine 1 is started, if the motor 3 needs to generate electricity, the hydrogen engine 1 and the motor 3 can maintain the connection, and the hydrogen engine 1 drives the motor 3 to generate electricity. If the vehicle needs to be driven directly by the hydrogen engine 1, the connection between the hydrogen engine 1 and the motor 3 can be disconnected, and the hydrogen engine 1 can drive the wheels of the vehicle to drive the vehicle.

[0032] In addition, the hydrogen engine 1 and the motor 3 can be selectively connected through the gearbox 6, and the gearbox 6 can also change the transmission ratio between the hydrogen engine 1 and the motor 3 so that the hydrogen engine 1 and the motor 3 operate in an efficient speed range to reduce energy waste.

[0033] At the same time, the hydrogen engine 1 also has a hydrogen rail, and the hydrogen nozzle is connected to the hydrogen supply pipeline 2 through the hydrogen rail. A pressure sensor 7 is provided on the hydrogen rail, and the pressure sensor 7 is used to detect the hydrogen pressure in the hydrogen rail. The hydrogen power system 10 can also include: a hydrogen discharge pipeline 4, one end of the hydrogen discharge pipeline 4 is connected to the hydrogen rail, and the other end of the hydrogen discharge pipeline 4 is connected to the atmosphere. A hydrogen discharge valve 41 is provided on the hydrogen discharge pipeline 4, and the hydrogen discharge valve 41 is in a normally closed state. When the hydrogen discharge valve 41 is opened, the hydrogen in the hydrogen rail can be discharged.

[0034] Figure 2 is a flow chart of a control method for a hydrogen power system according to an embodiment of the present invention. Figure 2 As shown, the control method of the hydrogen power system includes: Step S1: After receiving the start signal, the hydrogen supply valve and the hydrogen nozzle are kept closed, and the motor is controlled to drive the hydrogen engine to reach a first preset speed.

[0035] Specifically, after receiving the start signal, the motor starts to start and drives the hydrogen engine to rotate. The motor drives the hydrogen engine to reach a first preset speed, wherein the value range of the first preset speed can be 800r / min~1200r / min. Optionally, the first preset speed is 800r / min, or 1000r / min, or 1200r / min, so that the hydrogen engine reaches the starting conditions.

[0036] Step S2, controlling the ignition of the hydrogen engine and making the hydrogen engine complete N1 working cycles.

[0037] Among them, when the hydrogen engine is performing a working cycle, the hydrogen supply valve and the hydrogen nozzle are kept closed, the motor is controlled to drive the hydrogen engine to maintain a first preset speed, and the hydrogen engine is controlled to ignite. The ignition of the hydrogen engine in the working cycle will gradually consume the remaining hydrogen in the cylinder, and can also consume the hydrogen leaked into the cylinder due to failure of the hydrogen nozzle seal. After the hydrogen engine completes N1 working cycles, the hydrogen in the cylinder is burned and consumed and discharged to reduce the remaining hydrogen in the cylinder and prevent the hydrogen in the cylinder from directly entering the exhaust system of the hydrogen engine, thereby reducing the risk of explosion in the exhaust system.

[0038] Step S3, controlling the hydrogen nozzle to open, and allowing the hydrogen engine to complete N2 working cycles.

[0039] Among them, the hydrogen nozzle is controlled to open and the hydrogen supply valve remains closed. The hydrogen on the hydrogen supply pipeline between the hydrogen supply valve and the hydrogen nozzle can enter the cylinder. The ignition working cycle of the hydrogen engine will consume the hydrogen on this section of the hydrogen supply pipeline. After the hydrogen engine completes N2 working cycles, the hydrogen on the hydrogen supply pipeline between the hydrogen supply valve and the hydrogen nozzle enters the cylinder, is burned, consumed and discharged.

[0040] Step S4, controlling the hydrogen supply valve to open to complete the start-up of the hydrogen engine.

[0041] Among them, after the hydrogen supply valve is opened, the flow path of hydrogen from the hydrogen tank to the cylinder is: hydrogen tank, hydrogen supply pipeline, hydrogen nozzle and cylinder. The hydrogen supply valve is controlled to open, and the hydrogen in the hydrogen tank can enter the cylinder along the hydrogen supply pipeline. The hydrogen supply pipeline and the hydrogen engine begin to build up hydrogen pressure. After the hydrogen pressure reaches the working pressure of the hydrogen engine, the start-up of the hydrogen engine is completed.

[0042] It should be noted that before the hydrogen supply valve is opened, the hydrogen nozzle is first opened normally and the hydrogen between the hydrogen supply valve and the hydrogen nozzle is consumed in N2 working cycles of the hydrogen engine. After the hydrogen supply valve is opened, the pressure of the hydrogen between the hydrogen valve and the hydrogen nozzle gradually increases, and then reaches the pressure condition for starting the hydrogen engine. Therefore, when the hydrogen supply valve is opened, the speed of the pressure rise of the hydrogen between the hydrogen supply valve and the hydrogen nozzle can be reduced to avoid abnormal combustion of the hydrogen engine due to excessive pressure rise.

[0043] Understandably, compared to fuel nozzles, hydrogen nozzles lack effective lubrication and cooling. The prolonged effects of dry friction can easily wear the sealing surfaces of hydrogen nozzles, causing hydrogen from the hydrogen supply line to leak into the cylinder even when the nozzle is shut off. Hydrogen can also easily diffuse to local hotspots, such as the spark plug surface, piston surface, and exhaust system of a hydrogen engine. When a hydrogen engine is shut off, the cylinder and exhaust system temperatures are high, and there may be leaked hydrogen in the cylinder. Restarting the hydrogen engine at this point will cause the hydrogen nozzle to directly inject hydrogen into the cylinder, resulting in a high concentration of hydrogen in the cylinder. This could cause the hydrogen to burn or even explode at these local hotspots, compromising the safety of the hydrogen engine.

[0044] According to the control method of the hydrogen power system in an embodiment of the present invention, a hydrogen supply valve is provided on the hydrogen supply pipeline, and the hydrogen nozzle of the hydrogen engine is connected to the hydrogen supply pipeline. When the hydrogen engine is started, the hydrogen supply valve and the hydrogen nozzle are kept closed, and the hydrogen engine starts to ignite normally to consume the hydrogen in the cylinder of the hydrogen engine. Then the hydrogen nozzle is opened to consume the hydrogen on the hydrogen supply pipeline between the hydrogen supply valve and the hydrogen nozzle. Finally, the hydrogen supply valve is opened again to complete the start-up of the hydrogen engine, so as to consume the residual hydrogen in the hydrogen engine before the hydrogen engine is started, reduce the risk of local hydrogen accumulation and explosion caused by leakage of the hydrogen nozzle, and thus help improve the safety of the hydrogen power system.

[0045] In some embodiments of the present invention, N1 and N2 are both integers and satisfy the relationship: 10≤N1≤30, 30≤N2≤70.

[0046] Among them, if N1 is less than 10, there may still be a lot of hydrogen remaining in the cylinder of the hydrogen engine. If N1 is greater than 30, the number of working cycles of the hydrogen engine is too many and the starting time of the hydrogen engine is too long. When 10≤N1≤30, the remaining hydrogen in the cylinder can be fully consumed and the starting time of the hydrogen engine is shorter. Optionally, N1=10, or N1=20, or N1=30.

[0047] If N2 is less than 30, a large amount of hydrogen may remain in the hydrogen supply pipeline between the hydrogen supply valve and the hydrogen nozzle. If N2 is greater than 70, the hydrogen engine has too many working cycles and the start-up time of the hydrogen engine is too long. When 30≤N2≤70, the hydrogen between the hydrogen supply valve and the hydrogen nozzle can be fully consumed, and the start-up time of the hydrogen engine is shorter. Optionally, N2=30, or N2=50, or N2=70.

[0048] In some embodiments of the present invention, after the hydrogen engine is started, the hydrogen engine is controlled to disconnect from the motor, or the hydrogen engine is controlled to drive the motor to generate electricity.

[0049] Specifically, after the hydrogen engine is started, the hydrogen supply pipeline continuously provides hydrogen to the hydrogen engine. The hydrogen combustion in the cylinder generates energy to ensure the normal operation of the hydrogen engine after startup. The hydrogen engine is selectively connected to the motor. Before the hydrogen engine is started, the hydrogen engine and the motor are connected, and the motor can drive the hydrogen engine to start, so that the hydrogen engine reaches the starting conditions. After the hydrogen engine is started, if the motor needs to generate electricity, the hydrogen engine and the motor can maintain the transmission connection, and the hydrogen engine drives the motor to generate electricity. If the vehicle needs to be driven directly by the hydrogen engine, the hydrogen engine and the motor can be disconnected, and the hydrogen engine can drive the vehicle's wheels to move, thereby driving the vehicle.

[0050] In some embodiments, the hydrogen power system may further include a gearbox, through which the hydrogen engine and the motor can be selectively connected. The gearbox controls whether the hydrogen engine and the motor are connected by switching between neutral and transmission gears. The gearbox also changes the transmission ratio between the hydrogen engine and the motor by switching between different transmission gears, so that the hydrogen engine and the motor operate in an efficient speed range, reducing energy waste.

[0051] In some embodiments of the present invention, reference Figure 3 As shown, the control method of the hydrogen power system also includes: Step S21: After receiving the shutdown signal, the hydrogen supply valve is controlled to close.

[0052] Among them, after receiving the shutdown signal, the hydrogen supply valve is closed and the hydrogen nozzle remains open. At this time, the hydrogen engine continues to ignite and work in a cycle, and the hydrogen engine continues to burn the remaining hydrogen in the cylinder and in the hydrogen supply pipeline between the hydrogen supply valve and the hydrogen nozzle.

[0053] It should be noted that the hydrogen in the hydrogen engine will gradually decrease, and the heat generated by the combustion of hydrogen in the hydrogen engine will decrease accordingly, and the speed of the hydrogen engine will decrease. When the speed of the hydrogen engine drops to a first preset speed, the hydrogen engine is connected to the motor, and the motor drives the hydrogen engine to maintain the first preset speed, so that the hydrogen engine works in a cycle and can continue to consume the hydrogen in the hydrogen engine.

[0054] Step S22: Control the hydrogen engine to run until a preset condition is met and then stop.

[0055] Among them, the preset condition can be the number of working cycles of the hydrogen engine, or the preset condition can be the continuous running time of the hydrogen engine. The hydrogen engine will stop after running until the preset condition is met. That is to say, the hydrogen that may leak into the hydrogen engine is consumed before the hydrogen engine is shut down to avoid hydrogen leaking through the hydrogen nozzle to the local hot spot position of the hydrogen engine, and to avoid the leaked hydrogen from burning or even exploding at the local hot spot, thereby improving the safety of the hydrogen power system.

[0056] In some embodiments of the present invention, the hydrogen engine has a hydrogen rail, and the hydrogen nozzle is connected to the hydrogen supply pipeline through the hydrogen rail. The preset conditions include: the pressure in the hydrogen rail is lower than the first preset pressure.

[0057] Among them, a pressure sensor can be provided on the hydrogen rail, and the pressure in the hydrogen rail can be obtained by the pressure sensor on the hydrogen rail. The flow path of hydrogen from the hydrogen tank to the cylinder is: hydrogen tank, hydrogen supply pipeline, hydrogen rail, hydrogen nozzle and cylinder. After receiving the shutdown signal, the hydrogen supply valve is controlled to close and the hydrogen nozzle remains open. The hydrogen engine will burn the hydrogen in the cylinder. At this time, the hydrogen nozzle can continuously spray the hydrogen in the hydrogen rail into the cylinder to reduce the hydrogen in the hydrogen rail, so that the pressure in the hydrogen rail gradually decreases. When the pressure sensor detects that the pressure in the hydrogen rail is lower than the first preset pressure, the hydrogen engine stops running, that is, the motor stops dragging the hydrogen engine to rotate, the motor stops working, and the hydrogen engine stops the working cycle. The value range of the first preset pressure can be 0~0.2MPa. Optionally, the first preset pressure is 0.05MPa, or 0.1MPa, or 0.15MPa.

[0058] In the above embodiment, the pressure in the hydrogen rail is lower than the first preset pressure to consume the remaining hydrogen in the hydrogen rail and the cylinder before the hydrogen engine is shut down, thereby reducing the risk of local hydrogen accumulation and explosion caused by hydrogen nozzle leakage.

[0059] In other embodiments of the present invention, the preset conditions include: the hydrogen engine completes N3 working cycles, where 40≤N3≤100, for example, N3=40, or N3=70, or N3=100, so as to consume the residual hydrogen in the hydrogen rail and the cylinder before the hydrogen engine shuts down.

[0060] In some embodiments of the present invention, the hydrogen power system further includes: a hydrogen exhaust pipeline, the hydrogen exhaust pipeline is connected to the hydrogen rail, and the hydrogen exhaust pipeline is provided with a hydrogen exhaust valve. After the hydrogen engine is shut down, the control method of the hydrogen power system further includes: after waiting for a first preset time, controlling the hydrogen exhaust valve to open for a second preset time.

[0061] Specifically, after the hydrogen engine is shut down, a first preset time is waited to allow the residual hydrogen in the hydrogen rail and the hydrogen exhaust pipe to diffuse evenly, and the hydrogen exhaust valve is controlled to open for a second preset time to allow the residual hydrogen to be fully discharged from the hydrogen exhaust pipe and diffuse into the atmosphere, so that the hydrogen in the hydrogen rail and the hydrogen exhaust pipe is emptied as much as possible, thereby reducing the hydrogen concentration in the hydrogen rail and the hydrogen exhaust pipe to facilitate the next start-up of the hydrogen engine. The first preset time and the second preset time may be in the range of 5s to 15s. Optionally, the first preset time and the second preset time are both 5s, 10s, or 15s.

[0062] In some embodiments of the present invention, the method for controlling a hydrogen power system further includes: controlling the hydrogen exhaust valve to open when the pressure in the hydrogen rail is higher than a second preset pressure.

[0063] Among them, the pressure sensor on the hydrogen rail can detect the pressure inside the hydrogen rail. When the pressure inside the hydrogen rail is higher than the second preset pressure, the pressure sensor will issue an alarm, and then the hydrogen discharge valve will open to allow the hydrogen in the hydrogen rail to be discharged to the atmosphere through the hydrogen discharge pipeline.

[0064] It is understandable that if the pressure in the hydrogen rail is higher than the second preset pressure, the hydrogen will exert a greater pressure on the hydrogen nozzle, which may easily cause damage to the hydrogen nozzle, thereby causing a large amount of hydrogen in the hydrogen rail to leak into the cylinder of the hydrogen engine and cause an explosion.

[0065] In the above embodiment, during the startup, operation, or shutdown of the hydrogen engine, that is, during steps S1 to S4 and steps S21 to S23, the pressure within the hydrogen rail can be detected in real time. When the pressure within the hydrogen rail exceeds a second preset pressure, the hydrogen drain valve is controlled to open. The opening of the hydrogen drain valve allows hydrogen within the hydrogen rail to flow into the hydrogen drain line and be discharged into the atmosphere through the hydrogen drain line, thereby reducing the risk of damage to the hydrogen nozzle and explosion of the hydrogen engine. The second preset pressure can range from 1 MPa to 2 MPa. Optionally, the first preset pressure is 1 MPa, 1.5 MPa, or 2 MPa.

[0066] According to the computer-readable storage medium of the second embodiment of the present invention, a control program of a hydrogen power system is stored thereon, and when the control program of the hydrogen power system is executed by a processor, the control method of the hydrogen power system described above is implemented.

[0067] According to the computer-readable storage medium of an embodiment of the present invention, through the control method of the hydrogen power system of the above embodiment, a hydrogen supply valve is provided on the hydrogen supply pipeline, and the hydrogen nozzle of the hydrogen engine is connected to the hydrogen supply pipeline. When the hydrogen engine is started, the hydrogen supply valve and the hydrogen nozzle are kept closed, and the hydrogen engine starts to ignite normally to consume the hydrogen in the cylinder of the hydrogen engine. Then, the hydrogen nozzle is opened to consume the hydrogen on the hydrogen supply pipeline between the hydrogen supply valve and the hydrogen nozzle. Finally, the hydrogen supply valve is opened again to complete the start-up of the hydrogen engine, so as to consume the residual hydrogen in the hydrogen engine before the hydrogen engine is started, reduce the risk of local hydrogen accumulation and explosion caused by leakage of the hydrogen nozzle, and thus help improve the safety of the hydrogen power system.

[0068] According to the third aspect of the present invention, the controller of the hydrogen power system includes a memory, a processor, and a control program of the hydrogen power system stored in the memory and executable on the processor. When the processor executes the control program of the hydrogen power system, the above-mentioned control method of the hydrogen power system is implemented.

[0069] According to the controller of the hydrogen power system of the embodiment of the present invention, through the control method of the hydrogen power system of the above embodiment, a hydrogen supply valve is provided on the hydrogen supply pipeline, and the hydrogen nozzle of the hydrogen engine is connected to the hydrogen supply pipeline. When the hydrogen engine is started, the hydrogen supply valve and the hydrogen nozzle are kept closed, and the hydrogen engine starts to ignite normally to consume the hydrogen in the cylinder of the hydrogen engine. Then, the hydrogen nozzle is opened to consume the hydrogen on the hydrogen supply pipeline between the hydrogen supply valve and the hydrogen nozzle. Finally, the hydrogen supply valve is opened again to complete the start-up of the hydrogen engine, so as to consume the residual hydrogen in the hydrogen engine before the hydrogen engine is started, reduce the risk of local hydrogen accumulation and explosion caused by leakage of the hydrogen nozzle, and thus help improve the safety of the hydrogen power system.

[0070] Reference Figure 1As shown, the hydrogen power system 10 according to the fourth embodiment of the present invention includes: a hydrogen supply pipeline 2, a hydrogen engine 1, a motor 3 and a controller 5. The hydrogen supply pipeline 2 is provided with a hydrogen supply valve 21, the hydrogen nozzle of the hydrogen engine 1 is connected to the hydrogen supply pipeline 2, and the hydrogen engine 1 is selectively connected to the motor 3. The controller 5 is configured to keep the hydrogen supply valve 21 and the hydrogen nozzle closed after receiving the start signal, control the motor 3 to drive the hydrogen engine 1 to reach a first preset speed, and then control the hydrogen engine 1 to start ignition and complete N1 working cycles, control the hydrogen nozzle to open and complete N2 working cycles, and control the hydrogen supply valve 21 to open to complete the start of the hydrogen engine 1.

[0071] Among them, the controller 5 is connected to the hydrogen supply valve 21 through a wiring harness, and controls the opening and closing of the hydrogen supply valve 21 through signal communication. The controller 5 is connected to the hydrogen exhaust valve 41 through a wiring harness, and controls the opening and closing of the hydrogen exhaust valve 41 through signal communication. The controller 5 is connected to the pressure sensor 7 of the hydrogen rail through a wiring harness, and reads the pressure of the hydrogen rail through the signal of the pressure sensor 7. The controller 5 is connected to the motor 3 through a wiring harness, and controls the start and stop of the motor 3 through signal communication.

[0072] According to the hydrogen power system 10 of an embodiment of the present invention, a hydrogen supply valve 21 is provided on the hydrogen supply pipeline 2, and the hydrogen nozzle of the hydrogen engine 1 is connected to the hydrogen supply pipeline 2. When the hydrogen engine 1 is started, the hydrogen supply valve 21 and the hydrogen nozzle are kept closed, and the hydrogen engine 1 starts to ignite normally to consume the hydrogen in the cylinder of the hydrogen engine 1, and then the hydrogen nozzle is opened to consume the hydrogen on the hydrogen supply pipeline 2 between the hydrogen supply valve 21 and the hydrogen nozzle. Finally, the hydrogen supply valve 21 is opened again to complete the startup of the hydrogen engine 1, so as to consume the residual hydrogen in the hydrogen engine 1 before the hydrogen engine 1 is started, thereby reducing the risk of local hydrogen accumulation and explosion caused by leakage of the hydrogen nozzle, thereby helping to improve the safety of the hydrogen power system 10.

[0073] In some embodiments of the present invention, N1 and N2 are both integers and satisfy the relationship: 10≤N1≤30, 30≤N2≤70.

[0074] In some embodiments of the present invention, the controller 5 is further configured to control the hydrogen engine 1 to disconnect the transmission from the motor 3 or to control the hydrogen engine 1 to drive the motor 3 to generate electricity after the hydrogen engine 1 is started.

[0075] In some embodiments of the present invention, the controller 5 is further configured to control the hydrogen supply valve 21 to close after receiving a shutdown signal, and control the hydrogen engine 1 to run until a preset condition is met and then shut down.

[0076] In some embodiments of the present invention, the hydrogen engine 1 has a hydrogen rail, and the hydrogen nozzle is connected to the hydrogen supply pipeline 2 through the hydrogen rail. The preset conditions include: the pressure in the hydrogen rail is lower than the first preset pressure.

[0077] In some embodiments of the present invention, the hydrogen power system 10 further includes: a hydrogen exhaust pipeline 4, which is connected to the hydrogen rail and is provided with a hydrogen exhaust valve 41. The controller 5 is further configured to control the hydrogen power system 10 after the hydrogen engine 1 is shut down. The method also includes: after waiting for a first preset time, controlling the hydrogen exhaust valve 41 to open for a second preset time.

[0078] In some embodiments of the present invention, the controller 5 is further configured to control the hydrogen discharge valve 41 to open when the pressure in the hydrogen rail is higher than a second preset pressure.

[0079] It should be noted that the specific implementation method of the hydrogen power system in the embodiment of the present invention is similar to the specific implementation method of the control method of the hydrogen power system in the embodiment of the present invention. Please refer to the description of the method part for details. In addition, the other components and functions of the hydrogen power system in the embodiment of the present invention are known to those skilled in the art. In order to reduce redundancy, they will not be described here.

[0080] It should be noted that the logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic device), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0081] It should be understood that various components of the present invention may be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods may be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof may be used: a discrete logic circuit having logic gate circuits for implementing logic functions on data signals, an application-specific integrated circuit having suitable combinational logic gate circuits, a programmable gate array (PGA), a field-programmable gate array (FPGA), etc.

[0082] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0083] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for controlling a hydrogen power system, characterized in that: The hydrogen power system includes: a hydrogen engine, a hydrogen supply pipeline and a motor. The hydrogen nozzle of the hydrogen engine is connected to the hydrogen supply pipeline. A hydrogen supply valve is provided on the hydrogen supply pipeline. The hydrogen engine is selectively connected to the motor. The control method of the hydrogen power system includes: After receiving the start signal, keeping the hydrogen supply valve and the hydrogen nozzle closed, controlling the motor to drive the hydrogen engine to reach a first preset speed; Controlling the ignition of the hydrogen engine and causing the hydrogen engine to complete N1 working cycles; Controlling the hydrogen nozzle to open and causing the hydrogen engine to complete N2 working cycles; The hydrogen supply valve is controlled to open to complete the start-up of the hydrogen engine.

2. The control method of the hydrogen power system according to claim 1, characterized in that: Both N1 and N2 are integers and satisfy the relationship: 10≤N1≤30, 30≤N2≤70.

3. The control method of the hydrogen power system according to claim 1, characterized in that: After the hydrogen engine is started, the hydrogen engine is controlled to disconnect from the motor, or the hydrogen engine is controlled to drive the motor to generate electricity.

4. The method for controlling a hydrogen power system according to any one of claims 1 to 3, characterized in that: The control method of the hydrogen power system further includes: After receiving the shutdown signal, controlling the hydrogen supply valve to close; The hydrogen engine is controlled to run until a preset condition is met and then shut down.

5. The control method of the hydrogen power system according to claim 4, characterized in that: The hydrogen engine has a hydrogen rail, and the hydrogen nozzle is connected to the hydrogen supply pipeline through the hydrogen rail. The preset condition includes: the pressure in the hydrogen rail is lower than a first preset pressure.

6. The control method of the hydrogen power system according to claim 5, characterized in that: The hydrogen power system further includes: a hydrogen discharge pipeline, which is connected to the hydrogen rail and is provided with a hydrogen discharge valve. After the hydrogen engine is shut down, the control method of the hydrogen power system further includes: after waiting for a first preset time, controlling the hydrogen discharge valve to open for a second preset time.

7. The control method of the hydrogen power system according to claim 6, characterized in that: The control method of the hydrogen power system further includes: When the pressure in the hydrogen rail is higher than a second preset pressure, the hydrogen exhaust valve is controlled to open.

8. A computer-readable storage medium, characterized in that A control program of a hydrogen power system is stored thereon, and when the control program of the hydrogen power system is executed by a processor, a control method of a hydrogen power system according to any one of claims 1 to 7 is implemented.

9. A controller for a hydrogen power system, characterized in that: The invention comprises a memory, a processor and a control program of a hydrogen power system stored in the memory and executable on the processor. When the processor executes the control program of the hydrogen power system, the control method of the hydrogen power system according to any one of claims 1 to 7 is implemented.

10. A hydrogen power system, characterized in that: include: A hydrogen supply pipeline, wherein a hydrogen supply valve is provided on the hydrogen supply pipeline; A hydrogen engine, wherein the hydrogen nozzle of the hydrogen engine is connected to the hydrogen supply pipeline; A motor, the hydrogen engine being selectively connected to the motor; The controller is configured to, after receiving a start signal, keep the hydrogen supply valve and the hydrogen nozzle closed, control the motor to drive the hydrogen engine to reach a first preset speed, and then sequentially control the hydrogen engine to start ignition and complete N1 working cycles of the hydrogen engine, control the hydrogen nozzle to open and complete N2 working cycles of the hydrogen engine, and control the hydrogen supply valve to open to complete the start of the hydrogen engine.

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