A fuel cell output power control method, device, equipment and storage medium

Abstract

The fuel cell output power control method in the embodiment of the application, by obtaining the energy storage device operating power, the vehicle demand power and the minimum output power of the safety voltage, if the minimum output power of the safety voltage is greater than or equal to the vehicle demand power, it is determined as the idle state, and the current energy storage state and the power battery residual capacity are listened, if the energy storage saturation state and the power battery residual capacity is greater than or equal to the capacity control threshold, the energy storage device power is increased and the energy storage incremental power is determined, when the sum of the energy storage incremental power, the energy storage device operating power and the vehicle demand power is greater than or equal to the minimum output power of the safety voltage, it is determined as the fuel cell output power; the method adjusts the energy storage device power according to the energy storage state when the vehicle is in the idle state, stores or offsets the redundant power, so as to determine the fuel cell output power, ensures that the fuel cell output is consistent with the consumption of the energy storage device in the idle state, and realizes that the vehicle power output is zero.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery control, and in particular to a fuel cell output power control method, device, equipment and storage medium. BACKGROUND

[0002] The fuel cell stack is a device that can convert the chemical energy contained in hydrogen and oxygen into electrical energy for external output, and the reaction product is water. Fuel cell vehicles using fuel cell stack systems as a power source have the advantages of environmental protection and high efficiency. When the fuel cell vehicle enters the idle operating condition, the power demand of the fuel cell stack requires the vehicle to achieve zero power output. In the existing control process, when the rated power of the fuel cell stack is high, it is necessary to maintain a high voltage open circuit state or even a shutdown state, which will cause irreversible damage to the fuel cell under high voltage, and repeated power-on will also reduce the service life of the fuel cell.

[0003] In the existing fuel cell output power control process, for example, in the fuel cell system and idle control method of CN111409509, a heater is used to consume the redundant power of the fuel cell stack greater than the demand of the vehicle at idle. This method only consumes redundant power and cannot recover energy. In addition, in the hydrogen fuel cell logistics vehicle stack idle control method disclosed in CN111942233A, the air compression motor is controlled to output a set power to consume redundant power. However, under the adjustment of the set power, it is difficult to accurately control the zero power output of the vehicle, and the adjustment process does not solve the damage to the battery caused by high voltage. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a fuel cell output power control method, device, equipment and storage medium to solve the problem that the existing method only consumes redundant power and cannot recover energy, and the damage to the fuel cell caused by high voltage open circuit.

[0005] The application provides a fuel cell output power control method, which comprises the following steps: obtaining an energy storage device operating power, a vehicle demand power and a minimum output power of a safety voltage; if the minimum output power of the safety voltage is greater than or equal to the vehicle demand power, determining that a vehicle operating state is an idle state, and monitoring a current energy storage state of the energy storage device and a remaining power of a power battery; if the current energy storage state is an energy storage saturation state and the remaining power of the power battery is greater than or equal to a power control threshold, controlling to increase the energy storage device operating power, and determining an energy storage incremental power of the energy storage device, wherein the energy storage incremental power is a power amount increased after the energy storage device operating power is increased; when a sum of the energy storage incremental power, the energy storage device operating power and the vehicle demand power is greater than or equal to the minimum output power of the safety voltage, determining the sum of the energy storage incremental power, the energy storage device operating power and the vehicle demand power as a fuel cell output power, so that the vehicle power output under the safety voltage is zero when the vehicle operating state is the idle state.

[0006] In an embodiment of the application, the current energy storage state comprises an energy storage saturation state and an energy storage unsaturation state, and after monitoring the current energy storage state of the energy storage device and the remaining power of the power battery, the fuel cell output power control method further comprises: if the current energy storage state is the energy storage unsaturation state and the remaining power of the power battery is greater than or equal to the power control threshold, comparing a sum of the energy storage device operating power and the vehicle demand power with the minimum output power of the safety voltage; and when the sum of the energy storage device operating power and the vehicle demand power is greater than or equal to the minimum output power of the safety voltage, determining the sum of the energy storage device operating power and the vehicle demand power as the fuel cell output power.

[0007] In an embodiment of the application, after monitoring the current energy storage state of the energy storage device and the remaining power of the power battery, the fuel cell output power control method further comprises: if the remaining power of the power battery is less than the power control threshold, controlling the fuel cell to charge, and obtaining a fuel cell charging power; and when a sum of the fuel cell charging power and the vehicle demand power is greater than or equal to the minimum output power of the safety voltage, determining the sum of the fuel cell charging power and the vehicle demand power as the fuel cell output power.

[0008] In an embodiment of the application, the vehicle operating state comprises an idle state and a normal state, and after obtaining the energy storage device operating power, the vehicle demand power and the minimum output power of the safety voltage, the fuel cell output power control method further comprises: if the minimum output power of the safety voltage is less than the vehicle demand power, determining that the vehicle operating state is the normal state, and determining the vehicle demand power as the fuel cell output power.

[0009] In an embodiment of the present application, after the sum of the energy storage incremental power, the energy storage device operating power and the vehicle demand power is determined as the fuel cell output power, the fuel cell output power control method further comprises: if the vehicle operating state is changed from the idle state to the normal state, obtaining the current energy storage ratio of the energy storage device; if the current energy storage ratio is greater than the energy supply switching ratio threshold, determining the energy storage device as the vehicle energy supply device.

[0010] In an embodiment of the present application, after the current energy storage amount of the energy storage device is obtained, the fuel cell output power control method further comprises: if the current energy storage ratio is less than or equal to the energy supply switching ratio threshold, determining the fuel cell as the vehicle energy supply device.

[0011] In an embodiment of the present application, before the energy storage device operating power, the vehicle demand power and the minimum output power of the safety voltage are obtained, the fuel cell output power control method further comprises: detecting the fuel cell operating state, the fuel cell operating state including operating and closing; if the fuel cell operating state is operating, monitoring the current safety voltage power of each device in the fuel cell system; determining the sum of the current safety voltage power of each device in the fuel cell system as the minimum output power of the safety voltage.

[0012] In an embodiment of the present application, before the current safety voltage power of each device in the fuel cell system is monitored, the fuel cell output power control method further comprises: obtaining the current device operating voltage of each device in the fuel cell system; if there is a current device operating voltage greater than or equal to the safety operating voltage threshold, controlling to reduce each current device operating voltage to be less than the safety operating voltage threshold; when each current device operating voltage is less than the safety operating voltage threshold, monitoring the current safety voltage power of each device in the fuel cell system.

[0013] In an embodiment of the present application, the energy storage device comprises an air compressor, an air supply system and a flywheel drive motor, and the control to increase the energy storage device operating power and the monitoring of the energy storage incremental power of the energy storage device comprises: controlling to increase the air compressor operating power, and controlling the air supply system to introduce air flow to the flywheel drive motor to discharge the incremental air flow introduced after the air compressor operating power is increased, the direction of the air flow being opposite to the flywheel rotation direction of the flywheel drive motor; monitoring the incremental power of the air compressor operating power, and determining the incremental power of the air compressor operating power as the energy storage incremental power of the energy storage device.

[0014] The embodiment of the present application also provides a fuel cell output power control device, which comprises: an operating parameter acquisition module, which is used to acquire the operating power of an energy storage device, the demand power of a whole vehicle and the minimum output power of a safety voltage; an operating state determination module, which is used to determine that the operating state of the vehicle is an idle state if the minimum output power of the safety voltage is greater than or equal to the demand power of the whole vehicle, and to listen to the current energy storage state of the energy storage device and the residual power of a power battery; and a power adjustment module, which is used to control the increase of the operating power of the energy storage device if the current energy storage state is an energy storage saturation state and the residual power of the power battery is greater than or equal to a power control threshold, and to determine the energy storage incremental power of the energy storage device; and when the sum of the energy storage incremental power, the operating power of the energy storage device and the demand power of the whole vehicle is greater than or equal to the minimum output power of the safety voltage, the sum is determined as the fuel cell output power, so that the whole vehicle power output under the safety voltage is zero when the operating state of the vehicle is the idle state.

[0015] The embodiment of the present application also provides an electronic device, which comprises: one or more processors; and a storage device, which is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the electronic device implements the fuel cell output power control method in any one of the above embodiments.

[0016] The embodiment of the present application also provides a computer readable storage medium, which stores computer readable instructions, and when the computer readable instructions are executed by a processor of a computer, the computer executes the fuel cell output power control method in any one of the above embodiments.

[0017] The fuel cell output power control method in the embodiment of the present application acquires the operating power of an energy storage device, the demand power of a whole vehicle and the minimum output power of a safety voltage, determines that the operating state is an idle state if the minimum output power of the safety voltage is greater than or equal to the demand power of the whole vehicle, listens to the current energy storage state and the residual power of a power battery, increases the power of the energy storage device if the current energy storage state is an energy storage saturation state and the residual power of the power battery is greater than or equal to a power control threshold, determines the energy storage incremental power, and determines the sum of the energy storage incremental power, the operating power of the energy storage device and the demand power of the whole vehicle as the fuel cell output power when the sum is greater than or equal to the minimum output power of the safety voltage; the method adjusts the power of the energy storage device according to the energy storage state when the vehicle is in the idle state, stores or offsets the redundant power, determines the fuel cell output power, ensures that the fuel cell output is consistent with the consumption of the energy storage device in the idle state, and realizes that the whole vehicle power output is zero.

[0018] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0020] Figure 1 This is a schematic diagram illustrating an exemplary system architecture as shown in an exemplary embodiment of this application;

[0021] Figure 2 This is a flowchart illustrating a fuel cell output power control method in an exemplary embodiment of this application;

[0022] Figure 3 This is a schematic diagram illustrating a specific fuel cell system architecture, as shown in an exemplary embodiment of this application;

[0023] Figure 4 This is a schematic diagram illustrating a specific fuel cell output power control method in an exemplary embodiment of this application;

[0024] Figure 5 This is a schematic diagram illustrating a specific power supply switching control method in an exemplary embodiment of this application;

[0025] Figure 6 This is a schematic diagram of a fuel cell output power control device shown in an exemplary embodiment of this application;

[0026] Figure 7 This is a schematic diagram of the structure of a computer system for an electronic device, as illustrated in an exemplary embodiment of this application. Detailed Implementation

[0027] The embodiments of the present invention will be described below with reference to the accompanying drawings and specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0028] It is to be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present application, and thus only the components related to the present application are shown in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation, and the type, number and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type can also be more complex.

[0029] In the following description, numerous specific details are discussed in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to one of ordinary skill in the art that the embodiments of the present application can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the embodiments of the present application.

[0030] In the present application, the association relationship of the associated objects described by "and / or" can represent three relationships, for example, A and / or B can represent three cases of A existing alone, A and B existing together, and B existing alone. The character " / " generally represents an "or" relationship between the front and rear associated objects.

[0031] First of all, it should be pointed out that the fuel cell is an electrochemical power generation device, which is an isothermal electrochemical process that directly converts chemical energy into electrical energy without going through a heat engine process, and is not limited by the Carnot cycle, so the energy conversion efficiency is high, and there is no pollution, and it is becoming an ideal energy utilization method. At the same time, with the continuous maturity of fuel cell technology, and the provision of sufficient natural gas sources by the West-East Gas Transmission Project, the commercial application of fuel cells has broad development prospects.

[0032] The present application can also provide the beneficial effects including: determining different power adjustment strategies according to the determination result of the energy storage state and the size of the remaining power of the power battery, ensuring that the vehicle power is zero output in the idle state, improving the storage and control of the power of the vehicle energy storage device, and facilitating the recovery of redundant power; detecting the vehicle operating state and controlling the power output in the idle state in time, so as to control the vehicle when it enters the idle state, and avoid damaging the fuel cell; selecting the current vehicle energy supply device based on the energy storage ratio of the energy storage device when the vehicle operating state changes to the normal state, so as to improve the vehicle endurance; detecting the safe operating voltage threshold of the vehicle when the safe operating voltage is met, and taking the safe operating voltage threshold as the minimum power required under the safe voltage, effectively controlling the safe voltage of the fuel cell, protecting the safe voltage environment of the fuel cell, and avoiding damage to the fuel cell caused by high voltage open circuit state.

[0033] Figure 1 is a schematic diagram of an exemplary system architecture shown by an exemplary embodiment of the present application.

[0034] Reference Figure 1 As shown, the system architecture may include a fuel cell system 101 and a computer device 102. The computer device 102 is used to determine the vehicle's operating state as idling if the minimum safe voltage output power is greater than or equal to the vehicle's required power, and to monitor the current energy storage state of the energy storage device and the remaining power of the battery. If the current energy storage state is saturated and the remaining power of the battery is greater than or equal to the power control threshold, the computer device increases the operating power of the energy storage device and determines the incremental energy storage power. When the sum of the incremental energy storage power, the operating power of the energy storage device, and the vehicle's required power is greater than or equal to the minimum safe voltage output power, the sum of these three powers is determined as the fuel cell output power. The computer device 102 may be at least one of a microcomputer, an embedded computer, a network computer, or a microcontroller. The fuel cell system 101 is used to collect and acquire the operating power of the energy storage device, the vehicle's required power, and the minimum safe voltage output power. This fuel cell system 101 is used in fuel cell vehicles to power the vehicle's operation.

[0035] Indicatively, after acquiring the operating power of the energy storage device, the required power of the vehicle, and the minimum output power of the safe voltage of the fuel cell system 101, the computer device 102 determines the idling state if the minimum output power of the safe voltage is greater than or equal to the required power of the vehicle. It then monitors the current energy storage state and the remaining charge of the power battery. If the energy storage is saturated and the remaining charge of the power battery is greater than or equal to the charge control threshold, the power of the energy storage device is increased, and the incremental power of the energy storage is determined. When the sum of the incremental power of the energy storage, the operating power of the energy storage device, and the required power of the vehicle is greater than or equal to the minimum output power of the safe voltage, this sum is determined as the output power of the fuel cell. This method adjusts the power of the energy storage device according to the energy storage state when the vehicle is idling, storing or offsetting redundant power to determine the output power of the fuel cell, ensuring that the output of the fuel cell in the idling state is consistent with the consumption of the energy storage device, thus achieving zero power output for the entire vehicle.

[0036] Figure 2 This is a flowchart illustrating an exemplary embodiment of the present application of a fuel cell output power control method, which can... Figure 1 This is executed within the system architecture of the fuel cell system 101 and computer device 102 shown. (Refer to...) Figure 2 As shown, the flowchart of the fuel cell output power control method includes at least steps S210 to S240, which are described in detail below:

[0037] In step S210, the operating power of the energy storage device, the required power of the whole vehicle, and the minimum output power of the safe voltage are obtained.

[0038] In one embodiment of the present application, before obtaining the operating power of the energy storage device, the required power of the whole vehicle and the minimum output power of the safety voltage, the operating state of the fuel cell is detected, wherein the operating state of the fuel cell includes running and closing.

[0039] In one embodiment of the present application, if the operating state of the fuel cell is running, the current safety voltage power of each device in the fuel cell system is monitored, and the sum of the current safety voltage power of each device in the fuel cell system is determined as the minimum output power of the safety voltage.

[0040] In one embodiment of the present application, if the operating state of the fuel cell is closing, the step of detecting the operating state of the fuel cell is returned.

[0041] In one embodiment of the present application, before monitoring the current safety voltage power of each device in the fuel cell system, the current device operating voltage of each device in the fuel cell system is obtained.

[0042] In one embodiment of the present application, if there is a current device operating voltage greater than or equal to the safety operating voltage threshold, the current device operating voltage of each device is controlled to be less than the safety operating voltage threshold until the current safety voltage power of each device in the fuel cell system is monitored when the current device operating voltage of each device is less than the safety operating voltage threshold.

[0043] In one embodiment of the present application, the safety operating voltage threshold when the vehicle meets the safety operating voltage is detected, and the safety operating voltage threshold is used as the minimum power required to meet the safety voltage, effectively controlling the safety voltage of the fuel cell, protecting the safety of the voltage environment of the fuel cell, and avoiding damage to the fuel cell caused by high voltage open circuit state.

[0044] In step S220, if the minimum output power of the safety voltage is greater than or equal to the required power of the whole vehicle, it is determined that the operating state of the vehicle is an idle state, and the current energy storage state of the energy storage device and the remaining power of the power battery are monitored.

[0045] In one embodiment of the present application, the operating state of the vehicle includes an idle state and a normal state, wherein the minimum output power of the safety voltage is less than the required power of the whole vehicle, and the normal state is the minimum output power of the safety voltage greater than or equal to the required power of the whole vehicle.

[0046] In one embodiment of the present application, the above-mentioned current energy storage state includes an energy storage saturated state and an energy storage unsaturated state.

[0047] In one embodiment of the present application, after the current energy storage state of the energy storage device and the remaining power of the power battery are monitored, if the current energy storage state is the energy storage unsaturated state, and the remaining power of the power battery is greater than or equal to the power control threshold, the sum of the power of the energy storage device operating power and the vehicle demand power is compared with the safe voltage minimum output power, and when the sum of the power of the energy storage device operating power and the vehicle demand power is greater than or equal to the safe voltage minimum output power, the sum of the power of the energy storage device operating power and the vehicle demand power is determined as the fuel cell output power.

[0048] In one embodiment of the present application, if the remaining power of the power battery is less than the power control threshold, the fuel cell is controlled to charge the power battery, and the fuel cell charging power is obtained, and when the sum of the power of the fuel cell charging power and the vehicle demand power is greater than or equal to the safe voltage minimum output power, the sum of the power of the fuel cell charging power and the vehicle demand power is determined as the fuel cell output power.

[0049] In one embodiment of the present application, if the safe voltage minimum output power is less than the vehicle demand power, it is determined that the vehicle operating state is the normal state, and the vehicle demand power is determined as the fuel cell output power.

[0050] In one embodiment of the present application, the power control threshold is a power proportion threshold of the remaining power of the power battery, which can be set according to the demand for the remaining power of the fuel cell in the specific implementation process of the present application. For example, in some implementable environments of the present application, the power control threshold can be specifically set to 90%. It should be noted that the specific determination method and value of the power control threshold are only exemplary examples of the present embodiment, and the power control threshold is not specifically limited herein.

[0051] In one embodiment of the present application, different power adjustment strategies are determined according to the determination result of the energy storage state and the size of the remaining power of the power battery, which ensures that the vehicle power is zero output in the idle state, and improves the storage and control of the vehicle energy storage device power, facilitating the recovery of redundant power.

[0052] In one embodiment of the present application, the vehicle operating state is detected, and the power output in the idle state is controlled in time, so as to control the vehicle when it enters the idle state, and avoid damaging the fuel cell.

[0053] In step S230, if the current energy storage state is the energy storage saturated state, and the remaining power of the power battery is greater than or equal to the power control threshold, the energy storage device operating power is controlled to be increased, and the energy storage increment power of the energy storage device is determined.

[0054] In an embodiment of the present application, the energy storage increment power is the power increment of the energy storage device after the operation power of the energy storage device is increased.

[0055] In an embodiment of the present application, the energy storage device includes, but is not limited to, an air compressor, an air supply system, and a flywheel driving motor.

[0056] In an embodiment of the present application, the control of increasing the operation power of the energy storage device and the monitoring of the energy storage increment power of the energy storage device specifically include the control of increasing the operation power of the air compressor and the control of introducing air flow into the flywheel driving motor by the air supply system to exhaust the increment air flow introduced after the operation power of the air compressor is increased, the direction of the air flow being opposite to the rotation direction of the flywheel of the flywheel driving motor, the monitoring of the increment power of the operation power of the air compressor, and the determination of the increment power of the operation power of the air compressor as the energy storage increment power of the energy storage device.

[0057] In an embodiment of the present application, the fuel cell stack continues to supply power to the flywheel driving motor to offset the energy loss caused by the air flow purging the flywheel, so as to maintain the energy stored in the energy storage system unchanged.

[0058] In step S240, when the sum of the energy storage increment power, the operation power of the energy storage device, and the power demand of the whole vehicle is greater than or equal to the minimum output power of the safety voltage, the sum of the energy storage increment power, the operation power of the energy storage device, and the power demand of the whole vehicle is determined as the fuel cell output power, so as to make the whole vehicle power output at the safety voltage zero when the vehicle operating state is the idle state.

[0059] In an embodiment of the present application, after the sum of the energy storage increment power, the operation power of the energy storage device, and the power demand of the whole vehicle is determined as the fuel cell output power, the numerical change of the minimum output power of the safety voltage and the power demand of the whole vehicle is detected in real time, and when the minimum output power of the safety voltage is less than the power demand of the whole vehicle, the vehicle operating state is changed from the idle state to the normal state.

[0060] In an embodiment of the present application, if the vehicle operating state is changed from the idle state to the normal state, the current energy storage ratio of the energy storage device is obtained, and if the current energy storage ratio is greater than the energy supply switching ratio threshold, the energy storage device is determined as the whole vehicle energy supply device.

[0061] In an embodiment of the present application, if the current energy storage ratio is less than or equal to the energy supply switching ratio threshold, the fuel cell is determined as the whole vehicle energy supply device.

[0062] In an embodiment of the present application, the current vehicle energy supply device is selected based on the energy storage ratio of the energy storage device when the vehicle operating state is changed to the normal state, so as to facilitate the improvement of the vehicle endurance.

[0063] It should be noted that the above energy supply switching ratio threshold is based on the proportion of the energy value stored in the energy storage device in the total capacity of the energy storage device. The determination of the energy supply switching ratio threshold can be based on the specific functional requirements of the energy storage device in the fuel cell system, or it can be set based on the specific functional requirements during the implementation of the present scheme. For example, in some implementable environments of the present application, the specific value of the energy supply switching ratio threshold can be 10% of the total capacity of the energy storage device. The above energy supply switching ratio threshold is only an example value, and the specific determination method of the energy supply switching ratio threshold and the specific value of the energy supply switching ratio threshold are not limited herein.

[0064] Please refer to Figure 3 , Figure 3 is a specific fuel cell system architecture diagram shown by an exemplary embodiment of the present application.

[0065] Please refer to Figure 4 , Figure 4 is a specific fuel cell output power control method diagram shown by an exemplary embodiment of the present application.

[0066] As shown in Figure 3 , Figure 4 , in one specific embodiment of the present application, the fuel cell output power control method based on the fuel cell system architecture specifically includes the following description:

[0067] In one specific embodiment of the present application, the above fuel cell system includes an air filter 1, an air compressor 2, an intercooler 3, a bypass valve 4, a membrane humidifier 5, a throttle valve 6, a flywheel energy storage device 7, a flywheel energy storage device control unit 8, an exhaust valve 9, a power battery 10, a power battery BMS 11, a DC-DC boost module 12, a fuel cell stack 13, a fuel cell control unit FCCU 14, a cooling water system 15, a vehicle control system 16, and various component-related connecting pipelines and cables.

[0068] In one specific embodiment of the present application, the path of air entering the fuel cell stack is air filter 1, air compressor 2, intercooler 3, bypass valve 4, membrane humidifier 5, throttle valve 6, and fuel cell stack 13 in sequence. It should be noted that when there is no redundant air flow introduction, the pipeline leading to the flywheel energy storage device 7 of the bypass valve 4 is closed by default.

[0069] In one specific embodiment of the present application, when the fuel cell vehicle is in operation, the vehicle control system 16 feeds back the real-time power demand P1 of the vehicle at this time, reads the fuel cell control unit FCCU 14 to obtain whether the stack is started at this time. If the FCCU 14 feedbacks that the stack is not started at this time, return to detect the fuel cell running state of the fuel cell.

[0070] In one embodiment of the present application, if the FCCU 14 feedbacks that the stack has started up at this time, the output power of the stack at this time in the fuel cell is first regulated according to the single cell voltage collected by the CVM (fuel cell stack inspection), and the output power is controlled to the minimum output power P2 that meets the safety voltage when all single cell voltages are lower than 0.85V. The vehicle demand power P1 fed back by the vehicle control system is compared with the minimum output power P2 of the safety voltage of the stack at this time. The CVM is a fuel cell stack inspection, which is connected to the single fuel cell on the fuel cell stack through the inspection signal collection line to realize voltage collection. In the voltage inspection, the voltage is transmitted to the communication tool through the inspection communication line bundle, and finally connected to the upper computer through the communication tool, to directly monitor or record the collected single cell voltage of the stack.

[0071] It should be noted that, since the single cell of the fuel cell stack may fluctuate at any time, the single cell voltage of the stack may be higher than the safety voltage at one time and lower than the safety voltage at another time. In order to avoid frequent action of the control system, the average value of the single cell voltage collected by the CVM in 5s is taken as the control value. The collection voltage value cycle of the CVM (fuel cell stack inspection) is only an exemplary example that can be implemented, and the collection voltage value cycle of the CVM (fuel cell stack inspection) is not specifically limited herein.

[0072] In one embodiment of the present application, when the vehicle demand power P1≥ the minimum output power P2 of the safety voltage, the vehicle running state at this time is a normal state, and the FCCU 14 controls the fuel cell output power P3 to follow the real-time demand power of the vehicle, and the fuel cell output power P3=vehicle demand power P1.

[0073] In one embodiment of the present application, when the vehicle demand power P1P2, the vehicle running state at this time is an idle state. The vehicle control system 16 obtains the energy storage state of the flywheel energy storage device and the SOC of the power battery at this time through the feedback of the flywheel energy storage device control unit 8 and the power battery BMS 11. In one embodiment of the present application, when the BMS 11 feedbacks that the remaining power SOC of the power battery is less than the power control threshold 90%, the BMS 11 controls to charge the power battery with the fuel cell charging power P4, and at this time the FCCU 14 controls the fuel cell output power P3=P1+P4, and P3≥P2.

[0074] In one embodiment of the application, when the SOC of the power battery is greater than or equal to 90% of the power control threshold, the BMS 11 controls to stop charging the power battery. If the vehicle is still in idle state at this time, and the flywheel energy storage device control unit 8 feedbacks that it has not reached the upper limit of energy storage, the flywheel energy storage device control unit 8 controls the energy storage device to operate at a power P5, at this time the FCCU 14 controls the fuel cell to output a power P3 = P1 + P5, and P3 ≥ P2.

[0075] In one embodiment of the application, when the SOC of the power battery is greater than or equal to 90% and the flywheel energy storage device reaches its upper limit of energy storage, the vehicle control system 16 controls the air compressor to additionally increase the energy storage incremental power P6. In order to ensure that the amount of air entering the air tank remains unchanged, the bypass valve 4 on the air system intake pipeline and the exhaust valve 9 connected to the outlet of the flywheel energy storage device are opened, and the excess air flow is introduced into the flywheel energy storage device 7 through the bypass valve. The direction of the air flow is opposite to the direction of rotation of the flywheel, so as to slow down the flywheel. In order to ensure that the energy stored in the flywheel energy storage device 7 remains unchanged, the flywheel drive motor is controlled to operate at the energy storage device operating power P5. At this time, the FCCU 14 controls the fuel cell to output a power P3 = P1 + P5 + P6, and P3 ≥ P2.

[0076] Please refer to Figure 5 , Figure 5 is a specific power supply switching control method diagram shown in one exemplary embodiment of the application.

[0077] In one embodiment of the application, when the vehicle is switched from idle state to normal state, the flywheel energy storage device control unit 8 feedbacks the energy stored in the flywheel energy storage device at this time.

[0078] In one embodiment of the application, when the energy stored in the flywheel energy storage device is greater than 10% of the power supply switching proportion threshold, the main energy source of the vehicle at this time is controlled to be the energy storage device.

[0079] In one embodiment of the application, when the energy stored in the flywheel energy storage device is less than or equal to 10% of the power supply switching proportion threshold, the main energy source of the vehicle at this time is controlled to be the fuel cell.

[0080] The fuel cell output power control method in the embodiment of the present application, by obtaining the energy storage device operating power, the vehicle demand power and the minimum output power of the safety voltage, if the minimum output power of the safety voltage is greater than or equal to the vehicle demand power, it is determined to be an idle state, and the current energy storage state and the power battery remaining capacity are listened to, if it is an energy storage saturation state, and the power battery remaining capacity is greater than or equal to the power control threshold, the energy storage device power is increased, and the energy storage incremental power is determined, when the sum of the energy storage incremental power, the energy storage device operating power and the vehicle demand power is greater than or equal to the minimum output power of the safety voltage, the sum is determined as the fuel cell output power; the method can adjust the energy storage device power according to the energy storage state when the vehicle is in an idle state, store or offset the redundant power, determine the fuel cell output power, ensure that the fuel cell output is consistent with the consumption of the energy storage device in the idle state, and realize the zero output of the vehicle power; the beneficial effects can also be provided, including determining different power adjustment strategies according to the determination result of the energy storage state and the size of the power battery remaining capacity, improving the storage selection and control of the vehicle energy storage device power under the premise of ensuring the zero output of the vehicle power in the idle state, facilitating the recovery of the redundant power; detecting the vehicle operating state, controlling the power output in the idle state in time, so as to control the vehicle in the idle state, and avoid damaging the fuel cell; selecting the current vehicle power supply device based on the energy storage ratio of the energy storage device when the vehicle operating state changes to a normal state, facilitating the improvement of the vehicle endurance; detecting the safety operating voltage threshold of the vehicle when the safety operating voltage is met, and taking the safety operating voltage threshold as the minimum power required under the safety voltage, effectively controlling the safety voltage of the fuel cell, protecting the safety of the voltage environment of the fuel cell, and avoiding the damage of the fuel cell caused by the high voltage open circuit state.

[0081] The device embodiment of the present application is introduced below, which can be used to execute the fuel cell output power control method in the above-mentioned embodiments of the present application. For details not disclosed in the device embodiment of the present application, please refer to the above-mentioned embodiments of the fuel cell output power control method.

[0082] Figure 6 It is a fuel cell output power control device schematic diagram shown in an exemplary embodiment of the present application. The device can be applied to Figure 2 The implementation environment shown in the embodiment. The device can also be applied to other exemplary implementation environments, and specifically configured in other equipment, and the embodiment does not limit the implementation environment to which the device is applied.

[0083] As Figure 6 shown, the exemplary fuel cell output power control device includes: an operating parameter acquisition module 601, an operating state determination module 602, and a power adjustment module 603.

[0084] The running parameter acquisition module 601 is configured to acquire the energy storage device running power, the vehicle demand power and the minimum output power of the safety voltage; the running state determination module 602 is configured to determine that the vehicle running state is an idle state if the minimum output power of the safety voltage is greater than or equal to the vehicle demand power, and monitor the current energy storage state of the energy storage device and the remaining power of the power battery; the power adjustment module 603 is configured to control to increase the energy storage device running power if the current energy storage state is an energy storage saturation state and the remaining power of the power battery is greater than or equal to the power control threshold, and determine the energy storage increment power of the energy storage device; and when the sum of the energy storage increment power, the energy storage device running power and the vehicle demand power is greater than or equal to the minimum output power of the safety voltage, the sum of the energy storage increment power, the energy storage device running power and the vehicle demand power is determined as the fuel cell output power, so that the vehicle power output under the safety voltage is zero when the vehicle running state is the idle state.

[0085] Embodiments of the present application also provide an electronic device, comprising: one or more processors; a storage device configured to store one or more programs, when the one or more programs are executed by the one or more processors, the electronic device implements the fuel cell output power control method provided in each of the above embodiments.

[0086] Figure 7 is a structural schematic diagram of a computer system of an electronic device shown in an exemplary embodiment of the present application. It should be noted that, Figure 7 The computer system 700 of the electronic device shown is only an example, and should not bring any limitation to the functions and use range of the embodiments of the present application.

[0087] As Figure 7 shown, the computer system 700 includes a central processing unit (CPU) 701, which can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 702 or programs loaded from a storage part into a random access memory (RAM) 703, such as performing the method in the above embodiments. In the RAM 703, various programs and data required for system operation are also stored. The CPU 701, the ROM 702 and the RAM 703 are connected to each other through a bus. An input / output (I / O) interface 705 is also connected to the bus 704.

[0088] The following components are connected to the I / O interface 705: an input part 706 including a keyboard, a mouse, etc.; an output part 707 including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), etc., and a speaker, etc.; a storage part 708 including a hard disk, etc.; and a communication part 709 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication part performs communication processing via a network such as the Internet. A drive is also connected to the I / O interface 705 as necessary. A removable medium 711 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc. is attached to the drive 710 as necessary, so that a computer program read out therefrom is installed in the storage part 708 as necessary.

[0089] In particular, according to embodiments of the present application, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, embodiments of the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing a computer program for executing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via the communication part 709, and / or installed from the removable medium 711. When the computer program is executed by the central processing unit (CPU) 701, various functions defined in the system of the present application are executed.

[0090] It should be noted that the computer-readable medium in the embodiments of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination thereof. The computer-readable storage medium may, for example, be an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination thereof. More specific examples of the computer-readable storage medium can include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this application, the computer-readable signal medium can include a data signal propagated in a baseband or as a carrier wave in a propagated data signal, in which the computer-readable computer program is carried. Such a propagated data signal can take on many forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium other than the computer-readable storage medium, which can send, propagate, or transmit the program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted in any suitable medium, including but not limited to wireless, wired, or the like, or any suitable combination thereof.

[0091] The flowcharts and block diagrams in the drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present application. Each block in the flowcharts or block diagrams can represent a module, a program segment, or a portion of code, which contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur in a different order than that shown in the figures. For example, two blocks noted in succession can actually be executed substantially concurrently, or they can sometimes be executed in reverse order, depending on the functionality involved. It should also be noted that each block in the flowcharts or block diagrams, and combinations of blocks in the flowcharts or block diagrams, can be implemented by special-purpose hardware-based systems, which perform the specified functions or operations, or can be implemented by a combination of special-purpose hardware and computer instructions.

[0092] In the corresponding drawings of the above-described embodiments, connection lines can represent connection relationships between various components to represent more constituent signal paths and / or one or more ends of some lines have arrows to represent the main information flow direction. The connection lines serve as an identification and are not a limitation on the scheme itself. Using these lines in conjunction with one or more example embodiments helps to more easily trace the circuit or logic unit. Any represented signals (determined by design requirements or preferences) can actually include one or more signals that can be transmitted in either direction and can be implemented in any appropriate type of signal scheme.

[0093] The units described in the embodiments of the present application can be implemented by software, or by hardware, or by a combination of software and hardware. The units described can also be located in a single processor. In some cases, the names of the units do not limit the units themselves.

[0094] Another aspect of the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method described above. The computer readable storage medium can be included in the electronic device described in the above embodiments, or can exist separately and not be assembled into the electronic device.

[0095] It should be noted that although several modules or units of the device for action execution are mentioned in the above detailed description, such division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into several modules or units.

[0096] From the above description of the embodiments, those skilled in the art will readily appreciate that the example embodiments described herein can be implemented by software and / or by software in combination with the necessary hardware. Therefore, the technical solutions according to the embodiments of the present application can be embodied in the form of a software product. The software product can be stored in a non-volatile storage medium (which can be a CD-ROM, a U disk, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) to perform the methods according to the embodiments of the present application.

[0097] It is appreciated that the application can be employed in a variety of general purpose or special purpose computing system environments or configurations. Examples of well- known computing systems, environments, and / or configurations that can be suitable for use with the application include, but are not limited to, personal computers, server computers, handheld or laptop devices, tablet devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like.

[0098] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope of the application being indicated by the following claims.

[0099] It should be understood that the above description is only one example of implementation and is not intended to limit the scope of the application. One of ordinary skill in the art will readily recognize various alternative or additional methods, structures, devices, and / or functions that can be employed in accordance with the principles of the present application. Accordingly, the present application is not intended to be limited to the examples described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of controlling the output power of a fuel cell, characterized by, The fuel cell output power control method comprises: acquiring the energy storage device operating power, the vehicle demand power and the minimum output power of the safety voltage; if the minimum output power of the safety voltage is greater than or equal to the vehicle demand power, determining that the vehicle operating state is an idle state, and monitoring the current energy storage state of the energy storage device and the residual power of the power battery; if the current energy storage state is an energy storage saturation state and the residual power of the power battery is greater than or equal to the power control threshold, controlling to increase the energy storage device operating power, and determining the energy storage incremental power of the energy storage device, wherein the energy storage incremental power is the power amount increased after the energy storage device operating power is increased, the energy storage device comprises an air compressor, an air supply system and a flywheel driving motor, the air compressor operating power is controlled to be increased, the air supply system is controlled to introduce airflow to the flywheel driving motor, and the incremental airflow introduced after the air compressor operating power is increased is discharged, the direction of the airflow is opposite to the flywheel rotation direction of the flywheel driving motor, and the incremental power of the air compressor operating power is monitored and determined as the energy storage incremental power of the energy storage device; when the sum of the energy storage incremental power, the energy storage device operating power and the vehicle demand power is greater than or equal to the minimum output power of the safety voltage, the sum of the energy storage incremental power, the energy storage device operating power and the vehicle demand power is determined as the fuel cell output power, so that the vehicle power output under the safety voltage is zero when the vehicle operating state is the idle state.

2. The fuel cell output power control method according to claim 1, characterized by, The current energy storage state comprises an energy storage saturation state and an energy storage unsaturated state, after monitoring the current energy storage state of the energy storage device and the residual power of the power battery, the fuel cell output power control method further comprises: if the current energy storage state is an energy storage unsaturated state and the residual power of the power battery is greater than or equal to the power control threshold, comparing the sum of the energy storage device operating power and the vehicle demand power with the minimum output power of the safety voltage; when the sum of the energy storage device operating power and the vehicle demand power is greater than or equal to the minimum output power of the safety voltage, the sum of the energy storage device operating power and the vehicle demand power is determined as the fuel cell output power.

3. The fuel cell output power control method according to claim 1, characterized by, After monitoring the current energy storage state of the energy storage device and the residual power of the power battery, the fuel cell output power control method further comprises: if the residual power of the power battery is less than the power control threshold, controlling the fuel cell to charge the power battery, and acquiring the fuel cell charging power; when the sum of the fuel cell charging power and the vehicle demand power is greater than or equal to the minimum output power of the safety voltage, the sum of the fuel cell charging power and the vehicle demand power is determined as the fuel cell output power.

4. The fuel cell output power control method according to claim 1, characterized by, The vehicle operating state comprises an idle state and a normal state, after acquiring the energy storage device operating power, the vehicle demand power and the minimum output power of the safety voltage, the fuel cell output power control method further comprises: If the safe voltage minimum output power is less than the vehicle demand power, it is determined that the vehicle operating state is a normal state, and the vehicle demand power is determined as the fuel cell output power.

5. The fuel cell output power control method according to claim 1, characterized by, After determining the fuel cell output power as the sum of the energy storage increment power, the energy storage device operating power and the vehicle demand power, the fuel cell output power control method further comprises: If the vehicle operating state is changed from the idle state to the normal state, the current energy storage ratio of the energy storage device is obtained; If the current energy storage ratio is greater than the energy supply switching ratio threshold, the energy storage device is determined as the vehicle energy supply device.

6. The fuel cell output power control method according to claim 5, characterized by, After obtaining the current energy storage amount of the energy storage device, the fuel cell output power control method further comprises: If the current energy storage ratio is less than or equal to the energy supply switching ratio threshold, the fuel cell is determined as the vehicle energy supply device.

7. The fuel cell output power control method according to claim 1, characterized by, Before obtaining the energy storage device operating power, the vehicle demand power and the safe voltage minimum output power, the fuel cell output power control method further comprises: detecting the fuel cell operating state, wherein the fuel cell operating state comprises running and shutting down; If the fuel cell operating state is running, the current safe voltage power of each device in the fuel cell system is monitored; The sum of the current safe voltage power of each device in the fuel cell system is determined as the safe voltage minimum output power.

8. The fuel cell output power control method according to claim 7, characterized by, Before monitoring the current safe voltage power of each device in the fuel cell system, the fuel cell output power control method further comprises: obtaining the current device operating voltage of each device in the fuel cell system; If there is a current device operating voltage greater than or equal to the safe operating voltage threshold, the current device operating voltage is controlled to be less than the safe operating voltage threshold; When each current device operating voltage is less than the safe operating voltage threshold, the current safe voltage power of each device in the fuel cell system is monitored.

9. A fuel cell output power control device, characterized in that, The fuel cell power control device comprises: an operating parameter obtaining module for obtaining the energy storage device operating power, the vehicle demand power and the safe voltage minimum output power; an operating state determining module for determining the vehicle operating state as an idle state if the safe voltage minimum output power is greater than or equal to the vehicle demand power, and monitoring the current energy storage state of the energy storage device and the remaining power of the power battery; The power regulation module is configured to, if the current energy storage state is an energy storage saturation state and the remaining power of the power battery is greater than or equal to the power control threshold, control the increase of the operating power of the energy storage device, and determine the energy storage incremental power of the energy storage device, wherein the energy storage device comprises an air compressor, an air supply system and a flywheel driving motor, the operating power of the air compressor is controlled to be increased, the air supply system is controlled to introduce airflow to the flywheel driving motor, and the incremental airflow introduced after the increase of the operating power of the air compressor is discharged, the direction of the airflow is opposite to the rotation direction of the flywheel of the flywheel driving motor, the incremental power of the operating power of the air compressor is monitored, and the incremental power of the operating power of the air compressor is determined as the energy storage incremental power of the energy storage device, and when the sum of the energy storage incremental power, the operating power of the energy storage device and the power required by the whole vehicle is greater than or equal to the minimum output power of the safe voltage, the sum of the energy storage incremental power, the operating power of the energy storage device and the power required by the whole vehicle is determined as the fuel cell output power, and the whole vehicle power output under the safe voltage is zero when the vehicle operating state is an idle state.

10. An electronic device, comprising: Comprise: One or more processors; A storage device for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the fuel cell output power control method according to any one of claims 1 to 8.

11. A computer readable storage medium, characterized in that, A computer readable instruction is stored thereon, when the computer readable instruction is executed by the processor of the computer, the computer executes the fuel cell output power control method according to any one of claims 1 to 8.

Images