Power variable load method, device and electronic equipment for hybrid electric vehicle

Abstract

The application discloses a power variable load method and device of a hybrid electric vehicle and electronic equipment. The method comprises the following steps: in response to a power variable load request, determining a first power difference value between a target power and a first running power of the hybrid electric vehicle; determining a target intake pressure value of a flow control valve, a target pressure difference value of a pressure difference control module, a first rotating speed of a hydrogen pump and a first opening and closing frequency of an exhaust and drainage valve according to the first power difference value; controlling the intake flow, the pressure difference value, the rotating speed of the hydrogen pump and the opening and closing of the exhaust and drainage valve; receiving a second running power of the hybrid electric vehicle; when a difference value between the second running power and the target power is within a predetermined difference threshold value, obtaining a result of completing the variable load of the hybrid electric vehicle, determining a second rotating speed and a second opening and closing frequency, so that the hybrid electric vehicle runs at the second running power. The application solves the technical problem of insufficient gas in the variable load process of the power variable load of the hybrid electric vehicle in the related art.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power automobiles, in particular to a power variable load method and device of a hybrid power automobile and an electronic device. BACKGROUND

[0002] At present, the hydrogen circulation architecture of a fuel cell system and the circulation control based on the architecture are key factors affecting the durability of the system. In order to further improve the power variable load rate of the hybrid power automobile, a control strategy needs to be made for the hydrogen circulation architecture. However, in the related art, when the power variable load of the hybrid power automobile is performed by using the related method, the problem of insufficient gas in the variable load process is prone to occur.

[0003] At present, no effective solution has been proposed for the above problem. SUMMARY

[0004] The embodiments of the present application provide a power variable load method and device of a hybrid power automobile and an electronic device, so as to at least solve the technical problem of insufficient gas in the variable load process when the power variable load of the hybrid power automobile is performed in the related art.

[0005] According to an aspect of the embodiments of the present application, a power variable load method of a hybrid power automobile is provided, including: in response to a power variable load request, determining a first power difference value between a target power of the hybrid power automobile and a first running power; determining a target inlet pressure value of a flow control valve in a hydrogen circulation system, a target pressure difference value of a pressure difference control module, a first rotating speed of a hydrogen pump and a first opening and closing frequency of an exhaust and drainage valve according to the first power difference value, wherein the pressure difference control module is used to control a pressure difference value between an inlet point and an exhaust point, the inlet point is located at an inlet position of an electric pile in the hydrogen circulation system, and the exhaust point is located at an outlet position of the electric pile; controlling an inlet flow based on the target inlet pressure value by using the flow control valve, controlling the pressure difference value based on the target pressure difference value by using the pressure difference control module, controlling the rotating speed based on the first rotating speed by using the hydrogen pump, and controlling the opening and closing based on the first opening and closing frequency by using the exhaust and drainage valve; receiving a second running power of the hybrid power automobile; in a case that a second power difference value between the second running power and the target power is within a predetermined difference threshold value, obtaining a result of completing the power variable load of the hybrid power automobile, and determining a second rotating speed of the hydrogen pump and a second opening and closing frequency of the exhaust and drainage valve, so that the hybrid power automobile continuously runs at the second running power, wherein the second rotating speed is lower than the first rotating speed, and the second opening and closing frequency is lower than the first opening and closing frequency.

[0006] Optionally, the determining the target intake pressure value of the flow control valve, the target pressure difference value of the pressure difference control module, the first rotating speed of the hydrogen pump and the first opening and closing frequency of the exhaust and drainage valve in the hydrogen circulation system according to the first power difference value comprises: determining a difference value interval to which the first power difference value belongs; and retrieving the target intake pressure value, the target pressure difference value, the first rotating speed and the first opening and closing frequency corresponding to the difference value interval.

[0007] Optionally, the determining the first rotating speed of the hydrogen pump according to the first power difference value comprises: determining a hydrogen pump equipment parameter of the hydrogen pump; and determining the first rotating speed according to the first power difference value and the hydrogen pump equipment parameter.

[0008] Optionally, the determining the first opening and closing frequency of the exhaust and drainage valve according to the first power difference value comprises: determining a target exhaust pressure value according to the target pressure difference value and the target intake pressure value; and determining the first opening and closing frequency according to the target exhaust pressure value.

[0009] Optionally, the determining the target intake pressure value of the flow control valve, the target pressure difference value of the pressure difference control module, the first rotating speed of the hydrogen pump and the first opening and closing frequency of the exhaust and drainage valve in the hydrogen circulation system according to the first power difference value comprises: in the case that the exhaust and drainage valve comprises an exhaust valve and a drainage valve and the first opening and closing frequency comprises an exhaust opening and closing frequency and a drainage opening and closing frequency, determining the target intake pressure value, the target pressure difference value, the first rotating speed, the exhaust opening and closing frequency of the exhaust valve and the drainage opening and closing frequency of the drainage valve according to the first power difference value.

[0010] Optionally, the method further comprises: receiving pressure values corresponding to the intake point and the exhaust point respectively; in the case that there is a pressure value greater than a predetermined threshold value in the corresponding pressure values, determining a pressure relief control pressure value of a pressure relief valve in the hydrogen circulation system; and controlling the pressure relief pressure of the pressure relief valve based on the pressure relief control pressure value until the pressure values corresponding to the intake point and the exhaust point respectively are less than or equal to the predetermined threshold value.

[0011] Optionally, after the determining the second rotating speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drainage valve, the method further comprises: controlling the rotating speed of the hydrogen pump based on the second rotating speed and controlling the opening and closing of the exhaust and drainage valve based on the second opening and closing frequency.

[0012] According to an aspect of an embodiment of the present application, there is provided a power load changing device of a hybrid vehicle, comprising: a first determining module configured to determine a first power difference between a target power and a first running power of the hybrid vehicle in response to a power load changing request; a second determining module configured to determine a target inlet pressure value of a flow control valve in a hydrogen circulation system, a target pressure difference value of a pressure difference control module, a first rotating speed of a hydrogen pump and a first opening and closing frequency of an exhaust and drainage valve according to the first power difference, wherein the pressure difference control module is configured to control a pressure difference between an inlet point and an exhaust point, the inlet point being located at an inlet position of a stack in the hydrogen circulation system, and the exhaust point being located at an outlet position of the stack; a control module configured to control an inlet flow based on the target inlet pressure value by using the flow control valve, control a pressure difference based on the target pressure difference value by using the pressure difference control module, control a rotating speed based on the first rotating speed by using the hydrogen pump, and control opening and closing based on the first opening and closing frequency by using the exhaust and drainage valve; a receiving module configured to receive a second running power of the hybrid vehicle; and a third determining module configured to obtain a result that the power load changing of the hybrid vehicle is completed, determine a second rotating speed of the hydrogen pump and a second opening and closing frequency of the exhaust and drainage valve to enable the hybrid vehicle to continuously run at the second running power, in a case that a second power difference between the second running power and the target power is within a predetermined difference threshold.

[0013] According to an aspect of an embodiment of the present application, there is provided an electronic device, comprising: a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to execute the instructions to implement the power load changing method of the hybrid vehicle according to any one of the preceding aspects.

[0014] According to an aspect of an embodiment of the present application, there is provided a computer readable storage medium, comprising: instructions stored in the computer readable storage medium, when executed by a processor of an electronic device, cause the electronic device to perform the power load changing method of the hybrid vehicle according to any one of the preceding aspects.

[0015] In the embodiment of the present application, in response to a power variable load request, a first power difference value between a target power of the hybrid vehicle and a first operating power is determined, and a target intake pressure value of a flow control valve in a hydrogen circulation system, a target pressure difference value of a pressure difference control module, a first rotating speed of a hydrogen pump and a first opening and closing frequency of an exhaust and drainage valve are determined according to the first power difference value, wherein the pressure difference control module is used to control a pressure difference value between an intake point and an exhaust point, the intake point is located at an inlet position of the electric pile in the hydrogen circulation system, and the exhaust point is located at an outlet position of the electric pile. The intake flow is controlled by the flow control valve based on the target intake pressure value, the pressure difference value is controlled by the pressure difference control module based on the target pressure difference value, the rotating speed is controlled by the hydrogen pump based on the first rotating speed, and the opening and closing are controlled by the exhaust and drainage valve based on the first opening and closing frequency. The second operating power of the hybrid vehicle is received, and in the case that a second power difference value between the second operating power and the target power is within a predetermined difference threshold value, a result of the power variable load completion of the hybrid vehicle is obtained, and a second rotating speed of the hydrogen pump and a second opening and closing frequency of the exhaust and drainage valve are determined to enable the hybrid vehicle to continuously operate at the second operating power, wherein the second rotating speed is lower than the first rotating speed, and the second opening and closing frequency is lower than the first opening and closing frequency. Since the first rotating speed of the hydrogen pump and the first opening and closing frequency of the exhaust and drainage valve are determined to be higher than the power in the case that the hybrid vehicle operates at the target power, the circulation of the hydrogen circulation system can be accelerated, and the rate of the power of the hybrid vehicle from the first operating power to the target power can be increased. After the power of the hybrid vehicle reaches the second operating power which is the same as or adjacent to the target power, the rotating speed of the hydrogen pump and the opening and closing frequency of the exhaust and drainage valve are adjusted to the second rotating speed and the second opening and closing frequency, so that the hybrid vehicle can continuously operate at the second operating power. To some extent, the power variable load request of the hybrid vehicle can be quickly responded, so that the variable load speed of the power variable load of the hybrid vehicle is improved. Moreover, since the pressure difference value between the intake point and the exhaust point is controlled by the pressure difference control module based on the target pressure difference value, the pressure difference value between the intake point and the exhaust point meets the required pressure difference value under the target power, so that the technical problem of the anode "gas shortage" in the electric pile in the hydrogen circulation system in a short time during the power variable load of the hybrid vehicle is solved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0017] Figure 1 is a flow chart of a power variable load method of a hybrid vehicle according to an embodiment of the present application;

[0018] Figure 2is a component structure diagram of a hydrogen circulation system provided by an optional embodiment of the present application;

[0019] Figure 3 is a first strategy diagram of controlling power variable load of a hydrogen circulation system provided by an optional embodiment of the present application;

[0020] Figure 4 is a second strategy diagram of controlling power variable load of a hydrogen circulation system provided by an optional embodiment of the present application;

[0021] Figure 5 is a third strategy diagram of controlling power variable load of a hydrogen circulation system provided by an optional embodiment of the present application;

[0022] Figure 6 is a structure block diagram of a power variable load device of a hybrid electric vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0024] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] Embodiment 1

[0026] According to an embodiment of the present application, an embodiment of a power variable load method of a hybrid electric vehicle is provided. It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that herein.

[0027] Figure 1 This is a flowchart of a power load variation method for a hybrid electric vehicle according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0028] Step S102: In response to the power load change request, determine the first power difference between the target power of the hybrid vehicle and the first operating power;

[0029] In step S102 provided in this application, the aforementioned power load change request is a request for power load change that the hybrid vehicle needs to make. The aforementioned power load change request can be a power load change request of the hybrid vehicle, which can include a power load increase request and a power load decrease request. The power load increase request can be received in response to the user's operation of pressing the accelerator, and the power load decrease request can be received in response to the user's operation of pressing the brake. The controller can give the user's operation to determine what power to adjust the power to, that is, it can determine the target power to be achieved.

[0030] The aforementioned target power can be the target power that the hybrid vehicle needs to achieve through power load change during the power load change process, that is, it can be a preset power. The aforementioned first operating power can be the current operating power of the hybrid vehicle before receiving the power load change request from the hybrid vehicle.

[0031] It should be noted that, in response to the power load change request of the hybrid vehicle, the target power and the first operating power of the hybrid vehicle are obtained. Based on the difference between the target power and the first operating power, the first power difference is determined. By determining the first power difference, it is possible to further analyze whether the hybrid vehicle needs to increase or decrease its power, so as to accurately determine the power load change situation of the hybrid vehicle.

[0032] Step S104: Based on the first power difference, determine the target inlet pressure value of the flow control valve in the hydrogen circulation system, the target pressure difference value of the differential pressure control module, the first speed of the hydrogen pump, and the first opening and closing frequency of the exhaust and drain valve. The differential pressure control module is used to control the pressure difference between the inlet point and the exhaust point. The inlet point is located at the inlet position of the fuel cell stack in the hydrogen circulation system, and the exhaust point is located at the outlet position of the fuel cell stack.

[0033] In step S104 provided in this application, the aforementioned hydrogen recirculation system may refer to the hydrogen fuel cell system in a hybrid electric vehicle, and the aforementioned flow control valve may be a hydrogen recirculation system used to regulate the hydrogen flow rate and control the hydrogen flow distribution.

[0034] The target intake pressure value can be set according to the first power difference value and the equipment requirement of the hydrogen circulation system, and the target pressure difference value is not limited herein, which can be determined according to the first power difference value and the pressure requirement between the intake point and the exhaust point. The pressure control module can adjust the pressure difference between the intake point and the exhaust point according to the target pressure difference value.

[0035] The first rotating speed of the hydrogen pump can be adjusted according to the first power difference value and the target power, so as to adjust the rotating speed of the hydrogen pump to meet the supply requirement of hydrogen. In this step, the rotating speed of the hydrogen pump is adjusted, and the flow of hydrogen can be further controlled.

[0036] The first opening and closing frequency of the exhaust and drainage valve can be used to control the frequency of drainage and exhaust of the exhaust and drainage valve in the hydrogen circulation system, which can be determined according to the first power difference value.

[0037] It should be noted that, according to the first power difference value, the target intake pressure value and the first rotating speed of the hydrogen pump are adjusted, which can ensure the stable operation of the hydrogen circulation system and better meet the target power requirement of the hybrid vehicle.

[0038] It should be further noted that, by adjusting the rotating speed of the hydrogen pump to a higher rotating speed and the opening and closing frequency of the exhaust and drainage valve to a higher opening and closing frequency, more hydrogen can be provided for the hydrogen circulation system, which can support the rapid load change process.

[0039] In step S106, the flow control valve is used to control the intake flow based on the target intake pressure value, the pressure difference control module is used to control the pressure difference based on the target pressure difference value, the hydrogen pump is used to control the rotating speed based on the first rotating speed, and the exhaust and drainage valve is used to control the opening and closing based on the first opening and closing frequency.

[0040] In step S106 provided in the present application, the target intake pressure value determined in the foregoing steps is used to adjust the intake flow of hydrogen by using the flow control valve to meet the target intake pressure value. In this step, the opening degree of the flow control valve can be adjusted according to the first power difference value to achieve the required intake flow.

[0041] The target pressure difference value determined in the foregoing steps is used to adjust the pressure difference between the intake point and the exhaust point by using the pressure difference control module. In this step, the reference value of the pressure difference control module can be set according to the target pressure difference value, and the hydrogen flow is adjusted by the pressure difference control module to maintain the required pressure difference value of the hydrogen circulation system.

[0042] Based on the first rotation speed determined in the foregoing step, the rotation speed of the hydrogen pump is adjusted to reach the first rotation speed required under the first power difference condition by using the hydrogen pump; based on the first opening and closing frequency determined in the foregoing step, the process of exhausting and draining in the hydrogen circulation system can be controlled by using the exhaust and drain valve, in which the first opening and closing frequency of the exhaust and drain valve can be set as a reference value, and the frequency and flow of the exhaust and drainage can be controlled by the opening and closing of the flow control valve.

[0043] It should be noted that by controlling the target intake pressure value, the target pressure difference value, the first rotation speed of the hydrogen pump and the first opening and closing frequency in the foregoing step, the supply of hydrogen and the adjustment of pressure can be accurately controlled to a certain extent, so that the hydrogen circulation system can adapt to different power requirements and ensure the normal operation of the hydrogen circulation system.

[0044] It should be further noted that after the flow control valve controls the intake flow based on the target intake pressure value, the pressure difference control module controls the pressure difference value based on the target pressure difference value, the hydrogen pump controls the rotation speed based on the first rotation speed, and the exhaust and drain valve controls the opening and closing based on the first opening and closing frequency, the controller can automatically read that the above-mentioned devices in the hydrogen circulation system have adopted the corresponding control strategy. When the controller monitors that the hydrogen circulation system has been running using the above-mentioned strategy, the current load is pulled, and the operating power of the hybrid electric vehicle changes so that the subsequent second operating power is received.

[0045] Step S108, receiving the second operating power of the hybrid electric vehicle;

[0046] In the step S108 provided in the present application, the second operating power can refer to the actual power that the hybrid electric vehicle can achieve after the target intake pressure value, the target pressure difference value, the first rotation speed of the hydrogen pump and the first opening and closing frequency in the foregoing step are controlled. The specific power value of the second operating power in the foregoing step is not limited herein and can be determined and adjusted according to the specific scene and the setting parameters in the hydrogen circulation system.

[0047] It should be noted that in the case of using the control devices such as the flow control valve, the pressure difference control module, the hydrogen pump and the exhaust and drain valve, the control and adjustment of the hydrogen circulation system can be realized, thereby affecting the power output of the hybrid electric vehicle, that is, by using the above-mentioned control mode, when the hydrogen circulation system reaches the predetermined working state in terms of meeting the target intake pressure value, the target pressure difference value and the first rotation speed of the hydrogen pump, the actual power of the hybrid electric vehicle, that is, the second operating power, is further determined.

[0048] By determining the second operating power of the hybrid vehicle, the second operating power that the hydrogen circulation system can actually reach under the conditions of the series of control parameter settings determined in the foregoing steps can be accurately determined. According to the second operating power and the first operating power in the foregoing steps, the power variable load process of the hybrid vehicle can be more effectively reflected to a certain extent.

[0049] In step S110, when the second power difference between the second operating power and the target power is within the predetermined difference threshold, a result that the power variable load of the hybrid vehicle is completed is obtained, and the second rotating speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drainage valve are determined, so that the hybrid vehicle can continuously operate at the second operating power, wherein the second rotating speed is lower than the first rotating speed, and the second opening and closing frequency is lower than the first opening and closing frequency.

[0050] In step S110 provided in the present application, the predetermined difference threshold can be a reference value determined according to the second power difference between the second operating power and the target power, indicating that the second operating power is close to the target power, which can be equal or within a certain error range. Herein, it is not limited, and can be customized according to specific scene and application requirements.

[0051] For the above steps, the second operating power of the hybrid vehicle can be compared with the target power set in advance to determine the second power difference therebetween. According to the predetermined difference threshold, it is determined whether the second power difference between the second operating power and the target power is within the predetermined difference threshold range. If the difference is within the predetermined difference threshold range, that is, the second operating power is close to the target power, a result that the power variable load of the hybrid vehicle is completed can be obtained. Further, the second rotating speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drainage valve can be adjusted, so that the hybrid vehicle can continuously operate at the second operating power. In this process, the second rotating speed is set to be lower than the first rotating speed, and the second opening and closing frequency is set to be lower than the first opening and closing frequency. The setting of the second rotating speed and the second opening and closing frequency is not limited herein, and can be customized according to specific scene and the first rotating speed and the first opening and closing frequency.

[0052] It should be noted that, while obtaining the result of the above-mentioned power load change of the hybrid vehicle, the second rotational speed of the hydrogen pump and the second opening and closing frequency of the exhaust drain valve can be adjusted as appropriate to enable the hybrid vehicle to continue operating at the second operating power, thereby enabling a quick response to the power load change request of the hybrid vehicle and improving the power load change speed of the hybrid vehicle. In the fuel cell system, a fast load change speed can reduce the occurrence of a hydrogen deficiency. A hydrogen deficiency refers to a situation in which the hydrogen supply in the fuel cell system is insufficient, which can lead to a decline in system performance or even a shutdown. A fast load change speed means that the system can respond more quickly to changes in load and adjust the hydrogen supply in a timely manner, thereby avoiding the occurrence of a hydrogen deficiency. In the fuel cell system, a hydrogen storage device is usually used to balance changes in load. Therefore, a fast load change speed can improve the flexibility and stability of the hydrogen supply and reduce the occurrence of a hydrogen deficiency.

[0053] Moreover, since the differential pressure control module is used to control the pressure difference value based on the target pressure difference value, the pressure difference value between the intake point and the exhaust point meets the required pressure difference value under the target power, and therefore the situation of "hydrogen deficiency" of the anode of the stack in the hydrogen circulation system for a short time will not occur.

[0054] By the steps S102-S110, in response to the power variable load request, a first power difference value between the target power of the hybrid vehicle and the first operating power is determined, and according to the first power difference value, a target intake pressure value of the flow control valve in the hydrogen circulation system, a target pressure difference value of the pressure difference control module, a first rotating speed of the hydrogen pump and a first opening and closing frequency of the exhaust and drainage valve are determined, wherein the pressure difference control module is used to control the pressure difference value between the intake point and the exhaust point, the intake point is located at the inlet position of the stack in the hydrogen circulation system, and the exhaust point is located at the outlet position of the stack. The intake flow is controlled by the flow control valve based on the target intake pressure value, the pressure difference value is controlled by the pressure difference control module based on the target pressure difference value, the rotating speed is controlled by the hydrogen pump based on the first rotating speed, and the opening and closing are controlled by the exhaust and drainage valve based on the first opening and closing frequency. The second operating power of the hybrid vehicle is received, and in the case that a second power difference value between the second operating power and the target power is within a predetermined difference threshold value, a result that the power variable load of the hybrid vehicle is completed is obtained, and a second rotating speed of the hydrogen pump and a second opening and closing frequency of the exhaust and drainage valve are determined, so that the hybrid vehicle continuously operates at the second operating power, wherein the second rotating speed is lower than the first rotating speed, and the second opening and closing frequency is lower than the first opening and closing frequency. Since the first rotating speed of the hydrogen pump and the first opening and closing frequency of the exhaust and drainage valve are determined first and are higher than the power in the case that the hybrid vehicle operates at the target power, the circulation of the hydrogen circulation system can be accelerated, and the rate of the power of the hybrid vehicle from the first operating power to the target power can be increased. After the power of the hybrid vehicle reaches the second operating power which is the same as or adjacent to the target power, the rotating speed of the hydrogen pump and the opening and closing frequency of the exhaust and drainage valve are adjusted back to the second rotating speed and the second opening and closing frequency, so that the hybrid vehicle continuously operates at the second operating power. To some extent, the power variable load request of the hybrid vehicle can be quickly responded, so that the variable load speed of the power variable load of the hybrid vehicle is improved. Moreover, since the pressure difference value between the intake point and the exhaust point meets the required pressure difference value at the target power by controlling the pressure difference value by the pressure difference control module based on the target pressure difference value, the case of short-time "anode gas starvation" of the stack in the hydrogen circulation system will not occur, and thus the technical problem of anode gas starvation in the variable load process of the power variable load of the hybrid vehicle in the related art is solved.

[0055] The above method of the embodiment is further introduced as follows.

[0056] As an optional embodiment, according to the first power difference value, the target intake pressure value of the flow control valve in the hydrogen circulation system, the target pressure difference value of the pressure difference control module, the first rotating speed of the hydrogen pump and the first opening and closing frequency of the exhaust and drainage valve are determined, comprising: determining the difference value interval to which the first power difference value belongs; and retrieving the target intake pressure value, the target pressure difference value, the first rotating speed and the first opening and closing frequency corresponding to the difference value interval.

[0057] In this embodiment, the above-mentioned difference interval can be a corresponding difference interval divided according to the first power difference between the target power of the target electric motor and the first operating power, and can be a pre-set difference interval. The difference interval is not limited herein and can be customized according to specific scenarios and applications.

[0058] For the above-mentioned steps, the target intake pressure value of the flow control valve in the hydrogen circulation system, the target pressure difference value of the pressure difference control module, the first rotating speed of the hydrogen pump, and the first opening and closing frequency of the exhaust and drainage valve can be retrieved according to the difference interval of the first power difference, that is, the first power difference calculated can be divided into a corresponding difference interval according to the pre-set difference interval, and then the target intake pressure value, the target pressure difference value, the first rotating speed, and the first opening and closing frequency corresponding to the difference interval are retrieved.

[0059] It should be noted that the retrieval process in the above-mentioned steps is specifically explained as follows: the target intake pressure value corresponding to the difference interval can be obtained by pre-setting the target intake pressure value or adjusting the rules according to experience; the target pressure difference value corresponding to the difference interval can be obtained by adjusting and obtaining the test data such as the pressure values at the intake point and the exhaust point; the first rotating speed corresponding to the difference interval can be obtained by selecting a suitable rotating speed according to the hydrogen pump equipment parameters; and the first opening and closing frequency corresponding to the difference interval can be obtained by adjusting and obtaining the design and performance requirements of the exhaust and drainage valve in the hydrogen circulation system.

[0060] It should be further noted that by determining the target intake pressure value, the target pressure difference value, the first rotating speed, and the first opening and closing frequency according to the difference interval to which the first power difference belongs, the control strategy of the hydrogen circulation system can be optimized to a certain extent to achieve more accurate variable load power regulation of the hybrid electric vehicle.

[0061] As an optional embodiment, the first rotating speed of the hydrogen pump is determined according to the first power difference, comprising: determining the hydrogen pump equipment parameters of the hydrogen pump; and determining the first rotating speed according to the first power difference and the hydrogen pump equipment parameters.

[0062] In this embodiment, the above-mentioned hydrogen pump equipment parameters can include the rated rotating speed range and power characteristics of the hydrogen pump, and the like, which can come from the technical rules, factory data, and the like of the hydrogen pump, and are not limited herein and can be selected according to specific equipment data.

[0063] It should be noted that, for the above steps, the equipment parameters of the hydrogen pump are first obtained, and then the first rotational speed of the hydrogen pump is determined according to the relationship between the first power difference and the hydrogen pump equipment parameters, for example, the power can increase with the increase of the rotational speed, that is, the first rotational speed of the hydrogen pump can be determined. By determining the hydrogen pump equipment parameters of the hydrogen pump, to a certain extent, it can ensure that the hydrogen supply is sufficient to meet the power demand of the hybrid vehicle.

[0064] As an optional embodiment, the first opening and closing frequency of the exhaust and drainage valve is determined according to the first power difference, including: determining the target exhaust pressure value according to the target pressure difference value and the target intake pressure value; and determining the first opening and closing frequency according to the target exhaust pressure value.

[0065] In this embodiment, the above-mentioned target exhaust pressure value can refer to the pressure value of the exhaust point in the above-mentioned steps, which can be determined according to the target pressure difference value and the target intake pressure value of the intake point, and then the first opening and closing frequency of the exhaust and drainage valve is determined according to the determined target exhaust pressure value.

[0066] It should be noted that, before determining the first opening and closing frequency of the exhaust and drainage valve, the target exhaust pressure value needs to be determined first. By determining the target exhaust pressure difference value, the hydrogen circulation system can have a certain stability during operation, and it can prevent the pressure inside the hydrogen circulation system from exceeding the safety range or being too low, thereby maintaining the balance and normal operation of the hydrogen circulation system.

[0067] As an optional embodiment, the target intake pressure value of the flow control valve in the hydrogen circulation system, the target pressure difference value of the pressure difference control module, the first rotational speed of the hydrogen pump, and the first opening and closing frequency of the exhaust and drainage valve are determined according to the first power difference, including: in the case that the exhaust and drainage valve includes an exhaust valve and a drainage valve, and the first opening and closing frequency includes an exhaust opening and closing frequency and a drainage opening and closing frequency, the target intake pressure value, the target pressure difference value, the first rotational speed, the exhaust opening and closing frequency of the exhaust valve, and the drainage opening and closing frequency of the drainage valve are determined according to the first power difference.

[0068] In this embodiment, the above-mentioned exhaust and drainage valve can include an exhaust valve and a drainage valve, and correspondingly, the first opening and closing frequency of the exhaust and drainage valve includes an exhaust opening and closing frequency and a drainage opening and closing frequency, that is, based on the first power difference in the above-mentioned steps, the target intake pressure value, the target pressure value, the target pressure difference value, the first rotational speed of the hydrogen pump, the exhaust opening and closing frequency of the exhaust valve, and the drainage opening and closing frequency of the drainage valve are further determined.

[0069] It should be noted that, by the exhaust valve and the drainage valve in the above-mentioned steps, the exhaust opening and closing frequency and the drainage opening and closing frequency can be appropriately adjusted, which can effectively remove the gas and excess moisture in the hydrogen circulation system to a certain extent, and maintain the normal operation and stability of the hydrogen circulation system.

[0070] As an optional embodiment, the method further comprises: receiving pressure values corresponding to the intake point and the exhaust point respectively; in the case that there is a pressure value greater than a predetermined threshold value in the corresponding pressure values, determining a pressure relief control pressure value of a pressure relief valve in the hydrogen circulation system; and using the pressure relief valve to control the pressure relief pressure based on the pressure relief control pressure value until the pressure values corresponding to the intake point and the exhaust point are both less than or equal to the predetermined threshold value.

[0071] In this embodiment, the pressure value corresponding to the intake point can represent the current intake pressure value of the hydrogen circulation system, and the pressure value corresponding to the exhaust point can represent the current exhaust pressure value of the hydrogen circulation system. In this step, the pressure values corresponding to the intake point and the exhaust point are not limited and can be determined according to the specific scene and the operation of the hydrogen circulation system.

[0072] The predetermined threshold pressure value includes a predetermined threshold pressure value corresponding to the intake point and a predetermined threshold pressure value corresponding to the exhaust point, which are not limited and can be customized according to the specific scene and the pressure values corresponding to the intake point and the exhaust point.

[0073] The pressure relief valve can be a control device included in the hydrogen circulation system. For the above step, the pressure value corresponding to the intake point can be obtained through the pressure sensor arranged at the intake point, and the pressure value corresponding to the exhaust point can be obtained through the pressure sensor arranged at the exhaust point. Then, the pressure values corresponding to the intake point and the exhaust point can be analyzed, and it can be determined whether there is a pressure value greater than the predetermined threshold value. If there is a pressure value greater than the predetermined threshold value, a suitable pressure relief control pressure value is determined, and the pressure relief valve is used to control the pressure relief pressure based on the determined pressure relief control pressure value, so that the pressure values corresponding to the intake point and the exhaust point are kept below the predetermined threshold value, avoiding overpressure failure of the hydrogen circulation system.

[0074] It should be noted that the pressure relief valve in the above step is used to control the pressure relief pressure of the hydrogen circulation system, and the pressure values of the intake point and the exhaust point are adjusted to be below the predetermined threshold value. In the working process of the hydrogen circulation system, if overpressure failure occurs, the pressure relief valve will open to reduce the pressure in the hydrogen circulation system. That is, by controlling the operation of the pressure relief valve to adjust the internal pressure of the hydrogen circulation system, the safe operation and stability of the hydrogen circulation system can be ensured.

[0075] As an optional embodiment, after determining the second rotation speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drainage valve, the method further comprises: using the hydrogen pump to control the rotation speed based on the second rotation speed, and using the exhaust and drainage valve to control the opening and closing based on the second opening and closing frequency.

[0076] In this embodiment, based on the second rotating speed of the hydrogen pump determined in the above-mentioned step, the demand of the hydrogen circulation system can be met by controlling the rotating speed of the hydrogen pump to be the second rotating speed. In this step, the hydrogen pump equipment parameters of the hydrogen pump can be adjusted to ensure stable operation of the hydrogen pump at the second rotating speed.

[0077] Based on the second opening and closing frequency of the exhaust and drainage valve determined in the above-mentioned step, the exhaust and drainage in the hydrogen circulation system can be controlled by controlling the opening and closing action of the exhaust and drainage valve. In this step, the opening and closing can be performed at the second frequency to ensure that the exhaust and drainage valve operates according to the demand of the hydrogen circulation system.

[0078] It should be noted that based on the second rotating speed and the exhaust and drainage valve, the hydrogen circulation system can quickly respond to the power load change request of the hybrid electric vehicle under the above-mentioned first power difference, and to some extent, the power load change process of the hybrid electric vehicle is accelerated.

[0079] Based on the above-mentioned embodiments and optional embodiments, an optional implementation is provided, which is described in detail as follows.

[0080] In the related art, when the power of the hybrid electric vehicle is changed, the speed of the load change is slow. For example, in the related art, one is to use the control mode of the hydrogen circulation architecture to change the power of the hybrid electric vehicle, which is prone to the problem of insufficient hydrogen circulation due to the phenomenon of insufficient hydrogen. Another is to use the control mode of the hydrogen circulation architecture to change the power of the hybrid electric vehicle, which has the problem of slow load change speed of the power of the hybrid electric vehicle.

[0081] In view of this, the optional embodiment of the present application provides a hydrogen circulation system, Figure 2 is a component structure diagram of the hydrogen circulation system provided by the optional embodiment of the present application, as shown in Figure 2 The component structure of the hydrogen circulation system includes a stack shell, a flow control valve, a pressure relief valve, an ejector, a hydrogen circulation pump (hydrogen pump), a gas-liquid separator, a drainage valve, an exhaust valve, and a pressure difference sensor, Figure 3 is a first strategy diagram for controlling the power load change of the hydrogen circulation system provided by the optional embodiment of the present application, Figure 4 is a second strategy diagram for controlling the power load change of the hydrogen circulation system provided by the optional embodiment of the present application, Figure 5 is a third strategy diagram for controlling the power load change of the hydrogen circulation system provided by the optional embodiment of the present application, which together constitutes the overall strategy diagram for controlling the power load change of the hydrogen circulation system provided by the optional embodiment of the present application, as shown in Figure 3 , Figure 4 , Figure 5 As shown in the above-mentioned drawings, the optional embodiment of the present application is described in detail as follows.

[0082] (I) Introduction to the components included in the hydrogen circulation system:

[0083] Stack housing.

[0084] Flow control valve: by opening a certain opening, control the inlet pressure and flow of hydrogen; the front end of the flow control valve is the hydrogen pressure source.

[0085] Pressure relief valve: if the hydrogen circulation loop has an overpressure fault, the pressure relief valve will open to reduce the hydrogen circulation pressure; the valve is mechanically passive control.

[0086] Ejector: for hydrogen circulation.

[0087] Hydrogen pump: for active circulation of hydrogen, by controlling the speed of the hydrogen circulation pump, to control the metering ratio.

[0088] Gas-liquid separator: for separating gas and liquid.

[0089] Exhaust and drain valve: including a drain valve and an exhaust valve, wherein the drain valve is used to discharge liquid water from the gas-liquid separator, and the valve can be actively controlled; the exhaust valve is used to discharge gaseous water from the gas-liquid separator, and the valve can be actively controlled.

[0090] Differential pressure control module: for measuring the pressure difference between the stack inlet pressure P1 (same as the above inlet point) and the stack outlet pressure P2 (same as the above exhaust point), the inlet pressure P1 can be measured by an inlet pressure sensor, and the outlet pressure P2 can be measured by an outlet pressure sensor.

[0091] (II) Introduction to the strategy diagram for controlling the power variable load of the hydrogen circulation system:

[0092] The strategy diagram has two architectures, namely the ejector architecture and the hydrogen pump architecture, as shown in Figure 3 , the first strategy diagram first performs a series of preparations before receiving the power variable load instruction, such as setting and starting the operation of the device parameters inside the hydrogen circulation system according to the preset mode. In addition, as shown in Figure 4 , the second strategy diagram can accept the power variable load request through the hydrogen circulation system, make a preliminary judgment on the load increase and load decrease process after receiving the request, and make different short-time control strategies for load increase and load decrease during the load increase and load decrease process. The following is a specific explanation:

[0093] The system receives the "load change" instruction, first determines whether it is "load increase" or "load decrease", and looks up the pressure difference value of the power point. The purpose is to ensure that the control of the pressure difference value during the load change process is not lower than the steady-state pressure difference of the point. The load increase span (same as the first power difference) X and the load decrease span Y (same as the first power difference) in the strategy diagram are used for table lookup control by the system. During the load increase control process, the value of the pressure difference P1-P2 is determined, and then the target pressure difference value is controlled through the pressure control valve FIV. The intake pressure P1=α1 is determined as the target intake pressure value, and the hydrogen pump speed H2_Pump_rpm=α1 is determined as the speed of a target point higher than the target point α2. The purpose is to ensure that the metering ratio is not lower than the steady-state metering ratio during the load change process. When stable, the pressure is P1=α1, and the hydrogen pump speed is H2_Pump_rpm=α2 rpm. Other controls are shown in the figure.

[0094] As shown in Figure 5 , the third strategy diagram ensures that the nitrogen discharge valve FPV is opened during the load change process; and at the same time, the inlet and outlet pressure difference is ensured. If there is a hydrogen circulating pump in the architecture, the first speed of the hydrogen circulating pump during the load change process should also be higher than the second speed in the steady-state operating state. The purpose is also to ensure the hydrogen circulation amount during the load change process. Under the condition of a determined stack pressure resistance, the inlet and outlet pressure difference is met, i.e., the actual gas flow through the stack is met, i.e., the metering ratio. The above is for the case where the power load change request is power load increase. If the power load change request is power load decrease, the specific control strategy is similar to the above process, and will not be described here. The specific process can be known from the figure.

[0095] The strategy diagram for the hydrogen circulation system control power load change embodies the entire load change process, which is actually a pressure control feedforward process for the stack. The entire process is completed in milliseconds (less than 1 second). In the state of completed pressure control feedforward, the system is subjected to current load change to achieve the target power.

[0096] (II) Introduce the power load change steps of the hydrogen circulation system in a hybrid electric vehicle:

[0097] S1, in response to a power load change request, determining a first power difference value between a target power of the hybrid electric vehicle and a first operating power;

[0098] It should be noted that the above power load change request can be a power load increase request or a power load decrease request. The first power difference value is determined based on the target power of the hybrid electric vehicle and the first operating power, i.e., the first power difference value can be a load increase span.

[0099] S2, determining a difference interval of the first power difference value according to the first power difference value, and determining a target intake pressure value, a target pressure difference value, a first rotating speed and a first opening and closing frequency corresponding to the difference interval;

[0100] It should be noted that the target intake pressure value is determined by the flow control valve in the hydrogen circulation system, the target pressure difference value can be determined based on the pressure difference control module, the pressure difference control module can be obtained by the pressure difference between the intake pressure sensor P1 and the outlet pressure sensor P2 in the above steps, the first rotating speed can be determined based on the hydrogen pump equipment parameters of the hydrogen pump in the hydrogen circulation system, and the first opening and closing frequency refers to the opening and closing frequency of the exhaust and drainage valve, which can include the exhaust opening and closing frequency and the exhaust opening and closing frequency, which can be determined according to the target pressure difference value and the target intake pressure value.

[0101] For the above steps, the hydrogen circulation system receives the "variable load" instruction, first judges whether it is "load increase" or "load decrease", and looks up the first power difference value of the power point, that is, determines the difference interval of the first power difference value in the above steps, the purpose is to ensure that the pressure difference control is not lower than the steady state pressure difference of the point during the variable load process.

[0102] S3, using the flow control valve to control the intake flow based on the target intake pressure value, using the pressure difference control module to control the pressure difference based on the target pressure difference value, using the hydrogen pump to control the rotating speed based on the first rotating speed, and using the exhaust and drainage valve to control the opening and closing based on the first opening and closing frequency;

[0103] It should be noted that according to the target intake pressure value, the target pressure difference value, the first rotating speed and the first opening and closing frequency determined in the above steps, the flow control valve is further used to control the intake flow, the pressure difference control module is used to control the pressure difference, the hydrogen pump is used to control the rotating speed, and the exhaust and drainage valve is used to control the opening and closing.

[0104] S4, receiving the second running power of the hybrid electric vehicle, in the case that the second power difference value between the second running power and the target power is within the predetermined difference value threshold, obtaining the result of the power variable load of the hybrid electric vehicle, and determining the second rotating speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drainage valve, so that the hybrid electric vehicle runs continuously at the second running power.

[0105] It should be noted that after determining the second rotating speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drainage valve, the hydrogen pump can be controlled based on the second rotating speed to control the rotating speed, and the exhaust and drainage valve can be controlled based on the second opening and closing frequency to control the opening and closing.

[0106] For the steps described in the above method, if the hydrogen circulation loop has an overpressure fault, according to Figure 2In the hydrogen circulation system, the relief valve will open, the hydrogen circulation pressure will be reduced, the valve is mechanically controlled passively, and in this process, the pressure values corresponding to the intake point and the exhaust point are received respectively, and in the case that there is a pressure value greater than the predetermined threshold value in the corresponding pressure values, the relief control pressure value of the relief valve in the hydrogen circulation system is determined, and the relief pressure of the relief valve is controlled based on the relief control pressure value until the pressure values corresponding to the intake point and the exhaust point are less than or equal to the predetermined threshold value.

[0107] Through the above-mentioned optional implementation, at least the following beneficial effects can be achieved:

[0108] (1) Since the first power difference value is determined according to the target power and the first running power of the hybrid vehicle, that is, through the determined first power difference value, whether the hybrid vehicle needs to increase power or reduce power can be further analyzed, so as to accurately determine the power load change of the hybrid vehicle;

[0109] (2) Since the difference value interval is determined according to the first power difference value, that is, by determining the target intake pressure value, the target pressure difference value, the first rotating speed and the first opening and closing frequency according to the difference value interval to which the first power difference value belongs, to a certain extent, the control strategy of the hydrogen circulation system can be optimized to realize more accurate load power adjustment of the hybrid vehicle;

[0110] (3) Since the second rotating speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drain valve are determined when the second power difference value between the second running power and the target power is within the predetermined difference value threshold range and the power load change of the hybrid vehicle is completed, that is, the hydrogen circulation system can quickly respond to the power load change request of the hybrid vehicle under the above-mentioned first power difference value, to a certain extent, the power load change process of the hybrid vehicle is accelerated.

[0111] It should be noted that for the above-mentioned method embodiments, in order to simply describe, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other order or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily necessary for the present application.

[0112] Those skilled in the art can clearly understand that the method according to the above-mentioned embodiments can be realized by means of software and necessary general hardware platforms, of course, can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a ROM / RAM, a magnetic disk, an optical disk) and includes a plurality of instructions for causing a terminal device (which can be a mobile phone, a computer, a server, or a network device) to execute the method of each embodiment of the present application.

[0113] Embodiment 2

[0114] According to the embodiments of the present application, a device for implementing the power variable load method of the hybrid electric vehicle is also provided, Figure 6 is a structural block diagram of the power variable load device of the hybrid electric vehicle according to the embodiments of the present application, as Figure 6 shown, the device comprises a first determining module 602, a second determining module 604, a control module 606, a receiving module 608 and a third determining module 610, which are described in detail below.

[0115] The first determining module 602 is configured to determine a first power difference between a target power and a first running power of the hybrid electric vehicle in response to a power variable load request;

[0116] The second determining module 604 is connected to the first determining module 602 and is configured to determine a target intake pressure value of a flow control valve in a hydrogen circulation system, a target pressure difference value of a pressure difference control module, a first rotating speed of a hydrogen pump and a first opening and closing frequency of an exhaust and drainage valve according to the first power difference, wherein the pressure difference control module is configured to control a pressure difference between an intake point and an exhaust point, the intake point is located at an inlet position of the stack in the hydrogen circulation system, and the exhaust point is located at an outlet position of the stack.

[0117] The control module 606 is connected to the second determining module 604 and is configured to control the intake flow based on the target intake pressure value by using the flow control valve, control the pressure difference based on the target pressure difference value by using the pressure difference control module, control the rotating speed based on the first rotating speed by using the hydrogen pump, and control the opening and closing based on the first opening and closing frequency by using the exhaust and drainage valve.

[0118] The receiving module 608 is connected to the control module 606 and is configured to receive a second running power of the hybrid electric vehicle.

[0119] The third determining module 610 is connected to the receiving module 608, and is configured to, when the second power difference between the second running power and the target power is within the predetermined difference threshold, obtain a result of completing the power variable load of the hybrid vehicle, and determine a second rotating speed of the hydrogen pump and a second opening and closing frequency of the exhaust and drainage valve, so that the hybrid vehicle continuously runs at the second running power, wherein the second rotating speed is lower than the first rotating speed, and the second opening and closing frequency is lower than the first opening and closing frequency.

[0120] It should be noted that the first determining module 602, the second determining module 604, the control module 606, the receiving module 608 and the third determining module 610 correspond to steps S102 to S110 in the method for performing the power variable load of the hybrid vehicle, and the multiple modules have the same instances and application scenarios as the corresponding steps, but are not limited to the content disclosed in the above embodiment 1.

[0121] Embodiment 3

[0122] According to another aspect of the embodiments of the present application, an electronic device is also provided, which includes a processor and a memory for storing processor-executable instructions, wherein the processor is configured to execute the instructions to implement the method for performing the power variable load of the hybrid vehicle according to any one of the above.

[0123] Embodiment 4

[0124] According to another aspect of the embodiments of the present application, a computer-readable storage medium is also provided, which, when the instructions in the computer-readable storage medium are executed by the processor of an electronic device, enables the electronic device to perform the method for performing the power variable load of the hybrid vehicle according to any one of the above.

[0125] The above-mentioned embodiment numbers of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0126] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0127] In the several embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. Of course, the above device embodiment is only illustrative, for example, the division of the units can be a logical function division, and in actual implementation, there can be another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed each other can be indirect coupling or communication connection through some interfaces, units or modules, and can be electrical or other forms.

[0128] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0129] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0130] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application, essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to make a computer device (which can be a personal computer, a server or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The foregoing storage medium includes: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, and various program code storage media.

[0131] The above is only the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A power load varying method for a hybrid vehicle, characterized by, The method comprises: determining a first power difference between a target power of the hybrid vehicle and a first operating power in response to a power load change request, wherein the load change request is a load increase or a load decrease; determining a target intake pressure value of a flow control valve in a hydrogen circulation system, a target pressure difference value of a pressure difference control module, a first rotating speed of a hydrogen pump, and a first opening and closing frequency of an exhaust and drainage valve according to the first power difference, wherein the pressure difference control module is configured to control a pressure difference between an intake point and an exhaust point, the intake point is located at an inlet position of a stack in the hydrogen circulation system, and the exhaust point is located at an outlet position of the stack; controlling an intake flow based on the target intake pressure value by using the flow control valve, controlling a pressure difference based on the target pressure difference value by using the pressure difference control module, controlling a rotating speed based on the first rotating speed by using the hydrogen pump, and controlling opening and closing based on the first opening and closing frequency by using the exhaust and drainage valve; receiving a second operating power of the hybrid vehicle; in a case where a second power difference between the second operating power and the target power is within a predetermined difference threshold, obtaining a result of completing the power load change of the hybrid vehicle, and determining a second rotating speed of the hydrogen pump and a second opening and closing frequency of the exhaust and drainage valve, so that the hybrid vehicle continuously operates at the second operating power, wherein the second rotating speed is lower than the first rotating speed, and the second opening and closing frequency is lower than the first opening and closing frequency; wherein the determining the target intake pressure value of the flow control valve, the target pressure difference value of the pressure difference control module, the first rotating speed of the hydrogen pump, and the first opening and closing frequency of the exhaust and drainage valve according to the first power difference comprises: determining a difference interval to which the first power difference belongs; and retrieving the target intake pressure value, the target pressure difference value, the first rotating speed, and the first opening and closing frequency corresponding to the difference interval.

2. The method of claim 1, wherein, The determining the first rotating speed of the hydrogen pump according to the first power difference comprises: determining a hydrogen pump equipment parameter of the hydrogen pump; determining the first rotating speed according to the first power difference and the hydrogen pump equipment parameter.

3. The method of claim 1, wherein, The determining the first opening and closing frequency of the exhaust and drainage valve according to the first power difference comprises: determining a target exhaust pressure value according to the target pressure difference value and the target intake pressure value; determining the first opening and closing frequency according to the target exhaust pressure value.

4. The method of claim 1, wherein, The determining the target intake pressure value of the flow control valve, the target pressure difference value of the pressure difference control module, the first rotating speed of the hydrogen pump, and the first opening and closing frequency of the exhaust and drainage valve according to the first power difference comprises: in a case where the exhaust and drainage valve comprises an exhaust valve and a drainage valve, and the first opening and closing frequency comprises an exhaust opening and closing frequency and a drainage opening and closing frequency, determining the target intake pressure value, the target pressure difference value, the first rotating speed, the exhaust opening and closing frequency of the exhaust valve, and the drainage opening and closing frequency of the drainage valve according to the first power difference.

5. The method of claim 1, wherein, The method further comprises: receiving pressure values corresponding to the intake point and the exhaust point, respectively; In a case where there is a pressure value greater than a predetermined threshold value among the corresponding pressure values, a relief control pressure value of a pressure relief valve in the hydrogen circulation system is determined; The relief pressure of the pressure relief valve is controlled based on the relief control pressure value until the pressure values corresponding to the intake point and the exhaust point are both less than or equal to the predetermined threshold value.

6. The method according to any one of claims 1 to 5, characterized in that, After the second rotational speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drainage valve are determined, the method further comprises: The rotational speed of the hydrogen pump is controlled based on the second rotational speed, and the opening and closing of the exhaust and drainage valve is controlled based on the second opening and closing frequency.

7. A power variator for a hybrid vehicle, characterized by comprising: The method comprises: A first determination module is configured to determine a first power difference between a target power and a first running power of a hybrid vehicle in response to a power load change request, wherein the load change request is a load increase or a load decrease; A second determination module is configured to determine a target intake pressure value of a flow control valve in a hydrogen circulation system, a target pressure difference value of a pressure difference control module, a first rotational speed of a hydrogen pump, and a first opening and closing frequency of an exhaust and drainage valve according to the first power difference, wherein the pressure difference control module is configured to control a pressure difference between an intake point and an exhaust point, the intake point is located at an inlet position of a stack in the hydrogen circulation system, and the exhaust point is located at an outlet position of the stack; A control module is configured to control an intake flow based on the target intake pressure value by using the flow control valve, control a pressure difference based on the target pressure difference value by using the pressure difference control module, control a rotational speed based on the first rotational speed by using the hydrogen pump, and control opening and closing based on the first opening and closing frequency by using the exhaust and drainage valve; A receiving module is configured to receive a second running power of the hybrid vehicle; A third determination module is configured to obtain a result of completing the power load change of the hybrid vehicle in a case where a second power difference between the second running power and the target power is within a predetermined difference threshold value, and determine a second rotational speed of the hydrogen pump and a second opening and closing frequency of the exhaust and drainage valve, so that the hybrid vehicle continuously runs at the second running power, wherein the second rotational speed is lower than the first rotational speed, and the second opening and closing frequency is lower than the first opening and closing frequency; The second determination module is further configured to determine a difference value interval to which the first power difference belongs, and retrieve the target intake pressure value, the target pressure difference value, the first rotational speed, and the first opening and closing frequency corresponding to the difference value interval.

8. An electronic device, comprising: The method comprises: A processor; A memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the power load change method of the hybrid vehicle according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, When the instructions in the computer readable storage medium are executed by the processor of the electronic device, the electronic device can execute the power load change method of the hybrid vehicle according to any one of claims 1 to 6.

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