Power load changing method and device of hybrid electric vehicle and electronic equipment

Abstract

The invention discloses a power load changing 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 target power and first operating power of the hybrid electric vehicle; according to the first power difference value, the target air inlet pressure value of a flow control valve, the target pressure difference value of a pressure difference control module, the first rotating speed of a hydrogen pump and the first opening and closing frequency of an exhaust and drainage valve are determined; controlling the air inlet flow, the pressure difference value, the rotating speed of a hydrogen pump and opening and closing of a drainage and exhaust valve; receiving second operating power of the hybrid electric vehicle; and when the difference value between the second operation power and the target power is equal to a preset difference value threshold value, obtaining a load changing completion result of the hybrid electric vehicle, and determining a second rotating speed and a second opening and closing frequency so as to enable the hybrid electric vehicle to operate at the second operation power. According to the method and the device, the technical problem of air shortage easily occurring in the load changing process when the power load of the hybrid electric vehicle is changed in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of power vehicles, and in particular to a power load changing method, device and electronic equipment for a hybrid power vehicle. Background Art

[0002] At present, the hydrogen cycle architecture of the fuel cell system and the cycle control based on the architecture are key factors affecting the durability of the system. In order to further improve the power load change rate of hybrid vehicles, it is necessary to make a control strategy for the hydrogen cycle architecture. However, in the related technology, when the related methods are used to change the power load of hybrid vehicles, the problem of insufficient gas is easy to occur during the load change process.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present invention provide a power load changing method, device and electronic equipment for a hybrid electric vehicle, so as to at least solve the technical problem of insufficient gas that is easily occurred during the power load changing process of a hybrid electric vehicle in the related art.

[0005] According to one aspect of an embodiment of the present invention, a power load variation method for a hybrid electric vehicle is provided, comprising: determining a first power difference between a target power of the hybrid electric vehicle and a first operating power in response to a power load variation request; determining a target intake pressure value of a flow control valve in a hydrogen circulation system, a target pressure difference of a pressure difference control module, a first rotation speed of a hydrogen pump, and a first opening and closing frequency of an exhaust and drain valve based on the first power difference, wherein the pressure difference control module is used to control the pressure difference between an intake point and an exhaust point, the intake point being located at an inlet position of a fuel cell stack in the hydrogen circulation system, and the exhaust point being located at an outlet position of the fuel cell stack; and 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, using the hydrogen pump to control the speed based on the first speed, and using the exhaust and drain valve to control the opening and closing based on the first opening and closing frequency; receiving the second operating power of the hybrid vehicle; when the second power difference between the second operating power and the target power is within a predetermined difference threshold, obtaining the result of the power load change completion of the hybrid vehicle, and determining the second speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drain valve, so that the hybrid vehicle can continue to operate at the second operating power, wherein the second speed is lower than the first speed, and the second opening and closing frequency is lower than the first opening and closing frequency.

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

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

[0008] Optionally, determining a first opening and closing frequency of the exhaust and drain valve based on the first power difference includes: determining a target exhaust pressure value based on the target pressure difference and the target intake pressure value; and determining the first opening and closing frequency based on the target exhaust pressure value.

[0009] Optionally, determining a target intake pressure value of a flow control valve in a hydrogen circulation system, a target pressure difference of a pressure difference control module, a first speed of a hydrogen pump and a first opening and closing frequency of an exhaust and drain valve based on the first power difference includes: when the exhaust and drain valve includes an exhaust valve and a drain valve, and the first opening and closing frequency includes an exhaust opening and closing frequency and a drain opening and closing frequency, determining the target intake pressure value, the target pressure difference, the first speed, the exhaust opening and closing frequency of the exhaust valve, and the drain opening and closing frequency of the drain valve based on the first power difference.

[0010] Optionally, the method also includes: receiving pressure values ​​corresponding to the intake point and the exhaust point respectively; determining a pressure relief control pressure value of the pressure relief valve in the hydrogen circulation system when there is a pressure value greater than a predetermined threshold among the corresponding pressure values; 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 respectively are less than or equal to the predetermined threshold.

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

[0012] According to one aspect of an embodiment of the present invention, a power variable load device for a hybrid vehicle is provided, comprising: a first determination module, for determining a first power difference between a target power of the hybrid vehicle and a first operating power in response to a power variable load request; a second determination module, for determining a target intake pressure value of a flow control valve in a hydrogen circulation system, a target pressure difference of a pressure difference control module, a first rotation speed of a hydrogen pump, and a first opening and closing frequency of an exhaust and drain valve according to the first power difference, wherein the pressure difference control module is used to control the pressure difference between an intake point and an exhaust point, the intake point being located at an inlet position of a fuel cell stack in the hydrogen circulation system, and the exhaust point being located at an outlet position of the fuel cell stack; a control module, for controlling the flow control valve based on the target intake pressure value Intake flow, using the pressure difference control module to control the pressure difference based on the target pressure difference, using the hydrogen pump to control the speed based on the first speed, and using the exhaust and drain valve to control opening and closing based on the first opening and closing frequency; a receiving module, used to receive the second operating power of the hybrid vehicle; a third determination module, used to obtain the result of the power load change completion of the hybrid vehicle when the second power difference between the second operating power and the target power is within a predetermined difference threshold, and determine the second speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drain valve, so that the hybrid vehicle can continue to operate at the second operating power, wherein the second speed is lower than the first speed, and the second opening and closing frequency is lower than the first opening and closing frequency.

[0013] According to one aspect of an embodiment of the present invention, an electronic device is provided, comprising: a processor; and a memory for storing instructions executable by the processor; wherein the processor is configured to execute the instructions to implement any of the above-mentioned power load variation methods for a hybrid electric vehicle.

[0014] According to one aspect of an embodiment of the present invention, a computer-readable storage medium is provided, comprising: when instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute any of the above-mentioned power load variation methods for a hybrid electric vehicle.

[0015] In an embodiment of the present invention, in response to a power load change request, a first power difference between a target power of a hybrid vehicle and a first operating power is determined, and based on the first power difference, a target intake pressure value of a flow control valve in a hydrogen circulation system, a target pressure difference of a pressure difference control module, a first speed of a hydrogen pump, and a first opening and closing frequency of an exhaust and drain valve are determined, wherein the pressure difference control module is used to control the pressure difference between an intake point and an exhaust point, wherein the intake point is located at an inlet position of a fuel cell stack in a hydrogen circulation system, and the exhaust point is located at an outlet position of the fuel cell stack. 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, the hydrogen pump is used to control the speed based on the first speed, and the exhaust and drain valve is used to control the opening and closing based on the first opening and closing frequency; the second operating power of the hybrid vehicle is received, and when the second power difference between the second operating power and the target power is within a predetermined difference threshold, the result of the completion of the power load change of the hybrid vehicle is obtained, and the second speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drain valve are determined, so that the hybrid vehicle can continue to operate at the second operating power, wherein the second speed is lower than the first speed, and the second opening and closing frequency is lower than the first opening and closing frequency. Since the first speed of the hydrogen pump and the first opening and closing frequency of the exhaust and drain valve are determined in advance and are higher than the power when the hybrid vehicle is running at the target power, the circulation of the hydrogen circulation system can be accelerated, and the rate at which the power of the hybrid vehicle changes from the first operating power to the target power can be increased. After the power of the hybrid vehicle reaches the second operating power that is the same as or close to the target power, the speed of the hydrogen pump and the opening and closing frequency of the exhaust and drain valve are adjusted back to the second speed and the second opening and closing frequency, so that the hybrid vehicle can continue to run at the second operating power. To a certain extent, the power load change request of the hybrid vehicle can be quickly responded to, thereby improving the load change speed of the power load change of the hybrid vehicle. Moreover, since the pressure difference control module is used to control the pressure difference based on the target pressure difference, the pressure difference between the intake point and the exhaust point meets the pressure difference required under the target power, so it will not cause the short-term "gas shortage" of the anode of the stack in the hydrogen circulation system, thereby solving the technical problem of gas shortage that is easy to occur during the load change process when the power of the hybrid vehicle is changed in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

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

[0018] Figure 2is a structural diagram of components included in a hydrogen circulation system provided in an optional embodiment of the present invention;

[0019] Figure 3 The first strategy diagram including power load variation control of the hydrogen cycle system provided by an optional embodiment of the present invention;

[0020] Figure 4 A second strategy diagram including power load variation control of a hydrogen cycle system provided in an optional embodiment of the present invention;

[0021] Figure 5 A third strategy diagram for controlling power load variation of a hydrogen cycle system provided in an optional embodiment of the present invention;

[0022] Figure 6 4 is a structural block diagram of a power load varying device for a hybrid vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

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

[0025] Example 1

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

[0027] Figure 1 is a flow chart of a power load changing method for a hybrid vehicle according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:

[0028] Step S102, in response to the power load change request, determining a first power difference between a target power of the hybrid vehicle and a first operating power;

[0029] In step S102 provided in the present application, the power load change request is a request for the hybrid vehicle to perform a power load change. The power load change request may be a power load change request of the hybrid vehicle, and may include a power increase request and a power decrease request. The power increase request may be received in response to a user stepping on the accelerator, and the power decrease request may be received in response to a user stepping on the brake. The controller may determine the power to be adjusted to based on the user's operation, that is, it may determine the target power to be achieved.

[0030] The above-mentioned target power can be the target power that the hybrid vehicle needs to achieve through power load variation when the hybrid vehicle needs to vary power, that is, it can be a preset power, and the above-mentioned first operating power can be the current operating power of the hybrid vehicle before receiving the power load variation request of the hybrid vehicle.

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

[0032] Step S104, 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 rotation speed of a hydrogen pump, and a first opening and closing frequency of an exhaust and drain valve according to the first power difference value, wherein the pressure difference control module is used to control the pressure difference value between an intake point and an exhaust point, the intake point is located at an inlet position of a fuel cell stack in a hydrogen circulation system, and the exhaust point is located at an outlet position of the fuel cell stack;

[0033] In step S104 provided in the present application, the above-mentioned hydrogen circulation system may refer to a hydrogen fuel cell system in a hybrid vehicle, and the above-mentioned flow control valve may be in the hydrogen circulation system, used to adjust the hydrogen flow, and may control the flow distribution of hydrogen.

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

[0035] The first speed of the hydrogen pump can be adjusted according to the first power difference and the target power to meet the supply demand of hydrogen. In this step, the speed of the hydrogen pump can be adjusted to further control the flow rate of hydrogen.

[0036] The first opening and closing frequency of the exhaust and drain valve may be used to control the frequency of exhaust and drain of the exhaust and drain valve in the hydrogen circulation system, and may be determined based on the first power difference.

[0037] It should be noted that, by adjusting the target intake pressure value and the first rotation speed of the hydrogen pump according to the above-mentioned first power difference, the stable operation of the hydrogen circulation system can be ensured, and the target power requirement of the hybrid vehicle can be better met.

[0038] It should also be noted that by adjusting the speed of the hydrogen pump to a higher speed and the opening and closing frequency of the exhaust and drain valves to a higher opening and closing frequency, more hydrogen can be provided to the hydrogen circulation system, which is more capable of supporting the rapid load change process.

[0039] Step S106, using a flow control valve to control the intake flow rate based on a target intake pressure value, using a pressure difference control module to control the pressure difference based on a target pressure difference value, using a hydrogen pump to control the speed based on a first speed, and using an exhaust and drain valve to control opening and closing based on a first opening and closing frequency;

[0040] In step S106 provided in the present application, based on the target intake pressure value determined in the above steps, the intake flow rate of hydrogen is adjusted by using a flow control valve to meet the target intake pressure value. In this step, the opening of the flow control valve can be adjusted according to the above-mentioned first power difference to achieve the required intake flow rate.

[0041] Based on the target pressure difference determined in the above steps, the pressure difference between the intake point and the exhaust point is adjusted 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, and the hydrogen flow rate can be adjusted by the pressure difference control module to maintain the pressure difference required by the hydrogen circulation system.

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

[0043] It should be noted that by controlling the target intake pressure value, the target pressure difference, the first speed of the hydrogen pump and the first opening and closing frequency in the above steps, it is possible to accurately control the supply of hydrogen and the regulation of pressure 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 also be noted that after 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 speed based on the first speed, and the exhaust and drain valve is used to control the opening and closing based on the first opening and closing frequency, the controller will automatically read that the above-mentioned equipment in the hydrogen circulation system has adopted the corresponding control strategy. When the controller detects that the hydrogen circulation system has been operated using the above-mentioned strategy, it will load the current and the operating power of the hybrid vehicle will change. So that the second operating power after the change is received later.

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

[0046] In step S108 provided in the present application, the second operating power may refer to the power that the hybrid vehicle can actually achieve after controlling the target intake pressure value, the target pressure difference, the first speed of the hydrogen pump and the first opening and closing frequency in the above steps. The specific power value of the second operating power in the above steps is not limited here and can be determined and adjusted according to the specific scenario and various set parameters in the hydrogen circulation system.

[0047] It should be noted that, when using control devices such as flow control valves, pressure difference control modules, hydrogen pumps and exhaust and drain valves, the hydrogen circulation system can be controlled and adjusted, thereby affecting the power output of the hybrid vehicle. That is, through the above-mentioned control method, the hydrogen circulation system can reach a predetermined working state in terms of meeting the target intake pressure value, the target pressure difference value and the first speed of the hydrogen pump, and further determine the actual power of the hybrid vehicle, that is, the second operating power.

[0048] By determining the second operating power of the hybrid vehicle, it is possible to accurately determine the second operating power that the hybrid vehicle can actually achieve under the conditions of a series of control parameter settings of the hydrogen circulation system determined in the above steps. Based on the second operating power and the first operating power in the above steps, the power load variation process of the hybrid vehicle can be more effectively reflected to a certain extent.

[0049] Step S110, when the second power difference between the second operating power and the target power is within a predetermined difference threshold, the result of the completion of the power load change of the hybrid vehicle is obtained, and the second speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drain valves are determined, so that the hybrid vehicle can continue to operate at the second operating power, wherein the second speed is lower than the first 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 may 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, may be equal to the target power, or may be within a certain error range. This is not limited here and can be customized according to specific scenarios and application requirements.

[0051] For the above steps, the second operating power of the hybrid vehicle can be compared with the preset target power to determine the second power difference between the two. 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, then the result of the completion of the power load change of the hybrid vehicle can be obtained. Further, the second speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drain valve can be adjusted so that the hybrid vehicle can continue to operate at the above second operating power. In this process, the second speed is set to an appropriate value lower than the first speed, and the second opening and closing frequency is set to an appropriate value lower than the first opening and closing frequency. The settings of the second speed and the second opening and closing frequency are not limited here, and can be customized according to the specific scene and the first speed and the first opening and closing frequency.

[0052] It should be noted that while obtaining the result of the power load change of the above-mentioned hybrid vehicle, the second speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drain valve can be appropriately adjusted to enable the hybrid vehicle to continue to operate at the second operating power. To a certain extent, it can quickly respond to the power load change request of the hybrid vehicle, thereby improving the power load change speed of the hybrid vehicle. In a fuel cell system, a fast load change speed can reduce the occurrence of gas shortage. Gas shortage refers to the situation where the hydrogen supply in the fuel cell system is insufficient, which may cause the system performance to decline or even shut down. A fast load change speed means that the system can respond to load changes more quickly and adjust the hydrogen supply in time, thereby avoiding the occurrence of gas shortage. Hydrogen storage devices are usually used in fuel cell systems to balance load changes. Therefore, a fast load change speed can improve the flexibility and stability of hydrogen supply and reduce the occurrence of gas shortage.

[0053] Moreover, since the pressure difference control module is used to control the pressure difference based on the target pressure difference, the pressure difference between the intake point and the exhaust point meets the pressure difference required under the target power, so it will not cause the stack anode to be "under-gased" in the hydrogen circulation system for a short time.

[0054] Through the above steps S102-S110, in response to the power load change request, a first power difference between the target power of the hybrid vehicle and the first operating power is determined, and based on the first power difference, a target intake pressure value of the flow control valve in the hydrogen circulation system, a target pressure difference of the pressure difference control module, a first rotational speed of the hydrogen pump and a first opening and closing frequency of the exhaust and drain valve are determined, wherein the pressure difference control module is used to control the pressure difference between the intake point and the exhaust point, the intake 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. A flow control valve is used to control the intake flow rate based on a target intake pressure value, a pressure difference control module is used to control the pressure difference based on a target pressure difference, a hydrogen pump is used to control the speed based on a first speed, and an exhaust and drain valve is used to control opening and closing based on a first opening and closing frequency; a second operating power of the hybrid vehicle is received, and when a second power difference between the second operating power and the target power is within a predetermined difference threshold, a result of the completion of the power load change of the hybrid vehicle is obtained, and a second speed of the hydrogen pump and a second opening and closing frequency of the exhaust and drain valve are determined, so that the hybrid vehicle can continue to operate at the second operating power, wherein the second speed is lower than the first speed, and the second opening and closing frequency is lower than the first opening and closing frequency. Since the first speed of the hydrogen pump and the first opening and closing frequency of the exhaust and drain valve are determined in advance and are higher than the power when the hybrid vehicle is running at the target power, the circulation of the hydrogen circulation system can be accelerated, and the rate at which the power of the hybrid vehicle changes from the first operating power to the target power can be increased. After the power of the hybrid vehicle reaches the second operating power that is the same as or close to the target power, the speed of the hydrogen pump and the opening and closing frequency of the exhaust and drain valve are adjusted back to the second speed and the second opening and closing frequency, so that the hybrid vehicle can continue to run at the second operating power. To a certain extent, the power load change request of the hybrid vehicle can be quickly responded to, thereby improving the load change speed of the power load change of the hybrid vehicle. Moreover, since the pressure difference control module is used to control the pressure difference based on the target pressure difference, the pressure difference between the intake point and the exhaust point meets the pressure difference required under the target power, so it will not cause the short-term "gas shortage" of the anode of the stack in the hydrogen circulation system, thereby solving the technical problem of gas shortage that is easy to occur during the load change process when the power of the hybrid vehicle is changed in the related technology.

[0055] The above method of this embodiment is further introduced below.

[0056] As an optional embodiment, based on the first power difference, the target intake pressure value of the flow control valve in the hydrogen circulation system, the target pressure difference of the pressure difference control module, the first speed of the hydrogen pump and the first opening and closing frequency of the exhaust and drain valve are determined, including: determining the difference interval to which the first power difference belongs; and retrieving the target intake pressure value, target pressure difference, first speed and first opening and closing frequency corresponding to the difference 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 electric power and the first operating power, and can be a pre-set difference interval. The difference interval is not limited here and can be customized according to specific scenarios and applications.

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

[0059] It should be noted that the retrieval process in the above steps is specifically described: the target intake pressure value corresponding to the difference interval is retrieved, which can be obtained through a pre-set target intake pressure value or a rule adjusted according to experience; the target pressure difference corresponding to the difference interval is retrieved, which can be adjusted and obtained through test data, such as the pressure values ​​of the intake point and the exhaust point; the first speed corresponding to the difference interval is retrieved, which can be obtained by selecting a suitable speed through the hydrogen pump equipment parameters; the first opening and closing frequency corresponding to the difference interval is retrieved, which can be adjusted and obtained through the design and performance requirements of the exhaust and drain valve in the hydrogen circulation system.

[0060] It should also be noted that by determining the target intake pressure value, the target pressure difference, the first 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 vehicle.

[0061] As an optional embodiment, determining a first rotational speed of the hydrogen pump according to the first power difference includes: determining a hydrogen pump equipment parameter of the hydrogen pump; and determining the first rotational speed according to the first power difference and the hydrogen pump equipment parameter.

[0062] In this embodiment, the above hydrogen pump equipment parameters may include the rated speed range of the hydrogen pump, and parameters such as power characteristics. These parameters may come from the technical regulations of the hydrogen pump, factory data, etc., and are not limited here 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 speed of the hydrogen pump can be determined based on the relationship between the first power difference and the equipment parameters of the hydrogen pump, for example, the power can increase with the increase of the speed. By determining the equipment parameters of the hydrogen pump, it is possible to ensure that the hydrogen supply is sufficient to meet the power demand of the hybrid vehicle to a certain extent.

[0064] As an optional embodiment, determining the first opening and closing frequency of the exhaust and drain valve according to the first power difference includes: determining the target exhaust pressure value according to the target pressure difference and the target intake pressure value; 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 may refer to the pressure value of the exhaust point in the above-mentioned steps, which may be determined based on the target pressure difference and the target intake pressure value of the intake point, and then the first opening and closing frequency of the exhaust and drain valve may be determined based on the determined target exhaust pressure value.

[0066] It should be noted that before determining the first opening and closing frequency of the exhaust and drain valve, it is necessary to first determine the target exhaust pressure value. By determining the target exhaust pressure difference, it can be ensured that the hydrogen circulation system has a certain stability during operation, and the pressure inside the hydrogen circulation system can be prevented 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, based on the first power difference, a target intake pressure value of the flow control valve in the hydrogen circulation system, a target pressure difference of the pressure difference control module, a first speed of the hydrogen pump and a first opening and closing frequency of the exhaust and drain valve are determined, including: when the exhaust and drain valve includes an exhaust valve and a drain valve, and the first opening and closing frequency includes an exhaust opening and closing frequency and a drain opening and closing frequency, based on the first power difference, the target intake pressure value, the target pressure difference, the first speed, the exhaust opening and closing frequency of the exhaust valve, and the drain opening and closing frequency of the drain valve are determined.

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

[0069] It should be noted that, through the exhaust valve and drain valve in the above steps, the exhaust switching frequency and the drain 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 also includes: receiving pressure values ​​corresponding to the intake point and the exhaust point respectively; determining the pressure relief control pressure value of the pressure relief valve in the hydrogen circulation system when there is a pressure value greater than a predetermined threshold value among the corresponding pressure values; and controlling the pressure relief pressure based on the pressure relief control pressure value using the pressure relief valve until the pressure values ​​corresponding to the intake point and the exhaust point respectively are less than or equal to the predetermined threshold value.

[0071] In this embodiment, the pressure value corresponding to the above-mentioned intake point can represent the current intake pressure value of the hydrogen circulation system, and the pressure value corresponding to the above-mentioned 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 here, and can be determined according to the specific scenario and the operation conditions of the hydrogen circulation system.

[0072] The above-mentioned predetermined threshold pressure value includes the predetermined threshold pressure value corresponding to the intake point and the predetermined threshold pressure value corresponding to the exhaust point. There is no limitation here and the pressure value corresponding to the intake point and the pressure value corresponding to the exhaust point can be customized according to the specific scenario.

[0073] The above-mentioned pressure relief valve can be a control device included in the hydrogen circulation system. For the above steps, first, the pressure value corresponding to the intake point can be obtained by the pressure sensor set at the intake point, and the pressure value corresponding to the exhaust point can be obtained by the pressure sensor set 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 a certain threshold value. If there is a pressure value greater than the predetermined threshold value, an appropriate pressure relief control pressure value is determined, and the above-mentioned 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 pad are kept below the predetermined threshold value, thereby avoiding overpressure failure in the hydrogen circulation system.

[0074] It should be noted that the pressure relief valve in the above steps is used to control the pressure relief pressure of the hydrogen circulation system, and the pressure values ​​at the intake point and the exhaust point are adjusted to remain below a predetermined threshold value. During the operation of the hydrogen circulation system, if an overpressure fault 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 speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drain valve, it also includes: using the hydrogen pump to control the speed based on the second speed, and using the exhaust and drain valve to control the opening and closing based on the second opening and closing frequency.

[0076] In this embodiment, based on the second speed of the hydrogen pump determined in the above steps, the speed of the hydrogen pump can be controlled to the second speed to meet the needs of the hydrogen circulation system. In this step, the hydrogen pump equipment parameters of the hydrogen pump can be adjusted to ensure that the hydrogen pump operates stably at the second speed.

[0077] Based on the second opening and closing frequency of the exhaust and drain valve determined in the above steps, the exhaust and drainage in the hydrogen circulation system can be controlled by controlling the opening and closing actions of the exhaust and drain valve. In this step, the exhaust and drain valve can be opened and closed according to the second frequency to ensure that the exhaust and drain valve is opened and closed according to the requirements of the operation of the hydrogen circulation system.

[0078] It should be noted that based on the second speed and the exhaust and drain valve, by controlling them through the above-mentioned hydrogen pump and the exhaust and drain valve, the hydrogen circulation system can quickly respond to the power load change request of the hybrid vehicle under the above-mentioned first power difference, thereby speeding up the power load change process of the hybrid vehicle to a certain extent.

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

[0080] In the related art, there is a technical problem of slow load changing speed when the power of a hybrid vehicle is changed. For example, in the related art, one is a control mode using a hydrogen cycle architecture. When the power of the hybrid vehicle is changed, a gas shortage phenomenon is prone to occur, thereby causing a problem of insufficient hydrogen circulation. Another is a control mode using a hydrogen cycle architecture. When the power of the hybrid vehicle is changed, the power changing speed of the hybrid vehicle is slow.

[0081] In view of this, an optional embodiment of the present invention provides a method for Figure 2 is a structural diagram of components included in the hydrogen circulation system provided in an optional embodiment of the present invention, such as Figure 2 As shown, the components of the hydrogen circulation system include: a stack housing, a flow control valve, a pressure relief valve, an ejector, a hydrogen circulation pump (hydrogen pump), a gas-liquid separator, a drain valve, an exhaust valve and a differential pressure sensor. Figure 3 is a first strategy diagram including power load variation control of a hydrogen circulation system provided in an optional embodiment of the present invention, Figure 4 is a second strategy diagram including power load variation control of a hydrogen circulation system provided in an optional embodiment of the present invention, Figure 5 is a third strategy diagram including power load variation control of a hydrogen circulation system provided in an optional embodiment of the present invention, which together constitutes an overall strategy diagram including power load variation control of a hydrogen circulation system provided in an optional embodiment of the present invention, such as Figure 3 , Figure 4 , Figure 5 As shown, the optional implementation methods of the present application are described in detail below.

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

[0083] Battery stack casing.

[0084] Flow control valve: Controls the hydrogen intake pressure and flow rate by opening a certain degree; the front end of the flow control valve is the hydrogen pressure source.

[0085] Pressure relief valve: If an overpressure fault occurs in the hydrogen circulation loop, the pressure relief valve will open to reduce the hydrogen circulation pressure; the valve is mechanically passively controlled.

[0086] Ejector: used for hydrogen circulation.

[0087] Hydrogen pump: used for active circulation of hydrogen, and the metering ratio is controlled by controlling the speed of the hydrogen circulation pump.

[0088] Gas-liquid separator: used to separate gas from liquid.

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

[0090] Pressure difference control module: used to measure the pressure difference between the stack intake pressure P1 (same as the above intake point) and the stack outlet pressure P2 (same as the above exhaust point). The intake pressure P1 can be measured by an intake pressure sensor, and the outlet pressure P2 can be measured by an outlet pressure sensor.

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

[0092] This strategy diagram has two common architectures, namely ejector architecture and hydrogen pump architecture. Figure 3 As shown in FIG. 1 , the first strategy diagram is a series of preparatory work before receiving the power load change instruction, such as setting the equipment parameters inside the hydrogen circulation system according to the preset mode and starting the operation. Figure 4 As shown, the second strategy diagram can receive a power load change request through the hydrogen circulation system. After receiving the request, a pre-judgment is made on the load increase and load decrease process, and different short-term control strategies for load increase and load decrease are made during the load increase and load decrease process. The following is a specific description:

[0093] When the system receives the "load change" instruction, it first determines whether the load change is "load increase" or "load reduction" and looks up the pressure difference of the power point. The purpose is to ensure that the pressure difference control during the load change process is not lower than the steady-state pressure difference at this point. The load increase span (same as the first power difference) X and the load reduction span Y (same as the first power difference) in the strategy diagram are used for the system to look up the table control; during the load increase control process, the value of the pressure difference P1-P2 is determined, and then the target pressure difference control is performed through the pressure control valve FIV, and the intake pressure P1=α1 is determined as the target intake pressure value, and the speed of the hydrogen pump H2_Pump_rpm=α1 is the speed of a target point higher than the target point α2. The purpose is that during the load change process, the metering ratio is not lower than the steady-state metering ratio; when stable, the pressure is P1=α1, and the speed of the hydrogen pump is H2_Pump_rpm=α2rpm. Other controls are shown in the figure.

[0094] like Figure 5 As shown, the third strategy diagram ensures that the nitrogen exhaust valve FPV is open during the load change process; and at the same time, the inlet and outlet pressure difference is guaranteed. If there is a hydrogen circulation pump in the architecture, the first speed of the hydrogen circulation pump should be guaranteed to be higher than the second speed in the steady-state operation state during the load change process. The purpose is also to ensure the hydrogen circulation volume during the load change process. In the process of ensuring the hydrogen circulation volume, under the condition of a certain stack pressure resistance, the inlet and outlet pressure difference is met, and the actual gas flow through the stack can be met, that is, the metering ratio; the above is the case where the power load change request is a power increase. If the power load change request is a power reduction, the specific control strategy is similar to the above process, which will not be repeated here. The specific process can be learned from the figure.

[0095] The strategy diagram for controlling power load variation in the hydrogen cycle system reflects the entire load variation process, which actually performs pressure control feedforward on the fuel cell stack. The entire process is also completed in milliseconds (less than 1 second). When the pressure control feedforward is completed, the system is loaded with current to achieve the target power.

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

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

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

[0099] S2. Determine, based on the first power difference, a difference interval to which the first power difference belongs, and determine a target intake pressure value, a target pressure difference, a first rotational speed, and a first opening and closing frequency corresponding to the difference interval;

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

[0101] For the above steps, when the hydrogen circulation system receives the "load change" instruction, it first determines the load change, whether it is "load increase" or "load reduction" and looks up the first power difference of the power point, that is, determines the difference interval of the first power difference in the above steps, with the aim of ensuring that the pressure difference control during the load change process is not lower than the steady-state pressure difference at this point.

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

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

[0104] S4. Receive the second operating power of the hybrid vehicle, and when a second power difference between the second operating power and the target power is within a predetermined difference threshold, obtain a result of the completion of the power load change of the hybrid vehicle, and determine a second rotational speed of the hydrogen pump and a second opening and closing frequency of the exhaust and drain valve, so that the hybrid vehicle can continue to operate at the second operating power.

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

[0106] For the steps described in the above method, if an overpressure failure occurs in the hydrogen circulation loop, Figure 2The pressure relief valve in the hydrogen circulation system will open to reduce the hydrogen circulation pressure. The valve mechanism is passively controlled. During this process, it is necessary to receive the pressure values ​​corresponding to the intake point and the exhaust point respectively, and when there is a pressure value greater than a predetermined threshold value among the corresponding pressure values, determine the pressure relief control pressure value of the pressure relief valve in the hydrogen circulation system, and use 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 less than or equal to the predetermined threshold value.

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

[0108] (1) Since the first power difference is determined based on the target power of the hybrid vehicle and the first operating power, that is, by determining the first power difference, it is possible to further analyze whether the hybrid vehicle needs to increase power or reduce power, so as to accurately determine the power load change of the hybrid vehicle;

[0109] (2) Since the difference interval is determined based on the first power difference, that is, by determining the target intake pressure value, the target pressure difference, the first 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 vehicle;

[0110] (3) Since the second rotational 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 between the second operating power and the target power is within a predetermined difference 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, which speeds up the power load change process of the hybrid vehicle to a certain extent.

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

[0112] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods of various embodiments of the present invention.

[0113] Example 2

[0114] According to an embodiment of the present invention, there is also provided a device for implementing the power load changing method of the hybrid electric vehicle. Figure 6 is a structural block diagram of a power load changing device for a hybrid vehicle according to an embodiment of the present invention. Figure 6 As shown, the device includes: a first determination module 602, a second determination module 604, a control module 606, a receiving module 608 and a third determination module 610. The device is described in detail below.

[0115] A first determining module 602 is used to determine a first power difference between a target power and a first operating power of the hybrid vehicle in response to a power load change request;

[0116] The second determination module 604 is connected to the first determination module 602, and is used to determine the target intake pressure value of the flow control valve in the hydrogen circulation system, the target pressure difference of the pressure difference control module, the first speed of the hydrogen pump, and the first opening and closing frequency of the exhaust and drain valve according to the first power difference, wherein the pressure difference control module is used to control the pressure difference between the intake point and the exhaust point, the intake 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;

[0117] a control module 606, connected to the second determination module 604, configured to control the intake flow rate based on the target intake pressure value by using the flow control valve, control the pressure difference based on the target pressure difference by using the pressure difference control module, control the speed based on the first speed by using the hydrogen pump, and control the opening and closing of the exhaust and drain valve based on the first opening and closing frequency;

[0118] A receiving module 608, connected to the control module 606, for receiving the second operating power of the hybrid vehicle;

[0119] The third determination module 610 is connected to the above-mentioned receiving module 608, and is used to obtain the result of the power load change completion of the hybrid vehicle when the second power difference between the second operating power and the target power is within a predetermined difference threshold, and determine the second speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drain valves, so that the hybrid vehicle can continue to operate at the second operating power, wherein the second speed is lower than the first speed, and the second opening and closing frequency is lower than the first opening and closing frequency.

[0120] It should be noted here that the above-mentioned first determination module 602, second determination module 604, control module 606, receiving module 608 and third determination module 610 correspond to steps S102 to S110 in implementing the power load variation method of a hybrid vehicle, and the examples and application scenarios implemented by the multiple modules and the corresponding steps are the same, but are not limited to the contents disclosed in the above-mentioned embodiment 1.

[0121] Example 3

[0122] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising: a processor; and a memory for storing instructions executable by the processor, wherein the processor is configured to execute instructions to implement any of the above-mentioned power load variation methods for a hybrid electric vehicle.

[0123] Example 4

[0124] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. When instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device can execute any of the above-mentioned power load variation methods for a hybrid electric vehicle.

[0125] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0126] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0127] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0128] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0129] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0130] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0131] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A power load changing method for a hybrid electric vehicle, characterized in that: include: In response to the power load change request, determining a first power difference between a target power of the hybrid vehicle and a first operating power; According to the first power difference, determine the target intake pressure value of the flow control valve in the hydrogen circulation system, the target pressure difference of the pressure difference control module, the first rotation speed of the hydrogen pump and the first opening and closing frequency of the exhaust and drain valve, wherein the pressure difference control module is used to control the pressure difference between the intake point and the exhaust point, the intake 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; The flow control valve is used to control the intake flow rate 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 speed based on the first speed, and the exhaust and drain valve is used to control opening and closing based on the first opening and closing frequency; receiving a second operating power of the hybrid electric vehicle; When a second power difference between the second operating power and the target power is within a predetermined difference threshold, a result of completion of the power load change of the hybrid vehicle is obtained, and a second speed of the hydrogen pump and a second opening and closing frequency of the exhaust and drain valve are determined, so that the hybrid vehicle can continue to operate at the second operating power, wherein the second speed is lower than the first speed, and the second opening and closing frequency is lower than the first opening and closing frequency.

2. The method according to claim 1, characterized in that Determining, based on the first power difference, 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 rotation speed of a hydrogen pump, and a first opening and closing frequency of an exhaust and drain valve, includes: Determining a difference interval to which the first power difference belongs; The target intake pressure value, the target pressure difference, the first rotational speed and the first opening and closing frequency corresponding to the difference interval are retrieved.

3. The method according to claim 1, characterized in that Determining a first speed of the hydrogen pump according to the first power difference includes: Determining hydrogen pump equipment parameters of the hydrogen pump; The first rotational speed is determined according to the first power difference and the hydrogen pump equipment parameters.

4. The method according to claim 1, characterized in that Determining a first opening and closing frequency of the exhaust and drain valve according to the first power difference includes: Determining a target exhaust pressure value according to the target pressure difference value and the target intake pressure value; The first opening and closing frequency is determined according to the target exhaust pressure value.

5. The method according to claim 1, characterized in that Determining, based on the first power difference, 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 rotation speed of a hydrogen pump, and a first opening and closing frequency of an exhaust and drain valve, includes: When the exhaust and drain valve includes an exhaust valve and a drain valve, and the first opening and closing frequency includes an exhaust opening and closing frequency and a drain opening and closing frequency, the target intake pressure value, the target pressure difference, the first speed, the exhaust opening and closing frequency of the exhaust valve, and the drain opening and closing frequency of the drain valve are determined based on the first power difference.

6. The method according to claim 1, characterized in that The method further comprises: Receiving pressure values ​​corresponding to the air inlet point and the air outlet point respectively; In the case where there is a pressure value greater than a predetermined threshold value among the corresponding pressure values, determining a pressure relief control pressure value of a pressure relief valve in the hydrogen circulation system; The pressure relief valve is used 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 respectively are less than or equal to the predetermined threshold value.

7. The method according to any one of claims 1 to 6, characterized in that: After determining the second rotation speed of the hydrogen pump and the second opening and closing frequency of the exhaust and drain valve, the method further includes: The hydrogen pump is used to control the rotation speed based on the second rotation speed, and the exhaust and drain valve is used to control opening and closing based on the second opening and closing frequency.

8. A power load changing device for a hybrid vehicle, characterized in that: include: A first determination module, configured to determine 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; a second determination module, configured to determine, based on the first power difference, a target intake pressure value of a flow control valve in a hydrogen circulation system, a target pressure difference of a pressure difference control module, a first rotation speed of a hydrogen pump, and a first opening and closing frequency of an exhaust and drain valve, wherein the pressure difference control module is configured to control a pressure difference between an intake point and an exhaust point, the intake point being located at an inlet position of a fuel cell stack in the hydrogen circulation system, and the exhaust point being located at an outlet position of the fuel cell stack; a control module, configured to control the intake flow rate based on the target intake pressure value by using the flow control valve, control the pressure difference based on the target pressure difference by using the pressure difference control module, control the speed based on the first speed by using the hydrogen pump, and control the opening and closing of the exhaust and drain valve based on the first opening and closing frequency by using the exhaust and drain valve; A receiving module, used for receiving a second operating power of the hybrid electric vehicle; The third determination module is used to obtain the result of the power load change completion of the hybrid vehicle when a second power difference between the second operating power and the target power is within a predetermined difference threshold, and to determine a second speed of the hydrogen pump and a second opening and closing frequency of the exhaust and drain valve, so that the hybrid vehicle can continue to operate at the second operating power, wherein the second speed is lower than the first speed, and the second opening and closing frequency is lower than the first opening and closing frequency.

9. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the power load variation method for a hybrid electric vehicle as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: When the instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the power load variation method for a hybrid electric vehicle as claimed in any one of claims 1 to 7.

Images