Fuel cell purging control method, device, equipment, system, vehicle and medium

Abstract

The invention discloses a fuel cell purging control method, device, equipment and system, a vehicle and a medium, is applied to the technical field of fuel cells, and is used for solving the problems that the shutdown time is prolonged, the shutdown power consumption is increased, a hydrogen circulating pump is easy to freeze and the cold start performance is poor in an anode purging scheme in the prior art. The current optimal opening frequency of a target valve at the current environment temperature is determined on the basis of the pre-calibrated optimal opening frequency, enabling the water accumulation amount of the anode system to be minimum, of the target valve in the anode system at different environment temperatures, and the target valve is controlled to operate to purge the anode system on the basis of the current optimal opening frequency. Therefore, the overall purging strategy of the anode system is executed by utilizing the pre-calibrated optimal purging condition of the target valve in the anode system, it can be ensured that the hydrogen circulating pump is not frozen in the low-temperature environment, and then the cold start performance can be improved while the shutdown time is not prolonged and the shutdown power consumption is not increased.

Description

Technical Field

[0001] The present application relates to the field of fuel cell technology, and in particular to a fuel cell purge control method, device, equipment, system, vehicle and medium. Background Art

[0002] A fuel cell system is a power generation device that generates water through hydrogen-oxygen reaction and supplies power to the outside. In a low-temperature environment, the residual liquid water inside the fuel cell system will freeze, causing the fuel cell system to malfunction and be unable to operate normally. In particular, the anode system in the fuel cell system, when the liquid water cannot be effectively discharged, the internal hydrogen circulation pump is very easy to freeze, resulting in cold start failure of the fuel cell system, thereby affecting the cold start performance of the fuel cell system.

[0003] To this end, in the prior art, when the fuel cell system is shut down, the anode system is usually purged to reduce the residual liquid water inside the anode system, thereby preventing the hydrogen circulation pump from freezing in a low temperature environment. However, this solution takes a long time to purge when the temperature of the fuel cell system body is low, which leads to a longer shutdown time and increased shutdown power consumption. Moreover, after the purge is completed, it is difficult to ensure that the residual liquid water inside the anode system is completely dried, and the hydrogen circulation pump may still freeze, resulting in a failure of the cold start of the fuel cell system, thereby affecting the cold start performance of the fuel cell system. Summary of the invention

[0004] The present application provides a fuel cell purge control method, device, equipment, system, vehicle and medium, which are used to solve the problem that the purge time of the anode system is long in the prior art, resulting in prolonged shutdown time and increased shutdown power consumption, and the purge effect of the anode system is poor, resulting in easy icing of the hydrogen circulation pump, which in turn affects the cold start performance and success rate of the fuel cell system. Specifically, the technical solution provided by the present application is as follows:

[0005] In one aspect, the present application provides a fuel cell purge control method, comprising:

[0006] Determining that an anode system of a fuel cell system meets a purge condition;

[0007] Based on the pre-calibrated optimal opening frequency of the target valve in the anode system at different ambient temperatures, determine the current optimal opening frequency of the target valve at the current ambient temperature; wherein the optimal opening frequency of the target valve at each ambient temperature is the opening frequency of the target valve at the ambient temperature that minimizes the amount of water accumulated in the anode system;

[0008] Based on the current optimal opening frequency of the target valve at the current ambient temperature, the target valve is controlled to operate to purge the anode system.

[0009] On the other hand, the present application also provides a fuel cell purge control device, comprising:

[0010] A purge determination unit, used to determine that an anode system of a fuel cell system meets a purge condition;

[0011] A frequency determination unit, for determining a current optimal opening frequency of the target valve at a current ambient temperature based on a pre-calibrated optimal opening frequency of the target valve in the anode system at different ambient temperatures; wherein the optimal opening frequency of the target valve at each ambient temperature is an opening frequency of the target valve at the ambient temperature that minimizes the amount of water accumulated in the anode system;

[0012] The purge execution unit is used to control the operation of the target valve to purge the anode system based on the current optimal opening frequency of the target valve at the current ambient temperature.

[0013] On the other hand, the present application also provides a fuel cell control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the above-mentioned fuel cell purge control method when executing the computer program.

[0014] On the other hand, the present application also provides a fuel cell system, including a fuel cell stack, an anode system for supplying fuel to the fuel cell stack, a cathode system for supplying oxidant to the fuel cell stack, a cooling system for cooling the fuel cell stack, and the above-mentioned fuel cell control device.

[0015] On the other hand, the present application also provides a new energy vehicle, including a body, a chassis frame, wheels, an electric motor, a vehicle control system, and the above-mentioned fuel cell system.

[0016] On the other hand, the present application also provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed by a processor, the above-mentioned fuel cell purge control method is implemented.

[0017] The beneficial effects of this application are as follows:

[0018] The present application can obtain the optimal purge conditions for each target valve in the anode system by pre-calibrating the optimal opening frequency of each target valve in the anode system when the water accumulation in the anode system is minimized at different ambient temperatures. Therefore, by utilizing the optimal purge conditions for each target valve in the anode system to execute the overall purge strategy of the anode system, it can be ensured that the hydrogen circulation pump does not freeze in a low-temperature environment, thereby effectively improving the cold start performance and success rate of the fuel cell system without extending the shutdown time and increasing the shutdown power consumption.

[0019] Other features and advantages of the present application will be described in the subsequent description, and in part, will become apparent from the description, or will be understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 A schematic diagram of a hydrogen circulation architecture in a fuel cell system provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of an overview of a fuel cell purge control method provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of a specific flow chart of a fuel cell purge control method provided in an embodiment of the present application;

[0024] Figure 4 A schematic diagram of the functional structure of a fuel cell purge control device provided in an embodiment of the present application;

[0025] Figure 5 A schematic diagram of the hardware structure of a fuel cell control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and beneficial effects of this application clearer, the technical solution in the embodiment of this application will be clearly and completely described below in conjunction with the drawings in the embodiment of this application. Obviously, the described embodiment is only a part of the embodiment of this application, not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] In order to facilitate those skilled in the art to better understand the present application, the technical terms involved in the present application are briefly introduced below.

[0028] A fuel cell system is a system for controlling power generation of a fuel cell. In the present application, the fuel cell system at least includes a fuel cell stack, an anode system for supplying fuel to the fuel cell stack, a cathode system for supplying oxidant to the fuel cell stack, a cooling system for cooling the fuel cell stack, and a fuel cell control device for coordinating and controlling the air pressure and flow rate at the cathode inlet of the fuel cell stack, the hydrogen pressure and flow rate at the anode inlet of the fuel cell stack, etc., so as to realize normal operation of the fuel cell stack and shutdown and purge operations. The fuel cell control device may be, but is not limited to, a fuel cell controller FCU of the fuel cell system; wherein, refer to Figure 1 As shown, the anode system at least includes a hydrogen injection valve IJV, a hydrogen circulation pump ARB, a water tank WT, a drain valve ADV and a nitrogen exhaust valve APV, etc. Specifically, the hydrogen injection valve IJV is used to control the flow of hydrogen entering the stack, the hydrogen circulation pump ARB is used to realize hydrogen circulation, the water tank WT is used to realize gas-liquid separation, the drain valve ADV is used to realize drainage, and the nitrogen exhaust valve APV is used to realize nitrogen and water drainage.

[0029] New energy vehicles refer to automobiles that use unconventional automotive fuels as their power source and have new technologies and structures. In this application, new energy vehicles include at least a body, a chassis frame, wheels, an electric motor, a vehicle control system, and a fuel cell system; wherein the vehicle control system can control operations such as shutdown and power generation of the fuel cell system. For example, the vehicle control system can send a shutdown command to a fuel cell control device such as an FCU in the fuel cell system through the vehicle controller VCU to control the shutdown of the fuel cell system.

[0030] It should be noted that the "and / or" mentioned in this application describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0031] After introducing the technical terms involved in this application, the application scenarios and design concepts of this application are briefly introduced.

[0032] In a fuel cell system, in order to solve the problems of prolonged shutdown time, increased shutdown power consumption, easy freezing of the hydrogen circulation pump, and low cold start performance and success rate of the fuel cell system by purging the anode system to reduce the residual liquid water in the anode system, a traditional solution is to add a heating rod to break the ice of the hydrogen circulation pump. However, this method of adding a heating rod not only increases the complexity of the fuel cell system and increases the cost of the fuel cell system, but also increases the risk of heating rod failure and the hydrogen safety risk caused by the failure of the heating rod. Another traditional solution is to use an ejector instead of a hydrogen circulation pump in the fuel cell system. This method of using an ejector to replace the hydrogen circulation pump has low efficiency of the ejector at low power, resulting in low efficiency and poor durability of the fuel cell system.

[0033] To this end, the present application pre-calibrates the optimal opening frequency of each target valve in the anode system when the amount of water accumulated in the anode system is minimized at different ambient temperatures. When determining that the anode system of the fuel cell system meets the purge condition, the optimal opening frequency of the target valve in the anode system at different ambient temperatures that is pre-calibrated to minimize the amount of water accumulated in the anode system can be used to determine the current optimal opening frequency of the target valve that minimizes the amount of water accumulated in the anode system at the current ambient temperature. Based on the current optimal opening frequency of the target valve that minimizes the amount of water accumulated in the anode system at the current ambient temperature, the target valve is controlled to operate to purge the anode system. In this way, by pre-calibrating the optimal opening frequency of each target valve in the anode system when the amount of water accumulated in the anode system is minimized at different ambient temperatures, the optimal purge condition of each target valve in the anode system can be obtained, and thus by utilizing the optimal purge condition of each target valve in the anode system to execute the overall purge strategy of the anode system, it can be ensured that the hydrogen circulation pump does not freeze in a low temperature environment, and thus the cold start performance and success rate of the fuel cell system can be effectively improved without extending the shutdown time and increasing the shutdown power consumption, and at the same time, the shortcomings of the fuel cell system existing in the traditional solution, such as high complexity and cost, poor safety and durability, etc.

[0034] After introducing the application scenarios and design ideas of the present application, the technical solutions provided by the present application are described in detail below.

[0035] The present application provides a fuel cell purge control method, which is applied to a fuel cell control device in a fuel cell system, such as an FCU in a fuel cell system, Figure 2 As shown, the general flow of the fuel cell purge control method provided in the embodiment of the present application is as follows:

[0036] Step 201: Determine whether the anode system of the fuel cell system meets the purge condition.

[0037] In actual applications, the VCU in the vehicle control system can control the shutdown of the fuel cell system by sending a shutdown command to the FCU in the fuel cell system. When the FCU in the fuel cell system receives the shutdown command sent by the VCU in the vehicle control system, it can obtain the current ambient temperature and, when it is determined that the current ambient temperature is not higher than the set temperature, determine that the purge conditions are met, that is, determine that the anode system of the fuel cell system meets the purge conditions.

[0038] Step 202: Based on the pre-calibrated optimal opening frequency of the target valve in the anode system at different ambient temperatures, determine the current optimal opening frequency of the target valve at the current ambient temperature; wherein the optimal opening frequency of the target valve at each ambient temperature is the opening frequency of the target valve at the ambient temperature when the water accumulation in the anode system is minimized.

[0039] In the embodiment of the present application, due to the temperature difference between the inside and outside of the anode system at low temperatures, the amount of condensed water at low temperatures is different. For this reason, the optimal opening frequency of the target valve in the anode system at different ambient temperatures can be calibrated in advance to ensure that the target valve in the anode system under all low temperature working conditions can discharge the liquid water in the anode system in time and ensure that the amount of residual liquid water in the anode system is minimized, effectively avoiding the freezing of the hydrogen circulation pump due to the residual liquid water in the anode system at low temperatures.

[0040] In specific implementation, for each set ambient temperature, while keeping the set ambient temperature unchanged, the opening frequency of the target valve can be continuously adjusted (for example, increasing or decreasing) and the amount of water accumulated in the anode system can be detected to determine the opening frequency of the target valve when the amount of water accumulated in the anode system is minimized, which is the optimal opening frequency of the target valve when the amount of water accumulated in the anode system is minimized at the set ambient temperature. Thus, the optimal opening frequency of the target valve when the amount of water accumulated in the anode system is minimized at each set ambient temperature as shown in Table 1 below.

[0041] Table 1.

[0042]

[0043] Then, after obtaining the optimal opening frequency of the target valve at each set ambient temperature, the optimal opening frequency of the target valve at different ambient temperatures can be fitted based on the optimal opening frequency of the target valve at each set ambient temperature.

[0044] In practical applications, the target valve at least includes the drain valve ADV and / or the nitrogen drain valve APV in the anode system. Based on this, when pre-calibrating the optimal opening frequency of the target valve at different ambient temperatures, on the one hand, for each set ambient temperature, while keeping the set ambient temperature unchanged, the opening frequency of the drain valve ADV can be continuously adjusted (for example, increasing or decreasing) and the amount of water accumulated in the water tank WT in the anode system can be detected to determine the opening frequency of the drain valve ADV when the amount of water accumulated in the water tank WT in the anode system is minimized as the optimal opening frequency of the drain valve ADV at the set ambient temperature. As a result, the optimal opening frequency of the drain valve ADV when the amount of water accumulated in the water tank WT in the anode system is minimized at each set ambient temperature as shown in Table 2 below. Furthermore, based on the optimal opening frequency of the drain valve ADV when the amount of water accumulated in the water tank WT in the anode system is minimized at each set ambient temperature, the optimal opening frequency of the drain valve ADV when the amount of water accumulated in the water tank WT in the anode system is minimized at different ambient temperatures can be fitted.

[0045] Table 2.

[0046]

[0047] On the other hand, for each set ambient temperature, while keeping the set ambient temperature unchanged, the opening frequency of the nitrogen exhaust and drain valve APV is continuously adjusted (for example, increasing or decreasing) and the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is detected to determine the opening frequency of the nitrogen exhaust and drain valve APV when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized as the optimal opening frequency of the nitrogen exhaust and drain valve APV at the set ambient temperature. Thus, the optimal opening frequency of the nitrogen exhaust and drain valve APV when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized at each set ambient temperature as shown in Table 3 below. Furthermore, based on the optimal opening frequency of the nitrogen exhaust and drain valve APV when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized at each set ambient temperature, the optimal opening frequency of the nitrogen exhaust and drain valve APV when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized at different ambient temperatures can be fitted.

[0048] Table 3.

[0049]

[0050] It is worth mentioning that in order to improve the accuracy of calibration of the optimal opening frequency of the nitrogen exhaust and drain valve APV when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized at different ambient temperatures, when calibrating the optimal opening frequency of the nitrogen exhaust and drain valve APV when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized at different ambient temperatures, for each set ambient temperature, the hydrogen circulation pump ARB in the anode system can be first controlled to operate at the optimal drainage speed (wherein the calibration of the optimal drainage speed is described below), and then, while keeping the set ambient temperature unchanged, the opening frequency of the nitrogen exhaust and drain valve APV is continuously adjusted (for example, increasing or decreasing) and the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is detected to determine the opening frequency of the nitrogen exhaust and drain valve APV to minimize the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system. The opening frequency when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized is the optimal opening frequency of the nitrogen exhaust and drain valve APV at the set ambient temperature. Thus, the optimal opening frequency of the nitrogen exhaust and drain valve APV when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized when the hydrogen circulation pump ARB in the anode system runs at the optimal drainage speed at various set ambient temperatures as shown in the following Table 4 can be obtained. Furthermore, based on the optimal opening frequency of the nitrogen exhaust and drain valve APV when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized when the hydrogen circulation pump ARB in the anode system runs at the optimal drainage speed at various set ambient temperatures, the optimal opening frequency of the nitrogen exhaust and drain valve APV when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized when the hydrogen circulation pump ARB in the anode system runs at the optimal drainage speed at different ambient temperatures can be fitted.

[0051] Table 4.

[0052]

[0053] In addition, in the embodiment of the present application, in order to achieve a more accurate calibration of the optimal opening frequency of the nitrogen discharge and drainage valve APV when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized at different ambient temperatures, and in order to further reduce the amount of liquid water remaining in the anode system and improve the purge effect of the anode system, the optimal drainage speed (i.e., the optimal impeller speed) of the hydrogen circulation pump ARB when the amount of water accumulated at the bottom is minimized at different ambient temperatures can also be calibrated in advance. Specifically, the nitrogen discharge and drainage valve APV in the anode system can be controlled to be closed first, and then, for each set ambient temperature, while keeping the set ambient temperature unchanged, the impeller speed of the hydrogen circulation pump ARB in the anode system can be continuously adjusted (for example, increasing or decreasing) The impeller speed is measured and the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is detected, and the impeller speed of the hydrogen circulation pump ARB when the amount of water accumulated at the bottom is minimized is determined as the optimal drainage speed of the hydrogen circulation pump ARB at the set ambient temperature, thereby obtaining the optimal drainage speed of the hydrogen circulation pump ARB when the amount of water accumulated at the bottom is minimized at each set ambient temperature as shown in the following Table 5. Furthermore, after obtaining the optimal drainage speed of the hydrogen circulation pump ARB when the amount of water accumulated at the bottom is minimized at each set ambient temperature, the optimal drainage speed of the hydrogen circulation pump ARB when the amount of water accumulated at the bottom is minimized at different ambient temperatures can be fitted based on the optimal drainage speed of the hydrogen circulation pump ARB when the amount of water accumulated at the bottom is minimized at each set ambient temperature.

[0054] Table 5.

[0055] Ambient temperature / 0 -10 -20 -30 …… ARB optimal drainage speed 400rpm 600rpm 800rpm 1000rpm …… Minimum water accumulation at the bottom of ARB 1 ml 0ml 0ml 1ml ……

[0056] Furthermore, after completing the above calibration operation, when it is determined that the anode system of the fuel cell system meets the purge condition, the current optimal opening frequency of the target valve at the current ambient temperature can be determined based on the optimal opening frequency of the target valve in the anode system at different ambient temperatures that was pre-calibrated. In a specific implementation, corresponding to the above calibration operation, the target valve at least includes a drain valve ADV and / or a nitrogen drain valve APV in the anode system. Based on this, when determining the current optimal opening frequency of the target valve at the current ambient temperature based on the optimal opening frequency of the target valve in the anode system at different ambient temperatures that was pre-calibrated, it can be Based on the pre-calibrated optimal opening frequency of the drain valve ADV in the anode system when the amount of water accumulated in the water tank WT in the anode system is minimized at different ambient temperatures, the current optimal opening frequency of the drain valve ADV when the amount of water accumulated in the water tank WT in the anode system is minimized at the current ambient temperature is determined; and / or, based on the pre-calibrated optimal opening frequency of the nitrogen drain valve APV in the anode system when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized at different ambient temperatures, the current optimal opening frequency of the nitrogen drain valve APV when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized at the current ambient temperature is determined. Of course, in order to further reduce the amount of liquid water accumulated in the anode system and improve the anode system purge effect, when determining the current optimal opening frequency of the target valve at the current ambient temperature based on the pre-calibrated optimal opening frequency of the target valve in the anode system at different ambient temperatures, the current optimal drainage speed of the hydrogen circulation pump ARB at the current ambient temperature when the amount of water accumulated at the bottom is minimized can also be determined based on the pre-calibrated optimal drainage speed of the hydrogen circulation pump ARB in the anode system when the amount of water accumulated at the bottom is minimized at different ambient temperatures.

[0057] Step 203: Based on the current optimal opening frequency of the target valve at the current ambient temperature, control the target valve to operate to purge the anode system.

[0058] Correspondingly, in specific implementation, when the target valve is controlled to operate to purge the anode system based on the current optimal opening frequency of the target valve at the current ambient temperature, the drain valve ADV can be controlled to operate to purge the anode system based on the current optimal opening frequency of the drain valve ADV when the amount of water accumulated in the water tank WT in the anode system is minimized at the current ambient temperature; and / or, the nitrogen drain valve APV is controlled to operate to purge the anode system based on the current optimal opening frequency of the nitrogen drain valve APV when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB in the anode system is minimized at the current ambient temperature. Of course, in order to further reduce the amount of liquid water remaining in the anode system and improve the purge effect of the anode system, when the target valve is controlled to operate to purge the anode system based on the current optimal opening frequency of the target valve at the current ambient temperature, the hydrogen circulation pump ARB can also be controlled to operate to purge the anode system based on the current optimal drainage speed when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB is minimized at the current ambient temperature.

[0059] It is worth mentioning that in the embodiment of the present application, in order to further reduce the amount of liquid water remaining in the anode system and improve the purging effect of the anode system, when controlling the target valve to operate to purge the anode system based on the current optimal opening frequency of the target valve at the current ambient temperature, it is also possible to determine the current optimal opening of the hydrogen injection valve IJV when the amount of water accumulated in the anode system is minimized at the current ambient temperature based on the optimal opening of the hydrogen injection valve IJV in the anode system that is pre-calibrated to minimize the amount of water accumulated in the anode system at different ambient temperatures, and control the operation of the hydrogen injection valve IJV to purge the anode system based on the current optimal opening of the hydrogen injection valve IJV when the amount of water accumulated in the anode system is minimized at the current ambient temperature; wherein, when the hydrogen injection valve IJV is used at different ambient temperatures When calibrating the optimal opening when the amount of water accumulated in the anode system is minimized, for each set ambient temperature, while keeping the set ambient temperature unchanged, the opening of the hydrogen injection valve IJV can be continuously adjusted (for example, increasing or decreasing) and the amount of water accumulated in the anode system can be detected to determine that the opening of the hydrogen injection valve IJV at the set ambient temperature minimizes the amount of water accumulated in the anode system, thereby obtaining the optimal opening of the hydrogen injection valve IJV at each set ambient temperature that minimizes the amount of water accumulated in the anode system. Furthermore, based on the optimal opening of the hydrogen injection valve IJV at each set ambient temperature that minimizes the amount of water accumulated in the anode system, the optimal opening of the hydrogen injection valve IJV at different set ambient temperatures that minimizes the amount of water accumulated in the anode system can be fitted.

[0060] In the embodiment of the present application, by using the pre-calibrated drain valve ADV at the optimal opening frequency when the amount of water accumulated in the water tank WT is minimized at different ambient temperatures, the nitrogen drain valve APV at the optimal opening frequency when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB is minimized at different ambient temperatures (or the nitrogen drain valve APV at the optimal opening frequency when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB is minimized when the hydrogen circulation pump ARB runs at the optimal drainage speed at different ambient temperatures), at least one of the optimal drainage speeds when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB is minimized at different ambient temperatures to perform anode purge, it can be ensured that the hydrogen circulation pump ARB does not freeze in a low temperature environment, thereby improving the cold start performance and cold start success rate of the fuel cell system without extending the shutdown time or increasing the shutdown power consumption, and, by using the pre-calibrated drain valve ADV at During the process of anode purge using at least one of the following: the optimal opening frequency when the amount of water accumulated in the water tank WT is minimized at different ambient temperatures, the optimal opening frequency of the nitrogen exhaust and drain valve APV when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB is minimized at different ambient temperatures (or the optimal opening frequency of the nitrogen exhaust and drain valve APV when the hydrogen circulation pump ARB runs at the optimal drainage speed at different ambient temperatures to minimize the amount of water accumulated at the bottom of the hydrogen circulation pump ARB), and the optimal drainage speed of the hydrogen circulation pump ARB when the amount of water accumulated at the bottom is minimized at different ambient temperatures, the anode purge can be performed in combination with the pre-calibrated optimal opening of the hydrogen injection valve IJV when the amount of water accumulated in the anode system is minimized at each set ambient temperature. This can further reduce the amount of liquid water remaining in the anode system, improve the anode system purge effect, and enhance the cold start performance and cold start success rate of the fuel cell system.

[0061] Next, taking “performing anode purge based on the pre-calibrated results of the drain valve ADV, the nitrogen drain valve APV, the hydrogen circulation pump ARB and the hydrogen injection valve IJV” as an example, the fuel cell purge control method provided in the embodiment of the present application is further described in detail, see Figure 3 As shown, the specific process of the fuel cell purge control method provided in the embodiment of the present application is as follows:

[0062] Step 301: Obtain the optimal opening frequency of the drain valve ADV when the amount of water accumulated in the water tank WT is minimized at each set ambient temperature. Based on the optimal opening frequency of the drain valve ADV when the amount of water accumulated in the water tank WT is minimized at each set ambient temperature, fit the optimal opening frequency of the drain valve ADV when the amount of water accumulated in the water tank WT is minimized at different ambient temperatures and save it.

[0063] Step 302: After controlling the nitrogen drain valve APV to close, obtain the optimal drainage speed of the hydrogen circulation pump ARB when the amount of water accumulated at the bottom is minimized at each set ambient temperature. Based on the optimal drainage speed of the hydrogen circulation pump ARB when the amount of water accumulated at the bottom is minimized at each set ambient temperature, fit the optimal drainage speed of the hydrogen circulation pump ARB when the amount of water accumulated at the bottom is minimized at different ambient temperatures and save it, and continue to execute step 303.

[0064] Step 303: After controlling the nitrogen exhaust drain valve APV to open, obtain the optimal opening frequency of the nitrogen exhaust drain valve APV at each set ambient temperature when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB is minimized when the hydrogen circulation pump ARB runs at the optimal drainage speed. Based on the optimal opening frequency of the nitrogen exhaust drain valve APV at each set ambient temperature when the amount of water accumulated at the bottom of the hydrogen circulation pump ARB is minimized when the hydrogen circulation pump ARB runs at the optimal drainage speed, fit the optimal opening frequency of the nitrogen exhaust drain valve APV at different ambient temperatures when the hydrogen circulation pump ARB runs at the optimal drainage speed to minimize the amount of water accumulated at the bottom of the hydrogen circulation pump ARB and save it.

[0065] Step 304: Obtain the optimal opening of the hydrogen injection valve IJV when the amount of water accumulated in the anode system is minimized at each set ambient temperature. Based on the optimal opening of the hydrogen injection valve IJV when the amount of water accumulated in the anode system is minimized at each set ambient temperature, fit the optimal opening of the hydrogen injection valve IJV when the amount of water accumulated in the anode system is minimized at different set ambient temperatures and save it.

[0066] The execution order of step 301, step 302 and step 304 can be changed arbitrarily and is not limited in specific implementation.

[0067] Step 305: When receiving the shutdown command sent by the VCU in the vehicle control system, the current ambient temperature is obtained, and when it is determined that the current ambient temperature is not higher than the set temperature, it is determined that the anode system of the fuel cell system meets the purge condition.

[0068] Step 306: Based on the pre-calibrated optimal opening frequency of the drain valve ADV when the water accumulation in the water tank WT is minimized at different ambient temperatures, determine the current optimal opening frequency of the drain valve ADV when the water accumulation in the water tank WT is minimized at the current ambient temperature; and based on the current optimal opening frequency of the drain valve ADV when the water accumulation in the water tank WT is minimized at the current ambient temperature, control the operation of the drain valve ADV to purge the anode system.

[0069] Step 307: Based on the pre-calibrated optimal drainage speed of the hydrogen circulation pump ARB when the amount of water accumulated at the bottom is minimized at different ambient temperatures, determine the current optimal drainage speed of the hydrogen circulation pump ARB when the amount of water accumulated at the bottom is minimized at the current ambient temperature; and based on the current optimal drainage speed of the hydrogen circulation pump ARB when the amount of water accumulated at the bottom is minimized at the current ambient temperature, control the operation of the hydrogen circulation pump ARB to purge the anode system.

[0070] Step 308: Based on the pre-calibrated optimal opening frequency of the nitrogen exhaust drain valve APV at different ambient temperatures when the hydrogen circulation pump ARB runs at the optimal drainage speed to minimize the amount of water accumulated at the bottom of the hydrogen circulation pump ARB, determine the current optimal opening frequency of the nitrogen exhaust drain valve APV at the current ambient temperature when the hydrogen circulation pump ARB runs at the optimal drainage speed to minimize the amount of water accumulated at the bottom of the hydrogen circulation pump ARB; and based on the current optimal opening frequency of the nitrogen exhaust drain valve APV at the current ambient temperature when the hydrogen circulation pump ARB runs at the optimal drainage speed to minimize the amount of water accumulated at the bottom of the hydrogen circulation pump ARB, control the operation of the nitrogen exhaust drain valve APV to purge the anode system.

[0071] Step 309: Based on the pre-calibrated optimal opening of the hydrogen injection valve IJV when the water accumulation in the anode system is minimized at different ambient temperatures, determine the current optimal opening of the hydrogen injection valve IJV when the water accumulation in the anode system is minimized at the current ambient temperature, and control the operation of the hydrogen injection valve IJV to purge the anode system at the current optimal opening of the hydrogen injection valve IJV to minimize the water accumulation in the anode system at the current ambient temperature.

[0072] The execution order of step 306 to step 309 can be changed arbitrarily and is not limited in specific implementation.

[0073] Based on the above embodiments, the present application provides a fuel cell purge control device, referring to Figure 4 As shown, the fuel cell purge control device 400 provided in the embodiment of the present application at least includes:

[0074] A purge determination unit 401, used to determine whether an anode system of a fuel cell system meets a purge condition;

[0075] The frequency determination unit 402 is used to determine the current optimal opening frequency of the target valve at the current ambient temperature based on the pre-calibrated optimal opening frequency of the target valve in the anode system at different ambient temperatures; wherein the optimal opening frequency of the target valve at each ambient temperature is the opening frequency of the target valve at the ambient temperature that minimizes the amount of water accumulated in the anode system;

[0076] The purge execution unit 403 is used to control the operation of the target valve to purge the anode system based on the current optimal opening frequency of the target valve at the current ambient temperature.

[0077] In a possible implementation, the target valve includes a drain valve and / or a nitrogen drain valve in the anode system; when determining the current optimal opening frequency of the target valve at the current ambient temperature based on the pre-calibrated optimal opening frequency of the target valve in the anode system at different ambient temperatures, the frequency determination unit 402 is specifically used to:

[0078] Based on the pre-calibrated optimal opening frequency of the drain valve in the anode system at different ambient temperatures, the current optimal opening frequency of the drain valve at the current ambient temperature is determined; wherein the optimal opening frequency of the drain valve at each ambient temperature is the opening frequency of the drain valve at the ambient temperature at which the amount of water accumulated in the water tank of the anode system is minimized;

[0079] and / or;

[0080] Based on the pre-calibrated optimal opening frequency of the nitrogen exhaust and drain valve in the anode system at different ambient temperatures, the current optimal opening frequency of the nitrogen exhaust and drain valve at the current ambient temperature is determined; wherein the optimal opening frequency of the nitrogen exhaust and drain valve at each ambient temperature is the opening frequency of the nitrogen exhaust and drain valve when the hydrogen circulation pump in the anode system runs at the optimal drainage speed at the ambient temperature so that the amount of water accumulated at the bottom of the hydrogen circulation pump is minimized.

[0081] In a possible implementation, the fuel cell purge control device 400 provided in the embodiment of the present application further includes:

[0082] The valve calibration unit 404 is used to obtain the optimal opening frequency of the target valve at each set ambient temperature, and based on the optimal opening frequency of the target valve at each set ambient temperature, fit the optimal opening frequency of the target valve at different ambient temperatures.

[0083] In a possible implementation, when determining the current optimal opening frequency of the target valve at the current ambient temperature based on the pre-calibrated optimal opening frequency of the target valve in the anode system at different ambient temperatures, the frequency determination unit 402 is further configured to:

[0084] Based on the pre-calibrated optimal drainage speed of the hydrogen circulation pump in the anode system at different ambient temperatures, the current optimal drainage speed of the hydrogen circulation pump at the current ambient temperature is determined; wherein, the optimal drainage speed of the hydrogen circulation pump at each ambient temperature is the impeller speed of the hydrogen circulation pump at the ambient temperature when the amount of water accumulated at the bottom is minimized.

[0085] In a possible implementation, based on the current optimal opening frequency of the target valve at the current ambient temperature, when the target valve is controlled to operate to purge the anode system, the purge execution unit 403 is further configured to:

[0086] Based on the current optimal drainage speed of the hydrogen circulation pump at the current ambient temperature, the hydrogen circulation pump is controlled to operate to purge the anode system.

[0087] In a possible implementation, the fuel cell purge control device 400 provided in the embodiment of the present application further includes:

[0088] The hydrogen pump calibration unit 405 is used to obtain the optimal drainage speed of the hydrogen circulation pump at each set ambient temperature, and based on the optimal drainage speed of the hydrogen circulation pump at each set ambient temperature, fit the optimal drainage speed of the hydrogen circulation pump at different ambient temperatures.

[0089] In a possible implementation, based on the current optimal opening frequency of the target valve at the current ambient temperature, when the target valve is controlled to operate to purge the anode system, the purge execution unit 403 is further configured to:

[0090] Based on the pre-calibrated optimal opening of the hydrogen injection valve in the anode system at different ambient temperatures, the current optimal opening of the hydrogen injection valve at the current ambient temperature is determined; wherein the optimal opening of the hydrogen injection valve at each ambient temperature is the opening of the hydrogen injection valve at the ambient temperature that minimizes the amount of water accumulated in the anode system;

[0091] Based on the current optimal opening of the hydrogen injection valve at the current ambient temperature, the hydrogen injection valve is controlled to operate to purge the anode system.

[0092] It should be noted that the principle of solving the technical problem by the fuel cell purge control device 400 provided in the embodiment of the present application is similar to the fuel cell purge control method provided in the embodiment of the present application. Therefore, the implementation of the fuel cell purge control device 400 provided in the embodiment of the present application can refer to the implementation of the fuel cell purge control method provided in the embodiment of the present application, and the repeated parts will not be repeated.

[0093] After introducing the fuel cell purge control method and apparatus provided in the embodiments of the present application, the fuel cell control device provided in the embodiments of the present application is briefly introduced next.

[0094] The fuel cell control device provided in the embodiment of the present application may be, but is not limited to, a fuel cell controller in a fuel cell system. Figure 5As shown, the fuel cell control device 500 provided in the embodiment of the present application includes at least: a processor 501, a memory 502, and a computer program stored in the memory 502 and executable on the processor 501. When the processor 501 executes the computer program, the fuel cell purge control method provided in the embodiment of the present application is implemented.

[0095] The fuel cell control device 500 provided in the embodiment of the present application may also include a bus 503 connecting different components (including the processor 501 and the memory 502). The bus 503 represents one or more of several types of bus structures, including a memory bus, a peripheral bus, a local bus, and the like.

[0096] The memory 502 may include a readable medium in the form of a volatile memory, such as a RAM (Random Access Memory) 5021 and / or a cache memory 5022 , and may further include a ROM (Read Only Memory) 5023 .

[0097] The memory 502 may also include a program tool 5025 having a set (at least one) of program modules 5024, wherein the program modules 5024 include but are not limited to: an operating subsystem, one or more application programs, other program modules, and program data, each of which or some combination may include the implementation of a network environment.

[0098] The fuel cell control device 500 may also communicate with one or more external devices 504 (e.g., keyboards, remote controls, etc.), and may also communicate with one or more devices that enable a user to interact with the fuel cell control device 500 (e.g., mobile phones, computers, etc.), and / or communicate with any device that enables the fuel cell control device 500 to communicate with one or more other fuel cell control devices 500 (e.g., routers, modems, etc.). Such communication may be performed through an I / O (Input / Output) interface 505. Furthermore, the fuel cell control device 500 may also communicate with one or more networks (e.g., LAN (Local Area Network), WAN (Wide Area Network) and / or public networks, such as the Internet) through a network adapter 506. Figure 5 As shown, the network adapter 506 communicates with other modules of the fuel cell control device 500 via the bus 503. It should be understood that although Figure 5Not shown, other hardware and / or software modules may be used in conjunction with the fuel cell control device 500, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (Redundant Arrays of Independent Disks) subsystems, tape drives, and data backup storage subsystems.

[0099] It should be noted that Figure 5 The fuel cell control device 500 shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0100] In addition, the embodiment of the present application further provides a computer-readable storage medium, which stores computer instructions, and when the computer instructions are executed by the processor, the fuel cell purge control method provided in the embodiment of the present application is implemented. Specifically, the computer instructions can be built into the processor, so that the processor implements the fuel cell purge control method provided in the embodiment of the present application by executing the built-in computer instructions.

[0101] In addition, the fuel cell purge control method provided in the embodiment of the present application can also be implemented as a program product, which includes a program code. When the program code is executed by a processor, the fuel cell purge control method provided in the embodiment of the present application is implemented.

[0102] The program product provided in the embodiments of the present application may adopt any combination of one or more readable media, wherein the readable medium may be a readable signal medium or a readable storage medium, and the readable storage medium may be but is not limited to an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any combination of the above. Specifically, more specific examples of readable storage media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable disk, a hard disk, RAM, ROM, EPROM (Erasable Programmable Read Only Memory), optical fiber, CD-ROM (Compact Disc Read-Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0103] The program product provided in the embodiment of the present application may adopt a CD-ROM and include program code, and may also be run on a fuel cell control device. However, the program product provided in the embodiment of the present application is not limited thereto. In the embodiment of the present application, the readable storage medium may be any tangible medium containing or storing a program, and the program may be used by or in combination with an instruction execution system, apparatus, or device.

[0104] It should be noted that, although several units or subunits of the device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided into multiple units to be embodied.

[0105] In addition, although the operations of the method of the present application are described in a specific order in the drawings, this does not require or imply that the operations must be performed in this specific order, or that all the operations shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0106] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0107] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A fuel cell purge control method, characterized in that: include: Determining that an anode system of a fuel cell system meets a purge condition; Based on the pre-calibrated optimal opening frequency of the target valve in the anode system at different ambient temperatures, determine the current optimal opening frequency of the target valve at the current ambient temperature; wherein the optimal opening frequency of the target valve at each ambient temperature is the opening frequency of the target valve at the ambient temperature that minimizes the amount of water accumulated in the anode system; Based on the current optimal opening frequency of the target valve at the current ambient temperature, the target valve is controlled to operate to purge the anode system.

2. The fuel cell purge control method according to claim 1, characterized in that: The target valve includes a drain valve and / or a nitrogen drain valve in the anode system; based on the pre-calibrated optimal opening frequency of the target valve in the anode system at different ambient temperatures, determining the current optimal opening frequency of the target valve at the current ambient temperature includes: Based on the pre-calibrated optimal opening frequency of the drain valve in the anode system at different ambient temperatures, determining the current optimal opening frequency of the drain valve at the current ambient temperature; wherein the optimal opening frequency of the drain valve at each ambient temperature is the opening frequency of the drain valve at the ambient temperature at which the amount of water accumulated in the water tank of the anode system is minimized; and / or; Based on the pre-calibrated optimal opening frequencies of the nitrogen exhaust and drain valve in the anode system at different ambient temperatures, the current optimal opening frequency of the nitrogen exhaust and drain valve at the current ambient temperature is determined; wherein the optimal opening frequency of the nitrogen exhaust and drain valve at each ambient temperature is the opening frequency of the nitrogen exhaust and drain valve at the ambient temperature when the hydrogen circulation pump in the anode system runs at the optimal drainage speed so that the amount of water accumulated at the bottom of the hydrogen circulation pump is minimized.

3. The fuel cell purge control method according to claim 1, characterized in that: Before determining that the anode system of the fuel cell system meets the purge conditions, it also includes: The optimal opening frequency of the target valve at each set ambient temperature is obtained, and based on the optimal opening frequency of the target valve at each set ambient temperature, the optimal opening frequency of the target valve at the different ambient temperatures is fitted.

4. The fuel cell purge control method according to claim 1, characterized in that: When determining the current optimal opening frequency of the target valve at the current ambient temperature based on the pre-calibrated optimal opening frequency of the target valve in the anode system at different ambient temperatures, the method further includes: Based on the pre-calibrated optimal drainage speeds of the hydrogen circulation pump in the anode system at different ambient temperatures, the current optimal drainage speed of the hydrogen circulation pump at the current ambient temperature is determined; wherein the optimal drainage speed of the hydrogen circulation pump at each ambient temperature is the impeller speed of the hydrogen circulation pump at the ambient temperature when the amount of water accumulated at the bottom is minimized.

5. The fuel cell purge control method according to claim 4, characterized in that: When the target valve is controlled to operate to purge the anode system based on the current optimal opening frequency of the target valve at the current ambient temperature, the method further includes: Based on the current optimal drainage speed of the hydrogen circulation pump at the current ambient temperature, the hydrogen circulation pump is controlled to operate to purge the anode system.

6. The fuel cell purge control method according to claim 4, characterized in that: Before determining that the anode system of the fuel cell system meets the purge conditions, it also includes: The optimal drainage speed of the hydrogen circulation pump at each set ambient temperature is obtained, and based on the optimal drainage speed of the hydrogen circulation pump at each set ambient temperature, the optimal drainage speed of the hydrogen circulation pump at the different ambient temperatures is fitted.

7. The fuel cell purge control method according to any one of claims 1 to 6, characterized in that: When the target valve is controlled to operate to purge the anode system based on the current optimal opening frequency of the target valve at the current ambient temperature, the method further includes: Based on the pre-calibrated optimal openings of the hydrogen injection valve in the anode system at different ambient temperatures, determining the current optimal opening of the hydrogen injection valve at the current ambient temperature; wherein the optimal opening of the hydrogen injection valve at each ambient temperature is the opening of the hydrogen injection valve at the ambient temperature that minimizes the amount of water accumulated in the anode system; Based on the current optimal opening of the hydrogen injection valve at the current ambient temperature, the hydrogen injection valve is controlled to operate so as to purge the anode system.

8. A fuel cell purge control device, characterized in that: include: A purge determination unit, used to determine that an anode system of a fuel cell system meets a purge condition; A frequency determination unit, for determining a current optimal opening frequency of the target valve in the anode system at different ambient temperatures based on a pre-calibrated optimal opening frequency of the target valve in the anode system; wherein the optimal opening frequency of the target valve in each ambient temperature is the opening frequency of the target valve at the ambient temperature that minimizes the amount of water accumulated in the anode system; A purge execution unit is used to control the operation of the target valve to purge the anode system based on the current optimal opening frequency of the target valve at the current ambient temperature.

9. A fuel cell control device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the fuel cell purge control method according to any one of claims 1 to 7 when executing the computer program.

10. A fuel cell system, comprising a fuel cell stack, an anode system for supplying fuel to the fuel cell stack, a cathode system for supplying oxidant to the fuel cell stack, and a cooling system for cooling the fuel cell stack, characterized in that: Also included is the fuel cell control device as claimed in claim 9.

11. A new energy vehicle, comprising a vehicle body, a chassis frame, wheels, an electric motor, and a vehicle control system, characterized in that: Also included is the fuel cell system as claimed in claim 10.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the fuel cell purge control method according to any one of claims 1 to 7 is implemented.

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