Method and apparatus for activation control of a hydrogen fuel cell power system

Abstract

The application relates to an activation control method and device of a hydrogen fuel cell power generation system, and is applied to the technical field of fuel cells.The method comprises the following steps: when starting for the first time, current density is pulled from a starting current density to an Nth current density; when the temperature of a stack inlet reaches an Nth temperature, the stack is operated for an Nth time length at the Nth current density, so that the deviation of the single-piece voltage of the stack is less than an Nth voltage difference; the temperature of the stack inlet is reduced and the stack is operated for a second preset time period; the current density is reduced to a preset current density; if N does not reach K, N is updated to N+1, the starting current density is updated to the preset current density, and the step of pulling the current density from the starting current density to the Nth current density is returned; if N reaches K, the current density is pulled to a larger current density; when the temperature of the stack inlet reaches a higher temperature, the stack is operated for a K+1 time length; if the deviation is less than a smaller voltage difference and the output power is greater than or equal to a rated power, it is determined that the activation of the stack is completed. The method can realize the rapid activation of the stack.

Description

Technical Field

[0001] The present application relates to the field of fuel cell technology, and in particular to an activation control method and device for a hydrogen fuel cell power generation system. Background Art

[0002] Hydrogen fuel cell technology, an advanced power generation technology that directly converts the chemical energy of hydrogen into electricity, has become a global research and development hotspot in the energy sector and a key direction for future energy development due to its zero-emissions, high energy conversion efficiency, and flexible application potential. Before a hydrogen fuel cell power generation system can operate normally, the stack must be activated to activate the membrane electrodes within the stack and achieve higher performance output.

[0003] In related technologies, the stack can be activated directly using a hydrogen fuel cell power generation system. Specifically, during the initial operation of the hydrogen fuel cell power generation system, the stack is typically activated by repeatedly loading the system and operating it at high current for extended periods of time to achieve acceptable output performance. However, this method struggles to maintain humidity within the stack and requires a longer activation time. Furthermore, frequent load changes are required, which reduces the service life of the stack's core materials. Summary of the Invention

[0004] In order to solve the above technical problems, the present application provides an activation control method, device, electronic device and storage medium for a hydrogen fuel cell power generation system.

[0005] According to a first aspect of the present application, there is provided an activation control method for a hydrogen fuel cell power generation system, comprising:

[0006] When the hydrogen fuel cell power generation system is first started, the current density of the hydrogen fuel cell power generation system is increased from the starting current density to the Nth current density according to the Nth loading speed; the initial value of N is 1; the initial value of the starting current density is 0; the Nth loading speed and the Nth current density increase as N increases;

[0007] When the temperature of the fuel cell stack inlet reaches an Nth temperature, the hydrogen fuel cell power generation system is operated at the Nth current density for an Nth time period; the Nth temperature increases as N increases;

[0008] If the deviation of the voltage of a single cell of the stack from the mean is greater than or equal to an Nth voltage difference, the hydrogen fuel cell power generation system is continuously operated at the Nth current density until the deviation of the voltage of a single cell of the stack from the mean is less than the Nth voltage difference; the Nth voltage difference decreases as N increases;

[0009] If the deviation of the single cell voltage of the stack is less than the Nth voltage difference, the hydrogen fuel cell power generation system is maintained to operate at the Nth current density, and the temperature of the stack inlet is reduced by a preset temperature difference within a first preset time period, and then the system is operated for a second preset time period;

[0010] The current density of the hydrogen fuel cell power generation system is reduced to a preset current density;

[0011] If the value of N does not reach the preset cycle number K, N is updated to N+1, the starting current density is updated to the preset current density, and the step of loading the current density of the hydrogen fuel cell power generation system from the starting current density to the Nth current density at the Nth loading speed is returned to;

[0012] If the value of N reaches the preset cycle number K, the current density of the hydrogen fuel cell power generation system is loaded from the preset current density to the K+1th current density at the K+1th loading speed; the K+1th loading speed is greater than the Kth loading speed, and the K+1th current density is greater than the Kth current density;

[0013] When the temperature of the stack inlet reaches the K+1th temperature, the hydrogen fuel cell power generation system is operated at the K+1th current density for a K+1th time length; the K+1th temperature is greater than the Kth temperature;

[0014] If the deviation of the single cell voltage of the stack is less than the K+1th voltage difference, and the output power of the stack is greater than or equal to the rated power, it is determined that the activation of the stack is completed, and the hydrogen fuel cell power generation system enters a normal starting stage; the K+1th voltage difference is less than the Kth voltage difference;

[0015] If the deviation of the single cell voltage of the stack is greater than or equal to the K+1th voltage difference, or the output power of the stack is less than the rated power, the hydrogen fuel cell power generation system is continuously operated at the K+1th current density, and the operation time length is recorded until the deviation of the single cell voltage of the stack is less than a third voltage difference and the output power of the stack is greater than or equal to the rated power;

[0016] If the operation time length is less than or equal to a target time length, the hydrogen fuel cell power generation system enters the normal starting stage;

[0017] If the operation time length is greater than the target time length, it is determined that the activation of the stack fails, and a fault warning is issued. Optionally, K=2; the 1st current density is 0.5 A / cm 2 , the 2nd current density is 1.5 A / cm 2 , and the 3rd current density is 2 A / cm 2 .

[0018] Optionally, K=2; the 1st loading speed is increased by 0.1 A / cm 2 every 30 seconds, and the 2nd loading speed is increased by 0.1 A / cm 2The third loading speed is increased by 0.1A / cm every 10s. 2 .

[0019] Optionally, K=2; the first temperature is 60°C; the second temperature is 65°C; and the third temperature is 70°C.

[0020] Optionally, the preset temperature difference is 10° C., the first preset time period is 20 seconds, and the second preset time period is 30 seconds.

[0021] Optionally, K=2; the first voltage difference is 50 mV, the second voltage difference is 40 mV, and the third voltage difference is 30 mV.

[0022] Optionally, K=2; the first duration is 5 minutes, the second duration is 5 minutes, the third duration is 10 minutes, and the target duration is 20 minutes.

[0023] According to a second aspect of the present application, an activation control device for a hydrogen fuel cell power generation system is provided, comprising:

[0024] a first loading module, configured to load the current density of the hydrogen fuel cell power generation system from a starting current density to an Nth current density at an Nth loading speed when the hydrogen fuel cell power generation system is first started; an initial value of N is 1; an initial value of the starting current density is 0; and the Nth loading speed and the Nth current density increase as N increases;

[0025] a first operating module, configured to operate the hydrogen fuel cell power generation system at an Nth current density for an Nth time period after the temperature of the fuel cell stack inlet reaches an Nth temperature; the Nth temperature increases as N increases;

[0026] a continuous operation module, configured to, if the deviation of the voltage of a single cell of the stack from the mean is greater than or equal to an Nth voltage difference, continuously operate the hydrogen fuel cell power generation system at the Nth current density until the deviation of the voltage of a single cell of the stack from the mean is less than the Nth voltage difference; the Nth voltage difference decreases as N increases;

[0027] a cooling operation module, configured to maintain the hydrogen fuel cell power generation system at the Nth current density if the deviation of the voltage of the single cell of the stack is less than the Nth voltage difference, reduce the temperature of the stack inlet by a preset temperature difference within a first preset time period, and then operate for a second preset time period;

[0028] A current density reduction module, used to reduce the current density of the hydrogen fuel cell power generation system to a preset current density;

[0029] a cycle parameter updating module, configured to update N to N+1 and update the starting current density to the preset current density if the value of N does not reach the preset cycle number K, and return to the first ramping module to perform the step of ramping the current density of the hydrogen fuel cell power generation system from the starting current density to the Nth current density at the Nth ramping speed;

[0030] a second ramping module, configured to ramp the current density of the hydrogen fuel cell power generation system from the preset current density to the (K+1)th current density at the (K+1)th ramping speed if the value of N reaches the preset cycle number K; the (K+1)th ramping speed is greater than the Kth ramping speed, and the (K+1)th current density is greater than the Kth current density;

[0031] a second running module, configured to run the hydrogen fuel cell power generation system at the (K+1)th current density for a (K+1)th time length when the temperature of the stack inlet reaches a (K+1)th temperature; the (K+1)th temperature is greater than the Kth temperature;

[0032] a stack activation completion determining module, configured to determine that the stack activation is completed and the hydrogen fuel cell power generation system enters a normal starting stage if the deviation of the single-cell voltage of the stack is less than a (K+1)th voltage difference and the output power of the stack is greater than or equal to the rated power; the (K+1)th voltage difference is less than the Kth voltage difference;

[0033] a third running module, configured to continuously run the hydrogen fuel cell power generation system at the (K+1)th current density and record a running time length if the deviation of the single-cell voltage of the stack is greater than or equal to the (K+1)th voltage difference or the output power of the stack is less than the rated power, until the deviation of the single-cell voltage of the stack is less than a third voltage difference and the output power of the stack is greater than or equal to the rated power;

[0034] the stack activation completion determining module is further configured to cause the hydrogen fuel cell power generation system to enter the normal starting stage if the running time length is less than or equal to a target time length;

[0035] a stack activation failure determining module, configured to determine that the stack activation fails and issue a fault warning if the running time length is greater than the target time length.

[0036] Optionally, K=2; the 1st current density is 0.5 A / cm 2 , the 2nd current density is 1.5 A / cm 2 , and the 3rd current density is 2 A / cm 2 .

[0037] Optionally, K=2; the 1st temperature is 60℃; the 2nd temperature is 65℃; and the 3rd temperature is 70℃.

[0038] Optionally, K=2; the 1st ramping speed is 0.1 A / cm 2 increased every 30 s, and the 2nd ramping speed is 0.1 A / cm increased every 20 s.2 The third loading speed is increased by 0.1A / cm every 10s. 2 .

[0039] Optionally, the preset temperature difference is 10° C., the first preset time period is 20 seconds, and the second preset time period is 30 seconds.

[0040] Optionally, K=2; the first voltage difference is 50 mV, the second voltage difference is 40 mV, and the third voltage difference is 30 mV.

[0041] Optionally, K=2; the first duration is 5 minutes, the second duration is 5 minutes, the third duration is 10 minutes, and the target duration is 20 minutes.

[0042] According to a third aspect of the present application, an electronic device is provided, comprising: a processor, wherein the processor is configured to execute a computer program stored in a memory, wherein the computer program implements the method described in the first aspect when executed by the processor.

[0043] According to a fourth aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the method described in the first aspect is implemented.

[0044] According to a fifth aspect of the present application, a computer program product is provided. When the computer program product is run on a computer, the computer is caused to execute the method described in the first aspect.

[0045] The technical solution provided by the embodiments of the present application has the following advantages compared with the prior art:

[0046] The stack activation is completed through a variety of different loading current and temperature control methods, without the need for additional stack test bench equipment. During the first activation, since it is difficult for the stack to be loaded to a high current density, the hydrogen fuel cell power generation system can be operated at a low current density first. This can effectively avoid the situation where the stack is not activated or is incompletely activated and cannot be loaded to a high current density. Under constant current density operation, by rapidly reducing the temperature at the stack inlet, the humidity inside the stack reaches a supersaturated state, which can quickly increase the humidity inside the stack, accelerate the wetting of the stack catalyst layer and proton exchange membrane, and improve the activation efficiency. After the internal part of the stack is wetted, the current density is pulled to a high level, which can effectively protect the safe operation of the stack. Different deviations from the mean are used for judgment at different current densities to avoid shutdowns due to poor initial activation performance or large actual deviations from the mean, thereby ensuring the normal operation of the activation process and the thorough activation of the stack. Furthermore, higher temperatures are more conducive to the stack's performance. Before activation, the stack interior is relatively dry. If the temperature is too high, it will be difficult to fully wet the stack. Therefore, as the activation level increases, the stack inlet temperature can be gradually increased to improve stack performance. This activation process shortens the stack's activation time in the system and allows it to quickly reach rated output power. Furthermore, it reduces frequent voltage fluctuations during stack activation, which helps protect the stack's core components. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0048] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0049] Figure 1 A flow chart of an activation control method for a hydrogen fuel cell power generation system in an embodiment of the present application;

[0050] Figure 2 This is another flow chart of the activation control method of the hydrogen fuel cell power generation system in the embodiment of the present application;

[0051] Figure 3 This is a structural schematic diagram of an activation control device for a hydrogen fuel cell power generation system in an embodiment of the present application. DETAILED DESCRIPTION

[0052] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present application, not all of the embodiments.

[0054] See also Figure 1 , Figure 1 This is a flow chart of the activation control method of the hydrogen fuel cell power generation system in the embodiment of the present application. When the hydrogen fuel cell power generation system is started for the first time, the following steps can be performed:

[0055] Step S102 : increasing the current density of the hydrogen fuel cell power generation system from an initial current density to an Nth current density according to an Nth loading speed.

[0056] In the embodiments of the present application, stack activation is achieved through a variety of different loading current and temperature control methods. Because the corresponding processing procedures for different loading current and temperature control methods are the same, but the parameters such as the loading speed, loading current, and stack inlet temperature vary during the processing, stack activation can be achieved through a cyclic process. During the cyclic process, parameters such as the loading speed, loading current, and stack inlet temperature are varied.

[0057] The initial value of N is 1. During the first cycle, the corresponding parameters include: 1st loading speed, 1st current density, 1st temperature, 1st duration, and 1st voltage difference. The initial value of the starting current density is 0. During the cycling process, N gradually increases. For example, when N is 2, the second cycle is performed, and the corresponding parameters include: 2nd loading speed, 2nd current density, 2nd temperature, 2nd duration, and 2nd voltage difference. The starting current density is also updated, and so on.

[0058] During the first activation, it is difficult for the stack to be loaded to a high current density. Therefore, the first current density can be set to a smaller value, such as 0.5 A / cm 2 As the activation level increases, the fuel cell's performance improves, and the stack gradually reaches a better activation state, allowing for a gradual increase in current density. This means the Nth current density increases with increasing N. Similarly, the loading speed also increases with increasing activation level, with the Nth loading speed increasing with increasing N.

[0059] Step S104 : When the temperature of the fuel cell stack inlet reaches the Nth temperature, the hydrogen fuel cell power generation system is operated at the Nth current density for the Nth time period.

[0060] The higher the temperature, the better the stack performance. Before activation, the interior of the stack is relatively dry. If the temperature is too high, it is difficult to fully wet the stack. Therefore, as the degree of activation increases, the temperature at the stack inlet can be gradually increased. That is, the Nth temperature increases with the increase of N, to improve the performance of the stack. Operating the hydrogen fuel cell power generation system at a low current density can effectively avoid the situation where the stack cannot be loaded to a high current density due to incomplete or unactivated stack.

[0061] Step S106, determining whether the mean difference of the voltage of a single cell in the stack is less than the Nth voltage difference.

[0062] Since the activation performance is poor and the deviation from the mean is large in the early stages of activation, the first voltage difference can be set to a larger value to avoid being unable to continue the activation process. As the degree of activation increases, the voltage difference can be gradually reduced, that is, the Nth voltage difference decreases as N increases. If the deviation from the mean of the single-cell voltage of the stack is greater than or equal to the Nth voltage difference, it indicates that the stack has not reached a good activation state during this cycle, and step S108 is executed. If the deviation from the mean of the single-cell voltage of the stack is less than the Nth voltage difference, it indicates that the stack has reached a good activation state during this cycle, and step S110 is executed.

[0063] Step S108 , the hydrogen fuel cell power generation system continues to operate at the Nth current density, and the process returns to step S106 .

[0064] Step S110 , maintaining the hydrogen fuel cell power generation system to operate at the Nth current density, reducing the temperature of the fuel cell stack inlet by a preset temperature difference within a first preset time period, and then operating for a second preset time period.

[0065] Maintaining the hydrogen fuel cell power generation system at the Nth current density can generate a certain amount of water in the stack. After the current is running stably, by quickly reducing the temperature at the stack inlet, the inside of the stack can be supersaturated, the humidity inside the stack can be quickly increased, the wetting of the stack catalyst layer and the proton exchange membrane can be accelerated, and the activation efficiency can be improved. Optionally, the preset temperature difference can be 10°C, the first preset time period is 20s, and the second preset time period is 30s. That is, the temperature of the stack inlet is reduced by 10°C within 20 seconds and run for 30s. Optionally, the first temperature can be 60°C, then the temperature at the stack inlet is 50°C after reducing by 10°C.

[0066] Step S112: Reduce the current density of the hydrogen fuel cell power generation system to a preset current density. The preset current density may be, for example, 0.1 A / cm 2 wait.

[0067] Step S114, determining whether the value of N reaches a preset number of cycles K.

[0068] Steps S102-S112 are a one-cycle process of activation control, and the preset cycle number K is the number of the above cycle process set in advance. K can be 1, 2, 3, etc. Alternatively, when K is 2, the hydrogen fuel cell power generation system can be quickly activated and reach a better activation state. If the value of N does not reach the preset cycle number K, step S116 is executed, that is, N and the starting current density are updated, and the above cycle process is re-executed; if the value of N reaches the preset cycle number K, step S118 is executed.

[0069] In step S116, N is updated to N+1, the starting current density is updated to the preset current density, and step S102 is returned.

[0070] In step S118, the current density of the hydrogen fuel cell power generation system is pulled from the preset current density to the K+1 current density according to the K+1 pull speed.

[0071] As the activation degree increases, the performance of the fuel cell will be better, and the stack gradually reaches a better activation state, so the pull speed and the current density can be further increased. The K+1 pull speed is greater than the K pull speed, and the K+1 current density is greater than the K current density.

[0072] In step S120, when the temperature of the stack inlet reaches the K+1 temperature, the hydrogen fuel cell power generation system is operated at the K+1 current density for the K+1 time length.

[0073] Similarly, the temperature of the stack inlet can also be further increased, and the K+1 temperature is greater than the K temperature.

[0074] In step S122, it is determined whether the deviation of the single-cell voltage of the stack is less than the K+1 voltage difference, and whether the output power of the stack is greater than or equal to the rated power. The K+1 voltage difference is less than the K voltage difference.

[0075] If the deviation of the single-cell voltage of the stack is less than the K+1 voltage difference, and the output power of the stack is greater than or equal to the rated power, it indicates that the stack has reached a better activation state, and step S124 is executed; if the deviation of the single-cell voltage of the stack is greater than or equal to the K+1 voltage difference, or the output power of the stack is less than the rated power, it indicates that the stack has not reached a better activation state, and step S126 is executed.

[0076] In step S124, it is determined that the activation of the stack is completed, and the hydrogen fuel cell power generation system enters the normal starting phase.

[0077] In step S126, the hydrogen fuel cell power generation system is continuously operated at the K+1 current density, and the operation time length is recorded until the deviation of the single-cell voltage of the stack is less than the third voltage difference and the output power of the stack is greater than or equal to the rated power.

[0078] Step S128: Determine whether the running time is greater than the target time.

[0079] If the operating time is less than or equal to the target time, it means that the fuel cell stack can be activated to a better activation state in a shorter time, and step S124 is executed; if the operating time is greater than the target time, it means that the fuel cell stack needs a long time to be activated to a better activation state, and step S130 is executed.

[0080] Step S130: determining that the stack activation has failed and issuing a fault warning.

[0081] The activation control method of the hydrogen fuel cell power generation system of the embodiment of the present application completes the activation of the stack through a variety of different loading current and temperature control methods, and does not require additional stack test bench equipment. During the first activation, since it is difficult for the stack to be loaded to a high current density, the hydrogen fuel cell power generation system can be operated at a low current density first, which can effectively avoid the situation where the stack cannot be loaded to a high current density due to incomplete activation or unactivated performance. Under constant current density operation, by quickly lowering the temperature at the inlet of the stack, the humidity inside the stack reaches an oversaturated state, which can quickly increase the humidity inside the stack, accelerate the wetting of the catalyst layer and proton exchange membrane of the stack, and improve the activation efficiency. After the inside of the stack is wetted, it is loaded to a high current density, which can effectively protect the safe operation of the stack. Different deviations from the mean are used for judgment at different current densities to avoid shutdowns due to poor initial activation performance and large actual deviations from the mean, thereby ensuring the normal operation of the activation program and the thorough activation of the stack. Furthermore, higher temperatures are more conducive to the stack's performance. Before activation, the stack interior is relatively dry. If the temperature is too high, it will be difficult to fully wet the stack. Therefore, as the activation level increases, the stack inlet temperature can be gradually increased to improve stack performance. This activation process shortens the stack's activation time in the system and allows it to quickly reach rated output power. Furthermore, it reduces frequent voltage fluctuations during stack activation, which helps protect the stack's core components.

[0082] See also Figure 2 , Figure 2 This is another flow chart of the activation control method of the hydrogen fuel cell power generation system in the embodiment of the present application, that is, when K=2, the flow chart of the activation control method of the hydrogen fuel cell power generation system may include the following steps:

[0083] Step S202 : When the hydrogen fuel cell power generation system is started for the first time, the current density of the hydrogen fuel cell power generation system is increased from the initial current density to the first current density according to the first loading speed.

[0084] Optionally, the first loading speed is increased by 0.1A / cm every 30s. 2 , the first current density is 0.5A / cm 2 .

[0085] Step S204 : When the temperature at the fuel cell stack inlet reaches a first temperature, the hydrogen fuel cell power generation system is operated at a first current density for a first time period.

[0086] Optionally, the first temperature is 60° C. and the first time duration is 5 minutes.

[0087] Step S206, determining whether the mean difference of the voltage of a single cell of the stack is less than the first voltage difference.

[0088] Optionally, the first voltage difference is 50 mV.

[0089] In step S208 , the hydrogen fuel cell power generation system continues to operate at the first current density, and the process returns to step S206 .

[0090] In step S210 , the hydrogen fuel cell power generation system is maintained to operate at a first current density, the temperature of the fuel cell stack inlet is reduced by a preset temperature difference within a first preset time period, and then operated for a second preset time period.

[0091] For example, the temperature of the stack inlet is reduced by 10°C within 20 seconds to 50°C, and the temperature is run for 30 seconds.

[0092] Step S212: reducing the current density of the hydrogen fuel cell power generation system to a preset current density.

[0093] In step S214 , the current density of the hydrogen fuel cell power generation system is increased from the initial current density to the second current density according to the second loading speed.

[0094] Optionally, the second loading speed is increased by 0.1A / cm every 20s. 2 , the second current density is 1.5A / cm 2 .

[0095] Step S216: When the temperature at the fuel cell stack inlet reaches the second temperature, the hydrogen fuel cell power generation system is operated at the second current density for a second period of time.

[0096] Optionally, the second temperature is 65° C. and the second time duration is 5 minutes.

[0097] Step S218: Determine whether the mean deviation of the voltage of the battery stack cell is less than a second voltage difference. The second voltage difference is less than the first voltage. Optionally, the second voltage difference is 40 mV.

[0098] In step S220 , the hydrogen fuel cell power generation system continues to operate at the second current density, and the process returns to step S218 .

[0099] Step S222, the hydrogen fuel cell power generation system is maintained to operate at the second current density, and the temperature of the stack inlet is reduced by a preset temperature difference within a first preset time period, and then operates for a second preset time period.

[0100] For example, the temperature of the stack inlet is reduced by 10℃ within 20s, the temperature of the stack inlet is 55℃, and the system operates for 30s.

[0101] Step S224, the current density of the hydrogen fuel cell power generation system is reduced to a preset current density.

[0102] Step S226, the current density of the hydrogen fuel cell power generation system is loaded from the preset current density to the third current density at a third loading speed.

[0103] Optionally, the third loading speed is increased by 0.1A / cm 2 every 10s, and the third current density is 2A / cm 2 .

[0104] Step S228, when the temperature of the stack inlet reaches a third temperature, the hydrogen fuel cell power generation system operates at the third current density for a third time length.

[0105] Optionally, the third temperature is 70℃, and the third time length is 10min.

[0106] Step S230, it is judged whether the deviation of the single-cell voltage of the stack is less than a third voltage difference, and whether the output power of the stack is greater than or equal to the rated power.

[0107] The third voltage difference is less than the second voltage difference, and optionally, the third voltage difference is 30mV. If the deviation of the single-cell voltage of the stack is less than the third voltage difference, and the output power of the stack is greater than or equal to the rated power, it indicates that the stack has reached a better activation state, and step S232 is executed; if the deviation of the single-cell voltage of the stack is greater than or equal to the third voltage difference, or the output power of the stack is less than the rated power, it indicates that the stack has not reached a better activation state, and step S234 is executed.

[0108] Step S232, it is determined that the activation of the stack is completed, and the hydrogen fuel cell power generation system enters a normal starting phase.

[0109] Step S234, the hydrogen fuel cell power generation system is continuously operated at the K+1 current density, and the operation time is recorded until the deviation of the single-cell voltage of the stack is less than the third voltage difference and the output power of the stack is greater than or equal to the rated power.

[0110] Step S236, it is judged whether the operation time is greater than a target time length.

[0111] Optionally, the target duration is 20 minutes. If the operating time is less than or equal to the target duration, it indicates that the stack can be activated to a better state in a shorter time, and step S232 is executed. If the operating time is greater than the target duration, it indicates that the stack will take a long time to be activated to a better state, and step S238 is executed.

[0112] Step S238: Determine that the stack activation has failed and issue a fault warning.

[0113] The activation control method of the hydrogen fuel cell power generation system of the embodiment of the present application completes the activation of the fuel cell stack through three different loading current and temperature control methods, and can use a shorter time to enable the fuel cell stack to reach a better activation state.

[0114] It should be noted that although the steps of the method of the present application are described in a specific order in the drawings, this does not require or imply that the steps must be performed in this specific order, or that all steps 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.

[0115] The present application also provides an activation control device for a hydrogen fuel cell power generation system. Figure 3 The activation control device 300 of the hydrogen fuel cell power generation system includes:

[0116] The first loading module 302 is configured to load the current density of the hydrogen fuel cell power generation system from a starting current density to an Nth current density according to an Nth loading speed when the hydrogen fuel cell power generation system is first started; the initial value of N is 1; the initial value of the starting current density is 0; and the Nth loading speed and the Nth current density increase as N increases;

[0117] The first operation module 304 is configured to operate the hydrogen fuel cell power generation system at an Nth current density for an Nth time period after the temperature of the fuel cell stack inlet reaches an Nth temperature; the Nth temperature increases as N increases;

[0118] The continuous operation module 306 is configured to continuously operate the hydrogen fuel cell power generation system at an Nth current density if the deviation of the voltage of the stack cell from the mean is greater than or equal to an Nth voltage difference, until the deviation of the voltage of the stack cell from the mean is less than the Nth voltage difference; the Nth voltage difference decreases as N increases;

[0119] A temperature reduction operation module 308 is configured to maintain the hydrogen fuel cell power generation system at an Nth current density if the deviation of the voltage of the fuel cell stack from the mean is less than an Nth voltage difference, reduce the temperature of the fuel cell stack inlet by a preset temperature difference within a first preset time period, and then operate for a second preset time period;

[0120] The current density reduction module 310 is used to reduce the current density of the hydrogen fuel cell power generation system to a preset current density;

[0121] The cycle parameter updating module 312 is configured to update N to N+1 and the starting current density to the preset current density if the value of N does not reach the preset cycle number K, and return to the first loading module 302 to execute the step of increasing the current density of the hydrogen fuel cell power generation system from the starting current density to the Nth current density according to the Nth loading speed;

[0122] The second loading module 314 is configured to increase the current density of the hydrogen fuel cell power generation system from a preset current density to a K+1th current density at a K+1th loading speed if the value of N reaches a preset number of cycles K; the K+1th loading speed is greater than the Kth loading speed, and the K+1th current density is greater than the Kth current density;

[0123] The second operation module 316 is configured to operate the hydrogen fuel cell power generation system at a K+1th current density for a K+1th time period after the temperature at the fuel cell stack inlet reaches a K+1th temperature; the K+1th temperature is greater than the Kth temperature;

[0124] The stack activation completion determination module 318 is configured to determine that stack activation is complete and the hydrogen fuel cell power generation system enters a normal startup phase if the deviation of the stack cell voltage from the mean is less than the K+1th voltage difference and the stack output power is greater than or equal to the rated power; and the K+1th voltage difference is less than the Kth voltage difference;

[0125] The third operation module 320 is configured to, if the deviation from the mean of the voltage of a single cell of the stack is greater than or equal to the K+1th voltage difference, or the output power of the stack is less than the rated power, continue to operate the hydrogen fuel cell power generation system at the K+1th current density, and record the operation time until the deviation from the mean of the voltage of a single cell of the stack is less than the third voltage difference and the output power of the stack is greater than or equal to the rated power;

[0126] The stack activation completion determination module 318 is further configured to cause the hydrogen fuel cell power generation system to enter a normal startup phase if the operating time is less than or equal to the target time;

[0127] The stack activation failure determination module 322 is configured to determine that the stack activation has failed and issue a fault warning if the operating time is greater than the target time.

[0128] Optionally, K=2; the first current density is 0.5A / cm 2 , the second current density is 1.5Acm 2 , the third current density is 2A / cm 2 .

[0129] Optionally, K=2; the first temperature is 60°C; the second temperature is 65°C; and the third temperature is 70°C.

[0130] Optionally, K=2; the first loading speed increases by 0.1A / cm every 30s. 2 The second loading speed increases by 0.1A / cm every 20s. 2 The third loading speed is increased by 0.1A / cm every 10s. 2 .

[0131] Optionally, the preset temperature difference is 10° C., the first preset time period is 20 seconds, and the second preset time period is 30 seconds.

[0132] Optionally, K=2; the first voltage difference is 50 mV, the second voltage difference is 40 mV, and the third voltage difference is 30 mV.

[0133] Optionally, K=2; the first duration is 5 minutes, the second duration is 5 minutes, the third duration is 10 minutes, and the target duration is 20 minutes.

[0134] The specific details of each module or unit in the above device have been described in detail in the corresponding method, so they will not be repeated here.

[0135] It should be noted that, although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiment of the application, the features and functions of two or more modules or units described above can be concretized in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into multiple modules or units to be concretized.

[0136] An embodiment of the present application also provides an electronic device, comprising: a processor; and a memory for storing instructions executable by the processor; wherein the processor is configured to execute the activation control method of the hydrogen fuel cell power generation system described above in this example embodiment.

[0137] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the activation control method of the above-mentioned hydrogen fuel cell power generation system.

[0138] It should be noted that the computer-readable storage medium shown in this application can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination thereof. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, device or device. The program code contained on the computer-readable storage medium can be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, radio frequency, etc., or any suitable combination thereof.

[0139] An embodiment of the present application also provides a computer program product, which, when executed on a computer, enables the computer to execute the activation control method for the above-mentioned hydrogen fuel cell power generation system.

[0140] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0141] The foregoing description is intended only to provide specific embodiments of the present application, which will enable those skilled in the art to understand and implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments described herein, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. An activation control method for a hydrogen fuel cell power generation system, characterized in that: include: When the hydrogen fuel cell power generation system is first started, the current density of the hydrogen fuel cell power generation system is increased from the starting current density to the Nth current density according to the Nth loading speed; the initial value of N is 1; the initial value of the starting current density is 0; the Nth loading speed and the Nth current density increase as N increases; When the temperature of the fuel cell stack inlet reaches an Nth temperature, the hydrogen fuel cell power generation system is operated at the Nth current density for an Nth time period; the Nth temperature increases as N increases; If the deviation of the voltage of a single cell of the stack from the mean is greater than or equal to an Nth voltage difference, the hydrogen fuel cell power generation system is continuously operated at the Nth current density until the deviation of the voltage of a single cell of the stack from the mean is less than the Nth voltage difference; the Nth voltage difference decreases as N increases; If the deviation of the voltage of the single cell of the stack from the mean is less than the Nth voltage difference, the hydrogen fuel cell power generation system is maintained at the Nth current density, the temperature of the stack inlet is reduced by a preset temperature difference within the first preset time period, and the system is operated for a second preset time period; reducing the current density of the hydrogen fuel cell power generation system to a preset current density; If the value of N does not reach the preset number of cycles K, N is updated to N+1, the starting current density is updated to the preset current density, and the process returns to the step of increasing the current density of the hydrogen fuel cell power generation system from the starting current density to the Nth current density at the Nth loading speed; If the value of N reaches a preset number of cycles K, the current density of the hydrogen fuel cell power generation system is increased from the preset current density to the K+1th current density according to the K+1th loading speed; the K+1th loading speed is greater than the Kth loading speed, and the K+1th current density is greater than the Kth current density; When the temperature at the fuel cell stack inlet reaches the K+1th temperature, the hydrogen fuel cell power generation system is operated at the K+1th current density for the K+1th time; the K+1th temperature is greater than the Kth temperature; If the deviation of the voltage of the single cell of the stack from the mean is less than the K+1 voltage difference, and the output power of the stack is greater than or equal to the rated power, it is determined that the stack activation is complete and the hydrogen fuel cell power generation system enters the normal startup phase; the K+1 voltage difference is less than the K voltage difference; If the mean deviation of the voltage of a single cell in the stack is greater than or equal to the K+1th voltage difference, or the output power of the stack is less than the rated power, the hydrogen fuel cell power generation system shall continue to operate at the K+1th current density and record the operating time until the mean deviation of the voltage of a single cell in the stack is less than the third voltage difference and the output power of the stack is greater than or equal to the rated power; If the operating time is less than or equal to the target time, the hydrogen fuel cell power generation system enters the normal startup phase; If the operating time is longer than the target time, it is determined that the stack activation has failed and a fault warning is issued.

2. The method according to claim 1, characterized in that K = 2; the first current density is 0.5 A / cm 2 , the second current density is 1.5A / cm 2 , the third current density is 2A / cm 2 .

3. The method according to claim 1, characterized in that K=2; the first temperature is 60°C; the second temperature is 65°C; and the third temperature is 70°C.

4. The method according to claim 1, wherein K = 2; the first loading speed increases by 0.1 A / cm every 30 seconds 2 The second loading speed increases by 0.1A / cm every 20s. 2 The third loading speed is increased by 0.1A / cm every 10s. 2 .

5. The method according to claim 1, wherein K=2; the first voltage difference is 50 mV, the second voltage difference is 40 mV, and the third voltage difference is 30 mV.

6. The method according to claim 3, characterized in that The preset temperature difference is 10° C., the first preset time period is 20 seconds, and the second preset time period is 30 seconds.

7. The method according to claim 1, characterized in that K=2; the first duration is 5 minutes, the second duration is 5 minutes, the third duration is 10 minutes, and the target duration is 20 minutes.

8. An activation control device for a hydrogen fuel cell power generation system, characterized in that: The device comprises: a first loading module, configured to load the current density of the hydrogen fuel cell power generation system from a starting current density to an Nth current density at an Nth loading speed when the hydrogen fuel cell power generation system is first started; an initial value of N is 1; an initial value of the starting current density is 0; and the Nth loading speed and the Nth current density increase as N increases; a first operating module, configured to operate the hydrogen fuel cell power generation system at an Nth current density for an Nth time period after the temperature of the fuel cell stack inlet reaches an Nth temperature; the Nth temperature increases as N increases; a continuous operation module, configured to, if the deviation of the voltage of a single cell of the stack from the mean is greater than or equal to an Nth voltage difference, continuously operate the hydrogen fuel cell power generation system at the Nth current density until the deviation of the voltage of a single cell of the stack from the mean is less than the Nth voltage difference; the Nth voltage difference decreases as N increases; a cooling operation module, configured to maintain the hydrogen fuel cell power generation system at the Nth current density if the deviation of the voltage of the single cell of the stack is less than the Nth voltage difference, reduce the temperature of the stack inlet by a preset temperature difference within a first preset time period, and then operate for a second preset time period; A current density reduction module, used to reduce the current density of the hydrogen fuel cell power generation system to a preset current density; a cycle parameter updating module, configured to update N to N+1 and the starting current density to the preset current density if the value of N does not reach the preset cycle number K, and return to the first loading module to execute the step of increasing the current density of the hydrogen fuel cell power generation system from the starting current density to the Nth current density at the Nth loading speed; a second loading module, configured to increase the current density of the hydrogen fuel cell power generation system from a preset current density to a K+1th current density at a K+1th loading speed if the value of N reaches a preset number of cycles K; the K+1th loading speed being greater than the Kth loading speed, and the K+1th current density being greater than the Kth current density; The second operation module is configured to operate the hydrogen fuel cell power generation system at a K+1th current density for a K+1th time period after the temperature at the fuel cell stack inlet reaches a K+1th temperature; the K+1th temperature is greater than the Kth temperature; The stack activation completion determination module is used to determine that the stack activation is completed and the hydrogen fuel cell power generation system enters the normal startup phase if the deviation of the voltage of the single chip of the stack from the mean is less than the K+1 voltage difference and the output power of the stack is greater than or equal to the rated power; the K+1 voltage difference is less than the K voltage difference; a third operating module, configured to, if the deviation from the mean of the voltage of a single cell of the stack is greater than or equal to a K+1th voltage difference, or the output power of the stack is less than the rated power, continue to operate the hydrogen fuel cell power generation system at the K+1th current density, and record the operating time until the deviation from the mean of the voltage of a single cell of the stack is less than a third voltage difference and the output power of the stack is greater than or equal to the rated power; The stack activation completion determination module is further configured to cause the hydrogen fuel cell power generation system to enter a normal startup phase if the operating time is less than or equal to the target time; The stack activation failure determination module is used to determine that the stack activation has failed and issue a fault warning if the operating time is greater than the target time.

9. The device according to claim 8, characterized in that K = 2; the first current density is 0.5 A / cm 2 , the second current density is 1.5A / cm 2 , the third current density is 2A / cm 2 .

10. The device according to claim 8, characterized in that K=2; the first temperature is 60°C; the second temperature is 65°C; and the third temperature is 70°C.

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