Activation control method and device of hydrogen fuel cell power generation system

Abstract

The invention relates to an activation control method and device of a hydrogen fuel cell power generation system, which are applied to the technical field of fuel cells, and the method comprises the following steps: pulling and loading the current density from the initial current density to the Nth current density when starting for the first time; when the temperature of the inlet of the electric pile reaches the Nth temperature, running for at least the Nth duration under the Nth current density, so that the average difference of the voltage of the single electric pile is smaller than the Nth voltage difference; reducing the temperature of the pile inlet and operating for a second preset time period; reducing the current density to a preset current density; and if N does not reach K, updating N to N + 1, updating the initial current density to the preset current density, and returning to load from the initial current density to the Nth current density. If N reaches K, the current density is loaded to a large current density; when the temperature of the galvanic pile inlet reaches a relatively high temperature, running for the (K + 1) th duration; and if the average difference is smaller than the smaller voltage difference and the output power is greater than or equal to the rated power, determining that the galvanic pile activation is completed. And rapid activation of the galvanic pile can be realized.

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, as an advanced power generation technology that can directly convert the chemical energy of hydrogen into electrical energy, has gradually become a research and development hotspot in the global energy technology field and an important direction for future energy development due to its pollution-free emissions, high energy conversion efficiency and flexible application potential. Before the normal operation of the hydrogen fuel cell power generation system, the stack needs to be activated to activate the performance of the membrane electrode in the stack and achieve higher performance output of the stack.

[0003] In the related art, the hydrogen fuel cell power generation system can be directly used to activate the stack. That is, in the early stage of the operation of the hydrogen fuel cell power generation system, the stack is usually activated by repeatedly loading the hydrogen fuel cell power generation system and running it for a long time under high current, so that the stack can achieve qualified output performance. However, this method is difficult to ensure the humidity inside the stack and requires a longer activation time. In addition, frequent load changes are required, which affects the service life of the core materials of the stack. 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 started for the first time, the current density of the hydrogen fuel cell power generation system is loaded 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 at the inlet of the fuel cell stack 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 the 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 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 to operate 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;

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

[0011] 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 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;

[0012] If the value of N reaches the 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;

[0013] When the temperature at the inlet of the fuel cell stack 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;

[0014] If the deviation of the voltage of a single cell of the stack from the mean 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 stack activation is complete, and the hydrogen fuel cell power generation system enters the normal startup phase; the K+1th voltage difference is less than the Kth voltage difference;

[0015] If the deviation of the voltage of a single cell of the stack from the mean 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 will continue to operate at the K+1th current density, and the operating time will be recorded until the deviation of the voltage of a single cell of the stack from the mean is less than the third voltage difference and the output power of the stack is greater than or equal to the rated power;

[0016] 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;

[0017] If the running time is longer than the target time, it is determined that the stack activation has failed and a fault warning is issued. Optionally, 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 .

[0018] Optionally, 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. 2The third loading speed increases 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, there is provided an activation control device for a hydrogen fuel cell power generation system, comprising:

[0024] A first loading module is used for loading 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 started for the first time; 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;

[0025] A first operation module is used to operate the hydrogen fuel cell power generation system at the 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, for, if the deviation of the voltage of a single cell of the stack from the mean is greater than or equal to the Nth voltage difference, continuously operating 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 is used 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 inlet of the stack by a preset temperature difference within a first preset time period, and 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, update the starting current density to the preset current density, and return to the first loading module to execute 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 if the value of N does not reach the preset cycle number K;

[0030] The second loading module is used to load the current density of the hydrogen fuel cell power generation system from a preset current density to a K+1th current density according to 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;

[0031] The second operation module is used to operate the hydrogen fuel cell power generation system for the K+1th time at the K+1th current density after the temperature of the fuel cell stack inlet reaches the K+1th temperature; the K+1th temperature is greater than the Kth temperature;

[0032] 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;

[0033] The third operation module is used to operate the hydrogen fuel cell power generation system at the K+1th current density if the deviation of the voltage of the 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, and record the operation time until the deviation of the voltage of the 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;

[0034] The stack activation completion determination module is also used for 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;

[0035] 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.

[0036] Optionally, K=2; the first current density is 0.5A / cm 2 , the second current density is 1.5A / cm 2 , the third current density is 2A / cm 2 .

[0037] Optionally, K=2; the first temperature is 60°C; the second temperature is 65°C; and the third temperature is 70°C.

[0038] Optionally, 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 increases 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 enabled to execute the method described in the first aspect.

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

[0046] The activation of the stack is completed through a variety of different loading current and temperature control methods, and there is no need to add 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 inactivation. Under constant current density operation, by quickly reducing 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. In addition, the higher the temperature, the more conducive it is to the performance of the stack. The inside of the stack is relatively dry when not activated. If the temperature is too high, it is difficult to completely wet the stack. Therefore, as the degree of activation increases, the temperature at the inlet of the stack can be gradually increased to improve the performance of the stack. Through the above activation process, the activation time of the stack in the system can be shortened and the rated output power can be quickly reached. In addition, the frequent changes in voltage during the stack activation process are reduced, which is conducive to protecting the core components of the stack. 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[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 It 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 purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than 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, loading the current density of the hydrogen fuel cell power generation system from the initial current density to the Nth current density according to the Nth loading speed.

[0056] In the embodiment of the present application, activation of the stack is completed by a variety of different loading current and temperature control methods. Since the processing process corresponding to different loading current and temperature control methods is the same, the parameters such as the loading speed, loading current and the temperature of the stack inlet during the processing are different. Therefore, activation of the stack can be achieved by executing a cycle process. During the cycle, the parameters such as the loading speed, loading current and the temperature of the stack inlet are changed.

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

[0058] During the first activation, since it is difficult for the battery stack to be loaded with a high current density, the first current density can be set to a smaller value, such as 0.5 A / cm 2 As the activation degree increases, the performance of the fuel cell will improve, the stack gradually reaches a better activation state, and the current density can be gradually increased, that is, the Nth current density increases with the increase of N. Similarly, the loading speed can also be increased with the increase of the activation degree, and the Nth loading speed increases with the increase of 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 performance of the stack. The inside of the stack is relatively dry when not activated. If the temperature is too high, it is difficult to completely wet the stack. Therefore, as the degree of activation increases, the temperature at the inlet of the stack can be gradually increased, that is, the Nth temperature increases with the increase of N, so as 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 activation.

[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 initial stage of activation, the first voltage difference can be set to a larger value to avoid being unable to continue the activation procedure. 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 voltage of a single cell in the stack is greater than or equal to the Nth voltage difference, it means that the stack has not reached a better activation state during this cycle, and step S108 is executed; if the deviation from the mean of the voltage of a single cell in the stack is less than the Nth voltage difference, it means that the stack has reached a better activation state during this cycle, and step S110 is executed.

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

[0064] Step S110, maintaining the hydrogen fuel cell power generation system 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 runs stably, by quickly reducing the temperature at the inlet of the stack, the inside of the stack can be supersaturated, the humidity inside the stack can be quickly increased, the wetting of the catalyst layer and the proton exchange membrane of the stack 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 at the inlet of the stack 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 inlet of the stack 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 to S112 are a cycle of activation control, and the preset number of cycles K is the number of the above cycle process set in advance. K can be 1, 2, 3, etc. Optionally, 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 number of cycles K, execute step S116, that is, update N and the starting current density and re-execute the above cycle process; if the value of N reaches the preset number of cycles K, execute step S118.

[0069] Step S116, update N to N+1, update the starting current density to the preset current density, and return to step S102.

[0070] Step S118, loading the current density of the hydrogen fuel cell power generation system from a preset current density to a K+1th current density according to a K+1th loading speed.

[0071] As the degree of activation increases, the performance of the fuel cell will improve, and the stack will gradually reach a better activation state. The loading speed and current density can be further increased. 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.

[0072] Step S120, when the temperature of 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 period.

[0073] Similarly, the temperature at the inlet of the fuel cell stack may be further increased, and the K+1th temperature may be greater than the Kth temperature.

[0074] Step S122, judging whether the deviation of the voltage of the single cell of the stack is less than the K+1th voltage difference, and whether the output power of the stack is greater than or equal to the rated power. The K+1th voltage difference is less than the Kth voltage difference.

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

[0076] Step S124, determining that the activation of the fuel cell stack is complete, and the hydrogen fuel cell power generation system enters the normal startup phase.

[0077] Step S126, continue to operate the hydrogen fuel cell power generation system at the K+1th current density and record the operating time until the deviation of the voltage of the 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.

[0078] Step S128, determining 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 battery 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 battery 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 inactivation. Under the constant current density operation condition, by quickly reducing the temperature of the stack inlet, the humidity inside the stack reaches an oversaturated state, 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. After the internal part 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. In addition, the higher the temperature, the more conducive it is to the performance of the stack. The inside of the stack is relatively dry when not activated. If the temperature is too high, it is difficult to completely wet the stack. Therefore, as the degree of activation increases, the temperature at the inlet of the stack can be gradually increased to improve the performance of the stack. Through the above activation process, the activation time of the stack in the system can be shortened and the rated output power can be quickly reached. In addition, the frequent changes in voltage during the stack activation process are reduced, which is conducive to protecting the core components of the stack.

[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 loaded 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 inlet of the fuel cell stack reaches the first temperature, the hydrogen fuel cell power generation system is operated at the first current density for the 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 deviation 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] Step S210, maintaining the hydrogen fuel cell power generation system at a first 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.

[0091] For example, the temperature of the stack inlet is reduced by 10°C within 20 seconds, so that the temperature of the stack inlet is 50°C, and it 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] Step S214, increasing the current density of the hydrogen fuel cell power generation system 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 inlet of the fuel cell stack 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, determining whether the deviation of the voltage of the battery stack cell is less than the 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, maintaining the hydrogen fuel cell power generation system at the second current density, reducing the temperature of the fuel cell stack inlet by a preset temperature difference within the first preset time period, and then operating for a second preset time period.

[0100] For example, the temperature of the stack inlet is reduced by 10°C within 20 seconds, so that the temperature of the stack inlet is 55°C, and it is run for 30 seconds.

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

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

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

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

[0105] Optionally, the third temperature is 70° C., and the third time duration is 10 min.

[0106] Step S230, determining whether the deviation of the voltage of a single cell of the stack is less than the 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, and optionally, the third voltage difference is 30mV. If the mean difference of the voltage of the single chip 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 means that the stack has reached a better activation state, and step S232 is executed; if the mean difference of the voltage of the single chip 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 means that the stack has not reached a better activation state, and step S234 is executed.

[0108] Step S232, determine that the activation of the fuel cell stack is completed, and the hydrogen fuel cell power generation system enters the normal startup stage.

[0109] Step S234, continuously operate the hydrogen fuel cell power generation system at the K+1th current density and record the operation time until the deviation of the voltage of the 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.

[0110] Step S236, determining whether the running time is greater than the target time.

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

[0112] Step S238, determining that the stack activation has failed, and issuing 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 make the fuel cell stack reach a better activation state.

[0114] It should be noted that although the steps of the method in 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 the steps 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, etc.

[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 used to load 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 when the hydrogen fuel cell power generation system is started for the first time; 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;

[0117] The first operation module 304 is used 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 used to operate the hydrogen fuel cell power generation system continuously at the Nth current density if the deviation of the voltage of the single cell of the stack is greater than or equal to the Nth voltage difference, until the deviation of the voltage of the single cell of the stack is less than the Nth voltage difference; the Nth voltage difference decreases as N increases;

[0119] The temperature reduction operation module 308 is used 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 inlet of the stack by a preset temperature difference within a first preset time period, and 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 used to update N to N+1 if the value of N does not reach the preset cycle number K, update the starting current density to the preset current density, and return to the first loading module 302 to execute 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 according to the Nth loading speed;

[0122] The second loading module 314 is used to load the current density of the hydrogen fuel cell power generation system from a preset current density to a K+1th current density according to 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 used to operate the hydrogen fuel cell power generation system for a K+1th time at a K+1th current density 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 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;

[0125] The third operation module 320 is used to operate the hydrogen fuel cell power generation system at the K+1th current density if the deviation of the voltage of the 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, and record the operation time until the deviation of the voltage of the 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 also used to, if the operation time is less than or equal to the target time, the hydrogen fuel cell power generation system enters the normal startup phase;

[0127] The stack activation failure determination module 322 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.

[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 0.1 A / cm every 30 seconds 2 The second loading speed increases by 0.1A / cm every 20s. 2 The third loading speed increases 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 equipment for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into being embodied by multiple modules or units.

[0136] An embodiment of the present application also provides an electronic device, comprising: a processor; 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 also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the activation control method of the above-mentioned hydrogen fuel cell power generation system is implemented.

[0138] It should be noted that the computer-readable storage medium shown in the present application may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may 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 of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, radio frequency, etc., or any suitable combination of the above.

[0139] The embodiment of the present application also provides a computer program product. When the computer program product is run on a computer, the computer executes the activation control method of the above-mentioned hydrogen fuel cell power generation system.

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

[0141] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope 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 started for the first time, the current density of the hydrogen fuel cell power generation system is loaded 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 at the inlet of the fuel cell stack 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 the 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 to operate 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 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; If the value of N reaches the 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 inlet of the fuel cell stack 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 a single cell of the stack from the mean 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 stack activation is complete, and the hydrogen fuel cell power generation system enters the normal startup phase; the K+1th voltage difference is less than the Kth voltage difference; If the deviation of the voltage of a single cell of the stack from the mean 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 will continue to operate at the K+1th current density, and the operating time will be recorded until the deviation of the voltage of a single cell of the stack from the mean 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 0.5A / 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; the third temperature is 70°C.

4. The method according to claim 1, characterized in that: 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 increases by 0.1A / cm every 10s. 2 .

5. The method according to claim 1, characterized in that 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 is used for loading 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 started for the first time; 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; A first operation module is used to operate the hydrogen fuel cell power generation system at the 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, for, if the deviation of the voltage of a single cell of the stack from the mean is greater than or equal to the Nth voltage difference, continuously operating 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 is used 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 inlet of the stack by a preset temperature difference within a first preset time period, and 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, update the starting current density to the preset current density, and return to the first loading module to execute 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 if the value of N does not reach the preset cycle number K; The second loading module is used to load the current density of the hydrogen fuel cell power generation system from a preset current density to a K+1th current density according to 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; The second operation module is used to operate the hydrogen fuel cell power generation system for the K+1th time at the K+1th current density after the temperature of the fuel cell stack inlet reaches the 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; The third operation module is used to operate the hydrogen fuel cell power generation system at the K+1th current density if the deviation of the voltage of the 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, and record the operation time until the deviation of the voltage of the 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; The stack activation completion determination module is also used for 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 0.5A / 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; the third temperature is 70°C.

Images