Fuel cell stack activation system

Abstract

The application discloses a fuel cell stack activation system, comprising: an ultrasonic atomizer, which is used for atomizing liquid water into water particles; and a vortex mixing cavity, one end of which is connected with the ultrasonic atomizer, and the other end of which is connected with a cathode inlet of a fuel cell stack, so that the water particles atomized by the ultrasonic atomizer and the gas are mixed and then enter the fuel cell stack. The fuel cell stack activation system can quickly generate water mist, has a short response time, improves the membrane electrode hydration efficiency, and improves the fuel cell stack activation efficiency.

Description

Technical Field

[0001] This application relates to the field of fuel cell stack technology, and in particular to a fuel cell stack activation system. Background Technology

[0002] As a key energy conversion technology for hydrogen energy, the performance of fuel cells largely depends on the state regulation of the membrane electrode assembly (MEA) during the initial activation stage. Fuel cell stack activation refers to a crucial process during initial startup, where specific temperature and humidity conditions and current loading are used to bring the MEA to its optimal operating state. Insufficient activation will lead to the following problems: insufficient water absorption by the membrane resulting in low proton conduction efficiency; uneven gas distribution causing concentration of electrochemically active areas; and sudden current loading causing damage to the catalyst layer structure, even forming pinholes. Utility Model Content

[0003] This application aims to at least partially solve one of the technical problems in the related art. To this end, this application proposes a fuel cell stack activation system, in which an ultrasonic atomizer is used to atomize liquid water into water particles, one end of a vortex mixing chamber is connected to the ultrasonic atomizer, and the other end of the vortex mixing chamber is connected to the cathode inlet of the fuel cell stack, so that the water particles atomized by the ultrasonic atomizer are mixed with the gas and then enter the fuel cell stack, thereby enabling rapid generation of water mist, short response time, improved membrane electrode hydration efficiency, and enhanced fuel cell stack activation efficiency.

[0004] To achieve the above objectives, this application proposes a fuel cell stack activation system, comprising: an ultrasonic atomizer, wherein the ultrasonic atomizer is used to atomize liquid water into a water particle vortex mixing chamber, one end of the vortex mixing chamber is connected to the ultrasonic atomizer, and the other end of the vortex mixing chamber is connected to the cathode inlet of the fuel cell stack, so that the water particles atomized by the ultrasonic atomizer are mixed with gas and then enter the fuel cell stack.

[0005] According to the fuel cell stack activation system of this application, an ultrasonic atomizer is used to atomize liquid water into water particles. One end of the vortex mixing chamber is connected to the ultrasonic atomizer, and the other end of the vortex mixing chamber is connected to the cathode inlet of the fuel cell stack, so that the water particles atomized by the ultrasonic atomizer are mixed with the gas and then enter the fuel cell stack, thereby enabling rapid generation of water mist, short response time, and improved membrane electrode hydration efficiency, thereby improving the activation efficiency of the fuel cell stack.

[0006] In addition, the fuel cell stack activation system described above according to this application may also have the following additional technical features:

[0007] Specifically, it also includes: a pressure tank and a solenoid valve, wherein the pressure tank is connected to the cathode inlet of the fuel cell stack via the solenoid valve.

[0008] Specifically, it also includes: a shut-off valve, one end of which is connected to the eddy current mixing chamber, and the other end of which is connected to the cathode inlet of the fuel cell stack.

[0009] Specifically, it also includes: a first pressure sensor, which is disposed between the eddy mixing chamber and the shut-off valve.

[0010] Specifically, it also includes a humidity sensor for detecting the humidity of the mixed gas, the humidity sensor being disposed between the eddy current mixing chamber and the cathode inlet of the fuel cell stack.

[0011] Specifically, it also includes a second pressure sensor, which is disposed between the solenoid valve and the cathode inlet of the fuel cell stack.

[0012] Specifically, it also includes a power source, the output of which is connected to the cathode of the fuel cell stack via a cable.

[0013] Specifically, it also includes a temperature sensor and a coolant channel, wherein the temperature sensor is connected to the fuel cell stack and the coolant channel is provided corresponding to the fuel cell stack.

[0014] Specifically, it also includes a gas filtration device connected to the ultrasonic atomizer.

[0015] Specifically, it also includes a pressure regulating device, one end of which is connected to the ultrasonic atomizer, and the other end of which is connected to the gas filtration device.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] Figure 1 This is a block diagram of a fuel cell stack activation system according to an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the structure of a fuel cell stack activation system according to an embodiment of this application. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0020] The fuel cell stack activation system proposed in this application is described below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of a fuel cell stack activation system according to an embodiment of this application.

[0022] like Figure 1 As shown, the fuel cell stack activation system 100 of this application may include: an ultrasonic atomizer 10 and a vortex mixing chamber 20.

[0023] The ultrasonic atomizer 10 is used to atomize liquid water into water particles. The vortex mixing chamber 20 is connected at one end to the ultrasonic atomizer 10 and at the other end to the cathode inlet of the fuel cell stack 200, so that the water particles atomized by the ultrasonic atomizer 10 are mixed with the gas and then enter the fuel cell stack 200.

[0024] Specifically, the ultrasonic atomizer 10 may include an ultrasonic generator and an atomizing head, generating a high-frequency electrical signal to drive the atomizing head to vibrate, atomizing liquid water into water particles. That is, the ultrasonic atomizer 10 can utilize high-frequency ultrasonic vibration to atomize liquid water into tiny water particles. The high-frequency vibration of the ultrasonic waves causes a large number of tiny bubbles to be generated on the liquid surface. These bubbles burst during vibration, forming fine water mist particles, which can mix with gas to form a humidified gas flow, used to regulate the humidity of the gas entering the fuel cell stack 200.

[0025] The vortex mixing chamber 20 is a cavity with vortex blades, connected at one end to the ultrasonic atomizer 10 and at the other end to the cathode inlet of the fuel cell stack 200. The vortex blades optimize the mixing effect, ensuring a uniform distribution of water particles and gas. The vortex mixing chamber 20 generates strong vortices through the vortex blades, allowing the atomized water particles and dry gas to mix thoroughly. In other words, the vortex blade design creates complex vortex motions within the mixing chamber, thoroughly mixing the water particles generated by the ultrasonic atomizer 10 with the dry gas to form a uniform humidified gas flow, ensuring a uniform humidity distribution of the gas entering the fuel cell stack 200.

[0026] Therefore, the output end of the ultrasonic atomizer 10 is connected to one end of the vortex mixing chamber 20 via a pipe, ensuring that the atomized water particles can smoothly enter the vortex mixing chamber 20. The other end of the vortex mixing chamber 20 is connected to the cathode inlet of the fuel cell stack 200 via a pipe, ensuring that the mixed humid gas can directly enter the cathode of the fuel cell stack 200. The ultrasonic atomizer 10 can generate water mist rapidly with an extremely short response time, typically on the order of milliseconds. This rapid response capability allows for more timely humidity regulation, quickly adapting to the humidity changes required during the stack activation process. In addition, the vortex mixing chamber 20 achieves uniform mixing of water particles and gas through vortex blades, ensuring a uniform distribution of gas humidity.

[0027] Therefore, this connection method not only achieves rapid response and precise control, improves membrane electrode hydration efficiency, and reduces the risk of membrane electrode damage, but also enhances the integration and adaptability of the fuel cell stack activation system 100, and improves activation efficiency and stability.

[0028] According to one embodiment of this application, such as Figure 2 As shown, the fuel cell stack activation system 100 also includes a pressure tank 30 and a solenoid valve 40, wherein the pressure tank 30 is connected to the cathode inlet of the fuel cell stack 200 via the solenoid valve 40.

[0029] Specifically, the fuel cell stack activation system 100 may further include a pressure tank 30 and a solenoid valve 40. The pressure tank 30 is connected to the cathode inlet of the fuel cell stack 200 via the solenoid valve 40. That is, the pressure tank 30 is a high-pressure resistant container that can store a certain amount of high-pressure gas. The outlet of the pressure tank 30 is connected to the solenoid valve 40 via a pipe to control the release of gas. For example, it can store gas within a certain pressure range (such as air or nitrogen), and can rapidly release high-pressure gas when needed to generate pressure pulses.

[0030] The solenoid valve 40 may include an electromagnetic coil, a valve core, and a valve seat. When the electromagnetic coil is energized, the valve core is attracted, opening the valve; when the electromagnetic coil is de-energized, the valve core returns to its original position under the action of a spring, closing the valve. In other words, the solenoid valve 40 is a device that controls the opening and closing of a valve using a magnetic field generated by an electromagnetic coil. When the electromagnetic coil is energized, the valve opens, allowing gas to pass through; when the electromagnetic coil is de-energized, the valve closes, stopping the gas flow. In the fuel cell stack activation system, the solenoid valve 40 is used to control the timing and flow rate of high-pressure gas released from the pressure tank 30 to the cathode inlet of the fuel cell stack 200, achieving precise pressure pulse control.

[0031] The outlet of the pressure tank 30 is connected to the inlet of the solenoid valve 40 via a pipeline, ensuring that high-pressure gas can enter the cathode inlet of the fuel cell stack 200 through the solenoid valve 40. The outlet of the solenoid valve 40 is also connected to the cathode inlet of the fuel cell stack 200 via a pipeline, ensuring that high-pressure gas can directly enter the cathode of the fuel cell stack 200. By controlling the opening and closing of the solenoid valve 40, the pressure tank 30 can quickly release high-pressure gas, thereby regulating the pressure at the cathode inlet of the fuel cell stack 200. Furthermore, the opening and closing time of the solenoid valve 40 is extremely short, on the order of milliseconds (e.g., <50ms), enabling rapid release of high-pressure gas. In addition, the solenoid valve 40 can precisely control the pressure pulse, including its amplitude, duration, and frequency. Pressure sensors monitor the internal pressure value of the stack in real time to ensure the accuracy of pressure regulation. Moreover, the pressure pulse can redistribute the reactant gas, especially in the gas diffusion layer, by physically impacting and clearing the micropores of the GDL, ensuring uniform gas distribution within the stack and improving stack performance.

[0032] Thus, through rapid response and precise control, the pressure at the cathode inlet of the fuel cell stack 200 is regulated, improving stack performance, reducing the risk of membrane electrode damage, and enhancing the system's integration and adaptability.

[0033] According to one embodiment of this application, such as Figure 2 As shown, the fuel cell stack activation system 100 includes: a shut-off valve 50, one end of which is connected to the eddy current mixing chamber 20, and the other end of which is connected to the cathode inlet of the fuel cell stack 200.

[0034] Specifically, the fuel cell stack activation system 100 may include a shut-off valve 50. The shut-off valve 50 may include a valve body, a valve stem, a valve core, and a valve seat. The valve body is the main body of the valve. The valve stem moves up and down via threads or a guide device on the valve body. The valve core and the valve seat have a tight sealing surface, achieving gas shut-off or flow control. In other words, the shut-off valve 50 is a valve that controls the opening and closing of the valve core and valve seat by the up and down movement of the valve stem, thereby controlling gas flow. When the valve stem moves upward, the valve core leaves the valve seat, allowing gas to flow; when the valve stem moves downward, the valve core and valve seat are tightly fitted, stopping gas flow. In the fuel cell stack activation system 100, the shut-off valve 50 is used to control the flow rate and time of the humid gas in the eddy current mixing chamber 20 entering the cathode inlet of the fuel cell stack 200, ensuring precise gas supply.

[0035] One end of the shut-off valve 50 is connected to the outlet of the eddy mixing chamber 20 via a pipe, ensuring that the humid gas mixed in the eddy mixing chamber 20 can enter the cathode inlet of the fuel cell stack 200 through the shut-off valve 50. The other end of the shut-off valve 50 is connected to the cathode inlet of the fuel cell stack 200 via a pipe, ensuring that the humid gas can accurately enter the cathode of the fuel cell stack 200. The shut-off valve 50 can adjust the opening degree between the valve core and the valve seat by moving the valve stem up and down, thereby precisely controlling the gas flow rate. This precise flow control is crucial for the activation process of the fuel cell stack 200, ensuring the stability and uniformity of the gas supply. The shut-off valve 50 can respond quickly to commands, realizing rapid opening and closing of the gas flow. By precisely controlling the time when the gas enters the fuel cell stack 200, precise control of the activation process can be achieved.

[0036] Therefore, by precisely controlling the gas flow rate and timing through the shut-off valve 50, accurate gas supply is ensured, improving the system's reliability, flexibility, and integration. The use of the shut-off valve 50 not only simplifies the design of the piping system but also reduces system complexity and maintenance costs, making it of significant application value and with broad market prospects in the field of fuel cell stack activation.

[0037] According to one embodiment of this application, such as Figure 2 As shown, the fuel cell stack activation system 100 includes a first pressure sensor 60, which is disposed between the eddy current mixing chamber 20 and the shut-off valve 50.

[0038] Specifically, the fuel cell stack activation system 100 may further include a first pressure sensor 60, which is disposed between the eddy mixing chamber 20 and the shut-off valve 50. The first pressure sensor 60 can monitor the gas pressure between the eddy mixing chamber 20 and the shut-off valve 50 in real time and feed the pressure data back to the central control unit (not shown in the figure). The central control unit performs precise pressure control based on this data to ensure that the fuel cell stack activation system 100 operates within the set pressure range. In addition, the first pressure sensor 60 can detect pressure abnormalities, such as excessively high or low pressure, and promptly issue an alarm to remind operators to take measures to prevent system failure or safety accidents.

[0039] Thus, by accurately monitoring gas pressure and providing real-time feedback, it enhances the stability, safety, and optimizes the activation process of the fuel cell stack activation system 100. The high-precision measurement and closed-loop control mechanism of the first pressure sensor 60 make it an indispensable part of the fuel cell stack activation system, ensuring that the system operates under efficient, safe, and stable conditions.

[0040] According to one embodiment of this application, such as Figure 2As shown, the fuel cell stack activation system 100 also includes a humidity sensor 70 for detecting the humidity of the mixed gas. The humidity sensor is disposed between the eddy current mixing chamber 20 and the cathode inlet of the fuel cell stack 200.

[0041] Specifically, the fuel cell stack activation system 100 may also include a humidity sensor 70 for detecting the humidity of the mixed gas. The humidity sensor can monitor the humidity of the mixed gas in real time and feed the humidity data back to the central control unit. The central control unit performs precise humidity control based on this data to ensure that the gas entering the fuel cell stack 200 has accurate humidity. The humidity sensor is installed on the pipe between the eddy current mixing chamber 20 and the cathode inlet of the fuel cell stack 200 to ensure that the humidity of the mixed gas flowing out of the eddy current mixing chamber 20 and about to enter the fuel cell stack 200 can be monitored in real time.

[0042] Therefore, the central control unit can adjust the atomization amount of the ultrasonic atomizer 10 in real time based on the data fed back by the humidity sensor, ensuring that the humidity of the mixed gas is within the set range. This closed-loop control mechanism can effectively reduce humidity fluctuations and improve system stability. By monitoring humidity in real time, the humidity sensor can promptly detect humidity anomalies, preventing excessive humidity or dryness and protecting the fuel cell stack 200 from the effects of improper humidity. In addition, the humidity sensor can detect humidity anomalies, such as excessively high or low humidity, and issue an alarm in a timely manner to remind operators to take measures to prevent system failures or safety accidents.

[0043] Therefore, by accurately monitoring the humidity of the mixed gas, the humidity sensor provides real-time feedback, enhancing the stability and safety of the system and optimizing the activation process. The high-precision measurement and closed-loop control mechanism of the humidity sensor make it an indispensable part of the fuel cell stack activation system, ensuring that the system operates under efficient, safe and stable conditions.

[0044] According to one embodiment of this application, such as Figure 2 As shown, the fuel cell stack activation system 100 also includes a second pressure sensor 80, which is disposed between the solenoid valve 40 and the cathode inlet of the fuel cell stack 200.

[0045] Specifically, the fuel cell stack activation system 100 may also include a second pressure sensor 80. The main function of the second pressure sensor 80 is to monitor the gas pressure between the solenoid valve 40 and the cathode inlet of the fuel cell stack 200 in real time and feed the pressure data back to the central control unit. The central control unit performs precise pressure control based on this data to ensure that the gas entering the fuel cell stack 200 has a precise pressure.

[0046] The second pressure sensor 80 is installed on the pipeline between the solenoid valve 40 and the cathode inlet of the fuel cell stack 200. This ensures real-time monitoring of the gas pressure flowing from the solenoid valve 40 and about to enter the fuel cell stack 200. Furthermore, the output interface of the second pressure sensor 80 can be connected to the input of the central control unit via a cable, transmitting pressure data to the central control unit in real time. Based on the data fed back from the second pressure sensor 80, the central control unit can adjust the opening and closing time of the solenoid valve 40 in real time to ensure the gas pressure remains within the set range. This closed-loop control mechanism effectively reduces pressure fluctuations and improves system stability. In addition, by monitoring the pressure in real time, the second pressure sensor 80 can promptly detect pressure anomalies, preventing overpressure and protecting the system and fuel cell stack 200 from high-pressure damage.

[0047] Therefore, the second pressure sensor 80 provides real-time feedback by accurately monitoring gas pressure, thereby enhancing the stability and safety of the system and optimizing the activation process. The high-precision measurement and closed-loop control mechanism of the second pressure sensor 80 make it an indispensable part of the fuel cell stack activation system, ensuring that the system operates under efficient, safe and stable conditions.

[0048] According to one embodiment of this application, the fuel cell stack activation system 100 further includes a power source (not shown in the figure), the output of which is connected to the cathode of the fuel cell stack 200 via a cable.

[0049] Specifically, the fuel cell stack activation system 100 also includes a power supply, which is a device capable of converting input electrical energy into the required output current and voltage. In the fuel cell stack activation system 100, the power supply can be a programmable DC power supply, capable of outputting precise current and voltage according to a set program. The power supply may include an input terminal, a conversion circuit, an output terminal, and a control unit. The input terminal receives mains power or DC power, the conversion circuit converts the input electrical energy into the required DC output, the output terminal is connected to the load (fuel cell stack 200) via a cable, and the control unit is used to regulate and control the output current and voltage. This enables precise current loading to the fuel cell stack 200, ensuring the accuracy and stability of current control during the activation process. During activation, the power supply gradually adjusts the output current according to the instructions of the central control unit, achieving a stepped current loading.

[0050] The power supply's output is connected to the cathode of the fuel cell stack 200 via a cable, ensuring that current can be directly applied to the fuel cell stack 200. The cable selection must consider the current magnitude and transmission distance to minimize voltage drop and energy loss during transmission. The power supply's control terminal is connected to the output of the central control unit via a cable. The central control unit adjusts the power supply's output current and voltage through control signals. The power supply can achieve stepped current loading according to the instructions of the central control unit. For example, the current can start from 1.0 A / cm². 2 Gradually increase to 2.2 A / cm 2 Step-by-step control is used to avoid damage to the fuel cell stack caused by sudden high current.

[0051] Therefore, by precisely controlling the current loading and providing real-time feedback, the power supply enhances the stability and safety of the system and optimizes the activation process. The high-precision control and closed-loop control mechanism of the power supply make it an indispensable part of the fuel cell stack activation system, ensuring that the system operates under efficient, safe and stable conditions.

[0052] According to one embodiment of this application, the fuel cell stack activation system 100 further includes a temperature sensor (not shown in the figure) and a coolant channel (not shown in the figure). The temperature sensor is connected to the fuel cell stack 200, and the coolant channel is provided corresponding to the fuel cell stack 200.

[0053] Specifically, the fuel cell stack activation system 100 may also include a temperature sensor and a coolant channel. The temperature sensor monitors the temperature of the fuel cell stack 200 in real time and feeds the temperature data back to the central control unit. The central control unit performs precise temperature control based on this data to ensure that the stack operates within a suitable temperature range. The coolant channel is a piping system for circulating coolant. The circulation of coolant removes the heat generated by the stack, maintaining a stable stack temperature. The coolant can be water or a mixture of water and ethylene glycol, which has good thermal conductivity and antifreeze properties. The coolant channel typically includes an inlet, an outlet, coolant pipes, and a coolant pump. The inlet and outlet are connected to the coolant inlet and outlet of the stack, respectively. The coolant pipes circulate the coolant, and the coolant pump drives the circulation. Thus, by circulating the coolant, the heat generated by the stack is removed, maintaining the stack temperature within a set range. The central control unit adjusts the coolant pump speed or coolant flow rate based on the data fed back from the temperature sensor, achieving precise temperature control.

[0054] Temperature sensors are installed on the surface or inside the fuel cell stack 200, in direct contact with the fuel cell stack 200, ensuring real-time monitoring of the fuel cell stack 200's temperature. The output interface of the temperature sensor is connected to the input terminal of the central control unit via a cable, transmitting temperature data to the central control unit in real time. The inlet and outlet of the coolant channel are connected to the coolant inlet and outlet of the fuel cell stack 200, respectively, ensuring smooth coolant circulation. The control terminal of the coolant pump is connected to the output terminal of the central control unit via a cable, and the central control unit adjusts the coolant pump speed or coolant flow rate through control signals.

[0055] Therefore, by precisely monitoring and controlling the stack temperature, temperature sensors and coolant channels help optimize the fuel cell stack activation process, improving activation efficiency and stack performance. Accurate temperature monitoring and regulation provides real-time feedback, enhancing system stability, safety, and optimizing the activation process. The high-precision measurement of temperature sensors and the efficient heat dissipation of coolant channels make them indispensable parts of the fuel cell stack activation system, ensuring efficient, safe, and stable operation.

[0056] According to one embodiment of this application, such as Figure 2 As shown, the fuel cell stack activation system 100 also includes a gas filtration device 90, which is connected to the ultrasonic atomizer 10.

[0057] Specifically, the fuel cell stack activation system 100 may also include a gas filtration device 90, which may include one or more filter units. Each filter unit may contain different types of filter materials, such as filter screens, activated carbon, chemical absorbents, or membrane materials. The housing of the filter device is typically made of corrosion-resistant materials to accommodate different types of gases. The gas filtration device 90 removes impurities, particulate matter, moisture, and harmful gases from the gas using physical or chemical methods. This removes impurities and harmful substances from the gas, ensuring that the gas entering the ultrasonic atomizer 10 has high purity and cleanliness. This helps improve the performance and lifespan of the ultrasonic atomizer 10, while ensuring that the gas entering the fuel cell stack 200 does not contaminate or damage the stack.

[0058] The outlet of the gas filter 90 is connected to the inlet of the ultrasonic atomizer 10 via a pipe, ensuring that the filtered gas can smoothly enter the ultrasonic atomizer 10. The selection of the pipe needs to consider the gas flow rate and pressure to reduce energy loss during transmission. Thus, the gas filter 90 can effectively remove particulate matter, dust, moisture, and other impurities from the gas, ensuring that the gas entering the ultrasonic atomizer 10 has high purity. By removing impurities from the gas, the gas filter 90 can reduce wear and clogging of the ultrasonic atomizer 10, extending its service life. By ensuring the cleanliness of the gas entering the fuel cell stack, the gas filter 90 helps optimize the activation process of the fuel cell stack, improving activation efficiency and stack performance.

[0059] According to one embodiment of this application, such as Figure 2 As shown, the fuel cell stack activation system 100 also includes a pressure regulating device 95, one end of which is connected to the ultrasonic atomizer 10, and the other end of which is connected to the gas filter device 90.

[0060] Specifically, the fuel cell stack activation system 100 may further include a pressure regulating device 95, which may include a pressure reducing valve, a pressure sensor, and a controller. The pressure reducing valve is used to regulate the gas pressure, the pressure sensor is used to monitor the gas pressure in real time, and the controller adjusts the opening of the pressure reducing valve according to the feedback signal from the pressure sensor to achieve precise pressure control. This ensures that the gas entering the ultrasonic atomizer 10 has a stable and precise pressure. This helps to improve the atomization effect of the ultrasonic atomizer 10, ensuring that the atomized water particles are uniform and fine, thereby improving the activation efficiency of the fuel cell stack 200.

[0061] The inlet of the pressure regulating device 95 is connected to the outlet of the gas filter 90 via a pipe, ensuring that the filtered gas can smoothly enter the pressure regulating device 95. The outlet of the pressure regulating device 95 is connected to the inlet of the ultrasonic nebulizer 10 via a pipe, ensuring that the pressure-regulated gas can smoothly enter the ultrasonic nebulizer 10. In addition, the pressure sensor and controller in the pressure regulating device 95 can also be connected to the central control unit via a cable. The central control unit adjusts the opening of the pressure reducing valve according to the feedback signal from the pressure sensor to achieve precise pressure control.

[0062] The pressure regulating device 95 ensures that the gas entering the ultrasonic atomizer 10 has a stable and precise pressure, reduces the impact of pressure fluctuations on the atomization effect, and ensures that the gas pressure is within the set range. The pressure regulating device 95 can protect the ultrasonic atomizer 10 and other equipment from high pressure damage, extend the service life of the equipment, and optimize the performance of the ultrasonic atomizer 10 by precisely controlling the gas pressure, ensuring that the atomized water particles can be uniformly mixed with the gas before entering the fuel cell stack 200.

[0063] Therefore, the pressure regulating device 95 ensures that the gas entering the ultrasonic atomizer 10 has a stable and precise pressure by precisely controlling the gas pressure, thereby improving the atomization effect of the ultrasonic atomizer 10 and optimizing the activation process of the fuel cell stack 200. The high-precision control and closed-loop control mechanism of the pressure regulating device 95 make it an indispensable part of the fuel cell stack activation system, ensuring that the system operates under efficient, safe and stable conditions.

[0064] In summary, according to the fuel cell stack activation system of this application, the ultrasonic atomizer is used to atomize liquid water into water particles. One end of the vortex mixing chamber is connected to the ultrasonic atomizer, and the other end of the vortex mixing chamber is connected to the cathode inlet of the fuel cell stack, so that the water particles atomized by the ultrasonic atomizer are mixed with the gas and then enter the fuel cell stack, thereby enabling rapid generation of water mist, short response time, improved membrane electrode hydration efficiency, and enhanced fuel cell stack activation efficiency.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0067] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0068] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A fuel cell stack activation system characterized by comprising: include: An ultrasonic atomizer is used to atomize liquid water into water particles. A vortex mixing chamber is provided, with one end connected to the ultrasonic atomizer and the other end connected to the cathode inlet of the fuel cell stack, so that the water particles atomized by the ultrasonic atomizer are mixed with the gas and then enter the fuel cell stack.

2. The fuel cell stack activation system of claim 1, wherein Also includes: A pressure tank and a solenoid valve, wherein the pressure tank is connected to the cathode inlet of the fuel cell stack via the solenoid valve.

3. The fuel cell stack activation system of claim 1, wherein, Also includes: A shut-off valve, one end of which is connected to the eddy current mixing chamber, and the other end of which is connected to the cathode inlet of the fuel cell stack.

4. The fuel cell stack activation system according to claim 3, characterized in that, Also includes: A first pressure sensor is disposed between the eddy mixing chamber and the shut-off valve.

5. The fuel cell stack activation system of claim 1, wherein, Also includes: A humidity sensor for detecting the humidity of the mixed gas is disposed between the eddy current mixing chamber and the cathode inlet of the fuel cell stack.

6. The fuel cell stack activation system of claim 2, wherein It also includes a second pressure sensor, which is disposed between the solenoid valve and the cathode inlet of the fuel cell stack.

7. The fuel cell stack activation system of claim 1, wherein It also includes a power source, the output of which is connected to the cathode of the fuel cell stack via a cable.

8. The fuel cell stack activation system of claim 1, wherein, It also includes a temperature sensor and a coolant channel, the temperature sensor being connected to the fuel cell stack and the coolant channel being provided corresponding to the fuel cell stack.

9. The fuel cell stack activation system of claim 1, wherein, It also includes a gas filtration device, which is connected to the ultrasonic atomizer.

10. The fuel cell stack activation system of claim 9, wherein, It also includes a pressure regulating device, one end of which is connected to the ultrasonic atomizer, and the other end of which is connected to the gas filtration device.

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