32 results about "Humistor" patented technology

The invention provides a fuel cell system and a low idle speed control method thereof, and belongs to the technical field of fuel cells. The fuel cell system comprises an electric pile and accessory equipment, the accessory equipment comprises an air compressor, an intercooler, a humidifier, an expansion machine and a regulating valve, and the regulating valve comprises a bypass valve and a pile entering stop valve; filtered air enters the cathode input end of the electric pile through the air compressor, the intercooler, the humidifier and the pile entering stop valve in sequence, the first output end of the intercooler is connected with the input end of the expansion machine through the bypass valve, and the expansion machine and a motor of the air compressor coaxially rotate. The low idle speed control method comprises the following steps: controlling accessory equipment to operate in a lowest power consumption mode, and then obtaining load current of a galvanic pile and the opening degree of a regulating valve; and carrying out iterative adjustment on the load current of the electric pile and the opening degree of an adjusting valve by taking the voltage parameter value of the electric pile meeting a preset condition as a target, so as to carry out low-idle-speed control on the fuel cell system. According to the invention, low-power and high-efficiency operation of the fuel cell system can be realized, and energy loss is reduced.

The invention provides a fuel cell system and a humidification control method thereof. The fuel cell system comprises an electric pile, a humidifier and an air pipeline, wherein the air pipeline comprises a dry air inlet header pipe, an air pile inlet pipeline, a dry air bypass, an air return pipeline, a backpressure pipeline and a bypass pipeline; one end of the air return pipeline is connected with an air outlet of the galvanic pile, and the other end is connected with a return air inlet of the humidifier; one end of the backpressure pipeline is connected with a backflow air outlet of the humidifier, and the other end is communicated with external atmosphere; two ends of the bypass pipeline are connected with an air return pipeline and a backpressure pipeline; a first throttle valve is arranged in the dry air inlet main pipe; a second throttle valve is arranged in the dry air bypass; a third throttle valve is arranged in the air return pipeline; and a fourth throttle valve is arranged in the bypass pipeline. In this way, when humidification is needed, the opening degree of the first throttle valve and the third throttle valve can be increased, the opening degree of the second throttle valve and the fourth throttle valve can be reduced, the water supplementing requirement of the humidifier is lowered, and the problems in the prior art are solved.

The invention discloses a humidifier attenuation degree online diagnosis method, a humidity adjusting method and a fuel cell system. The online diagnosis method comprises the following steps: S1, when a fuel cell system operates at a set diagnosis current, obtaining a high-frequency impedance value of a fuel cell stack; s2, determining a cathode inlet humidity value under the diagnosis current according to the high-frequency impedance value based on a preset relation mapping table of the high-frequency impedance value and the cathode inlet humidity; s3, acquiring operation parameters of the fuel cell system under the diagnosis current, wherein the operation parameters at least comprise cathode inlet total pressure, cathode outlet total pressure, cooling path inlet temperature, cooling path outlet temperature and air flow parameters; s4, according to the cathode inlet humidity value and the operation parameters, the water transmission coefficient of the humidifier in the current state is calculated; and S5, determining the attenuation degree of the humidifier according to the calculated water transmission coefficient based on a preset relation mapping table of the water transmission coefficient and the attenuation degree of the humidifier.

The application provides a fuel cell system and a low-idling control method thereof, and belongs to the technical field of fuel cells. The fuel cell system comprises a stack and accessory equipment, the accessory equipment comprises an air compressor, a intercooler, a humidifier, an expander and a regulating valve, the regulating valve comprises a bypass valve and an inlet valve, filtered air enters a cathode input end of the stack in sequence through the air compressor, the intercooler, the humidifier and the inlet valve, a first output end of the intercooler is connected with an input end of the expander through the bypass valve, and the expander rotates coaxially with a motor of the air compressor. The low-idling control method comprises the following steps: controlling the accessory equipment to operate in a minimum power consumption mode, then acquiring a pull current of the stack and an opening degree of the regulating valve; and taking a voltage parameter value of the stack meeting a preset condition as a target, iteratively adjusting the pull current of the stack and the opening degree of the regulating valve, so as to control the fuel cell system in a low-idling mode. The application can realize low-power and high-efficiency operation of the fuel cell system and reduce energy loss.

The invention relates to the technical field of fuel cells, and discloses a fuel cell humidifier with a novel structure, the fuel cell humidifier comprises a main body shell and a bundling shell, the bundling shell is assembled on an internal end plate of the main body shell, and the bundling shell is provided with an internal slide block structure; the internal sliding block structure is in sliding fit with an end plate in the main body shell so as to adjust the size of the bundling shell, a hollow fiber membrane tube is arranged in the bundling shell, the hollow fiber membrane tube is fixed with the main body shell through a pouring sealant surface, two ends of the main body shell are detachably connected with end covers, and the end covers are used for being connected with a dry gas path. A pressure regulating valve is installed on the main body shell and used for balancing the pressure difference of a dry path and a wet path, and a connector sliding block is arranged at a connector of the main body shell and is in sliding connection with the connector of the main body shell so as to adjust the direction of the connector of the wet path. The humidifier is used for solving the problems that an existing humidifier is insufficient in anti-compression and anti-impact strength, poor in plasticity and limited in adaptability, and the use stability is affected by differential pressure fluctuation of a dry path and a wet path.

The invention belongs to the technical field of battery management, and particularly relates to a fuel cell cathode rapid lifting and loading system and a control method thereof, the fuel cell cathode rapid lifting and loading system comprises an air filter, an air compressor, an intercooler, a humidifier, a tail exhaust, a rapid lifting and loading valve, a dry air inlet valve, a wet air inlet valve, a humidifier humidity regulating valve, a back pressure valve and a control unit; according to the invention, the quick lifting and loading valve is additionally arranged between the intercooler and the tail exhaust, so that excess air generated by acceleration of the air compressor can be directly bypassed to the tail exhaust during lifting and loading, the problem of unsmooth exhaust caused by mismatching of response speeds of the air compressor and the back pressure valve is effectively solved, and the lifting and loading time of the fuel cell from low power to high power is remarkably shortened; under the working condition of load reduction, the valve can quickly discharge redundant air, and can be matched with accurate down-regulation of the rotating speed of an air compressor to realize quick falling of the electric pile power, so that the dynamic response requirement of a whole vehicle power system is met.

1. The name of the design product: humidification module. 2. The use of the design product: a humidification module for constant temperature and humidity box, humidity generator, air humidifier and other products. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view. 5. The design claimed contains color.

The present invention relates to the field of fuel cell water balance regulation, and discloses a fuel cell water balance regulation system and method, comprising: an electronic control unit, a first electronically controlled three-way valve, an air outlet throttle, a humidifier, a second electronically controlled three-way valve, and a fuel cell stack, wherein the electronic control unit is connected to the first electronically controlled three-way valve, the air outlet throttle, the second electronically controlled three-way valve, and the fuel cell stack respectively, the first electronically controlled three-way valve, the humidifier, and the access end of the fuel cell stack are connected in sequence, the outlet end of the fuel cell stack, the second electronically controlled three-way valve, the humidifier, and the air outlet throttle are connected in sequence, and a voltage inspection module is provided on the fuel cell stack, which is connected to the electronic control unit. The present invention analyzes the impedance value detected in real time by the voltage inspection module through the electronic control unit, then determines whether it is necessary to change the fuel cell stack intake humidity based on the analysis result, and then completes the internal water balance regulation of the fuel cell stack by regulating the fuel cell stack water temperature, the air outlet throttle, and the second electronically controlled three-way valve.

The invention belongs to the technical field of fuel cell engines. The air system comprises an air compressor, an intercooler, a humidifier, an electric pile outlet air stop valve, an electric pile inlet air stop valve, a humidifier bypass valve, a fuel cell air inlet bypass valve, a back pressure valve, an air flow meter, an intercooler rear pressure sensor, an electric pile inlet pressure sensor and an electric pile inlet temperature sensor. The stack outlet temperature sensor, the sensor assembly for the bench test, the mass spectrometer for the bench test, the air inlet pipeline and the air outlet pipeline are detachable parts, and the sensor assembly for the bench test and the mass spectrometer for the bench test are used for the bench test and are detached after the test is finished. According to the invention, the detachable sensor assembly and the mass spectrometer are additionally arranged in the air system, and interlocking optimization is carried out by combining a bench test control method and a performance calculation result, so that the accuracy of a bench test result is ensured, the battery pack is protected, the calibration method has very important significance in the calibration process of the fuel cell engine, and the cost is saved.

The invention discloses a humidifier type fuel cell air supply and exhaust system for a cogeneration device. An electric control three-way valve comprises an internal electric control mechanism, a first air inlet, a first air outlet and a second air outlet, wherein the first air inlet, the first air outlet and the second air outlet are arranged outside the electric control mechanism; the humidifier comprises a dry side inlet and a dry side outlet which correspond to each other, a wet side inlet and a wet side outlet which correspond to each other, the dry side inlet and the wet side outlet are located on the same side of the humidifier, the dry side outlet and the wet side inlet are located on the other side of the humidifier, and the dry side inlet and the dry side outlet are connected through a humidifier bypass valve outside the humidifier. The dry side outlet is connected with an electric pile air inlet of each electric pile air cavity, and an electric pile air outlet of each electric pile air cavity is connected with the wet side inlet. According to the invention, the active regulation and control of the actual air flow of each fuel cell stack can be realized, the air humidity of the stack air inlet of each stack can be regulated and controlled, the operability and durability of the working conditions of each fuel cell stack are considered, and the system is simple in structure and low in cost.

1. The name of the design product: membrane humidifier. 2. The use of the design product: for adjusting the air humidity entering the stack, keeping the proton exchange membrane humid. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The utility model relates to the technical field of fuel cells, in particular to a fuel cell system which comprises a humidifier, a back pressure valve, a shunting module, an air inlet system, an electric pile, an expansion machine and a tail exhaust, the expansion machine is communicated with the tail exhaust; a dry air inlet port of the humidifier is communicated with an air outlet end of the air inlet system, and the humidifier is communicated with the electric pile; the air inlet end of the back pressure valve is communicated with the exhaust port of the humidifier; the shunting module is provided with two groups of passages which are respectively communicated with the back pressure valve and the expansion machine, one group of passages is opened when the fuel cell system is less than or equal to the set drainage power, and the other group of passages is opened when the fuel cell system is greater than the set drainage power. By controlling the opening and closing states of the two groups of passages of the shunting module, the flow direction of gas exhausted from the cathode of the electric pile can be reasonably distributed, the overall energy utilization rate can be improved, and the reliability of the expansion machine can be guaranteed.

The utility model relates to the technical field of fuel cell systems, in particular to a fuel cell with a humidity real-time control system, which comprises a cathode air supply system and a measuring system, the cathode air supply system comprises an air compressor, a humidity regulating valve, a back pressure valve, a humidifier and an intercooler, the air outlet end of the air compressor is connected with one end of the intercooler, and the other end of the intercooler is connected with the measuring system. The other end of the intercooler is divided into two paths to be respectively connected with one end of a stop valve and one end of a humidity regulating valve, an inlet and an outlet of a cooling cavity of the intercooler are directly connected with the galvanic pile in parallel to form an independent intercooler-galvanic pile water cooling loop, the other end of the stop valve is connected with an air inlet of the humidifier, and the other end of the humidity regulating valve is connected with an air outlet of the humidifier and is communicated with the air inlet of the galvanic pile. Compared with the prior art, the method has the advantages that the target cathode air inlet humidity can be obtained by presetting the current for the cathode air supply system, when the deviation between the target cathode air inlet humidity and the target cathode air inlet humidity is larger than the set threshold value, the in-pile humidity adjustment is rapidly achieved by adjusting the flow of dry air entering the electric pile to change the dry-wet ratio of mixed gas, and the method can rapidly adapt to the dynamic working condition humidity.

The application provides an electric heating compensation type spray evaporation cavity, an air intake system and a control method thereof. The spray evaporation cavity is sequentially provided with an inlet, a high-pressure nozzle, an evaporation cavity and an outlet along an air intake direction. The high-pressure nozzle is used for spraying water mist into the evaporation cavity, and the sprayed water mist has the same velocity component as the air intake direction. A heating array composed of multiple electric heating sheets is arranged in a region where the gas in the evaporation cavity and the water mist are mixed. By using the electric heating compensation type spray evaporation cavity provided by the application in the air intake system, the change range of temperature and humidity can be improved compared with the traditional membrane humidifier, the controllability is increased, so that the low-power operation condition of the fuel cell system is better adapted, and in the high-power operation condition, the electric compensation can be closed, and the heat required for the droplet gasification is completely provided by the high-temperature air at the outlet of the air compressor, so that the energy consumption is further reduced.

The present invention belongs to the field of intelligent humidity control for fuel cells and provides a method and system for variable humidity control of fuel cells based on fuzzy theory. The method includes determining the current proton exchange membrane water content and the optimal membrane water content of the fuel cell for the next target operating condition, calculating the difference between the two and determining the amount of humidity increase / decrease; forming a fuzzy membership function based on the driver's urgency to change the operating condition and the amount of humidity increase / decrease, combined with the load of the current and next operating conditions, and constructing a fuzzy control rule library based on the driver's urgency to change the operating condition, load changes, and humidity changes; collecting real-time operating data and determining the optimal amount of humidity increase / decrease using the fuzzy control rule library; and converting the optimal amount of humidity increase / decrease into an output PWM wave to control the humidifier motor voltage, thereby controlling the motor speed to achieve the desired amount of humidity increase / decrease.

The invention discloses a fuel cell control device and method. The control device is characterized in that humidifying inlet pressure sensors are arranged on a humidifier and an intercooler, hydrogen backflow pressure sensors are arranged on an ejector and a water segregator, and a heat dissipation outlet temperature sensor is arranged on a heat dissipation device; the control method comprises the following steps: detecting the current working state of an in-pile sensor, and judging whether to switch a corresponding subsystem sensor for replacement detection or not; and the monitoring value of the fault-tolerant sensor is collected, and the fault-tolerant control quantity of the reactor fluid is calculated and converted to replace closed-loop regulation. When an original in-pile fluid sensor loses efficacy, air in-pile pressure control can be replaced by humidifier inlet pressure, hydrogen in-pile pressure control can be replaced by hydrogen backflow pressure, and cooling liquid in-pile temperature control can be replaced by radiator outlet temperature. Therefore, sustainable operation of the fuel cell is ensured, and the fuel cell is prevented from emergency shutdown to damage the stack.

The application provides a humidifying and silencing composite device and a fuel cell system, which comprises a humidifier, a silencing assembly and an air outlet chamber. The humidifier comprises a cavity, the cavity is provided with a wet air inlet and a wet air outlet, one side of the cavity is provided with a dry air inlet, the other side of the cavity is provided with a dry air outlet, the silencing assembly is arranged on the dry air inlet and comprises a silencing chamber and a dispersion pipe, the dispersion pipe is arranged in the silencing chamber from outside to inside, and the air outlet chamber is arranged on the dry air outlet, wherein the air outlet chamber is provided with an air outlet pipe, the dispersion pipe is provided with a micro-perforated structure arranged around the dispersion pipe, the micro-perforated structure comprises a plurality of uniformly distributed micro-holes, and the aperture and the number of the micro-holes are set according to the silencing frequency. The front end cover and the rear end cover of the existing humidifier are removed and replaced by the silencing assembly and the air outlet chamber, so that the humidifier and the silencer are combined, the dry air can be humidified and de-noised, the volume of the humidifier is not changed greatly compared with the existing humidifier, and the space of the proton exchange membrane fuel cell system is greatly saved.

The present application relates to the technical field of fuel cell, and discloses a fuel cell system and a use method thereof, which comprises an air filter, a flowmeter, an air compressor, a middle cooler, a humidifier, an electric pile and a DC / DC converter, the air filter, the flowmeter, the air compressor and the middle cooler are sequentially connected, the middle cooler is connected with the humidifier, the humidifier is connected with the electric pile, the electric pile is connected with the DC / DC converter, and the system further comprises a three-way valve, a stop valve, two air pressure sensors and an FCU, the three-way valve is arranged on a pipeline between the middle cooler and the humidifier, the stop valve is connected with the humidifier, the two air pressure sensors are arranged at air inlet and outlet of the electric pile respectively, and the air compressor, the three-way valve, the stop valve, the two air pressure sensors and the DC / DC converter are connected with the FCU through a control wire harness.The present application can ensure the supply of oxidant when the current is extracted and ensure the normal start of the system through the air inlet and outlet pile pressure judgment; and the present application can effectively judge the cathode sealing failure state and trigger active maintenance through the shutdown time interval and the potential establishment condition when starting.

The invention discloses a fuel cell system and an operation and maintenance self-cleaning control method thereof, and belongs to the technical field of fuel cell systems. The system comprises an air filter, an air flow meter, an air compressor, an intercooler, an air stop valve, an air bypass valve, a humidifier, a temperature, humidity and pressure integrated sensor, a back pressure valve, an electric valve from an air path to a cooling path, an electric valve from the cooling path to the air path, a hydrogen inlet electromagnetic valve, a hydrogen supply module, a hydrogen pressure sensor, a water segregator, a hydrogen circulating pump, an anode hydrogen discharge valve and an anode discharge valve. The system comprises a hydrogen path-to-cooling path electromagnetic valve, a cooling path-to-hydrogen path electromagnetic valve, a cooling path-to-hydrogen path electromagnetic valve, a cooling path outlet temperature and pressure integrated sensor, a cooling path water pump, an electric three-way valve, a deionizer, a PTC heater, a cooling path inlet temperature and pressure integrated sensor, a drain valve, a radiator module, a water replenishing tank, a tail discharge pipe, an electric pile, an external water storage tank and a water replenishing pump. According to the invention, the self-cleaning control of the fuel cell system can be realized, the service life is prolonged, and the maintenance convenience is improved.

The utility model provides an air supply system and a fuel cell engine with the same. The air supply system includes: a supercharger having a pressure end inlet and a pressure end outlet; the intercooler is communicated with the pressure end outlet; the humidifier is positioned between the intercooler and the electric pile structure and is used for humidifying gas entering the air inlet of the electric pile structure; the two ends of the first pipeline communicate with the air outlet and the air inlet of the intercooler, and the humidifier is arranged on the first pipeline; the first bypass valve is arranged on the first pipeline and is connected with the humidifier in parallel; two ends of the bypass pipeline are respectively communicated with an air outlet of the intercooler and an air outlet of the galvanic pile structure; wherein the bypass pipeline and the humidifier are arranged in parallel. The air supply system solves the problem that an air supply system in the prior art is prone to surging at a small flow point.

This invention relates to a two-stage back pressure valve cathode air pressure regulation architecture for fuel cells, comprising an air filter, an air compressor, an intercooler, a humidifier, and a fuel cell stack connected in sequence. The key feature is that a primary back pressure valve is installed on the air pipeline between the fuel cell stack and the humidifier, and a secondary back pressure valve is installed on the air pipeline after the humidifier. By installing a primary back pressure valve between the fuel cell stack and the humidifier, and a secondary back pressure valve after the humidifier, this invention achieves coordinated regulation of air pressure and humidity, effectively solving the problems of decoupling humidity and pressure control and poor responsiveness in existing technologies, and improving the stability and dynamic response capability of the fuel cell system.

Provided is an aerosol generating device including a housing including an accommodation portion into which an aerosol generating article is inserted, a heater arranged on one surface of a film and configured to heat the aerosol generating article when power is supplied thereto, a humistor sensor arranged on the one surface of the film and configured to detect humidity of the aerosol generating article, and a processor electrically connected to the heater and the humistor sensor, wherein the processor is configured to control power supply to the heater, based on the humidity of the aerosol generating article detected by the humistor sensor.

This invention relates to the field of fuel cell technology, specifically to a fuel cell system, vehicle, and activation method. The system includes a fuel cell stack, a nitrogen source, an air subsystem, and a hydrogen subsystem. The fuel cell stack includes an air side and a hydrogen side. The air subsystem includes a humidifier, a first throttle valve, a first muffler, and a second throttle valve. The humidifier includes an air path and an exhaust path. The air path is connected to the air-side inlet, and the air-side outlet, exhaust path, first throttle valve, first muffler, and second throttle valve are sequentially connected. The hydrogen subsystem includes a hydrogen supply device. The nitrogen source, hydrogen supply device, and hydrogen-side inlet are sequentially connected. The hydrogen side has a drain outlet, which is connected to the first muffler. This invention eliminates the need for disassembly and placement on a test bench for activation; activation can be performed directly on the vehicle, improving efficiency. The nitrogen source can be replenished periodically, with each replenishment taking only a few minutes, significantly reducing the difficulty of activation.

The application provides a control method and device of a fuel cell air system, and the fuel cell air system. In the case that the fuel cell air system runs for a first preset time period, it is determined whether an internal leakage phenomenon occurs in a humidifier. The internal leakage phenomenon is a phenomenon that air in a dry side chamber of the humidifier enters a wet side chamber of the humidifier. The first chamber is the dry side chamber of the humidifier, and the second chamber is the wet side chamber of the humidifier. In the case that it is determined that the internal leakage phenomenon occurs in the humidifier, an air excess ratio corresponding to air entering an air inlet of the fuel cell air system is adjusted to a target air excess ratio, so that air pressure entering a stack reaches a target air pressure. The technical problem that the humidifier of the fuel cell air system in the prior art may have the internal leakage phenomenon with the increase of running time, and the air metering ratio entering the stack is reduced, thereby affecting the performance of the stack, is solved. Therefore, the performance of the stack is stabilized, and the effect that the output power of an engine is stabilized is achieved.

The present invention provides an intake humidity control device for a fuel cell, belonging to the field of fuel cell technology, and solves the problem in the prior art that the humidity control effect is easily affected by usage conditions or equipment attenuation. The device includes flow control valves 1 and 2, intercoolers 1 and 2, a temperature control device, a humidifier, and a controller. The air inlet of the fuel cell stack is connected to the output end of the intake device via intercooler 1, the dry area of ​​the humidifier, and intercooler 2 in sequence; the input end of flow control valve 1 is connected to the coolant outlet of the fuel cell stack and the coolant outlets of intercoolers 1 and 2 respectively, the output end 1 is connected to the input end of flow control valve 2 via the temperature control device, and the output end 2 is connected to the coolant inlet of intercooler 2; the output end 1 of flow control valve 2 is connected to the coolant inlet of the fuel cell stack, and the output end 2 is connected to the coolant inlet of intercooler 1. The humidity of the gas entering the stack is adjusted by temperature control of the two-stage intercooler, effectively improving the environmental adaptability and the service life of the fuel cell stack.

The invention discloses a high-temperature-resistant adhesive packaging process and packaging equipment for a humidifier, and belongs to the technical field of fuel cells. The gradient glue injection and low-frequency vibration synergistic process without pre-blocking is provided for solving the problems that an existing hollow fiber membrane humidifier packaging process depends on manual pre-blocking, membrane holes are prone to being blocked, sealing performance and membrane climbing control are difficult to consider by a single glue type, the centrifugal exhaust efficiency is low, and membrane filaments are prone to being damaged by vibration equipment. The process comprises the following steps: firstly, injecting low-viscosity glue with the thickness of 2-4mm to form a sealing barrier with the climbing film length of 50-60mm, then injecting main sealant with the thickness of 40-50mm on the sealing barrier, and applying vertical low-frequency vibration with the frequency of 4-10Hz and the frequency of 3 minutes within 30 seconds after each time of glue injection so as to exhaust gas; a spring-rubber composite damping structure and a high-precision bearing table are adopted in corollary equipment, and it is ensured that the vibration direction is controllable, and a rubber layer is uniform. According to the invention, zero blockage and zero air hole are realized, the capacity of a single shift is more than 200 pieces, and the method is suitable for efficient and reliable packaging of the hollow fiber membrane humidifier of a fuel cell system.

The application relates to a hydrogen fuel cell air supply system flow resistance optimization method, in which ambient air is sequentially introduced into an air filter, an air compressor and a intercooler, heat exchange is carried out in the intercooler; a first part of the air after the heat exchange passes through a fuel cell package and a valve; meanwhile, a second part of the air flows through a fuel cell stack container cavity, a flow resistance element and an exhaust throttle valve; meanwhile, a third part of the air passes through an electric control three-way valve, the three parts of the air are finally mixed in a mixed exhaust pipeline, and are discharged into the environment again after noise reduction through a silencer. Compared with the prior art, the application meets the requirements of air temperature, air pressure, air flow and relative humidity of the air inlet of the fuel cell stack through the coordinated control of the exhaust throttle valve, the air compressor and the electric control three-way valve, reduces the pressure difference between the dry side of a humidifier and the wet side of the humidifier, and reduces the sensitivity of the air pressure and the air flow of the air inlet of the fuel cell stack to the action of an actuator.

The present application relates to the technical field of fuel cell, in particular to an activation fuel cell system, a vehicle and an activation method, the system comprises a stack, a nitrogen source, an air subsystem and a hydrogen subsystem, the stack comprises an air side inlet and a hydrogen side inlet; the air subsystem comprises a humidifier and an inlet three-way valve; the hydrogen subsystem comprises a hydrogen supply device; the inlet three-way valve is communicated with the outlet end of the hydrogen supply device through a second electromagnetic valve; the inlet three-way valve is connected between the air side inlet and the humidifier; the nitrogen source, the hydrogen supply device and the hydrogen side inlet are communicated in sequence; the present application can periodically purge and activate the fuel cell engine, and restore the performance of the stack; the nitrogen of the nitrogen source can be periodically supplemented, and the time required for supplementing nitrogen is only a few minutes, which greatly reduces the difficulty of activation and improves the efficiency.

The application discloses a humidifier attenuation degree online diagnosis method, a humidity adjusting method and a fuel cell system. The online diagnosis method comprises the following steps: S1, obtaining a high-frequency impedance value of a fuel cell stack when the fuel cell system operates at a set diagnosis current; S2, determining a cathode inlet humidity value under the diagnosis current according to the high-frequency impedance value based on a preset high-frequency impedance value and cathode inlet humidity relationship mapping table; S3, obtaining operation parameters of the fuel cell system under the diagnosis current, wherein the operation parameters at least comprise a cathode inlet total pressure, a cathode outlet total pressure, a cooling path inlet temperature, a cooling path outlet temperature and an air flow parameter; S4, calculating a water transfer coefficient of the humidifier under a current state according to the cathode inlet humidity value and the operation parameters; and S5, determining the attenuation degree of the humidifier according to the calculated water transfer coefficient based on a preset water transfer coefficient and humidifier attenuation degree relationship mapping table.

The application provides a fuel cell system air path control system and method, which comprises an air compressor, a humidifier, a valve R1, a valve R2, a three-way valve T1 and a valve R3; the air compressor is connected with the valve R1 and the first inlet of the humidifier through pipelines; the first outlet of the humidifier and the air inlet of the fuel cell are provided with the valve R2; the air outlet of the fuel cell is connected with the three-way valve T1 and the valve R3 through pipelines in sequence; and the valve R3 and the valve R1 are jointly connected to an exhaust port. The application can monitor the parameters of the air entering the fuel cell in real time through relevant sensors, adjust the corresponding electric valves to achieve the effect of controlling the parameters of the air inlet of the fuel cell and realize more fuel cell system air path control strategies.