33 results about "Humistor" patented technology

The invention belongs to the technical field of vehicle battery heat dissipation, and discloses an automobile fuel cell cold start control system and method, and the system comprises an air compressor, an intercooler, a humidifier, a fuel cell stack, a water pump, a three-way control valve, a heater, a radiator, a throttle valve, a first valve, a second valve, a third valve, and a controller. An air heating path is formed by the air compressor, the intercooler, the humidifier, the fuel cell stack, the humidifier and the throttle valve; the water pump, three-way control valve, the heater, the intercooler, the second valve, the fuel cell stack, and the water pump form a cooling liquid heating loop; the water pump, the three-way valve, the radiator, the third valve, the fuel cell stack, and the water pump forms a first cooling liquid radiating loop; the water pump, the three-way control valve, the radiator, the first valve, and the water pump form a second cooling liquid radiating loop. Under a low-temperature condition, the fuel cell can be rapidly started under the low-temperature condition; under the condition of high temperature, the intercooler and the fuel cell stack are cooled by one radiator.

The invention relates to a fuel cell system and a control method thereof. The system comprises a galvanic pile, a hydrogen loop, an air loop, a cooling loop, a control module and an environment monitoring module, the hydrogen loop, the air loop and the cooling loop are all connected with the galvanic pile, and the control module receives information of each loop and the environment monitoring module, and regulates and controls each loop through calculation; the air loop comprises an air inlet pipeline, an air compressor, a cathode flow control module, a humidifier, a throttle valve and an exhaust pipeline, the air inlet pipeline, the air compressor, the humidifier and the inlet end of the galvanic pile are sequentially connected through pipelines, and the outlet end of the galvanic pile issequentially communicated with the humidifier, the throttle valve and the exhaust pipeline. And the cooling loop comprises a second pressure controller, a heater, a multi-module heat dissipation module and a flow control module. The defects in a common fuel cell are overcome, and the adaptive capacity of the system for different environments is improved.

The invention discloses a method for controlling an air intake humidifying amount of a fuel cell automobile. The method comprises the following steps of: (1) starting a fuel cell system, if the fuel cell system is started at normal temperature, entering a step (2), if the fuel cell system is started at low temperature, enabling a humidifier not to carry out humidification, and using dry air for carrying out low-temperature starting-up purging on a galvanic pile until a normal-temperature starting-up condition is met; (2) calculating a humidifying basic amount and a humidifying compensation amount, adding the humidifying basic amount and the humidifying compensation amount to obtain an actual air inlet humidifying amount, comparing the actual air inlet humidifying amount with a permitted maximum humidifying amount of the humidifier, taking a smaller value to obtain an actual humidifying amount, and controlling the humidifier; and (3) judging whether the required power of a fuel cell is greater than 0 or not in real time, if so, circularly executing the steps (1) and (2) to automatically adjust the air intake humidifying amount, and if not, entering a shutdown process. Whether the stack needs to be humidified and the humidifying amount are controlled by identifying the environment temperature, the air in-stack temperature, the stack alternating current impedance and the accelerator pedal, so that the fuel cell stack is purged by using dry air without humidifying the in-stack air under the low-temperature starting working condition, the purging time is short, and the fuel utilization rate is high.

The invention provides a fuel cell cathode side humidity adjustment control system and method. The relative humidity condition of the cathode of the cell stack is rapidly and accurately obtained through the voltage change rule of the fuel cell, and compared with an existing humidity sensor feedback control method, the method is higher in control sensitivity and is remarkably improved in detectionaccuracy, and can reduce the loss of the fuel cell caused by dry film and water plugging phenomena. According to the invention, the water vapor content at the cathode of the fuel cell can be controlled within a certain range, so that the working efficiency of the fuel cell is improved. According to the invention, a gas guiding and switching assembly is used for intelligently adjusting the communication relationship between a low-position connection port of a cathode chamber of the cell stack and an automatic discharge assembly and a humidifier, so that air with high air relative humidity can be fed into a cathode chamber through a high-position connecting port by matching with the humidifier, and the working efficiency of the fuel cell is improved by properly improving the water vapor content of the cathode chamber.

The invention discloses a testing device for a fuel cell air system. The testing device comprises an air compressor, an intercooler, an electronic throttle valve, a humidifier, a cooling device and asystem controller, and further comprises an acquisition module which is electrically connected with the system controller and is used for acquiring data, wherein the acquisition module comprises a first acquisition unit for acquiring air parameters input into the air compressor, a second acquisition unit for acquiring air parameters output by the air compressor, a third acquisition unit for acquiring cooling liquid parameters input into the air compressor, a fourth acquisition unit for acquiring cooling liquid parameters output by the air compressor, a fifth acquisition unit for acquiring cooling liquid parameters input into the intercooler, a sixth acquisition unit for acquiring cooling liquid parameters output by the intercooler, a seventh acquisition unit for acquiring air parameters output by the intercooler and an eighth acquisition unit for acquiring air parameters output by the electronic throttle valve. The testing device is beneficial for improving the accuracy of detecting the performance of a to-be-tested component.

The invention provides a humidifier system for a fuel cell engine and a humidifying method, a high-pressure nozzle (13) is arranged in a humidifier (7), a dry side gas flow channel (14) and a wet side gas flow channel (15) are arranged below the high-pressure nozzle (13), and a one-way valve (10) is arranged in the wet side gas flow channel (15); a filter (1), an air compressor (2) and an intercooler (3) are sequentially connected in the inlet direction of a humidifier (7), an electric pile (8) is arranged in the outlet direction of the humidifier (7), and a condenser (9) is arranged in the backflow direction of the humidifier (7); and the system further comprises a control module and an adjusting module. The humidifying requirement of the fuel cell vehicle under multiple working conditions can be met, the humidity of the galvanic pile under the dynamic working condition is adjusted, the problems of water logging and over-dryness of the galvanic pile under two extreme conditions are effectively solved, heat in liquid water at an outlet of the intercooler is recycled, the additional liquid water storage volume is reduced, and reutilization of the air at the outlet of the electric pile is realized.

The invention provides a fuel cell system, belongs to the technical field of fuel cells, and solves the problems that a humidifier and an electric pile cannot be effectively purged and mechanical damage of a membrane cannot be caused in the prior art. The system comprises an electric pile, an air compressor, a water pump, a heater, a radiator, a humidifier, a three-way valve I and a controller, wherein the air inlet of the electric pile is connected with the air compressor through the humidifier, a cooling liquid inlet is connected with the output end of the three-way valve I, a cooling liquid outlet is connected with the inlet of the water pump, and the outlet of the water pump is connected with the first input end of the three-way valve I through the heater and connected with the second input end of first three-way valve I through the radiator. According to the invention, after a shutdown instruction is received, a controller controls a cooling liquid to be heated through small circulation until the water temperature of a cooling liquid inlet of an electric pile rises to a threshold value, and a heater is turned off; an air compressor is controlled to perform hot purging on the electric pile and a humidifier; and after purging is finished, the cooling liquid is controlled to carry out large circulation for heat dissipation until the water temperature of the cooling liquid inlet is reduced to a set value, and the fuel cell system is closed.

The invention discloses a test system and a test method for a fuel cell ejector. Mainly, a high-pressure gas cylinder is connected with a gas cylinder valve, and the gas cylinder valve is connected with a proportional valve; the proportional valve is connected with a gas inlet of the ejector; an outlet of the ejector is connected with a three-way valve; one outlet of the three-way valve is connected with a gas side inlet of a humidifier; a gas side outlet of the humidifier is connected with a temperature controller; an outlet of the temperature controller is connected with a mixing barrel; theother outlet of the three-way valve is directly connected with the mixing barrel; a discharge outlet of the mixing barrel is connected with a first pressure regulating valve; a backflow outlet of themixing barrel is connected with a second pressure regulating valve; the other end of the second pressure regulating valve is connected with an ejection port of the ejector; a bottom outlet of the mixing barrel is connected with a water pump; and an outlet of the water pump is connected with a water side inlet of the humidifier. Humidity, temperature and pressure conditions of an ejector port andan outlet of the ejector can be quickly established, the use is convenient, the adjustment precision is high, and the experiment conditions are quickly established.

The invention provides a device and method for detecting and controlling leakage of a humidifier of a fuel cell, belongs to the technical field of fuel cell humidifier detection, and solves the problems of inaccurate leakage prediction and incapability of self-adaptive control of a humidifier in the prior art. The device comprises a flow meter, an air compressor, an air inlet throttle valve, an exhaust throttle valve, an electric pile and a controller; the input end of the controller is connected with the output end of the flow meter, and the output end of the controller is respectively connected with the control ends of the air compressor, the air inlet throttle valve, the exhaust throttle valve and the electric pile. The controller is used for performing shutdown purging on the galvanic pile after receiving a humidifier detection instruction, monitoring the real-time high-frequency impedance of the galvanic pile in the purging process until the high-frequency impedance is greater than or equal to a preset threshold value, obtaining the air pressure difference between an air inlet and an air outlet of the galvanic pile when the flow meter is at the target flow, judging whether the humidifier to be detected leaks or not, and if the humidifier to be detected leaks, and correcting the target flow according to the air pressure difference. Online automatic monitoring and self-adaptive control of the humidifier are realized.

The invention discloses a fuel cell system and a vehicle with the same. The fuel cell system comprises an air filter, an air compressor, an intercooler and an electric pile, wherein an outlet of the air filter is communicated with an inlet of the air compressor through a first air pipeline, an outlet of the air compressor is communicated with an inlet of the intercooler through a second air pipeline, an outlet of the intercooler is communicated with an air cavity of the galvanic pile through a third air pipeline, a humidifying device is further comprised, the humidifying device comprises a driving part, a water tank and an atomizing nozzle, the driving part can push the water in the water tank to the atomizing nozzle, and the atomizing nozzle can spray the atomized water vapor into the second air pipeline. The fuel cell system is advantaged in that use of a film humidifier can be avoided through structural improvement, cost is effectively reduced, and system durability is improved.

The invention provides a system and a method for reducing air inflow during idling of a fuel cell, and the system comprises an air filter, an air compressor, an intercooler, a first throttle valve, asecond throttle valve, a humidifier and an FEMC. The first throttle valve is connected with the air compressor in parallel through a bypass pipe, the output end of the air filter is connected with theinput end of the air compressor. The output end of the air compressor is connected with the input end of the intercooler, the output end of the intercooler is connected with the input end of the humidifier, the output end of the humidifier is connected with the input end of the FEMC, and the output end of the FEMC is connected with the input end of the second throttle valve. A pipeline and a throttle valve are additionally arranged in front of an intercooler and an air compressor. Excessive air is shunted before the intercooler, so that the amount of air flowing through the intercooler is reduced, namely the air flowing through the PEMFC is reduced.

The invention discloses a fuel cell stack cathode humidity control system and a control method thereof.The fuel cell stack cathode humidity control system comprises an air source, a stack and a controller, and an air compressor, a first radiator and a humidifier are sequentially arranged between the air source and a stack cathode inlet in the air flow direction; an air supply bypass valve is arranged between the air outlet of the first radiator and the cathode inlet of the electric pile, a second radiator and an exhaust bypass valve which are connected in parallel are arranged between the cathode outlet of the electric pile and the wet side inlet of the humidifier, and the wet side outlet of the humidifier is connected with the outside atmosphere. The controller is used for analyzing the air temperature at the cathode inlet of the electric pile, and the output end of the controller is connected with the air supply bypass valve, the exhaust bypass valve and the second radiator. The air temperature and humidity at the cathode inlet of the electric pile are adjusted by adjusting the air temperature at the wet side inlet of the humidifier, so that the humidity requirement of the electric pile is met.

A humidifier includes a base, a liquid tank detachably connected with the base, an automizer element is arranged at a bottom of the liquid tank; and a circuit board is arranged inside the base. When the liquid tank is connected with the base, the automizer element is electrically connected with the circuit board, and when the liquid tank is separated from the base, the automizer element is disconnected with the circuit board.

The invention discloses a fuel cell system and a purging method of the fuel cell system.According to the purging method of the fuel cell system, the purging steps of a cell stack and a humidifier are controlled according to the relationship between the environment temperature and the freezing temperature of the humidifier. Specifically, when T is larger than T1, air passes through the humidifier and the cell stack, and the cell stack and the humidifier are purged at the same time until X is larger than X1; and when T is less than or equal to T1, firstly the cell stack and the humidifier are purged until X is greater than X2, and then the humidifier is independently purged until delta y is less than delta y1. According to the method of the invention, the content of moisture in the cell stack is quantified as the difference between the internal resistance of the cell stack and the calibrated internal resistance of the cell stack and the content of moisture in the humidifier is quantified as the difference between the air humidity of the first inlet of the humidifier and the air humidity of the second outlet of the humidifier and the difference between the the air humidity of the first inlet of the humidifier and the calibrated value of the difference between air humidity of the humidifier, and thus, the moisture content in the cell stack and the humidifier is ensured to reach the moisture content capable of preventing icing.

The invention provides a fuel cell air system and a control method thereof, the system comprises an air compressor, an intercooler, a humidifier, a fuel cell stack, a water diversion structure and an expansion machine, a motor and a clutch are arranged between the air compressor and the expansion machine, and a three-way valve is arranged on an air inlet pipeline. The fuel cell air system controls the three-way valve and the electromagnetic clutch according to the monitored temperature of the expansion machine in the operation process, so that the fuel cell air system can effectively avoid starting failure caused by clamping stagnation of the expansion machine under the low-temperature condition, especially under the low-temperature cold starting condition; and the reliability and the application range of the fuel cell system are effectively expanded.

The invention relates to a cathode loop of a fuel cell system and a control method of the cathode loop. The cathode loop comprises an air inlet pipe, an air compressor, a humidifier, an electric pile, a throttle valve, an exhaust pipe and a controller, wherein the air inlet pipe, the air compressor, the humidifier and the inlet end of the electric pile are sequentially connected through a cathode inlet pipeline, and the outlet end of the electric pile is sequentially connected with the humidifier and the throttle valve through a cathode outlet pipeline and then is connected to the exhaust pipe together with a hydrogen exhaust pipe of the electric pile. The cathode pipeline is further connected with a cathode flow control module, the cathode flow control module is communicated with the air compressor, the electric pile, the humidifier and the exhaust pipe, the cathode flow control module is normally communicated with the air compressor, and the opening degree of the cathode flow control module communicated with the electric pile, the humidifier and the exhaust pipe is controlled through a controller. According to the invention, the hydrogen concentration in the exhaust gas discharged by the fuel cell can be reduced, and the stack can be closed in the shutdown state of the fuel cell to prevent air from entering the stack; and the humidity and flow of air entering the pile can be controlled.

The invention discloses a wide humidity environment-friendly humidity sensing device and a control method of the wide humidity environment-friendly humidity sensing device. The device comprises a microprocessor and a humidity sensing module, wherein the humidity sensing module is connected with the microprocessor, and comprises a capacitance-type humidity sensing element and a NTC (negative temperature coefficient) temperature measuring unit; and a monobus data transmission manner is adopted in the microprocessor and the humidity sensing module. According to the invention, a new-type humidity sensitive element made of organic polymer material is adopted, has the characteristics of wide humidity sensing range, rapid response and strong anti-pollution ability, no need of heating and cleaning, and stable and reliable performance in long-time use and the like; and except a sensor and a ceramic feed through seat, components contacted with water are stainless steel materials. The wide humidity environment-friendly humidity sensing device provided by the invention has absolute advantages compared with a humistor in the market, and simultaneously, has the characteristics of high cost performance, low energy consumption, better pollution resistance, quick response time, excellent linearity, high reliability and long-time stability, and capability of being used for linear voltage or frequency output, rapidness in dehumidification under long-time saturation and the like.

The present invention is one kind of automatically controlled water spraying device and method. The work circuit of the water spraying device has one control circuit connected through one magnetically sucking switch and controlled with one humistor element. The work circuit contains one magnetically sucking switch, one water pump, and one water sprinkler; and the control circuit contains one electromagnetic relay and one humistor connected serially in the same loop. The present invention has humistor designed based on the conductivity of electrolyte solution, and possesses simple manufacture, sensitive control, low cost and environment friendship.

The invention discloses a humidifier outlet pipe structure, which is applied to a hydrogen fuel cell system. The humidifier outlet pipe structure includes a body, and the body includes an air outlet port, an air inlet port, a pressure reducing valve socket and a ferrule. The air outlet port is set at one end of the body; the air inlet port is set at the other end of the body; the pressure reducing valve socket is set at one end close to the air outlet port, and the pressure reducing valve socket communicates with the inside of the body; the ferrule is sleeved on the air outlet port. The air outlet pipe structure of the humidifier of the present invention, because of the setting of the pressure reducing valve socket, can ensure that the humidified air continuously flows into the air outlet pipe structure of the humidifier without stopping the operation of the air compressor, but at the same time it can Other components such as protective pipelines are ruptured and damaged due to excessive pressure.

The invention discloses a fuel cell auxiliary system and a fast cleaning method for cathodes during shutdown, comprising: an air filter, an air flow meter, an air compressor, an intercooler, an air bypass valve, a humidifier, and a stack air inlet temperature sensor, electric stack empty humidity sensor, air back pressure valve, electric stack, electric stack water outlet temperature sensor, water pump, electric three-way valve, radiator, voltage sensor, AC impedance, current sensor, auxiliary system and shutdown of the present invention The cathodic purging method requires few changes to the system, and the components are simple, which is favorable for integration. When the fuel cell is shut down, the battery stack can be quickly dried up to facilitate the next normal startup, and it can play an important role in the field of fuel cell vehicles.

The invention discloses an air inlet system suitable for low-temperature quick start of a fuel cell, and relates to the technical field of fuel cells. The problem that low-temperature starting is difficult is solved. The system specifically comprises an air filter and an air compressor which are sequentially connected, an air outlet of the air compressor is connected with a first back pressure valve and a second back pressure valve through a tee joint, an air outlet of the first back pressure valve is sequentially connected with an intercooler, a humidifier and a temperature and pressure sensor, and an air outlet of the temperature and pressure sensor is connected to an air inlet of a fuel cell stack. And an air outlet of the back pressure valve II is connected to an air inlet of the temperature and pressure sensor. When the air temperature is low and the fuel cell is difficult to start, the first back pressure valve is closed, the second back pressure valve is opened, and high-temperature and high-pressure gas from the air compressor is directly conveyed into the fuel cell stack for reaction at the moment, so that on one hand, the high-temperature gas acting by the air compressor directly enters the fuel cell stack without being cooled, the initial reaction temperature of oxygen and hydrogen can be increased; and reliable starting of the fuel cell is ensured.

The invention provides a humidifier for a fuel cell system and a debugging and working method of the humidifier. The humidifier is characterized in that a plurality of humidifying membrane assemblies are arranged in the humidifier; the humidifier is provided with a dry air flow channel and a wet air flow channel; the dry gas flow channel and the wet gas flow channel coincide at the humidifying film assembly; a humidity sensor is arranged at the outlet end of the dry gas flow channel; the first guide valve plate is arranged at the inlet end of the dry gas flow channel or the wet gas flow channel; the opening degree of the first guide valve plate is adjusted through the first actuator, the flowing path of the airflow is changed, the contact space of the airflow and the humidification membrane assembly is increased or decreased, and wet airflow and dry airflow conduct moisture exchange through the humidification membrane assembly which is in contact with the first guide valve plate. The flowing path of the air flow can be changed through the arranged first guide valve plate, so that the dry air flow passes through the wetted humidifying film assembly as much as possible, and the humidity of the output dry air flow is finely adjusted under the condition of the same air inflow.

The invention provides a system for reducing the concentration of tail exhaust hydrogen of a fuel cell system. In the system, the output end of an air compressor is connected with the input end of an intercooler, and the output end of the intercooler is connected with the input end of an electronic three-way valve; the first output end and the second output end of the electronic three-way valve are connected with the first input end of a humidifier and the input end of a back pressure valve respectively; the first output end of the humidifier is connected with the input end of a first throttle valve, the output end of the first throttle valve is connected with the input end of an electric pile, and the first output end of the electric pile is connected with the input end of a second throttle valve. The second output end of the electric pile is connected with the input end of a gas-water separator, the output end of the second throttle valve is connected with the second input end of the humidifier, the second output end of the humidifier is connected with the input end of the back pressure valve, and the output end of the back pressure valve and the output end of the gas-water separator are both connected with a silencer. The invention has the effects that the concentration of tail exhaust hydrogen in the fuel cell system is effectively reduced, and the safety of the hydrogen energy automobile is improved.

The invention discloses a fuel cell system and an air humidity adjusting method thereof.The system comprises a main pipeline, a controller, an air processing subsystem and an electric pile operation subsystem, the air processing subsystem and the electric pile operation subsystem are connected with the controller, the electric pile operation subsystem comprises a plurality of electric pile units, and each electric pile unit comprises an inlet valve, an ejector, an electric pile and an outlet valve; the air treatment subsystem is connected with a primary inflow port of the ejector through an inlet valve, an outlet of the ejector is connected with an air inlet of the electric pile, an exhaust port of the electric pile is connected with the input end of the main pipeline, and the output end of the main pipeline is connected with a secondary inflow port of the ejector through an outlet valve. And the ejector is used for fully mixing dry air provided by the air treatment subsystem and wet air provided by the main pipeline so as to adjust the humidity of air entering the electric pile. According to the invention, the ejector is adopted to replace a traditional membrane humidifier, so that the production cost is reduced; and through mutual adjustment among the multiple electric pile units, the service life of the multiple electric piles in the system is prolonged, so that the economic loss is reduced.

The invention relates to the technical field of fuel cells, in particular to a heat exchange humidifying device for a fuel cell, which comprises an intercooler inlet cavity, an intercooler main body is arranged on the top surface of the intercooler inlet cavity, a humidifier main body is arranged on the surface of the intercooler main body, a gas mixing cavity is arranged on the surface of the humidifier main body, and an adapter is arranged on the surface of the gas mixing cavity. The heat exchange humidifying device has the beneficial effects that the heat exchange humidifying device for the fuel cell is small in size and high in integration level; and, through simulation design, the welding angle of the baffle is changed, under the condition that the length of an inlet pipeline of the intercooler is not increased, the uniformity of gas distribution is guaranteed, the intercooler, the humidifier and a throttle valve (or a tee joint) can be integrated at the same time, and the use of pipelines is reduced.

The invention discloses a hydrogen fuel cell air path air flow control device and method. The device comprises a chemical air filter, an electric air compressor, a silencer, an intercooler, a humidifier and an electronic throttle valve which are connected in sequence. The method comprises the following steps of: sending a set rotating speed signal to a compressor controller based on a model control module according to a set fresh air amount and a mass correction coefficient of an I integral module, enabling the compressor controller to send a compressor rotating speed signal to an air inlet system according to the set rotating speed signal, enabling the air inlet system to work according to the compressor rotating speed signal and measure the actual air inlet amount of the air inlet system, and enabling the I integral module to update the mass correction coefficient according to the set fresh air amount and the actual air inlet amount. The device and the method have the advantages thatthe coupling influence of a multiple-input-multiple-output system can be effectively counteracted, the responsiveness and the stability of air flow control are improved, then the power output responsiveness of the fuel cell is improved, the service life of the fuel cell is prolonged, and the control robustness is improved.

The invention provides chip packaging multi-parameter detection equipment, which comprises a detection table, and is characterized in that the detection table is provided with a detection position, and the detection position is used for placing a chip; the pressure detection assembly comprises a pressure regulator, a pressure cover and a pressure sensor; the pressure sensor is arranged in the accommodating cavity and is used for detecting a pressure value in the accommodating cavity; the temperature detection assembly comprises a heating device and a temperature sensor, and the temperature sensor is arranged in the containing cavity and used for detecting the temperature value in the containing cavity; the humidity detection assembly comprises a humidifier and a humidity sensor, and the humidity sensor is arranged in the containing cavity and used for detecting the humidity value in the containing cavity; the central control unit is arranged on the base. According to the method, the chip internal parameters of the chip are tested under the condition of different environment external parameters, so that whether the chip meets the use requirement or not is judged, the detection cost is reduced, the detection period is shortened, and the detection error is reduced.

The invention provides an off-line electric pile activation system for a fuel cell, belongs to the technical field of fuel cells, and solves the problem that an electric pile cannot be efficiently activated under the non-starting condition in the prior art. The device comprises a humidifying and activating device and a controller. Wherein the humidifying and activating device comprises a high-pressure gas storage device, a flow control valve, a humidifier, a gas circulating pump and a back pressure valve which are integrated, and is provided with a mounting groove for placing a galvanic pile to be activated. One path of the gas inlet of the to-be-activated galvanic pile is connected with the gas outlet end of the high-pressure gas storage equipment through the humidifier and the flow control valve in sequence, and the other path is connected with the corresponding gas tail gas outlet through the gas circulating pump. And the controller is used for starting and adjusting the flow control valve, the humidifier and the gas circulating pump to humidify and activate the galvanic pile to be activated. By utilizing the offline activation system, the electric pile can be humidified and activated and the activation effect can be checked when the starting condition is not met, so that the faults that the performance is reduced, the electric pile cannot be started and the like due to the fact that the electric pile is stored for a long time are avoided.

The invention discloses a method for controlling the humidification amount of intake air of a fuel cell vehicle, which includes: (1) starting the fuel cell system, if starting at normal temperature, enter step (2); if starting at low temperature, the humidifier does not perform humidification, Use dry air to purge the stack at low temperature until it reaches the normal temperature start-up condition; (2) Calculate the basic amount of humidification and the compensation amount of humidification, and add the two to obtain the actual intake humidification amount, which is consistent with the humidifier's permission Compare the maximum humidification amount, take the smaller one to get the actual humidification amount, and control the humidifier; (3) judge in real time whether the fuel cell demand power is greater than 0, if so, execute steps (1) and (2) in a loop to increase the intake air The humidity will be automatically adjusted; if not, it will enter the shutdown process. The invention controls whether the stack needs to be humidified and the amount of humidification by identifying the ambient temperature, the temperature of the air entering the stack, the AC impedance of the stack and the accelerator pedal, so that the fuel cell stack can use dry air to The purge of the stack does not humidify the air entering the stack, the purge time is short, and the fuel utilization rate is high.

The invention provides an air control device for a fuel cell, which comprises an air passage device and a passage opening and closing device. The air passage device comprises a plurality of communicated air passages including a first passage, a second passage, a third passage and a fourth passage, wherein the first passage is communicated with an air outlet of an intercooler, the second passage is communicated with an air inlet of a galvanic pile, the third passage is communicated with an air inlet of a humidifier, and the fourth passage is connected with a second end of a back pressure valve. The passage opening and closing device is used for adjusting the opening and closing states of each passage in the air passage device so as to switch the running state of the fuel cell. According to the invention, the air inlet humidity of the galvanic pile can be adjusted in real time, and performance reduction caused by water logging is prevented; the air inlet pressure of a cathode can be adjusted, pressure relief operation is carried out after the pressure exceeds a preset value, and internal damage is avoided; and it can be guaranteed that external air cannot enter the galvanic pile in the shutdown or storage state, the storage state of the galvanic pile is kept, and the recovery performance after long-term storage is improved.