CN114914482A - Self-adjusting electronic back pressure valve, fuel cell system and control method - Google Patents
Self-adjusting electronic back pressure valve, fuel cell system and control method Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a self-adjusting electronic back pressure valve, a fuel cell system and a control method, wherein the back pressure valve comprises a back pressure valve body, the back pressure valve body comprises a back pressure valve controller, a motor, a valve body and a valve core diaphragm, and the back pressure valve controller comprises a communication power supply module, a pressure acquisition module, a position acquisition module, a driving module and an operation control module; the operation control module receives data output by the communication power supply module, the pressure acquisition module and the position acquisition module, the operation control module compares and analyzes a pressure value instruction sent by external equipment and a pressure value signal of an acquired external air flow channel, after analysis and operation, the operation control module outputs a rotation instruction signal to the driving module, and the driving module drives the motor to control the opening of the valve core diaphragm, so that the adjustment of the opening of the back pressure valve body is realized.
Description
The technical field is as follows:
the invention relates to a self-adjusting electronic back pressure valve, a fuel cell system and a control method.
Background art:
in medium (or high) pressure PEMFC systems, on the one hand, high operating pressures increase the power density of the fuel cell stack; on the other hand, equipment that provides high pressure air, such as a compressor, may consume more power than the blower of the low voltage stack, thereby increasing auxiliary system power consumption of the fuel cell engine system. For an air compressor system, a plurality of back pressure pressures can be corresponded under the same flow and rotating speed, so that different system efficiencies can be generated. Therefore, the air system needs to be controlled in real time to achieve the optimal rotating speed and back pressure of the air compressor at different working condition points, so that the power consumption of the auxiliary system can be greatly reduced, and the service life of the electric pile can be prolonged (the service life of the electric pile can be greatly reduced under the condition of insufficient air supply).
At present, a traditional backpressure valve controller receives an engine ECU instruction, outputs a corresponding control signal to a motor driving signal, and combines position feedback information of a valve to rotate the valve to a corresponding angle, which is referred to as a vehicle-mounted fuel cell engine backpressure control system with patent number CN201310145316.5, and the patent has the following technical problems:
1) the backpressure regulation and control needs to acquire data through a fuel cell system controller FCU and calculate a valve rotation instruction, the control chain length is long and complex, so that the backpressure valve is slow in response, the opening of the regulation and control valve is delayed, and the stable operation of a fuel cell system is not facilitated;
2) the back pressure valves with different calibers and styles need to be calibrated independently aiming at the same fuel cell system, are not friendly to the compatible development of the components of the fuel cell system and have high development cost.
The invention content is as follows:
the invention aims to provide a self-adjusting electronic back pressure valve, which can solve the technical problems that back pressure regulation and control in the prior art need to acquire data and calculate a valve rotation instruction through a fuel cell system controller (FCU), the back pressure valve is slow in response due to long and complex control chain, the opening of the regulation and control valve is delayed, and stable operation of a fuel cell system is not facilitated.
The invention further aims to provide a fuel cell system which can solve the technical problems that back pressure valves with different calibers and styles in the prior art need to be calibrated independently aiming at the same fuel cell system, are not friendly to the compatible development of parts of the fuel cell system and have high development cost
The third objective of the present invention is to provide a control method for controlling a fuel cell, which solves the technical problems of slow response of a back pressure valve and delayed opening of a control valve due to complicated control chain length, which are not favorable for stable operation of a fuel cell system.
The purpose of the invention is realized by the following technical scheme.
The invention aims to provide a self-adjusting electronic back pressure valve, which is characterized in that: including the back pressure valve body, the back pressure valve body includes back pressure valve controller, motor, valve body and case diaphragm, and the case diaphragm is installed in the valve body the inside, realizes opening or closing of back pressure valve body through opening and shutting of case diaphragm, wherein:
the back pressure valve controller comprises a communication power supply module, a pressure acquisition module, a position acquisition module, a driving module and an operation control module;
the motor is arranged on the valve body and used for controlling the opening degree of the valve core diaphragm;
the communication power supply module is used for establishing connection communication between the operation control module and external equipment, and the operation control module receives a pressure value instruction sent by the external equipment through the communication power supply module;
the pressure acquisition module is mainly used for acquiring a pressure value signal of an external air flow channel and transmitting the acquired pressure value signal to the operation control module;
the position acquisition module is mainly used for acquiring the staying position of the valve core diaphragm at any time as a reference of the rotation direction and angle of the driving motor and feeding back the acquired position signal to the operation control module;
the driving module is used for driving the motor to rotate forwards or reversely and rotate by an angle, and controlling the opening of the valve core diaphragm, so that the pressure value of the external air flow channel is adjusted, and the pressure value of the external air flow channel is equal to a pressure value instruction sent by external equipment;
the operation control module receives data output by the communication power supply module, the pressure acquisition module and the position acquisition module, the operation control module compares and analyzes a pressure value instruction sent by external equipment and a pressure value signal of an external air flow channel, after analysis and operation, the operation control module outputs a rotation instruction signal to the driving module, the driving module drives the motor to control the opening of the valve core diaphragm, and therefore adjustment of the opening of the back pressure valve body is achieved
The pressure acquisition module is also connected with a pressure sensor, and the pressure sensor is arranged in the external air flow channel and acquires a pressure value signal of the external air flow channel.
The driving module comprises an electronic switch tube Q1, an electronic switch tube Q2, an electronic switch tube Q3 and an electronic switch tube Q4, wherein the electronic switch tube Q1 and the electronic switch tube Q2 form a first bridge arm, the electronic switch tube Q3 and the electronic switch tube Q4 form a second bridge arm, the electronic switch tube Q1 and the electronic switch tube Q2 are electrically connected with one terminal A of the motor, the electronic switch tube Q3 and the electronic switch tube Q4 are electrically connected with the other terminal B of the motor, and control ends of the electronic switch tube Q1, the electronic switch tube Q2, the electronic switch tube Q3 and the electronic switch tube Q4 are electrically connected with the operation control module.
The motor is a stepping motor or a servo motor.
The operation control module is a single chip microcomputer MCU, and the electronic switch tube Q1, the electronic switch tube Q2, the electronic switch tube Q3 and the electronic switch tube Q4 adopt MOS tubes.
The utility model provides a fuel cell system, including the air supply system, the cooling system, the hydrogen supply system, the pile module, fuel cell system controller FCU and self-interacting electron back pressure valve, the air supply system includes air cleaner, the flowmeter, the air compressor machine, intercooler and humidifier, outside air passes through air cleaner in proper order, the flowmeter, the air compressor machine, intercooler and humidifier, then send the air inlet of pile module, tail exhaust gas that discharges from the air outlet of pile module passes through the humidifier humidification again and handles, discharge behind the self-interacting electron back pressure valve of flowing through, its characterized in that: the self-adjusting electronic back pressure valve is the self-adjusting electronic back pressure valve.
The communication power supply module of the back pressure valve controller is connected with and communicated with the fuel cell system controller FCU, the fuel cell system controller FCU controls the rotating speed of the air compressor to adjust the conveying capacity of the air compressor according to signals sent by the flow meter, the fuel cell system controller FCU sends a pressure value instruction to the communication power supply module according to the conveying capacity of the air compressor, and the communication power supply module transmits the pressure value instruction to the operation control module;
the pressure sensor that the pressure acquisition module of backpressure valve controller is connected sets up in the air entrance of galvanic pile module, and pressure acquisition module gathers the pressure value that gets into the air entrance of galvanic pile module through pressure sensor, and the pressure acquisition module sends the operation control module with the pressure value signal of gathering.
The fuel cell system controller FCU sends out the pressure value instruction and is P0, the pressure value of the air entrance of galvanic pile module is P1, the operation control module is for P0 and the pressure value of the air entrance of galvanic pile module is P1 according to the fuel cell system controller FCU sends out the pressure value instruction and does the contrastive analysis, after the analysis operation, the operation control module outputs and rotates the command signal to the drive module, the drive module drive motor control case diaphragm aperture, thereby realize the regulation of backpressure valve body aperture.
When the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU, and the pressure value command is P0 greater than 0, the backpressure valve controller gives a driving motor rotation command, the motor controls the valve core diaphragm to increase the opening degree of the backpressure valve body, and meanwhile, the position acquisition module acquires the position of the valve core diaphragm and feeds the acquired position signal back to the operation control module to ensure that the motor rotates normally;
when the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU, and the pressure value command is P0 and is smaller than 0, the backpressure valve controller gives a driving motor rotation command, the motor drives the valve core to rotate, the opening degree of the backpressure valve body is reduced, meanwhile, the position acquisition module acquires the position of the valve core diaphragm, the acquired position signal is fed back to the operation control module, and the motor is ensured to rotate normally.
When the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU, and P0 is equal to 0, the opening degree of the backpressure valve body meets the requirement, the backpressure valve controller gives a command of stopping driving the motor until the next target pressure value sent by the fuel cell system controller FCU gives a new target pressure command.
A control method of a fuel cell system, characterized in that: with the fuel cell system described above, the control method includes the steps of:
step 1: inputting a pressure value P1 at an air inlet of the stack module and sending a pressure value instruction P0 by the fuel cell system controller FCU;
step 2: judging whether the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU is P0 greater than 0; if yes, the backpressure valve controller gives a driving motor rotation instruction, the motor controls the valve core diaphragm, the opening degree of the backpressure valve body is increased, meanwhile, the position acquisition module acquires the position of the valve core diaphragm, the acquired position signal is fed back to the operation control module, the motor is ensured to rotate normally, and then the step 3 is carried out; if not, the backpressure valve controller gives a driving motor rotation instruction, the motor controls the valve core diaphragm to reduce the opening degree of the backpressure valve body, meanwhile, the position acquisition module acquires the position of the valve core diaphragm and feeds back the acquired position signal to the operation control module to ensure that the motor rotates normally, and then the step 3 is carried out.
And step 3: judging whether the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU is P0 equal to 0 or not; if so, the back pressure valve controller gives an instruction for stopping the driving motor until a new target pressure instruction is given by a target pressure value sent by the fuel cell system controller FCU next time; if not, returning to the step 2.
Compared with the prior art, the invention has the following effects:
1) the invention discloses a self-adjusting electronic back pressure valve, which comprises a back pressure valve body, wherein the back pressure valve body comprises a back pressure valve controller, a motor, a valve body and a valve core diaphragm, the valve core diaphragm is arranged in the valve body, and the back pressure valve body is opened or closed through the opening and closing of the valve core diaphragm, wherein: the back pressure valve controller comprises a communication power supply module, a pressure acquisition module, a position acquisition module, a driving module and an operation control module; the operation control module is used for receiving data output by the communication power supply module, the pressure acquisition module and the position acquisition module, the operation control module compares and analyzes a pressure value instruction sent by an external device and a pressure value signal of an acquired external air flow channel, after analysis and operation, the operation control module outputs a rotation instruction signal to the driving module, the driving module drives the motor to control the opening of the valve core diaphragm, so that the opening of the back pressure valve body is adjusted, the self-adjusting back pressure valve receives target pressure, the acquired actual pressure of the external air flow channel comes from the opening of the adjusting valve, the control strategy for simplifying the fuel cell system is provided, the response time of the back pressure valve body is short, self fault feedback and other advantages are achieved, the structural arrangement is reasonable, the compatibility is good, and great help is provided for stable and reliable operation of the fuel cell system.
2) The invention discloses a fuel cell system, which comprises an air supply system, a cooling system, a hydrogen supply system, a pile module, a fuel cell system controller FCU and a self-adjusting electronic back pressure valve, wherein the air supply system comprises an air filter, a flow meter, an air compressor, an intercooler and a humidifier, external air sequentially passes through the air filter, the flow meter, the air compressor, the intercooler and the humidifier and then is sent to an air inlet of the pile module, tail exhaust gas discharged from an air outlet of the pile module is humidified by the humidifier again and then is discharged after flowing through the self-adjusting electronic back pressure valve, and the fuel cell system is characterized in that: the self-adjusting electronic back pressure valve is the self-adjusting electronic back pressure valve, after the target pressure of each working condition point is calibrated by the fuel cell system, self-adjusting back pressure valves of different manufacturers, calibers and batches can be selected and switched at any time without independently calibrating the valves again, so that the system development efficiency is greatly improved, and the cost is low.
3) The control method of the fuel cell system is simple and reliable in control, easy to realize and low in implementation cost, ensures the requirements of pressure and flow of the air passage of the fuel cell system, enables the fuel cell system to normally operate and saves energy.
4) Other advantages of the present invention are described in detail in the examples section.
Description of the drawings:
FIG. 1 is a schematic diagram of a back pressure valve body according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a back pressure valve body, a pressure sensor and an external device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a driving module according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a fuel cell system according to a second embodiment of the present invention;
fig. 5 is a flowchart provided by the third embodiment of the present invention.
The specific implementation mode is as follows:
the present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.
As shown in fig. 1 to 3, the present embodiment provides a self-adjusting electronic back pressure valve, which includes a back pressure valve body, the back pressure valve body includes a back pressure valve controller, a motor, a valve body and a valve core diaphragm, the valve core diaphragm is installed inside the valve body, and the opening or closing of the back pressure valve body is realized through the opening and closing of the valve core diaphragm, wherein:
the back pressure valve controller comprises a communication power supply module, a pressure acquisition module, a position acquisition module, a driving module and an operation control module;
the motor is arranged on the valve body and used for controlling the opening degree of the valve core diaphragm;
the communication power supply module is used for establishing connection communication between the operation control module and external equipment, and the operation control module receives a pressure value instruction sent by the external equipment through the communication power supply module;
the pressure acquisition module is mainly used for acquiring a pressure value signal of an external air flow channel and transmitting the acquired pressure value signal to the operation control module;
the position acquisition module is mainly used for acquiring the staying position of the valve core diaphragm at any time as a reference of the rotation direction and angle of the driving motor and feeding back the acquired position signal to the operation control module;
the driving module is used for driving the motor to rotate forwards or reversely and rotate by an angle, and controlling the opening of the valve core diaphragm, so that the pressure value of the external air flow channel is adjusted, and the pressure value of the external air flow channel is equal to a pressure value instruction sent by external equipment;
the operation control module receives data output by the communication power supply module, the pressure acquisition module and the position acquisition module, the operation control module compares and analyzes a pressure value instruction sent by external equipment and a pressure value signal of an acquired external air flow channel, after analysis and operation, the operation control module outputs a rotation instruction signal to the driving module, and the driving module drives the motor to control the opening of the valve core diaphragm, so that the adjustment of the opening of the back pressure valve body is realized. The self-adjusting back pressure valve receives target pressure, collects the actual pressure of an external air flow channel and comes from the opening of the self-adjusting valve, has the control strategy of simplifying a fuel cell system, has the advantages of short response time of the back pressure valve body, self fault feedback and the like, is reasonable in structural arrangement, simple to control, good in compatibility and greatly helpful for stable and reliable operation of the fuel cell system. In the figure, M represents a motor.
The pressure acquisition module is further connected with a pressure sensor, the pressure sensor is installed in the external air flow channel and used for acquiring a pressure value signal of the external air flow channel, the structural arrangement is reasonable, and the pressure sensor is arranged to facilitate acquisition of the pressure value of the external air flow channel.
The driving module comprises an electronic switching tube Q1, an electronic switching tube Q2, an electronic switching tube Q3 and an electronic switching tube Q4, wherein the electronic switching tube Q1 and the electronic switching tube Q2 form a first bridge arm, the electronic switching tube Q3 and the electronic switching tube Q4 form a second bridge arm, the electronic switching tube Q1 and the electronic switching tube Q2 are electrically connected with one terminal A of the motor, the electronic switching tube Q3 and the electronic switching tube Q4 are electrically connected with the other terminal B of the motor, and the control ends of the electronic switching tube Q1, the electronic switching tube Q2, the electronic switching tube Q3 and the electronic switching tube Q4 are electrically connected with the arithmetic control module.
The motor is a stepping motor or a servo motor.
The operation control module is a single chip microcomputer MCU, and the electronic switch tube Q1, the electronic switch tube Q2, the electronic switch tube Q3 and the electronic switch tube Q4 adopt MOS tubes.
The second embodiment:
as shown in fig. 1, 2 and 4, a fuel cell system includes an air supply system, a cooling system, a hydrogen supply system, a stack module, a fuel cell system controller FCU and a self-regulating electronic back pressure valve, the air supply system includes an air filter, a flow meter, an air compressor, an intercooler and a humidifier, external air passes through the air filter, the flow meter, the air compressor, the intercooler and the humidifier in sequence, and then is sent to an air inlet of the stack module, tail exhaust gas discharged from an air outlet of the stack module passes through humidification processing of the humidifier again, and is discharged after passing through the self-regulating electronic back pressure valve, and the fuel cell system is characterized in that: the self-adjusting electronic back pressure valve is the self-adjusting electronic back pressure valve in the first embodiment, after the target pressure of each working condition point is calibrated by the fuel cell system, the self-adjusting back pressure valves of different manufacturers, calibers and batches can be selected and switched at any time without calibrating the valves independently, so that the system development efficiency is greatly improved, and the cost is low.
The communication power supply module of the back pressure valve controller is connected with and communicated with the fuel cell system controller FCU, the fuel cell system controller FCU controls the rotating speed of the air compressor to adjust the conveying capacity of the air compressor according to signals sent by the flow meter, the fuel cell system controller FCU sends a pressure value instruction to the communication power supply module according to the conveying capacity of the air compressor, and the communication power supply module transmits the pressure value instruction to the operation control module;
the pressure sensor that the pressure acquisition module of backpressure valve controller is connected sets up in the air entrance of galvanic pile module, and pressure acquisition module gathers the pressure value that gets into the air entrance of galvanic pile module through pressure sensor, and the pressure acquisition module sends the operation control module with the pressure value signal of gathering.
The fuel cell system controller FCU sends a pressure value command of P0, the pressure value at the air inlet of the electric pile module is P1, the operation control module sends a pressure value command of P0 according to the fuel cell system controller FCU and carries out comparison analysis with the pressure value at the air inlet of the electric pile module of P1, after analysis and operation, the operation control module outputs a rotation command signal to the driving module, and the driving module drives the motor to control the opening degree of the valve core diaphragm, so that the adjustment of the opening degree of the back pressure valve body is realized.
When the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU, and the pressure value command is P0 greater than 0, the backpressure valve controller gives a driving motor rotation command, the motor controls the valve core diaphragm to increase the opening degree of the backpressure valve body, meanwhile, the position acquisition module acquires the position of the valve core diaphragm and feeds back the acquired position signal to the operation control module to ensure that the motor rotates normally;
when the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU, and the pressure value command is P0 and is smaller than 0, the backpressure valve controller gives a driving motor rotation command, the motor drives the valve core to rotate, the opening degree of the backpressure valve body is reduced, meanwhile, the position acquisition module acquires the position of the valve core diaphragm, the acquired position signal is fed back to the operation control module, and the motor is ensured to rotate normally.
When the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU, and P0 is equal to 0, the opening degree of the backpressure valve body meets the requirement, the backpressure valve controller gives a command of stopping driving the motor until the next target pressure value sent by the fuel cell system controller FCU gives a new target pressure command.
Example three:
as shown in fig. 5, a control method of a fuel cell system is characterized in that: with the fuel cell system according to the second embodiment, the control method includes the steps of:
step 1: inputting a pressure value P1 at an air inlet of the stack module and giving a pressure value instruction P0 by a fuel cell system controller FCU;
step 2: judging whether the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU is P0 greater than 0 or not; if yes, the backpressure valve controller gives a driving motor rotation instruction, the motor controls the valve core diaphragm, the opening degree of the backpressure valve body is increased, meanwhile, the position acquisition module acquires the position of the valve core diaphragm, the acquired position signal is fed back to the operation control module, the motor is ensured to rotate normally, and then the step 3 is carried out; if not, the backpressure valve controller gives a driving motor rotation instruction, the motor controls the valve core diaphragm to reduce the opening degree of the backpressure valve body, meanwhile, the position acquisition module acquires the position of the valve core diaphragm, the acquired position signal is fed back to the operation control module to ensure that the motor rotates normally, and then the step 3 is carried out.
And step 3: judging whether the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU is P0 equal to 0 or not; if so, the back pressure valve controller gives an instruction for stopping the driving motor until a new target pressure instruction is given by a target pressure value sent by the fuel cell system controller FCU next time; if not, returning to the step 2.
The control method is simple and reliable, easy to realize, low in realization cost, and capable of ensuring the requirements of pressure and flow of the air channel of the fuel cell system, enabling the fuel cell system to normally operate and saving energy.
The above embodiments are only preferred embodiments of the present invention, but the present invention is not limited thereto, and any other changes, modifications, substitutions, combinations, simplifications, which are made without departing from the spirit and principle of the present invention, are all equivalent replacements within the protection scope of the present invention.
Claims (10)
1. Self-interacting electron back pressure valve, its characterized in that: including the back pressure valve body, the back pressure valve body includes back pressure valve controller, motor, valve body and case diaphragm, and the case diaphragm is installed in the valve body the inside, realizes opening or closing of back pressure valve body through opening and shutting of case diaphragm, wherein:
the back pressure valve controller comprises a communication power supply module, a pressure acquisition module, a position acquisition module, a driving module and an operation control module;
the motor is arranged on the valve body and used for controlling the opening degree of the valve core diaphragm;
the communication power supply module is used for establishing connection communication between the operation control module and external equipment, and the operation control module receives a pressure value instruction sent by the external equipment through the communication power supply module;
the pressure acquisition module is mainly used for acquiring a pressure value signal of an external air flow channel and transmitting the acquired pressure value signal to the operation control module;
the position acquisition module is mainly used for acquiring the staying position of the valve core diaphragm at any time as a reference of the rotation direction and angle of the driving motor and feeding back the acquired position signal to the operation control module;
the driving module is used for driving the motor to rotate forwards or reversely and rotate by an angle, and controlling the opening of the valve core diaphragm, so that the pressure value of the external air flow channel is adjusted, and the pressure value of the external air flow channel is equal to a pressure value instruction sent by external equipment;
the operation control module receives data output by the communication power supply module, the pressure acquisition module and the position acquisition module, the operation control module compares and analyzes a pressure value instruction sent by external equipment and a pressure value signal of an acquired external air flow channel, after analysis and operation, the operation control module outputs a rotation instruction signal to the driving module, and the driving module drives the motor to control the opening of the valve core diaphragm, so that the adjustment of the opening of the back pressure valve body is realized.
2. The self-regulating electronic back pressure valve of claim 1, wherein: the pressure acquisition module is also connected with a pressure sensor, and the pressure sensor is arranged in the external air flow channel and acquires a pressure value signal of the external air flow channel.
3. The self-regulating electronic back pressure valve of claim 1, wherein: the driving module comprises an electronic switching tube Q1, an electronic switching tube Q2, an electronic switching tube Q3 and an electronic switching tube Q4, the electronic switching tube Q1 and the electronic switching tube Q2 form a first bridge arm, the electronic switching tube Q3 and the electronic switching tube Q4 form a second bridge arm, the electronic switching tube Q1 and the electronic switching tube Q2 are electrically connected with one terminal A of the motor, the electronic switching tube Q3 and the electronic switching tube Q4 are electrically connected with the other terminal B of the motor, and the control ends of the electronic switching tube Q1, the electronic switching tube Q2, the electronic switching tube Q3 and the electronic switching tube Q4 are electrically connected with the operation control module.
4. The self-regulating electronic back pressure valve of claim 3, wherein: the motor is a stepper motor or a servo motor.
5. Self-adjusting electronic back-pressure valve according to claim 1 or 2 or 3 or 4, characterized in that: the operation control module is a single chip microcomputer MCU, and the electronic switch tube Q1, the electronic switch tube Q2, the electronic switch tube Q3 and the electronic switch tube Q4 adopt MOS tubes.
6. The utility model provides a fuel cell system, including the air supply system, the cooling system, the hydrogen supply system, the pile module, fuel cell system controller FCU and self-interacting electron back pressure valve, the air supply system includes air cleaner, the flowmeter, the air compressor machine, intercooler and humidifier, outside air passes through air cleaner in proper order, the flowmeter, the air compressor machine, intercooler and humidifier, then send the air inlet of pile module, tail exhaust gas that discharges from the air outlet of pile module passes through the humidifier humidification again and handles, discharge after the back pressure valve flows through, its characterized in that: the back pressure valve is a self-adjusting electronic back pressure valve as claimed in any one of the above claims 1 to 5.
7. A fuel cell system according to claim 6, wherein:
the communication power supply module of the back pressure valve controller is connected with and communicated with the fuel cell system controller FCU, the fuel cell system controller FCU controls the rotating speed of the air compressor to adjust the conveying capacity of the air compressor according to signals sent by the flow meter, the fuel cell system controller FCU sends a pressure value instruction to the communication power supply module according to the conveying capacity of the air compressor, and the communication power supply module transmits the pressure value instruction to the operation control module;
the pressure sensor that the pressure acquisition module of backpressure valve controller is connected sets up in the air entrance of galvanic pile module, and pressure acquisition module gathers the pressure value that gets into the air entrance of galvanic pile module through pressure sensor, and the pressure acquisition module sends the operation control module with the pressure value signal of gathering.
8. A fuel cell system according to claim 7, wherein: the fuel cell system controller FCU sends out the pressure value instruction and is P0, the pressure value of the air entrance of galvanic pile module is P1, the operation control module is for P0 and the pressure value of the air entrance of galvanic pile module is P1 according to the fuel cell system controller FCU sends out the pressure value instruction and does the contrastive analysis, after the analysis operation, the operation control module outputs and rotates command signal to drive module, drive module driving motor control case diaphragm aperture, thereby realize the regulation of backpressure valve body aperture.
9. A fuel cell system according to claim 8, wherein:
when the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU, and the pressure value command is P0 greater than 0, the backpressure valve controller gives a driving motor rotation command, the motor controls the valve core diaphragm to increase the opening degree of the backpressure valve body, meanwhile, the position acquisition module acquires the position of the valve core diaphragm and feeds back the acquired position signal to the operation control module to ensure that the motor rotates normally;
when the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU, and the pressure value command is P0 and is smaller than 0, the backpressure valve controller gives a driving motor rotation command, the motor drives the valve core to rotate, the opening degree of the backpressure valve body is reduced, meanwhile, the position acquisition module acquires the position of the valve core diaphragm, the acquired position signal is fed back to the operation control module, and the motor is ensured to rotate normally.
When the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU, and P0 is equal to 0, the opening degree of the backpressure valve body meets the requirement, the backpressure valve controller gives a command of stopping driving the motor until the next target pressure value sent by the fuel cell system controller FCU gives a new target pressure command.
10. A control method of a fuel cell system, characterized in that: with the fuel cell system according to any one of claim 6 to claim 9, the control method includes the steps of:
step 1: inputting a pressure value P1 at an air inlet of the stack module and sending a pressure value instruction P0 by the fuel cell system controller FCU;
step 2: judging whether the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU is P0 greater than 0 or not; if yes, the backpressure valve controller gives a driving motor rotation instruction, the motor controls the valve core diaphragm, the opening degree of the backpressure valve body is increased, meanwhile, the position acquisition module acquires the position of the valve core diaphragm, the acquired position signal is fed back to the operation control module, the motor is ensured to rotate normally, and then the step 3 is carried out; if not, the backpressure valve controller gives a driving motor rotation instruction, the motor controls the valve core diaphragm to reduce the opening degree of the backpressure valve body, meanwhile, the position acquisition module acquires the position of the valve core diaphragm, the acquired position signal is fed back to the operation control module to ensure that the motor rotates normally, and then the step 3 is carried out.
And step 3: judging whether the pressure value at the air inlet of the stack module is P1 minus the pressure value command sent by the fuel cell system controller FCU is P0 equal to 0 or not; if so, the back pressure valve controller gives an instruction for stopping the driving motor until a new target pressure instruction is given by a target pressure value sent by the fuel cell system controller FCU next time; if not, returning to the step 2.
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| JP2006092855A (en) * | 2004-09-22 | 2006-04-06 | Chino Corp | Back pressure valve controller for fuel cell |
| CN203147014U (en) * | 2012-12-17 | 2013-08-21 | 卓旦春 | Intelligent valve |
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