CN111600050A - Multifunctional proton exchange membrane fuel cell test bench - Google Patents
Multifunctional proton exchange membrane fuel cell test bench Download PDFInfo
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- CN111600050A CN111600050A CN202010463414.3A CN202010463414A CN111600050A CN 111600050 A CN111600050 A CN 111600050A CN 202010463414 A CN202010463414 A CN 202010463414A CN 111600050 A CN111600050 A CN 111600050A
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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
- H01M8/04537—Electric variables
- H01M8/04574—Current
- H01M8/04582—Current of the individual fuel cell
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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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
- H01M8/04537—Electric variables
- H01M8/04634—Other electric variables, e.g. resistance or impedance
- H01M8/04641—Other electric variables, e.g. resistance or impedance of the individual fuel cell
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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
- H01M8/04664—Failure or abnormal function
- H01M8/04671—Failure or abnormal function of the individual fuel cell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention relates to a multifunctional proton exchange membrane fuel cell test bench.A air supply module is used for controlling the air flow and the pressure of a fuel cell; the hydrogen supply module is used for controlling the hydrogen flow and pressure of the fuel cell; the humidifying module is used for humidifying the fuel cell inlet air; the heat management module is used for controlling the temperature of a humidifying tank and the cooling liquid of the battery in the humidifying module; an electronic load module for discharging the fuel cell; the electrochemical impedance module is used for acquiring an electrochemical impedance spectrum of the fuel cell; the subarea test module is used for acquiring the current density and the temperature distribution of the fuel cell; and the integrated control module is used for controlling the fuel cell rack, acquiring data, analyzing and processing, alarming and protecting and carrying out wireless communication. The embodiment of the invention has the functions of basic gas supply, temperature control, voltage monitoring and the like, and also has the functions of obtaining electrochemical impedance, current density and temperature distribution and controlling wireless terminal communication.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a proton exchange membrane fuel cell test bench.
Background
The Proton Exchange Membrane Fuel Cell (PEMFC) is a power generation device which takes hydrogen energy as a carrier to convert chemical energy into electric energy, has the advantages of low reaction temperature, high dynamic response speed, high reaction efficiency, high power density and the like, and has wide application prospect in the traffic field. However, the severe neck phenomenon in the fuel cell technology field greatly hinders cost reduction and industrialization promotion, and in order to further promote fuel cell automobile industrialization, the autonomy of key materials and core technologies needs to be realized.
The performance test and characterization of the fuel cell are indispensable links in the development of the fuel cell, common basic tests comprise a polarization curve test and a dynamic working condition test, and the current market rack basically has the two test functions. However, in order to fully understand the operating mechanism and degradation principle of the fuel cell, more abundant tests are required, such as: the electrochemical impedance spectrum test can analyze different electrochemical processes in the fuel cell, so that key states in the fuel cell, such as water content in a proton exchange membrane, liquid water content in a porous medium, supply state of reaction gas and the like, can be deduced, and the method can be used for fault diagnosis of the fuel cell; the current partition test can analyze the current density distribution and the temperature distribution of the fuel cell, so that the gas supply distribution and the reaction efficiency of the fuel cell can be deduced. However, products in the current market cannot realize the functions, the voltage of the battery is often reduced in the test process, and the reason for the performance reduction of the battery is difficult to judge only through data such as voltage, current, pressure, flow and the like; in addition, the basic data such as voltage, current, pressure, flow that the rack gathered can't satisfy colleges and universities, research institute's demand now, consequently an urgent need for a fuel cell test rack that integrates above-mentioned function.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned deficiencies of the prior art and to providing a multi-functional fuel cell test rig.
The embodiment of the invention relates to a multifunctional proton exchange membrane fuel cell test bench, which comprises:
an air supply module for supplying air to the tested product;
a hydrogen supply module for supplying hydrogen to the product to be tested
The humidifying module is used for humidifying air and hydrogen;
the heat management module is used for controlling the dew point temperature of the humidification module according to the humidity required by the battery test, so as to meet the humidity required by the test;
the electronic load module is used for automatically controlling the constant current or constant power loading of the fuel cell, realizing overtemperature, undervoltage, overvoltage and overcurrent protection and realizing independent heat dissipation;
the electrochemical impedance module comprises an excitation unit and a calculation unit, wherein the excitation unit consists of circuit components and is used for generating alternating-current excitation current, the excitation current and the load current are superposed and are jointly applied to the fuel cell, and the calculation unit realizes impedance calculation under different frequencies by utilizing a fast Fourier change or wavelet change signal processing method according to acquired high-frequency current and voltage data and is used for diagnosing dry and water flooding phenomena of a fuel cell membrane;
the partitioned test module comprises a printed circuit board, a miniature thermocouple, a sensitive resistor and a data acquisition wire harness, wherein the printed circuit board is divided into a plurality of mutually insulated partitions, and the miniature thermocouple is used for calculating the temperature of the battery in a reverse-pushing mode;
the integrated control module comprises a rack control unit, a data acquisition unit, an analysis unit, an alarm unit and a wireless communication unit.
Further, the air supply module comprises a filter, an air mass flow control unit, a temperature sensor, a pressure sensor, an automatic back pressure control unit and an electromagnetic valve;
the air quality flow control unit realizes accurate control on air flow; the pressure sensor and the temperature sensor monitor the temperature and the pressure of the cathode side of the fuel cell in real time; an automatic back pressure control unit controls the cell cathode side inlet pressure.
Further, the hydrogen supply module comprises a filter, a hydrogen mass flow control unit, a temperature sensor, a pressure sensor, an automatic back pressure control unit and an electromagnetic valve;
the hydrogen mass flow control unit realizes accurate control of hydrogen flow; the pressure sensor and the temperature sensor monitor the temperature and the pressure of the anode side of the fuel cell in real time; the automatic back pressure control unit controls the cell anode side inlet pressure.
Further, the humidifying module comprises a humidifier, a temperature sensor, a humidity sensor, heat preservation cotton and a heating wire,
the humidifier is formed by a bubbling humidification mode or a spraying humidification mode, the temperature sensor is used for measuring the temperature of the humidification water in the humidifier, and the heat preservation cotton and the heating wires are used for heating and heat preservation of the air inlet pipeline.
Further, the heat management module comprises a water pump, a heat exchanger, a heating rod, a temperature sensor, a pressure sensor, a conductivity sensor, a cooling liquid flowmeter and a proportional valve,
the thermal management module controls the dew point temperature of the humidification module, and adjusts the temperature of the circulating cooling liquid of the battery to meet the temperature required by the test; the rotating speed of the water pump is adjusted in real time to meet the flow required by the test; adjusting the opening of the proportional valve in real time to meet the requirement of testing the pressure of the cooling liquid; and monitoring the conductivity of the cooling liquid in real time.
Further, the surface of the PCB is plated with gold to reduce contact resistance.
Furthermore, the integrated control module comprises a rack control unit, a data acquisition unit, an analysis unit, an alarm unit and the like, and a wireless communication module;
the rack control unit is used for controlling each actuator on the test rack, and controlling the pressure, flow, temperature and load current of the battery inlet;
the data acquisition unit acquires pressure, temperature and humidity signals in the rack; collecting high-frequency voltage and current data of the battery for impedance calculation; collecting electric signals on the partition test module for calculating current density and temperature distribution;
the analysis unit is used for analyzing the acquired data, drawing a measured impedance spectrogram, displaying impedance values and phase angle parameters under different frequencies, and fitting component parameters of the equivalent circuit of the capacitor and the resistor on line; drawing a current density and temperature distribution diagram, and displaying the lowest current density appearance site;
the alarm unit is used for monitoring safety problems in the test process of the rack in real time;
the wireless communication module is used for communicating with the wireless terminal. And transmitting the key data in the test bench to the wireless terminal, and transmitting the required parameters to the test bench through the wireless terminal equipment.
According to the embodiment of the invention, the electrochemical impedance module and the partition test module are added on the rack, so that the electrochemical impedance spectrum test and the current partition test are realized, different electrochemical processes in the fuel cell can be analyzed, and therefore, key states in the fuel cell, such as the water content in a proton exchange membrane, the liquid water content in a porous medium, the supply state of reaction gas and the like, can be deduced, and the method can be used for fault diagnosis of the fuel cell; the current density distribution and the temperature distribution of the fuel cell can be analyzed, so that the gas supply distribution and the reaction efficiency of the fuel cell can be deduced, and the requirements of colleges and scientific research institutions are met.
Drawings
FIG. 1 is a schematic view of the structure of the test bench of the present invention
FIG. 2 is a block diagram of a test module according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
As shown in the figures, the embodiment of the invention relates to a multifunctional proton exchange membrane fuel cell test bench, which specifically comprises: the device comprises an air supply module, a hydrogen supply module, a humidification module, a thermal management module, an electronic load module, an electrochemical impedance module, a partition test module and an integrated control module.
And the air supply module comprises a filter, a high-precision air mass flow control unit, a temperature sensor, a pressure sensor, an automatic back pressure control unit and an electromagnetic valve. The air needs to pass through a filter before entering the test bench, and redundant physical and chemical impurities in the air are filtered. The air quality and flow control unit mainly comprises a proportional valve, a flow sensor and a controller; the controller adjusts the opening of the proportional valve according to the target air flow and the actual measured flow so as to realize accurate control of the flow. The pressure sensor and the temperature sensor monitor the temperature and the pressure of the cathode side inlet of the fuel cell in real time, the temperature and the pressure of the air inlet are prevented from exceeding limit values, and meanwhile, the pressure sensor and the temperature sensor also monitor other key points of an air supply loop. The automatic back pressure control unit adjusts the opening of the proportional valve at the cathode outlet of the battery according to the actual measurement pressure of the air inlet of the battery and the target demand pressure so as to control the inlet pressure of the cathode side of the battery. In addition, the air supply module can also realize various air inlet modes such as dry air, wet air, dry and wet air mixing and the like.
The hydrogen supply module comprises a filter, a high-precision hydrogen mass flow control unit, a temperature sensor, a pressure sensor, an automatic back pressure control unit and an electromagnetic valve. Before the hydrogen enters the test bench, the redundant physical and chemical impurities in the hydrogen are filtered through the filter. The hydrogen mass flow control unit mainly comprises a proportional valve, a flow sensor and a controller; the controller adjusts the opening of the proportional valve according to the target hydrogen flow and the actual measured flow so as to realize accurate control of the flow. The pressure sensor and the temperature sensor monitor the temperature and the pressure of the anode side inlet of the fuel cell in real time, the temperature and the pressure of the inlet air are prevented from exceeding limit values, and meanwhile, the pressure sensor and the temperature sensor also monitor other key points of the hydrogen supply loop. The automatic back pressure control unit adjusts the opening of the proportional valve at the outlet of the anode of the battery according to the actual measurement pressure and the target demand pressure at the hydrogen inlet of the battery so as to control the inlet pressure of the anode of the battery. In addition, the hydrogen supply module can also realize various air inlet modes such as dry air, wet air, dry and wet air mixing and the like.
And the humidifying module comprises a humidifier, a temperature sensor, a humidity sensor, heat preservation cotton, a heating wire and the like. The humidifier can be composed of different types of humidification modes such as bubbling humidification and spraying humidification. The temperature sensor measures the temperature of the humidifying water in the humidifier, and the humidity sensor measures the humidity of the cathode and anode inlets of the battery and is used for real-time air inlet humidity feedback control. The heat preservation cotton and the heating wires are used for heating the air inlet pipeline and adjusting the air inlet humidity and temperature, and the phenomenon that condensed water is caused due to too low temperature is prevented. Air and hydrogen enter the humidifier and are fully humidified, ohmic loss of the fuel cell can be reduced, and the performance of the cell is improved.
The heat management module comprises a water pump, a heat exchanger, a heating rod, a temperature sensor, a pressure sensor, a conductivity sensor, a cooling liquid flowmeter and a proportional valve. The heat management module can control the dew point temperature of the humidification module according to the humidity required by the battery test, so that the humidity required by the test is met. Meanwhile, the temperature of the circulating cooling liquid can be adjusted according to the temperature requirement of the battery, so that the temperature required by the test is met; the rotating speed of the water pump can be adjusted in real time according to actually measured flow of the cooling loop and target required flow so as to meet the flow required by the test; in addition, the thermal management module can also adjust the opening of the proportional valve in real time according to the actually measured pressure of the cooling loop and the target required pressure so as to meet the requirement of the cooling liquid pressure in the testing process. Finally, the thermal management module can also monitor the conductivity of the cooling liquid in real time, and prevent the battery from declining due to overhigh conductivity.
The electronic load module has the function of automatically controlling the constant current or constant power loading of the fuel cell, can realize the protection of over-temperature, under-voltage, over-current and the like, and can realize independent heat dissipation.
The electrochemical impedance module comprises an excitation unit and a calculation unit. The exciting unit consists of circuit components and parts, can generate alternating exciting current, and can superpose the alternating exciting current and load current to be jointly applied to the fuel cell. The calculation unit realizes impedance calculation under different frequencies by using signal processing methods such as fast Fourier change or wavelet change and the like according to the acquired high-frequency current and voltage data, and can be used for diagnosing dry and water flooding phenomena of the fuel cell membrane. At present, most of fuel cell test benches do not have the function, and the benches with the function are special electrochemical workstations for directly purchasing fuel cells, so that the cost is high; this patent adopts the impedance calculation system of independently researching and developing, can realize with lower cost that higher accuracy impedance obtains.
The partitioned test module comprises a Printed Circuit Board (PCB), a micro thermocouple, a sensitive resistor and a data acquisition wiring harness, and the basic principle is as shown in figure 2. The current collector of the fuel cell is replaced by a printed circuit board, the PCB is divided into a plurality of mutually insulated subareas, and the surface of the PCB is plated with gold to reduce the contact resistance. The current has voltage drop when passing through the sensitive resistor, and the magnitude of the current is obtained by measuring the voltage drop of the current in the resistor. Meanwhile, the battery temperature is calculated by utilizing the resistance value of the micro thermocouple in a reverse-deducing mode. The fuel cell test bench on the market at present does not all possess this test function, and this patent technical scheme integrates the subregion test function in fuel cell test bench.
The integrated control module comprises a rack control unit, a data acquisition unit, an analysis unit, an alarm unit and a wireless communication unit.
The rack control unit mainly used controls each executor on the test rack, includes: the on-off of each electromagnetic valve on the rack, the communication of a flow controller, the opening adjustment of a back pressure valve, the heating power adjustment of a heating rod, the flow and pressure control of a circulating water pump, the dry and wet air bypass control, the load mode control and the like. The pressure, flow, temperature and load current of the battery inlet can be automatically programmed and controlled to meet different vehicle working condition tests.
The data acquisition unit is mainly used for acquiring signals such as pressure, temperature, humidity and the like in the air supply module, the hydrogen supply module, the humidification module and the thermal management module; in addition, the data acquisition unit also acquires high-frequency voltage and current data of the battery for rapid calculation of impedance; the data acquisition unit acquires the electric signals on the partition test module and is used for calculating current density and temperature distribution.
The analysis unit is used for analyzing the acquired data and has a drawing display function, and the required sensor data can be selected and displayed; the calculated impedance spectrogram can be drawn in real time, parameters such as impedance values, phase angles and the like under different key frequencies can be displayed, real-time analysis by a user is facilitated, the equivalent circuit model has a real-time conversion function, and the parameters of equivalent circuit components such as capacitors, resistors, Walberg and the like can be fitted on line; the current density and temperature profiles can be drawn in real time to show the lowest current density appearance site.
The alarm unit is used for monitoring safety problems in the bench test process in real time. When the hydrogen concentration exceeds a dangerous value, the rack gives an alarm. The safety alarm linkage is realized through monitoring software, and the air inlet temperature, pressure, flow and cooling water flow are subjected to overrun online monitoring alarm; meanwhile, the voltage, the current and the temperature of the battery are monitored and alarmed on line, and system hardware can be protected by sudden stop.
The wireless communication unit is mainly used for communicating with the wireless terminal. The key data of the test bench can be transmitted to the wireless terminal, so that remote data monitoring is realized; the required parameters can be sent to the test bench through the wireless terminal equipment, so that remote experiments are realized, and the test bench can be unattended on site; the wireless terminal equipment comprises one or more of a personal mobile phone, a tablet computer or a personal computer with a communication function.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations within the spirit of the invention will occur to those skilled in the art and are intended to be encompassed within the scope of the invention as claimed.
Claims (7)
1. A multi-functional proton exchange membrane fuel cell test bench, comprising:
the air supply module is used for controlling the air flow and the pressure of the fuel cell;
the hydrogen supply module is used for controlling the hydrogen flow and pressure of the fuel cell;
the humidifying module is used for humidifying the fuel cell inlet air;
the heat management module is used for controlling the temperature of a humidifying tank and the cooling liquid of the battery in the humidifying module;
an electronic load module for discharging the fuel cell;
the electrochemical impedance module comprises an excitation unit and a calculation unit, wherein the excitation unit consists of circuit components and is used for generating alternating-current excitation current, the excitation current and the load current are superposed and are jointly applied to the fuel cell, and the calculation unit realizes impedance calculation under different frequencies by utilizing a fast Fourier change or wavelet change signal processing method according to acquired high-frequency current and voltage data and is used for diagnosing dry and water flooding phenomena of a fuel cell membrane;
the partitioned test module comprises a printed circuit board, a miniature thermocouple, a sensitive resistor and a data acquisition wire harness, wherein the printed circuit board is divided into a plurality of mutually insulated partitions, and the miniature thermocouple is used for calculating the temperature of the battery in a reverse-pushing mode;
and the integrated control module is used for controlling the fuel cell rack, acquiring data, analyzing and processing, alarming and protecting and carrying out wireless communication.
2. The multifunctional pem fuel cell test rig of claim 1, wherein said air supply module comprises a filter, an air mass flow control unit, a temperature sensor, a pressure sensor, an automatic back pressure control unit, and a solenoid valve;
the air quality flow control unit realizes accurate control on air flow; the pressure sensor and the temperature sensor monitor the temperature and the pressure of the cathode side of the fuel cell in real time; an automatic back pressure control unit controls the cell cathode side inlet pressure.
3. The multi-functional PEMFC test bench of claim 1 wherein the hydrogen supply module comprises a filter, a hydrogen mass flow control unit, a temperature sensor, a pressure sensor, an automatic back pressure control unit and a solenoid valve;
the hydrogen mass flow control unit realizes accurate control of hydrogen flow; the pressure sensor and the temperature sensor monitor the temperature and the pressure of the anode side of the fuel cell in real time; the automatic back pressure control unit controls the cell anode side inlet pressure.
4. The multifunctional proton exchange membrane fuel cell test bench of claim 1, wherein the humidification module comprises a humidifier, a temperature sensor, a humidity sensor, heat insulation cotton, and a heating wire,
the humidifier is formed by a bubbling humidification mode or a spraying humidification mode, the temperature sensor is used for measuring the temperature of the humidification water in the humidifier, and the heat preservation cotton and the heating wires are used for heating and heat preservation of the air inlet pipeline.
5. The multi-functional PEMFC test bench of claim 1 wherein the thermal management module comprises a water pump, a heat exchanger, a heater bar, a temperature sensor, a pressure sensor, a conductivity sensor, a coolant flow meter, a proportional valve,
the thermal management module controls the dew point temperature of the humidification module, and adjusts the temperature of the circulating cooling liquid of the battery to meet the temperature required by the test; the rotating speed of the water pump is adjusted in real time to meet the flow required by the test; adjusting the opening of the proportional valve in real time to meet the requirement of testing the pressure of the cooling liquid; and monitoring the conductivity of the cooling liquid in real time.
6. The multifunctional pem fuel cell test rig of claim 1 wherein said PCB is gold plated to reduce contact resistance.
7. The multifunctional proton exchange membrane fuel cell test bench of claim 1, wherein the integrated control module comprises a bench control unit, a data acquisition unit, an analysis unit, an alarm unit, etc., and a wireless communication module;
the rack control unit is used for controlling each actuator on the test rack, and controlling the pressure, flow, temperature and load current of the battery inlet;
the data acquisition unit acquires pressure, temperature and humidity signals in the rack; collecting high-frequency voltage and current data of the battery for impedance calculation; collecting electric signals on the partition test module for calculating current density and temperature distribution;
the analysis unit is used for analyzing the acquired data, drawing a measured impedance spectrogram, displaying impedance values and phase angle parameters under different frequencies, and fitting component parameters of the equivalent circuit of the capacitor and the resistor on line; drawing a current density and temperature distribution diagram, and displaying the lowest current density appearance site;
the alarm unit is used for monitoring safety problems in the test process of the rack in real time;
the wireless communication module is used for communicating with the wireless terminal. And transmitting the key data in the test bench to the wireless terminal, and transmitting the required parameters to the test bench through the wireless terminal equipment.
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| CN111781523A (en) * | 2020-09-07 | 2020-10-16 | 爱德曼氢能源装备有限公司 | Fuel cell bipolar plate internal resistance detection device |
| CN113161579A (en) * | 2021-04-01 | 2021-07-23 | 中汽研汽车检验中心（天津）有限公司 | Multifunctional proton exchange membrane fuel cell component in-loop test bench |
| CN113237748A (en) * | 2021-04-28 | 2021-08-10 | 同济大学 | Multipurpose test system for fuel cell and application |
| CN113267680A (en) * | 2021-07-15 | 2021-08-17 | 国家电投集团氢能科技发展有限公司 | Proton exchange membrane conductivity test chamber and test method |
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