Single cell test system and method for multi-channel high-temperature proton exchange membrane fuel cell

Abstract

The invention relates to a single-cell test system and method for a multi-channel high-temperature proton exchange membrane fuel cell, and belongs to the field of high-temperature proton exchange membrane fuel cell performance evaluation equipment. The test system comprises a plurality of test channels, the test channels are arranged in parallel, and each test channel comprises a gas supply module, an electronic load module, an electrochemical impedance module, an alarm monitoring module and an integrated control module. According to the single cell test system of the multi-channel high-temperature proton exchange membrane fuel cell, the function of simultaneously carrying out single cell performance test on a plurality of groups of fuel cells under different test conditions can be realized, and the efficiency is improved; the automation degree is high, the functions of automatic gas flow rate switching, automatic load changing, automatic data recording and the like can be achieved, one-key operation is achieved, and manual guarding is not needed.

Description

Technical Field

[0001] The invention belongs to the field of high-temperature proton exchange membrane fuel cell performance evaluation equipment, and in particular relates to a single-cell testing system and method for a multi-channel high-temperature proton exchange membrane fuel cell. Background Art

[0002] At present, hydrogen energy, as a clean energy, is the most promising representative of new energy, and hydrogen power generation is the most effective way to utilize hydrogen energy, among which proton exchange membrane fuel cells are a common technology for hydrogen power generation. At present, some universities, research institutes, enterprises and other units have invested in the research field of high-temperature proton exchange membrane fuel cells and promoted the commercial application of high-temperature proton exchange membrane fuel cells. The performance test of fuel cells is the basic work in the research and development of fuel cells. However, the current fuel cell test system is mainly designed for specified fuel cells, and the single-cell test systems of proton exchange membrane fuel cells commonly seen on the market are mostly single-channel, and cannot test multiple groups of fuel cell cells at the same time. Summary of the invention

[0003] The present invention provides a single-cell testing system and method for a multi-channel high-temperature proton exchange membrane fuel cell, so as to realize intelligent and independent performance testing of single cells of multiple groups of fuel cells at the same time, improve test efficiency, save time, and shorten the development cycle of fuel cells. The system and method are particularly suitable for single-cell performance testing of high-temperature proton exchange membrane fuel cells.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions.

[0005] In a first aspect, the present invention provides a single cell testing system for a multi-channel high temperature proton exchange membrane fuel cell, the testing system comprising a plurality of testing channels, the plurality of testing channels being arranged in parallel, wherein each testing channel comprises the following modules:

[0006] A gas supply module, including an air supply module, a hydrogen supply module and a nitrogen supply module, for controlling the flow and pressure of air (or oxygen), hydrogen and nitrogen in the high-temperature proton exchange membrane fuel cell respectively;

[0007] A thermal management module, including an electric heating device and an electric heating control, for controlling the output power of the electric heating rod and thus controlling the temperature of the high-temperature proton exchange membrane fuel cell;

[0008] Electronic load module, used to control the discharge of high-temperature proton exchange membrane fuel cells and evaluate the performance of high-temperature proton exchange membrane fuel cells;

[0009] Electrochemical impedance module, used to obtain electrochemical impedance spectra of high-temperature proton exchange membrane fuel cells;

[0010] An alarm monitoring module, used to alarm abnormal parameters that occur during the high-temperature proton exchange membrane fuel cell test and provide protection measures for the high-temperature proton exchange membrane fuel cell; and

[0011] The integrated control module includes a PLC controller, a display screen (eg, a liquid crystal display screen), host computer software and integrated electrical components, and is used for system control, data acquisition, analysis and processing, alarm protection and wireless communication of a high-temperature proton exchange membrane fuel cell.

[0012] In the present invention, the single cell test system of the multi-channel high temperature proton exchange membrane fuel cell can select the number of test channels to be established according to actual needs, and the number of test channels is at least 2. A larger number of test channels can be selected according to needs, for example, 8, 16, 32, etc. The specific number depends on the use requirements and the size of the equipment. The gas supply, temperature control and discharge test of each channel can be carried out separately without affecting each other, and the running time is not limited, and can support 24 hours of continuous operation.

[0013] As an optional implementation, the single cell includes a membrane electrode, a graphite plate and a clamp.

[0014] As an optional implementation, the voltage of the single cell of the high temperature proton exchange membrane fuel cell is ≤1.2V (eg, 0.3V, 0.5V, 0.8V or 1.0V).

[0015] As an optional implementation, the current of the high temperature proton exchange membrane fuel cell single cell is 0 to 200 A (for example, 50 A, 100 A, 120 A, 150 A or 180 A).

[0016] As an optional embodiment, the operating temperature of the high temperature proton exchange membrane fuel cell cell is 100-200° C. (eg, 120° C., 140° C., 160° C. or 180° C.).

[0017] As an optional embodiment, the membrane electrode area of ​​the high temperature proton exchange membrane fuel cell single cell is 10 to 200 mm 2 (For example, 20mm 2 , 50mm 2 , 100mm 2 、150mm 2 or 180mm 2 ).

[0018] As an optional implementation, the single cell is formed by fixing a single membrane electrode between two graphite plates by a clamp.

[0019] As an optional implementation, the clamp is made of aluminum alloy.

[0020] As an optional implementation, the outside of the clamp is wrapped with thermal insulation cotton.

[0021] In the present invention, the clamp plays a fixing role in the single cell on the one hand, and a heat storage role on the other hand; the graphite plate plays a role of conducting electricity and distributing gas.

[0022] As an optional implementation, the gas supply module includes an air path, a hydrogen path and a nitrogen path, the hydrogen path provides anode gas, the air path provides cathode gas, and the nitrogen path provides purge gas.

[0023] As an optional implementation, the air circuit, the hydrogen circuit and the nitrogen circuit all include a solenoid valve, a ball valve, a mass flow meter and a one-way valve.

[0024] As an optional implementation, the nitrogen path is connected to the hydrogen path and converges into the hydrogen path to provide a hydrogen-rich mixed gas.

[0025] As an optional embodiment, the electric heating device includes an electric heating rod for heating the high-temperature proton exchange membrane fuel cell cell to make the high-temperature proton exchange membrane fuel cell reach a target temperature. Optionally, the target temperature is 100 to 200°C (for example, 120°C, 140°C, 150°C, 160°C, 180°C or 190°C).

[0026] In the present invention, the electric heating rod is arranged inside the single cell, for example, inside the clamp. Since the aluminum alloy material used in the clamp has good thermal conductivity, the clamp can evenly transfer heat to the graphite plate and the membrane electrode.

[0027] The thermal management module is used to heat up the high-temperature proton exchange membrane fuel cell during the startup phase. The electric heating rod is located inside the fixture. When heating up, the heat is transferred from the electric heating rod to the fixture, and then to the graphite plate and membrane electrode, so as to keep the temperature of the high-temperature proton exchange membrane fuel cell stable within a normal range.

[0028] As an optional embodiment, the electric heating control includes a temperature sensor; the temperature sensor detects the temperature of the high-temperature proton exchange membrane fuel cell cell, and the electric heating control controls the electric heating device through an integrated control module according to the detected temperature, thereby achieving control of the temperature of the high-temperature proton exchange membrane fuel cell cell.

[0029] As an optional implementation, the temperature sensor is arranged on a side of the graphite plate close to the membrane electrode, and is used to measure the temperature of the membrane electrode.

[0030] As an optional implementation, the electronic load module includes an electronic load meter.

[0031] In the present invention, after the host computer sets the discharge parameters (including current or voltage, gas flow rate, and discharge time) of the fuel cell of the corresponding channel, the test can be started, and the integrated control module will automatically change the load and record the data according to the set parameters. Functions such as polarization curve test, membrane electrode performance test, and life test can be realized. The electronic load corresponding to each channel can work independently, record test data separately, start and stop at any time, and do not interfere with each other, so as to achieve the effect of multi-channel test of fuel cells.

[0032] As an optional implementation, in the electronic load module, the discharge includes two modes: constant current discharge and constant voltage discharge.

[0033] As an optional implementation, in the electronic load module, the voltage test accuracy of a single battery reaches 0.0001V; the current test accuracy reaches 0.0001A.

[0034] As an optional implementation, the alarm monitoring module has four protection measures: environmental hydrogen concentration monitoring, voltage monitoring, gas pressure monitoring and battery temperature monitoring.

[0035] For example, when the hydrogen concentration in the environment is greater than 1000ppm (the set range can be modified as needed), the alarm mechanism is triggered, and when it is greater than 1%, the self-protection mechanism is triggered, that is, the discharge is stopped, the hydrogen and air are turned off, and the nitrogen purge is turned on.

[0036] The voltage is detected by the electronic load. When the voltage is detected to be beyond the set range (such as 0.5-1.2V, the set range can be modified as needed), the alarm monitoring module will automatically trigger the alarm mechanism and start the self-protection measures. Specifically, the display screen and the computer will automatically pop up an alarm prompt, the alarm indicator light will light up, and the system will automatically stop discharging and purge nitrogen.

[0037] When the gas pressure exceeds the set range (such as 0.2-0.3MPa, the set range can be modified as needed), the system will also automatically trigger the alarm mechanism and start self-protection measures.

[0038] The battery operating temperature should be maintained at a set value (for example, the normal operating temperature of a fuel cell is 160°C). If the temperature cannot be stabilized, the alarm monitoring mechanism will be automatically triggered and enter the protection mechanism.

[0039] As an optional implementation, the wireless communication can realize remote control operation of the high-temperature proton exchange membrane fuel cell via a mobile phone.

[0040] As an optional embodiment, the operating temperature of the high temperature proton exchange membrane fuel cell is 100-200° C. (for example, 120° C., 140° C., 150° C., 160° C., 180° C. or 190° C.).

[0041] In the present invention, the integrated control module includes a parameter setting function; the parameter control is set by the upper computer software, and can also be set on the device display screen.

[0042] In a second aspect, the present invention further provides a single cell testing method for a multi-channel high temperature proton exchange membrane fuel cell, which is tested using the above-mentioned single cell testing system for a multi-channel high temperature proton exchange membrane fuel cell. The testing method comprises the following steps:

[0043] 1) In the test system, one of the test channels is selected to assemble the membrane electrode, graphite plate and fixture, and the single cell, air path, hydrogen path and nitrogen path of the high-temperature proton exchange membrane fuel cell to be tested are connected to the test system, the electrode clamps are respectively connected to the cathode and anode of the single cell, and the temperature sensor and the electric heating device (for example, an electric heating rod) are placed at corresponding positions;

[0044] 2) Open the nitrogen solenoid valve, set the mass flow meter parameters so that the nitrogen flow rate reaches an applicable value, purge the hydrogen path and air path of the high-temperature proton exchange membrane fuel cell, and close the nitrogen solenoid valve after the purge is completed;

[0045] 3) while purging in step 2), turning on the electric heating device to heat the high-temperature proton exchange membrane fuel cell cell, so that the temperature of the high-temperature proton exchange membrane fuel cell reaches a set value;

[0046] 4) Enter the test parameters in the host computer software, and then click to start the test;

[0047] 5) The discharge performance of the high-temperature proton exchange membrane fuel cell is tested by an electronic load meter. During the discharge test, the system automatically adjusts the gas flow of hydrogen and air (or oxygen) to the target value according to the set value, and then discharges and automatically records the data.

[0048] As an optional implementation, in step 4), the test parameters include gradient discharge voltage or current, gradient discharge time, gradient gas flow, membrane electrode area, current density and gas stoichiometric ratio.

[0049] As an optional implementation, in step 5), during the discharge period, the discharge current starts from a small current to a stable state, and the current is gradually increased for testing.

[0050] As an optional implementation, step 5) further includes: monitoring the internal resistance of the single cell by impedance.

[0051] As an optional implementation, the single battery testing method further includes: an integrated control module in the testing system controls other modules in the testing system, collects and analyzes data, and provides alarm protection and wireless communication.

[0052] In the present invention, the above technical solutions can be freely combined to form new technical solutions without conflicting with each other.

[0053] The technical solution of the present invention has the following beneficial technical effects compared with the prior art:

[0054] (1) The single cell testing system for multi-channel high-temperature proton exchange membrane fuel cells provided by the present invention can realize the function of simultaneously testing the single cell performance of multiple fuel cells under different test conditions, thereby improving efficiency;

[0055] (2) The single-cell test system for a multi-channel high-temperature proton exchange membrane fuel cell provided by the present invention has a high degree of automation, and can realize functions such as automatic switching of gas flow rate, automatic load change, and automatic data recording, with one-button operation and no need for manual supervision;

[0056] (3) The single cell test system for multi-channel high-temperature proton exchange membrane fuel cells provided by the present invention can use a test mode of a mixed gas of nitrogen and hydrogen in any proportion in addition to a pure hydrogen test mode;

[0057] (4) The single cell test system of the multi-channel high-temperature proton exchange membrane fuel cell provided by the present invention adopts the heating method of the electric heating rod to heat the fuel cell to be tested, and the temperature range is 100-200°C. The temperature can be accurately controlled and is particularly suitable for the single cell performance test of the high-temperature proton exchange membrane fuel cell;

[0058] (5) The single cell test system of the multi-channel high-temperature proton exchange membrane fuel cell provided by the present invention is suitable for membrane electrode areas of 10 to 200 mm 2 Single cell performance test of high temperature proton exchange membrane fuel cell;

[0059] (6) The single-cell test system for the multi-channel high-temperature proton exchange membrane fuel cell provided by the present invention has four protection measures: environmental hydrogen concentration, gas pressure, temperature and voltage. When the measured value exceeds the set value, the platform will give an alarm and cut off the power supply and gas source, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0061] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0062] Figure 1 A schematic diagram of an electrical control structure of a single cell testing system for a multi-channel high-temperature proton exchange membrane fuel cell according to the present invention;

[0063] Figure 2 The figure is a gas circuit diagram of a multi-channel high-temperature proton exchange membrane fuel cell single cell testing system according to the present invention. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0065] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in this application can be purchased from the market or prepared by existing methods.

[0066] Example 1

[0067] A multi-channel high-temperature proton exchange membrane fuel cell single cell testing system is used to test the performance of a single cell of a high-temperature proton exchange membrane fuel cell; the testing system comprises a plurality of testing channels, the plurality of testing channels are arranged in parallel, so that the performance tests of a plurality of single cells can be independently performed simultaneously without interference; wherein each testing channel comprises: Figure 1 The six modules shown are: gas supply module, thermal management module, electronic load module, electrochemical impedance module, alarm control module and integrated control module. The structure and function of the single cell and each module of the high-temperature proton exchange membrane fuel cell to be tested are specifically introduced as follows.

[0068] (1) The high-temperature proton exchange membrane fuel cell to be tested includes a membrane electrode, a graphite plate and a fixture. The single membrane electrode is fixed between two graphite plates by the fixture to form a single cell. Its operating voltage is ≤1.2V, the current range is 0~200A, the operating temperature is 100~200℃, and the membrane electrode area is 10~200mm 2 The fixture is made of aluminum alloy and its outer side is wrapped with thermal insulation cotton. The fixture plays a role of fixing in the single cell on the one hand and storing heat on the other hand; in the single cell, the graphite plate plays the role of conducting electricity and distributing gas.

[0069] (2) The gas supply module includes an air supply submodule, a hydrogen supply submodule and a nitrogen supply submodule, which are used to control the flow and pressure of air (or oxygen), hydrogen and nitrogen in the high-temperature proton exchange membrane fuel cell respectively. Figure 2 A gas path schematic diagram of a single cell test system for a multi-channel high-temperature proton exchange membrane fuel cell is shown.

[0070] like Figure 2 As shown, the gas supply module includes an air circuit, a hydrogen circuit and a nitrogen circuit, wherein the hydrogen circuit provides anode gas for the single cell, the air circuit provides cathode gas, and the nitrogen circuit provides purge gas. The air circuit, the hydrogen circuit and the nitrogen circuit all include a solenoid valve, a ball valve, a mass flow meter and a one-way valve. When a single cell needs to use a hydrogen-rich mixed gas, the nitrogen circuit is connected to the hydrogen circuit and converged into the hydrogen circuit by controlling the solenoid valve to provide a hydrogen-rich mixed gas for the single cell.

[0071] (3) The thermal management module includes an electric heating device and an electric heating control, which is used to control the output power of the electric heating device and thus control the temperature of the high-temperature proton exchange membrane fuel cell.

[0072] The electric heating device uses an electric heating rod, which is arranged inside the single cell fixture to heat the high-temperature proton exchange membrane fuel cell single cell so that the high-temperature proton exchange membrane fuel cell reaches the target operating temperature (for example, 160°C).

[0073] The electric heating control includes a temperature sensor, which is arranged on one side of the graphite plate close to the membrane electrode to measure the temperature of the membrane electrode. The electric heating control controls the electric heating device through the integrated control module according to the detected temperature to control the temperature of the single cell of the high-temperature proton exchange membrane fuel cell.

[0074] During the startup phase, the thermal management module heats the battery through an electric heating rod located inside the fixture of the single cell, transfers the heat to the fixture, and then to the graphite plate and membrane electrode, thereby raising the temperature of the high-temperature proton exchange membrane fuel cell. The temperature of the high-temperature proton exchange membrane fuel cell is stabilized within the normal operating range by controlling the electric heating rod.

[0075] (4) The electronic load module includes an electronic load meter, which is used to control the discharge of the high-temperature proton exchange membrane fuel cell and evaluate the performance of the high-temperature proton exchange membrane fuel cell.

[0076] Specifically, after the host computer sets the discharge parameters (including current or voltage, gas flow rate, and discharge time) of the fuel cell of the corresponding channel, the performance of the single cell is tested, and the integrated control module automatically changes the load and records the data according to the set parameters. In this electronic load module, the discharge mode includes constant current discharge and constant voltage discharge, which can realize functions such as polarization curve test, membrane electrode performance test, and life test. The electronic load corresponding to each channel can work independently, record test data separately, start and stop at any time, and do not interfere with each other, so as to achieve the effect of multi-channel testing of fuel cells.

[0077] (5) Electrochemical impedance module, used to obtain the electrochemical impedance spectrum of high-temperature proton exchange membrane fuel cells; the internal resistance of a single cell can be calculated through electrochemical impedance.

[0078] (6) Alarm monitoring module, which has four protection measures: environmental hydrogen concentration monitoring, voltage monitoring, gas pressure monitoring and battery temperature monitoring. It is used to alarm abnormal parameters that occur during the high-temperature proton exchange membrane fuel cell test and provide protection measures for the high-temperature proton exchange membrane fuel cell.

[0079] (7) An integrated control module, including a PLC controller, a display screen (e.g., a liquid crystal display screen), a host computer software, and integrated electrical components, for system control, data acquisition, analysis and processing, alarm protection, and wireless communication of a high-temperature proton exchange membrane fuel cell. For example, wireless communication can realize remote monitoring and control of the high-temperature proton exchange membrane fuel cell via a mobile phone. The integrated control module includes a parameter setting function; the parameter control is set by the host computer software and can also be set on the device display screen.

[0080] In this embodiment, the single cell test system of the multi-channel high-temperature proton exchange membrane fuel cell can select the number of test channels to be established according to actual needs, for example, it can be 8, 16 or 32. The gas supply, temperature control and discharge test of each channel can be carried out separately without affecting each other, the running time is not limited, and it can support 24 hours of continuous operation. The single cell test system of the multi-channel high-temperature proton exchange membrane fuel cell is suitable for the performance test of the single cell of the high-temperature proton exchange membrane fuel cell, especially for the performance test of the single cell of the high-temperature proton exchange membrane fuel cell with an operating temperature of 100 to 200 ° C.

[0081] Example 2

[0082] A method for testing a single cell of a multi-channel high-temperature proton exchange membrane fuel cell, using the single cell testing system of the multi-channel high-temperature proton exchange membrane fuel cell provided in Example 1, and testing a single cell of a membrane electrode area of ​​165mm 2 The performance of a single cell of a high temperature proton exchange membrane fuel cell is tested, including the following steps:

[0083] Step S1: In the test system, select a test channel to assemble the membrane electrode, graphite plate and fixture, connect the single cell, air path, hydrogen path and nitrogen path of the high-temperature proton exchange membrane fuel cell to be tested with the test system, connect the electrode clamps to the cathode and anode of the single cell respectively, and place the temperature sensor and electric heating rod at the corresponding positions;

[0084] Step S2: Open the nitrogen solenoid valve, set the mass flow meter parameter to 100 mL / min so that the nitrogen flow rate reaches this value, purge the hydrogen path and air path of the high-temperature proton exchange membrane fuel cell, and close the nitrogen solenoid valve after the purge is completed;

[0085] Step S3: while purging in step S2, turning on the electric heating device to heat the high-temperature proton exchange membrane fuel cell cell, so that the temperature of the high-temperature proton exchange membrane fuel cell reaches 160° C.;

[0086] Step S4: Input the test parameters in the host computer software, including gradient discharge voltage or current, gradient discharge time, gradient gas flow rate, membrane electrode area, current density, gas stoichiometric ratio, etc., and then click to start the test;

[0087] Step S5: The discharge performance of the high temperature proton exchange membrane fuel cell is tested by an electronic load meter. During the discharge test, the system automatically adjusts the gas flow of hydrogen and air (or oxygen) to the target value according to the set value, and then discharges and automatically records the data. During the discharge, the discharge current starts from a small current to a stable current, and the current is gradually increased for testing. In addition, the internal resistance of the single cell is monitored by impedance.

[0088] In this embodiment, a test system is used to test the single-cell operation process of the fuel cell. The integrated control module in the test system controls other modules in the test system, collects and analyzes data, and provides alarm protection and wireless communication. For example, the integrated control module realizes remote control of the operation process of the high-temperature proton exchange membrane fuel cell by a mobile phone through wireless communication. When any of the monitoring results of hydrogen concentration monitoring, single-cell voltage monitoring, reaction gas pressure monitoring, single-cell temperature monitoring and electrical output power monitoring is abnormal, the alarm control module will alarm with abnormal information prompts. When the abnormal situation is serious, the alarm control module will cut off the power and gas source to ensure the safe and stable operation of the high-temperature proton exchange membrane fuel cell.

[0089] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein. In the present invention, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in the field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0091] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0092] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A single cell test system for a multi-channel high temperature proton exchange membrane fuel cell, characterized in that: The test system includes a plurality of test channels, which are arranged in parallel, wherein each test channel includes the following modules: A gas supply module, including an air supply module, a hydrogen supply module and a nitrogen supply module, for controlling the flow and pressure of air, hydrogen and nitrogen in the high-temperature proton exchange membrane fuel cell respectively; A thermal management module, including an electric heating device and an electric heating control, for controlling the output power of the electric heating rod and thus controlling the temperature of the high-temperature proton exchange membrane fuel cell; Electronic load module, used to control the discharge of high-temperature proton exchange membrane fuel cells and evaluate the performance of high-temperature proton exchange membrane fuel cells; Electrochemical impedance module, used to obtain electrochemical impedance spectra of high-temperature proton exchange membrane fuel cells; An alarm monitoring module, used to alarm abnormal parameters that occur during the high-temperature proton exchange membrane fuel cell test and provide protection measures for the high-temperature proton exchange membrane fuel cell; and The integrated control module includes a PLC controller, a display screen, a host computer software and integrated electrical components, and is used for system control, data acquisition, analysis and processing, alarm protection and wireless communication of high-temperature proton exchange membrane fuel cells.

2. The single cell testing system for a multi-channel high temperature proton exchange membrane fuel cell according to claim 1, characterized in that: The single cell comprises a membrane electrode, a graphite plate and a fixture; or / and The voltage of the high temperature proton exchange membrane fuel cell cell is ≤1.2V; or / and The current of the high temperature proton exchange membrane fuel cell single cell is 0 to 200A; or / and The operating temperature of the high temperature proton exchange membrane fuel cell cell is 100-200° C.; or / and The membrane electrode area of ​​the high-temperature proton exchange membrane fuel cell single cell is 10 to 200 mm 2 .

3. The single cell testing system for a multi-channel high temperature proton exchange membrane fuel cell according to claim 1 or 2, characterized in that: The gas supply module includes: an air circuit, a hydrogen circuit and a nitrogen circuit, the hydrogen circuit provides anode gas, the air circuit provides cathode gas, and the nitrogen circuit provides purge gas; the air circuit, the hydrogen circuit and the nitrogen circuit each include a solenoid valve, a ball valve, a mass flow meter and a check valve; The nitrogen path is communicated with the hydrogen path and converges into the hydrogen path, so as to provide a hydrogen-rich mixed gas.

4. The single cell testing system for a multi-channel high temperature proton exchange membrane fuel cell according to claim 1 or 2, characterized in that: The electric heating device includes an electric heating rod, which is used to heat the high-temperature proton exchange membrane fuel cell single cell to make the high-temperature proton exchange membrane fuel cell reach the target temperature; The electric heating control comprises a temperature sensor; the temperature sensor is arranged on a side of the graphite plate close to the membrane electrode and is used to measure the temperature of the membrane electrode.

5. The single cell testing system for a multi-channel high temperature proton exchange membrane fuel cell according to claim 1 or 2, characterized in that: In the electronic load module, the electronic load module includes an electronic load meter; In the electronic load module, the discharge includes two modes: constant current discharge and constant voltage discharge.

6. The single cell testing system for a multi-channel high temperature proton exchange membrane fuel cell according to claim 5, characterized in that: In the electronic load module, the voltage test accuracy of a single battery reaches 0.0001V; the current test accuracy reaches 0.0001A.

7. The single cell testing system for a multi-channel proton exchange membrane fuel cell according to claim 1 or 2, characterized in that: The alarm monitoring module has four protection measures: environmental hydrogen concentration monitoring, voltage monitoring, gas pressure monitoring and battery temperature monitoring; or The wireless communication can realize the remote control operation of the proton exchange membrane fuel cell by mobile phone.

8. A single cell testing method for a multi-channel high temperature proton exchange membrane fuel cell, characterized in that: The test is performed using a single cell test system for a multi-channel high temperature proton exchange membrane fuel cell according to any one of claims 1 to 7, wherein the test method comprises the following steps: 1) In the test system, one of the test channels is selected to assemble the membrane electrode, graphite plate and fixture, and the single cell, air path, hydrogen path and nitrogen path of the high-temperature proton exchange membrane fuel cell to be tested are connected to the test system, the electrode clamps are respectively connected to the cathode and anode of the single cell, and the temperature sensor and electric heating device are placed at the corresponding positions; 2) Open the nitrogen solenoid valve, set the mass flow meter parameters so that the nitrogen flow rate reaches an applicable value, purge the hydrogen path and air path of the high-temperature proton exchange membrane fuel cell, and close the nitrogen solenoid valve after the purge is completed; 3) while purging in step 2), turning on the electric heating device to heat the high-temperature proton exchange membrane fuel cell cell, so that the temperature of the high-temperature proton exchange membrane fuel cell reaches a set value; 4) Enter the test parameters in the host computer software, and then click to start the test; 5) The discharge performance of the high-temperature proton exchange membrane fuel cell is tested by an electronic load meter. During the discharge test, the system automatically adjusts the gas flow of hydrogen and air to the target value according to the set value, and then discharges and automatically records the data.

9. The single cell testing method of a multi-channel high temperature proton exchange membrane fuel cell according to claim 8, characterized in that: In step 4), the test parameters include gradient discharge voltage or current, gradient discharge time, gradient gas flow rate, membrane electrode area, current density and gas stoichiometric ratio; or In step 5), during the discharge period, the discharge current starts from a small current to a stable state, and the current is gradually increased for testing.

10. The single cell testing method of a multi-channel high temperature proton exchange membrane fuel cell according to claim 8 or 9, characterized in that: The single battery testing method further includes: an integrated control module in the testing system controls other modules in the testing system, collects and analyzes data, and provides alarm protection and wireless communication.

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