CN115184815A - Fuel cell monocell test system - Google Patents
Fuel cell monocell test system Download PDFInfo
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- CN115184815A CN115184815A CN202210712942.7A CN202210712942A CN115184815A CN 115184815 A CN115184815 A CN 115184815A CN 202210712942 A CN202210712942 A CN 202210712942A CN 115184815 A CN115184815 A CN 115184815A
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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]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
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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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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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
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Abstract
The application discloses a fuel cell testing system, which comprises a cell clamp, a gas supply module, a buffer module and a gas cavity; the buffer module is respectively connected in series and communicated with the gas supply module and the single cell clamp, the gas cavity is respectively connected in series and communicated with the gas supply module and the single cell clamp, and the buffer module is connected in parallel and communicated with the gas cavity; the gas supply module is used for supplying gas to the buffer module and the gas cavity; the buffer module is used for buffering the gas pressure of the gas cavity so as to maintain the gas pressure in the gas cavity within a preset pressure range; the single cell clamp is used for forming a single cell to be tested with the membrane electrode and testing the single cell to be tested through the buffer module and gas transmitted by the gas cavity. This application is parallelly connected and UNICOM through buffer module and gas cavity, makes gas cavity's pressure maintain at the preset pressure scope to make battery test process normal clear, and then obtain the higher battery performance data of precision.
Description
Technical Field
The application relates to the technical field of fuel cells, in particular to a single cell testing system of a fuel cell.
Background
The membrane electrode is used as a core component in the fuel cell and has extremely important influence on the output performance and the environmental adaptability of the fuel cell; the output performance of the membrane electrode can be measured by testing the membrane electrode of the fuel cell, meanwhile, the working state of the membrane electrode can be represented by means of some electrochemical testing means, and the fuel cell fixture is extremely important for relevant tests such as testing the performance of a fuel cell single cell as an important tool for testing the membrane electrode.
In the single cell testing process of the hydrogen fuel cell, hydrogen needs to be introduced into the anode of the single cell and air needs to be introduced into the cathode of the single cell, the anode hydrogen is ionized at the anode to generate hydrogen ions, and the hydrogen ions are combined with the hydronium ions at the cathode through a proton exchange membrane to generate water, heat and current; the accuracy of the tested battery performance data is low due to the low stability of the inlet pressure of the anode hydrogen and the cathode air; in addition, the testing process is prone to abnormal interruptions due to the difficulty of controlling the inlet pressure of hydrogen and air by the experimenter.
Disclosure of Invention
In order to solve the technical problems of unstable battery performance data and easy interruption of the testing process caused by unstable inlet pressure of the existing experimental device, the invention provides a single cell testing system of a fuel cell.
The embodiment of the application provides a fuel cell testing system, which comprises a cell clamp, a gas supply module, a buffer module and a gas cavity; the buffer module is respectively connected with the gas supply module and the single cell clamp in series and communicated with the gas cavity, and the buffer module is connected with the gas cavity in parallel and communicated with the gas cavity;
the gas supply module is used for providing gas for the buffer module and the gas cavity;
the buffer module is used for buffering the gas pressure of the gas cavity so as to maintain the gas pressure in the gas cavity within a preset pressure range;
the monocell clamp is used for forming a monocell to be tested with a membrane electrode, and is used for testing the monocell to be tested through the gas transmitted by the buffer module and the gas cavity.
Further, the gas supply module comprises a hydrogen supply module and an air supply module, the buffer module comprises a first buffer module and a second buffer module, and the gas cavity comprises a hydrogen cavity and an air cavity;
the first buffer module is connected in series and communicated with the hydrogen supply module and the single cell clamp through a first pipeline respectively, the second buffer module is connected in series and communicated with the air supply module and the single cell clamp through a second pipeline respectively, the first buffer module is connected in parallel and communicated with the hydrogen cavity, and the second buffer module is connected in parallel and communicated with the air cavity;
the hydrogen supply module is used for supplying hydrogen to the first buffer module and the hydrogen cavity;
the air supply module is used for providing air for the second buffer module and the air cavity;
the first buffer module is used for buffering the gas pressure of the hydrogen cavity, so that the gas pressure in the hydrogen cavity is maintained within a preset pressure range;
and the second buffer module is used for buffering the gas pressure of the air cavity so as to maintain the gas pressure in the air cavity within a preset pressure range.
Further, the gas supply module further comprises a third gas supply module, and the third gas supply module is respectively connected in series and communicated with the first buffer module and the hydrogen cavity through a third pipeline;
and the third gas supply module is used for providing third gas for the first buffer module and the hydrogen cavity and removing original gas in the first buffer module and the hydrogen cavity.
Further, the system also comprises an electronic load module, wherein the electronic load module is connected with the anode and the cathode of the single battery to be tested;
the electronic load module is used for consuming the current generated by the to-be-tested single battery in the testing process.
Further, the system also comprises a heating module, wherein the heating module is fixedly connected with the single battery clamp;
the heating module is used for controlling the temperature required by the monocell to be tested in the testing process.
Further, the volume ratio of the first buffer module to the hydrogen cavity is greater than or equal to a first preset volume threshold, and the volume ratio of the second buffer module to the air cavity is greater than or equal to a second preset volume threshold.
Furthermore, a pressure reduction module and a first one-way control module are arranged on the first pipeline, and a second one-way control module is arranged on the second pipeline;
the pressure reduction module is used for adjusting the gas pressure in the first pipeline;
the first one-way control module is used for preventing the hydrogen from flowing back and preventing the damage of the monocell to be tested caused by the reduction of the gas pressure in the hydrogen cavity;
the second unidirectional control module is used for preventing the air from flowing back and preventing the gas pressure in the air cavity from being reduced to damage the to-be-tested single cells.
Further, an explosion-proof electromagnetic module is arranged between the pressure reduction module and the first one-way control module.
Further, flow testing modules are arranged on the first pipeline and the second pipeline;
the flow test module is used for testing the gas flow in the first pipeline and the second pipeline.
Furthermore, the first pipeline and the second pipeline are provided with a humidifying module, the humidifying module comprises a first humidifying module and a second humidifying module, the first humidifying module is arranged on the first pipeline and is connected with the first buffering module in parallel, the second humidifying module is arranged on the second pipeline and is connected with the second buffering module in parallel;
the first humidification module is used for adjusting the gas humidity in the first pipeline;
the second humidification module is used for adjusting the gas humidity in the second pipeline.
The fuel cell testing system provided by the embodiment of the application has the following technical effects:
the fuel cell testing system comprises a cell clamp, a gas supply module, a buffer module and a gas cavity; the buffer module is respectively connected in series and communicated with the gas supply module and the single cell clamp, the gas cavity is respectively connected in series and communicated with the gas supply module and the single cell clamp, and the buffer module is connected in parallel and communicated with the gas cavity; the gas supply module is used for supplying gas to the buffer module and the gas cavity; the buffer module is used for buffering the gas pressure of the gas cavity so as to maintain the gas pressure in the gas cavity within a preset pressure range; the monocell clamp is used for forming a monocell to be tested with the membrane electrode and is used for testing the monocell to be tested through the buffer module and gas transmitted by the gas cavity. This application makes gas cavity's pressure maintain at predetermineeing the pressure range through increasing parallelly connected and UNICOM of buffer module and gas cavity to make battery test process normal clear, and then obtain the higher battery performance data of precision.
Drawings
In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a fuel cell testing system provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram ii of a fuel cell testing system according to an embodiment of the present application.
The following is a supplementary description of the drawings:
4-single cells to be tested; 10-a gas supply module; 11-a pressure reducing module; 13-explosion-proof electromagnetic module; 14-a flow test module; 15-a humidification module; 16-a proportional valve; 17-a manual cylinder valve; 20-a buffer module; 30-a gas chamber; 40-single cell clamp; 50-an electronic load module; 60-heating the module; 101-a hydrogen supply module; 102-an air supply module; 103-a third gas supply module; 121-a first unidirectional control module; 122-a second unidirectional control module; 123-a third unidirectional control module; 151-a first humidification module; 152-a second humidification module; 201-a first buffer module; 202-a second buffer module; 301-a hydrogen chamber; 302-air cavity.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, fig. 1 is a schematic structural diagram 1 of a fuel cell testing system according to an embodiment of the present application, as shown in fig. 1:
the fuel cell testing system comprises a cell clamp 40, a gas supply module 10, a buffer module 20 and a gas cavity 30; the buffer module 20 is respectively connected in series and communicated with the gas supply module 10 and the cell clamp 40, the gas cavity 30 is respectively connected in series and communicated with the gas supply module 10 and the cell clamp 40, and the buffer module 20 is connected in parallel and communicated with the gas cavity 30;
the gas supply module 10 is used for supplying gas to the buffer module 20 and the gas cavity 30;
the buffer module 20 is configured to buffer a gas pressure of the gas chamber 30, so that the gas pressure in the gas chamber 30 is maintained within a preset pressure range;
the single cell clamp 40 is used for forming a single cell 4 to be tested with the membrane electrode, and is used for testing the single cell 4 to be tested through the gas transmitted by the buffer module 20 and the gas cavity 30.
In the embodiment of the present application, the gas supply module 10 includes a hydrogen gas supply module 101 and an air supply module 102, the buffer module 20 includes a first buffer module 201 and a second buffer module 202, and the gas cavity 30 includes a hydrogen gas cavity 301 and an air cavity 302.
In an alternative implementation, for a normal temperature, low pressure gas system, the change in gas pressure can be described by an ideal gas state equation, which is as follows:
Vd p ＝RTd n
in the formula: v represents the volume of the buffer module; p represents the system pressure; n represents the number of moles of gas in the system; t represents the system temperature.
It can be seen from the formula that when the temperature changes, the volume V is not changed, which causes the system pressure to change greatly. During the testing process of the single fuel cell, the inlet pressure of anode hydrogen and cathode air is always unstable due to expansion and contraction of gas, and the inlet pressure is large or small, so that the pressure of the gas cannot be controlled within a preset pressure range.
Alternatively, as shown in fig. 2, in order to maintain the gas pressure of the hydrogen cavity 301 and the air cavity 302, in the embodiment of the present application, a first buffer module 201 and a second buffer module 202 are provided, the first buffer module 301 is connected in series and communicated with the hydrogen supply module 101 and the cell clamp 40 through a first pipeline, respectively, and the first buffer module 201 is connected in parallel and communicated with the hydrogen cavity 301, so that the hydrogen supply module 101 can provide hydrogen to the first buffer module 201 and the hydrogen cavity 301, and the hydrogen pressure of the hydrogen cavity 301 can be maintained within a preset range under the buffer action of the first buffer module 201.
Alternatively, the second buffer module 302 may be connected in series and communicated with the air supply module 102 and the cell clamps 40 through a second pipe, respectively, and the second buffer module 202 may be connected in parallel and communicated with the air cavity 302, so that the air supply module 102 may provide air to the second buffer module 202 and the air cavity 302, and the air pressure of the air cavity 302 may be maintained within a preset range under the buffer action of the second buffer module 202.
In the traditional fuel cell single cell testing process, when a single cell runs at a large current, the fuel cell generates more heat, the running temperature is high, the temperature rise is fast, the hydrogen cavity 301 of the single fuel cell is small in size, so that the pressure of the fuel cell is fast raised, the influence on the test is large, and the test failure is easily caused.
In the single cell testing process of the fuel cell, the testing conditions and the testing results are shown in table 1 when the buffer module 20 is not provided, wherein the electrical density in table 1 refers to the current density, the temperature refers to the temperature of the single cell clamp, the air inlet pressure refers to the air pressure, the pressure difference refers to the difference between the hydrogen pressure and the air pressure, the anode metering ratio refers to the hydrogen flow rate, the cathode metering ratio refers to the air flow rate, the anode relative humidity refers to the hydrogen humidity, and the cathode relative humidity refers to the air humidity:
TABLE 1 Single cell susceptibility test conditions (no buffer module provided)
Actual performance data of the fuel cell is shown in table 2, where the electrical density in table 2 refers to the current density, the temperature refers to the temperature of the cell clamps, the air inlet pressure refers to the air pressure, the differential pressure refers to the difference between the hydrogen pressure and the air pressure, the anode metering ratio refers to the hydrogen flow rate, the cathode metering ratio refers to the air flow rate, the anode relative humidity refers to the hydrogen humidity, and the cathode relative humidity refers to the air humidity:
TABLE 2-330 pieces of sensitivity test states of the cell stack
The test conditions and test results after the buffer module 20 is set are shown in table 3, where the electrical density in table 1 refers to the current density, the temperature refers to the temperature of the cell clamp, the air inlet pressure refers to the air pressure, the differential pressure refers to the difference between the hydrogen pressure and the air pressure, the anode metering ratio refers to the hydrogen flow rate, the cathode metering ratio refers to the air flow rate, the anode relative humidity refers to the hydrogen humidity, and the cathode relative humidity refers to the air humidity:
TABLE 3 Single cell susceptibility test conditions (with buffer Module)
As can be seen from the data in the above table, under the same working condition, when a single condition is changed on the cell stack, the performance of the cell increases steadily, but on the cell test equipment without the buffer module 20, the performance of the cell changes with the temperature, the pressure increases, the system performance climbs too fast, and the temperature changes under one condition, but actually the temperature and the pressure change under two conditions, which results in the virtual high performance of the cell and is far from the actual condition (the performance of 330 cell stacks in table 2), and the test result is meaningless; after the buffer module 20 connected in parallel with the gas cavity 30 is added, it can be seen from the test data in table 3 that the difference between the performance of the single cell and the performance of the stack is small, and the true state of the reactor can be relatively accurate.
When the single fuel cell is reduced from high power to low power, the operation pressure of the fuel cell is reduced, the operation temperature of the fuel cell is reduced, the actual pressure reduction of the fuel cell is large, the reaction fuel of the fuel cell is insufficient, the voltage of the fuel cell is unstable and falls to a limit value, and the experiment cannot be continued.
In the testing process of reducing the power of the single fuel cell from high power to low power, the test conditions and the test results are shown in table 4 when the buffer module 20 is not provided, wherein the electrical density in table 1 refers to the current density, the temperature refers to the temperature of the single cell clamp, the air inlet pressure refers to the air pressure, the differential pressure refers to the difference between the hydrogen pressure and the air pressure, the anode metering ratio refers to the hydrogen flow rate, the cathode metering ratio refers to the air flow rate, the anode relative humidity refers to the hydrogen humidity, and the cathode relative humidity refers to the air humidity:
TABLE 4 table of the conditions of the single cell sensitivity test
The test conditions and test results after the buffer module 20 is disposed are shown in table 5, where the electrical density in table 1 refers to the current density, the temperature refers to the temperature of the cell clamp, the air inlet pressure refers to the air pressure, the pressure difference refers to the difference between the hydrogen pressure and the air pressure, the anode metering ratio refers to the hydrogen flow rate, the cathode metering ratio refers to the air flow rate, the anode relative humidity refers to the hydrogen humidity, and the cathode relative humidity refers to the air humidity:
TABLE 5 Single cell sensitivity test conditions (setting buffer Module)
It can be seen from the above data that, under the condition that the buffer module 20 and the gas cavity 30 are not arranged in parallel, when the cell is subjected to the variable load test, the test is very easy to suddenly stop (the sudden stop voltage of the cell is 400 mV), so that the test cannot be normally performed, and the test result has little reference significance for the actual application of the cell stack.
In order to maintain the gas pressure in the gas cavity 30, the buffer module 20 is connected with the gas cavity 30 in parallel, when the gas in the gas cavity expands with heat and contracts with cold, the gas in the buffer module 20 does not expand with heat and contract with cold, the gas in the buffer module 20 can be effectively buffered, so that the pressure of the gas cavity 30 of the fuel cell maintains a relatively stable pressure, the normal operation of a test experiment is ensured, and more accurate experimental data can be obtained.
In an optional embodiment, in order to ensure that the experiment can be performed normally, a third gas supply module 103 is further provided, the third gas supply module 103 is respectively connected in series and communicated with the first buffer module 201 and the hydrogen cavity 301 through a third pipeline, before the experiment starts, the third gas supply module 103 continuously provides a rare gas to the first buffer module 201 and the hydrogen cavity 301 to remove the original gas in the first buffer module 201 and the hydrogen cavity 301, and optionally, the rare gas is helium.
In an alternative embodiment, a manual cylinder valve 17, a pressure reducing module 11 and a third one-way control valve 123 are arranged on the third pipeline, the manual cylinder valve 17 is used for controlling the supply amount of the rare gas, the pressure reducing module 11 is used for adjusting the pressure of the rare gas, and the third one-way control valve 123 is used for preventing the rare gas in the third pipeline from flowing back.
In an alternative embodiment, the fuel cell testing system is further provided with an electronic load module 50, wherein a positive electrode of the electronic load module 50 is connected with a positive electrode of the cell 4 to be tested, and a negative electrode of the electronic load module 50 is connected with a negative electrode of the cell 4 to be tested, so that the electronic load module can be used for consuming current generated by the cell 4 to be tested during testing and controlling discharge current of the cell 4 to be tested.
In an optional embodiment, the fuel cell testing system is further provided with a heating module 60, the heating module 60 is fixedly connected with the cell fixture 40, so that the temperature required by the cell 4 to be tested in the testing process can be controlled, and the experimental data of the fuel cell at different temperatures can be acquired, and optionally, the heating module 60 is a heating rod, and the heating rod can conveniently and quickly control the temperature required by the experiment.
In an alternative embodiment, in order to better achieve the buffering effect of the buffer module 20 on the gas cavity 30 and maintain the gas pressure of the gas cavity 30 in the preset pressure range, the volume ratio of the first buffer module 201 to the hydrogen cavity 301 is greater than or equal to a first preset volume threshold, and the volume ratio of the second buffer module 202 to the air cavity 302 is greater than or equal to a second preset volume threshold.
As an example, the first preset volume threshold and the second preset volume threshold are equal (e.g., 15-30 each).
As an example, the first preset volume threshold and the second preset volume threshold may not be equal, for example, a difference between the first preset volume threshold and the second preset volume threshold satisfies a preset condition (e.g., a difference between the two is less than a certain value), and the like.
In an optional embodiment, the first pipeline is provided with the pressure reduction module 11 and the first unidirectional control module 121, the second pipeline is provided with the second unidirectional control module 122, the pressure reduction module 11 can conveniently adjust the gas pressure in the first pipeline to control the pressure required in the cell test experiment process, the first unidirectional control module 121 can prevent the hydrogen gas in the first pipeline from flowing back, and prevent the hydrogen gas supply interruption suddenly occurring in the cell test process, the gas pressure in the hydrogen cavity 301 is suddenly reduced, and the gas pressure in the air cavity 302 is higher, which results in the damage of the cell to be tested. Similarly, the second unidirectional control module 122 can prevent air in the second pipeline from flowing back, and prevent air supply interruption which occurs suddenly in the single cell testing process, the gas pressure of the air cavity 302 is suddenly reduced, and the gas pressure in the hydrogen cavity 301 is higher, which results in the damage of the single cell to be tested.
In an optional embodiment, the explosion-proof electromagnetic module 13 is arranged in the first pipeline, and the explosion-proof electromagnetic module can bear the explosion-proof effect of gas explosion pressure and has a retarding effect on gas explosion energy transfer, so that the safety performance of the test system is improved.
As an example, the explosion-proof electromagnetic module 13 is disposed between the pressure reducing module 11 and the first unidirectional control module 121. Specifically, the explosion-proof electromagnetic module 13 is an explosion-proof electromagnetic valve.
In an alternative embodiment, to facilitate control of the gas flow during cell testing, flow testing modules 14 are provided on the first and second conduits.
In an alternative embodiment, in order to adjust the gas humidity required during the cell test, a first humidification module 151 and a second humidification module 152 may be further provided on the first pipe and the second pipe, respectively.
As an example, the first humidification module 151 and the first buffer module 201 are connected in parallel, and one end of the first humidification module is connected through a three-way proportional valve 16, after hydrogen gas flows through the three-way proportional valve 16 on a first pipeline, a part of hydrogen gas is humidified by the first humidification module 151, another part of hydrogen gas directly passes through the first buffer module 201 without passing through the first humidification module 151, and then is merged at the three-way proportional valve 16 at an outlet, and the gas humidity of the hydrogen gas is controlled by mixing dry gas and wet gas, and similarly, the second humidification module 152 and the second buffer module 202 are connected in parallel and communicated, and the gas humidity of air is controlled by mixing the dry gas and the wet gas.
In an alternative embodiment, the fuel cell testing system is used for testing the fuel cell as follows:
step 1: in the testing process of the single fuel cell, the third gas module 103 provides rare gas to the first buffer module 201 and the hydrogen cavity 301, and removes the original gas in the first buffer module 201 and the hydrogen cavity 301;
step 2: the hydrogen supply module 101 inputs hydrogen into the first pipeline, the pressure of the hydrogen in the first pipeline is adjusted through the pressure reduction module 11, the explosion-proof electromagnetic module 13 is opened, the hydrogen flows through the first one-way control module 121 from the explosion-proof electromagnetic module 13, then is shunted through the three-way proportional valve 16, one part of the hydrogen is humidified through the first humidification module 151, the other part of the hydrogen is buffered through the first buffer module 201, and finally enters the single cell 4 to be tested for reaction after being mixed; the air supply module 102 inputs air into the second pipeline, the air flows through the second one-way control module 122, then is shunted through the three-way proportional valve 16, one part of the air is humidified through the second humidification module 152, the other part of the air is buffered through the second buffer module 202, and finally enters the single cell 4 to be tested for reaction after being mixed;
and 3, step 3: the temperature required for the reaction is controlled during the test by heating module 60,
and 4, step 4: the current generated during the test is dissipated through the electronic load module 50.
The fuel cell testing system provided by the application is applied to the field of testing of fuel cells and comprises a cell clamp, a gas supply module, a buffer module and a gas cavity; the buffer module is respectively connected in series and communicated with the gas supply module and the single cell clamp, the gas cavity is respectively connected in series and communicated with the gas supply module and the single cell clamp, and the buffer module is connected in parallel and communicated with the gas cavity; the gas supply module is used for supplying gas to the buffer module and the gas cavity; the buffer module is used for buffering the gas pressure of the gas cavity so as to maintain the gas pressure in the gas cavity within a preset pressure range; the single cell clamp is used for forming a single cell to be tested with the membrane electrode and testing the single cell to be tested through the buffer module and gas transmitted by the gas cavity. This application is parallelly connected and UNICOM through increasing buffer module and gas cavity, makes gas cavity's pressure maintain at the preset pressure scope to make battery test process normal clear, and then obtain the higher battery performance data of precision.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. A fuel cell testing system is characterized by comprising a cell clamp (40), a gas supply module (10), a buffer module (20) and a gas cavity (30); the buffer module (20) is connected in series and communicated with the gas supply module (10) and the single cell clamp (40), the gas cavity (30) is connected in series and communicated with the gas supply module (10) and the single cell clamp (40), and the buffer module (20) is connected in parallel and communicated with the gas cavity (30);
the gas supply module (10) is used for providing gas for the buffer module (20) and the gas cavity (30);
the buffer module (20) is used for buffering the gas pressure of the gas cavity (30) so as to maintain the gas pressure in the gas cavity (30) within a preset pressure range;
the single cell clamp (40) is used for forming a single cell (4) to be tested with a membrane electrode, and is used for testing the single cell (4) to be tested through the gas transmitted by the buffer module (20) and the gas cavity (30).
2. The fuel cell testing system according to claim 1, wherein the gas supply module (10) comprises a hydrogen supply module (101) and an air supply module (102), the buffer module (20) comprises a first buffer module (201) and a second buffer module (202), and the gas chamber (30) comprises a hydrogen chamber (301) and an air chamber (302);
the first buffer module (201) is connected in series and communicated with the hydrogen supply module (101) and the cell clamp (40) through a first pipeline respectively, the second buffer module (202) is connected in series and communicated with the air supply module (102) and the cell clamp (40) through a second pipeline respectively, the first buffer module (201) is connected in parallel and communicated with the hydrogen cavity (301), and the second buffer module (202) is connected in parallel and communicated with the air cavity (302);
the hydrogen supply module (101) is used for supplying hydrogen to the first buffer module (201) and the hydrogen cavity (301);
the air supply module (102) is used for providing air for the second buffer module (202) and the air cavity (302);
the first buffer module (201) is used for buffering the gas pressure of the hydrogen cavity (301) so as to maintain the gas pressure in the hydrogen cavity (301) within a preset pressure range;
the second buffer module (201) is used for buffering the gas pressure of the air cavity (302) so that the gas pressure in the air cavity (302) is maintained in a preset pressure range.
3. The fuel cell testing system according to claim 2, characterized in that the gas supply module (10) further comprises a third gas supply module (103), the third gas supply module (103) being in series and communication with the first buffer module (201) and the hydrogen chamber (301) through a third pipe, respectively;
the third gas supply module (103) is used for supplying a third gas to the first buffer module (201) and the hydrogen cavity (301) and removing the original gas in the first buffer module (201) and the hydrogen cavity (301).
4. A fuel cell testing system according to claim 3, characterized in that the system further comprises an electronic load module (50), the electronic load module (50) being connected to the positive and negative poles of the cell (4) to be tested;
the electronic load module (50) is used for consuming the current generated by the cell (4) to be tested in the test process.
5. The fuel cell testing system according to claim 4, characterized in that the system further comprises a heating module (60), the heating module (60) being fixedly connected with the cell clamp (40);
the heating module (60) is used for controlling the temperature of the single cell (4) to be tested in the testing process.
6. The fuel cell fixture (40) testing system according to claim 2, wherein a volume ratio of the first buffer module (201) to the hydrogen cavity (301) is greater than or equal to a first preset volume threshold, and a volume ratio of the second buffer module (202) to the air cavity (302) is greater than or equal to a second preset volume threshold.
7. The fuel cell testing system as claimed in claim 6, wherein a pressure reducing module (11) and a first unidirectional control module (121) are provided on the first pipe, and a second unidirectional control module (122) is provided on the second pipe;
the pressure reduction module (11) is used for adjusting the gas pressure in the first pipeline;
the first unidirectional control module (121) is used for preventing the hydrogen from flowing back and preventing the damage of the cell (4) to be tested caused by the reduction of the gas pressure in the hydrogen cavity (301);
the second unidirectional control module (122) is used for preventing the air from flowing back and preventing the gas pressure in the air cavity (301) from being reduced to cause the damage of the cell (4) to be tested.
8. The fuel cell testing system according to claim 7, characterized in that an explosion-proof electromagnetic module (13) is provided between the pressure reducing module (11) and the first unidirectional control module (121).
9. The fuel cell testing system according to claim 8, characterized in that flow rate testing modules (14) are provided on the first pipe and the second pipe;
the flow testing module (14) is used for testing the gas flow in the first pipeline and the second pipeline.
10. The fuel cell testing system according to claim 9, wherein a humidification module (15) is provided on the first pipe and the second pipe, the humidification module (15) includes a first humidification module (151) and a second humidification module (152), the first humidification module (151) is provided on the first pipe, and the first humidification module (151) is connected in parallel with the first buffer module (201), the second humidification module (152) is provided on the second pipe, and the second humidification module (152) is connected in parallel with the second buffer module (202);
the first humidification module (151) is for adjusting a gas humidity in the first duct;
the second humidification module (152) is for adjusting a gas humidity in the second conduit.
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