CN114838890A - Device and method for rapidly detecting air tightness of fuel cell - Google Patents
Device and method for rapidly detecting air tightness of fuel cell Download PDFInfo
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- CN114838890A CN114838890A CN202210553208.0A CN202210553208A CN114838890A CN 114838890 A CN114838890 A CN 114838890A CN 202210553208 A CN202210553208 A CN 202210553208A CN 114838890 A CN114838890 A CN 114838890A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
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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 device and a method for rapidly detecting the air tightness of a fuel cell, wherein the device comprises an air supply module and an external leakage test module, the air supply module, the external leakage test module and the fuel cell are sequentially communicated, the fuel cell is provided with a first air inlet, the first air inlet is communicated with a hydrogen cavity in the fuel cell, the external leakage test module comprises a rapid inflation bypass and a single-side external leakage branch, the rapid inflation bypass comprises a first bypass, the first air inlet is communicated with the air supply module through the first bypass, the first bypass is provided with a first valve, the single-side leakage branch comprises a first flow testing device and a first branch provided with a fourth valve, one end of the first branch is communicated with the first air inlet, the other end of the first branch is communicated with one end of the first flow testing device, and the other end of the first flow testing device is communicated with the air supply module. Through setting up the bypass of aerifing fast, shortened fuel cell's the time of aerifing, promote fuel cell's gas tightness detection efficiency.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a device and a method for quickly detecting the air tightness of a fuel cell.
Background
Since the fuel cell is involved in hydrogen, once the fuel cell leaks hydrogen during operation, serious consequences may be caused, and therefore, it is important to ensure the air tightness of the fuel cell before and after shipment, and therefore, a special air tightness detection device and method for the fuel cell needs to be developed.
At present, the common air tightness detection method is as follows: the air source, the stop valve, the pressure regulating valve, the flowmeter, the fuel cell and the like are connected in series by using a pipeline, the outlets of the air channel, the water channel and the hydrogen channel are blocked, the air inlet pressure is controlled by the pressure regulating valve, and the leakage amount of each channel is read by the flowmeter. When the method is used for a high-power fuel cell (the number of single cells is large), the inflation rate is low, and the air tightness detection efficiency is seriously influenced. In addition, when the single cavity is measured by the method, the rest cavities are not pressurized, the pressure difference exists between the cavity to be measured and the cavity not to be measured, the airtightness measurement precision of the single cavity is influenced, and the proton exchange membrane of the fuel cell has the risk of crushing.
Therefore, it is necessary to provide a device for rapidly detecting the airtightness of a fuel cell, which can improve the airtightness detection efficiency, ensure the pressure balance between the cavities in the single-cavity airtightness detection process, and improve the single-cavity airtightness test precision, so as to solve the above technical problems.
Disclosure of Invention
In order to solve the technical problem, the invention provides a device for rapidly detecting the air tightness of a fuel cell. The problems that the inflation speed is low and the air tightness detection efficiency is low in the prior art are solved; the technical problem that the airtightness testing precision of the single cavity is influenced by the pressure difference between the cavity to be tested and the cavity not to be tested.
The technical effects of the invention are realized as follows:
a quick detection device for the air tightness of a fuel cell is used for detecting the air tightness of the fuel cell and comprises an air supply module and an external leakage test module, the gas supply module, the external leakage testing module and the fuel cell are communicated in sequence, the external leakage testing module comprises a quick inflation bypass and a single-side external leakage branch, the quick inflation bypass comprises a first bypass, the first air inlet is communicated with the air supply module through the first bypass, the first bypass is provided with a first valve, the single-side leakage branch comprises a first flow testing device and a first branch, one end of the first branch is communicated with the first air inlet, the other end of the first branch is communicated with one end of the first flow testing device, the other end of the first flow testing device is communicated with the air supply module, and a fourth valve is arranged on the first branch.
Further, fuel cell still is equipped with the second air inlet, the second air inlet with the inside water cavity intercommunication of fuel cell, the quick inflation bypass still includes the second bypass, the second air inlet passes through the second bypass with air feed module intercommunication, be equipped with the second valve on the second bypass, the unilateral leaks the branch road outward and still includes the second branch road, the one end of second branch road with the second air inlet intercommunication, the other end of second branch road with first flow test device keeps away from air feed module one end intercommunication, be equipped with the fifth valve on the second branch road.
Further, fuel cell still is equipped with the third air inlet, the third air inlet with the inside cavity intercommunication of fuel cell, the quick inflation bypass still includes the third bypass, the third air inlet passes through the third bypass with air feed module intercommunication, be equipped with the third valve on the third bypass, the branch road that leaks outward of unilateral still includes the third branch road, the one end of third branch road with third air inlet intercommunication, the other end of third branch road with first class test device keeps away from air feed module one end intercommunication, be equipped with the sixth valve on the third branch road. Through setting up the bypass of aerifing fast, shortened the time of aerifing of inside hydrogen chamber, water cavity and cavity of fuel cell, promote fuel cell's gas tightness detection efficiency, especially when carrying out the gas tightness to the high power fuel cell that has the more of monocell and examine, can reduce test time by a wide margin, be convenient for detect it in batches.
Further, the air feed module includes air feed branch road, seventh valve and relief pressure valve, the seventh valve with the relief pressure valve is all located on the air feed branch road, the air feed branch road is used for supplying with the air supply of external input extremely leak test module.
Further, the fuel cell is also provided with a first air outlet, a second air outlet and a third air outlet, the first air outlet is communicated with the hydrogen cavity inside the fuel cell, the second air outlet is communicated with the water cavity inside the fuel cell, and the third air outlet is communicated with the cavity inside the fuel cell.
The system further comprises a series leakage testing module, wherein the series leakage testing module comprises a second flow testing device, a fourth branch, a fifth branch and a sixth branch, one end of the fourth branch, one end of the fifth branch and one end of the sixth branch are communicated with the first gas outlet, the second gas outlet and the third gas outlet which are in one-to-one correspondence respectively, the other ends of the fourth branch, the fifth branch and the sixth branch are communicated with the second flow testing device respectively, and the hydrogen cavity, the water cavity and the cavity are communicated in pairs respectively. Through setting up the string leak test module, airtight string leak test is accomplished to three other gas outlets that use fuel cell, make the quick detection device of fuel cell gas tightness of this application make full use of fuel cell's all imports and exports, and, airtight string leak test adopts the string leak test module to accomplish the test, the airtight outer test that leaks of collocation unilateral, three chamber airtight outer test adopts outer test module to accomplish the test, when making the different gas tightness test processes of switching, and easy operation is favorable to improving efficiency of software testing, and simultaneously, airtight string leak test can not disturb between two other gas tightness tests, be favorable to promoting the gas tightness and detect the precision.
Further, the first flow rate testing device and the second flow rate testing device are both flow meters.
In addition, a method for rapidly detecting the air tightness of the fuel cell is also provided, and the method is realized based on the device for rapidly detecting the air tightness of the fuel cell, and comprises the following steps:
adjusting the pressure reducing valve to a first preset value, opening the seventh valve, the first valve, the second valve and the third valve, and controlling other valves to be in a closed state so as to simultaneously inflate a hydrogen cavity, a water cavity and a cavity in the fuel cell;
when the reading of the pressure reducing valve is stabilized at a first preset value, closing the first valve and opening the fourth valve;
when the reading of the first flow testing device is stable, recording the reading of the first flow testing device at the moment to obtain the leakage value of the hydrogen cavity;
closing the fourth valve and opening the first valve;
when the reading of the pressure reducing valve is stabilized at a first preset value, closing the second valve and opening the fifth valve;
when the reading of the first flow testing device is stable, recording the reading of the first flow testing device at the moment to obtain the leakage value outside the water cavity;
closing the fifth valve and opening the second valve;
when the reading of the pressure reducing valve is stabilized at the first preset value, closing the third valve and opening the sixth valve;
when the reading of the first flow testing device is stable, recording the reading of the first flow testing device at the moment to obtain a cavity leakage value;
and closing the seventh valve, the first valve, the second valve and the third valve to finish the single-cavity airtight external leakage test. When the airtight external leakage of single chamber tests, through inflating pressurization to hydrogen chamber, water cavity and cavity simultaneously, guaranteed the pressure balance of three chambeies, avoided adopting to pressurize the test chamber, when not surveying the airtight external leakage test of single chamber of the not pressurized mode in chamber, there is pressure differential between test chamber and the not survey chamber, proton exchange membrane has the pressure break risk, causes easily that fuel cell leaks in, leads to leaking the measured value inaccurate, influences the airtight test precision problem of single chamber.
Further, still include:
adjusting the pressure reducing valve to a second preset value, opening the seventh valve, the first valve, the second valve and the third valve, and controlling other valves to be in a closed state so as to simultaneously inflate a hydrogen cavity, a water cavity and a cavity in the fuel cell;
when the reading of the pressure reducing valve is stabilized at a second preset value, simultaneously opening a fourth valve, a fifth valve and a sixth valve;
when the indication number of the first flow testing device is stable, recording the reading number of the first flow testing device at the moment to obtain the total leakage value of the hydrogen cavity, the water cavity and the cavity;
and closing the seventh valve, the first valve, the second valve and the third valve to finish the three-cavity airtight external leakage test. Through setting up a plurality of valves that the branch road corresponds are leaked outward to quick inflation bypass, unilateral for through the different compound mode between a plurality of valves that first flow detection device and unilateral leak the branch road and correspond, can realize leaking the test outward to fuel cell's single chamber airtight and three chamber airtight, satisfy the demand of different gas tightness tests.
Further, still include:
adjusting the pressure reducing valve to a third preset value, opening the seventh valve and the first valve, and controlling other valves to be in a closed state so as to charge a hydrogen cavity in the fuel cell;
when the reading of the pressure reducing valve is stabilized at a third preset value, opening a ninth valve;
when the reading of the second flow testing device is stable, recording the reading of the second flow testing device at the moment to obtain the hydrogen water serial leakage value, and closing the ninth valve;
opening the tenth valve;
when the reading of the second flow testing device is stable, recording the reading of the second flow testing device at the moment to obtain a hydrogen empty string leakage value, and closing the tenth valve;
opening a second valve to charge a water cavity inside the fuel cell;
when the reading of the pressure reducing valve is stabilized at a third preset value, opening an eighth valve;
when the reading of the second flow testing device is stable, recording the reading of the second flow testing device at the moment to obtain a water-hydrogen serial leakage value, and closing the eighth valve;
opening the tenth valve;
when the reading of the second flow testing device is stable, recording the reading of the second flow testing device at the moment to obtain a water empty string leakage value, and closing the tenth valve;
opening a second valve to charge the cavity inside the fuel cell;
when the reading of the pressure reducing valve is stabilized at a third preset value, opening an eighth valve;
when the reading of the second flow testing device is stable, recording the reading of the second flow testing device at the moment to obtain an air-hydrogen serial leakage value, and closing the eighth valve;
opening the ninth valve;
when the reading of the second flow testing device is stable, recording the reading of the second flow testing device at the moment to obtain an empty water leakage value;
and closing the seventh valve and the ninth valve to complete the airtight series leakage test.
As described above, the present invention has the following advantageous effects:
1) through setting up the bypass of aerifing fast, shortened the time of aerifing of inside hydrogen chamber, water cavity and cavity of fuel cell, promote fuel cell's gas tightness detection efficiency, especially when carrying out the gas tightness to the high power fuel cell that has the more of monocell and examine, can reduce test time by a wide margin, be convenient for detect it in batches.
2) Through setting up the string leak test module, airtight string leak test is accomplished to three other gas outlets that use fuel cell, make the quick detection device of fuel cell gas tightness of this application make full use of fuel cell's all imports and exports, and, airtight string leak test adopts the string leak test module to accomplish the test, the airtight outer test that leaks of collocation unilateral, three chamber airtight outer test adopts outer test module to accomplish the test, when making the different gas tightness test processes of switching, and easy operation is favorable to improving efficiency of software testing, and simultaneously, airtight string leak test can not disturb between two other gas tightness tests, be favorable to promoting the gas tightness and detect the precision.
3) When the airtight external leakage of single chamber tests, through inflating pressurization to hydrogen chamber, water cavity and cavity simultaneously, guaranteed the pressure balance of three chambeies, avoided adopting to pressurize the test chamber, when not surveying the airtight external leakage test of single chamber of the not pressurized mode in chamber, there is pressure differential between test chamber and the not survey chamber, proton exchange membrane has the pressure break risk, causes easily that fuel cell leaks in, leads to leaking the measured value inaccurate, influences the airtight test precision problem of single chamber.
4) Through setting up a plurality of valves that the branch road corresponds are leaked outward to quick inflation bypass, unilateral for through the different compound mode between a plurality of valves that first flow detection device and unilateral leak the branch road and correspond, can realize leaking the test outward to fuel cell's single chamber airtight and three chamber airtight, satisfy the demand of different gas tightness tests.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment 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 invention, and that for a person skilled in the art it is also possible to derive other drawings from these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a rapid detection device for fuel cell air tightness according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of a single-chamber hermetic leakage testing method for a fuel cell according to an embodiment of the present disclosure;
FIG. 3 is a flow chart of a three-chamber air-tight external leakage testing method for a fuel cell according to an embodiment of the present disclosure;
fig. 4 is a flowchart of a method for testing a fuel cell for air-tight string leakage according to an embodiment of the present disclosure.
Wherein the reference numerals in the figures correspond to:
the device comprises an air supply module 1, an external leakage testing module 2, a fuel cell 3, a hydrogen cavity 31, a water cavity 32, a cavity 33, a serial leakage testing module 4, a first flow testing device 5, a first valve 6, a second valve 7, a third valve 8, a fourth valve 9, a fifth valve 10, a sixth valve 11, a seventh valve 12, a pressure reducing valve 13, a second flow testing device 14, an eighth valve 15, a ninth valve 16 and a tenth valve 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention 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 invention 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 apparatus 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.
Example 1:
as shown in fig. 1, an embodiment of the present specification provides a device for rapidly detecting air tightness of a fuel cell, which is used for detecting air tightness of a fuel cell 3, and includes an air supply module 1 and an external leakage test module 2, the air supply module 1, the external leakage test module 2 and the fuel cell 3 are sequentially communicated, the external leakage test module 2 includes a rapid air inflation bypass and a one-side external leakage branch, the rapid air inflation bypass includes a first bypass, a first air inlet is communicated with the air supply module 1 through the first bypass, a first valve 6 is disposed on the first bypass, the one-side external leakage branch includes a first flow rate test device 5 and a first branch, one end of the first branch is communicated with the first air inlet, the other end of the first branch is communicated with one end of the first flow rate test device 5, the other end of the first flow rate test device 5 is communicated with the air supply module 1, a fourth valve 9 is disposed on the first branch, the air supply module 1 includes an air supply branch, Seventh valve 12 and relief pressure valve 13, seventh valve 12 and relief pressure valve 13 all locate on the air feed branch way, and the air feed branch way is used for supplying the air supply of external input to outer hourglass test module 2. Wherein the first flow testing device 5 is a flow meter.
Preferably, fuel cell 3 still is equipped with the second air inlet, the inside water cavity 32 intercommunication of second air inlet and fuel cell 3, the bypass of aerifing fast still includes the second bypass, the second air inlet passes through second bypass and air feed module 1 intercommunication, be equipped with second valve 7 on the second bypass, the unilateral leaks the branch road outward and still includes the second branch road, the one end and the second air inlet intercommunication of second branch road, the other end and the first flow testing device 5 of second branch road keep away from air feed module 1 one end intercommunication, be equipped with fifth valve 10 on the second branch road.
Preferably, fuel cell 3 still is equipped with the third air inlet, and the inside cavity 33 intercommunication of third air inlet and fuel cell 3, the bypass of aerifing fast still includes the third bypass, and the third air inlet passes through third bypass and air feed module 1 intercommunication, is equipped with third valve 8 on the third bypass, and the outer branch road that leaks of unilateral still includes the third branch road, and the one end and the third air inlet intercommunication of third branch road, the other end and the first flow testing arrangement 5 of third branch road keep away from air feed module 1 one end intercommunication, is equipped with sixth valve 11 on the third branch road.
Specifically, the single-chamber airtight external leakage test and the three-chamber airtight external leakage test can be completed by the gas supply module 1, the external leakage test module 2, and the fuel cell 3.
In a first embodiment, the single-chamber hermetic leak test includes a hydrogen chamber hermetic leak test, a water chamber hermetic leak test, and a cavity hermetic leak test. The single-cavity airtight external leakage test is respectively completed by measuring the external leakage value of the hydrogen cavity 31, the external leakage value of the water cavity 32 and the external leakage value of the cavity 33.
Firstly, the testing process of the airtight leakage test of the hydrogen cavity is as follows:
adjusting the pressure reducing valve 13 to a first preset value, opening the seventh valve 12, the first valve 6, the second valve 7 and the third valve 8, and controlling other valves to be in a closed state so as to simultaneously charge the hydrogen cavity 31, the water cavity 32 and the cavity 33 inside the fuel cell 3;
when the reading of the pressure reducing valve 13 is stabilized at the first preset value, the first valve 6 is closed, and the fourth valve 9 is opened;
when the reading of the first flow test device 5 is stable, recording the reading of the first flow test device 5 at the moment to obtain the leakage value of the hydrogen cavity 31;
the fourth valve 9 is closed and the first valve 6 is opened.
Specifically, the first valve 6 is opened in the last step in order to immediately complete the next single-chamber airtight leakage test, i.e., the water chamber airtight leakage test or the cavity airtight leakage test. Because, generally, the single-chamber airtight leakage test corresponding to the hydrogen chamber 31, the water chamber 32 and the cavity 33 is performed in sequence in the same measurement process, when the single-chamber airtight leakage test is started, and the fuel cell 3 completes the rapid inflation, after one chamber is tested, the gas body does not need to be discharged for inflation, and only when the previous chamber is measured, the valve which is closed correspondingly is opened, and the opened valve is closed, the whole rapid inflation bypass can still be in the rapid inflation state, so that the airtightness test of the next chamber is facilitated. If the subsequent water cavity airtight leakage test or cavity airtight leakage test is not needed, the first valve 6 is opened instead of being closed in the last step.
It should be noted that, during the single-chamber airtight external leakage test, the hydrogen chamber 31, the water chamber 32 and the cavity 33 are simultaneously inflated and pressurized, so that the pressure balance of the three chambers is ensured, and the problems that the single-chamber airtight external leakage test precision is influenced due to inaccurate external leakage measurement value caused by the pressure difference between the test chamber and the untested chamber and the danger that the proton exchange membrane is crushed to cause the internal leakage of the fuel cell 3 when the single-chamber airtight external leakage test is performed in a manner that the test chamber is pressurized and the untested chamber is not pressurized are avoided.
Secondly, the testing process of the airtight leakage test of the water cavity is as follows:
when the reading of the pressure reducing valve 13 is stabilized at the first preset value, the second valve 7 is closed, and the fifth valve 10 is opened;
when the reading of the first flow testing device 5 is stable, recording the reading of the first flow testing device 5 at the moment to obtain the leakage value of the water cavity 32;
the fifth valve 10 is closed and the second valve 7 is opened.
Specifically, as can be seen from the above-mentioned testing procedure of the hydrogen chamber airtight leakage test, after the testing process of the hydrogen chamber airtight leakage test is completed, the whole fast inflation bypass is still in the fast inflation state, and therefore, it is no longer necessary to perform the steps of adjusting the pressure reducing valve 13 to the first preset value and simultaneously inflating the hydrogen chamber 31, the water chamber 32 and the cavity 33 inside the fuel cell 3, as in the case of the initial start of the hydrogen chamber airtight leakage test.
Thirdly, the testing process of the air-tight leakage test of the cavity is as follows:
when the reading of the pressure reducing valve 13 is stabilized at the first preset value, closing the third valve 8 and opening the sixth valve 11;
when the reading of the first flow test device 5 is stable, recording the reading of the first flow test device 5 at the moment to obtain the leakage value of the cavity 33;
if no other test is available, the seventh valve 12, the first valve 6, the second valve 7 and the third valve 8 are closed to complete the single-chamber airtight leakage test.
In the second embodiment, the three-chamber airtight external leakage test is performed by measuring the total external leakage value of the three chambers, i.e., the hydrogen chamber 31, the water chamber 32, and the cavity 33.
Specifically, the three-cavity airtight external leakage test process is as follows:
adjusting the pressure reducing valve 13 to a second preset value, opening the seventh valve 12, the first valve 6, the second valve 7 and the third valve 8, and controlling other valves to be in a closed state so as to simultaneously charge the hydrogen cavity 31, the water cavity 32 and the cavity 33 inside the fuel cell 3;
when the reading of the pressure reducing valve 13 is stabilized at a second preset value, simultaneously opening the fourth valve 9, the fifth valve 10 and the sixth valve 11;
when the reading of the first flow test device 5 is stable, recording the reading of the first flow test device 5 at the moment to obtain the total leakage value of the hydrogen cavity 31, the water cavity 32 and the cavity 33;
and closing the seventh valve 12, the first valve 6, the second valve 7 and the third valve 8 to complete the three-cavity airtight external leakage test.
It should be noted that, in the prior art, the gas source, the flow meter and the gas inlet of the gas cell are connected in series to complete the gas charging process of the gas cell and the gas flow rate testing process, however, the flow resistance of the flow meter is large, so that the gas charging time of the gas cell will last for a long time to reach the gas pressure required by the gas tightness test, and the longer the power of the fuel cell is, the longer the gas charging time is, and the lower the gas tightness test efficiency is.
Therefore, this application is parallelly connected on the branch that first flow test device 5 and unilateral leak the branch road and be connected the constitution and has been introduced the quick inflation bypass, each bypass of quick inflation bypass is parallelly connected respectively on each branch that unilateral leaks the branch road and correspond outward, each bypass one end and the air feed module 1 intercommunication of quick inflation bypass, the air inlet intercommunication that the other end and gas cell module 3 correspond, when the gas tightness measurement begins, inflate the inside corresponding cavity of fuel cell 3 through the bypass earlier, close the bypass after being full of, and open the branch road that corresponds and measure the gas tightness. The air inflation time of the air tightness test of the same fuel cell 3 according to the connection mode of the application can be approximately shortened to 1/4 of the air inflation time of the air tightness test according to the connection mode in the prior art, and the air tightness test efficiency is greatly improved.
In addition, the method for rapidly charging the bypass is particularly suitable for the airtightness test of the high-power fuel cell, and the airtightness test is required to be performed on the fuel cell in the production link, so that the production time of the high-power fuel cell can be greatly shortened by the method for rapidly charging the bypass in the application when the high-power fuel cell is produced in a large scale.
Preferably, the fuel cell 3 is further provided with a first air outlet, a second air outlet and a third air outlet, wherein the first air outlet is communicated with a hydrogen cavity 31 inside the fuel cell 3, the second air outlet is communicated with a water cavity 32 inside the fuel cell 3, and the third air outlet is communicated with a cavity 33 inside the fuel cell 3.
Preferably, the leakage testing device further comprises a leakage testing module 4, the leakage testing module 4 comprises a second flow testing device 14, a fourth branch, a fifth branch and a sixth branch, one end of the fourth branch, one end of the fifth branch and one end of the sixth branch are communicated with the first air outlet, the second air outlet and the third air outlet which are in one-to-one correspondence respectively, the other end of the fourth branch, the other end of the fifth branch and the other end of the sixth branch are communicated with the second flow testing device 14, the fourth branch, the fifth branch and the sixth branch are respectively provided with an eighth valve 15, a ninth valve 16 and a tenth valve 17 which are in one-to-one correspondence respectively, and the hydrogen cavity 31, the water cavity 32 and the cavity 33 are respectively communicated in pairs. Wherein the second flow testing device 14 is a flow meter.
Specifically, the airtight series leak test can be completed by the gas supply module 1, the series leak test module 4, and the fuel cell 3. The hermetic leakage refers to leakage between any two of the three chambers, namely the hydrogen chamber 31, the water chamber 32 and the oxygen chamber 33.
In a specific embodiment, the airtight string leakage test comprises a hydrogen cavity string leakage test, a water cavity airtight external leakage test and a cavity airtight external leakage test. Wherein, the hydrogen cavity leakage comprises the leakage of the hydrogen cavity 31 to the water cavity 32 and the leakage of the hydrogen cavity 31 to the cavity 33; the water cavity leakage comprises the leakage of the water cavity 32 to the hydrogen cavity 31 and the leakage of the water cavity 32 to the cavity 33; the cavity cross leak includes a cavity 33 to the hydrogen cavity 31 and a cavity 33 to the water cavity 32.
Firstly, the testing process of the hydrogen cavity series leakage test is as follows:
adjusting the pressure reducing valve 13 to a third preset value, opening the seventh valve 12 and the first valve 6, and controlling other valves to be in a closed state so as to charge the hydrogen cavity 31 inside the fuel cell 3;
when the reading of the pressure reducing valve 13 is stabilized at the third preset value, the ninth valve 16 is opened;
when the reading of the second flow testing device 14 is stable, recording the reading of the second flow testing device 14 at this time to obtain a hydrogen water serial leakage value, and closing the ninth valve 16;
opening the tenth valve 17;
secondly, the test process of the water cavity leakage test is as follows:
when the reading of the second flow testing device 14 is stable, recording the reading of the second flow testing device 14 at the moment to obtain a hydrogen empty string leakage value, and closing the tenth valve 17;
opening the second valve 7 to charge the water chamber 32 inside the fuel cell 3;
when the reading of the pressure reducing valve 13 is stabilized at the third preset value, the eighth valve 15 is opened;
when the reading of the second flow testing device 14 is stable, recording the reading of the second flow testing device 14 at the moment to obtain a water-hydrogen serial leakage value, and closing the eighth valve 15;
opening the tenth valve 17;
thirdly, the testing process of the cavity string leakage test is as follows:
when the reading of the second flow testing device 14 is stable, recording the reading of the second flow testing device 14 at the moment to obtain a water empty string leakage value, and closing the tenth valve 17;
opening the second valve 7 to charge the cavity 33 inside the fuel cell 3;
when the reading of the pressure reducing valve 13 is stabilized at the third preset value, the eighth valve 15 is opened;
when the reading of the second flow testing device 14 is stable, recording the reading of the second flow testing device 14 at the moment to obtain an air-hydrogen serial leakage value, and closing the eighth valve 15;
opening the ninth valve 16;
when the indication number of the second flow testing device 14 is stable, recording the reading number of the second flow testing device 14 at the moment to obtain an empty water leakage value;
if there are no other tests, the seventh valve 12 and the ninth valve 16 are closed to complete the hermetic series leak test.
It should be noted that, through setting up string leakage test module 4, make to use other three gas outlets of fuel cell 3 to accomplish airtight string leakage test, make the quick detection device of fuel cell gas tightness of this application make full use of all exits and inlets of fuel cell 3, and, airtight string leakage test adopts string leakage test module to accomplish the test, collocation unilateral airtight external leakage test, three-chamber airtight external leakage test adopts external leakage test module to accomplish the test, when making the different gas tightness test process of switching, and easy operation is favorable to improving test efficiency, and simultaneously, airtight string leakage test can not disturb between two other gas tightness tests, be favorable to promoting gas tightness detection precision.
In the embodiment of the present application, the first preset value, the second preset value and the third preset value are generally different and can be set by a person skilled in the art according to the power of the fuel cell 3 or the air tightness test requirement.
As shown in fig. 2, the present specification further provides a method for rapidly detecting the air tightness of a fuel cell, which is implemented based on the apparatus for rapidly detecting the air tightness of a fuel cell in example 1, and includes:
s101, adjusting the pressure reducing valve 13 to a first preset value, opening the seventh valve 12, the first valve 6, the second valve 7 and the third valve 8, and controlling other valves to be in a closed state so as to simultaneously charge the hydrogen cavity 31, the water cavity 32 and the cavity 33 in the fuel cell 3;
s102, when the reading of the pressure reducing valve 13 is stabilized at a first preset value, closing the first valve 6 and opening the fourth valve 9;
s103, recording the reading of the first flow testing device 5 at the moment to obtain the leakage value of the hydrogen cavity 31 after the reading of the first flow testing device 5 is stable;
s104, closing the fourth valve 9 and opening the first valve 6;
s105, when the reading of the pressure reducing valve 13 is stabilized at a first preset value, closing the second valve 7 and opening the fifth valve 10;
s106, recording the reading of the first flow testing device 5 at the moment to obtain the leakage value of the water cavity 32 after the reading of the first flow testing device 5 is stable;
s107, closing the fifth valve 10 and opening the second valve 7;
s108, when the reading of the pressure reducing valve 13 is stabilized at a first preset value, closing the third valve 8 and opening the sixth valve 11;
s109, recording the reading of the first flow testing device 5 at the moment to obtain the leakage value of the cavity 33 after the reading of the first flow testing device 5 is stable;
and S110, closing the seventh valve 12, the first valve 6, the second valve 7 and the third valve 8 to finish the single-cavity airtight leakage test.
Preferably, as shown in fig. 3, the method for rapidly detecting the airtightness of the fuel cell further comprises:
s201, adjusting the pressure reducing valve 13 to a second preset value, opening the seventh valve 12, the first valve 6, the second valve 7 and the third valve 8, and controlling other valves to be in a closed state so as to simultaneously charge the hydrogen cavity 31, the water cavity 32 and the cavity 33 in the fuel cell 3;
s212, when the indication number of the reducing valve 13 is stabilized at a second preset value, simultaneously opening a fourth valve 9, a fifth valve 10 and a sixth valve 11;
s203, recording the reading of the first flow testing device 5 at the moment after the reading of the first flow testing device 5 is stable so as to obtain the total leakage value of the hydrogen cavity 31, the water cavity 32 and the cavity 33;
and S204, closing the seventh valve 12, the first valve 6, the second valve 7 and the third valve 8 to finish the three-cavity airtight external leakage test.
Through setting up a plurality of valves that the bypass of aerifing fast, the branch road leaks outside the unilateral, first flow detection device 5 and the branch road corresponds outside the unilateral for through the different compound mode between a plurality of valves that first flow detection device 5 and the branch road that leaks outside the unilateral correspond, can realize leaking the test outside single chamber airtight of fuel cell 3 and leak the test outside three chamber airtight, satisfied the demand of different gas tightness tests.
As shown in fig. 4, another method for rapidly detecting the airtightness of the fuel cell is provided in the embodiments of this specification, where the method is implemented based on the apparatus for rapidly detecting the airtightness of the fuel cell in embodiment 1, and includes:
s301, adjusting the pressure reducing valve 13 to a third preset value, opening the seventh valve 12 and the first valve 6, and controlling other valves to be in a closed state so as to charge the hydrogen cavity 31 in the fuel cell 3;
s302, when the indication number of the pressure reducing valve 13 is stabilized at a third preset value, opening a ninth valve 16;
s303, recording the reading of the second flow testing device 14 at the moment to obtain a hydrogen water leakage value after the reading of the second flow testing device 14 is stable, and closing the ninth valve 16;
s304, opening the tenth valve 17;
s305, after the indication number of the second flow testing device 14 is stable, recording the reading number of the second flow testing device 14 at the moment to obtain a hydrogen empty serial leakage value, and closing the tenth valve 17;
s306, opening the second valve 7 to charge the water cavity 32 in the fuel cell 3;
s307, when the reading of the pressure reducing valve 13 is stabilized at a third preset value, the eighth valve 15 is opened;
s308, recording the reading of the second flow testing device 14 at the moment to obtain a water-hydrogen serial leakage value after the reading of the second flow testing device 14 is stable, and closing the eighth valve 15;
s309, opening the tenth valve 17;
s310, recording the reading of the second flow testing device 14 at the moment to obtain a water empty leakage value after the reading of the second flow testing device 14 is stable, and closing the tenth valve 17;
s311, opening the second valve 7 to charge the cavity 33 in the fuel cell 3;
s312, when the indication number of the reducing valve 13 is stabilized at a third preset value, the eighth valve 15 is opened;
s313, after the reading of the second flow testing device 14 is stable, recording the reading of the second flow testing device 14 at the moment to obtain an air-hydrogen leakage value, and closing the eighth valve 15;
s314, opening the ninth valve 16;
s315, recording the reading of the second flow testing device 14 at the moment to obtain an empty water leakage value after the reading of the second flow testing device 14 is stable;
and S316, closing the seventh valve 12 and the ninth valve 16 to finish the airtight series leakage test.
Although the present invention has been described by way of preferred embodiments, the present invention is not limited to the embodiments described herein, and various changes and modifications may be made without departing from the scope of the present invention.
The embodiments and features of the embodiments described herein above can be combined with each other without conflict.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. The utility model provides a quick detection device of fuel cell gas tightness for detect the gas tightness of fuel cell (3), its characterized in that, including air feed module (1) and outer test module (2) that leaks, air feed module (1), outer test module (2) that leaks and fuel cell (3) communicate in proper order, fuel cell (3) are equipped with first air inlet, first air inlet with the inside hydrogen chamber (31) intercommunication of fuel cell (3), outer test module (2) that leaks includes quick inflation bypass and unilateral outer branch road that leaks, quick inflation bypass includes first bypass, first air inlet pass through first bypass with air feed module (1) intercommunication, be equipped with first valve (6) on the first bypass, unilateral outer branch road that leaks includes first flow test device (5) and first branch road, the one end of first branch road with first air inlet intercommunication, the other end of first branch road with first flow test device (5) one end intercommunication, the other end of first flow test device (5) with air feed module (1) intercommunication, be equipped with fourth valve (9) on the first branch road.
2. The device for rapidly detecting the airtightness of the fuel cell according to claim 1, wherein the fuel cell (3) is further provided with a second air inlet, the second air inlet is communicated with a water cavity (32) inside the fuel cell (3), the rapid air inflation bypass further comprises a second bypass, the second air inlet is communicated with the air supply module (1) through the second bypass, the second bypass is provided with a second valve (7), the one-side leakage branch further comprises a second branch, one end of the second branch is communicated with the second air inlet, the other end of the second branch is communicated with one end, away from the air supply module (1), of the first flow testing device (5), and the second branch is provided with a fifth valve (10).
3. The device for rapidly detecting the airtightness of the fuel cell according to claim 2, wherein the fuel cell (3) is further provided with a third air inlet, the third air inlet is communicated with the cavity (33) inside the fuel cell (3), the rapid inflation bypass further comprises a third bypass, the third air inlet is communicated with the air supply module (1) through the third bypass, a third valve (8) is arranged on the third bypass, the one-side leakage branch further comprises a third branch, one end of the third branch is communicated with the third air inlet, the other end of the third branch is communicated with one end of the first flow testing device (5) far away from the air supply module (1), and a sixth valve (11) is arranged on the third branch.
4. The device for rapidly detecting the airtightness of the fuel cell according to claim 3, wherein the gas supply module (1) comprises a gas supply branch, a seventh valve (12) and a pressure reducing valve (13), the seventh valve (12) and the pressure reducing valve (13) are both disposed on the gas supply branch, and the gas supply branch is used for supplying an externally input gas source to the external leakage test module (2).
5. The device for rapidly detecting the airtightness of the fuel cell according to claim 4, wherein the fuel cell (3) is further provided with a first gas outlet, a second gas outlet and a third gas outlet, the first gas outlet is communicated with a hydrogen chamber (31) inside the fuel cell (3), the second gas outlet is communicated with a water chamber (32) inside the fuel cell (3), and the third gas outlet is communicated with a cavity (33) inside the fuel cell (3).
6. The device for the rapid detection of the airtightness of a fuel cell according to claim 5, further comprising a string leak test module (4), the series leakage testing module (4) comprises a second flow testing device (14), a fourth branch, a fifth branch and a sixth branch, one end of the fourth branch, one end of the fifth branch and one end of the sixth branch are respectively communicated with the first air outlet, the second air outlet and the third air outlet which are in one-to-one correspondence, the other ends of the fourth branch, the fifth branch and the sixth branch are communicated with the second flow testing device (14), the fourth branch, the fifth branch and the sixth branch are respectively provided with an eighth valve (15), a ninth valve (16) and a tenth valve (17) which are in one-to-one correspondence, the hydrogen cavity (31), the water cavity (32) and the cavity (33) are communicated in pairs respectively.
7. The device for the rapid detection of the airtightness of a fuel cell according to claim 6, wherein the first flow rate testing device (5) and the second flow rate testing device (14) are each a flow meter.
8. A method for rapidly detecting the airtightness of a fuel cell, which is implemented based on the apparatus for rapidly detecting the airtightness of a fuel cell according to any one of claims 4 to 7, and which comprises:
adjusting the pressure reducing valve (13) to a first preset value, opening a seventh valve (12), a first valve (6), a second valve (7) and a third valve (8), and controlling other valves to be in a closed state so as to simultaneously inflate a hydrogen cavity (31), a water cavity (32) and a cavity (33) in the fuel cell (3);
when the reading of the pressure reducing valve (13) is stabilized at a first preset value, closing the first valve (6) and opening the fourth valve (9);
when the reading of the first flow testing device (5) is stable, recording the reading of the first flow testing device (5) at the moment to obtain the leakage value of the hydrogen cavity (31);
closing the fourth valve (9) and opening the first valve (6);
when the reading of the pressure reducing valve (13) is stabilized at a first preset value, closing the second valve (7) and opening the fifth valve (10);
when the reading of the first flow testing device (5) is stable, recording the reading of the first flow testing device (5) at the moment to obtain the leakage value of the water cavity (32);
closing the fifth valve (10) and opening the second valve (7);
when the reading of the pressure reducing valve (13) is stabilized at a first preset value, closing the third valve (8) and opening the sixth valve (11);
when the reading of the first flow testing device (5) is stable, recording the reading of the first flow testing device (5) at the moment to obtain the leakage value of the cavity (33);
and closing the seventh valve (12), the first valve (6), the second valve (7) and the third valve (8) to finish the single-cavity airtight leakage test.
9. A method for rapidly detecting the airtightness of a fuel cell, which is implemented based on the apparatus for rapidly detecting the airtightness of a fuel cell according to any one of claims 4 to 7, and which comprises:
adjusting the pressure reducing valve (13) to a second preset value, opening a seventh valve (12), a first valve (6), a second valve (7) and a third valve (8), and controlling other valves to be in a closed state so as to simultaneously inflate a hydrogen cavity (31), a water cavity (32) and a cavity (33) in the fuel cell (3);
when the reading of the pressure reducing valve (13) is stabilized at a second preset value, simultaneously opening a fourth valve (9), a fifth valve (10) and a sixth valve (11);
when the reading of the first flow testing device (5) is stable, recording the reading of the first flow testing device (5) at the moment to obtain the total leakage value of the hydrogen cavity (31), the water cavity (32) and the cavity (33);
and closing the seventh valve (12), the first valve (6), the second valve (7) and the third valve (8) to finish the three-cavity airtight external leakage test.
10. A method for rapidly detecting the airtightness of a fuel cell, which is implemented based on the apparatus for rapidly detecting the airtightness of a fuel cell according to claim 6 or 7, and which comprises:
adjusting the pressure reducing valve (13) to a third preset value, opening the seventh valve (12) and the first valve (6), and controlling other valves to be in a closed state so as to charge a hydrogen cavity (31) in the fuel cell (3);
when the indication of the pressure reducing valve (13) is stabilized at a third preset value, opening a ninth valve (16);
when the reading of the second flow testing device (14) is stable, recording the reading of the second flow testing device (14) at the moment to obtain a hydrogen water leakage value, and closing the ninth valve (16);
opening a tenth valve (17);
when the reading of the second flow testing device (14) is stable, recording the reading of the second flow testing device (14) at the moment to obtain a hydrogen empty string leakage value, and closing a tenth valve (17);
opening a second valve (7) to charge a water chamber (32) inside the fuel cell (3);
when the reading of the pressure reducing valve (13) is stabilized at a third preset value, opening an eighth valve (15);
when the reading of the second flow testing device (14) is stable, recording the reading of the second flow testing device (14) at the moment to obtain a water-hydrogen cross leakage value, and closing the eighth valve (15);
opening a tenth valve (17);
when the reading of the second flow testing device (14) is stable, recording the reading of the second flow testing device (14) at the moment to obtain a water empty string leakage value, and closing a tenth valve (17);
opening the second valve (7) to charge the cavity (33) inside the fuel cell (3);
when the reading of the pressure reducing valve (13) is stabilized at a third preset value, opening an eighth valve (15);
when the reading of the second flow testing device (14) is stable, recording the reading of the second flow testing device (14) at the moment to obtain an air-hydrogen serial leakage value, and closing the eighth valve (15);
opening a ninth valve (16);
when the reading of the second flow testing device (14) is stable, recording the reading of the second flow testing device (14) at the moment to obtain an empty water leakage value;
and closing the seventh valve (12) and the ninth valve (16) to complete the airtight series leakage test.
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