CN103900773A - Online gas tightness detection device and method for fuel cell stack - Google Patents
Online gas tightness detection device and method for fuel cell stack Download PDFInfo
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- CN103900773A CN103900773A CN201410099289.7A CN201410099289A CN103900773A CN 103900773 A CN103900773 A CN 103900773A CN 201410099289 A CN201410099289 A CN 201410099289A CN 103900773 A CN103900773 A CN 103900773A
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Abstract
The invention discloses an online gas tightness detection device and method for a fuel cell stack. The online gas tightness detection device for the fuel cell stack comprises a pressure gauge, a gas tightness portable test box and a gas leakage speed test meter, wherein a pipe is arranged in the gas tightness portable test box, a required control valve is arranged on the pipe, and the pipe and the control valve can be matched to perform gas tightness detection on the fuel cell stack by testing gas. The online gas tightness detection device for the fuel cell stack is reasonable in structure and easy to operate. By means of the online gas tightness detection method for the fuel cell stack, work efficiency and economic benefit can be increased effectively, gas tightness detection operation is simplified greatly, and efficient and reasonable detection on the fuel cell stack can be achieved.
Description
Technical field
The present invention relates to fuel cell stack testing device, relate in particular to the online air-tightness detection device of a kind of fuel cell pack.
Background technology
At present, Proton Exchange Membrane Fuel Cells (PEMFC) is a kind of Blast Furnace Top Gas Recovery Turbine Unit (TRT) of directly utilizing Hydrogen Energy, and PEMFC is converted into electric energy the chemical energy being stored in hydrogen fuel and oxygenant, and energy conversion efficiency is high; Fuel cell environment close friend, unique emission is water.Therefore, fuel cell technology is considered to the cleaning of 21 century first-selection, efficient generation technology.
A typical pem fuel cell stack generally includes: water conservancy diversion import and the flow-guiding channel of (1) fuel and oxidant gas, be distributed to fuel (hydrogen-rich gas obtaining after reforming as hydrogen, methyl alcohol or methyl alcohol, rock gas, gasoline) and oxygenant (being mainly oxygen or air) in the diversion trench of each anode, cathode plane equably; (2) import and export and the flow-guiding channel of cooling fluid (as water), is evenly distributed to cooling fluid in each electric battery inner cooling channel, and the thermal absorption that hydrogen in fuel cell, the themopositive reaction of oxygen galvanochemistry are generated is also taken electric battery out of and dispelled the heat; (3) outlet of fuel and oxidant gas and corresponding flow-guiding channel, fuel gas and oxidant gas are in the time discharging, and portability goes out the liquid generating in fuel cell, the water of steam state.Conventionally, the import and export of all fuel, oxygenant, cooling fluid are all opened on an end plate of fuel cell unit or on two end plates.
Proton Exchange Membrane Fuel Cells can be used as the power system of the delivery vehicles such as all cars, ship, can be used as again portable, portable, fixed Blast Furnace Top Gas Recovery Turbine Unit (TRT).Can be distributed on surface, whole membrane electrode both sides and don't produce in order to ensure the fuel in Proton Exchange Membrane Fuel Cells and oxygenant and mix, Sealing Technology is just very crucial.If seal badly, may produce two kinds of situations: a kind of situation is that fuel gas mixes at fuel battery inside with oxidant gas.In the fuel cell that adopts hydrogen and oxygen to move, this mixing is very fatal, once explosion caused, destructive power is very large; Another situation be fuel gas or oxidant gas to the outside seepage of fuel cell, this situation not only can reduce the efficiency of fuel cell, and once acquire a certain degree when the boundary's concentration accumulation outside of fuel hydrogen, will blast.Therefore, attach great importance to fuel cell seal technology.Sealing can provide the security & performance of operation of fuel cell system to ensure, existing Sealing Technology is mainly by membrane electrode being done to neat cutting in fuel cell assembling process, and do encapsulated sealing with elastic body as elastomeric material in the surrounding of membrane electrode, and apply certain assembling force compression with corresponding fair water fin (having seal groove above), then carry out battery system all-round property testing after battery pile is fastening together with both sides end plate with screw rod.
In battery system all-round property testing process, (connect fuel, oxygenant, cooling fluid) simultaneously, encapsulant may be due to quality reason own, or installation reason, again or other factors cause battery pile impermeability decline, first throwing removes fuel gas and mixes this possible (once explosion caused at fuel battery inside with oxidant gas, destructive power is very large), single from the viewpoint of fuel gas or oxidant gas to the outside seepage analysis of fuel cell, this situation can reduce work efficiency greatly, also can cause very large economic loss simultaneously.Reason is as follows:
1, fuel cell is taken apart and found gas leakage point, this work is very time-consuming, directly reduces work efficiency;
2, original seal is arranged in bipolar plates, although there is tackifier on seal seal groove surface original and above bipolar plates, but because seal tightens together with the end face of some sealing area of membrane electrode for a long time, oneself is through producing larger adhesion, when taking battery pile apart while allowing bipolar plates separate with membrane electrode, often seal is got off by tearing, and deform, not only cause ressembling, and cannot reuse after seal distortion, cause economic loss (the seal cost after moulding is very high);
3, traditional impermeability detects and just utilizes some pipelines according to different test events, constantly on fuel cell pack, plugs, and not only these pipelines are disorderly and unsystematic, and operating process is loaded down with trivial details, directly reduce work efficiency.
Summary of the invention
According to the technical matters of above-mentioned proposition, and provide a kind of fuel cell pack online air-tightness detection device, this device can effectively reduce costs and increase work efficiency.The technological means that the present invention adopts is as follows:
The online air-tightness detection device of a kind of fuel cell pack, comprise tensimeter and gas leakage rate tester, it is characterized in that: also comprise the convenient test box of impermeability, the convenient test box of described impermeability one end is provided with air source inlet, air source inlet is connected with gas main, on described gas main, pressure gauge connection is installed, on the pipeline between air source inlet and pressure gauge connection, total air valve is installed, described gas main is divided into pipe I away from one end of air source inlet, three arms of pipe II and pipe III, described pipe I, pipe II and pipe III are respectively interface I away from the termination of gas main, interface II and interface III, in described pipe I, operation valve I is installed, in described pipe II, operation valve II is installed, between described pipe I and pipe II, connecting pipeline is housed, operation valve III and operation valve IV are housed on described connecting pipeline, connecting pipeline is connected with the pipeline between operation valve I and interface I near one end of operation valve III simultaneously, connecting pipeline is connected with the pipeline between operation valve II and interface II near one end of operation valve IV, on pipeline between described operation valve III and operation valve IV, be provided with Leakage Gas velocity test meter interface, in described pipe III, be provided with gas outlet, on described gas outlet, gas bleed valve is installed.
Further, described Leakage Gas velocity test is counted soap film flowmeter, and the measuring accuracy of described soap film flowmeter can reach 0.1mL.
Further, described gauge measurement precision can reach 0.002MPa.
The online air-tightness detection method of a kind of fuel cell pack, use the online air-tightness detection device of fuel cell pack of the present invention, also use source of the gas, reduction valve and press, tested object is that test process comprises the following steps by exert pressure assembling pressure but not yet screw the battery pile of nut of press:
A. in the situation that meeting coolant cavity interface and not being connected with interface III, fuel agent chamber interface, coolant cavity interface and the oxidant cavity interface of mesuring battary heap are connected with random order with interface I, interface II and interface III respectively, air source inlet is connected with source of the gas;
C. test battery heap leaks outside: open total air valve, operation valve I and operation valve II, close gas bleed valve, operation valve III and operation valve IV, open source of the gas and regulate reduction valve to tensimeter to be shown as desirable value, keep closing total air valve and source of the gas after this value stabilization, and observe pressure gauge reading and whether change at the appointed time;
D. test battery fuel agent chamber, oxidant cavity and coolant cavity are altered mutually: open in the emptying fuel cell of blowdown valve and close blowdown valve after gas, Leakage Gas velocity test meter is connected with Leakage Gas velocity test meter interface, if coolant cavity interface is connected with interface II, closed control valve II, open operation valve IV and total air valve, if coolant cavity interface is connected with interface I, closed control valve I, open operation valve III and total air valve, open source of the gas and regulate reduction valve to tensimeter to be shown as desirable value, observe the variation at the appointed time of Leakage Gas velocity test meter, after carrying out respective record, close source of the gas,
E. test battery fuel cavity, oxidant cavity is altered mutually: open in the emptying fuel cell of blowdown valve and close blowdown valve after gas, if coolant cavity interface is connected with interface II, closed control valve I and operation valve IV, open operation valve III and total air valve, if coolant cavity interface is connected with interface I, closed control valve II and operation valve III, open operation valve IV and total air valve, open source of the gas and regulate reduction valve to tensimeter to be shown as desirable value, observe the variation at the appointed time of Leakage Gas velocity test meter, after carrying out respective record, close source of the gas, open the gas in the emptying fuel cell of blowdown valve.
Further, described source of the gas is nitrogen cylinder.
Further, described press is digital display universal testing machine, and the pressure precision of described digital display universal testing machine can reach 0.1N.
If coolant cavity interface is connected with interface III, be connected with interface I with oxidant cavity interface and fuel agent chamber interface and interface II are connected to example, carrying out battery fuel agent chamber, when oxidant cavity and coolant cavity are altered test mutually, test gas should enter respectively oxidant cavity and fuel agent chamber from interface I and interface II, if have gas to alter mutually between fuel agent chamber and oxidant cavity and coolant cavity, test gas gas should enter fuel agent chamber and oxidant cavity from pipe I and pipe II, then enter coolant cavity and then enter pipe III by interface III, and in fact, test gas has also entered pipe III in entering pipe I and pipe II, so test failure, carrying out battery fuel agent chamber, oxidant cavity while altering mutually test, test gas should enter oxidant cavity through pipe I and interface I, if have mutually and alter between oxidant cavity and fuel agent chamber, test gas enters fuel agent chamber from oxidant cavity and arrives Leakage Gas velocity test meter by interface II, pipe II and operation valve IV again, the coolant cavity being now connected with interface III should not enter gas, and in fact, test gas has also entered pipe III in entering pipe I and pipe II, so a test failure.
Therefore, coolant cavity interface can not be connected with interface III.
After test passes, battery pile is separated with proving installation, use dial torque wrench that nut is screwed until the pressure of press is zero can stop.
The present invention has the following advantages:
1, in assembling process, can monitor fuel cell and whether occur Leakage Gas, if find, can check in time leak source and revise, so avoid occurring leaking tearing open the time that heap leakage detection consumes of carrying out in battery pile normal course of operation, greatly improved work efficiency;
2, the present invention adopts battery pile impermeability convenient means and method, effectively reduce because of gas leakage and tear open and pile the loss that causes a large amount of seals, indirectly improved economic benefit;
3, greatly simplified impermeability detect operation, and then increase work efficiency and proving installation elegant in appearance.
Brief description of the drawings
Fig. 1 is that the online air-tightness detection device of a kind of fuel cell pack of the present invention uses view.
Fig. 2 is the online air-tightness detection device structural representation of a kind of fuel cell pack of the present invention.
Fig. 3 is the online air-tightness detection device internal duct of a kind of fuel cell pack of the present invention structural representation.
Embodiment
Below in conjunction with embodiment, the present invention is further described:
As shown in Figure 1 to Figure 3, the present embodiment discloses the online air-tightness detection device of a kind of fuel cell pack, comprise tensimeter and gas leakage rate tester, it is characterized in that: also comprise the convenient test box 23 of impermeability, the convenient test box of described impermeability 23 one end are provided with air source inlet 15, described air source inlet 15 is the port of gas main 16, on described gas main 16, be provided with pressure gauge connection 20, on the pipeline between air source inlet 15 and pressure gauge connection 20, total air valve 4 is installed, described gas main 16 is divided into pipe I 1 away from one end of air source inlet, 3 three arms of pipe II 2 and pipe III, pipe I 1, pipe II 2 and pipe III 3 are respectively interface I 12 away from the termination of gas main, interface II 13 and interface III 14, in described pipe I 1, operation valve I 8 is installed, in described pipe II 2, operation valve II 7 is installed, between described pipe I 1 and pipe II 2, connecting pipeline 17 is housed, operation valve III 11 and operation valve IV 9 are housed on described connecting pipeline, connecting pipeline 17 is connected with the pipeline between operation valve I 8 and interface I 12 near one end of operation valve III 11 simultaneously, connecting pipeline 17 is connected with the pipeline between operation valve II 7 and interface II 13 near one end of operation valve IV 9, on pipeline between described operation valve III 11 and operation valve IV 9, be provided with Leakage Gas velocity test meter interface 10, in order to installing gas leakage rate tester 5, in described pipe III 14, be provided with gas outlet 18, gas bleed valve 6 is installed on described gas outlet.
Further, described Leakage Gas velocity test meter 5 is soap film flowmeter, and the measuring accuracy of described soap film flowmeter can reach 0.1mL.
Further, described tensimeter 19 measuring accuracy can reach 0.002MPa.
The present embodiment also provides a kind of fuel cell pack online air-tightness detection method, adopt the online air-tightness detection device of the disclosed fuel cell pack of the present embodiment, also use press and source of the gas and reduction valve, tested object is by exert pressure assembling pressure but not yet screw the battery pile of nut of press, described press adopts digital display universal testing machine, the pressure precision of described digital display universal testing machine can reach 0.1N, use the online air-tightness detection device of fuel cell pack of the present invention, described source of the gas is that pressure is the nitrogen cylinder 21 of 10MPa, reduction valve 22 is installed on the outlet of described nitrogen cylinder, testing process comprises the following steps:
A. in the situation that meeting coolant cavity interface 26 and not being connected with interface III 14, by the fuel agent chamber interface 25 of mesuring battary heap 24, coolant cavity interface 26 and oxidant cavity interface 27 respectively with interface I 12, interface II 13 is connected with random order with interface III 14, air source inlet 15 is connected with the outlet of nitrogen cylinder 21, because tested object is for adopting press that pressure fuel battery pile is provided, instead of the fuel cell pack assembling is tested, effectively reduce because of gas leakage and tear open and pile the loss that causes a large amount of seals, indirectly improve economic benefit, and in assembling process, can monitor fuel cell and whether occur Leakage Gas, if find, can check in time leak source and revise, so having avoided occurring leaking tearing open of carrying out in battery pile normal course of operation piles the time that leakage detection consumes, greatly improve work efficiency,
B. test battery heap leaks outside: open total air valve 4, operation valve I 8 and operation valve II 7, close gas bleed valve 6, operation valve III 11 and operation valve IV 9, open high-pressure nitrogen bottle 21 and regulate reduction valve 22 to high-precision pressure gauge 19 to be shown as 0.1MPa, keep closing total air valve 4 and nitrogen cylinder 21 after this value stabilization, and observe tensimeter 19 readings and whether change in 10min, if reading reduces, the problem that battery pile leaks outside is described;
C. test battery fuel agent chamber, oxidant cavity and coolant cavity are altered mutually: open in the emptying fuel cell of blowdown valve 6 and close blowdown valve 6 after gas, Leakage Gas velocity test meter 21 is connected with Leakage Gas velocity test meter interface 10, if coolant cavity interface 26 is connected with interface II 13, closed control valve II 7, open operation valve IV 9 and total air valve 4, if coolant cavity interface 26 is connected with interface I 12, closed control valve I 8, open operation valve III 11 and total air valve 4, open high-pressure nitrogen bottle 21 and regulate reduction valve 22 to tensimeter 19 to be shown as 0.1MPa, observe Leakage Gas velocity test meter 23 variation in 1min at the appointed time, after carrying out respective record, close nitrogen cylinder 21, the present invention can and cooperatively interact by the switch of each operation valve and realize battery fuel agent chamber, the test that oxidant cavity and coolant cavity are altered mutually,
D. test battery fuel cavity, oxidant cavity is altered mutually: open in the emptying fuel cell of blowdown valve 6 and close blowdown valve 6 after gas, if coolant cavity interface 26 is connected with interface II 13, closed control valve I 8 and operation valve IV 9, open operation valve III 11 and total air valve 4, if coolant cavity interface 26 is connected with interface I 12, closed control valve II 7 and operation valve III 11, open operation valve IV 9 and total air valve 4, open high-pressure nitrogen bottle 21 and regulate reduction valve 22 to high-precision pressure gauge 19 to be shown as desirable value 0.05MPa, observe the variation of Leakage Gas velocity test meter 23 in 1min, after carrying out respective record, close nitrogen cylinder 21, open the gas in the emptying fuel cell of blowdown valve 6, the present invention is by the required test event of switch change-over of the each operation valve of conversion, simple to operate, greatly improve work efficiency.
If coolant cavity interface 26 is connected with interface III 14, be connected with interface I 12 with oxidant cavity interface and fuel agent chamber interface and interface II 13 are connected to example, carrying out battery fuel agent chamber, when oxidant cavity and coolant cavity are altered test mutually, test gas should enter respectively oxidant cavity and fuel agent chamber from interface I 12 and interface II 13, if have gas to alter mutually between fuel agent chamber and oxidant cavity and coolant cavity, test gas gas should enter fuel agent chamber and oxidant cavity from pipe I 12 and pipe II 13, then enter coolant cavity and then enter pipe III 3 by interface III 14, and in fact, test gas has also entered pipe III 3 in entering pipe I 12 and pipe II 13, so test failure, carrying out battery fuel agent chamber, oxidant cavity while altering mutually test, test gas should enter oxidant cavity through pipe I 1 and interface I 12, if have mutually and alter between oxidant cavity and fuel agent chamber, test gas enters fuel agent chamber from oxidant cavity and arrives Leakage Gas velocity test meter by interface II 13, pipe II 2 and operation valve IV 9 again, the coolant cavity being now connected with interface III 14 should not enter gas, and in fact, test gas has also entered pipe III 3 in entering pipe I 1 and pipe II 1, so a test failure.Therefore, coolant cavity interface 26 can not be connected with interface III 14.
After test passes, battery pile is separated with proving installation, use dial torque wrench that nut is screwed until the pressure of press is zero can stop.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; any be familiar with those skilled in the art the present invention disclose technical scope in; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (6)
1. the online air-tightness detection device of fuel cell pack, comprise tensimeter and gas leakage rate tester, it is characterized in that: also comprise the convenient test box of impermeability, the convenient test box of described impermeability one end is provided with air source inlet, air source inlet is connected with gas main, on described gas main, pressure gauge connection is installed, on the pipeline between air source inlet and pressure gauge connection, total air valve is installed, described gas main is divided into pipe I away from one end of air source inlet, three arms of pipe II and pipe III, described pipe I, pipe II and pipe III are respectively interface I away from the termination of gas main, interface II and interface III, in described pipe I, operation valve I is installed, in described pipe II, operation valve II is installed, between described pipe I and pipe II, connecting pipeline is housed, operation valve III and operation valve IV are housed on described connecting pipeline, connecting pipeline is connected with the pipeline between operation valve I and interface I near one end of operation valve III simultaneously, connecting pipeline is connected with the pipeline between operation valve II and interface II near one end of operation valve IV, on pipeline between described operation valve III and operation valve IV, be provided with Leakage Gas velocity test meter interface, in described pipe III, be provided with gas outlet, on described gas outlet, gas bleed valve is installed.
2. the online air-tightness detection device of fuel cell pack according to claim 1, is characterized in that: described Leakage Gas velocity test is counted soap film flowmeter, and the measuring accuracy of described soap film flowmeter can reach 0.1mL.
3. the online air-tightness detection device of fuel cell pack according to claim 1, is characterized in that: described gauge measurement precision can reach 0.002MPa.
4. the online air-tightness detection method of fuel cell pack, right to use requires the online air-tightness detection device of fuel cell pack described in any one in 1 to 3, also use source of the gas, reduction valve and press, it is characterized in that: tested object is that test process comprises the following steps by exert pressure assembling pressure but not yet screw the battery pile of nut of press:
A. in the situation that meeting coolant cavity interface and not being connected with interface III, fuel agent chamber interface, coolant cavity interface and the oxidant cavity interface of mesuring battary heap are connected with random order with interface I, interface II and interface III respectively, air source inlet is connected with source of the gas, tensimeter is connected with pressure gauge connection;
C. test battery heap leaks outside: open total air valve, operation valve I and operation valve II, close gas bleed valve, operation valve III and operation valve IV, open source of the gas and regulate reduction valve to tensimeter to be shown as desirable value, keep closing total air valve and source of the gas after this value stabilization, and observe pressure gauge reading and whether change at the appointed time;
D. test battery fuel agent chamber, oxidant cavity and coolant cavity are altered mutually: open in the emptying fuel cell of blowdown valve and close blowdown valve after gas, Leakage Gas velocity test meter is connected with Leakage Gas velocity test meter interface, if coolant cavity interface is connected with interface II, closed control valve II, open operation valve IV and total air valve, if coolant cavity interface is connected with interface I, closed control valve I, open operation valve III and total air valve, open source of the gas and regulate reduction valve to tensimeter to be shown as desirable value, observe the variation at the appointed time of Leakage Gas velocity test meter, after carrying out respective record, close source of the gas,
E. test battery fuel cavity, oxidant cavity is altered mutually: open in the emptying fuel cell of blowdown valve and close blowdown valve after gas, if coolant cavity interface is connected with interface II, closed control valve I and operation valve IV, open operation valve III and total air valve, if coolant cavity interface is connected with interface I, closed control valve II and operation valve III, open operation valve IV and total air valve, open source of the gas and regulate reduction valve to tensimeter to be shown as desirable value, observe the variation at the appointed time of Leakage Gas velocity test meter, after carrying out respective record, close source of the gas, open the gas in the emptying fuel cell of blowdown valve.
5. the online air-tightness detection method of fuel cell pack according to claim 4, is characterized in that: described source of the gas is nitrogen cylinder.
6. the online air-tightness detection method of fuel cell pack according to claim 4, is characterized in that: described press is digital display universal testing machine, and described digital display universal testing machine pressure precision can reach 0.1N.
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| CN104180958A (en) * | 2014-08-27 | 2014-12-03 | 上海韦宁新能源科技发展有限公司 | Device and method for testing fuel cell stack leakage rate |
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