KR101287860B1 - Apparatus for testing airtightness of the Flow field plate and the test method therewith - Google Patents

Abstract

The present invention relates to an apparatus for sealing inspection of a fuel cell separator and a method for sealing inspection of a fuel cell separator using the same. To this end, an embodiment of the present invention is a press for pressurizing a fuel cell separator, injection ports formed in the press corresponding to each injection electrode of the fuel cell separator and the electrode surface portion of one surface of the fuel cell separator plate, fuel cell separator plate Outlet flow paths formed in the press with respect to each of the outlet electrode and the electrode surface portion of the other side of the fuel cell separation plate, an injection valve provided in each injection flow path and each exit flow path, injection through the main flow path and the main flow path It characterized in that it comprises a mass flow meter for measuring the flow rate of the inspection gas to be.

Description

Apparatus for testing airtightness of the Flow field plate and the test method therewith}

The present invention relates to an apparatus for sealing inspection of a fuel cell separator and a method for sealing inspection of a fuel cell separator using the same.

A fuel cell is a cell that directly converts chemical energy generated by oxidation of fuel into electrical energy. The reactants are continuously supplied from the outside and the reaction products are continuously discharged to the outside. In one example, fuel, hydrogen, and air are electrochemically reacted between the catalyst and the electrolyte membrane, producing electricity and water, which are carried out in one independent cell unit. In order to generate available power, it is generally composed of a stack of tens to hundreds of cells stacked on a plurality of cells.

In addition, one cell is composed of an anode separator, an electrode catalyst assembly (MEA), and an anode separator, and the stack is manufactured by stacking as many cells as desired in the order of the anode separator, the MEA, the cathode separator, and the cooling separator.

These separators must satisfy various characteristics such as electrical conductivity, strength, gas permeability, electrochemical stability, and hydrophilicity. Among these, gas permeability is important because it is directly related to fuel cell performance. In particular, the smaller the gas permeation rate of the fuel cell separator material itself, the gas permeation rate between the fuel cell separator and the sealing member in the stack, and the gas permeation rate between the fuel electrode, the air electrode and the cooling electrode of the fuel cell separator, the better the performance. Will be exercised.

The gas permeation measurement of the conventional fuel cell polarizing plate material has been made in a dedicated evaluation apparatus by producing a specimen in a certain volume. This is not an inspection of the fuel cell separation plate itself, so there is a problem in reliability, and since a separate specimen must be manufactured, there is a disadvantage in that time and additional cost are required.

In addition, similar to the process of assembling the fuel cell stack, a method of sequentially measuring gas permeability while placing a separator between the separator and the separator and puncturing the separator is used. This is a one-time breakage is broken and the cost of the inspection is made, and the gas permeation amount of the breakage should be considered additionally, there is a problem of trouble and reliability of the additional measurement.

The present invention has been made to solve the above-described problems, and has the object of making the sealing performance inspection of the fuel cell separator plate quick.

In accordance with an aspect of the present invention, an injection passage is formed in the press corresponding to a press for pressurizing a fuel cell separation plate, an injection electrode of each of the fuel cell separation plates, and an electrode surface portion of one surface of the fuel cell separation plate. For example, the outlet passages formed in the press corresponding to each outlet electrode of the fuel electric separator and the electrode surface portion of the other surface of the fuel cell separator, an opening and closing valve provided in each injection passage and each outlet passage, and the injection passage The present invention provides a sealing performance inspection apparatus for a fuel electric separation plate including a main flow passage through which the main flow passages and a mass flow meter for measuring the flow rate of the inspection gas injected through the main passage.

In this case, the main flow passage may bypass the mass flow meter so that the inspection gas flows into the injection flow passages, and a bypass line having an opening / closing valve may be further provided.

In addition, a sealing member is further coupled to the upper and lower surfaces of the fuel electric separation plate, wherein the sealing member has holes corresponding to the injection electrode and the exit electrode, and is separated from the holes to correspond to the electrode surface portion of the fuel electric separation plate. Electrode surface holes may be formed.

In the method for hermetically inspecting a fuel cell separator using the hermetic inspection device of the fuel cell separator, an injection passage communicating with an electrode surface of one surface of the fuel cell separator and an electrode on the other side of the fuel cell separator Opening the outlet passage communicating with the face, closing the other injection passages and the outlet passages, injecting a test gas into the bypass line to apply a gas pressure to the pressurized injection passage, and the outlet passage and the bypass passage. Closing the on-off valve of the line, injecting a test gas through the mass flow meter, and measuring a gas flow rate.

Meanwhile, in the method for hermetically inspecting the fuel cell separator using the above-described hermetic inspection device of the fuel cell separator, (A) only one of the injection passages connected to the injection electrodes is opened and connected to the outlet electrode. (B) injecting the test gas into the bypass line and checking the discharge of the test gas between the open and open outlet flow paths; C) closing the bypass line and the open injection passage, injecting a test gas through a mass flow meter, and measuring a gas flow rate; (D) if the gas flow amount is less than a set reference gas flow rate, Injecting the test gas through the mass flow meter while opening, measuring the gas flow through the mass flow meter, and (E) returning to step (A). It may include passing the steps (B) to (D) while sequentially opening the injection passage.

In addition, after the step (E), (F) opening the injection passages connected to the injection electrodes, closing the exit passages connected to the outlet electrodes, injecting a test gas into the bypass line, and (G) bypassing Close the line, inject the test gas through the mass flow meter and measure the gas flow through the mass flow meter.

According to the embodiment of the present invention, since the sealing performance inspection of the fuel cell separation plate is made in consideration of the number of cases by the sequential opening and closing operation of the valve, there is an advantage that a consumable member is not required as in the prior art.

In addition, since the injection time of the inspection gas required for the inspection can be reduced through the bypass line, the time required for the entire inspection is greatly reduced.

In addition, one cathode-cooling cathode separator and one anode-cooling separator may be independently inspected for sealing performance, and a sealing member may be inspected by laminating sealing cells. In addition, the sealing performance can be inspected with respect to the one cell which bonded these, or the sealing performance with respect to the stack | stacked which the several cell was laminated | stacked, and is large in versatility.

In addition, according to the hermetic inspection method of the fuel cell separator according to an embodiment of the present invention, it is also applicable to an automated facility, thereby further increasing the convenience and speed of inspection.

1 is a perspective view schematically showing an airtight inspection apparatus of a fuel cell separator in accordance with an embodiment of the present invention.
Figure 2 is a schematic view showing the components applied to the method for sealing inspection of the fuel cell separator in accordance with an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described the configuration, function and operation of the sealing test device of the fuel cell separator and the sealed test method using the same according to an embodiment of the present invention.

Hereinafter, the injection electrodes on the left side of the fuel cell separator 10 are the air injection electrodes 12c, the coolant injection electrodes 12b, and the fuel injection electrodes 12a sequentially from the front to the back, based on FIG. These are the fuel outlet electrode 12f, the coolant outlet electrode 12e, and the air outlet electrode 12d sequentially from front to back. In addition, a unit consisting of an air cathode-cooling electrode separator and a fuel electrode-cooling electrode separator is referred to as a cell, and hereinafter, a fuel cell separator means the cell unless otherwise described.

Referring to FIG. 1, the sealing inspection apparatus 100 of a fuel cell separator according to an embodiment of the present invention includes a press 1 for pressurizing a fuel cell separator, an injection electrode of the fuel cell separator 10, and Injection passages 13a to 13c and 13g formed in the press 1 corresponding to the electrode surface portion 12g on one surface of the fuel cell separator 10 and each outlet electrode of the fuel cell separator 10. And outlet flow paths 13d to 13f and 13h formed in the press corresponding to the electrode surface portion 12h of the other surface of the fuel cell separator 10, and opening / closing valves 11a provided in each injection flow path and each outlet flow path. To 11h), and a mass flow meter 3 for measuring the flow rate of the test gas injected through the main flow path and the main flow path 4 through which the injection flow paths communicate.

Furthermore, the main flow passage 4 may further include a bypass line 5 bypassing the mass flowmeter 3, and the bypass line 5 may further include an on-off valve 51.

The press 1 is provided with the plates 11 and 12 for pressurization up and down. The upper and lower plates may pressurize the fuel electric separation plate 10 positioned therebetween at a constant pressure by the press body. In this case, the press pressure may be 1 atm to 3 atm.

In the upper plate 11 or the lower plate 12, the injection passages 13a to 13c and 13g corresponding to the injection electrodes and the outlet electrodes provided in the fuel cell separator 10, respectively, and the outlet passages 13d to. 13f, 13h) are formed. In addition, the electrode surface outlets on the upper plate 11 correspond to the electrode surface portions 12g and 12h defined between the injection electrodes 12a to 12c and the outlet electrodes 12d to 12f of the fuel electric separator 10. A flow passage 13g is formed, and an injection passage 13h is formed in the lower plate 12.

The relationship between each injection electrode, each injection passage, and each outlet electrode and outlet passage is shown in Table 1 below.

Injection electrodes Injection paths Exit poles Exit euros  Fuel injection electrode 12a  Fuel injection passage 13a  Fuel outlet electrode 12f  Fuel outlet flow path (13f)  Cooling water injection pole 12b Cooling water injection passage (13b)  Cooling water outlet 12e Cooling outlet flow path (13e)  Air injection electrode 12c  Air injection path (13c)  Air outlet pole 12d  Air outlet flow path (13d)  12g of electrode surface part of lower surface  Electrode injection flow path (13g)  12h of electrode surfaces on the upper surface  Electrode side outlet flow path (13h)

Referring back to FIG. 1, the upper plate 11 of the press is provided with an air injection passage 13c, a cooling water injection passage 13b, and a fuel injection passage 13a side by side. On the opposite side, a fuel outlet passage 13f, a cooling water outlet passage 13e, and an air outlet passage 13d are formed side by side.

In addition, the upper plate 11 is provided with an electrode surface injection passage 13g at a position corresponding to the electrode surface portion of the upper surface of the fuel cell separation plate, and the lower plate 12 has a lower surface of the fuel cell separation plate. An electrode surface outlet passage 13h is formed at a position corresponding to the electrode surface portion. In this case, the injection passages may be formed in the lower plate according to the position of each injection electrode.

On the other hand, pipes are connected to each injection passage and each outlet passage, and on / off valves 11a to 11h are attached to each pipe. At this time, the opening and closing valve (11a to 11h) may be a solenoid valve, it may be configured to open and close controlled by a control unit not shown.

Hereinafter, for convenience of description, the relationship between the flow paths and the valve is defined as shown in Table 2 below.

Euro Valve on left channel Euro Valve on left channel  Fuel injection passage 13a  First valve 11a  Air outlet flow path (13d)  4th valve (11d) Cooling water injection passage (13b)  Second valve 11b Cooling outlet flow path (13e)  Fifth valve 11e  Air injection path (13c)  Third valve 11c  Fuel outlet flow path (13f)  6th valve (11f)  Electrode injection flow path (13g)  7th valve (11g)  Electrode side outlet flow path (13h)  8th valve (11h)

On the other hand, the main flow path 4 is a flow path through which all the injection flow paths 13a to 13c and 13g communicate. One end of the main flow passage 4 is connected to a mass flow meter (MFM) 3. The mass flow meter 3 may be configured to replace a different sensitivity depending on the object to be measured. When measuring a fuel cell separator consisting of 1 cell, one that can measure a flow rate of 1CCM or less can be used, and when measuring a stack consisting of a plurality of cells of 50 cells or more can be used that can measure a flow rate of 20CCM or more. have. In addition, the mass flow meter can be replaced with another flow meter capable of finely measuring the flow rate of the test gas.

The test gas injected into the mass flow meter (3) is supplied from a gas storage tank (not shown). Whether the test gas is supplied may be determined by the controller.

On the other hand, the bypass line (5) allows the inspection gas to flow into the injection flow path bypassing the mass flow meter (3). Since the injection amount of the test gas by the bypass line 5 is larger than the maximum flow rate that can pass through the mass flowmeter, the initial injection of the test gas is performed quickly.

On the other hand, a sealing member 2 is further coupled to the upper and lower surfaces of the fuel cell separating plate 10, and the sealing member 2 has holes 21 corresponding to the injection electrode and the outlet electrode, and the holes 21 and the holes 21. Independently, an electrode face hole 22 corresponding to the electrode face portion of the fuel electric separator is formed.

The sealing member 2 has a function of airtight so that inspection gases injected from the injection passages do not move to another path. The sealing member is formed to correspond to the injection passages and the discharge passages.

In FIG. 1, the fuel cell separator shows a cell in which a cathode-cooling separator and a fuel-cooling separator are joined. Alternatively, in evaluating one cell, the sealing member may be interposed between the cathode-cooling separator and the anode-cooling separator.

Hereinafter, with reference to FIG. 2, a method of hermetically inspecting a fuel cell separator using the above-described hermetic sealing apparatus of the fuel cell separator will be described.

First, a method of performing a hermetic inspection that penetrates the inside of the fuel cell separator 10 or leaks to the outside will be described. Here, gas permeation inside the fuel cell separator means that gas is permeated in the thickness direction of the fuel cell separator, and gas leakage to the outside means to escape between the fuel cell separator and the sealing member.

The gas permeation and the gas leakage test to the inside of the fuel cell separation plate is a method of measuring the flow rate of the test gas continuously injected while injecting the test gas into the electrode surface portion 12g of the fuel cell separator 10. Is done.

Specifically, the injection flow passage 13g communicating with the electrode surface portion 12g on one surface of the fuel cell separation plate 10 and the exit flow passage communicating with the electrode surface portion 12h on the other surface of the fuel cell separation plate 10 ( 13h) opening, closing the remaining injection passages and the exit passages, injecting a test gas into the bypass line 5 to apply gas pressure to the opened injection passages, and bypassing the exit passages and the bypass passages. Closing the on / off valve of the line (5), injecting the test gas through the mass flow meter (3) and measuring the gas flow amount.

Specifically, the first valve 11a to the sixth valve 11f are closed, and the seventh valve 11g and the eighth valve 11h are opened, so that the electrodes on the upper and lower surfaces of the electrode surface portion of the fuel cell separator 10 are closed. The surface injection passage 13g and the electrode surface outlet passage 13h are opened.

Thereafter, the test gas is injected into the bypass line 5 so that a constant pressure is rapidly formed on the electrode surface injection passage 13g and the lower surface 12g of the fuel cell separator. In this case, the pressure of the test gas applied to the bottom surface of the injection passage and the fuel cell separator may be equal to the actual operating pressure of the fuel cell separator or may be a weighted pressure added to a safety value.

Thereafter, the eighth valve 11h is closed to close the electrode surface outlet passage 13h, and the opening / closing valve of the bypass line 5 is closed to allow the inspection gas to be injected into the mass flow meter 3 only. Next, the gas flow amount of the test gas injected through the mass flow meter (3) is measured.

The gas flow rate measured through the mass flow meter 3 is equal to the sum of the gas flow rate penetrating the interior of the fuel cell separator plate and the gas flow amount leaking between the fuel cell separator plate and the gascat. Therefore, it is possible to determine whether the fuel cell separator is defective by comparing the gas flow rate measured through the mass flow meter with the reference gas flow rate already set.

Meanwhile, the sealing performance of the outlet electrodes with respect to the injection electrodes is examined in the following manner. In the method for hermetically inspecting a fuel cell separator using the hermetic inspection device of the fuel cell separator according to the above embodiment, (A) only one of the injection passages connected to the injection electrodes is opened and the outlet electrode is opened. (B) injecting the test gas through the bypass line and confirming the discharge of the test gas between the open and open outlet flow paths; (C) closing the bypass line and the open injection passage, injecting a test gas through a mass flow meter, and measuring a gas flow rate; and (D) if the gas flow amount is less than the set reference gas flow rate, the remaining outlet flow path. Injecting the test gas through the mass flow meter while sequentially opening and measuring the gas flow rate through the mass flow meter and (E) returns to the step (A). While opening the other injection passage includes in turn the number of steps for the step (B) to the (D) step.

For convenience of explanation, the sealing performance of the fuel injection electrode 12a to the air outlet electrode 12d and the cooling water outlet electrode 12e is examined, and then the cooling water injection electrode 12b to the air outlet electrode 12d and the fuel outlet The sealing performance of the pole 12f is inspected, and then, the sealing performance of the air injection electrode 12c, the cooling water outlet electrode 12e, and the fuel outlet electrode 12f is determined to be sequentially examined.

First, a method of sequentially checking the sealing performance of the fuel injection electrode 12a, the air outlet electrode 12d, and the cooling water outlet electrode 12e will be described.

In step (A), the first valve 11a is opened to open the fuel injection passage 13a in communication with the fuel injection electrode 12a. Further, the sixth valve 11f is opened to open the fuel outlet electrode 12f and the fuel outlet passage 13f communicating with the fuel injection passage 13a. At this time, the second valve 11b to the fifth valve 11e, and the seventh valve 11g and the eighth valve 11h are closed.

Injecting the test gas into the bypass line 5 in step (B), checks whether the test gas is discharged to the fuel outlet electrode 12f. This can be confirmed by measuring the gas flow amount of the mass flow meter 3 connected in parallel with the bypass line 5. If the test gas is not injected by the mass flow meter, the path between the fuel injection electrode and the fuel outlet electrode may be blocked, and the defect may be recognized.

In step (C), the opening / closing valve of the bypass line 5 is closed, and the sixth valve 11f is closed to close the fuel outlet passage 12f. At the same time, the gas flow rate of the test gas is measured through the mass flow meter (3). At this time, the measured gas flow amount is the sum of the gas flow rate penetrating the inside of the fuel cell separator plate through the fuel injection electrode and the amount of gas leakage leaking outside between the fuel cell separator plate and the sealing member. Therefore, it is possible to determine whether the fuel cell separator is defective by comparing the gas flow rate measured by the mass flow meter with the reference gas flow amount already set. If the measured gas flow amount is equal to or greater than the reference gas flow amount, the fuel cell separation plate is determined to be defective and terminated. If not, the flow proceeds to the next step.

At this time, the bypass line is to minimize the sealing performance test time of the fuel cell separation plate while moving from step (B) to step (C), and the time required for filling the inside of the injection passage with the test gas, Use only mass flowmeters to drastically reduce them when filling.

Step (D) is to sequentially check the sealing performance of the air outlet electrode 12d and the cooling water outlet electrode 12e when the measured gas flow amount is less than the set reference gas flow amount.

First, the air outlet passage 13d communicating with the air outlet electrode 12d is opened by opening the fourth valve 11d by inspecting the sealing performance of the fuel injection electrode 12a to the air outlet electrode 12d. do. In addition, the gas flow rate is measured through the mass flow meter (3). If the measured gas flow amount is newly increased and exceeds the standard gas flow amount, the amount of gas flow permeated through the air outlet electrode is increased, so it is determined to be defective and ends.

If the measured gas flow amount is less than the reference gas flow amount, it is determined that the defect is not bad, and the fifth valve 11e is opened to check the sealing performance of the fuel injection electrode 12a and the cooling water outlet electrode 12e. As described above, it may be determined by comparing the gas flow rate and the reference gas flow amount passing through the mass flow meter as to whether the inspection gas is permeated by the open cooling water outlet electrode 12e and the cooling water outlet passage 13e. If the measured gas flow exceeds the standard gas flow, it is determined to be defective and terminated. If it is below, the next step is entered.

In the step (E), after the sealing performance test for the fuel injection electrode 12a is completed, the process returns to step (A) again to check the sealing performance for the cooling water injection electrode 12b.

In step (A), the first valve 11a and the third valve 11c are closed, and the second valve 11b is opened to close the fuel injection passage 13a and the air injection passage 13c, and the cooling water injection passage. Open 13b. Further, the fifth valve 11e is opened, and the fourth valve 11d and the sixth valves 11f to 8th valve 11h are closed to open the cooling water outlet electrode 12e and the cooling water outlet passage 13e. .

Thereafter, the inspection gas is injected into the bypass line 5 in step (B), and it is determined whether the inspection gas is smoothly discharged to the cooling water outlet electrode 12e through the cooling water injection electrode 12b. The detailed determination method is the same as that mentioned above.

Thereafter, in step (C), the opening / closing valve and the fifth valve 11e of the bypass line 5 are closed to close the cooling water outlet electrode 12e and the cooling water outlet passage 13e, and the mass flow meter 3 is measured to provide fuel. Inspect the degree of leakage into or out of the battery separator.

Thereafter, in step (D), the fourth valve 11d and the sixth valve 11f are sequentially opened, while the cooling water injection electrode 12b to the air outlet electrode 12d are sealed and the cooling water injection electrode 12b to the fuel outlet. Check the sealing performance of the pole (12f).

Thereafter, in step (E), the sealing performance of the fuel outlet electrode and the cooling water outlet electrode with respect to the air injection electrode is examined. That is, returning to step (A), the first valve 11a and the second valve 11b are closed to close the fuel injection passage 13a and the cooling water injection passage 13b, and the third valve is opened to open the air injection passage. Open 13c. In addition, the fourth valve 11d is opened to open the air outlet electrode 12d and the air outlet passage 13d, and the fifth valve 11e to the eighth valve 11h are closed to close the remaining outlet passage.

In step (B), the test gas is injected into the bypass line 5, and the test gas is inspected to smoothly discharge the test gas between the air injection electrode 12c and the air outlet electrode 12d.

Subsequently, in step (C), the on / off valve of the bypass line 5 and the fourth valve of the air outlet flow path are closed, the test gas is injected through the mass flow meter 3, and the gas flow rate is measured. Check for penetration.

Subsequently, in step (D), the fifth valve 11e and the sixth valve 11f are sequentially opened, and the air injection electrode 12c vs. the coolant outlet electrode 12e is sealed and the air injection electrode 12c is fuel. Inspect the outlet pole sealing performance sequentially.

At this time, in the case of inspecting with a fuel cell separation plate (air separation plate, anode separation plate, cooling water separation plate) consisting of one sheet, steps (D) and (E) may be omitted.

In addition, after completion of the sealing performance inspection of the outlet electrode for each injection electrode, (F) the injection passages connected to the injection electrodes are opened, the outlet passages connected to the outlet electrodes are closed, and the test gas is injected into the bypass line. And (G) closing the bypass line, injecting a test gas through a mass flow meter, and measuring a gas flow rate through the mass flow meter.

Specifically, in the step (F), the first valve 11a to the sixth valve 11f are opened, the test gas is injected through the bypass line 5 so that a constant pressure is formed in each flow path, and then the fourth The valves 11d to 6th valve 11f are closed. At this time, the inspection gas injected through the bypass line is quickly filled in the injection passage to form the pressure required for the inspection.

Step (G) closes the on / off valve of the bypass line 5 and measures the amount of gas flow injected through the mass flow meter. The measured gas flow rate is determined as the gas flow rate through which the gas injected through the injection electrodes leaks between the fuel cell separator and the gascat. Therefore, it is possible to determine whether the fuel cell separator is defective by judging the measured gas flow amount and the preset reference gas flow amount.

In the present invention, the control unit may be programmed to determine whether to proceed to the next step by judging the gas flow amount measured in the mass flow rate with the reference gas flow amount. In addition, the operation of the on-off valves and the operation of the press is made by the control unit in sequence, so that the sealing performance inspection of the fuel cell separator may be automated.

In the present invention, the object to be tested for sealing performance may be a cell, a fuel cell separator, or a stack in which a plurality of cells are stacked. When inspecting the stack, the reference gas flow amount may be drained by the number of stacks of reference gas flow amount required for the sealing performance inspection for one cell. In addition, the required pressure of the test gas injected according to the number of stacked layers may be increased.

100: inspection device
DESCRIPTION OF SYMBOLS 1 Upper part of press 11 Lower plate 12 Plate
2 sealing member 21 holes 22 electrode surface hole
3: mass flow meter
4: Main Euro
5: bypass line 51: on-off valve
10: Split plate
11a to 11h: first to eighth valves
12a: fuel injection electrode 12b: cooling water injection electrode 12c: air injection electrode
12d: air outlet electrode 12c: cooling water outlet electrode 12d: fuel outlet electrode
13a: fuel injection passage 13b: cooling water injection passage 13c: air injection passage
13d: Air outlet passage 13e: Coolant outlet passage 13f: Fuel outlet passage
12g, 12h: Electrode surface part 13g: Electrode surface injection path 13h: Electrode surface discharge path

Claims (6)

Press to press fuel electric separator,
Injection flow paths formed in the press in correspondence with the respective injection electrodes of the fuel electric separation plate and the electrode surface portion of one surface of the fuel cell separation plate;
Outlet flow paths formed in the press in correspondence with each outlet electrode of the fuel electric separation plate and the electrode surface portion of the other surface of the fuel cell separation plate;
On / off valves provided in each injection passage and each outlet passage,
A main flow path through which the injection flow paths communicate, and
An airtight inspection apparatus of a fuel cell separation plate including a mass flow meter for measuring a flow rate of an inspection gas injected through the main passage. In claim 1,
In the main euro
Bypassing the mass flow meter to the test gas flows into the injection flow path, and the closed inspection device of the fuel cell separation plate is connected to the bypass line is provided with an on-off valve. In claim 1,
Sealing members are further coupled to the upper and lower surfaces of the fuel electric separator,
The sealing member
Holes corresponding to the injection electrode and the outlet electrode,
And an electrode surface hole corresponding to the electrode surface portion of the fuel electric separation plate is formed independently of the holes. In the method for hermetically inspecting a fuel cell separator using the hermetic inspection device of the fuel cell separator according to claim 2,
Opening an injection passage communicating with an electrode face of one side of the fuel cell separator, an outlet passage communicating with an electrode face of the other side of the fuel cell separator, and closing the other injection passages and the remaining outlet passages;
Injecting a test gas into the bypass line and applying a gas pressure to an injection passage; and
Closing the opening and closing valves of the outlet passage and the bypass passage, and measuring a gas flow rate of the test gas injected through the mass flow meter. In the method for hermetically inspecting a fuel cell separator using the hermetic inspection device of the fuel cell separator according to claim 2,
(A) opening the injection passage of any one of the injection passages connected to the injection poles, and opening only the outlet passage communicating with the open injection passage among the outlet passages connected to the outlet pole,
(B) injecting the test gas into the bypass line and confirming the discharge of the test gas between the open injection passage and the open outlet passage,
(C) closing the bypass line and the opened injection passage, and measuring the gas flow amount of the test gas injected through the mass flow meter,
(D) measuring the gas flow amount of the test gas injected through the mass flow meter while sequentially opening the remaining outlet flow paths when the gas flow amount is less than the set reference gas flow amount, and
(E) returning to step (A) and passing the steps (B) to (D) while sequentially opening the remaining injection flow paths;
Closed inspection method of the fuel cell separator comprising a. The method of claim 5,
After step (E)
(F) opening the injection passages connected to the injection electrodes, closing the exit passages connected to the outlet electrodes, injecting the test gas into the bypass line, and
(G) closing the bypass line, injecting test gas through the mass flow meter, and measuring gas flow through the mass flow meter;
Sealing method of the fuel cell separator further passing through.

Images