JPH08167423A - Fuel cell generator - Google Patents

Abstract

(57) [Summary] [Purpose] The fuel cell body shall have a function that allows early detection of leakage and permeation of reaction gas between both electrodes. [Structure] A gas discharge manifold of a fuel cell main body 10, for example, a fuel gas discharge manifold 14 is provided with a sampling pipe 2
0 is connected, a constant flow rate of exhausted fuel gas is sucked by a suction pump 43 controlled by a flow meter 34 and a flow rate controller 36, and is guided to a high temperature gas cooler 22 and an electronic cooler 27 to be cooled and obtained. The high temperature side drain water 31 and the low temperature side drain water 32 are measured in the drain water measuring container 39.
The fuel gas drain water flow rate is obtained by measuring the time required to store a predetermined amount with the water meter 42 and is obtained by the current converter 48 connected to the output terminal 15 in the air drain measuring device 44. The presence or absence of increase is checked by comparing with the standard flow rate calculated by taking into account the output current value, and the presence or absence of leakage and permeation of the reaction gas between both electrodes is detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel cell power generator for supplying reaction gas to obtain direct current power by an electrochemical reaction, and more particularly to a fuel cell power generation equipped with means for detecting leakage permeation of the reaction gas between both electrodes. Regarding the device.

[0002]

2. Description of the Related Art In a fuel cell, an electrolyte layer is sandwiched between a fuel electrode and an air electrode, a fuel gas such as hydrogen is sent to the fuel electrode, and air is sent to the air electrode. It is converted into energy and is a reaction opposite to the reaction of hydrogen and oxygen generated by electrolysis of water.

[0003]

Embedded image H ₂ → 2H ⁻ + 2e (1) Further, in the air electrode,

[0004]

Embedded image The reaction of 1/2 O ₂ + 2H ⁻ + 2e → H ₂ O (2) occurs, direct current electric energy is generated, and the produced water is discharged as steam. FIG. 4 is a cross-sectional view of a main part showing a basic configuration of a laminated fuel cell body that has been conventionally used.

In the laminated fuel cell body shown in FIG. 4, a fuel electrode catalyst layer 2 and a fuel electrode base material 3 are provided on one surface of a flat matrix 1 containing an electrolyte and a reservoir plate 4.
On the other surface, an air electrode composed of an air electrode catalyst layer 5 and an air electrode base material 6 is arranged, and further, a single cell formed by arranging a sealing material 8 on both side surfaces is alternately laminated with a separator 7. Is formed. The fuel electrode base material 3 has a plurality of fuel gas flow grooves 3a on the surface opposite to the fuel electrode catalyst layer 2 arranged in contact with the matrix 1, and the air electrode base material 6 also has a plurality of fuel gas flow grooves 3a. Air flow grooves 6a are provided, and by flowing fuel gas and air into these grooves, respectively, electrochemical reactions of formulas (1) and (2) are caused to generate a DC voltage between both electrodes. It will be.

Incidentally, in FIG. 4, the fuel gas flow groove 3 is shown.
Although a and the air flow groove 6a are shown as being formed in the same direction, they are generally arranged so as to be orthogonal to each other. FIG. 5 is a plan view showing a flow of a reaction gas in a conventionally used laminated fuel cell body. In the configuration of FIG. 5, the fuel gas flow groove 3a of the fuel electrode base material 3 (not shown) is formed in the left-right direction in the drawing, and the air electrode base material 6 is also not shown.
The air flow groove 6a is formed vertically. The fuel gas is a fuel gas supply manifold 1 provided at one end (left side in the drawing) of a fuel cell body 10 having a rectangular cross section.
3 and is flowed through the fuel gas flow groove 3a of the fuel electrode base material 3 (not shown), and the opposite end surface (right side in the drawing)
It is discharged from the fuel gas discharge manifold 14 provided in the. On the other hand, the air is supplied to the air supply manifold 11 provided on one of the remaining pair of end faces of the fuel cell body 10 (upper side in the drawing), and flows through the air flow groove 6a of the air electrode base material 6 (not shown). After that, the air is discharged from the air discharge manifold 12 provided on the opposite end surface (lower side in the drawing).
The reaction gas supplied to each electrode is supplied in a larger amount than the reaction equivalents of the formulas (1) and (2) in order to cause a reaction on the entire surface of the electrode. Therefore, unreacted fuel gas is discharged from the fuel gas discharge manifold 14, and unreacted discharge air is discharged from the air discharge manifold 12. The water produced by the reaction is discharged as steam from the air discharge manifold 12 together with the unreacted discharge air. The DC power generated by the electrochemical reaction by flowing the reaction gas is extracted to the outside by connecting a load between the output terminals 15 and 16 connected to each electrode.

[0007]

Even in the fuel cell power generator using the laminated fuel cell main body constructed as described above, the reaction gas leaks and permeates between both electrodes due to the deterioration of the electrode structure as the power generation operation progresses. Occurs, and the power generation characteristics deteriorate. That is, FIG.
In the laminated fuel cell main body configured as described above, mechanical damage to the separator 7 which plays a role of a partition plate for both electrodes between the laminated single cells, deterioration of life of sealing performance of the sealing material 8, and separator 7 Seal 9A between the seal member 8 and
And 9B, or a situation such as a shortage of phosphoric acid in the electrolyte body of the matrix 1 occurs, leakage and permeation of air sent to the air electrode to the fuel electrode side, or fuel gas sent to the fuel electrode This will cause leakage and permeation to the air electrode.

When the air sent to the air electrode leaks and permeates to the fuel electrode side, in addition to the normal reaction of the above equation (1), the above equation (2) that should occur at the air electrode is generated at the fuel electrode. 2) occurs, a part of the generated electric energy is consumed inside the fuel electrode, and the generated voltage of the fuel cell main body decreases. Also,
When the leakage and permeation of the fuel gas sent to the fuel electrode to the air electrode occurs, in addition to the normal reaction of the formula (2), the reaction of the formula (1) that should originally occur at the fuel electrode occurs in the air electrode. Therefore, a part of the generated electric energy is consumed inside the air electrode, and the generated voltage of the fuel cell main body is lowered.

Further, if the reaction gas leaks and permeates between both electrodes, not only the generated voltage of the fuel cell main body lowers as described above, but also a part of the electric energy is consumed in each electrode. As a result, local heating occurs, the structural material is thermally damaged, and the life of the fuel cell main body is rapidly reduced. Further, the generated water generated by the reaction in each electrode facilitates the movement of phosphoric acid in the electrolyte body in a hygroscopic state and facilitates the formation of minute holes to facilitate the leakage and permeation of the reaction gas. Accelerate the deterioration of power generation characteristics and life of the main body. Therefore, if there is a leak and permeation of the reaction gas between both electrodes, damage will be expanded and it will become unusable unless it is detected early and repaired.

The present invention has been made in consideration of the above problems, and an object thereof is to quickly extend the life of a fuel cell if leakage and permeation of a reaction gas between both electrodes of a fuel cell body occur. It is an object of the present invention to provide a fuel cell power generation device having a function capable of detecting the above-mentioned leakage permeation at an early stage so that it can be implemented.

[0011]

In order to achieve the above object, in the present invention, a fuel electrode comprising a fuel electrode substrate having a plurality of fuel gas flow channels and a fuel electrode catalyst layer, and a plurality of air. A unit cell in which a matrix containing an electrolyte body is sandwiched between an air electrode base material having a flow groove and an air electrode composed of an air electrode catalyst layer is laminated alternately with a separator, and a cooling plate is appropriately inserted to form a laminated type. In the fuel cell power generation device that forms the fuel cell main body of (1) and flows the fuel gas into the fuel gas flow groove and the air into the air flow groove to obtain DC power by the electrochemical reaction, In the case where the fuel gas after flowing through the fuel gas discharge pipe and the air after flowing through the air flow groove are discharged independently through the air discharge pipe, Water content in the exhaust to both sides And to attaching a water quantity measuring device for weighing.

Further, the above-mentioned generated water amount measuring device is provided with a suction pump for branching from the discharge pipe to suck gas, a flow meter for measuring the flow rate of the sucked gas, and a flow rate for controlling the suction pump by feeding back the measured flow rate. It shall be composed of a controller, a gas cooler for separating the water content in the sucked gas, a water meter for measuring the amount of separated generated water, and a measuring device therefor.

Furthermore, the two generated water amount measuring devices attached to the fuel gas discharge pipe and the air discharge pipe are input to the two generated water amount measurement outputs, the difference between them is calculated, and the difference is calculated. It shall be connected to an anomaly detector that issues an anomaly signal when the difference from the reference value exceeds the setting range.

[0014]

The reformed gas which is reformed by adding steam in the reformer is used as the fuel gas sent to the fuel electrode of the fuel cell body. Therefore, in a fuel cell power generator in a normal operating state, the gas flowing through the fuel gas flow groove and discharged from the fuel gas discharge pipe is a mixed gas of unreacted fuel gas and a part of reforming steam. Consists of. On the other hand, the gas discharged from the air discharge pipe through the air flow groove is
It is composed of a mixed gas of unreacted air and water vapor generated by the reaction of the above formula (2).

When the fuel cell body is damaged and a part of the air sent to the air electrode leaks and permeates into the fuel electrode,
Since the reaction of the formula (2) occurs inside the fuel electrode to generate product water, steam generated by the reaction product water is added to the gas discharged from the fuel gas discharge pipe, and the amount of steam increases. . In addition, when a situation occurs in which a part of the fuel gas sent to the fuel electrode leaks and permeates into the air electrode, the reaction of the formula (2) occurs inside the air electrode to generate water, and thus the air discharge pipe. Water vapor generated by the reaction is added to the more discharged gas, and the amount of water vapor increases.

Therefore, as described above, fuel cell power generation in which fuel gas is passed through the fuel gas passages of the laminated fuel cell main body and air is passed through the air passage grooves to obtain DC power by an electrochemical reaction In the device, both the fuel gas discharge pipe and the air discharge pipe are provided with a generated water amount measuring device, and if the moisture content of the exhaust gas is to be measured, an increase in the moisture content causes an increase in the air electrode and the fuel electrode. Leakage and permeation of the reaction gas between the two can be detected.

Further, a suction pump for branching the generated water amount measuring device from the discharge pipe to suck the gas, a flow meter for measuring the flow rate of the sucked gas, a flow rate for feeding back the measured flow rate to control the suction pump. If it consists of a controller, a gas cooler that separates the moisture in the sucked gas, a water meter that measures the amount of separated water produced, and a measuring device therefor, the amount of water contained in the exhaust gas will be very small. Since it is possible to measure the change, it is possible to detect this early even if the amount of leakage and permeation of the reaction gas between the electrodes is very small.

Furthermore, the two generated water amount measuring devices attached to the fuel gas discharge pipe and the air discharge pipe are input to the two generated water amount measurement outputs, the difference between them is calculated, and the difference is calculated. If it is connected to an anomaly detector that emits an anomaly signal when the difference from the reference value exceeds the set range, leakage and permeation of air from the air electrode to the fuel electrode and leakage of fuel gas from the fuel electrode to the air electrode Both the transmission and the transmission can be known by the same signal, and the abnormality can be effectively detected.

[0019]

FIG. 1 is a block diagram of an exhaust gas water content measuring system showing an embodiment of a fuel cell power generator according to the present invention, showing a system for continuously measuring the water content provided in a fuel gas exhaust system. It is an example of a configuration diagram. In this embodiment, an air supply manifold 11 and an air discharge manifold 12 for supplying and discharging air to the air electrode, a fuel gas supply manifold 13 and a fuel gas discharge manifold 14 for supplying and discharging fuel gas to the fuel electrode. , And a pair of output terminals 15 and 16 are connected to a fuel gas discharge manifold 14 of the fuel cell main body 10 to which a sampling pipe 20 of a water content measuring system of the fuel gas discharge system is connected. Exhaust fuel gas for measuring the amount of water is collected by suction with a suction pump 43 connected via a cooler 22, an electronic cooler 27, and a sampling gas flow meter 34.

A heater 21 is installed in the sampling tube 20 so that the steam discharged from the fuel gas exhaust manifold 14 together with the high temperature unreacted fuel gas will not be cooled in the sampling tube 20 to generate condensed water inside the tube. Is installed and maintained at 100 ° C or higher. The discharged fuel gas for measuring the amount of water, which is collected through the sampling pipe 20, is guided to the high temperature gas cooler 22 and cooled.
The high temperature gas cooler 22 is a two-stage cooling system, and is first cooled by exchanging heat with the primary cooling pipe 24 that flows through the cooling water supplied from the outside and discharged to the discharge pipe 25, and then cooled to be completely cooled. 20 to 3 by exchanging heat of the dried exhaust gas of 10 ° C. or less with the secondary cooling pipe 23 that returns and flows
Cool to 0 ° C. The generated water condensed by this cooling operation is stored in the high temperature gas cooler 22 as the high temperature side drain water 31, and when the stored liquid amount becomes a predetermined amount or more, the automatic drain valve 26.
The produced water stored by opening is sent to the drain water measuring container 39.

The exhausted fuel gas for measuring the amount of water passes through the high temperature gas cooler 22 and is then sent to the electronic cooler 27 where it is further cooled to 0 to 5 ° C. to condense the water vapor contained therein and almost completely. It will be dry. The condensed generated water is sent to the drain water measuring container 39 as the low temperature side drain water, and is combined with the high temperature side drain water 31 to measure the total amount of water contained in the exhaust fuel gas for measuring the amount of water. Drain water 3
It becomes 3.

The dry exhausted fuel gas that has passed through the electronic cooler 27 is sucked by the suction pump 43 through the sampling gas flow meter 34, and the suction pump 43 is the electric power of the flow rate converter 35 attached to the sampling gas flow meter 34. A signal 37 is sent to the flow rate controller 36, and the suction force is controlled so as to obtain a predetermined flow rate by receiving the control output 38, so that the flow rate of the discharged fuel gas for measuring the water content is kept constant. In particular, in this configuration, the dry gas is passed through the sampling gas flow meter 34 and the suction pump 43, so that the flow rate can be controlled with high accuracy without causing an error in the flow rate measurement due to moisture and a control error accompanying it.

The compressed dry exhaust fuel gas exhausted from the suction pump 43 is returned to the secondary cooling pipe 23 of the high temperature gas cooler 22 as described above, and is exhausted to the moisture measuring exhaust fuel gas. Is used for cooling. High temperature gas cooler 22
The measured drain water 33 stored in the drain water measuring container 39 after being condensed in the electronic cooler 27 and condensed is stored in the water meter 4
The fuel gas drain water flow rate [ml / m] per unit time is obtained by automatically measuring the time required to collect a predetermined amount of water and to measure the output by an electric signal 45
As the fuel gas measuring device 44. The fuel gas drain measuring device 44 detects the end of the predetermined measurement by the electric signal 45, sends a control signal 46 to the drain solenoid valve 40 attached to the drain water measuring container 39, and opens the drain solenoid valve 40. The measurement drain water 33 is discharged to the water discharge pipe 41. Drain water measuring container 39 Drain water 33
When the stored amount of the liquid reaches a predetermined amount and receives the electric signal, a control signal is sent to the drain solenoid valve 40 to close the drain solenoid valve 40, and the fuel gas drain water flow rate per unit time is again set. Start the measurement. By repeating this operation, the measurement is continued at regular intervals.
Further, in the fuel gas drain measuring device 44, the output terminal 15
In response to the output signal 47 of the current converter 48 for detecting the output currents from 16 and 16, the standard fuel gas drain water flow rate at the predetermined exhaust fuel gas flow rate in the normal operating state corresponding to the output current is calculated, and this standard value is calculated. By comparing the measured value of the electric signal 45 with the measured value, it is determined whether or not the amount of water contained in the exhausted fuel gas is appropriate. In the device of the present embodiment, the average value of several times of repeated measurement is compared with a standard value, and an abnormal signal is generated when the increase amount is equal to or more than a predetermined value, so that the occurrence of abnormality is detected. It is configured so that it can be judged more accurately.

Therefore, if the moisture amount measuring system configured as described above is attached to the fuel gas discharge system of the fuel cell power generator to continuously measure the moisture amount, an abnormality in the moisture amount can be accurately detected. Thus, it becomes possible to detect the leakage and permeation of the air supplied to the fuel cell main body from the air electrode to the fuel electrode early and reliably. FIG. 2 is a configuration diagram of an exhaust gas moisture content measuring system showing an embodiment of the fuel cell power generator of the present invention, and illustrates a configuration diagram of a system for continuously measuring the moisture amount provided in the air exhaust system. It is a thing.

The moisture content measuring system of the exhaust gas shown in this figure is basically the same as the moisture content measuring system of FIG. 1 described above. The difference from FIG. Is a system for measuring the amount of water in the exhaust air, and an air drain measuring device 50 is used instead of the fuel gas drain measuring device 44 of FIG. The air drain measuring device 50 receives the output signal 47 of the current converter 48, calculates a standard air drain water flow rate at a predetermined discharge air flow rate in a normal operating state corresponding to the output current, and calculates the standard value and the above-mentioned value. The method is to determine whether or not the water content in the exhaust air is appropriate by comparing the measured value by the electric signal 45, and the other is the same as the fuel gas drain measuring device 44. The other components have the same functions as those in FIG. 1, and duplicate explanations are omitted.

FIG. 3 is a block diagram of an abnormality detection circuit of an exhaust gas moisture content measuring system showing another embodiment of the fuel cell power generator of the present invention. In the present embodiment, the measured values of the fuel gas drain water flow rate and the air drain water flow rate obtained by the fuel gas drain measurement device 44 and the air drain measurement device 50 shown in FIGS. A standard value calculated from the output current measurement signal 55 sent to the drain water abnormality detector 53 as the flow rate measurement signal 54 and the air drain water flow rate measurement signal 56 and obtained by the current converter 48 shown in FIGS. 1 and 2. The abnormality is detected in comparison with. That is, in the drain water abnormality detector 53, the difference between the fuel gas drain water flow rate measured by the fuel gas drain water flow rate measurement signal 54 and the air drain water flow rate measurement signal 56 is calculated, and the output current measurement signal is calculated. From 55, the difference between the standard fuel gas drain water flow rate and the air drain water flow rate at the predetermined exhaust air flow rate in the normal operating state of the fuel cell corresponding to the output current is calculated. Furthermore, from these values, the difference between the measured value of the difference between the fuel gas drain water flow rate and the air drain water flow rate and the standard value is calculated, and if the calculated difference exceeds the predetermined range, the positive or negative drain water An abnormal signal 57 is emitted.
When the drain water abnormality signal 57 is positive, the increase in the fuel gas drain water flow rate is larger than the increase in the air drain water flow rate, which indicates that air leaks and permeates to the fuel electrode. On the other hand, when the drain water abnormality signal 57 is negative, it means that leakage and permeation of the fuel gas to the air electrode is occurring.

Therefore, in the abnormality detecting circuit of this system, not only the occurrence of the abnormality can be detected by the single signal, but also the abnormality generating electrode can be detected.

[0028]

As described above, in the present invention, a fuel electrode comprising a fuel electrode base material having a plurality of fuel gas passage grooves and a fuel electrode catalyst layer, and an air electrode base having a plurality of air passage grooves. A single cell formed by sandwiching a matrix containing an electrolyte body with an air electrode composed of a material and an air electrode catalyst layer is alternately laminated with a separator, and a cooling plate is appropriately inserted to form a laminated fuel cell body, In a fuel cell power generator that obtains DC power by an electrochemical reaction by passing fuel gas through the fuel gas passage and air through the air passage, the fuel gas after passing through the fuel gas passage is In the case where the fuel gas exhaust pipe and the air after passing through the air flow groove are exhausted independently by the air exhaust pipe respectively, the amount of water in the exhaust gas should be adjusted to both the fuel gas exhaust pipe and the air exhaust pipe. A measuring device for the amount of water produced Since it is decided to install it, if leak permeation of the reaction gas between the air electrode and the fuel electrode occurs, the increase in the amount of water in the exhaust gas caused by the leak permeation can be measured. It has become possible to obtain a fuel cell power generator that can detect leakage and permeation of the reaction gas in the fuel cell and can perform maintenance for extending the service life at an early stage.

Furthermore, a suction pump for branching the generated water amount measuring device from the discharge pipe to suck the gas, a flow meter for measuring the flow rate of the sucked gas, and a flow rate for feeding back the measured flow rate to control the suction pump. If it consists of a controller, a gas cooler that separates the moisture in the sucked gas, a water meter that measures the amount of separated water produced, and a measuring device therefor, the amount of water contained in the exhaust gas will be very small. Since it is possible to measure the change, even if there is a small amount of leakage and permeation of the reaction gas between the electrodes, it is possible to detect this early and accurately, and it is possible to detect it between both electrodes of the fuel cell body. It is suitable to obtain a fuel cell power generation device that can detect the leakage and permeation of the reaction gas and can perform maintenance for extending the service life at an early stage.

Furthermore, the two produced water amount measuring devices attached to the fuel gas exhaust pipe and the air exhaust pipe are input to the two produced water amount measurement outputs, the difference between them is calculated, and the difference is calculated. If it is connected to an anomaly detector that emits an anomaly signal when the difference from the reference value exceeds the set range, leakage and permeation of air from the air electrode to the fuel electrode and leakage of fuel gas from the fuel electrode to the air electrode Since it is possible to know both of the permeation by the same signal, it is possible to detect the leakage and permeation of the reaction gas between both electrodes of the fuel cell body, and as a fuel cell power generation device that can perform maintenance for extending the life early. It is effective.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an exhaust gas moisture content measurement system showing an embodiment of a fuel cell power generator of the present invention, and is a configuration diagram of a system for continuously measuring the moisture content provided in a fuel gas exhaust system.

FIG. 2 is a configuration diagram of an exhaust gas moisture content measurement system showing an embodiment of a fuel cell power generator of the present invention, and is a configuration diagram of a system for continuously measuring the moisture content provided in an air exhaust system.

FIG. 3 is a block diagram of an abnormality detection circuit of a water content measuring system of exhaust gas showing another embodiment of the fuel cell power generator of the present invention.

FIG. 4 is a cross-sectional view of essential parts showing the basic configuration of a laminated fuel cell body.

FIG. 5 is a plan view showing a flow of a reaction gas in a laminated fuel cell body.

[Explanation of symbols]

 1 Matrix 2 Fuel Electrode Catalyst Layer 3 Fuel Electrode Base Material 3a Fuel Gas Flow Groove 4 Reservoir Plate 5 Air Catalyst Layer 6 Air Electrode Base Material 6a Air Flow Groove 7 Separator 8 Sealing Material 9A, 9B Seal 10 Fuel Cell Main Body 11 Air Supply manifold 12 Air discharge manifold 13 Fuel gas supply manifold 14 Fuel gas discharge manifold 15,16 Output terminal 20 Sampling pipe 21 Heater 22 High temperature gas cooler 23 Secondary cooling pipe 24 Primary cooling pipe 26 Automatic drain valve 27 Electronic cooler 31 High temperature Side drain water 32 Low temperature side drain water 33 Metering drain water 34 Sampling gas flow meter 35 Flow rate converter 36 Flow rate controller 37 Electric signal 38 Control output 39 Drain water measuring container 40 Drain solenoid valve 42 Water meter 43 Suction pump 44 Fuel gas drain measurement Device 45 Air signal 46 the control signal 47 output signal 48 to current converter 50 the air drainage measuring device 53 drain water anomaly detector 54 fuel Gasudoren water flow rate measurement signal 55 output current measurement signal 56 air drain water flow measurement signal 57 drain water abnormality signal

Claims (3)

[Claims] 1. A fuel electrode comprising a fuel electrode base material having a plurality of fuel gas flow channels and a fuel electrode catalyst layer, and an air electrode comprising an air electrode base material having a plurality of air flow channels and an air electrode catalyst layer. A unit cell formed by sandwiching a matrix containing an electrolyte body with is alternately laminated with a separator, and a cooling plate is appropriately inserted to form a laminated fuel cell body, and a fuel gas is introduced into the fuel gas flow groove. Further, in a fuel cell power generation device in which air is passed through the air flow groove to obtain direct current power by an electrochemical reaction, the fuel gas after passing through the fuel gas flow groove is discharged by a fuel gas discharge pipe, In the one in which the air after flowing through the air flow groove is independently discharged by the air discharge pipe, the amount of generated water for measuring the amount of moisture in the exhaust gas in both the fuel gas discharge pipe and the air discharge pipe A measuring device is attached Fuel cell power generation system according to claim Rukoto. 2. The fuel cell power generator according to claim 1, wherein the generated water amount measuring device is a suction pump for branching from the discharge pipe and sucking gas, a flow meter for measuring the sucked gas flow rate, and a measured flow rate. The fuel is characterized by comprising a flow controller for feeding back the suction pump to control the suction pump, a gas cooler for separating the water content in the sucked gas, a water meter for measuring the amount of generated water separated, and a measuring device therefor. Battery generator. 3. The fuel cell power generator according to claim 1 or 2, wherein the two generated water amount measuring devices attached to the fuel gas discharge pipe and the exhaust gas discharge pipe are
Input the generated water quantity measurement output, calculate the difference,
Further, the fuel cell power generator is connected to an abnormality detector that emits an abnormality signal when the difference between the difference and the reference value exceeds a set range.