JP2008123916A - Fuel cell power generation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that since a power generation system using a fuel cell needs a transportation means or the like such as a high pressure cylinder when supplying hydrogen to the fuel cell as a fuel, it is disadvantageous in terms of easiness and cost, that there is a problem about hydrogen supplementation, and further that since the fuel and a secondary battery which is an auxiliary power supply and necessary for continuous operation uses a lead acid battery, a pollution causative material from lead/sulfuric acid becomes a problem. <P>SOLUTION: Regarding a less environmentally destructive fuel cell power generation system, a hydrogen generation device constituting the system does not need to use the transportation means such as the high pressure cylinder, uses an electrolysis system utilizing an electrolysis tank of easy maintenance having eco-friendly alkaline electrolytic solution as a raw energy source, uses a lead free battery using no lead/sulfuric acid as the secondary battery which is the auxiliary power supply and another component of the fuel cell power generation system, and provides a less environmentally destructive constitution as the whole power generation system. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fuel cell power generation system. More specifically, hydrogen supply to a fuel cell module of this system is performed by an easily maintainable electrolysis system that does not use high-pressure hydrogen and uses an electrolytic solution without environmental destruction as a source of energy. The present invention relates to a power generation system that includes a hydrogen generator, does not use lead and sulfuric acid as a secondary battery of the fuel cell module, and includes an auxiliary power supply having good quick charge / discharge characteristics.

  It has been said that fossil fuels such as coal, gasoline, and light oil will disappear during the 21st century, considering future energy consumption. More importantly, global environmental problems such as global warming and acid rain have become serious due to the burning of fossil fuels. Therefore, clean energy that burns hydrogen, which is clean energy friendly to the global environment that does not generate harmful substances such as carbon dioxide and nitrogen oxides even when burned, has attracted attention. That is, a fuel cell that can continuously obtain electrochemical energy by continuously feeding hydrogen fuel and oxidant from the outside has attracted attention due to its high efficiency and high performance.

  In the fuel cell, energy is generated by burning hydrogen and causing a chemical reaction between hydrogen and oxygen through a process reverse to the electrolysis of water, and outputting it as electric energy.

  Thus, several methods have been proposed in the past to generate the hydrogen required for fuel cells, but the performance depends largely on the electrolyte used, especially the content of the solid electrolyte, and conditions for generating safe and low-cost hydrogen. Was not necessarily established.

  For example, a polymer membrane that is normally used as a solid electrolyte at a high temperature has been difficult to maintain due to the rapid deterioration of ion exchange membranes and electrodes.

  In addition, although a method for producing low-cost hydrogen by a large-scale plant has been established, for example, to deliver hydrogen gas near the user for vehicles and to manipulate hydrogen as easily as a gas station, A 600-bar high-pressure hydrogen cylinder is required, but it has not been a technology that can handle this safely.

  In relation to these technologies, for example, Patent Document 1 uses a high-pressure hydrogen gas and hydrogen generated by electrolysis of pure water, and a fuel cell in which a solid polymer electrolyte membrane part and an oxidation part are integrated in a cell shape. And the technique of refine | purifying circulating water using the high voltage | pressure of high pressure hydrogen gas and producing | generating pure water was disclosed.

  On the other hand, the secondary battery as an auxiliary power supply device of the fuel cell is also one of the configurations that prevents the fuel cell power generation system from destroying the global environment.

  Therefore, unlike conventional secondary batteries, the electrode plate does not use lead, the electrolyte does not use sulfuric acid, does not use pollutants such as lead and sulfuric acid, and has high performance, high capacity, and assistance to fuel cells A lead-free battery with excellent rapid charge / discharge characteristics was required to increase the efficiency of the power supply.

  Conventional lead batteries have been widely used as typical secondary batteries for a long time, and their materials and structures have been improved to improve their performance and life. In addition, improvements to the electrode plate, separator, and battery case have led to maintenance-free and shield-type batteries.

  However, in addition to the problem that the energy capacity is low and heavy and bulky, the use of sulfuric acid as an electrolyte generally increases the internal resistance of the battery because sulfuration tends to occur when the performance is improved.

  Further, as the sulfuration progresses, the movement of ions becomes difficult and the operation becomes impossible, resulting in disposal, but the disposal of sulfuric acid / electrode lead pollutants is not easy.

  In addition, when a lead battery is used under heavy load, both the electrode plate and the electrolyte are depleted. In particular, in the case of the shield type battery described above, it is impossible to replenish the electrolyte as well as the electrode plate.

  Therefore, some improvements have been made to the internal structure of the battery and the electrolyte solution. However, in most cases, the performance of the battery is deteriorated, and a risk factor as a pollutant specific to the material cannot be avoided.

  For example, regarding improvement of the internal structure of a lead battery, as disclosed in Patent Document 2, a control valve in which a catalyst is arranged on the lid of an electrolytic solution tank is provided, and water generated by efficiently reacting a gas generated in the battery. And a technique for preventing sulfurization of the negative electrode. Since the lead battery has the above-mentioned problems, its use and usage are limited.

  Therefore, with the recent spread of portable devices, lithium ion batteries that can avoid the above-described problems of lead batteries to some extent have become popular as secondary batteries. That is, the lithium ion battery has high energy density, small size, light weight, and low pollution.

  However, the lithium ion battery has a problem that the manufacturing cost is high, the cycle life is about 300 times, and the cycle life is lower than about 1000 times of the lead battery, so that the running cost is more expensive.

  Lithium ion batteries have no resistance to overdischarge and overcharge. In particular, when overcharge occurs, the battery overheats, and when it exceeds about 130 ° C., the battery bursts and discharges the electrolyte.

  Therefore, when the inside of the battery is about to burst at a high temperature, a method of letting gas escape from a part of the gasket of the encapsulating part, a method of letting the gas escape by the lid part (positive electrode terminal) jumping, or destroying the internal separator Methods have been developed to suppress the generation of gas by short-circuiting.

Alternatively, Patent Document 3 discloses a technique for reducing the risk of fire when a flammable organic solvent is used as a solvent for an electrolytic solution by using a gel-like non-aqueous electrolytic solution.
JP 2000-149971 A JP 2001-148256 A Japanese Unexamined Patent Publication No. 09-270271 (pages 2, 3 and 1)

The present invention seeks to provide a fuel cell power generation system that solves the above-mentioned problems and has little environmental destruction.
That is, (1) Hydrogen supply to the fuel cell does not require the use of a hydrogen transport means such as a high-pressure cylinder, and is an electrolysis system using an easily maintainable electrolytic cell that uses an alkaline electrolyte without destruction of the environment as a source of energy. A first object is to provide a hydrogen generator in the system configuration.

  In addition, (2) as a secondary battery of the fuel cell, it is a high-performance and capacity battery that does not use lead for the electrode plate, does not use sulfuric acid for the electrolyte solution, has no pollutants, and assists the fuel cell. The secondary battery module is divided into two groups as the power source, and the charge input from the fuel cell is performed in one group, and the discharge output to the load is performed in the other group. It is a second object of the present invention to provide an auxiliary power supply device using a secondary battery excellent in rapid charge and rapid discharge characteristics in the system configuration.

In order to solve the above-described problems, a fuel cell power generation system according to the present invention includes a hydrogen generator having an electrolysis system that supplies hydrogen to a fuel cell module using an electrolyte as an original energy source, and an auxiliary power supply for the fuel cell module. As a fuel cell power generation system comprising a secondary battery module having good quick charge / discharge characteristics,
The hydrogen generator includes a first tank, which is a chemical reaction tank having a catalyst and injected with an alkaline electrolyte, a first section having a negative electrode and supplied with pure water, and a positive electrode and supplied with pure water. A second tank that is an electrolytic cell comprising: a third compartment; and a second compartment in contact with the first and third compartments and infused with an alkaline electrolyte through the first and second ion exchange membranes, respectively. ,
A first pipe for flowing an alkaline electrolyte in the first section of the second tank to the first tank;
A second pipe for flowing pure water decomposed by the catalyst into the first tank and the third section through the pump when the alkaline electrolyte is introduced into the first tank;
When applied to the pump second terminal and the negative electrode and the first terminal of the second tank, with the first vessel pure water and hydrogen gas H ₂ is decomposed alkaline electrolyte occurs, in the second tank a second compartment is decomposed alkaline electrolyte part, the hydrogen gas H ₂ and alkaline electrolyte is generated from the first compartment, the hydrogen gas H ₂ generated in the first and second tank was supplied to the fuel cell module, the carbon dioxide It is characterized by low emission of harmful substances of nitrogen oxides.

  The battery module is composed of a plurality of 1-unit cells connected in series, and each cell is an alkaline aqueous solution used between an electrode in which calcium, silver oxide and carbon are mixed in the anode, and an electrode in which zinc and carbon are mixed in the cathode. It is characterized in that lead and sulfuric acid are not particularly used.

The battery module includes two sets of first and second battery modules that output the same DC voltage value,
A first switch is provided between the fuel cell module and the first and second battery modules, and a second switch is provided between the drive motor as a load and the first and second battery modules,
The battery module A is disconnected and connected to the battery module B by the electronic control B selection signal to the first switch, and simultaneously connected to the battery module A and the battery module B by the electronic control A selection signal to the second switch. Is disconnected A discharge B charge mode,
The electronic control A selection signal to the first switch connects to the battery module A and B is disconnected. At the same time, the electronic control B selection signal to the second switch connects to the battery module B and A is disconnected. A two-state mode consisting of A charge B discharge mode,
Charge / discharge mode for measuring the power consumption and remaining amount of battery modules A and B and sending an electronic control signal to the first and second switch to switch the two-state mode when the remaining amount is below the predetermined remaining amount. A control unit including at least a switching unit is provided.

  The first tank is provided with a member connected to the catalyst in the first tank and an electrode capable of applying a positive voltage via the alkaline electrolyte, and power energy is applied between the member and the electrode. The third terminal is disposed, and the progress of the chemical reaction in the first tank can be controlled by the voltage applied to the third terminal.

  The first ion exchange membrane of the second tank is a cation exchange membrane, and the second ion exchange membrane is an anion exchange membrane.

The fuel cell power generation system of the present invention exhibits the following effects.
Since an electrolysis system comprising an electrolytic cell and a chemical reaction vessel is used for supplying hydrogen, it is safe and lightweight without using high-pressure hydrogen or high-pressure cylinders.
No infrastructure development such as a high-pressure station is required for hydrogen fuel supply.

  The electrolytic solution of the electrolysis system is an inexpensive energy source having a pH of about 9 to 14, has little component consumption, is easy to maintain, and is economical.

  Furthermore, since the oxygen generated in the hydrogen generator and the pure water generated in the fuel cell can be used for reduction, a closed system can be formed by replenishing only the electrolytic solution, which is effective for the global environment.

  Secondary batteries do not use lead and sulfuric acid, do not contain pollutants, and are easy to dispose of. The weight is light and the envelope can be constructed with a small weight.

  Since quick charge and discharge have better characteristics than lead batteries, the secondary batteries can be divided into two groups and the charge / discharge switching can be performed efficiently. That is, the system can withstand a load heavier than before.

  Embodiments of the fuel cell power generation system of the present invention will be specifically described below with reference to the drawings.

  FIG. 1 shows the configuration of the entire system. Here, 1 indicates a chemical reaction tank, 2 indicates an electrolysis tank, and the hydrogen generator comprises a first tank of the chemical reaction tank 1 and a second tank of the electrolysis tank 2.

A detailed structural diagram of the hydrogen generator (1 + 2) is shown in FIG.
The first tank 1 is provided with a third terminal 77 provided with a catalyst 14 and a negative electrode 15 and serving as a − + terminal thereof, and an alkaline electrolyte 11 is injected into the first tank 1.

  On the other hand, the second tank 2 is divided into first, second, and third sections by the first and second ion exchange membranes 25 and 26, and the first section 21 is provided with a negative electrode 24, and pure water is supplied. Have been supplied. The third compartment 23 is provided with a positive electrode 26 and is supplied with pure water. The second compartment 22 is in contact between the first compartment 21 and the second compartment 23, and an alkaline electrolyte is injected.

  Reference numeral 36 denotes a first pipe, which is a first pipe 36 for flowing the liquid into the first tank 1 when an alkaline electrolyte is generated in the second tank 2 and the first section 21.

  Reference numeral 37 denotes a second pipe. When the alkaline electrolyte flows into the first tank 1, pure water generated by decomposition by the catalyst 14 is passed through the filter 16, and the second tank 2 first section 21 is passed through the pump 18. And a second pipe 37 for flowing into the third section 23 via the pipes 38 and 39.

A pipe 33 for taking out the generated hydrogen gas H ₂ is provided in the upper part of the first tank 1, a pipe 31 for taking out the generated hydrogen gas H ₂ is provided in the upper part of the first section 21 of the second tank 2, and a second tank 2. In the upper part of the third section 23, there is a pipe 32 for taking out the generated oxygen gas O _{2. The} hydrogen gas H ₂ taken out by the pipe 33 and the pipe 31 is collected in the pipe 34, and the hydrogen gas H ₂ pipe 34 and oxygen The piping 32 of the gas O ₂ is sent to the fuel cell module 3 at the next stage described later.

The pure water H ₂ O from the fuel cell module 3 is joined to the pipe 37 (second pipe) via the pipe 35 via the pipe, and the joined pure water is supplied to the second tank 2 by the pump 18. The first compartment 21 and the third compartment 23 are allowed to flow.

  The hydrogen generator (1 + 2) as described above further includes a first terminal 78 for applying to the positive and negative electrodes 26 and 24 for operating the electrolytic cell (second tank), and a second for rotating the pump 18. The terminal 76 is further provided with a third terminal 77 for application between the connection support member of the electrode 15 and the catalyst 14 in order to suppress the decomposition progress rate of the catalyst 14 in the first tank and prevent the alkaline electrolyte from being consumed.

Here, if applied to the second terminal 76 of the first terminal 78 and the pump 18 of the second vessel 2 in the positive and negative electrodes, the first tank 1, the hydrogen gas H ₂ is decomposed alkaline electrolyte when the pure water is generated At the same time, in the second tank second section 22, the alkaline electrolyte is decomposed, part of which passes through the first ion exchange membrane (cation exchange membrane) 25, and the first section 21 contains hydrogen gas H _2. Generation and alkaline electrolyte.

On the other hand, the other part passes through the second ion exchange membrane (anion exchange membrane) 29 and at least oxygen gas O ₂ is generated in the third section 23.

The hydrogen gas H ₂ and oxygen gas O ₂ generated here are supplied to the fuel cell module 3 via a pipe.

Next, the hydrogen fuel cell module 3 shows a state in which N hydrogen fuel cell unit cells are connected in series in this embodiment. Specifically, about 10 are connected.
Accordingly, each pipe of hydrogen gas and oxygen gas to be supplied is connected to each unit cell.

  The pure water produced from each fuel cell unit cell may be refluxed to the second tank of the hydrogen generator as shown in the figure, but may be discharged.

  A and B show battery modules having the same performance characteristics as secondary batteries. Each unit cell shown in FIG. 3A is connected in series as shown in FIG. 3B to form one pack. FIG. 1 shows an embodiment in which three battery modules are connected in parallel.

  The auxiliary power supply 5 (A + B) of this system is used as follows. When one set of battery modules A and B is discharging from one module A to a load (for example, drive motor 7), the other module B is charged from the fuel cell module 3.

  Here, at least when the battery module A becomes equal to or less than a predetermined remaining charge, the first switch 4 and the second switch 6 are switched to charge the module A from the fuel cell module 3 and from the module B. Discharge to the load. That is, there are two states of charge / discharge modes.

  However, the module B needs to be equal to or more than a predetermined charge amount at the switching timing.

  Therefore, the charging characteristics of the battery modules A and B need to have a short time until the charging is completed, while the discharging characteristics require a long time until the voltage drops due to discharging.

  FIGS. 4 (b) and 4 (c) are diagrams comparing the charge characteristics and discharge characteristics of a lead-free battery used for an auxiliary power source secondary battery and a conventional lead battery.

  Returning to FIG. 1, reference numeral 9 denotes a control unit of the entire fuel power generation system, and the control unit 9 includes at least the two-state charge / discharge mode switching means. By this means, the control unit 9 sends an electronic control signal to the first switch 4 and the second switch 6 so that the two-state mode is switched alternately as shown below.

  As shown in FIG. 1, a first switch 4 is provided between the fuel cell module 3 and the first and second battery modules A and B, and a drive motor 7 and first and second batteries as loads are provided. Between the modules A and B, the second switch 6 is connected to the battery module B by an electronic control B selection signal to the first switch 4 and the battery module A is disconnected, and at the same time to the second switch 6. A battery B is connected to the battery module A by the electronic control A selection signal, and the battery module B is disconnected.

  B is disconnected and connected to the battery module A by the electronic control A selection signal to the first switch 4, and at the same time, the battery module B is connected and A is disconnected by the electronic control B selection signal to the second switch 6. A two-state mode consisting of an A charge B discharge mode.

  The control unit 9 measures each power consumption and remaining amount of the battery modules A and B, and electronically controls the first and second switchers 4 and 6 to switch the two-state mode when the battery module A and B become less than a predetermined remaining amount. It has at least charge / discharge mode switching means for sending a signal.

  A lead-free battery having a cell structure of battery modules A and B is shown in FIG. 3, and its characteristics are shown in FIG. 4. The internal structure of the anode and cathode of the lead-free battery, in particular, its manufacturing flowchart is shown. As shown in FIG. Details of the lead-free battery will be described below.

  FIG. 3A is an internal structure diagram of a lead-free battery for each cell. Here, a and b represent an anode terminal and a cathode terminal, respectively. c and d represent a cathode plate and an anode plate, respectively, and e represents an alkaline aqueous solution. f is a separator that selectively allows hydroxide ions to pass therethrough, and g denotes an envelope thereof.

  5A and 5B show the structures of the cathode plate c and anode plate d of the lead-free battery in FIG. 3A, FIG. 5A is a flowchart of the structure of the anode plate d, and FIG. 5B is a flowchart of manufacturing the cathode plate c. .

  For the anode plate d, an electrode substrate in which a white copper plate is meshed as an electrode base material is first manufactured. A positive terminal a is provided in advance at one end.

Next, a binder is put into calcium (Ca), silver oxide (Ag ₂ O), and carbon on the grains and mixed to form a paste, which is applied to the white copper plate mesh electrode substrate.

  After the application, the paste is dried and baked to complete the production of the anode plate d.

  On the other hand, for the cathode plate c, an electrode substrate in which a zinc plate is meshed as an electrode base material is first manufactured. One terminal is provided in advance at one end.

  Next, zinc (Zn) and particle carbon are mixed with a binder, and the paste is applied to the zinc plate mesh electrode substrate.

  After the application, the paste is dried and baked to complete the production of the cathode plate c.

Here, the composition of calcium (Ca), silver oxide (Ag ₂ O), carbon in the anode plate d and the composition of zinc (Zn) and carbon in the cathode plate c are set in the following ranges, respectively.
Anode calcium 40-60%, silver oxide 20-30%, carbon 10-40%
Cathode Zinc 60-90%, Carbon 10-40%

Next, the operation as a battery in the above configuration will be described.
The reaction formula of the electrode is as follows, and 2e flows from the negative electrode to the positive electrode.
Positive electrode Ag ₂ O + H ₂ O + 2e ⁻ → 2Ag + 2OH ⁻
Negative electrode Zn + 2OH ⁻ → ZnO + H ₂ O + 2e ⁻
2OH generated at the positive electrode moves to the negative electrode through the separator.

Although the above reaction formula is described based on silver, in the reaction of calcium ions, Ca ⁺² is released during charging and is adsorbed mainly on carbon of the negative electrode material (plate). At the time of discharge, the calcium ions Ca ⁺² are separated from the carbon and returned to the anode material (plate).

  Ca ions have a large ion radius (0.99), and the negative electrode material that stores the ions during charging depends greatly on the performance.

  However, since Ca ions have divalent cations, they have high voltage (1.8 V to 3.0 V per cell), high capacity and high energy density.

  The module and the lead-free batteries A and B are a composite battery of a characteristic of Ca ions and a conventional silver-zinc battery.

  Comparing the energy density, the silver-zinc battery is about three times as large as the zinc battery, so that it can be reduced in size and weight.

  In FIG. 3B, a battery with a capacity of 1 cell 2.5 V, 4000 mA to 5000 mAh is set to 12.5 V with 5 cells. The unit cell is a unit cell in which the facing area is increased to increase the capacity.

  Next, FIG. 4 shows a comparison diagram between the lead-free battery and the lead battery of modules A and B.

  FIG. 4 (a) compares the capacity, weight, and electrolytic solution for obtaining the performance with a capacity of about 60 Ah. It is clear that less lead-free batteries with capacity and weight of modules A and B may be used.

  FIG. 4B is a diagram comparing the charging characteristics of the lead-free battery and the lead battery of modules A and B. The lead-free battery is compared as being equivalent to 40 Ah. The difference in time from 10.80V to 12.5V indicates that there is a time difference of 1.0H and 3.8H.

  FIG. 4C is a diagram comparing the discharge characteristics of the lead-free battery and the lead battery of modules A and B each having a capacity of 40 Ah.

  The time from 12.5 V to 10 A constant current discharge to the end voltage of 10.8 V is 3.5H and 2.2H, respectively.

  Although the above lead-free battery has a low starting voltage of 8.0 V and can be discharged for a long time, a general lead battery has a starting voltage of 10.8 V. Therefore, measurement is performed in FIG. Conditions are adjusted to 10.8V for lead batteries.

  Returning to FIG. 1, the output of the second switch 6 is connected to the load side, but a part thereof is connected to the first to third terminals. The power sources for the first and second terminals, which are required when the fuel cell power generation system is first started up, are applied from here.

  The output of the second switch 6 is applied to the drive motor 7, and the generator 8 is rotated via the rotational drive transmission unit 7a (gear drive or belt drive), and the output is required by the power output converter 8a. A predetermined voltage specification AC or DC power is output to the load.

Example configuration diagram of a fuel cell power generation system Example structure diagram of hydrogen generator Lead-free battery cell structure and its battery module Comparison diagram between lead-free battery and lead-acid battery Lead-free battery anode / cathode internal structure diagram

Explanation of symbols

A, B Battery module 1 Chemical reaction tank, 1st tank 2 Electrolytic tank, 2nd tank 3 Fuel cell module 4 1st switch 5 Auxiliary power supply device 6 2nd switch 7 Drive motor 7a Rotation drive transmission part 8 Electric power generation Machine 8a Power output converter 11 Alkaline electrolyte in first tank 14 Catalyst 15 Electrode 16 Filter 18 Pump 21-23 First to third compartments 24, 26 Negative, positive electrodes 25, 29 First and second ion exchange membranes 31 , 33, 34 Hydrogen gas piping 32 Oxygen gas piping 36, 37 First and second piping 78, 76, 77 First to third terminals

Claims (5)

A hydrogen generator having an electrolysis system that supplies hydrogen to a fuel cell module using electrolyte as an original energy source, and a secondary battery module having good quick charge / discharge characteristics as an auxiliary power supply for the fuel cell module A fuel cell power generation system,
The hydrogen generator includes a first tank, which is a chemical reaction tank having a catalyst and injected with an alkaline electrolyte, a first section having a negative electrode and supplied with pure water, and a positive electrode and supplied with pure water. A second tank that is an electrolytic cell comprising: a third compartment; and a second compartment in contact with the first and third compartments and infused with an alkaline electrolyte through the first and second ion exchange membranes, respectively. ,
A first pipe for flowing an alkaline electrolyte in the first section of the second tank to the first tank;
A second pipe for flowing pure water decomposed by the catalyst into the first tank and the third section through the pump when the alkaline electrolyte is introduced into the first tank;
When applied to the positive and negative electrode first terminals and the pump second terminal of the second tank, the alkaline electrolyte is decomposed in the first tank to generate hydrogen gas H ₂ pure water, and the second tank in the second section is alkaline. electrolyte is decomposed part, the hydrogen gas H ₂ and alkaline electrolyte is generated from the first compartment, the hydrogen gas H ₂ generated in the first and second tank was supplied to the fuel cell module, carbon dioxide, A fuel cell power generation system characterized by low emissions of toxic substances of nitrogen oxides.   The battery module is composed of a plurality of 1-unit cells connected in series, and each cell is an alkaline aqueous electrolyte used between an electrode mixed with calcium, silver oxide and carbon at the anode and an electrode mixed with zinc and carbon at the cathode. The fuel cell power generation system according to claim 1, wherein the fuel cell power generation system comprises a solution and does not particularly use lead and sulfuric acid. The battery module includes two sets of first and second battery modules that output the same DC voltage value,
A first switch is provided between the fuel cell module and the first and second battery modules, and a second switch is provided between the drive motor as a load and the first and second battery modules,
The battery module A is disconnected and connected to the battery module B by the electronic control B selection signal to the first switch, and simultaneously connected to the battery module A and the battery module B by the electronic control A selection signal to the second switch. Is disconnected A discharge B charge mode,
The electronic control A selection signal to the first switch connects to the battery module A and B is disconnected. At the same time, the electronic control B selection signal to the second switch connects to the battery module B and A is disconnected. A two-state mode consisting of A charge B discharge mode,
Charging / discharging mode switching for measuring the power consumption and remaining amount of battery modules A and B and sending an electronic control signal to the first and second switch to switch the two-state mode when the remaining amount is below a predetermined remaining amount The fuel cell power generation system according to claim 1, further comprising a control unit having at least means.   The first tank is provided with a member connected to the catalyst in the first tank and an electrode capable of applying a positive voltage via the alkaline electrolyte, and the first tank applies power energy between the member and the electrode. 3. The fuel cell power generation system according to claim 1, wherein three terminals are provided, and the progress of a chemical reaction in the first tank can be controlled by an applied voltage of the third terminal.   2. The fuel cell power generation system according to claim 1, wherein the first ion exchange membrane of the second tank is a cation exchange membrane, and the second ion exchange membrane is an anion exchange membrane.

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