JPS59111272A - Fuel-cell control device - Google Patents

Abstract

PURPOSE:To provide a fuel-cell control device which can control flow rates at which oxygen and hydrogen are supplied to a fuel cell commensurately with the load of the fuel cell while controlling the fifferential pressure between the supplied oxygen and hydrogen without mixing them. CONSTITUTION:Pressure signals (PH) and (PO) obtained through pressure-detecting elements 16 and 17 installed in downstream from flow-rate controlling valves 6 and 7 are sent to a computer unit 18 where the pressures of the oxygen and the hydrogen sides are compared with each other to obtain a signal of high value preferred operation by which a pressure control valve 10 or 11 is driven. Owing to the operation of the valve 10 or 11, the fluid of higher pressure is exhausted downstream from an exhaust check valve 8 or 9, after bypassing the fuel cell body 5. In addition, even in a state of emergency when a pressure difference becomes over 0.7kg/cm<2> at the time of a sudden change in the supply pressure of oxygen or hydrogen or supply pressure of either oxygen or hydrogen becomes abnormally high, any breakage of an electrolyte chamber 1 can be prevented by driving either pressure-controlling valve 10 or 11 on higher pressure side.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] Motoaki Motoki is involved in the rapid control of hydrogen and air supply in fuel-magnetic equipment. [Technical background of the invention] Power generation equipment uses natural resources such as fossil fuels, geothermal heat, and uranium, and in order to convert these energies into brewing power, thermal power generation equipment, geothermal 9 tons = electric equipment , nuclear power 91'rJX
It is well known that these facilities are actively used, but these facilities are on the verge of becoming extremely large due to the dramatic increase in Japan's capacity requirements. As the scale of power generation equipment increases, it becomes difficult to find a suitable location, and if power generation equipment becomes extremely large, many pollution problems such as heated wastewater and exhaust gas will occur, creating a harsh environment. Even if land is secured for the equipment, the power source and water power required for construction cannot be obtained because the land is landlocked, resulting in a prolonged construction period and the need to build a land in a land with no demand for power. The production and installation of powerful power transmission line equipment also poses a number of problems, such as requiring a large amount of cost and labor.

By the way, recently, fuel cell starting equipment has been in the spotlight as one of the energy-saving, light-duty, non-polluting, compact, light-duty, non-polluting devices, and research is being conducted day and night.

As is well known, this single fuel tank facility reacts hydrogen and oxygen and extracts the electronic energy generated by the reaction.

Here, using FIG. 1, we will explain in detail how the fuel cell is developed. Reference numeral 5 indicates the fuel cell main body, and the fuel cell main body 5 has guide holes on both sides with a 4% liquid chamber 1 in between. Low quality anode 2. The hydrogen chamber 2a is also connected to the cathode 3. The mixing chambers 8a are each opened one after another, and the water g1 sent to the tail and water flow 2a (is 112→2H+2 at the anode 2).
The hydrogen ion 1 produced by this reaction leaves the electrolyte chamber 1 and is sent to the cathode 3, where it combines with oxygen 0 from the Kuntai chamber 3a, Water W
While a is generated, the electron e- obtained at the anode 2
is sent to the cathode 3 following the external 4
, +28- +2-g--+H, Oc7) A four-gas chemical reaction is carried out, and as a result, a pressure is obtained.

[Problems with background art]

By the way, due to its structure and material, the electrolyte chamber 1 may be destroyed if the differential pressure between the hydrogen chamber 2a and the mixing chamber 3a exceeds 0.7 kp77. Therefore, based on the above-mentioned circumstances, the present invention proposes to mix the pressure difference between hydrogen and oxygen supplied to the fuel cell. The turtle can also adjust the folds to match the load of the fuel cell while controlling it.
[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to FIG. 2.

The supply system for hydrogen and hydrogen to the fuel tank main body 5 includes Tani lAf, quantity valves 6 and 7, hydrogen chamber 2a, and mixture M3a.
Exhaust check valves 8 and 9 are installed at the outlets of the hydrogen chamber 2a, and pressure regulating valves 10 and 11 are installed to bypass each chamber from the inlet of the hydrogen chamber 2a and the mixing chamber 3a. Note that the electrical circuit is omitted.

Each flow rate m;
O% fuel cell actual output 1g W and output setting signal W8
Qo, each exhaust check valve 8.9 operates according to the calculation output signal of the calculation unit 14.15 which receives and compares the output signal, and controls the output of the fuel cell to the set output. When the exhaust pressure is higher than the exhaust pressure, the exhaust gas is installed in each chamber to prevent it from flowing and hindering the normal chemical reaction, and the exhaust pressure is automatically closed by the upper row.

On the other hand, the pressure 1g P are compared and calculated, and the pressure control valve 10 or 11 is operated based on the calculation output signal giving priority to the incorrect value. Due to this operation, the pressure fluid bypasses the fuel + i4 pond I4-5 and 1) l: nu () under the check valve 8 or 9.
ll is exhausted.

In addition, during an emergency situation, when the supply pressure of hydrogen or oxygen suddenly changes, the differential pressure drops to 0.7 or more, or the supply pressure becomes abnormally high. By operating the higher pressure adjustment valve 10 or 11, it is possible to prevent the electrolyte chamber 1 from being ruptured.

〔Effect of the invention〕

As described above, according to the present invention, the supply differential pressure between hydrogen and oxygen can be adjusted safely without mixing hydrogen and oxygen. By bypassing the fuel to the exhaust gas, hydrogen can be effectively used for, for example, fuel reforming, and oxygen can be effectively used, for example, for turbo congressor sounding, and the fuel cell output can be controlled in response to load demands of 1g. equipment could be provided

[Brief explanation of the drawings] Figure 1 is a diagram for explaining the power generation principle of a fuel cell. 1
Figure F82 is a block diagram showing an embodiment of the hydrogen and oxygen device according to the present invention.
...Anode 16.17...Pressure detector 3...
・Cathode 18...Fuel tank body 6.7...Flow rate control valve 8.9...Exhaust back pressure valve 10.11...Pressure A valve 12.18 ...Flow rate detector agent Patent attorney Kensuke Chika (and 1 other person) Figure 1 H Figure 2

Claims (1)

[Claims] In the natural battery Mitsuya equipment, the hydrogen and oxygen supply systems each have flow control valves that are controlled by the actual battery output, magnetic north setting output, and calculation output of the current flow of each fluid, and the differential pressure calculation equipment for hydrogen and oxygen. We installed a pressure control valve that operates at the same time, and connected this downstream pipe to the downstream of the exhaust check valve installed in each exhaust pipe of the fuel tank: +'! Fuel cell auxiliary/electrical control device with f characteristics,