KR102614081B1 - Energy self-sufficient power supply system - Google Patents

Abstract

An energy-independent power supply system and method that can save energy and improve efficiency by using various external devices are disclosed.
The present invention promotes energy savings and improved use efficiency by circulating resources such as hot water and oxygen generated as by-products of power conversion from various external devices, and can generate profits for system users by selling the remaining power.

Description

Energy self-sufficient power supply system {ENERGY SELF-SUFFICIENT POWER SUPPLY SYSTEM}

The present invention relates to an energy-independent power supply system and method that can save energy and improve efficiency by using various external devices.

Currently, most of the energy consumed worldwide is made up of fossil fuels such as oil and coal, and in the case of automobiles in particular, it is safe to say that only fossil fuels such as gasoline or diesel fuel are used.

However, fossil fuels such as oil have limited reserves, and various gases, dust, and post-combustion residues generated when burned to obtain energy are the main cause of environmental pollution, and global warming is a hot topic these days. It can be said to be the main culprit.

As the global warming phenomenon becomes increasingly serious, efforts are being made to establish and implement eco-friendly green policies around the world, and as part of this, in the automobile sector, carbon-free electricity is used instead of fossil fuels such as gasoline and diesel. We are accelerating the development of cars that use energy.

However, in the case of electric vehicles, they must be recharged after the electric energy stored in the rechargeable battery (battery) has been used up. Currently, the infrastructure for charging is very insufficient and charging takes a long time.

In addition, along with electric vehicles, the development of hydrogen vehicles is ongoing, and like electric vehicles, there is a shortcoming in the lack of infrastructure for charging.

Previously, Republic of Korea Patent Publication No. 10-2020-0039886 (published on April 17, 2020) discloses a smart farm operation system using hydrogen fuel cells, but the fuel cell is simply used as a resource to maintain an appropriate indoor environment for smart farm operation. Although the system is being used, there is no disclosure of a method to improve or overcome the above-mentioned shortcomings.

Republic of Korea Patent Publication No. 10-2020-0039886 (published on April 17, 2020)

Therefore, the first purpose of the present invention to solve these problems is to save energy and improve efficiency by circulating resources such as hot water and oxygen generated as by-products of power conversion from various external devices, and to sell the remaining power. It provides an energy-independent power supply system that can generate profits for system users and reduce the cost of building a system for power production by building the system in areas where power supply is difficult.

The second purpose of the present invention is to save energy and improve use efficiency by circulating resources such as hot water and oxygen generated as by-products of power conversion from various external devices, and to generate profit for system users by selling the remaining power. By building the system in areas where power supply is difficult, it provides an energy-independent power supply method that can reduce the cost of building a system for power production.

In order to achieve the first object, the present invention includes a hydrogen storage unit that receives hydrogen from the outside and stores it, a hydrogen storage unit that receives hydrogen from the hydrogen storage unit, and uses the supplied hydrogen to supply hydrogen to a hydrogen electric vehicle. A charging unit, a fuel cell stack that receives hydrogen from the hydrogen storage unit and oxygen from the outside to generate hot water and DC low voltage, a solar panel that supplies DC low voltage, and at least one of the fuel cell stack and the solar panel. It includes a converter unit that converts the DC low voltage supplied from one source into a DC high voltage, and a water electrolysis unit that receives the DC voltage from the converter unit and generates hydrogen and oxygen through a water electrolysis reaction, and the fuel cell stack is configured to generate hydrogen and oxygen through a water electrolysis reaction. Hot water is supplied to at least one of the light panel and the water electrolysis unit, and the solar panel includes a light collection panel that generates DC low voltage using sunlight, a temperature detection module that detects the temperature of the light collection panel, and the light collection panel. An efficiency detection module that detects the production efficiency of concentrating sunlight to generate DC low voltage, a water storage module that stores hot water supplied from the fuel cell stack and fresh water from the water electrolysis unit, and a light collection panel of the temperature detection module. A panel cooling module that lowers the temperature of the light collection panel using water stored in the water storage module when the detected temperature is higher than the standard temperature, and a DC low voltage generation efficiency detection result of the efficiency detection module, when the DC low voltage generation efficiency is below the standard efficiency. , providing an energy-independent power supply system including a panel cleaning module that cleans the light collection panel using water stored in the water storage module in a state that can be used for panel cleaning.

When set to the charging mode, the converter unit can receive DC voltage from the DC bus to charge the battery, and when set to the discharging mode, it can supply DC high voltage to the DC bus.

The water electrolysis unit may supply the generated hydrogen to the hydrogen storage unit, and the generated oxygen may be supplied to the fuel cell stack.
In addition, in an embodiment of the present invention, the water electrolysis unit includes a primary desalination treatment module that purifies water supplied from outside to make desalinated water or lowers the temperature of hot water supplied from the fuel cell stack to make room temperature water, A micro filter filters the room temperature water produced by the primary desalination treatment module, and the filtered room temperature water supplied through the micro filter causes a water electrolysis reaction to generate hydrogen and oxygen, and supplies the generated hydrogen to the hydrogen storage unit. and may include a water electrolysis treatment module that supplies the generated oxygen to the fuel cell stack.
In addition, in the above embodiment, the primary desalination treatment module desalinates water supplied from the outside using reverse osmosis to separate desalinated water, and the water electrolysis unit re-desalinates the desalinated water separated by the first desalination treatment module. It may further include a secondary desalination treatment module for obtaining concentrated water and a salt separation module for separating calcium salt crystals and salt from the concentrated water of the secondary desalination treatment module.

In order to achieve the second object, the present invention includes the steps of supplying hydrogen from a hydrogen storage unit to a hydrogen charging unit, supplying hydrogen to a hydrogen electric vehicle using hydrogen supplied from the hydrogen storage unit by the hydrogen charging unit, and providing a fuel cell. A step of the stack receiving hydrogen from the hydrogen storage unit, a step of receiving oxygen from the outside of the fuel cell stack, a step of the fuel cell stack generating hot water and DC low voltage using the hydrogen and oxygen, and a converter unit producing hot water and DC low voltage using the hydrogen and oxygen. An energy-independent power supply method comprising converting DC low voltage to DC high voltage is provided.

The step of converting the DC low voltage into a DC high voltage by the converter unit is when the converter unit is set to a charging mode, the step of charging the battery by receiving a DC voltage from the DC bus by the converter unit, and when the converter unit is set to a discharge mode, the step of charging the battery. The converter unit may include supplying a DC high voltage to the DC bus.

The converter converting the DC low voltage into DC high voltage includes the water electrolysis unit receiving a DC voltage from the converter unit, and the water electrolysis unit generating hydrogen and oxygen through a water electrolysis reaction using the DC voltage. It may include supplying hydrogen generated by the water electrolysis unit to the hydrogen storage unit and supplying oxygen generated by the water electrolysis unit to the fuel cell stack.

According to the energy self-sufficient power supply system and method described above, resources such as hot water and oxygen generated as by-products of power conversion from various external devices are circulated to save energy and improve use efficiency, and sell the remaining power to the system. It can generate profits for users, and by building the system in areas where power supply is difficult, it has the effect of reducing the cost of building a system for power production.

Figure 1 is a diagram showing the schematic configuration of an energy self-sufficient power supply system according to an embodiment of the present invention.
Figure 2 is a diagram showing the schematic configuration of a converter unit, which is one component of the present invention.
Figure 3 is a diagram showing the schematic configuration of a solar panel, which is one component of the present invention.
Figure 4 is a diagram showing the schematic configuration of a water electrolysis unit, which is one component of the present invention.
Figure 5 is a diagram showing a schematic flow of an energy self-sufficient power supply method according to an embodiment of the present invention.

Terms or words used in this specification and claims are not to be construed limited to their ordinary or dictionary meanings, and the inventor may appropriately define the concept of the term in order to explain the user's invention in the best way. It must be interpreted based on the meaning and concept consistent with the technical idea of the present invention.

Throughout the specification, when a part is said to “include” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary. In addition, “…” stated in the specification. wealth", "… energy", "… However, terms such as “module”, “device”, etc. refer to a unit that processes at least one function or operation, which may be implemented through a combination of hardware and/or software.

Terms used in the embodiments of the present invention will be briefly described, and the embodiments will be described in detail.

The terms used in the embodiments of the present invention are general terms that are currently widely used as much as possible while considering the function in the present invention, but this may vary depending on the intention or precedent of a person working in the art, the emergence of new technology, etc. . In addition, in certain cases, there are terms arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the relevant embodiments. Therefore, the terms used in the present embodiments should not be defined simply as the names of the terms, but should be defined based on the meaning of the term and the overall content of the present embodiments.

In embodiments of the present invention, terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention. The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

Additionally, in embodiments of the present invention, singular expressions include plural expressions unless the context clearly dictates otherwise.

In addition, in the embodiments of the present invention, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but It should be understood that it does not exclude in advance the presence or addition of other features, numbers, steps, operations, components, parts, or combinations thereof.

Additionally, in an embodiment of the present invention, a 'module' or 'unit' performs at least one function or operation and may be implemented as hardware or software, or as a combination of hardware and software. Additionally, a plurality of 'modules' or a plurality of 'units' may be integrated into at least one module and implemented with at least one processor, except for 'modules' or 'units' that need to be implemented with specific hardware.

Additionally, in an embodiment of the present invention, when a part is said to be "connected" to another part, this is not only the case when it is "directly connected", but also when it is "electrically connected" with another element in between. Also includes cases where there are.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

FIG. 1 is a diagram showing a schematic configuration of an energy self-sufficient power supply system as an embodiment of the present invention, FIG. 2 is a diagram showing a schematic configuration of a converter unit as an embodiment of the present invention, and FIG. 3 is a diagram showing a schematic configuration of an energy self-sufficient power supply system as an embodiment of the present invention. This is a diagram showing the schematic configuration of a solar panel, and Figure 4 is a diagram showing the schematic configuration of a water electrolysis unit, which is a component of the present invention.

Referring to Figures 1 to 4, the energy self-sufficient power supply system includes a hydrogen storage unit 100, a hydrogen charging unit 200, a fuel cell stack 300, a converter unit 400, a DC bus 500, and a battery 600. ), a water electrolysis unit 700, an AC grid 800, and a solar panel 900, and the converter unit 400 includes a first DC/DC converter 410, a second DC/DC converter 420, The 3rd DC/DC converter 430, the 4th DC/DC converter 440, the 5th DC/DC converter 450, the 1st AC/DC converter 460, the 2nd AC/DC converter 470, and the DC/AC inverter ( 480) may be included.

And the solar panel 900 includes a light collection panel 910, a temperature detection module 920, an efficiency detection module 930, a water storage module 940, a panel cooling module 950, and a panel cleaning module 960. It can be done, and the water electrolysis unit 700 includes a primary desalination treatment module 710, a secondary desalination treatment module 720, a salt separation module 730, a micro filter 740, and a water electrolysis treatment module 750. can do.

More specifically, the hydrogen storage unit 100 can receive hydrogen from the outside and store the supplied hydrogen.

Here, the hydrogen storage unit 100 can receive hydrogen directly from the outside, and when receiving LPG, LNG, bio gas, etc. from the outside, hydrogen can be extracted from LPG, LNG, bio gas, etc. through a reformer. It can store hydrogen extracted from LPG, LNG, bio gas, etc.

In addition, the hydrogen charging unit 200 can receive hydrogen from the hydrogen storage unit 100, and can supply hydrogen to a fuel cell electric vehicle (FCEV) using the supplied hydrogen.

Additionally, the fuel cell stack 300 can receive hydrogen from the hydrogen storage unit 100 and oxygen from the outside, and can generate hot water and DC low voltage using the supplied hydrogen and oxygen.

The hot water generated by the fuel cell stack 300 can be used by users as heating.

Additionally, the fuel cell stack 300 may supply the generated hot water to at least one of the solar panel 900 and the water electrolysis unit 700.

And the converter unit 400 can convert DC low voltage into DC high voltage.

More specifically, the first DC/DC converter 410 can convert DC low voltage to DC high voltage and may be configured as a unidirectional DC/DC boost converter.

Additionally, when the converter unit 400 is set to the charging mode, DC voltage can be supplied from the DC bus 500, and the battery 600 can be charged with the supplied DC voltage.

More specifically, when the second DC/DC converter 420 is set to the charging mode, the second DC/DC converter 420 can receive DC voltage from the DC bus 500, and the battery 600 can use the supplied DC voltage. ) can be charged.

And when the converter unit 400 is set to the discharge mode, DC high voltage can be supplied to the DC bus 500.

More specifically, when the second DC/DC converter 420 is set to the discharge mode, the second DC/DC converter 420 may supply a DC high voltage to the DC bus 500.

In addition, the water electrolysis unit 700 can receive DC voltage from the converter unit 400, can cause a water electrolysis reaction using the supplied DC voltage, and can generate hydrogen and oxygen through the water electrolysis reaction. .

More specifically, the third DC/DC converter 430 can receive DC voltage from the DC bus 500, and the water electrolysis unit 700 can receive DC voltage from the third DC/DC converter 430.

And the third DC/DC converter 430 may be configured as a unidirectional step-up/download converter.

Here, the water electrolysis unit 700 may receive water from the outside, and the water supplied from the outside may be desalinated water.

In addition, the water electrolysis unit 700 can receive tap water from the outside, and when supplied with tap water, the water electrolysis unit 700 can purify the tap water through the primary desalination treatment module 710 to make it into desalinated water, The water electrolysis unit 700 can cause a water electrolysis reaction using purified demineralized water.

In addition, the primary desalination treatment module 710 can lower the temperature of the hot water supplied from the fuel cell stack 300 to make it room temperature water, and the micro filter 740 can use the room temperature water generated by the primary desalination treatment module 710. The water can be filtered and supplied to the water electrolysis treatment module 750.

More specifically, the primary desalination treatment module 710 may include a cooling module (not shown), which lowers the temperature of the hot water supplied from the fuel cell stack 300 to make it room temperature water. You can.

Here, the water electrolysis treatment module 750 can cause a water electrolysis reaction using purified demineralized water, and can cause a water electrolysis reaction using filtered room temperature water supplied from the micro filter 740.

In addition, the primary desalination treatment module 710 can receive deep ocean water from the outside, and separate the desalinated water by desalting the supplied deep ocean water using reverse osmosis.

In addition, the secondary desalination module 720 can obtain concentrated water obtained by re-desalting the desalinated water separated by the primary desalination module 710, and the salt separation module 730 can obtain calcium salt crystals and salt from the concentrated water. can be separated.

The separated salt can generate business income by selling it externally.

And the salt separation module 730 can obtain calcium salt by removing salt and calcium carbonate from the separated calcium salt crystals.

Additionally, the micro filter 740 can filter calcium salts by mixing them with general purified water, and obtain fresh water by removing suspended solids in the filtered water.

The micro filter 740 can supply the obtained fresh water to the solar panel.

Additionally, the water electrolysis unit 700 can supply the generated hydrogen to the hydrogen storage unit 100 and supply the generated oxygen to the fuel cell stack 300.

More specifically, the water electrolysis treatment module 750 can cause a water electrolysis reaction using purified demineralized water, supply the generated hydrogen to the hydrogen storage unit 100, and use the generated oxygen in a fuel cell stack ( 300) can be supplied.

Additionally, the fuel cell stack 300 can generate hot water and DC low voltage using hydrogen supplied from the hydrogen storage unit 100 and oxygen generated by the water electrolysis unit 700.

And the light collection panel 910 can generate DC low voltage using sunlight.

Additionally, the temperature sensing module 920 can detect the temperature of the light collection panel 910.

Additionally, the efficiency detection module 930 can detect the generation efficiency with which the light collection panel 910 collects sunlight and generates a DC low voltage.

In addition, the water storage module 940 can store hot water that can be supplied from the fuel cell stack 300 and fresh water that can be supplied from the micro filter 740, and can adjust the temperature of the stored hot water or fresh water through panel cooling or panel cooling. It can be brought to a condition (temperature) that can be used for cleaning.

In addition, when the panel cooling module 950 detects an abnormality (the temperature of the light collection panel 910 is higher than the reference temperature) as a result of the temperature detection of the light collection panel 910 by the temperature detection module 920, the water storage module 940 stores the The temperature of the light collection panel 910 can be lowered by using water that can be used for panel cooling.

In addition, the panel cleaning module 960 cleans the panel stored in the water storage module 940 when an abnormality occurs (DC low voltage generation efficiency is below the standard efficiency) as a result of detecting the DC low voltage generation efficiency of the efficiency detection module 930. The light collection panel 910 can be washed using water in a state that can be used.

And the converter unit 400 can receive DC low voltage from the solar panel 900, convert the DC low voltage supplied from the solar panel 900 into DC high voltage, and convert the converted DC high voltage into DC bus ( 500) can be supplied.

More specifically, the fourth DC/DC converter 440 can receive DC low voltage from the solar panel 900, convert the DC low voltage supplied from the solar panel 900 into DC high voltage, and convert the converted DC High voltage can be supplied to the DC bus 500.

Here, the fourth DC/DC converter 440 may be configured as a unidirectional DC/DC step-up converter.

And the first AC/DC converter 460 can receive AC voltage from the AC grid 800, convert the supplied AC voltage into DC voltage, and supply the converted DC voltage to the DC bus 500. there is.

Additionally, the DC/AC inverter 480 can receive DC low voltage from the solar panel 900 and can receive DC high voltage from the fourth DC/DC converter 440.

Additionally, the DC/AC inverter 480 can convert at least one of DC low voltage and DC high voltage into AC voltage, and supply the converted AC voltage to the AC grid 800.

In addition, when the 5th DC/DC converter 450 is set to the charging mode, the 5th DC/DC converter 450 can receive DC voltage from the DC bus 500 and use the supplied DC voltage to power the electric vehicle battery. can be charged.

And when the 5th DC/DC converter 450 is set to the discharge mode, the 5th DC/DC converter 450 can receive DC voltage from the electric vehicle battery, and convert the DC voltage supplied from the electric vehicle battery to the DC bus 500. can be supplied to.

Here, the fifth DC/DC converter 450 can convert the DC voltage supplied from the electric vehicle battery into DC high voltage, and supply the converted DC high voltage to the DC bus 500.

In addition, when the second AC/DC converter 470 is set to charging mode, the second AC/DC converter 470 can receive AC voltage from the AC grid 800 and convert the supplied AC voltage into DC voltage. It is possible to charge an electric vehicle battery using the converted DC voltage.

And when the second AC/DC converter 470 is set to the discharge mode, the second AC/DC converter 470 can receive DC voltage from the electric vehicle battery and convert the supplied DC voltage into AC voltage, The converted AC voltage can be supplied to the AC grid 800.

In addition, the AC grid 800 can supply AC voltage that can be supplied from the DC/AC inverter 480 or the second AC/DC converter 470 to the Korea Electric Power Corporation, and by supplying the AC voltage to the Korea Electric Power Corporation, Separate profits can also be generated.

Figure 5 is a diagram showing a schematic flow of an energy self-sufficient power supply method according to an embodiment of the present invention.

Referring to FIG. 5, the hydrogen storage unit 100 can supply hydrogen to the hydrogen charging unit 200 (S530).

And the hydrogen charging unit 200 can supply hydrogen to the hydrogen electric vehicle using the hydrogen supplied from the hydrogen storage unit 100 (S531).

Additionally, the fuel cell stack 300 can receive hydrogen from the hydrogen storage unit 100 (S532).

And the fuel cell stack 300 can receive oxygen from the outside (S533).

Additionally, the fuel cell stack 300 can generate hot water and DC low voltage using hydrogen and oxygen (S534).

And the converter unit 400 can convert DC low voltage into DC high voltage (S535).

More specifically, when the converter unit 400 is set to the charging mode, the converter unit 400 can receive DC voltage from the DC bus 500 and charge the battery using the supplied DC voltage.

And when the converter unit 400 is set to the discharge mode, the converter unit 400 can supply DC high voltage to the DC bus 500.

Additionally, the water electrolysis unit 700 may receive DC voltage from the converter unit 400.

And the water electrolysis unit 700 can generate hydrogen and oxygen through a water electrolysis reaction using DC voltage.

Additionally, the water electrolysis unit 700 may supply the generated hydrogen to the hydrogen storage unit 100.

And the water electrolysis unit 700 can supply the generated oxygen to the fuel cell stack 300.

As described above, the configuration and operation of the energy self-sufficient power supply system and method according to the embodiments of the present invention can be achieved. Meanwhile, in the description of the present invention, specific embodiments have been described, but various modifications can be made within the scope of the present invention. It can be implemented without deviation.

Although the present invention has been described above with limited examples and drawings, the present invention is not limited thereto, and of course, various modifications and variations can be made by those skilled in the art to which the present invention pertains.

Those skilled in the art related to this embodiment will understand that the above-described base material can be implemented in a modified form without departing from the essential characteristics. Therefore, disclosure methods should be considered from an explanatory rather than a restrictive perspective. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the equivalent scope should be construed as being included in the present invention.

100: hydrogen storage unit 200: hydrogen charging unit
300: Fuel cell stack 400: Converter unit
410: 1st DC/DC converter 420: 2nd DC/DC converter
430: 3rd DC/DC converter 440: 4th DC/DC converter
450: 5th DC/DC converter 460: 1st AC/DC converter
470: Second AC/DC converter 480: DC/AC inverter
500: DC Bus 600: Battery
700: Water dissection 710: Primary desalination treatment module
720: Secondary desalination treatment module 730: Salt separation module
740: Micro filter 750: Water electrolysis treatment module
800: AC grid 900: Solar panel
910: light concentrating panel 920: temperature sensing module
930: Efficiency detection module 940: Water storage module
950: Panel cooling module 960: Panel cleaning module

Claims (8)

A hydrogen storage unit that receives and stores hydrogen from the outside;
A hydrogen charging unit that receives hydrogen from the hydrogen storage unit and supplies hydrogen to a hydrogen electric vehicle using the supplied hydrogen;
a fuel cell stack that receives hydrogen from the hydrogen storage unit and oxygen from the outside to generate hot water and DC low voltage;
Solar panels supplying DC low voltage; and
a converter unit that converts the DC low voltage supplied from at least one of the fuel cell stack and the solar panel into DC high voltage;
It includes a water electrolysis unit that receives DC voltage from the converter unit and generates hydrogen and oxygen through a water electrolysis reaction,
The fuel cell stack is
Supplying hot water to at least one of the solar panel and the water heater,
The solar panel is
A light-concentrating panel that generates DC low voltage using sunlight;
a temperature sensing module that detects the temperature of the light collection panel;
an efficiency detection module that detects the generation efficiency with which the light collection panel collects sunlight to generate DC low voltage;
a water storage module that stores hot water supplied from the fuel cell stack and fresh water from the water electrolysis unit;
a panel cooling module that lowers the temperature of the light collection panel using water stored in the water storage module when the temperature detected by the temperature detection module of the light collection panel is higher than a reference temperature;
As a result of detecting the DC low-voltage generation efficiency of the efficiency detection module, if the DC low-voltage generation efficiency is below the standard efficiency, panel cleaning is performed by washing the light-collecting panel using water stored in the water storage module in a state that can be used for panel cleaning. module; Including,
The above water dissection is
Primary desalination: making desalinated water by purifying water supplied from outside, separating desalinated water by desalting water supplied from outside using reverse osmosis, or lowering the temperature of hot water supplied from the fuel cell stack to make room temperature water. processing module;
A micro filter that filters room temperature water produced by the primary desalination treatment module;
A water electrolysis treatment module that generates hydrogen and oxygen by causing a water electrolysis reaction with filtered room temperature water supplied through the micro filter, supplies the generated hydrogen to the hydrogen storage unit, and supplies the generated oxygen to the fuel cell stack. ;
a secondary desalination treatment module that obtains concentrated water by re-desalting the desalination water separated by the first desalination treatment module; and
a salt separation module that separates calcium salt crystals and salt from the concentrated water of the secondary desalination treatment module; An energy self-sufficient power supply system comprising: According to paragraph 1,
The converter part
An energy-independent power supply system that, when set to charging mode, receives DC voltage from the DC bus to charge the battery, and when set to discharge mode, supplies DC high voltage to the DC bus. The method of claim 1, wherein the water electrolysis is
An energy self-sufficient power supply system in which the generated hydrogen is supplied to the hydrogen storage unit, and the generated oxygen is supplied to the fuel cell stack.
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