WO2023048354A1

WO2023048354A1 - System and method for charging redox flow battery for charging electric automobiles by using eco-friendly power generation or late-night idle power

Info

Publication number: WO2023048354A1
Application number: PCT/KR2022/008013
Authority: WO
Inventors: 김장욱; 정용신
Original assignee: 남도금형(주)
Priority date: 2021-09-24
Filing date: 2022-06-07
Publication date: 2023-03-30
Also published as: KR20230044089A

Abstract

The present invention pertains to a system and method for charging a redox flow battery for charging electric automobiles by using eco-friendly power generation or late-night idle power, the system comprising: a power distribution board through which a commercial alternating current power is led into a building from a power system; an eco-friendly power generation module connected to the power distribution board; a bidirectional power conversion module connected to the power distribution board; a battery unit which is installed in a predetermined building and comprises a redox flow battery that is charged by receiving a direct current power output from the eco-friendly power generation module or the power conversion module; a battery management module that monitors state information of the redox flow battery; and an energy management module that receives state information of the battery unit, diagnoses a state of the battery unit on the basis of the received state information, and controls each of operations of the power conversion module and the battery management module. In an embodiment of the present invention, the redox flow battery, which is convenient to install and maintain, is charged by using sunlight and late-night electricity and may be used for charging electric automobiles or for various power necessary in small buildings or homes.

Description

Redox flow battery charging system and method for charging electric vehicles utilizing eco-friendly power generation or late-night idle power

The present invention relates to a redox flow battery charging system and method for charging an electric vehicle using eco-friendly power generation or late-night idle power, and more particularly, a redox flow battery that is easy to install and maintain for eco-friendly power generation and late-night electricity. It relates to a redox flow battery charging system and method for charging an electric vehicle that utilizes eco-friendly power generation or late-night idle power to be used for charging electric vehicles or for various electric power required in small buildings or homes.

The information described below merely provides background information related to the present invention and does not constitute prior art.

In general, as the environmental pollution of the earth has reached a serious level due to the excessive use of fossil fuels, the increase in automobiles and population, and the expansion of industrial facilities, the importance of using alternative energy has been highlighted.

In particular, most of the power plants that produce automobiles and electricity, which are means of transportation that determine the quality of human life, generate power based on fossil fuels to operate vehicles or produce electricity.

Therefore, many studies have been conducted on the use of eco-friendly new and renewable energy as a means to reduce the use of fossil fuels and replace fossil fuels used in automobiles and power plants. is currently doing.

Unlike general cars, electric vehicles are configured to drive the power system using electricity stored in batteries, so they are equipped with a battery that can supply electricity necessary for vehicle operation, and the charge of the battery mounted on the vehicle is the driving distance of the vehicle. will influence

However, due to the technical limitations of the battery and the limitation of the battery loading capacity of the vehicle, electric cars have a shorter driving range than general cars, so there is an inconvenience in that the consumed electricity of the battery must be recharged from time to time.

In addition, since it takes a lot of time to charge the battery of an electric vehicle with electricity compared to conventional automobiles, technology for charging electricity is very important.

Currently, electric vehicle charging stations necessary for driving electric vehicles are charged using general commercial power, so the use of commercial power increases as the number of electric vehicles increases. As the operation of thermal power plants increases because of the need to produce, a contradiction arises in that emissions that pollute the atmospheric environment rather increase, and electric power used for electric vehicles charging in real time increases the power used for industrial or household purposes during peak power demand times. There is a problem that a disruption in power supply may occur due to a shortage.

Therefore, with the increase in electric vehicles, it is essential to install an electric vehicle charging station so that drivers who drive electric vehicles can easily charge anywhere. However, since the use of commercial power increases with the increase in the number of charging stations for electric vehicles, it is necessary to efficiently use the overall commercial power.

And, recognizing the need for a means capable of safely charging electric vehicles while reducing the use of commercial power when a peak load of commercial power occurs, securing electric vehicle charging power using renewable energy is proposed as an alternative.

On the other hand, Tesla has released 'Power Wall' with lithium-ion technology, but lithium-ion batteries have concerns of fire and explosion no matter how well they are managed.

Therefore, in any case in the future, it is desirable to replace the safe redox flow battery with the lithium ion battery of 'Powerwall'.

On the other hand, renewable energy such as solar energy or wind energy is in the limelight as a method for suppressing greenhouse gas emissions, which is a major cause of global warming, and many studies are being conducted to commercialize and spread these. However, such renewable energy is greatly influenced by location environment and natural conditions. Moreover, renewable energy has a disadvantage in that energy cannot be continuously and evenly supplied because output fluctuations are severe.

Therefore, in order to even out the energy output, it is important to develop a storage device that can store energy when the output is high and use the stored energy when the output is low. There is a redox flow battery and the like.

Among them, lead-acid batteries are widely used commercially compared to other batteries, but have disadvantages such as low efficiency, maintenance costs due to periodic replacement, and problems in handling industrial waste generated during battery replacement.

And, in the case of NaS battery, it has the advantage of high energy efficiency, but has the disadvantage of operating at a high temperature of 300 ° C. or more.

On the other hand, redox flow batteries have low maintenance costs, can be operated at room temperature, and have characteristics such that capacity and output can be designed independently, so a lot of research has recently been conducted as a mass storage device.

The problem to be solved by the present invention is to solve the above-mentioned problems, and the redox flow battery, which is easy to install and maintain, is charged using eco-friendly power generation or late-night electricity, and various electric power required for electric vehicle charging or small buildings or homes. To provide a redox flow battery charging system and method for charging an electric vehicle that utilizes eco-friendly power generation or idle power at night.

In addition, the problem to be solved by the present invention is to solve the above-mentioned problems, calculating the average amount of electricity used per day for electric vehicle charging or various power required in small buildings or homes, and redox flow based on the daily charge amount. An object of the present invention is to provide a redox flow battery charging system and method for charging an electric vehicle using eco-friendly power generation or late-night idle power that efficiently controls battery charging.

A redox flow battery charging method for charging an electric vehicle using eco-friendly power generation or late-night idle power according to the features of the present invention to solve these problems is,

a distribution board through which commercial AC power is introduced into the building from the power system; An eco-friendly power generation module connected to the distribution board; a bidirectional power conversion module connected to the distribution board connected to the distribution board; A redox flow battery installed in a building; As a redox flow battery charging method of a redox flow battery charging system for charging an electric vehicle having a battery management module for monitoring state information of the redox flow battery,

determining, by an energy management module, whether it is a late-night time zone to which a late-night electricity rate is applied;

charging the redox flow battery with electricity generated from the eco-friendly power generation module in non-night time zones;

and charging the redox flow battery using late-night electricity in the late-night time zone.

In the late-night time zone, the step of charging the redox flow battery using late-night electricity,

If it is a late-night time zone, the energy management module confirming the daily average usage of the building including electric vehicle charging;

Determining, by the energy management module, whether the daily average usage of the building is 80% or more of the total capacity of the redox flow battery;

controlling the target state of charge of the battery unit to be fully charged when the daily average usage of the building is 80% or more of the charge of the redox flow battery;

When the average daily usage of the small building is less than 80% of the charge of the redox flow battery, controlling the target state of charge of the battery unit to be charged by adding 10% to the average daily usage.

The method,

determining whether the next day's weather information is sunny by the energy management module;

When the weather information for the next day is clear, the energy management module further comprising changing a value obtained by subtracting 50% of the daily solar charge amount charged using the sunlight from the target charge amount of the battery unit to the target charge amount do.

The redox flow battery charging system for charging an electric vehicle utilizing eco-friendly power generation or late-night idle power according to the features of the present invention to solve these problems is,

A distribution board through which commercial AC power is introduced into the building from the power system;

An eco-friendly power generation module connected to the distribution board;

a bidirectional power conversion module connected to the distribution board connected to the distribution board;

A battery unit including a redox flow battery installed in a predetermined building and charged by receiving DC power output from the eco-friendly power generation module or power conversion module;

a battery management module for monitoring state information of the redox flow battery;

and an energy management module for receiving state information of the battery unit, diagnosing a state of the battery unit based on the received state information, and controlling operations of the power conversion module and the battery management module, respectively.

The energy management module charges the redox flow battery with electricity generated by the eco-friendly power generation module during non-night time.

The energy management module charges the redox flow battery using late-night electricity during the late-night time zone.

The redox flow battery,

A first electrolytic bath and a second electrolytic bath in which a first electrolyte and a second electrolyte are stored, respectively;

A stack unit connected to the power conversion module and including at least one or more battery cells in which charging and discharging are performed by a redox reaction between a first electrolyte and a second electrolyte;

A first circulation pump and a second circulation pump respectively supplying a first electrolyte solution and a second electrolyte solution to the stack unit are included.

In an embodiment of the present invention, the redox flow battery, which is easy to install and maintain, is charged using eco-friendly power generation or late-night electricity, and used for electric vehicle charging or various power required in small buildings or homes. It is possible to provide a redox flow battery charging system and method for charging an electric vehicle using idle power.

In addition, in an embodiment of the present invention, the average amount of electricity used per day for electric vehicle charging or various power required in a small building or home is calculated, and the charging of the redox flow battery is efficiently controlled based on the daily charge amount. It is possible to provide a redox flow battery charging system and method for charging an electric vehicle that utilizes power generation or idle power at night.

1 is a configuration diagram of a redox flow battery charging system for charging an electric vehicle utilizing sunlight or idle power at night according to an embodiment of the present invention.

2 and 3 are views showing the configuration of a redox flow battery used in a redox flow battery charging system for charging an electric vehicle utilizing sunlight or idle power at night according to an embodiment of the present invention.

4 is a diagram illustrating a redox flow battery charging method for charging an electric vehicle using sunlight or idle power at night according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

In the following, eco-friendly power generation may be solar power, wind power, or other environmentally friendly power generation technologies.

1 is a block diagram of a redox flow battery charging system for charging an electric vehicle utilizing sunlight or idle power at night according to an embodiment of the present invention, and FIGS. 2 and 3 are solar light according to an embodiment of the present invention. Or, it is a diagram showing the configuration of a redox flow battery used in a redox flow battery charging system for charging an electric vehicle that utilizes idle power at night.

1 to 3, the redox flow battery charging system for charging an electric vehicle utilizing eco-friendly power generation or late-night idle power according to an embodiment of the present invention,

A distribution board 10, a power conversion module 20, a battery unit 30, a battery management module 50, and an energy management module 60 are provided.

For the eco-friendly power generation of the present invention, well-known eco-friendly power generation may be applied, and sunlight may be applied as a specific example. Hereinafter, eco-friendly power generation is exemplified by solar light, but the eco-friendly power generation of the present invention is not limited to photovoltaic power generation.

The distribution panel 10 is a part where commercial AC power is introduced into the home from the power system 7, and is connected to a distribution box, a meter 11 installed in the distribution box, a main circuit breaker connected to the meter 11, and a main circuit breaker. It is composed of a main bus bar, a plurality of sub-bus bars connected to the main bus bar, and a plurality of sub-wire breakers connected to the sub-bus bar on one side and connected to the charger 70 and the load L on the other side. .

In addition, in the embodiment of the present invention, the size of the redox battery is larger than that of the existing battery, and may occupy a lot of space, but it is also advantageous for long life utilization in connection with maintenance work of the house, such as water pipe management, so in the case of an apartment, a balcony In the case of a house on one side, it is appropriate to install it adjacent to the garage. Since this embodiment of the present invention has no risk of fire or explosion compared to existing lithium ion-based batteries that have a risk of fire or explosion, and is safe in any case, safe use is guaranteed when installed in a house.

In addition, conventional lithium-ion batteries can only be used for about 2 years (up to 5 years), but if the applicant's technology (nitrogen gas bubble cleaning drain of membrane) applied to the embodiment of the present invention is used, it can be used for more than 20 years can

The solar module 80 is connected to the distribution board 20 and generates and outputs power using sunlight. Since these solar modules are well known in the art, a detailed description thereof will be omitted.

The power conversion module 20 is connected to the sub-circuit breaker of the distribution panel 10 and converts AC power supplied from commercial power into DC power and outputs it to the battery unit 30 or direct current supplied from the solar module 8 Power is output to the battery unit (30).

In addition, the power conversion module 20 converts the DC power supplied from the battery unit 30 into AC power and outputs it to the load L or the commercial power system. The power conversion module 20 may include an AC/DC converter, a DC/AC inverter, and a DC/DC converter.

The battery unit 30 includes a redox flow battery 40, is installed in a certain space within a building, and is charged by receiving DC power output from the power conversion module 20, or converts the charged DC power into power. discharged into the module 20. The battery unit 30 may include a vanadium redox flow battery 40 in which charging and discharging are performed by exchanging charges while two electrolytes containing vanadium ions flow between membranes.

The redox flow battery 40 includes a first electrolysis tank 41 and a second electrolysis tank 42, a first supply line and a second supply line, a first circulation pump 43 and a second circulation pump 44 , a stack unit 45, and a first recovery line and a second recovery line.

The first electrolytic bath 41 and the second electrolytic bath 42 are preferably manufactured in a much smaller size than the electrolyte tank of the redox flow battery 40 used for industrial purposes.

For example, the first electrolytic tank 41 and the second electrolytic tank 42 are preferably installed and moved freely by manufacturing them in a size corresponding to that of a hot water tank of an electric hot water facility using late-night power in a building.

The first supply line has one end connected to the first electrolytic bath 41 and the other end connected to the stack unit 45 to supply the first electrolyte stored in the first electrolytic bath 41 to the stack unit 45 . A first circulation pump 43 for pumping and supplying the first electrolyte to the stack unit 45 is installed in the first supply line.

The second supply line has one end connected to the second electrolytic bath 42 and the other end connected to the stack unit 45 to supply the second electrolyte stored in the second electrolytic bath 42 to the stack unit 45 .

A second circulation pump 44 for pumping and supplying the second electrolyte to the stack unit 45 is installed in the second supply line.

The stack unit 45 is connected to the power conversion module 20 and includes at least one or more battery cells in which charging and discharging are performed by a redox reaction between the first electrolyte and the second electrolyte.

The stack unit 45 includes an ion exchange membrane 45A, a first electrode plate 46, a second electrode plate 47, and a first electrode plate 46 disposed on opposite sides of the ion exchange membrane 45A, respectively. A first separator and a second separator disposed outside the second electrode plate 47, respectively, and a flow path disposed outside the first separator and the second separator and through which the first electrolyte and the second electrolyte could flow The first and second euro frames are respectively formed, the first and second collector plates are disposed outside the first and second euro frames, and the first and second collector plates are disposed outside the first and second collector plates, respectively. The first end plate 48 and the second end plate 49 may be included.

Although not shown in the drawing, each of the first separator and the second separator may include a main layer, a first cover layer, a second cover layer, and a plurality of supports.

The main layer replaces the existing graphite bulk electrode plate, and is formed of carbon felt with internal voids, has a certain thickness, and is formed in a rectangular shape.

The first cover layer is bonded by heat compression or heat to one side of the opposite sides of the main layer, and is formed of a conductive resin.

The first cover layer may be formed of conductive polyethylene (PE). The second cover layer is formed of a thermoplastic resin by being compressed or bonded by heat to the other surface of the main layer on which the first cover layer is pressed or pressed, among opposite sides of the main layer. The second cover layer may be formed of thermoplastic polyethylene (PE).

The support is buried inside the main layer between the first cover layer and the second cover layer, and a plurality of supports are buried at positions spaced apart from each other by a predetermined interval.

Supports are arranged and buried in an Nx matrix pattern or zigzag pattern inside the main layer.

The support is made of polyethylene (PE) and may be formed in a polygonal column or column shape, but in this embodiment, a column shape was applied. In addition, a coating layer coated with polyether ether ketone (PEEK) is further provided on the surface of the support.

Polyether ether ketone (PEEK), which forms the coating layer formed on the surface of the support, has excellent electrical properties such as dielectric permittivity and volume resistivity at high temperatures, can be used without changing physical properties under high temperature and high pressure conditions, and can be used without general thermoplastic resin processing equipment. It is an easily processable, semi-crystalline resin that guarantees excellent stability in a wide range of inorganic and organic chemicals.

In addition, it has excellent lubricity under a wide range of conditions, excellent self-lubrication even in the absence of oil and grease supply, and excellent wear resistance. In addition, injection molding, extrusion molding, and powder coating are possible, and it is very advantageous for mass production as well as various small-volume products.

The support is fixed by heat-sealing, heat-compressing, or heat-sealing the coating layers at both ends in the longitudinal direction toward both sides in the thickness direction of the main layer and at both ends of the main layer by being drawn into the first cover layer and the second cover layer at a predetermined depth, respectively.

Alternatively, both ends of the support in the longitudinal direction may be fixed to the surfaces of the first cover layer and the second cover layer by thermal fusion, thermal compression, or thermal bonding.

On the other hand, a hollow part may be formed inside the support body along the longitudinal direction, and a core part may be formed by filling the inside of the hollow part with a filler made of PEEK constituting the coating layer described above. In this case, the support body is filled in the hollow part. Durability and strength can be further improved by the core part.

Such a stack unit 45 has a power withdrawal function by forming a connection portion capable of connecting a cable for power withdrawal to the separator plate, and the current collector can be omitted from the stack structure of the existing redox flow battery, and the cable A DLC-coated protective layer may be formed on the surface of the connecting portion to be connected to improve wear resistance and friction characteristics of the connecting portion.

In addition, by inserting and embedding a support for reinforcement inside the carbon felt of the separator, the resin sheet and the carbon felt are thermally compressed, and then the separator is deformed or the strength is weakened or the strength is weakened during cooling. It is easy to handle and has no deformation even during manufacturing due to its size.

In addition, the first and second separators withstand heat generated when the first and second cover layers are thermally compressed or thermally bonded to the main layer through a support having a PEEK coating layer resistant to heat, so that the main layer has a certain thickness. By reinforcing the main layer to have an advantage of manufacturing a separator having various thicknesses and areas along the length of the support. That is, separators having different thicknesses can be manufactured using supports of different lengths, and even if the main layer is formed of carbon felt, since the support is inserted and buried inside the main layer, the main layer is reinforced by the support and maintains its shape continuously. It can be maintained as, through which the separator can be manufactured in a large area.

The battery management module 50 is for monitoring state information of the battery unit 30 and ensuring safe operation and performance, and protects the battery unit 30 from overheating or overcharging by monitoring the voltage, current, temperature, etc. of the battery unit 30 .

The energy management module 60 is responsible for the overall control of the system, and in detail, receives state information of the battery unit 30, diagnoses the state of the battery unit 30 based on the received state information, and converts power. The operation of the module 20 and the battery management module 50 are respectively controlled.

The energy management module 60 may set the maximum charge amount and maximum discharge amount of the battery unit 30 , charge time zone and discharge time zone setting, and set the operation of the power conversion module 20 .

The energy management module 60 charges the redox flow battery 40 using commercial power in the late-night time zone when the late-night electricity rate is applied, and in the non-night time zone, the redox flow battery is generated by the solar module. charge with electricity

In addition, the energy management module 60 may control the redox flow battery 40 to be discharged in non-night time zones. If necessary, the energy management module 60 may control the redox flow battery 40 to be discharged even in the middle of the night. Here, the late-night time zone can be changed according to the season or policy, and may be from 23:00 pm to 9:00 am the next day.

In an embodiment of the present invention, the hot water tank of the electric hot water facility for late night power, which stores and uses idle power at night in the form of thermal energy in the hot water tank, is replaced with an electrolytic cell of a redox flow battery of a similar size to supply hot water in a small building or home, It can be used immediately for various power demand sources such as lighting, air conditioning, transportation, and disaster prevention.

In addition, in the embodiment of the present invention, the electrolytic cell of the redox flow battery system is manufactured in a size that can be easily moved and installed without using separate mechanical equipment, so that it can be installed and moved freely, and can be distributed at home without the risk of explosion or fire. ESS can be utilized and built.

In addition, in the embodiment of the present invention, it is relatively easy to increase output through a combination of existing stack units.

The operation of the redox flow battery charging system for charging an electric vehicle utilizing eco-friendly power generation or late-night idle power according to an embodiment of the present invention having such a configuration is as follows.

4 is a diagram illustrating a redox flow battery charging method for charging an electric vehicle using eco-friendly power generation or late-night idle power according to an embodiment of the present invention.

Referring to FIG. 4 , first, the energy management module 60 determines whether the current time is a late-night time zone to which late-night electricity rates apply (S400).

If it is a non-midnight time zone, the energy management module 60 charges the redox flow battery with electricity generated by the solar module 80 (S410). That is, the energy management module 60 controls the power conversion module 20 to charge the redox flow battery 40 of the battery unit 30 with electricity generated by the solar module 80 .

In the late-night time zone, the energy management module 60 charges the redox flow battery using late-night electricity (S420). That is, the energy management module 60 controls the power conversion module 20 to charge the redox flow battery 40 of the battery unit 30 with midnight electricity input from the system through the meter 11 .

And, in the late-night time zone, the energy management module 60 checks the daily average usage of the building including electric vehicle charging (S421). This can be pre-calculated and stored, or calculated directly.

In addition, the energy management module 60 determines whether the daily average electricity consumption of the building is a charge amount of 80% or more of the total capacity of the redox flow battery 40 (S422). That is, when the battery unit 30 is charged to about 80%, it is determined whether it can be used all day.

When the daily average usage of the building is 80% or more of the charged amount of the redox flow battery, the battery unit is controlled to be fully charged (S423). That is, even if the battery unit 30 is charged to about 80%, if it is not usable throughout the day, it is fully charged and used, and commercial power is used for the insufficient part.

On the other hand, when the daily average usage of the small building is less than 80% of the charge of the redox flow battery, the target state of charge of the battery unit is controlled to be charged by adding 10% to the daily average usage (S424) . That is, since the battery unit 30 can be used throughout the day even when it is charged to about 80%, it is used throughout the day after additionally charging 10% of the daily average electricity consumption with ample late-night electricity.

In addition, the energy management module determines whether the next day's weather information is sunny (S425).

When the weather information for the next day is sunny, the energy management module changes a value obtained by subtracting 50% of the daily solar charge amount charged using the sunlight from the target charge amount of the battery unit to the target charge amount (S426). Here, since charging of the solar module 80 is expected when the weather is clear, a value obtained by subtracting 50% of the daily solar charge amount from the original target charge amount is changed to a new target charge amount. Here, if necessary, it may be reduced by 50 to 100% instead of 50%, but 50% is applied for safe power supply to the battery unit.

Afterwards, when charging of the redox flow battery 40 is completed, or when electricity is required from the electric vehicle charger 70 or other loads L during charging, the energy management module 60 of the battery unit 30 Electricity is supplied from the redox flow battery 40 (S427). In some cases, when the battery unit is being charged, the energy management module 60 may supply electricity from the redox flow battery 40 of the battery unit 30 after stopping charging.

In addition, when the battery remaining amount is less than a certain reference value, the energy management module 60 may supply commercial power to the electric vehicle charger 70 or other loads L.

At this time, when an electric vehicle does not enter at night, the energy management module 60 charges the redox flow battery 40 of the battery unit 30 in the same manner as described above.

Meanwhile, when an electric vehicle enters the late-night time zone, the energy management module 60 may simultaneously charge the redox flow battery 40 of the battery unit 30 and simultaneously charge the electric vehicle.

Also, on a cloudy day during the daytime, the energy management module 60 may charge the electric vehicle by discharging the redox flow battery 40 of the battery unit 30 .

In the above embodiment of the present invention, the size of the redox battery is larger than that of the conventional battery and may occupy a lot of space, but it is also advantageous for longevity utilization in connection with house maintenance work such as water pipe management, so in the case of an apartment, a balcony is limited. In the case of a house on the side, it is appropriate to install it adjacent to the garage. Since this embodiment of the present invention has no risk of fire or explosion compared to existing lithium ion-based batteries, which have a risk of fire or explosion, and is safe in any case, safe use is guaranteed when installed in a house.

In addition, in the embodiment of the present invention, the redox flow battery, which is easy to install and maintain, can be charged using sunlight and late-night electricity, and can be used for electric vehicle charging or various powers required in small buildings or homes.

In addition, in an embodiment of the present invention, the daily average amount of electricity used for charging electric vehicles or various powers required in small buildings or homes is calculated, and the charging of the redox flow battery can be efficiently controlled based on the daily charge amount. .

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims are also included in the scope of the present invention. that fall within the scope of the right.

Claims

a distribution board through which commercial AC power is introduced into the building from the power system; An eco-friendly power generation module connected to the distribution board; a bi-directional power conversion module connected to the distribution board connected to the distribution board; A redox flow battery installed in a building; As a redox flow battery charging method of a redox flow battery charging system for charging an electric vehicle having a battery management module for monitoring state information of the redox flow battery,

determining, by an energy management module, whether it is a late-night time zone to which late-night electricity rates are applied;

charging the redox flow battery with electricity generated from the eco-friendly power generation module in non-night time zones;

A redox flow battery charging method for charging an electric vehicle using eco-friendly power generation or idle power at night, comprising the step of charging the redox flow battery using late-night electricity in the late-night time zone.
According to claim 1,

In the late-night time zone, the step of charging the redox flow battery using late-night electricity,

If it is a late-night time zone, the energy management module confirming the daily average usage of the building including electric vehicle charging;

Determining, by the energy management module, whether the daily average usage of the building is 80% or more of the total capacity of the redox flow battery;

controlling the target state of charge of the battery unit to be fully charged when the daily average usage of the building is 80% or more of the charge of the redox flow battery;

When the average daily usage of the small building is less than 80% of the charge of the redox flow battery, controlling the target state of charge of the battery unit to be charged by adding 10% to the average daily usage. A redox flow battery charging method for electric vehicle charging using power generation or idle power at night.
According to claim 2,

determining whether the next day's weather information is sunny by the energy management module;

When the weather information for the next day is clear, the energy management module further comprising changing a value obtained by subtracting 50% of the daily solar charge amount charged using the sunlight from the target charge amount of the battery unit to the target charge amount A method for charging a redox flow battery for charging an electric vehicle using eco-friendly power generation or idle power at night.
A distribution board through which commercial AC power is introduced into the building from the power system;

Teen environment power generation module connected to the distribution board;

a bidirectional power conversion module connected to the distribution board connected to the distribution board;

a battery unit including a redox flow battery installed in a predetermined building and charged by receiving DC power output from the photovoltaic module or the power conversion module;

a battery management module for monitoring state information of the redox flow battery;

Eco-friendly power generation including an energy management module that receives state information of the battery unit, diagnoses the state of the battery unit based on the received state information, and controls operations of the power conversion module and the battery management module, respectively; A redox flow battery charging system for charging electric vehicles that utilizes idle power at night.
According to claim 4,

The energy management module is an eco-friendly power generation for charging the redox flow battery with electricity generated by the eco-friendly power generation module or a redox flow battery charging system for charging an electric vehicle using idle power at night.
According to claim 5,

The energy management module is an eco-friendly power generation for charging the redox flow battery using midnight electricity or a redox flow battery charging system for charging an electric vehicle using idle power at night.
According to claim 6,

The redox flow battery,

A first electrolytic bath and a second electrolytic bath in which a first electrolyte and a second electrolyte are stored, respectively;

A stack unit connected to the power conversion module and including at least one or more battery cells in which charging and discharging are performed by a redox reaction between a first electrolyte and a second electrolyte;

A redox flow battery charging system for charging an electric vehicle that utilizes eco-friendly power generation or late-night idle power including a first circulation pump and a second circulation pump respectively supplying the first electrolyte and the second electrolyte to the stack unit.