WO2023048324A1 - 원코드 전원플러그를 이용한 전력 동기화 방법을 구비한 자동차 - Google Patents
원코드 전원플러그를 이용한 전력 동기화 방법을 구비한 자동차 Download PDFInfo
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- WO2023048324A1 WO2023048324A1 PCT/KR2021/014063 KR2021014063W WO2023048324A1 WO 2023048324 A1 WO2023048324 A1 WO 2023048324A1 KR 2021014063 W KR2021014063 W KR 2021014063W WO 2023048324 A1 WO2023048324 A1 WO 2023048324A1
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- power
- battery
- commercial
- energy storage
- storage system
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- 238000000034 method Methods 0.000 title claims description 16
- 238000004146 energy storage Methods 0.000 claims abstract description 82
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000011084 recovery Methods 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 description 10
- 238000009434 installation Methods 0.000 description 10
- 230000001360 synchronised effect Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
- B60L53/24—Using the vehicle's propulsion converter for charging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/31—Charging columns specially adapted for electric vehicles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/30—AC to DC converters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/40—DC to AC converters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/91—Electric vehicles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Definitions
- the present invention relates to an energy storage system, and in particular, prevents the energy storage system from being damaged when commercial AC power, which is a system power supply leading into a home, is restored after a blackout, so that the load can be continuously and stably supplied with commercial AC power.
- Battery AC power generated by electric power and energy stored in the battery can be supplied, and commercial AC power is supplied to the AC/DC converter for charging the battery through the input/output terminal, and at the same time, the power charged in the battery is supplied to the input/output terminal.
- the present invention relates to an energy storage system that is easy to install and does not require construction of a distribution box during installation because the power plug of the energy storage system is connected to an outlet, which is a supply terminal to which commercial AC power is supplied.
- An energy storage system is a type of battery that stores energy. It is linked to the smart grid to store power generated from new and renewable energy sources such as solar and wind power, or to store electricity from external grid power during times when electricity rates are low. It is a device that receives and stores power and discharges the stored power during times of high power consumption, thereby increasing the efficiency of power operation from the point of view of the power supplier and contributing to the use of low electricity rates from the point of view of the consumer.
- Korean Patent Registration No. 10-1616982 Smart Energy Storage System for Home Use
- Korean Patent Registration No. 10-1616982 Smart Energy Storage System for Home Use
- the prior art smart energy storage system for home use stably supplies power to loads when system power is normally supplied by commercial AC power or when commercial AC power is cut off due to power failure, but when commercial AC power is restored after a power outage,
- signal synchronization between commercial AC power and AC power generated by discharging energy stored in a battery is inconsistent, which damages the energy storage system.
- the inlet terminal of the commercial AC power supply should be connected to the input part of the AC/DC conversion unit for charging the battery, and the output terminal of the DC/AC conversion unit that converts the power charged in the battery into AC voltage should be connected to the load terminal.
- the load terminal since the load terminal must be installed in a distribution box provided in the home, installation work for the distribution box is required to mount the energy storage system to the system AC power source, so the installation is not easy.
- An object of the present invention is to prevent damage to the energy storage system when commercial AC power, which is a system power supply leading into a home, is restored after a blackout, so that the AC power of the system by commercial AC power and accumulated in the battery are constantly and stably applied to the load.
- Battery AC power generated by energy can be supplied, and commercial AC power is supplied to the AC/DC conversion unit for battery charging through the input/output terminal, and at the same time, the power charged in the battery is supplied to the load through the input/output terminal.
- Another object of the present invention is to mount the energy storage system on an electric vehicle to charge the battery of the electric vehicle, and after driving the electric vehicle, the energy storage system of the electric vehicle is supplied with one cord to an outlet supplied with commercial AC power.
- the energy storage system of the electric vehicle When plugged in, it operates as a stand-alone inverter to supply power to household appliances and to perform the function of an Uninterruptible Power Supply (UPS) to protect loads in the event of a momentary power outage in the home.
- UPS Uninterruptible Power Supply
- a vehicle having a power synchronization method using a one-cord power plug of the present invention includes a battery that provides power for driving the vehicle; and a one-cord power plug mounted on a part of the vehicle to charge the battery with the power, provide power to charge a load outside the vehicle, and have only one cord to charge the load.
- An energy storage system that synchronizes power discharged to charge the load when connected to an outlet outside the vehicle and commercial AC power supplied from the outlet, wherein the energy storage system includes the commercial AC an AC/DC conversion unit that receives power through input/output terminals and converts commercial AC power into DC power; a battery charging the DC power output from the AC/DC converter; a step-up unit that boosts the DC power charged in the battery and outputs a boosted DC voltage; a DC/AC converter for converting the boosted DC voltage into AC power and supplying battery AC power to a load through the input/output terminal; a power control unit for controlling driving of the AC/DC converter to charge the battery and controlling driving of the DC/AC converter to supply AC power from the battery to the load; an inductor having one terminal connected to a supply terminal to which the commercial AC power is supplied; a switching unit having one terminal connected to the other terminal of the inductor and the other terminal connected to the input/output terminal; a current determination unit comparing the inductor current flowing through the inductor
- An embodiment of the present invention prevents damage to the energy storage system when commercial AC power, which is the system power supply to the home, is restored after a power outage, and continuously and stably accumulates in the AC power and battery of the system by commercial AC power to the load.
- the battery AC power generated by the generated energy can be supplied, commercial AC power is supplied to the AC/DC converter for charging the battery through the input/output terminal, and at the same time, the power charged in the battery is supplied to the load through the input/output terminal. Since it is used by connecting the power plug of the energy storage system to the outlet, which is the supply terminal for supplying commercial AC power, it does not require construction of a distribution box during installation and can be installed conveniently.
- the energy storage system is mounted on an electric vehicle to charge the battery of the electric vehicle, and after driving the electric vehicle, the power of the energy storage system of the electric vehicle is plugged into an outlet supplied with commercial AC power with one cord. It operates as a stand-alone inverter to supply power to home appliances and perform the function of an Uninterruptible Power Supply (UPS) in the event of a momentary power outage in the home. It provides the effect of preventing the energy storage system from being damaged by instantaneously synchronizing the generated AC power and making it unnecessary and convenient to install the installation work for the distribution box.
- UPS Uninterruptible Power Supply
- FIG. 1 is a block diagram of an energy storage system according to an embodiment of the present invention.
- FIG. 2 is a waveform diagram of a commercial AC power supply inductor current, a switching control signal, and load supply power for explaining the operation of an energy storage system according to an embodiment of the present invention.
- FIG. 3 is a configuration diagram of a vehicle equipped with a power synchronization method using a one-cord power plug according to an embodiment of the present invention.
- FIG. 4 is an application example of a vehicle equipped with a power synchronization method using a one-cord power plug according to an embodiment of the present invention.
- the energy storage system of the present invention receives commercial AC power (Vac), which is a system power source, through an input/output terminal (IOP) and converts commercial AC power into DC power (10). ), a battery (B) that charges the DC power output from the AC/DC converter 10, and a step-up unit (20) that boosts the DC power charged in the battery (B) to output a boosted DC voltage (DC).
- Vac commercial AC power
- IOP input/output terminal
- DC DC voltage
- a power control unit 40 that controls driving of the AC/DC converter 10 so that charging is performed and controls driving of the DC/AC converter 30 to supply battery AC power Bac to the load 70.
- one terminal is connected to the supply terminal (ACP) to which commercial AC power (Vac) is supplied, and an inductor (L), one terminal is connected to the other terminal of the inductor (L), and the other terminal is the input/output terminal (IOP)
- the switching unit (SW) connected to and the current determination unit 50 that compares the inductor current (IL) flowing through the inductor (L) and the restoration limit current (Iref) determined by the user, and the current determination unit (50) If the inductor current (IL) is less than the restoration limit current (Iref), the activated switching control signal (SWC) is output to turn on the switching unit (SW), and if the inductor current (IL) is equal to the restoration limit current (Iref), The deactivated switching control signal (SWC) is output to turn off the switching unit (SW), and when the reference time (Tref) determined by the user elapses after the switching control signal (SWC) is deactivated, the switching control signal (SWC) is turned off. It is
- ACP supply terminal
- Vac commercial AC power
- L inductor
- the AC/DC converter 10 As shown in FIG. 1, the AC/DC converter 10, the battery B, the booster 20, the DC/AC converter 30, and the power controller 40 of the present invention This is a typical configuration of an energy storage system.
- the AC/DC converter 10 receives commercial AC power (Vac) from the supply terminal (ACP) through the input/output terminal (IOP) to which the commercial AC power (Vac), which is the system power, is supplied, and converts the commercial AC power (Vac).
- the DC power corresponding to the charging voltage of the battery B is converted into DC power, and the DC power is charged in the battery B.
- the step-up unit 20 boosts the DC power charged in the battery B to a DC voltage of about 400V and outputs a boosted DC voltage (DC).
- the DC/AC conversion unit 30 converts the boosted DC voltage (DC) into AC power and supplies the battery AC power (Bac) to the load 70 through the input/output terminal (IOP).
- the power control unit 40 controls the operation of the AC/DC conversion unit 10 so that the battery B is in a set state of charge, and when the energy stored in the battery B is discharged, the battery AC power Bac is supplied.
- the drive of the DC/AC conversion unit 30 is controlled to be supplied to the load 70 .
- Discharge conditions can be set in various ways, such as a daytime zone set to be used for peak loads during the day or power failure.
- the load 70 When the commercial AC power (Vac), which is the grid power, is normally supplied, the load 70 is driven by the commercial AC power (Vac), or in the case of a discharge condition, the load (70) connects the commercial AC power (Vac) and the battery AC power ( Bac).
- Vac commercial AC power
- Vac battery AC power
- the restoration limit current (Iref) determined by the user is set to 40A, which is a value greater than the maximum current supplied to the load, the commercial AC power source (ac) is normally supplied or the current determination unit in case of power failure.
- (50) compares the inductor current (IL) flowing through the inductor (L) with the recovery limit current (Iref). At this time, since the inductor current (IL) always has a smaller value than the recovery limit current (Iref), the switching control unit 60 outputs an activated switching control signal (SWC), and the switching unit (SW) is in an on state by the activated switching control signal (SWC).
- the switching unit (SW) is continuously on when the commercial AC power source (ac) is normally supplied or there is a power outage
- the load ( 70) is driven or in a discharge condition
- the load 70 is driven by the commercial AC power supply (Vac) and the battery AC power (Bac), and in case of a power outage, the battery AC power (Bac) through the input/output terminal (IOP). It is supplied to the load 70 and the load 70 is driven.
- the battery AC power (Bac) is also supplied to the supply terminal (ACP) through the input/output terminal (IOP), and as shown in FIG. ) and the battery AC power (Bac) is 180 degrees, that is, if the AC power of the battery AC power (Bac) is +220V and the commercial AC power (Vac) is -220V, the inductor current (IL) is generated by the inductor (L) ) becomes large, and when the inductor current IL increases by the current determination unit 50 and becomes the same value as the recovery limit current Iref, the switching control unit 60 outputs a deactivated switching control signal SWC. And, the switching unit (SW) is turned off by the deactivated switching control signal (SWC), so that the inductor current (IL) becomes zero.
- the inductor current (IL) gradually increases by the inductor (L), and when the inductor current (IL) becomes the same value as the recovery limit current (Iref), the switching unit (SW) is turned off, and the switching unit ( Since the battery AC power (Bac) is not output through the supply terminal (ACP) by turning off the SW), only commercial AC power (Vac) is supplied to the load 70.
- the switching control unit 60 outputs the activated switching control signal SWC when a reference time Tref determined by the user, about 3 seconds, after the switching control signal SWC is deactivated by power recovery, is output to the switching unit ( SW) is turned on and the energy storage system operates normally.
- the present invention can continuously and stably supply the AC power of the system by the commercial AC power source and the battery AC power generated by the energy stored in the battery to the load 70 even when power is restored.
- FIG. 3 is a block diagram of a vehicle equipped with a power synchronization method using a one-cord power plug according to an embodiment of the present invention.
- a vehicle equipped with a power synchronization method using a one-cord power plug includes a battery 110, an inverter 120, a motor 130, a reducer 140, and an energy storage system.
- ESS Energy Storage System
- ESS 150 a cable 160 and a one-cord power plug 170 may be included.
- a vehicle may mean an electric vehicle (EV, Electronic Vehicle) that uses electricity as a main power source, such as an electric vehicle, a fuel cell electric vehicle, or a hybrid vehicle.
- EV Electric Vehicle
- a fuel cell electric vehicle such as a fuel cell electric vehicle
- a hybrid vehicle such as a fuel cell electric vehicle, or a hybrid vehicle.
- an electric vehicle will be described as an example.
- the electric vehicle 100 converts high-voltage battery 110 power into three-phase AC power to drive a three-phase AC motor such as a permanent magnet synchronous motor or an induction motor, and is connected through a motor shaft and a reducer 140. Drive the wheels to move the vehicle.
- the battery 110 may provide power for driving the electric vehicle 100 .
- the inverter 120 may drive the motor 130 through a transition converter by using the power of the battery 110 as an input.
- the inverter 120 may include a power semiconductor and a DC link capacitor as main power unit components.
- the inverter 120 includes a cooling unit for dissipating heat generated from a switching element, etc., a bus bar for connecting a high voltage battery 110 or a motor 130, or a power distribution unit, a connector, and a switching element. It may include a control board for controlling, a gate board, and the like.
- the electric vehicle 100 uses electricity as an energy source, electricity must be stored and stored as an energy source. For this purpose, the battery 110 must be charged through a general commercial power source. However, when charging the electricity of the electric vehicle 100 using a charging station, since electric charging stations must be installed in various places in a power shortage area, a huge budget and delay may be limited.
- an energy storage system is installed in a part of the electric vehicle 100 to charge the battery 110, which is an energy storage device of the electric vehicle 100, using high-voltage commercial power.
- the energy storage system 150 may be implemented as the energy storage system 150 shown in FIGS. 1 and 2 .
- the one-cord power plug 170 may be connected to a commercial AC power source (eg, AC 220V) through a cable 160.
- the energy storage system 150 connects a supply terminal (ACP) supplied with commercial AC power (Vac) to an outlet through a single cable 160 and a one-cord power plug 170 in a plug-in manner.
- ACP supply terminal
- Vac commercial AC power
- the energy storage system 150 may supply power to the battery 110 or discharge power stored in the energy storage system 150 to transmit power to the grid. Determining whether to charge the battery 110 of the electric vehicle 100 or transmit power to the grid may be determined by the power controller 40 or the controller 151 of the energy storage system 150 .
- the power control unit 40 or the controller 151 may control an operation to charge the battery 110 in a charging mode, and may control power to be transmitted to a system in a discharging mode.
- the energy storage system 150 enables a charging operation or a discharging operation to be performed at a predetermined specific time desired by a user.
- the energy storage system 150 charges the power of the battery 110 at a time when electricity rates are low (eg, late night time when low prices are applied) and sets a specific time (eg, , peak power charged in the battery 110 may be discharged in a balanced manner during daytime hours when power consumption increases and electricity rates are high.
- the energy storage system 150 charges the battery 110 at a predetermined specific time and performs a discharging operation when the power charged in the battery 110 exceeds the peak value of power consumption consumed by the battery 110. can do.
- the energy storage system 150 may automatically set a peak value of power consumption.
- the energy storage system 150 stores the peak value of the power consumption supplied to the load 70 as an average pattern value for a certain period of time when the consumer uses the power, and the maximum peak value and the minimum peak value may be set.
- the energy storage system 150 includes a controller 151 so that power is charged and discharged within a range of a maximum peak value and a minimum peak value. For example, the energy storage system 150 may set power equal to or greater than the average pattern value as a peak value.
- FIG. 4 is an application example of a vehicle equipped with a power synchronization method using a one-cord power plug according to an embodiment of the present invention.
- the one-cord power plug 170 of the energy storage system 150 is connected to an external outlet of the electric vehicle 100 and can be connected to other vehicles or home appliances. Accordingly, in an embodiment of the present invention, residual power remaining in the energy storage system 150 after driving the electric vehicle 100 can be used as power for charging home appliances or other vehicles.
- the AC power discharged from the energy storage system 150 is the power supplied from the outlet. It can perform a stand-alone inverter function to supply power to home appliances or other vehicles in synchronization with. In addition, it can perform the function of an uninterruptible power supply (UPS) to protect home appliances by overcoming power failure and supplying stable AC power in surge situations such as momentary power outages in the home. It can serve as an outlet for power pass-through and additional power supply.
- UPS uninterruptible power supply
- the embodiment of the present invention applies a one-code energy storage system 150 as shown in FIGS. 1 and 2, rather than the conventional two-line method, to be synchronized with the power system instantaneously to prevent damage to the inverter. do.
- the energy storage system 150 when the power plug 170 of the energy storage system 150 is plugged into an outlet, power is discharged from the energy storage system 150 and power is supplied to the outlet. If power supplied from the energy storage system 150 is not synchronized with power supplied from an outlet (generally, power supplied from KEPCO), the energy storage system 150 may be damaged.
- an uninterruptible power supply is provided by plugging the one-cord power plug 170 of the energy storage system 150 into an outlet to supply power to home appliances or other vehicles. It operates as a stand-alone inverter by performing the function of a power supply (UPS), and when commercial AC power is restored, the AC power supplied from the energy storage system 150 and the AC power of the outlet are synchronized instantaneously to save energy
- the storage system 150 can be prevented from being damaged.
- the embodiment of the present invention is capable of synchronizing the power supplied from the energy storage system 150 with the power restored by the energy storage system 150 described in FIGS. ) is used, so there is no need for separate installation work for the distribution box by the one-code method.
- the embodiment of the present invention is to mount the energy storage system 150, which is a grid-connected inverter, to the electric vehicle 100 so that one cord (one cord) power plug 170 can charge the own vehicle or other vehicle. It may be used as a vehicle charging cord for home use or as a home charging cord for charging home appliances.
- the embodiment of the present invention is a function of charging the high voltage battery 110 of the electric vehicle 100, a vehicle to load (V2L) function of delivering power to a load such as home appliances at home, and a one-cord power plug ( 170), it is possible to perform a V2G (Vehicle to Grid) function that delivers power to the grid.
- V2L vehicle to load
- V2G Vehicle to Grid
- the embodiment of the present invention since charging and discharging are performed only by connecting the energy storage system 150 and an outlet, there are few restrictions on installation space and no separate wiring work is required.
- the embodiment of the present invention connects the energy storage system 150 to a place with a general commercial AC power source (eg, AC 220V) without going through an electric charging station, thereby reducing the load on the low-voltage line of the actual consumption power grid. Since it does not go through a transformer, the loss of transmission power can be reduced.
- the embodiment of the present invention determines the power state of the load in the energy storage system 150 and performs a power supply operation associated with the grid, thereby reducing the peak of grid power.
- an electric vehicle using electricity as a main power source has been described as an example.
- the embodiment of the present invention is not limited thereto, and the above operation can be performed by mounting the energy storage system 150 to a vehicle using power such as a fuel cell, a battery, and a capacitor, and the type of vehicle is limited to this. It doesn't work.
- the present invention prevents the energy storage system from being damaged when the commercial AC power, which is the grid power entering the home, is restored after a blackout, so that the AC power of the system by the commercial AC power source and the energy accumulated in the battery are constantly and stably applied to the load. to supply battery AC power generated by
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Abstract
Description
Claims (4)
- 차량을 구동하기 위한 전원을 제공하는 배터리; 및상기 차량의 일부에 장착되어 상기 배터리에 상기 전원을 충전하고, 상기 차량의 외부에 있는 부하를 충전하기 위한 전원을 제공하며, 상기 부하를 충전하기 위해 하나의 코드만 갖는 원코드 전원플러그를 상기 차량의 외부에 있는 콘센트에 접속하는 경우 상기 부하를 충전하기 위해 방전되는 전원과 상기 콘센트에서 공급되는 상용교류전원을 동기화시키는 에너지 저장 시스템을 포함하고,상기 에너지 저장 시스템은,계통전원인 상기 상용교류전원(Vac)을 입출력단자(IOP)로 입력받아 상용교류전원을 직류전원으로 변환하는 교류/직류 변환부(10);상기 교류/직류 변환부(10)에서 출력되는 직류전원을 충전하는 배터리(B);상기 배터리(B)에 충전된 직류전원을 승압시켜 승압직류전압(DC)을 출력하는 승압부(20);상기 승압직류전압(DC)을 교류전원으로 변환하여 배터리 교류전력(Bac)을 상기 입출력단자(IOP)를 통해 부하(70)에 공급하는 직류/교류 변환부(30);상기 배터리(B)가 충전이 이루어지도록 상기 교류/직류 변환부(10)의 구동을 제어하고, 상기 배터리 교류전력(Bac)을 상기 부하(70)에 공급되게 상기 직류/교류 변환부(30)의 구동을 제어하는 전력제어부(40);한 단자가 상기 상용교류전원(Vac)이 공급되는 공급단자(ACP)에 연결된 인덕터(L);한 단자가 상기 인덕터(L)의 다른 단자와 연결되고, 다른 단자가 상기 입출력단자(IOP)에 연결된 스위칭부(SW);상기 인덕터(L)에 흐르는 인덕터전류(IL)와 사용자에 의해 정해지는 복전제한전류(Iref)를 비교하는 전류판단부(50); 및상기 전류판단부(50)에서 상기 인덕터전류(IL)가 상기 복전제한전류(Iref) 보다 작으면 활성화된 스위칭제어신호(SWC)를 출력하여 상기 스위칭부(SW)를 온시키고, 상기 인덕터전류(IL)가 상기 복전제한전류(Iref)와 동일하면 비활성화된 스위칭제어신호(SWC)를 출력하여 상기 스위칭부(SW)를 오프시키고, 상기 스위칭제어신호(SWC)가 비활성화된 이후 사용자에 의해 정해지는 기준시간(Tref)이 경과되면 상기 스위칭제어신호(SWC)를 활성화시켜 상기 스위칭부(SW)를 온시키는 스위칭제어부(60)를 구비한 것을 특징으로 하는 원코드 전원플러그를 이용한 전력 동기화 방법을 구비한 자동차.
- 제 1 항에 있어서,상기 상용교류전원(Vac)이 공급되는 공급단자(ACP)는 상기 콘센트에 연결시키고, 상기 인덕터(L)의 한 단자에는 상기 원코드 전원플러그를 연결하여 상기 전원플러그를 상기 콘센트에 접속시키는 것을 특징으로 하는 원코드 전원플러그를 이용한 전력 동기화 방법을 구비한 자동차.
- 제 1 항에 있어서, 상기 에너지 저장 시스템은상기 콘센트에서 상기 상용교류전원이 공급되지 않는 서지 상황에서 상기 원코드 전원플러그가 상기 콘센트에 접속되는 경우 상기 부하에 전원을 공급하는 무정전 전원 장치(UPS;Uninterruptible Power Supply)의 기능을 수행하고,상기 콘센트에 상기 원코드 전원플러그가 접속된 상태에서 상기 상용교류전원이 다시 복전되는 경우 상기 부하를 충전하기 위해 상기 에너지 저장 시스템에서 방전되는 전원과 상기 콘센트에서 공급되는 상기 상용교류전원을 동기화시키는 원코드 전원플러그를 이용한 전력 동기화 방법을 구비한 자동차.
- 제 1 항에 있어서, 상기 에너지 저장 시스템은,사용자가 원하는 기 설정된 특정 시간에 상기 배터리에 상기 전원을 충전하는 충전 동작 또는 상기 부하를 충전하기 위한 전원이 제공되는 방전 동작이 수행되며,상기 배터리에 충전되는 전원이 상기 배터리에서 소비되는 소비 전력의 피크 값을 초과하는 경우 상기 방전 동작이 수행되며, 최대 피크 값과 최소 피크 값의 범위 내에서 상기 전원의 충전과 방전이 이루어지도록 제어하는 제어기를 더 포함하는 원코드 전원플러그를 이용한 전력 동기화 방법을 구비한 자동차.
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