KR102068177B1 - Energy storage device, and system for supplying power including the same - Google Patents

Abstract

The present invention relates to an energy storage device and a power supply system having the same. The power supply system according to an embodiment of the present invention is a power supply system for charging or discharging energy by using three-phase AC power from a system and photovoltaic power generated by a solar module, and electrically Electrical loads connected in parallel with the first energy storage device, the first energy storage device of the single phase type electrically connected to the loads connected to the first phase of the three phases, and the first and second phases of the three phases. And a second energy storage device connected to the first phase, and a first single-phase inverter electrically connected to the first phase to convert the DC power generated from the solar module into AC power and to supply the first phase. As a result, the energy can be efficiently charged and discharged.

Description

Energy storage device, and a power supply system having the same {Energy storage device, and system for supplying power including the same}

The present invention relates to an energy storage device and a power supply system having the same, and more particularly, to an energy storage device capable of efficiently charging and discharging energy, and a power supply system having the same.

As the recent depletion of existing energy resources such as oil and coal is expected, interest in alternative energy to replace them is increasing. Accordingly, interest in renewable energy using solar, wind, and hydropower is increasing.

With renewable energy, it is necessary to supply energy or store energy, so that an energy storage device for storing energy is used.

An object of the present invention is to provide an energy storage device capable of efficiently charging and discharging energy, and a power supply system having the same.

Power supply system according to an embodiment of the present invention for achieving the above object is a power supply system for charging or discharging energy by using a three-phase AC power from the grid and the solar power generated in the solar module, three-phase Loads electrically connected to each phase of the first phase, a first energy storage device of a single phase type electrically connected to a first phase of the three phases, and a first phase and the second phase of the three phases, and are electrically connected to each other. A second energy storage device connected in parallel with the first energy storage device, and a first single-phase inverter electrically connected to the first phase and converting the DC power generated from the solar module into AC power to supply the first phase. Include.

In addition, the energy storage device according to an embodiment of the present invention for achieving the above object, using the single-phase AC power source from the first phase of the three-phase AC power source from the system and the solar power generated in the solar module, An energy storage device for charging or discharging a battery, comprising: at least one battery pack, a communication module configured to receive a charge command or a discharge command from an external source, and receive or discharge AC power supplied to a first phase based on a charge command On the basis of the command, the connection portion for outputting the AC power to the first phase, and based on the charge command, based on the discharge command when receiving the AC power from the first phase and converting to DC power or receiving a discharge command The power supply unit converts the DC power stored in the battery pack into AC power.

The power supply system according to an embodiment of the present invention is a power supply system for charging or discharging energy by using three-phase AC power from a grid and photovoltaic power generated by a solar module. The first and second energy storage devices of the single phase type are connected in parallel with each other, and a single phase inverter for supplying solar power is connected to the first phase. As a result, the first and second energy storage devices can be efficiently charged with solar power.

On the other hand, in the state where the loads are electrically connected to each of the three phases, energy discharge can be efficiently performed by outputting corresponding required powers in the first and second energy storage devices according to the required power amounts of the loads. .

As a result, it is possible to implement a virtual three-phase energy storage device using this single-phase energy storage device.

1 to 2 are diagrams illustrating charge and discharge in a conventional power supply system configuration.
3 illustrates a power supply system according to a first embodiment of the present invention.
4A is a perspective view illustrating an example of the energy storage device of FIG. 3.
4B is a block diagram of the energy storage device of FIG. 1.
5 to 6 are views referred to for explaining the charge and discharge operation of the power supply system of FIG.
7 to 8 are views for explaining the charge and discharge operation of the power supply system according to a second embodiment of the present invention.
9 illustrates a power supply system according to a third embodiment of the present invention.

Hereinafter, with reference to the drawings will be described the present invention in more detail.

The suffixes "module" and "unit" for components used in the following description are merely given in consideration of ease of preparation of the present specification, and do not impart any particular meaning or role by themselves. Therefore, the "module" and "unit" may be used interchangeably.

1 to 2 are diagrams illustrating charge and discharge in a conventional power supply system configuration.

First, referring to FIG. 1, the conventional power supply system 10 uses a three-phase energy storage device 50 as a power supply system based on a Samsung AC power supply.

Specifically, the power supply system 10 of FIG. 1 is a power supply system, which is associated with a three-phase AC power source of a three-phase system, and includes a solar module 200, a single phase inverter 210, and loads 700a, 700b, and 700c. And a three-phase energy storage device 50.

Meanwhile, in the drawing, loads 700a, 700b and 700c may be connected between the three phases L1, L2 and L3 and the three phase energy storage device 50.

Meanwhile, FIG. 1 illustrates a charging operation in the three-phase energy storage device 50 based on solar power from the solar module 200.

In the figure, it illustrates that PV power is supplied to the first phase. For example, when the amount of power that can be stored in the three-phase energy storage device 50 is 90 W in total and 30 W each through each phase, when 30 W of solar power is supplied to the first phase L1, only 30 W is three-phase. Charged to the energy storage device 50, the rest, 60W, as feed-in power, can only be supplied to the system through the first phase (L1).

The three-phase energy storage device 50 can charge the solar power 30W as the charge power only through the first phase L1, and for the second and third phases L2 and L3, It should be charged by receiving 30W of charge power from the system, not solar power. Accordingly, a problem arises in that unnecessary power needs to be supplied from the system compared to the generated solar power.

Next, FIG. 2 illustrates a discharge operation in the three-phase energy storage device 50 as the power supply system 10 having the structure as shown in FIG. 1.

As shown in the drawing, when the first load 700a, the second load 700b, the third load 700c, and each of the required powers are 60 W, 30 W, and 0 W in total of 90 W, the three-phase energy storage device. 50 may perform a charging operation.

At this time, when the amount of power that can be stored in the three-phase energy storage device 50 is 90W in total, and 30W can be output through each phase, the three-phase energy is applied to the second load 700b connected to the second phase L2. The discharge power 30W from the storage device 50 may be supplied. However, since the required power amount is 0W, the third load 700c connected to the three phase L3 may be supplied from the three phase energy storage device 50. The discharge power 30W is output to the system as feed-in power.

Meanwhile, only 30W of discharge power is supplied from the three-phase energy storage device 50 to the first load 700a connected to the first phase L1, and the other shortage 30W should be supplied from the system. Accordingly, when discharging from the three-phase energy storage device 50, there is a problem in that unnecessary power must be supplied from the system compared to the power required by the load.

In the present invention, in order to solve this problem, the first and second energy storage devices of the single-phase system that are electrically connected to the first phase of the three phases are connected in parallel to each other, and the second energy storage device is connected to the second phase. It is proposed that a single-phase inverter which is electrically connected and supplies solar power to the first phase is connected. At this time, the loads are connected to each phase may be the same.

According to this method, when the solar power is larger than the chargeable power of the first energy storage device, the solar power may be charged not only by the first energy storage device but also by a second energy storage device connected in parallel to the first energy storage device. have. By this, an efficient charging operation can be performed.

On the other hand, during discharge, when the required power amount of the first load connected to the first phase is larger than the amount of power stored in the first energy storage device, the first energy storage device as well as the first power storage device are connected in parallel to the first energy storage device. 2 may be discharged to the first load by using the power stored in the energy storage device. By this, an efficient charging operation can be performed.

This will be described in detail with reference to FIG. 3 and below.

3 illustrates a power supply system according to a first embodiment of the present invention.

Referring to the drawings, the power supply system 20 according to an embodiment of the present invention, the solar power regenerated from the solar module 200, or commercial AC power of the three-phase system, single-phase energy storage devices Can be charged to (100a, 100b, 100c).

In addition, the power supply system 20 may cause at least some of the stored power stored in the energy storage devices 100a, 100b, and 100c to be discharged to at least some of the plurality of loads 700a, 700b, and 700c, respectively. have.

To this end, the power supply system 20 of FIG. 3 has loads 700a, 700b, 700c electrically connected to each phase of the three phases of the system, single phase energy electrically connected to each of the three phases of the system. Electrically connected to the storage devices 100a, 100b, 100c, and the first phase L1, and converts the direct current power generated from the solar module 200 into an AC power source, It may be provided with a single-phase inverter 210 to supply.

On the other hand, the power management device 500 to perform the charge or discharge control for the energy storage devices (100a, 100b, 100c), and the power amount detectors (410a, 410b, 410c) for detecting the amount of power flowing in each of the three phases And a system power amount detector 410d for detecting a system power amount of the first phase of the three phases, and an integrated power amount detector 300 for detecting the three phase integrated power amount.

Referring to the drawings, the first to third loads 700a, 700b, and 700c are electrically connected to the first phase L1, the second phase L2, and the third phase L3, respectively.

Meanwhile, the energy storage devices 100a, 100b, 100c are electrically connected to each of the three phases. That is, the first energy storage device 100a is in the first phase L1, the second energy storage device 100b is in the second phase L2, and the third energy storage device 100c is in the third phase. In phase L3, it can be electrically connected.

On the other hand, for efficient charging or discharging, the second energy storage device 100b may be electrically connected to the first phase L1 and the third energy storage device 100c may be electrically connected to the first phase L1. have.

Meanwhile, in the drawing, since the energy storage devices 100a, 100b, and 100c are electrically connected to each of the three phases, the virtual three-phase energy storage device may be implemented by using the single-phase energy storage device.

The power amount detectors 410a, 410b, and 410c detecting the amount of power flowing in each phase of the three phases may detect the amount of power supplied to each phase and transmit the amount of power supplied to each phase to the power management apparatus 500 or the energy storage device.

For example, when the solar power from the solar module is output to the first phase L1 through the single-phase inverter 210, the first power amount detection unit 410a may detect the power amount. The detected amount of power may be transmitted to the power management device 500 or the first energy storage device 100a.

On the other hand, the internal and external configurations of each energy storage device will be described later with reference to FIGS. 4A to 4B.

On the other hand, the solar module 200 converts the sunlight into a direct current power source and outputs it. To this end, the solar module 200 may include a plurality of solar cells (not shown). In addition, an upper surface of the first sealing material (not shown) and the second sealing material (not shown) positioned on the lower surface and the upper surface of the plurality of solar cells, the rear substrate (not shown) and the second sealing material positioned on the lower surface of the first sealing material. It may further include a front substrate (not shown) located in.

First, a solar cell is a semiconductor device that converts solar energy into electrical energy, and is a silicon solar cell, a compound semiconductor solar cell, a tandem solar cell, and a dye-sensitized solar cell. Or CdTe, CIGS-type solar cells, or the like.

Meanwhile, the single phase inverter 210 receives DC power from the solar module 200, performs power conversion, and outputs AC power. To this end, the single phase inverter 210 may include a bypass diode (not shown), a smoothing capacitor, an inverter (not shown), and the like.

In addition, the single-phase inverter 210 may further include a communication module (not shown) for communication with the power management device 500. In addition, the single-phase inverter 210 may receive solar power adjustment information from the power management device 500 and adjust the output solar power.

The power management device 500 is a device capable of managing power in the power supply system 20 and may be referred to as a home energy management system (HEMS).

To this end, the power management apparatus 500 may perform wireless data communication with each of the energy storage devices 100a, 100b, and 100c. For example, wireless data communication may be performed between the power management apparatus 500 and each of the energy storage devices 100a, 100b, and 100c by a ZigBee or a WiFi communication method.

The power management device 500 may receive power-on information or energy storage information from each of the energy storage devices 100a, 100b and 100c and charge the respective energy storage devices 100a, 100b and 100c. Commands, discharge commands, and the like.

In addition, the power management apparatus 500 may perform wireless data communication with the single-phase inverter 210. In detail, the power management apparatus 500 may receive the solar power information generated by the solar module 200 and converted into power by the single phase inverter 210 from the single phase inverter 210.

In addition, the power management apparatus 500 may perform wireless data communication with a power distribution unit (not shown) for supplying AC power of a three-phase system. On the other hand, the power management device 500 may receive commercial power information supplied to the power supply system 20 from a commercial power plant, and may receive required power information consumed by the power supply system 20.

Meanwhile, the power management apparatus 500 may perform wireless data communication with the plurality of loads 700a, 700b, and 700c. In detail, the power management apparatus 500 may receive required power information required by each load from the plurality of loads 700a, 700b, and 700c.

Meanwhile, the power management apparatus 500 may perform wireless data communication with the energy storage devices of which power is turned on among the energy storage devices 100a, 100b, and 100c.

In detail, the power management apparatus 500 may receive a pairing request signal as power-on information from the energy storage device to which power is turned on, and in response thereto, transmit a pairing response signal including a radio channel allocation signal or the like. Can be. The power management apparatus 500 may perform wireless data communication through the allocated wireless channel when pairing with the energy storage device that is turned on is completed.

In the power management apparatus 500, at least one of the energy storage devices 100a, 100b, and 100c may be charged based on at least one of solar power information, commercial power information, required power information, and energy storage amount information. Alternatively, it may be determined to operate in a discharge mode, and a charge command or a discharge command may be generated according to the determined charge mode or discharge mode.

4A is a perspective view illustrating an example of the energy storage device of FIG. 3.

Referring to FIG. 4A, the energy storage device 100 displays a power-on state when the power supply is turned on, when a plug 112 is connected to a socket for electrically connecting to an internal power grid. Or a display unit 105 capable of displaying an energy storage amount or the like. By this display unit 105, the user can immediately grasp the energy storage amount.

4B is a block diagram of the energy storage device of FIG. 1.

Referring to the drawing, the energy storage device 100 may include a connection unit 130, a power converter 140, a communication module 150, and a battery pack 160 embedded therein.

The connection unit 130 may include only an AC power terminal (not shown). According to an embodiment of the present invention, the energy storage device 100 receives the AC power supplied to the internal power grid through the solar module 200 based on a charging command from the power management device 500, Based on the discharge command from the power management device 500, the AC power can be output to the internal power grid. Accordingly, the DC power supply terminal is not necessary, and only the AC power supply terminal is provided.

When the power conversion unit 140 receives a charging command from the power management device 500, the power converter 140 may receive an AC power from an internal power grid and convert the AC power into a DC power based on the charging command. In addition, the converted DC power may be transferred to the battery pack 160.

When the power converter 140 receives a discharge command from the power management device 500, the power converter 140 may convert the DC power stored in the battery pack 160 into an AC power based on the discharge command. In addition, the converted AC power may be transmitted to the internal power grid described above via the connection unit 130.

To this end, the power conversion unit 140 receives AC power from the internal power grid and converts the power into DC power, or converts the DC power stored in the battery pack 160 into AC power based on a discharge command. It may have a bidirectional ac / dc converter.

The communication module 150 performs data communication with the power management apparatus 500. For example, the power management device 500 may transmit power on information or energy storage amount information, and receive a charge command or a discharge command from the power management device 500.

In this case, when the power management device 500 performs an AP function for providing a network in the power supply system 20, the communication module 150 and the power management device 500 may transmit data based on WiFi communication. I can exchange it.

On the other hand, in another example, when the power management device 500, the power information transmission for power management in the power supply system 20 is the main function, the communication module 150 and the power management device 500 by the Zigbee communication method. Data can be exchanged between. Meanwhile, various methods besides WiFi communication and Zigbee communication are possible.

On the other hand, when the power supply is turned on, the communication module 150 may transmit a pairing request signal to the power management device 500 as power-on information. In addition, the pairing response signal including the radio channel information allocated from the power management apparatus 500 may be received. Accordingly, the communication module 150 may perform wireless data communication with the power management device 500 through a wireless channel different from the other energy storage device 100.

The communication module 150 may receive a charge command or a discharge command from the power management device 500 after the pairing ends. In addition, after completion of the pairing, the communication module 150 may transmit the energy storage amount information stored in the battery pack 160 to the power management apparatus 500.

The communication module 150 may control the power converter 140 and the battery pack 160.

For example, when receiving a charging command, the communication module 150 may control the operation of the power converter 140 to convert AC power from the internal power grid into DC power. In addition, the communication module 150 may control the battery pack 160 to store the converted DC power in the battery pack 160.

As another example, the communication module 150 controls the operation of the battery pack 160 when the discharge command is received so that the DC power stored in the battery pack 160 is transferred to the power converter 140. The communication module 150 may control the power converter 140 to convert the DC power transmitted to the power converter 140 into AC power.

That is, the communication module 150 may control the battery pack 160 to operate in a charge mode or a discharge mode.

The battery pack 160 may include a battery controller 162, a battery cell unit 164, and a temperature controller 166 in the battery pack case.

The battery cell unit 164 includes a plurality of battery cells. These battery cells can be connected in series, in parallel or in series or parallel mixing.

The temperature controller 166 adjusts the temperature of the battery cell unit 164. To this end, the temperature controller 166 may include a temperature sensing means (not shown) to sense the temperature of the battery cell unit 164. Meanwhile, the temperature controller 166 may further include a fan driving unit (not shown), and may drive the fan to lower the temperature of the battery cell unit 164 based on the sensed temperature. The fan drive means is preferably disposed in an area corresponding to an area in which all battery cells are disposed in order to improve efficiency of temperature regulation.

Meanwhile, the battery controller 162 performs overall control of the battery pack 160. For example, when the temperature of the battery cell unit 164 rises above a predetermined temperature, the temperature adjusting unit 166 may be controlled to reduce the temperature.

As another example, the battery controller 162 may adjust the balancing of the DC power stored in each battery cell in the battery cell unit 164. The DC power stored in the battery cell is sensed, and based on this, the balancing of the DC power can be adjusted.

The battery controller 162 may transfer state information (temperature, stored power level, etc.) of the battery pack 160 to the communication module 150. In addition, the battery controller 360 may receive state information (required power level, etc.) of the energy storage device 100 from the communication module 150.

5 to 6 are views referred to for explaining the charge and discharge operation of the power supply system of FIG.

First, FIG. 5 illustrates a charging operation in the plurality of single-phase energy storage devices 100a, 100b, and 100c based on PV power from the solar module 200.

In the drawing, PV power is supplied to the first phase L1. For example, the case where the amount of power that can be stored in each of the single-phase energy storage devices 100a, 100b, and 100c is 30W, respectively, is illustrated when the solar power amount 90W is supplied to the first phase L1.

Each of the energy storage devices 100a, 100b, 100c in the power supply system 20 of FIG. 5 is a single phase energy storage device, which is electrically connected to each of the phases L1, L2, L3, as well as the first phase. The second and third energy storage devices 100b and 100c are further electrically connected to L1. That is, compared to the first phase L1, the first to third energy storage devices 100a, 100b, and 100c may be electrically connected in parallel to each other.

As a result, the amount of solar power 90W is distributed to the first to third energy storage devices 100a, 100b, and 100c by 30W, respectively, and thus, can be charged. That is, all of the solar power 90 W is charged in the first to third energy storage devices 100a, 100b, and 100c, and is not output to the system.

In this way, in the power supply system, which is connected to the three-phase cell, it is possible to efficiently charge the solar power by electrically connecting a plurality of single-phase energy storage devices to any one to which the solar power is supplied. .

Next, FIG. 6 illustrates a discharge operation in the plurality of single-phase energy storage devices 100a, 100b and 100c based on the demand power of each of the loads 700a, 700b and 700c.

In the drawing, the required power amount of the first load to be connected to the first phase L1 is 60 W, and the required power amount of the second load to be connected is 30 W and the third phase L3 to be connected to the second phase L2. It illustrates that the required power amount of the third load to be 0W.

Meanwhile, each of the energy storage devices 100a, 100b and 100c in the power supply system 20 of FIG. 6 is a single-phase energy storage device, and is electrically connected to each of the phases L1, L2 and L3. In the first phase L1, the second and third energy storage devices 100b, 100c are further electrically connected. That is, compared to the first phase L1, the first to third energy storage devices 100a, 100b, and 100c may be electrically connected in parallel to each other.

For the required amount of power of the first load 700a, the first to second energy storage devices 100a and 100b output 30 W of electric power as discharge power, respectively, and the third energy storage device 100c is 0 W. FIG. Power, that is, discharge power may not be output. As a result, the discharge power output from the energy storage device is not output to the system.

As described above, in a power supply system connected to a three-phase cell, a plurality of single-phase energy storage devices are electrically connected to one of the load-connected electrical loads of which the required power is large, so that a plurality of single-phase The electric power stored in the energy storage device can be discharged to the load.

7 to 8 are views for explaining the charge and discharge operation of the power supply system according to a second embodiment of the present invention.

The power supply system 30 of FIGS. 7 to 8 is similar to the power supply system 30 of FIG. 3, but the first and second energy storage devices 100a and 100b are disposed in the first phase L1. It is shown to be electrically connected. On the other hand, although not shown in the figure, it is also possible that an additional energy storage device is connected to each of the second phase L2 and the third phase L3.

First, FIG. 7 illustrates a charging operation in a plurality of single-phase energy storage devices 100a and 100b based on PV power from the solar module 200.

In the drawing, PV power is supplied to the first phase L1. For example, the case where the amount of power that can be stored in each of the single-phase energy storage devices 100a, 100b, and 100c is 30W, respectively, is illustrated when the solar power amount 90W is supplied to the first phase L1.

In the power supply system 30 of FIG. 7, the first to second energy storage devices 100a and 100b are electrically connected in parallel with each other, compared to the first phase L1.

As a result, 60W of the solar power amount 90W is distributed to the first to second energy storage devices 100a and 100b by 30W, respectively, so that they can be charged. And the remaining 30W can be output to the system.

As such, in the power supply system 30, which is connected to a three-phase cell, the solar power can be efficiently charged by electrically connecting a plurality of single-phase energy storage devices to any one to which solar power is supplied. It becomes possible.

Next, FIG. 8 illustrates the discharge operation in the plurality of single phase energy storage devices 100a and 100b based on the demand power of the respective loads 700a, 700b and 700c.

In the drawing, the required power amount of the first load to be connected to the first phase L1 is 60 W, and the required power amount of the second load to be connected is 30 W and the third phase L3 to be connected to the second phase L2. It illustrates that the required power amount of the third load to be 0W.

In the power supply system 30 of FIG. 8, since one load 700a, 700b, 700c is electrically connected to each of the phases L1, L2, and L3, the required power amount of the first load 700a is 60W. To this end, the first to second energy storage devices 100a and 100b may respectively output 30W of electric power as discharge power. On the other hand, for the required power amount 30W of the second load 700b, 30W of electric power is supplied from the canister.

As described above, in a power supply system connected to a three-phase cell, a plurality of single-phase energy storage devices are electrically connected to one of the load-connected electrical loads of which the required power is large, so that a plurality of single-phase The electric power stored in the energy storage device can be discharged to the load.

9 illustrates a power supply system according to a third embodiment of the present invention.

The power supply system 40 of FIG. 9, unlike the power supply systems 20, 30 of FIGS. 5 to 8, provides single phase inverters 210a, 210b, for supplying respective solar power to each phase. The difference is that 210c are connected.

Each of the single-phase inverters 210a, 210b and 210c may be supplied with the corresponding solar power from the solar modules 200a, 200b and 200c.

Thereby, the solar power outputted in each phase can be charged by the energy storage devices 100a, 100b and 100c of the single phase connected to each phase, and the power stored in the energy storage devices 100a, 100b and 100c, Each load 700a, 700b, 700c can be discharged.

On the other hand, unlike in Fig. 9, it is possible to connect the single phase inverters 210a and 210b to two of the three phases, respectively.

Meanwhile, unlike FIG. 9, similarly to FIG. 3, the first to third single phase inverters 210a, 210b, and 210c may be electrically connected in parallel to the first phase L1.

In addition, unlike FIG. 9, similarly to FIG. 7, in the first phase L1, the first to second single phase inverters 210a, 210b, and 210c may be electrically connected in parallel.

Meanwhile, in FIG. 3, the power management device 500 performs the power management control in the power supply system 20. However, the power management device 500 performs a plurality of energy storage devices 100a, 100b, and 100c. In a situation in which data communication is possible, the first energy storage device 100a operates as a master, and the other energy storage devices 100b and 100c operate as slaves. Thus, the master first energy storage device 100a may control power management in the power supply system 20 of FIG. 3, as well as the power supply systems 30 and 40 of FIGS. 7 and 8. Do.

In detail, the first energy storage device 100a receives power amount information from the power amount detectors 410a, 410b, and 410c, the system power amount detector 410d, and the integrated power amount detector 300, and based thereon. As a result, the total amount of surplus power generation may be determined, and the plurality of energy storage devices 100a, 100b and 100c may be controlled to not charge more than the total amount of surplus power generation.

As another example, even in the case of discharge, the first energy storage device 100a may grasp the required load of each phase and control the plurality of energy storage devices 100a, 100b, and 100c not to discharge excessive power. Can be.

The energy storage device and the power supply system having the same according to the present invention are not limited to the configuration and method of the embodiments described above, but the embodiments may be modified in various embodiments. All or some of these may optionally be combined.

On the other hand, the operation method of the energy storage device or the power management device of the present invention can be implemented as code that can be read by the processor in a processor-readable recording medium provided in the energy storage device or power management device. The processor-readable recording medium includes all kinds of recording devices that store data that can be read by the processor. Examples of the processor-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like, and may also be implemented in the form of a carrier wave such as transmission over the Internet. . The processor-readable recording medium can also be distributed over network coupled computer systems so that the processor-readable code is stored and executed in a distributed fashion.

In addition, while the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims (15)

In the power supply system for charging or discharging energy by using the three-phase AC power from the grid and the solar power generated by the solar module,
Loads electrically connected to each of the three phases;
A first phase energy storage device of a single phase type electrically connected to a first phase of the three phases;
A second energy storage device electrically connected to the first and second phases of the three phases and connected in parallel with the first energy storage device; And
And a first single-phase inverter electrically connected to the first phase and converting the DC power generated from the solar module into AC power to supply the first phase.
When the power is turned on, the first and second energy storage devices transmit a pairing request signal to a power management device, receive a pairing response signal including a radio channel allocation signal from the power management device, and pairing is completed. In this case, the power supply system, characterized in that for performing wireless data communication with the power management device through each assigned wireless channel. The method of claim 1,
When the first single-phase inverter supplies, on the first phase, power corresponding to a second amount of power that is greater than a first amount of power that can be stored in the first energy storage device,
And a power corresponding to at least a portion of the second amount of power is distributed and charged in the first energy storage device and the second energy storage device, respectively. The method of claim 1,
When the required power amount of the first load electrically connected to the first phase is greater than the first power amount that can be stored in the first energy storage device, the first energy storage device and the second energy in the first phase. And a storage device outputs power corresponding to the required amount of power of the first load on the first phase. The method of claim 1,
And a third energy storage device electrically connected to the first and third phases of the three phases and connected in parallel with the first and second energy storage devices. The method of claim 4,
When the first single-phase inverter supplies, on the first phase, power corresponding to a second amount of power that is greater than a first amount of power that can be stored in the first energy storage device,
And a power corresponding to at least a portion of the second power amount is respectively distributed and charged in the first to third energy storage devices. The method of claim 4,
When the required power amount of the first load electrically connected to the first phase is greater than the first power amount that can be stored in the first energy storage device, the first and second energy storage devices are connected to the first phase. And outputting power corresponding to a required amount of power of the first load on the first phase. The method of claim 6,
And when there is no required power amount of the load electrically connected to the third phase, the third energy storage device does not output power to the third phase. The method of claim 1,
And a second single-phase inverter electrically connected to the second phase and converting the DC power generated from the solar module into an AC power and supplying the second phase. . The method of claim 8,
And a third single-phase inverter electrically connected to a third phase of the three phases, converting the DC power generated from the solar module into AC power, and supplying the alternating current to the third phase. Supply system. The method of claim 1,
And a power amount detector for detecting an amount of power flowing in each phase of the three phases. The method of claim 1,
And a power management device configured to perform charge or discharge control in the first and second energy storage devices. The method according to claim 1 or 11, wherein
The first energy storage device,
At least one battery pack;
A communication module for receiving a charge command or a discharge command from the outside;
A connection unit configured to receive AC power supplied to the first phase based on the charge command or to output AC power based on the discharge command; And
Based on the charging command, when receiving AC power from the first phase and converting it into DC power, or receiving the discharge command, the DC power stored in the battery pack is converted into AC power based on the discharge command. A power supply system comprising a; power converter for converting. The method of claim 12,
The first energy storage device,
And a power socket connectable with the power plug. delete In the energy storage device for charging or discharging energy by using the single-phase AC power source from the first phase of the three-phase AC power source from the grid and the solar power generated in the solar module,
At least one battery pack;
A communication module for receiving a charge command or a discharge command from the outside;
A connection unit configured to receive AC power supplied to the first phase based on the charge command or to output AC power based on the discharge command; And
Based on the charging command, when receiving AC power from the first phase and converting it into DC power, or receiving the discharge command, the DC power stored in the battery pack is converted into AC power based on the discharge command. It includes; power conversion unit for converting,
When the power is turned on, the device transmits a pairing request signal to a power management device, receives a pairing response signal including a radio channel assignment signal from the power management device, and when pairing is completed, through the assigned wireless channel, An energy storage device that performs wireless data communication with the management device.

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