LS Industrial Systems

South Korea

LS Industrial Systems

South Korea
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Patent
LS Industrial Systems | Date: 2015-02-24

A system for charging a battery of an energy storage system using a photovoltaic inverter, includes: a photovoltaic inverter configured to convert a DC power generated from a photovoltaic module into an AC power, and to output the AC power; and an energy storage system configured to set a preset power value by considering an output power of the photovoltaic inverter according to the amount of solar radiation, and configured to charge a battery in a mode selected from a constant current (CC) mode and a constant voltage (CV) mode based on a comparison result obtained by comparing the preset power value, with an input power generated from the photovoltaic module and input from the photovoltaic inverter.

Claims which contain your search:

1. A system for charging a battery of an energy storage system using a photovoltaic inverter, the system comprising: a photovoltaic inverter configured to convert a DC power generated from a photovoltaic module into an AC power, and to output the AC power; and an energy storage system configured to set a preset power value by considering an output power of the photovoltaic inverter according to the amount of solar radiation, and configured to charge a battery in a mode selected from a constant current (CC) mode and a constant voltage (CV) mode based on a comparison result obtained by comparing the preset power value, with an input power generated from the photovoltaic module and input from the photovoltaic inverter, wherein the energy storage system includes: a current measuring unit configured to measure an input current; a voltage measuring unit configured to measure an input voltage; a controller configured to calculate an input power based on the input current and the input voltage measured by the current measuring unit and the voltage measuring unit, respectively, configured to compare the input power with the preset power value, and configured to output a charging control signal according to the CC mode when the input power is equal to or more than the preset power value, and configured to output a charging control signal according to the CV mode when the input power is less than the preset power value; and a charging unit configured to charge the battery, by supplying the input power provided from the photovoltaic inverter to the battery in the CC mode or in the CV mode, by the charging control signal generated from the controller.

2. The system of claim 1, wherein the controller is configured to charge the battery in a CV mode when the input power is increased as time lapses, and to charge the battery in a CC mode when the input power is equal to or more than the preset power value.

3. The system of claim 1, wherein the controller is configured to charge the battery in a CC mode when the input power is decreased as time lapses, and to charge the battery in a CV mode when the input power is less than the preset power value.

4. The system of claim 1, wherein the controller is configured to charge the battery in a CV mode when the input power is increased and decreased as time lapses, to charge the battery in a CC mode when the input power is equal to or more than the preset power value, and to charge the battery in a CV mode when the input power is less than the preset power value.


Patent
LS Industrial Systems | Date: 2015-10-30

An energy storage system includes: a plurality of slave power controllers connected to respective battery modules; and a master power controller configured to transmit a first signal to the plurality of slave power controllers and transmit a second signal for controlling synchronizations of the plurality of slave power controllers to the plurality of salve power controllers according to a reception time at which each of the plurality of salve power controllers receives the first signal.

Claims which contain your search:

1. An energy storage system comprising: a plurality of slave power controllers connected to respective battery modules; and a master power controller configured to transmit a first signal to the plurality of slave power controllers and transmit a second signal for controlling synchronizations of the plurality of slave power controllers to the plurality of salve power controllers according to a reception time at which each of the plurality of salve power controllers receives the first signal.

11. The system according to claim 1, wherein the plurality of slave power controllers simultaneously control all batteries connected to the plurality of slave power controllers in response to the second signal.

20. The method according to claim 14, further comprising simultaneously controlling, by the plurality of slave power controllers, all battery modules connected to the plurality of slave power controllers in response to the second signal.

14. An energy storage system synchronizing method comprising, when a first signal is received by a plurality of slave power controllers, measuring a reception time at which each of the plurality of slave power controllers receives the first signal; and receiving, by the plurality of salve power controllers, a second signal for controlling synchronizations of the plurality of slave power controllers on the basis of the reception time.


Patent
LS Industrial Systems | Date: 2016-02-02

An energy storage system including a plurality of loads each converting direct current (DC) power stored in a battery thereof into alternating current (AC) power and outputting the AC power, a plurality of slave power controllers detecting zero crossing points of AC voltage signals output from one of the plurality of loads and controlling the plurality of loads in accordance with a control signal received from a master power controller, and the master power controller controlling the plurality of slave power controllers so as to control the plurality of loads in accordance with the control signal received from the master power controller after a preset time has lapsed since the detected zero crossing point.

Claims which contain your search:

1. An energy storage system comprising: a plurality of loads each converting direct current (DC) power stored in a battery thereof into alternating current (AC) power and outputting the AC power; a plurality of slave power controllers detecting zero crossing points of AC voltage signals output from one of the plurality of loads and controlling the plurality of loads in accordance with a control signal received from a master power controller; and the master power controller controlling the plurality of slave power controllers so as to control the plurality of loads in accordance with the control signal received from the master power controller after a preset time has lapsed since the detected zero crossing point.

2. The energy storage system of claim 1, wherein the plurality of slave power controller are synchronized based on the zero crossing points of the AC voltage signals output from the plurality of loads.

3. The energy storage system of claim 1, wherein the preset time is 90, 180, 270, or 360.

4. The energy storage system of claim 1, wherein the plurality of slave power controllers output Pulse Width Modulation (PWM) signals to the plurality of loads in accordance with the control signal received from the master power controller.

5. The energy storage system of claim 1, wherein the plurality of slave power controllers periodically detect the zero crossing points.

6. The energy storage system of claim 5, wherein the plurality of slave power controllers comprise a Central Processing Unit (CPU) which detects a period of time which has lapsed since the detection of the zero crossing points.

7. The energy storage system of claim 6, wherein the CPU periodically transmits the periodically detected zero crossing points to the master power controller.

8. The energy storage system of claim 7, wherein the master power controller periodically outputs the control signal based on the periodically transmitted zero crossing points.


A system (100) for charging a battery of an energy storage system using a photovoltaic inverter (120), includes: a photovoltaic inverter configured to convert a DC power generated from a photovoltaic module (110) into an AC power, and to output the AC power; and an energy storage system (130) configured to set a preset power value by considering an output power of the photovoltaic inverter according to the amount of solar radiation, and configured to charge a battery in a mode selected from a constant current (CC) mode and a constant voltage (CV) mode based on a comparison result obtained by comparing the preset power value, with an input power generated from the photovoltaic module and input from the photovoltaic inverter.

Claims which contain your search:

1. A system for charging a battery of an energy storage system using a photovoltaic inverter, the system comprising:a photovoltaic inverter (120) configured to convert a DC power generated from a photovoltaic module (110) into an AC power, and to output the AC power; andan energy storage system (130) configured to set a preset power value by considering an output power of the photovoltaic inverter (120) according to the amount of solar radiation, and configured to charge a battery (132) in a mode selected from a constant current (CC) mode and a constant voltage (CV) mode based on a comparison result obtained by comparing the preset power value, with an input power generated from the photovoltaic module (110) and input from the photovoltaic inverter (120),wherein the energy storage system (130) includes:a current measuring unit (137) configured to measure an input current;a voltage measuring unit (136) configured to measure an input voltage;a controller (135) configured to calculate an input power based on the input current and the input voltage measured by the current measuring unit (137) and the voltage measuring unit (136), respectively, configured to compare the input power with the preset power value, and configured to output a charging control signal according to the CC mode when the input power is equal to or more than the preset power value, and configured to output a charging control signal according to the CV mode when the input power is less than the preset power value; anda charging unit (131) configured to charge the battery (132), by supplying power input from the photovoltaic inverter (120) to the battery (132) in the CC mode or in the CV mode, by the charging control signal generated from the controller (135).

2. The system of claim 1, wherein the controller (135) is configured to charge the battery (132) in a CV mode when the input power is increased as time lapses, and to charge the battery (132) in a CC mode when the input power is equal to or more than the preset power value.

3. The system of claim 1, wherein the controller (135) is configured to charge the battery (132) in a CC mode when the input power is decreased as time lapses, and to charge the battery (132) in a CV mode when the input power is less than the preset power value.

4. The system of claim 1, wherein the controller (135) is configured to charge the battery (132) in a CV mode when the input power is increased and decreased as time lapses, to charge the battery (132) in a CC mode when the input power is equal to or more than the preset power value, and to charge the battery (132) in a CV mode when the input power is less than the preset power value.


Patent
LS Industrial Systems | Date: 2015-12-31

A power supply system includes: an electricity generation device configured to generate electrical energy; a plurality of DC/AC converters configured to convert the electrical energy into AC; and a battery energy storage system (BESS) configured to receive and charge the electrical energy and supplies the electrical energy to the plurality of DC/AC converters by discharging the charged electrical energy. The electrical energy generated by the electricity generation device charges the BESS without going through the plurality of DC/AC converters.

Claims which contain your search:

1. A power supply system comprising: an electricity generation device configured to generate electrical energy; a plurality of DC/AC converters configured to convert the electrical energy into AC; and a battery energy storage system (BESS) configured to receive and charge the electrical energy and supplies the electrical energy to the plurality of DC/AC converters by discharging the charged electrical energy, wherein the electrical energy generated by the electricity generation device charges the BESS without going through the plurality of DC/AC converters.

7. The power supply system according to claim 1, further comprising a DC/DC converter configured to convert a voltage size of electrical energy for charging the battery energy system as connected to the BESS.


Patent
LS Industrial Systems | Date: 2015-11-30

An energy storage system is provided. The energy storage system including a battery includes a battery management system (BMS) monitoring a battery state of the battery and controlling charging and discharging operations of the battery; and a power condition system (PCS) determining a desired control value of the battery, obtaining power market adjustment rule information on a power market including the energy storage system, calculating a deadband value for the desired control value based on the obtained power market adjustment rule information, and controlling the BMS controlling the charging and discharging operations of the battery based on the calculated deadband value for the desired control value and the monitored battery state.

Claims which contain your search:

1. An energy storage system comprising a battery, the energy storage system comprising: a battery management system (BMS) monitoring a battery state of the battery and controlling charging and discharging operations of the battery; and a power condition system (PCS) determining a desired control value of the battery, obtaining power market adjustment rule information on a power market comprising the energy storage system, calculating a deadband value for the desired control value based on the obtained power market adjustment rule information, and controlling the BMS controlling the charging and discharging operations of the battery based on the calculated deadband value for the desired control value and the monitored battery state.

2. The energy storage system according to claim 1, wherein the MBS monitors one or more of a voltage, current, temperature, remaining amount of power, lifespan, and state of charge (SOC) of the battery.

3. The energy storage system according to claim 1, wherein the battery state information comprises the SOC level information on the battery, and the BMS enables the SOC level to be maintained within the calculated deadband value.

4. The energy storage system according to claim 1, wherein the PCS calculates a plurality of deadband values, a first deadband value and a second deadband value that have a same difference from the calculated desired control value, based on the obtained power market adjustment rule information.

5. The energy storage system according to claim 1, wherein the PCS calculates a plurality of deadband values, a third deadband value and a fourth deadband value that have different differences from the calculated desired control value, based on the obtained power market adjustment rule information.

6. The energy storage system according to claim 1, wherein the PCS calculates the calculated deadband value as a frequency value corresponding to frequency control for the energy storage system.


Patent
LS Industrial Systems | Date: 2015-12-31

Provided is a Battery Energy Storage System (BESS) management device for managing a BESS for receiving and charging electrical energy and supplying the electrical energy to a DC/AC converter by discharging the charged electrical energy in a power supply system. The BESS management device includes a measurement unit configured to measure State of Charges (SOCs) of a plurality of series-connected modules or cells in the BESS and a DC power supply unit configured to supply DC power to one of the plurality of modules or one of the plurality of cells on the basis of the SOCs of the plurality of modules or cells.

Claims which contain your search:

1. A Battery Energy Storage System (BESS) management device for managing a BESS for receiving and charging electrical energy and supplying the electrical energy to a DC/AC converter by discharging the charged electrical energy in a power supply system, the BESS management device comprising: a measurement unit configured to measure State of Charges (SOCs) of a plurality of series-connected modules or cells in the BESS; and a DC power supply unit configured to supply DC power to one of the plurality of modules or one of the plurality of cells on the basis of the SOCs of the plurality of modules or cells.

11. A BESS management method for management a BESS for receiving and charging electrical energy and discharging the charged electrical energy in a power supply system, the BESS management device comprising: measuring State of Charges (SOCs) of a plurality of series-connected modules or cells in the BESS; and supplying DC power to one of the plurality of modules or one of the plurality of cells on the basis of the SOCs of the plurality of modules or cells.


A method of charging and discharging battery energy storage device is provided. The method includes measuring a voltage and a frequency of a grid, measuring a state of charge (SOC) value of a battery, calculating an SOC offset value and an SOC feedback gain value from the measured SOC value of the battery, and performing a voltage droop control based on the voltage of the grid and a frequency droop control on the basis of the frequency of the grid, the SOC offset value and the SOC feedback gain value and controlling charging and discharging of the battery.

Claims which contain your search:

1. A method of charging and discharging battery energy storage device, comprising: measuring a voltage and a frequency of a grid; measuring a state of charge (SOC) value of a battery; calculating an SOC offset value and an SOC feedback gain value from the measured SOC value of the battery; and performing a voltage droop control based on the voltage of the grid and a frequency droop control on the basis of the frequency of the grid, the SOC offset value and the SOC feedback gain value and controlling charging and discharging of the battery.

10. A battery energy storage device comprising: a battery; a data storage unit storing data necessary for a voltage droop control and a frequency droop control for the battery; an SOC measuring unit measuring an SOC value of the battery; a grid voltage and frequency measuring unit measuring a voltage and a frequency of the grid; a charging and discharging control unit performing the voltage droop control and frequency droop control corresponding to the voltage and frequency of the grid by using the data stored in the data storage unit, and an SOC offset value and an SOC feedback gain value of the battery, which are calculated on the basis of the SOC value, and outputting a control signal for performing charging and discharging on the battery while preventing overcharging and over-discharging at the time of charging and discharging the battery; and a charging and discharging unit charging or discharging the battery according to the control signal for performing charging and discharging of the charging and discharging control unit.

11. The battery energy storage device according to claim 10, wherein the data storage unit stores a voltage droop control coefficient, a frequency droop control coefficient, a reference SOC value of the battery, a reference voltage value of the grid, a reference frequency value of the grid, a target power value of the grid.


Patent
LS Industrial Systems | Date: 2014-03-17

Provided is an energy storage system including: a battery device that is configured from multiple battery unit modules; and a power converting system that is configured to be connected to the battery device and that converts electric power that is applied between an electric power system and the battery device, in which the battery device includes multiple switches, each of which establishes a connection between each of the battery unit modules and the power converting system.

Claims which contain your search:

1. A battery device comprising: a case; an electric power terminal that is configured to be formed on one side of the case; multiple unit module mounting portions, which are configured to be formed within the case and each of which is configured to accommodate a battery unit module; and multiple switch mounting portions, each of which is configured to be formed between the electric power terminal and each of the multiple unit module mounting portions and within each of which a switch establishing a connection between the electric power terminal and each of the unit module mounting portions is arranged.

2. The battery device of claim 1, wherein the switch that is arranged within each of the multiple switch mounting portions is formed between the electric power terminal and a specific corresponding unit module mounting portion and connects or disconnect lines over which electric power is transmitted and received between the electric power terminal and the specific unit module mounting portion.

3. The battery device of claim 1, further comprising: at least one communication module mounting portion that is formed within the case and that is configured to accommodate a communication module; and a communication terminal that is formed within the case and that is configured to be connected to the communication module mounting portion.

4. The battery device of claim 3, wherein the communication module mounting portion is connected to each of the multiple unit module mounting portions and thus forms a communication path.

5. The battery device of claim 1, wherein the battery unit module is detachable from the unit module mounting portion.

6. An energy storage system comprising: a battery device that is configured from multiple battery unit modules; and a power converting system that is configured to be connected to the battery device and that converts electric power that is applied between an electric power system and the battery device, wherein the battery device includes multiple switches, each of which establishes a connection between each of the battery unit modules and the power converting system.

7. The energy storage system of claim 6, wherein the battery device is configured to be connected to the multiple battery unit modules and includes a communication module that obtains battery-status information on each of the battery unit modules and transmits the obtained status information to the outside.

8. The energy storage system of claim 7, wherein the power converting system receives the battery-status information on each of the battery unit modules that is obtained through the communication module and controls switched states of the multiple switches, based on the battery-status information.

9. The energy storage system of claim 8, wherein the power converting system controls the switch that is connected to the battery unit module in which a sign of disorder occurs, among the multiple battery unit modules, in such a manner as to open the switch.

10. The energy storage system of claim 6, wherein the multiple battery unit modules that make up the battery device are separated, by partitions, from one another.


Patent
LS Industrial Systems | Date: 2015-12-03

Disclosed is a power supply system. A power supply system according to an embodiment includes a charging control unit configured to control charging/discharging of a battery energy storage system, and a system control unit configured to receive an electric energy amount output from the battery energy storage system, determine an amount of electric energy to be distributed to each of a plurality of charging control units on the basis of the received electric energy amount and rated outputs of the charging control units, and control the charging control units in parallel on the basis of a result of the determining.

Claims which contain your search:

1. A method for controlling a power supply system comprising a battery power supply system, the method comprising: receiving an electric energy amount output from a battery energy storage system; determining an amount of electric energy to be distributed to each of a plurality of charging control units on the basis of the received electric energy amount and rated outputs of the charging control units; and controlling the charging control units in parallel on the basis of a result of the determining, wherein the determining the amount of electric energy to be distributed comprises determining the amount of electric energy to be distributed in consideration of at least one of information on a time of input to the power supply system, weather information, or remaining battery capacity information together with the rated outputs.

2. The method according to claim 1, wherein the amount of electric energy to be distributed to each charging control unit is determined according to a level of the rated output of each charging control unit.

4. A power supply system comprising a battery power supply system comprising: a charging control unit configured to control charging/discharging of a battery energy storage system; and a system control unit configured to receive an electric energy amount output from the battery energy storage system, determine an amount of electric energy to be distributed to each of a plurality of charging control units on the basis of the received electric energy amount and rated outputs of the charging control units, and control the charging control units in parallel on the basis of a result of the determining.

5. The power supply system according to claim 4, wherein the system control unit determines the amount of electric energy to be distributed to each charging control unit according to a level of the rated output of each charging control unit.

7. The power supply system according to claim 4, wherein the system control unit determines the amount of electric energy to be distributed to each charging control unit in consideration of at least one of information on a time of input to the power supply system, weather information, or remaining battery capacity information together with the rated outputs.

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