Energy storage device and energy storage system including the same
First Claim
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1. An energy storage device comprising:
- at least one battery pack;
a power conversion unit to convert, into DC power, AC power from a first phase from among three phases of an internal power network in a charging mode, and to convert the DC power stored in the at least one battery pack into the AC power in a discharging mode;
a communication module to exchange data with an external energy storage apparatus; and
a controller to control the power conversion unit,wherein the energy storage device is a first energy storage device that is connected to the first phase from among the three phases of the internal power network when a second energy storage device is connected to a second phase from among the three phases of the internal power network and when a third energy storage device is connected to a third phase from among the three phases of the internal power network,wherein the controller receives voltage information of respective phases, calculates discharged power amounts of the respective phases, based on the voltage information of the respective phases, and transmits information of the calculated discharged power amounts to the second and third energy storage devices, andwherein the controller controls an amount of power to be supplied to the first phase in the discharging mode based on the voltage information of the respective phases.
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Abstract
Discussed are an energy storage device and an energy storage system including the energy storage device. The energy storage device includes at least one battery pack, a power conversion unit to convert, into DC power, AC power from a first phase from among three phases of an internal power network in a charging mode of the energy storage device, and to convert the DC power stored in the at least one battery pack into the AC power in a discharging mode of the energy storage device, a communication module to exchange data with an external energy storage device, and a controller to control the power conversion unit.
27 Citations
19 Claims
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1. An energy storage device comprising:
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at least one battery pack; a power conversion unit to convert, into DC power, AC power from a first phase from among three phases of an internal power network in a charging mode, and to convert the DC power stored in the at least one battery pack into the AC power in a discharging mode; a communication module to exchange data with an external energy storage apparatus; and a controller to control the power conversion unit, wherein the energy storage device is a first energy storage device that is connected to the first phase from among the three phases of the internal power network when a second energy storage device is connected to a second phase from among the three phases of the internal power network and when a third energy storage device is connected to a third phase from among the three phases of the internal power network, wherein the controller receives voltage information of respective phases, calculates discharged power amounts of the respective phases, based on the voltage information of the respective phases, and transmits information of the calculated discharged power amounts to the second and third energy storage devices, and wherein the controller controls an amount of power to be supplied to the first phase in the discharging mode based on the voltage information of the respective phases. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An energy storage system comprising:
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a photovoltaic module comprising a solar cell module, and an AC power conversion module to convert DC power supplied from the solar cell module into AC power, and to supply the AC power to an internal power network; and a plurality of energy storage devices comprising a first energy storage device, a second energy storage device, and a third energy storage device, the first energy storage device comprising at least one battery pack, a power conversion unit to convert, into the DC power, the AC power from a first phase from among three phases of the internal power network in a charging mode, and to convert the DC power stored in the at least one battery pack into the AC power in a discharging mode, and a controller to control the power conversion unit, wherein the first energy storage device is connected to the first phase from among the three phases of the internal power network, wherein the second energy storage device connected to a second phase from among the three phases of the internal power network, wherein the third energy storage device connected to a third phase from among the three phases of the internal power network, wherein the controller receives voltage information of respective phases, calculates discharged power amounts of the respective phases based on the voltage information of the respective phases, and transmits information of the calculated discharged power amounts to the second and third energy storage devices, and wherein the controller controls an amount of power to be supplied to the first phase in the discharging mode based on the voltage information of the respective phases. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification