Abstract: An energy storage system and a starting method thereof are disclosed. In one aspect, the energy storage system includes a battery system, a direct current (DC) contactor and a power supply. The battery system includes at least one battery rack, wherein the battery rack is configured to provide first power. The DC contactor electrically connects a current path between the battery system and a power conversion system. The power supply is electrically connected to the DC contactor. In the energy storage system, the DC contactor is configured to be turned on based on at least the first power.

Abstract: A battery system comprising a battery management system (BMS) is disclosed. The BMS has a hierarchical structure including an upper layer master BMS and a lower layer slave BMS. The master transmits a request signal to the slave wirelessly, and the slave transmits a response signal based on the request signal wirelessly to the master.

Abstract: An energy storage system and a starting method thereof are disclosed. In one aspect, the energy storage system includes a battery system, a direct current (DC) contactor and a power supply. The battery system includes at least one battery rack, wherein the battery rack is configured to provide first power. The DC contactor electrically connects a current path between the battery system and a power conversion system. The power supply is electrically connected to the DC contactor. In the energy storage system, the DC contactor is configured to be turned on based on at least the first power.

Abstract: An apparatus for reporting fault information of a battery of a power storage system includes a receiving portion configured to receive state information of the battery from a battery management system of the power storage system, a controller configured to produce fault information of the battery from the state information of the battery received by the receiving portion by comparing the state information of the battery with a prestored reference value; and a display configured to display the fault information produced by the controller, wherein the receiving portion and the controller are positioned inside a storage space with the power storage system, and the display is outside of the storage space.

Abstract: A battery system comprising a battery management system (BMS) is disclosed. The BMS has a hierarchical structure including an upper layer master BMS and a lower layer slave BMS. The master transmits a request signal to the slave wirelessly, and the slave transmits a response signal based on the request signal wirelessly to the master.

Abstract: An apparatus for reporting fault information of a battery of a power storage system includes a receiving portion configured to receive state information of the battery from a battery management system of the power storage system, a controller configured to produce fault information of the battery from the state information of the battery received by the receiving portion by comparing the state information of the battery with a prestored reference value; and a display configured to display the fault information produced by the controller, wherein the receiving portion and the controller are positioned inside a storage space with the power storage system, and the display is outside of the storage space.