Battery system and energy storage system including the same

摘要

A battery system including a stably operating battery management unit and an energy storage system including the battery system is disclosed. The battery system includes a battery rack configured to store and provide power, a rack protection circuit configured to selectively connect and disconnect the battery rack to and from the input/output terminal, and a rack battery management system (BMS) configured to communicate with the battery rack and with the rack protection circuit. The rack BMS receives data from the battery rack and generates control signals for the rack protection circuit. In addition, the rack protection circuit includes a current path between the battery rack and the input/output terminal, and the rack BMS is excluded from the current path.

主权项

1. A battery system, comprising:
a battery rack configured to provide power to an input/output terminal of the battery system and to store power from the input/output terminal of the battery system, the battery system including a positive input/output terminal and a negative input/output terminal; a rack protection circuit connected to the battery rack, wherein the rack protection circuit is configured to selectively connect and disconnect the battery rack to and from the positive and negative input/output terminals of the battery system, wherein connecting and disconnecting the battery rack from the positive input/output terminal of the battery system is unrelated to connecting and disconnecting the battery rack from the negative input/output terminal of the battery system; and a rack battery management system (BMS) connected directly to the battery rack and configured to communicate with the battery rack over a single communication path and with the rack protection circuit, wherein the rack BMS is configured to receive data from the battery rack and to generate control signals for the rack protection circuit and for the battery rack, wherein the rack protection circuit comprises a current path between the battery rack and the input/output terminals of the battery system, and wherein the rack BMS is excluded from the current path.