Patent ID: 8654495
Filing Date: 2014-02-18
Classification: H02J,Y02E

Abstract:
1. An energy storage system comprising: a control unit; a battery stack including a plurality of battery units, the battery units electrically connected in series, and each battery unit having at least one semiconductor switch and at least one battery module including a plurality of battery cells; wherein each battery module is connected in series with a respective semiconductor switch, and the control unit is operatively connected to the at least one semiconductor switch and adapted to control the at least one semiconductor switch of every battery unit; wherein the control unit includes a current monitor for monitoring the current through each battery module of at least one battery unit, and disconnects the battery module if the monitored current is above a short circuit threshold; wherein the control unit disconnects the battery cell by activating the semiconductor switch; and wherein the control unit disconnects all battery modules of every battery unit of the battery stack simultaneously.