BATTERY ENERGY STORAGE SYSTEM WITH ARC FLASH PROTECTION, ENERGY CONVERSION SYSTEM AND PROTECTION METHOD

摘要

The battery energy storage system (1) comprising a rechargeable battery assembly (3) and a protection system (19) including a n arc flash protection device (26, 26�). The arc flash protection device (26, 26�) comprises an overcurrent protection unit (32) which detects overcurrent conditions indicating arc flash conditions in case of a low impedance of the battery assembly (3) and an undervoltage protection unit (33) which detects undervoltage conditions indicating arc flash conditions in case of a low impedance of the battery assembly (3), wherein upon detecting the overcurrent conditions and/or the undervoltage conditions for a predetermined minimum time period, the arc flash protection device (26, 26�) initiates protective measures to prevent further operation of the battery assembly (3). An energy conversion system (34) comprising such a battery energy storage system (1), which can be used for stationary and mobile energy supply or distribution applications, is also disclosed. FIG.1