Lg Chem, Ltd

Lg Energy Solution, Ltd.

Tae Shin Cho

Jong Min Park

Sung Yul Yoon

Young Bo Cho

Chan Min Park

Jeong Seok Park

Kil Won Lee

Dong Hoe Kim

The present invention relates to a battery energy storage system including: a plurality of battery boxes provided with a plurality of battery packs; a plurality of power converter systems respectively connected to the plurality of battery boxes to selectively charge or discharge the plurality of battery boxes through alternating current supplied from an external power source device; a transformer disposed between the external power source device and the plurality of power converter systems; and a controller controlling the plurality of power converter systems to selectively charge or discharge the plurality of battery boxes.

Charging/discharging of battery energy storage system using 3-phase transformer

Provided are system and method for correcting a state-of-charging (SOC) of a battery. The system for correcting the SOC of the battery includes an SOC measuring unit measuring an SOC value of the battery, a storage unit storing preset operation ranges to determine whether charging/discharging of the battery is compensated, a determining unit determining an operation range corresponding to the SOC value of the battery among the preset operation ranges, and an SOC correcting unit adjusting a dead band in charging/discharging directions or charging/discharging power according to the result determined in the determining unit to correct the SOC value of the battery.

System and method for correcting SOC of battery

Growing community of inventors

Daejeon, South Korea

Tae Shin Cho