Samsung Sdi Co., Inc.

Loo-Ney Choi

Yusai Murakami

Ki-Ho Seo

A battery management system according to an exemplary embodiment of the present invention includes: a current measuring unit for sampling a charge current and a discharge current of a battery; a charge and discharge amount calculator for calculating a charge and discharge amount corresponding to a difference between the sampled charge current and the sampled discharge current; a polarization voltage calculator for calculating a polarization voltage corresponding to the charge and discharge amount and a temperature of the battery; and a pulse generator for applying a polarization voltage reset pulse for the battery to remove the polarization voltage.

Battery management system, method of removing polarization voltage of battery, and estimating state of charge of battery

A grid-connected energy storage system capable of increasing the efficiency of a converter and a method of controlling the system are disclosed. In one aspect, the system includes a plurality of converters for converting power generated by each of the plurality of power generation modules into DC power at a voltage level, a plurality of series switches connected to the plurality of power generation modules, and a plurality of parallel switches configured to selectively connect each of the power generation modules to each and every other of the power generation modules. The system also includes a controller configured to control the switches in order to selectively connect each of the power generation modules to at least one selected converter.

Growing community of inventors

Yongin-si, South Korea

Loo-Ney Choi