Lg Chem, Ltd

Lg Energy Solution, Ltd.

Sung-Yul Yoon

Young-Bo Cho

Ki-Woong Kim

Seung-hyun Kim

Dong-Keun Kwon

Hyun-Chul Lee

Gyong-Jin Oh

An-Soo Kim

Myung-Hyun Shim

Won-Kyung Kim

Jae-Sung Im

Won-Bin Choi

Jeong-Seok Park

Jeong-Bin Lee

A battery management apparatus according to the present disclosure includes a voltage measurement circuit to measure a cell voltage of each of a plurality of battery cells; and a control unit to determine the cell voltage of each of the plurality of battery cells and a reference voltage of the plurality of battery cells at a preset time interval during a rest period. The control unit determines a first accumulated change of the cell voltage of each battery cell during the rest period. The control unit determines a second accumulated change of the reference voltage during the rest period. The control unit determines whether each battery cell is defective by comparing the first accumulated change of each battery cell with the second accumulated change.

Battery management apparatus, battery pack, battery system, and battery management method

A battery diagnosis apparatus according to the present disclosure includes a voltage measurer for measuring a cell voltage of each of first to nbattery cells and a processor, wherein n is a natural number of 2 or greater. The processor determines an average cell voltage of each battery cell for a first rest period from a first time point to a second time point, based on the cell voltage of each battery cell measured a first number of times for the first rest period, determines an average cell voltage of each battery cell for a second rest period and diagnoses a fault of each battery cell based on the average cell voltage of each battery cell for the first rest period and the average cell voltage of each battery cell for the second rest period.

Battery diagnosis apparatus, battery diagnosis method and energy storage system

Disclosed is an apparatus for efficiently managing a battery system in a situation where a charge or discharge power varies with time. The apparatus for managing a battery system includes a power measuring unit configured to measure the magnitude of a charge power supplied to a battery system or a discharge power output from the battery system, a reference setting unit configured to variably set a power distribution reference according to the measured magnitude of power, and a power distributing unit configured to distribute and supply a charge power to battery units having different outputs and capacities according to the set power distribution reference or allow a discharge power to be distributed and output from battery units having different outputs and capacities according to the set power distribution reference.

Apparatus and method for managing battery system

The present disclosure relates to an open circuit voltage estimating apparatus capable of estimating an open circuit voltage even when a battery cell does not have a rest time. The open circuit voltage estimating apparatus according to an embodiment of the present disclosure includes a current measuring unit configured to measure a charge/discharge current of a battery cell; a current integrating unit configured to integrate the current measured by the current measuring unit starting from an initial time; a time calculating unit configured to calculate a critical time, that is a time in which the integrated current value integrated by the current integrating unit is within a critical range; a cell voltage measuring unit configured to measure a voltage of the battery cell; and an open circuit voltage estimating unit configured to estimate an open circuit voltage of the battery cell by calculating an average value of the voltage measured by the cell voltage measuring unit during an operation time starting from the initial time to the critical time.

Apparatus and method for estimating open circuit voltage

Growing community of inventors

Daejeon, South Korea

Sung-Yul Yoon