Lg Energy Solution, Ltd.

Lg Chem, Ltd

Bo Mi Lim

Won Tae Joe

Bom Jin Lee

Young Jin Kim

Yo Hwan Choi

A battery management apparatus can include a measuring unit configured to measure a voltage and a current of a battery cell, an analyzing unit configured to analyze correlations between a plurality of extraction methods for extracting a feature of the battery cell and an objective variable, and a determining unit configured to select at least one extraction method from among the plurality of extraction methods based on the correlations between the plurality of extraction methods and the objective variable.

Battery management apparatus and method

A method and a system for stabilizing battery cells of an energy storage system (ESS) to enable uniform charge/discharge without the generation of a state of charge (SOC) deviation among the battery cells by charging/discharging the plurality of battery cells included in a battery rack differently by module unit to minimize the deterioration and impact caused by intermittent charge/discharge.

Cell stabilizing method and system of energy storage system (ESS)

Provided is a battery management apparatus including a measuring unit measuring a current and a voltage of battery cells, an analyzing unit classifying the battery cells into a plurality of classes based on a feature obtained from the current and the voltage of the battery cells and a degradation behavior of each of the battery cells, and a determining unit determining a lifespan of the battery cells in a preset manner for each of the plurality of classes.

A battery diagnosis device includes a voltage measurement unit for measuring a voltage of a battery cell, a fitting value calculation unit for calculating a fitting voltage of the battery cell in a rest section after charging and discharging of the battery cell, and a diagnosis unit for diagnosing an abnormality of the battery cell by comparing the measured voltage measured by the voltage measurement unit and the fitting voltage calculated by the fitting value calculation unit, with respect to the rest section of the battery cell.

Device and method for diagnosing battery

An ESS capable of detecting a defective battery cell, the ESS in accordance with an exemplary embodiment, may include a plurality of battery cells, and a control unit for controlling the charge/discharge of the ESS, wherein the control unit includes an SOC calculation unit for calculating the SOC of the ESS, a voltage measurement unit for measuring the voltage of each of the plurality of battery cells, and a poor battery cell detection unit for detecting a defective battery cell from the voltages measured in the voltage measurement unit.

Device and method for detecting poor battery cell

A battery cell pass determination apparatus and a battery cell pass determination method involving verifying, after the battery cell is manufactured, whether the capacity of the battery cell repeatedly charged and discharged for a predetermined number of times satisfies a predetermined reference capacity, that is, determining whether a battery cell is a pass without having to charge and discharge a battery for 300 times, so that it is possible to quickly determine whether the battery cell is a pass.

Apparatus and method for determining whether battery cell has passed

There is provided an apparatus for diagnosing whether or not an error has occurred in battery cells, the apparatus including a voltage measurement circuit for measuring a voltage of a battery cell, a data processing circuit for calculating a target statistical value indicating a state of the battery cell based on a voltage measured by the voltage measurement circuit, and calculates a cumulative statistical value, and a diagnosis circuit that determines whether or not an error has occurred in the battery cell through a cumulative determination operation of comparing the cumulative statistical value with a cumulative reference value, and counts a number of times of cumulative error when it is determined that the error has occurred in the battery cell in the cumulative determination operation.

Apparatus and method for diagnosing battery

Provided is a method of calculating a resistance and a capacitance of an energy storage system, including a current application step of applying a predetermined current having a constant value to the energy storage system; a first voltage measurement step of measuring a voltage of the energy storage system while the predetermined current is applied to the energy storage system; a second voltage measurement step of measuring a voltage of the energy storage system after breaking the predetermined current applied to the energy storage system; and a step of calculating a resistance (R) and a capacitance (C) of the energy storage system based on the voltage of the energy storage system measured in the first voltage measurement step, the voltage of the energy storage system measured in the second voltage measurement step, and the predetermined current having the constant value.

Charge capacity calculation device and method for energy storage system

A state of charge (SOC) estimation method of a battery including: an SOC estimation device estimation mode checking step of checking an operation mode of an SOC estimation device; and an SOC estimation step of estimating an SOC of the battery according to an estimation mode of the SOC estimation device checked in the SOC estimation device operation mode checking step. The SOC estimation step estimates an SOC based on any one of an open circuit voltage during charging, an open circuit voltage during discharging, and an average open circuit voltage according to an estimation mode of the SOC estimation device.

Device and method for estimating SOC via open-circuit voltage of battery

A method of calculating the SOC of a battery in real time includes a battery parameter measurement operation for measuring current, voltage, temperature, and degradation degree of battery, and a real-time SOC calculation operation for calculating the SOC of the battery in real time based on the measured battery parameter. The real-time SOC calculation operation calculates the SOC of the battery in real time using an Extended Kalman Filter.

Apparatus and method for calculating state of charge of battery by reflecting noise

A method for estimating a state of charge of an energy storage system using a voltage modeling technique in which different parameters are used according to a charge/discharge state.

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Daejeon, South Korea

Bo Mi Lim