Lg Chem, Ltd

Lg Energy Solution, Ltd.

Hyunchul Lee

Jongmin Park

Mi So Park

Jin Seok Heo

Kiwook Jang

Jongbum Lee

Jongkook Lee

The present invention relates to an apparatus and a method for estimating a state of a battery, and more particularly, an apparatus for estimating a state of a battery includes: a first SOC estimating unit estimating a first state of charging (SOC) of the battery based on open circuit voltage and a temperature of the battery; a first SOH estimating unit estimating a first state of health of the battery based on the first SOC and the current of the battery; and a second SOC estimating unit estimating a second SOC of the battery based on the first SOH, charging/discharging voltage, the temperature, and the current of the battery or estimating the second SOC of the battery based on the charging/discharging voltage, the temperature, and the current of the battery.

Device and method for estimating state of battery

Disclosed are an apparatus and a method for sensing opening of a current interrupt device (CID) of a battery unit. An apparatus for sensing opening of a current interrupt device of a battery unit according to the present invention is configured to include: a setting unit setting a predetermined voltage section when discharge of one or more battery units starts; a measuring unit measuring a voltage section pass time which is the time when the one or more battery units pass through the predetermined voltage section for each battery unit; and a detecting unit detecting a battery unit in which the current interrupt device (CID) is opened among the one or more battery units and detecting the number of battery cells in which the CID is opened among one or more battery cells included in the battery unit in which the CID is opened based on the voltage section pass time for each battery unit.

Apparatus and method for sensing opening of current interrupt device of battery unit

Disclosed is a technology for detecting an erroneous operation of a task scheduler of a battery management system. An apparatus for detecting an erroneous operation according to an exemplary embodiment includes: a first scheduler module configured to control a first task to be executed for every first period; a second scheduler module configured to control a second task to be executed for every second period; a task counting unit configured to increase the first counting value for the first scheduler module in accordance with the first period whenever the first task is executed, and increase the second counting value for the second scheduler module in accordance with the second period whenever the second task is executed; and an erroneous operation detecting unit configured to detect erroneous operations of the first scheduler module and the second scheduler module based on the first counting value and the second counting value.

Apparatus and method for detecting malfunction of task scheduler in battery management system

A method of balancing rack voltages of a battery pack having a plurality of racks includes (a) a voltage measurement step of measuring voltages of the racks, (b) a sorting step of sorting the racks in ascending powers based on the voltage values of the racks, (c) a comparison step of comparing a difference between a maximum voltage value and a minimum voltage value with a set voltage, (d) a charging/discharging count step of comparing the voltage values of the racks with a reference voltage to increase a charging or discharging count, and (e) a charging/discharging step of charging or discharging the racks according to the charging or discharging count. In a case in which, at step (c), the difference between the maximum voltage value and the minimum voltage value is lower than the set voltage, the racks are charged with the maximum voltage value without steps (d) and (c).

Method of balancing rack voltages of battery pack including racks

Disclosed are a terminating resistance generation device for differential input mode communication and a differential input mode communication device. The terminating resistance generation device for differential input mode communication according to the present invention includes: a first circuit unit including a first ground terminal and operating only when the first ground terminal is connected to a ground; a second circuit unit including a second ground terminal and operating only when the second ground terminal is connected to the ground; and a terminating resistance generating unit generating terminating resistance when one of the first ground terminal and the second ground terminal is not connected, and as a result, only one of the first circuit unit and the second circuit unit operates.

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Daejeon, South Korea

Hyunchul Lee