Lg Energy Solution, Ltd.

Yang-Soo An

Yong-Chul Sung

Sang-Jin Lee

Gyu-Yeol Lee

Dae-Gon Jeon

A battery diagnosis apparatus for diagnosis of a cell group including a plurality of battery cells connected in series, includes a voltage sensing circuit configured to periodically generate a voltage signal indicating a cell voltage of each battery cell, and a control circuit configured to generate time series data indicating a change in cell voltage of each battery cell over time based on the voltage signal. The control circuit is configured to (i) determine a first average cell voltage and a second average cell voltage of each battery cell based on the time series data, wherein the first average cell voltage is a short term moving average, and the second average cell voltage is a long term moving average, and (ii) detect an abnormal voltage of each battery cell based on a difference between the first average cell voltage and the second average cell voltage.

Battery diagnosis apparatus, battery diagnosis method, battery pack, and vehicle

A battery diagnosing apparatus includes a voltage measuring unit configured to measure a voltage of each of a plurality of battery cells included in a battery module at every voltage measurement cycled and a control unit configured to obtain a voltage value for the plurality of battery cells from the voltage measuring unit at every voltage measurement cycle, calculate a voltage change amount between the plurality of obtained voltage values for the plurality of battery cells, calculate a voltage change rate between the plurality of calculated voltage change amounts at every diagnosis cycle different from the voltage measurement cycle, and diagnose the battery module based on one or more voltage change rates calculated up to a current diagnosis cycle and a preset criterion change rate.

Battery diagnosing apparatus and method

The present disclosure relates to a field-effect transistor (FET) controlling apparatus and method for accurately, controlling an operation state of a FET by adaptively adjusting a voltage applied to the FET to correspond to a voltage of a source terminal of the FET. The voltage applied to the gate terminal of the FET may be adaptively controlled according to the voltage of the source terminal using a capacitor. Therefore, even when the source terminal is not connected to the ground but connected to an external load, there is an advantage that the operation state of the FET may be smoothly and accurately controlled. In addition, there is an advantage that a voltage within a certain range may be applied to the gate terminal of the FET.

FET controlling apparatus and method

A battery control system includes first to third signal paths, and first to nbattery controllers. When a high level voltage is inputted through the second signal path, the first battery controller sets an ID of the first battery controller based on ID information collected through the first signal path and outputs the high level voltage to the second signal path. Where i is a natural number of 2˜n, when the high level voltage outputted by the i−1battery controller is inputted through the second signal path, the ibattery controller sets an ID of the ibattery controller and outputs the high level voltage to the second signal path. When the high level voltage is outputted to the third signal path by the nbattery controller, each battery controller outputs a response signal to the first signal path.

Battery control system, battery pack, electric vehicle, and id setting method for the battery control system

A battery management apparatus for monitoring a state of a bus bar installed to an input and output terminal of a battery pack. A failure of the bus bar installed to the input and output terminal of the battery pack may be suitably diagnosed.

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Daejeon, South Korea

Yang-Soo An