Lg Chem, Ltd

Lg Energy Solution, Ltd.

Cheol-Taek Kim

Sun-Jong Lee

Kyu-Ha Park

Ju-Young Kim

Jung-Soo Kang

Chang-Gi Jung

Yong-Chul Sung

Young-Min Kim

Jee-Soon Choi

Do-Youn Kim

Sang-Jin Lee

Ki-Hoon Kim

Kyu-Chul Lee

Young-Jun Ko

Ji-Yong Kim

Han-Gon Park

Bo-Kyun Lee

Chang-Yong Song

Tae-Hyeok Jang

Disclosed is a battery cell diagnosing apparatus, which includes at least one sensor; and a first control unit configured to obtain data including at least one of voltage, current or temperature of a battery cell from the at least one sensor, obtain first diagnostic information based on the obtained data, transmit the data to an external device, receive second diagnostic information of the battery cell based on the data from the external device, and diagnose an abnormal state of the battery cell based on at least one of the first diagnostic information and the second diagnostic information.

Battery cell diagnosing apparatus and method

A battery diagnosis apparatus according to the present disclosure is directed to providing a battery diagnosis apparatus, a battery pack, an electric vehicle and a battery diagnosis method for diagnosing anomalies in a single battery cell or each of a plurality of battery cells connected in series using time-dependent changes in cell voltage of each battery cell without a process of comparing the cell voltage of each battery cell with the cell voltage of other battery cell(s).

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

A battery management system includes a sensing circuit to acquire a state parameter of each of a plurality of battery cells connected in series; and a control circuit to determine, for each battery cell, a first state of charge (SOC) change which is a difference between a first SOC at a first charge time and a second SOC at a second charge time by applying a SOC estimation algorithm to the state parameter acquired during charging. The control circuit determines a reference factor by applying a statistical algorithm to the first SOC changes of at least two of the plurality of battery cells. The control circuit detects an internal short circuit fault in each battery cell based on the first SOC change of each battery cell and the reference factor.

Battery management system, battery pack, electric vehicle and battery management method

Aspects of the disclosed technology include techniques, a mechanism, and an apparatus for diagnosing a battery. One or more processors may measure voltages of a plurality of batteries and, based on the measured voltages, determine a voltage deviation of the plurality of batteries. The one or more processors may determine a voltage deviation variation of each battery of the plurality of batteries at predetermined times periods and may compare a pattern of the voltage deviation variations of each battery of the plurality of batteries with a preset diagnosis pattern to diagnose a state of each of the plurality of batteries.

Diagnosing batteries based on voltage deviation variations

Disclosed is a battery cell diagnosing apparatus, which includes a current measuring unit configured to measure a current of a battery cell; a voltage sensing unit configured to sense a cell voltage of the battery cell; and a first control unit configured to transmit first information of the battery cell including data obtained from the current measuring unit and the voltage sensing unit to an external device, receive second information including diagnostic information of the battery cell obtained based on the first information from the external device, and diagnose an abnormal state of the battery cell based on the first information and the second information.

Disclosed is an apparatus and method for controlling power of a parallel multi pack system. The power control apparatus includes first to nsensor units measuring operation characteristic values of first to nbattery packs connected in parallel; a power management unit controlling a power consumed in a load or a power provided by a charging device; and a multi pack management unit that: determines a pack resistance of each of the battery packs based on the operation characteristic value of each battery pack received from the sensor units, determines a minimum available power among available powers respectively corresponding to the pack resistances of the battery packs, determines a total power of the parallel multi pack system so the pack power of a battery pack having a lowest pack resistance becomes identical to the minimum available power, and transmit the determined total power to the power management unit.

Apparatus and method for controlling power of parallel multi pack system

Disclosed is an apparatus and method for estimating a battery state, the apparatus including a measurement unit for measuring a terminal voltage, a charging/discharging current and a current offset value of a battery, a prediction unit for predicting a state variable and an output variable according to a state equation including SOC and an overpotential of the battery as state variables and includes a terminal voltage of the battery as an output variable, a correction unit for correcting the predicted state variable, a SOC estimation unit for estimating SOC of the battery by means of the corrected state variable, and a control unit for selecting a single state variable to estimate SOC of the battery according to the measured current offset value, so that the SOC estimation unit estimates SOC of the battery by means of the selected state variable.

Battery management system including apparatus for estimating battery state

Disclosed is an apparatus (and method) for charging a battery having a voltage measuring unit for measuring a voltage, a control unit for outputting a charge control signal corresponding to an early charging mode in which the battery is charged until a voltage of the battery rises to a preset cut-off voltage (Vc) and a charge control signal corresponding to a late charging mode in which the battery is charged while lowering a charge power in phases, and a charging unit for providing a charge power corresponding to the charge control signal to the battery, wherein a point of lowering the charge power in phases is associated with a point at which the voltage of the battery reaches the cut-off voltage again by the lowered charge power. Therefore, a voltage level reached at full charge of a battery may be raised in a simple and efficient way.

Apparatus and method for charging battery by lowering charge power in phase

The present invention discloses an apparatus for managing a battery pack by reflecting a degradation degree of secondary cells, selecting the secondary cell having a maximum disparate voltage value among calculated disparate voltage values as a degraded cell in the current charging cycle, and updating the information on the degraded cell.

Apparatus and method for managing battery pack based on degraded cell

The present disclosure describes an apparatus and method for estimating state of health (SOH) of a battery. The apparatus for estimating state of health of a battery includes a sensing unit for measuring a battery voltage and current within a predetermined charging voltage range; a memory unit storing the battery voltage and current values measured by the sensing unit and SOH-based ampere counting values, obtained by an ampere counting experiment of a battery whose actual degradation degree is known; and a control unit for calculating an ampere counting value by counting the measured current values stored in the memory unit within the charging voltage range, and estimating a SOH value by mapping the SOH value corresponding to the calculated ampere counting value from the SOH-based ampere counting values stored in the memory unit.

Apparatus and method for estimating state of health of battery

Disclosed is a relay control apparatus and method for electric drive vehicles. The apparatus controls turn-off of a relay operative to connect an electric drive unit with a battery pack for supplying electrical power to the electric drive unit, and comprises a current sensor for measuring and outputting a residual current flowing between the battery pack and the electric drive unit; and a controller for, in a situation requiring turn-off of the relay, receiving the measured residual current value, comparing the measured residual current value with a reference value for the residual current, and controlling to maintain the ON-state of the relay or to turn off the relay on the basis of the comparison results. Accordingly, it prevents a relay of electric drive vehicles from being damaged due to over-current such as a surge current, at the time of turning off the relay.

Apparatus and method for controlling a relay in electric drive vehicle

Disclosed are a method and an apparatus for detecting abnormality of a current sensor operative to measure a charge or discharge current of a battery pack. The method comprises measuring current and voltage of the battery pack; and detecting abnormality of the current sensor by comparing variations in current and voltage over a predetermined time with a current reference value and a voltage reference value, respectively. According to the present invention, it is capable of improving reliability of the battery pack, and in case that the current sensor is out of order, of protecting the battery pack from dangerous accidents such as explosion.

Growing community of inventors

Daejeon, South Korea

Cheol-Taek Kim