Abstract: The present disclosure relates to a battery management apparatus and method, which sets a degraded SOC region based on a SOC-based voltage difference between a charging voltage and a discharging voltage according to a SOC of a battery and estimates a degree of degradation of the battery based on the voltage difference in the set degraded SOC region.

Abstract: Provided are an apparatus, method and battery pack for determining a degradation degree of a battery. The apparatus generates first sensing information indicating a voltage and a current of the battery while the battery is charged with a first constant current. The apparatus generates second sensing information indicating a voltage and a current of the battery for a second period during which the battery is discharged with a second constant current. The apparatus determines a first differential capacity curve based on the first sensing information and a second differential capacity curve based on the second sensing information. The apparatus is configured to determine the degradation degree of the battery based on a voltage value of a first charge feature point of the first differential capacity curve and a voltage value of a first discharge feature point of the second differential capacity curve.

Abstract: An apparatus for diagnosing a battery includes a sensing unit configured to measure a potential and a current of a battery, and a processor configured to estimate a capacity of the battery based on the current measured by the sensing unit, detect inflection points in potential-capacity data in which the potential and the estimated capacity are mapped with each other, estimate an electrode potential of each inflection point, calculate a potential difference between each estimated electrode potential and a reference electrode potential, diagnose a change of at least one of an active material area, a depth of charge and a depth of discharge of an electrode of the battery based on an increase or decrease pattern of the plurality of calculated potential differences, and determine a mode of the battery as a normal mode or a failure mode based on the diagnosis result.

Abstract: The present invention relates to a device and a method for diagnosing battery deterioration, the device comprising: a battery comprising at least one cell; a charging unit for charging the cell, and performing cut-off during a stabilization time in which the charged cell is stabilized; a sensing unit for measuring a current of the cell with respect to time; and a control unit for, by using the measured current, detecting an inflection point of the measured current, calculating a slope of the measured current in a first period after a time corresponding to the inflection point; and comparing the current slope of a reference cell, corresponding to the slope of the measured current, so as to diagnose whether the cell has deteriorated.

Abstract: An apparatus for diagnosing a battery includes a sensing unit configured to measure a potential and a current of a battery, and a processor configured to estimate a capacity of the battery based on the current measured by the sensing unit, detect inflection points in potential-capacity data in which the potential and the estimated capacity are mapped with each other, estimate an electrode potential of each inflection point, calculate a potential difference between each estimated electrode potential and a reference electrode potential, diagnose a change of at least one of an active material area, a depth of charge and a depth of discharge of an electrode of the battery based on an increase or decrease pattern of the plurality of calculated potential differences, and determine a mode of the battery as a normal mode or a failure mode based on the diagnosis result.

Abstract: A battery state estimating apparatus includes: a voltage measuring unit configured to measure a voltage of a battery cell and measure an open circuit voltage (OCV) of the battery cell whenever the measured voltage reaches a reference discharge voltage; and a control unit configured to receive the OCV measured by the voltage measuring unit, compare the received OCV with a pre-stored reference voltage to calculate a voltage fluctuation rate, determine a voltage increase and decrease pattern based on the calculated voltage fluctuation rate and pre-stored voltage fluctuation rate data, and determine a degradation acceleration degree of the battery cell according to the determined voltage increase and decrease pattern.

Abstract: A battery state estimating apparatus including a voltage measuring unit configured to measure a voltage of a battery cell and measure an open circuit voltage (OCV) of the battery cell whenever the measured voltage reaches a reference charge voltage and a control unit configured to receive the OCV measured by the voltage measuring unit, calculate a voltage fluctuation rate based on a result obtained by processing the received OCV, determine a voltage increase and decrease pattern based on the calculated voltage fluctuation rate and pre-stored voltage fluctuation rate data, and determine a degradation acceleration degree of the battery cell according to the determined voltage increase and decrease pattern.

Abstract: A apparatus for diagnosing battery includes a sensing unit configured to measure a voltage of a battery and a processor configured to estimate a state of charge (SOC) of the battery, detect a plurality of inflection data from SOC-voltage data of the battery where the voltage received from the sensing unit and the estimated SOC are mapped, calculate a differential coefficient increase or decrease rate at each of the plurality of inflection data detected based on a preset reference differential coefficient, diagnose a change of an electrode reaction resistance of the battery depending on whether the plurality of calculated differential coefficient increase or decrease rates belong to a preset reference increase or decrease rate range, and adjust the magnitude of a charge or discharge current of the battery only when it is diagnosed that the electrode reaction resistance is increased.

Abstract: A battery management apparatus for changing a control condition according to a degradation pattern in a charge situation of a battery cell. Since not only the degradation degree of the battery cell but also the degradation acceleration degree of the battery cell is estimated, the present degradation state of the battery cell may be more accurately estimated, and the future degradation state of the battery cell may also be predicted more accurately.

Abstract: A battery management apparatus for providing more specific information about degradation of a battery cell and changing a control condition according to a degradation pattern of the battery cell. Since not only the degradation degree of the battery cell but also the degradation pattern of the battery cell is estimated, the present state of the battery cell may be more accurately estimated.

Abstract: The present disclosure relates to a battery management apparatus and method, which sets a degraded SOC region based on a SOC-based voltage difference between a charging voltage and a discharging voltage according to a SOC of a battery and estimates a degree of degradation of the battery based on the voltage difference in the set degraded SOC region.

Abstract: An apparatus and method for determining electrode information of a battery including a positive electrode and a negative electrode, and a battery pack including the apparatus. The apparatus includes a sensing unit configured to measure a voltage and a current of the battery, and a processor. The processor generates a V-dQ/dV curve based on the voltage and the current of the battery. The V-dQ/dV curve indicates a relationship between V (the voltage of the battery) and dQ/dV (a ratio of an amount of change dQ of the remaining capacity to an amount of change dV of the voltage of the battery). The processor detects a plurality of feature points from the V-dQ/dV curve. The processor determines information associated with each of the first electrode and the second electrode as the electrode information based on the plurality of feature points.

Abstract: An apparatus for diagnosing a battery includes a sensing unit configured to measure a potential and a current of a battery, and a processor configured to estimate a capacity of the battery based on the current measured by the sensing unit, detect inflection points in potential-capacity data in which the potential and the estimated capacity are mapped with each other, estimate an electrode potential of each inflection point, calculate a potential difference between each estimated electrode potential and a reference electrode potential, diagnose a change of at least one of an active material area, a depth of charge and a depth of discharge of an electrode of the battery based on an increase or decrease pattern of the plurality of calculated potential differences, and determine a mode of the battery as a normal mode or a failure mode based on the diagnosis result.

Abstract: A battery diagnostic device includes a sensing unit configured to measure a current and voltage of a battery, and a processor configured to estimate a SOC of the battery based on the measured current, select a plurality of SOCs from SOC-voltage data mapping the voltage and the estimated SOC with each other, divide a preset SOC region into a plurality of sub-regions based on sizes of the selected SOCs, calculate a region change value of each of the sub-regions based on the sizes of the sub-regions and a size of a preset reference region, diagnose whether at least one of an active material area, a depth of discharge and a depth of charge of the battery changes based on the calculated change values of sub-regions, and determine whether a mode of the battery is a normal mode or a failure mode based on the diagnosis.

Abstract: A battery management apparatus, including: a sensing unit configured to generate battery information indicating a battery voltage and current; and a control unit configured to: determine a differential voltage curve based on a history of the battery information from the sensing unit during a sensing period while the battery is being charged with a first current rate current, the differential voltage curve indicating a relationship between a remaining capacity of the battery and a ratio of a voltage change amount of the battery to a remaining capacity change amount of the battery during the sensing period; detect feature points from the differential voltage curve; determine whether stabilization for an electrode material of the battery is required, based on a feature value of each of the feature points; and output a control signal to induce the battery to be discharged with a smaller second current rate current, when stabilization is required.

Abstract: A apparatus for diagnosing battery includes a sensing unit configured to measure a voltage of a battery and a processor configured to estimate a state of charge (SOC) of the battery, detect a plurality of inflection data from SOC-voltage data of the battery where the voltage received from the sensing unit and the estimated SOC are mapped, calculate a differential coefficient increase or decrease rate at each of the plurality of inflection data detected based on a preset reference differential coefficient, diagnose a change of an electrode reaction resistance of the battery depending on whether the plurality of calculated differential coefficient increase or decrease rates belong to a preset reference increase or decrease rate range, and adjust the magnitude of a charge or discharge current of the battery only when it is diagnosed that the electrode reaction resistance is increased.

Abstract: The present invention relates to a device and a method for diagnosing battery deterioration, the device comprising: a battery comprising at least one cell; a charging unit for charging the cell, and performing cut-off during a stabilization time in which the charged cell is stabilized; a sensing unit for measuring a current of the cell with respect to time; and a control unit for, by using the measured current, detecting an inflection point of the measured current, calculating a slope of the measured current in a first period after a time corresponding to the inflection point; and comparing the current slope of a reference cell, corresponding to the slope of the measured current, so as to diagnose whether the cell has deteriorated.

Abstract: A separator includes a monolayer-type polyolefin-based micro-porous film having a porosity of 40 to 60%, an average pore diameter of 60 nm or less, and an air permeability of 350 s/100 mL or less; and a porous coating layer formed on at least one surface of the micro-porous film and made of a mixture of a plurality of inorganic particles and a binder polymer. An electrochemical device having the above separator has excellent thermal stability and allows a high power while minimizing the occurrence of leak current.

Abstract: A separator includes a monolayer-type polyolefin-based micro-porous film having a porosity of 40 to 60%, an average pore diameter of 60 nm or less, and an air permeability of 350 s/100 mL or less; and a porous coating layer formed on at least one surface of the micro-porous film and made of a mixture of a plurality of inorganic particles and a binder polymer. An electrochemical device having the above separator has excellent thermal stability and allows a high power while minimizing the occurrence of leak current.

Abstract: A separator includes a monolayer-type polyolefin-based micro-porous film having a porosity of 40 to 60%, an average pore diameter of 60 nm or less, and an air permeability of 350 s/100 mL or less; and a porous coating layer formed on at least one surface of the micro-porous film and made of a mixture of a plurality of inorganic particles and a binder polymer. An electrochemical device having the above separator has excellent thermal stability and allows a high power while minimizing the occurrence of leak current.