Abstract: A battery diagnosing apparatus includes a measuring unit configured to measure voltage and temperature of a battery, an ohmic resistance determining unit configured to determine an ohmic resistance of the battery based on an impedance profile generated for the battery, and a control unit configured to calculate a voltage change amount by comparing the voltage of the battery measured by the measuring unit with a reference voltage, calculate a resistance change rate by comparing the ohmic resistance determined by the ohmic resistance determining unit with a reference resistance, judge an internal gas generation level of the battery by comparing magnitudes of the calculated resistance change rate and a criterion resistance change rate, and judge an internal gas generation cause of the battery by comparing magnitudes of the calculated voltage change amount and a criterion voltage change amount.

Abstract: Disclosed is an apparatus and method for controlling an operation of a secondary battery using a relative deterioration degree of an electrode. The method includes determining a SOC of the secondary battery whenever a pulse current flows through the secondary battery; determining an electrochemical reaction resistance from a voltage change amount measured during a preset initial time in each pulse current section and determining a lithium ion diffusion resistance from a voltage change amount measured during a remaining time except for the initial time; determining a deterioration-biased electrode by comparing a deterioration diagnosing resistance ratio, which is a relative ratio of the lithium ion diffusion resistance to the electrochemical reaction resistance, with a preset reference deterioration diagnosing resistance ratio; and adaptively adjusting an operation condition of a next charging/discharging cycle according to the type of the deterioration-biased electrode.

Abstract: A battery diagnosing apparatus includes a measuring unit configured to measure discharge capacity and temperature of a battery, an ohmic resistance determining unit configured to determine an ohmic resistance of the battery based on an impedance profile generated for the battery, and a control unit configured to calculate a capacity change rate by comparing the discharge capacity of the battery measured by the measuring unit with a reference capacity, calculate a resistance change rate by comparing the ohmic resistance determined by the ohmic resistance determining unit with a reference resistance, judge an internal gas generation level of the battery by comparing magnitudes of the calculated resistance change rate and a criterion resistance change rate, and judge an internal gas generation cause of the battery by comparing magnitudes of the calculated capacity change rate and a criterion capacity change rate.

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: A battery management apparatus including a processor and memory having programmed thereon instructions that, when executed, are configured to cause the processor to generate a differential profile for a battery profile representing a corresponding relationship between voltage and capacity of a battery; determine a criterion peak and a target peak in the differential profile, and diagnose a state of the battery based on a result of comparing a differential value of the criterion peak and a differential value of the target peak.

Abstract: A battery management apparatus includes a measuring unit configured to measure a voltage of a battery after discharge of the battery is terminated to a preset discharge termination voltage in every cycle, and a control unit configured to receive voltage information of the battery from the measuring unit in every cycle, calculate a first voltage deviation of the battery based on a preset first criterion voltage and the voltage of the battery, calculate a second voltage deviation between the first voltage deviation and a preset second criterion voltage in each cycle, and adjust the discharge termination voltage based on a criterion deviation set to correspond to a current cycle and the second voltage deviation calculated in the current cycle.

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: A battery classification apparatus includes: a measuring unit configured to measure a voltage of a battery and measure a resistance corresponding to the voltage of the battery; a profile generating unit configured to obtain battery information about the voltage and the resistance of the battery measured by the measuring unit and generate a resistance profile representing a corresponding relationship between the voltage and the resistance based on the battery information; and a control unit configured to determine a criterion resistance based on a resistance value in the resistance profile, determine a reference resistance corresponding to a highest voltage in the resistance profile, and classify a type of the battery based on the criterion resistance and the reference resistance according to a content of nickel contained in the battery.

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: An apparatus for diagnosing a degree of degradation of a battery includes a measuring unit configured to measure a voltage of each of a plurality of battery cells in each of a plurality of cycles where charging and discharging is performed and output voltage information about the plurality of measured voltages, and a control unit configured to receive the plurality of voltage information, calculate a voltage deviation of each cycle for each battery cell based on a reference voltage of each of the plurality of battery cells, select a cycle section satisfying a predetermined condition for each of the plurality of battery cells based on the calculated voltage deviation, calculate a voltage deviation change rate corresponding to each of the plurality of selected cycle sections, and diagnose a relative degree of degradation of the plurality of battery cells based on the plurality of calculated voltage deviation change rates.

Abstract: A battery management apparatus includes: a measuring unit to measure voltage and capacity of a battery cell; a profile generating unit to generate a battery profile representing a correspondence between the voltage and the capacity measured by the measuring unit and generate a positive electrode profile of the battery cell based on the generated battery profile and a reference negative electrode profile and a reference negative electrode differential profile preset for the battery cell; and a control unit configured to receive the generated positive electrode profile from the profile generating unit, derive a conversion function representing conversion information from the reference positive electrode profile to the generated positive electrode profile, generate a positive electrode prediction profile for the battery cell from the reference positive electrode profile based on the derived conversion function, and generate a battery prediction profile for the battery cell based on the generated positive electro

Abstract: A battery diagnosing apparatus includes a profile generating unit configured to generate a differential profile representing a corresponding relationship between a voltage of a battery and a differential capacity for the voltage of the battery and a control unit configured to receive the differential profile from the profile generating unit, determine a target peak in the differential profile, determine a behavior pattern of the target peak based on a reference peak included in a preset reference profile, and diagnose a state of a negative electrode of the battery by comparing the behavior pattern determined for the target peak with a plurality of preset behavior types.

Abstract: A battery management apparatus and method performs appropriate control to increase the lifespan of a battery cell by judging whether degradation of the battery cell is accelerated. Since both the voltage change pattern and the differential capacity change pattern between the plurality of peaks included in the plurality of differential profiles are considered, there is an advantage that it is possible to accurately determine whether the state of the battery cell is in a degradation accelerated state.

Abstract: A battery management apparatus includes a profile generating unit configured to obtain a battery profile representing a correspondence between voltage and SOC of a battery and generate a differential profile representing a correspondence between the SOC and a differential voltage of the SOC based on the obtained battery profile, and a control unit configured to receive the differential profile from the profile generating unit, calculate a degree of association between the differential profile and a preset criterion profile, and judge a type of a negative electrode of the battery based on the calculated degree of association.

Abstract: A battery diagnosis apparatus includes: an ohmic resistance determining unit configured to determine an ohmic resistance of a battery cell in each of a plurality of impedance profiles generated at different time points for the battery cell, a resistance change rate calculating unit configured to calculate a resistance change rate between the plurality of determined ohmic resistances, a gas generation level determining unit configured to determine an internal gas generation level of the battery cell based on the calculated resistance change rate, and a state diagnosing unit configured to diagnose a state of the battery cell according to the determined internal gas generation level.

Abstract: A battery management apparatus and method according to an embodiment of the present disclosure is directed to obtaining a positive electrode profile and a negative electrode profile for a battery cell in a non-destructive manner by appropriately adjusting a preset negative electrode profile. According to one aspect of the present disclosure, by using the battery profile and the adjusted negative electrode profile for the degraded battery cell, there is an advantage that the positive electrode profile of the degraded battery cell may be easily estimated in a non-destructive manner.

Abstract: A battery management system includes a sensor to sense voltage and current of a battery, memory to store over-potential management information including reference peak and reference peak voltage values, and a controller to command constant-current charging using a maximum allowable C-rate to a charging circuit when the reference peak value is equal to or larger than a threshold peak value, in response to a charge request, determine a differential capacity curve indicating a correlation between the voltage and differential capacity of the battery within a range based on the sensed voltage and current during the charging, determine main peak and main peak voltage values indicating differential capacity and voltage of a peak of the differential capacity curve, respectively. and update the reference peak and reference peak voltage values to equal the main peak and main peak voltage values, when the main peak value is less than the threshold peak value.

Abstract: A battery diagnosing apparatus includes a measuring unit configured to measure discharge capacity and temperature of a battery, an ohmic resistance determining unit configured to determine an ohmic resistance of the battery based on an impedance profile generated for the battery, and a control unit configured to calculate a capacity change rate by comparing the discharge capacity of the battery measured by the measuring unit with a reference capacity, calculate a resistance change rate by comparing the ohmic resistance determined by the ohmic resistance determining unit with a reference resistance, judge an internal gas generation level of the battery by comparing magnitudes of the calculated resistance change rate and a criterion resistance change rate, and judge an internal gas generation cause of the battery by comparing magnitudes of the calculated capacity change rate and a criterion capacity change rate.

Abstract: A battery classification apparatus includes a profile generating unit configured to obtain battery information about capacity and voltage of a battery and generate a differential profile representing a corresponding relationship between the capacity and a differential voltage based on the capacity and the voltage, and a control unit configured to obtain the differential profile from the profile generating unit, detect a plurality of peaks in the obtained differential profile, and classify the battery into any one of a plurality of preset groups based on a plurality of classification conditions preset for the number of the plurality of detected peaks and the differential voltage.

Abstract: A battery management apparatus and method capable of preventing lithium plating from occurring in a battery cell by determining an optimal upper limit C-rate corresponding to the battery cell. In particular, since the charging and discharging of the battery cell may be controlled according to the determined upper limit C-rate, it is possible to prevent side reactions from occurring in the battery cell due to charging and discharging according to the high C-rate, and since the degradation of the battery cell may be slowed, the lifespan of the battery cell may be increased.