Lg Energy Solution, Ltd.

Lg Chem, Ltd

Toray Industries, Inc.

Toray Battery Separator Film Co., Ltd.

Yoon-Jung Bae

A-Ming Cha

Kyung-Hwa Woo

Ji-Yeon Kim

Dae-Soo Kim

Jae-Hyun Lee

Dong-Kyu Kim

Han-Ho Lee

Hee-Seok Jeong

Jong-Hwan Kim

In-Chul Kim

Jin-Hyung Lim

Young-Deok Kim

Eun-Ju Lee

Seung-Taek Hong

Hye-Jin Kang

Bo-Mi Lim

Sang-Young Lee

Pil-Kyu Park

Song-Yi Han

Hyun-Min Jang

Du-Seong Yoon

Hyun-Jun Choi

Jeong-Man Son

Young-Geun Choi

Hyun-Woo Park

Ji-Sang Yu

Yong-Jun Kim

Gwang-Hoon Jun

Jeong-Mi Choi

Jin-Hyuk Min

Jong-Seok Jeong

Dong-Hun Han

Dong-Wook Koh

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.

Apparatus and method for determining degradation degree of battery and battery pack comprising the apparatus

An apparatus for diagnosing a battery includes a data obtaining unit configured to obtain battery information including voltage and current of a battery during a charging cycle of the battery, and a control unit configured to calculate a constant current charging capacity ratio and a constant voltage charging capacity ratio during the charging cycle based on the battery information, and determine a deterioration type of the battery based on the constant current charging capacity ratio and the constant voltage charging capacity ratio.

Apparatus and method for diagnosing battery

An apparatus for diagnosing a battery includes a data obtaining unit configured to obtain battery information including voltage and current of a battery during a charging cycle of the battery; and a control unit configured to calculate a constant current charging capacity ratio and a constant voltage charging capacity ratio during the charging cycle based on the battery information, and diagnose a state of the battery based on the constant current charging capacity ratio and the constant voltage charging capacity ratio.

A battery diagnosis apparatus, a battery diagnosis method and a battery diagnosis system are disclosed. The battery diagnosis apparatus includes a data acquisition unit configured to acquire battery information indicating a time-dependent change history of a terminal voltage and a charge current of a battery during a reference number of charge cycles performed according to a Constant Current (CC)-Constant Voltage (CV) charging protocol for the battery at beginning of life (BOL). The apparatus also includes a control unit configured to calculate an initial CC capacity ratio for each charge cycle of the reference number of charge cycles performed based on the battery information. A first initial CC capacity ratio in a first charge cycle is a ratio of a first CC charge capacity to a total charge capacity of the battery in the first charge cycle, and the first CC charge capacity is a charge capacity in a first CC charging duration according to the CC-CV charging protocol. The control unit is configured to determine a representative initial CC capacity ratio based on each initial CC capacity ratio of each charge cycle of the reference number of charge cycles; an diagnose the battery by determining an indication of accelerated degradation by comparing the representative initial CC capacity ratio with a predetermined representative reference CC capacity ratio.

Battery diagnosis apparatus, battery diagnosis method and battery diagnosis system

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.

Battery management apparatus and method

A battery management apparatus according to an embodiment of the present disclosure includes a profile obtaining unit configured to obtain a gas amount profile indicating a correspondence relationship between a gas generation amount of a battery and a change amount of a peak; a profile generating unit configured to generate a differential profile for a battery profile indicating a correspondence relationship between a capacity of the battery and a differential voltage; and a control unit configured to determine a change amount of a target peak in the battery profile received from the profile generating unit and set a usage condition of the battery based on a result determined by comparing the determined change amount of the target peak with a control criterion of the gas amount profile.

A battery diagnosing apparatus includes a profile generating unit configured to obtain a battery profile representing a corresponding relationship between voltage and capacity of a battery, and generate a differential profile representing a corresponding relationship between the voltage and a differential capacity for the voltage based on the obtained battery profile, and a control unit configured to receive the differential profile from the profile generating unit, determine a target peak in the differential profile, compare voltages of the determined target peak and a criterion peak of a criterion profile preset for the battery, and judge whether a side reaction occurs in the battery based on the comparison result.

Battery diagnosing apparatus and method

A battery management apparatus according to an embodiment includes a side reaction determining unit configured to determine a target peak in a differential profile representing a corresponding relationship between voltage and differential capacity of a battery, and determine whether a side reaction occurs in the battery by comparing a criterion peak of a preset criterion profile with the target peak. A side reaction cause determining unit is configured to determine a resistance pattern of the battery with respect to a criterion voltage region in a resistance profile representing a corresponding relationship between voltage and resistance of the battery, and determine an occurrence cause of the side reaction based on the determined resistance pattern.

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.

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

A battery management system includes a voltage sensor to generate a voltage signal indicating a voltage of a battery, a current sensor to generate a current signal indicating a current flowing through the battery, and a control unit to record a voltage history and a current history of the battery based on the voltage signal and the current signal at a predetermined time interval during constant current charging of the battery. The control unit determines a differential capacity curve indicating a correlation between the voltage of the battery and a differential capacity in a reference voltage range. The control unit performs a first protection operation for the battery by comparing a first characteristic voltage of a main feature point with a reference voltage when the main feature point is detected from the differential capacity curve.

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

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.

Battery classification apparatus and method

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.

Battery management apparatus

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.

Apparatus and method for controlling operation of secondary battery using relative deterioration degree of electrode

A battery management apparatus includes a measuring unit configured to measure a first voltage of a battery cell at a first time point and measure a second voltage and a second capacity of the battery cell at a second time point later than the first time point, and a control unit configured to calculate a voltage deviation between the first voltage and the second voltage, calculate a capacity deviation between a first capacity corresponding to the first voltage and the second capacity, determine a positive electrode side reaction factor and a negative electrode side reaction factor for the battery cell based on the voltage deviation and the capacity deviation, and judge the type of a side reaction of the battery cell based on the positive electrode side reaction factor and the negative electrode side reaction factor.

A battery management apparatus includes an EIS unit configured to output an AC current to a battery at a plurality of times and generate an EIS profile representing a resistance of the battery as a corresponding relationship between a real part and an imaginary part at each of the plurality of times, and a control unit configured to obtain the plurality of EIS profiles for the battery generated by the EIS unit, determine a plurality of arcs in each of the plurality of EIS profiles, calculate an arc resistance value for each of the plurality of determined arcs, calculate a resistance change rate for the arc resistance value between corresponding arcs among the plurality of arcs, and determine each of the plurality of arcs as a negative electrode-originated arc or a positive electrode-originated arc based on the plurality of calculated resistance change rates and a preset criterion change rate.

Growing community of inventors

Daejeon, South Korea

Yoon-Jung Bae