公开(公告)号：US20190123394A1

公开(公告)日：2019-04-25

申请号：US16094092

申请日：2017-12-01

申请人： LG CHEM, LTD.

发明人： Sun-Young CHA ,  Won-Tae JOE

IPC分类号： H01M10/42 ,  H01M4/58 ,  H01M10/48

摘要： Disclosed is a battery management apparatus and method for calibrating the state of charge (SOC) of a lithium iron phosphate (LFP) battery. The battery management apparatus according to an embodiment of the present disclosure calculates, when going into calibration mode, an average voltage value of voltage values received from a voltage measuring unit for a predefined time, calculates an average current value of current values received from a current measuring unit for the predefined time, calculates an average internal resistance value of the LFP battery for the predefined time based on the average voltage value and the average current value, determines if the average internal resistance value is equal to or larger than a preset reference resistance value, and when the average internal resistance value is equal to or larger than the reference resistance value, calibrates the current SOC to a preset reference SOC.

公开(公告)号：US20150137822A1

公开(公告)日：2015-05-21

申请号：US14565647

申请日：2014-12-10

申请人： LG CHEM, LTD.

发明人： Won-Tae JOE ,  Sun-Young CHA ,  Geun-Chang CHUNG

IPC分类号： G01R31/36

CPC分类号： G01R31/3606 ,  G01R31/362 ,  G01R31/3648 ,  G01R31/3651 ,  H01M4/364 ,  H01M10/48 ,  H01M2004/028

摘要： Disclosed is an apparatus and method for estimating a SOC of a secondary battery containing a blended cathode material. The SOC estimating apparatus estimates a SOC of a secondary battery including a cathode having a blended cathode material containing a first cathode material and a second cathode material with different operating voltage ranges, an anode having an anode material, and a separator for separating the cathode from the anode, and the apparatus includes a sensor configured to measure a discharge inception voltage and a final discharge voltage when the secondary battery is discharged for a predetermined time, and a control unit configured to estimate SOC of the secondary battery corresponding to the measured discharge inception voltage and the measured final discharge voltage by using a predetermined relationship between the discharge inception voltage and the final discharge voltage and the SOC of the secondary battery.

摘要翻译： 公开了一种用于估计包含混合阴极材料的二次电池的SOC的装置和方法。 SOC估计装置估计包括具有包含具有不同工作电压范围的第一阴极材料和第二正极材料的共混阴极材料的阴极的二次电池的SOC，具有阳极材料的阳极和用于将阴极分离的隔板 所述阳极和所述装置包括传感器，被配置为当所述二次电池放电预定时间时测量放电起始电压和最终放电电压;以及控制单元，被配置为估计与所测量的放电初始化相对应的二次电池的SOC 通过使用放电初始电压与最终放电电压和二次电池的SOC之间的预定关系来测量最终放电电压。

公开(公告)号：US20210055348A1

公开(公告)日：2021-02-25

申请号：US16640184

申请日：2018-09-09

申请人： LG CHEM, LTD.

发明人： Young-Jin KIM ,  Sun-Young CHA

IPC分类号： G01R31/367 ,  G01R31/3842 ,  G01R31/388 ,  G01R31/374

摘要： Provided is an apparatus and method for estimating a state of charge of a secondary battery. The apparatus includes a sensor unit configured to measure a voltage and a current of the secondary battery in a predetermined cycle, and a control unit operably coupled to the sensor unit. The control unit is configured to estimate the state of charge of the secondary battery in the predetermined cycle based on the voltage and the current measured by the sensor unit. The control unit is further configured to determine an operating state of the secondary battery as any one of a linear operating state and a non-linear operating state based on a threshold voltage and the measured voltage, and then determine first process noise indicating inaccuracy of a current integration model and second process noise indicating inaccuracy of an equivalent circuit model according to the determined operating state.

公开(公告)号：US20190257890A1

公开(公告)日：2019-08-22

申请号：US16308953

申请日：2017-10-18

申请人： LG CHEM, LTD.

发明人： Sun-Young CHA ,  Won-Tae JOE

IPC分类号： G01R31/3842 ,  H01M10/48 ,  H02J7/00

摘要： Disclosed is a battery management apparatus and method. The battery management apparatus according to an embodiment of the present disclosure may be configured to, when the voltage of a battery being discharged is equal to or lower than a preset discharge threshold voltage, predict the time left for a lower limit of discharge voltage preset lower than the discharge threshold voltage from the current time, and maintain or adjust the output parameter of the battery based on the predicted remaining time.

公开(公告)号：US20190178951A1

公开(公告)日：2019-06-13

申请号：US16093793

申请日：2017-12-19

申请人： LG CHEM, LTD.

发明人： Sun-Young CHA ,  Won-Tae JOE

IPC分类号： G01R31/3842 ,  H01M10/48 ,  G01R31/389 ,  H01M10/44 ,  G01R31/36 ,  H01M10/42

摘要： Disclosed is an apparatus and method for managing a battery. The battery management apparatus according to an embodiment of the present disclosure includes a memory unit and a control unit. The memory unit is configured to store a plurality of discharge curve models including a first discharge curve model associated with a first state of charge value, and in this instance, the first discharge curve model defines a change in voltage of a battery having the first state of charge value over time under a first discharge condition. The control unit is connected to the memory unit, allowing communication with the memory unit, and is configured to call the first discharge curve model stored in the memory unit.

公开(公告)号：US20130342169A1

公开(公告)日：2013-12-26

申请号：US13973345

申请日：2013-08-22

申请人： LG CHEM, LTD.

发明人： Won-Tae JOE ,  Geun-Chang CHUNG ,  Sun-Young CHA

IPC分类号： G01R31/36 ,  H02J7/00

CPC分类号： G01R31/3665 ,  G01R31/362 ,  G01R31/3627 ,  G01R31/3644 ,  G01R31/3648 ,  G01R31/3651 ,  G01R31/3662 ,  H01M4/13 ,  H01M4/362 ,  H01M10/48 ,  H02J7/0047 ,  H02J7/007 ,  H02J2007/005

摘要： Disclosed is an apparatus for estimating a voltage of a secondary battery which includes a cathode comprising a first cathode material and a second cathode material with different operating voltage ranges, an anode comprising an anode material and a separator for separating the cathode from the anode. The apparatus comprises a control unit configured to estimate a voltage of a secondary battery based on a circuit model including a first cathode material circuit, a second cathode material circuit and an anode material circuit, each circuit modeled to change its voltage according to State Of Charge (SOC) of the electrode material corresponding the circuit and a current flowing through the circuit.

公开(公告)号：US20200096573A1

公开(公告)日：2020-03-26

申请号：US16500636

申请日：2018-09-05

申请人： LG CHEM, LTD.

发明人： Sun-Young CHA

IPC分类号： G01R31/389 ,  H01M10/42 ,  H01M10/48 ,  G01R31/367

摘要： Provided are a battery management system and method for optimizing an internal resistance of a battery. The battery management system includes: a current measurement unit configured to measure a discharging current of the battery; a memory configured to store a plurality of voltage-current characteristic profiles; and a control unit operatively connected to the current measurement unit and the memory and configured to determine a reference profile from the plurality of voltage-current characteristic profiles based on a state of charge and a temperature of the battery. The reference profile includes a start point, an end point, and a plurality of intermediate points positioned between the start point and the end point. The control unit is further configured to: determine an internal resistance of the battery based on the start point and the end point; set one of the plurality of intermediate points as a reference point; determine a reference resistance smaller than the internal resistance based on the reference point and the end point; and determine an optimum resistance larger than the internal resistance based on the discharging current, the internal resistance, the reference resistance, and a predetermined discharge upper limit current.

公开(公告)号：US20200088805A1

公开(公告)日：2020-03-19

申请号：US16614559

申请日：2018-11-15

申请人： LG CHEM, LTD.

发明人： Sun-Young CHA

IPC分类号： G01R31/389 ,  H01M10/48

摘要： A battery management system for optimizing the internal resistance of a battery includes a current measuring unit that measures a charge current of the battery, a memory that stores a plurality of voltage-current characteristic profiles, and a control unit that determines a reference profile from the plurality of voltage-current characteristic profiles based on a state of charge and temperature of the battery. The reference profile includes a start point, an end point, and a plurality of intermediate points disposed between the start point and the end point. The control unit determines an internal resistance of the battery, sets one of the plurality of intermediate points as a reference point, determines a reference resistance based on the reference point and the end point, and determines an optimal resistance based on the charge current, the internal resistance, the reference resistance and a predetermined upper limit of charge current.

公开(公告)号：US20180090962A1

公开(公告)日：2018-03-29

申请号：US15567434

申请日：2016-11-14

申请人： LG CHEM, LTD.

发明人： Sun-Young CHA ,  Won-Tae JOE

IPC分类号： H02J7/00 ,  G01R31/36 ,  G01K1/02

CPC分类号： H02J7/0063 ,  B60L53/00 ,  B60L58/12 ,  G01K1/022 ,  G01K1/024 ,  G01R31/36 ,  G01R31/3648 ,  G01R31/3842 ,  H01M10/42 ,  H01M10/44 ,  H01M10/48 ,  H02J7/0029 ,  H02J7/0068 ,  H02J7/007 ,  H02J2007/005 ,  H02J2007/0067

摘要： The present disclosure discloses a system and method of adjusting an output parameter of a secondary battery. The system according to the present disclosure determines a voltage, a current, and a temperature of the secondary battery, determines a state of charge of the secondary battery using the current, determines a deration target current value calculated from a maximum value of a predefined resistance change rate, which corresponds to the state of charge and the temperature, and an output maintaining time, when the voltage of the secondary battery decreases to a preset threshold voltage or lower, and provides an output parameter including at least one of the deration target current value and a deration target output value determined therefrom to a control system of a load device supplied with power from the secondary battery.

公开(公告)号：US20170146610A1

公开(公告)日：2017-05-25

申请号：US15323601

申请日：2015-09-30

申请人： LG CHEM, LTD.

发明人： Sun-Young CHA ,  Won-Tae JOE

IPC分类号： G01R31/36

CPC分类号： G01R31/3679 ,  G01R31/36 ,  G01R31/3651 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/48

摘要： A method for estimating an SOC-OCV profile by degradation of a secondary battery according to an embodiment of the present disclosure includes individually obtaining an SOC-OCV profile (a first profile) of a cathode of the secondary battery and an SOC-OCV profile (a second profile) of an anode of the secondary battery using a half cell; obtaining a new SOC-OCV profile (a third profile) of the cathode by reflecting a level of degradation (a %) by use of the secondary battery to modify the SOC-OCV profile of the cathode, but setting only an SOC range to be narrow in proportion to the level of degradation while maintaining an OCV range of the cathode as it is; obtaining a new SOC-OCV profile (a fourth profile) of the anode by migrating the SOC-OCV profile of the anode in a horizontal direction taking into account the level of degradation by use of the secondary battery; and obtaining a new SOC-OCV profile (a fifth profile) by determining a subtraction of an OCV value by the SOC-OCV profile of the anode from an OCV value by the SOC-OCV profile of the cathode as an OCV value of the secondary battery.