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1. 发明授权

US11119157B2 Method, apparatus and recording medium for estimating parameters of battery equivalent circuit model 有权
公开(公告)号：US11119157B2
公开(公告)日：2021-09-14
申请号：US16610208
申请日：2018-11-10
申请人： LG CHEM, LTD.
发明人： Young-Jin Kim , Sun-Young Cha
IPC分类号： G01R31/367 , G01R31/389
摘要： Disclosed is a method and apparatus for estimating parameters of a battery equivalent circuit model. The battery equivalent circuit model includes a first and second resistors and a capacitor. The method includes reading a pulse discharge profile corresponding to a parameter estimation condition from a plurality of pre-stored pulse discharge profiles, the pulse discharge profile including a first number of terminal voltages sequentially measured from a battery having a specific SOC in a predetermined cycle while the battery is discharged with a specific constant current from an OCV corresponding to the specific SOC to a lower limit of discharge voltage at a specific temperature, extracting a second number of terminal voltages between the OCV and a threshold voltage from the first number of terminal voltages, and estimating resistance values of the first and second resistors based on the OCV, the constant current, and the second number of terminal voltages.

2. 发明授权

US10408886B2 Apparatus and method for estimating SOC of secondary battery including blended cathode material 有权
公开(公告)号：US10408886B2
公开(公告)日：2019-09-10
申请号：US14568199
申请日：2014-12-12
申请人： LG CHEM, LTD.
发明人： Won-Tae Joe , Sun-Young Cha
IPC分类号： G01R31/382 , H01M4/36 , H01M10/48 , G01R31/367 , G01R31/3835 , H01M4/02 , G01R31/3828
摘要： Disclosed is an apparatus for estimating a state of charge (SOC) of a secondary battery which includes (i) a cathode comprising a blended cathode material having a first cathode material and a second cathode material, wherein the first and second cathode materials have different operating voltage ranges; (ii) an anode comprising an anode material; and (iii) a separator for separating the cathode from the anode. The apparatus includes a sensor configured to measure a dynamic voltage of the secondary battery during charging of the secondary battery, and a control unit configured to identify a dynamic voltage profile of the secondary battery as a transition region voltage pattern, calculate a parameter of the transition region voltage pattern, and estimate a SOC of the secondary battery from the calculated parameter by using a predetermined relationship between the parameter and the SOC.

3. 发明授权

US09678165B2 Apparatus for estimating depth of discharge (DOD) of secondary battery 有权
公开(公告)号：US09678165B2
公开(公告)日：2017-06-13
申请号：US14424622
申请日：2013-12-04
申请人： LG CHEM, LTD.
发明人： Won-Tae Joe , Sun-Young Cha
IPC分类号： G01N27/416 , G01R31/36 , H01M10/48 , H01M4/36 , G01R19/165 , H01M4/131 , H01M4/505 , H01M4/525 , H01M4/58 , H01M10/052
CPC分类号： G01R31/3651 , G01R19/16542 , G01R31/3606 , G01R31/362 , H01M4/131 , H01M4/364 , H01M4/505 , H01M4/525 , H01M4/5825 , H01M10/052 , H01M10/48
摘要： Disclosed is an apparatus and method for estimating a parameter of a secondary battery. The apparatus includes a sensor unit configured to repeatedly measure a voltage of a secondary battery including a blended cathode material containing at least first and second cathode materials at time intervals when the secondary battery is in an operation state or in an idle state, and a control unit configured to receive the repeatedly measured plurality of voltages from the sensor unit, identify an inflection point in a voltage change profile corresponding to the plurality of voltages, and estimate a depth of discharge (DOD) of the secondary battery by using a voltage measured after the inflection point is identified as a reference voltage.

4. 发明申请

US20150226809A1 APPARATUS FOR ESTIMATING DEPTH OF DISCHARGE (DOD) OF SECONDARY BATTERY 有权
标题翻译：估计二次电池排放量（DOD）深度的装置
公开(公告)号：US20150226809A1
公开(公告)日：2015-08-13
申请号：US14424622
申请日：2013-12-04
申请人： LG CHEM, LTD.
发明人： Won-Tae Joe , Sun-Young Cha
IPC分类号： G01R31/36 , G01R19/165
CPC分类号： G01R31/3651 , G01R19/16542 , G01R31/3606 , G01R31/362 , H01M4/131 , H01M4/364 , H01M4/505 , H01M4/525 , H01M4/5825 , H01M10/052 , H01M10/48
摘要： Disclosed is an apparatus and method for estimating a parameter of a secondary battery. The apparatus includes a sensor unit configured to repeatedly measure a voltage of a secondary battery including a blended cathode material containing at least first and second cathode materials at time intervals when the secondary battery is in an operation state or in an idle state, and a control unit configured to receive the repeatedly measured plurality of voltages from the sensor unit, identify an inflection point in a voltage change profile corresponding to the plurality of voltages, and estimate a depth of discharge (DOD) of the secondary battery by using a voltage measured after the inflection point is identified as a reference voltage.
摘要翻译：公开了一种用于估计二次电池的参数的装置和方法。该装置包括：传感器单元，被配置为在二次电池处于操作状态或处于空闲状态的时间间隔反复测量包括至少包含第一和第二阴极材料的混合阴极材料的二次电池的电压;以及控制被配置为从所述传感器单元接收重复测量的多个电压的单元，识别与所述多个电压对应的电压变化曲线中的拐点，并且使用在所述二次电池之后测量的电压来估计所述二次电池的放电深度（DOD）拐点被识别为参考电压。

5. 发明授权

US09720045B2 Apparatus and method for estimating SOC of secondary battery including blended cathode material 有权
公开(公告)号：US09720045B2
公开(公告)日：2017-08-01
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： G01N27/416 , G01R31/36 , H01M4/36 , H01M10/48 , H01M4/02
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.

6. 发明授权

US09316696B2 Apparatus and method for estimating power of secondary blended comprising blended cathode material 有权
公开(公告)号：US09316696B2
公开(公告)日：2016-04-19
申请号：US14531365
申请日：2014-11-03
申请人： LG CHEM, LTD.
发明人： Won-Tae Joe , Sun-Young Cha
IPC分类号： G01R31/36 , H01M10/42
摘要： Disclosed is an apparatus and method for estimating a power of a secondary battery comprising a blended cathode material. The apparatus according to the present invention estimates a power of a secondary battery comprising a blended cathode material in which at least a first cathode material and a second cathode material are blended, the apparatus comprising a discharging means for discharging the secondary battery under conditions of a plurality of discharge rates (c-rate) different from each other, a sensor means for measuring a plurality of discharge termination voltages (Vf) corresponding to the conditions of the plurality of discharge rates, and a control means for approximating a correlation between the plurality of discharge rates and the plurality of discharge termination voltages by a two-dimensional linear equation, calculating a maximum discharge rate (Cmax) of the secondary battery corresponding to a minimum discharge voltage (Vmin) using the linear equation, and estimating a maximum power (Pmax) of the secondary battery from the calculated maximum discharge rate.

7. 发明授权

US09097773B2 Apparatus and method for estimating parameter of secondary battery 有权
标题翻译：二次电池参数估算装置及方法
公开(公告)号：US09097773B2
公开(公告)日：2015-08-04
申请号：US14527505
申请日：2014-10-29
申请人： LG CHEM, LTD.
发明人： Won-Tae Joe , Geun-Chang Chung , Sun-Young Cha
IPC分类号： G01R31/36 , H01M10/48
CPC分类号： G01R31/3648 , G01R31/3606 , G01R31/362 , G01R31/3665 , G01R31/3679 , G01R31/3689 , H01M10/48 , H01M10/486
摘要： Disclosed is an apparatus and method for estimating a parameter of a secondary battery. The apparatus includes a sensor configured to measure an open circuit voltage (OCVm) of the secondary battery at a first depth of discharge (DOD′), the open circuit voltage (OCVm) corresponding to a difference between a predetermined original cathode voltage (Vc,o) at the first depth of discharge (DOD′) and an anode voltage (Va), and a control unit configured to calculate an anode voltage (Va) from the original cathode voltage (Vc,o) and the open circuit voltage (OCVm), determining that the original anode voltage (Va,o) is identical to the anode voltage (Va), determining a second depth of discharge (DOD″) corresponding to the original anode voltage (Va,o), and determining capacity degradation (Δcapa) of the secondary battery according to a difference between the first depth of discharge (DOD′) and the second depth of discharge (DOD″).
摘要翻译：公开了一种用于估计二次电池的参数的装置和方法。该装置包括传感器，被配置为在第一放电深度（DOD'）下测量二次电池的开路电压（OCVm），开路电压（OCVm）对应于预定的原始阴极电压（Vc， o）和第一放电深度（DOD'）和阳极电压（Va），以及控制单元，被配置为从原始阴极电压（Vc，o）和开路电压（OCVm）计算阳极电压（Va）），确定原始阳极电压（Va，o）与阳极电压（Va）相同，确定对应于原始阳极电压（Va，o）的第二放电深度（DOD“），并确定容量降低（根据第一放电深度（DOD'）和第二放电深度（DOD“）之间的差异，二次电池的电导率（＆Dgr; capa）。

8. 发明授权

US08854005B2 Battery system for secondary battery comprising blended cathode material, and apparatus and method for managing the same 有权
公开(公告)号：US08854005B2
公开(公告)日：2014-10-07
申请号：US13969068
申请日：2013-08-16
申请人： LG Chem, Ltd.
发明人： Won-Tae Joe , Geun-Chang Chung , Sun-Young Cha
IPC分类号： H02J7/00 , H01M10/0562 , G01R31/36 , H01M10/48 , H01M10/052
CPC分类号： H01M10/4257 , G01R31/3624 , G01R31/3651 , H01M4/364 , H01M4/505 , H01M4/525 , H01M4/5825 , H01M4/625 , H01M10/052 , H01M10/0525 , H01M10/425 , H01M10/48 , H01M2010/4271 , H02J7/0063 , H02J7/007 , H02J2007/0067 , Y02E60/12 , Y02E60/122 , Y02P70/54 , Y02T10/7011
摘要： Disclosed is a battery system for a secondary battery including a blended cathode material, and an apparatus and method for managing a secondary battery having a blended cathode material. The blended cathode material includes at least a first cathode material and a second cathode material. The first and second cathode materials have different operating voltage ranges. When the secondary battery comes to an idle state or a no-load state, the battery system detects a voltage relaxation occurring by the transfer of operating ions between the first and second cathode materials.

9. 发明授权

US10670664B2 Method for determining resistance factor of secondary battery, and apparatus and method for estimating charge power using determined resistance factor 审中-公开
公开(公告)号：US10670664B2
公开(公告)日：2020-06-02
申请号：US15317888
申请日：2016-02-02
申请人： LG CHEM, LTD.
发明人： Sun-Young Cha , Won-Tae Joe
IPC分类号： G01R31/389 , G01R31/374 , G01R31/36 , G08C19/02 , G01R27/02 , G01R31/367
摘要： A resistance factor determining method of a secondary battery according to the present disclosure determines, when the secondary battery has a certain temperature and state of charge, a primary differential value regarding a charge initial I-V profile calculated from a current value at a point of intersection at which a charge final I-V profile according to changes in magnitude of the charging current meets a boundary line set to a charge upper limit as the resistance factor corresponding to the temperature and state of charge. Further, a charge power estimating apparatus and method according to the present disclosure estimates a charge power corresponding to the temperature and state of charge of the secondary battery while the secondary battery is being charged using the resistance factor pre-defined according to the state of charge and temperature of the secondary battery.

10. 发明授权

US10209320B2 Method for estimating SOC-OCV profile by degradation of secondary battery 有权
公开(公告)号：US10209320B2
公开(公告)日：2019-02-19
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 , H01M10/48 , H01M4/505 , H01M4/525 , H01M4/587
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.

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