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公开(公告)号：US20210208200A1
公开(公告)日：2021-07-08
申请号：US17210010
申请日：2021-03-23
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Mingshu DU , Shichao LI , Shenzhi TANG , Li TAN , Yanhua LU , Wei ZHANG
IPC: G01R31/367 , H02J7/00 , G01R31/3842
Abstract: The present application provides a method and apparatus for correcting a state of charge. The method for correcting a state of charge comprises: determining an operating state of a battery cell, wherein the operating state comprises a discharging state or a charging state; and determining a corrected state of charge of the battery cell according to an acquired current open circuit voltage of the battery cell, an acquired current accumulative capacity of the battery cell, an accumulative capacity correspondence relationship corresponding to the operating state of the battery cell, and an open circuit voltage curve corresponding to a limit initial state of charge, wherein the accumulative capacity correspondence relationship comprises a correspondence relationship between a pre-measured open circuit voltage and an accumulative capacity threshold. A technical solution of the present application can be used to improve the accuracy of calculation of a state of charge.
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2.发明申请公开(公告)号：US20180106866A1
公开(公告)日：2018-04-19
申请号：US15720151
申请日：2017-09-29
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Li TAN , Yushuai SHI , Nana XIONG , Yanhua LU
CPC classification number: G01R31/382 , G01R19/165 , G01R31/3646 , G01R31/374 , G01R31/3835 , H01M10/4257 , H01M10/48 , H02J7/0047 , H02J7/16
Abstract: A method and an apparatus for calculating the SOC of a battery being charged and a battery pack including the apparatus are disclosed in the present disclosure. The method for calculating the SOC includes: obtaining a full charge voltage and a reference charging voltage curve of the battery; taking a voltage value from the approximately linear ascent stage of the reference charging voltage curve as a preset reference voltage, and obtaining a corresponding reference SOC; acquiring a current charging voltage at which a charging voltage curve corresponding to a current charging state of the battery enters into an approximately linear ascent stage; determining a compensation factor according to the preset reference voltage, the full charge voltage, and the current charging voltage; and utilizing the compensation factor and the reference SOC to calculate a current SOC corresponding to the current charging state of the battery.
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公开(公告)号：US20210116512A1
公开(公告)日：2021-04-22
申请号：US17134253
申请日：2020-12-25
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Mingshu DU , Shichao LI , Shenzhi TANG , Li TAN , Yanhua LU , Wei ZHANG
IPC: G01R31/367 , H02J7/00 , G01R31/3842
Abstract: The present application provides a method and apparatus for correcting a state of charge. The method for correcting a state of charge comprises: determining an operating state of a battery cell, wherein the operating state comprises a discharging state or a charging state; and determining a corrected state of charge of the battery cell according to an acquired current open circuit voltage of the battery cell, an acquired current accumulative capacity of the battery cell, an accumulative capacity correspondence relationship corresponding to the operating state of the battery cell, and an open circuit voltage curve corresponding to a limit initial state of charge, wherein the accumulative capacity correspondence relationship comprises a correspondence relationship between a pre-measured open circuit voltage and an accumulative capacity threshold. A technical solution of the present application can be used to improve the accuracy of calculation of a state of charge.
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