公开(公告)号：US20230204674A1

公开(公告)日：2023-06-29

申请号：US18170412

申请日：2023-02-16

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jian RUAN ,  Mingshu DU ,  Shenzhi TANG ,  Shichao LI ,  Yanhua LU ,  Wei ZHANG

IPC: G01R31/387 ,  H02J7/00 ,  G01R31/36 ,  H01M10/42 ,  H01M10/48

CPC classification number: G01R31/387 ,  H02J7/0048 ,  G01R31/3648 ,  H01M10/425 ,  H01M10/48 ,  H01M2010/4278

Abstract: A method and device for determining an available capacity of a battery, a battery management system, and a storage medium, relating to the field of battery technologies. The method includes: obtaining the at least one DOD interval corresponding to the SOC interval of the operation of the battery, and the number of cycles and the cycle temperature corresponding to the at least one DOD interval; obtaining a recoverable amount of capacity fade of the battery according to the at least one DOD interval, the number of cycles and the cycle temperature, and determining an actual available capacity of the battery.

公开(公告)号：US20230095453A1

公开(公告)日：2023-03-30

申请号：US17053151

申请日：2020-06-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Mingshu DU ,  Shichao LI ,  Shenzhi TANG ,  Jian RUAN ,  Yanhua LU ,  Wei ZHANG

IPC: G01R31/3842 ,  G01R19/165 ,  G01R31/367

Abstract: Provided is a method and an apparatus for determining a state of charge of a battery, a battery management system and a storage medium, and relates to the field of battery technologies, where the method includes: obtaining a current OCV value of a battery and cumulative continuous charging or discharging capacity information of the battery; obtaining SOC credible information based on the current OCV value and the cumulative continuous charging or discharging capacity information; obtaining a corrected SOC value corresponding to the current OCV value according to the SOC credible information. According to the present disclosure, accuracy of SOC correction could be improved by determining the SOC credible information under the current OCV; for batteries, especially those with a hysteresis characteristic, accuracy of SOC estimation could be improved, an error of SOC estimation could be reduced and reliability of battery and experience of users could be improved.

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.

公开(公告)号：US20220276310A1

公开(公告)日：2022-09-01

申请号：US17745921

申请日：2022-05-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jian RUAN ,  Mingshu Du ,  Shichao LI ,  Shenzhi TANG ,  Yanhua LU ,  Wei ZHANG

IPC: G01R31/36 ,  G01R31/388 ,  G01R31/396

Abstract: The present disclosure discloses a method for identifying a cell, including: determining, for a cell under test during a charge and discharge process, a number N of measured values of OCV and a number N of net cumulative throughputs corresponding to the number N of measured values of OCV; for an ith target cell, obtaining a number N of calculated values of OCV corresponding to the number N of measured values of OCV, and obtaining an OCV mean square error between the number N of measured values of OCV and the number N of calculated values of OCV; and determining that the cell under test is the ith target cell, when the OCV mean square error between the cell under test and the ith target cell is a minimum mean square error among a number M of OCV mean square errors.

公开(公告)号：US20220247197A1

公开(公告)日：2022-08-04

申请号：US17562883

申请日：2021-12-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chenling ZHENG ,  Yanhua LU ,  Jinbo CAI ,  Bingtuan LUO

IPC: H02J7/00 ,  H02J3/32

Abstract: Embodiments of this application provide an energy storage device and system as well as a power system, and relate to the technical field of a power grid. The energy storage device includes: at least two parallel-connected energy storage units, where each energy storage unit includes: a battery cluster and a power conversion system; and the battery cluster includes at least two cells; a direct-current side of the power conversion system is electrically connected to the battery cluster, an alternating-current side of the power conversion system is configured to electrically connect to an input side of an alternating-current combiner cabinet, and an output side of the alternating-current combiner cabinet is configured to electrically connect to an alternating-current side of a transformer. The energy storage device is configured to improve safety and reliability of the energy storage system.

公开(公告)号：US20220207976A1

公开(公告)日：2022-06-30

申请号：US17505965

申请日：2021-10-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiangxiang XU ,  Chenling ZHENG ,  Yanhua LU ,  Ying LIU ,  Guojin ZHOU

IPC: G08B17/10 ,  H02J7/00

Abstract: Embodiments of this application provide a fire-fighting switch device and a fire-fighting system, which are applied to the field of fire-fighting. The fire-fighting switch device includes a plurality of fire detection switch units, where the fire detection switch unit includes one or more fire detection switches, the one or more fire detection switches form at least one switch path, the fire detection switch is configured to turn on when a fire is detected, and any one of the switch paths is configured to transmit a voltage signal to a fire-extinguishing device when all of the fire detection switches on the switch path are turned on. In this solution, when a fire is detected by one fire detection switch unit, the fire-extinguishing device can be controlled to extinguish the fire provided that all fire detection switches on one switch path in the fire detection switch unit are turned on.

公开(公告)号：US20210146794A1

公开(公告)日：2021-05-20

申请号：US17042965

申请日：2019-11-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jian RUAN ,  Shichao LI ,  Yanhua LU ,  Yizhen HOU ,  Wei ZHANG

IPC: B60L53/62 ,  H02J7/00 ,  B60L58/12 ,  B60L58/16 ,  B60L53/66

Abstract: The present application discloses a charging method, an apparatus, a device, a medium, a battery management system and a charging pile. The method includes: acquiring a charging demand parameter set by a user; calculating, according to the charging demand parameter and acquired actual operation state information of a battery, a target charging scheme for charging the battery; transmitting, according to the target charging scheme, a first charging request to a charging device, so that the charging device charges the battery according to the first charging request. According to the charging method, the apparatus, the device, medium, the battery management system and the charging pile provided in the embodiments of the present application, personalized smart charging can be achieved for different users.

公开(公告)号：US20200319257A1

公开(公告)日：2020-10-08

申请号：US16910977

申请日：2020-06-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qiang YUN ,  Yushuai SHI ,  Yanhua LU

IPC: G01R31/3842 ,  G01R31/367 ,  G01R31/392 ,  G01R31/36 ,  G01R31/387 ,  G01R31/396 ,  G01R31/50

Abstract: A method and device for estimating remaining available energy of a power battery is provided. The method includes: estimating, under current state, maximum available energy of a first cell with minimum State of Charge (SOC), and maximum available energy of a second cell with minimum of maximum available capability in the power battery; estimating remaining available energy of the first cell based on its maximum available energy and SOC, and estimating remaining available energy of the second cell based on its maximum available energy and SOC; and estimating the remaining available energy of the power battery based on the number of cells included in the power battery and the smaller one of the remaining available energy between the first and the second cell.

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.

公开(公告)号：US20210116513A1

公开(公告)日：2021-04-22

申请号：US17135179

申请日：2020-12-28

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Mingshu DU ,  Shichao LI ,  Jian RUAN ,  Shenzhi TANG ,  Yanhua LU ,  Wei ZHANG

IPC: G01R31/392 ,  G01R31/3842 ,  H02J7/00 ,  H01M10/42

Abstract: This application discloses a method for correcting a SOH, an apparatus, a battery management system and a storage medium, where the method includes: obtaining a relationship curve between a ratio of an accumulated charge/discharge capacity variation and a corresponding voltage-parameter variation of a battery cell and a voltage parameter itself; determining a valid peak point on the relationship curve; determining a SOH calibration value corresponding to voltage parameter datum at the valid peak point; correcting a current SOH according to the SOH calibration value. The estimation accuracy of the SOH can be improved according to this application.