公开(公告)号：US10890711B2

公开(公告)日：2021-01-12

申请号：US16940252

申请日：2020-07-27

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhimin Dan ,  Meng Li ,  Yizhen Hou ,  Wei Zhang ,  Lidan Yan

IPC: G01R27/02 ,  F21V8/00

Abstract: The present disclosure provides an insulation detection circuit and method, and a battery management system. The circuit includes a first isolation module, a voltage division module, a signal generation module, first and second sampling points and a processor. A first end of the first isolation module is connected to a power battery, and a second end of the first isolation module is connected to the second sampling point. The signal generation module is connected to the first sampling point and configured to inject an AC signal into the power battery and provide the first sampling point with a first sampled signal. A first end of the voltage division module is connected to the first sampling point, and a second end of the voltage division module is connected to the second sampling point. The processor is configured to calculate an insulation resistance of the power battery.

公开(公告)号：US11923712B2

公开(公告)日：2024-03-05

申请号：US18320035

申请日：2023-05-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhanliang Li ,  Huanle Zhou ,  Meng Li ,  Xiyang Zuo ,  Yu Yan ,  Zhimin Dan

IPC: H02J7/00 ,  H01M10/04 ,  H01M10/44

CPC classification number: H02J7/0068 ,  H01M10/0404 ,  H01M10/446 ,  H02J2207/20

Abstract: A battery formation apparatus includes a DC-DC conversion module, an additional power supply, and a control circuit. Low-voltage and high-voltage terminals of the DC-DC conversion module are electrically connected to the control circuit and a DC bus, respectively. The DC-DC conversion module is configured to, when a battery unit discharges into the battery formation apparatus, convert a first voltage input into a second voltage greater than the first voltage, and output the second voltage. The additional power supply is electrically connected to the control circuit, and configured to output an additional voltage. The control circuit is electrically connected to the battery unit, the low-voltage terminal of the DC-DC conversion module, and the additional power supply. The control circuit is configured to serially connect the low-voltage terminal of the DC-DC conversion module, the battery unit, and the additional power supply when the battery unit discharges into the battery formation apparatus.

公开(公告)号：US11852670B2

公开(公告)日：2023-12-26

申请号：US17557285

申请日：2021-12-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Meng Li ,  Changjian Liu ,  Fuming Ye ,  Fangjie Zhou ,  Liansong Wang ,  Lidan Yan

IPC: G01R31/00 ,  G01R31/14 ,  G01R31/382 ,  B60L58/10 ,  G01R27/02 ,  G01R31/36 ,  H01M10/42

CPC classification number: G01R31/14 ,  B60L58/10 ,  G01R27/025 ,  G01R31/3648 ,  G01R31/382 ,  H01M10/425 ,  H01M2010/4271 ,  H01M2220/20

Abstract: Embodiments of this application relate to the monitoring field, and disclose a method for monitoring an insulation monitoring circuit and a battery management system. In some embodiments of this application, the method for monitoring an insulation monitoring circuit includes: in a state in which a first switch and a second switch are closed and a third switch is open, obtaining a first electrical signal detected by a second monitoring module; and based on the first electrical signal and a voltage reference value between a positive electrode of a battery pack and a negative electrode of the battery pack, determining whether an insulation monitoring circuit is faulty; or obtaining a second electrical signal detected by a first monitoring module and a third electrical signal detected by a third monitoring module, and based on the second electrical signal and the third electrical signal, determining whether the insulation monitoring circuit is faulty.

公开(公告)号：US11262413B2

公开(公告)日：2022-03-01

申请号：US17051184

申请日：2020-01-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Meng Li ,  Zhimin Dan ,  Weiping Sun ,  Yizhen Hou ,  Wei Zhang

IPC: G01R31/389 ,  G01R31/364 ,  G01R31/36

Abstract: The present application provides an insulation detection circuit, a method and a battery management system. The circuit includes: a first voltage dividing module, where, one end of the first voltage dividing module is connected to a positive electrode of a power battery to be detected, and the other end of the first voltage dividing module is connected to a first isolation module and a second voltage dividing module respectively; the second voltage dividing module, connected to a negative electrode of the power battery to be detected; the first isolation module, connected to one end of a sampling module; the sampling module, where, the other end of the sampling module is connected to one end of a signal generating module; the signal generating module, where, the other end of the signal generating module is connected to power ground; and the processing module.

公开(公告)号：US20190237815A1

公开(公告)日：2019-08-01

申请号：US16245198

申请日：2019-01-10

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhimin DAN ,  Meng Li ,  Yizhen Hou ,  Wei Zhang ,  Lidan Yan

IPC: H01M10/42 ,  G01R27/02 ,  G01R31/382 ,  H01M10/48 ,  G01R31/396

Abstract: The present disclosure provides an insulation detection circuit and method, and a battery management system. The circuit includes a first isolation module, a voltage division module, a signal generation module, first and second sampling points and a processor. A first end of the first isolation module is connected to a power battery, and a second end of the first isolation module is connected to the second sampling point. The signal generation module is connected to the first sampling point and configured to inject an AC signal into the power battery and provide the first sampling point with a first sampled signal. A first end of the voltage division module is connected to the first sampling point, and a second end of the voltage division module is connected to the second sampling point. The processor is configured to calculate an insulation resistance of the power battery.

公开(公告)号：US20190235013A1

公开(公告)日：2019-08-01

申请号：US16233095

申请日：2018-12-27

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei Zhang ,  Zhimin Dan ,  Yizhen Hou ,  Meng Li ,  Weiping Sun ,  Teng Yu

IPC: G01R31/12 ,  G01R31/02 ,  G01R31/389 ,  G01R31/3835

CPC classification number: G01R31/1263 ,  G01R27/025 ,  G01R31/007 ,  G01R31/025 ,  G01R31/3835 ,  G01R31/389

Abstract: The present disclosure provides a parameter selection method, apparatus, and computer readable storage medium for an insulation detection circuit. The parameter selection method includes determining an allowable injection frequency range of an AC signal to be injected, according to a predetermined resistance range of an insulation resistance of the power battery under test and a predetermined resistance calculation cycle of the insulation resistance; and selecting an output frequency of the signal generation module according to a lowest frequency to be generated by the signal generation module and the allowable injection frequency range.