公开(公告)号：US10985575B2

公开(公告)日：2021-04-20

申请号：US16555006

申请日：2019-08-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhimin Dan ,  Chao Zeng ,  Xiao Wang ,  Jia Xu ,  Yizhen Hou ,  Wei Zhang ,  Guoliang Hu

IPC: H02J7/00 ,  G01R31/382 ,  G01R31/364 ,  G01K7/02

Abstract: The present disclosure provides a thermal runaway detection circuit and a method, which is directed to field of batteries. The circuit includes: a sensing module including a terminating resistor; a detection module including a first voltage dividing resistor set and a second voltage dividing resistor set; and a processing module connected to the detection module, wherein the processing module is configured to obtain thermal runaway detection data, and determine whether thermal runaway occurs in the battery pack based on the thermal runaway detection data. The thermal runaway detection data includes first sampled data and second sampled data. The technical solutions in the present disclosure can improve safety of the battery pack.

公开(公告)号：US20210104903A1

公开(公告)日：2021-04-08

申请号：US17122955

申请日：2020-12-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Wei Zhang ,  Zhimin Dan ,  Jinbo Cai ,  Yizhen Hou ,  Meilin Chen

IPC: H02J7/00

Abstract: This application discloses a protection circuit associated with a battery management system (BMS). The protection circuit includes a first protection module and a freewheeling module. The first protection module is connected in parallel to a first switch module of the BMS, and the freewheeling module is connected in parallel to a load module of the BMS. The first protection module switches to a charging state when the first switch module is turned off to stabilize a voltage between a first terminal of the first switch module and a second terminal of the first switch module. The freewheeling module is turned on when the first switch module is turned off to stabilize a voltage between the first switch module and the second switch module. The protection circuit mitigates risks of breakdown of the first switch module, and prevents a parasitic inductance from limiting a switching frequency of the first switch module.

公开(公告)号：US10957947B2

公开(公告)日：2021-03-23

申请号：US16166448

申请日：2018-10-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhimin Dan ,  Yizhen Hou ,  Zhanyu Sun ,  Jiechao Luo ,  Jia Xu

IPC: H01M10/48 ,  B60L58/10 ,  B60L50/60 ,  G01R19/165 ,  H01M10/42 ,  G01R31/36 ,  B60L3/00 ,  H03K17/082

Abstract: The present invention provides a high-voltage detection circuit, detector, battery device and vehicle, the high-voltage detection circuit includes: a controller including a first signal input port, a second signal input port, and a signal output port; a current detection sub-circuit for sampling a current signal of internal side of a main negative switch and for transmitting the current signal to the first signal input port; a switch detection sub-circuit, a first end of the switch detection sub-circuit being configured to sample a first electric signal of external side of a to-be-detected switch, and a second end of the switch detection sub-circuit being configured to transmit the first electric signal to the second signal input port; and a switch driving sub-circuit, configured for sampling a switch control signal via the signal output port and generating a switch driving signal according to the switch control signal.

公开(公告)号：US10886757B2

公开(公告)日：2021-01-05

申请号：US16243373

申请日：2019-01-09

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xiyang Zuo ,  Zhimin Dan ,  Wei Zhang ,  Yizhen Hou ,  Teng Yu ,  Wenbin Lu ,  Xingyuan Wu ,  Taosheng Zhu

IPC: H02J7/00 ,  H01M10/42 ,  H01M10/44 ,  H01M10/48

Abstract: A battery pack system, a control method thereof and a management device are provided. A battery pack is connected in series with a discharge circuit unit and a charge circuit unit; a battery management unit is to monitor a temperature of the battery pack, to periodically send, when the temperature of the battery pack is lower than a threshold, a turn-on-instruction to the discharge circuit unit and the charge circuit unit alternately to control the discharge circuit unit and the charge circuit unit to be alternately turned on in heating cycles; the discharge circuit unit is to be turned on according to the turn-on-instruction to enable electricity of the battery pack to flow into the energy storage unit in discharging-phase; and the charge circuit unit is to be turned on according to the turn-on-instruction to enable electricity of the energy storage unit to flow into the battery pack in charging-phase.

公开(公告)号：US10761118B2

公开(公告)日：2020-09-01

申请号：US16112720

申请日：2018-08-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yizhen Hou ,  Zhanyu Sun ,  Zhimin Dan ,  Jiechao Luo ,  Wei Zhang

IPC: G01R19/165 ,  G01R19/25 ,  G01R31/36

Abstract: The present disclosure provides a battery high voltage sampling circuit and a battery management system. The battery high voltage sampling circuit includes a positive relay, a negative relay, a first positive sampling unit, a first negative sampling unit and a reference voltage terminal, wherein: a first terminal of the positive relay is connected to a positive electrode of a power battery pack to be detected, a first terminal of the negative relay is connected to a negative electrode of the power battery pack to be detected, and both of the first positive sampling unit and the first negative sampling unit are connected to the reference voltage terminal.

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.

公开(公告)号：US20190118668A1

公开(公告)日：2019-04-25

申请号：US16166448

申请日：2018-10-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhimin Dan ,  Yizhen Hou ,  Zhanyu Sun ,  Jiechao Luo ,  Jia Xu

IPC: B60L11/18 ,  H01M10/48 ,  H01M10/42 ,  G01R19/165

Abstract: The present invention provides a high-voltage detection circuit, detector, battery device and vehicle, the high-voltage detection circuit includes: a controller including a first signal input port, a second signal input port, and a signal output port; a current detection sub-circuit for sampling a current signal of internal side of a main negative switch and for transmitting the current signal to the first signal input port; a switch detection sub-circuit, a first end of the switch detection sub-circuit being configured to sample a first electric signal of external side of a to-be-detected switch, and a second end of the switch detection sub-circuit being configured to transmit the first electric signal to the second signal input port; and a switch driving sub-circuit, configured for sampling a switch control signal via the signal output port and generating a switch driving signal according to the switch control signal.