公开(公告)号：US20240110965A1

公开(公告)日：2024-04-04

申请号：US18528404

申请日：2023-12-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xingchang WANG ,  Wei TIAN ,  Zhiwei YAN ,  Hang MA ,  Fangyou LU

IPC: G01R31/14

CPC classification number: G01R31/14 ,  G01R31/007

Abstract: The present application discloses an insulation sampling circuit. The insulation sampling circuit includes: a first sampling circuit composed of a first sampling module, a first resistor, and a first switch module; a second sampling circuit composed of a second sampling module, a second resistor, and a second switch module; and a voltage withstand module. The first resistor is connected in parallel to the first sampling module; the first switch module is configured to control the first sampling module and/or the first resistor to be connected between a positive bus and a ground wire; the second resistor is connected in parallel to the second sampling module; the second switch module is configured to control the second sampling module and/or the second resistor to be connected between a negative bus and the ground wire; and the voltage withstand module is disposed on the ground wire to disconnect the ground wire.

公开(公告)号：US20230268756A1

公开(公告)日：2023-08-24

申请号：US18086438

申请日：2022-12-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hang MA ,  Xingchang WANG ,  Wei TIAN ,  Fangyou LU

IPC: H02J7/00 ,  H02J7/34 ,  H01M10/46

CPC classification number: H02J7/00712 ,  H02J7/0048 ,  H02J7/00711 ,  H02J7/345 ,  H01M10/46 ,  H02J2207/20

Abstract: The present application discloses a battery pack charging system and its control method. The battery pack charging system includes a battery pack, a charging apparatus, a negative pulse absorbing branch, and a control unit; the negative pulse absorbing branch includes a switch, a power resistor connected in series with the switch, and a supercapacitor connected in series with the power resistor; and the control method includes: monitoring an SOC value of the battery pack in a negative pulse charging process for the battery pack; when the SOC value increases by a preset value, controlling the switch to be closed so that the power resistor and the supercapacitor can absorb discharge energy of the battery pack; and after the closing time of the switch lasts for a preset duration, controlling the switch to be opened so that depolarization speed in the negative pulse charging process may be increased.

公开(公告)号：US20230256862A1

公开(公告)日：2023-08-17

申请号：US18139359

申请日：2023-04-26

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hang MA ,  Wei TIAN ,  Xingchang WANG ,  Zhenhui HUANG ,  Fangyou LU

IPC: B60L58/14 ,  H02J7/00

CPC classification number: B60L58/14 ,  H02J7/00306 ,  B60L2240/30 ,  B60L2240/547

Abstract: A method is applied to the battery management system, and the method may include: detecting a current state of charge of the traction battery; when the current state of charge is less than a first preset state of charge and greater than or equal to a second preset state of charge, and the switcher is in the on state, turning off the switcher; and when the current state of charge is less than the first preset state of charge and greater than or equal to the second preset state of charge, and the switcher is in an off state, if a hardware trigger signal is received, turning on the switcher, where the second preset state of charge is less than the first preset state of charge.