公开(公告)号：US20220121262A1

公开(公告)日：2022-04-21

申请号：US17566723

申请日：2021-12-31

申请人： Contemporary Amperex Technology Co., Limited

发明人： Liansong WANG ,  Zhimin DAN ,  Fupeng CAI ,  Yizhen HOU ,  Wei ZHANG

IPC分类号： G06F1/3212 ,  G06F1/16

摘要： This application discloses a power supply guarantee system and method. The power supply guarantee system is applied to a battery management system. The power supply guarantee system includes: a main control module, configured to send a received wake-up time to a timing device; a high voltage power module, configured to power the timing device according to electrical energy in a high voltage battery pack; the timing device, configured to set a wake-up clock according to the wake-up time, start timing when the BMS enters sleep, and send a discharge instruction to the high voltage battery pack when the timing reaches the wake-up time; and a power conversion module, configured to convert high voltage electrical energy into low voltage electrical energy, and use the low voltage electrical energy to power the BMS, where the high voltage electrical energy is output by the high voltage battery pack according to the discharge instruction.

公开(公告)号：US20220113344A1

公开(公告)日：2022-04-14

申请号：US17557285

申请日：2021-12-21

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Meng LI ,  Changjian LIU ,  Fuming YE ,  Fangjie ZHOU ,  Liansong WANG ,  Lidan YAN

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

摘要： 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：US20210027961A1

公开(公告)日：2021-01-28

申请号：US16981260

申请日：2019-11-15

申请人： Contemporary Amperex Technology Co., Limited

发明人： Zhimin DAN ,  Delong SHI ,  Yizhen HOU ,  Wei ZHANG ,  Liansong WANG

IPC分类号： H01H47/32 ,  B60L3/00 ,  B60L50/60 ,  H01H47/18 ,  H01H47/00

摘要： The embodiments of the present disclosure disclose a relay holding circuit and a battery management system. the relay holding circuit may include: a high-voltage isolated power source, a power source driving module, and a microprocessor of a battery management system; the high-voltage isolated power source may be respectively connected to two electrodes of a battery pack, an output terminal of the power source driving module, the microprocessor, and a first terminal of a first switching device; an input terminal of the power source driving module may be connected to the microprocessor; the microprocessor may be further connected to a primary battery, the microprocessor may output a low-level signal to the power source driving module when the primary battery supplies power abnormally.