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公开(公告)号：US20220113344A1
公开(公告)日：2022-04-14
申请号：US17557285
申请日：2021-12-21
发明人： Meng LI , Changjian LIU , Fuming YE , Fangjie ZHOU , Liansong WANG , Lidan YAN
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.
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2.发明申请公开(公告)号：US20220229112A1
公开(公告)日：2022-07-21
申请号：US17585326
申请日：2022-01-26
发明人： Yanhui FU , Le CHU , Changjian LIU
IPC分类号： G01R31/327 , G01R31/52 , G01R31/00 , G05B23/02
摘要： This application relates to the technical field of electronics, and discloses a detection circuit and a detection method of an electrical control device, and an electric vehicle. In some embodiments of this application, the detection circuit includes a drive circuit configured to detect an electrical control device. The drive circuit includes a drive power module and a low-side switch unit. The detection circuit includes: a first detection module, a second detection module, and a control module. The control module is configured to obtain an electrical signal at a third end of the first detection module, and/or an electrical signal at a second end of the second detection module; and determine, based on the electrical signal at the third end of the first detection module, and/or the electrical signal at the second end of the second detection module, whether the drive circuit of the electrical control device is faulty.
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公开(公告)号：US20200006955A1
公开(公告)日：2020-01-02
申请号：US16382778
申请日：2019-04-12
发明人： Fupeng CAI , Fuming YE , Qiandeng LI , Changjian LIU
摘要： A battery pack management system includes a controller, an isolation unit, a plurality of battery pack management units, and a plurality of battery packs. The plurality of battery pack management units are connected in series by a first daisy chain, and the plurality of battery pack management units are also connected in series by a second daisy chain. The first daisy chain transmits sampled data that is collected by the battery pack management units from corresponding battery packs and transmits control instructions of the controller. The second daisy chain transmits a failure prompt signal which is generated by a battery pack management unit that detects a failure. A first battery pack management unit and a last battery pack management unit of the plurality of battery pack management units connected in series are connected to the controller through the isolation unit.
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公开(公告)号：US20220255546A1
公开(公告)日：2022-08-11
申请号：US17732569
申请日：2022-04-29
发明人： Jirong HUO , Yanhui FU , Changjian LIU , Le CHU
摘要： Embodiments of this application relate to the field of electricity, and disclose a drive circuit. In some embodiments of this application, the drive circuit includes a high-side driver module and a delay module, the delay module is configured to output a delay signal of preset duration to the high-side driver module in a case that a control module is being reset; and the high-side driver module is configured to: according to the delay signal of preset duration, remain in a first state within the preset duration, the first state being the same as a second state; where the second state is a working state of the high-side driver module before the control module is reset, and the second state includes being on or off.
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公开(公告)号：US20200025833A1
公开(公告)日：2020-01-23
申请号：US16286557
申请日：2019-02-26
发明人： Fuming YE , Fupeng CAI , Qiandeng LI , Changjian LIU
IPC分类号： G01R31/396 , G01R31/367
摘要： The disclosure discloses a sampling detection circuit and a method for detecting a circuit malfunction. The method includes: receiving a detection instruction and controlling a plurality of equalization modules to be turned off in response to the detection instruction; collecting first sampled data of sampled equalization modules; controlling odd numbered equalization modules among the sampled equalization modules to be turned on and even numbered equalization modules among the sampled equalization modules to be turned off; collecting second sampled data of the sampled equalization modules; controlling the odd numbered equalization modules among the sampled equalization modules to be turned off and the even numbered equalization modules among the sampled equalization modules to be turned on; collecting third sampled data of the sampled equalization modules; and determining, according to the first sampled data, second sampled data and third sampled data, a malfunction in a sampling detection circuit and locating the malfunction.
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