Patents by Inventor Lidan Yan
Lidan Yan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11852670Abstract: 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.Type: GrantFiled: December 21, 2021Date of Patent: December 26, 2023Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Meng Li, Changjian Liu, Fuming Ye, Fangjie Zhou, Liansong Wang, Lidan Yan
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Patent number: 11824170Abstract: Embodiments of this application relate to the field of circuit technologies. A wake-up circuit and a rechargeable device are disclosed. The wake-up circuit includes an input control module, a drive module, and an output control module. The input control module, the drive module, and the output control module each are connected to an auxiliary power supply. The input control module is configured to output a first level signal when an external voltage signal is received. The drive module is configured to, when the first level signal is received, output a second level signal that lasts for a first preset time. The output control module is configured to, when the second level signal is received, output a wake-up signal that lasts for the first preset time to a battery management system. According to this application, the wake-up circuit and the BMS consume less power of the auxiliary power supply.Type: GrantFiled: December 24, 2020Date of Patent: November 21, 2023Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Xin He, Zhiwei Yan, Fupeng Cai, Lidan Yan, Fuming Ye, Fangjie Zhou
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Publication number: 20220113344Abstract: 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.Type: ApplicationFiled: December 21, 2021Publication date: April 14, 2022Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Meng LI, Changjian LIU, Fuming YE, Fangjie ZHOU, Liansong WANG, Lidan YAN
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Publication number: 20210119271Abstract: Embodiments of this application relate to the field of circuit technologies. A wake-up circuit and a rechargeable device are disclosed. The wake-up circuit includes an input control module, a drive module, and an output control module. The input control module, the drive module, and the output control module each are connected to an auxiliary power supply. The input control module is configured to output a first level signal when an external voltage signal is received. The drive module is configured to, when the first level signal is received, output a second level signal that lasts for a first preset time. The output control module is configured to, when the second level signal is received, output a wake-up signal that lasts for the first preset time to a battery management system. According to this application, the wake-up circuit and the BMS consume less power of the auxiliary power supply.Type: ApplicationFiled: December 24, 2020Publication date: April 22, 2021Inventors: Xin He, Zhiwei Yan, Fupeng Cai, Lidan Yan, Fuming Ye, Fangjie Zhou
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Patent number: 10890711Abstract: 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.Type: GrantFiled: July 27, 2020Date of Patent: January 12, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Zhimin Dan, Meng Li, Yizhen Hou, Wei Zhang, Lidan Yan
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Publication number: 20200358139Abstract: 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.Type: ApplicationFiled: July 27, 2020Publication date: November 12, 2020Applicant: Contemporay Amperex Technology Co., LimitedInventors: Zhimin DAN, Meng LI, Yizhen HOU, Wei ZHANG, Lidan YAN
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Patent number: 10763552Abstract: 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.Type: GrantFiled: January 10, 2019Date of Patent: September 1, 2020Assignee: Contemporary Amperex Technology Co., LimitedInventors: Zhimin Dan, Meng Li, Yizhen Hou, Wei Zhang, Lidan Yan
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Publication number: 20190237815Abstract: 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.Type: ApplicationFiled: January 10, 2019Publication date: August 1, 2019Applicant: Contemporary Amperex Technology Co., LimitedInventors: Zhimin DAN, Meng Li, Yizhen Hou, Wei Zhang, Lidan Yan