Patents by Inventor Baohai DU
Baohai DU 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: 11867748Abstract: This application discloses an electrical control device detection circuit, a detection method, and an electric vehicle. The detection circuit includes a drive circuit configured to detect an electrical control device. The drive circuit includes a drive power module, a high-side switch unit, and a low-side switch unit. The detection circuit includes: a detection power module, a first switch module, a second switch module, 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 a fault occurs in the drive circuit of the electrical control device.Type: GrantFiled: December 15, 2021Date of Patent: January 9, 2024Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Baohai Du, Changjian Liu, Yanhui Fu
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Patent number: 11448683Abstract: A circuit includes: an isolation power module, a first and second sampling modules, a first and second sampling points, a processor. A first terminal of the first sampling module is connected to a positive electrode of a battery pack and first terminal of a positive switch module, a second terminal of the first sampling module is connected to a negative electrode of the battery pack and a first terminal of the negative switch module, a third terminal of the first sampling module is connected to a first reference voltage end; a first terminal of the second sampling module is connected to a second terminal of the positive switch module and a positive electrode of the isolation power module, a second terminal of the second sampling module is connected to a second terminal of the negative switch module and a negative electrode of the isolation power module.Type: GrantFiled: January 15, 2020Date of Patent: September 20, 2022Assignee: Contemporary Amperex Technology Co., LimitedInventors: Baohai Du, Le Chu, Jiayu Yu, Qiandeng Li
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Patent number: 11435389Abstract: Embodiments of this application relate to the technical field of electronics, and disclose an electrical control device detection circuit, a detection method, and an electric vehicle. In some embodiments of this application, the detection circuit is configured to detect a drive circuit of the electrical control device. The drive circuit includes a high-side switch unit. The detection circuit includes a first detection module and a control module. A first end of the first detection module is connected to a first end of the electrical control device. A second end of the first detection module is connected to a second end of the electrical control device. A third end of the first detection module is connected to the control module.Type: GrantFiled: September 30, 2021Date of Patent: September 6, 2022Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Yanhui Fu, Baohai Du, Guoxiu Wu
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Patent number: 11413965Abstract: The application discloses a high voltage interlock circuit and a detection method thereof. The circuit comprises: a first switching module; a second switching module, comprising a first driving unit and a first switching unit arranged in isolation, the first switching unit is arranged between a second power supply and a second power ground; a third switching module, comprising a second driving unit and a second switching unit arranged in isolation; a fourth switching module, arranged between the fourth power supply and the first power ground; a controller. The embodiments of the application improve the accuracy of fault detection.Type: GrantFiled: September 23, 2021Date of Patent: August 16, 2022Assignee: Contemporary Amperex Technology Co., LimitedInventors: Yanhui Fu, Guoxiu Wu, Baohai Du, Changjian Liu
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Patent number: 11404894Abstract: Embodiments of the present disclosure relate to the field of battery technologies, and disclose a pre-charging circuit for a high voltage battery pack and a pre-charging method therefor. In some embodiments of the present disclosure, during a charging process, a control module switches on a charging switching module and switches off a charging pre-charging module after determining that a voltage at the first end of the charging switching module and a voltage at the second end of the charging switching module comply with a first constraint relationship; during a discharging process, the control module switches on the main positive switching module and switches off the main positive pre-charging module after determining that a voltage at the first end of the main positive switching module and a voltage at the second end of the main positive switching module comply with a second constraint relationship.Type: GrantFiled: September 30, 2019Date of Patent: August 2, 2022Assignee: Contemporary Amperex Technology Co., LimitedInventors: Dachun Yang, Baohai Du, Yanhui Fu, Qiandeng Li
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Publication number: 20220107353Abstract: This application discloses an electrical control device detection circuit, a detection method, and an electric vehicle. The detection circuit includes a drive circuit configured to detect an electrical control device. The drive circuit includes a drive power module, a high-side switch unit, and a low-side switch unit. The detection circuit includes: a detection power module, a first switch module, a second switch module, 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 a fault occurs in the drive circuit of the electrical control device.Type: ApplicationFiled: December 15, 2021Publication date: April 7, 2022Inventors: Baohai Du, Changjian Liu, Yanhui Fu
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Publication number: 20220018885Abstract: Embodiments of this application relate to the technical field of electronics, and disclose an electrical control device detection circuit, a detection method, and an electric vehicle. In some embodiments of this application, the detection circuit is configured to detect a drive circuit of the electrical control device. The drive circuit includes a high-side switch unit. The detection circuit includes a first detection module and a control module. A first end of the first detection module is connected to a first end of the electrical control device. A second end of the first detection module is connected to a second end of the electrical control device. A third end of the first detection module is connected to the control module.Type: ApplicationFiled: September 30, 2021Publication date: January 20, 2022Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Yanhui FU, Baohai DU, Guoxiu WU
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Publication number: 20220009351Abstract: The application discloses a high voltage interlock circuit and a detection method thereof. The circuit comprises: a first switching module; a second switching module, comprising a first driving unit and a first switching unit arranged in isolation, the first switching unit is arranged between a second power supply and a second power ground; a third switching module, comprising a second driving unit and a second switching unit arranged in isolation; a fourth switching module, arranged between the fourth power supply and the first power ground; a controller. The embodiments of the application improve the accuracy of fault detection.Type: ApplicationFiled: September 23, 2021Publication date: January 13, 2022Applicant: Contemporary Amperex Technology Co., LimitedInventors: Yanhui FU, Guoxiu Wu, Baohai Du, Changjian Liu
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Patent number: 11095132Abstract: Embodiments of the present disclosure disclose a battery management system. In the system, a first microcontroller is connected to a second microcontroller; a battery monitoring module is configured to monitor a state of the battery pack and transmit the state of the battery pack to the first and the second microcontroller respectively via a state signal of the battery pack, and control the state of the battery pack according to a control instruction from the first and the second microcontroller; a sampling control module is configured to detect the state of a high voltage loop of the battery pack, and transmit the state of the high voltage loop to the first and the second microcontroller respectively via a state signal of the high voltage loop of the battery pack, and control the state of the high voltage loop according to a control instruction from the first and the second microcontroller.Type: GrantFiled: September 30, 2019Date of Patent: August 17, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Huixiu Luo, Baohai Du, Wei Zhang, Qiandeng Li
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Publication number: 20210231726Abstract: A circuit includes: an isolation power module, a first sampling module, a first sampling point, a second sampling module, a second sampling point, a processor. A first terminal of the first sampling module is connected to a positive electrode of a battery pack and first terminal of a positive switch module, a second terminal of the first sampling module is connected to a negative electrode of the battery pack and a first terminal of the negative switch module, a third terminal of the first sampling module is connected to a first reference voltage end; a first terminal of the second sampling module is connected to a second terminal of the positive switch module and a positive electrode of the isolation power module, a second terminal of the second sampling module is connected to a second terminal of the negative switch module and a negative electrode of the isolation power module.Type: ApplicationFiled: January 15, 2020Publication date: July 29, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Baohai DU, Le CHU, Jiayu YU, Qiandeng LI
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Patent number: 10969419Abstract: The present disclosure provides an insulation detection circuit, a detection method and a battery management system. The insulation detection circuit includes an isolated power module, first positive and negative sampling modules, second positive and negative sampling modules, and a processor. A first end of the second positive sampling module is connected to a positive electrode of the isolated power module and a second end of the positive switch module, a second end of the second positive sampling module is connected to a second reference voltage terminal; a first end of the second negative sampling module is connected to the second reference voltage terminal, a second end of the second negative sampling module is respectively connected to a negative electrode of the isolated power module and a second end of the negative switch module; and the processor is connected to sampling points.Type: GrantFiled: September 20, 2019Date of Patent: April 6, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Baohai Du, Guoxiu Wu, Weiqiang Li, Qiandeng Li
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Publication number: 20200274369Abstract: Embodiments of the present disclosure disclose a battery management system. In the system, a first microcontroller is connected to a second microcontroller; a battery monitoring module is configured to monitor a state of the battery pack and transmit the state of the battery pack to the first and the second microcontroller respectively via a state signal of the battery pack, and control the state of the battery pack according to a control instruction from the first and the second microcontroller; a sampling control module is configured to detect the state of a high voltage loop of the battery pack, and transmit the state of the high voltage loop to the first and the second microcontroller respectively via a state signal of the high voltage loop of the battery pack, and control the state of the high voltage loop according to a control instruction from the first and the second microcontroller.Type: ApplicationFiled: September 30, 2019Publication date: August 27, 2020Inventors: Huixiu LUO, Baohai DU, Wei ZHANG, Qiandeng LI
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Publication number: 20200235586Abstract: Embodiments of the present disclosure relate to the field of battery technologies, and disclose a pre-charging circuit for a high voltage battery pack and a pre-charging method therefor. In some embodiments of the present disclosure, during a charging process, a control module switches on a charging switching module and switches off a charging pre-charging module after determining that a voltage at the first end of the charging switching module and a voltage at the second end of the charging switching module comply with a first constraint relationship; during a discharging process, the control module switches on the main positive switching module and switches off the main positive pre-charging module after determining that a voltage at the first end of the main positive switching module and a voltage at the second end of the main positive switching module comply with a second constraint relationship.Type: ApplicationFiled: September 30, 2019Publication date: July 23, 2020Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Dachun YANG, Baohai DU, Yanhui FU, Qiandeng LI
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Publication number: 20200225275Abstract: The present disclosure provides an insulation detection circuit, a detection method and a battery management system. The insulation detection circuit includes an isolated power module, first positive and negative sampling modules, second positive and negative sampling modules, and a processor. A first end of the second positive sampling module is connected to a positive electrode of the isolated power module and a second end of the positive switch module, a second end of the second positive sampling module is connected to a second reference voltage terminal; a first end of the second negative sampling module is connected to the second reference voltage terminal, a second end of the second negative sampling module is respectively connected to a negative electrode of the isolated power module and a second end of the negative switch module; and the processor is connected to sampling points.Type: ApplicationFiled: September 20, 2019Publication date: July 16, 2020Applicant: Contemporary Amperex Technology Co., LimitedInventors: Baohai DU, Guoxiu WU, Weiqiang LI, Qiandeng LI