Patents by Inventor Yizhen Hou
Yizhen Hou 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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Publication number: 20210116486Abstract: Provided is a method and device for obtaining internal side and external side insulation resistances of a relay. The method includes: controlling an insulation resistance obtaining circuit to output an AC signal; when both a main relay and a pre-charge relay are switched off, obtaining a first phase shift of the AC signal between two sampling points according to first collected electrical signals; obtaining an internal side insulation resistance of the main relay according to the first collected electrical signals and the first phase shift; controlling the pre-charge relay to be switched on; when the main relay is switched off and the pre-charge relay is switched on, obtaining a second phase shift of the AC signal between the two sampling points according to second collected electrical signals; and obtaining an external side insulation resistance of the main relay according to the second collected electrical signals and the second phase shift.Type: ApplicationFiled: December 28, 2020Publication date: April 22, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Zhimin DAN, Yizhen Hou, Weiping Sun, Meng Li, Wei Zhang, Teng Yu
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Patent number: 10985575Abstract: The present disclosure provides a thermal runaway detection circuit and a method, which is directed to field of batteries. The circuit includes: a sensing module including a terminating resistor; a detection module including a first voltage dividing resistor set and a second voltage dividing resistor set; and a processing module connected to the detection module, wherein the processing module is configured to obtain thermal runaway detection data, and determine whether thermal runaway occurs in the battery pack based on the thermal runaway detection data. The thermal runaway detection data includes first sampled data and second sampled data. The technical solutions in the present disclosure can improve safety of the battery pack.Type: GrantFiled: August 29, 2019Date of Patent: April 20, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Zhimin Dan, Chao Zeng, Xiao Wang, Jia Xu, Yizhen Hou, Wei Zhang, Guoliang Hu
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Publication number: 20210111443Abstract: This application provides a method, an apparatus, a system for detecting battery thermal runaway, and a battery management unit. The method includes: obtaining an output signal of an air pressure sensor located in a battery pack, and obtaining parameter information of the battery pack; determining state information of the air pressure sensor based on the output signal of the air pressure sensor; and generating an alarm signal indicating occurrence of thermal runaway in the battery pack based on the state information of the air pressure sensor and the parameter information of the battery pack. In this application, the thermal runaway detection for the battery pack may be implemented by considering parameter information of both the air pressure sensor and the battery pack, improving the reliability of the thermal runaway detection for the battery pack, reducing the probability of false positives and false negatives, and improving driving safety.Type: ApplicationFiled: December 22, 2020Publication date: April 15, 2021Inventors: Xiao WANG, Chao ZENG, Jia XU, Zhimin DAN, Yizhen HOU, Wei ZHANG, Guoliang HU
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Publication number: 20210104903Abstract: This application discloses a protection circuit associated with a battery management system (BMS). The protection circuit includes a first protection module and a freewheeling module. The first protection module is connected in parallel to a first switch module of the BMS, and the freewheeling module is connected in parallel to a load module of the BMS. The first protection module switches to a charging state when the first switch module is turned off to stabilize a voltage between a first terminal of the first switch module and a second terminal of the first switch module. The freewheeling module is turned on when the first switch module is turned off to stabilize a voltage between the first switch module and the second switch module. The protection circuit mitigates risks of breakdown of the first switch module, and prevents a parasitic inductance from limiting a switching frequency of the first switch module.Type: ApplicationFiled: December 15, 2020Publication date: April 8, 2021Inventors: Wei Zhang, Zhimin Dan, Jinbo Cai, Yizhen Hou, Meilin Chen
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Patent number: 10971771Abstract: The present disclosure provides a battery heating system and a control method thereof. The battery heating system includes a main positive switch, a main negative switch, an inverter, a motor, and a battery management unit. The inverter includes a first phase bridge arm, a second phase bridge arm and a third phase bridge arm connected in parallel. A motor controller in the inverter is configured to output a drive signal to a target upper-bridge-arm switch unit and a target lower-bridge-arm switch unit, so as to control the target upper-bridge-arm switch unit and the target lower-bridge-arm switch unit to be periodically turned on and off. The battery management unit is configured to collect state parameters of the battery pack. When the state parameters of the battery pack meet preset heating conditions, a control signal is sent to the motor controller to control the motor controller to output the drive signal.Type: GrantFiled: March 8, 2019Date of Patent: April 6, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Zhimin Dan, Xiyang Zuo, Wei Zhang, Yizhen Hou, Guowei Li, Xingyuan Wu, Yanru Li
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Patent number: 10957947Abstract: The present invention provides a high-voltage detection circuit, detector, battery device and vehicle, the high-voltage detection circuit includes: a controller including a first signal input port, a second signal input port, and a signal output port; a current detection sub-circuit for sampling a current signal of internal side of a main negative switch and for transmitting the current signal to the first signal input port; a switch detection sub-circuit, a first end of the switch detection sub-circuit being configured to sample a first electric signal of external side of a to-be-detected switch, and a second end of the switch detection sub-circuit being configured to transmit the first electric signal to the second signal input port; and a switch driving sub-circuit, configured for sampling a switch control signal via the signal output port and generating a switch driving signal according to the switch control signal.Type: GrantFiled: October 22, 2018Date of Patent: March 23, 2021Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITEDInventors: Zhimin Dan, Yizhen Hou, Zhanyu Sun, Jiechao Luo, Jia Xu
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Patent number: 10957950Abstract: The present application discloses a heating module, a heating method for a battery module, and a heating system. The heating module includes: an energy storage unit, a first switch unit, a second switch unit and a control unit. The energy storage unit, a first battery unit in a battery module and the first switch unit may form a first heating loop; the energy storage unit, a second battery unit in the battery module, and the second switch unit may form a second heating loop. The control unit may control the first switch unit or the second switch unit, so as to sequentially switch on, between the first heating loop and the second heating loop, a heating loop where a battery unit with a higher state of charge is located and a heating loop where a battery unit with a lower state of charge is located.Type: GrantFiled: November 17, 2020Date of Patent: March 23, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Yizhen Hou, Xiyang Zuo, Zhimin Dan, Wei Zhang, Xingyuan Wu, Taosheng Zhu
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Publication number: 20210075073Abstract: The present application discloses a heating module, a heating method for a battery module, and a heating system. The heating module includes: an energy storage unit, a first switch unit, a second switch unit and a control unit. The energy storage unit, a first battery unit in a battery module and the first switch unit may form a first heating loop; the energy storage unit, a second battery unit in the battery module, and the second switch unit may form a second heating loop. The control unit may control the first switch unit or the second switch unit, so as to sequentially switch on, between the first heating loop and the second heating loop, a heating loop where a battery unit with a higher state of charge is located and a heating loop where a battery unit with a lower state of charge is located.Type: ApplicationFiled: November 17, 2020Publication date: March 11, 2021Inventors: Yizhen Hou, Xiyang Zuo, Zhimin Dan, Wei Zhang, Xingyuan Wu, Taosheng Zhu
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Publication number: 20210072336Abstract: A measurement device includes: a host computer and a current source, wherein the host computer is configured to: control, when ambient temperature of a current detection device is at a preset temperature within an operation temperature range of a shunt of the current detection device, the current source to output a current with a preset current value to the current detection device; receive a calibrated current value sent by the current detection device; calculate a measurement error of the current detection device according to the preset current value and the calibrated current value; and instruct, when the measurement error is less than a preset current error, the current detection device to use the predetermined current calibration coefficient as a current calibration coefficient.Type: ApplicationFiled: November 20, 2020Publication date: March 11, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Yizhen Hou, Zhimin Dan, Wei Zhang, Jia Xu
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Publication number: 20210075069Abstract: A battery pack system, a control method thereof and a management device are provided. A battery pack is connected in series with a discharge circuit unit and a charge circuit unit; a battery management unit is to monitor a temperature of the battery pack, to periodically send, when the temperature of the battery pack is lower than a threshold, a turn-on-instruction to the discharge circuit unit and the charge circuit unit alternately to control the discharge circuit unit and the charge circuit unit to be alternately turned on in heating cycles; the discharge circuit unit is to be turned on according to the turn-on-instruction to enable electricity of the battery pack to flow into the energy storage unit in discharging-phase; and the charge circuit unit is to be turned on according to the turn-on-instruction to enable electricity of the energy storage unit to flow into the battery pack in charging-phase.Type: ApplicationFiled: November 20, 2020Publication date: March 11, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Xiyang ZUO, Zhimin DAN, Wei ZHANG, Yizhen HOU, Teng YU, Wenbin LU, Xingyuan WU, Taosheng ZHU
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Patent number: 10938628Abstract: The present disclosure provides a battery management system and a communication method. The method includes: determining, by a main BMU, from a plurality of managed units a fault unit that communicates abnormally with the main BMU, and transmitting, by the main BMU, to a backup BMU a fault frequency at which the fault unit communicates abnormally with the main BMU; selecting, by the backup BMU, from the managed units a managed unit that communicates normally with the backup BMU and the fault unit as a target unit; transmitting, by the backup BMU, frequency-conversion information to the fault unit through the target unit based on the fault frequency; converting, by the fault unit, its frequency to a frequency; transmitting the frequency to the main BMU if the backup BMU communicates normally with the fault unit using the frequency; and communicating, by the main BMU, with the fault unit using the frequency.Type: GrantFiled: August 14, 2019Date of Patent: March 2, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Zhimin Dan, Wenbin Lu, Wei Zhang, Yizhen Hou, Jia Xu, Jiechao Luo, Teng Yu
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Patent number: 10928459Abstract: The present disclosure provides a battery detection circuit and a battery management system. The battery detection circuit includes a positive relay, a negative relay, a first positive sampling unit, a first negative sampling unit, a second positive sampling unit, a second negative sampling unit, and a reference voltage terminal, wherein: all of the first positive sampling unit, the first negative sampling unit, the second positive sampling unit, the second negative sampling unit and a power battery pack to be detected are connected to the reference voltage terminal. With the battery detection circuit and the battery management system of the present disclosure, both the cost of the battery detection circuit and the complexity of the structure of the battery detection circuit can be reduced.Type: GrantFiled: August 27, 2018Date of Patent: February 23, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Zhanyu Sun, Zhimin Dan, Yizhen Hou, Jiechao Luo, Wei Zhang
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Publication number: 20210050719Abstract: The present application provides an electric protection circuit, which relates to the field of battery power. The electric protection circuit includes a battery pack, a main positive switch, a load device and a main negative switch connected in series. The main positive switch and/or the main negative switch include at least one semiconductor switch. The main positive switch and/or the main negative switch in the electric protection circuit are connected in parallel to a protection module, which absorbs electric energy across two terminals of the main positive switch and/or the main negative switch when the main positive switch and/or the main negative switch are turned off. The technical solution of the present application can improve the safety of the electric protection circuit.Type: ApplicationFiled: December 6, 2019Publication date: February 18, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Jinbo CAI, Zhimin DAN, Wei ZHANG, Yizhen HOU, Xiong ZHENG
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Publication number: 20210043990Abstract: The present disclosure provides a battery heating system and a control method thereof. The battery heating system includes a main positive switch, a main negative switch, an inverter, a motor, and a battery management unit. The inverter includes a first phase bridge arm, a second phase bridge arm and a third phase bridge arm connected in parallel. A motor controller in the inverter is configured to output a drive signal to a target upper-bridge-arm switch unit and a target lower-bridge-arm switch unit, so as to control the target upper-bridge-arm switch unit and the target lower-bridge-arm switch unit to be periodically turned on and off. The battery management unit is configured to collect state parameters of the battery pack. When the state parameters of the battery pack meet preset heating conditions, a control signal is sent to the motor controller to control the motor controller to output the drive signal.Type: ApplicationFiled: October 22, 2020Publication date: February 11, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Zhimin DAN, Xiyang ZUO, Wei ZHANG, Yizhen HOU, Guowei LI, Xingyuan WU, Yanru LI
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Publication number: 20210027961Abstract: 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.Type: ApplicationFiled: November 15, 2019Publication date: January 28, 2021Applicant: Contemporary Amperex Technology Co., LimitedInventors: Zhimin DAN, Delong SHI, Yizhen HOU, Wei ZHANG, Liansong WANG
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Patent number: 10895593Abstract: The present disclosure provides a parameter selection method, apparatus, and computer readable storage medium for an insulation detection circuit. The parameter selection method includes determining an allowable injection frequency range of an AC signal to be injected, according to a predetermined resistance range of an insulation resistance of the power battery under test and a predetermined resistance calculation cycle of the insulation resistance; and selecting an output frequency of the signal generation module according to a lowest frequency to be generated by the signal generation module and the allowable injection frequency range.Type: GrantFiled: December 27, 2018Date of Patent: January 19, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Wei Zhang, Zhimin Dan, Yizhen Hou, Meng Li, Weiping Sun, Teng Yu
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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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Patent number: 10886757Abstract: A battery pack system, a control method thereof and a management device are provided. A battery pack is connected in series with a discharge circuit unit and a charge circuit unit; a battery management unit is to monitor a temperature of the battery pack, to periodically send, when the temperature of the battery pack is lower than a threshold, a turn-on-instruction to the discharge circuit unit and the charge circuit unit alternately to control the discharge circuit unit and the charge circuit unit to be alternately turned on in heating cycles; the discharge circuit unit is to be turned on according to the turn-on-instruction to enable electricity of the battery pack to flow into the energy storage unit in discharging-phase; and the charge circuit unit is to be turned on according to the turn-on-instruction to enable electricity of the energy storage unit to flow into the battery pack in charging-phase.Type: GrantFiled: January 9, 2019Date of Patent: January 5, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Xiyang Zuo, Zhimin Dan, Wei Zhang, Yizhen Hou, Teng Yu, Wenbin Lu, Xingyuan Wu, Taosheng Zhu
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Patent number: 10884061Abstract: A relay diagnosis circuit, diagnosis method, and battery management system are disclosed in the present disclosure. The relay diagnosis circuit may include a first sampling unit, a second sampling unit, a first sampling point, a second sampling point, a reference voltage terminal, and a processor. A first end of the first sampling unit is connected with voltage output end of the power battery pack to be measured and a first end of a relay. A second end of the first sampling unit is connected with the reference voltage terminal and the first sampling point. A first end of the second sampling unit is connected with a second end of the relay. A second end of the second sampling unit is connected with the reference voltage terminal and the second sampling point.Type: GrantFiled: August 26, 2018Date of Patent: January 5, 2021Assignee: Contemporary Amperex Technology Co., LimitedInventors: Jiechao Luo, Wei Zhang, Zhanyu Sun, Yizhen Hou, Zhimin Dan
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Publication number: 20200403418Abstract: The present application provides a charge and discharge circuit, and relates to the field of battery power. The charge and discharge circuit comprises: a charge circuit comprising a battery pack, a first switch set and a charging device connected in series; and a discharge circuit comprising the battery pack, a second switch set and an electrical device connected in series; both the first switch set and the second switch set comprise at least one switch, and the at least one switch in the first and/or second switch set is a semiconductor switch.Type: ApplicationFiled: December 6, 2019Publication date: December 24, 2020Applicant: Contemporary Amperex Technology Co., LimitedInventors: Zhimin DAN, Jinbo CAI, Wei ZHANG, Yizhen HOU, Xiong ZHENG