Patents by Inventor Ruichao Tang
Ruichao Tang 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: 20230216324Abstract: A method includes: obtaining a current charging current and voltages of n electrochemical cells; if a difference between a highest voltage in the voltages of the n electrochemical cells and a preset upper limit of a single electrochemical cell charging voltage is less than or equal to a preset difference, determining a derating current, where the preset difference is greater than or equal to 0, the highest voltage is less than or equal to the upper limit of the single electrochemical cell charging voltage, and the derating current is less than the current charging current; and indicating to charge the battery with the derating current.Type: ApplicationFiled: April 27, 2021Publication date: July 6, 2023Inventors: Ruichao Tang, Xingdi Huang
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Publication number: 20220255333Abstract: A battery capacity tracking method and apparatus, and a device are provided. For two batteries connected in series, a first remaining capacity change value corresponding to a first battery when the first battery is switched between a fully charged state and a fully discharged state is obtained; a second remaining capacity change value corresponding to the second battery when the second battery is switched between a fully charged state and a fully discharged state is obtained; and after a remaining capacity change value corresponding to a battery when the battery is switched from one state to another state is obtained, a full charge capacity of the first battery is determined based on the first remaining capacity change value, the second remaining capacity change value, and a full charge capacity of the second battery.Type: ApplicationFiled: April 20, 2022Publication date: August 11, 2022Inventors: Mingwei ZHANG, Ruichao TANG, Yao YUAN, Lihou MA
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Publication number: 20220209551Abstract: This application provides an electronic device, a charging method, and a charging system for charging two batteries connected in series. The charging integrated circuit controls, based on a target voltage corresponding to each preset period, a charging mode for charging the two batteries. As a charging process is prolonged, the voltages of the two batteries gradually increase, and the target voltage obtained varies with each period. A turning point of switching from constant current charging to constant voltage charging is determined based on the target voltage, and the target voltage is related to the minimum voltage value of the two batteries in each preset period. The charging mode is adjusted based on the target voltage corresponding to each preset period instead of a fixed target voltage. This reduces a probability of battery overcharging and improves battery charging reliability.Type: ApplicationFiled: March 15, 2022Publication date: June 30, 2022Applicant: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Mingwei ZHANG, Ruichao TANG, Lihou MA, Hui WANG
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Patent number: 8519676Abstract: A circuit for charging a battery pack includes a transformer and a charger controller. The transformer is operable for receiving an input power and for providing a charging power according to a driving signal to charge the battery pack. The charger controller is operable for monitoring a status of the battery pack, for selecting a charging mode from multiple charging modes according to the status, and for generating the driving signal according to the charging mode to adjust the charging power. The charger controller further executes a state machine that stores data indicating predetermined battery statuses that cause saturation of the transformer, and that selects a protection mode in which said charging power is restricted if the status of the battery pack matches to one of the predetermined battery statuses.Type: GrantFiled: March 6, 2012Date of Patent: August 27, 2013Assignee: O2Micro Inc.Inventors: Guo Xing Li, Jiankui Guo, Xin Dong, Ruichao Tang, Chutao Zheng, Celin He, Songtao Chen
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Patent number: 8405358Abstract: A charging path includes a charging switch for transferring a charging current from an input terminal to an output terminal. The charging path further includes a first enable terminal coupled to the charging switch. The first enable terminal receives a first enable signal to control the charging switch to operate in either a first mode, a second mode, or a third mode, based on a status of the output terminal. More specifically, in the first mode, the charging switch is fully turned off. In the second mode, an equivalent resistance of the charging switch is determined by a control terminal of the charging switch. In the third mode, the charging switch is turned off.Type: GrantFiled: August 26, 2009Date of Patent: March 26, 2013Assignee: O2Micro Inc.Inventors: Guoxing Li, Ruichao Tang, Chutao Zhang
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Patent number: 8222870Abstract: A battery management system includes a monitoring circuit and a charger. The monitoring circuit is operable for monitoring a battery pack that includes a plurality of cells, and for checking an unbalanced condition of the battery pack in each cycle of a plurality of cycles. The charger is operable for controlling a charging current to the battery pack and for receiving monitoring information from the monitoring circuit, and for adjusting the charging current from a first level in a previous cycle to a second level that is lower than the first level in response to a detection of the unbalanced condition in a current cycle.Type: GrantFiled: March 31, 2008Date of Patent: July 17, 2012Assignee: O2Micro, IncInventors: Jiankui Guo, Ruichao Tang, Guoxing Li, Xiaohua Hou, Zhenming Zhang
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Publication number: 20120161717Abstract: A circuit for charging a battery pack includes a transformer and a charger controller. The transformer is operable for receiving an input power and for providing a charging power according to a driving signal to charge the battery pack. The charger controller is operable for monitoring a status of the battery pack, for selecting a charging mode from multiple charging modes according to the status, and for generating the driving signal according to the charging mode to adjust the charging power. The charger controller further executes a state machine that stores data indicating predetermined battery statuses that cause saturation of the transformer, and that selects a protection mode in which said charging power is restricted if the status of the battery pack matches to one of the predetermined battery statuses.Type: ApplicationFiled: March 6, 2012Publication date: June 28, 2012Inventors: Guo Xing LI, Jiankui GUO, Xin DONG, Songtao CHEN, Ruichao TANG, Chutao ZHANG, Celin HE
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Patent number: 8143862Abstract: A circuit for charging a battery pack includes a power converter and a charger controller. The power converter is operable for receiving an input power, and for providing a charging power for charging the battery pack. The power converter provides galvanic isolation between input circuitry and output circuitry of the circuit. The input circuitry shares a first ground potential with the input power, and the output circuitry shares a second ground potential with the charging power. The charger controller in the input circuitry includes a modulator for generating a driving signal to drive the power converter and control the charging power.Type: GrantFiled: March 12, 2009Date of Patent: March 27, 2012Assignee: 02Micro Inc.Inventors: Guo Xing Li, Jiankui Guo, Xin Dong, Songtao Chen, Ruichao Tang, Chutao Zheng, Celin He
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Patent number: 8111038Abstract: An electronic system in a vehicle includes a motor, a charger, a battery pack, and a bus. The motor drives wheels and propellers of the vehicle. The charger generates charging power according to a control signal. The battery pack coupled to the charger and the motor is operable for generating the control signal based upon a status of each cell of multiple cells in the battery pack, for receiving the charging power via a charging path when the vehicle is stalled, and for powering the motor via a discharging path when the vehicle is started. The bus coupled to the charger and the battery pack is operable for transmitting the control signal from the battery pack to the charger.Type: GrantFiled: September 20, 2010Date of Patent: February 7, 2012Assignee: O2 Micro, IncInventors: Shaolan Wang, Wei Zhang, Ruichao Tang
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Publication number: 20110006731Abstract: An electronic system in a vehicle includes a motor, a charger, a battery pack, and a bus. The motor drives wheels and propellers of the vehicle. The charger generates charging power according to a control signal. The battery pack coupled to the charger and the motor is operable for generating the control signal based upon a status of each cell of multiple cells in the battery pack, for receiving the charging power via a charging path when the vehicle is stalled, and for powering the motor via a discharging path when the vehicle is started. The bus coupled to the charger and the battery pack is operable for transmitting the control signal from the battery pack to the charger.Type: ApplicationFiled: September 20, 2010Publication date: January 13, 2011Inventors: Shaolan WANG, Wei ZHANG, Ruichao TANG
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Publication number: 20100231174Abstract: A circuit for charging a battery pack includes a power converter and a charger controller. The power converter is operable for receiving an input power, and for providing a charging power for charging the battery pack. The power converter provides galvanic isolation between input circuitry and output circuitry of the circuit. The input circuitry shares a first ground potential with the input power, and the output circuitry shares a second ground potential with the charging power. The charger controller in the input circuitry includes a modulator for generating a driving signal to drive the power converter and control the charging power.Type: ApplicationFiled: March 12, 2009Publication date: September 16, 2010Inventors: Guo Xing LI, Jiankui GUO, Xin DONG, Songtao CHEN, Ruichao TANG, Chutao ZHANG, Celin HE
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Publication number: 20100052624Abstract: A charging path includes a charging switch for transferring a charging current from an input terminal to an output terminal. The charging path further includes a first enable terminal coupled to the charging switch. The first enable terminal receives a first enable signal to control the charging switch to operate in either a first mode, a second mode, or a third mode, based on a status of the output terminal. More specifically, in the first mode, the charging switch is fully turned off. In the second mode, an equivalent resistance of the charging switch is determined by a control terminal of the charging switch. In the third mode, the charging switch is turned off.Type: ApplicationFiled: August 26, 2009Publication date: March 4, 2010Inventors: Guoxing LI, Ruichao TANG, Chutao ZHANG
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Publication number: 20080218130Abstract: A battery management system includes a monitoring circuit and a charger. The monitoring circuit is operable for monitoring a battery pack that includes a plurality of cells, and for checking an unbalanced condition of the battery pack in each cycle of a plurality of cycles. The charger is operable for controlling a charging current to the battery pack and for receiving monitoring information from the monitoring circuit, and for adjusting the charging current from a first level in a previous cycle to a second level that is lower than the first level in response to a detection of the unbalanced condition in a current cycle.Type: ApplicationFiled: March 31, 2008Publication date: September 11, 2008Inventors: Jiankui Guo, Ruichao Tang, Guoxing Li, Xiaohua Hou, Zhenming Zhang
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Publication number: 20080218127Abstract: A battery management system comprises a control circuit and an adapter. The control circuit can be used to generate a control signal according to a status of each cell of a plurality of cells in a battery pack. The adapter receives the control signal and charges the battery pack. An output power of the adapter is adjusted according to the control signal.Type: ApplicationFiled: June 20, 2007Publication date: September 11, 2008Inventors: Han-Jung Kao, Jiankui Guo, Liusheng Liu, Ruichao Tang, Guoxing Li, Xiaohua Hou, Zhengming Zhang