Patents by Inventor Xiaofeng Shen
Xiaofeng Shen 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: 20200346558Abstract: A battery equalization method includes: obtaining a voltage value of a to-be-equalized cell in a battery pack; obtaining a reference voltage value required for equalization; determining a target equalization duration of the to-be-equalized cell according to a voltage value of the to-be-equalized cell, the reference voltage value, and a preset equalization duty cycle, where the equalization duty cycle is a ratio of an equalization period in a unit cycle to the unit cycle, and the unit cycle includes the equalization period and a sampling period; and controlling equalization of the to-be-equalized cell in the equalization period in the unit cycle according to the target equalization duration. According to this method, sampling is separated from equalization in a unit cycle, thereby ensuring accuracy of collected battery information, making the calculated equalization duration relatively accurate, and improving equalization effects of the battery pack.Type: ApplicationFiled: August 31, 2018Publication date: November 5, 2020Applicant: BYD COMPANY LIMITEDInventors: Hongbin LUO, Chao WANG, Xiaofeng SHEN, Qiuyong ZENG, Yuanhong LIU, Xiang ZHANG
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Publication number: 20200254902Abstract: The present application discloses a battery equalization system, a vehicle, a battery equalization method, and a storage medium. The battery equalization system includes: a collection circuit; an equalization circuit; a controller, connected to the collection circuit and the equalization circuit; and a power supply branch circuit, controlled by the controller to get connected to a power supply unit and the battery equalization system when a vehicle is in an OFF gear and a cell needs enabling of equalization, so that the power supply unit supplies power to the battery equalization system.Type: ApplicationFiled: August 31, 2018Publication date: August 13, 2020Applicant: BYD COMPANY LIMITEDInventors: Hongbin LUO, Chao WANG, Xiaofeng SHEN, Qiuyong ZENG
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Publication number: 20200083815Abstract: A control method includes the following steps: when the DC-DC converter works every time, acquiring total time TC for controlling an H-bridge in a third mode and total time TD for controlling the H-bridge in a fourth mode, and acquiring set time Ti for controlling the H-bridge in the third mode and set time Tm for controlling the H-bridge in the fourth mode in each working cycle during a working process of the DC-DC converter; judging a relation between the TC and the TD; and selecting the mode for controlling the H-bridge when the DC-DC converter is started according to the relation between the total time TC and the total time TD, and alternately controlling the H-bridge according to the Ti and the Tm, the second switch tube, the third switch tube and the fourth switch tube in the H-bridge to be relatively balanced.Type: ApplicationFiled: December 1, 2017Publication date: March 12, 2020Applicant: BYD COMPANY LIMITEDInventors: Ni ZHANG, Xinghui WANG, Chao WANG, Xiaofeng SHEN, Baihe WU
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Patent number: 10291245Abstract: The present invention provides a device and method for correcting error estimation of an analog-to-digital converter.Type: GrantFiled: August 20, 2015Date of Patent: May 14, 2019Assignee: NO. 24 RESEARCH INSTITUTE OF CHINA ELECTRONIC TECHNOLOGYInventors: Jie Pu, Gangyi Hu, Xiaofeng Shen, Xueliang Xu, Dongbing Fu, Ruitao Zhang, Youhua Wang, Yuxin Wang, Guangbing Chen, Ruzhang Li
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Publication number: 20180358976Abstract: A method for an analog-to-digital converter correcting error estimation includes: according to a correction parameter preset initial value, generating a control signal and finely tuning a digital control delay cell, adjusting a delay amount, and correcting a clock phase error between channels; according to a correction parameter initial value, correcting a gain error between channels, generating and buffering a general correction signal, and triggering a counting cell to start counting, and calling the general correction signal in a buffer and generating a preliminary estimation result by using a cyclic correlation method; when counting to a preset value, setting low-pass filter accumulating cell enable ends and a correction parameter updating cell, generating an error estimation result from the preliminary estimation result and latching it, updating a clock correction parameter and a gain correction parameter according to a gradient descent method, and latching them, and resetting to carry out cyclic estimatType: ApplicationFiled: August 20, 2015Publication date: December 13, 2018Applicant: NO. 24 RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATIONInventors: Jie PU, Gangyi HU, Xiaofeng SHEN, Xueliang XU, Dongbing FU, Ruitao ZHANG, Youhua WANG, Yuxin WANG, Guangbing CHEN, Ruzhang LI
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Patent number: 9665511Abstract: A method, an upper computer and a system for programming nodes in a bus network are provided. The method comprises: analyzing a program file to be programmed to obtain data of the program file and a storage address corresponding to the data; broadcasting a routing request message and receiving responding messages returned from a plurality of lower computers, each lower computer corresponding to one node in the bus network; analyzing the responding messages to obtain an operating state of each node among the plurality of layers of nodes; receiving a selected node to be programmed, activating the selected node and transmitting the data and the storage address to a single chip microcomputer corresponding to the selected node when the operating state of each node is a forwarding state; and storing corresponding to the selected node the data in a memory of the single chip microcomputer according to the storage address.Type: GrantFiled: June 21, 2013Date of Patent: May 30, 2017Assignee: BYD COMPANY LIMITEDInventors: Huan Xia, Junlin Gong, Xiaohua Tang, Xiaofeng Shen, Xinghui Wang, Chao Wang
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Patent number: 9583956Abstract: A charging device, a method for controlling a charging device, and a method for detecting a peripheral device are provided. The charging device comprises: a charging gun; a power module; and a controlling module coupled with the charging gun and the power module, wherein the controlling module is configured to determine whether the charging gun is connected with a peripheral device to be charged, and if yes, to control the power module to convert AC electricity to DC electricity to charge the peripheral device. A method for controlling a charging device is also provided. The method comprises: determining whether the charging gun is connected with a peripheral device; and if yes, controlling the power module to convert AC electricity to DC electricity to charge the peripheral device if the charging gun is determined to be connected to the peripheral device.Type: GrantFiled: June 18, 2014Date of Patent: February 28, 2017Assignees: BYD Company Limited, Shenzhen BYD Auto R&D Company LimitedInventors: Xinghui Wang, Jianhua Zhang, Xiaofeng Shen, Kaihua Niu, Xiao Chen, Jianwei Huang, Chaojie Zong, Lin Liu
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Patent number: 9543761Abstract: A method of controlling a home energy control system includes controlling the system to run in at least one of a new energy generating mode, a grid-connected inverter mode and an off-grid inverter mode after mode conflict check. In the new energy generating mode, a new energy generating unit is controlled to generate power to charge an energy storage unit. In the grid-connected inverter mode, the energy storage unit supplies power to a power grid or is charged by the power grid according to the status of the energy storage unit and power consumption of the power grid. In the off-grid inverter mode, household devices are supplied with power from the energy storage unit according to the status of the energy storage unit under the control of an off-grid inverter. A home energy control system is also provided.Type: GrantFiled: March 30, 2011Date of Patent: January 10, 2017Assignees: SHENZHEN BYD AUTO R&D COMPANY LIMITED, BYD COMPANY LIMITEDInventors: Bo Li, Xiaofeng Shen, Jianhua Zhang
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Patent number: 9222986Abstract: A distributed battery management device and a method thereof are provided. The method comprises: receiving, by a battery management control module, a first identification distribution request from a first data acquisition module; activating, by the battery management control module, the first data acquisition module for monitoring one or more batteries; and sending, by the battery management control module, a first identification message corresponding to the first identification distribution request, to the first data acquisition module. The device comprises: a battery management control module; and a first data acquisition module communicatively coupled with the battery management control module, wherein the battery management control module and the first data acquisition module are configured to communicate with each other to identify the data acquisition module.Type: GrantFiled: April 23, 2014Date of Patent: December 29, 2015Assignees: Shenzhen BYD Auto R&D Company Limited, BYD Company LimitedInventors: Xiaofeng Shen, Shuping Li, Jiaojiao Sun, Gang Liu, Haijun Yu
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Publication number: 20150193362Abstract: A method, an upper computer and a system for programming nodes in a bus network are provided. The method comprises: analyzing a program file to be programmed to obtain data of the program file and a storage address corresponding to the data; broadcasting a routing request message and receiving responding messages returned from a plurality of lower computers, each lower computer corresponding to one node in the bus network; analyzing the responding messages to obtain an operating state of each node among the plurality of layers of nodes; receiving a selected node to be programmed, activating the selected node and transmitting the data and the storage address to a single chip microcomputer corresponding to the selected node when the operating state of each node is a forwarding state; and storing corresponding to the selected node the data in a memory of the single chip microcomputer according to the storage address.Type: ApplicationFiled: June 21, 2013Publication date: July 9, 2015Inventors: Huan Xia, Junlin Gong, Xiaohua Tang, Xiaofeng Shen, Xinghui Wang, Chao Wang
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Patent number: 8878603Abstract: A device for detecting a PWM wave, comprising: a PWM wave generating module, configured to generate the PWM wave; a detecting module coupled to the PWM wave generating module, configured to receive the PWM wave and to determine an electric level of the PWM wave; a timer coupled to the detecting module, configured to start a counting when the detecting module receives the PWM wave, and to interrupt the counting when the counting reaches a predetermined value, the detecting module determining whether the electric level of the PWM wave is a high electric level or a low electric level when the counting is interrupted; and a calculating module coupled to the detecting module, configured to calculate a duty ratio of the PWM wave based on a number of high electric level and a number of low electric level of the PWM wave determined within one period of the PWM wave.Type: GrantFiled: June 22, 2012Date of Patent: November 4, 2014Assignees: Shenzhen BYD Auto R&D Company Limited, BYD Company LimitedInventors: Yu Liu, Xiaofeng Shen, Jianhua Zhang
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Patent number: 8853993Abstract: A control system for an in-vehicle solar energy charger, comprising a solar cell panel, a solar energy charger, a starting battery, a power battery and a controller. The solar energy charger, the starting battery and the power battery are electrically connected to the controller respectively. The controller is configured for performing a maximum photovoltaic power tracking algorithm and controlling an output power of the solar energy charger for charging the power battery or starting battery, according to an input power of the solar energy charger.Type: GrantFiled: September 27, 2011Date of Patent: October 7, 2014Assignee: BYD Company LimitedInventors: Zhenjie Wu, Xiaofeng Shen, Jianhua Zhang
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Publication number: 20140292261Abstract: A charging device, a method for controlling a charging device, and a method for detecting a peripheral device are provided. The charging device comprises: a charging gun; a power module; and a controlling module coupled with the charging gun and the power module, wherein the controlling module is configured to determine whether the charging gun is connected with a peripheral device to be charged, and if yes, to control the power module to convert AC electricity to DC electricity to charge the peripheral device. A method for controlling a charging device is also provided. The method comprises: determining whether the charging gun is connected with a peripheral device; and if yes, controlling the power module to convert AC electricity to DC electricity to charge the peripheral device if the charging gun is determined to be connected to the peripheral device.Type: ApplicationFiled: June 18, 2014Publication date: October 2, 2014Inventors: Xinghui WANG, Jianhua ZHANG, Xiaofeng SHEN, Kaihua NIU, Xiao CHEN, Jianwei HUANG, Chaojie ZONG, Lin LIU
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Publication number: 20140236510Abstract: A distributed battery management device and a method thereof are provided. The method comprises: receiving, by a battery management control module, a first identification distribution request from a first data acquisition module; activating, by the battery management control module, the first data acquisition module for monitoring one or more batteries; and sending, by the battery management control module, a first identification message corresponding to the first identification distribution request, to the first data acquisition module. The device comprises: a battery management control module; and a first data acquisition module communicatively coupled with the battery management control module, wherein the battery management control module and the first data acquisition module are configured to communicate with each other to identify the data acquisition module.Type: ApplicationFiled: April 23, 2014Publication date: August 21, 2014Applicants: SHENZHEN BYD AUTO R&D COMPANY LIMITED, BYD COMPANY LIMITEDInventors: Xiaofeng SHEN, Shuping LI, Jiaojiao SUN, Gang LIU, Haijun YU
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Patent number: 8723526Abstract: An internal resistance testing device includes an excitation source and a battery pack, an adjustable resistance R, a sampling unit, and a control unit. The excitation source and the battery pack form a loop circuit. The adjustable resistance R may be located at the loop circuit formed by the excitation source and the battery pack. The sampling unit samples the voltage between two sides of the battery pack, the voltage between two sides of the adjustable resistance R, and the value of the adjustable resistance R. The control unit calculates internal resistance of the battery pack according to the signal value collected by the sampling unit. The internal resistances of different voltage-ranges the battery pack are determined by adjusting the value of the adjustable resistance R to cause the actual excitation voltage to be equal to the range voltage of the sampling unit.Type: GrantFiled: October 19, 2010Date of Patent: May 13, 2014Assignee: BYD Co. Ltd.Inventors: Xiaofeng Shen, Junna Peng
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Patent number: 8531323Abstract: A pipeline A/D converter and its single redundancy bit digital correction are provided. The single redundancy bit digital correction includes the following steps: substages except for the last one quantizes input voltage, calculates the residual voltage, which is amplified and shifted to the middle part of the reference voltage range, and outputs to the following substage until the last one, which only quantizes the input voltage; the code and offset code of each substage corresponding to the quantized thermometer code are calculated; the offset codes of all stages are added by weight to get total offset code; and codes of all substages are added by weight, to which the total offset code is added. The comparator offset error is corrected to obtain an output code which identifies the negative or positive overflow of input signals. The A/D converter adopting the above digital correction is provided.Type: GrantFiled: June 21, 2010Date of Patent: September 10, 2013Assignee: No. 24th Research Institute of China Electronics Technology Group CorpInventors: Ting Li, Yuxin Wang, Xiaofeng Shen, Shutao Zhou, Tao Liu, Mingyuan Xu, Ruzhang Li, Kaiquan He
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Publication number: 20120319795Abstract: A device for detecting a PWM wave, comprising: a PWM wave generating module, configured to generate the PWM wave; a detecting module coupled to the PWM wave generating module, configured to receive the PWM wave and to determine an electric level of the PWM wave; a timer coupled to the detecting module, configured to start a counting when the detecting module receives the PWM wave, and to interrupt the counting when the counting reaches a predetermined value, the detecting module determining whether the electric level of the PWM wave is a high electric level or a low electric level when the counting is interrupted; and a calculating module coupled to the detecting module, configured to calculate a duty ratio of the PWM wave based on a number of high electric level and a number of low electric level of the PWM wave determined within one period of the PWM wave.Type: ApplicationFiled: June 22, 2012Publication date: December 20, 2012Inventors: Yu LIU, Xiaofeng Shen, Jianhua Zhang
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Publication number: 20120316690Abstract: A home energy control system and a controlling method thereof are provided.Type: ApplicationFiled: March 30, 2011Publication date: December 13, 2012Applicants: BYD COMPANY LIMITED, SHENZHEN BYD AUTO R&D COMPANY LIMITEDInventors: Bo Li, Xiaofeng Shen, Jianhua Zhang
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Publication number: 20120074892Abstract: A control system for an in-vehicle solar energy charger, comprising a solar cell panel, a solar energy charger, a starting battery, a power battery and a controller. The solar energy charger, the starting battery and the power battery are electrically connected to the controller respectively. The controller is configured for performing a maximum photovoltaic power tracking algorithm and controlling an output power of the solar energy charger for charging the power battery or starting battery, according to an input power of the solar energy charger.Type: ApplicationFiled: September 27, 2011Publication date: March 29, 2012Inventors: Zhenjie WU, Xiaofeng SHEN, Jianhua ZHANG
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Publication number: 20110279295Abstract: The present invention pertains to the technical field of A/D converter, to be more specific, a pipeline A/D converter and its single redundancy bit digital correction. The related single redundancy bit digital correction features the following steps: substages except for the last one quantizes input voltage, calculates the residual voltage, which is amplified and shifted to the middle part of the reference voltage range, and outputs to the following substage until the last one, which only quantizes the input voltage; The code and offset code of each substage, corresponding to the quantized thermometer code is calculated; the offset codes of all stages are added by weight to get total offset code; codes of all substages are added by weight, to which the total offset code is added.Type: ApplicationFiled: June 21, 2010Publication date: November 17, 2011Applicant: No. 24th Research Institute of China Electronics T echnology Group CorpInventors: Ting Li, Yuxin Wang, Xiaofeng Shen, Shutao Zhou, Tao Liu, Mingyuan Xu, Ruzhang Li, Kaiquan He