Patents by Inventor Dezhong Yang

Dezhong Yang 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).

  • Patent number: 10923938
    Abstract: A charging device for charging an electric energy storage device includes a power supply circuit connected to a power supply, an alternating current conversion circuit configured to convert a current from the power supply connected to the power supply circuit to a first alternating current with a preset frequency value, a transformer configured to convert the first alternating current to a second alternating current, wherein a voltage value corresponding to the second alternating current being less than a voltage value corresponding to the first alternating current, and a direct current voltage conversion circuit configured to convert the second alternating current to a direct current with a waveform fluctuating in a preset range, so as to charge an electric energy storage device.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: February 16, 2021
    Assignee: Nanjing Chervon Industry Co., Ltd.
    Inventors: Dezhong Yang, Yingdian Xiang, Hong Zhu, Zhijian Lu
  • Publication number: 20210044248
    Abstract: A power tool has a functional component, a motor, a power supply module, a controller and a drive circuit including a first drive terminal and a second drive terminal respectively electrically connected to a first power terminal and a second power terminal of the power supply module, multiple high-side switches wherein high-side terminals of the high-side switches are respectively electrically connected to the first drive terminal, and multiple low-side switches wherein low-side terminals of the low-side switches are respectively electrically connected to the second drive terminal. The controller is configured to output a first control signal to one high-side switch to place it in an on or off state and output a second control signal to one low-side switch to place it in the other state. The low-side terminal of one high-side switch is connected to the high-side terminal of one low-side switch.
    Type: Application
    Filed: October 27, 2020
    Publication date: February 11, 2021
    Inventors: Hongwei Wang, Dezhong Yang, Yongan Sun
  • Publication number: 20210021144
    Abstract: A battery pack is detachably connectable to an electric tool or a charger and includes a housing, a cell group, a first voltage monitoring module, a control module, a second voltage monitoring module and a protection module. The cell group includes a plurality of cells electrically connected to each other. The first voltage monitoring module monitors at least one of the voltage of each cell or the total voltage of the cell group. The second voltage monitoring module monitors the voltage of each cell to detect whether the cells are in an overvoltage state. The protection module is electrically connected to the second voltage monitoring module and when the second voltage monitoring module monitors that any one of the cells is in the overvoltage state, cuts off a charging path formed between the battery pack and the charger.
    Type: Application
    Filed: October 1, 2020
    Publication date: January 21, 2021
    Inventors: Zheng Geng, Hehan Liu, Dezhong Yang
  • Publication number: 20200412286
    Abstract: A controller of a power tool is configured to, based on a sampled current of a motor of the power tool, output control signals that change with a change of a position of a rotor of the motor to control a drive circuit of the power tool such that an input voltage and/or a current of the motor changes approximately in a sine wave.
    Type: Application
    Filed: September 9, 2020
    Publication date: December 31, 2020
    Inventors: Yanqing Xu, Hongwei Wang, Xiaogang Ding, Tiantian Yin, Dezhong Yang, Xiubo Dai, Wenqi Zhen
  • Publication number: 20200390031
    Abstract: A riding lawn mower includes a chassis, a power output assembly, a walking assembly, a power supply device, a control module, and an operating apparatus. The operating apparatus includes at least one bracket, an operating lap bar assembly, a pivoting assembly, and a position detecting module. The pivoting assembly mounts the operating lap bar of the operating lap bar assembly on the bracket. The operating lap bar can rotate around different positions in a first direction F1 and/or a second direction F2. The position detecting module includes a magnetic element and a magnetic sensor. The magnetic element is provided on the pivoting assembly or the bracket and the magnet sensor is spaced from the magnetic element so that the magnetic element and the magnetic sensor can generate a relative movement for detecting the position of the operating lap bar in the first direction F1 and/or the second direction F2.
    Type: Application
    Filed: August 26, 2020
    Publication date: December 17, 2020
    Inventors: Dezhong Yang, Jicun Cai, Xiubo Dai, Zhen Wang, Toshinari Yamaoka, Dingming Meng
  • Publication number: 20200384664
    Abstract: A power tool includes a function member, a motor, a driving circuit electrically connected to the motor to drive the motor, and a first control module configured to output a first control signal to the driving circuit. The first control module has a first working state and a first failure state. The first control module outputs a first working signal when the first control module is in the first working state, and outputs a first failure signal when the first control module is in the first failure state. A second control module is electrically connected to the first control module to receive the first working signal or the first failure signal from the first control module. The second control module outputs a second control signal to turn off the motor when the second control module receives the first failure signal from the first control module.
    Type: Application
    Filed: June 9, 2020
    Publication date: December 10, 2020
    Inventors: Dezhong Yang, Jifeng Feng, Li Pan
  • Publication number: 20200358303
    Abstract: A measuring method for a portable electrical energy system includes acquiring a total capacity and an initial electric quantity percentage of each battery pack, detecting a discharging current and a discharging time of each battery pack, calculating a discharging capacity of each battery pack, calculating a remaining electric quantity of each battery pack; calculating a real-time electric quantity percentage of each battery pack; acquiring an open circuit voltage of each battery pack and a real-time internal resistance of a cell unit of each battery pack; calculating a remaining electric quantity of each battery pack; and calculating a remaining electric quantity of the portable electrical energy system.. This method can reduce the calculation error of the remaining electric quantity and improve the battery utilization.
    Type: Application
    Filed: June 9, 2020
    Publication date: November 12, 2020
    Inventors: Dezhong Yang, Jingru Zhang, Hong Zhu, Qing Gao
  • Publication number: 20200301696
    Abstract: An electrical device includes a housing, at least one adapter interface to enable one or more battery packs to be detachably mounted to the electrical device, a control module, and a communication module including a wireless communication module and a storage module. The storage module is used for storing an upgrade file from an external device. The upgrade file includes an upgrade program to update the program of the control module. The communication module is configured to receive the upgrade file from the external device through a wireless communication module, store the upgrade file in the storage module, and send the upgrade file to the control module to update the program of the control module if preset conditions are met.
    Type: Application
    Filed: May 29, 2020
    Publication date: September 24, 2020
    Inventors: Dezhong Yang, Zhao Hu, Dongyue Wang, Yang Wang, Yunfeng Hu
  • Publication number: 20200295408
    Abstract: A battery pack includes a housing, a battery cell group accommodated in the housing, a plurality of battery pack connection terminals coupled to the connection terminals of an electrical device, including a battery pack positive power terminal electrically connected to a negative pole of the battery cell group, a battery pack negative power terminal electrically connected to a positive pole of the battery cell group, a first battery pack terminal to transmit a first type of data, and a second battery pack terminal to transmit a second type of data. Also, a data transmission method between the battery pack and the electrical device enables data collection for data analysis while ensuring normal operation of the battery pack and the electrical device.
    Type: Application
    Filed: May 29, 2020
    Publication date: September 17, 2020
    Inventors: Dezhong Yang, Zhao Hu, Dongyue Wang, Yang Wang, Yunfeng Hu
  • Patent number: 10770993
    Abstract: A duty ratio under different working conditions is determined according to an analysis of a characteristic parameter x of a motor of a power tool and then a drive circuit is controlled with the duty ratio to drive the motor to operate. It is only needed to calculate the duty ratio without needing to make any variable to the circuit hardware or the mechanical structure of the power tool. That is, the duty ratio can be adjusted to achieve optimized control of the motor, thereby optimizing the working performance such as an output torque of the power tool.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: September 8, 2020
    Assignee: Nanjing Chervon Industry Co., Ltd.
    Inventors: Weipeng Chen, Dezhong Yang, Wencheng Li
  • Publication number: 20200275605
    Abstract: An intelligent mowing system includes a base station to receive at least one kind of satellite positioning signal sent by a satellite system at a fixed location and an intelligent lawn mower. A mobile station group is mounted on the intelligent lawn mower and communicated with the base station to receive at least one kind of satellite positioning signal sent by the satellite system during a walking process of the intelligent lawn mower. The mobile station group includes at least a first mobile station and a second mobile station arranged at intervals that determines the position of the intelligent lawn mower. A controller is configured to control the intelligent lawn mower to generally walk within a predetermined line width.
    Type: Application
    Filed: May 15, 2020
    Publication date: September 3, 2020
    Inventors: Weipeng Chen, Hongwei Wang, Dezhong Yang, Weibin Kou
  • Publication number: 20200275604
    Abstract: An intelligent lawn mower includes a cutting blade for cutting grass, a deck for supporting the cutting blade, at least one wheel rotatably supporting the deck, a first drive motor to provide torque to the at least one wheel, a mowing path generation module to set multiple target positions on a first virtual boundary and a second virtual boundary of a mowable area boundary according to a preset path and generate a mowing path from the target positions, and a controller electrically connected to or communicated with a display interface and the mowing path generation module to control the intelligent lawn mower to perform mowing tasks along the mowing path generated by the mowing path generation module.
    Type: Application
    Filed: May 11, 2020
    Publication date: September 3, 2020
    Inventors: Weipeng Chen, Hongwei Wang, Dezhong Yang, Weibin Kou
  • Patent number: 10742053
    Abstract: A power tool includes a power connection terminal, a power system, a main control switch, and a power supply protection circuit. A power supply path is disposed between the power connection terminal and the power system. The main control switch and the power supply protection circuit are configured to control the power supply path to be completed or broken. During the use of the tool, the power tool is not restarted if the main control switch is turned on before an external power source that meets a power supply requirement is connected.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: August 11, 2020
    Assignee: Nanjing Chevron Industry Co., Ltd.
    Inventors: Dezhong Yang, Haiyan Li, Weipeng Chen
  • Publication number: 20200242436
    Abstract: A power tool system includes a power tool; a battery pack detachably connected to the power tool, and a cloud server capable of wirelessly communicating with the power tool. The power tool includes a wireless communication unit configured to establish a wireless communication link with an external device and a file storage unit coupled to the wireless communication unit and configured to store content data in a preset data structure. The preset data structure includes a packet header configured for information transmission, a packet tail including a check bit, and a data packet body including a data length, a data type, a packet serial number, data content and an electronic serial number. A simple and efficient method of deduplicating data is used to release the memory space of the memory and improve data transmission efficiency.
    Type: Application
    Filed: April 16, 2020
    Publication date: July 30, 2020
    Inventors: Dezhong Yang, Zhao HU, Dongyue Wang, Yang Wang, Yunfeng Hu
  • Publication number: 20200233658
    Abstract: A power tool system includes a power tool and a cloud sever configured to receive an upgrading file for upgrading the power tool. The power tool is adapted for wireless communication with the cloud server and includes a motor, a driving module for driving the motor, a control module for outputting a control signal to the driving module, and an IoT module for establishing a wireless communication link between the power tool and the cloud server. The IoT module, the driving module and control module share a bus, and the upgrading file is simultaneously distributed to the control module and/or the driving module through the bus.
    Type: Application
    Filed: April 9, 2020
    Publication date: July 23, 2020
    Inventors: Dezhong Yang, Zhao HU, Dongyue Wang, Yang Wang, Yunfeng Hu
  • Publication number: 20200228044
    Abstract: An electric power tool includes: a motor; a driving circuit configured to drive the motor to output motive power; a control module configured to control the driving circuit; an energy storage element connected to the driving circuit; a current limiting element connected in series with the energy storage element and configured to charge the energy storage element with a first current; a switching element electrically connected in series with the energy storage element, connected in parallel with the current limiting element, and configured to charge or discharge the energy storage element with a second current. The electric power tool can avoid the occurrence of adverse situations such as generating electric sparks at the connection terminals of the electric power tool and of a battery pack when the battery pack is inserted into the electric power tool.
    Type: Application
    Filed: December 24, 2019
    Publication date: July 16, 2020
    Inventors: Dezhong Yang, Chao Xian, QingXiao Mei, Yuwei Yang, Tianxiao Xu
  • Publication number: 20190393475
    Abstract: An electrical combination includes a battery pack and a power tool. The battery pack includes two battery pack connectors which are connected with the same electrode of a battery of the battery pack. A circuit of one battery pack connector has a resistance greater than that in another circuit of another battery pack connector. The power tool includes corresponding tool connectors. When the battery pack is connected with the power tool, the power tool is supplied with a small current by the battery pack firstly, and then is supplied with a large current, so the electric spark is eliminated when the terminals of the battery pack contact with the terminals of the power tool.
    Type: Application
    Filed: September 6, 2019
    Publication date: December 26, 2019
    Inventors: Dezhong Yang, Jifeng Feng
  • Patent number: 10476067
    Abstract: An electrical combination with a battery pack and a power tool. The battery pack includes two battery pack connectors which are connected with the same electrode of a battery of the battery pack. A circuit of one battery pack connector has a resistance greater than that in another circuit of another battery pack connector. The power tool includes corresponding tool connectors. When the battery pack is connected with the power tool, the power tool is supplied with a small current by the battery pack firstly, and then is supplied with a large current, so an electric spark is eliminated when the terminals of the battery pack contact with the terminals of the power tool.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: November 12, 2019
    Assignee: CHERVON (HK) LIMITED
    Inventors: Dezhong Yang, Jifeng Feng
  • Publication number: 20190334459
    Abstract: A duty ratio under different working conditions is determined according to an analysis of a characteristic parameter x of a motor of a power tool and then a drive circuit is controlled with the duty ratio to drive the motor to operate. It is only needed to calculate the duty ratio without needing to make any variable to the circuit hardware or the mechanical structure of the power tool. That is, the duty ratio can be adjusted to achieve optimized control of the motor, thereby optimizing the working performance such as an output torque of the power tool.
    Type: Application
    Filed: March 28, 2019
    Publication date: October 31, 2019
    Inventors: Weipeng Chen, Dezhong Yang, Wencheng Li
  • Publication number: 20190207403
    Abstract: A power tool includes a power connection terminal, a power system, a main control switch, and a power supply protection circuit. A power supply path is disposed between the power connection terminal and the power system. The main control switch and the power supply protection circuit are configured to control the power supply path to be completed or broken. During the use of the tool, the power tool is not restarted if the main control switch is turned on before an external power source that meets a power supply requirement is connected.
    Type: Application
    Filed: November 12, 2018
    Publication date: July 4, 2019
    Inventors: Dezhong Yang, Haiyan Li, Weipeng Chen