Patents by Inventor Chi Chiu TSANG

Chi Chiu TSANG 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).

  • Serial multi-battery charger with independent simultaneous charge and discharge
    Patent number: 9385542
    Abstract: A serial battery charger has a battery matrix with switches that are configured by a microcontroller that reads voltages between batteries to determine if each battery is fully-charged, charging, or absent. A switch configuration allows charging and discharging currents to flow simultaneously, and allows discharging current but blocks charging current from fully-charged batteries to prevent over-charging. The charging current flows through all charging batteries in series while the discharging current flows from all fully-charged and charging batteries in series. Blocking and bypass switches route the charging current to all charging batteries in series, but bypass all fully-charged and absent batteries. The blocking and bypass switches route the discharging current serially through all fully-charged and charging batteries in the battery matrix while avoiding absent batteries. The switches are controlled by the switch configuration from the microcontroller.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: July 5, 2016
    Assignee: Hong Kong Applied Science and Technology Research Institute Company, Limited
    Inventors: Po Wah Chang, Chi Chiu Tsang, Chik Wai (David) Ng, Yuanzhe Xu, Wai Kei Or, Kwok Kuen (David) Kwong
  • Serial Multi-Battery Charger with Independent Simultaneous Charge and Discharge
    Publication number: 20150380959
    Abstract: A serial battery charger has a battery matrix with switches that are configured by a microcontroller that reads voltages between batteries to determine if each battery is fully-charged, charging, or absent. A switch configuration allows charging and discharging currents to flow simultaneously, and allows discharging current but blocks charging current from fully-charged batteries to prevent over-charging. The charging current flows through all charging batteries in series while the discharging current flows from all fully-charged and charging batteries in series. Blocking and bypass switches route the charging current to all charging batteries in series, but bypass all fully-charged and absent batteries. The blocking and bypass switches route the discharging current serially through all fully-charged and charging batteries in the battery matrix while avoiding absent batteries. The switches are controlled by the switch configuration from the microcontroller.
    Type: Application
    Filed: June 26, 2014
    Publication date: December 31, 2015
    Inventors: Po Wah CHANG, Chi Chiu TSANG, Chik Wai (David) NG, Yuanzhe XU, Wai Kei OR, Kwok Kuen (David) KWONG