Patents by Inventor Wellington Kwok

Wellington Kwok 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: 11152800
    Abstract: A device may cause constant voltage pulse charging of a battery by a battery charger. The device may determine a first voltage value associated with the battery and may cause, based on the first voltage value satisfying a voltage value threshold, the constant voltage pulse charging of the battery to pause for a first period of time. The device may determine, after the first period of time, a second voltage value associated with the battery and may cause, based on the second voltage value satisfying the voltage value threshold, the constant voltage pulse charging of the battery to pause for a second period of time. The device may determine, after the second period of time, a third voltage value associated with the battery and may cause, based on the third voltage value satisfying the voltage value threshold, the constant voltage pulse charging of the battery to cease.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: October 19, 2021
    Assignee: Caterpillar Inc.
    Inventor: Wellington Kwok
  • Publication number: 20200343743
    Abstract: A device may cause constant voltage pulse charging of a battery by a battery charger. The device may determine a first voltage value associated with the battery and may cause, based on the first voltage value satisfying a voltage value threshold, the constant voltage pulse charging of the battery to pause for a first period of time. The device may determine, after the first period of time, a second voltage value associated with the battery and may cause, based on the second voltage value satisfying the voltage value threshold, the constant voltage pulse charging of the battery to pause for a second period of time. The device may determine, after the second period of time, a third voltage value associated with the battery and may cause, based on the third voltage value satisfying the voltage value threshold, the constant voltage pulse charging of the battery to cease.
    Type: Application
    Filed: April 29, 2019
    Publication date: October 29, 2020
    Applicant: Caterpillar Inc.
    Inventor: Wellington KWOK
  • Publication number: 20140175886
    Abstract: A power system includes a prime mover configured to generate a drive force and a generator configured to receive the drive force and be driven by the prime mover to produce electrical power. The power system further includes a connection configured to receive the electrical power from the generator and direct the electrical power to an external load, a power storage device arranged in series with the connection between the generator and the external load, the power storage device configured to store electrical power from the generator or to discharge power to the external load, and a controller to control the power storage device. The Controller configured to determine a supply of electrical power and a demand for electrical power by the external load, the controller being further configured to control the power storage device. A method is also disclosed.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 26, 2014
    Applicant: Caterpillar Inc.
    Inventors: Wellington Kwok, Andrew Knitt, Dachuan Yu
  • Publication number: 20140158340
    Abstract: The present disclosure relates to cooling an energy storage module using passive and active cooling techniques. Passive cooling is provided by storing heat in a phase change material that is contact with the energy storage cells of the energy storage module. Active cooling is provided by circulating coolant through coolant passages that are in thermal contact with the energy storage cells. A control system for determining the temperature of the energy storage module and controlling coolant flow when the temperature reaches a predetermined threshold is disclosed.
    Type: Application
    Filed: December 11, 2012
    Publication date: June 12, 2014
    Applicant: Caterpillar Inc.
    Inventors: Keith Dixler, Wellington Kwok