Patents by Inventor Lei Hao

Lei Hao 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).

  • Publication number: 20250132651
    Abstract: A magnet-free electric machine. The electric machine may include a stator including a first stator winding set and a second stator winding set and a rotor including a first rotor winding set and a second rotor winding set. The electric machine may include a power transfer circuit configured for controlling a polarity and/or a phase sequence of excitation currents used in exciting the first and second stator and rotor windings, and thereby, respectively generated stator and rotor poles.
    Type: Application
    Filed: October 19, 2023
    Publication date: April 24, 2025
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Peng Peng, Thomas W. Nehl, Derek F. Lahr, Alireza Fatemi, Lei Hao, Suresh Gopalakrishnan, Avoki M. Omekanda, Renato Amorim Torres, Mazharul Chowdhury
  • Patent number: 12282069
    Abstract: Systems and methods for diagnosing health of a battery using in-vehicle impedance analysis. The method includes receiving a sensed current measurement for a cell of the battery; generating a current profile as a function of the sensed current measurement, including pulses to a peak current, the pulses having a pulse frequency (w); applying a current with the current profile to the cell; for each pulse in the current profile, receiving a voltage measurement for the cell that is responsive to the pulse, calculating an impedance for the cell responsive thereto, the impedance comprising a real component at the pulse frequency (RZw), and an imaginary component at the pulse frequency (IZw), identifying a battery health problem when either RZw exceeds a preprogrammed first threshold for the pulse frequency, or when IZw exceeds a preprogrammed second threshold for the pulse frequency, and storing the RZw and the IZw for the cell.
    Type: Grant
    Filed: January 13, 2022
    Date of Patent: April 22, 2025
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Yue-Yun Wang, Steven Earl Muldoon, Lei Hao, Michael P Barker
  • Publication number: 20250125434
    Abstract: A method for heating a battery pack of an electrified powertrain system having an electric motor includes determining a temperature of the battery pack. Responsive to the battery temperature being less than a predetermined threshold temperature, the method includes executing a self-heating mode of the battery pack. This includes injecting a high-frequency direct-axis alternating current voltage waveform that minimizes output torque and prevents rotation of a rotor of the electric motor. An AC current waveform is applied to the battery pack as a result of the voltage injection. A controller includes a temperature sensor configured for determining a temperature of the battery pack and a processor configured to perform the method. A motor vehicle includes the controller, an electrified powertrain system having the battery pack and an electric motor, and road wheels connected to and powered by electric motor.
    Type: Application
    Filed: October 11, 2023
    Publication date: April 17, 2025
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Renato Amorim Torres, Suresh Gopalakrishnan, Lei Hao, Chandra S. Namuduri, Vinod Chowdary Peddi
  • Publication number: 20250125647
    Abstract: An electrical system includes a battery, temperature sensor, and battery charging station connectable to the battery and to an alternating current (AC) power supply. The charging station includes connected battery charging and heating circuits. The charging circuit includes a first plurality of power switches configured to rectify an AC input voltage from the power supply into a direct current (DC) voltage for charging the battery during a battery charging mode. The heating circuit includes a voltage bus, transformer, series switch, and a second plurality of power switches downstream of the transformer. The heating circuit generates an AC battery current from the DC voltage and injects the same into the battery during a battery heating mode. An electronic controller controls the power switches and the series switch to perform the charging and heating modes, doing so via a corresponding method.
    Type: Application
    Filed: October 17, 2023
    Publication date: April 17, 2025
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Nicholas W. Pinto, Shuonan Xu, Neeraj S. Shidore, Lei Hao, Chandra S. Namuduri
  • Publication number: 20250112577
    Abstract: Presented are separately excited motor (SEM) drive systems, methods for making/using such systems, and vehicles equipped with such systems. A motor drive system includes a rechargeable battery unit and a multilevel power factor correction (PFC) device interposed between and electrically connecting the battery unit and an electric power source. The battery unit and PFC device are electrically connected via a traction inverter module (TIM) device and a multilevel power transfer circuit (PTC) device. The TIM contains multiple pairs of TIM switches, and the PTC device contains multiple PTC switches. An SEM unit contains a rotor assembly, which includes a rotor core bearing a rotor winding, and a stator assembly, which includes a stator core bearing multiple stator windings electromagnetically paired with the rotor winding. Each stator winding is electrically connected to a respective pair of TIM switches, whereas the rotor winding is electrically connected to the PTC switches.
    Type: Application
    Filed: October 2, 2023
    Publication date: April 3, 2025
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Khorshed Mohammed Alam, Yilun Luo, Junghoon Kim, Chandra S. Namuduri, Muhammad A. Zahid, Mazharul Chowdhury, Lei Hao, Seyedrasoul Hosseini
  • Patent number: 12259922
    Abstract: In one example method, a first image including M objects is obtained. For N objects in the M objects, when N is greater than or equal to 2, arrangement orders of the N objects is determined, where an arrangement order of any one of the N objects is determined based on at least one of a scene intent weight, a confidence score, or an object relationship score. The scene intent weight is used to indicate a probability that the any object is searched in a scene corresponding to the first image, the confidence score is a similarity between the any object and an image in an image library, and the object relationship score is used to indicate importance of the any object in the first image. Search results of some or all of the N objects are fed back according to the arrangement orders of the N objects.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: March 25, 2025
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Lei Hao, Yu Wang, Min Wang, Songcen Xu, Weicai Zhong, Zhenhua Zhao
  • Patent number: 12246606
    Abstract: A power control system for a vehicle includes a charge port and a contactor connected to the charge port and including a first plurality of switches. An energy storage system includes a second plurality of switches and one or more battery packs. A bi-directional DC-DC converter is connected between the energy storage system and a plurality of vehicle loads. A controller is configured to control states of the first and second plurality of switches to configure in a plurality of modes including a range improvement mode, a first charging mode to perform charging at a first voltage level, a second charging mode to perform charging at a second voltage level, a battery preconditioning mode; and an accessory load support mode.
    Type: Grant
    Filed: December 14, 2021
    Date of Patent: March 11, 2025
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Lei Hao, Chandra S. Namuduri, Chengwu Duan, Suresh Gopalakrishnan, Neeraj S. Shidore, Venkata Prasad Atluri
  • Publication number: 20250079843
    Abstract: A vehicle to load inverter module (V2LIM) based onboard charger (OBC). The V2LIM based OBC may include an alternating current to direct current (AC/DC) converter having an AC/DC input and an AC/DC output, a direct current to direct current (DC/DC) converter having a DC/DC input and a DC/DC output, and a direct current to alternating current (DC/AC) converter having a DC/AC input and a DC/AC output, and a controller configured for controlling the AC/DC converter, the DC/DC converter, and the DC/AC converter according to a split-phase load powering mode.
    Type: Application
    Filed: September 6, 2023
    Publication date: March 6, 2025
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Minh-Khai Nguyen, Lei Hao, Samantha Gunter Miller
  • Patent number: 12240345
    Abstract: A system for controlling power transfer includes a direct current (DC)-DC converter connected to a charging bus and selectively connected to a propulsion battery assembly and a supplemental battery assembly, the propulsion battery assembly having a first chemistry and configured to supply power to an electric motor of a vehicle, the supplemental battery assembly having a second chemistry that is different than the first chemistry. The system also includes a charger connected to the charging bus at a first side of the DC-DC converter, the charging bus connected to a load at a second side of the DC-DC converter, and a controller configured to control the DC-DC converter to perform a charging operation.
    Type: Grant
    Filed: August 9, 2023
    Date of Patent: March 4, 2025
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Shuonan Xu, Hanho Yun, Lei Hao
  • Publication number: 20250050758
    Abstract: A system for controlling power transfer includes a direct current (DC)-DC converter connected to a charging bus and selectively connected to a propulsion battery assembly and a supplemental battery assembly, the propulsion battery assembly having a first chemistry and configured to supply power to an electric motor of a vehicle, the supplemental battery assembly having a second chemistry that is different than the first chemistry. The system also includes a charger connected to the charging bus at a first side of the DC-DC converter, the charging bus connected to a load at a second side of the DC-DC converter, and a controller configured to control the DC-DC converter to perform a charging operation.
    Type: Application
    Filed: August 9, 2023
    Publication date: February 13, 2025
    Inventors: Shuonan Xu, Hanho Yun, Lei Hao
  • Patent number: 12224580
    Abstract: Techniques are provided for activating a plurality of power features of a vehicle. In one embodiment, the techniques involve controlling a plurality of switches of a multi-function converter unit configuration to activate at least one of the plurality of power features of the vehicle, wherein the multi-function converter unit configuration includes a multi-function converter unit, at least one charge port, and a load.
    Type: Grant
    Filed: July 26, 2023
    Date of Patent: February 11, 2025
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Lei Hao, Shuonan Xu
  • Publication number: 20250038526
    Abstract: Techniques are provided for activating a plurality of power features of a vehicle. In one embodiment, the techniques involve controlling a plurality of switches of a multi-function converter unit configuration to activate at least one of the plurality of power features of the vehicle, wherein the multi-function converter unit configuration includes a multi-function converter unit, at least one charge port, and a load.
    Type: Application
    Filed: July 26, 2023
    Publication date: January 30, 2025
    Inventors: Lei Hao, Shuonan Xu
  • Publication number: 20250026216
    Abstract: Embodiments include an electric vehicle having a charging port configured to receive an alternating current (AC) power, a direct current (DC) battery, and a bidirectional inverter configured to convert AC power to DC power and to convert DC power to AC power, the bidirectional inverter is selectively connected to the DC battery by propulsion switches. The electric vehicle also includes an AC motor connected to the bidirectional inverter and selectively connected to the charging port by a first charging switch, an isolated DC/DC converter motor selectively connected to the DC battery via a second charging switch and a third charging switch, and a processor configured to control the operation of the propulsion switches, the first charging switch, the second charging switch, and the third charging switch based on an operational mode of the electric vehicle.
    Type: Application
    Filed: July 19, 2023
    Publication date: January 23, 2025
    Inventors: Minh-Khai Nguyen, Lei Hao, Chandra S. Namuduri, Sanjeev M. Naik
  • Publication number: 20250030362
    Abstract: Some embodiments disclosed herein are directed to power transfer in electric motors having segmented windings. In some embodiments, a control system may determine a d-axis command voltage for a secondary winding of an electric motor and a q-axis command voltage for the secondary winding based on a primary winding voltage, primary winding current, secondary winding current, and rotor electrical position. The control system may generate gate control signals based on the determined d-axis command voltage and q-axis command voltage for the secondary winding, and transmit the gate control signals to an inverter coupled to the secondary winding to control an electrical power transfer between the primary winding and the secondary winding. Other embodiments may be disclosed or claimed.
    Type: Application
    Filed: July 20, 2023
    Publication date: January 23, 2025
    Inventors: Peng Peng, Lei Hao, Suresh Gopalakrishnan
  • Patent number: 12206285
    Abstract: An induction rotor assembly having conductive bars is provided. The assembly comprises a lamination stack comprising a body having a first end and second ends to define a longitudinal axis. The body has an outer circumferential portion extending from the first end to the second end. The outer portion has a plurality of walls defining open slots formed from the first end through the second end. The assembly further comprises a first ring disposed on the first end and a second ring disposed on the second end. The assembly further comprises a plurality of conductive bars extending between the first and second rings. Each conductive bar is disposed in one of the slots such that the respective conductive bar is in contact with the lamination stack and connects the first and second rings. Each bar comprises an inner portion and a conductive outer skin disposed about the inner portion.
    Type: Grant
    Filed: February 27, 2023
    Date of Patent: January 21, 2025
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Qigui Wang, John S. Agapiou, Liang Wang, Lei Hao, Daniel J. Wilson, Steven L Burkholder
  • Publication number: 20250023365
    Abstract: Simultaneous parallel charging of a first and second electrical energy storage devices coupled to a charge source is carried out by directly coupling the charge source to one of the first ESD and the second ESD and through a DC to DC converter to the other of the first ESD and the second ESD. The charge source provides a current that is allocated to the two ESDs by controlling the DC to DC converter. Priority of charging may be given to either ESD.
    Type: Application
    Filed: July 14, 2023
    Publication date: January 16, 2025
    Inventors: Shuonan Xu, Yue-Yun Wang, Lei Hao, Jun-mo Kang, Su-Yang Shieh, Mohamed Kamel
  • Publication number: 20240425028
    Abstract: Some embodiments disclosed herein are directed to constraint handling for parameters of electric motors. In particular, embodiments of the present disclosure relate to handling constraints for parameters such as current, voltage, and torque associated with an electric motor. Other embodiments may be disclosed or claimed.
    Type: Application
    Filed: June 26, 2023
    Publication date: December 26, 2024
    Inventors: Lei Hao, Yue-Yun Wang, Bojian Cao, Suresh Gopalakrishnan, Gionata Cimini
  • Publication number: 20240429481
    Abstract: A battery electric system includes an inverter connected to a battery pack and a direct current (DC) voltage bus, first and second electrical switches, and a battery controller. The first switch is connected between the inverter and battery pack, and opens during an alternating current (AC) self-heating mode of the battery pack. This mode includes generating an AC waveform through the battery pack via the inverter at a controlled amplitude. The second switch, which is connected to the inverter and the first switch, closes during the self-heating mode. The controller, in response to calibrated entry criteria, opens the first switch, closes the second switch, and controls ON/OFF conducting states of the power switches to self-heat the battery pack using the AC waveform. The entry criteria includes required charging of the battery pack while a temperature of the battery pack is less than a calibrated temperature limit.
    Type: Application
    Filed: June 22, 2023
    Publication date: December 26, 2024
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Shuonan Xu, Lei Hao, Neeraj S. Shidore, Chandra S. Namuduri, Nicholas W. Pinto
  • Publication number: 20240416768
    Abstract: An energy transfer system of a vehicle includes a multi-winding motor, a first inverter connected to a first set of windings, and a second inverter connected to a second set of windings. The system includes a controller configured to control the first inverter and the second inverter to control a charging current through the multi-winding motor at a desired power when the multi-winding motor is in a zero-torque condition. The controller is configured to control the charging current through the first inverter and second inverter so that a first current vector associated with the first set of windings and a second vector associated with the second set of windings are symmetric about a d-axis and the multi-winding motor functions as a transformer, the control of the first inverter and the second inverter providing for power transfer between the first set of windings and the second set of windings.
    Type: Application
    Filed: June 14, 2023
    Publication date: December 19, 2024
    Inventors: Peng Peng, Lei Hao, Suresh Gopalakrishnan
  • Publication number: 20240405307
    Abstract: A modulation strategy for maximization of battery heating efficiency is provided. A system includes an inverter coupled to a high voltage battery and a motor. A control system is coupled to the inverter. The control system is configured to control the inverter to output a first electrical current having a first triangular waveform to the motor, a second electrical current having a second triangular waveform to the motor, and a third electrical current to the motor. The first and second triangular waveforms are out of phase.
    Type: Application
    Filed: June 1, 2023
    Publication date: December 5, 2024
    Inventors: Renato Amorim Torres, Suresh Gopalakrishnan, Lei Hao, Chandra S. Namuduri, Thomas W. Nehl