Patents by Inventor Shifang Li

Shifang Li 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: 20220363162
    Abstract: A diagnostic system for a vehicle includes a vehicle system configured to operate the vehicle in a normal operating mode and a boosted mode. In the boosted mode, the vehicle system increases at least one of a maximum motor torque, a maximum engine torque, and a maximum battery power available to the vehicle. A wear estimation module is configured to collect wear data associated with a component of the vehicle while being operated in the boosted mode, estimate, based on the collected wear data, wear of the component caused by being operated in the boosted mode, and generate a prediction of a remaining lifetime of the component based on the estimated wear of the component.
    Type: Application
    Filed: May 12, 2021
    Publication date: November 17, 2022
    Inventors: Shiming DUAN, Yiran HU, Shifang LI, Brent S. GAGAS
  • Publication number: 20220307990
    Abstract: A die screening system may receive die-resolved metrology data for a population of dies on one or more samples from the one or more in-line metrology tools after one or more fabrication steps, where the die-resolved metrology data includes images generated using one or more measurement configurations of the one or more in-line metrology tools. In this way, the die-resolved metrology data provides many measurement channels per die, where a particular measurement channel includes data from a particular pixel of a particular image. The controller may then generate screening data for the population of dies from the die-resolved metrology data, where the screening data includes a subset of the plurality of measurement channels of the die-resolved metrology data, and screen the plurality of dies into two or more disposition classes including at least outlier dies based on variability in the screening data.
    Type: Application
    Filed: June 4, 2021
    Publication date: September 29, 2022
    Inventors: John Charles Robinson, Stilian Pandev, Shifang Li, Mike Von Den Hoff, Justin Lach, Barry Saville, David W. Price, Robert J. Rathert, Chet V. Lenox, Thomas Groos, Oreste Donzella
  • Patent number: 11451071
    Abstract: A battery electric vehicle includes a high voltage rechargeable energy storage system (RESS). The RESS includes several battery modules reconfigurable among parallel and series arrangements. During reconfiguration transitions, a low voltage battery services low voltage loads of the battery electric vehicle. The low voltage battery is preconditioned in advance of reconfigurations.
    Type: Grant
    Filed: June 2, 2020
    Date of Patent: September 20, 2022
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Fang Dai, Shifang Li, Jinming Liu, Yue Fan, Mei Cai
  • Patent number: 11358486
    Abstract: A multi-pack battery system having at least first and second battery packs each with positive and negative terminals, and each with upper and lower switches respectively connected to the positive and negative terminals. The battery packs have a first voltage level, and are connectable in either series or parallel. A controller controls an ON/OFF state of the switches in response to input signals to select between two series charging modes, three parallel charging modes, and one or more propulsion modes. Some embodiments have a series propulsion mode. An electric powertrain system includes first and second power inverter modules (“PIMs”), an electrical load, front and rear electric machines connected to a respective one of the first and second PIMs, and the battery system. The powertrain system may selectively provide all-wheel, front-wheel, or rear-wheel drive capabilities in each of the various propulsion modes.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: June 14, 2022
    Assignee: GM Global Technology Operations LLC
    Inventors: Shifang Li, William T. Ivan, Brendan M. Conlon, Yue Fan
  • Patent number: 11362524
    Abstract: A battery system and a method include an auxiliary power module configured to support auxiliary loads. A first contactor switch connected between first and second battery packs, and a second contactor switch is in series with the first contactor switch. A controller determines whether to open or close first and second contactor switches depending on whether the battery packs are being charged in a high voltage mode or a low voltage mode. The contactor switches are both closed when in the high voltage mode and at least one of the contactor switches is opened when in the low voltage mode. At least one of the first and second battery packs operate to power the auxiliary power module while charging at least one of the first and second battery packs regardless of whether the battery packs are in the high voltage mode or the low voltage mode.
    Type: Grant
    Filed: February 17, 2020
    Date of Patent: June 14, 2022
    Assignee: GM Global Technology Operations LLC
    Inventors: Andres V. Mituta, Shifang Li, Emil Francu, Garrett M. Seeman
  • Patent number: 11221300
    Abstract: Methods and systems for determining metrology-like information for a specimen using an inspection tool are provided. One method includes determining first process information for first feature(s) formed in first area(s) on a specimen from output generated by output acquisition subsystem(s) that include an inspection subsystem. The method also includes determining second process information for second feature(s) formed in second area(s) on the specimen from the output and at least a portion of the first process information. At least a portion of the second process information is a different type of information than the first process information. At least a portion of a design for the second feature(s) is different than a design for the first feature(s), and the first area(s) and the second area(s) are mutually exclusive on the specimen.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: January 11, 2022
    Assignee: KLA Corp.
    Inventor: Shifang Li
  • Publication number: 20210376619
    Abstract: A battery electric vehicle includes a high voltage rechargeable energy storage system (RESS). The RESS includes several battery modules reconfigurable among parallel and series arrangements. During reconfiguration transitions, a low voltage battery services low voltage loads of the battery electric vehicle. The low voltage battery is preconditioned in advance of reconfigurations.
    Type: Application
    Filed: June 2, 2020
    Publication date: December 2, 2021
    Inventors: Fang Dai, Shifang Li, Jinming Liu, Yue Fan, Mei Cai
  • Publication number: 20210293724
    Abstract: Methods and systems for determining metrology-like information for a specimen using an inspection tool are provided. One method includes determining first process information for first feature(s) formed in first area(s) on a specimen from output generated by output acquisition subsystem(s) that include an inspection subsystem. The method also includes determining second process information for second feature(s) formed in second area(s) on the specimen from the output and at least a portion of the first process information. At least a portion of the second process information is a different type of information than the first process information. At least a portion of a design for the second feature(s) is different than a design for the first feature(s), and the first area(s) and the second area(s) are mutually exclusive on the specimen.
    Type: Application
    Filed: March 5, 2021
    Publication date: September 23, 2021
    Inventor: Shifang Li
  • Publication number: 20210295495
    Abstract: A review system and operation method directs a beam of light toward a sample on a stage. The sample is a wafer level packaging wafer or a backend wafer. Defect review is performed based on the light reflected from the sample. The review system can use one or more of: a fluid supplied by an immersion subsystem that includes a fluid supply unit and a fluid removal unit; an illumination pattern for differential phase contrast; or ultraviolet or deep ultraviolet wavelengths.
    Type: Application
    Filed: March 21, 2020
    Publication date: September 23, 2021
    Inventor: Shifang Li
  • Publication number: 20210257843
    Abstract: A battery system and a method include an auxiliary power module configured to support auxiliary loads. A first contactor switch connected between first and second battery packs, and a second contactor switch is in series with the first contactor switch. A controller determines whether to open or close first and second contactor switches depending on whether the battery packs are being charged in a high voltage mode or a low voltage mode. The contactor switches are both closed when in the high voltage mode and at least one of the contactor switches is opened when in the low voltage mode. At least one of the first and second battery packs operate to power the auxiliary power module while charging at least one of the first and second battery packs regardless of whether the battery packs are in the high voltage mode or the low voltage mode.
    Type: Application
    Filed: February 17, 2020
    Publication date: August 19, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Andres V. Mituta, Shifang Li, Emil Francu, Garrett M. Seeman
  • Patent number: 10992147
    Abstract: An electric propulsion system for a mobile platform includes a battery system connected to positive and negative bus rails, an accessory load having a rotary electric machine, a traction power inverter module (“TPIM”), and an accessory load, switches configured to transition the battery modules to a series-connected (“S-connected”) configuration during a direct current fast-charging (“DCFC”) operation of the battery system, and a controller. When battery modules of the battery system are connected in series during a direct current fast-charging (“DCFC”) operation, the controller executes a diagnostic method to determine bus rail voltages on the positive and negative bus rails and a mid-bus voltage, identifies a diagnosed electrical condition of the electric propulsion system by comparing the voltages to expected values or ranges, and executes a control action in response to the diagnosed electrical condition.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: April 27, 2021
    Assignee: GM Global Technology Operations LLC
    Inventors: Shifang Li, William T. Ivan, Brendan M. Conlon, Yue Fan
  • Patent number: 10981557
    Abstract: Presented are traction battery pack balancing systems, methods for making/operating such systems, and multi-pack, electric-drive motor vehicles with battery pack balancing capabilities.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: April 20, 2021
    Assignee: GM Global Technology Operations LLC
    Inventors: Shaochun Ye, Daniel P. Grenn, Shifang Li, Russell K. Steele, Garrett M. Seeman
  • Publication number: 20210091575
    Abstract: An electric propulsion system for a mobile platform includes a battery system connected to positive and negative bus rails, an accessory load having a rotary electric machine, a traction power inverter module (“TPIM”), and an accessory load, switches configured to transition the battery modules to a series-connected (“S-connected”) configuration during a direct current fast-charging (“DCFC”) operation of the battery system, and a controller. When battery modules of the battery system are connected in series during a direct current fast-charging (“DCFC”) operation, the controller executes a diagnostic method to determine bus rail voltages on the positive and negative bus rails and a mid-bus voltage, identifies a diagnosed electrical condition of the electric propulsion system by comparing the voltages to expected values or ranges, and executes a control action in response to the diagnosed electrical condition.
    Type: Application
    Filed: September 25, 2019
    Publication date: March 25, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Shifang Li, William T. Ivan, Brendan M. Conlon, Yue Fan
  • Publication number: 20210078429
    Abstract: A multi-pack battery system having at least first and second battery packs each with positive and negative terminals, and each with upper and lower switches respectively connected to the positive and negative terminals. The battery packs have a first voltage level, and are connectable in either series or parallel. A controller controls an ON/OFF state of the switches in response to input signals to select between two series charging modes, three parallel charging modes, and one or more propulsion modes. Some embodiments have a series propulsion mode. An electric powertrain system includes first and second power inverter modules (“PIMs”), an electrical load, front and rear electric machines connected to a respective one of the first and second PIMs, and the battery system. The powertrain system may selectively provide all-wheel, front-wheel, or rear-wheel drive capabilities in each of the various propulsion modes.
    Type: Application
    Filed: September 16, 2019
    Publication date: March 18, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Shifang Li, William T. Ivan, Brendan M. Conlon, Yue Fan
  • Publication number: 20210041505
    Abstract: An active isolation detection method may be used with an electrical system having a battery pack connected to a high-voltage bus. The bus has positive and negative bus rails, each having a respective rail-to-ground voltage. The method may include connecting variable resistance element to the high-voltage bus, and determining input information indicative electrical characteristics of the battery pack, the high-voltage bus, and/or a charging station. The method includes varying a bias resistance of the high-voltage bus, via control of the variable resistance element, e.g., via duty cycle control of a binary switch in series with a bias resistor, to produce a varied bias resistance based on the input information. A target voltage shift is achieved on the high-voltage bus as a target level of change in one of the rail-to-ground voltages. An isolation resistance of the electrical system is determined via the controller using the varied bias resistance.
    Type: Application
    Filed: August 6, 2019
    Publication date: February 11, 2021
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Yue Fan, Shifang Li, Russell K. Steele, James E. Tarchinski
  • Publication number: 20200223422
    Abstract: Presented are traction battery pack balancing systems, methods for making/operating such systems, and multi-pack, electric-drive motor vehicles with battery pack balancing capabilities.
    Type: Application
    Filed: January 11, 2019
    Publication date: July 16, 2020
    Applicant: GM Global Technology Operations LLC
    Inventors: Shaochun Ye, Daniel P. Grenn, Shifang Li, Russell K. Steele, Garrett M. Seeman
  • Patent number: 10675991
    Abstract: Methods of charging a vehicle battery pack are disclosed. Example methods may include determining a voltage imbalance between at least two parallel strings of a battery pack exceeds a threshold magnitude. Methods may further include electrically reducing the voltage imbalance between the at least two parallel strings using a series circuit including a first group of one or more of the battery cells of a first one of the parallel strings, and reconnecting the parallel strings in an electrical circuit in parallel to each other, in which configuration the strings of the battery pack may supply power to the vehicle.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: June 9, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Yiran Hu, Shifang Li, Lei Hao, Chandra S. Namuduri, Thomas W. Nehl
  • Patent number: 10604038
    Abstract: A seat for at least one occupant of a vehicle includes a seat cushion, a back, and a first side component. The seat cushion has a front end, a back end, and a longitudinal axis extending through the front and back ends. The seat cushion includes a rear portion and a front portion. The rear portion is disposed at the back end and includes a first top surface that is configured to engage the occupant. The front portion is disposed at the front end. At least one of the front and rear portions is configured to move along the longitudinal axis with respect to the other of the front and rear portions. The back is disposed at the back end of the seat cushion. The first side component is coupled to the back. The first side component is configured to move between a stowed configuration and a use configuration.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: March 31, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Shifang Li, Yiran Hu, Carl W. Wellborn, Joseph Neighbors
  • Patent number: 10596917
    Abstract: An electrical system includes cables, a DC charge connector, first and second battery modules, a splice device, and a controller. Each battery module has first, second, third, and fourth electrical connectors receiving a respective one of the cables. The battery modules are connected to each other via the cables, and further have first, second, third, and fourth switches that connect battery cell strings to one or more connectors. The charge connector is connected to one of the cables between the first electrical connectors. The splice device connects the charge connector to the first connector of the first battery module and to a pair of the cables. A charging current may be split between the battery modules. The controller selectively establishes parallel charging, parallel drive, and separate drive and charging modes for each battery module. The system may have an independent drive mode.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: March 24, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Brendan M. Conlon, Shifang Li, Kris Sevel, Russell K. Steele
  • Publication number: 20200055404
    Abstract: An electrical system includes cables, a DC charge connector, first and second battery modules, a splice device, and a controller. Each battery module has first, second, third, and fourth electrical connectors receiving a respective one of the cables. The battery modules are connected to each other via the cables, and further have first, second, third, and fourth switches that connect battery cell strings to one or more connectors. The charge connector is connected to one of the cables between the first electrical connectors. The splice device connects the charge connector to the first connector of the first battery module and to a pair of the cables. A charging current may be split between the battery modules. The controller selectively establishes parallel charging, parallel drive, and separate drive and charging modes for each battery module. The system may have an independent drive mode.
    Type: Application
    Filed: August 14, 2018
    Publication date: February 20, 2020
    Applicant: GM Global Technology Operations LLC
    Inventors: Brendan M. Conlon, Shifang Li, Kris Sevel, Russell K. Steele