Patents by Inventor Xiaohong Nina Duan
Xiaohong Nina Duan 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: 10759303Abstract: An autonomous vehicle includes an electric powertrain having an electric machine and a traction battery. A vehicle controller is programmed to command power to the electric machine to propel the vehicle along a segment of a route according to a predetermined speed profile that is derived from a predicted heat generation of the battery for the segment such that actual temperatures of the battery remain below a temperature threshold for the segment.Type: GrantFiled: August 23, 2018Date of Patent: September 1, 2020Assignee: Ford Global Technologies, LLCInventors: Xiaohong Nina Duan, Yanan Zhao, Mark Steven Yamazaki
-
Publication number: 20200269704Abstract: A vehicle includes a traction battery comprising a plurality of cells. The vehicle also includes a plurality of power converters each electrically coupled between a corresponding group of cells and an electrical bus. A controller is programmed to allocate current demand to the power converters and operate the power converters to minimize energy consumption and losses.Type: ApplicationFiled: February 22, 2019Publication date: August 27, 2020Inventors: Xiaohong Nina DUAN, Richard Dyche ANDERSON
-
Patent number: 10703218Abstract: A vehicle includes a traction battery comprising a plurality of cells. The vehicle also includes a plurality of power converters each electrically coupled between a corresponding group of cells and an electrical bus. A controller is programmed to satisfy a current demand of the electrical bus by operating a subset of the power converters to each draw a current that exceeds a threshold corresponding to a power converter efficiency exceeding a predetermined efficiency. Power converters not assigned to the subset are operated at zero current.Type: GrantFiled: August 3, 2018Date of Patent: July 7, 2020Assignee: Ford Global Technologies, LLCInventor: Xiaohong Nina Duan
-
Patent number: 10625627Abstract: A method for a vehicle comprises, by a controller, responsive to charge current for a battery exceeding a threshold, inhibiting further charging of the battery. The method further includes, responsive to the vehicle achieving a predefined state following the charge current exceeding the threshold, discharging the battery for a predetermined time at a predetermined current both defined by an amount and duration that the charge current exceeded the threshold to deplate lithium from an anode of the battery.Type: GrantFiled: May 22, 2018Date of Patent: April 21, 2020Assignee: Ford Global Technologies, LLCInventors: Xiaohong Nina Duan, Chi Paik, Jianrong Huang
-
Publication number: 20200062126Abstract: An autonomous vehicle includes an electric powertrain having an electric machine and a traction battery. A vehicle controller is programmed to command power to the electric machine to propel the vehicle along a segment of a route according to a predetermined speed profile that is derived from a predicted heat generation of the battery for the segment such that actual temperatures of the battery remain below a temperature threshold for the segment.Type: ApplicationFiled: August 23, 2018Publication date: February 27, 2020Inventors: Xiaohong Nina DUAN, Yanan ZHAO, Mark Steven YAMAZAKI
-
Publication number: 20200039358Abstract: A vehicle includes a traction battery comprising a plurality of cells. The vehicle also includes a plurality of power converters each electrically coupled between a corresponding group of cells and an electrical bus. A controller is programmed to satisfy a current demand of the electrical bus by operating a subset of the power converters to each draw a current that exceeds a threshold corresponding to a power converter efficiency exceeding a predetermined efficiency. Power converters not assigned to the subset are operated at zero current.Type: ApplicationFiled: August 3, 2018Publication date: February 6, 2020Inventor: Xiaohong Nina DUAN
-
Publication number: 20190389452Abstract: A vehicle includes an electric machine, a battery, a cooler, and a controller. The electric machine is configured to propel the vehicle. The battery is configured to power the electric machine. The cooler is configured to cool the battery. The controller is programmed to, responsive to the vehicle traveling from first to second locations on a predetermined route, operate the electric machine such that battery charge is depleted from an initial charge at the first location to a minimum battery charge limit upon arrival at the second location. The controller is also programmed to, responsive to the vehicle traveling from first to second locations on a predetermined route, operate the cooler such that battery temperature increases from an initial temperature at the first location to a battery shutdown temperature limit at the second location.Type: ApplicationFiled: June 26, 2018Publication date: December 26, 2019Inventors: Xiaohong Nina DUAN, Yanan ZHAO
-
Publication number: 20190359066Abstract: A method for a vehicle comprises, by a controller, responsive to charge current for a battery exceeding a threshold, inhibiting further charging of the battery. The method further includes, responsive to the vehicle achieving a predefined state following the charge current exceeding the threshold, discharging the battery for a predetermined time at a predetermined current both defined by an amount and duration that the charge current exceeded the threshold to deplate lithium from an anode of the battery.Type: ApplicationFiled: May 22, 2018Publication date: November 28, 2019Inventors: XIAOHONG NINA DUAN, CHI PAIK, JIANRONG HUANG
-
Patent number: 10388993Abstract: A vehicle includes a traction battery subject to alternating cycling and storage modes and a controller. The controller is programmed to calculate an accumulated degradation for the traction battery based on a degradation profile for the traction battery. The degradation profile defines degradation accumulated over time and may differ based on the mode and temperature. The initial degradation value includes the accumulated degradation for the present mode and at least a portion of the accumulated degradation for the other mode. Degradation is then accumulated according to the degradation profile starting from the initial degradation value. The amount of accumulated degradation from the other mode that is included may vary based on the mode and the accumulated degradation.Type: GrantFiled: December 13, 2016Date of Patent: August 20, 2019Assignee: Ford Global Technologies, LLCInventor: Xiaohong Nina Duan
-
Patent number: 10114079Abstract: A vehicle includes a traction battery. A controller is configured to operate the traction battery according to a capacity estimate. The capacity estimate is based on a difference between a current-based estimation and a voltage-based estimation of a change in battery state of charge over a time interval. The difference is evaluated over a predetermined number of time intervals. When more than a predetermined percentage of the differences exceed a threshold, the capacity estimate is updated based on an average of the differences.Type: GrantFiled: February 24, 2016Date of Patent: October 30, 2018Assignee: Ford Global Technologies, LLCInventors: Xiaohong Nina Duan, Xu Wang
-
Patent number: 9956887Abstract: Methods and systems are described to provide the user with information relating to status of vehicle and battery status based on environment and vehicle use. The user can be educated on the effects of vehicle use and environmental factors on the vehicle battery's status and ability to store charge. This is intended to alter the user's behavior to improve battery performance. A display can provide data representing at least one display image presenting information related to battery status, including capacity decay. A display generator can generate visual data for display in the at least one display image to provide visual stimulation, representing the battery state, which is based on the state of charge (SOC), temperature, and vehicle off time, and user selected options to reduce possible battery capacity decay, to the user.Type: GrantFiled: June 16, 2014Date of Patent: May 1, 2018Assignee: Ford Global Technologies, LLCInventors: Xiaohong Nina Duan, Dawn Bernardi
-
Publication number: 20170242079Abstract: A vehicle includes a traction battery. A controller is configured to operate the traction battery according to a capacity estimate. The capacity estimate is based on a difference between a current-based estimation and a voltage-based estimation of a change in battery state of charge over a time interval. The difference is evaluated over a predetermined number of time intervals. When more than a predetermined percentage of the differences exceed a threshold, the capacity estimate is updated based on an average of the differences.Type: ApplicationFiled: February 24, 2016Publication date: August 24, 2017Inventors: Xiaohong Nina DUAN, Xu WANG
-
Publication number: 20170106766Abstract: A vehicle includes a traction battery and a controller. The controller is programmed to output an age value of the traction battery based on a ratio of a reference capacity value to an initial reference capacity. The reference capacity value is derived from a mean and a standard deviation of a plurality of historical battery capacity values and has a predetermined probability of being less than an actual battery capacity. The controller is programmed to adjust a battery control strategy based on the age value. The vehicle includes an instrument cluster that is configured to display the age value.Type: ApplicationFiled: October 20, 2015Publication date: April 20, 2017Inventors: Xiaohong Nina DUAN, Xu WANG
-
Publication number: 20170092992Abstract: A vehicle includes a traction battery subject to alternating cycling and storage modes and a controller. The controller is programmed to calculate an accumulated degradation for the traction battery based on a degradation profile for the traction battery. The degradation profile defines degradation accumulated over time and may differ based on the mode and temperature. The initial degradation value includes the accumulated degradation for the present mode and at least a portion of the accumulated degradation for the other mode. Degradation is then accumulated according to the degradation profile starting from the initial degradation value. The amount of accumulated degradation from the other mode that is included may vary based on the mode and the accumulated degradation.Type: ApplicationFiled: December 13, 2016Publication date: March 30, 2017Inventor: Xiaohong Nina DUAN
-
Patent number: 9559390Abstract: A vehicle includes a traction battery subject to alternating cycling and storage modes and a controller. The controller is programmed to calculate an accumulated degradation for the traction battery based on a degradation profile for the traction battery. The degradation profile defines degradation accumulated over time and may differ based on the mode and temperature. The initial degradation value includes the accumulated degradation for the present mode and at least a portion of the accumulated degradation for the other mode. Degradation is then accumulated according to the degradation profile starting from the initial degradation value. The amount of accumulated degradation from the other mode that is included may vary based on the mode and the accumulated degradation.Type: GrantFiled: December 19, 2013Date of Patent: January 31, 2017Assignee: Ford Global Technologies, LLCInventor: Xiaohong Nina Duan
-
Publication number: 20150360578Abstract: Methods and systems are described to provide the user with information relating to status of vehicle and battery status based on environment and vehicle use. The user can be educated on the effects of vehicle use and environmental factors on the vehicle battery's status and ability to store charge. This is intended to alter the user's behavior to improve battery performance. A display can provide data representing at least one display image presenting information related to battery status, including capacity decay. A display generator can generate visual data for display in the at least one display image to provide visual stimulation, representing the battery state, which is based on the state of charge (SOC), temperature, and vehicle off time, and user selected options to reduce possible battery capacity decay, to the user.Type: ApplicationFiled: June 16, 2014Publication date: December 17, 2015Inventors: Xiaohong Nina DUAN, Dawn Bernardi
-
Publication number: 20150291054Abstract: A vehicle traction battery system may include a battery pack, a fan configured to direct air flow to the pack, and a controller. The controller may be programmed to, in response to a predicted pack temperature being greater than a first predefined temperature, direct the fan to operate at a predefined generally constant speed that does not change with vehicle speed or engine on/off state until the predicted battery pack temperature falls below a second predefined temperature. A method is also provided for cooling the vehicle traction battery system based on a predicted battery pack temperature and a heat generation rate.Type: ApplicationFiled: April 15, 2014Publication date: October 15, 2015Applicant: Ford Global Technologies, LLCInventors: Xiaohong Nina Duan, Chuan He
-
Publication number: 20150180090Abstract: A vehicle includes a traction battery subject to alternating cycling and storage modes and a controller. The controller is programmed to calculate an accumulated degradation for the traction battery based on a degradation profile for the traction battery. The degradation profile defines degradation accumulated over time and may differ based on the mode and temperature. The initial degradation value includes the accumulated degradation for the present mode and at least a portion of the accumulated degradation for the other mode. Degradation is then accumulated according to the degradation profile starting from the initial degradation value. The amount of accumulated degradation from the other mode that is included may vary based on the mode and the accumulated degradation.Type: ApplicationFiled: December 19, 2013Publication date: June 25, 2015Applicant: Ford Global Technologies, LLCInventor: Xiaohong Nina Duan
-
Patent number: 6544137Abstract: A differential device for coupling an input shaft, a first output shaft, and a second output shaft is provided. The differential device preferably includes a differential case with a first side gear, a second side gear, a pinion gear, and a hydraulic conduit. The differential device preferably includes a first rotary pump, which preferably functions to pump hydraulic fluid through the hydraulic conduit upon the relative rotational movement of the differential case and the first output shaft and to resist relative rotational movement of the differential case and the first output shaft upon a restriction of the transmittal of hydraulic fluid through the hydraulic conduit. The differential device also preferably includes a valve system, which functions to selectively restrict the transmittal of hydraulic fluid through the hydraulic conduit.Type: GrantFiled: July 18, 2001Date of Patent: April 8, 2003Assignee: Visteon Global Technologies, Inc.Inventor: Xiaohong Nina Duan
-
Patent number: 6544136Abstract: A differential device for transferring torque and rotation from an input shaft to a first output shaft and a second output shaft of a vehicle is provided. The differential device includes a carrier coupled to an input shaft, a first pump/motor coupled to the carrier and to the first output shaft, and a second pump/motor coupled to the carrier and to the second output shaft. The first pump/motor preferably functions to pump a hydraulic fluid upon a rotation of the first output shaft at a different speed than the carrier, and to rotate the first output shaft at a different speed than the carrier upon a sufficient pressurization of the hydraulic fluid. Similarly, the second pump/motor preferably functions to pump a hydraulic fluid upon a rotation of the second output shaft at a different speed than the carrier, and to rotate the second output shaft at a different speed than the carrier upon a sufficient pressurization of the hydraulic fluid.Type: GrantFiled: July 18, 2001Date of Patent: April 8, 2003Assignee: Visteon Global Technologies, Inc.Inventor: Xiaohong Nina Duan