Ford Global Technolgoies, LLC

Ford Global Technology, LLC

Xu Wang

Chuan He

Xiaoguang Chang

Rui Wang

Yuan Zhang

Xiao Guang Yang

Yonghua Li

John Paul Gibeau

Richard Dyche Anderson

Jeffery R Grimes

Josephine S Lee

Baojin Wang

Szushen Peter Ho

Benjamin A Tabatowski-Bush

Xiaohong Nina Duan

Charles Everett Badger, Ii

Kevin Vander Laan

Lila Ghannam

Heinrich Enslin

Haiyan Chen

Hesam Zomorodi Moghadam

Xianzhi Gong

Zhimin Yang

Chingchi Chen

Bhaskara Rao Boddakayala

Michael Edward Loftus

Anthony Mark Phillips

Aaron Walker

Pratima V Addepalli

Feng Li

Satish B Chikkannanavar

Michael George Schamber

Wai Hwa Fong

Rutooj D Deshpande

Patterson Kaduvinal Abraham

Changjian Hu

Bogdan Bude

Connor McCann

Graham Lynn Briggs

Kenneth Jon Cunningham

Jeffrey J Cowell

Ruiqi Mao

Brandon Swisher

Rui Hu

Navid Rahbariasr

Andrea Cordoba Arenas

A power distribution system includes a contactor between a traction battery and a high-voltage bus. The system includes a controller configured to generate a contactor status to determine if the contactor is operating as commanded. The controller identifies a contactor as closed responsive to a rate of change of a voltage difference between a traction battery voltage and a high-voltage bus voltage over each of a predetermined number of time intervals being within a predetermined range.

System and method for contactor status check for electrified vehicle

A vehicle battery system includes a battery, storage, and one or more controllers. The storage maintains data defining power outputs for the battery at a plurality of predefined combinations of temperature and state of charge. The one or more controllers repeatedly update the data for some of the plurality based on temperatures and states of charge repeatedly encountered by the vehicle, update the data for other of the plurality based on data from a remote server, and discharge the battery according to the data for the some and other of the plurality.

System and method for operating vehicle based on battery health

A power system includes a battery and a controller. The controller inhibits charge of the battery according to voltage or current values sensed before and after contactors electrically connected to the battery are commanded to open and indicating that a leakage resistance associated with one of the contactors increases after the one of contactors is commanded to open, and a duration of a continuous voltage drop across another of the contactors after the another of the contactors is commanded to open exceeds a threshold.

Method and system for detecting contactor weld

Methods and system are described for recalibrating a charge storage capacity value of an electric energy storage device. In one example, the charge electric energy storage device may be a battery. The charge storage capacity value may be recalibrated via discharging and charging a battery via electric vehicle supply equipment.

System and method for recalibrating a traction battery through bi-directional power transfer

A method of detecting a thermal event associated with a battery assembly of an electrified vehicle includes, among other things, obtaining a temperature reading from a sensor associated with an area of the battery assembly, assessing whether the sensor is flagged with a first identifier or a second identifier. The first identifier indicates that the temperature reading is reliable. The second identifier indicates that the temperature reading is unreliable. If the sensor is flagged with the first identifier, the method detects a thermal event associated with the battery assembly based on the temperature reading from the sensor.

Traction battery pack thermal event detection

A vehicle includes a traction battery and a controller. The controller, responsive to some cells of the traction battery achieving a first state of charge threshold, discharge other cells of the traction battery, each having a capacity greater than each of the some of the cells, to a second state of charge threshold that is greater than the first state of charge threshold without discharging the some of the cells. The controller then charges all of the cells at the same time such that the some of the cells and the other of the cells achieve a same predetermined target state of charge at a same time.

Cell capacity based battery pack balancing

This disclosure relates to an electrified vehicle and a method for gradually adjusting a displayed state of charge. An exemplary electrified vehicle includes a battery, a display configured to display a state of charge of the battery, and a controller configured to adjust the displayed state of charge such that the displayed state of charge gradually converges to an estimated state of charge of the battery.

Electrified vehicle and method for gradually adjusting displayed state of charge

A vehicle includes an electric machine, a battery, an electrical circuit, an overcharge limit device, and a controller. The electric machine is configured to propel the vehicle. The battery has a plurality of cells and is configured to provide electrical power to the electric machine. The electrical circuit is configured to deliver the electrical power from the battery to the electric machine. The overcharge limit device is configured to individually disconnect each of the plurality cells from the circuit in response to an internal pressure of a respective cell exceeding a pressure threshold. The controller is programmed to, in response to detecting a first set of parameters that are indicative of a first of the cells being disconnected from the electrical circuit via the overcharge limit device, discontinue control the first of the cells.

Battery control system for a hybrid or electric vehicle

A vehicle includes a battery that is rechargeable using an external power source coupled to the vehicle. The vehicle includes a controller that is programmed to estimate parameters of the battery using a parameter estimation algorithm. The controller is programmed to change a charging current when connected to the external power source to provide an input to the parameter estimation algorithm that is sufficiently dynamic such that the parameter estimation algorithm converges to an accurate solution.

Plug-in charge current management for battery model-based online learning

A vehicle includes a battery and a controller. The controller is programmed to executed a parameter estimation strategy for the battery during time intervals when the current flowing through the battery is sufficiently dynamic. During periods of generally constant current, the parameters are derived from the last valid parameters from the parameter estimation strategy. During periods of generally constant current in which a battery temperature and/or a state of charge of the battery changes by a predetermined amount, the parameters are derived from historical parameter values.

EKF state relay strategy in battery online identification

Methods and system are described for estimating an amount of battery usage for a traction battery of a vehicle. The traction battery usage estimate may be based on or a function of a distance per gallon of gasoline-equivalent so that the usage estimate may be more familiar to vehicle operators. In addition, the traction battery usage estimate may also be based on traction battery current and traction battery voltage.

System and method for quantifying battery usage

A vehicle includes a traction battery having a plurality of battery cells and a balance circuit configured to selectively discharge one or more of the battery cells. A controller is programmed to estimate charge capacities of the battery cells and determine a standard deviation of the estimated capacities. The controller is further programmed to determine a skewness of the estimated capacities. The controller is also programmed to, in response to the skewness exceeding a first threshold, command the balance circuit to discharge one or more of the battery cells when a state of charge (SOC) of the traction battery is less than a second threshold, and, in response to the skewness being less than the first threshold, command the balance circuit to discharge one or more of the battery cells when the SOC of the traction battery is greater than the second threshold.

Balancing cells of a traction battery using statistical analysis

A vehicle system is provided with a battery and a controller. The battery includes a first module having a first capacity and a second module. The controller programmed to responsive to indication that the second module has been replaced by a new module with a second capacity that is greater than the first capacity for a corresponding state of charge (SOC), adjust a second SOC of the new module such that a maximum SOC value of the new module aligns with a maximum SOC value of the first module. The controller is further programmed to balance the first module and the new module separately.

Mixed battery pack control

A vehicle having a traction battery with at least one cell includes a controller coupled to the traction battery and programmed to modify traction battery current in response to a difference between a lithium plating parameter target value and a lithium plating parameter actual value to reduce the difference. The lithium plating parameter or indicator may be based on a differential open circuit voltage of a battery cell, or a ratio of differential voltage of the at least one cell as a function of time to cell charging rate of the at least one cell.

Closed loop feedback control to mitigate lithium plating in electrified vehicle battery

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Northville, MI, United States of America

Xu Wang