Jian B Lin

US Patent:

7768233, Aug 3, 2010

Filed:

Oct 4, 2007

Appl. No.:

11/867497

Inventors:

Jian Lin - Beverly Hills MI, US
Xidong Tang - Sterling Heights MI, US
Brian J. Koch - Berkley MI, US
Damon R. Frisch - Troy MI, US
Michael J. Gielniak - Romeo MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

H02J 7/00

US Classification:

320132, 324426, 324431

Abstract:

A method for determining the state of charge (SOC) of a lithium ion battery is provided. The method leverages a circuit model of the lithium ion battery, and generates four battery parameters from which the SOC is derived.

US Patent:

8054046, Nov 8, 2011

Filed:

Jan 23, 2008

Appl. No.:

12/018653

Inventors:

Jian Lin - Beverly Hills MI, US
Brian J. Koch - Berkley MI, US
Damon R. Frisch - Troy MI, US
Michael J. Gielniak - Romeo MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

H02J 7/04

US Classification:

320156, 320104, 320136, 903903

Abstract:

A method for rapidly determining an initial diffusion voltage (V)as a starting point in calculating a diffusion voltage in an electro-chemical cell (e. g. , a battery used in an automotive vehicle) includes obtaining a time difference tbetween a time when the cell was last turned-OFF and a time when the cell was next turned-ON, selecting a starting diffusion voltage (V)based on t, determining a trial diffusion voltage Vbased on a diffusion circuit model and (V), calculating an error voltage V=(V)−|V−V| where Vand Vare cell voltages at turn-OFF and turn-ON respectively, repeating the foregoing determining and calculating steps using for each iteration (V)=(V)+Vuntil Vis less than or equal to a first predetermined tolerance amount ε, storing in a memory a value of Vcorresponding to the condition V≦ε, and setting (V)equal to the just stored value of V. A further diffusion voltage Vis then determined using the same diffusion circuit model and the just obtained (V)and is advantageously used by a controller in an electric propulsion vehicle to determine a state of charge of the propulsion battery.

US Patent:

8108160, Jan 31, 2012

Filed:

Sep 25, 2008

Appl. No.:

12/238204

Inventors:

Wei Liu - Warren MI, US
Michael J. Gielniak - Atlanta GA, US
Jian Lin - Beverly Hills MI, US
Brian Koch - Berkley MI, US
Damon R. Frisch - Troy MI, US
Joseph M. Lograsso - Troy MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

H02J 7/00

US Classification:

702 63, 702 57, 320132, 320150, 324426, 324427, 324428, 324429, 324430, 324431, 324432, 324433, 324434, 324435, 324436, 324437

Abstract:

Methods and systems for determining a state of charge of a battery are provided. A first component of the state of charge is calculated based on a first property of the battery. A second component of the state of charge is calculated based on a second property of the battery. The first component of the state of charge is weighted based on a rate of change of the first property relative to a change of the state of charge. The second component of the state of charge is weighted based on a rate of change of the second property relative to a change of the state of charge. The state of charge is determined based on the first and second weighted components.

US Patent:

8170818, May 1, 2012

Filed:

Mar 10, 2010

Appl. No.:

12/721368

Inventors:

Jian Lin - Beverly Hills MI, US
Xidong Tang - Sterling Heights MI, US
Brian J. Koch - Berkley MI, US
Mark W. Verbrugge - Troy MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

G01R 31/36

US Classification:

702 63

Abstract:

A method for estimating vehicle battery parameters that uses two different sampling rates. The method samples a battery terminal voltage and current at a high sampling rate to estimate the battery open circuit voltage and high frequency resistance. The battery state of charge (SOC) is derived from the open circuit voltage. Next, the battery terminal voltage and current are re-sampled at a low sampling rate. Other battery parameters can be extracted from the low-rate sampled signals. Next, all of the battery parameters that were obtained from the two sampling rates are used together to predict battery power.

US Patent:

8321164, Nov 27, 2012

Filed:

Sep 25, 2008

Appl. No.:

12/238224

Inventors:

Wei Liu - Warren MI, US
Michael J. Gielniak - Atlanta GA, US
Jian Lin - Beverly Hills MI, US
Brian J. Koch - Berkley MI, US
Damon R. Frisch - Troy MI, US
Joseph M. Lograsso - Troy MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

G01R 31/36

US Classification:

702 63, 320104, 320124, 320149, 702 57, 324426, 324427

Abstract:

Methods and systems for determining a state of charge of a battery exhibiting a transient response are provided. At least one property of the battery is measured. The state of charge of the battery is determined based on the at least one measured property and a transient response of the battery.

US Patent:

8552687, Oct 8, 2013

Filed:

Jun 5, 2008

Appl. No.:

12/134032

Inventors:

Jian Lin - Beverly Hills MI, US
Xidong Tang - Sterling Heights MI, US
Xiaodong Zhang - Mason OH, US
Brian J. Koch - Berkley MI, US
Damon R. Frisch - Troy MI, US
Wei Liu - Warren MI, US
Michael J. Gielniak - Atlanta GA, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

H02J 7/00

US Classification:

320132, 320166, 320167

Abstract:

Methods and systems are provided for characterizing a battery. A property of the battery is measured. A dynamic characteristic of the battery is determined from a second order linear dynamic model.

US Patent:

8560257, Oct 15, 2013

Filed:

Nov 29, 2010

Appl. No.:

12/955288

Inventors:

Xidong Tang - Royal Oak MI, US
Yandong Zhang - Plano TX, US
Andrew C Baughman - Northville MI, US
Brian J. Koch - Berkley MI, US
Jian Lin - Beverly Hills MI, US
Damon R. Frisch - Troy MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

G01R 31/36
G06F 19/00

US Classification:

702 63, 320137, 702 65

Abstract:

A method of determining a state of health of a battery in real time includes estimating a parameter value associated with the state of health of the battery and determining one or more of a terminal voltage, an accumulated charge, a state of charge, and a temperature of the battery. The method further includes determining, via a computing device, a reserve capacity of the battery based at least in part on the estimated parameter value and one or more of the terminal voltage, the accumulated charge, the state of charge, and the temperature of the battery.

US Patent:

8624559, Jan 7, 2014

Filed:

Oct 14, 2010

Appl. No.:

12/904893

Inventors:

Asif A. Syed - Canton MI, US
Andrew H. Leutheuser - Sunnyvale CA, US
Jian Lin - Beverly Hills CA, US
Joseph M. Lograsso - Troy MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

H02J 7/14

US Classification:

320162, 320149, 320164

Abstract:

A method for controlling charging and discharging of a battery pack for an electric or hybrid vehicle to prevent overheating damage. Current flowing into or out of the battery pack is monitored, and root mean square (RMS) current is integrated over a time window and compared to a threshold to determine if power needs to be regulated in order to prevent damage to the cells in the battery pack. If the time-integrated RMS current exceeds the threshold, a closed-loop proportional-integral (PI) controller is activated to regulate power input or output. The controller will continue to regulate power until the time-integrated RMS current drops below the threshold. Various thresholds can be defined for different time windows. The gains used in the PI controller can also be adjusted to scale the amount of power regulation.