Smart electric vehicle (EV) charging and grid integration apparatus and methods
Abstract
An expert system manages a power grid wherein charging stations are connected to the power grid, with electric vehicles connected to the charging stations, whereby the expert system selectively backfills power from connected electric vehicles to the power grid through a grid tie inverter (if present) within the charging stations. In more traditional usage, the expert system allows for electric vehicle charging, coupled with user preferences as to charge time, charge cost, and charging station capabilities, without exceeding the power grid capacity at any point. A robust yet accurate state of charge (SOC) calculation method is also presented, whereby initially an open circuit voltage (OCV) based on sampled battery voltages and currents is calculated, and then the SOC is obtained based on a mapping between a previously measured reference OCV (ROCV) and SOC. The OCV-SOC calculation method accommodates likely any battery type with any current profile.
- Inventors:
- Issue Date:
- Research Org.:
- Univ. of California, Oakland, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1179006
- Patent Number(s):
- 9026347
- Application Number:
- 13/693,747
- Assignee:
- The Regents of the University of California (Oakland, CA)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B60 - VEHICLES IN GENERAL B60L - PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
- DOE Contract Number:
- OE0000192
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2012 Dec 04
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 25 ENERGY STORAGE; 33 ADVANCED PROPULSION SYSTEMS
Citation Formats
Gadh, Rajit, Mal, Siddhartha, Prabhu, Shivanand, Chu, Chi-Cheng, Sheikh, Omar, Chung, Ching-Yen, He, Lei, Xiao, Bingjun, and Shi, Yiyu. Smart electric vehicle (EV) charging and grid integration apparatus and methods. United States: N. p., 2015.
Web.
Gadh, Rajit, Mal, Siddhartha, Prabhu, Shivanand, Chu, Chi-Cheng, Sheikh, Omar, Chung, Ching-Yen, He, Lei, Xiao, Bingjun, & Shi, Yiyu. Smart electric vehicle (EV) charging and grid integration apparatus and methods. United States.
Gadh, Rajit, Mal, Siddhartha, Prabhu, Shivanand, Chu, Chi-Cheng, Sheikh, Omar, Chung, Ching-Yen, He, Lei, Xiao, Bingjun, and Shi, Yiyu. Tue .
"Smart electric vehicle (EV) charging and grid integration apparatus and methods". United States. https://www.osti.gov/servlets/purl/1179006.
@article{osti_1179006,
title = {Smart electric vehicle (EV) charging and grid integration apparatus and methods},
author = {Gadh, Rajit and Mal, Siddhartha and Prabhu, Shivanand and Chu, Chi-Cheng and Sheikh, Omar and Chung, Ching-Yen and He, Lei and Xiao, Bingjun and Shi, Yiyu},
abstractNote = {An expert system manages a power grid wherein charging stations are connected to the power grid, with electric vehicles connected to the charging stations, whereby the expert system selectively backfills power from connected electric vehicles to the power grid through a grid tie inverter (if present) within the charging stations. In more traditional usage, the expert system allows for electric vehicle charging, coupled with user preferences as to charge time, charge cost, and charging station capabilities, without exceeding the power grid capacity at any point. A robust yet accurate state of charge (SOC) calculation method is also presented, whereby initially an open circuit voltage (OCV) based on sampled battery voltages and currents is calculated, and then the SOC is obtained based on a mapping between a previously measured reference OCV (ROCV) and SOC. The OCV-SOC calculation method accommodates likely any battery type with any current profile.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {5}
}
Works referenced in this record:
Method and apparatus for determination of battery run-time in uninterruptible power system
patent, March 1994
- Stich, Frederick A.; Beistle, Edward G.
- US Patent Document 5,295,078
Methods And Apparatus Using Hierarchical Priority And Control Algorithms For Grid-Integrated Vehicles
patent-application, September 2009
- Kempton, Willett
- US Patent Application 12/397030; 20090222143
Plugin Hybrid Electric Vehicle With V2G Optimization System
patent-application, September 2009
- Hafner, James Lee; Schurr, Allan James
- US Patent Application 12/048183; 20090229900
Mobile Intelligent Metering And Charging System For Charging Uniquely Identifiable Chargeable Vehicle Destinations And Method For Employing Same
patent-application, October 2009
- Housh, Richard; Yurkovich, Benjamin Joseph
- US Patent Application 12/277617; 20090259603
Generating Energy Transaction Plans
patent-application, December 2009
- Hafner, James Lee; O'Mara, Melissa Wiltsey; Williamson, Paul Stuart
- US Patent Application 12/139565; 20090313033
Grid Regulation Services For Energy Storage Devices Based On Grid Frequency
patent-application, August 2012
- Pratt, Richard M.; Hammerstrom, Donald J.; Kintner-Meyer, Michael C.W.
- US Patent Application 13/443620; 20120200160
Works referencing / citing this record:
Smart electric vehicle (EV) charging and grid integration apparatus and methods
patent, May 2015
- Gadh, Rajit; Mal, Siddhartha; Prabhu, Shivanand
- US Patent Document 9,026,347
Smart electric vehicle (EV) charging and grid integration apparatus and methods
patent, May 2015
- Gadh, Rajit; Mal, Siddhartha; Prabhu, Shivanand
- US Patent Document 9,026,347
Smart electric vehicle (EV) charging and grid integration apparatus and methods
patent, May 2015
- Gadh, Rajit; Mal, Siddhartha; Prabhu, Shivanand
- US Patent Document 9,026,347
Smart electric vehicle (EV) charging and grid integration apparatus and methods
patent, May 2015
- Gadh, Rajit; Mal, Siddhartha; Prabhu, Shivanand
- US Patent Document 9,026,347
Smart electric vehicle (EV) charging and grid integration apparatus and methods
patent, May 2015
- Gadh, Rajit; Mal, Siddhartha; Prabhu, Shivanand
- US Patent Document 9,026,347