# US 8,786,249 B2 · Frequency based electric vehicle charge controller system and method for implementing demand response and regulation services to power grid using frequency detection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,786,249 B2 - Document ID: US8786249B2 - Status: Granted - Kind: B2 - Application number: 13/204,092 - Filed: 2011-08-05 - Published: 2013-02-07 - Granted: 2014-07-22 - Earliest claimed: 2011-08-05 - Assignees: Uchicago Argonne, LLC - Applicants: Vladimir Koritarov - Inventors: Vladimir Koritarov - Web page: https://patentgrep.com/patent/US8786249B2 ## CPC - H02J 7/04: Regulation of charging current or voltage - B60L 53/14: Conductive energy transfer - B60L 53/62: in response to charging parameters, e.g. current, voltage or electrical charge - B60L 53/66: Data transfer between charging stations and vehicles - H02J 3/00142: {Oscillations concerning frequency} - H02J 3/322: {the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging} - H02J 7/34: Parallel operation in networks using both storage and other DC sources, e.g. providing buffering (H02J7/14 takes precedence) - H02J 7/90: Regulation of charging or discharging current or voltage - Y02E 60/00: Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - Y02T 90/12: Electric charging stations - Y02T 90/14: Plug-in electric vehicles - Y02T 90/16: Information or communication technologies improving the operation of electric vehicles - Y02T 90/167: Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV] - Y04S 10/126: the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G] - Y04S 30/12: Remote or cooperative charging - Y04S 30/14: Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS ## Abstract Frequency responsive charging for plug-in hybrid electric vehicles (PHEV) and battery electric vehicles (BEV), a frequency sensing charging system and a method are provided for implementing demand response and regulation services to power grid using frequency detection for a frequency-based charge controller for plug-in hybrid electric vehicles (PHEV) and battery electric vehicles (BEV). A frequency of the power grid is continuously monitored and compared to a predefined tolerance band by a frequency sensor. Responsive to the frequency being outside the predefined tolerance band, the frequency is applied to a programmable logic controller. The programmable logic controller uses the applied frequency to identify a control action. A charge controller and a switch coupled to a battery charger receive respective identified control actions for controlling the battery charger. ## Claims ### Claim 1 A method for implementing demand response and regulation services to an associated power grid used with a battery charger for plug-in hybrid electric vehicles (PHEV) and battery electric vehicles (BEV) comprising: providing a frequency sensor for continuously monitoring frequency of the power grid and comparing the monitored frequency to a predefined tolerance band; providing a programmable logic controller coupled to said frequency sensor; providing a charge controller and a switch coupled to said programmable logic controller and the battery charger; said frequency sensor, responsive to the frequency being outside the predefined tolerance band, applying the frequency to said programmable logic controller; said programmable logic controller using the applied frequency and identifying a control action; and said charge controller and switch receiving respective identified control actions from said programmable logic controller for controlling the battery charger. ### Claim 2 (depends on 1) The method as recited in claim 1 includes said programmable logic controller using the applied frequency and setting an action flag; said action flag being used together with the applied frequency to identify a change in the control action. ### Claim 3 (depends on 1) The method as recited in claim 1 wherein said programmable logic controller, responsive to the applied frequency being within a first frequency range, provides normal operation of the battery charger. ### Claim 4 (depends on 1) The method as recited in claim 1 wherein said programmable logic controller, responsive to the applied frequency being within a second frequency range, reduces a level of charge current, and sets an action flag to one. ### Claim 5 (depends on 1) The method as recited in claim 1 wherein said programmable logic controller, responsive to the applied frequency being less than a first set threshold value, opens said switch and sets an action flag to two, stopping operation of the battery charger. ### Claim 6 (depends on 5) The method as recited in claim 5 wherein said programmable logic controller, responsive to the applied frequency being less than a second set threshold value and an action flag is two, the switch remains opened, with operation of the battery charger stopped. ### Claim 7 (depends on 5) The method as recited in claim 5 wherein said programmable logic controller, responsive to the applied frequency being within a third frequency range, resumes reduced level of charge current of the battery charger and set an action flag to one. ### Claim 8 (depends on 1) The method as recited in claim 1 wherein said programmable logic controller, responsive to the applied frequency being within a fourth frequency range and the action flag is one or two, provides normal operation of the battery charger and sets an action flag to zero. ### Claim 9 (depends on 1) The method as recited in claim 1 wherein said programmable logic controller, responsive to the applied frequency being above the fourth frequency range and the action flag is zero, provides normal operation of the battery charger. ### Claim 10 (depends on 1) The method as recited in claim 1 includes a nominal frequency of the power grid is 60 Hz, and said programmable logic controller sets the reduced level of charge current of the battery charger to a 50% level of normal current charge responsive to the applied frequency within a predefined range between 59.5 Hz