Coordinated control of electric vehicle charging and HVAC

• US 9,577,291 B2
• Filed: 02/20/2012
• Issued: 02/21/2017
• Est. Priority Date: 02/22/2011
• Status: Active Grant

• Current Assignee: Ademco Inc. (Resideo Technologies, Inc.)
• Original Assignee: Honeywell International Inc.
• Inventors: Kolavennu, Soumitri N., Kaufman, David R.
• Primary Examiner(s): Bradford, Jonathan
• Assistant Examiner(s): MARTIN, ELIZABETH J
• Application Number:
  US13/400,495
• Publication Number:
  US 20120210733A1
• Time in Patent Office: 1,828 Days
• Field of Search: 622/281, 622/30
• US Class Current: 1/1
• CPC Class Codes: B60H 1/00278 for the battery arrangement of batteries B60R16/04
• CPC Class Codes: B60H 1/00392 for electric vehicles having only electric drive means
• CPC Class Codes: B60L 1/06 using only one supply
• CPC Class Codes: B60L 53/63 in response to network capacity
• CPC Class Codes: G05D 23/19 characterised by the use of electric means G05D23/1393 takes precedence
• CPC Class Codes: H01M 10/42 Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells H01M10/60 takes precedence
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: 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]

Abstract

A system and method include receiving a temperature signal from a temperature sensor, controlling operation of an air conditioner condenser, and controlling an electric vehicle charger to operate to charge an electric vehicle battery only when the air conditioner condenser is not running.

Claims

1. A system comprising:

an input to receive indoor temperature measurements;

an air conditioner control output to couple to an air conditioner compressor to provide control signals to the air conditioner;

an electric vehicle battery charger output to couple to an electrical vehicle battery charger to provide control signals to the electric vehicle battery charger; and

a controller to receive the indoor temperature measurements and provide the control signals on the outputs to ensure the electric vehicle battery charger is operating only when the air conditioner compressor is not running, wherein the controller is a thermostat that selects either the air conditioner or the electric vehicle battery charger to run as a function of an air conditioner compressor duty cycle.

2. The system of claim 1 and further comprising an input to receive a battery charge signal.

3. The system of claim 1 and further comprising an input to receive a signal representing power drawn from the grid.

4. The system of claim 1 wherein the controller selects either the air conditioner or the electric vehicle battery charger to run as a function of an air conditioner dead band control, and wherein the controller widens the dead band responsive to a need to charge the battery.

5. The system of claim 1 wherein the controller selects either the air conditioner or the electric vehicle battery charger to run as a function of an air conditioner dead band control, and wherein the controller modifies a thermostat set point and the dead band responsive to battery charge.

6. The system of claim 1 wherein the controller selects either the air conditioner or the electric vehicle battery charger to run as a function of an air conditioner dead band control, and wherein the controller modifies the dead band responsive to outdoor temperature.

7. A system comprising:

an input to receive indoor temperature measurements;

an air conditioner control output to couple to an air conditioner compressor to provide control signals to the air conditioner;

an electric vehicle battery charger output to couple to an electrical vehicle battery charger to provide control signals to the electric vehicle battery charger; and

a controller to receive the indoor temperature measurements and provide the control signals on the outputs to ensure the electric vehicle battery charger is operating only when the air conditioner compressor is not running, wherein the controller is a thermostat that selects either the air conditioner or the electric vehicle battery charger to run as a function of an air conditioner dead band control, and wherein the controller adjusts the dead band as a function of battery charge.

8. The system of claim 7 wherein the dead band control has a lower limit and an upper limit around a set point, and wherein the electric vehicle battery charger is turned off when the upper limit is reached, and wherein at least one limit is adjustable by the controller as a function of outdoor temperature.

9. The system of claim 8 wherein the electric vehicle battery charger is turned on when the lower limit is reached.

10. A thermostat comprising:

an input to receive temperature measurements;

an air conditioner control output to couple to an air conditioner compressor to provide control signals to the air conditioner compressor;

an electric vehicle battery charger output to couple to an electrical vehicle battery charger to provide control signals to the electric vehicle battery charger;

an input to receive a battery charge state; and

a controller to receive the inputs and provide the control signals on the outputs to ensure that only the air conditioner compressor or the electric vehicle battery charger is operating at a given time, wherein the controller selects either the air conditioner or the electric vehicle battery charger to run as a function of an air conditioner dead band control and further modifies the air conditioner dead band based on detected charge state of the battery.

11. The system of claim 10 wherein the controller widens the dead band responsive to a need to charge the battery.

12. The system of claim 10 wherein the controller modifies a thermostat set point and the dead band responsive to battery charge.

13. The system of claim 10 wherein the controller modifies the hand responsive to outdoor temperature.