Electric Power Supply System and Controller of Vehicle that can Supply Electric Power to Outside

• US 20130184968A1
• Filed: 01/09/2013
• Published: 07/18/2013
• Est. Priority Date: 01/13/2012
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: KUMANO, Kengo, SUKEGAWA, Yoshihiro, SHIRAISHI, Takuya, ORYOJI, Kazuhiro
• Application Number:
  US13/737,077
• Publication Number:
  US 20130184968A1
• Time in Patent Office: Days
• US Class Current: 701/102
• CPC Class Codes: B60K 11/00 Arrangement in connection with cooling of propulsion units heating the interior space B60H; cooling internal combustion engines per se F01P
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60L 1/006 to power outlets
• CPC Class Codes: B60L 2270/12 of exhaust
• CPC Class Codes: B60L 50/10 using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
• CPC Class Codes: B60L 53/302 Cooling of charging equipment
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: B60W 10/04 including control of propulsion units
• CPC Class Codes: B60W 20/11 using model predictive control [MPC] strategies, i.e. control methods based on models predicting performance utilising navigation and traffic information in the control strategy B60W20/12
• CPC Class Codes: B60W 2510/068 Engine exhaust temperature
• CPC Class Codes: B60W 2510/305 Power absorbed by auxiliaries
• CPC Class Codes: B60W 2710/06 Combustion engines, Gas turbines
• CPC Class Codes: B60W 30/1882 characterised by the working point of the engine, e.g. by using engine output chart
• CPC Class Codes: B60W 50/0097 Predicting future conditions
• CPC Class Codes: F02D 29/06 peculiar to engines driving electric generators
• CPC Class Codes: F02D 41/0055 Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
• CPC Class Codes: F02D 41/021 Introducing corrections for particular conditions exterior to the engine conjoint control of vehicle sub-units for propelling the vehicle B60W30/18
• CPC Class Codes: F02D 43/00 Conjoint electrical control of two or more functions, e.g. ignition, fuel-air mixture, recirculation, supercharging or exhaust-gas treatment
• CPC Class Codes: F02D 45/00 Electrical control not provided for in groups F02D41/00 - F02D43/00
• CPC Class Codes: F02N 11/084 State of vehicle accessories, e.g. air condition or power steering
• CPC Class Codes: F02N 2200/061 : Battery state of charge [SOC]
• CPC Class Codes: H02J 1/10 : Parallel operation of dc sources
• CPC Class Codes: H02J 3/003 : Load forecast, e.g. methods or systems for forecasting future load demand
• CPC Class Codes: H02J 3/007 : Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing uninterruptable power supply H02J9/00
• CPC Class Codes: H02J 3/28 : Arrangements for balancing of the load in a network by storage of energy
• CPC Class Codes: H02J 3/466 : Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
• CPC Class Codes: H02J 4/00 : Circuit arrangements for mains or distribution networks not specified as ac or dc
• CPC Class Codes: Y02E 60/00 : Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02T 10/40 : Engine management systems
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• 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

Provided is an electric power supply system which includes a plurality of electric power sources and supplies electric power corresponding to demanded electric power. In supplying electric power to the outside from a vehicle which constitutes one of the electric power sources, the electric power supply system realizes generation of power by an engine at high efficiency while maintaining a balance between power income and expenditure. In supplying electric power from the vehicle, an amount of electric power generated by an engine mounted on the vehicle is decided based on information supplied from an external device such as transition over time in an amount of electric power demand including future prediction and transition over time in an amount of electric power which is suppliable from other electric power sources including future prediction.

Claims

1. An electric power supply system comprising a plurality of electric power sources and being configured to switch the electric power sources in supplying electric power corresponding to demanded electric power, wherein the electric power sources include the supply of electric power from a vehicle.

2. The electric power supply system according to claim 1, wherein a controlled variable of an engine mounted on the vehicle is decided based on information supplied from an external device electrically connected to the vehicle in performing the supply of electric power from the vehicle.

3. The electric power supply system according to claim 2, wherein the information supplied from the external device includes either one of transition over time in an amount of electric power demand including future prediction and transition over time in an amount of electric power which is suppliable from other electric power sources including future prediction.

4. The electric power supply system according to claim 2, wherein the controlled variable of the engine is an exhaust gas recirculation amount, and the engine is controlled such that the exhaust gas recirculation amount in a case where the increase in the amount of electric power demand is expected within a fixed period as counted from a present time becomes larger than the exhaust gas recirculation amount in a case where the increase in the amount of electric power demand is not expected within a period from a present time to a time after the lapse of a fixed time.

5. The electric power supply system according to claim 1, wherein the electric power supply system includes a plurality of electric power usage modes, and switches, when an electric power demand exceeds a limit amount of suppliable electric power of the electric power source, the electric power usage modes corresponding to the limit amount of suppliable electric power.

6. The electric power supply system according to claim 5, wherein the electric power usage modes include an energy basic electric power mode where the electric power supply to the electric power supply system per se is assumed.

7. The electric power supply system according to claim 5, wherein the electric power usage modes include a local infrastructure electric power mode where the electric power supply connected to a local infrastructure is assumed.

8. The electric power supply system according to claim 5, wherein the electric power usage modes include a life environment improvement mode where the electric power supply leading to the life environment improvement is assumed.

9. The electric power supply system according to claim 5, wherein a maximum amount of electric power used in the mode is controlled in an ascending order of the energy basic electric power mode, the local infrastructure electric power mode, and the life environment improvement mode.

10. A controller of a vehicle capable of supplying electric power to the outside, wherein the vehicle is used as one of electric power sources in an electric power supply system which includes a plurality of electric power sources and switches electric power sources in supplying electric power corresponding to demanded electric power.

11. The controller of a vehicle according to claim 10, wherein a controlled variable of an engine mounted on the vehicle is decided based on information supplied from an external device electrically connected to the vehicle.

12. The controller of a vehicle according to claim 11, wherein the information supplied from the external device includes either one of transition over time in an amount of electric power demand including future prediction and transition over time in an amount of electric power which is suppliable from other electric power sources including future prediction.

13. The controller of a vehicle according to claim 11, wherein the information communication between the vehicle and the external device is performed using power line communications or a smartphone.

14. The controller of a vehicle according to claim 11, wherein the controlled variable of the engine is an amount of electric power generated by the engine, and the amount of electric power generated by the engine is controlled such that a change rate of the amount of electric power generated by the engine becomes smaller than a change rate of the amount of electric power demand.

15. The controller of a vehicle according to claim 14, wherein one of the electric power sources is a secondary battery, and an amount of electric power generated by the engine is decided corresponding to a cumulative value of an amount of electric power demand corresponding to a fixed period as counted from a present time and a storage amount of the secondary battery.

16. The controller of a vehicle according to claim 15, wherein when the amount of electric power generated by the engine becomes equal to or below a lower limit of an engine output at which electric power can be generated with specified efficiency, the generation of electric power by the engine is stopped.

17. The controller of a vehicle according to claim 11, wherein the controlled variable of the engine is an exhaust gas recirculation amount, and the engine is controlled such that the exhaust gas recirculation amount in a case where the increase in the amount of electric power demand is expected within a fixed period as counted from a present time becomes larger than the exhaust gas recirculation amount in a case where the increase in the amount of electric power demand is not expected within a fixed period as counted from a present time.

18. The controller of a vehicle according to claim 11, wherein the controlled variable of the engine is a cooling water temperature, and the engine is controlled such that the cooling water temperature in a case where the transition of the amount of electric power demand at a fixed value or less is expected within a fixed period as counted from a present time becomes higher than the cooling water temperature in a case where the transition of the amount of electric power demand at a fixed value or less is not expected within a fixed period as counted from a present time.

19. The controller of a vehicle according to claim 10, wherein electric power is generated using a household gas fuel instead of using a usual fuel such as gasoline or light oil as a fuel for the vehicle in supplying electric power to the outside from the vehicle.

20. A controller of a vehicle capable of supplying electric power to the outside, wherein an amount of electric power generated by an engine which is mounted on the vehicle is decided based on time transition information on an amount of an electric power demand including the future prediction obtained from an external device which is electrically connected with the vehicle.