VEHICULAR ELECTRIC POWER SUPPLY DEVICE AND ELECTRIC POWER SUPPLY SYSTEM

• US 20120228928A1
• Filed: 01/26/2012
• Published: 09/13/2012
• Est. Priority Date: 03/11/2011
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: OBAYASHI, Kazuyoshi, ASADA, Hiroshige, FUJITA, Mitsuru
• Granted Patent: US 9,083,193 B2
• Time in Patent Office: Days
• US Class Current: 307/9.1
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 3/0092 with use of redundant elements for safety purposes
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• 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: H02J 1/10 Parallel operation of dc sources
• CPC Class Codes: H02J 7/342 The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging with circuits for polarity protection H02J7/0034
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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

The electric power supply system includes a stationary device and a mobile device. The mobile device includes a rotary electric machine driven by an engine, a vehicular battery which is used to move the vehicle, and an emergency battery. The stationary battery in the stationary device may be charged by either one of the rotary electric machine, the stationary battery or the emergency battery via an inter-battery power line. The amount of charge to the stationary battery is set based on an amount of necessary power WRQ which the stationary device needs, and an amount of available power WVH which the mobile device can supply. The stationary battery can be charged in an efficient manner and with a sufficient amount of electric power.

Claims

1. An electric power supply system comprising:

a stationary device including a stationary battery;

a mobile device including a plurality of vehicular power sources including a generator driven by an engine and a vehicular battery; and

an inter-battery power connection arranged between the stationary battery and the vehicular battery, wherein

the stationary device includes a stationary setting module to set up an amount of necessary power which the stationary battery needs,

the mobile device includes

a vehicular setting module to set up an amount of available power which can be supplied by the plurality of vehicular power sources, and

a selecting module which selects one or more vehicular power source based on the amount of necessary power and the amount of available power, and activates the selected vehicular power source to supply electric power to the stationary battery via the inter-battery power connection.

2. The electric power supply system according to claim 1, wherein

the inter-battery power connection has a power capacity larger than that of a charge-and-discharge line for the stationary battery in the stationary device.

3. The electric power supply system according to claim 2, wherein

the engine is a source for moving the vehicle, and

the vehicular battery is a battery which supplies electric power to an electric motor for moving the vehicle and is charged by the generator.

4. The electric power supply system according to claim 1, wherein

the plurality of vehicular power sources includes a emergency battery which supplies power to rescue the vehicle and is separately disposed from the vehicular battery.

5. A vehicular electric power supply device comprising:

a plurality of vehicular power sources including a generator driven by an engine and a vehicular battery;

a vehicular setting module to set up an amount of available power which can be supplied by the plurality of vehicular power sources; and

a selecting module which selects one or more vehicular power source based on an amount of necessary power which a stationary battery in a stationary device needs and the amount of available power, and activates the selected vehicular power source to supply electric power to the stationary battery via an inter-battery power connection arranged between the stationary battery and the vehicular battery.

6. The vehicular electric power supply device according to claim 5, wherein

the inter-battery power connection has a power capacity larger than that of a charge-and-discharge line for the stationary battery in the stationary device.

7. The vehicular electric power supply device according to claim 6, wherein

the engine is a source for moving the vehicle, and

the vehicular battery is a battery which supplies electric power to an electric motor for moving the vehicle and is charged by the generator.

8. The vehicular electric power supply device according to claim 5, wherein

the plurality of vehicular power sources includes a emergency battery which supplies power to rescue the vehicle and is separately disposed from the vehicular battery.