Electric power supply system and electric power supply system for motor vehicle

• US 8,712,481 B2
• Filed: 07/22/2010
• Issued: 04/29/2014
• Est. Priority Date: 03/15/2006
• Status: Expired due to Fees

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Shionoiri, Yutaka, Koyama, Jun, Kurokawa, Yoshiyuki, Yamazaki, Shunpei, Ikeda, Takayuki, Osada, Takeshi, Atsumi, Tomoaki, Ishii, Masato
• Primary Examiner(s): Ho, Huy C
• Application Number:
  US12/841,381
• Publication Number:
  US 20100289331A1
• Time in Patent Office: 1,377 Days
• Field of Search: 455/572, 455/569.2, 455/571, 455/573, 455/575.9
• US Class Current: 455/572
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 8/003 Converting light into electric energy, e.g. by using photo-voltaic systems
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/27 characterised by the type of receiving antennas, e.g. rectennas
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• 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

Abstract

To provide for a movable electronic device a power receiving device that when charging a battery, simplifies charging of the battery from a power feeder, which is a power supply means, and does not have faults due to an external factor relating to a relay terminal, or damage of the relay terminal, that are caused by directly connecting the battery and the power feeder, and further, to provide an electronic device including the power receiving device. An antenna circuit and a booster antenna for supplying electric power are provided in a movable electronic device. The antenna circuit receives a radio signal such as an electromagnetic wave via the booster antenna, and electric power that is obtained through the receiving of the radio signal is supplied to the battery through a signal processing circuit.

Claims

1. An electric power supply system for motor vehicle comprising:

an antenna circuit in a motor vehicle;

an antenna comprised in the antenna circuit;

a booster antenna configured to be provided in the motor vehicle and to be electromagnetically coupled to the antenna by magnetic field;

a signal processing circuit electrically connected to the antenna circuit;

a battery electrically connected to the signal processing circuit; and

a spark plug electrically connected to the signal processing circuit,

wherein the antenna comprised in the antenna circuit is configured to receive, via the booster antenna, a radio signal emitted by a power feeder,

wherein the antenna circuit, the signal processing circuit, the battery and the spark plug are parts of the motor vehicle,

wherein the battery is charged by the radio signal emitted by the power feeder and processed by the signal processing circuit, and

wherein the spark plug is configured to be ignited by electric power stored in the battery and to start up a combustion engine of the motor vehicle.

2. The electric power supply system for motor vehicle according to claim 1, wherein the signal processing circuit includes a rectifier circuit and a power supply circuit.

3. The electric power supply system for motor vehicle according to claim 1, wherein the battery supplies electric power to a power supply circuit included in the signal processing circuit.

4. The electric power supply system for motor vehicle according to claim 1, wherein the battery includes at least one of a lithium battery, a lithium polymer battery, a lithium ion battery, a nickel metal hydride battery, a nickel cadmium battery, an organic radical battery, a lead-acid battery, an air secondary battery, a nickel-zinc battery, a silver-zinc battery, and a capacitor.

5. The electric power supply system according to claim 1,

further comprising a sensor which is functionally connected to the power feeder and is configured to detect presence of the motor vehicle, and

wherein the sensor is a piezoelectric sensor.

6. The electric power supply system according to claim 1, further comprising an electricity generation element electrically connected to the battery.

7. The electric power supply system according to claim 6, wherein the electricity generation element is a generator employing motive power of the combustion engine.

15. The electric power supply system according to claim 1,

wherein the antenna and the booster antenna are configured so that the radio signal emitted by the power feeder is resonated by the booster antenna and transmitted to the antenna by electromagnetic induction caused by magnetic coupling between the booster antenna and the antenna.

17. The electric power supply system according to claim 1,

wherein the booster antenna is provided around a circumference of the motor vehicle.

19. The electric power supply system according to claim 1,

wherein the booster antenna is provided in a windscreen of the motor vehicle.

8. An electric power supply system for motor vehicle comprising:

an antenna circuit in a motor vehicle;

an antenna comprised in the antenna circuit;

a booster antenna configured to be provided in the motor vehicle and to be electromagnetically coupled to the antenna by magnetic field;

a signal processing circuit electrically connected to the antenna circuit; and

a battery electrically connected to the signal processing circuit,

wherein the antenna comprised in the antenna circuit is configured to receive, via the booster antenna, a radio signal emitted by a power feeder, and

wherein the battery is charged by the radio signal processed by the signal processing circuit.

9. The electric power supply system for motor vehicle according to claim 8, wherein the signal processing circuit includes a rectifier circuit and a power supply circuit.

10. The electric power supply system for motor vehicle according to claim 8, wherein the battery supplies electric power to a power supply circuit included in the signal processing circuit.

11. The electric power supply system for motor vehicle according to claim 8, wherein the battery includes at least one of a lithium battery, a lithium polymer battery, a lithium ion battery, a nickel metal hydride battery, a nickel cadmium battery, an organic radical battery, a lead-acid battery, an air secondary battery, a nickel-zinc battery, a silver-zinc battery, and a capacitor.

12. The electric power supply system according to claim 8,

further comprising a sensor which is functionally connected to the power feeder and is configured to detect presence of the motor vehicle, and

wherein the sensor is a piezoelectric sensor.

13. The electric power supply system according to claim 8, further comprising an electricity generation element electrically connected to the battery.

14. The electric power supply system according to claim 13, wherein the electricity generation element is a generator employing motive power of a combustion engine.

16. The electric power supply system according to claim 8,

wherein the antenna and the booster antenna are configured so that the radio signal emitted by the power feeder is resonated by the booster antenna and transmitted to the antenna by electromagnetic induction caused by magnetic coupling between the booster antenna and the antenna.

18. The electric power supply system according to claim 8,

wherein the booster antenna is provided around a circumference of the motor vehicle.

20. The electric power supply system according to claim 8,

wherein the booster antenna is provided in a windscreen of the motor vehicle.