Power storage device and mobile electronic device having the same

• US 20070278998A1
• Filed: 05/25/2007
• Published: 12/06/2007
• Est. Priority Date: 06/02/2006
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Koyama, Jun
• Granted Patent: US 8,132,026 B2
• Time in Patent Office: Days
• US Class Current: 320/109
• 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 50/402 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 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence

Abstract

To provide a power storage device for regularly supplying power to a mobile electronic device, in which charging of a battery by a power feeder can be simplified and even when power stored in the battery is not enough, power can be regularly supplied to the mobile electronic device. The mobile electronic device includes an antenna circuit which receives power supply via radio signals, a battery which stores power, and a power supply control circuit which includes a switch circuit for intermittently supplying power to a load. Power supply to the load is intermittently controlled by controlling the switch circuit, which is provided in the power supply control circuit for controlling the supply of power stored in the battery, using a signal from a low-frequency-signal generating circuit.

Claims

1. A power storage device comprising:

an antenna circuit, a power supply control circuit, and a battery portion,

wherein the power supply control circuit includes;

a rectifier circuit which rectifies a signal received at the antenna circuit, a switch circuit, a low-frequency-signal generating circuit, and a power supply circuit;

wherein the battery portion includes a battery which is charged with a signal rectified by the rectifier circuit; and

wherein the switch circuit is a circuit which controls power supplied to the power supply circuit from the battery or from the antenna circuit, using a signal from the low-frequency-signal generating circuit.

7. The power storage device according to claim 1, wherein the battery is one selected from the group consisting 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.

11. The power storage device according to claim 1, wherein the battery includes a current-collecting thin film, a negative electrode active material layer over the current-collecting thin film, a solid electrolyte layer over the negative electrode active material layer, a positive electrode active material layer over the solid electrolyte layer, and a current-collecting thin film over the positive electrode active material layer.

15. The power storage device according to claim 1, wherein the antenna circuit receives a radio signal by an electromagnetic induction method.

19. The power storage device according to claim 1, further comprising a booster antenna, wherein the antenna circuit receives a signal for charging the battery via the booster antenna.

23. The power storage device according to claim 1, wherein the antenna circuit includes a plurality of antennas.

27. The power storage device according to claim 1, wherein the low-frequency-signal generating circuit is a circuit which generates a signal to be output to the switch circuit by dividing a frequency of a generated clock signal.

31. The power storage device according to claim 1, wherein the power storage device is applied to an electronic device selected from the group consisting of a digital video camera, a computer, a portable information terminal and an image reproducing device provided with recording media;

an IC label, an IC tag, or an IC card which are attached to a bill, a coin, a security, a bearer bond, a certificate, a packaging container, a recording media, means of transportation, personal belongings, foods, plants, animals, human bodies, clothes, daily articles or electronic devices.

2. A power storage device comprising:

an antenna circuit, a power supply control circuit, and a battery portion,

wherein the power supply control circuit includes;

a rectifier circuit which rectifies a signal received at the antenna circuit, a control circuit, a switch circuit, a low-frequency-signal generating circuit, and a power supply circuit;

wherein the battery portion includes a battery which is charged with a signal rectified by the rectifier circuit;

wherein the control circuit is a circuit which selects power to be supplied to the switch circuit by comparing power supplied from the antenna circuit with power supplied from the battery; and

wherein the switch circuit is a circuit which controls the power selected by the control circuit to be output to the power supply circuit, using a signal from the low-frequency-signal generating circuit.

5. The power storage device according to claim 2,

wherein the control circuit connects the battery and the switch circuit when the power from the antenna circuit is lower than the power from the battery;

and

wherein the control circuit does not connect the battery and the switch circuit when the power from the battery is lower than the power from the antenna circuit.

8. The power storage device according to claim 2, wherein the battery is one selected from the group consisting 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 power storage device according to claim 2, wherein the battery includes a current-collecting thin film, a negative electrode active material layer over the current-collecting thin film, a solid electrolyte layer over the negative electrode active material layer, a positive electrode active material layer over the solid electrolyte layer, and a current-collecting thin film over the positive electrode active material layer.

16. The power storage device according to claim 2, wherein the antenna circuit receives a radio signal by an electromagnetic induction method.

20. The power storage device according to claim 2, further comprising a booster antenna, wherein the antenna circuit receives a signal for charging the battery via the booster antenna.

24. The power storage device according to claim 2, wherein the antenna circuit includes a plurality of antennas.

28. The power storage device according to claim 2, wherein the low-frequency-signal generating circuit is a circuit which generates a signal to be output to the switch circuit by dividing a frequency of a generated clock signal.

32. The power storage device according to claim 2, wherein the power storage device is applied to an electronic device selected from the group consisting of a digital video camera, a computer, a portable information terminal and an image reproducing device provided with recording media;

an IC label, an IC tag, or an IC card which are attached to a bill, a coin, a security, a bearer bond, a certificate, a packaging container, a recording media, means of transportation, personal belongings, foods, plants, animals, human bodies, clothes, daily articles or electronic devices.

3. A power storage device comprising:

an antenna circuit, a power supply control circuit, and a battery portion,

wherein the power supply control circuit includes;

a rectifier circuit which rectifies a signal received at the antenna circuit, a switch circuit, a low-frequency-signal generating circuit, and a power supply circuit;

wherein the battery portion includes;

a battery which is charged with a signal rectified by the rectifier circuit, and a charging management circuit;

wherein the charging management circuit is a circuit which manages a charged amount of the battery; and

wherein the switch circuit is a circuit which controls power supplied to the power supply circuit from the battery or from the antenna circuit, using a signal from the low-frequency-signal generating circuit.

9. The power storage device according to claim 3, wherein the battery is one selected from the group consisting 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.

13. The power storage device according to claim 3, wherein the battery includes a current-collecting thin film, a negative electrode active material layer over the current-collecting thin film, a solid electrolyte layer over the negative electrode active material layer, a positive electrode active material layer over the solid electrolyte layer, and a current-collecting thin film over the positive electrode active material layer.

17. The power storage device according to claim 3, wherein the antenna circuit receives a radio signal by an electromagnetic induction method.

21. The power storage device according to claim 3, further comprising a booster antenna, wherein the antenna circuit receives a signal for charging the battery via the booster antenna.

25. The power storage device according to claim 3, wherein the antenna circuit includes a plurality of antennas.

29. The power storage device according to claim 3, wherein the low-frequency-signal generating circuit is a circuit which generates a signal to be output to the switch circuit by dividing a frequency of a generated clock signal.

33. The power storage device according to claim 3, wherein the power storage device is applied to an electronic device selected from the group consisting of a digital video camera, a computer, a portable information terminal and an image reproducing device provided with recording media;

an IC label, an IC tag, or an IC card which are attached to a bill, a coin, a security, a bearer bond, a certificate, a packaging container, a recording media, means of transportation, personal belongings, foods, plants, animals, human bodies, clothes, daily articles or electronic devices.

4. A power storage device comprising:

an antenna circuit, a power supply control circuit, and a battery portion,

wherein the power supply control circuit includes;

a rectifier circuit which rectifies a signal received at the antenna circuit, a control circuit, a switch circuit, a low-frequency-signal generating circuit, and a power supply circuit;

wherein the battery portion includes;

a battery which is charged with a signal rectified by the rectifier circuit, and a charging management circuit;

wherein the charging management circuit is a circuit which manages a charged amount of the battery;

wherein the control circuit is a circuit which selects power to be supplied to the switch circuit by comparing power supplied from the antenna circuit with power supplied from the battery; and

wherein the switch circuit is a circuit which controls the power selected by the control circuit to be output to the power supply circuit, using a signal from the low-frequency-signal generating circuit.

6. The power storage device according to claim 4,

wherein the control circuit connects the battery and the switch circuit when the power from the antenna circuit is lower than the power from the battery;

and

wherein the control circuit does not connect the battery and the switch circuit when the power from the battery is lower than the power from the antenna circuit.

10. The power storage device according to claim 4, wherein the battery is one selected from the group consisting 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.

14. The power storage device according to claim 4, wherein the battery includes a current-collecting thin film, a negative electrode active material layer over the current-collecting thin film, a solid electrolyte layer over the negative electrode active material layer, a positive electrode active material layer over the solid electrolyte layer, and a current-collecting thin film over the positive electrode active material layer.

18. The power storage device according to claim 4, wherein the antenna circuit receives a radio signal by an electromagnetic induction method.

22. The power storage device according to claim 4, further comprising a booster antenna, wherein the antenna circuit receives a signal for charging the battery via the booster antenna.

26. The power storage device according to claim 4, wherein the antenna circuit includes a plurality of antennas.

30. The power storage device according to claim 4, wherein the low-frequency-signal generating circuit is a circuit which generates a signal to be output to the switch circuit by dividing a frequency of a generated clock signal.

34. The power storage device according to claim 4, wherein the power storage device is applied to an electronic device selected from the group consisting of a digital video camera, a computer, a portable information terminal and an image reproducing device provided with recording media;

an IC label, an IC tag, or an IC card which are attached to a bill, a coin, a security, a bearer bond, a certificate, a packaging container, a recording media, means of transportation, personal belongings, foods, plants, animals, human bodies, clothes, daily articles or electronic devices.