Power storage device and semiconductor device provided with the power storage device

• US 20080252254A1
• Filed: 08/13/2007
• Published: 10/16/2008
• Est. Priority Date: 08/31/2006
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Osada, Takeshi
• Granted Patent: US 7,764,046 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01M 10/0436 Small-sized flat cells or batteries for portable equipment
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• 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 50/23 characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• 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 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/007 Regulation of charging or discharging current or voltage
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: H02J 7/00714 in response to battery charging or discharging current
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: H02J 7/35 with light sensitive cells
• CPC Class Codes: H03D 9/00 Demodulation or transference of modulation of modulated electromagnetic waves demodulating light, transferring modulation in light waves G02F2/00
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

An object is to provide a power storage device provided with a battery that is a power storage means, for safe and accurate supply of electric power in a short period of time for drive power supply voltage without checking remaining capacity of the battery or changing batteries with deterioration over time of the battery for drive power supply voltage. The power storage device is provided with a battery that is a power storage means as a power supply for supplying electric power and a counter circuit for counting charging time of the power storage means. An electromagnetic wave with electric field intensity, magnetic field intensity, and power flux density per unit time which are transmitted from a power feeder are controlled, and the power storage means is efficiently charged using the electromagnetic wave in a short period of time.

Claims

1. A semiconductor device comprising:

an antenna;

a battery;

a power supply portion;

a charging determination circuit; and

a signal processing portion,

wherein the power supply portion includes a rectifier circuit that is connected to the antenna, a charging control circuit that is connected to the rectifier circuit, and a power supply circuit that is connected to the battery,

wherein the charging determination portion includes a demodulation circuit that demodulates a signal inputted to the antenna, a determination circuit that determines whether the battery is in a charging state or a non-charging state in accordance with the signal and outputs a signal that switches the charging state and the non-charging state, a counter circuit that counts charging time of the battery and outputs a signal to the determination circuit, and a modulation circuit that modulates a signal outputted from the antenna, and

wherein the modulation circuit modulates the signal outputted from the antenna so that the signal becomes a first signal, when the battery is determined to be in the charging state by the determination circuit, or modulates the signal outputted from the antenna so that the signal becomes a second signal, when the battery is determined to be in the non-charging state by the determination circuit.

2. The semiconductor device according to claim 1, wherein the power supply circuit controls electric power to be supplied to the signal processing circuit, and the charging control circuit controls charging of the battery.

3. The semiconductor device according to claim 1, wherein the signal processing circuit includes an amplifier, a modulation circuit, a demodulation circuit, a logic circuit, a memory control circuit, and a memory circuit.

4. The semiconductor device according to claim 1, wherein the charging control circuit includes a regulator and a diode.

5. The semiconductor device according to claim 1, wherein the charging control circuit includes a regulator and a switch, and the switch is in a conductive state when the switch is determined to be in a charging state by the determination circuit and is in a nonconductive state when the switch is determined to be in a non-charging state by the determination circuit.

6. The semiconductor device according to claim 1, wherein the power supply circuit includes a regulator and a switch, and the switch is in a nonconductive state when the switch is determined to be in a charging state by the determination circuit and is in a conductive state when the switch is determined to be in a non-charging state by the determination circuit.

7. The semiconductor device according to claim 1, further comprising:

a Schmitt trigger;

a regulator; and

a switch,

wherein the switch is in a nonconductive state when switch is determined to be in a charging state by the determination circuit and is in a conductive state when the switch is determined to be in a non-charging state by the determination circuit.

8. The semiconductor device according to claim 1, wherein the semiconductor device is any one of an IC label, an IC tag, and an IC card.

9. A power storage device comprising:

an antenna;

a battery;

a power supply portion; and

a charging determination portion,

wherein the power supply portion includes a rectifier circuit that is connected to the antenna, a charging control circuit that is connected to the rectifier circuit, and a power supply circuit that is connected to the battery,

wherein the charging determination portion includes a demodulation circuit that demodulates a signal inputted to the antenna, a determination circuit that determines whether the battery is in a charging state or a non-charging state in accordance with the signal and outputs a signal that switches the charging state and the non-charging state, a counter circuit that counts charging time of the battery and outputs a signal to the determination circuit, and a modulation circuit that modulates a signal outputted from the antenna, and

wherein the modulation circuit modulates the signal outputted from the antenna so that the signal becomes a first signal, when the battery is determined to be in the charging state by the determination circuit, or modulates the signal outputted from the antenna so that the signal becomes a second signal, when the battery is determined to be in the non-charging state by the determination circuit.

10. The power storage device according to claim 9, wherein the power supply circuit controls electric power to be supplied to a load, and the charging control circuit controls charging of the battery.

11. The power storage device according to claim 9, wherein the charging control circuit includes a regulator and a diode.

12. The power storage device according to claim 9, wherein the charging control circuit includes a regulator and a switch, and the switch is in a conductive state when the switch is determined to be in a charging state by the determination circuit and is in a nonconductive state when the switch is determined to be in a non-charging state by the determination circuit.

13. The power storage device according to claim 9, wherein the power supply circuit includes a regulator and a switch, and the switch is in a nonconductive state when the switch is determined to be in a charging state by the determination circuit and is in a conductive state when the switch is determined to be in a non-charging state by the determination circuit.

14. The power storage device according to claim 9, wherein the power supply circuit includes a Schmitt trigger, a regulator, and a switch, and the switch is in a nonconductive state when the switch is determined to be in a charging state by the determination circuit and is in a conductive state when the switch is determined to be in a non-charging state by the determination circuit.

15. The power storage device according to claim 9, wherein the power supply circuit controls electric power to be supplied to a load;

the load is a signal processing circuit; and

the signal processing circuit includes an amplifier, a modulation circuit, a demodulation circuit, a logic circuit, a memory control circuit, and a memory circuit.

16. The power storage device according to claim 15, wherein the power storage device is any one of an IC label, an IC tag, and an IC card.

17. A power storage device comprising:

an antenna;

a battery;

a charging management circuit that is connected to the battery;

a power supply portion; and

a charging determination portion,

wherein the power supply portion includes a rectifier circuit that is connected to the antenna, a charging control circuit that is connected to the rectifier circuit, and a power supply circuit that is connected to the battery,

wherein the charging determination portion includes a demodulation circuit that demodulates a signal inputted to the antenna, a determination circuit that determines whether the battery is in a charging state or a non-charging state in accordance with the signal and outputs a signal that switches the charging state and the non-charging state, a counter circuit that counts charging time of the battery and outputs a signal to the determination circuit, and a modulation circuit that modulates a signal outputted from the antenna, and

wherein the modulation circuit modulates the signal outputted from the antenna so that the signal becomes a first signal, when the battery is determined to be in the charging state by the determination circuit, modulates the signal outputted from the antenna so that the signal becomes a second signal, when the battery is determined to be in the non-charging state by the determination circuit, or modulates the signal outputted from the antenna in accordance with a signal from the charging management circuit so that the signal becomes a third signal.

18. The power storage device according to claim 17, wherein the power supply circuit controls electric power to be supplied to a load, and the charging control circuit controls charging of the battery.

19. The power storage device according to claim 17, wherein the charging control circuit includes a regulator and a diode.

20. The power storage device according to claim 17, wherein the charging control circuit includes a regulator and a switch, and the switch is in a conductive state when the switch is determined to be in a charging state by the determination circuit and is in a nonconductive state when the switch is determined to be in a non-charging state by the determination circuit.

21. The power storage device according to claim 17, wherein the power supply circuit includes a regulator and a switch, and the switch is in a nonconductive state when the switch is determined to be in a charging state by the determination circuit and is in a conductive state when the switch is determined to be in a non-charging state by the determination circuit.

22. The power storage device according to claim 17, wherein the power supply circuit includes a Schmitt trigger, a regulator, and a switch, and the switch is in a nonconductive state when the switch is determined to be in a charging state by the determination circuit and is in a conductive state when the switch is determined to be in a non-charging state by the determination circuit.

23. The power storage device according to claim 17, wherein the power supply circuit controls electric power to be supplied to a load;

the load is a signal processing circuit; and

the signal processing circuit includes an amplifier, a modulation circuit, a demodulation circuit, a logic circuit, a memory control circuit, and a memory circuit.

24. The power storage device according to claim 23, wherein the power storage device is any one of an IC label, an IC tag, and an IC card.