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

• US 7,944,172 B2
• Filed: 07/21/2010
• Issued: 05/17/2011
• Est. Priority Date: 08/31/2006
• Status: Expired due to Fees

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Osada, Takeshi
• Primary Examiner(s): Tso; Edward
• Assistant Examiner(s): DIAO, M BAYE
• Application Number:
  US12/840,373
• Publication Number:
  US 20100283425A1
• Time in Patent Office: 300 Days
• Field of Search: 320/108
• 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 power supply portion electrically connected to the antenna;

a battery electrically connected to the power supply portion; and

a counter circuit electrically connected to the power supply portion,

wherein the counter circuit counts charging time of the battery,

wherein the counter circuit includes flip flop circuits,

wherein the power supply portion includes a power supply circuit, and

wherein the power supply circuit controls a voltage level of an electric signal outputted from the battery.

2. The semiconductor device according to claim 1, wherein the power supply portion includes a rectifier circuit that rectifies an electromagnetic wave inputted to the antenna.

3. The semiconductor device according to claim 1, wherein the power supply portion includes a rectifier circuit and a charging control circuit, and

wherein the charging control circuit controls charging of the battery with electric power from the rectifier circuit.

4. The semiconductor device according to claim 1, wherein the power supply portion includes transistors formed using a single crystal substrate.

5. The semiconductor device according to claim 1, wherein the power supply portion includes transistors formed using an n-type semiconductor substrate.

6. A semiconductor device comprising:

antennas;

a power supply portion electrically connected to at least one of the antennas;

a battery electrically connected to the power supply portion; and

a counter circuit electrically connected to the power supply portion,

wherein the counter circuit counts charging time of the battery,

wherein the counter circuit includes flip flop circuits,

wherein the power supply portion includes a power supply circuit, and

wherein the power supply circuit controls a voltage level of an electric signal outputted from the battery.

7. The semiconductor device according to claim 6, wherein the power supply portion includes a rectifier circuit that rectifies an electromagnetic wave inputted to the antennas.

8. The semiconductor device according to claim 6, wherein the power supply portion includes a rectifier circuit and a charging control circuit, and

wherein the charging control circuit controls charging of the battery with electric power from the rectifier circuit.

9. The semiconductor device according to claim 6, wherein the power supply portion includes transistors formed using a single crystal substrate.

10. The semiconductor device according to claim 6, wherein the power supply portion includes transistors formed using an n-type semiconductor substrate.

11. A semiconductor device comprising:

an antenna;

a rectifier circuit electrically connected to the antenna;

a determination circuit electrically connected to the antenna;

a battery;

a counter circuit electrically connected to the rectifier circuit and the determination circuit, and

wherein the determination circuit determines whether the battery is in a charging state or in a non-charging state in accordance with a signal inputted from the antenna and outputs a signal for switching the charging state and the non-charging state,

wherein the counter circuit counts charging time of the battery and outputs the counted time to the determination circuit.

12. The semiconductor device according to claim 11, further comprising:

a power supply circuit electrically connected to the battery, and

wherein the power supply circuit controls a voltage level of an electric signal outputted from the battery.

13. The semiconductor device according to claim 11, wherein the counter circuit includes flip flop circuits.

14. The semiconductor device according to claim 11, further comprising:

a modulation circuit electrically connected to the antenna, and

wherein the modulation circuit modulates a signal to be outputted to an external portion in accordance with the charging state or the non-charging state determined by the determination circuit.