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

• US 9,620,988 B2
• Filed: 01/26/2016
• Issued: 04/11/2017
• 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
• Primary Examiner(s): DIAO, M BAYE
• Application Number:
  US15/006,664
• Publication Number:
  US 20160156218A1
• Time in Patent Office: 441 Days
• Field of Search: 320108
• 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:

a conductive film configured to receive an electromagnetic wave;

a rectifier circuit electrically connected to the conductive film;

a power supply portion comprising the rectifier circuit, the power supply portion being operationally connected to the conductive film and to a signal processing circuit;

a battery operationally connected to the power supply portion; and

a charging determination portion operationally connected to the power supply portion and the conductive film,

wherein the power supply portion is configured to output electric power,

wherein the signal processing circuit and the battery are configured to be input with the electric power output from the power supply portion, and

wherein the charging determination portion counts charging time of the battery.

2. The semiconductor device according to claim 1, wherein the conductive film is an 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 is configured to output the electric power.

4. The semiconductor device according to claim 1,

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

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

5. The semiconductor device according to claim 1,

wherein the charging determination portion includes a determination circuit, and

wherein the determination circuit determines whether the battery is in a charging state or a non-charging state in accordance with a signal from the conductive film.

6. The semiconductor device according to claim 5,

wherein the charging determination portion includes a counter circuit, and

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

7. A semiconductor device comprising:

a conductive film configured to receive an electromagnetic wave;

a rectifier circuit electrically connected to the conductive film;

a power supply portion comprising the rectifier circuit, the power supply portion being operationally connected to the conductive film;

a power generation element;

a battery operationally connected to the power supply portion and the power generation element; and

a charging determination portion operationally connected to the power supply portion and the conductive film,

wherein the power supply portion is configured to output electric power,

wherein the signal processing circuit and the battery are configured to be input with the electric power output form the power supply portion, and

wherein the charging determination portion counts charging time of the battery.

8. The semiconductor device according to claim 7, wherein the conductive film is an antenna.

9. The semiconductor device according to claim 7,

wherein the power supply portion includes a rectifier circuit and a charging control circuit, and

wherein the charging control circuit is configured to output the electric power.

10. The semiconductor device according to claim 7,

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

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

11. The semiconductor device according to claim 7,

wherein the charging determination portion includes a determination circuit, and

wherein the determination circuit determines whether the battery is in a charging state or a non-charging state in accordance with a signal from the conductive film.

12. The semiconductor device according to claim 11,

wherein the charging determination portion includes a counter circuit, and

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

13. The semiconductor device according to claim 7,

wherein the power generation element comprises any one of a solar battery, a piezoelectric element, and a micro electro mechanical system.