Wireless power storage device, semiconductor device including the wireless power storage device, and method for operating the same

• US 20080079396A1
• Filed: 09/14/2007
• Published: 04/03/2008
• Est. Priority Date: 09/29/2006
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yamazaki, Shunpei, Osada, Takeshi
• Granted Patent: US 7,839,124 B2
• Time in Patent Office: Days
• US Class Current: 320/128
• CPC Class Codes: G06K 19/0702 the arrangement including a battery
• CPC Class Codes: G06K 19/0707 the arrangement being capable of collecting energy from external energy sources, e.g. thermocouples, vibration, electromagnetic radiation G06K19/0702 takes precedence
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H01M 6/40 Printed batteries , e.g. thin film batteries
• 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 50/20 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: Y02E 60/10 Energy storage using batteries

Abstract

To simplify charging of a battery in a power storage device which includes the battery. Further, to provide a wireless power storage device which can transmit and receive information without the task of replacing a battery for drive power supply, which becomes necessary when the battery depletes over time, being performed. An antenna circuit, a battery which is electrically connected to the antenna circuit via a rectifier circuit, and a load portion which is electrically connected to the battery are provided. The battery is charged when an electromagnetic wave received by the antenna circuit is input to the battery via the rectifier circuit, and discharged when electrical power which has been charged is supplied to the load portion. The battery is charged cumulatively, and the battery is discharged in pulses.

Claims

1. A wireless power storage device comprising:

an antenna circuit;

a rectifier circuit;

a battery;

a charge control circuit configured to control charging of the battery;

a discharge control circuit configured to control discharging of the battery wherein the discharge control circuit comprises a switch; and

a load portion electrically connected to the battery through the discharge control circuit,

wherein the antenna circuit is electrically connected to the battery through the rectifier circuit and the charge control circuit,

wherein the battery is discharged by turning on the switch in response to a voltage of the battery and supplying electrical power stored in the battery to the load portion through the discharge control circuit,

wherein charging of the battery is performed cumulatively, and

wherein the battery is configured to discharge at least 80 percent of the electrical power stored in the battery by discharging two times or less.

2. The wireless storage device according to claim 1, wherein an amount of electrical power charged to the battery per unit time is less than an amount of electrical power discharged from the battery per unit time.

3. The wireless power storage device according to claim 2, wherein the amount of electrical power discharged from the battery per unit time is twice as much or more than the amount of electrical power charged to the battery per unit time.

4. A wireless power storage device comprising:

an antenna circuit;

a rectifier circuit;

a battery;

a charge control circuit configured to control charging of the battery;

a discharge control circuit configured to control discharging of the battery wherein the discharge control circuit comprises a switch; and

a load portion electrically connected to the battery through the discharge control circuit,

wherein the antenna circuit is electrically connected to the battery through the rectifier circuit and the charge control circuit,

wherein the battery is discharged by turning on the switch in response to a voltage of the battery and supplying electrical power stored in the battery to the load portion through the discharge control circuit, and

wherein a period of time that the battery is charged for is longer than a period of time that the battery is discharged for.

5. The wireless power storage device according to claim 4, wherein an amount of electrical power charged to the battery per unit time is less than an amount of electrical power discharged from the battery per unit time.

6. The wireless power storage device according to claim 5, wherein the amount of electrical power discharged from the battery per unit time is twice as much or more than the amount of electrical power charged to the battery per unit time.

7. A wireless power storage device comprising:

an antenna circuit;

a rectifier circuit;

a battery;

a charge control circuit configured to control charging of the battery;

a discharge control circuit configured to control discharging of the battery wherein the discharge control circuit comprises a first switch;

a switching circuit comprising a second switch; and

a load portion electrically connected to the battery through the discharge control circuit and the switching circuit,

wherein the antenna circuit is electrically connected to the battery through the rectifier circuit and the charge control circuit,

wherein the battery is discharged by turning on the first switch in response to a voltage of the battery, turning on the second switch, and supplying electrical power stored in the battery to the load portion through the discharge control circuit and the switching circuit,

wherein charging of the battery is performed cumulatively, and

wherein the battery is configured to discharge at least 80 percent of the electrical power stored in the battery by discharging two times or less.

8. The wireless power storage device according to claim 7, wherein on and off of the second switch are controlled at a constant frequency.

9. The wireless power storage device according to claim 7, wherein an amount of electrical power charged to the battery per unit time is less than an amount of electrical power discharged from the battery per unit time.

10. The wireless power storage device according to claim 9, wherein the amount of electrical power discharged from the battery per unit time is twice as much or more than the amount of electrical power charged to the battery per unit time.

11. A wireless power storage device comprising:

an antenna circuit;

a rectifier circuit;

a battery;

a charge control circuit configured to control charging of the battery;

a discharge control circuit configured to control discharging of the battery wherein the discharge control circuit comprises a first switch;

a switching circuit comprising a second switch; and

a load portion electrically connected to the battery through the discharge control circuit and the switching circuit,

wherein the antenna circuit is electrically connected to the battery through the rectifier circuit and the charge control circuit,

wherein the battery is discharged by turning on the first switch in response to a voltage of the battery, turning on the second switch, and supplying electrical power stored in the battery to the load portion through the discharge control circuit and the switching circuit, and

wherein a period of time that the battery is charged for is longer than a period of time that the battery is discharged for.

12. The wireless power storage device according to claim 11, wherein on and off of the second switch are controlled at a constant frequency.

13. The wireless power storage device according to claim 11, wherein an amount of electrical power charged to the battery per unit time is less than an amount of electrical power discharged from the battery per unit time.

14. The wireless power storage device according to claim 13, wherein the amount of electrical power discharged from the battery per unit time is twice as much or more than the amount of electrical power charged to the battery per unit time.

15. A semiconductor device comprising:

an antenna circuit;

a power supply portion electrically connected to the antenna circuit wherein the power supply portion comprises;

a rectifier circuit;

a battery;

a charge control circuit configured to control charging of the battery; and

a discharge control circuit configured to control discharging of the battery wherein the discharge control circuit comprises a switch; and

a signal processing circuit for wireless communication through the antenna circuit wherein the signal processing circuit is electrically connected to the antenna circuit,

wherein the antenna circuit is electrically connected to the battery through the rectifier circuit and the charge control circuit,

wherein the battery is discharged by turning on the switch in response to a voltage of the battery and supplying electrical power stored in the battery to the signal processing circuit through the discharge control circuit,

wherein charging of the battery is performed cumulatively, and

wherein the battery is configured to discharge at least 80 percent of the electrical power stored in the battery by discharging two times or less.

16. The semiconductor device according to claim 15, wherein an amount of electrical power charged to the battery per unit time is less than an amount of electrical power discharged from the battery per unit time.

17. The semiconductor device according to claim 16, wherein the amount of electrical power discharged from the battery per unit time is twice as much or more than the amount of electrical power charged to the battery per unit time.

18. A semiconductor device comprising:

a first antenna circuit;

a second antenna circuit;

a power supply portion comprising;

a rectifier circuit;

a battery;

a charge control circuit configured to control charging of the battery; and

a discharge control circuit configured to control discharging of the battery wherein the discharge control circuit comprises a switch;

a signal processing circuit for wireless communication through the second antenna circuit wherein the signal processing circuit is electrically connected to the second antenna circuit; and

a sensor portion electrically connected to the power supply portion and the signal processing circuit,

wherein the sensor portion is electrically connected to the battery through the discharge control circuit,

wherein the first antenna circuit is electrically connected to the battery through the rectifier circuit and the charge control circuit,

wherein the battery is discharged by turning on the switch in response to a voltage of the battery and supplying electrical power stored in the battery to the sensor portion through the discharge control circuit,

wherein charging of the battery is performed cumulatively, and

wherein the battery is configured to discharge at least 80 percent of the electrical power stored in the battery by discharging two times or less.

19. The semiconductor device according to claim 18, wherein the first antenna circuit receives an electromagnetic wave having a different frequency to an electromagnetic wave which is received by the second antenna circuit.

20. The semiconductor device according to claim 18, wherein an amount of electrical power charged to the battery per unit time is less than an amount of electrical power discharged from the battery per unit time.

21. The semiconductor device according to claim 20, wherein the amount of electrical power discharged from the battery per unit time is twice as much or more than the amount of electrical power charged to the battery per unit time.

22. A method for operating a wireless power storage device which comprises:

an antenna circuit;

a rectifier circuit;

a charge control circuit;

a battery;

a discharge control circuit comprising a switch; and

a load portion electrically connected to the battery through the discharge control circuit,

the method comprising;

receiving an electromagnetic wave by the antenna circuit;

charging the battery with electrical power of the electromagnetic wave through the rectifier circuit and the charge control circuit; and

discharging the battery by supplying electrical power stored in the battery to the load portion through the discharge control circuit,

wherein charging of the battery is performed cumulatively,

wherein discharging of the battery is performed by turning on the switch in response to a voltage of the battery, and

wherein the battery is configured to discharge at least 80 percent of the electrical power stored in the battery by discharging two times or less.

23. The method for operating a wireless power storage device according to claim 22, wherein an amount of electrical power charged to the battery per unit time is less than an amount of electrical power discharged from the battery per unit time.

24. The method for operating a wireless power storage device according to claim 23, wherein the amount of electrical power discharged from the battery per unit time is twice as much or more than the amount of electrical power charged to the battery per unit time.