Electric power charge and discharge system

• US 9,831,707 B2
• Filed: 03/13/2014
• Issued: 11/28/2017
• Est. Priority Date: 10/31/2006
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Nagatsuka, Shuhei, Kimura, Akihiro
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US14/208,844
• Publication Number:
  US 20140191719A1
• Time in Patent Office: 1,356 Days
• Field of Search: 320108
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/27 characterised by the type of receiving antennas, e.g. rectennas
• 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 7/0025 Sequential battery discharge in systems with a plurality of batteries
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H04B 1/3883 Arrangements for mounting batteries or battery chargers
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

An electric power charge and discharge system for an electronic device having a battery, by which the electronic device can be used for a long period of time. In a wireless communication device including a wireless driving portion including a first battery and a wireless charging portion including a second battery, the first battery is charged by electric power from a fixed power supply and the second battery is charged by using electromagnetic waves existing in an external space. Further, the first battery and the second battery are discharged alternately, and during a period in which the first battery is discharged, the second battery is charged.

Claims

1. A device comprising:

an antenna;

a wireless charge controlling circuit electrically connected to the antenna;

a first battery electrically connected to the wireless charge controlling circuit;

a connector electrically connected to the first battery; and

an inner circuit electrically connected to the first battery,

wherein the wireless charge controlling circuit is configured to transform a wireless electric power received by the antenna into a voltage capable of charging the first battery,

wherein the first battery is configured to be charged by electric power from the antenna, and

wherein the connector is configured to supply electric power from an external power supply through a cable.

2. The device according to claim 1, further comprising a second battery electrically connected to the connector.

3. The device according to claim 1, wherein the inner circuit is electrically connected to the antenna.

4. The device according to claim 1, wherein the first battery is configured to be charged by the electric power from the external power supply through the cable.

5. The device according to claim 1, further comprising a charge switching circuit electrically connected to the wireless charge controlling circuit, the first battery, and the connector.

6. The device according to claim 1, further comprising a power supply switching circuit electrically connected to the first battery.

7. The device according to claim 1, wherein the first battery is any one of a lithium battery, a lithium polymer battery, and a lithium ion battery.

8. A device comprising:

an antenna;

a wireless charge controlling circuit electrically connected to the antenna;

a first battery electrically connected to the wireless charge controlling circuit; and

a connector electrically connected to the first battery,

wherein the wireless charge controlling circuit is configured to transform a wireless electric power received by the antenna into a voltage capable of charging the first battery,

wherein the first battery is configured to be charged by electric power from the antenna, and

wherein the connector is configured to supply electric power from an external power supply through a cable.

9. The device according to claim 8, further comprising a second battery electrically connected to the connector.

10. The device according to claim 8, wherein the first battery is configured to be charged by the electric power from the external power supply through the cable.

11. The device according to claim 8, further comprising a charge switching circuit electrically connected to the wireless charge controlling circuit, the first battery, and the connector.

12. The device according to claim 8, further comprising a power supply switching circuit electrically connected to the first battery.

13. The device according to claim 8, wherein the first battery is any one of a lithium battery, a lithium polymer battery, and a lithium ion battery.