CONTROL DEVICE, ELECTRONIC APPARATUS, AND CONTACTLESS POWER TRANSMISSION SYSTEM

• US 20160336774A1
• Filed: 05/09/2016
• Published: 11/17/2016
• Est. Priority Date: 05/13/2015
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: ONISHI, Kota
• Granted Patent: US 10,811,894 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/12 of the resonant type
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

A control device on a power receiving side includes a charging portion that charges a battery based on power that is received by a power receiving portion that receives power from a power transmitting device, a control portion 54 that performs charging control, and a nonvolatile memory. The nonvolatile memory stores status information of the battery, and the control portion performs charging control based on the status information stored in the nonvolatile memory.

Claims

1. A control device of a power receiving device that receives power from a power transmitting device contactlessly, the control device comprising:

a charging portion that charges a battery based on power in which a power receiving portion receives from the power transmitting device;

a control portion that performs charging control; and

a nonvolatile memory,

wherein the nonvolatile memory stores status information of the battery, and

the control portion performs the charging control based on the status information stored in the nonvolatile memory.

2. The control device according to claim 1, wherein the nonvolatile memory stores temperature abnormality detection information as the status information.

3. The control device according to claim 2, further comprising a load modulation portion that transmits communication data to the power transmitting device by load modulation,

wherein the load modulation portion, in a case where abnormal temperature is detected, transmits the temperature abnormality detection information to the power transmitting device by the load modulation.

4. The control device according to claim 2, wherein the nonvolatile memory stores number of charging times information representing the number of charging times of the battery as the status information.

5. The control device according to claim 4,

wherein the control portion

does not update the number of charging times information in the nonvolatile memory in a case where the temperature abnormality detection information is stored in the nonvolatile memory, and

updates the number of charging times information in the nonvolatile memory in a case where the temperature abnormality detection information is not stored in the nonvolatile memory.

6. The control device according to claim 4, wherein the nonvolatile memory stores a battery voltage when abnormal temperature is detected as the status information.

7. The control device according to claim 6, wherein even in a case where the temperature abnormality detection information is stored in the nonvolatile memory, in a case where the battery voltage has decreased from the battery voltage stored in the nonvolatile memory by a predetermined voltage, the control portion updates the number of charging times information in the nonvolatile memory.

8. The control device according to claim 1, wherein when the status information is stored in the nonvolatile memory, the control portion, after having written the status information to a first address, writes the status information to a second address that is different from the first address after a given period has elapsed.

9. The control device according to claim 1, wherein the nonvolatile memory operates with a power supply voltage based on an output voltage of the power receiving portion.

10. The control device according to claim 1, wherein the nonvolatile memory stores charging control information of the battery.

12. An electronic apparatus comprising the control device according to claim 1.

11. A control device on a power transmitting side in a contactless power transmission system including a power transmitting device and a power receiving device, the control device comprising:

a driver control circuit that controls a power transmission driver in a power transmission portion that transmits power to the power receiving device;

a control portion that controls the driver control circuit; and

a communication portion that performs communication processing with the power receiving device that transmits communication data by load modulation,

wherein the control portion, in a case of receiving communication data including temperature abnormality detection information from the power receiving device, causes the power transmission portion to perform intermittent power transmission.

13. A contactless power transmission system including a power transmitting device and a power receiving device,

wherein the power transmitting device transmits power to the power receiving device, and performs communication processing with the power receiving device that transmits communication data by load modulation,

the power receiving device includes a nonvolatile memory that stores status information of a battery, charges the battery based on the power received from the power transmitting device and the status information stored in the nonvolatile memory, and transmits communication data to the power transmitting device by the load modulation,

the power receiving device, in a case where abnormal temperature is detected, stores temperature abnormality detection information in the nonvolatile memory as the status information, and transmits the temperature abnormality detection information to the power transmitting device by the load modulation, and

the power transmitting device, in a case where the communication data including the temperature abnormality detection information is received from the power receiving device, transmits power to the power receiving device by intermittent power transmission.