Power receiving apparatus, method for controlling power receiving apparatus, and storage medium

• US 9,641,018 B2
• Filed: 08/01/2014
• Issued: 05/02/2017
• Est. Priority Date: 08/05/2013
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Shichino, Takahiro
• Primary Examiner(s): Siek, Vuthe
• Application Number:
  US14/450,084
• Publication Number:
  US 20150035480A1
• Time in Patent Office: 1,005 Days
• CPC Class Codes: H02J 2207/40 adapted for charging from various sources, e.g. AC, DC or multivoltage
• 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 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00041 in response to measured battery parameters, e.g. voltage, current or temperature profile
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries
• CPC Class Codes: H02J 7/0024 Parallel/serial switching of connection of batteries to charge or load circuit
• CPC Class Codes: H02J 7/0036 using connection detecting circuits H02J7/0034 takes precedence
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/00718 in response to charge current gradient
• CPC Class Codes: H02J 7/007184 in response to battery voltage gradient

Abstract

A power receiving apparatus receives power wirelessly transmitted by a power transmission apparatus, and stores the received power. The power receiving apparatus includes a communication unit configured to transmit and receive a control signal in a wireless power transmission system. The power receiving apparatus switches a supply source of power to the communication unit when a power storage capacity is less than a threshold value.

Claims

1. A power receiving apparatus comprising:

a power receiving unit configured to receive power wirelessly transmitted by a power transmission apparatus;

a power storage unit configured to store the power received by the power receiving unit;

a communication unit configured to perform communication for wireless power transmission from the power transmission apparatus to the power receiving apparatus;

a determination unit configured to determine a supply source of power to be used for the communication for wireless power transmission performed by the communication unit so that, the supply source is the power transmission apparatus in a case where an amount of power stored in the power storage unit is less than a predetermined amount of power by which the communication unit can perform the communication for wireless power transmission, and the supply source is the power storage unit in a case where the amount of stored power is equal to or greater than the predetermined amount of power; and

a control unit configured to perform control so that the power used for the communication performed by the communication unit is supplied by the supply source determined by the determination unit.

2. The power receiving apparatus according to claim 1, further comprising an execution unit configured to execute an application to operate with power stored by the power storage unit.

3. The power receiving apparatus according to claim 2,

wherein the control unit performs control so that supply of power used for the communication performed by the communication unit is stopped according to the amount of power stored in the power storage unit and a state of the application to be executed by the execution unit.

4. The power receiving apparatus according to claim 3, wherein the communication unit is used in the application.

5. The power receiving apparatus according to claim 1,

wherein the control unit performs control so that the power wirelessly transmitted by the power transmission apparatus is supplied to the communication unit through the power receiving unit in a case where the determination unit designates the power transmission apparatus as the supply source.

6. The power receiving apparatus according to claim 5,

wherein the determination unit changes the supply source from the power transmission apparatus to the power storage unit in a case where the amount of power stored in the power storage unit becomes equal to or greater than the predetermined amount of power, and

wherein the control unit performs control so that, in a case where the determination unit changes the supply source from the power transmission apparatus to the power storage unit, the power stored in the power storage unit is supplied to the communication unit after the power supply from the power transmission apparatus to the communication unit through the power receiving unit is stopped.

7. The power receiving apparatus according to claim 6, wherein the communication unit performs communication for stopping the wireless power transmission from the power transmission apparatus to the power receiving apparatus in a case where the amount of power stored in the power storage unit becomes equal to or greater than the predetermined amount of power, and performs communication for resuming the wireless power transmission from the power transmission apparatus to the power receiving apparatus, based on the control unit performing control so that the power stored in the power storage unit is supplied to the communication unit.

8. The power receiving apparatus according to claim 5,

wherein, in a case where the amount of power stored in the power storage unit is less than the predetermined amount of power, the communication unit performs communication for notifying the power transmission apparatus of an amount of power requested to be supplied from the power transmission apparatus using the power supplied from the transmission apparatus to the communication unit through the power receiving apparatus,

wherein the power receiving unit receives the amount of power requested to be supplied, and

wherein the power storage unit stores the amount of power, received by the power receiving unit, requested to be supplied.

9. A control method for controlling a power receiving apparatus, the method comprising:

receiving, at the power receiving apparatus, power wirelessly transmitted by a power transmission apparatus;

storing the received power in a power storage unit;

performing communication for wireless power transmission from the power transmission apparatus to the power receiving apparatus;

determining, at the power receiving apparatus, a supply source of power to be used for the communication for wireless power transmission so that, the supply source is the power transmission apparatus in a case where an amount of power stored in the power storage unit is less than a predetermined amount of power by which the communication unit can perform the communication for wireless power transmission, and the supply source is the power storage unit in a case where the amount of stored power is equal to or greater than the predetermined amount of power; and

performing control, at the power receiving apparatus, so that the power used for the communication is supplied by the determined supply source.

10. The power receiving method according to claim 9,

wherein, in the controlling, control is performed so that the power wirelessly transmitted by the power transmission apparatus is supplied for the communication through the receiving of power wirelessly transmitted by the power transmission apparatus, in a case where the power transmission apparatus is designated as the supply source in the determining.

11. A non-transitory computer readable storage medium storing computer executable instructions for causing a computer to execute a method, the method comprising:

receiving power wirelessly transmitted by a power transmission apparatus;

storing the received power in a power storage unit;

performing communication for wireless power transmission from the power transmission apparatus to the power receiving apparatus;

determining a supply source of power to be used for the communication for wireless power transmission so that, the supply source is the power transmission apparatus in a case where an amount of power stored in the power storage unit is less than a predetermined amount of power by which the communication unit can perform the communication for wireless power transmission, and the supply source is the power storage unit in a case where the amount of stored power is equal to or greater than the predetermined amount of power; and

controlling so that the power used for the communication is supplied by the determined supply source.