POWER RECEIVING APPARATUS, METHOD FOR CONTROLLING POWER RECEIVING APPARATUS, AND STORAGE MEDIUM

• US 20170207649A1
• Filed: 04/03/2017
• Published: 07/20/2017
• 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
• Granted Patent: US 10,601,262 B2
• Time in Patent Office: 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 communication unit configured to perform wireless communication to control wireless power transmission from the power transmission apparatus to the power receiving unit; and

a changing unit configured to change a way of supplying power to the communication unit from a first way that power, which is received by the power receiving unit and is not stored in a battery, is supplied to the communication unit to a second way that power stored in the battery is supplied to the communication unit,

wherein before the way of supplying power to the communication unit is changed by the changing unit, the communication unit transmits, to the power transmission apparatus, a notification regarding termination of a connection used for communication for the wireless power transmission, and

wherein after the way of supplying power to the communication unit is changed by the changing unit, the communication unit performs communication to establish a new connection used for communication for the wireless power transmission.

2. The power receiving apparatus according to claim 1, further comprising:

a determination unit configured to determine that the way of supplying power to the communication unit is to be changed from the first way to the second way,

wherein the changing unit changes, according to determination by the determination unit, the way of supplying power to the communication unit, and

wherein in a case where the determination unit determines that the way of supplying power to the communication unit is to be changed, the communication unit transmits the notification before the way of supplying power to the communication unit is changed by the changing unit.

3. The power receiving apparatus according to claim 2,

wherein the determination unit determines, based on an amount of power stored in the battery, that the way of supplying power to the communication unit is to be changed.

4. The power receiving apparatus according to claim 3,

wherein the determination unit determines, in a case where the amount of power stored in the battery has increased from an amount less than a predetermined amount of power to an amount greater than the predetermined amount of power, that the way of supplying power to the communication unit is to be changed.

5. The power receiving apparatus according to claim 4,

wherein the predetermined amount of power is greater than or equal to a minimum amount of power by which the communication unit can perform communication for the wireless power transmission.

6. The power receiving apparatus according to claim 4,

wherein the predetermined amount of power is greater than or equal to a minimum amount of power by which a predetermined application can operate.

7. The power receiving apparatus according to claim 2,

wherein the determination unit determines, based on a voltage of the battery, that the way of supplying power to the communication unit is to be changed.

8. The power receiving apparatus according to claim 2,

wherein the determination unit determines, in a case where a predetermined application starts to operate in the power receiving apparatus, that the way of supplying power to the communication unit is to be changed.

9. The power receiving apparatus according to claim 8,

wherein the predetermined application uses the communication unit to perform communication which is not for the wireless power transmission.

10. The power receiving apparatus according to claim 1,

wherein in the second way, power which is received by the power receiving unit and is stored in the battery is supplied to the communication unit.

11. The power receiving apparatus according to claim 1,

wherein the communication unit transmits the notification for reducing an amount of power transmitted from the power transmission apparatus to the power receiving unit.

12. The power receiving apparatus according to claim 1,

wherein the connection used for communication for the wireless power transmission is a connection of Bluetooth Low Energy.

13. The power receiving apparatus according to claim 12,

wherein the communication unit performs the communication to establish the new connection by transmitting an advertising packet.

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

receiving power wirelessly transmitted by a power transmission apparatus;

transmitting wirelessly, to the power transmission apparatus, a notification regarding termination of a connection used for communication for wireless power transmission from the power transmission apparatus to the power receiving apparatus;

changing, after the transmitting, a way of supplying power to a communication unit performing wireless communication to control the wireless power transmission from a first way that power, which is received in the receiving and is not stored in a battery, is supplied to the communication unit to a second way that power stored in the battery is supplied to the communication unit; and

performing, after the changing, wireless communication to establish a new connection used for communication for the wireless power transmission.

15. The control method according to claim 14, further comprising:

determining that the way of supplying power to the communication unit is to be changed from the first way to the second way,

wherein in the transmitting, the notification is transmitted in a case where determination that the way of supplying power to the communication unit is to be changed is made in the determining, and

wherein in the changing, the way of supplying power to the communication unit is changed according to the determination in the determining.

16. The control method according to claim 15,

wherein in the determining, the determination that the way of supplying power to the communication unit is to be changed is made based on an amount of power stored in the battery.

17. 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;

transmitting wirelessly, to the power transmission apparatus, a notification regarding termination of a connection used for communication for wireless power transmission from the power transmission apparatus to the power receiving apparatus;

changing, after the transmitting, a way of supplying power to a communication unit performing wireless communication to control the wireless power transmission from a first way that power, which is received in the receiving and is not stored in a battery, is supplied to the communication unit to a second way that power stored in the battery is supplied to the communication unit; and

performing, after the changing, wireless communication to establish a new connection used for communication for the wireless power transmission.