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

• US 10,601,262 B2
• Filed: 04/03/2017
• Issued: 03/24/2020
• 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:
  US15/477,838
• Publication Number:
  US 20170207649A1
• Time in Patent Office: 1,086 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 battery configured to store at least a part of power received by the power receiving unit;

a communication unit configured to perform wireless communication for controlling wireless power transmission from the power transmission apparatus to the power receiving unit by using either—

power received by the power receiving unit and not stored in the battery or power stored in the battery; and

a switching unit configured to switch a state in which the communication unit performs wireless communication between a first state in which the communication unit performs wireless communication using power received by the power receiving unit and not stored in the battery and a second state in which the communication unit performs wireless communication using power stored in the battery, based on an amount of power stored in the battery and a threshold.

2. The power receiving apparatus according to claim 1,

wherein the power stored in the battery is power which is received by the power receiving unit and is stored in the battery.

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

a determination unit configured to determine that the state in which the communication unit performs wireless communication is to be switched,

wherein the switching unit switches, according to determination by the determination unit, the state in which the communication unit performs wireless communication.

4. The power receiving apparatus according to claim 1,

wherein the switching unit switches the state so that the communication unit performs wireless communication using power received by the power receiving unit and not stored in the battery before the battery starts to store power, and the communication unit performs wireless communication using power stored in the battery after the battery starts to store power.

5. A power receiving apparatus comprising:

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

a battery configured to store at least a part of power received by the power receiving unit;

a communication unit configured to perform wireless communication for controlling wireless power transmission from the power transmission apparatus to the power receiving unit by using either power received by the power receiving unit and not stored in the battery or power stored in the battery; and

a switching unit configured to switch a state in which the communication unit performs wireless communication between a first state in which the communication unit performs wireless communication using power received by the power receiving unit and not stored in the battery and a second state in which the communication unit performs wireless communication using power stored in the battery, based on an amount of power stored in the battery and an amount of power by which the communication unit can perform wireless communication for the wireless power transmission.

6. A power receiving apparatus comprising:

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

a battery configured to store at least a part of power received by the power receiving unit;

a communication unit configured to perform wireless communication for controlling wireless power transmission from the power transmission apparatus to the power receiving unit by using either power received by the power receiving unit and not stored in the battery or power stored in the battery; and

a switching unit configured to switch a state in which the communication unit performs wireless communication between a first state in which the communication unit performs wireless communication using power received by the power receiving unit and not stored in the battery and a second state in which the communication unit performs wireless communication using power stored in the battery, based on an amount of power stored in the battery and an amount of power by which a predetermined application can operate.

7. A power receiving apparatus comprising:

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

a battery configured to store at least a part of power received by the power receiving unit;

a communication unit configured to perform wireless communication for controlling wireless power transmission from the power transmission apparatus to the power receiving unit by using either power received by the power receiving unit and not stored in the battery or power stored in the battery;

a switching unit configured to switch a state in which the communication unit performs wireless communication between a first state in which the communication unit performs wireless communication using power received by the power receiving unit and not stored in the battery and a second state in which the communication unit performs wireless communication using power stored in the battery, and

a determination unit configured to determine that the state in which the communication unit performs wireless communication is to be switched,

wherein the determination unit determines, in a case where a predetermined application starts to operate in the power receiving apparatus, that the state in which the communication unit performs wireless communication is to be switched, and

wherein the switching unit switches, according to determination by the determination unit, the state in which the communication unit performs wireless communication.

8. The power receiving apparatus according to claim 7,

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

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

receiving power wirelessly transmitted by a power transmission apparatus;

switching a state in which a communication unit in the power receiving apparatus performs wireless communication to control power between a first state in which the communication unit performs wireless communication using power received in the receiving and not stored in a battery and a second state in which the communication unit performs wireless communication using power stored in the battery, based on an amount of power stored in the battery and a threshold; and

performing wireless communication for controlling wireless power transmission from the power transmission apparatus by using either power received in the receiving and not stored in the battery or power stored in the battery.

10. 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;

switching a state in which a communication unit in the power receiving apparatus performs wireless communication to control power between a first state in which the communication unit performs wireless communication using power received in the receiving and not stored in a battery and a second state in which the communication unit performs wireless communication using power stored in the battery, based on an amount of power stored in the battery and a threshold; and

performing wireless communication for controlling wireless power transmission from the power transmission apparatus by using either power received in the receiving and not stored in the battery or power stored in the battery.

11. A power receiving apparatus comprising:

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

a battery configured to store at least a part of power received by the power receiving unit;

a communication unit configured to perform wireless communication for controlling wireless power transmission from the power transmission apparatus to the power receiving unit by using either power received by the power receiving unit and not stored in the battery or power stored in the battery;

a switching unit configured to switch a state in which the communication unit performs wireless communication between a first state in which the communication unit performs wireless communication using power received by the power receiving unit and not stored in the battery and a second state in which the communication unit performs wireless communication using power stored in the battery, and

a determination unit configured to determine that the state in which the communication unit performs wireless communication is to be switched from the first state in which the communication unit performs wireless communication using power received by the power receiving unit and not stored in a battery to the second state in which the communication unit performs wireless communication using power stored in the battery,

wherein the switching unit switches, according to determination by the determination unit, the state in which the communication unit performs wireless communication, and

wherein in a case where the determination unit determines that the state in which the communication unit performs wireless communication is to be switched, the communication unit transmits a notification regarding termination of a connection used for wireless communication for the wireless power transmission, before the state in which the communication unit performs wireless communication is switched by the switching unit.

12. The power receiving apparatus according to claim 11,

wherein the determination unit determines, based on an amount of power stored in the battery, that the state in which the communication unit performs wireless communication is to be switched.

13. A power receiving apparatus comprising:

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

a battery configured to store at least a part of power received by the power receiving unit;

a communication unit configured to perform wireless communication for controlling wireless power transmission from the power transmission apparatus to the power receiving unit by using either power received by the power receiving unit and not stored in the battery or power stored in the battery; and

a switching unit configured to switch a state in which the communication unit performs wireless communication between a first state in which the communication unit performs wireless communication using power received by the power receiving unit and not stored in the battery and a second state in which the communication unit performs wireless communication using power stored in the battery,

wherein before the state in which the communication unit performs wireless communication is switched by the switching unit, the communication unit transmits, to the power transmission apparatus, a notification regarding termination of a connection used for wireless communication for the wireless power transmission, and

wherein after the state in which the communication unit performs wireless communication is switched by the switching unit, the communication unit performs wireless communication to establish a new connection used for wireless communication for the wireless power transmission.

14. The power receiving apparatus according to claim 13,

wherein the switching unit switches the state in which the communication unit performs wireless communication, by switching a supply path for supplying power to the communication unit between a first supply path for supplying power received by the power receiving unit and not stored in the battery to the communication unit and a second supply path for supplying power stored in the battery to the communication unit.

15. The power receiving apparatus according to claim 13, further comprising:

a determination unit configured to determine that the state in which the communication unit performs wireless communication is to be switched,

wherein the switching unit switches, according to determination by the determination unit, the state in which the communication unit performs wireless communication, and

wherein in a case where the determination unit determines that the state in which the communication unit performs the wireless communication is to be switched, the communication unit transmits the notification before the state in which the communication unit performs wireless communication is switched by the switching unit.

16. The power receiving apparatus according to claim 15,

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 state in which the communication unit performs wireless communication is to be switched.

17. The power receiving apparatus according to claim 13,

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

18. The power receiving apparatus according to claim 17,

wherein the communication unit performs wireless communication to establish the new connection by transmitting an advertising packet defined in a standard of Bluetooth Low Energy.

19. A power receiving apparatus comprising:

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

a battery configured to store at least a part of power received by the power receiving unit;

a communication unit configured to perform wireless communication for controlling wireless power transmission from the power transmission apparatus to the power receiving unit by using either power received by the power receiving unit and not stored in the battery or power stored in the battery; and

a switching unit configured to switch a state in which the communication unit performs wireless communication between a first state in which the communication unit performs wireless communication using power received by the power receiving unit and not stored in the battery and a second state in which the communication unit performs wireless communication using power stored in the battery,

wherein the communication unit is further configured to perform wireless communication with an apparatus different from the power transmission apparatus.

20. A power receiving apparatus comprising:

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

a battery configured to store at least a part of power received by the power receiving unit;

a communication unit configured to perform wireless communication for controlling wireless power transmission from the power transmission apparatus to the power receiving unit by using either power received by the power receiving unit and not stored in the battery or power stored in the battery; and

a switching unit configured to switch a state in which the communication unit performs wireless communication between a first state in which the communication unit performs wireless communication using power received by the power receiving unit and not stored in the battery and a second state in which the communication unit performs wireless communication using power stored in the battery,

wherein the communication unit performs wireless communication by using power stored in the battery, in a case where an application other than wireless power transmission operate.

21. The power receiving apparatus according to claim 20,

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