POWER-SUPPLYING DEVICE, CONTROL METHOD FOR THE SAME, AND POWER-SUPPLYING SYSTEM

• US 20110260532A1
• Filed: 05/07/2010
• Published: 10/27/2011
• Est. Priority Date: 05/13/2009
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Tanabe, Akihiro
• Granted Patent: US 8,680,715 B2
• Time in Patent Office: Days
• US Class Current: 307/17
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• 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 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/00302 Overcharge protection
• CPC Class Codes: H02J 7/0049 Detection of fully charged condition
• CPC Class Codes: H02J 7/007 Regulation of charging or discharging current or voltage
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Even when power is to be simultaneously supplied to a plurality of power-supplied devices by using one primary coil, it is possible to properly supply power to the respective power-supplied devices. More specifically, a power-supplying device stops non-contact power supply in accordance with the detection of a plurality of power-supplied devices set in a power supply area.

Claims

1. A power-supplying device including a plurality of primary coils comprising:

power supply means for supplying power in a non-contact manner from each of the plurality of primary coils to at least one power-supplied device set in a power supply area of each of the plurality of primary coils;

detecting means for detecting whether a plurality of power-supplied devices are set in the power supply area of one of the plurality of primary coils; and

controlling means for controlling the power supply means to stop supplying power from the one of the plurality of primary coils on which the plurality of power-supplied devices are detected to be set, when the detecting means detects that the plurality of power-supplied devices are set in the power supply area of the one of the plurality of primary coils.

2. The device according to claim 1, further comprising communication means for obtaining allowability information associated with power supplied to the at least one power-supplied device by communicating with the at least one power-supplied device set in the power supply area of each of the plurality of primary coils,

wherein the controlling means controls the power supply means to supply power from the plurality of primary coils, other than the one of the plurality of primary coils on which the plurality of power-supplied devices are detected to be set, to each of the plurality of power-supplied devices based on the allowability information obtained by the communication means.

3. The device according to claim 2,

wherein the controlling means determines whether power supplied by the power supply means to each of the plurality of power-supplied devices set on the primary coil falls within an allowable range of voltage and current determined based on the allowability information, when the power supply means is stopped supplying power from the one of the plurality of primary coils on which the plurality of power-supplied devices are detected to be set, and

the controlling means controls the power supply means to resume supplying power from the one of the plurality of primary coils, when determining that the power supplied to each of the plurality of power-supplied devices set on the one of the plurality of primary coils falls outside the allowable range.

4. The device according to claim 3, further comprising alert means for issuing an alert when the power supplied to each of the plurality of power-supplied devices falls outside the allowable range determined based on the allowability information.

5. A control method for a power-supplying device comprising power supply means, including a plurality of primary coils, for supplying power in a non-contact manner from each of the plurality of primary coils to at least one power-supplied device set in a power supply area of each of the plurality of primary coils, characterized by comprising:

a detecting step of detecting whether a plurality of power-supplied devices are set in the power supply area of one of the plurality of primary coils; and

a controlling step of controlling the power supply means to stop supplying power from the one of the plurality of primary coils on which the plurality of power-supplied devices are detected to be set, when it is detected in the detection step that the plurality of power-supplied devices are set in the power supply area of the one of the plurality of primary coils.

6. The method according to claim 5, characterized by further comprising a communication step of obtaining allowability information associated with power supplied to the at least one power-supplied device by communicating with the at least one power-supplied device set in the power supply area of each of the plurality of primary coils,

wherein in the controlling step, the power supply means is controlled to supply power from the plurality of primary coils, other than the one of the plurality of primary coils on which the plurality of power-supplied devices are detected to be set, to each of the plurality of power-supplied devices based on the allowability information obtained in the communication step.

7. The method according to claim 6, characterized in that in the controlling step, it is determined whether power supplied by the power supply means to each of the plurality of power-supplied devices set on the primary coil falls within an allowable range of a voltage and current determined based on the allowability information, when the power supply means is stopped supplying power from the one of the plurality of primary coils on which the plurality of power-supplied devices are detected to be set, and

the power supply means is controlled to resume supplying power from the one of the plurality of primary coils, when it is determined that the power supplied to each of the plurality of power-supplied devices set on the one of the plurality of primary coils falls outside the allowable range.

8. The method according to claim 7, characterized by further comprising an alert step of issuing an alert when the power supplied to each of the plurality of power-supplied devices falls outside the allowable range determined based on the allowability information.

9. A power-supplying system comprising a power-supplying device and at least one power-supplied device, characterized in that

the power-supplying device comprises

a plurality of primary coils,

power supply means for supplying power in a non-contact manner from each of the plurality of primary coils to the at least one power-supplied device set in a power supply area of each of the plurality of primary coils,

detecting means for detecting whether a plurality of power-supplied devices are set in the power supply area of one of the plurality of primary coils, and

controlling means for controlling the power supply means to stop supplying power from the one of the plurality of primary coils on which the plurality of power-supplied devices are detected to be set, when the detecting means detects that the plurality of power-supplied devices are set in the power supply area of the one of the plurality of primary coils, and

the at least one power-supplied device each comprises power receiving means including a secondary coil which receives power supplied from the power supply means when the power-supplied device is set on any of the plurality of primary coils.