Non-contact power supplying appliance and non-contact power receiving appliance, and non-contact power transmitting system provided therewith

• US 10,340,744 B2
• Filed: 05/12/2016
• Issued: 07/02/2019
• Est. Priority Date: 05/19/2015
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: Tominaga, Hiroshi, Kurobe, Akio
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): Evans, James P
• Application Number:
  US15/503,042
• Publication Number:
  US 20170229922A1
• Time in Patent Office: 1,146 Days
• Field of Search: None
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• 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 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

Non-contact power supplying appliance includes a plurality of power supply units, communication unit that sends and receives a communication packet, and controller that controls the power supply units and the communication unit, in order to contactlessly transmit power to non-contact power receiving appliance. Communication unit sends a response-request message for placement detection, and thereafter receives a corresponding response message, so that communication unit completes placement detection of non-contact power receiving appliance. After sending a response-request message for identifying a placement location of the non-contact power receiving appliance, communication unit receives a corresponding response message, so that controller identifies a combination of non-contact power receiving appliance and some of power supply units. Controller controls power supply unit in accordance with a corresponding response message received by communication unit after communication unit sends a response-request message for power control. According to the present aspect, high-precision communication and safe power transmission become possible.

Claims

1. A non-contact power supplying appliance that contactlessly transmits power to a non-contact power receiving appliance having a load, the non-contact power supplying appliance comprising:

a plurality of power supply units that transmit the power;

a power-supply side communication unit that sends and receives a communication packet; and

a power-supply side controller that controls the power supply units and the power-supply side communication unit,

wherein the power-supply side communication unit completes placement detection of the non-contact power receiving appliance when the power-supply side communication unit sends a first response-request message for placement detection of the non-contact power receiving appliance, and thereafter receives a corresponding first response message including a magnitude of the power under reception by the non-contact power receiving appliance,

the power-supply side controller identifies a combination of the non-contact power receiving appliance and some of the power supply units when the power-supply side communication unit sends second and third response-request messages for identifying a placement location of the non-contact power receiving appliance and thereafter respectively receives corresponding second and third response messages including the magnitude of the power under reception by the non-contact power receiving appliance, and

the power-supply side controller is configured to control the some of the power supply units in accordance with a corresponding fourth response message that is received by the power-supply side communication unit and includes a difference between the magnitude of the power under reception by the non-contact power receiving appliance and rated power of the load after the power-supply side communication unit sends a fourth response-request message for power control.

2. The non-contact power supplying appliance according to claim 1, further comprising a storage unit that is controlled by the power-supply side controller and stores information communicated via the power-supply side communication unit,

wherein

the power supply units are arranged in a matrix shape, and

in order to identify a combination of the non-contact power receiving appliance and the some of the power supply units, the power-supply side controller is configured to execute, by controlling the power supply units, the power-supply side communication unit, and the storage unit,

(A) a process of carrying out power transmission by the power supply units of at least one row, and sending the second response-request message to the non-contact power receiving appliance of which the placement detection is completed,

(B) a process, after receiving the second response message corresponding to the second response-request message, of storing a communication address of the non-contact power receiving appliance and the magnitude of the power under reception by the non-contact power receiving appliance included in the second response message,

(C) a process of executing process (A) and process (B) to all rows, and identifying a row in which a magnitude of power under reception becomes largest,

(D) a process of carrying out power transmission by the power supply units of at least one column, and sending the third response-request message to the non-contact power receiving appliance of which the placement detection is completed,

(E) a process, after receiving the third response message corresponding to the third response-request message, of storing a communication address of the non-contact power receiving appliance and the magnitude of the power under reception by the non-contact power receiving appliance included in the third response message, and

(F) a process of executing process (D) and process (E) to all columns, and identifying a column in which the magnitude of the power under reception becomes largest.

3. The non-contact power supplying appliance according to claim 2, wherein the power-supply side controller is configured to exclude the non-contact power receiving appliance to which power is being supplied, from power transmission targets, when the power-supply side communication unit does not receive the fourth response message during a predetermined period from the non-contact power receiving appliance that is receiving power after the power-supply side communication unit sends the fourth response-request message to the non-contact power receiving appliance that is receiving power.

4. The non-contact power supplying appliance according to claim 3, wherein the power-supply side controller is configured to execute placement detection after excluding the non-contact power receiving appliance that is receiving power, from the power transmission targets.

5. The non-contact power supplying appliance according to claim 4, wherein the power-supply side controller is configured to register the non-contact power receiving appliance excluded from the power transmission targets, as one of the power transmission targets again, when the non-contact power receiving appliance is placed again.

6. A non-contact power receiving appliance that receives power contactlessly transmitted from a non-contact power supplying appliance, the non-contact power receiving appliance comprising:

a power receiving unit that receives the power;

a power-receiving side communication unit that sends and receives a communication packet;

a power measuring unit that measures the power under reception by the power receiving unit; and

a load,

wherein

upon receiving a first response-request message for placement detection of the non-contact power receiving appliance, the power-receiving side communication unit sends a corresponding first response message including a magnitude of the power measured by the power measuring unit,

upon receiving second and third response-request messages for identifying a placement location of the non-contact power receiving appliance, the power-receiving side communication unit respectively sends corresponding second and third response messages including the magnitude of the power measured by the power measuring unit, and

upon receiving a fourth response-request message for controlling the power transmitted, the power-receiving side communication unit sends a difference between the magnitude of the power measured by the power measuring unit and rated power of the load, as a fourth response message.

7. The non-contact power receiving appliance according to claim 6, further comprising:

a switching unit that is closed when the non-contact power receiving appliance is placed, and is opened when the power transmitted from the non-contact power supplying appliance is supplied to the load and the non-contact power receiving appliance is lifted, and stops the supply of the power to the load,

wherein

the power-receiving side communication unit is configured to send a response message indicating moving of the non-contact power receiving appliance, when the switching unit is opened.

8. A non-contact power transmitting system comprising:

a non-contact power supplying appliance that contactlessly transmits power to a non-contact power receiving appliance having a load; and

a non-contact power receiving appliance that receives power contactlessly transmitted from a non-contact power supplying appliance,

wherein

the non-contact power supplying appliance has a plurality of power supply units that transmit the power, a power-supply side communication unit that sends and receives a communication packet, and a power-supply side controller that controls the power supply units and the power-supply side communication unit,

wherein the power-supply side communication unit completes placement detection of the non-contact power receiving appliance when the power-supply side communication unit sends a first response-request message for placement detection of the non-contact power receiving appliance, and thereafter receives a corresponding first response message including a magnitude of the power under reception by the non-contact power receiving appliance,

the power-supply side controller identifies a combination of the non-contact power receiving appliance and some of the power supply units when the power-supply side communication unit sends second and third response-request messages for identifying a placement location of the non-contact power receiving appliance and thereafter respectively receives corresponding second and third response messages including the magnitude of the power under reception by the non-contact power receiving appliance, and

the power-supply side controller is configured to control the some of the power supply units in accordance with a corresponding fourth response message received by the power-supply side communication unit and includes a difference between the magnitude of the power under reception by the non-contact power receiving appliance and rated power of the load after the power-supply side communication unit sends a fourth response-request message for power control,

and wherein

the non-contact power receiving appliance has a power receiving unit that receives the power, a power-receiving side communication unit that sends and receives a communication packet, a power measuring unit that measures the power under reception by the power receiving unit, and a load,

wherein

upon receiving a first response-request message for placement detection of the non-contact power receiving appliance, the power-receiving side communication unit sends a corresponding first response message including a magnitude of the power measured by the power measuring unit,

upon receiving second and third response-request messages for identifying a placement location of the non-contact power receiving appliance, the power-receiving side communication unit respectively sends corresponding second and third response messages including the magnitude of the power measured by the power measuring unit, and

upon receiving a fourth response-request message for controlling the power transmitted, the power-receiving side communication unit sends a difference between the magnitude of the power measured by the power measuring unit and rated power of the load, as a fourth response message.

9. The non-contact power transmitting system according to claim 8, further comprising an adapter appliance that receives the power from the non-contact power supplying appliance and transmits the power to the non-contact power receiving appliance, and sends and receives the communication packet between the non-contact power supplying appliance and the non-contact power receiving appliance, wherein

the power-receiving side communication unit is a power-receiving communication unit that receives the power which is load-modulated to send and receive the communication packet,

the non-contact power supplying appliance further comprises a zero-cross detector that detects a zero-cross point of a commercial power source, and the power-supply side communication unit is configured to send a timing of the zero-cross point to the adapter appliance,

the adapter appliance includes a power-supply communication unit that contactlessly transmits power to the power-receiving communication unit and sends and receives the communication packet to and from the power-receiving communication unit, and an adapter-side communication unit that communicates with the power-supply side communication unit,

the power-supply side communication unit sends the zero-cross point timing to the adapter-side communication unit, and the power-supply communication unit transmits the power and sends and receives the communication packet in accordance with the zero-cross point, and

the power-supply side controller is configured to control, for power control, the power supply units in accordance with the communication packet received by the power-supply side communication unit.

10. The non-contact power transmitting system according to claim 9, wherein

the adapter appliance further has an adapter-side power receiving unit that receives the power contactlessly transmitted from the non-contact power supplying appliance,

the power-supply side controller is configured to identify a combination of the adapter-side power receiving unit and some of the power supply units, in order to identify a placement location of the non-contact power receiving appliance.