Contactless power transmission device and contactless power transmission/reception apparatus

• US 10,790,702 B2
• Filed: 04/20/2017
• Issued: 09/29/2020
• Est. Priority Date: 04/28/2016
• Status: Active Grant

• Current Assignee: Toshiba Tec Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Tec Corporation (Toshiba Corporation)
• Inventors: Kanagawa, Masahiro, Kato, Masakazu
• Primary Examiner(s): Barnie, Rexford N
• Assistant Examiner(s): Vu, Toan T
• Application Number:
  US15/492,210
• Publication Number:
  US 20170317532A1
• Time in Patent Office: 1,258 Days
• Field of Search: 307104, 320108, 320109
• CPC Class Codes: H01F 27/02 Casings
• CPC Class Codes: H01F 27/363 made of electrically conductive material
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0045 concerning the insertion or the connection of the batteries

Abstract

A contactless power transmission device transmits power to a power reception device in a contactless manner, and includes a shield case which has an opening portion at one end portion thereof, and is partitioned into a plurality of shield rooms by partitioning plates; a power transmission circuit which is for transmitting power and is disposed to correspond to each of the plurality of shield rooms; a plurality of power transmission coils which are disposed on the inner side in the plurality of shield rooms and transmit AC power from the power transmission circuit to the power reception device; and a notch which is formed on side surfaces of the shield case or the partitioning plates, from the opening portion toward the inner side such that both sides of a rear end portion of the power reception device inserted into the plurality of shield rooms can be held.

Claims

1. A contactless power transmission device which transmits power to a power reception device in a contactless manner, the contactless power transmission device comprising:

a shield case which has an opening portion at one end portion thereof, and is partitioned into a plurality of shield rooms by partitioning plates;

a power transmission circuit which is for transmitting power and is disposed to correspond to each of the plurality of shield rooms;

a plurality of power transmission coils which are disposed on the inner side in the plurality of shield rooms when viewed from the opening portion, and transmit AC power from the power transmission circuit to the power reception device; and

a notch which is formed on side surfaces of the shield case or the partitioning plates, from the opening portion toward the inner side such that both sides of a rear end portion of the power reception device inserted into the plurality of shield rooms is exposed through the notch and can be held at the rear end portion exposed through the notch, wherein the rear end portion of the power reception device is positioned further on an inner side of the opening portion than the shield case, and wherein protrusions are generated on an upper side and a lower side of the notch on the side surfaces of the shield case.

2. The device according to claim 1,

wherein the notch is formed in a curved shape at a central portion of the side surfaces of the shield case or the partitioning plates, from the opening portion toward the inner side.

3. The device according to claim 1,

wherein power transmission coils of the plurality of power transmission coils are disposed on an respective inner-side surfaces of the plurality of shield rooms, which face the opening portion, so as to be orthogonal to or parallel with an insertion direction of the power reception device.

4. The device according to claim 1,

wherein the power transmission circuit disposed in each of the plurality of shield rooms is operated based on a clock signal, and clock signals supplied to adjacent power transmission circuits are synchronized with each other with the phases thereof being inverted.

5. A contactless power transmission/reception apparatus comprising:

a power reception device; and

a power transmission device which transmits power to the power reception device in a contactless manner,

wherein the power transmission device includes

a shield case which has an opening portion at one end portion thereof, and is partitioned into a plurality of shield rooms by partitioning plates,

a power transmission circuit which is for transmitting power and is disposed to correspond to each of the plurality of shield rooms,

a plurality of power transmission coils which are disposed on the inner side in the plurality of shield rooms when viewed from the opening portion, and transmit AC power from the power transmission circuit to the power reception device, and

a notch which is formed on side surfaces of the shield case or the partitioning plates, from the opening portion toward the inner side such that both sides of a rear end portion of the power reception device inserted into the plurality of shield rooms is exposed at the notch and can be held at the rear end portion exposed at the notch, wherein the rear end portion of the power reception device is positioned further on an inner side of the opening portion than the shield case, and wherein protrusions are generated on an upper side and a lower side of the notch on the side surfaces of the shield case, and

wherein the power reception device includes

a housing which can be accommodated in any of the plurality of shield rooms,

a power reception coil which is disposed in the housing so as to face the plurality of power transmission coils when the housing is accommodated in the shield case, and receives the AC power transmitted from the plurality of power transmission coils in a contactless manner, and

a power reception circuit which is provided in the housing, and converts the AC power received by the power reception coil to DC power.