VEHICULAR POWER TRANSMISSION DEVICE

• US 20140008969A1
• Filed: 07/01/2013
• Published: 01/09/2014
• Est. Priority Date: 07/04/2012
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Kanahara, Hirokazu, Arie, Shinichi, Mishio, Yoshihiro, Kanasugi, Katsumi
• Granted Patent: US 9,000,622 B2
• Time in Patent Office: Days
• US Class Current: 307/9.1
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 15/04 the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A vehicular power transmission device includes a power transmission unit which transmits electromagnetic waves to a mobile device to transmit power to a power reception unit of the mobile device, and a frequency changing unit which, when it is determined based on the transmission frequency of the electromagnetic waves to be transmitted from the power transmission unit to the mobile device and a reception frequency of a radio receiver that radio noise is generated by the power transmission unit, changes the transmission frequency of the electromagnetic waves of the power transmission unit, wherein the power transmission unit changes a transmission power of the electromagnetic waves based on an amount of change in the transmission frequency of the electromagnetic waves changed by the frequency changing unit.

Claims

1. A vehicular power transmission device comprising:

a power transmission unit which is provided in a vehicle and transmits electromagnetic waves to a mobile device to transmit power to a power reception unit of the mobile device; and

a frequency changing unit which, when it is determined based on a transmission frequency of the electromagnetic waves to be transmitted from the power transmission unit to the mobile device and a reception frequency of a radio receiver that radio noise is caused by the power transmission unit, changes the transmission frequency of the electromagnetic waves of the power transmission unit,

wherein the power transmission unit changes a transmission power of the electromagnetic waves based on an amount of change in the transmission frequency of the electromagnetic waves changed by the frequency changing unit.

2. The vehicular power transmission device according to claim 1,

wherein the power transmission unit increases the transmission power of the electromagnetic waves in accordance with the amount of change in the transmission frequency of the electromagnetic waves changed by the frequency changing unit.

3. The vehicular power transmission device according to claim 2,

wherein the power transmission unit stores information regarding a transmission characteristic according to the transmission frequency of the electromagnetic waves in advance, and increases the transmission power of the electromagnetic waves so as to make reception power received by the power reception unit substantially equal before and after the change of the transmission frequency of the electromagnetic waves based on the information regarding the transmission characteristic and the amount of change in the transmission frequency of the electromagnetic waves.

4. The vehicular power transmission device according to claim 1, further comprising:

an acquisition unit which acquires a reception power of the electromagnetic waves to be received by the mobile device,

wherein the power transmission unit changes the transmission power of the electromagnetic waves based on the reception power of the electromagnetic waves acquired by the acquisition unit.

5. The vehicular power transmission device according to claim 2, further comprising:

an acquisition unit which acquires a reception power of the electromagnetic waves to be received by the mobile device,

wherein the power transmission unit changes the transmission power of the electromagnetic waves based on the reception power of the electromagnetic waves acquired by the acquisition unit.

6. The vehicular power transmission device according to claim 3, further comprising:

an acquisition unit which acquires a reception power of the electromagnetic waves to be received by the mobile device,

wherein the power transmission unit changes the transmission power of the electromagnetic waves based on the reception power of the electromagnetic waves acquired by the acquisition unit.