Wireless energy transfer and continuous radio station signal coexistence
US-9379780-B2 · Jun 28, 2016 · US
Electric power transmission device, electric power reception device, vehicle, and non-contact electric power feed system
US9735625B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9735625-B2 |
| Application number | US-201214389493-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 11, 2012 |
| Priority date | May 11, 2012 |
| Publication date | Aug 15, 2017 |
| Grant date | Aug 15, 2017 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
In a non-contact electric power feed system, electric power is supplied in a non-contact manner from an electric power transmission device to a vehicle representing an electric power reception device. The electric power transmission device includes an electric power transmission unit, a communication unit for radio communication with the electric power reception device, and a control device for controlling the electric power transmission unit. The control device varies transmitted electric power from the electric power transmission unit while the electric power transmission unit transmits electric power, and determines whether or not pairing between the vehicle specified as an electric power transmission target and the electric power transmission unit is appropriate, based on information on variation in electric power from the vehicle specified as the electric power transmission target through radio communication.
First claim
Opening claim text (preview).
The invention claimed is: 1. An electric power transmission device for supplying electric power to an electric power reception device in a non-contact manner, comprising: an electric power transmission unit capable of supplying electric power to the electric power reception device in a non-contact manner; a communication unit for radio communication with the electric power reception device; and a control device for controlling the electric power transmission unit, the control device determining whether a specified electric power reception device is an electric power reception device to which electric power is to be transmitted from the electric power transmission unit based on information from the electric power reception device specified as an electric power transmission target through radio communication by the communication unit, when electric power transmitted from the electric power transmission unit is varied while the electric power transmission unit transmits electric power. 2. The electric power transmission device according to claim 1 , wherein the control device determines that the specified electric power reception device is the electric power reception device to which electric power is to be transmitted from the electric power transmission unit when information corresponding to variation in the transmitted electric power has been received from the specified electric power reception device. 3. The electric power transmission device according to claim 1 , wherein the control device determines that the specified electric power reception device is not the electric power reception device to which electric power is to be transmitted from the electric power transmission unit when information corresponding to variation in the transmitted electric power has not been received from the specified electric power reception device. 4. The electric power transmission device according to claim 3 , wherein the control device determines that another electric power reception device is the electric power reception device to which electric power is to be transmitted from the electric power transmission unit, when information originating from variation in the transmitted electric power has been received from the another electric power reception device not specified as the electric power transmission target in the communication unit when the transmitted electric power from the electric power transmission unit is varied. 5. The electric power transmission device according to claim 4 , further comprising another electric power transmission unit different from the electric power transmission unit, wherein the control device causes information on electric power transmission by the electric power transmission unit to be stored, and the control device interchanges stored information on electric power transmission by the electric power transmission unit with information on electric power transmission by the another electric power transmission unit, when it is determined that the another electric power reception device is the electric power reception device to which electric power is to be transmitted from the electric power transmission unit and when the another electric power transmission unit has transmitted electric power to the specified electric power reception device. 6. The electric power transmission device according to claim 1 , wherein the control device changes the transmitted electric power by varying at least one of a current and a voltage. 7. The electric power transmission device according to claim 1 , wherein the electric power reception device includes an electric power reception unit for receiving electric power from the electric power transmission device in a non-contact manner, and a difference in natural frequency between the electric power transmission unit and the electric power reception unit is not greater than ±10% of the natural frequency of the electric power transmission unit or the natural frequency of the electric power reception unit. 8. The electric power transmission device according to claim 1 , wherein the electric power reception device includes an electric power reception unit receiving electric power from the electric power transmission device in a non-contact manner, and a coefficient of coupling between the electric power transmission unit and the electric power reception unit is not greater than 0.1. 9. The electric power transmission device according to claim 1 , wherein the electric power reception device includes an electric power reception unit receiving electric power from the electric power transmission device in a non-contact manner, and the electric power reception unit receives electric power from the electric power transmission unit through at least one of magnetic field formed between the electric power reception unit and the electric power transmission unit and oscillating at a specific frequency, and electric field formed between the electric power reception unit and the electric power transmission unit and oscillating at a specific frequency. 10. An electric power transmission device for supplying electric power to an electric power reception device in a non-contact manner, comprising: first and second electric power transmission units; first and second control units for controlling the first and second electric power transmission units, respectively; and a control device for overall control of the first and second control units, the control device including a communication unit for communicating with the electric power reception device, and the control device determining whether specified the electric power reception device is an electric power reception device to which electric power is to be transmitted from the first electric power transmission unit based on information from the electric power reception device specified as an electric power transmission target of the first electric power transmission unit through radio communication by the communication unit when electric power transmitted from the first electric power transmission unit is varied while the first electric power transmission unit transmits electric power. 11. An electric power reception device for receiving electric power from an electric power transmission device in a non-contact manner, comprising: a communication unit for radio communication with the electric power transmission device; and a control device, the control device providing a request for variation in transmitted electric power to an electric power transmission device specified as an electric power transmission device which transmits electric power to the electric power reception device through radio communication by the communication unit while electric power is received, and determining whether the specified electric power transmission device is the electric power transmission device which should transmit electric power to the electric power reception device based on variation in transmitted electric power from the specified electric power transmission device. 12. The electric power reception device according to claim 11 , wherein the control device determines that the specified electric power transmission device is the electric power transmission device which should transmit electric power to the electric power reception device when variation in the transmitted electric power meets the request. 13. The electric power reception device according to claim 11 , further comprising an electric power reception unit for receiving electric power in a non-contact manner from an electric power transmission unit of the electric power transmission device, wherein a di
Assignees
Inventors
Classifications
Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil · CPC title
using wireless data transmission · CPC title
with electronic devices having internal batteries, e.g. mobile phones · CPC title
Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing · CPC title
by positioning the vehicle · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9735625B2 cover?
- In a non-contact electric power feed system, electric power is supplied in a non-contact manner from an electric power transmission device to a vehicle representing an electric power reception device. The electric power transmission device includes an electric power transmission unit, a communication unit for radio communication with the electric power reception device, and a control device for…
- Who is the assignee on this patent?
- Gorai Naoki, Ichikawa Shinji, Inoue Keisuke, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification B60L7/14. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 15 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).