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Foreign matter detection device of wireless charging system

A technology of foreign object detection and wireless charging, which is applied in the direction of circuit devices, electromagnetic wave detection, electrical components, etc., can solve the problems of biological health damage, wireless charging system can not find biological objects, etc., and achieve the effect of avoiding the entry of foreign objects

Pending Publication Date: 2020-07-03
BEIJING INVISPOWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, there will be a possibility that if the organism enters the power transmission area after the charging system is shut down, the wireless charging system may not be able to detect the entry of the organism and resume power transmission. In this case, there will still be damage to the health of the organism. possible

Method used

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  • Foreign matter detection device of wireless charging system
  • Foreign matter detection device of wireless charging system

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Embodiment Construction

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0018] The foreign object detection device of the wireless charging system of the present invention has a transmitting side detector. The transmitting side detector is arranged at the transmitting end of the wireless charging system. The transmitting end includes a power transmitting coil, and the receiving end includes a power receiving coil. During wireless charging, the high-frequency drive source outputs an alternating current of a certain frequency and applies it to the power transmitting coil to generate an electromagnetic field o...

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Abstract

The invention discloses a foreign matter detection device for a wireless charging system, and the device is provided with a transmitting side detector which is disposed at a transmitting end of the wireless charging system. The transmitting side detector comprises a first antenna set and an excitation circuit which are connected in sequence; the first antenna set comprises a plurality of first antennas; each first antenna has a transmitting function and a receiving function; the excitation circuit is communicated with one first antenna, so that the first antenna starts a transmitting functionand serves as a transmitting antenna to transmit a signal; and a receiving function of the first antenna except the transmitting antenna is started, and the first antenna is taken as a receiving antenna to receive a signal. According to the foreign matter detection device of the wireless charging system, foreign matter detection is achieved through the transmitting side detector and the receivingside detector, foreign matter detection is achieved through the antennas of the detectors on the two sides, and danger caused by foreign matter entering in the charging process is avoided.

Description

technical field [0001] The invention relates to the field of wireless charging, in particular to a foreign object detection device of a wireless charging system. Background technique [0002] During the wireless charging process, if there is a metal foreign object on the power transmitting coil, the temperature will rise sharply due to the eddy current effect generated by the magnetic field on the metal foreign object, and there may even be a danger of fire. At present, there are many designs, such as adding detection coils such as balance coils, and detecting foreign objects by measuring changes in parameters such as the impedance of the detection coils. Existing methods can detect foreign objects attached to the surface of the transmitting coil, but for foreign objects in the space Bottles with metal caps, objects wrapped with metal objects, etc. cannot be detected by the above method, which is still a hidden danger in wireless charging, especially high-power wireless char...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/60G01V3/12
CPCG01V3/12H02J50/60
Inventor 王哲陆钧贺凡波葛俊杰马俊超
Owner BEIJING INVISPOWER TECH CO LTD
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