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Metal foreign matter detecting device, wireless charging system and method

A metal foreign body and detection device technology, applied in the detection field, can solve the problems of low detection accuracy and the like

Inactive Publication Date: 2019-05-31
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide a metal foreign object detection device, wireless charging system and method for the problem of low detection accuracy of traditional foreign object detection methods

Method used

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  • Metal foreign matter detecting device, wireless charging system and method
  • Metal foreign matter detecting device, wireless charging system and method
  • Metal foreign matter detecting device, wireless charging system and method

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Embodiment Construction

[0069] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0070] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to"...

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Abstract

The application provides a metal foreign object detecting device, a wireless charging system and a method. The metal foreign matter detecting device includes a giant magneto-impedance device and a voltage detector; the voltage detector is used for detecting the voltage change of the giant magneto-impedance device; and the giant magneto-impedance device has a characteristic that the resistivity ofthe giant magneto-impedance device varies with the magnitude of a magnetic field. When metal foreign object detection is performed on a position to be detected, the metal foreign matter detecting device is energized; and if the voltage detector detects that the voltage value of the two ends of the giant magneto-impedance device is hopping, it is determined that a metal foreign matter exists in theposition to be detected. The metal foreign matter detecting device realizes a high-precision foreign matter detecting function by means of the characteristic of the giant magneto-impedance device.

Description

technical field [0001] The present application relates to the field of detection technology, in particular to a metal foreign object detection device, wireless charging system and method. Background technique [0002] Automotive wireless charging technology refers to the use of electromagnetic induction principles or other related AC induction technologies to provide electrical energy for automotive power batteries without the use of wires. The unique advantages of wireless charging, such as convenience of use, charging safety, vehicle-network power transmission flexibility, and applicability of unmanned electric vehicles, make wireless charging technology have a relatively broad development space. [0003] At present, the mainstream wireless charging of automobiles realizes energy transmission through a magnetic field. When there is a foreign object, especially a metal foreign object, between the transmitting coil and the receiving coil, the alternating magnetic field will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08B60L53/12
CPCY02T10/70Y02T10/7072Y02T90/14
Inventor 杨福源石秉坤党健欧阳明高
Owner TSINGHUA UNIV