Charging system, foreign object detection method and component, charging control method and device
A foreign object detection and foreign object technology, applied in the direction of measuring devices, circuit devices, radio wave measurement systems, etc., can solve the problems of poor error calibration effect, poor user experience, easy misjudgment of foreign objects in the distance between the transmitting coil and the receiving coil, etc., to achieve The effect of overcoming misjudgment, improving accuracy, and increasing charging distance
Active Publication Date: 2022-02-15
BOE TECH GRP CO LTD
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Problems solved by technology
Since the power loss increases with the increase of the transmitted power, it is necessary to perform error calibration on the power received by the receiving coil; however, the effect of error calibration is poor, which makes it easy to misjudge the existence of foreign objects when the distance between the transmitting coil and the receiving coil is large, reducing the poor user experience
Method used
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[0072] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure.
[0073] The terms "a", "an" and "the" are used to indicate the presence of one or more elements / components / etc; Additional elements / components / etc. may be present in addition to the listed elements / components / etc. The words "first" and "second" etc. are used only as marks, not to limit the num...
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The disclosure provides a charging system, a foreign object detection method and components, a charging control method and a device, and belongs to the field of wireless technology. The foreign matter detection method includes: receiving the voltage value and current value of the transmitting coil, and determining the mutual inductance value of the transmitting coil according to the voltage value and current value of the transmitting coil; receiving the voltage value and current value of the receiving coil, and determining the mutual inductance value according to the voltage value of the receiving coil and the current value to determine the mutual inductance value of the receiving coil; according to the mutual inductance value of the transmitting coil and the mutual inductance value of the receiving coil, determine whether there is a conductor foreign object between the receiving coil and the transmitting coil. The conductor foreign matter detection method of the wireless charging system can increase the charging distance of the wireless charging system.
Description
technical field [0001] The present disclosure relates to the technical field of wireless charging, and in particular to a method for detecting foreign objects in a conductor of a wireless charging system, a method for controlling wireless charging in a wireless charging system, a component for detecting foreign objects in a wireless charging system, a control device for a wireless charging system, and a wireless charging system. Background technique [0002] Wireless charging uses the coupling of a changing magnetic field between the transmitting coil and the receiving coil to achieve the purpose of energy transmission. If there is a metal foreign object between the transmitting coil and the receiving coil, the metal foreign object will generate an eddy current in the changing magnetic field and heat up, resulting in a potential safety hazard. [0003] In the prior art, during the wireless charging process, the difference between the power transmitted by the transmitting coi...
Claims
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IPC IPC(8): G01V3/11H02J50/60H02J50/80
CPCG01V3/10H02J50/60H02J50/80H02J7/00034Y02T90/14Y02T10/70Y02T10/7072H02J50/12G01V3/104
Inventor 李志超赵天月李咸珍管恩慧赵天啸邓伟穆东磊冈村政和
Owner BOE TECH GRP CO LTD