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Metal foreign matter detection system of wireless charging system

A metal foreign body, wireless charging technology, applied in circuit devices, electrical components, etc., can solve the problems of difficult to distinguish metal foreign bodies, detect the influence of metal foreign bodies, etc., to improve the anti-offset and reduce the effect of coupling

Pending Publication Date: 2022-05-10
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the charging process, the offset of the receiving coil will affect the detection of metal foreign objects by the system, and it is difficult to distinguish whether it is the offset of the receiving coil or the introduction of metal foreign objects.

Method used

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  • Metal foreign matter detection system of wireless charging system
  • Metal foreign matter detection system of wireless charging system
  • Metal foreign matter detection system of wireless charging system

Examples

Experimental program
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Embodiment

[0026] Embodiment: A metal foreign object detection system for a wireless charging system, including a differential vertical detection coil group placed on the wireless charging system transmitting coil, a signal acquisition and processing unit, and a judgment and identification unit; When a signal different from the normal situation is generated, the signal is collected and processed by the signal acquisition and processing unit, and then provided to the judgment and identification unit for identification.

[0027] In this embodiment, the overall structure diagram of the detection scheme for wireless charging metal foreign object detection includes: (1) differential vertical detection coil group; (2) strobe switch; (3) same-phase proportional amplification circuit; (4) peak value Detection circuit; (5) Microcontroller with analog-to-digital conversion function. The set of differential vertical detection coils includes multiple sets of differential vertical detection coils, an...

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Abstract

The invention discloses a metal foreign matter detection system for a wireless charging system. The metal foreign matter detection system comprises a differential vertical detection coil group arranged on a transmitting coil of the wireless charging system, a signal acquisition and processing unit and a judgment and recognition unit, the differential vertical detection coil assembly generates a signal different from a normal condition when a metal foreign body exists, and the signal is collected and processed by the signal collecting and processing unit and then is provided for the judgment and recognition unit to be recognized by the judgment and recognition unit. According to the invention, the metal foreign matter detection in the wireless charging system can be realized, whether the metal foreign matter exists in the system can be detected under the condition that the receiving coil deviates, and the anti-deviation performance is good.

Description

technical field [0001] The invention relates to the technical field of wireless charging, in particular to a metal foreign object detection system for a wireless charging system. Background technique [0002] Wireless charging couples the transmitting coil and the receiving coil through a magnetic field, realizing convenient, efficient and safe transmission of electric energy. However, metal foreign objects in the transmission area will generate eddy currents in the magnetic field, causing power loss or burning hazards. Therefore, in wireless charging, it is necessary to effectively detect metal foreign objects, protect charging equipment and prevent hidden dangers. [0003] At present, there are mainly three types of metal foreign object detection schemes: system parameter detection scheme, wave-based detection scheme and field-based detection scheme. The detection scheme based on system parameters includes electrical parameter detection and non-electrical parameter detec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/10H02J50/60
CPCH02J50/10H02J50/60
Inventor 钟文兴项飞
Owner ZHEJIANG UNIV
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