A wireless charging foreign object detection method, system, device, and medium
By applying a frequency sweep excitation signal and bidirectional digital authentication to the wireless charging system, a multidimensional impedance characteristic is constructed, which solves the problem of difficulty in balancing detection reliability, cost and real-time security in the existing technology, and realizes foreign object detection with high sensitivity and low false alarm rate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- YINFER HUICHONG (ZHEJIANG) TECHNOLOGY CO LTD
- Filing Date
- 2026-03-03
- Publication Date
- 2026-07-17
AI Technical Summary
Existing wireless charging foreign object detection technologies struggle to balance detection reliability, system cost, and real-time safety, making it impossible to achieve continuous, accurate, and interference-free foreign object monitoring during full-power charging.
By applying a frequency sweep excitation signal to the transmitting coil, the voltage and current responses of the coupling system are collected to construct multidimensional impedance characteristics. Combined with bidirectional digital authentication, safety risks are assessed in a coordinated manner, full-power charging is prohibited, and abnormal handling is triggered.
It improves the sensitivity and accuracy of foreign object detection, reduces the false alarm rate, and ensures high safety and real-time response capabilities during full-power charging.
Smart Images
Figure CN122419019A_ABST