Power receiver device for dynamic inductive energy supply to electric vehicle

The power receiver device uses signal detection units to monitor magnetic field signals and determine communication abnormalities, ensuring reliable power transmission by preventing operation during faults.

WO2026115855A1PCT designated stage Publication Date: 2026-06-04DENSO CORP +2
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
DENSO CORP
Filing Date
2025-09-10
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Existing wireless power supply systems for electric vehicles face challenges in determining whether an abnormality has occurred in communication between the power transmitter and receiver devices, which can lead to improper transmission of power supply request signals.

Method used

The power receiver device is equipped with a signal detection unit to monitor magnetic field signals and determine communication abnormalities by calculating intensity values or comparing demodulated signals, allowing for controlled energization and preventing continuous operation during anomalies.

Benefits of technology

This solution enables accurate detection of communication abnormalities, preventing the power receiver device from being used in a faulty state and ensuring reliable power transmission.

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Abstract

A power receiver device (100) includes a power receiver side communication coil (170), a power receiver side control unit (230) configured to control energization of the power receiver side communication coil (170) to supply a power supply request signal to a power transmitter coil (22) to the power receiver side communication coil (170), and a detector coil (401) configured to detect a magnetic field signal generated by the power receiver side communication coil (170) or a correlation value of the magnetic field signal.　 The power receiver side control unit (230) determines whether an abnormality occurs in communication with the power receiver device (100) based on a detected value of the detector coil (401).
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