In-Motion Power Supply Timing Control for Foreign Object Overheating

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Solution Overview

Problem

Existing power supply systems risk overheating foreign objects when power is supplied to vehicles in motion, particularly when a foreign object is present during power transfer.

Innovation Solution

An in-motion power supply control device that includes a processor to limit the continuous power supply time to a predetermined value when no foreign object detection is available, ensuring safe power transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If power is supplied to a vehicle in motion using a supply device without a foreign object detection unit, then power transfer can proceed without interruption, but foreign objects may overheat due to prolonged exposure to electromagnetic fields

Engineering Contradiction:

Improvepower transfer continuityVSAvoidforeign object overheating

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary timing control by pre-determining a maximum power supply time threshold before actual power transfer begins. This preliminary action establishes a safety constraint that prevents foreign object overheating while allowing continuous power transfer operation, resolving the contradiction between productivity and safety.

Inventive Principle:

Principle #10Preliminary action

2Object-affected harmful factors

If the power supply time is limited to prevent foreign object overheating, then safety is improved, but the duration of power supply is reduced

Engineering Contradiction:

Improveforeign object overheating preventionVSAvoidpower supply duration

Core Design Contradiction:

Object-affected harmful factorsVSDuration of action of moving object

Solution Approach 1:

The system changes the time parameter by imposing a maximum power supply time limit. This parameter change directly prevents foreign object overheating while maintaining power transfer effectiveness within the controlled duration, resolving the contradiction between safety and operation duration.

Inventive Principle:

Principle #35Parameter changes

3Difficulty of detecting and measuring

If a foreign object detection unit is installed to detect foreign objects, then foreign object detection capability is improved, but device complexity increases

Engineering Contradiction:

Improveforeign object detection capabilityVSAvoidsupply device structure

Core Design Contradiction:

Difficulty of detecting and measuringVSDevice complexity

Solution Approach 1:

The system extracts the foreign object detection function from the physical hardware by using timing control logic instead of a dedicated detection unit. This extraction eliminates the need for additional sensors and detection circuits, maintaining foreign object safety while reducing device complexity.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system introduces time as an intermediary parameter to indirectly detect and respond to foreign object presence. Rather than directly detecting foreign objects, the timing control mechanism uses power supply duration as a mediator to prevent overheating, simplifying the overall system architecture.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12479322B2In-motion power supply control device

Publication Date: 2025.11.25 TOYOTA JIDOSHA KK

AI summary

An in-motion power supply control device includes a processor, which limits a continuous power supply time for a vehicle in motion to a predetermined value or less in a case where a supply device that transfers power to the vehicle in motion includes no foreign object detection unit.