Induction Charging Coil Positioning With On-Demand Activation

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Solution Overview

Problem

Existing wireless charging systems for motor vehicles face inefficiencies in energy transfer and operation due to the need for precise positioning of induction coils, leading to high energy consumption and reduced comfort in use.

Innovation Solution

A charging system with stationary induction charging devices equipped with positioning devices that generate signals for precise alignment, and a triggering mechanism to activate positioning devices only when a vehicle approaches, reducing energy consumption by deactivating unnecessary devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If positioning devices are continuously active to enable precise vehicle positioning, then positioning precision and user comfort improve, but energy consumption increases

Engineering Contradiction:

Improvepositioning precisionVSAvoidenergy consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The positioning devices are activated periodically or on-demand rather than continuously. The control unit receives signals from detection devices that monitor vehicle presence, and only activates positioning devices when a vehicle is detected in the parking lot, thereby reducing energy consumption while maintaining positioning precision when needed.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system uses detection devices that automatically sense vehicle presence and trigger the activation of positioning devices without manual intervention. The system self-regulates its operation based on detected conditions, activating resources only when necessary.

Inventive Principle:

Principle #25Self-service

2Adaptability or versatility

If multiple positioning devices are activated simultaneously to provide vehicle selection, then user comfort and system versatility improve, but energy consumption increases

Engineering Contradiction:

Improvevehicle selection capabilityVSAvoidenergy consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

Instead of uniformly activating all positioning devices, the system activates only those positioning devices corresponding to parking spaces where vehicles are detected or where charging is needed. Each positioning device operates based on local conditions detected by its associated detection device.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system activates only the necessary subset of positioning devices rather than all available devices. When multiple vehicles are present, only the positioning devices corresponding to occupied or relevant parking spaces are activated, providing sufficient functionality without excessive energy consumption.

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If all stationary induction charging devices operate continuously to ensure availability, then system reliability improves, but energy consumption increases

Engineering Contradiction:

Improvecharging availabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adjusts the operational state of stationary induction charging devices based on real-time vehicle detection. When vehicles are detected in the parking lot, the control unit activates the corresponding charging devices; when no vehicles are present, the devices are deactivated or placed in standby mode, optimizing the balance between availability and energy consumption.

Inventive Principle:

Principle #15Dynamics

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances energy transfer efficiency and user comfort by optimizing coil positioning and reducing energy waste through selective activation of positioning devices based on vehicle presence, while providing a clear selection of available charging points.

Implementation Method 1

The respective positioning device (4) generates, in a positioning operation for positioning the mobile induction charging device (101) relative to the stationary induction charging device (2), a positioning signal

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

The respective stationary induction charging device (2) interacts inductively with a mobile induction charging device (101) of a motor vehicle (100) in a charging operation for wireless power transmission

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS20260061870A1Charging system comprising induction charging devices

Publication Date: 2026.03.05 MAHLE INT GMBH

AI summary

A stationary induction charging device configured to inductively interact with a mobile induction charging device of a motor vehicle during a charging operation for wireless power transmission includes a positioning device configured to generate a positioning signal for positioning the mobile induction charging device to the stationary induction charging device. The stationary induction charging device further includes an activation interface configured to at least partially activate or deactivate the positioning device upon receiving a corresponding signal from a triggering device.