Wireless EV-to-Home Power Supply with Prediction Control

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Solution Overview

Problem

Existing systems for supplying electrical power from electric vehicles to houses require manual connection of power cables, which can lead to connection faults due to environmental conditions and result in power delays and excesses/deficiencies, necessitating additional battery storage.

Innovation Solution

A power supply system utilizing wireless electromagnetic coupling between a power-supplying coil in the electric vehicle and a power-receiving coil in the house, with a power prediction device to anticipate power needs and adjust supply accordingly, eliminating the need for manual cable connection and reducing battery capacity requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual connection of power cables is used to supply electrical power from electric vehicle to house, then electrical power can be transferred between vehicle and house, but connection faults occur due to environmental conditions (rainwater, foreign objects, cold, hot, or dark environments)

Engineering Contradiction:

Improveelectrical connection reliabilityVSAvoidenvironmental exposure of plugs and receptacles

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical connection system (plugs and receptacles requiring manual engagement) with a wireless electromagnetic coupling system. The power-supplying coil in the electric vehicle and power-receiving coil in the house establish electromagnetic coupling to transfer power without physical contact, thereby eliminating exposure to environmental harmful factors.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If manual connection of power cables is used, then power transfer is possible, but time delay occurs in power transfer from electric vehicle to house

Engineering Contradiction:

Improvepower transfer speedVSAvoidpower supply delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The wireless electromagnetic coupling system eliminates the time required for manual cable connection and disconnection. Power transfer begins immediately when the coils are positioned within coupling distance, significantly reducing power supply delay compared to manual mechanical connection methods.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If rechargeable batteries are installed in the house to prevent power supply excesses or deficiencies, then power supply stability is improved, but device complexity and maintenance burden increase

Engineering Contradiction:

Improvepower supply stabilityVSAvoidhouse power supply system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The power supply control device in the electric vehicle performs self-service by predicting the house's power requirements and autonomously adjusting the power output to match predicted needs. This eliminates the need for additional battery storage systems in the house, maintaining power supply stability without increasing device complexity or maintenance burden.

Inventive Principle:

Principle #25Self-service

4Productivity

If power cable connection is required, then power transfer is possible, but ease of operation deteriorates due to manual engagement requirements in unpleasant environments

Engineering Contradiction:

Improvepower transfer capabilityVSAvoidmanual cable connection operation

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The wireless electromagnetic coupling system replaces manual mechanical cable connection with automated wireless power transfer. Users simply need to position the electric vehicle near the house, and the electromagnetic coupling automatically establishes power transfer without requiring manual plug engagement in unpleasant environmental conditions.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

This solution prevents connection faults and significantly reduces power supply delays, allowing for efficient and reliable wireless power transfer, thereby minimizing the need for additional battery storage in the house.

Implementation Method 1

The power-supplying coil and the power-receiving coil are constructed such that they form an electromagnetic coupling circuit when they are placed a preset distance apart from each other

Methodology Applied

Scientific EffectElectromagnetic coupling: Electromagnetic Induction

Data Source

PatentUS9866032B2Power supply system for house

Publication Date: 2018.01.09 IHI CORP

AI summary

A power supply system for a house is constructed such that electrical power that will need to be supplied from an electric vehicle to a house in a delay time taking a power transmission delay into account is predicted, a prediction data of the predicted electrical power is communicated to a power supply control device via a house communication device and a vehicle communication device, and electrical power that corresponds to the prediction data is supplied to a power-supplying coil by the power supply control device.