EV Charge Station Authentication via Electrical Parameter Verification

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Solution Overview

Problem

There is a need for a system that ensures accurate power transfer and authentication between a vehicle battery and a charge station, as existing technologies may not reliably confirm that the vehicle and charge station are connected correctly, leading to potential discrepancies in measured electrical parameters.

Innovation Solution

A charge system that includes a controller at the charge station, which establishes communication with the vehicle, initiates power transfer, and notifies the vehicle if the measured power, voltage, or current does not match the reported values, using algorithms to verify the correct connection and prevent charging if discrepancies are detected.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If power transfer is initiated without authentication, then charging speed is improved, but reliability of connection verification deteriorates

Engineering Contradiction:

Improvecharging speedVSAvoidconnection verification

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements authentication and connection verification procedures before initiating power transfer. The charge station and vehicle exchange authentication data and verify electrical parameters (voltage, current, power) before charging begins, ensuring reliable connection verification while maintaining charging efficiency.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If authentication protocols are implemented, then reliability of charge station verification is improved, but device complexity worsens

Engineering Contradiction:

Improvecharge station verificationVSAvoidauthentication system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent employs feedback mechanisms where the charge station and vehicle continuously monitor and compare electrical parameters (voltage, current, power) during the charging process. Discrepancies trigger notifications and authentication challenges, providing real-time verification without requiring complex dedicated authentication hardware.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If electrical parameter monitoring is performed, then measurement precision is improved, but loss of time worsens

Engineering Contradiction:

Improveelectrical parameter verificationVSAvoidauthentication time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent performs electrical parameter monitoring continuously during the charging process rather than as separate authentication steps. The charge station and vehicle continuously exchange and compare measurements of voltage, current, and power, enabling precise verification without additional authentication time delays.

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentUS9902280B2Vehicle and method for authenticating a charge station

Publication Date: 2018.02.27 FORD GLOBAL TECH LLC

AI summary

A charge station includes a controller that initiates charging of a battery of a vehicle and notifies the vehicle in response to an electrical parameter measured and reported by the vehicle not being approximately equal to a same electrical parameter measured at the charge station. The electrical parameter may be power, voltage or current.