EV Charging Connector RFID Validation for Vehicle Authorization

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Solution Overview

Problem

Conventional EV charging stations lack a convenient and effective authentication and validation mechanism for identifying and authorizing specific electric vehicles, particularly in scenarios where the RFID reader is not embedded in the EV charger base unit, leading to unauthorized charging and inefficiencies.

Innovation Solution

Incorporating a radio frequency identification (RFID) reader within or on the EV connector housing to read RFID tags for authentication and validation, enabling secure and seamless charging by verifying the vehicle's identification and proximity, thereby allowing only authorized vehicles to be charged.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the RFID reader is embedded in the EV charger base unit, then authentication capability is provided, but the charging station cannot be used in scenarios without a base unit (e.g., circuit breaker form factor)

Engineering Contradiction:

Improvecharging station configuration flexibilityVSAvoidauthentication mechanism reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The RFID reader is extracted from the EV charger base unit and integrated into the connector assembly, separating the authentication function from the power delivery function. This allows the RFID reader to be present in the connector regardless of whether a base unit is used, enabling authentication in both base unit and circuit breaker configurations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The connector assembly serves as an intermediary component that bridges the gap between the power delivery system and the authentication system. By placing the RFID reader in the connector, it acts as a mediator that can perform authentication independently of the base unit's presence.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If no authentication mechanism is provided, then the charging station can charge any vehicle, but unauthorized vehicles can be charged leading to cost loss

Engineering Contradiction:

Improvevehicle authorization verificationVSAvoidcharging station structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The connector assembly with integrated RFID reader provides self-service authentication capability at the point of connection. The RFID reader automatically reads the RFID tag when the connector is inserted into the vehicle, performing verification without requiring additional authentication equipment or manual intervention at the base unit.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces potential mechanical authentication systems (such as physical keys or manual verification) with an RFID-based electromagnetic field system. The RFID reader communicates with the RFID tag through electromagnetic fields, providing contactless and automated authentication.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If manual authentication procedures are used, then authorization can be verified, but the charging process becomes time-consuming and inefficient

Engineering Contradiction:

Improvecharging process efficiencyVSAvoidauthentication time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The RFID tag is pre-loaded with vehicle identification and authorization information before the charging process begins. When the connector is inserted, the RFID reader immediately reads this pre-prepared information, eliminating the need for manual verification steps during the charging process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Manual authentication procedures are replaced with automated RFID electromagnetic field-based authentication. The RFID reader automatically detects and verifies the RFID tag upon connector insertion, significantly reducing authentication time compared to manual procedures.

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

Provides a convenient and secure charging process by ensuring only authorized vehicles are charged, reducing unauthorized usage and streamlining the charging process through automatic alignment and validation, applicable to various charging station environments.

Implementation Method 1

Incorporating a radio frequency identification (RFID) reader within or on the EV connector housing to read RFID tags for authentication and validation

Methodology Applied

Scientific EffectRadio frequency identification (RFID): Electromagnetic Induction

Data Source

PatentUS20260070440A1Electric vehicle charging system and connector having an RFID reader and method for RF validation for charging electric vehicle

Publication Date: 2026.03.12 EATON INTELLIGENT POWER LTD

AI summary

A connector for use in charging an electric vehicle (EV). The connector includes a housing, an electrical receptacle coupled to the housing and structured to be inserted into and electrically couple with a charging port of the electric vehicle, and a radio frequency identification (RFID) reader disposed within or on the housing of the connector, the RFID reader structured to read RFID tags and, in response to reading an approved code from an RFID tag, to enable charging of the EV.