EV Charging Authentication Switching for Billing Continuity
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Solution Overview
Problem
In the charging system for electric vehicles, authentication issues between the vehicle and charging equipment can lead to defects such as compatibility problems, invalid authentication information, and contract validity issues, causing communication sessions to stop and affecting billing and charging processes.
Innovation Solution
A charging control apparatus with a hardware processor performs a first authentication procedure with external charging equipment and switches to a second authentication procedure, such as the external identification means, when abnormalities are detected, using certificate chains and OCSP responders to validate certificates and ensure secure communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a first authentication procedure (PnC) is performed between the vehicle and charging equipment, then billing and charging become possible, but authentication abnormalities such as compatibility issues, invalid authentication information, and contract validity problems may occur
Solution Approach 1:
The system dynamically switches between the first authentication procedure (PnC) and the second authentication procedure (EIM) based on detection results. When authentication abnormalities are detected, the system automatically transitions to the alternative authentication method, making the authentication system flexible and adaptive rather than static
Solution Approach 2:
The system performs detection of authentication abnormalities during the authentication process and prepares alternative authentication procedures in advance. By detecting issues early and having backup authentication methods ready, the system can switch procedures before complete authentication failure occurs
2Reliability
If the first authentication procedure is switched to a second authentication procedure upon detecting abnormalities, then authentication reliability is improved, but system complexity increases due to multiple authentication methods
Solution Approach 1:
The charging control apparatus is designed to support multiple authentication procedures (PnC and EIM) within a single system. This multi-functionality allows the system to handle different authentication scenarios and switch between methods, making the system universally applicable to various authentication requirements without requiring separate dedicated systems
3Productivity
If authentication abnormalities are not addressed, then communication sessions stop and charging operations are affected, but implementing multiple authentication procedures increases processing time
Solution Approach 1:
The system continuously monitors the authentication process and provides feedback on authentication status. When abnormalities are detected, the feedback mechanism triggers an automatic switch to alternative authentication procedures, allowing the system to respond to and correct authentication issues in real-time without manual intervention
Solution Approach 2:
By preparing alternative authentication procedures in advance and switching automatically when abnormalities are detected, the system maintains continuous charging operations. The useful action of charging is not interrupted by authentication failures, as the system seamlessly transitions between authentication methods to keep the charging process ongoing
Data Source
AI summary
A hardware processor is configured to (i) perform a first authentication procedure with an external charging equipment that charges a battery, the external charging equipment being external of the apparatus on which the battery is mounted, and (ii) when an abnormality is detected in the first authentication procedure, perform the first authentication procedure or a second authentication procedure in place of the first authentication procedure depending on a type of the abnormality.