EV Contract Certificate Roaming Installation for Plug-and-Charge
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Solution Overview
Problem
Conventional electric vehicle charging systems lack a mechanism for installing or updating contract certificates in a roaming environment, leading to inconveniences and authentication delays when a vehicle visits a charging station without a valid contract certificate, necessitating payment through external identification means.
Innovation Solution
A method and device for installing or updating contract certificates in electric vehicles by transmitting them to external charging service providers with roaming contracts, using a certificate installation package that includes a contract certificate chain and eMAID information, and facilitating installation through a certificate provisioning service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the EV visits a charging station without a valid contract certificate, then the PnC mechanism cannot work and external identification means must be used, but this causes inconvenience and delays for the EV driver
Solution Approach 1:
The home CSP distributes the contract certificate to visited CSPs in advance before the EV actually needs it. This preliminary distribution ensures that when the EV arrives at a roaming charging station, the certificate is already available at the visited CSP, enabling immediate PnC authentication without requiring external identification means.
2Reliability
If the contract certificate validation is performed only at home CSP or separate clearing house, then authentication can be completed, but this causes authentication delay
Solution Approach 1:
The visited CSP receives and stores the contract certificate distribution package in advance from the home CSP. When the EV presents its contract certificate for validation, the visited CSP can immediately validate it against the pre-received distribution package without needing to contact the home CSP or clearing house, thus eliminating authentication delay while maintaining accuracy.
Solution Approach 2:
The contract certificate distribution package acts as an intermediary that carries the necessary validation information from the home CSP to the visited CSP. This intermediary enables the visited CSP to perform local validation without real-time communication with the home CSP, reducing authentication time while ensuring accurate verification.
3Adaptability or versatility
If the EV lacks MO RootCA Certificate, then the EV cannot submit the RootCA Certificate to visited CSO, but this limits the certificate validation capability
Solution Approach 1:
The home CSP acts as an intermediary that provides the contract certificate distribution package containing the necessary RootCA certificate information to the visited CSP. This allows the visited CSP to perform validation without the EV needing to possess the MO RootCA Certificate directly, enabling roaming capability while maintaining validation reliability.
Data Source
AI summary
The present disclosure provides a method for supporting installation of a contract certificate by a charging service providing device. As an example, the present disclosure may comprise the steps of: generating a first contract certificate for a first electric vehicle (EV); and transmitting the first contract certificate to a first external charging service providing device (CSP) with which a roaming contract has been made, so as to enable the first contract certificate to be installed in the first EV via the first external CSP in a roaming situation.