EV Charging Cable Authentication for Multi-Voltage Battery Safety
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Solution Overview
Problem
Existing electric vehicle charging systems face compatibility issues with different battery types and voltages, and there is a risk of using non-conforming charging cables that may be dangerous and damage both the charging station and the battery.
Innovation Solution
A charging system with authentication circuits in both the charging cable and station, using a unique cable identifier code and user identification token to ensure authentic cables are used, preventing power delivery if authentication fails, and automatically adjusting voltage based on detected battery type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If charging cables without authentication are used, then ease of operation is improved, but reliability deteriorates due to risk of using non-conforming cables
Solution Approach 1:
The authentication circuit performs verification of the charging cable's conformity codes before allowing power delivery. The system pre-checks compatibility and safety parameters through authentication algorithms, ensuring that only verified cables can establish charging connections. This preliminary verification action prevents unsafe cables from causing damage while maintaining operational simplicity for users.
2Reliability
If authentication circuits are added to charging cables and stations, then reliability is improved, but device complexity worsens
Solution Approach 1:
The authentication circuit is designed to be integrated into both charging cables and charging stations as a universal safety mechanism. The same authentication algorithm and verification protocol are applied regardless of the specific cable or station model, creating a standardized multi-functional system that handles both safety verification and charging control through a single integrated approach.
Solution Approach 2:
The authentication circuit acts as an intermediary layer between the power delivery system and the charging cable. Rather than adding complex control mechanisms throughout the entire charging system, the authentication circuit serves as a dedicated mediator that verifies cable conformity codes and controls power delivery authorization, simplifying the overall system architecture while maintaining high reliability.
3Object-affected harmful factors
If cable authentication is implemented, then object-affected harmful factors are reduced, but measurement precision requirements increase
Solution Approach 1:
The authentication system focuses verification efforts on specific critical parameters rather than requiring perfect measurement of all cable characteristics. The authentication circuit checks localized conformity codes that represent key safety and compatibility attributes, such as voltage ratings and connector types, providing sufficient protection without demanding exhaustive measurement precision across the entire cable specification.
Data Source
AI summary
A charging system of an electric vehicle battery is provided. The charging system has a charging station and at least one charging cable connectable to a battery to be charged. The charging station has at least one power unit provided with a power card adapted to charge the battery and a female-type connector adapted to connect to a male-type connector of the at least one charging cable. The at least one charging cable and the charging station have respective authentication circuits configured to implement a cable authentication algorithm which, in case of positive outcome, enables charging the battery. The charging system allows charging batteries of different types and working voltages. A method for charging an electric vehicle battery is also provided.