EV Charger Terminal Voltage Modulation for Vehicle Identification
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Solution Overview
Problem
Current electric vehicle charging terminals lack the ability to identify the type of vehicle connected, limiting optimal energy management in multi-terminal car parks, as they cannot differentiate between vehicles based on their charging characteristics, leading to inefficient energy distribution and unused capacity.
Innovation Solution
The method involves generating and modulating DC voltages to determine the type of electric vehicle charger connected, using timers to record diagnosis times and compare them with standard values in a database, allowing for customized adjustment of charge current and power delivery based on the identified charger characteristics, thereby optimizing energy management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If charging terminals use standardized voltage modulation to authorize charging, then charging safety and control are improved, but the ability to identify vehicle type and optimize energy distribution is lost
Solution Approach 1:
The charging authorization process is segmented into multiple voltage modulation phases: initial voltage application, diagnosis phase with specific voltage levels, and charging phase. Each phase serves a distinct function, allowing the system to both ensure safety through standardized protocols and identify vehicle characteristics through measured responses during these segmented steps.
Solution Approach 2:
The system performs preliminary voltage modulation and measurement actions before actual charging begins. By applying diagnostic voltage levels and measuring the vehicle's response during the authorization phase, the system gathers information about vehicle charger characteristics in advance, enabling later optimization without compromising safety.
2Device complexity
If charging terminals deliver fixed power regardless of vehicle type, then system simplicity is maintained, but energy distribution efficiency deteriorates
Solution Approach 1:
The system incorporates feedback by measuring the vehicle's electrical response during the voltage modulation diagnosis phase. Based on the measured current and voltage characteristics, the system identifies the vehicle charger type and uses this feedback information to optimize power distribution during the actual charging phase, improving energy efficiency while maintaining operational simplicity.
Solution Approach 2:
The system changes operational parameters dynamically based on identified vehicle characteristics. After diagnosis, the charging terminal adjusts voltage levels, current limits, and power delivery parameters according to the specific vehicle type detected, optimizing energy distribution efficiency without requiring complex hardware modifications.
3Device complexity
If charging terminals monitor only basic safety parameters, then monitoring simplicity is maintained, but the ability to optimize charging based on vehicle characteristics is lost
Solution Approach 1:
The voltage modulation and measurement mechanism serves multiple functions: it ensures charging safety through standardized authorization protocols, identifies vehicle charger types through measured electrical responses, and provides data for optimizing power distribution. This multi-functional approach enables comprehensive monitoring and optimization without adding separate dedicated systems.
Solution Approach 2:
The system uses the vehicle's own electrical response during the standardized authorization process to self-identify its charger type. The vehicle charger's natural electrical characteristics during voltage application provide the identification information, eliminating the need for separate identification hardware or complex communication protocols.
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
This approach enables precise identification of electric vehicle chargers, allowing for optimized energy distribution across multiple terminals, reducing waste and enhancing overall charging efficiency by adjusting charge current and power delivery according to the specific characteristics of each vehicle.
Implementation Method 1
authorising charging of the electric vehicle by modulating the 'output' voltage between a positive value equal to the second voltage value and a negative value equal to the opposite of the first voltage value, the modulation of PWM type having a duty ratio fixed according to a maximum authorised charge current
Data Source
AI summary
A method for monitoring and optimizing operation of a terminal, including: generating an output voltage equal to a first DC value; connecting a vehicle, the output voltage switching to a second value; authorizing charging of the vehicle by modulating the output voltage between two values, with a maximum authorized charge current being set; checking an ability of the vehicle to be recharged by monitoring a value of the output voltage; supplying an output voltage modulated between a third voltage value and a negative value; initializing a first timer; reading a diagnosis time between initialization and the switching of the voltage from the second to the third value; comparing the time with standard values to determine a type of charger; taking characteristics of the charger into account to optimize energy management.