Electric Vehicle Charging Installation With Auxiliary Power Source
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Solution Overview
Problem
The increasing number of electric vehicles poses a challenge for managing electrical energy demand during charging, leading to over-dimensioning of power stations, modification of power lines, and increased CO2 emissions, as well as peak electrical consumption and local network reinforcement.
Innovation Solution
A charging installation with a main power supply and an auxiliary power supply connected in parallel, a management system to activate the auxiliary source when the main source's capacity is exceeded, and conversion circuits to ensure efficient charging power delivery, reducing the overall electricity demand on the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fast recharging terminals are deployed to charge electric vehicles quickly, then charging speed and user convenience are improved, but the power demand on the electrical network increases significantly requiring over-dimensioning of power stations and modification of power lines
Solution Approach 1:
The system performs preliminary charging during off-peak hours when electrical network demand is low, storing energy in the battery. This preliminary action reduces the need for high-power fast charging during peak demand periods, thereby avoiding the need to over-dimension power stations and modify power lines while still providing quick charging capability when needed.
2Ease of operation
If multiple electric vehicles are charged simultaneously during the day, then user accessibility and service quality are improved, but peak electrical consumption increases requiring local reinforcement of the electricity network
Solution Approach 1:
The system implements periodic charging cycles, concentrating charging activities during off-peak hours when electrical demand is lower. By distributing charging loads periodically rather than simultaneously during peak hours, the system maintains user accessibility while avoiding peak electrical consumption surges that would require local network reinforcement.
3Productivity
If fast charging terminals are installed to provide high charging power, then charging efficiency is improved, but CO2 emissions increase due to higher overall electricity consumption
Solution Approach 1:
The system incorporates feedback mechanisms that monitor electrical network conditions, battery state of charge, and charging patterns. Based on this feedback, the system optimizes charging schedules to perform fast charging when renewable energy availability is high or grid demand is low, thereby maintaining high charging efficiency while reducing the carbon footprint by avoiding charging during periods when fossil fuel-based generation is predominant.
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 solution reduces the CO2 footprint of electrical kWh, smooths energy consumption, allows for more flexible installation of fast charging terminals, and lowers the overall cost of using fast charging stations by reducing network connection power requirements without compromising charging efficiency.
Implementation Method 1
a first circuit for converting the supply current or voltage delivered by said main source into a charging current or voltage for said electric battery and at least one second circuit for converting the supply current or voltage delivered by said auxiliary source into a charging current or voltage for said electric battery
Data Source
AI summary
An installation and a method for charging an electric battery for an electric vehicle. The electric vehicle comprises an on-board computer. The installation comprises a main power source delivering a charging power Pc1. The charging method comprises the step of determining the charging power Pc to be delivered to the electric battery in relation to a charging voltage and/or current set point demanded at an instant t by the onboard computer. The charging power is compared against the charging power Pc1 delivered by a main power source. If Pc>Pc1, at least one auxiliary power source delivering a charging power Pc2 is utilized in addition to the main power source such that the sum of the charging powers delivered by the power sources is equal to the charging power Pc.