EV Charging Station Dynamic Rectifier Branch Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Quick charging stations for electric vehicles face challenges in accurately measuring and billing electrical energy due to dynamic load currents, variable voltages, and short charging durations, leading to system losses and inaccuracies in energy measurement.
Innovation Solution
A charging station with multiple rectifier branches and energy meters, coupled with a measured value capture computer that determines energy delivery at each charging point, allowing for precise energy measurement and assignment to vehicles, even during dynamic branch changes, and includes a charging procedure control unit for efficient power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic connection of rectifier branches to charging points is implemented, then utilization of expensive components is increased and required number of identical components is reduced, but system losses increase and measurement accuracy deteriorates
Solution Approach 1:
The patent implements dynamic connection of rectifier branches to charging points through switching devices that can reconfigure the electrical connections in real-time. This allows the system to adaptively assign available rectifier branches to active charging points based on current load conditions, maximizing component utilization while maintaining measurement accuracy through synchronized switching and measurement capture.
2Productivity
If dynamic connection of rectifier branches to charging points is implemented, then utilization of expensive components is increased and required number of identical components is reduced, but measurement accuracy deteriorates
Solution Approach 1:
The patent captures measurement values at the precise moment when switching devices change the connection configuration. By performing the measurement capture immediately before or during the switching event, the system records the energy state before reconfiguration occurs, ensuring accurate attribution of energy measurements to the correct charging operations even as connections dynamically change.
3Measurement precision
If multiple energy meters are used for each rectifier branch, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent employs a single energy meter that serves multiple rectifier branches through time-multiplexed measurement. The energy meter sequentially measures energy from different rectifier branches based on the current connection configuration, with the measured values being timestamped and correlated to specific charging points. This universal measurement approach maintains accuracy while avoiding the complexity of dedicating separate meters to each branch.
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 enables reliable and precise energy measurement and billing, reducing system losses and investment costs, while improving the utilization of charging infrastructure by accurately tracking energy usage at each charging point.
Implementation Method 1
The charging station includes corresponding rectifier branches which may be used to convert an input-side AC voltage or an alternating current into an output-side DC voltage or a direct current
Data Source
AI summary
The present disclosure relates to a charging station for charging electric vehicles. The charging station includes: at least two charging points, which are each connectable to an electric vehicle for charging an electric energy store of the electric vehicle; at least two rectifier branches for providing electrical energy, the rectifier branches being electrically connectable to the charging points and the electrical connection being switchable between at least one of the rectifier branches and the charging points; at least one energy meter for providing meter values which describe the electrical energy provided by the rectifier branches; and at least one meter value acquisition computer configured to determine, for each of the charging points, the amount of the electrical energy provided by the rectifier branches electrically connected to the charging point based on the meter values of the at least one energy meter.