EV Charging Station Identification via Pilot Line Signal Analysis
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Solution Overview
Problem
There is no universal method to uniquely identify and associate electric vehicles with charging stations, especially in environments with limited or no digital communication, such as underground parking lots, where GPS positioning is insufficient due to signal shielding.
Innovation Solution
A system that uses a charging electronics unit to detect physical parameters of the charging station via a pilot line and charging current lines, combining these with location data from a GPS-based navigation system to create a characterization data set for each charging point, allowing vehicles to identify and adapt to specific charging stations, and enabling data exchange between vehicles for intelligent charging strategies and billing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS-based positioning is used to identify charging stations, then location data can be obtained, but GPS signal is shielded in underground parking lots making positioning insufficient
Solution Approach 1:
The patent introduces an intermediary identification system that uses the pilot line as a communication medium to transmit charging station identification data. Instead of relying directly on GPS signals that are blocked by underground structures, the system uses the existing electrical pilot line as a mediator to carry identification information from the charging station to the vehicle, thereby overcoming the signal shielding problem.
2Loss of information
If digital data communication via power line communication is implemented, then vehicle authentication and data exchange are enabled, but device complexity increases
Solution Approach 1:
The patent makes the existing pilot line serve multiple functions: it continues to provide its traditional control functions for charging initiation and termination, while simultaneously serving as a communication channel for transmitting identification data and authentication information. This multi-functional use of the pilot line enables data communication without adding separate dedicated communication infrastructure, thereby reducing overall system complexity.
3Reliability
If physical parameters of pilot signal and power supply network are detected to create characterization data set, then unique identification of charging stations is achieved, but measurement and detection difficulty increases
Solution Approach 1:
The system utilizes the existing electrical parameters of the power supply network and pilot signal that are already present and measurable during normal charging operations. The charging electronics unit in the vehicle automatically detects and processes these parameters (such as voltage, current, frequency characteristics) to generate the characterization data set, without requiring external measurement equipment or additional sensing infrastructure. The system serves itself by using the operational electrical signals for identification purposes.
Data Source
AI summary
A system includes a power withdrawal point on a power supply network and a vehicle for the corded charging of a traction battery at the power withdrawal point. The vehicle includes a charging electronics unit for charging, and is electrically connectable to the vehicle-external power withdrawal point via a charging cable. The charging cable is configured as a cable connected outside the vehicle to a station charging device for a charging process, or as a cable charging device. The station charging device or the cable charging device, respectively, is electrically connected to the power withdrawal point when a charging connection has been established, and the power withdrawal point can supply an alternating current respectively via the station charging device or via the cable charging device for charging. The station charging device or the cable charging device, respectively, is electrically connected to the charging electronics unit via a pilot line when the charging connection has been established, where the charging process is controllable by an electric pilot signal applied via the pilot line. The charging electronics unit detects physical parameters of the pilot signal via the pilot line, physical parameters of the power supply network at the power withdrawal point via the charging current lines, and physical parameters of the station charging device or of the cable charging device via the pilot line, respectively, during a charging process so as to produce a parameter data set characterizing the power withdrawal point.