EV Charging IP Communication Unique Association
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Solution Overview
Problem
The existing IP-based communications connections between electric vehicles and charging stations face challenges due to strong crosstalk effects, leading to non-unique assignment issues, especially with PLC communication, which results in unreliable data transmission and incorrect association of electric vehicles with charging stations.
Innovation Solution
A method is developed to establish a unique IP-based communications connection by using a first communications connection for identification and a second communications connection for IP-based communication, ensuring the electric vehicle is associated with the correct charging control unit through mechanisms like pulse width modulation and PLC technology, with mechanisms such as DHCP and Neighbor Discovery for address allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PLC communication is used for IP-based communication between electric vehicle and charging station, then broadband information transmission is enabled, but strong crosstalk effects occur leading to non-unique assignment of electric vehicle to charging station
Solution Approach 1:
The patent segments the communication process into two distinct phases: first establishing a unique association between the electric vehicle and charging station through basic signaling, then using IP-based communication only after the unique assignment is confirmed. This segmentation prevents crosstalk from causing incorrect associations by separating the identification phase from the data transmission phase.
Solution Approach 2:
The patent performs preliminary action by establishing the unique association between electric vehicle and charging station before initiating IP-based communication. The basic signaling phase precedes and prepares the communication channel, ensuring that when IP communication begins, the correct pairing is already established and protected against crosstalk interference.
2Productivity
If a shared medium is used for communication, then parallel communication by multiple electric vehicles and charging control units is enabled, but correct association between specific vehicle and charging control unit cannot be ensured
Solution Approach 1:
The patent implements feedback mechanisms where the electric vehicle and charging station continuously exchange identification information and status signals through the basic signaling channel. This feedback ensures that even in a shared medium environment, each participant can verify its correct association partner, preventing information loss about pairings while maintaining parallel communication capabilities.
Solution Approach 2:
The patent introduces an intermediary identification mechanism that acts as a mediator between the shared medium communication and the specific vehicle-charging station pairing. This intermediary layer of basic signaling provides a dedicated channel for maintaining association information, separating it from the shared IP-based communication medium.
3Reliability
If basic signaling is established first before IP communication, then unique association is ensured, but communication setup time is increased
Solution Approach 1:
The patent employs periodic action by implementing continuous monitoring and verification signals during the basic signaling phase. Rather than a single lengthy setup process, the association establishment occurs through periodic exchange of identification and status signals, which can be performed rapidly and repeatedly to confirm the unique pairing before IP communication begins, reducing overall setup time while maintaining reliability.
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 method ensures a unique association between the electric vehicle and the charging control unit, enabling reliable IP-based communication and preventing incorrect invoicing by ensuring the electric vehicle is connected to the correct charging station, while also enhancing security through encryption and verification.
Implementation Method 1
Fundamental signaling for controlling charging between a charging station and an electric vehicle on the basis of pulse width modulation is described within the scope of Part 1 of the ISO/IEC 61851 standard
Implementation Method 2
work is also being carried out on a communications connection based on PLC technology (PLC=Power Line Communication) within the scope of the development of the further ISO/IEC 15118 standard
Data Source
AI summary
A method establishes an IP-based communications connection between an electric vehicle and a charge control unit associated with a charging station assigned an IP address. The electric vehicle is connected to the charging station via a charging cable and/or an inductive charge coupling for charging and/or discharging. A first communication connection that can be used exclusively by the electric vehicle and the charging station is provided via the charging cable and/or the inductive charging coupling. The electric vehicle having the charging control unit and the charging infrastructure can communicate via a second communications connection that can be used in parallel by other electric vehicles and charge control units. An identification is provided to the electric vehicle and the charging control unit. An IP-based communication is established between the electric vehicle and the charging control unit, using the IP address.