Signal Matching Device for EV Charging Protocol Conversion
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Solution Overview
Problem
The existing systems for charging electric vehicles require complex and costly charging stations with multiple modems and routers to facilitate communication between the vehicle and the charging network, which is inefficient and violates EMC regulations due to direct power line communication limitations.
Innovation Solution
A device with a signal matching system using coupling transformers and amplifiers to match signal levels between the vehicle's data transmission device operating on a first protocol and the communication network's data transmission device operating on a second protocol, eliminating the need for intermediate routers or bridges and allowing seamless communication without EMC disturbances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct power line communication is used between vehicle and charging station, then communication can be established, but EMC regulations are violated and signal interference occurs
Solution Approach 1:
The patent introduces an intermediary communication device (gateway/router) that mediates between the vehicle's data transmission device and the communication network. This intermediary converts signals from the first protocol to the second protocol, enabling communication while preventing direct power line communication that would cause EMC disturbances. The intermediary acts as a buffer that isolates the vehicle from electromagnetic interference while maintaining data transmission capability.
2Adaptability or versatility
If multiple modems and routers are used in charging station, then communication compatibility is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements a universal communication device that can handle multiple communication protocols (first protocol from vehicle, second protocol from network) within a single integrated unit. This multi-functional device eliminates the need for separate modems and routers for different protocols, reducing device complexity while maintaining protocol compatibility. The single device performs signal conversion, protocol translation, and network routing functions that would otherwise require multiple specialized components.
3Productivity
If signal level matching is implemented between different protocols, then communication efficiency is improved, but additional signal matching devices are required
Solution Approach 1:
The patent combines signal level matching functionality with the intermediary communication device, merging multiple functions (protocol conversion, signal level matching, EMC filtering) into a single integrated unit. This consolidation achieves efficient data transmission with bidirectional signal level adaptation while avoiding the need for separate signal matching devices. The unified device reduces overall system complexity compared to having dedicated signal matching components in addition to protocol converters.
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 simplifies the charging station design by eliminating the need for additional modems and routers, ensuring efficient and EMC-compliant bidirectional communication with reduced signal interference, enabling high-bandwidth data transmission for both charging and value-added services.
Implementation Method 1
a signal matching device with at least one first coupling transformer which, via respective coils, couples a data transmission device of a charging station with the data transmission devices of the vehicle and of the communication network with one another
Data Source
AI summary
A device for transmitting data between a data transmission device of a vehicle and a data transmission device of a communications network, as part of a charging process of an electrical energy store of the vehicle, is disclosed. The vehicle data transmission device is based on a first communications protocol with a first signal level, while the communications network data transmission device is based on a second communications protocol with a second signal level. The device includes a signal-matching device having at least one first coupling transformer, which couples a data transmission device of a charging station to the data transmission devices of the vehicle and of the communications network via respective coils. The signal-matching device is configured to match the first signal level to the second signal level and vice versa.