WLAN Charging Communication for Dynamic EV Power Transfer
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Solution Overview
Problem
There is a lack of established protocols and message sequencing standards for dynamic wireless power transfer (D-WPT) systems, particularly in communication between electric vehicles and the grid, which hinders the implementation of efficient charging procedures.
Innovation Solution
A charging communication method and device using a wireless local area network (WLAN) for dynamic wireless power transfer (D-WPT) is proposed, which includes setting up communication and sessions for wireless power transfer, determining D-WPT service capabilities, and managing charging sessions based on vehicle positioning and lane changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a static wireless power transfer (S-WPT) system is used, then the charging system is simple and can be commercialized, but it cannot support dynamic charging scenarios where vehicles move during power transfer
Solution Approach 1:
The patent transitions from a static wireless power transfer system to a dynamic wireless power transfer system that can accommodate moving vehicles. The system maintains power transfer capability while the vehicle is in motion by continuously tracking vehicle position and adjusting the power transfer parameters dynamically, thus resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The system performs preliminary actions by establishing communication protocols and message sequencing before the actual dynamic power transfer begins. This includes defining the D-WPT message parameters and communication procedures in advance, which simplifies the overall system implementation by preparing the framework beforehand.
2Reliability
If no message sequencing protocol is established for D-WPT, then implementation is flexible, but communication between the electric vehicle and the grid is inefficient and unreliable
Solution Approach 1:
The patent defines a universal message sequencing protocol for D-WPT that can be applied across different communication scenarios between vehicles and the grid. The protocol handles multiple functions including service discovery, positioning, power transfer control, and session management within a unified framework, improving reliability without requiring separate protocols for each function.
Solution Approach 2:
The communication protocol is segmented into distinct message types and sequencing stages, each handling specific aspects of the D-WPT process. This segmentation allows the system to manage complexity by breaking down the communication process into manageable, standardized components that can be implemented and verified independently.
3Adaptability or versatility
If additional preparatory operations are required for positioning and power supply, then charging compatibility is improved, but the charging procedure becomes more complex and time-consuming
Solution Approach 1:
The system performs preliminary service discovery and positioning operations before the actual power transfer begins. By establishing the communication session and determining vehicle position in advance, the system prepares all necessary parameters beforehand, which streamlines the subsequent power transfer process and reduces overall charging setup time.
Solution Approach 2:
The message sequencing protocol incorporates feedback mechanisms where the vehicle and grid continuously exchange information about positioning, power requirements, and system status. This feedback allows the system to dynamically adjust the charging procedure, improving compatibility with different vehicle types while optimizing the charging setup time through iterative refinement.
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 efficient communication and charging procedures for electric vehicles using D-WPT, ensuring seamless power transfer and adaptability to changing vehicle positions and services, thereby enhancing the reliability and convenience of electric vehicle charging.
Implementation Method 1
a reception pad of a vehicle assembly (VA) mounted on the electric vehicle may form an inductive resonance coupling with a transmission pad of a ground assembly (GA) installed at a charging station
Data Source
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AI summary
A charging communication method for charging an electric vehicle, comprises the steps of: performing a communication setup and a session setup for wireless power transfer between an SECC and an EVCC; performing a charging communication session for dynamic wireless power transfer (D-WPT) between the SECC and the EVCC; and performing a charging session by means of dynamic wireless power transfer between the SECC and the EVCC.