EV Charging Station Association via Signal Attenuation
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Solution Overview
Problem
Electric vehicles face challenges in efficiently and securely associating with appropriate charging stations in a facility, as existing methods lack effective mechanisms for identifying the correct station based on attenuation levels and ensuring secure communication.
Innovation Solution
A method involving multi-network broadcast messages that transmit security information and communication parameters, allowing electric vehicles to determine the best charging station based on attenuation information and establish secure associations with EVSE stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional power outlet charging methods are used, then charging can be performed, but the process lacks efficient station identification and secure communication mechanisms
Solution Approach 1:
The patent implements preliminary actions by having the client network device transmit multi-network broadcast messages containing security information and communication parameters before actual charging occurs. The EVSE station receives and validates these parameters in advance, including attenuation information measurement, establishing security credentials and communication protocols before the charging transaction begins. This preliminary setup ensures reliable and secure charging while simplifying the actual charging process.
2Ease of operation
If signal strength based association is used, then station selection can be performed, but secure communication and authorization are not ensured
Solution Approach 1:
The patent merges multiple functions into the association process: signal strength measurement for station selection, attenuation information validation for security, and authorization verification. The EVSE station combines these elements by receiving broadcast messages that include both communication parameters and security information, then validating both aspects simultaneously. This unified approach maintains ease of operation while ensuring communication security through integrated validation mechanisms.
3Reliability
If multi-network broadcast messages with security information are transmitted, then secure association is achieved, but communication overhead increases
Solution Approach 1:
The patent applies partial action by transmitting security information and communication parameters only when needed during the association process, not continuously. The multi-network broadcast messages are sent selectively to establish secure connections, and the EVSE station validates these parameters once during association rather than continuously verifying them throughout charging. This reduces communication energy overhead while maintaining association security.
Data Source
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AI summary
An electric vehicle can be configured to execute an association procedure with one or more charging stations in a charging facility to securely connect to and receive electric power from one of the charging stations. The electric vehicle can broadcast one or more service matching messages to the charging stations and, in response, can receive attenuation information from one or more of the charging stations. The electric vehicle can analyze the attenuation information received from the charging stations to identify with which charging station the electric vehicle should associate (e.g., to determine which charging station should provide electric power to the electric vehicle). The electric vehicle can then associate with (and receive electric power from) the identified charging station.