EV Charging Control Pilot Signaling for Dynamic Phase Switching
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Solution Overview
Problem
Existing electric vehicle charging systems lack the ability to efficiently optimize charging processes based on specific vehicle requirements and available power sources, leading to suboptimal charging times and complexities in communication between charging apparatus and vehicles.
Innovation Solution
A charging apparatus that utilizes a control pilot pin to transmit PWM control signals encoding available power sources and charging phases to the vehicle, allowing for bidirectional communication and dynamic adjustment of charging parameters, such as AC phase switching and energy level management, to optimize the charging process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a control pilot pin is used to transmit PWM control signals for communication between charging apparatus and vehicle, then communication complexity is reduced and robustness against environmental influences is enhanced, but the ability to provide detailed charging control information may be limited
Solution Approach 1:
The control pilot pin is designed to serve multiple functions: it transmits PWM control signals for communication, encodes available power source information, and provides bidirectional communication capability. This multi-functionality reduces the need for separate communication channels while maintaining comprehensive charging control information exchange between the charging apparatus and vehicle controller.
2Productivity
If PWM control pilot signals are used to encode available power sources and charging phases, then communication efficiency is improved and charging optimization is enabled, but signal encoding complexity increases
Solution Approach 1:
The system utilizes PWM signal parameter modulation (duty cycle, frequency, or voltage level) to encode multiple pieces of information including available power sources and charging phases. By varying signal parameters rather than using separate signal lines, the system achieves efficient information transmission with reduced hardware complexity.
3Adaptability or versatility
If bidirectional communication is implemented through the control pilot pin, then charging process optimization based on vehicle requirements is improved, but communication protocol complexity increases
Solution Approach 1:
The bidirectional communication through the control pilot pin implements a feedback mechanism where the vehicle controller provides information about its charging requirements and state of charge, and the charging apparatus responds by adjusting available power source information and charging parameters. This feedback loop enables optimized charging processes while using a standardized communication protocol.
Data Source
AI summary
A charging apparatus for charging a vehicle battery of an electric vehicle includes a connector having a control pilot pin used by a charging controller of said charging apparatus to control a charging of the vehicle battery of an electric vehicle connected via a charging cable to said charging apparatus. The charging controller is adapted to transmit via the control pilot pin a PWM control pilot signal encoding available power sources of said charging apparatus to a vehicle charging controller of the electric vehicle, apply switch control signals to one or more relays to switch AC charging phases supplied by an inverter of the charging apparatus via AC phase or photovoltaic panel DC supply lines and send information by changing the PWM voltage level on the control pilot pin to indicate which AC charging phases are available for charging the vehicle battery to the vehicle charging controller to trigger a soft switching on the concerned AC charging phases.