EVSE Coupler Identity Signaling for Cable Capacity Matching
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Solution Overview
Problem
Existing systems for electric vehicles lack a reliable method to communicate the capacity and limitations of electric couplers, leading to potential degradation of power cables when mismatched with the vehicle's output or external load requirements.
Innovation Solution
The integration of a voltage divider circuit, transistor, and circuitry within the electric coupler to identify and communicate its attributes to the vehicle, allowing for adjusted electrical output based on the coupler's operating conditions and limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vehicle provides high power output to external loads, then the productivity and utility of the electric vehicle is improved, but the power cable and electric coupler may become degraded if their capacity is exceeded
Solution Approach 1:
The system performs preliminary identification of the electric coupler's attributes (current capacity, power capacity, voltage capacity) before power transfer begins. The controller receives this identification data and pre-adjusts the power output parameters to match the coupler's capacity, preventing overload conditions before they occur. This proactive approach ensures high productivity while protecting cable and coupler reliability.
Solution Approach 2:
The system establishes a feedback loop where the controller continuously monitors the electric coupler's identified attributes and adjusts the power transfer parameters accordingly. The controller uses the received identification data to regulate power output in real-time, ensuring the power delivered never exceeds the coupler's capacity. This closed-loop control simultaneously maximizes productivity within safe operational limits and ensures reliability by preventing degradation.
2Adaptability or versatility
If different manufacturers produce power cables and electric couplers with different capacities, then the adaptability of the system to various loads is improved, but the complexity of ensuring proper matching increases
Solution Approach 1:
The electric coupler performs self-identification by automatically providing its own attribute data (current capacity, power capacity, voltage capacity) to the vehicle controller. Instead of requiring the vehicle system to actively query or determine coupler capabilities through complex testing, the coupler self-reporting mechanism allows the system to adapt to different manufacturers' products seamlessly. This self-service approach maintains high adaptability while minimizing the complexity of the matching system.
Solution Approach 2:
The identification system is designed to be universal and manufacturer-agnostic, accepting identification data from electric couplers produced by different manufacturers with varying capacities. The controller's ability to receive and process standard identification parameters allows the system to work with any coupler type, whether for high-power grid charging or low-power portable tool charging. This universal interface approach enables broad adaptability without increasing system complexity.
Data Source
AI summary
Methods and systems are provided for communicating operating conditions and operational limitations of an electric coupler that is external of a vehicle to the vehicle. In one example, functionality of a proximity detection circuit is enhanced to double as a serial communications link between a vehicle and an electric coupler.