Mixed-Level EVSE with Intelligent Power Allocation
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Solution Overview
Problem
Conventional electric vehicle supply equipment (EVSE) units are limited in versatility and intelligence, forcing users to choose between faster but less versatile Level 2 units or slower but more versatile Level 1 units, and neither provides significant intelligent charging capabilities, failing to efficiently distribute energy to a wide range of electric vehicles and non-electric vehicle devices.
Innovation Solution
A mixed-level EVSE unit that combines components and capabilities of both Level 1 and Level 2 units, including a Level 2 charge handle and a Level 1 outlet, with integrated power meters, a charging logic and relay section, and a current overage protection unit, allowing for intelligent power management and simultaneous charging of multiple devices using RFID detection and learning logic to optimize charging based on heuristics and situational information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If Level 2 EVSE units are used, then charging speed is improved, but versatility is reduced
Solution Approach 1:
The EVSE unit is designed to provide multiple charging levels (Level 1 and Level 2) and support various charging configurations within a single device. The system can dynamically switch between 120V single-phase and 240V split-phase outputs, and can charge multiple devices simultaneously with different power requirements, making it universally applicable to diverse electric vehicles and non-vehicle devices.
2Adaptability or versatility
If Level 1 EVSE units are used, then versatility is improved, but charging speed is reduced
Solution Approach 1:
The EVSE unit dynamically adjusts its output based on real-time conditions including connected device type, power availability, and charging stage. The system can switch between 120V and 240V outputs, adjust current levels from 16A to 80A, and prioritize power distribution among multiple devices, providing adaptive charging that optimizes both speed and versatility.
3Device complexity
If conventional EVSE units are used, then device complexity is reduced, but intelligent charging capability is reduced
Solution Approach 1:
The EVSE unit incorporates RFID detection, learning logic, and heuristics-based control that continuously monitor charging conditions, device identification, and power consumption patterns. The system uses this feedback to automatically adjust charging parameters, prioritize devices, and optimize power distribution without requiring complex user intervention or external control systems.
4Productivity
If multiple devices are charged simultaneously, then energy distribution efficiency is improved, but current overage risk increases
Solution Approach 1:
The EVSE unit is designed with built-in current overage protection that allows it to safely operate at or slightly above its rated capacity when conditions permit. The learning logic and heuristics monitor real-time current draw and can temporarily exceed standard ratings during peak demand periods or when multiple devices are charged, while maintaining long-term reliability through protective mechanisms.
Data Source
AI summary
Embodiments include an EVSE unit having a Level 2 or Level 3 charge handle, a receptacle configured to receive the Level 2 charge handle, and a current overage protection unit. The EVSE unit can include a Level 1 outlet including one or more plug outlets configured to receive one or more corresponding Level 1 plugs. A first power meter associated with the Level 2 charge handle can meter power delivered via the Level 2 charge handle. A second power meter associated with the Level 1 outlet can meter power delivered via the Level 1 outlet. A charging logic and relay section can intelligently allocate power between the Level 2 handle and the Level 1 outlet according to charging rules. The current overage protection unit can ensure compliance with local ordinances and protect internal components of the EVSE unit.