Mixed-Level EVSE Power Allocation With Current Overage Protection
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Solution Overview
Problem
Conventional electric vehicle supply equipment (EVSE) units are limited in their compatibility and intelligent charging capabilities, forcing users to choose between faster but less versatile Level 2 units or slower but more versatile Level 1 units.
Innovation Solution
The development of a mixed-level EVSE unit that combines the capabilities of both Level 1 and Level 2 units, featuring a Level 2 charge handle and a Level 1 outlet, along with intelligent charging logic and relay sections, current sensors, and a current overage protection unit to ensure safe and efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If Level 2 EVSE unit is used, then charging speed is improved, but compatibility with various electric vehicles deteriorates
Solution Approach 1:
The EVSE unit is designed to provide multiple charging levels (Level 1 and Level 2) within a single device, enabling it to serve both high-speed charging needs and broad compatibility requirements. The system includes a Level 2 charge handle with receptacle and a Level 1 outlet, allowing different vehicle types to be charged appropriately.
Solution Approach 2:
The EVSE unit is divided into distinct functional components: a Level 2 charging section with charge handle and receptacle, and a Level 1 outlet section. This segmentation allows each component to operate independently at its optimal performance level while contributing to the overall system versatility.
2Adaptability or versatility
If Level 1 EVSE unit is used, then compatibility with various electric vehicles is improved, but charging speed deteriorates
Solution Approach 1:
The EVSE unit provides multiple charging levels (Level 1 and Level 2) within a single device, enabling it to serve both broad compatibility needs and high-speed charging requirements. The system includes a Level 2 charge handle with receptacle and a Level 1 outlet, allowing different vehicle types to be charged appropriately.
3Adaptability or versatility
If mixed-level EVSE unit is used, then compatibility and charging options are improved, but device complexity increases
Solution Approach 1:
The patent combines Level 1 and Level 2 charging capabilities into a single EVSE unit, integrating multiple functions (Level 2 charge handle, Level 2 receptacle, Level 1 outlet) into one device. This merging provides versatility while consolidating what would otherwise require separate units.
4Productivity
If intelligent charging capabilities are added, then charging efficiency is improved, but device complexity increases
Solution Approach 1:
The EVSE unit includes a current sensor that monitors current flow and provides feedback to the charging logic and relay section. This feedback mechanism enables intelligent charging capabilities by allowing the system to adjust charging parameters based on real-time conditions, optimizing charging efficiency while maintaining manageable complexity through targeted sensor integration.
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.