EV Charging Control Using Parking Time and Renewable Self-Consumption
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Solution Overview
Problem
It is difficult for users of electric vehicles to consistently charge their vehicles with electricity generated using renewable energy, as the source of electricity in parking lots is not always renewable.
Innovation Solution
A control method that estimates the charged amount of electricity used to charge electric vehicles based on parking duration and self-consumption of renewable energy, allowing easy association of an environmental credit with the charged amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If charging infrastructure uses conventional power sources, then charging availability is improved, but environmental credit is lost
Solution Approach 1:
The system performs preliminary actions by calculating the charged amount based on parking duration before the actual charging occurs. The server stores parking start/end times and calculates the charged amount in advance, ensuring that environmental credit information is ready when charging completes, thus maintaining both charging availability and environmental credit reliability.
Solution Approach 2:
The server acts as an intermediary between the charging infrastructure and the environmental credit verification system. It receives parking information from terminals, calculates charged amounts, determines environmental credit status by comparing with renewable energy consumption, and outputs verification information without requiring direct measurement mechanisms at the charger, thus resolving the contradiction between charging availability and environmental credit reliability.
2Measurement precision
If chargers are equipped with measurement mechanisms, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The measurement and calculation functions are extracted from the charger hardware and relocated to the server system. The server performs all charged amount calculations based on parking duration data, eliminating the need for complex measurement mechanisms in chargers. This reduces charger device complexity while maintaining measurement precision through centralized server-based calculations.
Solution Approach 2:
The system uses self-service by leveraging existing parking management data (parking start/end times) to calculate charged amounts without requiring additional measurement infrastructure. The terminal automatically provides parking information, and the server autonomously calculates the charged amount and determines environmental credit status, eliminating the need for complex charger-based measurement systems.
3Measurement precision
If renewable energy self-consumption is tracked, then environmental credit accuracy is improved, but information processing complexity increases
Solution Approach 1:
The server performs multiple functions using a single information processing system: it manages parking information, calculates charged amounts based on parking duration, tracks renewable energy self-consumption, determines environmental credit status, and outputs verification information. This multi-functional approach improves environmental credit accuracy without proportionally increasing information processing complexity, as all functions are integrated in one server.
Data Source
AI summary
A control method includes: obtaining first parking time information including a first parking duration of one or more first vehicles in a first facility, the one or more first vehicles each running on electricity in a battery of the first vehicle; estimating a first charged amount of the one or more first vehicles charged from a first charger provided in the first facility based on the first parking time information obtained; obtaining a first amount of self-consumption of renewable energy that has been consumed in the first facility; and outputting information indicating whether the first charged amount of electricity has been generated using renewable energy based on the first charged amount estimated and the first amount of self-consumption obtained.