EV Charging Emissions Calculation by Power Source Proportion
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Solution Overview
Problem
Existing methods fail to accurately calculate carbon dioxide emissions from electric vehicles due to uncertainty about the source of electricity used for charging, which affects the accuracy of emission calculations during travel.
Innovation Solution
An emissions calculation method and system that tracks the proportion of renewable and grid electricity used for charging an electric vehicle's battery, utilizing emission coefficients specific to each energy source to calculate carbon dioxide emissions accurately, considering both charging and travel electricity consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the amount of electricity used for charging is multiplied by a fixed CO2 emission coefficient to calculate emissions, then the calculation process is simple, but the accuracy of carbon dioxide emissions calculation deteriorates because the electricity source (renewable vs. grid) is not distinguished
Solution Approach 1:
The patent segments the electricity source into two distinct categories: renewable energy (first electricity) and grid electricity (second electricity). By tracking the proportion of each source used for charging through charge information, the system calculates emissions separately for each electricity type using appropriate emission coefficients, thereby resolving the contradiction between calculation simplicity and accuracy.
2Measurement precision
If the electricity source for charging is tracked and differentiated, then the accuracy of carbon dioxide emissions calculation is improved, but the device complexity increases due to additional tracking and calculation components
Solution Approach 1:
The patent introduces a management system as an intermediary that handles the complex tracking and calculation tasks. This management system receives charge information from the electric vehicle, determines the proportion of renewable versus grid electricity used, and performs the differentiated emissions calculation. By offloading these functions to a dedicated management system, the complexity is contained and organized rather than distributed across multiple components.
Data Source
AI summary
An emissions calculation method includes obtaining charge information. Charge information relates to charging a storage battery of an electric vehicle with first electricity derived from renewable energy, and charging the storage battery with second electricity derived from grid electricity. The method further includes calculating a proportion based on the charge information. The proportion is an amount of electricity used for the charge with the first electricity out of an amount of electricity used for charging the storage battery. The method further includes calculating an amount of carbon dioxide emissions from the electric vehicle based on the proportion, a first emission coefficient, and a second emission coefficient. The first emission coefficient is an emission coefficient of carbon dioxide related to the renewable energy. The second emission coefficient is an emission coefficient of carbon dioxide related to the grid electricity. The method further includes outputting the amount of carbon dioxide emissions.