EV Charging Emission Tracking Using Charge History Assignment
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Solution Overview
Problem
Existing methods for calculating CO2 emission amounts in electric vehicles are not accurate, failing to account for varying emission rates based on different power generation sources and usage patterns.
Innovation Solution
An emission amount management device that includes a first obtainer to gather charge information with CO2 emission amounts per unit electric power, a second obtainer to collect discharge information during travel, and a manager to assign and calculate CO2 emission amounts based on historical data, ensuring precise calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple CO2 emission calculation method is used, then the calculation process is simple, but the calculation accuracy is low
Solution Approach 1:
The system performs preliminary actions by storing charge information including CO2 emission amounts per unit electric power and charge electric power amounts in advance. When calculating CO2 emissions for traveling, the manager references this pre-stored history information to accurately match the discharge electric power amount with corresponding charge information, ensuring high calculation accuracy without complex real-time measurements.
Solution Approach 2:
The system creates a copy of charge information (CO2 emission amount per unit electric power and charge electric power amount) and stores it in history information. During traveling, the manager uses this copied data to calculate CO2 emissions by matching the discharge electric power amount with the stored charge information, enabling accurate calculation without requiring complex real-time power generation source identification.
2Measurement precision
If detailed history information is stored for accurate calculation, then CO2 emission calculation accuracy is improved, but device complexity increases
Solution Approach 1:
The charge information is segmented into distinct components: CO2 emission amount per unit electric power amount and charge electric power amount. This segmentation allows the manager to efficiently store and retrieve only the necessary data elements when calculating CO2 emissions for traveling, reducing unnecessary data management complexity while maintaining calculation accuracy.
Solution Approach 2:
The history information structure is designed to be universal, storing both CO2 emission amount per unit electric power and charge electric power amount together. This multi-functional storage approach allows the same data structure to serve multiple purposes: calculating CO2 emissions for traveling, tracking charge patterns, and analyzing power consumption, thereby reducing overall system complexity through data consolidation.
3Reliability
If CO2 emission amounts are calculated for all charging scenarios, then comprehensive emission management is achieved, but information processing volume increases
Solution Approach 1:
The system extracts only the essential information needed for CO2 emission calculation: CO2 emission amount per unit electric power amount and charge electric power amount. By taking out and storing only these critical elements in history information, the system achieves comprehensive emission management for all charging scenarios while minimizing data processing load by excluding unnecessary information.
Data Source
AI summary
An emission amount management device includes: a first obtainer that obtains charge information including information indicating a carbon dioxide emission amount per unit electric power amount of electric power with which an electric vehicle is charged and a charge electric power amount; a second obtainer that obtains first discharge information including a first discharge electric power amount consumed by the electric vehicle during traveling; and a manager that selects, from charge history information including a history of the carbon dioxide emission amount per unit electric power amount and the charge electric power amount, the carbon dioxide emission amount per unit electric power amount and the charge electric power amount to be assigned to the first discharge electric power amount, and calculates a carbon dioxide emission amount from the carbon dioxide emission amount per unit electric power amount selected and the first discharge electric power amount.