EV Charging Cost Calculation via SOC and Fee Schedule
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Solution Overview
Problem
Electric vehicle drivers face difficulties in determining the proper charging cost when using a charging station, often paying too little and risking insufficient charge or too much and needing refunds, due to the lack of infrastructure and unclear charging information.
Innovation Solution
An apparatus and method that calculate and display the expected charging cost based on the electric vehicle's battery state of charge and charging station fee schedule, using a combination of storage, communication modules, and display assemblies like head-up displays and beam projectors, to provide users with accurate charging information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If charging station infrastructure is expanded, then charging accessibility is improved, but infrastructure cost increases
Solution Approach 1:
The system enables drivers to autonomously determine charging costs by providing them with calculation tools and data (battery capacity, current SOC, fee schedule) to compute the expected cost themselves, eliminating the need for complex centralized pricing infrastructure and refund mechanisms
Solution Approach 2:
The patent introduces an intermediary calculation system that bridges the driver and charging station by providing fee schedule information and enabling cost computation, serving as a mediator that eliminates direct financial disputes between drivers and charging operators
2Measurement precision
If charging cost calculation system is implemented, then payment accuracy is improved, but system complexity increases
Solution Approach 1:
The system performs preliminary actions by calculating and displaying the expected charging cost before the actual charging process begins, allowing drivers to verify the cost and avoid disputes later, thus improving payment accuracy without requiring complex post-charging verification systems
Solution Approach 2:
The patent implements feedback by continuously providing the driver with charging cost information based on real-time SOC data and fee schedule, enabling the driver to monitor and verify the charging cost throughout the process, thereby improving payment transparency and accuracy
Data Source
AI summary
For informing a user of a current battery SOC (State Of Charge) value (%) and a cost required for a full charging, an apparatus for providing charging information of an electric vehicle includes storage that stores chargeable capacity information of a battery mounted in the electric vehicle, a communication module that receives a charging fee schedule of a charging station, a controller area network (CAN) connection module that acquires charged amount information corresponding to a current SOC value of the battery, a controller that calculates an expected charging cost based on the chargeable capacity information of the battery, the charged amount information corresponding to the current SOC value of the battery, and the charging fee schedule, and a displaying assembly that displays the calculated expected charging cost and the current SOC value of the battery.