EV Charger Search Using Route-Based Power Estimation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional charging station selection methods fail to ensure electric vehicles arrive at their destination without power shortages and often result in prolonged charging times, especially in emergency situations like disasters, leading to delays in power supply.
Innovation Solution
A charger search device that divides the travel route into sections based on speed change prediction points, estimates power consumption accurately, and searches for chargers using a charger search unit to ensure sufficient power is available, minimizing charging time and ensuring arrival without power shortages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional charging station selection methods are used, then charging stations can be found, but electric vehicles may arrive at destination with power shortages and charging times are prolonged
Solution Approach 1:
The system performs preliminary power consumption estimation by dividing the travel route into sections and calculating required supplemental power amounts before charging. This allows the charger search to target specific charging stations that can provide the exact needed power amount, avoiding unnecessary charging stops and ensuring sufficient power reaches the destination.
Solution Approach 2:
The patent replaces conventional trial-and-error charging station selection with a calculation-based system that uses speed models, power consumption estimation, and supplemental power amount calculation to deterministically identify the optimal charger, reducing both time and reliability uncertainties.
2Measurement precision
If route is divided into many sections for accurate power estimation, then power consumption accuracy improves, but calculation complexity increases
Solution Approach 1:
The travel route is divided into multiple sections with speed change prediction points as boundaries. Each section has its own speed model, allowing accurate power consumption estimation for each segment. The segmentation enables precise tracking of power needs at different route portions without requiring overly complex continuous modeling.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A charger search device includes: a required supplemental power amount calculation unit that calculates, based on an amount of remaining power of a battery at a first point, and power consumption, a required supplemental power amount that is an amount of power expected to be insufficient when an electric vehicle equipped with the battery travels on a first route that is composed of a road link on which the electric vehicle is planned to travel from the first point to a second point; a chargeable power amount estimation unit that estimates, based on the power consumption, a chargeable power amount to the battery at a time point when the electric vehicle passes through a speed change prediction point at which a change in a travel speed of the electric vehicle on the first route is expected; a planned charge amount calculation unit that calculates a planned charge amount to the battery, based on the required supplemental power amount and a predetermined margin; and a charger search unit that searches for a charger capable of charging the battery, based on the chargeable power amount and the planned charge amount.