EV Charging Controller Timing Based on User Arrival
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Solution Overview
Problem
Existing power control devices for vehicles may not ensure sufficient charge levels in the power storage device when the user arrives, potentially leading to reduced traveling distance due to premature depletion of charge, while also risking battery deterioration from prolonged full charge states.
Innovation Solution
A power control device that calculates the user's traveling speed based on location history and starts charging the power storage device when the difference between the calculated traveling time and charging time becomes less than a predetermined value, ensuring sufficient charge is available upon the user's arrival, while minimizing battery deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If charging is started early to ensure sufficient charge when user arrives, then the charge level is sufficient, but the power storage device remains at full charge level for long period causing deterioration
Solution Approach 1:
The system performs preliminary calculation of user's arrival time based on location history and traveling speed, then schedules charging to start in advance such that charging completes exactly when user arrives. This ensures sufficient charge without prolonged full charge state.
Solution Approach 2:
The charging start time is dynamically adjusted based on real-time user location data and calculated traveling speed. The system continuously monitors user movement and modifies charging timing to ensure completion at the predicted arrival moment, adapting to varying travel conditions.
2Duration of action of stationary object
If charging is delayed to avoid prolonged full charge state, then battery deterioration is suppressed, but the charge level may be insufficient when user arrives
Solution Approach 1:
The system uses feedback from user location information and traveling speed calculations to determine the optimal charging start time. By continuously monitoring user movement and adjusting charging timing accordingly, the system ensures charging completes at the precise moment of user arrival, avoiding both premature depletion and prolonged full charge states.
3Measurement precision
If user location monitoring is enhanced to improve arrival time prediction accuracy, then charging timing precision improves, but device complexity increases
Solution Approach 1:
The system leverages the user's own communication terminal to perform location monitoring and traveling speed calculation. By utilizing resources already available in the user's device rather than requiring additional vehicle-mounted sensors and processing equipment, the system achieves accurate arrival time prediction without significantly increasing vehicle system complexity.
Data Source
AI summary
A vehicle includes: a power storage device configured to be charged using a power supply facility external to a vehicle; a communication device configured to obtain information indicating a user location Pu, from a user terminal carried by a user; and a vehicle ECU. In a charging standby state for the charging of the power storage device using the power supply facility, the vehicle ECU calculates a user traveling speed Vu and a user distance Du using user location Pu, and calculates a traveling time Tu required for the user to arrive at the vehicle using user traveling speed Vu and user distance Du. The vehicle ECU starts the charging of the power storage device when a value obtained by subtracting (i) a charging time Tc required to complete the charging of the power storage device from (ii) traveling time Tu becomes less than a predetermined value.