Vehicle Charging Control for Temperature-Aware Time Prediction
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Solution Overview
Problem
Existing vehicle charging systems face inaccuracies in predicting charging time due to temporary pauses in external charging caused by electric device temperature thresholds, leading to discrepancies between predicted and actual charging times.
Innovation Solution
Incorporating an electric-device temperature acquisition unit and a predicted charging time deriving unit that pauses and resumes power supply based on temperature thresholds, and extends the predicted charging time by a travel-preparation period if the expected temperature at completion is above a certain threshold, accounting for the pause and recharging times to improve prediction accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If external charging is paused when electric device temperature reaches the first threshold, then electric device temperature control is improved, but charging time prediction accuracy deteriorates
Solution Approach 1:
The system performs preliminary actions by predicting pause events before they occur during charging. The predicted charging time deriving unit calculates expected pause times based on temperature thresholds and charging rates, allowing the system to compensate for future pauses in advance, thereby maintaining prediction accuracy despite temperature-induced interruptions.
Solution Approach 2:
The system introduces feedback mechanisms where the actual temperature measurements and pause events are continuously monitored and fed back to adjust the predicted charging time. This feedback loop allows the system to learn from actual pause patterns and improve the accuracy of future charging time predictions while maintaining safe temperature control.
2Productivity
If charging continues without pause despite high electric device temperature, then charging speed is improved, but electric device safety deteriorates
Solution Approach 1:
The system implements periodic action by introducing controlled pause intervals when temperature thresholds are reached. Instead of continuous charging, the system periodically interrupts charging to allow temperature reduction, then resumes charging when safe. This periodic on-off pattern maintains both safety and reasonable charging speed by preventing dangerous temperature accumulation.
Solution Approach 2:
The system applies preliminary anti-action by proactively pausing charging before dangerous temperature levels are reached. The first threshold acts as a preventive measure, stopping charging in advance to prevent overheating, while the second threshold allows resumption when temperatures have sufficiently reduced, balancing safety with charging efficiency.
3Device complexity
If predicted charging time does not account for pause time, then prediction simplicity is improved, but actual charging time accuracy deteriorates
Solution Approach 1:
The system applies self-service by automatically calculating and adjusting predicted charging time based on its own temperature monitoring data and charging parameters. The predicted charging time deriving unit uses the device's own operational characteristics (charging rate, temperature thresholds, thermal properties) to compute pause times and adjust predictions, making the system self-sufficient and accurate without external intervention.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances the accuracy of charging time prediction by considering temperature-induced pauses and travel preparation times, preventing performance limitations and ensuring safe operation by avoiding excessive electric device temperatures during travel.
Implementation Method 1
an electric-device temperature acquisition unit that acquires a temperature of an electric device disposed in a current path for external charging
Implementation Method 2
a charging controller that pauses a supply of electric power to the battery in response to the temperature of the electric device becoming greater than or equal to a first threshold during the external charging
Data Source
AI summary
A vehicle includes an electric-device temperature acquisition unit, a charging controller, and a predicted charging time deriving unit. The electric-device temperature acquisition unit acquires a temperature of an electric device disposed in a current path for external charging for supplying electric power from a power supply external to the vehicle to a battery mounted in the vehicle. The charging controller pauses a supply of electric power to the battery in response to the temperature of the electric device becoming greater than or equal to a first threshold during the external charging, and resumes the supply of electric power to the battery in response to the temperature of the electric device becoming less than a second threshold lower than the first threshold. The predicted charging time deriving unit derives a predicted charging time predicted to be taken for the external charging in accordance with an instruction for the external charging.