Vehicle Backup Power Notification Thresholds
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Solution Overview
Problem
Existing vehicle control systems fail to adequately notify users and external parties when a vehicle is likely to stop due to a backup power supply shortage, leading to user unease and potential safety concerns.
Innovation Solution
A control device with a controller that executes advanced notifications: a first notification inside the vehicle when the backup power supply's charge level reaches a first threshold, and a second notification outside the vehicle when it reaches a lower second threshold, to alert of impending stoppage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If notification is executed only when the remaining charge level reaches the lower limit and the vehicle stops, then the system complexity is reduced, but the user experience deteriorates due to sudden stoppage causing uneasiness
Solution Approach 1:
The notification system performs preliminary actions by notifying the user in advance when the remaining charge level reaches the first threshold value, before the vehicle actually stops. This allows the user to prepare for the upcoming stoppage, reducing uneasiness and improving user experience while maintaining a relatively simple notification system structure.
2Reliability
If the vehicle executes retreat travel using the backup power supply, then the reliability of the power supply system is improved, but the loss of time increases due to the extended duration of retreat travel
Solution Approach 1:
The notification system executes preliminary notification before the backup power supply is depleted, providing advance warning to the user about the upcoming stoppage. This allows the user to take appropriate actions (such as positioning the vehicle safely or preparing for towing) before the retreat travel must be aborted, thereby reducing the overall time loss while maintaining power supply reliability throughout the retreat travel period.
Data Source
AI summary
A control device includes: a controller mounted on a vehicle having an autonomous driving function and configured to execute fail-safe control by a backup power supply when a main power supply fails. The controller is configured to: in the fail-safe control, when a remaining charge level of the backup power supply decreases to or below a first threshold set in advance, execute a first notification to notify in advance an inside of the vehicle that the vehicle is likely to stop due to a shortage of the remaining charge level of the backup power supply; and when the remaining charge level of the backup power supply decreases to or below a second threshold that is smaller than the first threshold, execute a second notification to notify an outside of the vehicle that the vehicle stops.