Vehicle External Power Control With Battery Reserve Threshold
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Solution Overview
Problem
Existing power supply control systems for vehicles struggle to appropriately set a lower limit value for external power supply from an on-vehicle battery, leading to potential depletion of the battery's remaining power, which can prevent the vehicle from traveling after external power supply.
Innovation Solution
A power supply control device that includes a detection part for external power supply initiation, a display control part for prompting the user to set a lower limit value, and a setting management part to manage and store the set value, ensuring the external power supply stops when the battery's remaining power falls below the set limit, with features like confirmation screens and notifications to prevent power depletion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If external power supply is performed from on-vehicle battery to outside of vehicle, then power can be supplied to external devices, but the battery remaining power may fall below the necessary power for vehicle traveling
Solution Approach 1:
The system performs preliminary action by displaying a lower limit value setting screen before external power supply begins, allowing the user to pre-set the minimum battery power threshold. This advance configuration ensures that the battery remaining power will not fall below the level needed for vehicle traveling, preventing the technical contradiction from occurring during actual power supply operation.
2Reliability
If lower limit value is set too high, then vehicle traveling power is ensured, but external power supply capability is reduced
Solution Approach 1:
The system applies dynamics by making the lower limit value adjustable rather than fixed. Users can dynamically set the lower limit value according to their specific needs, allowing optimization between vehicle traveling reliability and external power supply capability. The system also dynamically monitors battery power and compares it against the set threshold, enabling flexible adaptation to different operating conditions.
3Ease of operation
If confirmation screen is displayed at power supply start, then user awareness of power management is improved, but operation complexity increases
Solution Approach 1:
The confirmation screen is displayed as a preliminary action at the start of external power supply, before actual power transfer begins. This timing allows users to review and adjust the lower limit value setting while the vehicle is still stationary and safe, improving awareness without adding critical-path complexity to the power supply operation itself.
Data Source
AI summary
A power supply control device includes a power supply control part which controls, from an on-vehicle battery mounted in a vehicle, an external power supply that is a power supply to outside of the vehicle, and which stops the external power supply at a time when a power suppliable remaining amount of the on-vehicle battery becomes less than a predetermined lower limit value during external power supply, a display control part for displaying, on an on-vehicle display device mounted in the vehicle, a lower limit value setting screen that is a screen setting the lower limit value, and a detection part for detecting a start of the external power supply, when a start of the external power supply is detected, wherein the display control part displays, on the on-vehicle display device, a confirmation screen inquiring whether to display the lower limit value setting screen.