Vehicle Power Supply Control for User-Timed Auxiliary Load Interruption
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Solution Overview
Problem
Existing vehicle control devices cannot interrupt power supply from a high-voltage battery to a low-voltage system at a timing desired by the user, leading to inconvenient power transitions during vehicle inspection or other operations.
Innovation Solution
A vehicle control device with an operation detection unit, power supply control unit, and prohibition control unit that detects user operations and controls power supply from a high-voltage battery to auxiliary loads in the low-voltage system, allowing users to interrupt and resume power supply as needed with the vehicle start switch off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power supply from high-voltage battery to low-voltage system is automatically controlled to prevent battery exhaustion, then reliability of power supply is improved, but user control flexibility deteriorates
Solution Approach 1:
The system dynamically switches between automatic control mode (when start switch is off) and manual control mode (when start switch is on), allowing the control strategy to adapt based on user intent and vehicle state
Solution Approach 2:
The control device monitors the state of the start switch to detect user intent, using this feedback to determine whether to enable automatic power supply control or manual interruption, thereby balancing reliability and user control
Data Source
AI summary
A vehicle control device mounted on a vehicle includes: an operation detection unit that detects an operation performed on the vehicle by a user; a power supply control unit that controls execution of power supply from a first battery involved in vehicle traveling to an auxiliary load powered by a second battery that is different from the first battery, with a start switch of the vehicle being off; and a prohibition control unit that prohibits the power supply to the auxiliary load by the power supply control unit, in response to the operation of the user detected by the operation detection unit.