Vehicle Start Control via High Voltage Battery Submersion Detection
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Solution Overview
Problem
Hybrid and electric vehicles face safety risks due to potential submersion of high voltage batteries, which can lead to leakage currents and electrocution hazards, as existing solutions require separate devices to protect the battery.
Innovation Solution
A method and apparatus that sense submersion of the high voltage battery, output a warning signal, and cut off the ignition or start of the vehicle, using a sensing system, controller, and high voltage relay to disconnect the battery from the high voltage device, thereby preventing dangerous situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate devices are installed to protect the battery from submersion, then battery safety is improved, but device complexity increases
Solution Approach 1:
The patent combines the submersion detection function and battery protection function into a single integrated system. The controller monitors battery submersion status and automatically controls the relay to disconnect high voltage when submersion is detected, eliminating the need for separate protection devices while maintaining battery safety
Solution Approach 2:
The controller performs multiple functions: it manages normal vehicle operation, monitors battery submersion status, and controls the high voltage relay for protection. This multi-functional approach reduces the need for dedicated separate devices while improving overall system efficiency
2Reliability
If the vehicle start is cut off when battery submersion is detected, then passenger safety is improved, but vehicle availability decreases
Solution Approach 1:
The system performs preliminary detection of battery submersion status before allowing vehicle start. When submersion is detected, the controller prevents start-up by controlling the relay to disconnect high voltage, thereby proactively preventing electrocution hazards before they can occur
Solution Approach 2:
The controller continuously monitors battery submersion status and prepares the protection mechanism in advance. When submersion is detected during driving, the system gradually reduces power output before complete cutoff, allowing for a controlled transition that maintains safety while minimizing disruption
Data Source
AI summary
A method and system for controlling the start of a vehicle are provided. The method includes determining whether a high voltage battery of a vehicle is submerged and outputting a warning regarding the submersion when the high voltage battery is submerged. In addition, power is cut off and the vehicle ignition or the start of the vehicle is turned off after the warning signal is output.