HV Junction Box Temperature Sensing for Early Vehicle Fire Warning
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Solution Overview
Problem
Commercial eco-friendly vehicles face increased fire risks due to complex power topologies and harsh driving conditions, making it difficult to detect and warn of potential fires in a timely and effective manner.
Innovation Solution
A fire alerting apparatus is implemented in a commercial eco-friendly vehicle, featuring a temperature sensor in the high-voltage junction box connected to the high-voltage battery, which detects temperature anomalies and triggers warnings through an interface device, including notifications for overtemperature and fire risks, and communicates with external service centers to initiate emergency responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a temperature sensor is installed in the high-voltage junction box to detect fire risks, then fire detection capability is improved, but device complexity increases
Solution Approach 1:
The temperature sensing device is integrated into the existing high-voltage junction box structure, merging the fire detection function with the power distribution component. This combination allows fire risk monitoring without adding separate standalone detection systems, thereby improving reliability while minimizing the increase in device complexity.
Solution Approach 2:
The high-voltage junction box serves multiple functions: power distribution to electronic components and fire risk detection through the integrated temperature sensor. This multi-functionality approach allows the same component structure to fulfill both electrical and safety monitoring roles, resolving the contradiction between enhanced detection capability and system complexity.
2Measurement precision
If multiple temperature thresholds and warning levels are implemented, then fire warning accuracy is improved, but control system complexity increases
Solution Approach 1:
The temperature monitoring range is segmented into multiple threshold levels (first threshold value and second threshold value), with each level triggering different warning responses. This segmentation enables precise fire risk assessment by dividing the continuous temperature spectrum into discrete risk zones, improving warning accuracy while maintaining manageable control logic through clear threshold-based decision rules.
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
The system effectively detects fire situations in advance, reducing damage and costs by providing step-by-step warnings and enabling immediate action to prevent vehicle fires, ensuring safety and minimizing quality-related issues.
Implementation Method 1
a temperature sensing device configured to sense a temperature of a bus bar of a high-voltage junction box
Data Source
AI summary
A fire alerting apparatus for a vehicle, includes: a temperature sensing device configured to detect a temperature of a bus bar of a high-voltage junction box; and performing a warning by determining at least one of a fire warning state, an overtemperature state, or a vehicle inspection state in accordance with a temperature detection result of the temperature sensing device.