📋 Case Study
Battery Module Assembly Line Thermal Runaway Prevention
Thermal runaway propagation risk during cell handling; existing fire suppression lacked scenario-specific activation logic
🏗️ Project Overview
High-voltage lithium-ion battery pack assembly with ultrasonic welding and electrolyte filling
🎯 Challenge
Thermal runaway propagation risk during cell handling; existing fire suppression lacked scenario-specific activation logic
🔧 Design Approach
LOPA-defined IPL stack: IR camera hotspot detection (auto-stop), localized CO₂ nozzle with <2s discharge latency, explosion venting panel, and automated cell quarantine protocol
📐 Design Diagram
AI-generated project design illustration
📐 Key Calculations
Hotspot Detection PFD
False negative rate from validation dataset
Result: 0.03
Primary IPL with RRF = 33
CO₂ Discharge Latency RRF
1 / (probability of delay > 2s)
Result: 95
Time-critical IPL requiring hardware-software co-validation
Vent Panel Burst Pressure Margin
MAOP × 1.25 − design burst pressure
Result: +18%
Confirms reliable venting before containment failure
📊 Results
Runaway propagation probability reduced by 99.2%; UL 9540A validation passed; enabled Class 10k cleanroom certification💡 Lessons Learned
- •Time-dependent IPLs (e.g., suppression latency) require empirical validation under worst-case thermal profiles
- •Explosion venting must be modeled with dynamic pressure curves—not static burst ratings—to qualify as IPL
✅ Key Takeaways
- 1Time-dependent IPLs (e.g., suppression latency) require empirical validation under worst-case thermal profiles
- 2Explosion venting must be modeled with dynamic pressure curves—not static burst ratings—to qualify as IPL
📐 Prerequisites
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🔗 Engineering Applications
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