Comprehensive Gas Safety Monitoring Solution for the New Energy Industry

## Key Monitoring Nodes (by Sub-Industry)

### Lithium battery factory
– **Electrode coating**: NMP (N-methylpyrrolidone) VOC PID + LEL
– **Electrode Baking**: Toluene + Xylene + LEL × 25% Interlock
– **Formation + Injection**: Decomposition products of electrolyte, including HF, CO, H2, and smoke, trigger emergency ventilation
– **Diaphragm Workshop**: VOC + Electrostatic Monitoring
– **Recycling / Disassembly**: Battery shredding process involving H2 + CO + HF (wet / dry process)

### Energy Storage Power Station (Core + Rapid Growth)
– **Within each battery cluster / cabin**:
– **H2 ppm-level sensitivity** (early detection of H2 release during thermal runaway, 30-60 minutes ahead of smoke alarm activation)
– **CO** + **CO2** (by-products of combustion)
– **Smoke** (multi-wavelength smoke detection, distinguishing between vapor and smoke)
– **Infrared thermal imaging** (battery temperature field inversion, immediate alarm for hot spots > 50℃)
– **VOC PID** (electrolyte vaporization)
– **Emergency linkage**: H2 > 0.4% LEL OR temperature > 60℃ → cut off the DC contactor of the cluster + activate heptafluoropropane/perfluorohexanone + isolate + notify operations
– **Reignition Prevention and Control**: Continuous monitoring of H2, CO, and temperature for 24 hours after the fire is extinguished → Prevents reignition (the reignition rate of lithium battery fires is 30%)

### Hydrogen Energy Industry Chain
– **Electrolyzed Water Hydrogen Production Station**: Alkaline Electrolyzer / PEM Electrolyzer → H2 + O2 Concentration + Diaphragm Leakage (H2 Leaking into O2 Side or Vice versa = Explosion Risk)
– **Hydrogen Storage Cylinder Bundle (35 / 70 MPa)**: High-pressure hydrogen leak jet monitoring (H2 0.01% LEL sensitivity) + pressure + temperature
– **Hydrogen refueling station**: Leakage at the filling nozzle + Gas unloading column (truck → station storage tank) + Compressor room (liquefied hydrogen vaporization)
– **Fuel cell stack**: H2 inlet of the stack / residual H2 in exhaust gas (< 4% safe release)

### Photovoltaic Manufacturing
– Single crystal furnace / Polycrystalline furnace: SiH4 + Ar + Vacuum line
– Slicing: cutting fluid VOC + particles
– Battery cell: HF / HCl / NH3 (similar to semiconductors)

### Wind Power (Special)
– Inside the gearbox: H2 (insulating oil + aging products of vaseline) + oil mist + temperature
– Battery cabinet (backup power supply): H2 + CO
– Offshore wind power: Salt spray / damp heat and explosion-proof probe

## Key Technical Specifications

– Explosion-proof: Ex d IIC T1 (the strictest level for H2) / Ex d IIB T4 (general)
– Protection: IP66 – IP68 (outdoor energy storage + offshore wind salt spray)
– Range: H2 0.01-100% LEL (ppm-level sensitivity, early stages of thermal runaway)
– Response time: T90 < 5 seconds (H2 + lithium battery thermal runaway critical time window)
– Operating temperature: -40°C to +75°C (energy storage station in northern winter and southern summer)
– Vibration resistance: Offshore wind power + wind turbine tower vibration resistance ≥ 5g
– Communication: CAN + Modbus + IEC 61850 (substation standard), interfacing with BMS / EMS / FMS

## Implementation Key

1. **Early Warning for H2 in Energy Storage Power Stations**: H2 provides an early warning 30-60 minutes before smoke alarms, serving as the gold standard for thermal runaway detection
2. **Triple confirmation mechanism**: Triple confirmation of H2 + temperature + BMS voltage drop to avoid unnecessary fire suppression triggered by false alarms from single parameters
3. **Hydrogen Station Compliance**: Hydrogen refueling stations must undergo dual design reviews based on GB 50516 and GB 50177, as well as fire protection and acceptance inspections by the emergency management authority
4. **Wind turbine gearbox**: The upward trend of H2 is more important than its absolute value. If H2 growth exceeds 10% for three consecutive months, arrange for a major gearbox overhaul
5. **Offshore Wind Power Salt Spray**: All probes must pass the GB/T 2423.17 salt spray test for ≥ 720 hours

## Regulatory Basis

– GB 51048-2014 "Design Code for Electrochemical Energy Storage Power Station"
– NB/T 42090-2016 "Technical Specification for Monitoring System of Electrochemical Energy Storage Power Station"
– GB 50516-2010 "Technical Code for Hydrogen Refueling Station" (under revision)
– GB 50177-2005 "Design Code for Hydrogen Fueling Station"
– GB/T 26939-2011 Hydrogen Metering System for Hydrogen Refueling Stations
– GB 50493 Detection and Alarm Design
– IEC 61850 substation communication standard (power side docking of battery energy storage station)
– GBZ 2.1 Limit Values (HF 1.7 mg/m³ / NMP 80 mg/m³)

## Applicable Customers

Power batteries (CATL / BYD / Guoxuan Gaoke / Zhongchuang Xinhang / Honeycomb / EVE Energy / Xinwangda); energy storage integration (Sungrow / BYD / Haibosichuang / Zhongtian Technology / Pinggao Electric / Envision Energy); hydrogen energy (Guojia Dian Tou Hydrogen Energy / Sinopec Hydrogen Energy / Guohydrogen Technology / Houpu Shares / Meijin Energy); hydrogen refueling station operation (Sinopec / PetroChina / Linde / Air Liquide / National Energy); photovoltaic manufacturing (Longi / Tongwei / JA Solar / Trina Solar / Canadian Solar / TCL Zhonghuan); wind power (Goldwind / Envision / Mingyang / Windey / China Offshore Wind Turbine); new energy vehicles (NIO / Li Auto / XPeng / BYD / Changan / Geely / GAC Aion / ZE / Qianwang / AITO).