Cubic NMP Leak Monitoring Solution for Li-battery Industry Manufacturing Process

In lithium battery production, NMP (N-Methyl pyrrolidone), a critical solvent, is widely applied to dissolve binders including PVDF (Polyvinylidene Fluoride) for preparing cathode slurry. However, NMP features corrosive nature, posing risks to production equipment and battery performance, necessitating its removal through baking processes. Additionally, NMP’s flammability and explosivity at concentrations beyond the Lower Explosive Limit (LEL) demand rigorous safety controls. Accurate NMP detection will directly have impacts on battery performance, equipment integrity, and personnel safety. Therefore, it is vital to monitor NMP in manufacturing facilities.

Current NMP detection are mostly based on catalytic combustion sensors that detect gas via catalyst-induced flameless combustion, measuring resistance changes in heated wires. However, catalytic combustion sensors suffer from poor stability, frequent calibration needs, short lifespans (1–2 years), and susceptibility to interference. To solve the above problems, lithium battery companies need to calibrate or maintain catalytic combustion NMP sensors regularly. During calibration, the production line must be shut down, followed by trial production to ensure product quality and consistency, leading to higher maintenance costs and reduced production efficiency. Additionally, the short lifespan of catalytic combustion sensors requires frequent replacements, further increasing costs for battery manufacturers.

Understanding the current limitations of catalytic combustion technology, Cubic, a leading manufacturer of gas sensors and gas analyzers, has leveraged its mature NDIR technology to especially develop NMP leak detector, to improve the NMP detection during Li-battery manufacturing process.

Based on mature NDIR technology, Cubic NMP leak detector, Gasboard-2063 is designed with robust performance, as it offers a wide detection range of 0–100% LEL with a high resolution of 0.1% LEL, ensuring precise and reliable NMP monitoring in hazardous environments.

Gasboard-2063 ensures long-term stability by automatically calibrating within the cycle applying the lowest measured point as the baseline, eliminating temperature effects through software compensation, and optimizing filter parameters for narrow-band absorption. It features long-life infrared light sources and detectors, achieving a lifespan of over five years while using specific-wavelength infrared light to detect target gases without cross-interference.

Structurally, it meets the Ex dbIIC T3 Gb explosion-proof level and the integrated explosion-proof design for the sampling body and display ensures easy installation and disassembly, while the gas chamber maintains a constant temperature to eliminate temperature effects. Additionally, the aluminum head with an insulation block is pre-insulated to prevent component performance deterioration, and each joint is equipped with a waterproof sealing ring to meet the IP66 protection level. It is designed with industrial 4-20mA current output, RS485 external communication and concentration over-limit alarm output functions, suitable for complex and harsh high-temperature industrial environments.

Key features include:

• Non-dispersive infrared technology (NDIR), high accuracy.

• Self-calibration, maintenance-free.

• Strong anti-interference ability, long lifespan (≥5 years).

• Explosion-proof structure, Ex dbIIC T3 Gb explosion-proof grade.

• High temperature resistance, up to 160℃

Cubic Gasboard-2063 redefines NMP detection with calibration-free operation, extended lifespan, and unmatched reliability, which can be applied to improve worker safety and process control during lithium-ion battery manufacturing process.

For more details, please visit https://en.gassensor.com.cn/NMPGasLeakageDetector/info_itemid_2886.html  or contact us via sales@gassensor.com.cn