Nitrogen For Lithium Battery Production

Shenger Gas specializes in providing nitrogen for lithium battery production. This system uses air as raw material and continuously and stably generates high-purity nitrogen through cryogenic air separation or pressure swing adsorption (PSA) processes, providing an oxygen-free and water-free protective atmosphere for lithium battery pole piece coating, positive and negative electrode sintering, electrolyte filling, packaging, storage and other links.

During the lithium battery manufacturing process, oxygen and moisture can cause oxidation, moisture absorption or decomposition reactions of active materials, while high-purity nitrogen ensures the stability and safety of the production environment. Shenger Gas' equipment covers PSA, VPSA and cryogenic nitrogen production series, and is suitable for multi-scenario applications from small and medium-sized battery cell factories to 10,000-ton lithium battery cathode material bases.

Our equipment has been widely used in lithium battery industry chain projects at home and abroad, and is an ideal choice for building efficient, energy-saving, and safe atmosphere control systems.

Working principle

Shenger Gas nitrogen generator can adopt two core technical routes according to different application scenarios:

1. PSA pressure swing adsorption nitrogen production

By utilizing the characteristics of carbon molecular sieve (CMS) to have different adsorption rates of oxygen and nitrogen under different pressures, high-purity nitrogen is separated from the air through the cycle process of "pressure adsorption-decompression desorption". This solution has compact structure, fast start-up and low energy consumption, and is suitable for lithium power plants with daily consumption of 100 to 2000 Nm³/h.

2. Nitrogen production by cryogenic air separation

The air is deeply cooled to below −180°C, and nitrogen, oxygen, argon and other gases are separated through a distillation tower to obtain ultra-high purity nitrogen (99.999%). This solution is particularly suitable for occasions with extremely high purity requirements, such as sintering of large-scale cathode materials and high-temperature protection of nickel-cobalt-manganese ternary systems.

System structure composition

A typical nitrogen for lithium battery production system includes the following main modules:

• Air compressor system: provides compressed air raw materials;
• Air purification system: dust removal, oil removal, water removal, and CO₂ removal to ensure that the air entering the host is clean;
• Adsorption tower/cold box system: core separation unit to achieve oxygen and nitrogen separation;
• Nitrogen buffer tank: balance pressure and stabilize flow;
• Control system (PLC + touch screen): automated operation, real-time display of purity, flow, pressure, energy consumption and other parameters;
• Optional drying device (SER/SRL series): achieves a dew point below −60°C to ensure ultra-low humidity requirements in the battery dry room and coating environment.

Product advantages

• Ultra-high purity nitrogen: the purity can reach up to 99.999%, meeting the requirements of the entire process of lithium battery positive electrode, negative electrode, separator drying and electrolyte packaging.
• Low dew point guarantee: dew point ≤-60℃, effectively preventing hygroscopic reaction of battery materials.
• Energy-saving operation: The system energy consumption is only 0.25~0.45 kWh/Nm³. With frequency conversion control and optimized air flow path, it can save more than 30% of electricity in long-term operation.
• Modular design: The equipment can be integrated in a container, with a short installation cycle and easy maintenance.
• Intelligent control system: can realize unattended operation, remote monitoring and energy consumption statistics.
• Full-process EPC service: Shenger Gas provides integrated turnkey engineering services from design, installation to maintenance.

Technical Parameters

Note: Parameters can be customized according to customer site conditions, gas consumption requirements, and installation environment.

Temperature and energy consumption indicators

• Ambient temperature range: −10°C～+45°C
• Gas outlet temperature: 15°C～30°C
• Energy consumption level: 0.25～0.45 kWh/Nm³ (depending on purity and pressure)
• Operation mode: fully automatic PLC control, can be connected to DCS system for remote monitoring

Industrial applications

Nitrogen for lithium battery productio system is widely used in:

• High temperature sintering atmosphere protection for positive and negative electrode materials (NCM, LFP, NCA)
• Electrode coating and drying line inert protection
• Electrolyte filling, packaging and drying rooms are maintained in an oxygen-free state
• Anti-oxidation and explosion-proof atmosphere during cell formation, formation and aging stages
• Lithium battery storage and transportation, filling line and vacuum drying system supporting

Through a stable and clean supply of high-purity nitrogen, it can effectively prevent oxidation, hydrolysis and thermal runaway reactions of active metals, and improve product consistency and safety.

Certification standards

Shenger Gas products strictly follow the international standard system:

• ISO 9001:2015 Quality Management System Certification
• ASME Standard for Pressure Vessel Design and Construction
• CE, COC export compliance certification
• Electrical safety standards: IEC/GB/EN series
• Design standards: GB/T 3864, ISO 8573, EN 60204

Ensure long-term, safe and reliable operation of equipment worldwide.

As the world's leading gas system EPC manufacturer, Shenger Gas has been deeply involved in gas separation technology for more than ten years and has independent intellectual property rights, ASME certification and export experience.

We are committed to providing customers with high-purity, energy-saving, and intelligent gas solutions to make nitrogen for lithium battery production more efficient and controllable.

Shenger Gas - Make every cubic meter of gas purer and more efficient!

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