HANGZHOU NUZHUO TECHNOLOGY GROUP CO.,LTD.

Recently, the high-purity cryogenic nitrogen production device designed and manufactured by NUZHUO was successfully debugged and put into operation at the lithium battery industry customer site. The device performed exceptionally well in the acceptance test: the three core indicators – nitrogen production volume, purity, and pressure – all significantly exceeded the contractual values. Among them, the measured purity reached 0.09 ppm, far exceeding the 3 ppm requirement stipulated in the contract, providing a reliable nitrogen guarantee for the high-quality production of lithium battery customers.

During the manufacturing process of lithium batteries, nitrogen is widely used as a protective gas in key processes such as homogenization, coating, rolling, and filling. The purity and supply stability of nitrogen directly affect the consistency and safety of the batteries. Cryogenic nitrogen production is preferred due to its high purity and stable operation, and it holds an irreplaceable position in high-end lithium battery manufacturing. The device delivered by NUZHUO is specifically tailored to meet the strict requirements of the lithium battery industry for ultra-low oxygen content nitrogen.

According to the technical agreement signed by both parties and the on-site acceptance report, the nitrogen production capacity of this device is stipulated in the contract to be 1800 Nm³/h. The actual measurement reached 1947.3 Nm³/h, exceeding the contract value by 147.3 Nm³/h, which is approximately 8.2% higher. This means that the customer has gained additional production capacity with the same equipment investment, leaving room for subsequent production line expansion. In terms of nitrogen purity, the contract stipulates that the oxygen content should not exceed 3 ppm. The actual measurement was only 0.09 ppm, a purity increase of approximately 33 times, which is not only far superior to the contract standards but also significantly higher than the national standard “Pure Nitrogen, High-Purity Nitrogen and Ultra-Pure Nitrogen” with a high-purity nitrogen level of 99.999% (corresponding to an oxygen content of ≤ 10 ppm). In terms of nitrogen pressure, the contract requires 0.3 MPaG, and the actual measurement reached 0.42 MPaG, exceeding the contract value by 0.12 MPaG, a 40% increase, indicating that the device has stronger anti-interference ability when facing pressure fluctuations at the subsequent gas usage end.

NUZHUO has extensive experience in the lithium battery industry. Previously, the company designed and constructed a 1600Nm³/h high-purity nitrogen deep cooling box project for the global lithium battery leader, Ningde Time ATL, and successfully connected it to the grid. Considering the fluctuation characteristics of gas load in lithium battery production lines, NUZHUO’s deep cooling device is equipped with a fully automatic load-variable intelligent control system, which can automatically adjust according to the end-use gas consumption within the range of 50% to 105% of the load, maintaining the stability of the distillation tower operation and ensuring that the nitrogen purity and pressure do not fluctuate with the production volume. This feature has also been verified in this project: during the commissioning period, there were multiple adjustments of gas load, and the outlet nitrogen purity remained stable below 0.1ppm throughout.

The successful commissioning of this project once again demonstrates NUZHUO’s design and delivery capabilities in the field of small-scale high-purity cryogenic nitrogen production. For lithium battery customers, the delivery of equipment with indicators exceeding expectations not only ensures contract fulfillment but also brings lower tonnage of battery gas costs and less quality risks in actual production. NUZHUO stated that they will continue to provide full life cycle operation support for this device to ensure the long-term stable and reliable supply of nitrogen to the customer’s production line.

NUZHUO

NEW GAS-SMALL-SCALE CRYOGENIC ASU EXPERT

You can find us by follows:

Elena Liu 

Tel./Whatsapp/Wechat:+86-15531448603

Email :elena@hznuzhuo.com