Lithium-ion battery separator production: how to control the energy consumption of the wet diaphragm production line?

Lithium-ion batteries have become hot with the popularity of the 3C consumer electronics market in recent years and the continued rising in new energy vehicles. Lithium-ion battery separators, which are one of the important components inside lithium-ion batteries, have also attracted much attention, and a large number of related companies and investors have expanded or entered the industry.

At present, the main production processes of lithium ion battery separators are dry and wet. The wet diaphragm has become a new development direction of the diaphragm industry because of its advantages in heat shrinkage. In 2012, new projects and expansion projects began. The wet diaphragm line has been targeted.

At present, only the Zhongke Hualian family and the three or four companies in Japan and South Korea can master the production capacity of the whole production line of wet diaphragm. Measuring the success of a wet diaphragm production line, in addition to production speed and product stability, energy consumption is also a crucial point!

The impact on the energy consumption of the wet diaphragm production line is mainly due to the control of the amount of liquid in the extraction tank. Under the premise of ensuring the completion of the extraction effect, the smaller the amount of liquid input means that the smaller the amount of the mixed liquid to be treated in the later liquid separation and other processes, the less the electric water vapor and the like required to be used.

At present, the extraction tank of the wet membrane production line of Japan and other enterprises is to ensure the extraction effect, and the liquid intake is about 6m3/h. The ultrasonic recovery of Qingdao Zhongke Hualian extraction tank and the internal self-circulation of the extraction tank are 3m3/h. about. The cost of processing 1 m3 of mixture per hour is 150 yuan. The cost difference caused by the difference in the amount of liquid in the extraction tank is more than three million yuan a year.

It can be seen that for the wet diaphragm production line, the amount of liquid in the extraction tank is directly related to the energy consumption of the entire line, which also has an important impact on the profitability of the enterprise and the maximization of benefits.

In the context of the further decline in the price of the entire power battery industry chain in 2017, lower production costs will greatly help to improve market competitiveness.

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