S-shaped compacting roller type oily PVDF coating machine

Abstract

The invention provides an S-shaped compacting roller type oily PVDF coating machine. The S-shaped compacting roller type oily PVDF coating machine comprises a machine case; an unwinding device, a gluetank, a drying box and a winding device are arranged in the machine case; an unwinding roller shaft is arranged in the unwinding device; a glue coating double-guide roller is arranged in the glue tank; an S-shaped compacting roller is also arranged above the glue tank; the S-shaped compacting roller is positioned above the glue coating double-guide roller; the drying box is positioned above the glue tank; a winding roller shaft is arranged in the winding device; and the drying box, the winding device and the winding roller shaft are arranged in a staggered manner. According to the oily PVDF coating machine provided by the invention, an S-shaped compacting roller shaft is additionally mounted; a base film enters the glue tank through the discharging roller shaft; excessive glue is filteredback into the glue tank through the S-shaped compacting roller after the base film is soaked through glue, so that an acetone raw material in liquid-containing base film which passes through the gluetank and is not dried is reduced by about 1 / 2; and therefore, a glued film can be dried by reducing the drying temperature from original 80 to 120 DEG C to 20 to 60 DEG C; raw materials and energy consumption are effectively reduced; and the product cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of oily PVDF coating, and in particular relates to an S-type compacting roller type oily PVDF coating machine. Background technique [0002] At this stage, China's battery industry is driven by the new energy vehicle market, and has been in a state of rapid development in recent years. The market production and sales scale and product performance have been greatly improved. With the advantages of high energy density, high safety, flexible design, and relatively small internal resistance, the application of pouch batteries has gradually increased in recent years. BYD, Beijing Guoneng, Funeng Technology, Jiewei Power, Wanxiang Yi Soft pack power battery enterprises represented by the second and third ranks have achieved rapid development. According to the statistics of GGII, the global soft pack battery shipments in 2018 increased by 73.8% year-on-year, reaching 23.1GWh, of which China’s soft pack battery shi...

AI Technical Summary

Problems solved by technology

The original oil-based PVDF coating machine consumes a lot of energy and raw materials when coating, so that the price of PVDF coating film remains high, which further leads to the high price of lithium batteries made of such separators. The pattern of price cuts has led to a disadvantageous position in the price of pouch batteries, which has a negative impact on the large number of applications of pouch batteries

[0004] When the existing oil-based PVDF coating machine is used for coating, the power system all uses electric energy, the machine temperature is set at 80-120°C, the blast frequency is 15-45 Hz, the exhaust frequency is 15-45 Hz, and the energy consumption is 0.18KW / h per square meter (including labor, electricity, and raw materials), the material loss is high, which directly leads to the high price of lithium batteries made of such diaphragms. Under the overall price reduction pattern of the lithium battery industry, the price of soft pack batteries is at a disadvantage. The large number of applications of batteries has caused adverse effects

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