Grafting treatment apparatus and grafting treatment method for battery diaphragm material

Abstract

The invention relates to a grafting treatment apparatus and a grafting treatment method for a battery diaphragm material. The grafting treatment apparatus for the battery diaphragm material comprises a battery diaphragm material unreeling device, a corona processor or normal temperature plasma processor, a photoinitiator dipping device, a photoinitiator drying device, an ultraviolet irradiation device, a grafting reaction device including an allyl monomer solution dipping and coating unit, an ultraviolet irradiation grafting device, a washing device, a drying device, a battery diaphragm material rolling device and a guiding device. The grafting treatment method for the battery diaphragm material using the grafting treatment apparatus comprises the following steps: allowing a reeled battery diaphragm material to pass through the corona processor or normal temperature plasma processor in an unfolding state for pretreatment; allowing the battery diaphragm material to pass through a photoinitiator solution and successively carrying out drying and ultraviolet irradiation; dipping and coating the battery diaphragm material with an oxygen-free allyl monomer solution for grafting treatment; subjecting the battery diaphragm material containing allyl monomers to ultraviolet radiation grafting in an oxygen-free state; and finally carrying out washing and drying.

Description

technical field [0001] The invention belongs to the technical field of battery separator preparation, and in particular relates to a battery separator material graft treatment equipment and a graft treatment method. Background technique [0002] The battery separator is one of the key materials of the secondary battery, and its performance directly affects the overall performance of the secondary battery. Secondary batteries include nickel-metal hydride batteries, nickel-zinc batteries, zinc-silver batteries, zinc-air batteries, and lithium-ion batteries. These batteries have similar performance requirements for battery separators, such as good chemical stability, wettability, and mechanical strength. The structural characteristics of air permeability, small pore size and high porosity are not completely consistent in the required degree. Based on the above requirements, people usually use vinylon, nylon, polyolefin ultrafine short fibers, and polyolefin microporous membran...

AI Technical Summary

Problems solved by technology

Carrying out the grafting treatment of vinyl monomers of battery diaphragm materials through the above grafting treatment method, although the expected effect and purpose can be achieved in terms of performance, but there are expensive equipment, difficult continuous production control, serious waste of grafted monomer solution, Problems such as high production comprehensive cost

For example, radiation grafting: radiation equipment is expensive and continuous production is difficult to achieve; light-induced grafting: although the equipment cost is relatively low, the process control conditions are demanding, and there are consistency problems that are difficult to overcome such as light intensity changes and wavelength control. Grafting by copolymerization method: this method is mainly used in the plastic synthesis process, and cannot be applied to the grafting treatment of battery diaphragm materials; chemical grafting: it is a commonly used grafting method, but the grafting reaction time is long, and continuous consistency cannot be achieved Stable production, and low utilization rate of vinyl monomers (easy homopolymerization), easy to cause pollution to the environment

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