Diaphragm winding buffering roll core

Abstract

The invention discloses a diaphragm winding buffering roll core. The diaphragm winding buffering roll core comprises a roll core body, a buffering supporting ring and buffering supporting strips, the buffering supporting ring is formed by splicing two half buffering supporting pieces, the buffering supporting ring sleeves the outer side wall of the roll core body, semi-fixing buckles are arranged on the outer side walls of the two ends of the half buffering supporting pieces, and a plurality of fixing buckles are distributed between the two semi-fixing buckles; and the buffering supporting strips are made of elastic materials and installed around the periphery of the outer side wall of the roll core body and the periphery of the outer side wall of the buffering supporting ring, and fixing buckle grooves matched with the fixing buckles are formed in the buffering supporting strips. The diaphragm winding buffering roll core has a buffering function and is convenient to replace, the product rolling rate is greatly increased, and the appearance reject ratio of semi-finished diaphragms is greatly reduced; and meanwhile, release of internal stress of the diaphragms is facilitated, and the number of defects can be greatly reduced when the radian or edge collapse of the diaphragms is detected.

Description

Technical field [0001] The present invention relates to a diaphragm winding buffer core, which belongs to the field of lithium battery diaphragm production. Background technique [0002] The diaphragm acts in a lithium ion battery charge and discharge process, and the electrolyte, which is sufficient to prevent the two poles, and absorb sufficient electrolyte, and provide sufficient electrolyte lithium ion channel, microporous self-correction protection. The lithium ion conductivity of the diaphragm directly is directly related to the overall performance of the lithium ion battery, and the performance of the diaphragm determines the interface structure of the battery, the retention of the electrolyte, and the internal resistance of the battery, etc., which in turn affects the capacity of the battery, cycle performance, charge and discharge current. Density and safety, etc. Important features. [0003] Existing wet diaphragm manufacturing methods generally include: ingredients → b...

AI Technical Summary

Problems solved by technology

However, none of these can meet the requirements of releasing the internal stress of the diaphragm itself and maintaining the appearance of the surface.

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