A rolling type battery pole piece rolling machine

Abstract

The invention discloses a rolling type battery pole piece roller press. The rolling type battery pole piece roller press comprises an unwinding mechanism, a winding mechanism and a rolling mechanism, wherein the rolling mechanism comprises an upper roller system and a lower roller system mutually fitting to roll a battery pole piece, and further comprises a plate strip auxiliary device; the plate strip auxiliary device comprises support rollers and plate strips parallel to the upper roller system and the lower roller system; at least three support rollers are provided, and are polygonally fixed at the two sides of the upper roller system and the lower roller system; the plate strips encircle the peripheries of the support rollers, and form a polygonal closed ring under the support through the support rollers; the top surface of the closed ring is higher than the top end of the upper roller system; and the bottom surface of the closed ring is arranged in a gap between the upper roller system and the lower roller system, and is lower than the top end of the lower roller system. The rolling type battery pole piece roller press is applied to the rolling of the battery pole piece, reduces the elongation of the battery pole piece, and improves the rolling quality and the compaction density of the battery pole piece.

Description

technical field [0001] The invention relates to a rolling machine, in particular to a rolling machine used for rolling battery pole pieces. Background technique [0002] The rolling of the battery pole piece refers to the process in which the battery pole piece is compressed and deformed by the friction force generated between the roller and the battery pole piece in the roller press, which is pulled between the rotating upper and lower roll systems. The rolling of the battery pole piece is a process of combining and compacting the battery material and the substrate on the positive and negative plates. The purpose is to increase the compaction density of the positive or negative electrode material. The bonding strength of the battery material and the substrate directly determines the battery cycle Life, and because the battery material and the base material are not the same material, it is easy to separate, and it is not easy to ensure the compaction density. [0003] Durin...

AI Technical Summary

Problems solved by technology

Although this method can control the gap and pressure between the upper roller system and the lower roller system to a certain extent, the force distance and time of the battery pole piece between the upper roller system and the lower roller system are relatively short. Due to the pressure of the pressing roller on the battery pole piece, the battery pole piece is subjected to a large extension tension, causing deformation of the battery material, affecting the compaction density and uniformity

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