Lithium battery pole piece coating production processing system

Abstract

The invention relates to a lithium battery pole piece coating production processing system. The lithium battery pole piece coating production processing system comprises a mounting table, winding mechanisms, a smoothing roller, tensioning mechanisms, a slurry coating mechanism and a drying mechanism, the winding mechanisms are mounted at the left end and the right end of the mounting table, the tensioning mechanisms are symmetrically mounted on the mounting table on the opposite inner sides of the winding mechanisms, the smoothing roller is arranged between the winding mechanism on the left side of the mounting table and the tensioning mechanisms through a roller frame, and the slurry coating mechanism and the drying mechanism are sequentially mounted on the mounting table between the twotensioning mechanisms from left to right. According to the lithium battery pole piece coating production processing system, gas with a certain pressure is introduced into a slurry box through a gas inlet pipe, and a certain pressure is generated in the slurry box to push slurry in the slurry box to flow, so that the flow of the slurry extruded from a slurry extrusion port is fixed, and the coatingthickness of the lithium battery pole piece is controlled.

Description

technical field [0001] The invention relates to the technical field of lithium battery production, in particular to a lithium battery pole piece coating production and processing system. Background technique [0002] The coating process is a process based on the study of the physical properties of the fluid, coating one or more layers of liquid on a current collector, which is usually a flexible film or backing paper, and then the coated liquid is coated The layer is dried or cured in an oven to form a film layer with special functions. Lithium battery pole piece coating is the next process after the preparation of the slurry. The main purpose of this process is to evenly coat the slurry with good stability, good viscosity and good fluidity on the positive and negative electrode current collectors. Electrode coating is of great significance to the capacity, consistency, and safety of lithium batteries. According to incomplete statistics: the battery failure caused by the p...

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Problems solved by technology

[0003] The following problems exist in the existing lithium battery pole piece coating production: 1. It is difficult to grasp the thickness of the coating during the existing lithium battery pole piece coating production. If the thickness of the coated surface is too small, the battery capacity may not reach Nominal capacity, if the thickness of the coating surface is too large, it is easy to cause waste of ingredients. In severe cases, if the positive electrode capacity is excessive, the lithium dendrites formed due to the precipitation of lithium will pierce the battery separator and cause a short circuit, causing safety hazards; 2. Existing In the coating production of lithium battery pole pieces, before coating on the current collector, there are wrinkles on the current collector that are prone to folding, which affects production efficiency and quality

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