Dry method electrode film preparation device and its battery production line

Abstract

The invention provides a dry electrode film preparation device and its battery production line, including a preforming mechanism for preforming the mixed raw materials into a self-supporting semi-finished dry electrode film and a preforming mechanism for rolling the semi-finished dry electrode film It is the rolling mechanism of the finished dry electrode film. The preforming mechanism includes a conveying workbench, a material distributing mechanism and a compacting mechanism arranged above the conveying workbench. The rolling mechanism corresponds to the discharge end of the conveying workbench, and the material distributing mechanism is close to the The feeding end of the conveying table is used to flatten the raw material into a raw material layer; the compacting mechanism is provided with a compacting surface corresponding to the table surface of the conveying table, used for compacting the raw material layer. The raw material is preformed into a self-supporting semi-finished dry electrode film by the preforming mechanism, and then rolled by the calendering mechanism, so that the electrode film is not easy to be broken during production, and the required dry product can be achieved without multiple rolls. The thickness of the electrode film.

Description

technical field [0001] The invention relates to the technical field of battery electrode preparation, in particular to a dry method electrode film preparation device and a battery production line thereof. Background technique [0002] The electrode is the key to determine the energy density and cycle performance of the battery. The traditional electrode manufacturing process is a wet coating process. The general process is: stirring and homogenizing + coating and drying + roll forming + slitting process . Among them, the stirring and homogenizing and coating and drying processes are lengthy, and the equipment requirements and the workshop area are large, resulting in a lot of waste, and the stirring and homogenizing process requires the use of a specific solvent (NMP), which is toxic and needs to be recycled. , Purified and reused requires huge, expensive and complicated recycling equipment. Therefore, dry electrode technology has been gradually adopted in the prior art. ...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a dry-process electrode film preparation device and its battery production line, which are used to solve the problem that in the prior art, when the electrode powder is directly extruded into a finished electrode, the belt is easily broken and affects the subsequent process or the finished dry electrode film produced. Excessive thickness affects the power performance of the battery and other defects. The raw material is preformed into a semi-finished dry electrode film with certain specifications and self-supporting properties through the preforming mechanism, and then the semi-finished dry electrode film is rolled by the rolling mechanism. The electrode film is not easy to be broken during the production process, and the required thickness of the finished dry electrode film can be achieved without multiple rolls

Images