Device and method for preparing lithium ion electrode diaphragm and modified separator

Abstract

The invention discloses a device and a method for preparing a lithium ion electrode membrane and a modified isolation membrane, which belong to the technical field of vacuum coating. The improved device at least comprises a vacuum casing, a coating machine and a vacuum drying tunnel; the vacuum drying tunnel is connected with a vacuum casing or two vacuum casings; the coating machine is installed on the vacuum drying tunnel and the vacuum drying tunnel respectively. Inside the casing, the unwinder and coating head of the coating machine are installed in the left inlet and outlet door of the vacuum casing, and the rewinding machine of the coating machine is installed in the right inlet and outlet door of the vacuum casing. The method is to change the normal temperature and pressure environment coating process into a vacuum environment coating process; ensure that the vacuum drying tunnel and the vacuum casing are in a vacuum heat preservation state during the working period of the coating machine; the invention has a reasonable structure design and can realize coating materials Low-temperature drying, uniform heating, energy saving, high efficiency, high purity and high recovery rate of medium solvent recovery, mass production and coating can be performed in a vacuum state; improve material coating quality, increase production efficiency, and reduce production costs.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrode preparation, and in particular relates to a device and a method for preparing a lithium-ion electrode membrane and a modified isolation membrane. Background technique [0002] Lithium-ion batteries have become the main energy storage and energy supply methods for modern electronic equipment, especially with the technological development and application of electric vehicles, the requirements for key technology power batteries are getting higher and higher. At present, the automotive power battery and high-efficiency energy storage battery that are most likely to be industrialized and applied are lithium-ion batteries. In the manufacturing process of lithium-ion batteries, the coating of the pole piece and the treatment of the modified separator are very important and indispensable manufacturing processes. At present, the coating treatment in the normal temperature and pressure...

AI Technical Summary

Problems solved by technology

In the manufacturing process of lithium-ion batteries, the coating of the pole piece and the treatment of the modified separator are very important and indispensable manufacturing processes. At present, the coating treatment in the normal temperature and pressure environment is slow in heating rate, long in heating time, and the material is not heated. Uniformity, poor heat preservation effect, waste of energy, low medium solvent recovery rate and recovery purity, material pollution, environmental pollution problems are common, and have plagued battery manufacturers for a long time, resulting in high product costs and poor safety.

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