Method for preparing dry-method pole piece based on foaming fibrosis

Through the combination of foaming fibrosis technology and laser heating device, the problems of high equipment strength, high production cost and material structure damage in the existing dry-form electrode sheet preparation process are solved, and a dry-form electrode sheet with high energy density and efficient production is achieved.

CN119724947APending Publication Date: 2025-03-28FUJIAN TORCH ELECTRON TECH CO LTD
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Patent Information

Application Number
CN202411920080.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing dry-form electrode sheet preparation process has problems such as high equipment strength, high production cost and material structure damage, making it difficult to effectively improve the energy density and production efficiency of the electrode.

Method used

The dry electrode sheet is prepared by foaming fibrosis process. By adding foaming agent multiple times and foaming during heating and stirring, a fibrotic binder is formed. After vacuum defoaming and rolling treatment, a laser heating device is used to improve the ductility and fitability of the dry electrode sheet film.

Benefits of technology

The uniform fibrosis of the binder is achieved, the energy density and production efficiency of the dry electrode sheet are improved, the production difficulty and energy consumption are reduced, and the fit and ductility of the electrode sheet are improved.

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Abstract

The invention relates to a method for preparing a dry-method pole piece based on foaming fibrosis, which comprises the following steps of: 1, adding a required amount of binder into a stirrer for multiple times, heating, stirring and foaming to obtain a foaming fibrosis binder; step 2, adding an active substance and a conductive agent into the foamed fibrosis binder obtained in the step 1, and uniformly mixing and stirring to obtain a mixture; step 3, performing vacuum defoaming on the mixture obtained in the step 2, and removing residual gas to obtain a defoaming mixture; 4, adding the defoamed mixture obtained in the step 3 into a roller press for heating and rolling treatment to prepare a dry-method pole piece membrane; step 5, preheating the current collector and the dry-method pole piece film by using a laser heating device, and then compounding the dry-method pole piece film on the current collector to obtain a dry-method pole piece; in the preparation process, complicated processes and equipment are not needed, and the production difficulty of the dry-method pole piece is greatly reduced.
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