Dry film manufacturing method, rolling device, dry film, and substrate coated with dry film

The method employs a rolling device with differentially rotating rolls to process dry powder mixtures into mechanically stable dry films directly on the first roll, addressing inefficiencies in existing methods by eliminating the need for freestanding films and additional stabilization steps.

JP2025038179AActive Publication Date: 2025-03-18FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG EV +1
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Patent Information

Application Number
JP2024224200
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2017-05-16
Filing Date
2024-12-19
Publication Date
2025-03-18
Estimated Expiration
2038-05-14

AI Technical Summary

Technical Problem

Existing methods for applying dry films to substrates in battery electrode manufacturing are inefficient and require multiple stages, including the formation of cumbersome freestanding films or additional process steps for mechanical stabilization.

Method used

A method using a rolling device with two rolls, where the first roll rotates at a higher speed than the second roll, to process a dry powder mixture into a dry film, achieving mechanical stabilization and film formation directly on the first roll, thereby avoiding the need for freestanding films and additional stabilization steps.

Benefits of technology

This method allows for efficient and mechanically stable application of dry films to substrates, reducing process complexity and energy input, while enabling the production of thin, stable dry films suitable for battery electrodes.

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Abstract

To provide a method that allows a dry film to be applied to a substrate in an efficient and mechanically stable manner, a rolling device, and a manufactured dry film.SOLUTION: The present invention relates to a method for manufacturing a dry film (3), in which a dry powder mixture is processed into the dry film (3) by a rolling device including a first roll (2a) and a second roll (2b). The first roll (2a) has a higher circumferential rotation speed than the second roll (2b). The second roll (2b) and the dry film (3) are placed on the first roll (2a).SELECTED DRAWING: Figure 1
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