Powder transfer roller apparatus and powder transfer method

The powder transfer roller apparatus efficiently shapes electrode materials into desired forms without transitioning to a slurry, reducing electricity consumption in lithium-ion battery manufacturing.

JP7893031B2Active Publication Date: 2026-07-22SINTOKOGIO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
SINTOKOGIO LTD
Filing Date
2022-05-23
Publication Date
2026-07-22

AI Technical Summary

Technical Problem

Conventional electrode manufacturing methods for lithium-ion batteries require electrical drying, which consumes a significant amount of electricity, necessitating a process that maintains the electrode material in powder form without transitioning it into a slurry.

Method used

A powder transfer roller apparatus comprising a first roller with a recess and a second roller with a flat surface, where the first roller's circumferential speed exceeds the second roller's, and a sheet member moves faster than the first roller, allowing powder to be molded into a desired shape while remaining in powder form.

Benefits of technology

This method reduces electricity consumption by eliminating the need for electrical drying, enabling efficient shaping of electrode materials into electrode plates directly from powder form.

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Patent Text Reader

Abstract

To provide a technique for molding powder materials into desired shapes while keeping them in the powdered form.SOLUTION: A powder transfer roller device (100) includes a first roller (31) having a recessed portion (32) provided in a part of the circumferential surface; a second roller (41) with a completely flat circumferential surface which is opposed to the first roller (31) and which compacts, between the second roller (41) and the recessed portion (32) of the first roller (31), powder (25) supplied between the first roller (31) and the second roller (41); and a powder supplying device (21) configured to supply powder (25) between the first roller (31) and the second roller (41).SELECTED DRAWING: Figure 2
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