Manufacturing method for wet granular body of electrode active material mixture, manufacturing method for electrode plate, wet granular body of electrode active material mixture, and manufacturing apparatus for wet granular body of electrode active material mixture

Patent metadata

Field	Value
Publication number	US-2022263056-A1
Application number	US-202217579870-A
Country	US
Kind code	A1
Filing date	Jan 20, 2022
Priority date	Feb 16, 2021
Publication date	Aug 18, 2022
Grant date	—

Abstract

There are provided a method for manufacturing a wet granular body of an electrode active material mixture from which granular bodies with almost uniform grain size can be obtained, the wet granular body itself, a method for manufacturing an electrode plate using the same, and a manufacturing apparatus for the same. There are provided mixing of obtaining a wet powder body in a pendular state in which solid-matter powder includes at least electrode active material powder and conductive material powder, liquid components exist in facing portions of solid powder but the liquid components are not linked one another in the facing portions, and spaces among the solid powder are entirely linked, and granulating of obtaining an assembly of the wet granular body of the electrode active material mixture by forming the wet powder obtained in the mixing process into grains.

First claim

What is claimed is:

1 . A method for manufacturing a wet granular body of an electrode active material mixture, the method comprising:
mixing solid-matter powders including at least electrode active material powder and conductive material powder with liquid component to obtain a wet powder body in a pendular state in which the liquid component exists at facing portions of the solid-matter powder, the liquid component at the facing portions are not linked to one another, and vacancy among the solid-matter powders continues as a whole; and granulating to form the wet powder body obtained in the mixing into grains to obtain an assembly of wet granular bodies of the electrode active material mixture.

2 . The method for manufacturing the wet granular body of the electrode active material mixture according to claim 1 , wherein
the granulating includes:
bar-like shape forming to form the wet powder body into a bar-like shape, and
granular shape cutting to cut the wet powder body, which has been formed into the bar-like shape, to grains at plural points in a longitudinal direction of the wet powder body.

3 . The method for manufacturing the wet granular body of the electrode active material mixture according to claim 2 , wherein
the bar-like shape forming including:
plate-like shape forming to form the wet powder body into a plate-like shape; and
bar-like shape cutting to cut the wet powder body, which has been formed into the plate-like shape, to be in the bar-like shape along plural cutting lines arranged parallel to one another.

4 . A method for manufacturing an electrode plate having layers of wet body of an electrode active material mixture on a current collecting foil, the method using a three-piece roller including a first roller, a second roller, and a third roller, the three-piece roller configured such that the second roller faces both the first roller and the third roller, the first roller and the third roller are not facing each other, and the current collecting foil is placed on the third roller to pass through facing portions of the second roller and the third roller,
the method comprising:
layer forming to form a laminated layer of a wet granular body on a surface of the second roller by supplying the wet granular body of the electrode active material mixture to pass through facing portions of the first roller and the second roller; and
transferring to transfer the layer from the surface of the second roller to a surface of the current collecting foil while the layer is passing through the facing portions of the second roller and the third roller, wherein
the method uses a body manufactured by the method according to claim 1 as the wet granular body of the electrode active material mixture.

5 . A wet granular body of an electrode active material mixture manufactured by the method according to claim 1 .

6 . A manufacturing apparatus of a wet granular body of an electrode active material mixture configured such that:
the manufacturing apparatus includes a first roller and a second roller facing each other to rotate; at least any one of the first roller and the second roller is a blade-equipped roller formed on its surface with a plurality of circumferential grooves and protruding portions, each of which is of a blade-like shape and is formed between the respective grooves; the first roller and the second roller are configured to rotate at different peripheral speeds; and a bar-like formed product of the wet granular body of the electrode active material mixture supplied to facing portions of the first roller and the second roller is cut into grains by the protruding portions of the blade-equipped roller.

7 . A wet granular body of an electrode active material mixture manufactured by the method according to claim 2 .

8 . A wet granular body of an electrode active material mixture manufactured by the method according to claim 3 .

9 . A method for manufacturing an electrode plate having layers of wet body of an electrode active material mixture on a current collecting foil, the method using a three-piece roller including a first roller, a second roller, and a third roller, the three-piece roller configured such that the second roller faces both the first roller and the third roller, the first roller and the third roller are not facing each other, and the current collecting foil is placed on the third roller to pass through facing portions of the second roller and the third roller,
the method comprising:
layer forming to form a laminated layer of a wet granular body on a surface of the second roller by supplying the wet granular body of the electrode active material mixture to pass through facing portions of the first roller and the second roller, and
transferring to transfer the layer from the surface of the second roller to a surface of the current collecting foil while the layer is passing through the facing portions of the second roller and the third roller, wherein
the method uses a body manufactured by the method according to claim 2 as the wet granular body of the electrode active material mixture.

10 . A method for manufacturing an electrode plate having layers of wet body of an electrode active material mixture on a current collecting foil, the method using a three-piece roller including a first roller, a second roller, and a third roller, the three-piece roller configured such that the second roller faces both the first roller and the third roller, the first roller and the third roller are not facing each other, and the current collecting foil is placed on the third roller to pass through facing portions of the second roller and the third roller,
the method comprising:
layer forming to form a laminated layer of a wet granular body on a surface of the second roller by supplying the wet granular body of the electrode active material mixture to pass through facing portions of the first roller and the second roller; and
transferring to transfer the layer from the surface of the second roller to a surface of the current collecting foil while the layer is passing through the facing portions of the second roller and the third roller, wherein
the method uses a body manufactured by the method according to claim 3 as the wet granular body of the electrode active material mixture.

Assignees

• Prime Planet Energy & Solutions Inc

Inventors

• Ikeda Takenori
• Wakabayashi Yusuke

Classifications

• B01J2/00

  Processes or devices for granulating materials {, e.g. fertilisers} in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• B01J2/20

  by expressing the material, e.g. through sieves and fragmenting the extruded length · CPC title

• H01M4/0404 Primary

  by coating on electrode collectors · CPC title

• H01M4/139 Primary

  Processes of manufacture · CPC title