Method for manufacturing secondary cell electrode composite slurry and manufacturing device

Patent metadata

Field	Value
Publication number	US-2023290924-A1
Application number	US-202318173077-A
Country	US
Kind code	A1
Filing date	Feb 23, 2023
Priority date	Mar 14, 2022
Publication date	Sep 14, 2023
Grant date	—

Abstract

An object is to provide a method for manufacturing an electrode composite slurry and a manufacturing device which can continuously manufacture an electrode composite slurry and suppress the production of faulty products. A method for continuously manufacturing a secondary cell electrode composite slurry is provided, and the method includes: a dispersing-kneading step of continuously dispersing and kneading the material of the electrode composite slurry; a first property measurement step of measuring the property of the electrode composite slurry that has been dispersed and kneaded; a redispersing-kneading step of redispersing and kneading the electrode composite slurry; and a property determination step of determining whether or not the redispersing-kneading step is performed based on the result of the measurement in the first property measurement step.

First claim

What is claimed is:

1 . A method for continuously manufacturing a secondary cell electrode composite slurry, the method comprising:
a dispersing-kneading step of continuously dispersing and kneading a material of the electrode composite slurry; a first property measurement step of measuring a property of the electrode composite slurry that has been dispersed and kneaded; a redispersing-kneading step of redispersing and kneading the electrode composite slurry; and a property determination step of determining whether or not the redispersing-kneading step is performed based on a result of the measurement in the first property measurement step.

2 . The method for manufacturing a secondary cell electrode composite slurry according to claim 1 , wherein the first property measurement step includes measuring at least an impedance of the electrode composite slurry.

3 . The method for manufacturing a secondary cell electrode composite slurry according to claim 1 , wherein the first property measurement step includes measuring an impedance and a viscosity of the electrode composite slurry.

4 . The method for manufacturing a secondary cell electrode composite slurry according to claim 1 , further comprising: a magnetic separation step of removing a magnetic metal by performing magnetic separation on the electrode composite slurry that has been dispersed and kneaded in the dispersing-kneading step,
wherein the first property measurement step includes measuring a property of the electrode composite slurry on which the magnetic separation has been performed in the magnetic separation step.

5 . The method for manufacturing a secondary cell electrode composite slurry according to claim 1 , wherein at least one of a dispersing-kneading torque and an amount of solvent in the dispersing-kneading step is adjusted according to the property of the electrode composite slurry measured in the first property measurement step.

6 . The method for manufacturing a secondary cell electrode composite slurry according to claim 1 , further comprising: a second property measurement step of measuring a property of the electrode composite slurry that has been redispersed and kneaded in the redispersing-kneading step.

7 . A manufacturing device for continuously manufacturing a secondary cell electrode composite slurry, the manufacturing device comprising:
a dispersion kneader that continuously disperses and kneads a material of the electrode composite slurry; a first property measurer that measures a property of the electrode composite slurry which has been dispersed and kneaded; a redispersion kneader that redisperses and kneads the electrode composite slurry; and a controller that determines whether or not a redispersing-kneading step is performed based on a result of the measurement performed by the first property measurer.

8 . The manufacturing device for manufacturing a secondary cell electrode composite slurry according to claim 7 , wherein the first property measurer measures at least an impedance of the electrode composite slurry.

9 . The manufacturing device for manufacturing a secondary cell electrode composite slurry according to claim 7 , wherein the first property measurer measures at least an impedance and a viscosity of the electrode composite slurry.

10 . The manufacturing device for manufacturing a secondary cell electrode composite slurry according to claim 7 , further comprising: a magnetic separator that removes a magnetic metal by performing magnetic separation on the electrode composite slurry which has been dispersed and kneaded by the dispersion kneader,
wherein the first property measurer is arranged at a stage subsequent to the magnetic separator.

11 . The manufacturing device for manufacturing a secondary cell electrode composite slurry according to claim 7 , wherein the controller adjusts at least one of a torque of the dispersion kneader and an amount of solvent according to the property of the electrode composite slurry measured with the first property measurer.

12 . The manufacturing device for manufacturing a secondary cell electrode composite slurry according to claim 7 , further comprising: a second property measurer that measures a property of the electrode composite slurry which has been redispersed and kneaded by the redispersion kneader.

13 . The manufacturing device for manufacturing a secondary cell electrode composite slurry according to claim 7 , wherein the redispersion kneader comprises:
a tube; a turned portion that is arranged inside the tube and is turnable around a central axis of the tube; and a flow path which is provided between the tube and the turned portion and through which the electrode composite slurry can flow.

Assignees

• Honda Motor Co Ltd

Inventors

• Mori Keiko
• KATSUYAMA Yasuro
• Kunigami Masaki
• Yoshida Shohei
• Yonezawa Satoshi

Classifications

• H01M4/043 Primary

  involving compressing or compaction · CPC title

• B01F35/2136

  Viscosity · CPC title

• B01F23/581 Primary

  Mixing liquids with solids, slurries or sludge, for obtaining a diluted slurry · CPC title

• B01F27/50

  Pipe mixers, i.e. mixers wherein the materials to be mixed flow continuously through pipes, e.g. column mixers · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title