Doctor blade, coating device, and method for producing laminated separator

Patent metadata

Field	Value
Publication number	US-2017259293-A1
Application number	US-201715451794-A
Country	US
Kind code	A1
Filing date	Mar 7, 2017
Priority date	Mar 8, 2016
Publication date	Sep 14, 2017
Grant date	—

Abstract

Wearing down of a doctor blade by a filler contained in a coating solution is prevented. The doctor blade is for scraping off the coating solution, containing the filler, from a circumferential surface of a coating roller, the coating roller being for applying the coating solution to a battery member being conveyed. A surface of the doctor blade is made from an ultra-high molecular weight polyethylene.

First claim

1 . A doctor blade for scraping off a coating solution, containing a filler, from a circumferential surface of a coating roller, the coating roller being for applying the coating solution to a battery member being conveyed, the doctor blade comprising:
a surface made from a non-conductive material.

2 . The doctor blade as set forth in claim 1 , wherein the non-conductive material contains a resin.

3 . The doctor blade as set forth in claim 2 , wherein the resin contains an ultra-high molecular weight polyethylene.

4 . The doctor blade as set forth in claim 3 , wherein an edge section of the doctor blade is thinner than a base section of the doctor blade so that the doctor blade has a stepped shape, the edge section and the base section each being plate-shaped.

5 . The doctor blade as set forth in claim 1 , wherein:
an edge section of the doctor blade, which edge section is plate-shaped, has a contact surface which is pressed onto the circumferential surface of the coating roller; and a bevel angle formed by the contact surface and a surface of the edge section is less than 60° but not less than 30°.

6 . The doctor blade as set forth in claim 4 , wherein:
the edge section has a contact surface which is pressed onto the circumferential surface of the coating roller; and a bevel angle formed by the contact surface and a surface of the edge section is less than 60° but not less than 30°.

7 . The doctor blade as set forth in claim 1 , wherein the battery member is a separator.

8 . The doctor blade as set forth in claim 1 , wherein the filler is an inorganic filler.

9 . The doctor blade as set forth in claim 1 , wherein the filler has a Mohs hardness of not less than 4.

10 . The doctor blade as set forth in claim 1 , wherein the filler contains an inorganic oxide.

11 . A coating device comprising:
a coating roller for applying a coating solution, containing a filler, to a battery member being conveyed; and a doctor blade for scraping off the coating solution from a circumferential surface of the coating roller, the doctor blade including a surface made from a non-conductive material.

12 . A method for producing laminated separator, the method comprising:
forming a coating layer on a separator by applying a coating solution to the separator by use of the coating device recited in claim 11 .

Assignees

• Sumitomo Chemical Co

Inventors

• SHIBA Ryutaro
• Innami Toshiki

Classifications

• B05C11/045 Primary

  characterised by the blades themselves · CPC title

• B05C1/0817 Primary

  characterised by means for removing partially liquid or other fluent material from the roller, e.g. scrapers (coating roller co-operating with dosing rollers B05C1/0834) · CPC title

• B05D2252/02

  of indefinite length · CPC title

• H01M50/451

  comprising layers of only organic material and layers containing inorganic material · CPC title

• H01M50/403 Primary

  Manufacturing processes of separators, membranes or diaphragms · CPC title