| US 7,575,606 B2 | ||
| Method for producing lithium ion secondary battery | ||
| Yusuke Fukumoto, Moriguchi (Japan); Tsumoru Ohata, Kyoto (Japan); and Tetsuya Hayashi, Kadoma (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Appl. No. 10/550,149 PCT Filed Feb. 17, 2005, PCT No. PCT/JP2005/002407 § 371(c)(1), (2), (4) Date Sep. 21, 2005, PCT Pub. No. WO2005/081336, PCT Pub. Date Sep. 01, 2005. |
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| Claims priority of application No. 2004-044290 (JP), filed on Feb. 20, 2004. | ||
| Prior Publication US 2006/0248710 A1, Nov. 09, 2006 | ||
| Int. Cl. H01M 10/04 (2006.01) | ||
| U.S. Cl. 29—623.1 [429/623.5] | 9 Claims |
| 1. A method for producing lithium ion secondary batteries, comprising the steps of:
(A) preparing an electrode sheet with lead-forming parts,
(B) intermittently forming porous insulating layers comprising an inorganic oxide filler and a binder on a surface of said
electrode sheet excluding said lead-forming parts,
(C) connecting a lead to each of said lead-forming parts, and
(D) fabricating batteries by using the electrode sheet to which said leads are connected,
wherein said step B comprises:
a step of applying a slurry comprising the inorganic oxide filler and the binder to the outer surface of a gravure roll, and
transferring the slurry applied to the outer surface of said gravure roll onto a surface of said electrode sheet that is being
transported by a plurality of guide rolls, excluding said lead-forming parts; and
a step of moving at least one selected from said gravure roll and said guide rolls to move said electrode sheet away from
said gravure roll at said lead-forming parts, wherein
said gravure roll is disposed between said plurality of guide rolls.
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