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US 7,507,435 B2Granted
Slitter apparatus and production method of electrode
AssigneeTDK Corporation
InventorsKazuo Katai, Yousuke Miyaki, Seiichi Endo
Life of this patent
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Abstract
An electrode production method has an active-material-containing layer forming step of applying an electrode-forming coating solution containing an electrode active material, a binder capable of binding the electrode active material, and a liquid capable of dissolving or dispersing the binder, onto a collector sheet, and thereafter removing the liquid to form an active-material-containing layer on the collector, thereby obtaining a electrode sheet; and an electrode forming step of cutting the electrode sheet with a slitter apparatus to obtain an electrode.
Claims2
An electrode production method comprising:
- an active-material-containing layer forming step of applying an electrode-forming coating solution containing an electrode active material, a binder capable of binding the electrode active material, and a liquid capable of dissolving or dispersing the binder, onto a collector sheet, and thereafter removing the liquid to form an active-material-containing layer on the collector, thereby obtaining an electrode sheet;
- and
- an electrode forming step of cutting the electrode sheet with a slitter apparatus to obtain an electrode, the slitter apparatus comprising:
- a rotary shaft provided with one or more circular upper blades at a predetermined interval, and a rotary shaft provided with one or more circular lower blades at a predetermined interval, the rotary shafts being arranged in parallel with each other and at such a spacing as to achieve a predetermined engagement depth with contact between a side face of a peripheral part of the upper blades and a side face of a peripheral part of the lower blades,
- wherein a thickness of the upper blades is not less than 1 mm,
- wherein an included angle of the upper blades is in a range of 75 to 88°,
- wherein hardnesses of the upper blades and the lower blades are in a range of 6.9×103 to 8.8×103 N/mm2, and a difference between the hardness of the upper blades and the hardness of the lower blades is not more than 4.9×102 N/mm2, and
- wherein surface roughnesses of the upper blades and the lower blades are not more than 4 μm, and a difference between the surface roughness of the upper blades and the surface roughness of the lower blades is not more than 2 μm.
5 more elements
An electrode production method comprising:
- an active-material-containing layer forming step of applying an electrode-forming coating solution containing an electrode active material, a binder capable of binding the electrode active material, and a liquid capable of dissolving or dispersing the binder, onto a collector sheet, and thereafter removing the liquid to form an active-material-containing layer on the collector, thereby obtaining an electrode sheet;
- and
- an electrode forming step of cutting the electrode sheet with a slitter apparatus to obtain an electrode, the slitter apparatus comprising:
- a rotary shaft provided with one or more circular upper blades at a predetermined interval, and a shaft provided with one or more linear lower blades at a predetermined interval and in parallel, and arranged to be normal to edge faces of the lower blades, the shafts being arranged in parallel with each other and at such a spacing as to achieve a predetermined engagement depth with contact between a side face of a peripheral part of the upper blades and a side face of a peripheral part of the lower blades,
- wherein a thickness of the upper blades is not less than 1 mm,
- wherein an included angle of the upper blades is in a range of 75 to 88°,
- wherein hardnesses of the upper blades and the lower blades are in a range of 6.9×103 to 8.8×103 N/mm2, and a difference between the hardness of the upper blades and the hardness of the lower blades is not more than 4.9×102,and
- wherein surface roughnesses of the upper blades and the lower blades are not more than 4 μm, and a difference between the surface roughness of the upper blades and the surface roughness of the lower blades is not more than 2 μm.
5 more elements
Dependencies are inferred from the claim text.