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US 12,476,240 B2Granted
Manufacturing apparatus and manufacturing method of electrode for secondary battery using laser, and electrode for secondary battery manufactured by the same
AssigneeLG Energy Solution, Ltd.
InventorsTaejong Kim, Yujin Jeong, Su Taek Jung, Sangho Bae, Seong Won Choi
Life of this patent
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Abstract
Provided are a manufacturing apparatus and a manufacturing method of an electrode for a secondary battery which forms a large number of holes in the electrode mixture having a level difference in thickness, by irradiating twice or less with a nanosecond laser, and an electrode for a secondary battery manufactured by the same.
Claims13
An apparatus for manufacturing an electrode for a secondary battery, comprising:
- a roller-shaped unwinder on which a sheet type current collector is wound;
- a transfer roller configured to continuously transfer the sheet type current collector;
- a coater configured to coat an electrode active material slurry on at least one surface of the sheet type current collector;
- a dryer configured to dry the coated electrode active material slurry to form an electrode mixture on at least one surface of the sheet type current collector;
- a roller configured to roll the electrode mixture through a pair of rollers;
- a laser adapted to subject the electrode mixture to laser etching to form a plurality of holes having thicknesses, thereby manufacturing an electrode sheet;
- and,
- a roller-shaped rewinder configured to rewind the electrode sheet,
- wherein the laser is a nanosecond laser, and is adapted to form respective holes by performing irradiation twice or less,
- wherein the nanosecond laser satisfies the following conditions 1 to 4:
- [Condition 1]
- Average Power:
- 26 W to 100 W,
- [Condition 2]
- Repetition Rate:
- 28 kHz to 70 kHz,
- [Condition 3]
- Pulse Duration:
- 55 ns to 220 ns,
- [Condition 4]
- Pulse Energy:
- 0.28 mJ to 2.84 mJ.
19 more elements
A method for manufacturing an electrode for a secondary battery, the method comprising:
- (a) preparing an electrode slurry containing an active material;
- (b) coating the electrode slurry onto at least one surface of a sheet type current collector to be transferred, and drying the same to form an electrode mixture, and rolling the electrode mixture;
- and
- (c) subjecting the electrode mixture to laser etching to form a large number of holes having a level difference in thickness, thereby manufacturing an electrode sheet;
- wherein the laser etching (c) performs irradiation twice or less with a nanosecond laser to form respective holes;
- and wherein the nanosecond laser satisfies the following conditions 1 to 4:
- [Condition 1] Average Power:
- 26 W to 100 W,
- [Condition 2] Repetition Rate:
- 28 kHz to 70 kHz,
- [Condition 3] Pulse Duration:
- 55 ns to 220 ns,
- [Condition 4] Pulse Energy:
- 0.28 mJ to 2.84 mJ.
11 more elements
Dependencies are inferred from the claim text.