US 12,476,240 B2
Manufacturing apparatus and manufacturing method of electrode for secondary battery using laser, and electrode for secondary battery manufactured by the same
Taejong Kim, Daejeon (KR); Yujin Jeong, Daejeon (KR); Su Taek Jung, Daejeon (KR); Sangho Bae, Daejeon (KR); and Seong Won Choi, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/640,962
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Sep. 16, 2020, PCT No. PCT/KR2020/012512
§ 371(c)(1), (2) Date Mar. 7, 2022,
PCT Pub. No. WO2021/132848, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 10-2019-0173412 (KR), filed on Dec. 23, 2019.
Prior Publication US 2022/0344632 A1, Oct. 27, 2022
Int. Cl. H01M 4/04 (2006.01); B23K 26/08 (2014.01); B23K 26/082 (2014.01); B23K 26/362 (2014.01); H01M 4/02 (2006.01); H01M 4/13 (2010.01); H01M 4/139 (2010.01)
CPC H01M 4/0471 (2013.01) [B23K 26/362 (2013.01); H01M 4/0404 (2013.01); H01M 4/0435 (2013.01); H01M 4/13 (2013.01); H01M 4/139 (2013.01); H01M 2004/021 (2013.01)] 13 Claims
OG exemplary drawing
 
1. 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.