US 12,474,117 B2
Automated system for drying conditions of electrodes for secondary battery
Sunhyung Kim, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 18/011,438
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Apr. 8, 2022, PCT No. PCT/KR2022/005146
§ 371(c)(1), (2) Date Dec. 19, 2022,
PCT Pub. No. WO2022/225237, PCT Pub. Date Oct. 27, 2022.
Claims priority of application No. 10-2021-0051620 (KR), filed on Apr. 21, 2021.
Prior Publication US 2023/0243585 A1, Aug. 3, 2023
Int. Cl. F26B 21/10 (2006.01); F26B 15/12 (2006.01); F26B 25/06 (2006.01); H01M 10/04 (2006.01)
CPC F26B 21/10 (2013.01) [F26B 15/122 (2013.01); F26B 25/06 (2013.01); H01M 10/0404 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An automated system for drying conditions of electrodes for secondary battery, the system comprising:
a transfer unit configured to transfer a preliminary electrode in which an electrode active material slurry is coated onto a current collector,
one or more drying units arranged along a transfer direction and configured to dry the preliminary electrode,
one or more sensors configured to measure an electrode temperature of the preliminary electrode in real time and to transmit information to a system control unit, and
a system control unit configured to receive information from the one or more sensors and to adjust the drying conditions,
wherein the adjustment of the drying conditions is to change the conditions when the information received from the sensors satisfies the following condition 1 or 2:
ΔT=T2−T1=T3−T1  [Condition 1]
wherein, T1 is the electrode temperature when there is no change in the electrode temperature of the preliminary electrode while the solvent evaporation of the electrode active material slurry is being performed, T2 is the electrode temperature of the preliminary electrode to be dried, and T3 is a value input in advance for the temperature at which thermal wrinkles start to generate according to the composition of the electrode active material slurry to be applied,

OG Complex Work Unit Math
wherein, α is the electrode temperature increase rate of the preliminary electrode, and β is the electrode temperature increase acceleration of the preliminary electrode.