US 12,348,071 B2
Activation protocol generating method, and activation method and device using same
Sung-Sik Hyun, Daejeon (KR); Hyun Park, Daejeon (KR); and Hyun-Tae Kim, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/796,716
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Oct. 15, 2021, PCT No. PCT/KR2021/014413
§ 371(c)(1), (2) Date Aug. 1, 2022,
PCT Pub. No. WO2022/080973, PCT Pub. Date Apr. 21, 2022.
Claims priority of application No. 10-2020-0134301 (KR), filed on Oct. 16, 2020.
Prior Publication US 2023/0061221 A1, Mar. 2, 2023
Int. Cl. H02J 7/00 (2006.01)
CPC H02J 7/0069 (2020.01) [H02J 7/0042 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of generating a charge/discharge protocol of an additional charging/discharging operation included in an activation method, the activation method comprising a jig formation operation, an aging operation, and the additional charging/discharging operation with respect to assembled secondary batteries, the charge/discharge protocol generation method comprising:
operation (a) of measuring a secondary battery thickness increase rate over time while repeating charging/discharging between a first voltage and a second voltage higher than the first voltage with respect to a first secondary battery of the assembled secondary batteries;
operation (b) of performing, at least once, an operation of performing operation (a) with respect to a different secondary battery of the assembled secondary batteries that is a same model as the first secondary battery, after fixing the second voltage and changing the first voltage;
operation (c) of determining one of first voltages except for a first voltage at a lowest rate among measured secondary battery thickness increase rates, as a lower limit voltage; and
operation (d) of setting a protocol to repeat charging/discharging between the lower limit voltage and the second voltage.