US 12,282,068 B2
Lithium precipitation detecting apparatus and method
Seung-Hyun Kim, Daejeon (KR); Hyun-Chul Lee, Daejeon (KR); Dong-Keun Kwon, Daejeon (KR); An-Soo Kim, Daejeon (KR); and Chae-Bin Shin, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 18/008,330
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Apr. 1, 2022, PCT No. PCT/KR2022/004718
§ 371(c)(1), (2) Date Dec. 5, 2022,
PCT Pub. No. WO2022/231150, PCT Pub. Date Nov. 3, 2022.
Claims priority of application No. 10-2021-0055289 (KR), filed on Apr. 28, 2021.
Prior Publication US 2023/0288487 A1, Sep. 14, 2023
Int. Cl. G01R 31/385 (2019.01); G01R 31/396 (2019.01); H01M 10/44 (2006.01); H02J 7/00 (2006.01)
CPC G01R 31/385 (2019.01) [G01R 31/396 (2019.01); H01M 10/44 (2013.01); H02J 7/0048 (2020.01)] 15 Claims
OG exemplary drawing
 
1. A lithium precipitation detecting apparatus, comprising:
a measuring unit configured to electrically connect to a battery cell to measure a charge current of the battery cell in a charging process and a discharge current of the battery cell in a discharging process, calculate a charge amount of the battery cell based on the measured charge current in the charging process and calculate a discharge amount of the battery cell based on the measured discharge current in the discharging process; and
a control unit configured to estimate a state of charge (SOC) of the battery cell in the charging process and the discharging process and determine whether lithium precipitation occurs in the battery cell based on the estimated SOC, the charge amount and the discharge amount,
wherein the control unit is configured to compare magnitudes of the charge amount of the battery cell and the discharge amount of the battery cell and determine whether the lithium precipitation occurs in the battery cell according to a comparison result, and
wherein the control unit is configured to set a charging C-rate and a discharging C-rate based on a determination result and send information on the charging C-rate and the discharging C-rate to a charging and discharging device external to the lithium precipitation detecting apparatus.