US 12,487,201 B2
Method for diagnosing lithium plating in lithium ion batteries by using electrochemical impedance spectroscopy
Sonia Dandl, Munich (DE); Peng Dong, Beijing (CN); Edwin Knobbe, Pfaffenhofen an der Ilm (DE); Sebastian Scharner, Tuerkenfeld (DE); Peng Wu, Tianjin (CN); and Jianbo Zhang, Beijing (CN)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 18/022,456
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Aug. 19, 2021, PCT No. PCT/EP2021/073074
§ 371(c)(1), (2) Date Feb. 21, 2023,
PCT Pub. No. WO2022/038237, PCT Pub. Date Feb. 24, 2022.
Claims priority of application No. 202010847320.6 (CN), filed on Aug. 21, 2020.
Prior Publication US 2024/0035995 A1, Feb. 1, 2024
Int. Cl. G01N 27/02 (2006.01); G01R 31/36 (2020.01); G01R 31/389 (2019.01); G01R 31/392 (2019.01); G01R 31/396 (2019.01)
CPC G01N 27/026 (2013.01) 13 Claims
OG exemplary drawing
 
1. A method for detecting an occurrence of lithium plating on an anode of a lithium ion battery using an electrochemical workstation during testing of the lithium ion battery, the method comprising:
conducting, using the electrochemical workstation, electrochemical impedance spectroscopy measurements on the anode of a complete/undisassembled lithium ion battery under different temperature conditions;
obtaining electrochemical impedance spectroscopy curves at the different temperature conditions;
arranging the electrochemical impedance spectroscopy curves in a Nyquist plot; and
determining an occurrence of lithium plating on the anode according to the arrangement of the electrochemical impedance spectroscopy curves,
wherein the determination of the occurrence of lithium plating on the anode is made without disassembling the complete/undisassembled lithium ion battery.