US 12,117,500 B2
Method and system to quickly analyze and predict battery failure and short-circuit
Bing-Joe Hwang, Taipei (TW); Sheng-Chiang Yang, Taipei (TW); Mohammad Kor, Taipei (TW); and Wei-Nien Su, Taipei (TW)
Assigned to National Taiwan University of Science and Technology, Taipei (TW)
Filed by National Taiwan University of Science and Technology, Taipei (TW)
Filed on Aug. 22, 2022, as Appl. No. 17/892,309.
Claims priority of application No. 111115319 (TW), filed on Apr. 21, 2022.
Prior Publication US 2023/0341470 A1, Oct. 26, 2023
Int. Cl. G01R 31/396 (2019.01); G01R 31/367 (2019.01); G01R 31/52 (2020.01)
CPC G01R 31/396 (2019.01) [G01R 31/367 (2019.01); G01R 31/52 (2020.01)] 7 Claims
OG exemplary drawing
 
1. A method to quickly analyze and predict battery failure and short-circuit comprising steps of:
obtaining a value of a condition of a battery cell unit by a sensor unit of a battery system;
the battery cell unit comprises a normal operation stage, a polarization stage and an Internal short-circuit stage in a one or multiple full cycle life times;
recognizing a type of the value of the condition of the battery cell unit and presenting as a time domain result, and moving to next step if the value is exceeding a preset first time domain threshold;
converting the time domain result in to a frequency domain result; and
issuing an alarm from the battery system if a value of the frequency domain result converted from the time domain result exceeds a preset second frequency domain threshold when a micro short-circuit happened during the normal operation stage of the battery cell unit.