US 12,146,920 B2
System and method for diagnosing battery
Woo Sung Kim, Hwaseong-si (KR); Ki Seung Baek, Hwaseong-si (KR); and Sung Il Lee, Hwaseong-si (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA CORPORATION, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Nov. 4, 2021, as Appl. No. 17/518,986.
Claims priority of provisional application 63/110,744, filed on Nov. 6, 2020.
Prior Publication US 2022/0146583 A1, May 12, 2022
Int. Cl. G01R 31/389 (2019.01); B60L 3/00 (2019.01); B60L 50/60 (2019.01); B60L 58/10 (2019.01); B60L 58/12 (2019.01); B60L 58/16 (2019.01); B60L 58/21 (2019.01); G01R 31/367 (2019.01); G01R 31/3835 (2019.01); G01R 31/3842 (2019.01); G01R 31/392 (2019.01); G05B 23/02 (2006.01); G07C 5/00 (2006.01); G07C 5/08 (2006.01); H01M 10/42 (2006.01); H01M 10/48 (2006.01)
CPC G01R 31/389 (2019.01) [B60L 3/0046 (2013.01); B60L 50/60 (2019.02); B60L 58/10 (2019.02); B60L 58/12 (2019.02); B60L 58/16 (2019.02); B60L 58/21 (2019.02); G01R 31/367 (2019.01); G01R 31/3835 (2019.01); G01R 31/3842 (2019.01); G01R 31/392 (2019.01); G07C 5/008 (2013.01); G07C 5/0825 (2013.01); H01M 10/425 (2013.01); H01M 10/482 (2013.01); H01M 10/486 (2013.01); B60L 2240/545 (2013.01); B60L 2240/547 (2013.01); G05B 23/0218 (2013.01); G05B 23/0256 (2013.01); H01M 2010/4271 (2013.01); H01M 2220/20 (2013.01)] 13 Claims
OG exemplary drawing
 
8. A battery diagnosis method comprising steps of:
receiving battery information of a battery of a car that is parked, the battery comprising multiple battery cells;
applying alternating current signals having different frequencies to each of the battery cells of the battery;
measuring impedance of each of the battery cells through the received battery information;
determining, based on a comparison between impedance of a normal battery cell of the battery and impedance of an abnormal battery cell of the battery, that a battery cell having the impedance of the abnormal battery cell among the battery cells of the battery is the abnormal battery cell; and
after the step of determining that a battery cell having the impedance of the abnormal battery cell among the battery cells of the battery is the abnormal battery cell, transferring normal battery and abnormal battery information,
wherein the step of transferring normal battery and abnormal battery information comprises transferring malfunction diagnosis information of the battery based on a malfunction type, and
wherein a type of a battery damage cause is identified based on the comparison between the impedance of the normal battery cell and the impedance of the abnormal battery cell and a shape of a total impedance graph of the abnormal battery cell.