US 11,658,499 B2
Battery diagnosis apparatus
Bohyun Lee, Incheon (KR); Won Jae Choi, Seoul (KR); Ju Seok Kim, Suwon-si (KR); Jaekyung Oh, Yongin-si (KR); Sangwon Lee, Daegu (KR); Hee Yeon Ryu, Yongin-si (KR); Chulkyu Lee, Anyang-si (KR); Woojin Choi, Seoul (KR); Seungjune Lee, Seoul (KR); and Farhan Farooq, Seoul (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); KIA CORPORATION, Seoul (KR); and FOUNDATION OF SOONGSIL UNIVERSITY-INDUSTRY COOPERATION, Seoul (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); KIA CORPORATION, Seoul (KR); and FOUNDATION OF SOONGSIL UNIVERSITY—INDUSTRY COOPERATION, Seoul (KR)
Filed on Nov. 24, 2021, as Appl. No. 17/535,238.
Claims priority of application No. 10-2021-0011173 (KR), filed on Jan. 27, 2021.
Prior Publication US 2022/0239128 A1, Jul. 28, 2022
Int. Cl. H02J 7/00 (2006.01); G01R 31/389 (2019.01); G01R 31/392 (2019.01); H03F 3/45 (2006.01)
CPC H02J 7/0047 (2013.01) [G01R 31/389 (2019.01); G01R 31/392 (2019.01); H02J 7/00032 (2020.01); H02J 7/0071 (2020.01); H03F 3/45 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A battery diagnosis apparatus comprising:
a data obtaining device configured to output a perturbation signal;
a signal regulating device configured to generate a current by applying the perturbation signal to a battery and performing feedback of a current signal output from the battery; and
a noise canceling device configured to cancel noises of the current signal and a voltage signal received from the battery,
wherein the data obtaining device outputs the perturbation signal while changing a frequency, obtains an impedance spectrum based on the noise-canceled current signal and voltage signal for each frequency, and determines whether to reuse the battery based on the obtained impedance spectrum, and
wherein the signal regulating device comprises:
a first amplifier provided to amplify the perturbation signal;
a switch provided to be turned on by the amplified perturbation signal and induce a current of the battery; and
a second amplifier provided to feed back a current signal for the induced current of the battery to the first amplifier.