US 11,757,364 B2
Parallel interleaving operated bidirectional DC-DC converter and method and apparatus for controlling the same
Hyun Woo Shim, Suwon-si (KR); Deok Kwan Choi, Yongin-si (KR); Won Gon Kim, Yongin-si (KR); Min Heo, Seongnam-si (KR); Kang Min Kim, Seoul (KR); A Ra Lee, Seongnam-si (KR); Tae Ho Bang, Seoul (KR); Ji Hoon Park, Suwon-si (KR); Du Ho Kim, Yongin-si (KR); and Soo Min Jeon, Yongin-si (KR)
Assigned to HYUNDAI MOBIS Co., Ltd., Seoul (KR)
Filed by HYUNDAI MOBIS Co., Ltd., Seoul (KR)
Filed on Nov. 22, 2021, as Appl. No. 17/532,494.
Claims priority of application No. 10-2020-0158123 (KR), filed on Nov. 23, 2020.
Prior Publication US 2022/0166332 A1, May 26, 2022
Int. Cl. H02M 3/335 (2006.01); B60L 53/20 (2019.01); H02M 1/00 (2006.01); B60L 58/20 (2019.01)
CPC H02M 3/33584 (2013.01) [B60L 53/20 (2019.02); B60L 58/20 (2019.02); H02M 1/0009 (2021.05); B60L 2210/12 (2013.01); B60L 2210/14 (2013.01); H02M 3/3353 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A parallel interleaving operated bidirectional DC-DC converter which is a low voltage DC-DC converter (LDC) as a direct current power supply device for a vehicle, the converter comprising
two or more bidirectional DC-DC converters connected in parallel between a first battery and a second battery, a discharge voltage of the first battery being relatively higher than that of the second battery,
each of the bidirectional DC-DC converters connected in parallel includes:
a first current sensor configured to detect a current of a high voltage stage of each of the bidirectional DC-DC converters during the buck mode operation; and
a second current sensor configured to detect a current of a low voltage stage of each of the bidirectional DC-DC converters during a bidirectional operation,
wherein, among the bidirectional DC-DC converters, an interleaving operation is performed on switching of a power semiconductor included in one bidirectional DC-DC converter with respect to switching of power semiconductors included in other bidirectional DC-DC converters to perform a buck mode operation or a boost mode operation.