US 12,103,419 B2
Board charger controller for vehicle, system including the same, and method thereof
Sang Kyu Lee, Gyeonggi-do (KR); Jin Gyu Lim, Gyeongsangbuk-do (KR); and Seung Myun Chung, Seoul (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Motors Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Motors Corporation, Seoul (KR)
Filed on Sep. 28, 2020, as Appl. No. 17/034,060.
Claims priority of application No. 10-2020-0053890 (KR), filed on May 6, 2020.
Prior Publication US 2021/0347277 A1, Nov. 11, 2021
Int. Cl. B60L 53/62 (2019.01); B60L 53/50 (2019.01); H02J 7/04 (2006.01)
CPC B60L 53/62 (2019.02) [B60L 53/50 (2019.02); H02J 7/04 (2013.01); H02J 2310/48 (2020.01)] 5 Claims
OG exemplary drawing
 
1. An on board charger (OBC) controller for vehicle, comprising:
a measurement device configured to measure a voltage of each phase of a three-phase OBC; and
a controller configured to:
calculate an impedance of each phase using a voltage of each phase;
increase current supplied to each phase, after measuring the voltage of each phase before the charging starts;
operate the measurement device to measure a voltage of each phase of the three-phase OBC, after increasing the current;
calculate a charging amount for each phase, the charging amount corresponding to the impedance of each phase; and
adjust charging based on the calculated charging amount for each phase,
wherein calculating the impedance of each phase comprises:
calculating a phase difference between the voltage of each phase and a current of each phase;
calculating a voltage drop value which is a difference value between the voltage of each phase measured before the charging starts and the voltage of each phase measured after the current is increased; and
calculating the impedance of each phase of the three-phase OBC based on the voltage drop value and the phase difference between the voltage of each phase and the current of each phase; and
wherein at least one load is connected to each phase, and the impedance changes according to the at least one load.