US 12,230,992 B2
On-board charger (OBC) method and system for detecting phase configuration of mains supply and for diagnosing status of OBC phase configuration relays
Jordi Tost Bartolome, Valls (ES); Cesar Ruano Alvarez, Valls (ES); Josep Ruiz Rodon, Valls (ES); Andre Cartaxo, Valls (ES); and Adria Marcos Pastor, Valls (ES)
Assigned to Lear Corporation, Southfield, MI (US)
Filed by Lear Corporation, Southfield, MI (US)
Filed on Oct. 25, 2021, as Appl. No. 17/509,245.
Claims priority of provisional application 63/143,117, filed on Jan. 29, 2021.
Prior Publication US 2022/0247199 A1, Aug. 4, 2022
Int. Cl. H02J 7/00 (2006.01); B60L 53/24 (2019.01); H02J 7/02 (2016.01); H02J 7/04 (2006.01)
CPC H02J 7/00712 (2020.01) [B60L 53/24 (2019.02); H02J 7/02 (2013.01); H02J 7/04 (2013.01); B60L 2210/30 (2013.01); H02J 2207/20 (2020.01); H02J 2310/48 (2020.01)] 20 Claims
OG exemplary drawing
 
1. An on-board battery charger (OBC) comprising:
a first rail circuit having a first rail controller configured to generate a first detection signal based on voltage events of an input voltage supplied to the first rail circuit;
a second rail circuit having a second rail controller configured to generate a second detection signal based on voltage events of an input voltage supplied to the second rail circuit;
a relay switchable between (i) an opened state in which the relay disconnects the rail circuits whereby the first and second rail circuits are configured to respectively receive first and second phase input voltages from a multi-phase mains supply and (ii) a closed state in which the relay connects the rail circuits whereby the rail circuits are configured to both receive a same input voltage from a single-phase mains supply; and
a main controller configured to determine from a comparison of the first detection signal at a given time and the second detection signal at the given time whether an input voltage supplied from a mains supply to the first rail circuit and an input voltage supplied from the mains supply to the second rail circuit are out-of-phase or in-phase to determine therefrom whether the mains supply is a multi-phase or single-phase mains supply and/or whether the relay is properly or improperly positioned in the opened state or in the closed state.