US 12,244,171 B2
Battery-ultracapacitor hybrid energy storage system architecture for mild-hybrid power systems
Subbarao Varigonda, Columbus, IN (US); Jaroslaw Leonarski, Columbus, IN (US); and Harsha R. Ademane, Indianapolis, IN (US)
Assigned to Cummins Inc., Columbus, IN (US)
Filed by Cummins Inc., Columbus, IN (US)
Filed on Feb. 27, 2024, as Appl. No. 18/589,120.
Application 18/589,120 is a continuation of application No. 17/433,116, granted, now 11,967,854, previously published as PCT/US2020/014736, filed on Jan. 23, 2020.
Claims priority of provisional application 62/833,823, filed on Apr. 15, 2019.
Prior Publication US 2024/0283280 A1, Aug. 22, 2024
Int. Cl. H02J 7/34 (2006.01); B60K 6/28 (2007.10); H01M 10/44 (2006.01); H01M 10/0525 (2010.01); H01M 10/48 (2006.01)
CPC H02J 7/345 (2013.01) [B60K 6/28 (2013.01); H01M 10/44 (2013.01); H01M 10/0525 (2013.01); H01M 10/48 (2013.01); H01M 2220/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A mild hybrid energy storage system architecture, the mild hybrid energy storage system architecture comprising:
a battery;
an ultracapacitor connected in parallel with the battery;
a battery main contactor connected to a terminal of the battery;
a passive battery pre-charge circuit connected in parallel across the battery main contactor;
an ultracapacitor main contactor connected to a terminal of the ultracapacitor; and
a passive ultracapacitor pre-charge circuit connected in parallel to the ultracapacitor main contactor;
a control module configured to:
provide engine start-up functions by directing the battery to defer pre-charge of the ultracapacitor; and
isolate the ultracapacitor by opening both an ultracapacitor pre-charge switch of the passive ultracapacitor pre-charge circuit and the ultracapacitor main contactor at engine shutdown.