US 11,721,992 B2
System and method for supplying power from a multi-cell battery to a single-cell power management system
Peter J. Bartels, Loxahatchee, FL (US); Javier Alfaro, Miami, FL (US); and Kevin D. Elliott, Lake In The Hills, IL (US)
Assigned to MOTOROLA SOLUTIONS, INC., Chicago, IL (US)
Filed by MOTOROLA SOLUTIONS, INC., Chicago, IL (US)
Filed on Jul. 23, 2020, as Appl. No. 16/937,377.
Prior Publication US 2022/0029435 A1, Jan. 27, 2022
Int. Cl. H02J 7/00 (2006.01)
CPC H02J 7/0047 (2013.01) [H02J 7/0013 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for supplying power from a multi-cell battery to a single-cell power management integrated circuit, the system comprising:
a first power terminal for receiving a positive battery terminal voltage signal from the multi-cell battery;
a second power terminal for receiving a cell voltage signal from the multi-cell battery;
a voltage converter circuit configured to scale the positive battery terminal voltage signal to generate a scaled voltage signal;
a control circuit configured to:
detect whether the multi-cell battery is a regulated multi-cell battery or an unregulated multi-cell battery based on a voltage at the second power terminal,
select one of the scaled voltage signal or the cell voltage signal based on the detection, and
output a high-impedance single-cell power signal including the selected one of the scaled voltage signal or the cell voltage signal;
a signal buffer circuit configured to buffer the high-impedance single-cell power signal to generate a low-impedance single-cell power signal; and
a third power terminal for sending the low-impedance single-cell power signal to a voltage sense pin of the single-cell power management integrated circuit.