US 12,244,173 B2
Bidirectional battery charge-discharge control
Matthias J. Kasper, Villach (AT); Luca Peluso, Villach (AT); and Gerald Deboy, Klagenfurt (AT)
Assigned to Infineon Technologies Austria AG, Villach (AT)
Filed by Infineon Technologies Austria AG, Villach (AT)
Filed on Dec. 21, 2022, as Appl. No. 18/085,630.
Application 18/085,630 is a division of application No. 17/112,577, filed on Dec. 4, 2020, granted, now 11,569,681.
Prior Publication US 2023/0124533 A1, Apr. 20, 2023
Int. Cl. H02J 9/00 (2006.01); H02J 7/04 (2006.01); H02J 9/06 (2006.01); H02M 3/335 (2006.01)
CPC H02J 9/062 (2013.01) [H02J 7/04 (2013.01); H02M 3/33584 (2013.01); H02J 2207/20 (2020.01)] 13 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a bidirectional power converter;
an energy storage resource;
a capacitor; and
a controller operative to:
i) monitor a magnitude of an input voltage supplied to a load from an input voltage source, and
ii) based on a magnitude of the input voltage, switch between a first mode of operating the bidirectional power converter to charge the energy storage resource using the input voltage and a second mode of operating the bidirectional power converter to produce a backup voltage from the energy storage resource to power the load;
the apparatus further comprising:
a first circuit path including the capacitor disposed in series with the energy storage resource between a first node and a second node, a third node of the first circuit path directly coupling the capacitor to the energy storage resource, wherein the first node of the capacitor is operative to receive the input voltage while the bidirectional power converter is operated in the first mode;
wherein the bidirectional power converter, while in the first mode, is operative to convert the input voltage received from the first node into a charging voltage supplied to the third node to charge the energy storage resource;
wherein the bidirectional power converter, while in the second mode, is operative to: i) from the third node, receive a supply voltage from the energy storage resource; ii) convert the supply voltage into the backup voltage; and
iii) output the backup voltage to the first node; and
wherein the first circuit path is disposed in parallel with the load in which: i) a first terminal of the load is directly coupled to the first node, and ii) a second terminal of the load is directly coupled to the second node.