US 11,735,782 B2
Voltage sharing of series connected battery modules in a plug-and-play DC microgrid
Mohamed Ahmed Kamel Ahmed, Logan, UT (US); Regan Zane, Hyde Park, UT (US); and Dragan Maksimovic, Boulder, CO (US)
Assigned to Utah State University, Logan, UT (US)
Filed by Mohamed Ahmed Kamel Ahmed, Logan, UT (US); Regan Zane, Hyde Park, UT (US); and Dragan Maksimovic, Boulder, CO (US)
Filed on Jun. 17, 2021, as Appl. No. 17/350,880.
Claims priority of provisional application 63/040,431, filed on Jun. 17, 2020.
Prior Publication US 2021/0399352 A1, Dec. 23, 2021
Int. Cl. H01M 10/44 (2006.01); H02J 7/00 (2006.01); H01M 10/48 (2006.01); H01M 10/42 (2006.01)
CPC H01M 10/441 (2013.01) [H01M 10/4257 (2013.01); H01M 10/482 (2013.01); H02J 7/007182 (2020.01); H01M 2010/4271 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a battery module controller; and
a battery management system,
wherein the battery module controller:
generates, for an mth converter of N converters connected together to a DC microbus, a droop current ĩd,m comprising a converter voltage error signal verr,m multiplied by a non-linear droop multiplier gd(i), wherein each converter of the N converters is a DC/DC converter connected between a battery module and the DC microbus, the battery module comprising one or more battery cells,
wherein the mth converter uses the droop current ĩd,m, a common current reference ĩall of a battery pack comprising the battery modules connected to the N converters and an input current ĩm to the mth converter to control switching of the mth converter, the common current reference ĩall provided by the battery management system, and
wherein the voltage error signal verr,m is based on an output voltage vo,m of the mth converter and an average converter output voltage vavg.