US 11,967,842 B2
Smart battery disconnect and protection architecture for airborne high-power modular multi-string battery pack
Vyacheslav Khozikov, Bellevue, WA (US); Frederic Lacaux, Woodinville, WA (US); Eugene V. Solodovnik, Lake Stevens, WA (US); John A. Trela, Seattle, WA (US); and Kamiar J. Karimi, Kirkland, WA (US)
Assigned to The Boeing Company, Arlington, VA (US)
Filed by The Boeing Company, Chicago, IL (US)
Filed on Jul. 13, 2021, as Appl. No. 17/373,838.
Claims priority of provisional application 63/089,729, filed on Oct. 9, 2020.
Prior Publication US 2022/0115878 A1, Apr. 14, 2022
Int. Cl. H02J 7/00 (2006.01)
CPC H02J 7/0031 (2013.01) [H02J 7/00714 (2020.01); H02J 7/007194 (2020.01)] 21 Claims
OG exemplary drawing
 
1. A battery system comprising:
positive and negative busbars;
a battery pack comprising a first battery string that includes first and second half-strings;
a first string contactor connected to the positive busbar and to the first half-string;
a first mid-point disconnect circuit connected to the first and second half-strings;
a first mid-point current sensor configured to measure current flowing through the first mid-point disconnect circuit; and
a first smart mid-point disconnect unit configured to open the first mid-point disconnect circuit following receipt of an output from the first mid-point current sensor indicating over-current flowing through the first mid-point disconnect circuit,
wherein the first smart mid-point disconnect unit is further configured to open the first string contactor after opening the first mid-point disconnect circuit.