Patent ID: 11967842
Assignee: THE BOEING COMPANY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC H

Claim 16:
17. 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 mid-point disconnect circuit connected to the first and second half-strings;
a mid-point current sensor configured to measure current flowing through the mid-point disconnect circuit;
a smart mid-point disconnect unit configured to open the mid-point disconnect circuit following receipt of an output from the mid-point current sensor indicating over-current flowing through the mid-point disconnect circuit;
an electric propulsion controller; and
a battery pack management system which is communicatively coupled to the smart mid-point disconnect unit and to the electric propulsion controller,
wherein the battery pack management system is configured to output a power limit command to the electric propulsion controller to trim power drawn from the battery pack, the power limit command being based on a number of battery strings available, a state of charge of the battery strings, and a mission profile.