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

Claim 6:
7. The battery system as recited in claim 6, further comprising:
a fourth string contactor connected to the negative busbar and to the fourth half-string;
a first end-point current sensor configured to measure current flowing through the first string contactor; and
a second end-point current sensor configured to measure current flowing through the third string contactor,
wherein the battery pack management system is configured to:
compute a first difference between the currents measured by the first mid-point current sensor and first end-point current sensor;
open the first mid-point disconnect circuit in response to the first difference being greater than a specified threshold and then open the first and second string contactors;
compute a second difference between the currents measured by the second mid-point current sensor and second end-point current sensor; and
open the second mid-point disconnect circuit in response to the second difference being greater than the specified threshold and then open the third and fourth string contactors.