Abstract: A method of controlling contactor sequencing for a battery, wherein the battery comprises a circuit. The method comprises determining an architecture of the circuit, wherein the circuit comprises at least a positive contactor assembly and a negative contactor assembly. A direction of current flow through the circuit is determined. Ratings are determined for the positive and negative contactor assemblies for current flow in a first direction and a second direction. The method comprises determining a sequence of switching the contactor assemblies based on at least one of: the priorities assigned to the positive contactors; the priorities assigned to the negative contactors; the direction of current flow; the first and second ratings of the positive contactor assembly; and the third and fourth ratings of the negative contactor assembly. The method further comprises switching the contactor assemblies according to the sequence.

Abstract: In some implementations, a controller may select, using one or more selection criteria, a first battery string, from multiple battery strings of a battery pack, for a pre-charge operation of the battery pack. The controller may detect a failure of the pre-charge operation via a first pre-charge circuit of the first battery string. The controller may select, using the one or more selection criteria, a second battery string, from the multiple battery strings, for the pre-charge operation based on the failure meeting one or more failure conditions. The controller may perform, via a second pre-charge circuit of the second battery string, the pre-charge operation. The controller may configure the first battery string for operation based on the pre-charge operation via the second battery string being successful.