Power distribution unit and fuse management for an electric mobile application

A system, comprising:

• a vehicle having a motive electrical power path;
• a power distribution unit comprising a current protection circuit disposed in the motive electrical power path, the current protection circuit comprising a thermal fuse and a contactor in a series arrangement with the thermal fuse;
• a current source circuit electrically coupled to the thermal fuse and structured to inject a current across the thermal fuse;
• and
• a voltage determination circuit electrically coupled to the thermal fuse and structured to determine at least one of an injected voltage amount and a thermal fuse impedance value.

A method for determine null offset voltage for a fuse current measurement system, comprising:

• determining that no current is demanded for a fuse load for a fuse electrically disposed between an electrical power source and an electrical load;
• determining a null offset voltage in response to no current demanded for the fuse load;
• and
• storing the null offset voltage.

A system, comprising:

• a vehicle having a motive electrical power path;
• a power distribution unit having a current protection circuit disposed in the motive electrical power path, the current protection circuit comprising:
• a first leg of the current protection circuit comprising a pyro-fuse;
• a second leg of the current protection circuit comprising a thermal fuse;
• and
• wherein the first leg and the second leg are coupled in a parallel arrangement;
• a controller, comprising:
• a current detection circuit structured to determine a current flow through the motive electrical power path;
• and
• a pyro-fuse activation circuit structured to provide a pyro-fuse activation command in response to the current flow exceeding a threshold current flow value;
• and
• wherein the pyro-fuse is responsive to the pyro-fuse activation command.