Power delivery control system for an electric vehicle and diagnostic method therefor

A power delivery control system configured for selectively delivering power from a battery to a power stage of a vehicle, the power delivery control system comprising:

• a contactor module, comprising:
• a first switched non-current-limiting path connectable between a first polarity of the battery and a first polarity of the power stage of the vehicle,
• a first switched current-limiting path mounted in parallel with the first switched non-current-limiting path,
• a second switched non-current-limiting path connectable between a second polarity of the battery and a second polarity of the power stage of the vehicle,
• a second switched current-limiting path mounted in parallel with the second switched non-current-limiting path,
• a voltage sensor configured for measuring an output voltage of the contactor module between the first and second polarities of the power stage of the vehicle;
• and
• a motor control module operatively connected to the first and second switched non-current-limiting paths, to the first and second switched current-limiting paths, and to the voltage sensor, the motor control module being configured for:
• a) initiating a start procedure in response to receiving a command for the start procedure,
• b) after a), during the start procedure, selectively closing the first switched current-limiting path,
• c) after b), during the start procedure, in response to a magnitude of the output voltage being less than a first voltage threshold, opening the first switched current-limiting path and closing the second switched current-limiting path,
• d) after c), during the start procedure, in response to the magnitude of the output voltage being less than the first voltage threshold, closing the first switched current-limiting path,
• e) after d), during the start procedure, in response to the magnitude of the output voltage increasing to meet or exceed a second voltage threshold greater than the first voltage threshold, closing the first and second switched non-current-limiting paths.