Contact Resistance Abnormality Diagnosis Method and Contact Resistance Abnormality Diagnosis System

A contact resistance abnormality diagnosis system, comprising:

• a memory that stores a connector contact abnormality diagnosis program for a swappable battery pack;
• a processor configured to execute the connector contact abnormality diagnosis program to determine states of a battery connector of the battery pack that is connected to a plurality of system connectors of each of a plurality of battery swapping systems (BSSs) by a first connector assembly at a plurality of first time points and to each of a plurality of vehicle connectors of a plurality of vehicles by a second connector assembly at a plurality of second time points, the plurality of system connectors and the plurality of vehicle connectors;
• and
• a sensor configured to receives a plurality of first contact resistance values for the first connector assembly corresponding to the plurality of first time points from the plurality of BSSs, and a plurality of second contact resistance values for the second connector assembly corresponding to the plurality of second time points from the plurality of vehicles,
• wherein the processor is configured to
• arrange the plurality of first contact resistance values and the plurality of second contact resistance values in an order of time of each of the plurality of first times and and each of the plurality of second times to generate a log table, and determines the states of the battery connector, the plurality of system connectors, and the plurality of vehicle connectors based on the log table.