Method for reconnecting a relay in a vehicle battery management system

A vehicle battery management system comprising:

• a counter;
• an insulation resistance measurer configured to measure an insulation resistance between a positive electrode or a negative electrode of a battery and a vehicle chassis;
• and
• a controller configured to turn off each of relays connected between the positive and negative electrodes of the battery and a load when the measured insulation resistance is less than a reference value and to perform a relay-on sequence for turning on each of the relays when the resistance value of the insulation resistance, which is re-measured by the insulation resistance measurer, is greater than the reference value,
• wherein a coefficient of the counter is increased based on the insulation resistance measurement of the insulation resistance measurer, the insulation resistance re-measurement of the controller, and a repetition of a relay-on sequence, and a relay reconnection number of the relay-on sequence is set to a value less than a threshold value based on the coefficient of the counter.

A non-transitory computer readable medium containing program instructions for reconnecting a relay in a vehicle battery management system, the computer readable medium comprising:

• program instructions that measure an insulation resistance between a positive electrode or a negative electrode of a battery and a vehicle chassis;
• program instructions that turn off each of relays connected between the positive and negative electrodes of the battery and a load when the measured insulation resistance is less than a reference value;
• program instructions that re-measure the insulation resistance;
• and
• program instructions that perform a relay-on sequence for turning on each of the relays when the resistance value of the re-measured insulation resistance is greater than the reference value,
• wherein a relay reconnection number of the relay-on sequence, based on a repetition of the measuring and re-measuring, is set and limited so as to not exceed a threshold value.