Method for reconnecting a relay in a vehicle battery management system
First Claim
1. A method for reconnecting a relay in a vehicle battery management system comprising:
- measuring an insulation resistance between a positive electrode or a negative electrode of a battery and a vehicle chassis;
turning 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;
re-measuring the insulation resistance; and
performing 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.
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Accused Products
Abstract
A method for reconnecting a relay in a vehicle battery management system includes: measuring an insulation resistance between a positive electrode or a negative electrode of a battery and a vehicle chassis; turning 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; re-measuring the insulation resistance; and performing 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. 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.
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Citations
15 Claims
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1. A method for reconnecting a relay in a vehicle battery management system comprising:
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measuring an insulation resistance between a positive electrode or a negative electrode of a battery and a vehicle chassis; turning 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; re-measuring the insulation resistance; and performing 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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A vehicle battery management system comprising:
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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. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory computer readable medium containing program instructions for reconnecting a relay in a vehicle battery management system, the computer readable medium comprising:
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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.
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Specification