System and method for maintaining insulation resistance of fuel cell
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorHyun Hie Kim
Life of this patent
Estimating the term…
Abstract
A system for maintaining insulation resistance of a fuel cell includes a fuel cell stack, a coolant line that allows coolant to pass through the fuel cell stack, a circulation pump that circulates the coolant in the coolant line, a deionizer that removes impurities or ions from the coolant in the coolant line, and a controller configured to measure the insulation resistance of a high-voltage terminal connected to the fuel cell stack, to determine whether recovery control is necessary based on the measured insulation resistance, and upon determining that recovery control is necessary, to control the circulation pump so as to change the flow of the coolant passing through the deionizer.
Claims6
A method of maintaining an insulation resistance of a fuel cell, the method comprising:
- measuring, by a controller, the insulation resistance of a high-voltage terminal connected to a fuel cell stack;
- determining, by the controller, whether recovery control for restoring the insulation resistance is necessary based on the measured insulation resistance;
- and
- upon determining that recovery control is necessary, changing a flow of coolant passing through a deionizer for removing impurities or ions from the coolant in a coolant line for cooling the fuel cell stack,
- wherein in determining whether recovery control is necessary, when a magnitude of the measured insulation resistance is equal to or less than a predetermined first resistance value, it is determined that recovery control is necessary, and
- wherein the predetermined first resistance value is set to be greater than an existing insulation resistance abnormality diagnosis reference value.
Dependencies are inferred from the claim text.