Active isolation system for fuel cell
AssigneeGM Global Technology Operations LLC
InventorStephen Raiser
Life of this patent
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Abstract
A fuel cell system includes a fuel cell having conductive coolant flowing there through and a high voltage direct current (HVDC) bus interconnected with the fuel cell. An active isolation circuit includes coolant fault current sensors that detect a fault current (also called residual current) in the coolant and generates a fault signal when the fault current is detected. A switching circuit compensates and redirects the fault current based on the fault signal, providing active fault current limitation thereby.
Claims15
A fuel cell system, comprising:
- a fuel cell having coolant flowing therethrough;
- a high voltage direct current (HVDC) bus interconnected with said fuel cell;
- and
- an active isolation circuit for implementation with a fuel cell system having a coolant flowing therethrough, comprising:
- a first or multiple current sensor that detects a fault current in said coolant and generates a first fault signal when said fault current is detected;
- and
- a switching circuit that redirects said fault current based on said first fault signal.
An active isolation circuit of a fuel cell system having a coolant flowing therethrough, comprising:
- a current sensor that detects a fault current in said coolant and generates a fault signal when said fault current is detected;
- and
- a switching circuit that redirects said fault current based on said fault signal.
Dependencies are inferred from the claim text.