Patent ID: 11901595
Assignee: HYUNDAI MOTOR COMPANY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 0:
1. A system for measuring impedance of a fuel cell stack, the system comprising:
an energy consumption device, a cooling device, and a battery connected in parallel to a main bus end of a fuel cell stack;
a relay provided at the main bus end and configured to electrically connect or disconnect the cooling device and the battery to or from the fuel cell stack;
an impedance measurement unit configured to apply an AC current to the fuel cell stack and to measure the impedance of the fuel cell stack; and
a controller configured to turn off the relay during measurement of the impedance of the fuel cell stack,
wherein the impedance measurement unit is configured such that a current application line is electrically connected to a partial cell section of the fuel cell stack and a voltage measurement line is electrically connected to a cell section having a narrower range than a range of the current application line, and
wherein the energy consumption device is directly connected to the fuel cell stack or the impedance measurement unit separately from the main bus end.