Abstract
The present disclosure provides methods for determining impedance of an electrochemical device by electrically connecting a variable impedance in parallel with the electrochemical device; electrically connecting a power supply to the electrochemical device, the power supply generating a power supply current; modulating a current through the variable impedance; measuring a stack current flowing through the electrochemical device; measuring, at the electrochemical device, a voltage across at least a portion of the electrochemical device; and calculating, based on the measured stack current and the measured voltage, the impedance of the electrochemical device. Systems for performing such methods are also provided.
| Original language | American English |
|---|---|
| Patent number | 11,733,190 B2 |
| Filing date | 22/08/23 |
| State | Published - 2023 |
NREL Publication Number
- NREL/PT-5900-87312
Keywords
- electrical impedance
- electrochemical storage
- variable impedance