Circuits and methods for impedance determination using active measurement cancelation
A delta signal and opposite delta signal are generated such that a sum of the two signals is substantially zero. The delta signal is applied across a first set of electrochemical cells. The opposite delta signal is applied across a second set of electrochemical cells series connected to the first set. A first held voltage is established as the voltage across the first set. A second held voltage is established as the voltage across the second set. A first delta signal is added to the first held voltage and applied to the first set. A second delta signal is added to the second held voltage and applied to the second set. The current responses due to the added delta voltages travel only into the set associated with its delta voltage. The delta voltages and the current responses are used to calculate the impedances of their associated cells.
- Research Organization:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC07-05ID14517
- Assignee:
- Battelle Energy Alliance, LLC (Idaho Falls, ID)
- Patent Number(s):
- 9,519,031
- Application Number:
- 14/108,068
- OSTI ID:
- 1335819
- Resource Relation:
- Patent File Date: 2013 Dec 16
- Country of Publication:
- United States
- Language:
- English
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