Impedance determination with phase determination
US12000903B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2020 |
| Grant date | Jun 4, 2024 |
| Priority date | — |
| Expiry date | Apr 14, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for the correction of synchronization errors Δt in the measurement of the impedance of an electrical or electrochemical component, more particularly a lithium ion cell is provided. In general, synchronization errors in an impedance measurement can arise between the excitation and response signals, which can misrepresent the phase of the impedance value obtained. According to the method, the synchronization error can be determined by measuring the impedance at two different frequencies and solving an optimization problem in respect of the deviation of the phases from an equivalent circuit diagram, which comprises at least one resistance and an inductance. The phase of the impedance value obtained can be corrected in this way.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.