Measuring device and method for determining an electrical property
US12164006B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2021 |
| Grant date | Dec 10, 2024 |
| Priority date | — |
| Expiry date | Apr 26, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention concerns a measuring device configured to be connected to first and second terminals of an electric device, such as a battery cell, and to determine at least one electrical property of the electric device. The measuring device comprises an impedance measuring arrangement configured to, when the electric device is connected to the first and second terminals, connect the electric device to a measurement circuit, wherein the impedance measuring arrangement is further configured to: provide a time-varying test current (Itest) through the measurement circuit; measure a voltage (Ucell) over the electric device while the time-varying test current (Itest) is provided; and determine a phase shift and a magnitude ratio between the measured voltage (Ued) and the time-varying test current (Itest) in the measurement circuit, wherein the time-varying test current (Itest) comprises a plurality of superimposed discrete frequencies, wherein said discrete frequencies are distributed over a frequency range and separated from each other so as to avoid frequency overlap due to spread spectrum between adjacent frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.