Apparatus for measuring cell internal resistance online and measurement method therefor
US10281529B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2014 |
| Grant date | May 7, 2019 |
| Priority date | — |
| Expiry date | Apr 28, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for online measurement of a battery internal resistance and a measurement method thereof are disclosed and applicable to online measure the internal resistance of a monomer cell in the battery, which include an excitation source circuit, electrically connected between any two monomer cells to be detected and a battery end and forming a loop respectively or simultaneously with the two monomer cells; an analog-to-digital conversion unit, for detecting and converting a response voltage of the monomer cell ends, and simultaneously electrically connected to the loop formed with the two monomer cells, for detecting and converting a current in the loop as well as detecting and converting a phase value between the current and the response voltage; a digital signal processing unit, electrically connected to the analog-to-digital conversion unit, for calculating the internal resistance value of the monomer cell to be detected after receiving a conversion signal from the analog-to-digital conversion unit; and realize precise, efficient and convenient internal resistance measurement of the monomer cell without damaging the monomer cell and sacrificing the online load of the batter…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.