System and method to measure series-connected cell voltages using a flying capacitor
US7679369B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2007 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Oct 8, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R35/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method for measuring voltage of individual cells connected in series includes a single flying capacitor. The capacitor stores the charge of one of the cells such that an analog-to-digital converter (ADC) connected to the capacitor may process an accurate representation of the voltage of the cell being measured. A plurality of switches electrically connects and disconnects the cells from the capacitor. A controller is in communication with the ADC and the switches for sequencing the switches and recording the voltage measurements of each cell. At least one precision voltage reference device is included to provide the ADC a reference voltage to provide self-calibration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.