Methods and apparatus for real-time characterization of batteries with a reference electrode
US9847558B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2014 |
| Grant date | Dec 19, 2017 |
| Priority date | — |
| Expiry date | Nov 11, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The disclosed battery system comprises a three-electrode metal-ion battery configured with voltage meters connected between anode and cathode, between anode and a reference electrode, and between cathode and the reference electrode; a current source connecting the anode and cathode; and a programmable computer. The system is configured to control the current source to drive the battery with a current cycling profile, and to measure current signals between anode and cathode, and voltage signals derived from the voltage meters. An impulse response is then calculated for each of the anode and cathode, to dynamically estimate open-circuit potential and impedance of each of the anode and cathode. Battery aging, battery capacity fading, and other diagnostics are provided in real time. This invention can characterize each individual electrode of a battery, even when the battery is cycling away from equilibrium states, which is important for electric vehicles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.