Estimation method of battery state of health based on standard sample and dual-embedded decoupling
US11474159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2022 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Jan 10, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/388
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A battery State of Health estimation method based on a standard sample and a dual-embedded decoupling includes the steps of extracting significant characteristic peaks of the standard sample, mechanism parameter calibration of the standard sample, and on-line State of Health estimation of the test battery. The battery State of Health estimation method expounds the dual coupling relationship between temperature and aging on the characteristic peak voltage of Incremental Capacity curve from the perspective of impedance characteristic mechanism analysis, and proposes a method eliminating the voltage deviation caused by the most temperature-sensitive charge transfer resistance based on the “standard sample” to realize the decoupling of the first layer. Further, when the Solid Electrolyte Interface film resistance affected by the aging and temperature coupling conforms to a linear relationship as a whole, the embedded decoupling can be realized by establishing the relation function between the linear relationship coefficient and temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.