On-line estimation method of battery state of health in wide temperature range based on “standardized temperature”
US11442113B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2021 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Jan 5, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/367
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An on-line State of Health estimation method of a battery in a wide temperature range based on “standardized temperature” includes: calculating battery Incremental Capacity curve of a battery, establishing a quantitative relationship between the voltage shift of the temperature-sensitive feature point and the temperature of a standard battery, standardized transformation of Incremental Capacity curves at different temperatures, establishing a quantitative relationship between the transformed height of the capacity-sensitive feature point and the State of Health based on a BOX-COX transformation. The BOX-COX transformation is expressed as An maximum likelihood function is used to calculate the optimal λ, and the transformed height of the capacity-sensitive feature point y can be acquired. The quantitative relationship between transformed height of the capacity-sensitive feature point and the State of Health is established to obtain the State of Health.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.