Method and apparatus for estimating SOC-OCV profile
US11415631B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2019 |
| Grant date | Aug 16, 2022 |
| Priority date | — |
| Expiry date | Sep 7, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/392
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus estimating a state of charge (SOC)-open circuit voltage (OCV) profile, including: a storage unit storing: a beginning of life (BOL) positive electrode (PE) half-cell SOC-OCV profile and available range (AR), a BOL negative electrode (NE) half-cell SOC-OCV profile and AR, and a BOL full-cell SOC-OCV profile and total capacity (TC), and a control unit estimating a full-cell SOC-OCV profile at middle of life (MOL), including: an AR determination module for: calculating an MOL full-cell TC while a secondary battery is fully charged/discharged at MOL, and determining the MOL PE and NE ARs so a ratio of the MOL to the BOL full-cell TCs equals a ratio of the MOL to the BOL PE ARs and a ratio of the MOL to the BOL NE ARs, and a profile management module for: estimating, as an MOL full-cell SOC-OCV profile, a differential profile, and updating the BOL full-cell SOC-OCV profile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.