State estimation method and a battery pack
US11619672B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 2021 |
| Grant date | Apr 4, 2023 |
| Priority date | — |
| Expiry date | Aug 10, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This disclosure provides a state estimation method and a battery pack. The method includes: obtaining aging factor data, predetermined discharge data and predetermined capacity loss changing data; recording measured discharge data of a to-be-measured battery; calculating to obtain discharge voltage difference data according to the predetermined discharge data and the measured discharge data; determining a specific interval Sa according to the discharge voltage difference data, and obtaining a voltage difference statistical value ΔV2,Stats in the specific interval Sa; calculating an estimation capacity loss ΔQD of the to-be-measured battery according to the aging factor data and the voltage difference statistical value ΔV2,Stats; and determining whether the to-be-measured battery is abnormal or not according to the predetermined capacity loss changing data and the estimation capacity loss ΔQD.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.