Method and device for detecting abnormality of lithium battery, battery management system, and battery system
US11906590B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2022 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | Sep 8, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J2310/48
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Embodiments of this application provide a method and a device for detecting abnormality of a lithium battery, a battery management system, and a battery system. The method includes: obtaining a SOC value of the lithium battery in a charge process, where the SOC value is a ratio of a remaining capacity of the battery to a nominal capacity of the battery; changing a value of a charge current at a time point corresponding to an arbitrary SOC value, and obtaining a response signal within a time period of maintaining the changed charge current; and determining, based on response signals at time points corresponding to a plurality of SOC values, whether the lithium battery is abnormal. The method can implement non-destructive detection of abnormality of a lithium-ion battery, simplify operation, and achieve relatively high accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.