Systems, methods, and devices for state-of-health estimation in energy storage systems
US11821958B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2022 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Jan 26, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems, methods, and devices are provided for estimating a state-of-health (SOH) in an energy storage system, where the estimate accounts for both power fade and capacity fade. The SOH estimation system comprises a SOH estimation module configured to receive, and to determine the estimate of the SOH based on: a nominal capacity input; a voltage input; a current input; a nominal open circuit voltage curve; an operational resistance model; a nominal resistance model; an operational dynamic model; and a rated discharge current. The SOH estimation module may further comprise a SOH aggregation module configured to receive a power rating estimate, PRn, and a normalized capacity estimate, NCn, and may be configured to determine the estimate of the SOH based on the power rating estimate, PRn, and the normalized capacity estimate, NCn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.