Method for estimating battery degradation
US9229064B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2012 |
| Grant date | Jan 5, 2016 |
| Priority date | — |
| Expiry date | May 4, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/392
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for estimating battery degradation is provided. In this method, a remaining capacity is obtained by looking up a device characteristic table according to a steady open circuit voltage of a battery. Besides, a constant current is provided to charge the battery, and when a terminal voltage of the battery reaches to a charging preset voltage, a constant voltage is provided to charge the battery. The transition point information at the transition from a constant current mode to a constant voltage mode, which includes a transition point estimated open circuit voltage, a transition point voltage, a transition point current and a transition point battery temperature, is analyzed based on voltage, current, temperature and capacity information measured during the charging process. A battery degradation index is calculated from the transition point information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.