Method and apparatus for improving cycle life capacity of a battery pack
US9787106B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2012 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | May 10, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00714
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method (900) of reducing variation of an energy storage capacity of a battery across its cycle life is disclosed. The method can include the step (901) of monitoring one or more voltages of one or more cells of a battery for a predetermined discharge usage time. Where a profile of the one or more voltages during the predetermined discharge usage time meets a predefined usage criterion, the method can include the step (907) of increasing a discharge voltage limit of the one or more cells. An energy management circuit (614) can be configured with a control circuit (702) operable to increase the discharge limit and to limit discharge of the cells when the discharge limit is reached.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.