System and method for battery charge control based on a cycle life parameter
US7245107B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2003 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | May 9, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0069
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charging and discharging strategy for a rechargeable battery pack is disclosed. The strategy involves monitoring and learning the battery pack's condition (a cycle life parameter) in terms of its progression through its life cycle. The life cycle parameter may be determined as a function of both time (i.e., the battery pack's age) as well as the number of discharge/recharge cycles. The strategy intentionally under-utilizes the battery during the initial stages of its life, based on the cycle life parameter, by charging it to a first level less then the maximum state of charge. This approach reduces charge voltages, reducing stress on the battery's active materials, thereby increasing its life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.