Method for balancing battery pack energy levels
US6271645A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2000 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Feb 11, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and circuit for balancing energy levels among first and second battery groups within a battery pack are provided. The first and second battery groups are connected across a first current bus that may, for example, provide power for an electric motor of an electric vehicle. The first battery group is also connected across a second current bus that may, for example, provide current to vehicle electrical systems such as lighting systems. The method includes the steps of generating a first state of charge value indicative of a first energy level in the first battery group and generating a second state of charge value indicative of a second energy level in the second battery group. The method also includes the step of controlling the first energy level responsive to the first and second state of charge values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.