Method for the resistive cell equalization of battery cells of a battery, a battery which is controlled in accordance with the method, and a motor vehicle
US9252619B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2013 |
| Grant date | Feb 2, 2016 |
| Priority date | — |
| Expiry date | May 7, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for the resistive charge equalization of battery cells of a battery, includes, in a first step, ascertaining the state of charge of the battery cells ascertained and correlating the battery cells of which the state of charge exceeds a predefined value with a first mask, which permits charge equalization only for a predefined portion of all the battery cells, wherein, then, charge equalization is performed. In a second step, the state of charge of the battery cells is optionally ascertained again and the battery cells of which the state of charge exceeds a predefined value are correlated with a second mask, which differs from the first mask, and wherein, then, charge equalization is performed. As a result, the heat generated during charge equalization is distributed in space and time such that no local overheating of or damage to components occurs and no overtemperature disconnection of the battery occurs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.