| 摘要 |
<p>The present invention relates to storage of electrical energy in a number of electrical storage modules, which are connected in series to one another. A DC-system voltage (V<SUB>TOT</SUB>) is received and DC-to-DC converted into one voltage fraction (V<SUB>1</SUB>, V<SUB>2</SUB>) per electrical storage module. The respective voltage fractions (V<SUB>1</SUB>, V<SUB>2</SUB>) are delivered to each module and varied over time (t) within an interval (V<SUB>D</SUB>) around a respective nominal module voltage (V<SUB>1n</SUB>, V<SUB>2n</SUB>). Thereby, the charging voltage is temporarily increased to a level which is sufficiently high to obtain an improved load capacity for each module. At the same time, the overall voltage over the electrical storage modules may be held at a harmless level with respect to any units that are included in the relevant electric circuitry.</p> |
