ENERGY STORAGE - SCANIA CV ABP

Title:

ENERGY STORAGE

Document Type and Number:

WIPO Patent Application WO/2004/105209

Kind Code:

A1

Abstract:

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_TOT) is received and DC-to-DC converted into one voltage fraction (V₁, V₂) per electrical storage module. The respective voltage fractions (V₁, V₂) are delivered to each module and varied over time (t) within an interval (V_D) around a respective nominal module voltage (V_1n, V_2n). 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.

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Inventors:

LINDSTROEM JOHAN (SE)

Application Number:

PCT/SE2004/000657

Publication Date:

December 02, 2004

Filing Date:

April 29, 2004

Export Citation:

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Assignee:

SCANIA CV ABP (SE)
LINDSTROEM JOHAN (SE)

International Classes:

H02J7/00; (IPC1-7): H02J7/00

Foreign References:

US6275004B1	2001-08-14
US6462511B1	2002-10-08

Attorney, Agent or Firm:

Egrelius, Fredrik (Patents UTY byggnad 117, Södertälje, SE)

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