Electrical transmission or interconnection systems – Plural supply circuits or sources – Load current control
Reexamination Certificate
1999-08-17
2001-03-27
Fleming, Fritz (Department: 2836)
Electrical transmission or interconnection systems
Plural supply circuits or sources
Load current control
C307S048000
Reexamination Certificate
active
06208039
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to apparatus for supplying electrical power, and more particularly to a method for reducing wear on a plurality of parallel connected batteries by controlling each battery to share a load element equally.
2. Prior Art
Prior techniques for connecting multiple parallel batteries included techniques for over-sizing the battery cell capacity to account for loss, or providing a relay and switch matrix to compensate for multiple battery cell failures. Such prior techniques are costly and inefficient.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a highly efficient apparatus to reduce wear on a plurality of parallel connected batteries.
Another object of the present invention is to provide apparatus wherein each battery in a plurality of parallel connected batteries is controlled to share a load equally. Still another object of the present invention is to provide an apparatus for a plurality of parallel connected batteries that provides a high level of fault tolerance while minimizing the number of components.
Other and further features, advantages and benefits of the invention will become apparent in the following description taken in conjunction with the following drawing. It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory but are not to be restrictive of the invention. The accompanying drawing which is incorporated in and constitute a part of this invention and, together with the description, serves to explain the principles of the invention in general terms. Like numerals refer to like parts throughout the disclosure.
REFERENCES:
patent: 3956638 (1976-05-01), Ahrens et al.
patent: 3987352 (1976-10-01), Hirota
patent: 5175531 (1992-12-01), Whitmire et al.
Canzano Steven M.
Mendelsohn Aaron J.
Fleming Fritz
Perman & Green LLP
Space Systems Loral, Inc.
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