Switching circuit for charge and discharge of multiple...

Details Switching circuit for charge and discharge of multiple... Switching circuit for charge and discharge of multiple...

2005-10-18

2005-10-18

Gelin, Jean (Department: 2681)

Telecommunications

Transmitter and receiver at same station

Having particular application of a transceiver

C455S572000

Reexamination Certificate

active

06957048

ABSTRACT:
Multiple battery systems and switching networks are provided for portable electronic devices. A single switching cell is provided per battery and a load switch coupled to a battery power bus to achieve proper connectivity and isolation between batteries, a load and a charger. The single switching cells are configured as a back-to-back MOSFET switch devices. The charger is also coupled to the battery power bus and can be enabled when AC power to the portable electronic device is not available. The present invention facilitates selective connection of battery packs in a multiple battery system to a load or a charger, while still maintaining isolation between battery packs, the load and the charger.

REFERENCES:
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Williams et al. “Single package 30-V Battery Disconnect Switch Facilitates Battery Multiplexing in Notebook Computers” Applied Power Electronics Conference and Exposition, 1998. Apec '98. Conference Proceedings 1998., Thirteenth Annual Anaheim, CA,. USA Feb. 15-19, 1998, New York, NY, USA, IEEE, US, Feb. 15, 1998, pp. 691-699, XP010263668 ISBN: 0-7803-4340-9 “figures 11, 17”.

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