Multicell battery system with individually controllable cell byp

Details Multicell battery system with individually controllable cell byp Multicell battery system with individually controllable cell byp

1995-08-21

1997-07-22

Maples, John S.

Chemistry: electrical current producing apparatus, product, and

With control means responsive to battery condition sensing...

429 90, 337 15, H01M 234

Patent

active

056502400

ABSTRACT:
A multicell battery system includes at least two battery cells, and a selective cell bypass for each of the battery cells. Each cell bypass includes a metal-oxide-semiconductor field effect transistor (MOSFET) having a source, a drain, and a gate, a first electrical interconnection from the MOSFET source to a first side of the battery cell, a second electrical interconnection from the MOSFET drain to a second side of the battery cell, and an activation circuit connected to the MOSFET gate. The activation circuit includes an AND gate having as one input an AC square wave signal and as a second input a selection signal, a capacitor connected to the AND gate output signal, and a cascade voltage doubling circuit having an input in communication with a second electrode of the capacitor and an output in communication with the MOSFET gate.

REFERENCES:
patent: 5180641 (1993-01-01), Burns et al.
patent: 5258244 (1993-11-01), Hall et al.
patent: 5549984 (1996-08-01), Dougherty

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