Multicell battery system with individually controllable cell bypasses
First Claim
1. A multicell battery system with individually controllable cell bypasses, comprising:
- at least two battery cells;
a single AC power source having an AC output; and
means for selectively accomplishing a cell bypass of each of the battery cells, the means for accomplishing including means for selectively bypassing a single battery cell, the means for selectively bypassing a single battery cell includinga 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, andmeans for selectively activating the MOSFET gate using the AC output and for maintaining the MOSFET gate active.
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Accused Products
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.
55 Citations
11 Claims
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1. A multicell battery system with individually controllable cell bypasses, comprising:
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at least two battery cells; a single AC power source having an AC output; and means for selectively accomplishing a cell bypass of each of the battery cells, the means for accomplishing including means for selectively bypassing a single battery cell, the means for selectively bypassing a single battery cell including 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 means for selectively activating the MOSFET gate using the AC output and for maintaining the MOSFET gate active. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A multicell battery system with individually controllable cell bypasses, comprising:
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a plurality of battery cells; a single AC power source having an AC output signal; and a selective cell bypass of each of the battery cells, each cell bypass comprising 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 comprising an AND gate having as one input the AC output signal, and as a second input a selection signal, and having an AND gate output signal, a capacitor having a first electrode in communication with the AND gate output signal and a second electrode, and a cascade voltage doubling circuit having an input in communication with the second electrode of the capacitor and an output in communication with the MOSFET gate. - View Dependent Claims (9, 10, 11)
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Specification