Fishman Stewart PLLC
Method and apparatus for uniform battery system state of charge management
A method and system for generating inverted electrical signals includes a first string of batteries connected in series, each battery having a half-bridge circuit connected in parallel and each having upper switch and lower switches. A first H-bridge circuit is connected in parallel with the first string of batteries, and a triangle wave generator generates a plurality of triangle wave signals at a given amplitude and carrier frequency. The plurality of triangle wave signals have individual triangle wave signals phase-shifted from one another. A modulation wave generator generates a modulation signal at a modulation amplitude and at twice a fundamental frequency that is less than the carrier frequency. A controller compares an instantaneous magnitude of the individual triangle wave signals to an instantaneous magnitude of the modulation signal, and outputs commands to the upper switch of a respective half-bridge circuit based on the comparison.
National Science Foundation
B B H B H H Y H H H H Y H H B Y Y
B60L B60L H02M B60L H02M H02M Y02T H02M H02M H02M H02J Y02T H02J H02M B60L Y02T Y02T
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Caisheng Jianfei Zuhair M.
Wang Chen Alaas