US 6,639,383 B2 · Multiple energy storage device controller

Abstract

A system for controlling multiple energy storage devices in an uninterruptible power supply (UPS) system is provided. In one embodiment of the invention, the system generally includes a charger coupled to a direct current (DC) bus of the UPS system, and two or more energy storage circuits, each of which includes a power regulator coupled to the charger and coupled to the DC bus, at least one energy storage device coupled to the power regulator, and a processor coupled to the power regulator for controlling the charge and discharge of the at least one energy storage device. In another embodiment of the invention, digital communication between two or more controllers is accomplished over the DC bus through use of the Control Area Network (CAN) protocol.

Claims21

Dependent claims

An uninterruptible power supply system comprising:

an input for receiving power;
an output for providing power;
a direct current (DC) line coupled to the input;
an output circuit coupled to the DC line and the output;
a plurality of DC power sources coupled to the DC line;
a power controller coupled to at least a first DC power source of the DC power sources and configured to control at least one of amounts of charge power transferred from the DC line to the first DC power source and amounts of discharge power transferred from the first DC power source to the DC line.

3 more elements

Dependencies are inferred from the claim text.

Multiple energy storage device controller

Life of this patent

Multiple energy storage device controller

Life of this patent

Abstract

Claims21