Btech Inc.

Allan J Baum, Jr

Edward M Potempa

Thomas J Leonard

George A Pedersen

A complex impedance battery monitor has one or more primary switches, a load resistor in series with the primary switches, a current sensor in series with the primary switches, two or more lead wires connected to two or more busbars in a string of batteries, and a digital signal processor. The primary switches are connected to two or more terminals of the batteries in the string of batteries. The primary switches are turned on and off to produce a ripple current in the string of batteries. The digital signal processor determines at least a portion of the complex impedance of at least one of the batteries by analyzing the voltage and current waveform of the ripple current. The primary switches may be turned on and off with a pulse width modulated wave.

Complex impedance battery monitor

A battery monitor control system has a load plate, two or more lead wires connected to two or more busbars in a string of batteries, and a digital signal processor. The load plate has one or more primary switches connected to two or more terminals of the batteries in the string of batteries. The load plate also has a load resistor and a current sensor. The primary switches are turned on and off to produce a ripple current in the string of batteries. The digital signal processor determines the real portion of the complex impedance of at least one of the batteries by analyzing the voltage and current waveform of the ripple current. The primary switches may be turned on and off with a sine wave modulation.

Battery monitor control system

A battery monitoring system for simultaneously managing the batteries in 100 or more remote locations, each with 100 or fewer cells, has an individual battery monitor operatively engaged with at least one of the cells, a network access module in communication with the battery monitor, and a battery manager that has a fixed IP address that can be connected via an M2M data protocol to the battery monitor. The network access module is programmed to periodically transfer battery monitor data, including ohmic measurements, to the battery manager at a frequency of not less than once per week and with a total rate of data transfer of not more than 1 Mb per month. When the network access module initiates contact with the battery manager, the M2M data communication protocol assigns a variable IP address to the modem of the network access module.

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Oak Ridge, NJ, United States of America

Allan J Baum, Jr