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Electrical and Wave

Device-for-and-method-of-switching-and-monitoring-batteries

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Device for and method of switching and monitoring batteries

Details

Inventors: Rockenbauch, Craig A.;
Assignee: The United States of America as represented by the National Security (Washington, DC)
Primary Examiner: Wong; Peter S.
Assistant Examiner: Luk; Lawrence
Attorney, Agent or Firm: Morelli; Robert D.

The present invention is a device for switching and monitoring batteries for powering a battery-operated device that includes an n-to-1 multiplexer; batteries; a sensor array; a controller; a receiver; a transmitter; and diodes for selectively connecting power for the multiplexer, the sensor array, the controller, the receiver, and the transmitter.

DETAILED DESCRIPTION It is an object of the present invention to switch between parallel-connected batteries when the battery in use dies.
It is another object of the present invention to switch between parallel-connected batteries when the battery in use dies while control circuitry is powered by the batteries which are isolated from each other by diodes.
It is another object of the present invention to switch between parallel-connected batteries by remote control based on telemetry concerning the voltage profile, current profile, and/or the temperature profile of the battery in use.
It is another object of the present invention to switch between parallel-connected batteries when the battery in use dies and to gauge the remaining operating life of a device powered by the parallel-connected batteries.
The present invention is a device for and method of switching and monitoring batteries.
The device includes an n-to-1 multiplexer.
Upon command, the n-to-1 multiplexer connects one of the n multiplexer inputs to its output.
In the preferred embodiment, the n-to-1 multiplexer includes a mode where none of the inputs are connected to the output of the n-to-1 multiplexer.
In the present invention, when none of the inputs of the n-to-1 multiplexer is connected to the output of the n-to-1 multiplexer than no power is provided to a battery-operated device to be powered by the present invention.
In the preferred embodiment, n batteries may be used.
In an alternate embodiment, the n-to-1 multiplexer always connects one of its inputs to its output.
In this embodiment, one of multiplexer inputs is either connected to a ground potential or left open when no power is to be provided to the desired battery-operated device.
In this embodiment, only n-1 batteries may be used.
The description that follows is in terms of the preferred embodiment.
A battery is connected to each input of the n-to-1 multiplexer.
A sensor is connected to the output of the n-to-1 multiplexer to sense at least voltage.
The sensor may also sense current and temperature

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