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Analog Circuit Design by Jim Williams, Bob Dobkin

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19

Developments in battery stack voltage measurementA simple solution to a not so simple problem

Jim Williams and Mark Thoren

Automobiles, aircraft, marine vehicles, uninterruptible power supplies and telecom hardware represent areas utilizing series connected battery stacks. These stacks of individual cells may contain many units, reaching potentials of hundreds of volts. In such systems it is often desirable to accurately determine each individual cell’s voltage. Obtaining this information in the presence of the high “common mode” voltage generated by the battery stack is more difficult than might be supposed.

The battery stack problem

The “battery stack problem” has been around for a long time. Its deceptively simple appearance masks a stubbornly ...

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