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Measuring battery stack voltage

Posted: 30 Jan 2009     Print Version  Bookmark and Share

Keywords:battery  cell  common mode 

High voltage operation is beyond the voltage breakdown capabilities of most practical semiconductor components, particularly if accurate measurement is required. The switches present similar problems. Attempts at implementing semiconductor-based switches encounter difficulty due to voltage breakdown and leakage limitations. What is really needed is a practical method that accurately extracts individual cell voltages while rejecting common mode voltages. This method cannot draw any battery current and should be simple and economically implemented.

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