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Question about charge battey measurement

Discussion in 'Electronic Design' started by [email protected], May 9, 2009.

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  1. Guest

    I shound measure charge battery with a microcontroller, but i have no
    idea how can i do it...any link,book, data-sheet, suggestion?
  2. Sylvia Else

    Sylvia Else Guest

    What kind of battery?

  3. Eeyore

    Eeyore Guest

    Do you mean 'state of charge' or to control the charge rate for example
    ? Your question makes no sense as it stands.

    If you don't already know how to use a microcontroller you've a big task
    ahead of you.

  4. Nico Coesel

    Nico Coesel Guest

    Read the datasheet that comes with the battery. As a general rule of
    thumb: the faster you want to charge, the more difficult it will be.
    The problem is that you can't really measure the amount of energy left
    in a battery. The voltage across a battery will vary because of the
    charge, temperature, current and probably the direction of the wind.
  5. You can to a reasonable degree of accuracy if you use one of the many "fuel
    gauge" battery charge logging chips available.

  6. John Nagle

    John Nagle Guest

    Yes. Measuring state of charge, and battery charging, varies
    hugely with the type of battery. It's complicated, and tied to
    battery chemistry. Unloaded voltage isn't very helpful.
    What are you trying to do?

    John Nagle
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