Open Cell Voltage
The voltage across positive and negative terminal of battery while not discharging current to a load
The internal resistance of the battery causes the OCV to decrease when current is discharged from it.
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Voltage Lookup
Accurate voltage measurements can be made while a cell is resting
The relation between capacity and voltage is non-linear. A typical model is shown below
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Involves counting the charges going into the battery by integrating the current
Requires knowledge of the initial amount of charges
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Defining Q as the total capacity of the battery in Ah/mAh leaves us with the following equation sets of equations
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