VOLTAGE BALANCE CONTROL DEVICE
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United States of America Patent
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app pub date -
Aug 1, 2014
filing date -
Feb 15, 2012
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Abandoned
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Abstract
A voltage balance control device (100) selects a reference capacity battery cell on the basis of battery capacity and calculates a balance target voltage value according to the capacity difference between the reference capacity battery cell and each battery cell. The balance target voltage value is calculated such that the remaining charge capacity at a charging end time of an assembled battery and the remaining discharge capacity at a discharging end time thereof either should substantially match each other or should be at a predetermined ratio. Even if the voltage characteristic of each battery cell changes after performing voltage balancing, this makes it possible to set the minimum capacity battery cell as a charging and discharging end voltage limiting cell and fully use the capacity of the minimum capacity battery cell to bring out the maximum battery performance of the assembled battery.
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