Brooks Kushman P.C.
Detection of imbalance across multiple battery cells measured by the same voltage sensor
A vehicle having a battery pack with cells arranged in at least groups of two cells in series is disclosed. A controller balances the cells based on a change in voltage across the cells being different than an expected change in voltage. The expected value is based on a current and a time associated with charging or discharging the cells. A controller is disclosed that commands charging and discharging of the battery cells based on a difference between a voltage across the group and the expected value for the group. A method for charging and discharging a battery pack is disclosed. The voltage across a group of cells is measured and compared to an expected value. An imbalance in a cell attribute is estimated according to a difference between the measured voltage and the expected voltage. The voltage across each battery cell is not required.
Ford Global Technologies, LLC
H H B B Y B B H B
H02J H02J B60L B60L Y02T B60L B60L H02J B60L
inventional inventional additional additional additional inventional additional inventional inventional
Anna Yonghua Richard Dyche Xinfan
Stefanopoulou Li Anderson Lin