Battery pack capacity learn algorithm

摘要

A method that considers battery capacity for providing cell balancing for battery cells in a battery pack. The method includes providing a current state-of-charge for each battery cell in the battery pack for a current time frame and a previous state-of-charge for each battery cell in the battery pack from a previous time frame. The method also includes subtracting the current state-of-charge from the previous state-of-charge for each battery cell to generate a cell delta state-of-charge for each cell and providing an average cell delta state-of-charge of the cell delta state-of-charges for all of the cells. The method also includes dividing each cell delta state-of-charge by the average cell delta state-of-charge to provide a relative cell delta state-of-charge for each cell and dividing the current state-of-charge by the relative cell delta state-of-charge for that cell to generate a capacity adjustment state-of-charge that identifies the capacity of the cell.

主权项

1. A method for determining a capacity of battery cells in a battery pack, said method comprising:
providing a current state-of-charge for each battery cell in the battery pack for a current time frame and a previous state-of-charge for each battery cell in the battery pack for a previous time frame; subtracting the current state-of-charge from the previous state-of-charge for each battery cell to generate a cell delta state-of-charge for each cell; providing an average cell delta state-of-charge for the cell delta state-of-charges from all of the cells; dividing each cell delta state-of-charge by the average cell delta state-of-charge to provide a relative cell delta state-of-charge for each cell; and dividing, using a microprocessor, the current state-of-charge for each cell by the relative cell delta state-of-charge for that cell to generate a capacity adjusted state-of-charge that identifies the capacity of the cell.