REDUCED CENTRAL PROCESSING UNIT LOAD AND MEMORY USAGE BATTERY STATE OF CHARGE CALCULATION

摘要

A vehicle having a battery pack with cells grouped into subsets and at least one controller programmed to charge and discharge the battery pack is disclosed. A control output is generated based on a pack state of charge derived from each cell's initial state of charge at vehicle activation and an electric charge accumulated or spent by less than all of the cells of each of the subsets since vehicle activation. A method of estimating battery pack state of charge is disclosed in which a pack state of charge is calculated by identifying subsets of cells having similar properties and calculating an electric charge accumulated or spent for fewer than all of the cells of each subset. A cell state of charge is calculated for all cells based on an average electric charge accumulated or spent. The pack state of charge is based on all the cell states of charge.

主权项

1. A vehicle comprising:
a battery pack including cells grouped into a plurality of subsets; and at least one controller programmed to charge and discharge the battery pack according to a state of charge of the battery pack derived from an initial state of charge of each of the cells at vehicle activation and an electric charge accumulated or spent by each of less than all of the cells of each of the subsets since vehicle activation.