LOW VOLTAGE CHARGING AND BALANCING OF A HIGH VOLTAGE, SERIES-CONNECTED STRING OF BATTERY MODULES

摘要

Systems and methods for performing low voltage charging of a high voltage, series-connected string of battery modules are disclosed. A battery pack system may include a plurality of battery cells, including one or more groups of battery cells coupled in parallel. A processor may be configured to select a sub-group of battery cells from a group of battery cells for charging separately from other battery cells of the selected group of battery cells. The group of battery cells may be reconfigured to allow charging of the sub-group of battery cells separate from the other battery cells. The sub-group of battery cells may be charged, and then the group of battery cells may be reconfigured to allow operation of the sub-group of battery cells with the other battery cells. During charging, the sub-group of battery cells may be unavailable but other battery cells may continue to discharge.

主权项

1. A method, comprising:
selecting a sub-group of battery cells from a group of battery cells for charging separately from other battery cells of the group of battery cells; reconfiguring the group of battery cells to allow charging of the sub-group of battery cells separate from the other battery cells; charging the sub-group of battery cells; and reconfiguring the group of battery cells to allow operation of the sub-group of battery cells with the other battery cells.