Battery management system and battery management method

摘要

A battery management system (BMS) for managing discharging of a plurality of battery cells is disclosed. The battery management system comprises a battery monitoring unit, for monitoring statuses of the plurality of battery cells; and a discharge control unit, for controlling the plurality of battery cells to output a plurality of output powers to a load according to the statuses of the plurality of battery cells.

主权项

1. A battery management system (BMS) for managing discharging of a plurality of battery cells, comprising:
a battery monitoring unit, for monitoring statuses of the plurality of battery cells; a discharge control unit, for controlling the plurality of battery cells to output a plurality of output powers to a load according to the statuses of the plurality of battery cells; and a plurality of DC-to-DC convertors coupled to each of the plurality of battery cells, for modifying output voltage levels of the plurality of battery cells to generate the plurality of output powers; wherein each of the plurality of DC-to-DC convertors modifies corresponding one of the output voltage levels of corresponding one of the plurality of battery cells according to corresponding one of the statuses of the plurality of battery cells, to generate corresponding one of the plurality of output powers; wherein the discharge control unit controls a first DC-to-DC convertor corresponding to a first battery cell within the plurality of battery cells to control a first output voltage level of the first battery cell lower than a second output voltage level of a second battery cell when the battery monitoring unit indicates that a first status of the first battery cell is worse than a second status of the second battery cell, or the discharge control unit controls the first DC-to-DC convertor corresponding to the first battery cell within the plurality of battery cells to control the first output voltage level of the first battery cell higher than the second output voltage level of the second battery cell, when the battery monitoring unit indicates that the first status of the first battery cell is better than the second status of the second battery cell.