Cell-balancing method and battery management system performing the same
AssigneeSamsung SDI Co., Ltd.
InventorsTakao Hidaka, Hwa-Su Kim
Life of this patent
Estimating the term…
Abstract
A battery management system may include a plurality of balancing resistors respectively forming balancing discharging paths of cells connected in series to each other, a plurality of balancing switches respectively connected between the cells and the balancing resistors, and configured to control cell-balancing of each of the cells, a voltage-detecting circuit for detecting respective cell voltages of the cells, and a battery controller for acquiring respective balancing capacities of the cells based on the cell voltages, for obtaining duty cycles of the balancing switches according to the balancing capacities, and for scaling the duty cycles of the balancing switches according to a sum of duty cycles of two adjacent cells from among the cells.
Claims12
A battery management system comprising:
- a plurality of balancing resistors respectively forming balancing discharging paths of cells connected in series to each other;
- a plurality of balancing switches respectively connected between the cells and the balancing resistors, and configured to control cell-balancing of each of the cells;
- a voltage-detecting circuit for detecting respective cell voltages of the cells;
- and
- a battery controller for acquiring respective balancing capacities of the cells based on the cell voltages, for obtaining duty cycles of the balancing switches according to the balancing capacities, and for scaling the duty cycles of the balancing switches according to a sum of duty cycles of two adjacent cells from among the cells.
A battery management system comprising:
- a plurality of balancing resistors respectively forming balancing discharging paths of cells connected in series to each other;
- a plurality of balancing switches respectively connected between the cells and the balancing resistors for controlling a cell-balancing of each of the cells;
- a voltage-detecting circuit for detecting cell voltages of the cells;
- a battery controller for acquiring balancing capacities of the cells based on the cell voltage, and for obtaining duty cycles of the balancing switches according to the balancing capacities;
- and
- a battery integrated circuit for controlling operation of the balancing switches by using a balancing task, which is repeatedly executed during an execution cycle that is shorter than a balancing cycle, and which corresponds to the duty cycles, to allow a turn-on state of the balancing switches only during a part of an execution period of the balancing task.
Dependencies are inferred from the claim text.