Battery management system to manage a battery having a plurality of cells and driving method thereof
First Claim
1. A battery management system to manage a battery having a plurality of cells, comprising:
- a sensing unit to measure a cell voltage of each cell of the plurality of cells;
a micro control unit (MCU) to detect cells that require cell balancing of the plurality of measured cell voltages, and to generate a plurality of cell voltage signals to control the cell balancing of the detected cells; and
a cell balancing unit to perform cell balancing operations to balance the detected cells according to the plurality of cell voltage signals,wherein a number of the plurality of cell voltage signals is fewer than a number of the plurality of cells, the cell balancing unit generates a plurality of cell balancing signals corresponding to the plurality of cell voltage signals, and at least one of the plurality of cell voltage signals balances at least two cells of the plurality of cells.
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Accused Products
Abstract
A battery management system and a driving method thereof to manage a battery including a plurality of cells. The battery management system includes a sensing unit, an MCU, and a cell balancing unit. The sensing unit measures cell voltages of the plurality of cells. The MCU detects cells requiring cell balancing according to the plurality of measured cell voltages and generates a plurality of cell voltage signals to control the cell balancing of the detected cells. The cell balancing unit balances the cells according to the plurality of cell voltage signals, and the number of the cell voltage signals is fewer than the number of cells. The cell balancing unit generates a plurality of cell balancing signals corresponding to each of the plurality of cell voltage signals, and at least one of the cell voltage signals balances at least two of cells in the battery.
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Citations
22 Claims
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1. A battery management system to manage a battery having a plurality of cells, comprising:
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a sensing unit to measure a cell voltage of each cell of the plurality of cells; a micro control unit (MCU) to detect cells that require cell balancing of the plurality of measured cell voltages, and to generate a plurality of cell voltage signals to control the cell balancing of the detected cells; and a cell balancing unit to perform cell balancing operations to balance the detected cells according to the plurality of cell voltage signals, wherein a number of the plurality of cell voltage signals is fewer than a number of the plurality of cells, the cell balancing unit generates a plurality of cell balancing signals corresponding to the plurality of cell voltage signals, and at least one of the plurality of cell voltage signals balances at least two cells of the plurality of cells. - View Dependent Claims (2, 3, 4, 5, 6, 17, 18, 19, 20, 21)
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7. A battery management system for managing a plurality of cells, comprising:
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a MCU (micro control unit) to generate a plurality of cell voltage signals, a plurality of controller selection signals, and at least one cell balancing activation signal to control a cell balancing operation to balance voltages of cells among the plurality of cells, and to transmit the generated cell voltage signals and control signals to a plurality of output ports; a first cell balancing controller connected to the MCU to receive a first plurality of the cell voltage signals according to one of the plurality of controller selection signals, and to generate a first plurality of cell balancing signals according to the first plurality of cell voltage signals; a second cell balancing controller connected to the MCU to receive a second plurality of the cell voltage signals according to another of the plurality of controller selection signals, and to generate a second plurality of cell balancing signals according to the second plurality of cell voltage signals; and a cell balancing driver connected to the first cell balancing controller and the second cell balancing controller to receive the first and second pluralities of cell balancing signals, and to balance the voltages of the cells corresponding to the cell balancing signal, wherein one of the first plurality of cell voltage signals and one of the second plurality of cell voltage signals are transmittable through one of the plurality of output ports of the MCU. - View Dependent Claims (8, 9, 10, 11, 12, 22)
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13. A driving method of a battery management system for a battery comprising a plurality of cells comprising a first group of cells comprising at least two cells and a second group of cells comprising at least two cells, comprising:
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detecting cells that require cell balancing from the first group and the second group of the plurality of cells; determining whether a first cell that requires cell balancing from the first group shares an output port of a control unit with a second cell that requires cell balancing from the second group; generating one cell voltage signal to control the cell balancing of the first cell and the second cell if the first cell shares the output port with the second cell; generating a first cell voltage signal for the first cell and a second cell voltage signal for the second cell if the first cell does not share the output port with the second cell; and balancing the first cell and the second cell according to the cell voltage signals. - View Dependent Claims (14, 15, 16)
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Specification