Battery management system and driving method thereof
First Claim
1. A battery management system for managing a battery having a plurality of cells for supplying power to a vehicle, the battery management system comprising:
- a sensing unit for measuring a voltage of each of the plurality of cells;
a first cell balancing driver for discharging at least one first cell of the plurality of cells when the vehicle is in a temporary stop state or a running state; and
a second cell balancing driver for transmitting the energy received from an over-charged cell to an over-discharged cell when the vehicle is in a stop state,wherein the battery management system detects at least one first cell among the plurality of cells needing to be balanced according to a measured voltage of each of the plurality of cells, and performs a cell balancing operation on said at least one first cell by using different methods according to operational states of the vehicle, the operational states of the vehicle comprising the temporary stop state, the running state, and the stop state.
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Accused Products
Abstract
A battery management system is provided for managing a battery that supplies power to a vehicle. The battery includes a plurality of cells. The battery management system includes a sensing unit for measuring a voltage of each of the plurality of cells. The battery management system detects at least one first cell among the plurality of cells that needs to be balanced according to the measured voltage of each of the plurality of cells. In addition, the battery management system performs a cell balancing operation on said at least one first cell by using different methods according to a driving state of the vehicle.
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Citations
19 Claims
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1. A battery management system for managing a battery having a plurality of cells for supplying power to a vehicle, the battery management system comprising:
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a sensing unit for measuring a voltage of each of the plurality of cells; a first cell balancing driver for discharging at least one first cell of the plurality of cells when the vehicle is in a temporary stop state or a running state; and a second cell balancing driver for transmitting the energy received from an over-charged cell to an over-discharged cell when the vehicle is in a stop state, wherein the battery management system detects at least one first cell among the plurality of cells needing to be balanced according to a measured voltage of each of the plurality of cells, and performs a cell balancing operation on said at least one first cell by using different methods according to operational states of the vehicle, the operational states of the vehicle comprising the temporary stop state, the running state, and the stop state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A driving method of a battery management system for managing a battery having a plurality of cells supplying power to a vehicle, the driving method comprising:
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a) determining a driving state of the vehicle; b) sensing a voltage for each of the plurality of cells; c) determining a cell needing to be balanced from among the plurality of cells; and d) performing a cell balancing operation on the cell by using different methods depending upon an operational state of the vehicle, the operational state being one of a plurality of states comprising a running state, a temporary stop state, and a stop state, wherein when the vehicle is in the stop state, determining the cell needing to be balanced comprises detecting an over-charged cell and an over-discharged cell from among the plurality of cells, and performing the cell balancing operation comprises performing the cell balancing operation on the over-charged cell and the over-discharged cell by transmitting energy from the over-charged cell to the over-discharged cell in the stop state only. - View Dependent Claims (19)
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Specification