BATTERY MANAGEMENT SYSTEM AND DRIVING METHOD THEREOF
First Claim
1. A battery management system comprising:
- a sensing unit for measuring a cell voltage and a cell current of each of a plurality of battery cells; and
a main control unit (MCU) for measuring a state of charge (SOC) of each of the battery cells to control charge and discharge by utilizing the cell voltage and the cell current of each of the battery cells,wherein the MCU comprises;
an SOC measurement unit for measuring a first SOC of each of the battery cells in a key-off state, and measuring a second SOC of each of the battery cells in a key-on state after the key-off state; and
a controller for comparing whether a first difference value between the first SOC and the second SOC of each of the battery cells is greater than a first reference value or comparing whether a second difference value between a maximum value among the second SOC of each of the battery cells and the second SOC of each of the battery cells is greater than a second reference value to determine a short battery cell in which the first difference value is greater than the first reference value or the second difference value is greater than the second reference value from among the battery cells.
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Abstract
A battery management system and a driving method thereof are disclosed, which may detect a short battery cell capable of causing short among a plurality of battery cells during a parking period of a vehicle. The battery management system includes a sensing unit for measuring a cell voltage and a cell current of each of a plurality of battery cells and an MCU for measuring an SOC of each of the battery cells to control charge and discharge by utilizing the cell voltage and the cell current of each of the battery cells. The MCU measures a first SOC of each of the battery cells in a key-off state and a second SOC of each of the battery cells in a key-on state after the key-off state. The MCU utilizes the first SOC, the second SOC, and a time period between the first and second SOCs to determine a short battery cell among the plurality of battery cells.
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Citations
17 Claims
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1. A battery management system comprising:
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a sensing unit for measuring a cell voltage and a cell current of each of a plurality of battery cells; and a main control unit (MCU) for measuring a state of charge (SOC) of each of the battery cells to control charge and discharge by utilizing the cell voltage and the cell current of each of the battery cells, wherein the MCU comprises; an SOC measurement unit for measuring a first SOC of each of the battery cells in a key-off state, and measuring a second SOC of each of the battery cells in a key-on state after the key-off state; and a controller for comparing whether a first difference value between the first SOC and the second SOC of each of the battery cells is greater than a first reference value or comparing whether a second difference value between a maximum value among the second SOC of each of the battery cells and the second SOC of each of the battery cells is greater than a second reference value to determine a short battery cell in which the first difference value is greater than the first reference value or the second difference value is greater than the second reference value from among the battery cells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A driving method of a battery management system, the driving method comprising:
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measuring a first State Of Charge (SOC) of each of a plurality of battery cells in a key-off state, and measuring a second SOC of each of the battery cells in a key-on state after the key-off state; comparing whether a first difference value between the first SOC and the second SOC of each of the battery cells is greater than a first reference value, or comparing whether a second difference value between a maximum value among the second SOC of each of the battery cells and the second SOC of each of the battery cells is greater than a second reference value; and determining a short battery cell in which the first difference value is greater than the first reference value or the second difference value is greater than the second reference value from among the battery cells. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification