Battery management system and driving method thereof
First Claim
1. A battery management system for a plurality of cells, and a plurality of cell relays respectively coupled to the plurality of cells, comprising:
- an auxiliary power unit;
a voltage detecting unit comprising a 3-contact relay, to transmit an input voltage from at least one cell relay of the plurality of cell relays when at least one of the plurality of cell relays is turned on and transmitting an input voltage from the auxiliary power unit on key-on and parking, to store a first voltage corresponding to the input voltage transmitted through the 3-contact relay, and to generate a second voltage corresponding to the first voltage; and
an MCU to calculate an effective gain in correspondence with a ratio of the second voltage to the input voltage, and to control the 3-contact relay.
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Accused Products
Abstract
A battery management system and a driving method thereof. The battery management system manages a plurality of battery cells, and a plurality of cell relays respectively coupled to the plurality of cells. The battery management system includes a voltage detecting unit and an MCU. The voltage detecting unit receives a first voltage corresponding to an input voltage transmitted through a 3-contact relay coupled to a first cell corresponding to the turn-on first cell relay when the first cell relay is turned on, and generating a second voltage corresponding to the first voltage. The MCU calculates an effective gain in correspondence with a ratio of the second voltage to the input voltage and controls a connection of the 3-contact relay.
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Citations
16 Claims
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1. A battery management system for a plurality of cells, and a plurality of cell relays respectively coupled to the plurality of cells, comprising:
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an auxiliary power unit; a voltage detecting unit comprising a 3-contact relay, to transmit an input voltage from at least one cell relay of the plurality of cell relays when at least one of the plurality of cell relays is turned on and transmitting an input voltage from the auxiliary power unit on key-on and parking, to store a first voltage corresponding to the input voltage transmitted through the 3-contact relay, and to generate a second voltage corresponding to the first voltage; and an MCU to calculate an effective gain in correspondence with a ratio of the second voltage to the input voltage, and to control the 3-contact relay. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A battery management system for a plurality of cells, a plurality of cell relays respectively coupled to the plurality of cells, the battery management system comprising:
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an auxiliary power unit; a 3-contact relay to transmit an input voltage from at least one cell relay, of the plurality of cell relays, when the at least one cell relay is turned on, and to transmit an input voltage from the auxiliary power unit on key-on and parking; a capacitor to store a first voltage corresponding to the input voltage transmitted through the 3-contact relay; a differential amplification terminal to receive the first voltage stored at the capacitor, and to amplify the first voltage according to a gain and thereby generate a second voltage; and a control relay to selectively connect the capacitor and the differential amplification terminal. - View Dependent Claims (9)
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10. A battery management system for a plurality of cells, the battery management system comprising:
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an auxiliary power unit; a 3-contact relay to transmit an input voltage from at least one cell relay, when the at least one cell relay is turned on and to transmit an input voltage from the auxiliary power unit at key-on and parking; a capacitor to store a first voltage corresponding to the input voltage transmitted through the 3-contact relay; a voltage following unit to receive the first voltage and transmit a second voltage being the same as the first voltage; and a control relay to selectively connect the capacitor with the voltage following unit when the first voltage is transmitted to the voltage following unit. - View Dependent Claims (11)
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12. A method for a battery management system comprising a plurality of cells, an auxiliary power unit, and a 3-contact relay coupled to the auxiliary power unit on key-on and parking, and a voltage detecting unit is to generate an output voltage using a reference voltage transmitted through the 3-contact relay, the method comprising:
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transmitting the reference voltage to the voltage detecting unit on one of key-on and parking; generating an output voltage corresponding to the reference voltage; calculating an effective gain in correspondence with a ratio of the output voltage to the reference voltage; and comparing the effective gain to a previous effective gain calculated on one of a previous key-on and a previous parking. - View Dependent Claims (13, 14, 15, 16)
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Specification