CONTROL SIGNAL GENERATION CIRCUIT AND BATTERY MANAGEMENT SYSTEM USING THE SAME
First Claim
1. A battery management system coupled to a battery formed with a pack having a plurality of battery cells including first and second battery cells, the battery management system comprising:
- a control signal generator outputting a first control signal, and second, third, and fourth control signals having a first level at different timing from the first control signal;
first and second relays respectively transmitting cell voltages of the first and second battery cells by being turned on in response to the first level of the first and second control signals;
a third relay transmitting the cell voltage transmitted through one of the first and second relays in response to the third control signal with the first level;
a charging unit storing the cell voltage transmitted from the third relay;
a fourth relay transmitting the stored cell voltage of the charging unit in response to the first level of the fourth control signal; and
an A/D converter converting the cell voltage transmitted through the fourth relay into digital data,wherein the control signal generator makes the first and second control signals to be a second level excluding the first level when the fourth control signal is the first level and makes the third control signal to be the second level.
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Abstract
A control signal generating circuit used in a battery management system may stably generate a control signal. The control signal generating circuit includes a first signal line transmitting a first control signal having an on-level or an off-level, a second signal line transmitting a second control signal having an on-level or an off-level, and a third signal line transmitting a third control signal having an on-level or an off-level. In addition, the control signal generating circuit includes a transistor including a first electrode coupled to the first signal line and a second electrode applied with the off-level. The transistor electrically connects the first and second electrodes and converts the first control signal into a fourth control signal by being turned on based on the second and third control signals. Finally, the control signal generating circuit includes a circuit unit generating a fifth control signal having the on-level when the second and third control signals are input and have the off-level.
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Citations
5 Claims
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1. A battery management system coupled to a battery formed with a pack having a plurality of battery cells including first and second battery cells, the battery management system comprising:
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a control signal generator outputting a first control signal, and second, third, and fourth control signals having a first level at different timing from the first control signal; first and second relays respectively transmitting cell voltages of the first and second battery cells by being turned on in response to the first level of the first and second control signals; a third relay transmitting the cell voltage transmitted through one of the first and second relays in response to the third control signal with the first level; a charging unit storing the cell voltage transmitted from the third relay; a fourth relay transmitting the stored cell voltage of the charging unit in response to the first level of the fourth control signal; and an A/D converter converting the cell voltage transmitted through the fourth relay into digital data, wherein the control signal generator makes the first and second control signals to be a second level excluding the first level when the fourth control signal is the first level and makes the third control signal to be the second level. - View Dependent Claims (2, 3, 4)
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5. A battery management system including a plurality of battery cells, the system comprising:
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a main control unit controlling the operation of the battery cells; a control signal generator connected to the main control unit and transmitting a plurality of control signals; a cell voltage measurer measuring analog voltages of the battery cells based on the control signals transmitted from the control signal generator and outputting analog voltage values of the battery cells; and an analog/digital converter converting the analog voltage values received from the cell voltage measurer into digital data and outputting the digital data to the main control unit, wherein the main control unit prevents a simultaneous transmission of stored cell voltages of the battery cells to the analog/digital converter based on the digital data received from the analog/digital converter.
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Specification