摘要:
An apparatus for balancing charge capacity of battery cell includes a voltage sensing/discharging circuit having a battery with cell group, a switching unit for selectively connecting both terminals of each battery cell to conductive lines, capacitor connected to the conductive lines, a voltage amplifying unit connected to both terminals of capacitor via a first switch, and a discharge resistance connected to both terminals of capacitor via a second switch; and a voltage balancing unit for controlling the switching unit in ON state of first switch to connect both terminals of each battery cell to the conductive lines and then sense voltage of each battery cell through the voltage amplifying unit, and controlling the switching unit in OFF state of first switch to charge voltage of balancing-requiring cell to the capacitor and then turning on the second switch to discharge charged voltage of capacitor through the discharge resistance.
摘要:
Disclosed are a method and an apparatus for detecting abnormality of a current sensor operative to measure a charge or discharge current of a battery pack. The method comprises measuring current and voltage of the battery pack; and detecting abnormality of the current sensor by comparing variations in current and voltage over a predetermined time with a current reference value and a voltage reference value, respectively.According to the present invention, it is capable of improving reliability of the battery pack, and in case that the current sensor is out of order, of protecting the battery pack from dangerous accidents such as explosion.
摘要:
Disclosed are shutter glasses for viewing a stereoscopic image including: a left-eye shutter; a right-eye shutter; and a controller which generates an error signal indicating an error if at least one of a first and a second error condition exists, wherein the first error condition is internal to the shutter glasses, and the second error condition is external to the shutter glasses.
摘要:
An apparatus for estimating an OCV of a battery includes a voltage sensing unit for measuring a battery output voltage; a temperature sensing unit for measuring a battery temperature; a data storing unit for periodically receiving the battery output voltage and temperature data from the sensing units and storing the data in a memory; an OCV variation estimating unit for calculating an OCV variation from a varying pattern of battery output voltages measured in the past and at the present, stored in the memory, by applying a mathematical model defining a correlation between the varying pattern and the OCV variation, and estimating an OCV at a current stage by reflecting a correction factor corresponding to the battery temperature on the calculated OCV variation; and an OCV estimating unit for estimating an OCV at the current stage by reflecting the estimated OCV variation on the OCV estimated at a last stage.
摘要:
In a liquid crystal display (LCD) panel driver with a self-masking function using a power-on reset signal, and in a method of driving the same, the LCD panel driver includes a power-on reset signal generation unit that generates a power-on reset signal in response to a supply voltage applied to a LCD panel; a latch unit that receives a start pulse signal instructing that source lines of the LCD panel be driven and generates first and second set signals for setting an initial value of an output signal of a flip-flop to be in a predetermined default logic level, in response to the power-on reset signal; and a counter unit that generates a start pulse masking signal by masking at least one pulse of the start pulse signal in response to the first and second set signals and the start pulse signal.
摘要:
Disclosed is a method of estimating a maximum output of a battery for a hybrid electric vehicle (HEV). The method comprises extracting maximum charge/discharge outputs of the battery depending on a plurality of charged states (SOC) of the battery under which the vehicle is able to be driven and calculating an interrelation between them; extracting maximum charge/discharge outputs of the battery at plural temperatures under which the vehicle is able to be driven, and calculating an interrelation between them; extracting degradations of outputs of the battery as a capacity of the battery is discharged during the traveling, and calculating an interrelation between them; and based on the interrelations obtained, estimating a maximum output of the battery using a function.
摘要:
An integrated circuit device includes a differential amplifier, an output driver and a control circuit. The differential amplifier is responsive to a pair of differential input signals and may include a pull-down current source responsive to a pair of bias signals. The output driver has a pull-up path and pull-down path therein. These paths are joined together at an output node. The output driver has a first input terminal electrically coupled to a first output terminal of the differential amplifier. The control circuit is electrically coupled to the differential amplifier and a second input terminal of the output driver. The control circuit is configured to dispose the pull-down path in a nonconductive state when the output node is being switched low-to-high.
摘要:
An output buffer with an improved slew rate and method thereof. The output buffer may include a differential amplifier, a controller and an output unit. The output buffer may generate a pull signal and a control signal based on received input and output signals. The controller may transition an output node to a control voltage in response to the control signal and a bias voltage. The output unit may maintain the first output signal between a given voltage and the control voltage based on the pull signal and the bias voltage.
摘要:
An operational amplifier includes: a differential amplifier for differentially amplifying first and second differential input signals to generate first and second output signals through first and second nodes; a driver for driving an output node in response to the second output signal; and a drive current adjuster for adjusting a driving current of the driver in response to the first output signal. The drive current adjuster includes: a first transistor including a drain connected to the output node, a gate, and a source connected to a ground voltage; a second transistor including a gate connected to the first node, a drain, and a source connected to a source voltage; a third transistor including a drain connected to the drain of the second transistor, a source, and a gate connected to a first bias voltage; and a fourth transistor including a drain connected to the source of the third transistor, a source connected to the ground voltage, and a gate connected to a second bias voltage, wherein the gate of the first transistor is commonly connected to the drains of the second and third transistors.
摘要:
An operational amplifier includes: a differential amplifier for differentially amplifying first and second differential input signals to generate first and second output signals through first and second nodes; a driver for driving an output node in response to the second output signal; and a drive current adjuster for adjusting a driving current of the driver in response to the first output signal. The drive current adjuster includes: a first transistor including a drain connected to the output node, a gate, and a source connected to a ground voltage; a second transistor including a gate connected to the first node, a drain, and a source connected to a source voltage; a third transistor including a drain connected to the drain of the second transistor, a source, and a gate connected to a first bias voltage; and a fourth transistor including a drain connected to the source of the third transistor, a source connected to the ground voltage, and a gate connected to a second bias voltage, wherein the gate of the first transistor is commonly connected to the drains of the second and third transistors.