Insulation Resistance Measuring Circuit Free from Influence of Battery Voltage
First Claim
1. An insulation resistance measuring circuit comprising:
- a source resistor unit including a first source resistor connected between a positive terminal of a battery and a second source resistor and the second source resistor connected between a negative terminal of the battery and the first source resistor;
a voltage sensing unit sensing a voltage of the first source resistor as a first voltage and sensing a voltage of the second source resistor as a second voltage; and
an insulation resistance measuring unit measuring an insulation resistance of the battery through a value obtained by dividing a difference between the first and second voltages by a sum between the first and second voltages.
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Accused Products
Abstract
Provided is an insulation resistance measuring circuit including: a source resistor unit including a first source resistor connected between a positive terminal of a battery and a second source resistor and the second source resistor connected between a negative terminal of the battery and the first source resistor; a voltage sensing unit sensing a voltage of the first source resistor as a first voltage and sensing a voltage of the second source resistor as a second voltage; and an insulation resistance measuring unit measuring an insulation resistance of the battery through a value obtained by dividing a difference between the first and second voltages by a sum between the first and second voltages.
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Citations
16 Claims
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1. An insulation resistance measuring circuit comprising:
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a source resistor unit including a first source resistor connected between a positive terminal of a battery and a second source resistor and the second source resistor connected between a negative terminal of the battery and the first source resistor; a voltage sensing unit sensing a voltage of the first source resistor as a first voltage and sensing a voltage of the second source resistor as a second voltage; and an insulation resistance measuring unit measuring an insulation resistance of the battery through a value obtained by dividing a difference between the first and second voltages by a sum between the first and second voltages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 15)
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9. An insulation resistance measuring circuit comprising:
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a source resistor unit including a first source resistor connected between a positive terminal of a battery and a second source resistor and the second source resistor connected between a negative terminal of the battery and the first source resistor; a first operational amplifier (OP Amp) connected to the first source resistor through a non-inverting terminal and an inverting terminal thereof, sensing a first source voltage applied to the first source resistor as the first voltage, and outputting the sensed first source voltage through an output terminal thereof; a second OP Amp connected to the second source resistor through a non-inverting terminal and an inverting terminal thereof, sensing a second source voltage applied to the second source resistor as the second voltage, and outputting the sensed second source voltage through an output terminal thereof; an analog to digital converter connected to each of output terminals of the first and second OP Amps, converting each of the first and second voltages into digital signals, and outputting first and second voltage signals; and a microcontroller measuring an insulation resistance of the battery through a value obtained by dividing a difference between the first voltage of the first voltage signal and the second voltage of the second voltage signal by a sum between the first voltage of the first voltage signal and the second voltage of the second voltage signal. - View Dependent Claims (10, 11, 12, 13, 14, 16)
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Specification