Lg Chem, Ltd

Hyun-Ju Hong

Jin-Su Jang

Chang-Eon Jin

Disclosed is an apparatus for measuring an insulation resistance that may calculate each of a cathode terminal-side insulation resistance value and an anode terminal-side insulation resistance value of a battery. The apparatus for measuring an insulation resistance according to the present disclosure forms different first and second circuits by selectively connecting an insulation resistance measurement unit to a cathode terminal or an anode terminal of the battery, and calculates a cathode terminal-side insulation resistance value and an anode terminal-side insulation resistance value from first and second insulation detection voltages applied to the insulation resistance measurement unit and simultaneous circuit equations derived from the first and the second circuits. Accordingly, quantitative insulation resistance values of the cathode terminal and the anode terminal of the battery may be each obtained.

Apparatus and method for measuring insulation resistance of battery

Disclosed is an isolation resistance measuring apparatus having a fault self-diagnosing function and a fault self-diagnosing method using the same. The isolation resistance measuring apparatus having a fault self-diagnosing function detects whether a fault arises at the isolation resistance measuring apparatus by using first and second isolation detection voltages detected in a state where a diagnosing unit is not connected (an isolation resistance measuring mode) and first and second diagnosis detection voltages detected in a state where the diagnosing unit is connected (a fault self-diagnosing mode). By doing so, it is possible to self-diagnose a fault by using an original function of the isolation resistance measuring apparatus which may measure an isolation resistance.

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Daejeon, South Korea

Hyun-Ju Hong