By ISO120 and INA105 instrumentation amplifier as shown, multiplexer constituted 600V battery system battery monitoring circuit. This circuit 50 in series 12V battery (ie, the
total voltage 600V) charging and discharging detection to prevent overcharging or over-discharging. ISO120 for a single input voltage across the battery terminal voltage 12V by two 10k resistor divider to obtain e/2 voltage, after the isolation amplifier to the INA105. INA105 inverting amplifier connected to a gain of 1, the output e/2 to the multiplexer, the multiplexer to select the output control.