Battery voltage monitoring apparatus

A battery voltage monitoring apparatus monitoring an assembled battery voltage, the assembled battery including a plurality of battery cells, comprising;

• a voltage sensor detecting potential of the plurality of battery cells;
• an output logic circuit outputting a potential detect signal based on an output of the voltage sensor, the potential detect signal representing that abnormal potential is detected;
• and
• a delay circuit adding certain delay to the output of the voltage sensor and outputting the delayed voltage detect signal to the output logic circuit;
• wherein
• the voltage sensor comprises a comparator operating with output potential of battery cell as potential source, the battery cell being an object to be monitored, and
• the comparator has hysteresis characteristic.

A battery voltage monitoring apparatus monitoring an assembled battery voltage, the assembled battery including a plurality of battery cells, comprising;

• a comparator detecting potential of the battery cell, and outputting a potential signal representing results of detection based on certain hysteresis characteristic;
• a delay circuit adding certain delay to the potential signal;
• and
• a logic circuit outputting a potential detect signal based on an output of the delay circuit.