Storage battery system, method, and computer program product

A method to be executed by a storage battery system, the system comprising a cell module including storage battery cells;

• a battery management device that receives power supply from the cell module to operate;
• a contactor that is controlled by the battery management device and has a normally open contact inserted in a current supply path through which stored power is suppled from the cell module to an outside;
• and an interrupter that interrupts the power supply to the battery management device from the cell module, the method comprising:
• outputting a status signal for determining whether the cell module is likely to enter the over discharge state;
• determining output or no output of the status signal;
• and
• interrupting the power supply to the battery management unit from the cell module after determination of no output of the status signal.

A computer program including programmed instructions embodied in and stored on a non-transitory computer readable medium, wherein the instructions are to be executed by a computer to control a battery management system, the system comprising a cell module including storage battery cells;

• a battery management device that receives power supply from the cell module to operate;
• a contactor that is controlled by the battery management device and has a normally open contact inserted in a current supply path through which stored power is suppled from the cell module to an outside;
• and an interrupter that interrupts the power supply to the battery management device from the cell module, the instructions, when executed by the computer, causing the computer to perform:
• outputting a status signal for determining whether the cell module is likely to enter the over discharge state;
• determining output or no output of the status signal;
• and
• interrupting the power supply to the battery management unit from the cell module after determination of no output of the status signal.