Liquid leakage detection system and stacked cell module

A liquid leakage detection system comprising:

• a stacked cell module including a plurality of cells stacked along a gravitational direction;
• a connector electrically connected to the cells;
• and
• a processor configured to determine whether liquid leakage occurs in the stacked cell module based on an electrical signal input from the connector, wherein
• each of the cells includes:
• a plate-shaped secondary battery;
• a sealing portion that contains the cell and seals an outer periphery of the cell;
• a voltage detection terminal including one end electrically connected to a cathode or an anode of the secondary battery and the other end exposed to an outside of the sealing portion;
• and
• a liquid leakage detection terminal electrically insulated from the secondary battery and the voltage detection terminal, positioned immediately below the voltage detection terminal, and fixed to the sealing portion,
• the connector includes liquid leakage detection terminal connection portions to which the liquid leakage detection terminals are electrically connected, and
• the processor is configured to determine whether liquid junction occurs between the voltage detection terminal and the liquid leakage detection terminal based on an electrical signal input from the liquid leakage detection terminal connection portion.