Cell system

A cell system, comprising:

• a stacked-type cell module including a plurality of lithium ion unit cells being stacked, the lithium ion unit cells each including:
• a positive electrode that includes a positive electrode current collector containing a resin current collector layer and a positive electrode active material layer containing a positive electrode active material formed on the positive electrode current collector;
• a negative electrode that includes a negative electrode current collector containing a resin current collector layer and a negative electrode active material layer containing a negative electrode active material formed on the negative electrode current collector;
• and
• a separator arranged between the positive electrode active material layer and the negative electrode material layer, each lithium ion unit cell of the plurality of lithium ion unit cells having a unit cell through hole penetrating in a stacking direction formed therein, the stacked-type cell module having a through hole formed in the stacking direction by overlapping the unit cell through holes;
• a continuous insulating film of a same member that integrally covers a surface of the stacked-type cell module and an inner peripheral surface of the through hole;
• a gas supply part that supplies a first gas to the through hole;
• a cooling liquid supply part that supplies a cooling liquid to the through hole;
• a temperature sensor that detects a temperature of the stacked-type cell module;
• and
• a control part that controls switching between a normal control mode and a high-temperature control mode based on a detection signal output from the temperature sensor, wherein
• in the normal control mode, the control part controls the gas supply part to supply the first gas to the through hole and at the same time, controls the cooling liquid supply part to stop supply of the cooling liquid, and
• in the high-temperature control mode, the control part controls the cooling liquid supply part to supply the cooling liquid to the through hole to which the first gas is supplied, and at the same time, controls the gas supply part to stop supply of the first gas.