Battery fire suppression system with fire extinguishing agent cooling function

A battery fire suppression system with a fire extinguishing agent cooling function, the system comprising:

• a heat exchanger having, on a first side thereof, a first heat exchange inlet and a second heat exchange inlet and, on a second side thereof, a first heat exchange outlet and a second heat exchange outlet, the heat exchanger being provided with a cooling part therein that connects the second heat exchange inlet and the second heat exchange outlet to each other;
• an agent feeder configured to supply a fire extinguishing agent to the first heat exchange inlet;
• a gas feeder configured to supply a fire extinguishing gas to the second heat exchange inlet;
• a first fire detection sensor configured to be placed inside a battery module;
• a second fire detection sensor configured to be placed in a battery room in which the battery module is loaded;
• a control valve fluidly connected to the second heat exchange inlet and a connection member, and configured to selectively supply the fire extinguishing gas received from the gas feeder to the second heat exchange inlet or the connection member;
• and
• a controller configured to control the control valve to supply the fire extinguishing gas received from the gas feeder to the second heat exchange inlet when receiving a detection signal from the first fire detection sensor, and control the control valve to supply the fire extinguishing gas received from the gas feeder to the connection member when receiving a detection signal from the second fire detection sensor,
• wherein the connection member comprises
• a first connection part having a first side connected to the first heat exchange outlet and a second side,
• a second connection part having a first side connected to the second heat exchange outlet and a second side, and
• a third connection part having a first side connected to the control valve and a second side configured to be positioned at a side of the battery room,
• wherein the connection member further comprises
• a first nozzle configured to be positioned to face an inside of the battery module,
• a second nozzle configured to be positioned to face a surface of the battery module,
• a third nozzle configured to be mounted on the side of the battery room,
• the second side of the first connection part is connected to the first nozzle,
• the second side of the second connection part is connected to the second nozzle, and
• the second side of the third connection part is connected to the third nozzle,
• wherein the fire extinguishing gas flowing into the cooling part through the second heat exchange inlet serves as a refrigerant for cooling the cooling part and then is discharged through the second heat exchange outlet, and
• the fire extinguishing agent flowing into the heat exchanger through the first heat exchange inlet is discharged through the first heat exchange outlet in a state of being subjected to heat exchange with the cooling part.