Fire extinguishing system for a battery of a vehicle

A fire extinguishing system for a battery of a vehicle, the system comprising:

• a gas discharge part installed in a battery pack of the vehicle and configured to discharge a gas from inside the battery pack;
• a gas passage part through which a gas can flow, the gas generated inside the battery pack when a fire occurs and discharged through the gas discharge part;
• a controller, which outputs a control signal for fire extinguishment when a fire occurs inside the battery pack;
• a vacuum pump installed in the gas passage part to operate according to the control signal outputted from the controller and configured to perform smothering extinguishment of fire that is inside the battery pack by sucking gas and air out of the battery pack during operation;
• and
• a closed space part provided in the vehicle so that the gas and air sucked by the vacuum pump can be moved and stored to the closed space part through the gas passage part,
• wherein the gas passage part includes a first passage part connected from the gas discharge part to a suction port of the vacuum pump, and a second passage part connected from a discharge hole of the vacuum pump to the closed space part,
• the system further comprising:
• a connection passage part which is branched from the second passage part and is connected to a discharge passage part for discharging gas to the outside of a vehicle;
• a first discharge valve, which is installed in the connection passage part and whose opening and closing operation is controlled by the controller, and
• a surrounding information input part that detects or provides information around a vehicle, wherein the controller
• determines whether a current vehicle location is a location where a gas generated inside the battery pack can be discharged to the outside of the vehicle based on the vehicle surrounding information inputted from the surrounding information input part, and
• opens the first discharge valve installed in the connection passage part so that the gas generated inside the battery pack is discharged to the outside of the vehicle, when determining that the gas can be discharged to the outside of the vehicle.