Air conditioning system and method for high-voltage battery of vehicle

Abstract

An air conditioning system of a high voltage battery for a vehicle and an air conditioning method using the same include a first heat exchanger arranged in a housing of the high-voltage battery and a first blower for blowing air around the first heat exchanger. A second heat exchanger is arranged on an external upper part of the housing of the high-voltage battery, and a second blower blows air around the second heat exchanger. A first surface of a Peltier cooler is in contact with the second heat exchanger. Cooling water circulates through a cooling line, and a first part of which is in contact with a second surface of the Peltier cooler extending downward, and a second part of the cooling line is connected to the first heat exchanger to exchange heat.

What is claimed is: 
     
         1 . An air conditioning system of a high voltage battery for a vehicle, the system comprising:
 a first heat exchanger arranged in a housing of the high-voltage battery and a first blower for blowing air around the first heat exchanger;   a second heat exchanger arranged on an external upper part of the housing of the high-voltage battery and a second blower for blowing air around the second heat exchanger;   a Peltier cooler a first surface of which is connected and in contact with the second heat exchanger; and   a cooling line through which cooling water circulates, the cooling line having a first part of which is connected and in contact with a second surface of the Peltier cooler extending downward, and a second part of which is connected to the first heat exchanger to exchange heat.   
     
     
         2 . The air conditioning system of  claim 1 , wherein the housing of the high-voltage battery is arranged in a trunk room and the first blower discharges waste heat to the inside of the trunk room, and an air extractor is provided in the trunk room. 
     
     
         3 . The air conditioning system of  claim 1 , wherein the housing of the high-voltage battery has a closed-structure and the first heat exchanger and the first blower are arranged inside the housing to air-condition internal air of the housing, and the second part of the cooling line is inserted through the housing to connect to the first heat exchanger. 
     
     
         4 . The air conditioning system of  claim 1 , wherein the cooling line is a cooling water pipe without having a separate driver. 
     
     
         5 . The air conditioning system of  claim 1 , wherein a plurality of radiation fins through which the heat is exchanged with the air are provided on the first heat exchanger and the second heat exchanger. 
     
     
         6 . The air conditioning system of  claim 1 , further comprising a controller for controlling operations of the first blower, the second blower, and the Peltier cooler. 
     
     
         7 . The air conditioning system of  claim 6 , wherein the controller operates the first blower and the second blower when a low level cooling of the high-voltage battery is required. 
     
     
         8 . The air conditioning system of  claim 6 , wherein the controller operates all of the first blower, the second blower, and the Peltier cooler when a high level cooling of the high-voltage battery is required. 
     
     
         9 . An air conditioning method of a high voltage battery for a vehicle using the air conditioning system of  claim 1 , the method comprising;
 a mode determining step for determining an air conditioning mode that is required for the high voltage battery; and   a high level cooling step for operating the first blower and the second blower in the case of a high level cooling mode, and controlling the Peltier cooler to be cooled on the first surface thereof.   
     
     
         10 . The air conditioning method of a high voltage battery for a vehicle of  claim 9 , further comprising a low level cooling step for operating only the first blower and the second blower in case of a low level cooling mode, after the mode determining step.