Patent ID: 8435661

Claim:
A battery pack for an electric vehicle, in which an introduction direction of a cooling gas is identical to a discharging direction thereof, the battery pack comprising: a plurality of battery cells arranged as being connected in series; a first cooling channel coupled to one end of the battery cells to control a flow of a cooling gas such that a cooling gas introduced from the outside is discharged between the battery cells; a second cooling channel coupled to the other end of the battery cells to control a flow of the cooling gas such that the cooling gas passing between the battery cells is discharged to the outside; and a flux control plate located in the second cooling channel to uniformly keep a flux of the cooling gas passing between the battery cells, wherein the flux control plate includes: a blocking plate ( 172 ) extending from an upper surface of the second cooling channel toward a lower surface thereof and preventing the cooling gas passing between the battery cells from being directly discharged to the outside; and a flow guide plate ( 174 ) extending from one end of the blocking plate along a length direction of the second cooling channel, the flow guide plate guiding a flow of the cooling gas such that the cooling gas passing between the battery cells is moved in a direction opposite to the introduction direction of the cooling gas and then discharged to the outside, wherein the flow guide plate has a length (L 1 ) in a range from 70% to 95% of a distance (L 2 ) between battery cells located at the outermost positions, wherein the flow guide plate and the blocking plate have a width identical to a width of the second cooling channel, wherein a distance between the flow guide plate and the upper surface of the second cooling channel is identical to a distance between the flow guide plate and a lower surface of the second cooling channel, and wherein the flow guide plate is extended in parallel with a length direction of the second cooling channel.