Patent ID: 9660304
Date: 2017-05-23
CPC Classifications: B60K,B60L,H01M,Y02E,Y02T

Claim:
1. A battery pack comprising a plurality of battery modules, each having a unit cell that can be charged and discharged, mounted in a pack case, wherein each unit cell is a battery cell or a unit module, two or more unit cells constitute one battery module, two or more battery modules are arranged in a length direction of the battery pack to constitute one battery module group, two battery module groups are symmetric with respect to a coolant discharge part, a coolant inlet port is independently formed at a region of the pack case corresponding to each of the battery modules located at a position opposite to the coolant discharge part, the coolant inlet ports are formed such that coolants introduced through the coolant inlet ports are not mixed with each other, each of the coolant inlet ports having a width decreased toward a coolant outlet port, the coolant outlet port is formed at a front or a rear of the pack case in the length direction of the battery pack such that coolants introduced through the coolant inlet ports cool the unit cells of the respective battery modules while passing through the respective battery modules at the same flow rate per unit time and are then discharged out of the pack case via the coolant discharge part, a coolant flow gap is not provided between the battery modules and the pack case facing the battery modules, the coolant inlet ports are formed at regions of the pack case corresponding to outer edges of the respective battery modules on the opposite side of the coolant outlet port such that a coolant flow channel is defined between each of the coolant inlet ports and the coolant outlet port, each coolant flow channel extending between the respective coolant inlet port and the coolant outlet port has a single bend, and a suction fan to provide flow driving force to the coolants is mounted in the coolant outlet port.