BATTERY PACK OF NOVEL AIR COOLING STRUCTURE

摘要

Disclosed herein is a battery pack including battery cells or unit modules (unit cells) that can be charged and discharged, wherein the battery pack is configured to have a structure in which a plurality of the unit cells constitutes a battery module, two or more of the battery modules are vertically arranged in a height direction (vertical direction) of the battery pack from a coolant introduction direction of a coolant inlet port to constitute a pair of battery module groups, a flow space ('a coolant introduction part') extending from the coolant inlet port to each battery module group is provided at a middle of a pack case in a state in which the coolant introduction part is located between the respective battery module groups, flow spaces ('coolant discharge parts') extending from the respective battery module groups to coolant outlet ports are provided at an upper part and a lower part of the pack case, and a coolant flow channel defined between the coolant introduction part and the coolant discharge parts is configured to have a structure in which a coolant, introduced through the coolant introduction part, passes by each unit cell to cool each unit cell, and is discharged through the respective coolant discharge parts.