| 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 the unit cells are uprightly arranged in a width direction (a horizontal direction) of the battery pack in a state in which a spacing distance for coolant flow is provided between the respective unit cells to constitute a battery module, a plurality of battery modules is arranged to constitute a battery module group, battery modules groups are vertically arranged from a coolant introduction direction of a coolant inlet port in a height direction (a vertical direction) of the battery pack to have a two or more layer structure or laterally arranged from the coolant introduction direction of the coolant inlet port in a length direction (a horizontal direction) of the battery pack to have a two or more row structure, a coolant introduction part is formed at a lower part of each battery module group, a coolant discharge part includes a first coolant discharge part and a second coolant discharge part, and a coolant flow channel defined between the coolant inlet port and the coolant outlet port is configured to have a structure in which a coolant, introduced through each coolant inlet port, passes by each unit cell to cool each unit cell, passes through the first coolant discharge part and the second coolant discharge part, and is discharged upward through the coolant outlet port. |
