Patent ID: 9537186
Date: 2017-01-03
CPC Classifications: B60K,B60L,H01M,Y02E,Y02T

Claim:
1. A battery pack comprising 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, one or more battery modules are laterally arranged in the width direction of the battery pack 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 flow space (‘a coolant introduction part’) extending from the coolant inlet port to each battery module group is formed at a lower part of each battery module group, another flow space (‘a coolant discharge part’) extending from each battery module group to a coolant outlet port comprises a first coolant discharge part formed at an upper part of each battery module group and a second coolant discharge part located at a left side of at least one battery module group such that the second coolant discharge part communicates with the first 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, wherein a partition plate to simultaneously provide a coolant discharge channel of a lower battery module group and a coolant introduction channel of an upper battery module group is disposed between the respective battery module groups disposed in the vertical direction, and wherein the partition plate is mounted to have a tilted structure in which the coolant introduction part is gradually narrowed in a coolant flow direction with respect to the upper battery module group.