Patent ID: 9093688
Filing Date: 2015-07-28
Classification: B60L,H01M,Y02E,Y02T

Abstract:
1. A battery pack having two or more hexahedral battery modules, each including a plurality of chargeable and dischargeable plate-shaped battery cells or unit modules (unit cells) within a battery module case, mounted in a pack case, wherein the battery pack is used as a power source for driving a vehicle, has a battery capacity of 5 KWh or more, and removes heat generated during the charge and discharge of the unit cells using an air cooling method, the unit cells of each of the battery modules are vertically stacked within the battery module such that the number of the unit cells corresponds to a height of a battery pack installation space defined in the vehicle while neighboring unit cells within the battery module are spaced apart from each other such that a coolant channel is defined between the respective unit cells within the battery module to minimize friction of the coolant passing through the space defined between the respective unit cells, the pack case is formed in a shape corresponding to the battery pack installation space in the vehicle, the hexahedral battery modules being arranged in an inner space of the pack case, a coolant for removing heat from the unit cells is introduced through at least one side of the pack case, passes through the battery modules horizontally, and is discharged through the other side of the pack case, the unit cells have a temperature deviation of less than 4° C., the battery pack installation space in the vehicle is a space defined in a trunk of the vehicle at a rear of a back seat, the battery pack, which will be installed in the space defined in the trunk of the vehicle at the rear of the back seat, is constructed to have a structure in which a pair of battery modules are installed in the pack case such that one battery module is disposed spaced apart by a predetermined spacing distance from the other battery module in the lateral direction, coolant suction ports are formed at regions of the pack case corresponding to the battery modules, and a coolant discharge port is formed at a region of the pack case between the respective battery modules, the coolant suction ports are formed at opposite sides of the pack case, and the coolant suction ports are perpendicular to the coolant discharge port, and the outside of each of the battery modules is spaced apart from the inside of the pack case by a predetermined spacing width to define a coolant channel.