Battery pack and vehicle comprising battery pack

1. A battery pack, comprising:

a plurality of battery cell assemblies, each battery cell assembly having at least one battery cell;

a pack casing having an input port and an output port provided at one side thereof so that a coolant flows in and out therethrough to cool the battery cell, the pack casing accommodating the battery cell assembly to fix and support the battery cell assembly; and

a coolant supply and circulation unit connected to communicate with the input port and the output port to supply and circulate the coolant into the pack casing whereby each battery cell is cooled in contact with the coolant,

wherein the pack casing includes:

a casing body having a plurality of horizontal partitions and vertical partitions to form a plurality of accommodation spaces arranged in a horizontal plane, each accommodation space receiving a corresponding battery cell assembly of the plurality of battery cell assemblies;

a casing cover provided at an upper surface of the casing body; and

a plurality of elastic pressing units provided on the casing cover and arranged in a horizontal plane, each elastic pressing unit being associated with a single corresponding accommodation space to elastically press the corresponding battery cell assembly located therein.

2. The battery pack according to claim 1 ,

wherein the casing body is depressed with a slope or at a right angle corresponding to a planar surface of the battery cell to form a placing groove in which the battery cell assembly is placed.

3. The battery pack according to claim 2 ,

wherein the elastic pressing unit has a pair of inclined regions and a depressed region connecting ends of the inclined regions to be depressed from a planar surface of the casing cover, and

wherein at least a part of the depressed region of the elastic pressing unit supports in contact with a top surface of the battery cell assembly to press the battery cell downwards.

4. The battery pack according to claim 3 ,

wherein an adhesive member is interposed between the battery cell assembly and the elastic pressing unit to fix the battery cell assembly and the elastic pressing unit to each other.

5. The battery pack according to claim 1 ,

wherein the casing body and the casing cover are coupled by using screws, and

wherein the casing cover has first coupling holes formed at regular intervals along a periphery of the elastic pressing unit through the casing cover in a thickness direction, and second coupling holes are formed in the horizontal partitions and the vertical partitions along a length direction at locations corresponding to the first coupling holes so that the screws are accommodated therein.

6. The battery pack according to claim 5 ,

wherein a placing and supporting portion is formed at the first coupling hole by depressing an inner side of the first coupling hole along a length direction so that the screw is placed and supported thereat, and

wherein a sealing member is interposed between the placing and supporting portion and a top surface of the second coupling hole to prevent the coolant from leaking out.

7. The battery pack according to claim 1 ,

wherein at least one coolant circulation hole is formed in the horizontal partition and the vertical partition.

8. The battery pack according to claim 1 ,

wherein the casing cover and the elastic pressing unit are provided integrally by means of press working.

9. The battery pack according to claim 1 ,

wherein the pack casing is made of aluminum material, and

wherein the coolant is an insulating oil.

10. A vehicle, comprising the battery pack defined in claim 1 .

11. A battery pack, comprising:

a battery cell assembly having at least one battery cell;

a pack casing having an input port and an output port provided at one side thereof so that a coolant flows in and out therethrough to cool the battery cell, the pack casing accommodating the battery cell assembly to fix and support the battery cell assembly, and the pack casing including:

a casing body having a plurality of horizontal partitions and vertical partitions to form an accommodation space in which the battery cell assembly is accommodated;

a casing cover provided at an upper surface of the casing body; and

an elastic pressing unit provided on the casing cover to elastically press the battery cell assembly;

a coolant supply and circulation unit connected to communicate with the input port and the output port to supply and circulate the coolant into the pack casing whereby each battery cell is cooled in contact with the coolant; and

an adhesive member located on an inner surface of the casing cover and being interposed between the battery cell assembly and the elastic pressing unit to fix the battery cell assembly and the elastic pressing unit to each other.