Battery pack

1. A battery pack comprising:

one or more cell modules that include cells that are configured to generate electric energy;

one or more heat sinks that are configured to absorb thermal energy generated from the one or more cell modules, and cooling water that flows in the heat sinks; and

vortex forming parts that are disposed in the heat sinks and that are configured to form vortexes,

wherein the one or more heat sinks include:

one or more diaphragms;

a first cooling plate that is configured to contact the one or more cell modules, and that are configured to absorb thermal energy; and

a second cooling plate that is configured to form a flow path in combination with the first cooling plate,

wherein the vortex forming parts are formed in one or more paths,

wherein the vortex forming parts include:

first vortex forming parts that are formed on the first cooling plate; and

second vortex forming parts that are disposed on the second cooling plate,

wherein the first vortex forming parts are configured to protrude from the first cooling plate toward the second cooling plate, and the second vortex forming parts are configured to protrude from the second cooling plate toward the first cooling plate,

wherein one of the first vortex forming parts and the second vortex forming parts are disposed at the rear of the other of the first vortex forming parts and the second vortex forming parts in a flow direction of cooling water, and

wherein the first vortex forming parts and the second vortex forming parts are connected to the one or more diaphragms.

2. The battery pack according to claim 1 , wherein:

the one or more heat sinks form a plurality of main paths that are configured to guide cooling water in a first direction and one or more connection paths that extend in a second direction crossing the first direction to interconnect the plurality of main paths; and

the vortex forming parts are provided in plural number and formed in the connection paths or the plurality of main paths.

3. The battery pack according to claim 2 , wherein:

the vortex forming parts provided in plural number are formed in the plurality of main paths; and

the numbers of the vortex forming parts formed in the respective main paths are the same.

4. The battery pack according to claim 1 , wherein:

the one or more heat sinks are connected in parallel.

5. The battery pack according to claim 1 , further comprising: thermal pads that are configured to transfer thermal energy of the one or more cell modules to the one or more heat sinks.

6. The battery pack according to claim 1 , wherein the vortex forming parts includes at least two kinds of vortex forming parts with different transversal lengths, longitudinal lengths, and heights.

7. The battery pack according to claim 1 , wherein water inlet ports of the one or more heat sinks are configured to introduce cooling water into the one or more heat sinks, water outlet ports of the one or more heat sinks are configured to discharge cooling water from the one or more heat sinks, and wherein the water inlets ports and the water outlet ports are connected in series to form one flow path.

8. The battery pack according to claim 1 , wherein water inlet ports of the one or more heat sinks are configured to introduce cooling water into the one or more heat sinks, and water outlet ports of the one or more heat sinks are configured to discharge cooling water from the one or more heat sinks, and wherein the water inlets ports and the water are connected in parallel.

9. The battery pack according to claim 1 , wherein a ratio of the length W of the vortex forming parts in the second direction based on the main flow direction of cooling water to the protruding height H of the vortex forming parts is 2.5:1 or less.

10. The battery pack according to claim 1 , wherein a ratio of a protruding height of the vortex forming parts to an interval D between the first cooling plate and the second cooling plate is 0.7:1 or less.

11. The battery pack according to claim 1 , wherein separation intervals between the vortex forming parts are different.

12. The battery pack according to claim 1 , wherein the vortex forming parts are disposed to be inclined in an oblique direction with respect to the flow direction of cooling water.