Battery pack

Patent metadata

Field	Value
Publication number	US-2016372805-A1
Application number	US-201515121404-A
Country	US
Kind code	A1
Filing date	Feb 24, 2015
Priority date	Feb 25, 2014
Publication date	Dec 22, 2016
Grant date	—

Abstract

The present invention relates to a battery pack. A battery pack according to an embodiment of the present invention includes: a cell module including a cell for generating electric energy; a heat sink in which cooling water for absorbing heat energy generated in the cell module flows; and a vortex flow forming unit disposed in the heat sink to form a vortex flow.

First claim

1 . A battery pack comprising:
cell modules including cells to generate electric energy; heat sinks configured to absorb thermal energy generated from the cell modules, cooling water flowing in the heat sinks; and vortex forming parts disposed in the heat sinks to form vortexes.

2 . he battery pack according to claim 1 , wherein:
the heat sink forms a plurality of main paths to guide cooling water in the width direction of the vehicle and connection paths extending in the forward and backward directions of a vehicle to interconnect the main paths; and the vortex forming parts are provided in plural number and formed in the connection paths or the main paths.

3 . The battery pack according to claim 2 , wherein:
the vortex forming parts provided in plural number are formed in the 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 heat sinks are provided in plural number; and the heat sinks are connected in parallel.

5 . The battery pack according to claim 1 , wherein the heat sink includes:
a first cooling plate contacting the cell modules and absorbing thermal energy; and a second cooling plate combined with the first cooling plate to form a flow path, wherein the vortex forming parts include: first vortex forming parts formed on the first cooling plate; and third vortex forming parts disposed on the second cooling plate so as to be symmetrical to the first vortex forming parts.

6 . The battery pack according to claim 1 , further comprising thermal pads configured to transfer thermal energy of the cell modules to the heat sinks.

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

8 . The battery pack according to claim 1 , wherein water inlet ports of the heat sinks to introduce cooling water thereinto and water outlet ports of the heat sinks to discharge cooling water therefrom are connected in series so as to form one flow path.

9 . The battery pack according to claim 1 , wherein water inlet ports of the heat sinks to introduce cooling water thereinto and water outlet ports of the heat sinks to discharge cooling water therefrom are connected in parallel so as to form a plurality of flow paths.

10 . The battery pack according to claim 1 , wherein a ratio of the length W of the vortex forming parts in the forward and backward directions 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.

11 . The battery pack according to claim 1 , wherein the heat sink includes:
a first cooling plate contacting the cell modules and absorbing thermal energy; and a second cooling plate combined with the first cooling plate to form a flow path, wherein the vortex thinning parts include: first vortex forming parts formed on the first cooling plate; and second vortex forming parts formed on the second cooling plate, wherein one of the first vortex forming parts and the second vortex forming parts is disposed at the rear of the other of the first vortex forming parts and the second vortex forming parts in the flow direction of cooling water.

12 . The battery pack according to claim 1 , wherein the heat sink includes:
a first cooling plate contacting the cell modules and absorbing thermal energy; and a second cooling plate combined with the first cooling plate to form a flow path, 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.

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

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

15 . The battery pack according to claim 1 , wherein the heat sink includes:
a first cooling plate contacting the cell modules and absorbing thermal energy; and a second cooling plate combined with the first cooling plate to form a flow path, wherein the vortex forming parts protrude from the first cooling plate to guide cooling water, flowing along the first cooling plate, to the second cooling plate, and protrude from the second cooling plate to guide cooling water, flowing along the second cooling plate, to the first cooling plate.

Assignees

• Lg Electronics Inc

Inventors

• Kim Taejin
• Yoon Sanghun
• Lee Sanghyun

Classifications

• H01M10/625

  Vehicles · CPC title

• B60L58/26

  by cooling · CPC title

• H01M10/6556 Primary

  Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) · CPC title

• B60L50/64

  Constructional details of batteries specially adapted for electric vehicles · CPC title

• H01M10/613

  Cooling or keeping cold · CPC title