Battery module including cooling pin having fixing protrusions formed thereon

Patent metadata

Field	Value
Publication number	US-2018090736-A1
Application number	US-201715715767-A
Country	US
Kind code	A1
Filing date	Sep 26, 2017
Priority date	Sep 29, 2016
Publication date	Mar 29, 2018
Grant date	—

Abstract

Provided is a battery module including a battery cell laminate and a cooling pin. The battery cell laminate includes a plurality of battery cells are arranged adjacent to each other, each of the battery cells having a structure in which an electrode assembly is sealed together with an electrolytic solution, within a battery case. The cooling pin is interposed between the battery cells, the cooling pin having a plate-shaped structure and including a plurality of fixing protrusions that are locally inserted into an outer surface of the battery case of the battery cell that faces the cooling pin and fixed in position with respect to the battery cell.
10

First claim

1 . A battery module comprising:
a battery cell laminate in which a plurality of battery cells are arranged adjacent to each other, each of the battery cells having a structure in which an electrode assembly is sealed together with an electrolytic solution, within a battery case; and a cooling pin interposed between the battery cells and having a plate-shaped structure, the cooling pin comprising a plurality of fixing protrusions that are disposed on an outer surface of the cooling pin and fixed in position with respect to the battery cell by being locally inserted into an outer surface of a battery case of a battery cell facing the cooling pin.

2 . The battery module of claim 1 , wherein the battery case is configured from a laminate sheet comprising a resin outer layer, a metal layer with barrier properties, and a resin sealant layer with thermofusible properties.

3 . The battery module of claim 2 , wherein the fixing protrusion of the cooling pin is inserted into the resin outer layer of the battery case.

4 . The battery module of claim 3 , the insertion depth of the fixing protrusion is smaller than the thickness of the resin outer layer of the battery case.

5 . The battery module of claim 4 , the insertion depth of the fixing protrusion with respect to the resin outer layer ranges from 20% to 90% of the thickness of the resin outer layer.

6 . The battery module of claim 4 , the insertion depth of the fixing protrusion with respect to the resin outer layer is 20 μm to 35 μm.

7 . The battery module of claim 1 , wherein each of the fixing protrusions has a wedge structure with a pyramidal or conical shape.

8 . The battery module of claim 1 , wherein each of the fixing protrusions has a triangular shape when viewed from a vertical cross-section.

9 . The battery module of claim 1 , wherein each of the fixing protrusions has an arrowhead or a harpoon shape when viewed from a vertical cross-section.

10 . The battery module of claim 1 , wherein the fixing protrusions are arranged to be equidistantly spaced apart from each other, and an imaginary line connecting the fixing protrusions located at the outermost positions has a shape that is same as or similar to that of an outer periphery of the cooling pin.

11 . The battery module of claim 1 , wherein the fixing protrusions are arranged to be equidistantly spaced apart from each other, and an imaginary line connecting the fixing protrusions located at the outermost positions has a shape that is same as or similar to that of an outer periphery of the battery cell.

12 . The battery module of claim 1 , wherein the plane size of the cooling pin is 90% to 120% of the plane size of the battery cell.

13 . The battery module of claim 1 , wherein the cooling pin is made of a metallic material, a thermal conductive polymer resin or a resin composite.

14 . The battery module of claim 1 , wherein the cooling pin has a one-side end portion that is vertically bent in a state of protruding outwardly from one surface of the battery cell laminate and forms a bent portion that comes into contact with the one surface of the battery cell laminate.

15 . The battery module of claim 14 , wherein the cooling pin has an inner surface or an outer surface to which a heat sink is attached.

16 . The battery module of claim 15 , wherein the heat sink has a structure that comprises a refrigerant passage through which a refrigerant flows in a liquid or gaseous state.

17 . A device comprising one or more of the battery modules of any one of claim 1 .

Assignees

• Lg Chemical Ltd

Inventors

• Cho Young Suk
• Choi Dae Sik

Classifications

• H01M50/291

  characterised by their shape · CPC title

• H01M50/262

  with fastening means, e.g. locks · CPC title

• H01M50/293

  characterised by the material · CPC title

• H01M50/211

  adapted for pouch cells · CPC title

• H01M50/126

  comprising three or more layers · CPC title