Method for manufacturing battery pack

Patent metadata

Field	Value
Publication number	US-11094990-B2
Application number	US-201816483307-A
Country	US
Kind code	B2
Filing date	Sep 14, 2018
Priority date	Sep 18, 2017
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

A battery pack manufacturing method is provided. The battery pack manufacturing method is capable of performing quality inspection of a battery module before the resin composition injected into the battery module is sufficiently cured to fix battery cells contained in the battery module.

First claim

The invention claimed is:

1. A method for manufacturing a battery pack comprising:
injecting a resin composition through an inlet formed on a first side of a battery module, wherein the battery module is equipped with a plurality of battery cells;
forming a heat-dissipating adhesive layer on the first side of the battery module; and
performing a quality inspection of the battery module, wherein the first side of the battery module is directed downward at the time of the quality inspection of the battery module.

2. The method according to claim 1 , wherein the heat-dissipating adhesive layer has a thermal conductivity of 2 W/mK or more.

3. The method according to claim 1 , wherein the forming a heating-dissipating adhesive layer comprises attaching a heat-dissipating adhesive sheet comprising a release film and a heat-dissipating adhesive layer to the first side of the battery module.

4. The method according to claim 1 , wherein the forming a heat-dissipating adhesive layer comprises applying a heat-dissipating adhesive composition on the first side of the battery module.

5. The method according to claim 4 , wherein the forming a heat-dissipating adhesive layer comprises applying the heat-dissipating adhesive composition having a thixotropic index (T) in a range of 1 to 8 in accordance with Equation 1 below to the first side of the battery module:
T=V 0.5/ V 5  [Equation 1]

wherein, V 0.5 is a viscosity of the heat-dissipating adhesive composition as measured by a viscometer at a temperature of 25° C., a rotational speed of 0.5 rpm and a CPA-52Z spindle, and V 5 represents a viscosity of the heat-dissipating adhesive composition as measured by a viscometer at a temperature of 25° C., a rotational speed of 5 rpm and a CPA-52Z spindle.

6. The method according to claim 4 , wherein a ratio of area applied with the heat-dissipating adhesive composition is 70% to 99% of area of the first side of the battery module.

7. The method according to claim 4 , wherein the forming the heat-dissipating adhesive layer further comprises applying the heat-dissipating adhesive composition and then curing the heat-dissipating adhesive composition.

8. The method according to claim 4 , wherein the performing the quality inspection of the battery module comprises mounting a supporting member on the battery module, in which the heat-dissipating adhesive composition is applied to the first side, the supporting member supports a battery module portion of a second side to which the heat-dissipating adhesive composition is not applied.

9. The method according to claim 2 , wherein the heat-dissipating adhesive layer has a thermal conductivity of 2 W/mK to 50 W/mK.

Assignees

• Lg Chemical Ltd

Inventors

• Park Eun Suk
• Yang Se Woo
• Cho Yoon Gyung
• Kang Yang Gu
• Kim Hyun Suk
• Park Hyoung Sook
• Park Sang Min
• Yang Young Jo

Classifications

• H01M10/613 Primary

  Cooling or keeping cold · CPC title

• H01M50/227

  Organic material · CPC title

• H01M10/653 Primary

  characterised by electrically insulating or thermally conductive materials · CPC title

• H01M10/655

  Solid structures for heat exchange or heat conduction · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title