Resin composition

Patent metadata

Field	Value
Publication number	US-11634533-B2
Application number	US-201916646262-A
Country	US
Kind code	B2
Filing date	Mar 19, 2019
Priority date	Mar 28, 2018
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

The present application relates to a composition, a battery module and a battery pack. According to one example of the present application, it is possible to provide a battery module and a battery pack which have improved heat dissipation properties, adhesive force, adhesion reliability and processability as well as excellent power to volume.

First claim

The invention claimed is:

1. A urethane-based composition comprising:
a main composition part comprising an ester-based polyol resin;
a curing agent composition part comprising a non-aromatic polyisocyanate; and
a filler,
wherein the ester-based polyol resin comprised in the urethane-based composition consists of an ester-based polyol resin having a viscosity of 2,000 cP or less at room temperature,
wherein the ester-based polyol resin is an amorphous polyol, in which a crystallization temperature (Tc) and a melting temperature (Tm) are not observed in a DSC (differential scanning calorimetry) analysis, or has a melting temperature (Tm) of less than 15° C.,
wherein the filler is comprised in an amount of 50 to 2,000 parts by weight relative to 100 parts by weight of the sum of the ester-based polyol resin and the polyisocyanate contents,
wherein a mixture of the ester-based polyol resin and polyisocyanate has a glass transition temperature (Tg) of less than 0° C. after curing, and
wherein the urethane-based composition is a two-component room temperature curable composition formulated to be able to be cured when the main composition part and the curing agent composition are mixed at room temperature.

2. The urethane-based composition according to claim 1 , wherein the polyisocyanate has a viscosity of less than 10,000 cP, measured at room temperature.

3. The urethane-based composition according to claim 1 , wherein the polyisocyanate has a viscosity of 2,000 cP or less, measured at room temperature.

4. The urethane-based composition according to claim 1 , wherein the ester-based polyol resin is represented by the following formula 1 or 2:

wherein, X is a carboxylic acid-derived unit, Y is a polyol-derived unit, n is a number within a range of 2 to 10, and m is a number within a range of 1 to 10.

5. The urethane-based composition according to claim 4 , wherein the carboxylic acid-derived unit X is one or more units selected from the group consisting of a phthalic acid unit, an isophthalic acid unit, a terephthalic acid unit, a trimellitic acid unit, a tetrahydrophthalic acid unit, a hexahydrophthalic acid unit, a tetrachlorophthalic acid unit, an oxalic acid unit, an adipic acid unit, an azelaic acid unit, a sebacic acid unit, a succinic acid unit, a malic acid unit, a glutaric acid unit, a malonic acid unit, a pimelic acid unit, a suberic acid unit, a 2,2-dimethylsuccinic acid unit, a 3,3-dimethylglutaric acid unit, a 2,2-dimethylglutaric acid unit, a maleic acid unit, a fumaric acid unit, an itaconic acid unit and a fatty acid unit.

6. The urethane-based composition according to claim 4 , wherein the polyol-derived unit Y is any one or two or more units selected from the group consisting of an ethylene glycol unit, a propylene glycol unit, a 1,2-butylene glycol unit, a 2,3-butylene glycol unit, a 1,3-propanediol unit, a 1,3-butanediol unit, a 1,4-butanediol unit, a 1,6-hexanediol unit, a neopentyl glycol unit, a 1,2-ethylhexyldiol unit, a 1,5-pentanediol unit, a 1,9-nonanediol unit, a 1,10-decanediol unit, a 1,3-cyclohexanedimethanol unit, a 1,4-cyclohexanedimethanol unit, a glycerin unit and a trimethylolpropane unit.

7. The urethane-based composition according to claim 1 , wherein the non-aromatic polyisocyanate is an alicyclic polyisocyanate, a carbodiimide-modified alicyclic polyisocyanate, or an isocyanurate-modified alicyclic polyisocyanate.

8. The urethane-based composition according to claim 1 , wherein the filler comprises alumina, AlN (aluminum nitride), BN (boron nitride), silicon nitride, SiC, or BeO.

9. The urethane-based composition according to claim 8 , wherein the filler is contained in an amount of 100 to 2,000 parts by weight relative to 100 parts by weight of the sum of the ester-based polyol resin and polyisocyanate contents.

10. The urethane-based composition according to claim 1 , which has a first adhesive force (S 1 ) measured with respect to an aluminum pouch when the aluminum pouch is peeling off at a peeling angle of 180° and a peeling speed of 300 mm/min at room temperature after curing of 150 gf/10 mm or more.

11. The urethane-based composition according to claim 10 , which has a ratio of a second adhesive force (S 2 ) measured with respect to an aluminum pouch when the aluminum pouch is peeling off at a peeling angle of 180° and a peeling speed of 300 mm/min after curing and storage under the conditions of 40 to 100° C. and 75% relative humidity for 10 days to the first adhesive force (S 1 ) of 70% or more.

12. A battery module comprising a module case having a top plate, a bottom plate and sidewalls, wherein an inner space is formed by the top plate, the bottom plate, and the sidewalls;
a plurality of battery cells existing in the inner space of the module case; and
a resin layer formed by curing the urethane-based composition according to claim 1 and in contact with the plurality of battery cells.

13. A battery pack comprising one or more battery modules according to claim 12 .

14. An automobile comprising the battery module according to claim 12 .

15. A method of manufacturing a battery module, comprising injecting the urethane-based composition according to claim 1 into a module case, housing a battery cell in the module case, and curing the urethane-based composition to form the resin layer.

16. The method of manufacturing battery module according to claim 15 , wherein the curing of the urethane-based composition is performed by holding the resin composition at room temperature or heating at a temperature in a range of about 30° C. to 50° C. for a predetermined time.

Assignees

• Lg Chemical Ltd

Inventors

• Cho Yoon Gyung
• Lee Ji Yeong
• Yang Se Woo
• Kang Yang Gu
• Park Eun Suk
• Park Sang Min

Classifications

• C08G18/42 Primary

  Polycondensates having carboxylic or carbonic ester groups in the main chain · CPC title

• C08G18/792

  formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates · CPC title

• C09J175/04

  Polyurethanes · CPC title

• C08G18/75

  cycloaliphatic · CPC title

• C08G18/797 Primary

  containing carbodiimide and/or uretone-imine groups · CPC title