# US 11,909,053 B2 · Resin composition and battery module comprising the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,053 B2 - Document ID: US11909053B2 - Status: Granted - Kind: B2 - Application number: 16/965,092 - Filed: 2019-02-19 - Published: 2021-01-28 - Granted: 2024-02-20 - Earliest claimed: 2018-04-20 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Yoon Gyung Cho; Se Woo Yang; Yang Gu Kang; Eun Suk Park; Hyun Suk Kim; Hyoung Sook Park; Sang Min Park; Young Jo Yang - Web page: https://patentgrep.com/patent/US11909053B2 ## CPC - H01M 50/116: characterised by the material - B60L 50/50: using propulsion power supplied by batteries or fuel cells - B60L 58/21: having the same nominal voltage - C08G 18/3206: {aliphatic} - C08G 18/4277: {Caprolactone and/or substituted caprolactone} - C08G 18/664: {with compounds of group C08G18/3203} - C08G 18/73: acyclic - C08K 3/22: of metals - C08L 75/06: from polyesters - C09J 175/06: from polyesters - H01M 10/653: characterised by electrically insulating or thermally conductive materials - H01M 50/211: adapted for pouch cells - H01M 50/227: Organic material - H01M 50/278: Organic material - B60L 50/60: using power supplied by batteries (in combination with fuel cells B60L50/75) - C08K 2003/2227: {of aluminium} - Y02E 60/10: Energy storage using batteries - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The present application relates to a resin composition, a battery module comprising a cured product of the resin composition, a manufacturing method thereof and a battery pack. According to one example of the present application, injection processability of the resin composition can be improved, overloading of injection equipment can be prevented, and the battery module having excellent insulation properties can be provided. ## Claims ### Claim 1 A resin composition comprising a main resin and a curing agent, wherein the main resin comprises a polyol resin comprising an ester polyol resin, the curing agent comprises a polyisocyanate, and at least one of the main resin or the curing agent comprises a filler in an amount of 100 parts by weight to 2,000 parts by weight relative to 100 parts by weight of the sum of the polyol resin and the polyisocyanate, and wherein the resin composition satisfies Equations 1 and 2: 10≤initial load value(Li)≤40 [Equation 1] 1≤load change rate(Lf/Li)≤3 [Equation 2] wherein, Li is an initial load value (kgf) measured immediately after the main resin and the curing agent are mixed and Lf is an aging load value (kgf) measured at 3 minutes after the main resin and the curing agent are mixed. ### Claim 2 (depends on 1) The resin composition according to claim 1, wherein Lf is 50 kgf or less. ### Claim 3 (depends on 1) The resin composition according to claim 1, wherein when a viscosity is measured in a shear rate range of 0.01 to 10.0/s at room temperature within 60 seconds after mixing the main resin and the curing agent, the viscosity measured at a point of 2.5/s is 150,000 to 500,000 cP. ### Claim 4 (depends on 1) The resin composition according to claim 1, wherein a thixotropic index measured at room temperature within 60 seconds after mixing the main resin and the curing agent is 1.5 or more. ### Claim 5 (depends on 1) The resin composition according to claim 1, wherein the polyol resin has a viscosity measured at a point of 2.5/s, of less than 10,000 cP, as measured at room temperature in a shear rate range of 0.01 to 10.0/s. ### Claim 6 (depends on 1) The resin composition according to claim 1, wherein both the main resin and the curing agent comprises the filler. ### Claim 7 (depends on 1) The resin composition according to claim 1, wherein the ester 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 in a range of 2 to 10, m is a number in a range of 1 to 10, and R1 and R2 are each independently an alkylene having 1 to 14 carbon atoms. ### Claim 8 (depends on 7) The resin composition according to claim 7, wherein the carboxylic acid-derived unit X is derived from one or more compounds selected from the group consisting of a fatty acid compound, an aromatic compound having two or more carboxyl groups, an alicyclic compound having two or more carboxyl groups and an aliphatic compound having two or more carboxyl groups. ### Claim 9 (depends on 8) The resin composition according to claim 8, wherein the aromatic compound having two or more carboxyl groups is phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, or tetrachlorophthalic acid. ### Claim 10 (depends on 8) The resin composition according to claim 8, wherein the alicyclic compound having two or more carboxyl groups is tetrahydrophthalic acid or hexahydrophthalic acid. ### Claim 11 (depends on 8) The resin composition according to claim 8, wherein the aliphatic compound having two or more carboxyl groups is oxalic acid, adipic acid, azelaic acid, sebacic acid, succinic acid, malic acid, glutaric acid, malonic acid, pimelic acid, suberic acid, 2,2-dimethylsuccinic acid, 3,3-dimethylglutaric acid, 2,2-dimethylglutaric acid, maleic acid, fumaric acid or itaconic acid. ### Claim 12 (depends on 7) The resin composition according to claim 7, wherein the polyol-derived unit Y is derived from one or more compounds selected from the group consisting of an alicyclic compound having two or more hydroxyl groups and an aliphatic compound having two or more hydroxyl groups. ### Claim 13 (depends on 12) The resin composition according to claim 12, wherein the alicyclic compound having two or more hydroxyl groups is 1,3-cyclohexanedimethanol or 1,4-cyclohexanedimethanol. ### Claim 14 (depends on 12) The resin composition according to claim 12, wherein the aliphatic compound having two or more hydroxyl groups is ethylene glycol, propylene glycol, 1,2-butylene glycol, 2,3-butylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, 1,2-ethylhexyldiol, 1,5-pentanediol, 1,9-nonanediol, 1,10-decanediol, glycerin or trimethylol propane. ### Claim 15 (depends on 1) The resin composition according to claim 1, wherein the polyisocyanate is an alicyclic polyisocyante, a carbodiimide-modified alicyclic polyisocyanate or an isocyanurate-modified alicyclic polyisocyanate. ### Claim 16 (depends on 1) The resin composition according to claim 1, wherein the filler comprises fumed silica, clay, calcium carbonate (CaCO3), zinc oxide (ZnO), aluminum hydroxide (Al(OH)3), alumina (Al2O3), aluminum nitride, boron nitride, silicon nitride, SiC, BeO or a carbon filler. ### Claim 17 (depends on 1) 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, which is a cured layer of the resin composition according to claim 1 and contacts at least one of the plurality of battery cells, the bottom plate or the sidewalls. ### Claim 18 (depends on 1) A method for manufacturing a battery module comprising steps of: injecting the resin composition according to claim 1 into 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; housing a plurality of battery cells in the module case; and curing the resin composition.