Patent application EP19182506A (EP), filed 2019-06-26
Publication number: EP3757190A1
Title: LIQUID HEAT TRANSFER MIXTURE AND USE THEREOF
Abstract: A liquid heat transfer mixture comprises a mixture of a liquid perfluoropolyether and a liquid alkoxy-perfluoroalkane, wherein the volume ratio of the liquid perfluoropolyether to the liquid alkoxy-perfluoroalkane is from 20:80 to 80:20. Use of the liquid heat transfer mixture is also disclosed.
IPC codes: C09K   5/    10            A I
H01M   8/    04            A I
Claims: number: 1
text: A liquid heat transfer mixture comprising a mixture of a liquid perfluoropolyether and a liquid alkoxy-perfluoroalkane, wherein the volume ratio of the liquid perfluoropolyether to the liquid alkoxy-perfluoroalkane is from 20:80 to 80:20.
number: 2
text: The liquid heat transfer mixture according to claim 1, wherein the perfluoropolyether has a boiling point which is at least 55°C, preferably at least 70°C, more preferably at least 100°C, and which boiling point is higher than the boiling point of the liquid alkoxy-perfluoroalkane.
number: 3
text: The liquid heat transfer mixture according to any of the preceding claims 1, wherein the liquid perfluoropolyether has the general chemical formula of CF<3>-O-(CF<2>(CF<3>)-CF-O)<n>-(CF<2>-O)<m>-CF<3>, and preferably an average molecular weight of at least 340 g/mole, preferably at least 530 g/mole, more preferably at least 580 g/mole such as at least 610, 760, 870 or 1020 g/mole.
number: 4
text: The liquid heat transfer mixture according to any of the preceding claims, wherein the liquid perfluoropolyether is a perfluoropolyether available under the trademark Galden.
number: 5
text: The liquid heat transfer mixture according to any of the preceding claims, wherein the liquid alkoxy-perfluoroalkane comprises a methoxy or ethoxy group bound to a perfluorinated propane, butane, pentane or heptane.
number: 6
text: The liquid heat transfer mixture according to any of the preceding claims, wherein the liquid alkoxy-perfluoroalkane is selected from the group consisting of Methoxy-heptafluoropropane, Methoxy-nonafluorobutane, Ethoxy-nonafluorobutane 3-Methoxyperfluoro(2-methylpentane), 2-(trifluoromethyl)-3-ethoxydodecafluorohexane, 1,1,1,2,3,3-Hexafluoro-4-(1,1,2,3,3,3-hexafluoropropoxy)-Pentane, and 2,3,3,4,4-pentafluoro-5-methoxy-2,5-bis[1,2,2,2-tetrafluoro-1-(trifluoromethyl)ethyl]tetrahydrofuran.
number: 7
text: The liquid heat transfer mixture according to any of the preceding claims, wherein the liquid alkoxy-perfluoroalkane has a specific heat of at least 1040, preferably at least 1140 or at least 1183, more preferably at least 1220 such as at least 1300 J/kg-K.
number: 8
text: The liquid heat transfer mixture according to any of the preceding claims, wherein the liquid alkoxy-perfluoroalkane has a specific heat which is at least 140 J/kg-K larger, and preferably not more than 356 J/kg-K larger, than the specific heat of the perfluoropolyether.
number: 9
text: The liquid heat transfer mixture according to any of the preceding claims, wherein the liquid alkoxy-perfluoroalkane is a liquid alkoxy-perfluoroalkane available under the trademark Novec.
number: 10
text: The liquid heat transfer mixture according to any of the preceding claims, wherein the liquid battery coolant mixture consists of a mixture of the liquid perfluoropolyether and the liquid alkoxy-perfluoroalkane.
number: 11
text: The liquid heat transfer mixture according to any of the preceding claims, wherein the volume ratio of the liquid perfluoropolyether to the liquid alkoxy-perfluoroalkane in the mixture is from 20:80 to 40:60, or alternatively from 80:20 to 60:40, or from 30:70 to 70:30, such as from 40:60 to 60:40, preferably from 45:55 to 55:45, most preferably 50:50.
number: 12
text: Use of the liquid heat transfer mixture according to any of the preceding claims for cooling or heating an electrical component, preferably for cooling or heating an electrical component in an electric vehicle, more preferably for heating or cooling a battery powering an electric vehicle such as an electric car.
number: 13
text: The use according to claim 12, wherein the use comprises bringing the liquid heat transfer mixture into contact with the electrical component, preferably by bringing the liquid heat transfer mixture into contact with electrically conducting parts of the electrical component.
number: 14
text: The use according to claim 13, wherein the use comprises cooling or heating a battery powering an electric vehicle such as a car, wherein the battery comprises a plurality of battery cells and the liquid heat transfer mixture is brought into contact with the terminals of at least a majority of the battery cells.
number: 15
text: The use according to any of the claims 12-14, wherein the electric vehicle is an electrically powered car or a hybrid car having an internal combustion engine and an electrical engine both arranged for powering the car, and wherein the car preferably has a total engine power for powering the car of at least 500 kW.
Office action: search_report, dated 2020-12-30
Prior art cited: ref_id: US2013168049A1
ref_type: patent
severity: background
ref_id: - TUMA P E ET AL: "NEW "GREEN" HEAT TRANSFER FLUIDS", SOLID STATE TECHNOLOGY, PENNWELL CORPORATION, TULSA, OK, US, vol. 43, no. 6, 1 June 2000 (2000-06-01), XP000949558, ISSN: 0038-111X
ref_type: npl
severity: background
ref_id: - "3M Novec 7500 Engineered Fluid", 1 September 2009 (2009-09-01), USA, pages 1 - 8, XP055006988, Retrieved from the Internet <URL:http://multimedia.3m.com/mws/mediawebserver?mwsId=SSSSSu7zK1fslxtUO8_ZP8fSev7qe17zHvTSevTSeSSSSSS--&fn=prodinfo_nvc7500.pdf> [retrieved on 20110913]
ref_type: npl
severity: background
ref_id: - FRÖBA A P ET AL: "Thermophysical Properties of a Refrigerant Mixture of R365mfc (1,1,1,3,3-Pentafluorobutane) and Galden  HT 55 (Perfluoropolyether)", INTERNATIONAL JOURNAL OF THERMOPHYSICS ; JOURNAL OF THERMOPHYSICAL PROPERTIES AND THERMOPHYSICS AND ITS APPLICATIONS, KLUWER ACADEMIC PUBLISHERS-CONSULTANTS BUREAU, NE, vol. 28, no. 2, 31 May 2007 (2007-05-31), pages 449 - 480, XP019501817, ISSN: 1572-9567, DOI: 10.1007/S10765-007-0178-Y
ref_type: npl
severity: background
ref_id: US2013168049
ref_type: patent
severity: background
ref_id: - TUMA P E ET AL, "NEW "GREEN" HEAT TRANSFER FLUIDS", SOLID STATE TECHNOLOGY, PENNWELL CORPORATION, TULSA, OK, US, (20000601), vol. 43, no. 6, ISSN 0038-111X, XP000949558 [A] 1-15 * the whole document *
ref_type: npl
severity: background
ref_id: - "3M Novec 7500 Engineered Fluid", USA, (20090901), pages 1 - 8, URL: http://multimedia.3m.com/mws/mediawebserver?mwsId=SSSSSu7zK1fslxtUO8_ZP8fSev7qe17zHvTSevTSeSSSSSS--&fn=prodinfo_nvc7500.pdf, (20110913), XP055006988 [A] 1-15 * the whole document *
ref_type: npl
severity: background
ref_id: - FRÖBA A P ET AL, "Thermophysical Properties of a Refrigerant Mixture of R365mfc (1,1,1,3,3-Pentafluorobutane) and Galden HT 55 (Perfluoropolyether)", INTERNATIONAL JOURNAL OF THERMOPHYSICS ; JOURNAL OF THERMOPHYSICAL PROPERTIES AND THERMOPHYSICS AND ITS APPLICATIONS, KLUWER ACADEMIC PUBLISHERS-CONSULTANTS BUREAU, NE, (20070531), vol. 28, no. 2, doi:10.1007/S10765-007-0178-Y, ISSN 1572-9567, pages 449 - 480, XP019501817 [A] 1-15 * the whole document *
ref_type: npl
severity: background
Final disposition: pending (2020-12-30)