Patent application EP19182488A (EP), filed 2019-06-26
Publication number: EP3757189A1
Title: USE OF IONIC LIQUIDS AS COOLANTS FOR VEHICLE ENGINES, MOTORS AND BATTERIES
Abstract: The invention relates to a process for cooling a power unit in a vehicle. The coolant is an ionic liquid that contains an imidazolium salt. The invention also relates to the coolant and the use of the coolant for cooling the power unit such as a battery or a motor in a vehicle.
IPC codes: C09K   5/    10            A I
Claims: number: 1
text: Process for cooling a power unit PU in a vehicle, wherein a coolant C is contacted with the power unit PU, so that heat is transferred from PU to C,characterized in that
number: 2
text: Process according to Claim 1, wherein the power unit PU is selected from the group consisting of battery B, motor M.
number: 3
text: Process according to Claim 1 or 2, wherein the power unit PU is contacted by the ionic liquid IL via a metal surface SM so that heat is transferred from PU to C via SM.
number: 4
text: Process according to Claim 3, wherein the metal in the metal surface SM is selected from aluminium, steel, copper, noble metals, titanium.
number: 5
text: Process according to any of Claims 1 to 4, wherein the IL has the general formula Q<+>(R<1>O)<2>PO<2>-
number: 6
text: Process according to any of Claims 1 to 5, wherein the coolant C further comprises at least one corrosion inhibitor A.
number: 7
text: Process according to Claim 6, wherein the corrosion inhibitor A is selected from benzotriazole, thiazolyl blue tetrazolium bromide, a fatty acid.
number: 8
text: Process according to any of Claims 1 to 5, wherein the coolant C further comprises microparticles and/or nanoparticles of a solid F.
number: 9
text: Process according to Claim 8, wherein the solid F is selected from the group consisting of graphene, graphite, Al<2>O<3>, SiO<2>.
number: 10
text: Coolant C for cooling a power unit PU in a vehicle comprising an ionic liquid IL
number: 11
text: Coolant C according to Claim 10, wherein the coolant C further comprises a corrosion inhibitor.
number: 12
text: Coolant C according to Claim 11, wherein the corrosion inhibitor is selected from benzotriazole, thiazolyl blue tetrazolium bromide, a fatty acid.
number: 13
text: Coolant C according to Claim 10, wherein the coolant C further comprises microparticles and/or nanoparticles of a solid F.
number: 14
text: Coolant C according to Claim 8, wherein the solid F is selected from the group consisting of graphene or graphite, Al<2>O<3>, SiO<2>.
number: 15
text: Use of a Coolant C according to any of Claims 10 to 14 for cooling a power unit PU in a vehicle.
Office action: search_report, dated 2020-12-30
Rejection reasons: novelty_epc_54
Prior art cited: ref_id: US5100571A
ref_type: patent
severity: background
ref_id: - D. G. SUBHEDARAB.M. RAMANIBA. GUPTACA, CASE STUDIES IN THERMAL ENGINEERING, vol. 11, 2018, pages 26 - 34
ref_type: npl
severity: background
ref_id: - M. GOLLIND. BJORK: "Comparative Performance of Ethylene Glycol/ Water and Propylene Glycol/Water Coolants in Automobile Radiators, International Congress & Exposition, Detroit, Michigan", SAE TECHNICAL PAPER SERIES, 26 February 1996 (1996-02-26), ISSN: 0148-7191
ref_type: npl
severity: background
ref_id: - F. WANGL. HANZ. ZHANGX. FANGJ. SHIW. MA, NANOSCALE RESEARCH LETTERS, 2012, pages 314 - 320
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Final disposition: pending (2020-12-30)