US20060145120A1 - Cooling liquid composition for fuel cell - Google Patents

Cooling liquid composition for fuel cell Download PDF

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Publication number
US20060145120A1
US20060145120A1 US11/330,015 US33001506A US2006145120A1 US 20060145120 A1 US20060145120 A1 US 20060145120A1 US 33001506 A US33001506 A US 33001506A US 2006145120 A1 US2006145120 A1 US 2006145120A1
Authority
US
United States
Prior art keywords
methyl
coolant
butene
hexyne
octene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/330,015
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English (en)
Inventor
Hiroshi Egawa
Nobuyuki Kaga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shishiai KK
Original Assignee
Shishiai KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shishiai KK filed Critical Shishiai KK
Assigned to SHISHIAI-KABUSHIKIGAISHA reassignment SHISHIAI-KABUSHIKIGAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EGAWA, HIROSHI, KAGA, NOBUYUKI
Publication of US20060145120A1 publication Critical patent/US20060145120A1/en
Priority to US12/046,244 priority Critical patent/US8187763B2/en
Abandoned legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04029—Heat exchange using liquids
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/08—Materials not undergoing a change of physical state when used
    • C09K5/10—Liquid materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the present invention relates to a coolant composition for fuel cells, and specifically to such a coolant composition for automobiles.
  • the present invention relates to a coolant composition that provides an excellent antifreeze property and is capable of maintaining the electrical conductivity of the coolant adequately low for a long period of time.
  • a fuel cell unit which generates electrical power is provided as a stack of a plurality of fuel cells. During power generation, heat is generated from the fuel cells. To cool the fuel cell unit, a cooling plate is inserted between every few fuel cells.
  • a fluid path for coolant is provided in each cooling plate in order to cool the fuel cell unit.
  • a coolant for a fuel cell unit circulates within the stack of the fuel cells and cools the fuel cells. If the electrical conductivity of the coolant is “high”, the electricity generated in the fuel cells partially flows into the coolant, resulting in loss of electrical power generated in the fuel cell unit.
  • the temperature of the coolant is subject to the atmospheric temperature when not in use.
  • the atmospheric temperature falls below the freezing point, pure water coolant would freeze, potentially leading to physically damaging the cooling plates.
  • the battery performance of the fuel cell system would then deteriorate.
  • Such a glycol may be oxidized during use, and may produce ionic substances. Such ionic substances raise electrical conductivity of the coolant.
  • the coolant paths of a fuel cell system are generally provided with an ion exchanger or ion exchange resin to remove such ionic substances.
  • the capacity of the ion exchanger deteriorates as time goes by because the ion exchanger is “consumed” for removal of the ionic substances.
  • an object of the present invention to provide an anti-freeze coolant composition for a fuel cell unit, which is capable of maintaining the electrical conductivity of a coolant low for a long period of time by suppressing generation of ionic substances in the coolant.
  • the coolant composition of the present invention is characterized by containing at least one aliphatic alcohol having unsaturated bonds in the molecules thereof.
  • the base component of this coolant composition possesses low electrical conductivity and antifreeze properties.
  • the base component contains at least one ingredient selected from the group consisting of water, glycols, saturated alcohols and glycol ethers.
  • the glycols may be ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butanediol, 1,5-pentanediol and hexylene glycol.
  • the saturated alcohols may be methanol, ethanol, propanol, butanol, pentanol, hexanol, heptanol and octanol.
  • the glycol ethers may be alkyl ether of polyoxy alkylene glycol, such as ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, tetraethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monoethyl ether, triethylene glycol monoethyl ether, tetraethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, triethylene glycol monobutyl ether and tetraethylene glycol monobutyl ether.
  • polyoxy alkylene glycol such as ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, tetraethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monoethyl ether, triethylene glycol monoethyl ether, tetraethylene glycol
  • the aliphatic alcohols possess unsaturated bonds in the molecules, and maintain electrical conductivity low.
  • the electrical conductivity of the coolant according to the present invention is maintained at 10 ⁇ S/cm or below, and the fluctuation in electrical conductivity of the coolant during a long use is maintained within the range from 0 ⁇ S/cm to 10 ⁇ S/cm.
  • the aliphatic alcohols of the present invention are not easily removed by the ion exchanger used in the cooling system and are capable of keeping the electrical conductivity of the coolant low for a long time. As they are not removed by the ion exchanger, the expected function of the aliphatic alcohols according to the present invention will last long without losing ion exchanging capability.
  • the aliphatic alcohols have 2 to 20 carbon atoms per molecule.
  • the aliphatic alcohols may be selected from allyl alcohol, 2-butene-1-ol, 3-butene-1-ol, 1-butene-3-ol, 2-methyl-2-propene-1-ol, 4-pentene-1-ol, 1-pentene-3-ol, 2-pentene-1-ol, 2-methyl-3-butene-2-ol, 3-methyl-2-butene-1-ol, 3-methyl-3-butene-1-ol, 2-hexene-1-ol, 3-hexene-1-ol, 4-hexene-1-ol, 5-hexene-1-ol, 1-hexene-3-ol, 6-heptene-1-ol, 2-heptene-1-ol, 4-heptene-1-ol, 7-octene-1-ol, 2-octene-1-ol, 3-octene-1-ol, 5-oct
  • the aliphatic alcohols are contained within the range from 0.01 part by weight to 15 parts by weight against 100 parts by weight of the base component. Outside of this range, satisfactory results will not be attained or waste will result.
  • the coolant composition of the present invention may additionally contain an antifoaming agent, coloring agent, etc.
  • a conventionally known rust inhibitor such as molybdate, tungstate, sulfate, nitrate and/or benzoate may also be added in an amount that does not increase the electrical conductivity of the coolant of the present invention.
  • Embodiment 1 consisted of ethylene glycol, 3-butene-1-ol (aliphatic unsaturated alcohol), and deionized water.
  • Embodiment 2 consisted of ethylene glycol, 4-pentene-1-ol (aliphatic unsaturated alcohol), and deionized water.
  • Embodiment 3 consisted of ethylene glycol, 2,5-dimethyl-3-hexyne-2,5-diol (aliphatic unsaturated alcohol), and deionized water.
  • Comparison 1 consisted of ethylene glycol and deionized water.
  • Comparison 2 consisted of ethylene glycol, 1-butanol (aliphatic saturated alcohol), and ion exchanged water.
  • Comparison 3 consisted of ethylene glycol, 1-pentanol (aliphatic saturated alcohol), and dedionized water.
  • Embodiments 1 to 3 and Comparisons 1 to 3 each had an initial electrical conductivity 0.3 ⁇ S/cm or below, while each of the electrical conductivities of Comparisons 1 to 3 after oxidation was much higher (42.6 for Comparison 1, 43.9 for Comparison 2, and 39.6 for Comparison 3). In contrast, the electrical conductivities of Embodiments 1 to 3 after oxidation all remained within the range from 0 ⁇ S/cm to 9.5 ⁇ S/cm (9.5 for Embodiment 1, 4.4 for Embodiment 2, and 2.9 for Embodiment 3).
  • the aliphatic alcohol having unsaturated bonds in the molecules contained in the coolant composition of the present invention prevents generation of ionic substances as a result of oxidation of the base component of the coolant otherwise and is capable of maintaining the electrical conductivity of the coolant low for a long period of time.
  • the aliphatic alcohol in the coolant composition of the present invention is not easily removed by an ion exchanger in cooling systems, the duration of effectiveness of the ion exchanger is extended.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Combustion & Propulsion (AREA)
  • Sustainable Energy (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Lubricants (AREA)
  • Fuel Cell (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Liquid Carbonaceous Fuels (AREA)
US11/330,015 2003-07-11 2006-01-11 Cooling liquid composition for fuel cell Abandoned US20060145120A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/046,244 US8187763B2 (en) 2003-07-11 2008-03-11 Cooling liquid composition for fuel cell

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
PCT/JP2003/008879 WO2005006476A1 (fr) 2003-07-11 2003-07-11 Composition de fluide de refroidissement pour batterie de piles a combustible
WOPCT/JP03/08879 2003-07-11
PCT/JP2003/016646 WO2005006475A1 (fr) 2003-07-11 2003-12-24 Composition de liquide de refroidissement pour pile a combustible

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2003/016646 Continuation WO2005006475A1 (fr) 2003-07-11 2003-12-24 Composition de liquide de refroidissement pour pile a combustible

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/046,244 Continuation US8187763B2 (en) 2003-07-11 2008-03-11 Cooling liquid composition for fuel cell

Publications (1)

Publication Number Publication Date
US20060145120A1 true US20060145120A1 (en) 2006-07-06

Family

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US11/330,015 Abandoned US20060145120A1 (en) 2003-07-11 2006-01-11 Cooling liquid composition for fuel cell
US12/046,244 Active 2025-03-30 US8187763B2 (en) 2003-07-11 2008-03-11 Cooling liquid composition for fuel cell

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12/046,244 Active 2025-03-30 US8187763B2 (en) 2003-07-11 2008-03-11 Cooling liquid composition for fuel cell

Country Status (5)

Country Link
US (2) US20060145120A1 (fr)
EP (1) EP1653544A4 (fr)
CN (1) CN100382371C (fr)
AU (2) AU2003248060A1 (fr)
WO (2) WO2005006476A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070075120A1 (en) * 2005-06-24 2007-04-05 Bo Yang Methods for inhibiting corrosion in brazed metal surfaces and coolants and additives for use therein
US20080251756A1 (en) * 2005-03-02 2008-10-16 Shishiai-Kabushikigaisha Coolant composition for fuel cell
US20090219693A1 (en) * 2008-03-03 2009-09-03 Harris Corporation Cooling system for high voltage systems
US8187763B2 (en) 2003-07-11 2012-05-29 Honda Motor Co., Ltd. Cooling liquid composition for fuel cell
CN113652210A (zh) * 2021-06-28 2021-11-16 中国船舶重工集团公司第七一八研究所 一种低电导率长效冷却液及其制备方法
WO2023111687A1 (fr) * 2021-12-17 2023-06-22 Cci Holdings, Inc. Système de transfert de chaleur à inhibiteurs organiques non ioniques compatibles avec une exposition au flux dans des opérations de pile à combustible

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5027656B2 (ja) * 2005-03-30 2012-09-19 シーシーアイ株式会社 燃料電池用冷却液組成物
CA2577766A1 (fr) * 2006-02-17 2007-08-17 Nuvera Fuel Cells, Inc. Methode de nettoyage des piles a combustible
TWI819397B (zh) * 2020-10-26 2023-10-21 日商信越聚合物股份有限公司 導電性高分子分散液及其製造方法、含導電性高分子的液體及其製造方法、導電性層疊體及其製造方法、以及電容器及其製造方法

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EP1653544A4 (fr) 2010-07-28
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US8187763B2 (en) 2012-05-29
CN1802765A (zh) 2006-07-12
AU2003248060A1 (en) 2005-01-28
AU2003296102A1 (en) 2005-01-28
US20080166615A1 (en) 2008-07-10
EP1653544A1 (fr) 2006-05-03

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