JPH0610986B2 - Fuel cell cooler - Google Patents
Fuel cell coolerInfo
- Publication number
- JPH0610986B2 JPH0610986B2 JP14236084A JP14236084A JPH0610986B2 JP H0610986 B2 JPH0610986 B2 JP H0610986B2 JP 14236084 A JP14236084 A JP 14236084A JP 14236084 A JP14236084 A JP 14236084A JP H0610986 B2 JPH0610986 B2 JP H0610986B2
- Authority
- JP
- Japan
- Prior art keywords
- heat exchange
- fuel cell
- exchange tube
- expanded graphite
- cooler
- 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.)
- Expired - Lifetime
Links
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
- H01M8/04067—Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins
- H01M8/04074—Heat exchange unit structures specially adapted for fuel cell
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/02—Constructions of heat-exchange apparatus characterised by the selection of particular materials of carbon, e.g. graphite
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Description
【発明の詳細な説明】 〔発明の利用分野〕 本発明は燃料電池用冷却器に関するものである。TECHNICAL FIELD The present invention relates to a cooler for a fuel cell.
燃料電池は一般に水素と酸素とを電気化学的に反応さ
せ、直流電力として取り出すエネルギー変換装置の一つ
である。この反応は発熱反応であり、電池運転温度を一
定に、効率の良い温度状態に冷却する必要がある。この
ため燃料電池積層体に冷却器が挿入・使用される。A fuel cell is generally one of the energy conversion devices that electrochemically reacts hydrogen and oxygen and takes out as DC power. This reaction is an exothermic reaction, and it is necessary to keep the battery operating temperature constant and cool it to an efficient temperature state. Therefore, the cooler is inserted and used in the fuel cell stack.
第２図(a)，(b)にはこの積燃料電池用冷却器の従来例が
示されている。第２図(a)に示されているように冷却器
１は１枚の冷却板２、この冷却板２の溝内に充填物３を
介して埋設した熱交換器４より構成されている。そして
この冷却板２と熱交換管４との間の空隙に充填される充
填物３は結着剤、硬化剤等体積変化を伴う物質を含むペ
ーストが用いられていた。このため充填物３中にボイド
が発生し、冷却板２と熱交換管４との間の熱抵抗が大き
くなる欠点があつた。FIGS. 2 (a) and 2 (b) show a conventional example of this cooler for a fuel cell. As shown in FIG. 2 (a), the cooler 1 is composed of one cooling plate 2 and a heat exchanger 4 embedded in the groove of the cooling plate 2 with a filler 3 interposed therebetween. As the filler 3 filled in the space between the cooling plate 2 and the heat exchange tube 4, a paste containing a substance such as a binder and a curing agent that changes in volume is used. Therefore, there is a drawback that voids are generated in the filler 3 and the thermal resistance between the cooling plate 2 and the heat exchange tube 4 increases.
第２図(b)は第２図(a)と同じ充填物３を使用した場合
で、２枚の冷却板２を使用した例である。すなわち並設
した２枚の冷却板２間に跨つて設けた溝内に、充填物３
を介して熱交換管４を埋設した場合である。この場合に
も第２図(a)の場合と同様に冷却板２と熱交換管４との
間の熱抵抗が大きくなつてしまう。FIG. 2 (b) shows an example in which the same filler 3 as in FIG. 2 (a) is used and two cooling plates 2 are used. That is, the filler 3 is placed in the groove provided across the two cooling plates 2 arranged side by side.
This is a case where the heat exchange tube 4 is buried via the. Also in this case, the thermal resistance between the cooling plate 2 and the heat exchange tube 4 increases as in the case of FIG. 2 (a).
〔発明の目的〕 本発明は以上の点に鑑みなされたものであり、冷却板と
熱交換管との間の熱抵抗の低減を可能とした燃料電池用
冷却器を提供することを目的とするものである。[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is to provide a cooler for a fuel cell capable of reducing thermal resistance between a cooling plate and a heat exchange tube. It is a thing.
すなわち本発明は冷却板と、この冷却板の溝内に充填物
を介して埋設された熱交換管とを備えた燃料電池用冷却
器において、前記充填物を、膨張黒鉛材で形成したこと
を特徴とするものであり、これによつて充填物は膨張黒
鉛材で形成されるようになる。That is, the present invention relates to a cooler for a fuel cell comprising a cooling plate and a heat exchange tube embedded in a groove of the cooling plate via a filling, wherein the filling is formed of an expanded graphite material. It is a feature that allows the packing to be formed of expanded graphite material.
発明者はどのようにすれば冷却板と熱交換管との熱抵抗
が低減できるかを検討した。熱抵抗を低減させるには充
填物中にボイドが発生しないようにすればよく、それに
は結着剤や硬化剤等体積変化を伴う物質を含まない充填
物を使用すればよい。この使用目的に合つたものとして
膨張黒鉛に着目した。それは次のような理由からであ
る。膨張黒鉛は母材の黒鉛粉末を例えば硫酸、硝酸等の
強酸のもとで湿式酸化し、これを急激に温度を900℃に
上げて作られるものである。このようにすると結晶間隔
が大きくなり、これを圧縮して使用すると結着剤や硬化
剤等を使用しなくても所望の成型物が得られるからであ
る。従つてこの膨張黒鉛よりなる材料例えば膨張黒鉛の
シートを充填物として使用すれば所期の効果が得られる
ことが確かめられた。勿論黒鉛なので熱伝導性もよい。
そこで本発明では充填物を膨張黒鉛材で形成した。この
ようにすることにより冷却板と熱交換管との間の熱抵抗
の低減を可能とした燃料電池用冷却器を得ることを可能
としたものである。The inventor studied how to reduce the thermal resistance between the cooling plate and the heat exchange tube. In order to reduce the thermal resistance, it is sufficient to prevent voids from being generated in the filler, and a filler that does not contain a substance such as a binder or a curing agent that causes a volume change may be used for that. Focusing on expanded graphite as a material that meets this purpose of use. The reason is as follows. Expanded graphite is produced by wet-oxidizing a graphite powder of a base material in a strong acid such as sulfuric acid or nitric acid, and rapidly raising the temperature to 900 ° C. This is because the crystal interval becomes large, and if this is used after being compressed, a desired molded product can be obtained without using a binder, a curing agent, or the like. Therefore, it was confirmed that the desired effect can be obtained by using a material made of this expanded graphite, for example, an expanded graphite sheet as a filling material. Of course, since it is graphite, it has good thermal conductivity.
Therefore, in the present invention, the filler is made of expanded graphite material. By doing so, it is possible to obtain the fuel cell cooler capable of reducing the thermal resistance between the cooling plate and the heat exchange tube.
以下、図示した実施例に基づいて本発明を説明する。第
１図には本発明の一実施例が示されている。なお従来と
同じ部品には同じ符号を付したので説明を省略する。本
実施例では充填物３ａを、膨張黒鉛よりなるシートで形
成した。このようにすることにより充填物３ａは膨張黒
鉛よりなるシートで形成されるようになつて、冷却板２
と熱交換管４との間の熱抵抗の低減を可能とした燃料電
池用冷却器１ａを得ることができる。Hereinafter, the present invention will be described based on the illustrated embodiments. FIG. 1 shows an embodiment of the present invention. Since the same parts as those of the prior art are designated by the same reference numerals, the description thereof will be omitted. In this embodiment, the filler 3a is formed of a sheet made of expanded graphite. By doing so, the filler 3a is formed of a sheet made of expanded graphite, and the cooling plate 2
It is possible to obtain the fuel cell cooler 1a capable of reducing the thermal resistance between the heat exchange tube 4 and the heat exchange tube 4.
すなわち並設した２枚の冷却板２間に跨つて設けた溝内
に、充填物３ａを介して熱交換管４を埋設した。そして
この充填物３ａを膨張黒鉛よりなるシートで形成した
が、熱交換管４の表面を膨張黒鉛よりなるシートで覆
い、このシートを圧縮して溝内に埋設した。このように
することにより従来のように結着剤や硬化剤等体積変化
を伴う物質を含ませなくとも膨張黒鉛シートで冷却板２
と熱交換管４との間が充填されるようになつて、充填物
３ａ中にボイドの発生がなくなり、冷却板２と熱交換管
４との間の熱抵抗を低減することができ、冷却効果を向
上させることができる。また膨張黒鉛シートは可撓性が
あるので冷却板２と熱交換管４とが堅牢に密着されるの
みならず、膨張黒鉛は純黒鉛材料のため酸性、アルカリ
性の電解質に対する腐食の懸念もない。That is, the heat exchange tube 4 was embedded in the groove provided across the two cooling plates 2 arranged side by side via the filling 3a. The filling 3a was formed of a sheet of expanded graphite, but the surface of the heat exchange tube 4 was covered with a sheet of expanded graphite, and the sheet was compressed and embedded in the groove. By doing so, it is possible to use the expanded graphite sheet to cool the cooling plate 2 without including a substance such as a binder or a curing agent that changes in volume as in the conventional case.
The space between the heat exchange tube 4 and the heat exchange tube 4 is filled, voids are not generated in the filling 3a, and the thermal resistance between the cooling plate 2 and the heat exchange tube 4 can be reduced, and cooling can be performed. The effect can be improved. Further, since the expanded graphite sheet is flexible, not only the cooling plate 2 and the heat exchange tube 4 are firmly adhered to each other, but also the expanded graphite is a pure graphite material, so that there is no fear of corrosion to acidic or alkaline electrolytes.
なお本実施例では膨張黒鉛材に膨張黒鉛よりなるシート
を使用したが、これに限るものではなく、膨張黒鉛より
なる材料で同様な効果を奏するものであればよい。Although a sheet made of expanded graphite is used as the expanded graphite material in the present embodiment, the present invention is not limited to this, and a material made of expanded graphite may be used as long as it exhibits the same effect.
上述のように本発明は冷却板と熱交換管との間の充填物
が膨張黒鉛材で形成されるようになつて、冷却板と熱交
換管との間の熱抵抗が小さくなり、冷却板と熱交換管と
の間の熱抵抗の低減を可能とした燃料電池用冷却器を得
ることができる。As described above, according to the present invention, the filling material between the cooling plate and the heat exchange tube is formed of the expanded graphite material, so that the thermal resistance between the cooling plate and the heat exchange tube is reduced, It is possible to obtain a fuel cell cooler capable of reducing the thermal resistance between the heat exchange tube and the heat exchange tube.
第１図は本発明の燃料電池用冷却器の一実施例の縦断側
面図、第２図(a)，(b)は従来の燃料電池用冷却器の(a)
は冷却板が１枚、(b)は冷却板が２枚の場合の縦断側面
図である。 １ａ……冷却器、２……冷却板、３ａ……充填物、４…
…熱交換管。FIG. 1 is a vertical side view of an embodiment of a cooler for a fuel cell of the present invention, and FIGS. 2 (a) and 2 (b) are (a) of a conventional cooler for a fuel cell.
FIG. 3A is a vertical sectional side view in the case where one cooling plate is provided and FIG. 1a ... cooler, 2 ... cooling plate, 3a ... filling material, 4 ...
… Heat exchange tubes.
Claims (1)
内に充填物を介して埋設された熱交換管を備えた燃料電
池用冷却器において、前記充填物を膨張黒鉛材で形成し
たことを特徴とする燃料電池用冷却器。1. A cooler for a fuel cell, comprising a heat exchange tube buried in a groove provided between two parallelly arranged cooling plates via a filler, wherein the filler is an expanded graphite material. A fuel cell cooler characterized by being formed by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14236084A JPH0610986B2 (en) | 1984-07-11 | 1984-07-11 | Fuel cell cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14236084A JPH0610986B2 (en) | 1984-07-11 | 1984-07-11 | Fuel cell cooler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6122573A JPS6122573A (en) | 1986-01-31 |
| JPH0610986B2 true JPH0610986B2 (en) | 1994-02-09 |
Family
ID=15313567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14236084A Expired - Lifetime JPH0610986B2 (en) | 1984-07-11 | 1984-07-11 | Fuel cell cooler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0610986B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0638339B2 (en) * | 1986-07-16 | 1994-05-18 | 三菱電機株式会社 | Cooling device for fuel cells |
| JPH07105239B2 (en) * | 1988-05-06 | 1995-11-13 | 富士電機株式会社 | Fuel cell cooling body |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57162273A (en) * | 1981-03-30 | 1982-10-06 | Toshiba Corp | Fuel battery and its production method |
| JPS58166662A (en) * | 1982-03-26 | 1983-10-01 | Mitsubishi Electric Corp | Manufacturing method of temperature regulator for fuel cell |
| JPS58166663A (en) * | 1982-03-26 | 1983-10-01 | Mitsubishi Electric Corp | Temperature regulator for fuel cell |
-
1984
- 1984-07-11 JP JP14236084A patent/JPH0610986B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6122573A (en) | 1986-01-31 |
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