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杭州欧森科技有限公司

新能源设备专业提供商&通信/动力/燃料电池厂工程全案设计

双极板工艺系统开发定制

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浙江省 杭州市

    加工定制 品牌 欧森 型号 HZOS-F9101
    用途 氢燃料电池



      由于质子交换膜燃料电池(
    PEMFC)除具有燃料电池的一般特点(如能量转化率高、环境友好等)外,同时具有可在室温快速启动、寿命长、比功率和比能量高等特点,已成为世界各国研究的热点之一。双极板是PEMFC的关键部件,对其体积、重量、性能都具有重要的影响。而目前,国内外有关双极板的研究主要集中在材料和流场设计两方面,尤以材料设计为研究重点.

           Since proton exchange membrane fuel cell (PEMFC) not only has the general characteristics of fuel cell (such as high energy conversion, environment friendly, etc.), but also has the characteristics of rapid start-up at room temperature, long life, high specific power and specific energy, etc. It has become one of the research hotspots in the world. Bipolar plate is the key component of PEMFC, which has an important influence on its volume, weight and performance. At present, the research on bipolar plate mainly focuses on the material and flow field design, especially the material design.

     

      目前广泛使用的双极板有石墨板、金属板和复合材料板3种类型。

        The currently widely used bipolar plate has three types of graphite plate, metal plate and composite material plate.

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      石墨双极板分为无孔石墨板和注塑石墨板。无孔石墨板一般由碳粉或石墨粉与可石墨化的树脂制备。无孔石墨板在燃料电池环境中就具有化学稳定性好、电导率高和阻气性好等优点;但石墨化加工周期长,流场加工困难使其制造成本高,价格昂贵。注塑石墨双极板采用石墨粉或碳粉与树脂(酚醛树脂、环氧树脂等)、导电胶黏剂成型再经石墨化而成。成型采用注塑、浆注等方法,可直接加工成流场,与机加工相比具有成本低、周期短等优点。但成型后的石墨化程序却又增加了成本。此外,树脂在石墨化过程中会发生收缩导致石墨板发生变形,因此石墨化过程中需要严格控温,控温不当会导致其变形严重。导电良好、耐腐蚀性强的石墨类双极板为PEMFC的商业化进程奠定了良好的开端,也是PEMFC广泛采用的极板材料;但其机械强度差、加工成本高使其在PEMFC的工业化应用中缺泛足够的竟争力。

        Graphite bipolar plate is divided into porous graphite plate and injection graphite plate. Porous graphite plates are usually prepared from carbon or graphite powder and graphitized resins. Porous graphite plate has the advantages of good chemical stability, high conductivity and good gas resistance in fuel cell environment. But the processing period of the graphitization is long, and the processing difficulty of the flow field makes the manufacturing cost high and the price is high. Graphite powder or carbon powder and resin (phenolic resin epoxy resin etc.) are used in injection molding graphite bipolar plate. Conductive adhesive is formed by graphitization. Injection molding, grouting and other methods, can be directly processed into a flow field, compared with machine processing has the advantages of low cost, short cycle and so on. However, the post-formed graphitization process increases the cost. In addition, that shrinkage of the resin in the graphitization process lead to the deformation of the graphite plate, therefore, strict temperature control is required in the graphitization process, and the temperature control can lead to serious deformation. Graphite bipolar plates with good conductivity and corrosion resistance have laid a good beginning for the commercialization of PEMFC and are widely used as polar plate materials for PEMFC. However, its poor mechanical strength and high processing cost make it lack of sufficient competitive force in the industrial application of PEMFC.

     

      金属材料同石墨材料相比具有更好的导电及热传导性能,从而可以提高燃料 电池的输出功率,改善电池热量管理;金属的阻气功能使其成为阻隔氧化和还原剂的理相材料;同时金属材料良好的机加工性能使得流场的加工非常简单。铝、不锈钢、钛和镍是目前世界各国最常用的PEMFC金属双极板材料。最初其厚度约为35mm,加工量大,费用高且体积、质量也较大。为了减小双极板的体积和质量,利于大批量生产,提高燃料电池的体积比功率和质量比功率,采用薄层金属双极板是一个比较好的选择。采用薄金属作双极板材料,不仅易于批量生产,而且双极板的厚度可达到0.10.3mm,因而能够大度提高电池组的比能量和比功率。

        Compared with graphite materials, metal materials have better conductive and heat conduction properties, so that the output power of fuel cells can be improved and the heat management of fuel cells can be improved, and the gas barrier function of metals makes them become the physical phase materials of preventing oxidation and reducing agents. Aluminum, stainless steel, titanium and nickel are the most commonly used PEMFC metal bipolar plate materials in the world. At first, its thickness is about 3 ~ 5 mm, the processing quantity is large, the cost is high, the volume is high, and the quality is also large. In order to reduce the volume and mass of the bipolar plate, the invention is beneficial to mass production, and the volume ratio power and mass ratio power of the fuel cell are improved, and the thin-layer metal bipolar plate is a better choice. And the thickness of the bipolar plate can reach 0.1-0.3 mm, so that the specific energy and the specific power of the battery pack can be greatly improved.

     

      复合板是采用薄金属板或其它强度高的导电板作为分隔板,其厚度一般为0.10.3mm,边框采用塑料、聚砜、碳酸脂等,边框与金属板之间采用导电胶粘接,以注塑与焙烧法制备的有孔薄碳板、石墨板或石墨油毡作为流场板。这样,不但可以提高电池组的体积比功率和质量比功率,而且结合了石墨板和金属板的优点。复合双极板具有耐腐蚀、体积小、质量轻、强度高等特点,是发展的趋势之一。

        The composite plate is a thin metal plate or other high strength conductive plate as a separator, the thickness of which is generally 0.1 × 0.3 mm, the frame is made of plastic, polysulfone, carbonate, etc., and the frame is bonded to the metal plate by conductive adhesive. The porous thin carbon plate, graphite plate or graphite linoleum prepared by injection molding and baking is used as flow field plate. In this way, not only the power of volume ratio and mass ratio of battery pack can be improved, but also the advantages of graphite plate and metal plate can be combined. The composite bipolar plate has the characteristics of corrosion resistance, small volume, light weight and high strength, which is one of the developing trends.

     

      杭州欧森科技有着专业材料研究团队和设计研发、集成团队,并在氢燃料电池行业已有成功的应用生产案例,愿能陪伴你在未来氢能行业稳步前行。

        Hangzhou Olsen Technology has a professional material research team, design and development, integration team, and in the hydrogen fuel cell industry has been successful application production cases, willing to accompany you in the future hydrogen energy industry steadily forward.

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