CN110277570A - 燃料电池组的制造方法 - Google Patents
燃料电池组的制造方法 Download PDFInfo
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Abstract
本发明提供一种燃料电池组的制造方法,能够高效地制造燃料电池组,并能够提高接合精度,能够提高发电效率。在燃料电池组的制造方法中,反复根据层叠状态按分隔件(12)、电极组件(11)及分隔件(12)的顺序进行层叠而层叠为燃料电池组(1)。在将电极组件(11)向分隔件(12)层叠时,将电极组件以层叠于分隔件的状态进行按压,向电极组件(11)照射激光(R),由此将电极组件(11)的树脂框架(11B)接合于分隔件(12)。在将分隔件(12)向电极组件(11)层叠时,将分隔件以层叠于电极组件的状态进行按压,向分隔件(12)照射激光(R),由此将分隔件(12)接合于电极组件(11)的树脂框架(11B)。
Description
技术领域
本发明涉及将多个单电池层叠而成的燃料电池组的制造方法。
背景技术
以往,作为这种燃料电池组的制造方法,例如在专利文献1中公开了以下所示的燃料电池组的制造方法。首先,在该制造方法中,准备在高分子电解质膜的两面形成有电极层的膜电极接合体。在该膜电极接合体以隔着垫圈夹持的方式配置一对分隔件,通过激光焊接将垫圈粘接而制造单电池。接着,通过依次层叠所制造的多个单电池,从而制造燃料电池组。
现有技术文献
专利文献
专利文献1:日本特开2009-43604号公报
发明内容
发明所要解决的课题
然而,在专利文献1所记载的制造方法中,在不同的地方独立实施制造单电池的工序和将多个单电池彼此层叠来制造燃料电池组的工序。由此,依次输送所制造的单电池并将它们依次层叠,因此燃料电池组的制造需要时间。
特别是,由于单电池是一对分隔件与膜电极接合体的层叠构造,因此在制造单电池的工序中该层叠构造的各构件彼此之间稍微存在位置偏移的情况下,在制造燃料电池组的工序中,将单电池彼此高精度地层叠多个需要时间。
而且,在制造燃料电池组时,从层叠方向一次性对层叠的单电池进行加压,因此在单电池存在微小的翘曲等的情况下,导致过度的负荷作用于分隔件与膜电极接合体的接合部分,可以设想到作为燃料电池组,可靠性也降低。
本发明是鉴于这样的问题而完成的,本发明提供能够高效地制造可靠性高的燃料电池组的制造方法。
用于解决课题的技术方案
鉴于所述课题,本发明的燃料电池组的制造方法是呈将以一对分隔件夹持电极组件而成的单电池多个层叠的构造的燃料电池组的制造方法,所述电极组件具备在两面层叠有气体扩散层的膜电极接合体和以环绕所述膜电极接合体的外周的方式固定于所述膜电极接合体的树脂框架,所述燃料电池组的制造方法的特征在于,所述制造方法是反复根据所述燃料电池组的层叠状态按所述分隔件、所述电极组件及所述分隔件的顺序进行层叠而制造所述燃料电池组的方法,在将所述电极组件层向所述分隔件层叠时,将所述电极组件以层叠于所述分隔件的状态进行按压,向所述电极组件照射激光,由此使所述树脂框架的树脂熔融而将所述电极组件接合于所述分隔件,在将所述分隔件向所述电极组件层叠时,将所述分隔件以层叠于所述电极组件的状态进行按压,向所述分隔件照射激光,由此经由所述分隔件使所述树脂框架的树脂熔融而将所述分隔件接合于所述电极组件。
根据本发明,在将电极组件向分隔件层叠时,将电极组件以层叠于分隔件的状态进行按压,向电极组件照射激光,由此将电极组件的树脂框架接合于分隔件。另一方面,在将分隔件向电极组件层叠时,将分隔件以层叠于电极组件的状态进行按压,向分隔件照射激光,由此将分隔件加热而接合于电极组件的树脂框架。这样,由于能够一边按压一边将这些构件逐个地依次接合,因此能够抑制由接合时的热影响引起的翘曲等并且在高精度地对位的状态下接合这些构件。而且,能够逐个地层叠电极组件及分隔件而制造单电池,并且也能够一并地制造燃料电池组,因此能够高效地制造燃料电池组。
作为更优选的方式,所述制造方法具备如下工序:在将所述分隔件进一步向构成所述单电池的分隔件层叠时,在进行层叠的所述分隔件与构成所述单电池的分隔件之间经由导电性组件将所述分隔件与构成所述单电池的分隔件接合,所述导电性组件具备导电性构件和以环绕所述导电性构件的外周的方式固定于所述导电性构件的树脂框架,在将所述分隔件与构成所述单电池的分隔件接合时,将所述导电性组件以层叠于构成所述单电池的分隔件的状态进行按压,向所述导电性组件的树脂框架照射激光,由此将所述导电性组件的所述树脂框架接合于构成所述单电池的分隔件,在将所述分隔件向所述导电性组件接合时,将所述分隔件以层叠于所述导电性组件的状态进行按压,向所述分隔件照射激光,由此将所述分隔件接合于所述导电性组件的所述树脂框架。
根据该方式,在构成单电池的分隔件进一步层叠成为下一个单电池的分隔件时,将这些分隔件经由导电性组件接合。由于导电性组件具有导电性构件,因此能够将配置于两侧的单电池的分隔件彼此导通。另外,通过对导电性组件的树脂框架使用与电极组件的树脂框架相同形状的树脂框架,能够更廉价地制造燃料电池组。
发明效果
根据本发明的燃料电池组的制造方法,能够高效且高精度地制造燃料电池组,并且能够提高发电效率。
附图说明
图1是示出利用本实施方式的燃料电池组的制造方法制造的燃料电池组的单电池的分解状态的立体图。
图2是按图1的燃料电池组的单电池分解后的分解立体图。
图3是将图2的燃料电池组的单电池层叠后的状态的主要部分剖视图。
图4是不具有电极的导电性组件的立体图。
图5是将图4的导电性组件层叠后的状态的主要部分剖视图。
图6是制造图1~5所示的燃料电池组的制造装置的分解状态的立体图。
图7是制造图5所示的燃料电池组的制造装置的按压构件的立体图。
图8是示出本实施方式的燃料电池组的制造方法的工序的立面图。
图9A是示出分隔件与电极组件的按压接合工序的主要部分剖视图。
图9B是示出从图9A所示的接合状态起进一步的电极组件与分隔件的按压接合工序的主要部分剖视图。
图10A是示出从图9B所示的接合状态起进一步的分隔件与导电性组件的按压接合工序的主要部分剖视图。
图10B是示出从图10A所示的接合状态起进一步的导电性组件与分隔件的按压接合工序的主要部分剖视图。
具体实施方式
以下,基于附图对本发明的燃料电池组的制造方法的一实施方式进行详细说明。首先,对利用本实施方式的燃料电池组的制造方法制造的燃料电池组进行详细说明。
在图1~5中,通过该制造方法制造的燃料电池组1成为将构成燃料电池组1的一个单位的单电池10多个层叠,具体而言例如为100个而成的构造(堆叠构造)。在本实施方式中,燃料电池组1采用固体高分子型的燃料电池组。
如图1所示,构成燃料电池组1的单电池10具备电极组件11。电极组件11具备在两面形成有气体扩散层的片状的膜电极接合体,这有时也被称为膜电极气体扩散层接合体(MEGA:Membrane Electrode&Gas diffusion layer Assembly,以下称为“MEGA”)11A。电极组件11还具备以环绕MEGA11A的外周的方式固定于MEGA11A的树脂框架11B。
单电池10具备分隔件12、12,在电极组件11的两侧配置分隔件12、12,电极组件11由分隔件12、12夹持。在电极组件11的MEGA11A的高分子电解质膜11a的一面形成有阳极电极(燃料极)11b,在另一面形成有阴极电极(空气极)11c,并且以覆盖这些电极的方式进一步层叠有气体扩散层11d、11d。
高分子电解质膜11a由利用固体高分子材料形成的质子传导性的离子交换膜构成,阳极电极11b和阴极电极11c例如由担载有铂等催化剂的例如多孔质的碳材料形成。气体扩散层11d例如由碳纸或碳布等碳多孔质体、或者金属网或发泡金属等金属多孔质体等具有气体透过性的导电性构件形成。
如上所述,树脂框架11B以环绕MEGA11A的外周的方式固定,通过聚丙烯、聚乙烯等热塑性树脂而外形形成为长方形状,防止分隔件12、12的短路。树脂框架11B具有防止在单电池10的内部通过的流体(燃料气体、氧化剂气体、冷却介质)向外部漏出的功能。
电极组件11的未被树脂框架11B覆盖的内周的中央部成为发电区域14,该发电区域14相当于MEGA11A。在长度方向的两侧的树脂框架11B形成有供燃料气体(具体而言为氢气)、氧化剂气体(例如空气)以及冷却介质(例如冷却水)中的每一个单独通过的开口部。具体而言,在树脂框架11B形成有燃料气体用的一对第一开口部15a、15a、氧化剂气体用的一对第二开口部15b、15b以及冷却介质用的一对第三开口部15c、15c。需要说明的是,与各流体对应的一对开口部中的一方是用于向发电区域14侧送入流体的开口部,另一方是供从发电区域14侧流出的流体通过的开口部。
燃料气体用的第一开口部15a、15a的开口截面比第二开口部15b、15b的开口截面小。这是因为,向第一开口部15a供给高纯度的氢气作为燃料气体,向第二开口部15b供给含有氧气的空气(大气)作为氧化剂气体。另外,燃料气体用的第一开口部15a、15a隔着发电区域14配置在矩形状的电极组件11的对角。同样地,氧化剂气体用的第二开口部15b、15b也隔着发电区域14配置在矩形状的电极组件11的对角。
分隔件12、12由金属薄板材形成,通过对钛合金或者不锈钢等薄板材进行冲压成形而制造。分隔件12的外形形成为与由MEGA11A和树脂框架11B构成的电极组件11相同的形状。配置在电极组件11的两侧的分隔件12、12基本上是相同的结构,在长度方向的两侧与电极组件11同样地形成有能够供燃料气体、氧化剂气体以及冷却介质通过的相同形状的开口部15a~15c。
如图3所示,分隔件12在其中央即主要部分例如沿着长度方向凹凸地形成有多个槽部,形成供燃料气体、氧化剂气体以及冷却介质流动的流路。具体而言,各分隔件12的主要部分形成为波形,该波形为等腰梯形,并且波的顶部平坦,该顶部的两端呈相等角度的棱角。即,各分隔件12的主要部分的形状无论从表面侧观察还是从背面侧观察都是大致相同的形状。分隔件12的顶部与MEGA11A的各气体扩散层11d面接触。
在阳极电极11b侧的气体扩散层11d与分隔件12之间划分出的气体流路13a是供燃料气体流通的流路,在阴极电极11c侧的气体扩散层11d与分隔件12之间划分出的气体流路13b是供氧化剂气体流通的流路。当向经由单电池10相向的一方的气体流路13a供给燃料气体并向另一方的气体流路13b供给氧化剂气体时,在单电池10内产生电化学反应而产生电动势。
某个单电池10和与其相邻的另一个单电池10将阳极电极11b与阴极电极11c相对而配置,相邻的单电池10彼此的分隔件12的顶部进行面接触。另外,该分隔件12、12彼此也可以经由后述的导电性组件16进行面接触。在相邻的两个单电池10、10间进行面接触的分隔件12、12之间划分出的空间中,形成有供对单电池10进行冷却的冷却介质流通的冷却流路13c。需要说明的是,在分隔件12、12之间,在它们的外周缘的附近配置有密封件(未图示)。
在电极组件11,隔着发电区域14而在对角形成有两个引导孔17、17。另外,在分隔件12,也隔着发电区域14而在对角形成有两个引导孔17、17。各引导孔17分别在相同的位置贯通而形成,能够供后述的制造装置的引导轴贯通。需要说明的是,引导孔不限于两处,也可以是三处以上。
在图2及图3中,分隔件12、12彼此直接接触,但例如,如上所述,也可以在分隔件12、12彼此之间配置导电性组件16(参照图4以及图5)。
导电性组件16基本上形成为与电极组件11相同的形状。导电性组件16具备导电性构件16A和以环绕导电性构件16A的外周的方式固定于导电性构件16A的树脂框架16B。导电性构件16A是高分子电解质膜或碳纸等具有导电性的构件即可,没有特别限定,但导电性构件16A优选为金属制的构件,由于流过冷却介质,因此优选为不锈钢或钛合金等耐腐蚀性优异的材料。作为这样的导电性构件16A,例如是金属薄板材或金属网(expand metal)等。在导电性组件16,在矩形状的树脂框架16B的部分也形成有供燃料气体、氧化剂气体、冷却介质通过的相同形状的一对开口部15a~15c。
导电性组件16以在与电极组件11的发电区域14抵接的部位16C导电性构件16A露出的方式配置。在设置有这样的导电性组件16的情况下,如图5所示,在导电性组件16配置有在两侧相邻的单电池10的分隔件12、12,冷却介质用的冷却流路13c由导电性组件16的导电性构件16A分割为两个。
如图1及图2所示,在电极组件11的树脂框架11B和与其接合的分隔件12形成有接合线18作为用于将它们接合的接合部。而且,在设置有图4所示的导电性组件16的情况下,在导电性组件16的树脂框架16B和与其接合的分隔件12也形成有接合线18作为用于将它们接合的接合部。接合线18是利用从后述的制造装置20的激光接合装置24照射的激光R将树脂框架11B的树脂熔融而将电极组件11与分隔件12接合的部分。导电性组件16与分隔件12的接合线18也同样如此。
在此,接合线18以环绕电极组件11的树脂框架11B的内周的发电区域14、供氧化剂气体流动的第二开口部15b、15b以及供冷却介质流动的第三开口部15c、15c的方式进行激光R的照射而形成。并且,供作为燃料气体的氢气流动的第一开口部15a、15a位于接合线18的外侧。需要说明的是,在阳极电极11b侧的面与分隔件12的相向面之间,接合线18断续地形成为从第一开口部15a至发电区域14流动燃料气体。在从该接合线18断续地形成的部分形成有供燃料气体流动的流路(未图示)。
这样,通过接合线18,第一开口部15a被从第二开口部15b及第三开口部15c划分。由此,能够防止在第一开口部15a流动的燃料气体(具体而言为氢气)透过配置于第二开口部15b、第三开口部15c的密封件(未图示)而混入到在它们中流动的氧化剂气体或冷却介质中的情形。需要说明的是,在本实施方式中,通过接合线18将第一开口部15a从第二开口部15b以及第三开口部15c划分,但只要燃料气体不透过密封件,则也可以在接合线18内形成这些开口部。
接着,参照图6~图8对用于制造燃料电池组1的制造装置20进行详细说明。在以下的说明中,对图5所示的构造的燃料电池组1的制造方法进行说明。制造装置20具备成为基座的XY工作台21、设置固定在XY工作台21上的工件台座22、可上下移动地安装于从工件台座22沿铅垂方向竖立设置的两根引导轴22a、22a的按压构件23、以及激光接合装置24。
XY工作台21是能够经由步进电动机、滚珠丝杠等机构使工件台座22在X方向以及Y方向上移动的装置。因此,XY工作台21能够与工件台座22一起在水平方向上移动载置在其上的分隔件12、电极组件11以及导电性组件16。
工件台座22安装于XY工作台21。工件台座22为矩形状,在其对角方向的两处沿铅垂方向竖立设置有所述两根引导轴22a、22a。通过使这些引导轴22a、22a插通引导孔17、17,能够将分隔件12、电极组件11及导电性组件16高精度地载置于工件台座22的规定位置。
按压构件23由俯视为矩形状的金属板材形成,形成为与电极组件11、分隔件12以及导电性组件16大致相同的形状。在按压构件23连续且无缝地形成有能够供从激光接合装置24照射的激光R通过的槽部23a。该槽部23a设定为所述接合线18的形状。因此,按压构件23由槽部23a分割为按压接合线18的外侧的外周部23A和按压接合线18的内侧的内周部23B。
按压构件23为了向下方(-Z方向)按压设置在工件台座22上的分隔件12、电极组件11以及导电性组件16,具备未图示的液压缸等。具体而言,在按压构件23设置有用于将外周部23A以压力P1向下方按压的液压缸和用于将内周部23B以压力P2向下方按压的液压缸。在内周部23B的内部形成有对由激光加热了的电极组件11的发电区域14进行冷却的冷却通路(未图示)。由此,在接合时冷却发电区域14,能够抑制由于阳极电极11b及阴极电极11c被过度加热而导致它们所包含的金属催化剂的性能降低的情形。
在按压构件23的外周部23A,在对角方向上形成有两个引导孔17、17。因此,按压构件23的外周部23A能够在引导孔17、17中插入引导轴22a、22a而利用液压缸等进行上下移动。内周部23B能够以形成于外周部23A的内周的槽部23a成为规定的间隔的方式利用与外周部23A的液压缸不同的液压缸等进行上下移动。通过使各个液压缸进行工作,从而能够按压位于最上层的分隔件12、电极组件11或导电性组件16。
激光接合装置24是利用从光源照射的激光R将分隔件12与电极垫11或导电性组件16接合的装置。激光R通过按压构件23的槽部23a而进行照射,从层叠的分隔件12、电极组件11或导电性组件16中的一方的上方照射激光R,并将其接合于另一方。
例如,在接合前的分隔件12位于最上层且电极组件11位于其下方时,沿着槽部23a照射激光R,对分隔件12进行加热。由此,位于下方的电极组件11的树脂框架11B间接地被加热,树脂框架11B的树脂熔融,能够将分隔件12与位于下方的电极组件11接合。
另一方面,在接合前的电极组件11位于最上层且分隔件12位于其下方时,沿着槽部23a照射激光R,直接加热电极组件11的树脂框架11B。由此,树脂框架11B的树脂熔融,能够将电极组件11与位于下方的分隔件12接合。
而且,在接合前的分隔件12位于最上层且导电性组件16位于其下方时,沿着槽部23a照射激光R,对分隔件12进行加热。由此,位于下方的导电性组件16的树脂框架16B被间接地加热,树脂框架16B的树脂熔融,能够将分隔件12与位于下方的导电性组件16接合。
另一方面,在接合前的导电性组件16位于最上层且分隔件12位于其下方时,沿着槽部23a照射激光R,直接加热导电性组件16的树脂框架16B。由此,树脂框架16B的树脂熔融,能够将导电性组件16与位于下方的分隔件12接合。
参照图6~图10B说明如上述那样构成的本实施方式的燃料电池组1的制造方法。本实施方式的燃料电池组1的制造方法是根据燃料电池组1的层叠状态将分隔件12、电极组件11以及导电性组件16逐个地层叠并接合的制造方法。具体而言,在形成单电池10时,反复按分隔件12、电极组件11及分隔件12的顺序进行层叠,在将层叠的单电池10与成为下一个单电池10的分隔件12层叠之前,将分隔件12的导电性组件16层叠于层叠的单电池10的分隔件12。在本实施方式中,在每一次这样的层叠进行基于激光的接合。
首先,如图8及图9A所示,在作为基座的XY工作台21上固定用于设置分隔件12、电极组件11的工件台座22。然后,使工件台座22的引导轴22a、22a插通第一个分隔件12的引导孔17、17,将第一个分隔件12载置于工件台座22的上表面。
接着,在第一个电极组件11的引导孔17、17中插通引导轴22a、22a,在第一个分隔件12的上部载置第一个电极组件11。之后,使引导轴22a、22a插通按压构件23的引导孔17、17,使按压构件23沿着引导轴22a、22a下降。然后,使用液压缸(未图示),利用按压构件23的外周部23A以及内周部23B向下方按压电极组件11。
具体而言,在将第一个电极组件11层叠于第一个分隔件12的上部的状态下,利用按压构件23从上方按压第一个电极组件11。具体而言,外周部23A以压力P1按压第一个电极组件11的外周部分,内周部23B以压力P2按压第一个电极组件11的中央部。由于按压构件23由平板状的板材形成,因此施加于第一个电极组件11的压力P1、P2均匀。压力P1、P2可以相同,但由于第一个电极组件11的中央部成为发电区域14,因此也可以将内周部23B的压力P2设定得小。
接着,通过按压构件23的外周部23A与内周部23B之间的槽部23a,从激光接合装置24照射激光R。在位于上部的第一个电极组件11中,照射了激光R的树脂框架11B的树脂熔融。当使XY工作台21以使激光接合装置24的激光R沿着槽部23a照射的方式进行移动时,电极组件11与第一个分隔件12接合,形成成为接合部的接合线18。
在第一个分隔件12与第一个电极组件11的接合中,在由按压构件23按压的状态下利用激光R使树脂框架11B的树脂熔融,因此接合线18的接合状态均匀。另外,由于第一个分隔件12和第一个电极组件11由引导轴22a、22a准确地定位,因此能够将它们高精度地接合。
当从工件台座22卸下按压构件23时,在工件台座22,在第一个分隔件12上配置有与其接合的第一个电极组件11。接着,如图9B所示,从工件台座22的上方向第一个电极组件11载置第二个分隔件12。具体而言,使工件台座22的引导轴22a、22a插通第二个分隔件12的引导孔17、17,将第二个分隔件12载置在第一个电极组件11上。
之后,使引导轴22a、22a插通按压构件23的引导孔17、17,在将第二个分隔件12载置在第一个电极组件11上的状态下,以压力P1、P2按压第二个分隔件12。然后,当沿着按压构件23的槽部23a照射激光R时,位于第二个分隔件12的下方的第一个电极组件11的树脂框架11B的树脂熔融。当以激光接合装置24的激光R沿着槽部23a照射的方式使XY工作台21移动时,第二个分隔件12与第一个电极组件11接合,形成接合线18。由此,位于上部的第二个分隔件12的接合也能够位置精度良好且均匀地进行。
这样,在制造了一个单电池10之后,重复进行相同的作业,在其上按分隔件12、电极组件11以及分隔件12的顺序逐个层叠并接合。即,对于第二个以后的电极组件11,也以最终夹入分隔件12、12的方式将这些构件逐个层叠,并且在按压层叠了的构件的状态下利用激光R进行接合。由此,能够制造燃料电池组1。需要说明的是,在不设置导电性组件16的情况下,即,在图3所示的构造的情况下,也可以是,在分隔件12彼此之间沿着接合线18配置密封件,该密封件也利用激光R熔敷在分隔件12上。
另一方面,在如图5所示那样设置有导电性组件16的情况下,如图10A所示,在第二个分隔件12的上部载置第一个导电性组件16。之后,将引导轴22a、22a插通于按压构件23的引导孔17、17,使按压构件2沿着引导轴22a、22a下降。然后,利用液压缸等,用按压构件23的外周部23A以及内周部23B向下方按压第一个导电性组件16。
接着,在位于最上层的导电性组件16由按压构件23均匀地按压的状态下,沿着按压构件23的槽部23a照射激光R。由此,导电性组件16的树脂框架16B的树脂熔融,导电性组件16与第二个分隔件12接合。
接着,如图10B所示,在图10A所示的工序中位于最上层的导电性组件16上进一步接合第三个分隔件12。该第三个分隔件12是成为下一个层叠的单电池10的一部分的分隔件12。
具体而言,将第三个分隔件12同样地配置在导电性组件16的上部,用按压构件23均匀地按压第三个分隔件12。在该状态下,沿着按压构件23的槽部23a照射激光R,经由第三个分隔件12使导电性组件16的树脂框架16B的树脂熔融。由此,将第三个分隔件12与导电性组件16接合。通过反复进行这样的一系列的作业,能够制造燃料电池组1。
如上所述,在本实施方式的燃料电池组1的制造方法中,将分隔件12、电极组件11逐个地依次层叠,在各层叠时,在逐个均匀地按压的状态下沿着形成于按压构件23的槽部23a照射激光R。由此,能够将这些构件彼此逐个均匀且高精度地接合。而且,能够层叠电极组件11和分隔件12而制造单电池10,并且也能够一并制造燃料电池组1,因此能够高效地制造燃料电池组1。
而且,在本实施方式中,通过按压构件23,在接合时分隔件12等受到约束,因此能够抑制因由激光R输入的热而在分隔件12等产生翘曲等的情形。
另外,在构成单电池10的分隔件12进一步层叠成为下一个单电池10的分隔件12时,如图10A及图10B所示,若经由导电性组件16接合这些分隔件12,则也能够期待以下的效果。具体而言,由于导电性组件16具有导电性构件16A,因此能够将配置于两侧的单电池10的分隔件12、12彼此导通。另外,通过使导电性组件16的树脂框架16B使用与电极组件11的树脂框架11B相同形状的树脂框架,能够削减部件件数,从而更廉价地制造燃料电池组1。
以上,对本发明的一实施方式进行了详细叙述,但本发明并不限定于所述实施方式,在不脱离请求保护的范围所记载的本发明的精神的范围内,能够进行各种设计变更。
例如,在制造装置20中,示出了使用XY工作台使工件台座22精密移动并利用激光R进行接合的例子,但也可以不使用XY工作台而使激光接合装置24沿着按压构件23的槽部23a移动来进行接合。
标号说明
1:燃料电池组、10:单电池、11:电极组件、11A:膜电极接合体、11B:树脂框架、11a:高分子电解质膜、11d:气体扩散层、12:分隔件、14:发电区域、15a:第一开口部、15b:第二开口部、15c:第三开口部、16:导电性组件、16A:导电性构件、16B:树脂框架、17:引导孔、18:接合线(接合部)、20:制造装置、21:XY工作台、22:工件台座、22a:引导轴、23:按压构件、23A:外周部、23B:内周部、24:激光接合装置、R:激光。
Claims (2)
1.一种燃料电池组的制造方法,该燃料电池组呈将以一对分隔件夹持电极组件而成的单电池多个层叠的构造,所述电极组件具备在两面层叠有气体扩散层的膜电极接合体和以环绕所述膜电极接合体的外周的方式固定于所述膜电极接合体的树脂框架,所述燃料电池组的制造方法的特征在于,
所述制造方法是反复根据所述燃料电池组的层叠状态按所述分隔件、所述电极组件及所述分隔件的顺序进行层叠而制造所述燃料电池组的方法,
在将所述电极组件向所述分隔件层叠时,将所述电极组件以层叠于所述分隔件的状态进行按压,向所述电极组件照射激光,由此使所述树脂框架的树脂熔融而将所述电极组件接合于所述分隔件,
在将所述分隔件向所述电极组件层叠时,将所述分隔件以层叠于所述电极组件的状态进行按压,向所述分隔件照射激光,由此经由所述分隔件使所述树脂框架的树脂熔融而将所述分隔件接合于所述电极组件。
2.根据权利要求1所述的燃料电池组的制造方法,其特征在于,
所述制造方法具备如下工序:在将所述分隔件进一步向构成所述单电池的分隔件层叠时,在进行层叠的所述分隔件与构成所述单电池的分隔件之间经由导电性组件将所述分隔件与构成所述单电池的分隔件接合,
所述导电性组件具备导电性构件和以环绕所述导电性构件的外周的方式固定于所述导电性构件的树脂框架,
在将所述分隔件与构成所述单电池的分隔件接合时,将所述导电性组件以层叠于构成所述单电池的分隔件的状态进行按压,向所述导电性组件的树脂框架照射激光,由此将所述导电性组件的所述树脂框架接合于构成所述单电池的分隔件,
在将所述分隔件向所述导电性组件接合时,将所述分隔件以层叠于所述导电性组件的状态进行按压,向所述分隔件照射激光,由此将所述分隔件接合于所述导电性组件的所述树脂框架。
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