九、發明說明： 【發明所屬之技術領域】 本發明係關於一種燃料電池，尤指一種適用於以扣合 元件組裝之燃料電池及其組裝方法。 【先前技術】 傳統的燃料電池是由膜電極組、流場板、集電板、以 及端板所組成，膜電極組、流場板和集電板彼此穿插組設， 在端板的四周開設有有多個螺孔，以端板搭配螺栓以夾持 方式來固定燃料電池，利用整個平面在端板四周以螺栓給 予一定的扭矩，以平均的壓力施加於集電板和流場板。 然而相關習知技術為了避免人工依序堆疊再分別鎖合 螺栓，造成不平均之壓力，進而造成疊層移位，導致各疊 層間之氣密效果不佳、及夾持壓力不平均的缺陷，係藉以 組裝壓床1 〇組裝燃料電池組i 〇〇。由圖丨甲可發現，習知組 裝壓床10之壓塊26，藉由直立壓缸20上下滑移，可自動平 均壓合置放於承載座24上之燃料電池1之各疊層，再以人工 分別鎖合螺栓，減少各疊層間之氣密效果不佳、或疊層移 位。但由於以人工螺合時逐一施加固定的扭矩並不容易精 準的掌控，加上容易造成工時的延長，因此使用此固定方 式容易因為壓力施加不平均，還可能造成燃料電池内部氣 體擴散層内壓縮率不平均，容易使燃料電池產生過大的内 部電流阻抗’使得燃料電池的工作效能降低。另外，以螺 检失持的方式尚須考量螺帽與墊片的大小，以在端板上預 留一定的面積，將增加燃料電池的體積及重量。因此上述 的螺栓夹持的方式在燃料電池的應用並非十分理想。 【發明内容】 本發明之燃料電池是包括有至少一膜電極組、至少二 流場板、二集電板、二端板、以及至少二扣合元件每一 端板包括有一内表面、及一外表面。在二端板之内表面之 間，夾設有至少一膜電極組、至少二流場板、以及二集電 板。本發明的特徵在於至少二扣合元件，其中每一扣合元 件包括有一凹槽、及二壓合面。前述二壓合面是分設於凹 槽之相對側面、並彼此相距一特定距離。而前述至少二扣 合元件疋分別對應扣合於二端板外側，促使二端板容設於 凹槽内’二端板之外表面並對應壓合於二壓合面上、並保 持特定距離。根據上述，本案是在燃料電池之兩端板扣合 有扣合元件，利用該扣合元件平均扣壓該兩端板，俾能使 燃料電池中氣體擴散層能有較平均的壓縮率，以發揮燃料 電池的工作效能’並縮短組裝工時，又能將燃料電池體積 縮小及重量減輕。 如上所述，本發明之燃料電池中，每一端板之外表面 是包括二相對邊，至少二扣合元件是分別地對應扣合在二 端板之二相對邊的外側。 如上所述’本發明之燃料電池中，每一端板之外表面 是包括二相對角，至少二扣合元件是分別地對應扣合於二 端板之二相對角的外側。 1325191 如上所述，本發明之燃料電池_，至少一膜電極組是 包括有二氣體擴散層，而每一氣體擴散層具有一特定壓縮 率，透過每一扣合元件之二壓合面彼此相距之特定距離， 俾能维持氣體擴散層之特定壓縮率在〇%〜2〇%之間。 5 另外，本發明之燃料電池之組裝方法是包括有提供一 組裝壓床及一燃料電池組，該組裝壓床包括有一壓缸、及 一承載座，該壓缸較佳地可為直立式壓缸，該壓缸之底端 • 設有一壓塊，其係對應於承載座、並相對承載座作趨近或 遠離的移動，該燃料電池組包括有二端板，其夹設有至少 10 —膜電極組、至少一流場板、以及二集電板；將燃料電池 組置於組裝壓床之承載座上；驅動該壓缸移動該壓塊以趨 近該承載座，促使該壓塊平均壓合置放於該承載座上之燃 料電池組；將至少二扣合元件分別對應扣合於燃料電池組 之二端板外側’其中，每一扣合元件包括有一凹槽、及二 15 壓合面’該二壓合面係分設於該凹槽之相對側面、並彼此 相距一特定距離；驅動該壓缸移動該壓塊以遠離該承載 座，促使該二端板容設於該凹槽内，該二端板之該外表面 並對應壓合於該二壓合面上、並保持該特定距離；最後， 取出燃料電池。藉由本發明之組裝方法，以組裝壓床提供 2〇 自動平均壓合置放於承載座上之燃料電池組之各疊層，利 用扣合元件平均壓合的效果，可進一步避免造成各疊層間 之壓力不平均的缺點，以達到提昇燃料電池組之效能。 【實施方式】 以下係藉由特定的具體實施例說明本發明之實施方 式，使該發明技術領域具通常知識者可由本說明書所揭示 之内容輕易地了解本發明之其他優點與功效。 有關本發明之燃料電池1，請參照圖2及圖3所示，燃料 電池組100主要是由一膜電極組2、二流場板3、二集電板4 以及二端板5所組成，膜電極組2主要提供燃料電池丨反應之 核心，流場板3主要提供反應氣體通道與電子的傳導；集電 板4主要提供導出電池所產生的電力，以供給外部負載使 用，另外，端板5主要提供夾持所有層疊與氣體進出口，穩 固燃料電池1。 圖2所示之本發明燃料電池丨之結構中，燃料電池組1〇〇 之二端板5内表面52之間夾設有膜電極組2、二流場板3、和 二集電板4，且膜電極組2、二流場板3、和二集電板4是彼 此穿插組設’而在端板5外表面51之四個相對邊 511,512,513,514分別扣有扣合元件6，透過四個扣合元件6 分別對應扣合於二端板5之四個相對邊511，512,513,514外 側，以快速組裝燃料電池1。 另外，由圖2中可發現每一扣合元件6是包括有一凹槽 61、及二壓合面62 ’其是分設於凹槽61之相對侧面、並彼 此相距一特定距離D。 然而燃料電池1在扣合上扣合元件6之前，還是需要先 以習知的組裝壓床10自動平均壓合燃料電池組1〇〇之各疊 層，再將每一扣合元件6分別地對應扣合在二端板5外側， 以使二端板5容設於扣合元件之凹槽61内，二端板5之外表 1325191 面51並對應壓合於二壓合面62上、並保持特定距離D。 燃料電池組100之膜電極組2是包括有二氣體擴散層 21，22’該氣體擴散層21具有一特定壓縮率。因此，本實施 例中每一扣合元件6之二壓合面62彼此相距之特定距離D是 5 用以維持該氣體擴散層21所需的1〇%〜20%之特定壓縮率 (本實施例較佳地為10%〜15%之特定壓縮率）。 再進一步參考圖3，可發現本發明燃料電池丨之扣合元 件6之寬度w是略小於燃料電池丨端板5之邊長，但是至少為 該端板5之邊長之一半以上。其實扣合元件6之寬度w也可以 1〇 跟燃料電池1端板5之邊長等長，即便將整個燃料電池1包腹 起來，這樣所造成的均壓效果也是很好。 接著’請參考圖4，該圖所示是本發明燃料電池丨之側 視圖。由圖4可知本實施例之扣合元件6的厚度d係為燃料電 池1端板5之厚度的一半。扣合元件6的結構強度是跟厚度^ 15 有直接的關係，但如果太厚將會增加整個燃料電池1的重 量，反之，則會因強度不夠而使得扣合元件6變形，影響燃 料電池1的工作效率。因此本實施例係以端板5之厚度的一 半作為扣合元件6的厚度d，可使該結構兼具強度及輕量化 的優點。 2〇 综上所述，本發明是在燃料電池1之二端板5扣合有扣 合件6 ’利用該扣合件6平均扣壓兩端板5，俾能使燃料電池 1中氣體擴散層21能有較平均的壓縮率，以發揮燃料電池J 的工作效能’並縮短組裝工時，又能將燃料電池1體積縮小 及重量減輕。 9 1325191 另外，請參考圖5’其係為本發明之另一較佳實施例之 立體圖，由圖中可發現本實施例唯一與較佳實施例不同之 處，係是將四個扣合元件7分別對應扣合於燃料電池丨二端 板8之四個相對角815,816,817,818外側，其亦能達到本發明 5 的主要目的β 最後，請參考圖6,其係為本發明之又一較佳實施例之 流程圖。圖6顯示此組裝方法之詳細流程，其中，組裝壓床 10可參考習知圖1 ’其構造與習知相同而不再詳述，而燃料 電池1可參考圖2。 10 本發明之燃料電池之組裝方法包括： 步驟（Α)，提供一組裝壓床10及一燃料電池組1〇〇，該 組裝壓床10疋包括有承載座24、及直立壓缸2〇，該承載座 24是可置放承載物，該直立壓缸2〇底端設有一壓塊％，該 壓塊26係對應承載座24上下滑移、以平均施壓於承載物 15 上’該燃料電池組包括有二端板5，每一端板5之外表面 51係包括四個相對邊511，512,513,514，該二端板5夾設有一 膜電極組2、一流場板3、以及二集電板4，其中膜電極組2、 一流％板3、和二集電板4是彼此穿插組設在燃料電池組丨〇〇 的兩端板5内。前述之膜電極組2是包括有二氣體擴散層 2〇 21，22’每一氣體擴散層21具有一特定壓縮率。 步驟（Β) ’將燃料電池組100置放於組裝壓床1〇之承載 座24上。 步驟（C) ’驅動組裝壓床10之直立壓缸2〇向下滑移壓塊 26,以平均壓合置放於承載座24上之燃料電池組1〇〇。 10 步驟（D) ’將四扣合元件6分別對應扣合於燃料電池組 100之二端板5之四個相對邊511，512,513,514外側，而每一 扣合元件6是包括有一凹槽61、及二壓合面62,該二壓合面 62是分設於凹槽61之相對側面、並彼此相距一特定距離d， 其可用以維持每一氣體擴散層21所需的10%〜20%之特定壓 縮率（本實施例較佳地為10%〜15%之特定壓缩率）。其中， 扣合的動作是以人工作扣合元件6的扣合。 步驟（E)’驅動組裝壓床1〇之直立壓缸2〇向上滑移壓塊 26’促使二端板5容設於扣合元件6之凹槽61内，二端板5之 外表面51並對應壓合於二壓合面62上、並保持特定距離〇。 步驟（F)，取出燃料電池1，其中是以人工將組裝完成 的燃料電池1取出。 因此’藉由本發明之組裝方法，以組裝壓床丨〇提供自 動平均壓合置放於承載座24上之燃料電池組1〇〇之各疊 層，利用扣合元件6平均壓合的效果，可進一步避免造成各 疊層間之壓力不平均的缺點，以達到提昇燃料電池1之效 能。 另外，請一併參考圖5。本發明燃料電池之組裝方法之 再一較佳實施例，係與又一實施例相類似，惟與又一實施 例不同之處，係是將四個扣合元件7分別對應扣合於燃料電 池組100之二端板8之四個相對角815,816,817,818外側，其 亦能達到提昇燃料電池1之效能的目的。 上述實施例僅係為了方便說明而舉例而已。然而在不 悖離本發明之精神下，該發明所屬技術領域具通常知識者 可由本說明書所揭示之内容輕易地瞭解，進行各種修飾與 變更。本發明所主張之權利範圍自應以申請專利範圍所述 為準，而非僅限於上述實施例。 【圖式簡單說明】 圖1係習知組裝壓床之立體圖。 圖2係本發明一較佳實施例之燃料電池分解圖。 圖3係本發明一較佳實施例之燃料電池立體圖。 圖4係本發明一較佳實施例之燃料電池側視圖。 圖5係本發明另一較佳實施例之燃料電池立體圖。 圖6係本發明又一較佳實施例之流程圖。 1325191 【主要元件符號說明】 1 燃料電池 21,22 氣體擴散層 2 膜電極組 511,512,513,514 相對邊 3 流場板 815,816,817,818 相對角 4 集電板 D 特定距離 5,8 端板 6,7 扣合元件 51 外表面 10 組裝壓床 52 内表面 20 直立壓缸 61 凹槽 24 承載座 62 壓合面 26 壓塊 100 燃料電池組 d 厚度 W 寬度 13IX. INSTRUCTIONS OF THE INVENTION: TECHNICAL FIELD The present invention relates to a fuel cell, and more particularly to a fuel cell suitable for assembly with a snap-fit component and an assembly method thereof. [Prior Art] A conventional fuel cell is composed of a membrane electrode assembly, a flow field plate, a collector plate, and an end plate. The membrane electrode group, the flow field plate, and the current collector plate are interspersed with each other, and are opened around the end plate. There are a plurality of screw holes, and the fuel cell is fixed by clamping the end plate with bolts. The entire plane is bolted to a certain torque around the end plate, and the average pressure is applied to the collector plate and the flow field plate. However, in order to avoid manual stacking and then separately locking the bolts, the conventional prior art causes uneven pressure, which in turn causes the stack to be displaced, resulting in poor airtightness between the laminates and defects in uneven clamping pressure. By assembling the press 1 to assemble the fuel cell stack i 〇〇. It can be seen from the figure that the pressure block 26 of the assembly press 10 can be automatically pressed by the vertical pressure cylinder 20 to automatically laminate the stacks of the fuel cells 1 placed on the carrier 24, and then The bolts are individually locked by hand to reduce the airtight effect between the laminations or the stack displacement. However, since the fixed torque is applied one by one in the manual screwing, it is not easy to control accurately, and it is easy to cause the extension of working hours. Therefore, the fixing method is easy to apply due to uneven pressure application, and may also cause gas diffusion inside the fuel cell. The compression rate is not uniform, and it is easy for the fuel cell to generate an excessive internal current impedance' to make the fuel cell work efficiency lower. In addition, the size of the nut and the gasket must be considered in the manner of screwing off to maintain a certain area on the end plate, which will increase the volume and weight of the fuel cell. Therefore, the above-mentioned method of bolt clamping is not very satisfactory in the application of a fuel cell. SUMMARY OF THE INVENTION The fuel cell of the present invention includes at least one membrane electrode assembly, at least two flow field plates, two current collector plates, two end plates, and at least two fastening members. Each end plate includes an inner surface and an outer surface. surface. Between the inner surfaces of the two end plates, at least one membrane electrode group, at least two flow field plates, and two current collector plates are sandwiched. The invention features at least two snap elements, wherein each snap element includes a recess and a second press fit surface. The two pressing faces are disposed on opposite sides of the groove and at a specific distance from each other. The at least two fastening components are respectively fastened to the outside of the two end plates, so that the two end plates are accommodated in the outer surface of the two end plates in the groove and correspondingly pressed on the two pressing surfaces and maintained at a specific distance. . According to the above, in the present case, the fastening members are fastened and buckled at the two ends of the fuel cell, and the two end plates are buckled by the fastening elements, so that the gas diffusion layer in the fuel cell can have a relatively average compression ratio to exert The fuel cell's performance is 'and the assembly time is reduced, and the fuel cell is reduced in size and weight. As described above, in the fuel cell of the present invention, the outer surface of each end plate includes two opposite sides, and at least two fastening members are respectively respectively coupled to the outer sides of the opposite sides of the two end plates. As described above, in the fuel cell of the present invention, the outer surface of each end plate includes two opposite angles, and at least two fastening members are respectively respectively coupled to the outer sides of the opposite corners of the two end plates. 1325191 As described above, the fuel cell of the present invention has at least one membrane electrode group including two gas diffusion layers, and each gas diffusion layer has a specific compression ratio, which is separated from each other by the two pressing surfaces of each fastening element. At a certain distance, the specific compression ratio of the gas diffusion layer can be maintained between 〇% and 2%. In addition, the assembly method of the fuel cell of the present invention includes providing an assembly press and a fuel cell stack, the assembly press including a press cylinder and a carrier, the press cylinder preferably being an upright press a cylinder, the bottom end of the cylinder is provided with a pressing block corresponding to the bearing seat and moving toward or away from the bearing seat, the fuel cell stack includes two end plates, and the clamping portion is provided with at least 10 a membrane electrode assembly, at least a first-class field plate, and two current collector plates; placing the fuel cell stack on a carrier of the assembly press; driving the pressure cylinder to move the pressure block to approach the carrier to promote the average pressure of the pressure block And a fuel cell stack disposed on the carrier; the at least two fastening components are respectively corresponding to the outer side of the two end plates of the fuel cell stack, wherein each fastening component includes a groove, and two 15 presses The two pressing surfaces are disposed on opposite sides of the groove and spaced apart from each other by a specific distance; driving the pressure cylinder to move the pressing block away from the bearing seat, so that the two end plates are accommodated in the groove Inside, the outer surface of the two end plates corresponds to Pressing on the two pressing surfaces and maintaining the specific distance; finally, taking out the fuel cell. According to the assembly method of the present invention, the assembly press is provided with two layers of the automatic average pressure-bonding of the fuel cell stacks placed on the carrier, and the effect of the average pressing of the fastening elements can further avoid the formation of the laminates. The disadvantage of uneven pressure is to improve the performance of the fuel cell stack. [Embodiment] The embodiments of the present invention are described by way of specific embodiments, and those skilled in the art can readily understand the other advantages and advantages of the present invention. Referring to FIG. 2 and FIG. 3, the fuel cell stack 100 is mainly composed of a membrane electrode assembly 2, a two-flow field plate 3, two collector plates 4, and two end plates 5. Membrane electrode group 2 mainly provides the core of fuel cell 丨 reaction, flow field plate 3 mainly provides reaction gas channel and electron conduction; collector plate 4 mainly provides power generated by deriving battery to supply external load, in addition, end plate 5 mainly provides clamping of all stacks and gas inlets and outlets to stabilize the fuel cell 1. In the structure of the fuel cell cartridge of the present invention shown in FIG. 2, a membrane electrode group 2, a two-flow field plate 3, and two collector plates 4 are interposed between the inner surfaces 52 of the two end plates 5 of the fuel cell stack 1 And the membrane electrode group 2, the second flow field plate 3, and the two current collector plates 4 are interspersed with each other', and the four opposite sides 511, 512, 513, 514 of the outer surface 51 of the end plate 5 are respectively fastened with the fastening elements 6, through four The fastening elements 6 are respectively fastened to the outside of the four opposite sides 511, 512, 513, 514 of the two end plates 5 for quick assembly of the fuel cell 1. Further, it can be seen from Fig. 2 that each of the fastening members 6 includes a groove 61 and two pressing faces 62' which are disposed on opposite sides of the groove 61 and are spaced apart from each other by a specific distance D. However, before the snap-on element 6 is fastened, the fuel cell 1 needs to be automatically and evenly laminated to each stack of the fuel cell stack 1 by a conventional assembly press 10, and each of the fastening elements 6 is separately Correspondingly, the two end plates 5 are respectively received on the outer side of the two end plates 5, so that the two end plates 5 are received in the recesses 61 of the engaging elements, and the two end plates 5 are respectively surfaced and joined to the second pressing surface 62, and Maintain a certain distance D. The membrane electrode assembly 2 of the fuel cell stack 100 includes a gas diffusion layer 21, 22' which has a specific compression ratio. Therefore, in the present embodiment, the specific pressing distance D of each of the two pressing surfaces 62 of each fastening component 6 is 5 to maintain a specific compression ratio of 1% to 20% required for the gas diffusion layer 21 (this embodiment) The example is preferably a specific compression ratio of 10% to 15%). Referring further to Figure 3, it can be seen that the width w of the snap element 6 of the fuel cell stack of the present invention is slightly less than the side length of the fuel cell top end plate 5, but at least one-half the length of the side of the end plate 5. In fact, the width w of the fastening member 6 can also be the same length as the side of the end plate 5 of the fuel cell 1, and even if the entire fuel cell 1 is ablated, the pressure equalization effect is good. Next, please refer to Fig. 4, which is a side view of the fuel cell cartridge of the present invention. As is apparent from Fig. 4, the thickness d of the fastening member 6 of the present embodiment is half the thickness of the end plate 5 of the fuel cell 1. The structural strength of the fastening component 6 is directly related to the thickness ^15, but if it is too thick, the weight of the entire fuel cell 1 will be increased, and conversely, the fastening component 6 will be deformed due to insufficient strength, affecting the fuel cell 1 Work efficiency. Therefore, in this embodiment, half of the thickness of the end plate 5 is used as the thickness d of the fastening member 6, so that the structure has the advantages of strength and weight reduction. 2 In summary, the present invention is that the two end plates 5 of the fuel cell 1 are fastened with a fastening member 6'. The fastening member 6 is used to averagely press the two end plates 5 to enable the gas diffusion layer in the fuel cell 1. 21 can have a relatively average compression ratio to play the fuel cell J's work efficiency 'and shorten the assembly man-hours, and can reduce the size and weight of the fuel cell 1 . 9 1325191 In addition, please refer to FIG. 5 ' which is a perspective view of another preferred embodiment of the present invention. It can be seen from the figure that the only difference between the embodiment and the preferred embodiment is that four fastening elements are used. 7 corresponding to the four opposite angles 815, 816, 817, 818 of the fuel cell rear end plate 8, respectively, which can also achieve the main purpose of the present invention 5 Finally, please refer to FIG. 6, which is another preferred embodiment of the present invention. Flow chart of the example. Fig. 6 shows a detailed flow of this assembly method, in which the assembly press 10 can be referred to the conventional Fig. 1', the configuration of which is the same as the conventional one and will not be described in detail, and the fuel cell 1 can be referred to Fig. 2. 10 The assembly method of the fuel cell of the present invention comprises: Step (Α), providing an assembly press 10 and a fuel cell stack 1疋, the assembly press 10疋 includes a carrier 24 and an upright cylinder 2〇, The carrier 24 is a detachable carrier, and the bottom end of the vertical cylinder 2 is provided with a pressure block %, and the pressure block 26 is correspondingly pressed down on the carrier 24 to apply pressure on the carrier 15 on average. The battery pack includes two end plates 5, and the outer surface 51 of each end plate 5 includes four opposite sides 511, 512, 513, 514. The two end plates 5 are provided with a membrane electrode group 2, a first-class field plate 3, and two collector plates. 4. The membrane electrode group 2, the first-order % plate 3, and the second collector plate 4 are interposed in each other at the end plates 5 of the fuel cell stack. The foregoing membrane electrode assembly 2 includes two gas diffusion layers 2, 21, 22' each of which has a specific compression ratio. Step (Β) ' The fuel cell stack 100 is placed on the carrier 24 of the assembly press 1 . The step (C) 'drives the upright cylinder 2 of the assembly press 10 to slide the block 26 downward to uniformly press the fuel cell stack 1 placed on the carrier 24. 10 Step (D) 'The four fastening elements 6 are respectively respectively fastened to the outside of the four opposite sides 511, 512, 513, 514 of the two end plates 5 of the fuel cell stack 100, and each fastening element 6 includes a groove 61, And a second pressing surface 62, which is disposed on opposite sides of the groove 61 and at a specific distance d from each other, which can be used to maintain 10% to 20% of each gas diffusion layer 21 required. The specific compression ratio (this embodiment is preferably a specific compression ratio of 10% to 15%). Among them, the snapping action is the snapping of the human work fastening component 6. Step (E) 'Drive the assembly press 1 直 upright cylinder 2 〇 upwardly slide the block 26 ′ to urge the two end plates 5 to be received in the recess 61 of the fastening element 6 , the outer surface 51 of the two end plates 5 And correspondingly pressed on the second pressing surface 62, and maintained a certain distance 〇. In the step (F), the fuel cell 1 is taken out, in which the assembled fuel cell 1 is manually taken out. Therefore, by the assembly method of the present invention, the assembly press 丨〇 provides the average grading of the respective stacks of the fuel cell stacks 1 placed on the carrier 24, and the effect of the average pressing of the fastening elements 6 is utilized. The disadvantage of causing uneven pressure between the laminations can be further avoided to improve the performance of the fuel cell 1. In addition, please refer to Figure 5 together. A further preferred embodiment of the assembly method of the fuel cell of the present invention is similar to the other embodiment, except that it is different from the other embodiment in that the four fastening elements 7 are respectively correspondingly coupled to the fuel cell. The four opposite ends 815, 816, 817, 818 of the two end plates 8 of the group 100 can also achieve the purpose of improving the performance of the fuel cell 1. The above embodiments are merely examples for convenience of explanation. However, various modifications and changes can be made by those skilled in the art without departing from the scope of the invention. The scope of the claims is intended to be limited only by the scope of the claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a conventional assembled press. 2 is an exploded view of a fuel cell in accordance with a preferred embodiment of the present invention. 3 is a perspective view of a fuel cell in accordance with a preferred embodiment of the present invention. 4 is a side view of a fuel cell in accordance with a preferred embodiment of the present invention. Figure 5 is a perspective view of a fuel cell in accordance with another preferred embodiment of the present invention. Figure 6 is a flow chart of still another preferred embodiment of the present invention. 1325191 [Explanation of main components] 1 Fuel cell 21, 22 Gas diffusion layer 2 Membrane electrode group 511, 512, 513, 514 Opposite side 3 Flow field plate 815, 816, 817, 818 Relative angle 4 Collector plate D Specific distance 5, 8 End plate 6, 7 Outside the snap element 51 Surface 10 Assembly press 52 Inner surface 20 Upright cylinder 61 Groove 24 Carrier 62 Compression surface 26 Compression block 100 Fuel cell stack d Thickness W Width 13