201251190 六、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模組。 【先前技術】 作為先前之燃料電池模組’已知有於專利文獻1所示之 燃料電池用殼體中收納改質器與電池堆而構成者。該燃料 電池用殼體包含：收納室，其收納改質器與電池堆；排氣 流路，其形成於收納室之外側；氧化劑流路，其形成於排 氣流路之外側；及氧化劑供給構件，其自上方之氧化劑流 路朝向收納室向下方延伸。排氣流路包含於收納室之側方 使自電池堆上端部之燃燒部產生之排氣向下方流通之部 分、及於收納室之下方收集排氣並排出至系外之部分。 又’氧化劑供給構件係以進入至水平方向上沿與電池之積 層方向正交之方向排列之電池堆間之間隙之方式配置，且 於前端部具有貫通孔，以便自該間隙對各電池堆供給氧化 劑。 先前技術文獻 專利文獻 [專利文獻1]曰本專利特開2010-044990號公報 【發明内容】 發明所欲解決之問題 此處’先前之燃料電池模組之殼體係於藉由焊接等組裝 複數個壁部而構成本體部後，由蓋體覆蓋形成於本體部之 開口部而固定。該種殼體係於本體部之開口部周圍形成有 163757.doc 201251190 支承蓋體之蓋體支承部，且於該蓋體支承部與蓋體之間配 置有密=構件。藉由螺栓及螺帽之緊固而將蓋體固定於蓋 P藉由夾入密封構件而確保蓋體與本體部之間的 氣密性。蓋體係藉由在整體形成平板狀之單純平板中形成 用以緊固螺栓之貫通孔而構成。 然而’於先前之燃料電池模組中，成為藉由使密封構件 與蓋體之周緣部及蓋體支承部面接觸而賦予擠壓力之構 以。於該種構造中，由於成為如藉由螺栓及螺帽之緊固而 產生之擠壓力分散於整個接觸面般之面密封構造，故而存 在難以確保殼體之氣密性之問題。進而，於該構造中，為 破保密封構件之接觸面積，而必需使用寬度較寬之密封構 件’藉此’存在成本增加之問題。 本發明係為解決該種問題而完成者，其目的在於提供一 種可抑制成本並且可確實地確保殼體之氣密性之燃料電池 模組。 解決問題之技術手段 本發明之燃料電池模組之特徵在於··其包含收納使用含 氮之燃料及氧化劑進行發電之電池堆之殼體，且殼體包 含：本體部，其收納電池堆，並且具有開口部；及蓋體， 其覆蓋本體部之開口部；本體部包含蓋體支承部，該蓋體 支承部自蓋體之厚度方向觀看時遍及整周地包圍開口部， 並且與蓋體之周緣部對向，且於蓋體與蓋體支承部之間配 置有自厚度方向觀看時遍及整周地包圍開口部之密封構 件’蓋體及蓋體支承部中之至少一者具有第1凸部，該第i 163757.doc 201251190 凸p向密封構件側突出，並且以自厚度方向觀看時遍及整 周地包圍上述開口部之方式延伸。 根據該燃料電池模組，又’於蓋體與蓋體支承部之間配 置有自厚度方向觀看時遍及整周地包圍開口部之密封構 件進而，i體或蓋體支承部具有第【凸部該第】凸部向 密封構件側突出，並^自厚度方向觀看時遍及整周地包 ](5之方式延伸。藉由該種構造，於將蓋體固定於蓋 體支承部時產生之擠壓力集中於p凸部。第ι凸部以遍及 整周地包圍開口部之方式延伸，&而可包圍開口部之整周 而將松封構件擠壓成線狀。藉由該種線密封構造，可確實 地確保殼體之氣密性。χ ’根據該種線密封構造，僅於第 1凸部附近擠壓力集t之部分配置密封構件即可，而可減 少密封材料之搭載量，從而可降低成本。藉此，可抑制成 本並且可確實地確保殼體之氣密性。 發明之效果 根據本發明，可抑制成本並且可確實地確保殼體之氣密 性。 【實施方式】 以下，參照圖式對本發明之較佳實施形態進行詳細說 明。再者，對各圖中相同或相當之部分附加相同之符號， 並省略重複說明。 如圖1及圖2所示，燃料電池模組丨包含：改質器2，其使 用3氫之燃料產生改質氣體RG(Re formed Gas);電池堆 3，其使用改質氣體RG及氧化劑〇x(〇xidizer)進行發電； 163757.doc 201251190 二=M，其藉由使水氣化而生成供給至改 =:6,其收納改_、電池堆3、及水氣化部： 於圖1及圖2中雖去.. τ雖未圖不，但於燃料電池模組丨之下 收納泵等辅助設備或控制機器等之殼體。 3 作為含氫之燃料’例如使用烴系燃料。作為烴系揪料， 2用於分子中含有碳與氫之化合物（亦可含有氧等其他元 素）或者其等之混合物。作為烴系燃料，例如可列舉煙. 醇類越類、生物燃料，該等烴系燃料可適當使用先 前之來自石油、石炭等化石燃料者、來自合成氣體等合成 系燃料者來自生質者。具體而言’作為烴類，可列舉甲 烧、乙烧、丙烧、丁院、天然氣、LPG(Liquefied petr〇i_201251190 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a fuel cell module. [Prior Art] A conventional fuel cell module is known in which a reformer and a battery stack are housed in a fuel cell casing disclosed in Patent Document 1. The fuel cell casing includes a storage chamber that houses a reformer and a battery stack, an exhaust flow path that is formed outside the storage chamber, an oxidant flow path that is formed outside the exhaust flow path, and an oxidant supply. The member extends downward from the upper oxidant flow path toward the storage chamber. The exhaust gas flow path is included in the side of the storage chamber. The exhaust gas generated from the combustion portion at the upper end portion of the battery stack flows downward, and the exhaust gas is collected and discharged to the outside of the storage chamber. Further, the 'oxidant supply member is disposed so as to enter a gap between the stacks arranged in the horizontal direction in a direction orthogonal to the stacking direction of the battery, and has a through hole at the front end portion to supply the respective battery stacks from the gap. Oxidizer. PRIOR ART DOCUMENT PATENT DOCUMENT [PATENT DOCUMENT 1] PCT Patent Publication No. 2010-044990 SUMMARY OF INVENTION Technical Problem Here, the case of the prior fuel cell module is assembled by welding or the like. After the wall portion constitutes the main body portion, the lid body is covered by the opening formed in the main body portion and fixed. In this type of casing, a cover supporting portion for supporting the cover is formed around the opening of the main body portion, and a dense member is disposed between the cover supporting portion and the cover. The lid body is fixed to the lid P by fastening the bolt and the nut, and the airtightness between the lid body and the body portion is ensured by sandwiching the sealing member. The cap system is constructed by forming a through hole for fastening a bolt in a simple flat plate having a flat plate shape as a whole. However, in the conventional fuel cell module, the sealing member is brought into contact with the peripheral edge portion of the lid body and the lid support portion to provide a pressing force. In such a structure, since the pressing force generated by the fastening of the bolt and the nut is dispersed over the entire surface of the contact surface, there is a problem that it is difficult to ensure the airtightness of the casing. Further, in this configuration, in order to break the contact area of the sealing member, it is necessary to use a sealing member having a wide width, whereby there is a problem that the cost increases. The present invention has been made to solve such a problem, and an object thereof is to provide a fuel cell module which can suppress cost and can surely ensure airtightness of a casing. Means for Solving the Problems The fuel cell module of the present invention is characterized in that it comprises a casing for accommodating a battery stack that generates electricity using a nitrogen-containing fuel and an oxidant, and the casing includes: a body portion that houses the battery stack, and An opening; and a cover covering the opening of the main body; the main body portion includes a cover supporting portion that surrounds the opening over the entire circumference when viewed from a thickness direction of the cover, and is adjacent to the cover The peripheral portion is opposed to each other, and at least one of the sealing member 'the lid body and the lid body supporting portion that surrounds the opening portion over the entire circumference when viewed from the thickness direction is disposed between the lid body and the lid body supporting portion, and has at least one of the first convex portion In the second aspect, the convex p protrudes toward the sealing member side, and extends so as to surround the opening portion over the entire circumference when viewed in the thickness direction. According to the fuel cell module, a sealing member that surrounds the opening portion over the entire circumference when viewed from the thickness direction is disposed between the lid body and the lid body supporting portion, and the i body or the lid body supporting portion has the [protrusion portion] The first convex portion protrudes toward the sealing member side, and is extended over the entire circumference when viewed in the thickness direction. (5 is extended in such a manner that the cover is fixed to the cover supporting portion when the cover is fixed. The pressure is concentrated on the p-convex portion, and the first ridge portion extends so as to surround the opening portion over the entire circumference, and the loosening member can be extruded into a line shape by surrounding the entire circumference of the opening portion. The sealing structure can ensure the airtightness of the casing. χ ' According to the wire sealing structure, the sealing member can be disposed only in the portion of the pressing force set t near the first convex portion, and the sealing material can be reduced. In this way, the cost can be reduced, and the airtightness of the casing can be surely ensured. According to the present invention, the cost can be suppressed and the airtightness of the casing can be surely ensured. 】 Below, refer to the figure for the hair The same reference numerals are given to the same or corresponding parts in the drawings, and the repeated description is omitted. As shown in FIGS. 1 and 2, the fuel cell module 丨 includes: a reformer 2, which uses a fuel of 3 hydrogen to produce a reformed gas RG (ReFormed Gas); a stack 3, which uses a modified gas RG and an oxidant 〇x (〇xidizer) for power generation; 163757.doc 201251190 2=M, which borrows When the water is vaporized, the supply is changed to:=6, and the storage is changed to _, the battery stack 3, and the water vaporization unit: Although it is not shown in Fig. 1 and Fig. 2, the τ is not shown, but is in the fuel cell. Under the module, the auxiliary equipment such as a pump or a casing for controlling the machine is housed. 3 As a hydrogen-containing fuel, for example, a hydrocarbon-based fuel is used. As a hydrocarbon-based feedstock, 2 is used as a compound containing carbon and hydrogen in the molecule (also Other elements such as oxygen may be contained, or a mixture thereof, etc. Examples of the hydrocarbon-based fuel include smoke. Alcohols and biofuels, and those of the above-mentioned hydrocarbon-based fuels can be suitably used from fossil fuels such as petroleum and charcoal. Synthetic fuels such as synthetic gases come from biomass producers. Specifically 'Examples of the hydrocarbons include burning A, B burn, burn propoxy, butoxy hospital, natural gas, LPG (Liquefied petr〇i_
Gas，液化石油氣）、都市煤氣、城鎮煤氣、汽油、石腦 油、煤油、柴油。作為醇類，可列舉甲醇、乙醇。作為醚 類’可列舉二甲醚。作為生物燃料，可列舉生物氣體、生 物乙醇、生物柴油、生物喷氣。 作為氧化劑’例如使用空氣、純氧氣（亦可含有利用通 常之去除方法難以去除之雜質）、富氧空氣。 改質器2使用供給之含氫之燃料產生改質氣體奶。改質 器2藉由使用改f觸媒之改質反應而將含氫之燃料改質從 而產生改質氣體RG。改質器2之改質方式並無特別限定， 例如可採用水蒸氣改質器、部分氧化改質、自熱改質其 他改質方式。改質器2配置於電池堆3之上側，以便可藉由 下述燃燒熱而加熱β即，導入至電池堆3之燃料極側之改 質氣體RG之廢氣（off gas)(未反應改質氣體）與導入至空氣 163757.doc 201251190 極等氧化劑極側之空氣等氧化劑中之未反應氧氣（未反應 氧化劑氣體）一併燃燒，改質器2藉由該燃燒熱而加熱。改 質器2將改質氣體RG供給至電池堆3之燃料極。 電池堆3具有規則地排列並連結之稱為s〇FC(s〇nd 〇xide Fuel Cells，固態氧化物燃料電池）之複數個電池之積層 體。各電池係藉由將作為固體氧化物之電解質配置於燃料 極與氧化劑極之間而構成《«電解質例如包含紀安定氧化錯 (YSZ ’ Yttrium Stabilized Zirconia)等，且於高溫下傳導氧 化物離子。燃料極例如包含鎳與YS/之混合物，使氧化物 離子與改質氣體RG中之氫反應而產生電子及水。氧化劑 極例如包含猛酸鋼銘（Lanthanum Strontium Manganite)， 使氧化劑OX中之氧與電子反應而產生氧化物離子。電池 堆3係於基座7之上表面，以與設置包含該電池堆3之發電 單元之發電單元設置面平行且與各電池之積層方向之正交 方向相對之方式配置為兩行。但是，電池堆3亦可配置為 一行。於電池堆3配置為兩行之情形時，該兩個電池堆3構 成燃料電池模組1之發電單元。於電池堆3為一個之情形 時，該一個電池堆3構成燃料電池模組1之發電單元，於電 池堆3為三個以上之情形時，該三個以上之電池堆3構成燃 料電池模組1之發電單元。由於發電單元經由基座7而設置 於第1底壁部18，故而於本實施形態中，該第1底壁部丨8相 當於設置發電單元之發電單元設置面。再者，電池堆3只 要為將複數個電池連結而成者即可，電池之形狀並無特別 限定’亦可並不為可積層之形狀》於本實施形態中，以複 163757.doc 201251190 數個電池立設於基座7且朝向同一方向整齊排成一行而連 結之電池堆3為例進行說明。再者，此處，將複數個電池 立設於基座7且朝向同一方向整齊排成一行而延伸之方向 稱為「積層方向」而進行以下之說明。 基座7與改質器2利用管8而連接。自改質器2供給之改質 氣體RG經由基座7而供給至電池堆3之各電池。於電池堆3 未反應之改質氣體RG及氧化劑0X利用電池堆3之上部之燃 燒部9而燃燒。藉由燃燒部9中之廢氣之燃燒，而加熱改質 器2並且產生排氣EG(exhaust gas) β 水氣化部4藉由將供給之水加熱氣化而生成供給至改質 器2之水蒸氣。由水氣化部4生成之水蒸氣例如使用貫通第 1底壁部18將水氣化部4與改質器2連接之配管（未圖示）而供 給至改質器2。水氣化部4中之水之加熱例如亦可使用回收 改質器2之熱、燃燒部9之熱、或者排氣EG之熱等燃料電 池模組1内產生之熱。於本實施形態中，水氣化部4構成為 配置於底部之排氣流路，並回收排氣EG之熱。又，於改 質器2内產生之改質反應未伴隨水蒸氣改質反應之情形 時，可省略水氣化部4。 殼體6係包含用以收納改質器2、電池堆3、及水氣化部* 之内邛空間之長方體狀之金屬製箱體。殼體6包含：收納 室11，其收納電池堆3 ;排氣流路12 ’其形成於較收納室 11更靠外側，且使來自電池堆3之廢氣之燃燒所產生之排 氣EG流通；氧化劑流路13，其使氧化劑〇χ流通；及各壁 部，其形成收納室U或排氣流路12或氧化劑流㈣。再 163757.doc •10· 201251190 者’於以下之說明中，將沿電池堆3之各電池之積層方向 之方向設為殼體6之「長度方向D1」，將水平方向上與各電 池之積層方向正交之方向設為殼體6之「寬度方向D2」，將 錯垂方向設為殼體6之「上下方向D3」而進行以下之說 明。於本實施形態中，收納室丨丨、排氣流路12、氧化劑流 路13、及形成其專之各壁部成為自長度方向di觀看時左右 對稱之構造。 收納室11形成於沿宽度方向D 2相互對向之第1側壁部 16、17、及連結於第1側壁部16、17之各下端部之第丨底壁 部18之内側。於收納室π中’基座7配置於第1底壁部18。 再者’亦可於第1底壁部1 8與基座7之間配置絕熱材料。為 使燃燒部9中產生之排氣EG流通，而收納室11之上端部開 口 〇 排氣流路12藉由在寬度方向D2上分別配置於第1側壁部 16、17之外側之第2側壁部21、22、配置於較第丨側壁部 16、Π之上端部更靠上侧之第！上壁部23、及配置於較第i 底壁部1 8更靠下側之第2底壁部24而形成》 第1上壁部23連結於第2側壁部21、22之上端部，且第2 底壁部24連結於第2側壁部21、22之下端部。第2側壁部 21、22以與第1側壁部16、17隔開並對向之方式配置。第j 上壁部23以與收納室11之上端部隔開並對向之方式配置。 第2底壁部24以與第1底壁部18隔開並對向之方式配置。 排氣流路12包含：排氣流路12Α、12Β，其等形成於收 納室11之上侧之開口部與第1上壁部23之間；排氣流路 163757.doc 201251190 12C、12D，其等形成於第2側壁部21、22與第1侧壁部 16、17之間；及排氣流路12E、12F，其等形成於第2底壁 部24與第1底壁部18之間。排氣流路12八、12B將來自燃燒 部9之排氣EG導引至排氣流路12C、12D。排氣流路12(：、 12D使排氣EG向下方流通，並將該排氣EG之熱供給至流經 外側之氧化劑流路13C、13D之氧化劑〇χ。排氣流路 12E、12F使排氣EG朝向排氣管32沿水平方向流通，並將 該排氣EG之熱供給至水氣化部4。 氧化劑流路13藉由在寬度方向D2上分別配置於第2側壁 部21、22之外側之第3側壁部26、27、配置於較第1上壁部 23更靠上側之第2上壁部28、及配置於較第2底壁部24更靠 下側之第3底壁部29而形成。 第2上壁部28連結於第3側壁部26、27之上端部，且第3 底壁部29連結於第3側壁部26、27之下端部。第3側壁部 26、27以與第2側壁部21、22隔開並對向之方式配置。第2 上壁部28以與第1上壁部23隔開並對向之方式配置。第]底 壁部29以與第2底壁部24隔開並對向之方式配置。 於第1上壁部23之中央部形成有向長度方向⑴延伸之狹 縫39,於該狹縫39中插入有氧化劑供給構件％。氧化劑供 給構件36將氧化劑0X供給至電池堆3。心匕劑供給構件刊 以進入至一對電池堆3之間的間隙之方式延伸，且於内部 具有氧化劑流路13K，並且於前端部具有貫通孔37、π。 氧化劑流路13包含：氧化劑流路ΠΑ、ΐ3β，其等形成 於第2上壁部28與第i上壁部23之間；氧化劑流路η。、 163757.doc 12 201251190 13D ’其等形成於第3側壁部26、27與第2側壁部21、22之 間；及氧化劑流路13G、13H，其等形成於第3底壁部29與 第2底壁部24之間《氧化劑流路13G、13H使來自供氣管31 之氧化劑OX以沿水平方向擴展之方式流通，並導引至氧 化劑流路13C、13D。氧化劑流路13C、13D使氧化劑0X向 上方流通，並藉·由流經内側之排氣流路12C、12D之排氣 EG之熱將該氧化劑οχ加熱《氧化劑流路丨3a、丨3B使氧化 劑OX自寬度方向D2之外側向内側流通，並流入至氧化劑 供給構件36之氧化劑流路13K且導引至貫通孔37、38。 於第3底壁部29設置有用以使氧化劑自未圖示之氧化劑 供給部流入至氧化劑流路13之供氣管31。又，於第2底壁 部24設置有將來自排氣流路12之排氣排出之排氣管32。 側壁部16、17、21、22、26、27、上壁部23、28、及底 壁部18、24、29延伸至長度方向D1之殼體ό之端部6a、 6b。於殼體6之長度方向D1之兩端部分別設置有端壁部 33、34。第3側壁部26、27、第2上壁部28、第3底壁部 29、及端壁部33、34構成燃料電池模組！之外殼，確保相 互之連接部中之密封性，從而確保殼體6内之氣密性。 其次，對改質氣體RG、氧化劑〇χ、及排氣£(}之流動進 行說明。 使用自外部供給之含氫之燃料及來自水氣化部4之水蒸 氣並利用改質器2產生之改質氣體11(}通過管8而流入至基 座7，並自基座7供給至電池堆3之各電池。改質氣體尺〇自 下方朝向上方流經電池堆3, 一部分成為廢氣用於燃燒部9 I63757.doc 13 201251190 之燃燒。氧化劑ox自外部經由供氣管31供給，於氧化劑 流路13G、13H中沿水平方向擴展，—面利用流經内側之 排氣EG加熱一面朝向上方通過氧化劑流路nc、13〇。氧 化劑⑽通過氧化劑流路以、13B’ 1流經氧化劑供給構 件36之氧化劑流路13K，且通過貫通孔37、38而供給至電 池堆3，一部分用於燃燒部9之燃燒。燃燒部9中產生之排 氣EG藉由排氣流路12Α、12Β導引至排氣流路12(：、i2D， 且一面對流經外側之氧化劑OX供給熱一面朝向下方通過 排氣流路12C、12D。排氣EG到達至底部後流入至排氣流 路12E、12F，且一面對水氣化部4供給熱一面通過排氣流 路12E、12F。已通過排氣流路12£、12F之排氣EG自排氣 管32排出》 如圖1〜圖4所示’本實施形態之燃料電池模組1包含：本 體部50 ’其於對應於端壁部33、34及第2上壁部28之面分 別形成有開口部51Α、51Β、51C ;蓋體60Α，其覆蓋本體 部50之開口部51八；蓋體60Β，其覆蓋本體部5〇之開口部 51Β ;及蓋體60C，其覆蓋本體部50之開口部51C。本體部 50構成上述說明之各壁部中之側壁部16、17、21、22、 26、27、第1上壁部23、及底壁部18、24、29。又，蓋體 60Α構成端壁部33，蓋體6〇β構成端壁部34，蓋體60C構成 第2上壁部28 »再者，蓋體60Α及蓋體60Β之「長度方向」 與長度方向D1相等，且蓋體60C之「長度方向」與上下方 向D3相等。 本體部50於與端壁部33對應之面、即殼體6之端部6a側 163757.doc 201251190 之面包含用以安裝蓋體60A之蓋體支承部52A。蓋體支承 部52A係與蓋體60A之周緣部61(參照圖4)對向之矩形框狀 之凸緣部。蓋體支承部52A形成為自長度方向（蓋體6〇 A之 厚度方向）D1觀看時朝向殼體6之内側延伸。於蓋體支承部 52A之中央位置形成有矩形狀之開口部51Αβ藉此，蓋體 支承部52Α構成為自長度方向（蓋體6〇α之厚度方向）D1觀 看時遍及整周地包圍開口部51A。本體部50於與端壁部34 對應之面、即殼體6之端部6b側之面包含用以安裝蓋體6〇B 之蓋體支承部52B。蓋體支承部52B係與蓋體60B之周緣部 對向之矩形框狀之凸緣部。蓋體支承部52B形成為自長度 方向（蓋體60B之厚度方向）D1觀看時朝向殼體6之内側延 伸。於蓋體支承部52B之中央位置形成有矩形狀之開口部 51B。藉此’蓋體支承部52B構成為自長度方向（蓋體6〇b 之厚度方向）D1觀看時遍及整周地包圍開口部51B »本體部 50於與第2上壁部28對應之面、即殼體6之上端部側之面包 含用以安裝蓋體60C之蓋體支承部52C。蓋體支承部52C係 與蓋體60C之周緣部對向之矩形框狀之凸緣部。蓋體支承 部52C形成為自上下方向（蓋體60C之厚度方向）D3觀看時朝 向殼體6之内侧延伸.於蓋體支承部52C之中央位置形成有 矩形狀之開口部51C。藉此’蓋體支承部52C構成為自上 下方向（蓋體60C之厚度方向）D3觀看時遍及整周地包圍開 口部 51C。 蓋體支承部52A以與第3側壁部26、27、第3底壁部29、 及蓋體支承部52C無間隙、即確保氣密性之狀態連接。蓋 163757.doc -15- 201251190 體支承部52B以與第3側壁部26、27、第3底壁部29、及蓋 體支承部52C無間隙、即確保氣密性之狀態連接。蓋體支 承部52C以與第3側壁部26、27、及蓋體支承部52A、52B 無間隙、即確保氣密性之狀態連接。各蓋體支承部52A、 52B、52C亦可藉由焊接而固定，或者亦可藉由金屬板之 彎折而形成。 蓋體60A、60B、60C具有焊珠（第1凸部）62，該焊珠向密 封構件70側（於本實施形態中為本體部5〇側）突出，並且以 自各蓋體之厚度方向觀看時遍及整周地包圍開口部51八、 5 1B、51C之方式延伸◦焊珠62形成為以沿矩形狀之蓋體 60A、60B、60C之外緣63之各邊連續地延伸，無間隙地包 圍開口部51A、51B、51C之方式描繪矩形。焊珠62例如可 藉由將矩形框狀之凸構件焊接於蓋體6〇A、6〇b、6〇c之平 面而形成凸部。又，可藉由進行壓製加工而容易形成凸 。藉此，可削減焊接步驟。又，由於可確保蓋體、 60B、60C之氣密性，故而可減少氣密檢查部位。 於本實施形態中，說明藉由壓製加工形成焊珠62之例。 藉由將構成蓋體60A、60B、60C之金屬板於四邊分別擠出 成剖面U字狀，而於本體部50側之面形成凸形狀（參照圖4 及圖5)，並且於外側之面形成凹形狀（參照圖3及圖4)。焊 珠62之突出量、即焊珠62之凸形狀之前端部62&、與蓋體 60A、60B、60C之本體部50側之面6〇a之間的距離u(參照 圖4)較佳為遍及焊珠62之整周設定為固定。即，於焊珠“ 描繪之所有四邊中及各邊彼此之所有角部中，突出量。較 163757,doc •16· 201251190 佳為固定。 此處，參照圖4，對利用蓋體密封本體部5〇之開口部之 構造進一步進行詳細說明。再者，於圖4中表示了蓋體6〇a 密封開口部51A之構造，但蓋體60B密封開口部51B之構 造、蓋體60C密封開口部51C之構造亦相同。 於蓋體60A之焊珠62與蓋體支承部52八之間配置有用以 確保本體部50與蓋體60A之間的氣密性之密封構件7〇。密 封構件70以成為與焊珠62描繪之矩形大致相同之形狀及相 同大小之方式形成為矩形框狀。又，於固定蓋體6〇A時， 密封構件70配置為自長度方向（蓋體6〇A之厚度方向）〇1觀 看時與焊珠62重疊，且自該焊珠62之凸形狀賦予擠壓力。 藉此，密封構件7〇配置為自長度方向（蓋體6〇八之厚度方 向）D1觀看時遍及整周地包圍開口部51八。密封構件7〇遍及 開口部5 1A之整周無間隙地連續包圍開口部5丨a，藉此， 確保本體部50與蓋體60A之間的氣密性。焊珠62係矩形之 每一邊之剖面形狀形成為剖面U字狀，故而於矩形之各邊 中’與密封構件70進行線接觸而賦予擠壓力。 密封構件70之每一邊之寬度亦可為具有較圖4所示者更 大之寬度者（例如，如圖8所示為覆蓋蓋體支承部52A之大 整體者）’但為降低材料成本，較佳為設為至少確保氣 密性所需之程度之寬度《於本實施形態中，密封構件7〇僅 具有自長度方向（蓋體60A之厚度方向）D1觀看時覆蓋蓋體 支承部52A中較螺合部8〇之蓋形螺帽81更靠内周側之部 分’而不具有覆蓋較蓋形螺帽81更靠外周側之部分（及覆 163757.doc •17· 201251190 蓋鄰接之蓋形螺帽81彼此之間的部分）。由於藉由焊珠Q 之凸形狀而容易施力，故而較佳為使密封構件7〇之每一邊 之寬度稍大於焊珠62之每一邊之寬度。再者，亦可於蓋體 支承部52A中形成用以對密封構件7〇進行位置對準而設置 之導引槽。 於蓋體60A及蓋體支承部52 A形成有用以將蓋體6〇A固定 於蓋體支承部52A之螺合部80。螺合部80形成於自長度方 向（蓋體A之厚度方向）D1觀看時較開口部51A、焊珠62及 密封構件70更靠外側。又，螺合部80以包圍焊珠62之方式 隔開特定間隔而形成有複數個（參照圖3)。 螺合部80包含：蓋形螺帽81，其形成於蓋體支承部 52A ;貫通孔82，其形成於蓋體60A ;及螺拴83，其經由 貫通孔82螺合於蓋形螺帽81»蓋形螺帽81藉由在圓柱構件 84之一端側之面84a形成母螺紋部86而構成。母螺紋部86 以未貫通於圓柱構件84之另一面84b之方式形成。蓋形螺 帽81以於蓋體60A之固定時配置於較焊珠62更靠外側之方 式複數個固定於蓋體支承部52A。蓋形螺帽81以形成有母 螺紋部86之一端側之面84a向本體部50之外侧露出，被密 封之另一端側之面84b向本體部50之内部空間露出之方式 配置。於蓋形螺帽81之一端側之面84a之緣部，遍及整周 地於與蓋體支承部52A之間形成有焊接部87。藉此，確保 蓋形螺帽8 1與蓋體支承部52A之間的氣密性。 蓋體60A之貫通孔82於將蓋體60A固定於蓋體支承部52A 時，形成於與蓋形螺帽81之母螺紋部86對向之位置。貫通 163757.doc -18· 201251190 孔82之直徑設定為較螺栓83之螺紋部之直徑大且較螺釘頭 之直徑小，且於固定時，螺栓83之螺釘頭卡在貫通孔82之 緣部。螺栓83藉由插入至貫通孔82並且旋入至蓋形螺帽81 之母螺紋部86 ’而將蓋體60A向本體部50側播壓《焊珠62 藉由相對於密封構件70線接觸而賦予擠壓力，故而與藉由 面接觸而擠壓密封構件之情形（例如圖8所示之構造）相比， 即便減少螺栓83之緊固力，亦可充分確保氣密性。 於燃料電池系統之運轉中，由於燃料電池模組1之内部 充滿高溫氣體，故而熱傳達至燃料電池模組1之各部，而 存在產生熱變形之情形。若蓋體6〇A產生因熱變形而導致 之畸變，則有導致燃料電池模組丨内部之氣體洩漏之虞。 但是’根據本實施形態，焊珠62可使密封構件7〇之擠壓力 集中，並且提高蓋體6〇a自身之強度。密封性提昇之效果 於焊珠62形成於蓋體6〇A、6〇B、6〇c之情形、或形成於蓋 體支承部52A、52B、53C之情形時均可獲得。進而，於蓋 體60A、60B、60C中形成焊珠62之情形時，藉由卜欠加工 便可同時獲得密封性提昇之效果與蓋體6〇A之強度提昇之 效果。 此處，存在如下之情形，即，於蓋體6〇A、6〇B、6〇c中 形成用以使與殼體6内部之改質器或電池堆3之組合配管或 構件貫通之貫通孔’進而，存在於該貫通孔設置填料箱等 氣密構造之情形。此時，若於藉由壓製加工形成焊珠62之 後形成貫通孔’則藉由壓製加工而產生之殘留應力釋放， 構成蓋體60A、60B、60C之金屬板可能產生畸變（彎曲）。 163757.doc •19· 201251190 為確實地防止此種現象，本實施形態之蓋體60A、60B、 60C具有增強構造。參照圖3、圖5及圖6對該增強構造進行 說明。再者，圖5及圖ό雖僅表示蓋體60A之構成，但蓋體 60Β、60C亦具有相同之構成。 如圖3所示’於蓋體60Α、60Β、60C之外緣63形成有向 該蓋體之厚度方向延伸之折回部64。於本實施形態中，折 回部64朝向外側（本體部5〇之相反側）折回9〇。。折回部以形 成於外緣63之所有四邊，並且以包圍蓋體6〇Α、6〇Β、6〇c 之整周之方式連續地形成。藉此，蓋體6〇A、6〇b、60C之 強度提高。折回部64可藉由對蓋體60A ' 60B、60C之外緣 63進行彎折加工而形成，亦可藉由將另一構件焊接於外緣 63而構成。 如圖5及圖6所示，於蓋體60A中形成有貫通孔91，於該 貫通孔91中固定有填料箱等氣密機構sB。貫通孔91以内包 於圓形狀之焊珠（第2凸部）92之方式形成。即，藉由壓製加 工而於構成蓋體60A之金屬板之本體部50側之面形成凸形 狀’並且於外側之面形成凹形狀’藉此形成焊珠92，於該 凸凹形狀中形成貫通孔91。藉此，貫通孔91之周邊之金屬 板之強度提高。 作為加工蓋體60A之程序之一例，可列舉如下之程序。 首先’藉由對構成蓋體60A之金屬板進行壓製加工而形成 焊珠62及焊珠92。於該壓製加工後（或者亦可於壓製加工 之前）’藉由彎折加工等於外緣63形成折回部64。其次， 藉由打孔加工於焊珠92中形成貫通孔91，並且於較焊珠62 163757.doc -20- 201251190 更靠外側形成複數個貫通孔82。再者，蓋體60A之加工程 序並不限定於該例，亦可變更順序，亦可同時進行壓製加 工與貫通孔之形成，或亦可使用焊接等。 其次，對本實施形態之燃料電池模組1之作用、效果進 行說明。 首先，為了進行比較，參照圖7及圖8對先前之燃料電池 模組100之構造進行說明。先前之蓋體l6〇A、i6〇b、160C 係與本體部50之蓋體支承部52A、52B、52C對向之周緣部 161之部分、與覆蓋本體部50之開口部51A、51B、51C之 部分形成為不具有凹凸形狀之平板狀。即，周緣部161之 本體部50側之面形成為平面狀。蓋體i6〇A、i6〇b、160C 藉由與密封構件170面接觸而於與蓋體支承部52A、52B、 52C之間擠壓。密封構件170形成為覆蓋蓋體支承部52A、 52B、52C之大致整面之寬幅之矩形框狀。密封構件17〇於 對應於蓋形螺帽81及貫通孔82之位置具有圓形狀之複數個 貫通孔170a。 於如先前之燃料電池模組100般之構造中，成為密封構 件170藉由與蓋體160A、160B、160C之周緣部161及蓋體 支承部52A、52B、52C面接觸而賦予擠壓力之構造。於該 種構造中，由於成為藉由螺栓83及蓋形螺帽81之緊固而產 生之擠壓力分散於整個接觸面之面密封構造，故而存在難 以確保殼體106之氣密性之問題。進而，於該構造中，為 確保密封構件之接觸面積而必需使用寬度較寬之密封構 件，由此存在成本增加之問題。 163757.doc 201251190 圖9(b)係表示自蓋體i6〇A、ι6〇Β、160C之厚度方向觀看 時之作用於密封構件丨7 〇之擠壓力（以影線表示）。由於密封 構件170藉由面接觸而賦予擠壓力，故而擠壓力分散於整 個接觸面，於開口部51八、51^、51(：之整周中之一部分 (例如，圖中以PT所示之部分）擠壓力可能不充分。又於 藉由面接觸而賦予擠壓力之構造中，必需確保密封構件 170之寬度W2較寬，而使密封材料之搭載量增加，從而導 致成本增加。 根據本實施形態之燃料電池模組1，蓋體60A、60B、 60C包含焊珠62，該焊珠62向本體部50側突出，並且以自 厚度方向觀看時遍及整周地包圍開口部51A、51B、51C之 方式延伸。又，於該焊珠62與蓋體支承部52A、52B、52C 之間配置有自厚度方向觀看時遍及整周地包圍開口部 51A、51B、51C之密封構件70。藉由該種構造，將蓋體 60A、60B、60C固定於蓋體支承部52A、52B、52C時產生 之擠壓力集中於焊珠62。由於焊珠62以遍及整周地包圍開 口部51A、51B、51C之方式形成，故而可包圍開口部 51A' 51B、51C之整周將密封構件70擠壓成線狀。藉由該 種線密封構造’可確實地確保殼體6之氣密性。又，根據 該種線密封構造，僅於焊珠62附近擠壓力集中之部分配置 密封構件70即可’而可減少密封材料之搭載量從而可降低 成本。藉此，可抑制成本並且可確實地確保殼體6之氣密 性。 圖9(a)係表示自蓋體6〇a、6〇b、60C之厚度方向觀看時 163757.doc -22· 201251190 之作用於密封構件70之擠壓力（以影線表示）。焊珠62可使 擠壓力集中於該焊珠62描繪之矩形狀之線ls上。由於該線 LS以遍及整周地包圍開口部51Α、51Β、51C之方式形成， 故而藉由本實施形態之構造，而可構成遍及整周地密封開 口部51A、51B、51C之線密封構造。藉由使擠壓力集中於 包圍整周之線LS，而可確實地確保氣密性。又，於以線狀 賦予擠壓力之構造中’可使密封構件7〇之寬度Wi變窄， 而可減少密封材料之搭載量從而可抑制成本。 又’焊珠62藉由壓製加工而形成。例如，於藉由將矩形 框狀之凸構件焊接於蓋體之平面而形成凸部之情形時，必 需進行焊接檢查或焊接部位之氣密檢查。藉由進行壓製加 工而可容易形成凸部。又，可容易檢查，亦可確保蓋體 60A、60B、60C之氣密性》再者’亦可藉由焊接形成凸 部’以代替藉由壓製加工形成之焊珠62。 又’蓋體60A、60B、60C包含焊珠92，且於該焊珠92中 形成有貫通孔91。即便於蓋體60A、60B、60C中形成貫通 孔91之情形時’亦可藉由焊珠92而確保強度。於藉由焊接 而形成蓋體60A、60B、60C之焊珠62之情形、或藉由焊接 將氣密機構SB安裝於蓋體60A、60B、60C之情形時，焊珠 92可抑制因焊接之熱應力而導致之蓋體6〇八、6〇b、60C之 變形。又，於藉由壓製加工形成蓋體60A、60B、60C之焊 珠62之情形時，焊珠92可抑制因焊珠62之壓製加工時之殘 留應力之釋放而導致之蓋體6〇A、60B、60C之變形。 又，於蓋體60A、60B、60C之外緣63形成有向該蓋體 163757.doc -23- 201251190 60A、60B、60C之厚度方向之外側延伸之折回部64 »藉由 折回部64而確保蓋體60A、60B、60C之強度。即，即便於 發電中殼體6内之溫度成為高溫，折回部64亦可抑制因燃 料電池模組1内之溫度之高溫化而導致之蓋體60A、60B、 60C之變形。該種效果於焊珠62形成於蓋體6〇a ' 6〇b、 6〇C之情形、或形成於蓋體支承部52A ' 52B、53C之情形 時均可獲得。 又’於藉由焊接形成蓋體6〇A、60B ' 60C之焊珠62之情 形時’折回部64亦可抑制因焊接之熱應力而產生之畸變。 於此情形時’較佳為先形成折回部64，其後形成焊珠62。 又’於藉由壓製加工形成蓋體6〇八、6〇b、60C之焊珠62之 情形時，折回部64可抑制因焊珠62之壓製加工時之殘留應 力而導致之畸變。又，圖8所示之折回部164向厚度方向之 本體50側延伸。與該種構成相比’本實施形態之折回部 64向外側延伸，可抑制蓋體60Α、60Β、60C之變形’故而 本發明並不限定於上述實施形態。Gas, liquefied petroleum gas), urban gas, town gas, gasoline, naphtha, kerosene, diesel. Examples of the alcohols include methanol and ethanol. As the ether class, dimethyl ether can be cited. Examples of the biofuel include biogas, bioethanol, biodiesel, and biojet. As the oxidizing agent, for example, air, pure oxygen (may also contain impurities which are difficult to remove by a usual removal method), and oxygen-enriched air are used. The reformer 2 produces modified gas milk using the supplied hydrogen-containing fuel. The reformer 2 reforms the hydrogen-containing fuel to produce the reformed gas RG by using a modification reaction of the modified catalyst. The reforming mode of the reformer 2 is not particularly limited, and for example, a steam reformer, a partial oxidation reforming, and a self-heating reforming method may be employed. The reformer 2 is disposed on the upper side of the battery stack 3 so as to be heated by the following combustion heat, that is, the off gas introduced into the reformed gas RG on the fuel electrode side of the battery stack 3 (unreacted reforming) The gas is burned together with the unreacted oxygen (unreacted oxidant gas) in the oxidant such as air introduced into the air 163757.doc 201251190, and the reformer 2 is heated by the heat of combustion. The reformer 2 supplies the reformed gas RG to the fuel electrode of the battery stack 3. The battery stack 3 has a laminate of a plurality of batteries, which are regularly arranged and connected to each other, called s〇FC (s〇nd idexide Fuel Cells). Each of the batteries is formed by disposing an electrolyte as a solid oxide between the fuel electrode and the oxidant electrode to form "«electrolyte, for example, YSZ' Yttrium Stabilized Zirconia", and conducts oxide ions at a high temperature. The fuel electrode contains, for example, a mixture of nickel and YS/, and the oxide ions react with hydrogen in the reforming gas RG to generate electrons and water. The oxidant electrode, for example, contains Lanthanum Strontium Manganite, which reacts oxygen in the oxidant OX with electrons to produce oxide ions. The battery stack 3 is disposed on the upper surface of the susceptor 7 so as to be arranged in two rows so as to be parallel to the direction in which the power generating unit of the power generating unit including the battery stack 3 is disposed and to the direction orthogonal to the stacking direction of the respective batteries. However, the stack 3 can also be configured in one line. In the case where the battery stack 3 is arranged in two rows, the two battery stacks 3 constitute a power generating unit of the fuel cell module 1. When the battery stack 3 is one, the one battery stack 3 constitutes the power generating unit of the fuel cell module 1. When the battery stack 3 is three or more, the three or more battery stacks 3 constitute a fuel cell module. 1 power generation unit. Since the power generating unit is provided in the first bottom wall portion 18 via the susceptor 7, in the present embodiment, the first bottom wall portion 丨8 corresponds to the power generating unit installation surface on which the power generating unit is disposed. In addition, the battery stack 3 may be formed by connecting a plurality of batteries, and the shape of the battery is not particularly limited 'may not be a shape that can be laminated. In the present embodiment, the number is 163757.doc 201251190 The battery stack 3 in which the batteries are erected on the susceptor 7 and aligned in a line in the same direction will be described as an example. Here, the direction in which a plurality of batteries are erected on the susceptor 7 and aligned in a line in the same direction and referred to as a "stacking direction" will be described below. The base 7 and the reformer 2 are connected by a tube 8. The reformed gas RG supplied from the reformer 2 is supplied to each of the batteries of the battery stack 3 via the susceptor 7. The reformed gas RG and the oxidant OX which are not reacted in the stack 3 are burned by the burning portion 9 at the upper portion of the stack 3. The reformer 2 is heated by the combustion of the exhaust gas in the combustion unit 9, and an exhaust gas EG is generated. The water vaporization unit 4 generates a supply to the reformer 2 by heating and heating the supplied water. water vapor. The steam generated by the water vaporizing unit 4 is supplied to the reformer 2 by, for example, a pipe (not shown) that connects the water vaporizing unit 4 and the reformer 2 through the first bottom wall portion 18. The heating of the water in the water vaporization unit 4 may be, for example, the heat generated in the fuel cell module 1 such as the heat of the reformer 2, the heat of the combustion unit 9, or the heat of the exhaust gas EG. In the present embodiment, the water vaporization unit 4 is configured as an exhaust gas flow path disposed at the bottom portion, and recovers heat of the exhaust gas EG. Further, when the reforming reaction occurring in the reformer 2 is not accompanied by the steam reforming reaction, the water vaporizing portion 4 can be omitted. The casing 6 includes a metal case having a rectangular parallelepiped shape for housing the reformer 2, the battery stack 3, and the inner gas space of the water vaporization unit*. The casing 6 includes a storage chamber 11 that houses the battery stack 3, and an exhaust flow path 12' that is formed outside the storage chamber 11 and that circulates the exhaust gas EG generated by the combustion of the exhaust gas from the battery stack 3; The oxidant flow path 13 circulates the oxidant enthalpy, and each wall portion forms a storage chamber U, an exhaust gas flow path 12, or an oxidant flow (four). Further, in the following description, the direction along the lamination direction of each of the batteries of the stack 3 is referred to as the "longitudinal direction D1" of the casing 6, and the layers are horizontally stacked with the respective batteries. The direction in which the directions are orthogonal is the "width direction D2" of the casing 6, and the direction in which the direction is orthogonal is the "up-and-down direction D3" of the casing 6, and the following description will be made. In the present embodiment, the storage chamber 丨丨, the exhaust gas flow path 12, the oxidizing agent flow path 13, and the respective wall portions formed therein are configured to be bilaterally symmetrical when viewed from the longitudinal direction di. The storage chamber 11 is formed inside the first side wall portions 16 and 17 which face each other in the width direction D 2 and the second bottom wall portion 18 which is connected to the lower end portions of the first side wall portions 16 and 17. In the storage chamber π, the susceptor 7 is disposed in the first bottom wall portion 18. Further, a heat insulating material may be disposed between the first bottom wall portion 18 and the susceptor 7. In order to allow the exhaust gas EG generated in the combustion unit 9 to flow, the upper end opening of the storage chamber 11 and the exhaust flow path 12 are disposed on the second side of the outer side of the first side wall portions 16 and 17 in the width direction D2. The portions 21 and 22 are disposed on the upper side of the upper side wall portion 16 and the upper end portion of the upper portion of the upper portion. The upper wall portion 23 and the second bottom wall portion 24 disposed on the lower side of the i-th bottom wall portion 18 are formed. The first upper wall portion 23 is coupled to the upper end portions of the second side wall portions 21 and 22, and The second bottom wall portion 24 is coupled to the lower end portions of the second side wall portions 21 and 22. The second side wall portions 21 and 22 are disposed apart from the first side wall portions 16 and 17, and are disposed to face each other. The jth upper wall portion 23 is disposed to be spaced apart from the upper end portion of the storage chamber 11, and is disposed to face. The second bottom wall portion 24 is disposed apart from the first bottom wall portion 18 and disposed to face the first bottom wall portion 18. The exhaust gas flow path 12 includes exhaust gas flow paths 12A and 12B which are formed between the opening portion on the upper side of the storage chamber 11 and the first upper wall portion 23; the exhaust flow path 163757.doc 201251190 12C, 12D, These are formed between the second side wall portions 21 and 22 and the first side wall portions 16 and 17 , and the exhaust gas flow paths 12E and 12F are formed in the second bottom wall portion 24 and the first bottom wall portion 18 . between. The exhaust gas passages 128, 12B guide the exhaust gas EG from the combustion portion 9 to the exhaust gas flow paths 12C, 12D. The exhaust gas flow paths 12 (:, 12D flow the exhaust gas EG downward, and supply the heat of the exhaust gas EG to the oxidant enthalpy flowing through the outer oxidant flow paths 13C and 13D. The exhaust flow paths 12E and 12F enable The exhaust gas EG flows in the horizontal direction toward the exhaust pipe 32, and supplies the heat of the exhaust gas EG to the water vaporization unit 4. The oxidant flow path 13 is disposed in the second side wall portions 21 and 22 in the width direction D2, respectively. The third side wall portions 26 and 27 on the outer side, the second upper wall portion 28 disposed on the upper side of the first upper wall portion 23, and the third bottom wall disposed on the lower side of the second bottom wall portion 24 The second upper wall portion 28 is connected to the upper end portions of the third side wall portions 26 and 27, and the third bottom wall portion 29 is coupled to the lower end portions of the third side wall portions 26 and 27. The third side wall portion 26, The second upper wall portion 28 is disposed apart from the first upper wall portion 23 and disposed so as to be spaced apart from the second side wall portions 21 and 22. The second upper wall portion 28 is disposed so as to be opposite to the first upper wall portion 23. The second bottom wall portion 24 is disposed to be spaced apart from each other. A slit 39 extending in the longitudinal direction (1) is formed in a central portion of the first upper wall portion 23, and an oxidizing agent supply member % is inserted into the slit 39. Oxidant The supply member 36 supplies the oxidizing agent OX to the battery stack 3. The sputum supply member extends so as to enter a gap between the pair of battery stacks 3, and has an oxidizing agent flow path 13K inside, and has a through hole at the front end portion. 37. π. The oxidant flow path 13 includes an oxidant flow path ΐ, ΐ3β, which is formed between the second upper wall portion 28 and the i-th upper wall portion 23; the oxidant flow path η., 163757.doc 12 201251190 13D ' These are formed between the third side wall portions 26 and 27 and the second side wall portions 21 and 22, and the oxidizing agent flow paths 13G and 13H are formed between the third bottom wall portion 29 and the second bottom wall portion 24. The oxidizing agent channels 13G and 13H allow the oxidizing agent OX from the gas supply pipe 31 to flow in the horizontal direction and are guided to the oxidizing agent channels 13C and 13D. The oxidizing agent channels 13C and 13D circulate the oxidizing agent OX upward, and The oxidizing agent θ is heated by the heat of the exhaust gas EG flowing through the inner exhaust gas flow paths 12C and 12D. The oxidizing agent flow paths 3a and 3B circulate the oxidizing agent OX from the outside in the width direction D2 and flow into the oxidant supply. The oxidant flow path 13K of the member 36 is guided to the through 37. 38. The third bottom wall portion 29 is provided with an air supply pipe 31 for allowing an oxidizing agent to flow from the oxidizing agent supply portion (not shown) to the oxidizing agent flow path 13. Further, the second bottom wall portion 24 is provided with an exhaust gas from the exhaust gas. The exhaust pipe 32 through which the exhaust of the flow path 12 is discharged. The side wall portions 16, 17, 21, 22, 26, 27, the upper wall portions 23, 28, and the bottom wall portions 18, 24, 29 extend to the shell in the longitudinal direction D1 The end portions 6a and 6b of the body are provided with end wall portions 33 and 34 at both end portions of the longitudinal direction D1 of the casing 6. The third side wall portions 26, 27, the second upper wall portion 28, the third bottom wall portion 29, and the end wall portions 33, 34 constitute a fuel cell module! The outer casing ensures the tightness in the joints of each other, thereby ensuring the airtightness in the casing 6. Next, the flow of the reformed gas RG, the oxidant enthalpy, and the exhaust gas £(} will be described. The hydrogen-containing fuel supplied from the outside and the water vapor from the water vaporization unit 4 are used and generated by the reformer 2. The reformed gas 11 (} flows into the susceptor 7 through the tube 8, and is supplied from the susceptor 7 to each battery of the battery stack 3. The modified gas caliper flows through the battery stack 3 from the bottom toward the top, and a part is used as an exhaust gas. The combustion portion 9 I63757.doc 13 201251190. The oxidant ox is supplied from the outside through the gas supply pipe 31, and expands in the horizontal direction in the oxidant flow paths 13G and 13H, and the surface is heated upward by the exhaust gas EG flowing through the inner side. The oxidant flow paths nc, 13 〇. The oxidant (10) flows through the oxidant flow path 13K through the oxidant supply path 13K of the oxidant supply member 36, and is supplied to the battery stack 3 through the through holes 37 and 38, and a part is used for combustion. The combustion of the portion 9 is performed. The exhaust gas EG generated in the combustion portion 9 is guided to the exhaust flow path 12 (:, i2D by the exhaust flow paths 12, 12, and is directed toward the hot side of the oxidant OX flowing through the outer side. Passing through the exhaust flow paths 12C, 12D below. Exhaust E G reaches the bottom and flows into the exhaust flow paths 12E, 12F, and passes through the exhaust flow paths 12E, 12F as soon as the water vaporization portion 4 supplies heat. The exhaust EG that has passed through the exhaust flow paths 12, 12F As shown in FIG. 1 to FIG. 4, the fuel cell module 1 of the present embodiment includes a main body portion 50' corresponding to the end wall portions 33, 34 and the second upper wall portion 28. Openings 51Α, 51Β, 51C are respectively formed; a cover body 60Α covering the opening portion 51 of the body portion 50; a cover body 60Β covering the opening portion 51Β of the body portion 5〇; and a cover body 60C covering the body portion The opening portion 51C of the 50. The main body portion 50 constitutes the side wall portions 16, 17, 21, 22, 26, 27, the first upper wall portion 23, and the bottom wall portions 18, 24, 29 of the respective wall portions described above. The lid body 60A constitutes the end wall portion 33, the lid body 6〇β constitutes the end wall portion 34, and the lid body 60C constitutes the second upper wall portion 28. Further, the "length direction" and the length direction of the lid body 60Α and the lid body 60Β D1 is equal, and the "longitudinal direction" of the lid body 60C is equal to the up-and-down direction D3. The main body portion 50 is on the side corresponding to the end wall portion 33, that is, the end portion 6a side of the casing 6 163757.doc 20125119 The surface of 0 includes a lid support portion 52A for attaching the lid body 60A. The lid body support portion 52A is a rectangular frame-shaped flange portion that faces the peripheral edge portion 61 (see Fig. 4) of the lid body 60A. The portion 52A is formed to extend toward the inner side of the casing 6 when viewed in the longitudinal direction (the thickness direction of the lid body 6A) D1. A rectangular opening portion 51Αβ is formed at a central position of the lid body supporting portion 52A, whereby the lid body The support portion 52 is configured to surround the opening portion 51A over the entire circumference when viewed in the longitudinal direction (the thickness direction of the lid body 6A). The main body portion 50 includes a lid support portion 52B for attaching the lid body 6B to the surface corresponding to the end wall portion 34, that is, the surface on the end portion 6b side of the casing 6. The lid support portion 52B is a rectangular frame-shaped flange portion that faces the peripheral edge portion of the lid body 60B. The lid support portion 52B is formed to extend toward the inner side of the casing 6 when viewed in the longitudinal direction (the thickness direction of the lid body 60B) D1. A rectangular opening 51B is formed at a central position of the lid support portion 52B. The lid body support portion 52B is configured to surround the opening portion 51B and the main body portion 50 on the surface corresponding to the second upper wall portion 28 over the entire circumference when viewed in the longitudinal direction (the thickness direction of the lid body 6〇b) D1. That is, the surface on the upper end side of the casing 6 includes a lid support portion 52C for mounting the lid 60C. The lid support portion 52C is a rectangular frame-shaped flange portion that faces the peripheral edge portion of the lid body 60C. The lid support portion 52C is formed to extend toward the inner side of the casing 6 when viewed from the vertical direction (the thickness direction of the lid body 60C) D3. A rectangular opening portion 51C is formed at the center of the lid support portion 52C. By this, the lid support portion 52C is configured to surround the opening portion 51C over the entire circumference when viewed from the upper and lower directions (the thickness direction of the lid body 60C) D3. The lid support portion 52A is connected to the third side wall portions 26 and 27, the third bottom wall portion 29, and the lid support portion 52C without a gap, that is, in a state of ensuring airtightness. Cover 163757.doc -15- 201251190 The body support portion 52B is connected to the third side wall portions 26 and 27, the third bottom wall portion 29, and the lid support portion 52C without a gap, that is, in a state of ensuring airtightness. The lid supporting portion 52C is connected to the third side wall portions 26 and 27 and the lid supporting portions 52A and 52B without a gap, that is, in a state where airtightness is ensured. Each of the cover supporting portions 52A, 52B, 52C may be fixed by welding or may be formed by bending a metal plate. The lids 60A, 60B, and 60C have solder beads (first convex portions) 62 that protrude toward the sealing member 70 side (in the present embodiment, the side of the main body portion 5), and are viewed from the thickness direction of each cover. The solder ball 62 is formed so as to extend around the openings 51, 5, 1B, and 51C over the entire circumference so as to continuously extend along the sides of the outer edges 63 of the rectangular covers 60A, 60B, and 60C without gaps. A rectangle is drawn so as to surround the openings 51A, 51B, and 51C. The bead 62 can be formed, for example, by welding a rectangular frame-shaped convex member to the flat surfaces of the lids 6A, 6〇b, and 6〇c. Further, it is easy to form a convex by performing press working. Thereby, the welding step can be reduced. Further, since the airtightness of the lids, 60B, and 60C can be ensured, the airtight inspection portion can be reduced. In the present embodiment, an example in which the bead 62 is formed by press working will be described. The metal plates constituting the lid bodies 60A, 60B, and 60C are extruded into a U-shaped cross section on each of the four sides, and a convex shape is formed on the surface of the main body portion 50 (see FIGS. 4 and 5). A concave shape is formed (see FIGS. 3 and 4). The amount of protrusion of the bead 62, that is, the front end portion 62& of the convex shape of the bead 62, and the distance u (see Fig. 4) between the surface 6a of the main body portion 50 side of the cover body 60A, 60B, 60C is preferably (refer to Fig. 4). The entire circumference of the bead 62 is set to be fixed. That is, in all the corners of the bead "depicted" and in all corners of each side, the amount of protrusion is better than 163757, doc • 16· 201251190. Here, referring to FIG. 4, the body portion is sealed by the cover body. The structure of the opening portion of the cymbal is further described in detail. In addition, in FIG. 4, the structure in which the lid body 6a seals the opening portion 51A is shown, but the lid body 60B seals the structure of the opening portion 51B, and the lid body 60C seals the opening portion. The structure of the 51C is also the same. A sealing member 7 is provided between the bead 62 of the lid 60A and the lid support portion 52 to ensure airtightness between the body portion 50 and the lid 60A. The sealing member 70 is The shape is substantially the same as the shape of the rectangle drawn by the bead 62 and the same size is formed in a rectangular frame shape. Further, when the cover body 6A is fixed, the sealing member 70 is disposed from the length direction (the thickness of the cover body 6A) The direction 〇1 overlaps with the bead 62 at the time of viewing, and the pressing force is given from the convex shape of the bead 62. Thereby, the sealing member 7〇 is arranged to be viewed from the longitudinal direction (the thickness direction of the cover 6〇8) D1 The opening portion 51 is surrounded by the entire circumference. The sealing member 7 The opening portion 5a is continuously surrounded without a gap throughout the entire circumference of the opening portion 51A, thereby ensuring airtightness between the main body portion 50 and the lid body 60A. The cross-sectional shape of each side of the bead 62 is formed into a rectangular shape. The cross section is U-shaped, so that the pressing force is applied to the sealing member 70 in each of the sides of the rectangle to give a pressing force. The width of each side of the sealing member 70 may also be larger than that shown in FIG. 4 ( For example, as shown in FIG. 8, the cover body support portion 52A is covered as a whole. However, in order to reduce the material cost, it is preferable to set the width required for at least the airtightness. In the present embodiment, the seal is used. The member 7A only has a portion that covers the inner peripheral side of the cap nut 81 of the cap portion 8A of the cover supporting portion 52A when viewed from the longitudinal direction (the thickness direction of the lid body 60A) D1 without covering The portion closer to the outer peripheral side than the cap nut 81 (and the portion between the cap-shaped nut 81 adjacent to the cap 163757.doc • 17· 201251190). It is easy to apply force by the convex shape of the bead Q Therefore, it is preferable that the width of each side of the sealing member 7 is slightly larger than the welding The width of each side of the bead 62. Further, a guide groove for positioning the sealing member 7A may be formed in the cover supporting portion 52A. The cover 60A and the cover supporting portion 52 A may be formed. A screwing portion 80 for fixing the lid body 6A to the lid body supporting portion 52A is formed. The screwing portion 80 is formed to be closer to the opening portion 51A and the bead 62 when viewed from the longitudinal direction (the thickness direction of the lid body A) D1. Further, the sealing member 70 is further disposed on the outer side. Further, the screwing portion 80 is formed in plural numbers (see FIG. 3) so as to surround the welding beads 62. The screwing portion 80 includes a cap nut 81, which is formed. a cover supporting portion 52A; a through hole 82 formed in the cover 60A; and a thread 83 screwed to the cap nut 81»the cap nut 81 via the through hole 82 by being at one end of the cylindrical member 84 The side surface 84a is formed by forming the female screw portion 86. The female screw portion 86 is formed so as not to penetrate the other surface 84b of the cylindrical member 84. The cap nut 81 is fixed to the lid support portion 52A in a plurality of ways so as to be disposed outside the bead 62 when the lid body 60A is fixed. The cap nut 81 is exposed to the outside of the main body portion 50 at a surface 84a on which one end side of the female screw portion 86 is formed, and the other end side surface 84b of the sealed portion is disposed to be exposed to the inner space of the main body portion 50. At the edge of the surface 84a on the one end side of the cap nut 81, a welded portion 87 is formed between the lid support portion 52A and the entire circumference. Thereby, the airtightness between the cap nut 81 and the lid support portion 52A is ensured. The through hole 82 of the lid body 60A is formed at a position facing the female screw portion 86 of the cap nut 81 when the lid body 60A is fixed to the lid body support portion 52A. The diameter of the hole 82 is set to be larger than the diameter of the screw portion of the bolt 83 and smaller than the diameter of the screw head, and when fixed, the screw head of the bolt 83 is caught at the edge of the through hole 82. The bolt 83 pushes the cover 60A toward the body portion 50 side by being inserted into the through hole 82 and screwed into the female screw portion 86' of the cap nut 81. "The solder ball 62 is in line contact with the sealing member 70. When the pressing force is applied, the airtightness can be sufficiently ensured even when the fastening force of the bolt 83 is reduced as compared with the case where the sealing member is pressed by the surface contact (for example, the structure shown in Fig. 8). In the operation of the fuel cell system, since the inside of the fuel cell module 1 is filled with high-temperature gas, heat is transmitted to each portion of the fuel cell module 1, and thermal deformation occurs. If the cover 6A is distorted due to thermal deformation, there is a risk of gas leakage inside the fuel cell module. However, according to the present embodiment, the bead 62 concentrates the pressing force of the sealing member 7 and increases the strength of the lid 6〇a itself. The effect of improving the sealability can be obtained when the beads 62 are formed on the lids 6A, 6B, 6〇c or in the case of the lid support portions 52A, 52B, and 53C. Further, in the case where the bead 62 is formed in the lids 60A, 60B, and 60C, the effect of improving the sealing property and the effect of improving the strength of the lid body 6A can be simultaneously obtained by the undercut processing. Here, there is a case in which the cover pipes 6A, 6B, and 6B are formed to penetrate the combination pipe or member of the reformer or the battery stack 3 inside the casing 6. Further, the hole 'in the case where the through hole is provided with an airtight structure such as a stuffing box. At this time, if the through-holes are formed after the bead 62 is formed by press working, the residual stress generated by the press working is released, and the metal plates constituting the covers 60A, 60B, and 60C may be distorted (bent). 163757.doc • 19· 201251190 In order to reliably prevent such a phenomenon, the lids 60A, 60B, and 60C of the present embodiment have a reinforcing structure. This reinforcing structure will be described with reference to Figs. 3, 5 and 6. Further, although Fig. 5 and Fig. 5 show only the configuration of the lid body 60A, the lid bodies 60A and 60C have the same configuration. As shown in Fig. 3, a folded portion 64 extending in the thickness direction of the lid body is formed on the outer edge 63 of the lid body 60A, 60A, 60C. In the present embodiment, the folded portion 64 is folded back toward the outer side (opposite side of the main body portion 5A) by 9 turns. . The folded-back portions are formed on all four sides of the outer edge 63, and are continuously formed so as to surround the entire circumference of the cover bodies 6〇Α, 6〇Β, 6〇c. Thereby, the strength of the lids 6A, 6B, and 60C is improved. The folded portion 64 can be formed by bending the outer edge 63 of the lids 60A' 60B, 60C, or by welding the other member to the outer edge 63. As shown in Fig. 5 and Fig. 6, a through hole 91 is formed in the lid body 60A, and an airtight mechanism sB such as a stuffing box is fixed to the through hole 91. The through hole 91 is formed to be wrapped in a round bead (second convex portion) 92. In other words, the surface of the main body portion 50 side of the metal plate constituting the lid body 60A is formed into a convex shape by a pressing process, and a concave shape is formed on the outer surface, thereby forming a bead 92 in which a through hole is formed. 91. Thereby, the strength of the metal plate around the through hole 91 is improved. As an example of the procedure for processing the lid body 60A, the following procedure can be mentioned. First, the bead 62 and the bead 92 are formed by press working a metal plate constituting the lid 60A. After the pressing process (or before the press working), the folded portion 64 is formed by the bending process equal to the outer edge 63. Next, a through hole 91 is formed in the bead 92 by punching, and a plurality of through holes 82 are formed on the outer side of the bead 62 163757.doc -20-201251190. Further, the addition procedure of the lid body 60A is not limited to this example, and the order may be changed, and the press working and the through hole may be simultaneously formed, or welding or the like may be used. Next, the action and effect of the fuel cell module 1 of the present embodiment will be described. First, for the purpose of comparison, the structure of the prior fuel cell module 100 will be described with reference to Figs. 7 and 8 . The portions of the front cover portion 166A, i6〇b, and 160C that face the peripheral edge portion 161 of the cover supporting portions 52A, 52B, and 52C of the main body portion 50 and the opening portions 51A, 51B, and 51C that cover the main body portion 50. The portion is formed into a flat plate shape having no uneven shape. That is, the surface of the peripheral portion 161 on the side of the main body portion 50 is formed in a planar shape. The lids i6〇A, i6〇b, and 160C are pressed between the lid support portions 52A, 52B, and 52C by being in surface contact with the sealing member 170. The sealing member 170 is formed in a rectangular frame shape that covers a substantially entire surface of the lid supporting portions 52A, 52B, and 52C. The sealing member 17 is formed in a plurality of through holes 170a having a circular shape at positions corresponding to the cap nut 81 and the through hole 82. In the structure of the fuel cell module 100 as in the prior art, the sealing member 170 is brought into a pressing force by being in surface contact with the peripheral edge portion 161 of the lids 160A, 160B, and 160C and the lid supporting portions 52A, 52B, and 52C. structure. In such a structure, since the pressing force generated by the fastening of the bolt 83 and the cap nut 81 is dispersed over the entire surface of the contact surface, there is a problem that it is difficult to ensure the airtightness of the casing 106. . Further, in this configuration, it is necessary to use a sealing member having a wide width in order to secure the contact area of the sealing member, whereby there is a problem of an increase in cost. 163757.doc 201251190 Fig. 9(b) shows the pressing force (indicated by hatching) acting on the sealing member 丨7 观看 when viewed from the thickness direction of the lids i6〇A, ι6〇Β, 160C. Since the sealing member 170 imparts a pressing force by surface contact, the pressing force is dispersed over the entire contact surface, and is one of the entire circumference of the opening portion 51, 51, 51 (for example, as shown by PT in the drawing) In the configuration in which the pressing force is imparted by the surface contact, it is necessary to ensure that the width W2 of the sealing member 170 is wide, and the amount of the sealing material to be loaded is increased, resulting in an increase in cost. In the fuel cell module 1 of the present embodiment, the lids 60A, 60B, and 60C include solder beads 62 that protrude toward the main body portion 50 and surround the openings 51A, 51B over the entire circumference when viewed in the thickness direction. Further, a sealing member 70 that surrounds the openings 51A, 51B, and 51C over the entire circumference when viewed from the thickness direction is disposed between the bead 62 and the lid support portions 52A, 52B, and 52C. According to this configuration, the pressing force generated when the lid bodies 60A, 60B, and 60C are fixed to the lid body supporting portions 52A, 52B, and 52C is concentrated on the welding beads 62. Since the beads 62 surround the opening portion 51A over the entire circumference, Form 51B, 51C, so it can be surrounded The sealing member 70 is extruded into a line shape over the entire circumference of the mouth portions 51A' 51B, 51C. With this wire sealing structure 'the airtightness of the casing 6 can be surely ensured. Further, according to the wire sealing structure, only By arranging the sealing member 70 in a portion where the pressing force is concentrated in the vicinity of the bead 62, the amount of the sealing material can be reduced, and the cost can be reduced. Thereby, the cost can be suppressed and the airtightness of the casing 6 can be surely ensured. Fig. 9(a) shows the pressing force (indicated by hatching) acting on the sealing member 70 when viewed from the thickness direction of the covers 6a, 6B, and 60C, 163757.doc -22·201251190. 62, the pressing force can be concentrated on the rectangular line ls drawn by the bead 62. Since the line LS is formed to surround the openings 51A, 51B, and 51C over the entire circumference, the structure of the present embodiment is used. Further, the wire sealing structure for sealing the openings 51A, 51B, and 51C over the entire circumference can be formed. By concentrating the pressing force on the line LS surrounding the entire circumference, the airtightness can be surely ensured. In the configuration imparting the pressing force, the width Wi of the sealing member 7 can be narrowed, but It is possible to suppress the cost by reducing the amount of the sealing material. The welding bead 62 is formed by press working. For example, when a convex member having a rectangular frame shape is welded to the plane of the lid to form a convex portion, it is necessary. The welding inspection or the airtight inspection of the welded portion is performed. The convex portion can be easily formed by press working, and the inspection can be easily performed, and the airtightness of the cover bodies 60A, 60B, and 60C can be ensured. The convex portion ' is formed by welding instead of the bead 62 formed by press working. The 'covers 60A, 60B, and 60C include the bead 92, and the through hole 91 is formed in the bead 92. That is, when the through holes 91 are formed in the lids 60A, 60B, and 60C, the strength can be ensured by the beads 92. When the bead 62 of the cover 60A, 60B, 60C is formed by welding or the airtight mechanism SB is attached to the cover 60A, 60B, 60C by welding, the bead 92 can be suppressed by welding The deformation of the cover body 6〇8, 6〇b, 60C caused by thermal stress. Further, in the case where the bead 62 of the lid bodies 60A, 60B, 60C is formed by press working, the bead 92 can suppress the cover body 6A, which is caused by the release of the residual stress during the press working of the bead 62. 60B, 60C deformation. Further, the outer peripheral edge 63 of the lid bodies 60A, 60B, and 60C is formed with a folded-back portion 64 extending toward the outer side in the thickness direction of the lid body 163757.doc -23-201251190 60A, 60B, and 60C by the folded portion 64. The strength of the covers 60A, 60B, 60C. In other words, even if the temperature in the casing 6 during power generation becomes high, the folded portion 64 can suppress deformation of the lids 60A, 60B, 60C due to the temperature increase in the fuel cell module 1. This effect can be obtained when the bead 62 is formed in the case of the lids 6〇a '6〇b, 6〇C or in the case of the lid support portions 52A' 52B, 53C. Further, when the bead 62 of the lid body 6A, 60B' 60C is formed by welding, the folded portion 64 can also suppress distortion caused by thermal stress of welding. In this case, it is preferable to form the folded portion 64 first, and thereafter the bead 62 is formed. Further, in the case where the bead 62 of the cover body 6〇8, 6〇b, 60C is formed by press working, the folded portion 64 can suppress the distortion caused by the residual stress at the time of press working of the bead 62. Further, the folded portion 164 shown in Fig. 8 extends toward the main body 50 side in the thickness direction. In contrast to this configuration, the folded portion 64 of the present embodiment extends outward, and deformation of the lids 60A, 60A, and 60C can be suppressed. Therefore, the present invention is not limited to the above embodiment.
又’貫通孔91亦可不形成於焊珠92中，而 平面部分。 對本體部具有3個開口部且利用3個 說明’但本體部之開口部之個數 限定於此。例如，開口部及蓋體之 ，而形成於蓋’體之 於外緣63之所有四邊，例 折回部64亦可不連續地形成於 163757.doc •24· 201251190 如，外緣63之各邊 《折回部64彼此亦可（於基m & > 部分等）隔開。又^ 议1盍體之四角之 亦可僅形成於任一邊。又， 遭又折回部μ .上向外側折回9 0。，但折回方向及折回 角度並無特別限定。你丨, 例如，亦可於蓋體之厚度方向 側折回90。（例如，如国〇 _ 汁又乃同上向内 折回部。 圖所不之態樣）。或者，亦可不設置 蓋體支承部及螺合部之構成並不限定於上述實施形 態’只要可確保殻體内部之氣密性，則可適當變更。例 如，於上述實施形態中，蓋體支承部以自蓋體之厚度方向 觀看時向殼體之内側擴展之方式形成，但亦可以向外側擴 展之方式形成。即，蓋體支承部構成為擴展至較包圍開口 部之四方之壁部更靠外侧。隨之，蓋體之緣部亦向較開口 部更靠外側（較四方之壁部更靠外側）擴展，螺合部、密封 部及焊珠（第1凸部）亦配置於較開口部更#外側。又，螺合 部亦可構成為藉由將螺栓固定於蓋體支承部，且自外部旋 緊螺帽而固定蓋體。 又，於上述實施形態中，構成為蓋體包含向蓋體支承部 側突出之焊珠（第1凸部），且密封構件於蓋體之焊珠（第1凸 部）與蓋體支承部之間受到擠壓。亦可取而代之，而構成 為蓋體支承部包含向蓋體侧突出之焊珠（第1凸部），且密封 構件於蓋體支承部之焊珠（第1凸部）與蓋體之間受到擠壓。 即’藉由壓製加工等將如包圍開口部之焊珠形成於蓋體支 承部，且並非於蓋體中形成如實施形態中對應於焊珠62之 凸部，而使其成為平板狀。再者，亦可構成為於蓋體與蓋 163757.doc -25- 201251190 體支承部之兩者中形成谭珠，㈣珠自兩側擠虔密封構 件。 又，於對電池堆之燃料極供給自燃料電池系統外部導入 之純氫、富氫之氣體等無需進行改質處理之燃料而並非改 質氣體之燃料電池系統中，可省略改f器2、水氣化部4。 又，亦可採用如圓10所示之構成。圖1〇所示之蓋體6〇a 於自厚度方向D1觀看時較焊珠62更靠外周側具有貫通孔 82，且於自厚度方向⑴觀看時較貫通孔82更靠外周側具有 向蓋體支承部52A側突出之焊珠65。焊珠65與密封用之焊 珠62相同，可遍及整周地形成，亦可於中途間斷。 如圖11所示，即便產生因發電中之燃料電池模組〖内之 溫度之高溫化而導致之蓋體60A之變形（於圖丨丨中，以虛線 st表示變形前之蓋體60A之内側之面之位置），焊珠65亦藉 由使該蓋體60A於外周側與蓋體支承部52A接觸而支持蓋 體60A。藉此，焊珠65可抑制蓋體60A之變形。藉由焊珠 65支持蓋體60A，而可確實地維持焊珠62對密封構件7〇之 擠壓力。再者，焊珠65可藉由焊接而形成，亦可藉由塵製 加工而形成。又’焊珠65亦可形成於蓋體支承部52A，且 向蓋體60A側突出。 又，亦可採用如圖12所示之構成。圖12所示之蓋體60A 於自厚度方向D1觀看時較焊珠62更靠内周側具有向與焊珠 62相反之側（外側）突出之焊珠66。焊珠66以沿著焊珠62延 伸之方式形成。焊珠66與密封用之焊珠62同樣可遍及整周 地形成，亦可於中途間斷。 163757.doc •26- 201251190 如圖13所示’即便產生因發電中之燃料電池模組1内之 溫度之高溫化而導致之蓋體60A之變形（於圖13中，以虛線 ST表示變形前之蓋體60A之内側之面之位置），焊珠66亦可 於焊珠62之内周側抑制該蓋體60A之變形。藉此，焊珠66 可抑制蓋體60A之密封部分之焊珠62附近之變形。藉此， 可確實地維持焊珠62對密封構件70之擠壓力。再者，焊珠 66可藉由焊接而形成，亦可藉由壓製加工而形成。 【圖式簡單說明】 圖1係本發明之實施形態之燃料電池模組之概略構成 圖。 圖2係沿著圖1所示之II-II線之剖面圖。 圖3係本發明之實施形態之燃料電池模組之立體圖。 圖4係沿著圖3所示之IV-IV線之剖面圖。 圖5係表示本體部側之面之蓋體之構造的立體圖。 圖6係沿著圖5所示之VI-VI線之剖面圖。 圖7係先前之燃料電池模組之立體圖》 圖8係先前之燃料電池模組之剖面圖，係對應於圖4之 圖。 圖9(a)、（b)係表示自蓋體之厚度方向觀看時之作用於密 封構件之擠壓力之情況的圖。 圖10係變形例之燃料電池模組之剖面圖。 圖11係用以說明圖10所示之燃料電池模組之作用、效果 之模式圖。 圖12係變形例之燃料電池模組之剖面圖。 163757.doc •27· 201251190 圖13係用以說明圖12所示之燃料電池模組之作用、效果 之模式圖。 【主要元件符號說明】 1 燃料電池模組 2 改質器 3 電池堆 4 水氣化部 6 殼體 7 基座 8 管 9 燃燒部 11 收納室 12 排氣流路 12A 排氣流路 12B 排氣流路 12C 排氣流路 12D 排氣流路 12E 排氣流路 12F 排氣流路 13 氧化劑流路 13A 氧化劑流路 13B 氧化劑流路 13C 氧化劑流路 13D 氧化劑流路 163757.doc -28- 201251190 13G 氧化劑流路 13H 氧化劑流路 13K 氧化劑流路 16 第1側壁部 17 第1側壁部 18 第1底壁部 21 第2側壁部 22 第2側壁部 23 第1上壁部 24 第2底壁部 26 第3側壁部 27 第3側壁部 28 第2上壁部 29 第3底壁部 31 供氣管 32 排氣管 36 氧化劑供給構件 37 貫通孔 38 貫通孔 39 狹縫 50 本體部 51A 開口部 51B 開口部 51C 開口部 163757.doc -29- 201251190 52A 蓋體支承部 52B 蓋體支承部 52C 蓋體支承部 60 蓋體 60A 蓋體 60B 蓋體 60C 蓋體 61 周緣部 62 焊珠（第1凸部） 64 折回部 65 焊珠（第3凸部） 66 焊珠（第4凸部） 70 密封構件 80 螺合部 91 貫通孔 92 焊珠（第2凸部） D2 寬度方向 D3 上下方向 EG 排氣 OX 氧化劑 RG 改質氣體 163757.doc -30-Further, the through hole 91 may not be formed in the bead 92 but in the flat portion. There are three openings in the main body portion and three explanations are used. However, the number of the openings of the main body portion is limited to this. For example, the opening portion and the cover body are formed on all four sides of the outer edge 63 of the cover body. For example, the folded portion 64 may be discontinuously formed on 163757.doc •24·201251190, for example, on the sides of the outer edge 63. The folded-back portions 64 may also be spaced apart from each other (in the base m &> portion, etc.). Also, the four corners of the body 1 can be formed on either side. In addition, it is folded back and turned back to the outer side. However, the folding direction and the folding angle are not particularly limited. You can, for example, fold back 90 on the side of the thickness of the cover. (For example, if the country _ juice is the same as the inward fold back. The picture is not the case). Alternatively, the configuration in which the lid support portion and the screw portion are not provided is not limited to the above-described embodiment. As long as the airtightness inside the casing can be ensured, it can be appropriately changed. For example, in the above embodiment, the lid support portion is formed to extend toward the inner side of the casing when viewed from the thickness direction of the lid body, but may be formed to expand outward. That is, the lid supporting portion is configured to extend to the outside of the wall portion surrounding the opening portion. Then, the edge portion of the lid body is also extended to the outside of the opening portion (outer than the wall portion of the square portion), and the screw portion, the sealing portion, and the bead (the first convex portion) are also disposed at the opening portion. #外. Further, the screw portion may be configured to fix the cover by fixing the bolt to the lid support portion and screwing the nut from the outside. Further, in the above-described embodiment, the lid body includes a bead (first convex portion) that protrudes toward the lid support portion, and the sealing member is formed on the bead of the lid (first projection) and the lid support portion. Squeeze between. Alternatively, the lid supporting portion may include a bead (first convex portion) that protrudes toward the lid side, and the sealing member is received between the bead (first convex portion) of the lid supporting portion and the lid body. extrusion. In other words, the bead surrounding the opening is formed in the lid support portion by press working or the like, and the convex portion corresponding to the bead 62 in the embodiment is not formed in the lid body to have a flat shape. Furthermore, it is also possible to form a bead in both the cover and the cover 163757.doc -25- 201251190 body support, and the (iv) bead squeezes the sealing member from both sides. Further, in the fuel cell system in which the fuel electrode of the battery stack is supplied with pure hydrogen or a hydrogen-rich gas introduced from the outside of the fuel cell system without reforming the fuel, and is not a reformed gas, the device 2 can be omitted. Water vaporization section 4. Further, a configuration as shown by the circle 10 can also be employed. The cover body 6A shown in FIG. 1A has a through hole 82 on the outer peripheral side of the bead 62 when viewed from the thickness direction D1, and has a cover toward the outer peripheral side of the through hole 82 when viewed from the thickness direction (1). The bead 65 protrudes from the body support portion 52A side. The bead 65 is formed in the same manner as the bead 62 for sealing, and may be formed over the entire circumference or may be interrupted in the middle. As shown in Fig. 11, even if the temperature of the inside of the fuel cell module in power generation is high, the deformation of the lid body 60A is caused (in the figure, the inside of the lid body 60A before deformation is indicated by a broken line st). The bead 65 also supports the lid 60A by bringing the lid 60A into contact with the lid support portion 52A on the outer peripheral side. Thereby, the bead 65 can suppress deformation of the lid 60A. By supporting the cover 60A by the bead 65, the pressing force of the bead 62 against the sealing member 7 can be surely maintained. Further, the bead 65 may be formed by welding or may be formed by dust processing. Further, the bead 65 may be formed on the lid supporting portion 52A and protrude toward the lid 60A side. Further, a configuration as shown in Fig. 12 can also be employed. The lid body 60A shown in Fig. 12 has a bead 66 protruding toward the opposite side (outside) of the bead 62 from the inner side of the bead 62 when viewed from the thickness direction D1. The bead 66 is formed to extend along the bead 62. The bead 66 can be formed over the entire circumference as well as the bead 62 for sealing, and can be interrupted in the middle. 163757.doc •26- 201251190 As shown in Fig. 13, 'the deformation of the lid body 60A caused by the temperature increase in the fuel cell module 1 during power generation (in Fig. 13, the dotted line ST indicates the deformation before The bead 66 can also suppress the deformation of the lid 60A on the inner peripheral side of the bead 62 by the position of the inner surface of the lid 60A. Thereby, the bead 66 can suppress deformation in the vicinity of the bead 62 of the sealing portion of the cover 60A. Thereby, the pressing force of the bead 62 against the sealing member 70 can be surely maintained. Further, the solder balls 66 may be formed by soldering or may be formed by press working. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic configuration diagram of a fuel cell module according to an embodiment of the present invention. Figure 2 is a cross-sectional view taken along line II-II of Figure 1. Fig. 3 is a perspective view of a fuel cell module according to an embodiment of the present invention. Figure 4 is a cross-sectional view taken along line IV-IV of Figure 3. Fig. 5 is a perspective view showing the structure of a lid body on the surface of the main body portion side. Figure 6 is a cross-sectional view taken along line VI-VI of Figure 5. Figure 7 is a perspective view of a prior fuel cell module. Figure 8 is a cross-sectional view of a prior fuel cell module, corresponding to Figure 4 . Figs. 9(a) and 9(b) are views showing the state of the pressing force acting on the sealing member when viewed from the thickness direction of the lid body. Fig. 10 is a cross-sectional view showing a fuel cell module according to a modification. Fig. 11 is a schematic view for explaining the action and effect of the fuel cell module shown in Fig. 10. Figure 12 is a cross-sectional view showing a fuel cell module according to a modification. 163757.doc • 27· 201251190 Fig. 13 is a schematic view for explaining the action and effect of the fuel cell module shown in Fig. 12. [Main component symbol description] 1 Fuel cell module 2 Reformer 3 Battery stack 4 Water vaporization unit 6 Housing 7 Base 8 Tube 9 Combustion unit 11 Storage chamber 12 Exhaust flow path 12A Exhaust flow path 12B Exhaust Flow path 12C Exhaust flow path 12D Exhaust flow path 12E Exhaust flow path 12F Exhaust flow path 13 Oxidant flow path 13A Oxidant flow path 13B Oxidant flow path 13C Oxidant flow path 13D Oxidant flow path 163757.doc -28- 201251190 13G Oxidizer flow path 13H Oxidizer flow path 13K Oxidizer flow path 16 First side wall portion 17 First side wall portion 18 First bottom wall portion 21 Second side wall portion 22 Second side wall portion 23 First upper wall portion 24 Second bottom wall portion 26 Third side wall portion 27 Third side wall portion 28 Second upper wall portion 29 Third bottom wall portion 31 Air supply pipe 32 Exhaust pipe 36 Oxidizer supply member 37 Through hole 38 Through hole 39 Slit 50 Main body portion 51A Opening portion 51B Opening portion 51C opening 163757.doc -29- 201251190 52A cover support portion 52B cover support portion 52C cover support portion 60 cover 60A cover 60B cover 60C cover 61 peripheral portion 62 bead (first projection) 64 fold Part 65 Beads (3rd convex part) 66 Bead (4th convex part) 70 Sealing member 80 Screwing part 91 Through-hole 92 Bead (2nd convex part) D2 Width direction D3 Up-and-down direction EG Exhaust OX oxidizer RG Modified gas 163757.doc -30-