201144730 六、發明說明 【發明所屬之技術領域】 本發明，是關於使電極乾燥的電極乾燥裝置》 (本申請案，是以2009年12月24日於日本所 的特願2009-292056號爲優先權並沿用其內容。） 【先前技術】 以往以來之作爲電池者，周知有一次電池或二 池。於近年，作爲二次電池之一者，鋰離子二次電池 注目。鋰離子二次電池，相較於鉛蓄電池等之其他的 電池，係具有：可取得較高電壓、能量密度較高、庫 率較闻等之特長。 鋰離子二次電池，於例如貯藏電解液之容器的內 爲其正極夾隔著隔板而與負極分離而被收容的構造。 是在集電體塗佈有正極活性物質，負極是在集電體塗 負極活性物質。於容器外面，設有接連於正極的正 子、以及接連於負極的負極端子。 正極或負極等之電極，是在作爲母材之集電體的 塗佈電極活性物質（正極活性物質或是負極活性物質 形成（例如，專利文獻1、2 )。所形成之薄片狀 極，藉由沖裁加工成所需要的電極形狀，然後再收容 池容器。 例如如鋰離子二次電池等，電解液爲非溶水電解 電池的電極，無論是以哪一種方法來製造時，在被收 申請 次電 倍受 二次 倫效 部， 正極 佈有 極端 薄片 )所 的電 於電 質之 容到 201144730 電池容器之內部的狀態下，電極都必須要呈高度的乾燥。 這是因爲當有水分附著於電極、特別是電極活性物質（正 極活性物質或是負極活性物質）時，電解液成分會與水分 反應而產生電池劣化。 作爲使電極乾燥的方法者，周知有利用加熱使水分蒸 發的方法、或是在減壓環境下使水分蒸發的方法。電極的 乾燥，一般是在已塗佈電極活性物質至加工成電極形狀之 期間，電極活性物質的水分尙未充分被乾燥的狀態下所進 行的。 [先前技術文獻] [專利文獻] [專利文獻1]日本特開2001-23630號公報 [專利文獻2]日本特開平11-67220號公報 【發明內容】 [發明所欲解決之問題] 在由電熱線等所進行的加熱方法，雖然提高乾燥速度 十分容易，不過卻有電極熱劣化之虞。又，由減壓所進行 的加熱方法，由於沒有使用熱源，所以可以避免電極的熱 劣化，不過在乾燥上就需要較長時間因此會有生產性較低 之虞。如此地，在以往的電極乾燥方法下，要一面防止電 極的熱劣化同時又要效率良好地使電極乾燥是有其困難 性。 本發明，是有鑑於上述情事而硏創，其目的在於提供 201144730 一種可以防止電極乾燥時的劣化，而且能夠效率良好地使 電極乾燥之電極乾燥裝置。 [發明解決問題之技術手段] 本發明之電極乾燥裝置，係具備：第1光源，其可照 射出紅外線光、及平面狀的第1遮熱材，其可透過上述紅 外線光、及第1氣體供給裝置，其冷卻第1氣體並供給冷 卻氣體、及第2氣體供給裝置，其乾燥第2氣體並供給乾 燥氣體、以及第1電極搬運區域，並使上述冷卻氣體流 入：上述第1光源與上述第1遮熱材之一方的面之間，使 上述乾燥氣體流入：上述第1遮熱材之另一方之面上的上 述第1電極搬運區域。 如此實施下，可使來自光源的紅外線光照射於：附著 在第1電極搬運區域所搬運之電極上的水分，藉由使水分 吸收紅外線光而促進水分的蒸發。又，由於可使來自第2 氣體供給裝置所供給的乾燥氣體流入於：第1遮熱材之另 —方的面上的第1電極搬運區域，所以可以促進：附著在 第1電極搬運區域所搬運之電極上之水分的蒸發。再者由 於從第1光源朝向電極之傳熱遞是由遮熱材所阻隔，所以 可以降低電極的加熱。由於在第1光源與第1遮熱材之一 方的面之間，流入從第1氣體供給裝置所供給的冷卻氣 體，所以可以降低電極受到第1光源的熱而被加熱。如以 上所述，電極在乾燥時，可以顯著地降低電極被加熱之情 形，並且顯著地促進附著於電極之水分的蒸發，所以可以 201144730 一面防止電極的劣化，同時可一面效率良好地乾燥電極。 [發明效果] 依據本發明的電極乾燥裝置’由於可以顯著地促進附 著於電極之水分的蒸發，而且顯著地降低電極的加熱，所 以可以防止電極的熱劣化，並且能夠效率良好地使電極乾 燥。 【實施方式】 [發明實施之用以形態] 以下，參照圖面同時說明本發明的實施形態。在說明 所用的圖面中，爲了使特徵的部分可易於明瞭地顯示，有 時會使圖面中之構造尺寸或是縮尺，不同於實際的構造。 在實施形態中對於同樣的構成要素，會標示以相同符號來 圖示，並省略其詳細說明。 在進行電極乾燥裝置的說明之前，一面參照第1圖同 時對電池之構成例進行說明。如第1圖所示，作爲單電池 之一例的二次電池1，係包含：電池容器i 〇、作爲電極端 子的正極端子1 1及負極端子1 2。二次電池1，例如是鋰 離子二次電池等非溶水電解質的二次電池。電池容器 1 0，例如爲鋁製的中空容器。本例之電池容器1 〇 ,其外 形雖大致爲角柱狀（大致長方體狀），不過外形爲圓柱狀 亦可。正極端子11及負極端子12，各設1個在電池容器 1 0的外表面。 -8 - 201144730 於電池容器10的內部，容納有作爲電極的正極板13 及負極板14。 正極板13，是與負極板14相對向配置。正極板13 及負極板14，係於相互相對向的方向上重複配置。於正 極板13與負極板14之間設置有隔板15,使正極板13成 爲不與負極板14接觸。正極板13及負極板14，是以導 體箔或是導體薄板等之薄片狀的集電體作爲母材，並於母 材表面施有由所對應之電解成分之電極活性物質的塗層而 成。隔板1 5，例如是由樹脂薄膜等之絕緣材料所成。 在位於負極板14之負極端子12側的端部，形成有負 極突片14a。使所有重複配置的複數個負極板14的負極 突片14a —起都與負極端子12電氣性地接連。在位於正 極板1 3之正極端子1 1側的端部，形成有正極突片1 3 a。 使所有重複配置的複數個正極板1 3的正極突片1 3 a —起 都與正極端子1 1電氣性地接連。 於電池容器1 0的內部，貯藏有可與正極板1 3及負極 板14接觸之方式存在之含有鋰離子的電解成分。作爲電 解成分之貯藏形態者，例如可以是將包含有電解成分的電 解液貯存在電池容器1 〇內部之形態，也可以是將包含有 電解成分的固體物容納在電池容器1 0內部之形態。 作爲典型的電解液者，可以舉出將六氟磷酸鋰或是四 氟硼酸鋰等之鋰鹽溶解在碳酸乙烯或是碳酸乙酯等之有機 溶媒中之溶液等。當如此之非溶水電解液中有水分混入 時，由於電解液與水分反應或是導致電解成分不安定等， -9 - 201144730 就會造成電解液劣化。在此觀點下，正極板1 3或負極板 1 4等之電極，在被容納於電池容器1 0的製程階段必須被 高度地乾燥（例如，水分含有率在重量比lOppm以 下）。 其次，參照第2圖〜第5圖同時說明第1實施形態的 電極乾燥裝置。第2圖，是槪略性地顯示電池製造方法之 一實施形態的流程圖；第3圖，是第1實施形態之電極乾 燥裝置2之槪略構成的模式圖；第4圖，電極乾燥裝置2 之內部的氣體的流通路徑的模式圖；第5圖，是從上觀察 電極乾燥裝置的斷面圖。 如第2圖所示，於製造作爲電池之一例的二次電池1 時，在步驟S1中，於作爲電極母材之薄片狀的集電體塗 佈電極活性物質，形成薄片狀的電極。然後，在步驟S2 中將薄片狀的電極藉由沖壓等將電極活性物質的膜壓著於 母材，在步驟S3中使薄片狀的電極乾燥。然後，在步驟 S4中藉由落料沖裁（起模）薄片狀的電極等進行形狀加 工而形成正極板13或負極板14等。然後，在步驟S5 中，將正極板1 3、隔板1 5、負極板1 4予以積層並使之相 互固定而形成積層體。然後，在步驟S 6中將積層體容納 於電池容器〗〇並加以封止之後，在步驟S7中藉由將電解 液注入於電池容器1 〇的內部然後封止等，而製得二次電 池1。電極乾燥裝置2，是被使用在例如步驟S3中用以使 薄片狀的電極乾燥上。 如第3圖所示，電極乾燥裝置2，係具備：電極容納 -10 - 201144730 室20、遮熱材21a〜21η、光源群22a〜22g、搬運滾 24a〜24g、241〜244、第1氣體供給裝置26、第2氣 供給裝置27、以及排氣裝置28。遮熱材21a〜21η、光 群22a〜22g以及搬運滾子24a〜24g’是被配置在電極 納室20的內部。電極捲筒23a、23b、第1氣體供給裝 26、第2氣體供給裝置27、以及排氣裝置28，是被配 在電極容納室20的外部。電極乾燥裝置2，槪略而言 以以下方式動作。 由在薄片狀的集電體上塗佈電極活性物質所形成的 片狀電極E，在經由沖壓製程後被捲繞而成爲電極捲 23a。電極E，是作爲電池用之電極，可以是一次電池 或是二次電池用皆可。在此，是以作爲第1圖所示之二 電池用的電極爲例來說明。 從電極捲筒23a所導出的電極E，是順著位在電極 納室20之外部的搬運滾子24 1以及位在電極容納室20 內部且是配置於薄片狀之電極E之搬入口的搬運滾 242，然後再順著搬運滾子24a〜24g而搬經電極容納 20的內部。在電極容納室20的內部，對電極E照射來 於光源群2 2 a〜2 2 g的紅外線光，藉由光吸收來蒸發附 於電極E的水分或是在電極E的電極活性物質所含的 分。電極E，一面被搬運於電極容納室20的內部同時 乾燥之後，在電極容納室20的內部經由被配置在薄片 電極E之搬出口的搬運滾子2 4 3、和位在電極容納室 之外部的搬運滾子244而被捲繞成電極捲筒23b。各搬 子 體 源 容 置 置 是 薄 筒 用 次 容 之 子 室 商 著 水 被 狀 20 運 -11 - 201144730 滾子的轉動方向以及薄片狀電極E的搬運方向係以箭頭表 示。以下，詳細說明電極乾燥裝置2的構成要素。 於電極容納室20的內部，複數個遮熱材21a〜21η爲 相互分離而排列。遮熱材21 a〜21η，爲具有面向Υ-Ζ方 向之板面的大致板狀構件。遮熱材21a〜21η，係重覆地 配置於其各別的法線方向（X方向）。遮熱材2 1 a〜2 1 η， 是由：可使從光源群22a〜22g所射出的紅外線光所透 過，且熱傳導率較低之材料，例如由石英所成的耐熱玻璃 所構成。以下將遮熱材21a〜21η，從X正方向朝向X負 方向依排列順序，稱爲：第1遮熱材21 a、第2遮熱材 21b、第3遮熱材21c、第4遮熱材21d、第5遮熱材 21e、第6遮熱材21f、第7遮熱材21g、第8遮熱材 21h、第9遮熱材21i、第10遮熱材21j、第11遮熱材 21k、第12遮熱材211、第13遮熱材21m、第14遮熱材 2 1 η 〇 於複數個遮熱材21a〜21η之間，配置有光源群22a 〜22g。光源群22a〜22g之各個，爲含有朝向Y方向排列 的複數個光源。光源，爲可以照射出包含波長2 # m〜4 A m左右的中紅外線的紅外線光。光源，只要可以照射出 紅外線光，即使是射出包含有可視光之光線者亦可。 複數個光源之各個，例如是藉由以Z方向爲軸之大致 呈柱狀的鹵素燈所構成。光源’其Z方向的長度是與電極 E之寬幅相同程度，並且是由Z方向的兩端部所支撐。以 下將光源群2 2 a〜2 2 g，從X正方向朝向X負方向依排列 -12- 201144730 順序，稱爲：第1光源群22a、第2光源群22b、第3光 源群22c、第4光源群22d、第5光源群22e、第6光源 群22f、第7光源群22g。以1〜7的整數作爲N，將第N 光源群（N = 1〜7 )所包含之各個光源合稱爲第N光源。 於第（2xN-l )遮熱材與第（2xN )遮熱材之間配置 有第N光源群。換言之，被第（2χΝ·_1 )遮熱材與第（2x Ν )遮熱材所包圍的部分，成爲用以容納第Ν光源群的第 Ν光源容納室。例如，相當於Ν = 1的第1遮熱材2 1 a與第 2遮熱材21b之間，係成爲容納第1光源群22a的第1光 源容納室2 5 a。第1〜第7光源容納室2 5 a〜2 5 g，係於X 方向相互開離地排列。在此，在本實施形態中，爲配置有 7個光源容納室，亦即是設成爲1$NS7(N爲整數）， 不過在設計上可以因應乾燥度要求來變更N的數量。因 此，因應設計，配置7個以上的光源容納室亦可。 在第1光源依順序所配置的Y軸上且是於Y軸的正 方向側，配置有第1搬運滾子24a的旋轉軸，同樣地在第 3光源依順序所配置的Y軸上且是於γ軸的正方向側，配 置有第3搬運滾子24c的旋轉軸。並分別在第5光源依順 序所配置的Y軸上且是於Y軸的正方向側，配置有第5 搬運滾子24e的旋轉軸’以及在第7光源依順序所配置的 Y軸上且是於Y軸的正方向側，配置有第7搬運滾子24g 的旋轉軸。在第1〜第7光源容納室25a〜25g與第1、第 3、第5、以及第7搬運滾子24a、24c、24e、24g之間， 設置有分隔板294。於分隔板294設置有細縫。電極E， -13- 201144730 可經由分隔板294的細縫而移動在分隔板294的光 '源容_ 室側與搬運滾子側之間。 在第2光源依順序所配置的Y軸上且是於γ軸的負 方向側，配置有第2搬運滾子24b的旋轉軸，同樣地在第 4光源依順序所配置的Y軸上且是於Y軸的負方向側，配 置有第4搬運滾子24d的旋轉軸。而且，在第6光源依順 序所配置的Y軸上且是於Y軸的負方向側，配置有第6 搬運滾子24f的旋轉軸。 在第1〜第7光源容納室25a〜25g與第2、第4'以 及第6搬運滾子24b、24d、24f、242、243之間，設置有 分隔板295。於分隔板295設置有細縫。電極E，可經由 分隔板2 9 5的細縫而移動在分隔板2 9 5的光源容納室側與 搬運滾子側之間。 搬運滾子24a〜24g及搬運滾子242' 243是呈朝向Z 方向延伸的圓柱狀形狀，且寬幅比薄片狀電極E更寬，且 在各別之Z方向的兩端部受到支撐。此等搬運滾子之位在 XY平面上之斷面的半徑，是設計成：使電極薄片E在通 過電極容納室之一方的壁面與第1光源容納室之間、及第 1與第2光源容納室之間、及第3與第4光源容納室之 間、及第5與第6光源容納室之間、以及第7光源容納室 與電極容納室20之另一方的壁面之間，以不會接觸於此 等光源容納室或該等壁面之方式而通過。具體而言，該等 半徑，是設計成：比第N光源與第N遮熱材或與第 (N+1)遮熱材之在X軸方向的間距還更大，且比第N光 -14- 201144730 源與第（2N+1 )遮熱材或與第（2n_2 )遮熱材之在χ軸 方向的間距還更小。藉由配置分隔板294、295，可以顯 著地降低例如搬運滾子側之微小雜屑等侵入到光源容納室 側。 電極E ’依順序從第1搬運滾子24a被掛架於第2搬 運滾子24b、第3搬運滾子2 4c、第4搬運滾子24d、第5 搬運滾子24e、第6搬運滾子24f'第7搬運滾子2 4g，並 以此順序沿經第1〜第7搬運滾子2 4 a〜2 4 g而被搬運。 電極E，每一經由第1〜第7搬運滾子24a〜24g的每一 個，其行進方向就變化大致1 80度，以一面蛇行在電極容 納室20的內部地被搬運，同時一面被來自光源群22a〜 22g的紅外線光所照射。 具體而言，電極E，在從電極容納室20的搬入口被 搬運至內部之後，沿著與位於第1遮熱材2 1 a的第1光源 群22a側之面爲相反側的面，一面往Y軸的正方向（第1 方向）地朝向第1搬運滾子24a行進，同時一面被來自第 1光源群22a的紅外線光所照射。 然後，電極E，經由第1搬運滾子24a之後，往Y軸 的負方向（第2方向）並朝向第2搬運滾子241?地行進在 第2遮熱材21b與第3遮熱材21c之間。在第2遮熱材 21b與第3遮熱材21c之間，也就是在第1與第2光源容 納室25a、25b之間，電極E之X軸的正方向側的面被來 自於第1光源群2 2 a的紅外線光所照射’電極E之X軸 的負方向側的面被來自第2光源群22b的紅外線光所照 -15- 201144730 射。 電極E，經由第2搬運滾子24b之後，一面往 正方向並朝向第3搬運滾子24c地行進在第2與第 容納室25b、25c之間，同時一面被來自第2光源 與第3光源群22c的紅外線光所照射。 以下同樣地，電極E，接著經由第3搬運滾子 朝向Y軸的負方向地行進在第3與第4光源容納室 25d之間，接著經由第4搬運滾子24d後朝向Y軸 向地行進在第4與第5光源容納室2 5 d、2 5 e之間 經由第5搬運滾子24e後朝向Y軸的負方向地行進 與第6光源容納室25e、25f之間，接著經由第6 子24f後朝向Y軸的正方向地行進在第6與第7光 室25f、25g之間。然後，經由第7搬運滾子24g 面往Y軸的負方向並朝向搬運滾子2 43地行進在 第14遮熱材21η的第7光源群22g側之面爲相 面，同時一面被來自第7光源群2 2 g的紅外線光所 如此所進行之電極E，蛇行地行進在第1〜第 容納室2 5 a〜2 5 g之間。由於電極E蛇行地行進在 燥裝置2的內部，所以相較於不使其蛇行之情形， 面確保電極E之搬運路徑長度，同時可以顯著地將 燥裝置2小型化。 再者，電極E是一面蛇行同時被搬運的狀態下 別來自於相鄰之光源容納室所輻射出的紅外線光分 在電極E之一方的面與另一方的面。因此，相較於 Y軸的 3光源 群22b 2 4 c後 :25c' 的正方 ，接著 在第5 搬運滾 源容納 後，一 與位於 反側的 照射。 7光源 電極乾 可以一 電極乾 ，被分 別照射 僅從一 -16- 201144730 方的面來照射紅外線光，可以效率良好地使電極E乾燥。 由於第2〜第6光源群22b〜22f之各個，對於被搬運經 過光源群之兩側的電極E，可朝向X軸的正方向側及X 軸的負方向側照射紅外線光，所以可以減少光源的數量， 可以使電極乾燥裝置2低成本化或小型化。 第1氣體供給裝置26，是用以將空氣或非活性氣體 等之第1氣體予以冷卻而產生冷卻氣體G1 (請參照第4 圖）的裝置。第1氣體供給裝置26，是連接於配管291。 配管291，是分岐而連接於第1〜第7光源容納室25a〜 25g的一端。在此，配管291的分岐管’是與第1〜第7 光源容納室25a〜25g以1對1方式對應。第1〜第7光 源容納室2 5 a〜2 5 g的另一端，是連接於配管2 9 6。配管 296，是分岐而連接於第1〜第7光源容納室25a〜25g的 另一端。 如第4圖所示’由第1氣體供給裝置26所供給的冷 卻氣體G1，是通過配管291而流入至第1〜第7光源容 納室25 a〜25g的內部。冷卻氣體G1，以朝向Y軸的正方 向流通於第1〜第7光源容納室25a〜25g的內部’然後 在第1〜第7光源容納室25a〜25g之Y軸的正方向側的 端部處，從第1〜第7光源容納室的內部排出。從第1〜 第7光源容納室2 5 a〜2 5 g的內部所排出的冷卻氣體G 1 ’ 例如包含採用乾燥度比後述之第2氣體更小之氣體之情开夕 時亦然，是以對於電極E產生較少影響之方式來通過配管 296，然後從設置在電極容納室20之壁面的排氣用配管 -17- 201144730 29 3的近旁排出。之後’被排出於該近旁的冷卻氣體G1 藉由排氣裝置28經由配管293而被排放到電極容納室20 的外部。藉此，冷卻氣體G 1之乾燥度較小於乾燥氣體G2 之情形時，可以避免冷卻氣體G1接觸到電極E會使冷卻 氣體G1的水分附著於電極E。 第2氣體供給裝置27 ’是用以將空氣或非活性氣體 等之第2氣體予以乾燥而產生乾燥氣體G2的裝置。第2 氣體，是與第1氣體爲相同之氣體亦可’爲不同之氣體亦 可。乾燥氣體G2的水分含有量’是按照乾燥後之電極E 的水分含有量，亦即是按照乾燥程度的目標値而設定。第 2氣體供給裝置27，是與配管292連接，配管292爲導通 於電極容納室20的內部。 由第2氣體供給裝置27所供給的乾燥氣體G2，是通 過配管292而流入至電極容納室20的內部。流入至電極 容納室20內部的乾燥氣體G2，係流入在分隔板294與分 隔板295的範圍內，第1〜第7光源容納室25a〜25g之 間，也就是流入電極E的搬運路徑》 具體上，如第5圖所示，配管292是被延長地配置 在：避開電極E之電極乾燥裝置2內的側面。並且，配管 2 92，在各光源容納室之間，設有複數個與電極E之各搬 運路徑33a〜33h相對應之用以從靠近第1〜第7光源容 納室25a〜25g之處流入乾燥氣體G2的氣體流入口。通過 第1〜第7光源容納室25a〜25g之間的乾燥氣體G2，係 與從第1〜第7光源容納室25a〜25g的內部所排出的冷 -18- 201144730 卻氣體G1匯流，藉由排氣裝置28而經配管293排放至 電極容納室20的外部。 在此，也可以作成將配管2 9 6與配管2 9 3直接連結之 構成，再更進一步地設置沒有圖面出之乾燥氣體G2用的 排氣裝置，並將該配管插入至電極容納室20之構成。也 就是，冷卻氣體G1用的排氣裝置與乾燥氣體G2用的排 氣裝置各別設置亦可。藉由如此實施，於冷卻氣體G1與 乾燥氣體G2爲不同的氣體之情形時》可以避免彼此的氣 體相互混合而因化學反應產生發熱等之不良情況。又，若 冷卻氣體G 1的乾燥度比乾燥氣體G2更小之情形時，則 可更加良好地避免：冷卻氣體G 1接觸於電極E而使冷卻 氣體G1的水分附著於電極E。又，排氣裝置28，由於將 冷卻氣體G1與乾燥氣體G2予以排氣之同時可以將電極 容納室20內予以減壓，所以可以更有效地去除附著於電 極的水分。 其次，以微觀方式來說明行進於相鄰的光源容納室之 間的電極是如何地被乾燥。第6圖，是以微觀方式來說明 電極乾燥方法的說明圖；第7圖是顯示水的光吸收光譜的 曲線圖。 如第6圖所示，於光源容納室25之間，電極E被來 自於光源22的紅外線光1R所照射。附著於電極E的水分 Q或是電極E之電極活性物質所含有的水分Q，因吸收紅 外線光IR而昇溫。如第7圖所示，水的光吸收光譜，在 中紅外線的波長區域，特別是1 · 7 /z m〜3 · 4 # m的波長區 -19- 201144730 域中有吸收峰値。因此，紅外線光1R可以效率良好地被 水分Q所吸收，使水分Q有效地被加熱。 遮熱材2 1，由於是由可效率良好地透過紅外線光的 材料所形成，所以電極E所含有的水分Q在吸收該紅外 線光後分解、蒸發。例如，遮熱材2 1爲厚度1 mm〜1 0mm 之透明石英玻璃之情形時’因爲中紅外線的透過率爲 90%，所以當使用鹵素燈作爲光源22時’來自光源22的 紅外線光可以以高強度照射於水分Q ’使水分Q效率良好 地從電極E蒸發。 由水分Q的蒸發所產生的蒸氣’會伴隨於乾燥氣體 G 2而被運出至光源容納室2 5之間的外側，再藉由排氣裝 置28排放至電極容納室20的外部。由於蒸發後的水分立 刻藉由乾燥氣體G 2所搬運出去’所以可以防止水分再度 附著於電極E。又，對於要提高遮熱材21的絕熱效果時 雖是可以增加厚度即可’不過由於當厚度增加時透過率也 會降低，有鑑於裝置的小型化與乾燥效率’遮熱材21爲 透明石英玻璃之情形時，厚度爲4 m m以上1 0 m m以下爲 佳。 由光源2 2所輻射的熱H ’被遮熱材21所遮蔽’以防 止來自光源22的熱Η直接傳達給電極通過光源容納 室25之內部的冷卻氣體G1藉由被排氣裝置28所吸引， 在光源22產生的熱，係以冷卻氣體G1作爲冷媒而被朝 向光源容納室2 5的外部搬運’而降低傳導至遮熱材2 1的 熱量。又，遮熱材21 一向是熱傳導率較低的材料’所以 -20- 201144730 於遮熱材2 1中，從光源容納室2 5之內側的面，朝向搬運 中之電極E側的面所傳導的熱量會變得更小者。亦即，從 遮熱材21對電極E之二次輻射的熱量會變得更小。 然而，於鋰離子二次電池等所使用的電極，周知容易 產生熱劣化，例如當長時間曝露於1 30°C以上的溫度時， 就會造成特性下降。要不使電極的溫度上昇下而讓水分蒸 發，只要在不使用熱源下，使電極在真空環境中乾燥即 可。然而，在真空環境中使之乾燥的話就會使乾燥時間拉 長成爲長時間（例如數小時〜十數小時），造成電極的製 造效率降低。由於將乾燥用的處理室（例如真空處理室） 大型化時，會造成裝置成本高昇，所以要藉由裝置的大型 化來謀求乾燥處理的效率化也是有其困難的。 在電極乾燥裝置2中，由於是對電極E照射紅外線光 1R，所以可以選擇性地加熱水分Q，而減少電極E的昇 溫。防止來自於光源22 (光源群22a〜22g)的熱Η直接 性地傳達至電極Ε，由於是藉由遮熱材21 (21a〜21η)所 防止，所以可以減少電極Ε的昇溫。由於避免來自於遮熱 材2 1所輻射出的二次性的熱，所以減少了因二次性的熱 輻射所產生之電極Ε的昇溫。如此地，由於電極Ε的昇 溫顯著地降低，所以可防止電極Ε的熱劣化。 又，由於是照射紅外線光IR，所以可以有效率地加 熱水分Q，並效率良好地使水分Q蒸發。由於來自水分Q 的蒸氣是藉由乾燥氣體G2從電極Ε的周邊被搬運及除 出，所以可以效率良好地使水分Q蒸發。藉由排氣裝置 -21 - 201144730 28可以使電極容納室20的內部成爲減壓環境，所以可以 更進一步地促進水分Q的蒸發。如此地，由於水分Q的 蒸發顯著地被促進，所以可以效率良好地使電極E乾燥° 如以上所述地，依據電極乾燥裝置2，可以一面防止 電極E的熱劣化，一面效率良好地使電極E乾燥。其結 果是，能夠以低成本效率良好地製造具良好特性的電極 E，且能夠以低成本效率良好地製造具良好特性的電池。 其次，說明第2實施形態的電極乾燥裝置。第2實施 形態的電極乾燥裝置，是使第2氣體供給裝置包含有第1 氣體供給裝置，換言之，與第1實施形態大不相同的是具 備有：具有第1及第2氣體供給裝置兩者功能兼具的第3 氣體供給裝置，從該第3氣體供給裝置供給被乾燥且冷卻 過的乾燥冷卻氣體此點；還有，以與第1光源容納室一起 夾隔搬運路徑33a之方式來配置：與第1光源群相同之光 源群22 1a及光源群22 1a用遮熱材，以及以與第7光源容 納室一起夾隔搬運路徑33h之方式來配置：與第7光源群 相同之光源群221b及光源群221b用遮熱材此點。 第8圖，是顯示第2實施形態之電極乾燥裝置3其槪 略構成的模式圖。如第8圖所示，電極乾燥裝置3，係具 備有：包含有第1氣體供給裝置與第2氣體供給裝置之功 能的第3氣體供給裝置3 1、以及與第3氣體供給裝置3 1 連接並導通至電極容納室2 0內部的配管3 2。 第3氣體供給裝置3 1，是用以供給：將空氣或非活 性氣體等之所適當選擇的氣體予以冷卻並且加以乾燥的冷 -22- 201144730 卻乾燥氣體G3。冷卻乾燥氣體G3，通過配管3 2被供給 至電極容納室20的內部。由第3氣體供給裝置3 1所供給 的氣體，是經冷卻且乾燥後之至少1種（同一成分）的氣 體。如果是相互不會有反應等之氣體時，亦可以是經冷卻 且乾燥後之2種以上的氣體在混合後的狀態下由第3氣體 供給裝置3 1所供給之構成。 在本實施形態中，複數的光源22並列於Y方向而構 成光源群，複數的光源群於X方向相互間離地配置。薄 片狀的電極E，係與第1實施形態相同樣地，蛇行在光源 群之間而被搬運。又，以可以均等地對蛇行所搬運之電極 E的表裡兩面進行照射之方式來配置光源群。依每一朝向 Y軸的正方向或是Y軸的負方向之電極E的搬運路徑， 於搬運路徑與光源22之間配置遮熱材2 1。在本實施形態 中，受2個遮熱材2 1所夾隔並配置有光源22的區域，是 在遮熱材21之Y軸的正負方向的端部處，與電極容納室 20的內部導通。受2個遮熱材2 1所夾隔而並沒有配置有 光源22的區域（搬運路徑），是在遮熱材21之Y軸的 正負方向的端部處，與電極容納室20的內部導通。 被供給至電極容納室2 0內部之冷卻乾燥氣體G 3的 一部分，會流入受遮熱材2 1所夾隔並配置有光源22的區 域，產生作爲第1實施形態之冷卻氣體的功能。亦即，冷 卻乾燥氣體G 3，是從一方的面爲面對電極E搬運路徑之 遮熱材2 1的另一方的面或是從光源22奪走熱而流通過之 後，藉由排氣裝置2 8而經由配管2 9 3被排放至電極容納 -23- 201144730 室2 0的外部。 又，被供給至電極容納室20內部之冷卻乾燥氣體G3 的一部分，會流入與電極Ε面對之遮熱材21與電極Ε之 間，產生作爲第1實施形態之乾燥氣體的功能。亦即’冷 卻乾燥氣體G3會伴隨從電極Ε所蒸發的水分而流通過之 後，藉由排氣裝置28而經由配管293被排放至電極容納 室20的外部。又，流入於與電極Ε面對之遮熱材21與電 極Ε之間的冷卻乾燥氣體G3，會將位於遮熱材2 1之與光 源2 2相反的面予以冷卻。 在如以上所構成的電極乾燥裝置3中，由於是使第3 氣體供給裝置兼具第1氣體供給裝置與第2氣體供給裝 置，所以可以將電極乾燥裝置3小型化及低成本化。由於 冷卻乾燥氣體G3具有作爲冷卻氣體也具有作爲乾燥氣體 的功能，所以對於：與電極Ε面對之遮熱材2 1與電極Ε 之間、以及被遮熱材2 1所夾隔並配置有光源22的區域， 可以共通地供給冷卻乾燥氣體G3，因而可以將配管系予 以簡單化。由於流入與電極Ε面對之遮熱材21與電極Ε 之間的冷卻乾燥氣體G3具有搬運蒸氣之作爲乾燥氣體的 功能，並且可以將位在遮熱材21之與光源22相反的面予 以冷卻，所以可以減低從光源22對電極Ε的傳熱，而提 高防止電極Ε之熱劣化的效果。 再者，藉由配置有：光源群22 1a及光源群22 1a用遮 熱材、光源群22 1 b及光源群22 1 b用遮熱材，可以謀求比 第1實施形態更佳之電極兩面之乾燥度的均等化。 -24- 201144730 又，本發明的技術範圍並非受上述實施形態所限定。 在沒有脫離本發明之主旨的範圍內是能夠有各種的變形。 例如’作爲光源者，並非僅限於鹵素燈，由於只要是對於 水分乾燥上能夠充分輻射出紅外線光者，是可以從各種發 光原理的物具中適當地選用，所以例如也可以使用LED。 又對於從光源所射出之光的波長，只要至少可以將紅外線 光予以輻射者，並沒有特別地限定。 【圖式簡單說明】 第1圖，是二次電池之構成例的立體分解圖。 第2圖，是槪略性地顯示二次電池之製造方法之一例 的流程圖。 第3圖，是第1實施形態之電極乾燥裝置其槪略構成 的模式圖。 第4圖，是位於第1實施形態之電極乾燥裝置中之氣 體的流通路徑的模式圖。 第5圖，是從上觀察電極乾燥裝置的斷面圖。 第6圖，是以微觀方式來說明電極乾燥方法的圖面。 第7圖，是水的光吸收光譜的曲線圖。 第8圖，是第2實施形態之電極乾燥裝置其槪略構成 的模式圖。 【主要元件符號說明】 1 :二次電池（電池） -25- 201144730 2、3 :電極乾燥裝置 1 0 :電池容器 1 1 :正極端子 1 2 :負極端子 13 :正極板（電極） 13a :正極突片 14 :負極板（電極） 1 4 a :負極突片 1 5 :隔板 20 :電極容納室 21、21e〜21η:遮熱材 2 1 a :第1遮熱材 2 1 b :第2遮熱材 2 1 c :第3遮熱材 2 1 d :第4遮熱材 2 2 :光源 22a :第1光源群（第1光源） 22b :第2光源群（第2光源） 22c :第3光源群（第3光源） 22d〜22g :光源群 23a、23b :電極捲筒 24a〜24g、241〜244:搬運滾子 2 5 a〜2 5 g :光源容納室 26 :第1氣體供給裝置 -26- 201144730 27 :第2氣體 31 :第3氣體 2 8 :排氣裝置 32 、 291〜293 、 33、33c 〜33h : 3 3 a :第1電極 33b :第2電極 2 9 4 ' 295 ：分關 E :薄片狀的電 G 1 :冷卻氣體 G2 :乾燥氣體 G 3 :乾燥冷卻！ Η :熱 IR :紅外線光 Q :水分 专給裝置 专給裝置 2 9 6 :配管 電極搬運區域（電極搬運路徑） 搬運區域（電極搬運路徑） 搬運區域（電極搬運路徑） i板 極 體 -27-201144730 VI. [Technical Field] The present invention, It is an electrode drying device for drying the electrode" (this application, It is based on the priority of 2009-292056 of Japan on December 24, 2009 and uses its contents. [Prior Art] In the past, as a battery, I know that there is a battery or a secondary battery. In recent years, As one of the secondary batteries, Lithium ion secondary battery Attention. Lithium ion secondary battery, Compared to other batteries such as lead batteries, Has: Can achieve higher voltage, High energy density, The library rate is more than the smell. Lithium ion secondary battery, For example, in the container for storing the electrolytic solution, the positive electrode is separated from the negative electrode by a separator interposed therebetween, and is accommodated. Is coated with a positive active material on the current collector, The negative electrode is a negative electrode active material coated on a current collector. Outside the container, With a positive electrode connected to the positive pole, And a negative terminal connected to the negative electrode. An electrode such as a positive electrode or a negative electrode, It is formed by applying an electrode active material (a positive electrode active material or a negative electrode active material) as a current collector of a base material (for example, Patent document 1, 2 ). The flaky pole formed, By punching into the desired electrode shape, Then house the pool container. For example, a lithium ion secondary battery, etc. The electrolyte is the electrode of a non-dissolved water electrolysis cell, No matter which method is used to make it, In the application for secondary power, it is subject to the secondary efficiency department. The positive electrode has an extreme sheet. The electricity is supplied to the inside of the 201144730 battery container. The electrodes must be highly dry. This is because when there is moisture attached to the electrode, Especially when the electrode active material (positive electrode active material or negative electrode active material), The electrolyte component reacts with moisture to cause deterioration of the battery. As a method of drying the electrode, It is known that there is a method of evaporating water by heating, Or a method of evaporating water under a reduced pressure environment. Drying of the electrode, Generally, during the application of the electrode active material to the shape of the electrode, The moisture enthalpy of the electrode active material is not sufficiently dried. [PRIOR ART DOCUMENT] [Patent Document 1] Japanese Laid-Open Patent Publication No. 2001-23630 [Patent Document 2] Japanese Laid-Open Patent Publication No. Hei 11-67220 Heating method such as hot line, Although it is very easy to increase the drying speed, However, there is a flaw in the thermal deterioration of the electrode. also, a heating method by decompression, Since no heat source is used, Therefore, the thermal deterioration of the electrode can be avoided. However, it takes a long time to dry and therefore has a low productivity. So, In the conventional electrode drying method, It is difficult to prevent the electrode from being thermally deteriorated while efficiently drying the electrode. this invention, It was created in view of the above circumstances, Its purpose is to provide 201144730 which can prevent deterioration of the electrode when it is dried. Further, an electrode drying device which can efficiently dry the electrode can be used. [Technical means for solving the problem of the invention] The electrode drying device of the present invention, The system has: The first light source, It can emit infrared light, And a flat first heat shield, It can pass through the above-mentioned infrared light, And the first gas supply device, Cooling the first gas and supplying the cooling gas, And the second gas supply device, Drying the second gas and supplying the dry gas, And the first electrode carrying area, And let the above cooling gas flow in: Between the first light source and one of the surfaces of the first heat shielding material, Let the above dry gas flow in: The first electrode transporting region on the other surface of the first heat shielding material. In this way, The infrared light from the light source can be illuminated: Moisture adhering to the electrode carried by the first electrode carrying region, Evaporation of moisture is promoted by absorbing water by infrared light. also, Since the dry gas supplied from the second gas supply device can be made to flow into: The first electrode carrying region on the other side of the first heat shielding material, So it can promote: Evaporation of moisture adhering to the electrode carried by the first electrode transporting region. Furthermore, since the heat transfer from the first light source toward the electrode is blocked by the heat shielding material, Therefore, the heating of the electrode can be reduced. Between the first light source and the surface of one of the first heat shielding materials, Flowing into the cooling gas supplied from the first gas supply device, Therefore, it is possible to reduce the heat of the electrode by the first light source and to be heated. As mentioned above, When the electrode is dry, Can significantly reduce the heat of the electrode, And significantly promotes the evaporation of moisture attached to the electrode, Therefore, it is possible to prevent the deterioration of the electrode while 201144730. At the same time, the electrode can be dried efficiently. [Effect of the Invention] The electrode drying apparatus according to the present invention can significantly promote evaporation of moisture attached to the electrode. And significantly reduces the heating of the electrodes, Therefore, the thermal deterioration of the electrode can be prevented. And the electrode can be dried efficiently. [Embodiment] [Forms used in the invention] Embodiments of the present invention will be described with reference to the drawings. In the drawings used in the description, In order to make the parts of the features easy to display clearly, Sometimes it will make the construction size or scale in the drawing. Different from the actual construction. In the embodiment, for the same constituent elements, Will be marked with the same symbol, The detailed description is omitted. Before the description of the electrode drying device is performed, A configuration example of the battery will be described with reference to Fig. 1 at the same time. As shown in Figure 1, As a secondary battery 1 as an example of a single battery, The system contains: Battery container i 〇, The positive terminal 1 1 and the negative terminal 1 2 are electrode terminals. Secondary battery 1, For example, it is a secondary battery of a non-aqueous electrolyte such as a lithium ion secondary battery. Battery container 1 0, For example, it is a hollow container made of aluminum. The battery container of this example 1 〇 , Although its outer shape is roughly angular (substantially rectangular), However, the shape is cylindrical. Positive terminal 11 and negative terminal 12, One is placed on the outer surface of the battery container 10 each. -8 - 201144730 inside the battery container 10, A positive electrode plate 13 and a negative electrode plate 14 as electrodes are housed. Positive plate 13, It is disposed opposite to the negative electrode plate 14. Positive electrode plate 13 and negative electrode plate 14, The configuration is repeated in directions opposite to each other. A partition plate 15 is disposed between the positive electrode plate 13 and the negative electrode plate 14 . The positive electrode plate 13 is made not in contact with the negative electrode plate 14. Positive electrode plate 13 and negative electrode plate 14, A sheet-like current collector such as a conductor foil or a conductor sheet is used as a base material. Further, a coating of an electrode active material corresponding to the electrolytic component is applied to the surface of the base material. Separator 1 5, For example, it is made of an insulating material such as a resin film. At the end on the negative electrode terminal 12 side of the negative electrode plate 14, A negative electrode tab 14a is formed. The negative electrode tabs 14a of all of the plurality of negative electrode plates 14 that are repeatedly arranged are electrically connected to the negative electrode terminal 12. At the end of the positive terminal 1 1 side of the positive electrode plate 13, A positive electrode tab 1 3 a is formed. The positive tabs 1 3 a of all of the plurality of positive plates 13 are repeatedly electrically connected to the positive terminal 1 1 . Inside the battery container 10, An electrolytic component containing lithium ions existing in contact with the positive electrode plate 13 and the negative electrode plate 14 is stored. As a storage form of the electrolyte component, For example, the electrolytic solution containing the electrolytic component may be stored in the inside of the battery container 1 . It is also possible to store the solid matter containing the electrolytic component in the inside of the battery container 10. As a typical electrolyte, A solution in which a lithium salt such as lithium hexafluorophosphate or lithium tetrafluoroborate is dissolved in an organic solvent such as ethylene carbonate or ethyl carbonate can be mentioned. When there is moisture in the non-aqueous electrolyte solution, Since the electrolyte reacts with moisture or causes the electrolyte component to be unstable, etc. -9 - 201144730 will cause electrolyte deterioration. In this view, An electrode such as a positive electrode plate 13 or a negative electrode plate It must be highly dried during the process of being housed in the battery container 10 (for example, The moisture content is in a weight ratio of 10 ppm or less. Secondly, An electrode drying apparatus according to the first embodiment will be described with reference to Figs. 2 to 5 . Figure 2, Is a flow chart that schematically shows an embodiment of a battery manufacturing method; Figure 3, A schematic view showing a schematic configuration of the electrode drying device 2 of the first embodiment; Figure 4, a schematic diagram of a flow path of gas inside the electrode drying device 2; Figure 5, It is a sectional view of the electrode drying device as seen from above. As shown in Figure 2, When manufacturing the secondary battery 1 as an example of a battery, In step S1, An electrode active material is applied to a sheet-like current collector as an electrode base material, A sheet-like electrode is formed. then, In step S2, the film of the electrode active material is pressed against the base material by pressing or the like. The sheet-shaped electrode is dried in step S3. then, In step S4, the positive electrode plate 13, the negative electrode plate 14, and the like are formed by shape-cutting by a blanking (cutting) sheet-like electrode or the like. then, In step S5, Positive electrode plate 13 Separator 1 5 The negative electrode plates 14 are laminated and fixed to each other to form a laminated body. then, After the laminated body is accommodated in the battery container and sealed in step S6, In step S7, the electrolytic solution is injected into the interior of the battery container 1 and then sealed, etc. A secondary battery 1 was produced. Electrode drying device 2, It is used, for example, in step S3 to dry the sheet-shaped electrode. As shown in Figure 3, Electrode drying device 2, The system has: Electrode accommodation -10 - 201144730 Room 20, Heat shielding materials 21a to 21n, Light source groups 22a to 22g, Carrying roller 24a~24g, 241~244, The first gas supply device 26, The second gas supply device 27, And an exhaust device 28. Heat shielding materials 21a to 21n, The light groups 22a to 22g and the transport rollers 24a to 24g' are disposed inside the electrode housing chamber 20. Electrode reel 23a, 23b, The first gas supply device 26, The second gas supply device 27, And an exhaust device 28, It is disposed outside the electrode housing chamber 20. Electrode drying device 2, In short, the action is as follows. a sheet electrode E formed by coating an electrode active material on a sheet-like current collector, After being passed through a press process, it is wound into an electrode roll 23a. Electrode E, Is used as an electrode for batteries, It can be either a primary battery or a secondary battery. here, The electrode for the two batteries shown in Fig. 1 will be described as an example. The electrode E derived from the electrode reel 23a, The transport roller 24 1 which is located outside the electrode chamber 20 and the transport roller 242 which is located inside the electrode storage chamber 20 and which is disposed at the entrance of the sheet-shaped electrode E, Then, it is carried through the inside of the electrode housing 20 along the carrying rollers 24a to 24g. Inside the electrode housing chamber 20, The electrode E is irradiated with infrared light from the light source group 2 2 a 2 2 2 g, The moisture attached to the electrode E or the fraction contained in the electrode active material at the electrode E is evaporated by light absorption. Electrode E, After being carried inside the electrode accommodating chamber 20 while being dried, The inside of the electrode storage chamber 20 passes through the carrying roller 2 4 3 disposed at the discharge port of the sheet electrode E, The transport roller 244 located outside the electrode accommodating chamber is wound into the electrode reel 23b. Each of the moving body source is placed in the sub-chamber of the thin cylinder. The water is in the shape of the water. The direction of rotation of the roller and the conveying direction of the sheet-shaped electrode E are indicated by arrows. the following, The components of the electrode drying device 2 will be described in detail. Inside the electrode housing chamber 20, The plurality of heat shielding materials 21a to 21n are arranged to be separated from each other. Heat shield 21 a~21η, It is a substantially plate-like member having a plate surface facing the Υ-Ζ direction. Heat shielding materials 21a to 21n, It is repeatedly placed in its respective normal direction (X direction). Heat shield 2 1 a~2 1 η, By: The infrared light emitted from the light source groups 22a to 22g can be transmitted through, And materials with lower thermal conductivity, For example, it is made of heat-resistant glass made of quartz. Hereinafter, the heat shielding materials 21a to 21n, From X positive direction to X negative direction in order, Called: First heat shielding material 21 a, The second heat shield 21b, The third heat shielding material 21c, The fourth heat shielding material 21d, The fifth heat shield 21e, The sixth heat shielding material 21f, The seventh heat shielding material 21g, 8th heat shield 21h, The 9th heat shield 21i, The 10th heat shield 21j, The 11th heat shield 21k, The 12th heat shield 211, The 13th heat shield 21m, The 14th heat shielding material 2 1 η 〇 is between the plurality of heat shielding materials 21a to 21η, The light source groups 22a to 22g are disposed. Each of the light source groups 22a to 22g, It is a plurality of light sources arranged in the Y direction. light source, Infrared light containing a mid-infrared light having a wavelength of about 2 #m to 4 Am can be irradiated. light source, As long as it can illuminate infrared light, Even if you emit light that contains visible light. a plurality of light sources, For example, it is constituted by a substantially columnar halogen lamp having an axis in the Z direction. The length of the light source 'in the Z direction is the same as the width of the electrode E, And it is supported by both ends of the Z direction. The light source group is 2 2 a~2 2 g, From X positive direction to X negative direction, -12- 201144730 order, Called: The first light source group 22a, The second light source group 22b, The third light source group 22c, The fourth light source group 22d, The fifth light source group 22e, The sixth light source group 22f, The seventh light source group 22g. Take an integer from 1 to 7 as N, Each of the light sources included in the Nth light source group (N = 1 to 7) is collectively referred to as an Nth light source. An Nth light source group is disposed between the (2xN-1) heat shield and the (2xN) heat shield. In other words, The part surrounded by the (2χΝ·_1 ) heat shield and the (2x Ν ) heat shield, It becomes a first light source accommodating chamber for accommodating the first light source group. E.g, Corresponding to 第 = 1 between the first heat shield 2 1 a and the second heat shield 21 b The first light source accommodating chamber 25a is accommodated in the first light source group 22a. 1st to 7th light source accommodating chambers 2 5 a to 2 5 g, They are arranged in the X direction away from each other. here, In this embodiment, In order to configure 7 light source accommodation rooms, That is, it is set to 1$NS7 (N is an integer). However, the number of N can be changed in response to the dryness requirement. Therefore, In response to the design, It is also possible to arrange more than seven light source housing chambers. The first light source is arranged on the Y axis in the order and on the positive side of the Y axis. The rotation shaft of the first conveyance roller 24a is disposed, Similarly, in the Y-axis in which the third light source is arranged in order and on the positive side of the γ-axis, The rotation shaft of the third conveyance roller 24c is disposed. And respectively on the Y-axis in which the fifth light source is arranged in the order, and on the positive side of the Y-axis, The rotation axis ′ where the fifth transport roller 24e is disposed and the Y-axis arranged in the order of the seventh light source are on the positive side of the Y-axis, The rotating shaft of the seventh transport roller 24g is disposed. In the first to seventh light source accommodating chambers 25a to 25g and the first Third, number 5, And the seventh carrying roller 24a, 24c, 24e, Between 24g, A partition plate 294 is provided. A slit is provided in the partition plate 294. Electrode E, -13- 201144730 can be moved between the light source side of the partition plate 294 and the carrying roller side via the slit of the partitioning plate 294. The second light source is arranged on the Y-axis in the order and on the negative side of the γ-axis. The rotation shaft of the second conveyance roller 24b is disposed, Similarly, in the Y-axis where the fourth light source is arranged in order and on the negative side of the Y-axis, The rotation shaft of the fourth conveyance roller 24d is disposed. and, On the Y-axis in which the sixth light source is arranged in the order, and on the negative side of the Y-axis, The rotating shaft of the sixth carrying roller 24f is disposed. In the first to seventh light source storage chambers 25a to 25g and the second 4' and the 6th carrying roller 24b, 24d, 24f, 242, Between 243, A partition plate 295 is provided. A slit is provided in the partition plate 295. Electrode E, It can be moved between the light source accommodating chamber side of the partitioning plate 295 and the carrying roller side via the slit of the partitioning plate 295. The transport rollers 24a to 24g and the transport roller 242' 243 have a cylindrical shape extending in the Z direction. And the width is wider than the sheet electrode E, And they are supported at both ends in the respective Z directions. The radius of the section of the carrying roller in the XY plane, Is designed to: The electrode sheet E is placed between the wall surface passing through one of the electrode storage chambers and the first light source accommodating chamber, And between the first and second light source accommodating chambers, And between the third and fourth light source accommodating chambers, And between the fifth and sixth light source accommodating chambers, And between the seventh light source accommodating chamber and the other wall of the electrode accommodating chamber 20, It is passed in such a manner as not to contact the light source housing chamber or the wall surfaces. in particular, The radius, Is designed to: It is larger than the distance between the Nth light source and the Nth heat shield or the (N+1) heat shield in the X-axis direction. And the distance between the source and the (2N+1) heat shield or the (2n_2) heat shield in the x-axis direction is smaller than that of the Nth light -14- 201144730. By configuring the divider 294, 295, It is possible to significantly reduce the intrusion of minute debris such as the side of the carrying roller into the light source accommodating chamber side. The electrode E' is hung from the first transport roller 24a in the second transport roller 24b, The third carrying roller 2 4c, The fourth carrying roller 24d, The fifth carrying roller 24e, The sixth transport roller 24f' seventh transport roller 2 4g, In this order, the first to seventh transport rollers 2 4 a to 2 4 g are transported. Electrode E, Each of the first to seventh transport rollers 24a to 24g passes through, Its direction of travel changes by approximately 180 degrees. The snake is carried in the interior of the electrode accommodation chamber 20, At the same time, it is irradiated with infrared light from the light source groups 22a to 22g. in particular, Electrode E, After being carried from the loading port of the electrode storage chamber 20 to the inside, The surface on the opposite side to the surface on the side of the first light source group 22a of the first heat shielding material 2 1 a is The first transport roller 24a is moved toward the positive direction (the first direction) of the Y-axis. At the same time, it is irradiated with infrared light from the first light source group 22a. then, Electrode E, After passing through the first conveyance roller 24a, In the negative direction (second direction) of the Y-axis and toward the second transport roller 241? The ground travels between the second heat shield 21b and the third heat shield 21c. Between the second heat shield 21b and the third heat shield 21c, That is, in the first and second light source accommodation chambers 25a, Between 25b, The surface on the positive side of the X-axis of the electrode E is irradiated with the infrared light from the first light source group 2 2 a. The surface on the negative side of the X-axis of the electrode E is illuminated by the infrared light from the second light source group 22b. -15- 201144730 Shoot. Electrode E, After passing through the second conveyance roller 24b, The second and the first storage chambers 25b are moved in the forward direction toward the third transport roller 24c. Between 25c, At the same time, it is irradiated with infrared light from the second light source and the third light source group 22c. Same as below, Electrode E, Then, the third transport roller travels between the third and fourth light source accommodating chambers 25d in the negative direction of the Y-axis. Then, after passing through the fourth transport roller 24d, the fourth and fifth light source accommodating chambers 25 d are moved toward the Y-axis. Between 2 5 e, the fifth transport roller 24e travels in the negative direction toward the Y-axis, and the sixth light source accommodating chamber 25e, Between 25f, Then, after the sixth sub- 24f, the sixth and seventh optical chambers 25f are moved in the positive direction toward the Y-axis. Between 25g. then, When the seventh transport roller 24g faces the negative direction of the Y-axis and travels toward the transport roller 243, the surface of the 14th heat shield 21n on the side of the seventh light source group 22g is opposite. At the same time, the electrode E is thus carried out by the infrared light from the 7th light source group 2 2 g, The meandering travels between 2 5 a and 2 5 g in the 1st to the accommodating chambers. Since the electrode E travels serpentinely inside the drying device 2, So compared to not making it happen, The surface ensures the length of the path of the electrode E, At the same time, the drying device 2 can be significantly miniaturized. Furthermore, The electrode E is in a state of being meandered while being conveyed, and the infrared light radiated from the adjacent light source storage chamber is divided into one surface of the electrode E and the other surface. therefore, Compared to the 3 source of the light source group 22b 2 4 c after the Y axis: The square of 25c', Then after the 5th carrying roller source is accommodated, One with the illumination on the opposite side. 7 light source, the electrode can be dry, Irradiated separately, only from the surface of -16- 201144730, the infrared light is illuminated. The electrode E can be dried efficiently. Since each of the second to sixth light source groups 22b to 22f, For the electrode E that is transported across the sides of the light source group, The infrared light can be irradiated toward the positive side of the X-axis and the negative side of the X-axis. So you can reduce the number of light sources, The electrode drying device 2 can be made low cost or miniaturized. The first gas supply device 26, It is a device for generating a cooling gas G1 by cooling the first gas such as air or an inert gas (see Fig. 4). The first gas supply device 26, It is connected to the pipe 291. Piping 291, It is branched and connected to one ends of the first to seventh light source storage chambers 25a to 25g. here, The branching pipe ' of the pipe 291 corresponds to the first to seventh light source accommodating chambers 25a to 25g in a one-to-one manner. The other ends of the first to seventh light source accommodating chambers 2 5 a to 2 5 g, It is connected to the pipe 2 9 6 . Piping 296, It is branched and connected to the other ends of the first to seventh light source storage chambers 25a to 25g. As shown in Fig. 4, the cooling gas G1 supplied from the first gas supply device 26, The inside of the first to seventh light source accommodating chambers 25a to 25g flows through the pipe 291. Cooling gas G1, In the positive direction of the first to seventh light source accommodating chambers 25a to 25g in the positive direction toward the Y-axis, and then at the end on the positive side of the Y-axis of the first to seventh light source accommodating chambers 25a to 25g, It is discharged from the inside of the first to seventh light source storage chambers. The cooling gas G 1 ' discharged from the inside of the first to seventh light source storage chambers 2 5 a to 2 5 g includes, for example, a gas having a smaller dryness than the second gas to be described later, as well. The piping 296 is passed in such a manner as to have less influence on the electrode E. Then, it is discharged from the vicinity of the exhaust pipe -17-201144730 29 3 provided on the wall surface of the electrode accommodating chamber 20. Then, the cooling gas G1 discharged to the vicinity is discharged to the outside of the electrode storage chamber 20 via the piping 293 by the exhaust device 28. With this, When the dryness of the cooling gas G 1 is smaller than that of the dry gas G2, It is possible to prevent the cooling gas G1 from coming into contact with the electrode E to cause the moisture of the cooling gas G1 to adhere to the electrode E. The second gas supply device 27' is a device for drying the second gas such as air or an inert gas to generate the dry gas G2. The second gas, The gas which is the same as the first gas may be a different gas. The moisture content of the dry gas G2 is based on the moisture content of the electrode E after drying. That is, it is set according to the target of the degree of dryness. The second gas supply device 27, Is connected to piping 292, The pipe 292 is electrically connected to the inside of the electrode accommodating chamber 20. The dry gas G2 supplied from the second gas supply device 27, It flows into the inside of the electrode storage chamber 20 through the pipe 292. The dry gas G2 flowing into the inside of the electrode accommodating chamber 20, Flowing in the range of the partition plate 294 and the partition plate 295, Between the first to seventh light source accommodating chambers 25a to 25g, That is, the transport path into the electrode E" Specifically, As shown in Figure 5, Piping 292 is extended to: The side surface in the electrode drying device 2 of the electrode E is avoided. and, Piping 2 92, Between the light source accommodating chambers, A plurality of gas inlets for flowing into the drying gas G2 from the first to seventh light source accommodating chambers 25a to 25g corresponding to the respective transport paths 33a to 33h of the electrode E are provided. The drying gas G2 passing between the first to seventh light source accommodating chambers 25a to 25g, The cold gas -18-201144730 discharged from the inside of the first to seventh light source accommodating chambers 25a to 25g is merged with the gas G1. It is discharged to the outside of the electrode accommodating chamber 20 via the piping 293 by the exhaust unit 28. here, It is also possible to form a structure in which the pipe 2 9.6 and the pipe 2 9 3 are directly connected. Further, an exhaust device for the dry gas G2 without the surface is provided. The piping is inserted into the electrode accommodating chamber 20. That is, The exhaust device for the cooling gas G1 and the exhaust device for the dry gas G2 may be provided separately. By doing so, In the case where the cooling gas G1 and the drying gas G2 are different gases, it is possible to avoid the problem that the gases are mixed with each other and the heat is generated by the chemical reaction. also, If the dryness of the cooling gas G 1 is smaller than the dry gas G2, It can be better avoided: The cooling gas G1 is in contact with the electrode E, and the moisture of the cooling gas G1 is adhered to the electrode E. also, Exhaust device 28, Since the cooling gas G1 and the drying gas G2 are exhausted, the inside of the electrode housing chamber 20 can be decompressed. Therefore, the moisture attached to the electrode can be removed more effectively. Secondly, The microscopic manner is used to illustrate how the electrodes traveling between adjacent light source receiving chambers are dried. Figure 6, An explanatory diagram illustrating the electrode drying method in a microscopic manner; Fig. 7 is a graph showing the light absorption spectrum of water. As shown in Figure 6, Between the light source accommodating chambers 25, The electrode E is irradiated with the infrared light 1R from the light source 22. The moisture Q attached to the electrode E or the moisture Q contained in the electrode active material of the electrode E, The temperature is raised by absorbing the infrared light IR. As shown in Figure 7, Light absorption spectrum of water, In the wavelength region of the mid-infrared, In particular, the wavelength region of 1 · 7 /z m~3 · 4 # m -19- 201144730 There is an absorption peak in the domain. therefore, Infrared light 1R can be absorbed efficiently by moisture Q. The moisture Q is effectively heated. Heat shield 2 1, Since it is formed of a material that can efficiently transmit infrared light, Therefore, the moisture Q contained in the electrode E decomposes after absorbing the infrared light. evaporation. E.g, When the heat shield material 2 1 is a transparent quartz glass having a thickness of 1 mm to 10 mm, the transmittance of the medium infrared ray is 90%. Therefore, when a halogen lamp is used as the light source 22, the infrared light from the light source 22 can be irradiated to the moisture Q' with high intensity so that the moisture Q is efficiently evaporated from the electrode E. The vapor 'generated by the evaporation of the moisture Q is carried out to the outside between the light source accommodating chambers 25 along with the dry gas G 2 , It is discharged to the outside of the electrode accommodating chamber 20 by the venting means 28. Since the evaporated water is immediately carried out by the dry gas G 2 ', it is possible to prevent moisture from adhering to the electrode E again. also, In order to increase the heat insulating effect of the heat insulating material 21, it is possible to increase the thickness, but since the transmittance is also lowered as the thickness is increased, In view of the miniaturization and drying efficiency of the device, when the heat shielding material 21 is a transparent quartz glass, The thickness is preferably 4 m m or more and 10 m m or less. The heat H' radiated by the light source 22 is shielded by the heat shield 21 to prevent the heat from the light source 22 from being directly transmitted to the electrodes. The cooling gas G1 passing through the inside of the light source housing chamber 25 is attracted by the exhaust device 28. , The heat generated at the light source 22, The cooling gas G1 is used as a refrigerant to be transported toward the outside of the light source accommodating chamber 25, and the heat conducted to the heat shielding material 21 is reduced. also, The heat shield 21 has always been a material having a low thermal conductivity, so -20- 201144730 is in the heat shield 2 1 From the side of the inner side of the light source accommodating chamber 25, The amount of heat conducted toward the surface on the side of the electrode E in the conveyance becomes smaller. that is, The heat radiated from the heat shield 21 to the second electrode E becomes smaller. however, An electrode used in a lithium ion secondary battery or the like, It is easy to cause thermal deterioration. For example, when exposed to temperatures above 1 30 ° C for a long time, This will cause a drop in characteristics. Let the water evaporate without raising the temperature of the electrode. As long as you are not using a heat source, Allow the electrode to dry in a vacuum environment. however, Drying it in a vacuum environment will cause the drying time to be extended to a long time (for example, several hours to ten hours). This results in a decrease in the efficiency of electrode fabrication. When the processing chamber for drying (for example, a vacuum processing chamber) is enlarged, Will cause the cost of the device to rise, Therefore, it is difficult to increase the efficiency of the drying process by increasing the size of the device. In the electrode drying device 2, Since the electrode E is irradiated with the infrared light 1R, So you can selectively heat the moisture Q, The temperature rise of the electrode E is reduced. The heat from the light source 22 (the light source groups 22a to 22g) is prevented from being directly transmitted to the electrode Ε, Since it is prevented by the heat shielding material 21 (21a to 21n), Therefore, the temperature rise of the electrode crucible can be reduced. Since the secondary heat radiated from the heat shield 21 is avoided, Therefore, the temperature rise of the electrode crucible due to the secondary thermal radiation is reduced. So, Since the temperature rise of the electrode crucible is remarkably lowered, Therefore, thermal deterioration of the electrode crucible can be prevented. also, Because it is irradiated with infrared light IR, Therefore, the moisture Q can be heated efficiently. And the moisture Q is evaporated efficiently. Since the vapor from the moisture Q is carried and removed from the periphery of the electrode crucible by the dry gas G2, Therefore, the moisture Q can be efficiently evaporated. The inside of the electrode housing chamber 20 can be made into a decompressing environment by the exhaust device -21 - 201144730 28 Therefore, the evaporation of the moisture Q can be further promoted. So, Since the evaporation of moisture Q is significantly promoted, Therefore, the electrode E can be dried efficiently as described above, According to the electrode drying device 2, It is possible to prevent thermal deterioration of the electrode E while preventing The electrode E is dried efficiently and efficiently. the result is, It is possible to efficiently manufacture the electrode E having good characteristics at low cost, Moreover, it is possible to efficiently manufacture a battery having good characteristics at low cost. Secondly, An electrode drying device according to a second embodiment will be described. The electrode drying device of the second embodiment, The second gas supply device includes the first gas supply device. In other words, In contrast to the first embodiment, it is provided with: a third gas supply device having both functions of the first and second gas supply devices, Supplying the dried and cooled dry cooling gas from the third gas supply device; and also, It is arranged so as to sandwich the conveyance path 33a together with the first light source storage chamber: The light source group 22 1a and the light source group 22 1a which are the same as the first light source group are made of a heat shielding material. And configured to sandwich the transport path 33h together with the seventh light source accommodation chamber: The light source group 221b and the light source group 221b which are the same as the seventh light source group are made of a heat shielding material. Figure 8, A schematic view showing a schematic configuration of the electrode drying device 3 of the second embodiment. As shown in Figure 8, Electrode drying device 3, The harness is equipped with: a third gas supply device 3 1 including the functions of the first gas supply device and the second gas supply device, And a pipe 3 2 that is connected to the third gas supply device 3 1 and that is electrically connected to the inside of the electrode storage chamber 20 . Third gas supply device 3 1, Is used to supply: A gas which is appropriately selected such as air or a non-active gas is cooled and dried by cooling -22-201144730 but dry gas G3. Cooling the dry gas G3, It is supplied to the inside of the electrode accommodating chamber 20 through the pipe 3 2 . The gas supplied from the third gas supply device 3 1 , It is a gas which is at least one (same component) after being cooled and dried. If it is a gas that does not react with each other, Two or more kinds of gases which have been cooled and dried may be supplied from the third gas supply device 31 in a state of being mixed. In this embodiment, The plurality of light sources 22 are juxtaposed in the Y direction to form a light source group. The plurality of light source groups are arranged apart from each other in the X direction. Thin sheet electrode E, In the same manner as in the first embodiment, Snakes are carried between the light source groups. also, The light source group is arranged so that the front and back sides of the electrode E carried by the meandering can be uniformly irradiated. The transport path of the electrode E in the positive direction of the Y-axis or the negative direction of the Y-axis, A heat shield 2 1 is disposed between the conveyance path and the light source 22 . In this embodiment, An area surrounded by two heat shielding materials 21 and configured with a light source 22, Is at the end of the Y-axis of the heat shield 21 in the positive and negative direction, It is electrically connected to the inside of the electrode accommodating chamber 20. An area (transport path) in which the light source 22 is not disposed between the two heat shielding materials 21, Is at the end of the Y-axis of the heat shield 21 in the positive and negative directions, It is electrically connected to the inside of the electrode accommodating chamber 20. a part of the cooling dry gas G 3 supplied to the inside of the electrode housing chamber 20, It will flow into the area surrounded by the heat shield 2 1 and configured with the light source 22, The function as the cooling gas of the first embodiment is produced. that is, Cooling dry gas G 3, After the surface of one of the heat shields 21 facing the electrode E transport path or the heat is removed from the light source 22, the flow passes therethrough. It is discharged to the outside of the electrode housing -23-201144730 room 20 via the piping 2 9 by the exhaust unit 28. also, a part of the cooling dry gas G3 supplied to the inside of the electrode housing chamber 20, Will flow between the heat shield 21 and the electrode Ε facing the electrode ,, The function as the dry gas of the first embodiment is produced. That is, the 'cooling and drying gas G3 flows along with the water evaporated from the electrode crucible, The exhaust device 28 is discharged to the outside of the electrode housing chamber 20 via the pipe 293. also, a cooling dry gas G3 flowing between the heat shield 21 and the electrode Ε facing the electrode ,, The surface of the heat shield 2 1 opposite to the light source 2 2 is cooled. In the electrode drying device 3 constructed as above, Since the third gas supply device has both the first gas supply device and the second gas supply device, Therefore, the electrode drying device 3 can be miniaturized and reduced in cost. Since the cooling dry gas G3 has a function as a cooling gas as a cooling gas, So for: Between the heat shield 2 1 and the electrode Ε facing the electrode 、, And an area surrounded by the heat shielding material 21 and configured with the light source 22, The cooling dry gas G3 can be supplied in common, Therefore, the piping can be simplified. The cooling dry gas G3 flowing between the heat shield 21 and the electrode Ε which faces the electrode 具有 has a function of transporting the vapor as a dry gas, And the surface of the heat shield 21 opposite to the light source 22 can be cooled. Therefore, the heat transfer from the light source 22 to the electrode turns can be reduced. This improves the effect of preventing thermal deterioration of the electrode crucible. Furthermore, With the configuration: The light source group 22 1a and the light source group 22 1a are made of a heat shielding material, The light source group 22 1 b and the light source group 22 1 b are covered with heat shielding materials, It is possible to achieve equalization of the dryness of both surfaces of the electrode, which is better than the first embodiment. -24- 201144730 Again, The technical scope of the present invention is not limited by the above embodiments. Various modifications can be made without departing from the spirit and scope of the invention. For example, as a light source, Not limited to halogen lamps, As long as it is sufficient for the moisture to dry out, it can radiate infrared light. It can be appropriately selected from the materials of various light-emitting principles. So for example LEDs can also be used. And for the wavelength of the light emitted from the light source, As long as at least the infrared light can be radiated, It is not particularly limited. [Simple diagram of the diagram] Figure 1, It is an exploded perspective view of a configuration example of a secondary battery. Figure 2, It is a flowchart which shows an example of the manufacturing method of a secondary battery. Figure 3, Fig. 1 is a schematic view showing a schematic configuration of an electrode drying apparatus according to the first embodiment. Figure 4, It is a schematic view of a flow path of a gas in the electrode drying device of the first embodiment. Figure 5, It is a sectional view of the electrode drying device viewed from above. Figure 6, The surface of the electrode drying method is described in a microscopic manner. Figure 7, It is a graph of the light absorption spectrum of water. Figure 8, Fig. 1 is a schematic view showing a schematic configuration of an electrode drying apparatus according to a second embodiment. [Main component symbol description] 1 : Secondary battery (battery) -25- 201144730 2 3 : Electrode drying device 1 0 : Battery container 1 1 : Positive terminal 1 2 : Negative terminal 13 : Positive plate (electrode) 13a : Positive tab 14 : Negative plate (electrode) 1 4 a : Negative electrode tab 1 5 : Partition 20 : Electrode housing chamber 21, 21e~21η: Heat shield 2 1 a : 1st heat shield 2 1 b : 2nd heat shield 2 1 c : 3rd heat shield 2 1 d : 4th heat shield 2 2 : Light source 22a: First light source group (first light source) 22b : Second light source group (second light source) 22c : Third light source group (third light source) 22d to 22g: Light source group 23a, 23b : Electrode reels 24a~24g, 241~244: Carrying roller 2 5 a~2 5 g : Light source housing room 26 : First gas supply device -26- 201144730 27 : Second gas 31 : 3rd gas 2 8 : Exhaust device 32, 291~293, 33. 33c ~ 33h: 3 3 a : First electrode 33b: Second electrode 2 9 4 ' 295 : Divided E: Flaky electricity G 1 : Cooling gas G2 : Dry gas G 3 : Dry and cool! Η : Thermal IR: Infrared light Q : Moisture-specific device Specialized device 2 9 6 : Piping Electrode transport area (electrode transport path) Transport area (electrode transport path) Transport area (electrode transport path) i-plate polar body -27-