200836444 九、發明說明： 【發明所屬之技術領域】 本發明關於-種密閉型電池之安全閥，更詳言之關於— 種組合容易進行易破裂部之強度調節之連續或半連續的 閥體環形狀及各種易破裂部剖面形狀的密閉型電池之安 全閥。 - 【先前技術】 馨在鐘離子電池等中，在電池内部由於某些原因產生異常 反應’而使電池内部壓力上升的情況時，在密閉型電池中 =由於電池本㈣爆炸而產生對人、物的損害。作為其 對朿，需要在達到爆炸之前放出電池内部的氣體，因此 般在電池外裝部具有安全閥。 。亥安王閥具有以預先没計準備的内麼而破裂開放的閥 體，在該閥體所要求的特性上，開放壓力當然比通常 池内部壓力高，但從安全上考慮希望是盡可能低的開放遷 籲力（有時將該臨界開放壓力稱為作動壓而且，在電池 内部的氣體產生量多時，若放出該氣體的闕體面積小，則 電池内部壓力暫時增加而存在達到爆炸的危險。 、 因此’因易破裂溝的破裂而產生的氣體放出部的面積具 有足以放出產生氣體量的面積是非常重要（根據我們的: 驗需要7咖2以上另外，該鐘離子電池由於用於攜帶型 電話或數位相機等，因此因操作使用者將其掉落在地上或 地板上使閥體部破損，而有電解液洩漏等可能性。因此' 對於這種意外落下，閥體不易損傷是非常重要（將此稱為 312XP/發明說明書(補件)/97.〇2/9614〇21〇 200836444 落下強度）。 為了如上所述的目的嗜離子電池具有安全閥 機構。該安全關呈古+ 為女王 該箄人 二 电池側面和底部透過直線或曲線或 〜、、、、且δ而由寬度2_以下的衝壓或姓刻來構 體的情況（稱為刻印型或衝麗闕）、以及在封口板上設^ :亚在此處形成薄的闕體的情況。該閥體的平面形狀 壬、圓、橢圓或飲料罐的易開罐蓋或其集合體之 狀0 、j〜 作體蓋的剖面ν缺口刻印型的安全閥，無法將 =壓设置為·gf/cm2以下’又無法確保氣體放出時之 充開口面積’所以對落下較弱，因此逐漸不被使用。 、作為在封Π板上設置開放口並在此形成薄的閥體的手 段具有如下手段’即最初在封口板面内穿開具有既定大小 的開放孔，利用包覆（clad)或溶接將厚度20〜叫的薄膜 作為閥體貼附到該開放孔上（一般將此稱為包覆閥）。另 外，亦有在封口板面内透過衝壓或蝕刻等來形成且有既定 大1薄膜之安全閥的手段（一般將此稱為衝壓閥1。 前者包覆閥雖然具有保持作為安全閥的要求特性的低 作動壓、寬廣的放出面積及強力的落下強度之優點，但是 需要衝壓三次與包層步驟等製造步驟較為複雜，且製造2 術難且良率差，因此存在成本高的負面缺點。 對此’衝壓閥由於可以僅透過衝壓（包括分型模衝壓） 在封口板内面形成閥體，因此可廉價地製作。又，能夠容 易確保足以放出氣體之既定大小以上的安全閥面積，但是 312xp/發明說明書(補件)/97-02/96140210 6 200836444 與包覆閥比較時，難以得到穩定的低作動壓。 因此，衝壓閥的開發一般透過衝壓裝置的精密下死點控 制和適合材料的改良開發來進行。上述兩者正由衝壓裝置 製造商與閥體材料製造商開發。而且，在生產作為闕體之 封口板的衝壓製造商和使用此的電池製造商中，開發者著 力於透過對衝壓閥之形狀下功夫來得到所需之低作動麗 之衝壓閥，也有不少發明專利提出了中請，但是目前尚未 達到可得到％定且足夠低的作動壓的程度。 如日本專利特開平u_27364〇所示，在封口板2之開放 口 21上形成呈圓頂狀的薄壁閥體23，在該閥體$的周圍 附=成易破裂溝。-般，在封口板上設置平面連續或不 連、、貝％ I的薄壁部’並在該薄壁部形成破裂溝之類型的安 王閥中’在電池内部壓力上升時，透過薄壁之閥體受到電 池内=之壓力而變形來使安全閥作動，因此以比較低的壓 力使安全_動’達到本來的目的（參照專利文獻1)。 又，如日本專利特開綱5_135873號之圖2⑻所示， 内：：：6上形成有薄壁的閥體，在該閥體上形成朝電池 周緣ϊίΓί少—個圓頂部2，在上述圓頂部的至少一個 ❹易使閥體破裂的破裂溝4，如此一般變 二㈣Γίί:體:Γ附近，隨著朝閥體周緣部 電池内邱= 溝位於閥體的周緣，因此在 (夫…t升時’會位於在闊體内部變形最小的地方 (參妝專利文獻2)。 在日本專利特公昭58_23165中，記载有利用單向剪切 312ΧΡ/發明’月書(補件)/97•嶋⑽咖 7 200836444 加工及往復方向剪切加工之容易分離的金屬片連續體之 ‘造方法（習知技術）（參照專利文獻3 )。 (專利文獻1 )日本專利特開平U —27364〇 (專利文獻2 )日本專利特開2〇q5-135873號 (專利文獻3 )日本專利特公昭— 【發明内容】 - (發明所欲解決之問題） 在習知技術中，對於密閉型電池，尤其是鋰離子電池等 之女王閥，在二洋電機、miyamatool等中已進行開發、 改良且一部份已實際應用。 。但是’通常在落下等比較輕的衝擊和設想内的低内壓下 壬現穩定且不容易開口 ’另一方面在内壓急劇上升時破實 開口而能防止破壞之高安全性的密閉型電池之安全閥目 前尚未充分商業化。 (解決問題之手段） ❿ 根據本發明，可提供如下安全閥： -種密閉型電池之安全閥’伴隨環境異常變化產生異常 •氣體，而會導致溝内氣體壓力之急劇上升；其特徵在於， 具有與平面連續或不連續環形之㈣易破裂溝大致正交 ”月外=延伸的大致徑向易破裂溝’對於溝整體之意外落 下等不容易破裂，另-方面，對於因溝内異常氣體之產生 引起的内壓上升’可以按照設計之較低内壓破裂而釋放内 左（申睛專利範圍第1項）； 如申請專利範圍第i項之密閉型電池之安全闕，其中， 312XP/發明說明書(補件 V97-02/96140210 8 200836444 大致t向易破裂溝剖面為y 裂溝或往復剪切加工型易破列、、盖型易破 圍第2項）； $破衣溝之任思-種（中請專利範 易Π 圍第2項之密閉型電池之安全閥，1中， 易破裂溝之交點為以下的組合·· /、中 G)v缺口型易破裂溝間之組合； (2)V缺口型易破裂溝和單向剪切 工型易破裂溝之組合； 尘次在设男切加 ⑶單向剪切加工型易破裂溝間之組合； ⑷往復剪切加卫型易破裂溝間之組合；和 溝(二剪:二工型易破裂溝和往復剪切加工型易破裂 溝。（申凊專利範圍第3項）；以及， 八m範圍第1至3項中任一項之密閉型電池之安 =广向易破裂溝之殘厚“時，安全闕部板厚T 項）。）（ti ’ w (中請專利範圍第4 (發明之作用效果） 透過實施以上本發明，提供一種在對電池進行封口的板 狀封口板之開放孔上形成有薄壁閥體，且電池内㈣= 到既定值以上時，上述閥體其周緣部—部分或全部破裂而 將電池之氣體朝電池外放出的電池之安全閥，閥體形狀為 固形、橢ϋ形或四邊形等形狀#任意的封_形狀（連續 或不連續環形或中空放射狀），破裂溝位於從閥體之周緣 312ΧΡ/#ζ§|^0§^(^φ)/97.〇2/9614Ο210 〇 200836444 離開之處，因此可得到以較小的力引起變形之效果。 又，由於從中央破裂溝沿大致垂直方向朝閥體周緣部， 具有例如4條以上大致放射狀之輔助破裂溝，因此在與破 裂溝之父點（易破裂溝間之交點）集中應力，所以在低壓 力亦會開始斷裂，又若一旦開始破裂，則與朝電池之外侧 方向的壓力不同，破裂溝透過辅助破裂溝亦受到朝電池侧 •面方向之壓力。即，破裂傳播（crack propagation)以較 ，小的壓力進行。因此如上所述，與習知衝壓閥相比，可得 _到非常低之作動壓。 本舍明之衝壓閥包括在局部利用V缺口型易破裂溝間 或單向或往復剪切加工易破裂溝或該等組合，由在利用以 大致直角之父點作為破裂之出發點的破裂傳播（crack propagat i on )並以易破裂溝間之交點作為破裂開始點的 易破裂溝中呈現連續之破裂片連續體所構成的閥體。 其中單向剪切加工易破裂溝（lway shearing easy 〇pen ⑩ditch，1WAY SEOD)或往復剪切加工易破裂溝（2way shearing easy open ditch; 2WAY SE0D)分別以使用了如 圖2、圖3和圖4、圖5所記載之分型防皺模之處理來製 作，只用中心部之經加工硬化的殘存連接部進行連接。圖 3和圖4分別所示之殘存連接部分尤其差排密度高，且經 加工硬化，所以較脆且容易產生裂痕，容易破裂。任一者 均因鮑辛格效應（bauschinger effect)而容易破裂、斷 裂。 另外，本發明中之所謂破裂是指，在易破裂部，例如塑 312XP/發明說明書(補件)/97-02/96140210 10 200836444 性加工密度高且破壞時容易集中應力的破裂溝之交點或 其附近，首先透過内壓產生裂冑，並且裂冑沿著破裂溝傳 播而產生閥體之破裂，而將内部之高壓氣體排出於大氣中 之現象，實際上一般破裂片（閥體）之一部分被卷起來， 而破裂溝之一部分（主要為延性變形部）不會斷裂而殘 存。由該特性，可防止因破裂時分離閥體之飛散引起的危 . 險。 鲁另外，當開始破裂時，從破裂溝與輔助破裂溝之交點開 始產生裂痕，被兩個輔助破裂溝及與該等大致正交之破裂 溝所包圍的部分朝電池之外侧方向折彎，因此在閥體作動 時可確保充分的用於放出氣體之面積。 另外，依習知例1、2和本發明實施例丨、2之順序用同 一厚度、同一材料（軟鋼板或耐蝕A1合金板）進行比較 時’當比較其作動壓YA、YB、YC、γ])則為γΑ>γΒ>γ〇 YD ° • 如上所述，閥體透過電池外侧方向和侧面方向之兩方向 力而破裂，因此在與通常之衝壓閥進行比較之場合時，在 •設計作動壓相同時可以將易破裂溝及輔助破裂溝之厚度 形成較厚’所以落下強度亦變強。而且，若落下強产相^同 ‘則作動壓能做得較低。因此，可容易進行任意的作=壓' 落下強度之品質設計。但是，在大致正交的易破裂溝之交 點附近，為了避免極端之應力集中，而需要考慮應力緩和 之形狀設計。此可以透過金屬材料之加工硬化係數和開尖 強度之研究來得到精密的適當解。 312ΧΡ/發明說明書(補件)/97-02/90140210 11 200836444 (發明效果） 迅根據本發明’可得到在電池内部$力上升時 ===，!池内部之氣趙，同時落下強度 炎艮1了徒回生產性之優異效果。 【實施方式】 列上所述，可得到在各種易破裂溝之交點產生的 ^傳播，即破裂進行時，—部分簡連接狀態並且可得 J更大面積之抽氣開口部之優異作用效果，另一方面可 传到即使使用者手滑而將密閉型電池等金屬罐容哭掉落 在地板^亦能承受落下衝擊而不易開口（破裂）之效果。 而且，运種作用效果實際使用即可以明白，但理論上如上 所述尚未解決之部分仍存在。 以下使關卜與習知例比對來詳細說明本發明。 圖1表示習知例i、2與本發明實施例i、2之俯視圖、剖 視圖以及應變/作動屢之圖。圖2、圖3為分別表示單向 籲剪切加工易破裂溝U之製造步驟的剖視圖及剖面顯微鏡 照片，圖4、圖5為分別表示往復方向煎切加工易破裂溝 • 12之製造步驟的剖視圖及剖面顯微鏡照片。在圖〗中，a 表示習知例卜B表示習知例2, c表示本發明實施例i， D表示本發明實施例2，當各作動壓分別以γΑ、几、孔、 YD表示時’則YA>YB>YC>YD。而且，γΑ為習知例i的 作動廢，YB為習知例2的作㈣，代為本發明實施们 之作動屋’ YD為本發明實施例2的作動藶。咖為易破裂 溝，E0DR為大致徑向的易破裂溝，E〇p為破裂開始點（交 312XP/發明說明書(補件)/97-02/96140210 12 200836444 點）。在圖2、3、4中，A為壓下壓力，L為剪切加工行程， t為單向剪切加工殘厚，h為往復剪切加工殘厚，1〇為材 料鋼板，11為單向剪切加工易破裂溝，12為往復剪切加 工易破裂溝，20為衝壓壓模（或剪切刀），3〇為防皺裝置°。 驾知例1是在俯視圖上以簡單的V缺口剖面長圓狀作為 連續環而形成輪廓的安全閥，該連續環亦可以形成點線狀 之半連續。在該場合，即使施加内壓亦只是整體膨脹而使 外周易開放溝破裂，而開口處並沒有特定，應變（或應力） 大，不易開放。習知例2係在習知例丨之平面長狀 開放蓋之中央部置人縱溝’在上下兩處設置易破裂開始 點此比習知例1更接近本發明，縱線與外環部之交點部 以低作動壓開始破裂。但是，在習知例2中臨界^ 動壓還是很大。 / (實施例1 ) 對此，在本發明實施们中形成Α致圓形之平面形狀， =大致在徑向連接㈣與外環的徑向易破裂溝和内環、外 %易破裂溝之交點（易破裂開始點Ε〇ρ)，以低壓力產生 破裂而使裂痕傳播。 (實施例2 ) ^發明實施例2中，在徑向有4條易破裂溝以輪輕狀 連f内環和外環’但是由8個易破裂點成為起點產生破裂 而f各點三方傳播裂痕，以低内壓（作動幻在低應變之 狀態下低壓破裂。 另外’本發明實施例中，並不只2段環狀，對於長圓形、 312XP/發明說明書(補件)/97-02/96140210 13 200836444 橢圓形、扇形、多邊形等，並無特別限制形狀 要包括大致正交之画。在將形成開口 重要的是 狀易破裂溝之殘厚設“、t2’且將習知之、破輪= 之限定理由如下。 ，⑴。該公式 右τ比（ti，t2)的1.2倍還*，則安全闕 破壞溝殘厚tl、乜的板厚大致相同。若τ及=与τ = 下強度弱，又若過大則作動壓變高。另外若Τ比]則洛 = ),2.0倍還大’則安全閥之厚度τ變大且作動壓：顯 k咼。由以上理由，設定為12 (七，乜）(t:、: (產業上之可利用性） 本發明之基本原理在於，當將常見的軟鋼線（鋼絲）用 手繼繽彎曲時則產生加工硬化（此時稍微發熱）而逐漸變 硬，最後折斷的軟質金屬特有之性質，與應力集中一起保 _持，將從剪切應力達到脆性破壞之破裂特性與電池安全閥 之所希主的性貝結合，其特徵在於，透過使剖面形狀不同 -之多個易破裂溝例如以大致直角相交等，而將裂痕發生容 易性與裂痕傳播特性改變。本發明更進一步暗示在此施以 (低中溫）熱處理，並透過恢復、再結晶處理，可微妙地 控制要求特性。 因此’本發明思想可應用於習知沒有想到的各種容易分 離的金屬片連續體上。例如容易分離的半導體電子零件連 續體和其他醫療用樣品和藥劑單位等各種精密零件的中 312XP/發明說明書(補件)/97-02/96140210 14 200836444 間處理用容易分離的連續體等，用途不限。 【圖式簡單說明】 圖1表示習知例和本發明實施例。 圖2表示單向剪切加工。 圖3表示單向剪切加工易破裂溝。 圖4表示往復剪切加工。 圖5表示往復剪切加工易破裂溝。 【主要元件符號說明】200836444 IX. Description of the Invention: [Technical Field] The present invention relates to a safety valve for a sealed battery, and more particularly to a continuous or semi-continuous valve body ring which is easy to adjust the strength of the rupturable portion. A safety valve for a sealed battery having a shape and various cross-sectional shapes that are easily broken. - [Prior Art] When the internal pressure of the battery rises in the battery or the like, and the internal pressure of the battery rises due to some reasons inside the battery, in the sealed battery, the battery is destroyed due to the explosion of the battery (4). Damage to things. As a countermeasure, it is necessary to discharge the gas inside the battery before the explosion is reached, so that the safety valve is provided in the battery exterior portion. . The King's valve has a valve body that is ruptured open in the absence of preparation. The opening pressure is of course higher than the normal internal pressure of the valve body, but the safety is considered to be as low as possible. The open appeal force (sometimes the critical open pressure is called dynamic pressure and when the amount of gas generated inside the battery is large, if the area of the gas that emits the gas is small, the internal pressure of the battery temporarily increases and there is an explosion. Danger. Therefore, it is very important that the area of the gas discharge portion due to the breakage of the easily ruptured groove has an area sufficient to release the amount of gas generated (according to our test: 7 coffee 2 or more, the clock ion battery is used for A portable telephone or a digital camera, etc., so that the operator can drop it on the ground or on the floor to break the valve body, and there is a possibility of electrolyte leakage. Therefore, for this accidental fall, the valve body is not easily damaged. Very important (this is called 312XP / invention manual (supplement) / 97. 〇 2 / 9614 〇 21 〇 200836444 drop strength). For the purpose of the above mentioned ion-ion battery There is a safety valve mechanism. This safety is in the case of the ancient + for the queen. The side and the bottom of the battery are transmitted by straight lines or curves or ~, ,, and δ by the stamping or surname of the width 2_ below ( It is called engraving or blushing, and is provided on the sealing plate: the case where the thin body is formed here. The planar shape of the valve body is 壬, round, elliptical or easy to open the can of the beverage can or The shape of the aggregate is 0, j~ The cross-section of the body cover is a safety valve with a notch mark, and the pressure cannot be set to be less than /gf/cm2, and the opening area of the gas cannot be ensured. Therefore, it is gradually not used. As a means for providing an open port on the sealing plate and forming a thin valve body there is a means for initially opening an opening having a predetermined size in the surface of the sealing plate. (clad) or melt-bonding a film having a thickness of 20 to a valve body as a valve body (generally referred to as a coating valve). Further, it is formed by punching or etching in a surface of the sealing plate and having The means of setting a large 1 membrane safety valve (a This is called a stamping valve 1. Although the former coated valve has the advantages of maintaining a low operating pressure as a required characteristic of the safety valve, a wide discharge area, and a strong drop strength, it requires a manufacturing step such as three times of punching and a cladding step. It is complicated, and it is difficult to manufacture and the yield is poor. Therefore, there is a negative disadvantage of high cost. In this case, since the stamping valve can form a valve body on the inner surface of the sealing plate only by punching (including parting die pressing), it can be produced inexpensively. Further, it is possible to easily ensure a safety valve area of a predetermined size or more sufficient to release a gas, but it is difficult to obtain a stable low operating pressure when compared with a coated valve in the 312xp/invention specification (supplement)/97-02/96140210 6 200836444. Therefore, the development of the stamping valve is generally carried out by precise bottom dead center control of the press apparatus and improved development of suitable materials. Both of these are being developed by stamping device manufacturers and valve body material manufacturers. Moreover, in the production of stamping manufacturers as sealing plates for the carcass and battery manufacturers using the same, the developers focus on obtaining the required low-acting stamping valves through the shape of the stamping valves, and many invention patents. I have made a request, but I have not yet reached the level of the operating pressure that can be obtained at a low and low enough. As shown in Japanese Patent Laid-Open No. Hei 27-27364, a thin-walled valve body 23 having a dome shape is formed in the opening 21 of the sealing plate 2, and a rupture groove is formed around the valve body $. In general, in the sealing plate, a flat wall portion of a continuous or non-connected flat, and a thin portion of the shell I is formed, and in the type of the rupture groove formed in the thin portion, the inner wall of the battery rises through the thin wall. Since the valve body is deformed by the pressure in the battery to actuate the safety valve, the safety is achieved at a relatively low pressure (see Patent Document 1). Further, as shown in Fig. 2 (8) of Japanese Patent Laid-Open Publication No. 5-135873, a thin-walled valve body is formed on the inner:::6, and a dome portion 2 is formed on the valve body toward the periphery of the battery, in the above-mentioned circle At least one rupture groove 4 at the top that easily ruptures the valve body, so generally becomes two (four) Γ ίί: body: near the circumference of the valve body, the battery is located at the periphery of the valve body, so at... When it is ascending, it will be located in the place where the deformation is the smallest in the wide body (Patent Document 2). In Japanese Patent Publication No. Sho 58_23165, the use of one-way shearing 312ΧΡ/invention 'monthly book (supplement)/97• is described.嶋(10) 咖 7 200836444 A method of manufacturing a metal sheet continuous body which is easy to separate in a processing and reciprocating direction (refer to the patent document 3) (Patent Document 1) Japanese Patent Laid-Open No. 27-364 Patent Document 2) Japanese Patent Laid-Open Publication No. H5-15-1873 (Patent Document 3) Japanese Patent Publication No. - [Summary of the Invention] - In the prior art, for a sealed battery, especially Queen's valve for lithium-ion batteries, etc., in Eryang Machines, miyamatools, etc. have been developed, improved, and some have been put into practical use. However, 'it is usually stable and not easy to open under the light internal impact such as falling and low internal pressure.' A safety valve for a sealed battery that breaks the opening when the pressure is sharply increased and can prevent the high safety of damage is not yet fully commercialized. (Means for Solving the Problem) ❿ According to the present invention, the following safety valve can be provided: - a closed type battery The safety valve 'generates an abnormal gas with an abnormal change in the environment, which causes a sharp rise in the gas pressure in the groove; and is characterized in that it has a substantially continuous or discontinuous annular (four) easily fractured groove which is substantially orthogonal to the outer surface of the groove. The generally radially rupture groove 'is not easily broken for accidental fall of the groove as a whole, and the other is that the internal pressure rise due to the generation of abnormal gas in the groove can be released according to the design of the lower internal pressure rupture ( The scope of the patent application scope is the first item); such as the safety of the sealed battery of the scope of patent application item i, among them, 312XP / invention manual (supplement V97-02/9 6140210 8 200836444 Approximate t-trending rupture groove profile is y cleavage groove or reciprocating shear processing type easy to break, cover type easy to break the second item); $ 破衣沟之思-种(中中专利范易安全 The safety valve of the closed type battery of the second item, in the middle, the intersection of the easy-breaking groove is the combination of the following ···, the middle G)v notch type rupture groove; (2)V notch type is easily broken a combination of a ditch and a unidirectional shearing type easily ruptured groove; a combination of dusting in a male cut (3) one-way shearing type rupture groove; (4) a combination of reciprocating shearing and refractory ditch; Ditch (two shears: two-type easy-to-break groove and reciprocating shear-type easy-to-break groove). (Applicable to the third paragraph of the patent scope); and, in the eight-meter range, the safety of the sealed battery of any one of the first to the third items, the thickness of the wide-angle rupture groove, "time, the thickness of the safety slab" (ti'w (Japanese Patent Application No. 4) (Effect of the Invention) By carrying out the above invention, a thin-walled valve body is formed on an open hole of a plate-shaped sealing plate for sealing a battery, and the battery is provided. (4) = a safety valve of a battery in which the peripheral portion of the valve body is partially or completely broken to discharge the gas of the battery toward the outside of the battery when the valve body is at a predetermined value or more, and the shape of the valve body is solid, elliptical or quadrangular. The shape of the seal (continuous or discontinuous ring or hollow radial), the rupture groove is located from the periphery of the valve body 312 ΧΡ / # ζ § | ^ 0§ ^ (^ φ) / 97. 〇 2 / 9614 Ο 210 〇 200836444 Therefore, it is possible to obtain an effect of causing deformation with a small force. Further, since the central rupture groove has, for example, four or more substantially radial auxiliary rupture grooves in the substantially vertical direction toward the valve body peripheral portion, it is the father of the rupture groove. Points (intersections between easily ruptured trenches) should be concentrated Therefore, it will start to break at low pressure, and if it starts to rupture, it will be different from the pressure toward the outside of the battery. The rupture groove will also be subjected to the pressure in the direction of the battery side/face through the auxiliary rupture groove. Propagation) is carried out at a relatively small pressure. Therefore, as described above, it is possible to obtain a very low dynamic pressure as compared with the conventional stamping valve. The stamping valve of the present invention includes a V-notch type easily ruptured groove or One-way or reciprocating shear processing of the rupture ditch or the combination of crack propagation (crack propagat i on) using the father point at a substantially right angle as the starting point of the fracture and the intersection of the easily ruptured grooves as the starting point of the fracture The valve body formed by the continuous rupture piece continuum in the easy rupture groove. The unidirectional shear processing easy rupture groove (1way SEOD) or the reciprocating shear processing rupture groove (2way shearing easy open Ditch; 2WAY SE0D) is produced by the treatment of the typed anti-wrinkle molds as shown in Fig. 2, Fig. 3, Fig. 4, and Fig. 5, and only the center portion is work hardened. The connection portion is connected. The remaining connection portions shown in Fig. 3 and Fig. 4, respectively, have a high difference in density and are hardened by work, so they are brittle and prone to cracks and are easily broken. Any one is due to the Bauschinger effect ( In addition, the term "rupture" in the present invention means that in the easily broken portion, for example, the plastic 312XP/invention specification (supplement)/97-02/96140210 10 200836444, the processing density is high and the damage is broken. The intersection of the rupture groove where the stress is easy to concentrate or in the vicinity thereof, firstly, the crack is generated by the internal pressure, and the crack propagates along the rupture groove to cause the rupture of the valve body, and the internal high-pressure gas is discharged into the atmosphere, actually A part of the rupture piece (valve body) is generally rolled up, and a part of the rupture groove (mainly a ductile deformation portion) does not break and remains. This feature prevents the risk of separation due to the separation of the valve body during rupture. In addition, when the rupture starts, a crack is generated from the intersection of the rupture groove and the auxiliary rupture groove, and the portion surrounded by the two auxiliary rupture grooves and the substantially orthogonal rupture grooves is bent toward the outer side of the battery, so A sufficient area for releasing gas is ensured when the valve body is actuated. In addition, according to the conventional examples 1, 2 and the embodiment of the present invention, the order of the same thickness, the same material (soft steel plate or corrosion resistant A1 alloy plate) when comparing 'when comparing the operating pressure YA, YB, YC, γ ]) is γΑ>γΒ>γ〇YD ° • As described above, the valve body is broken by the force in both the outer direction and the side direction of the battery, so when compared with the conventional stamping valve, the design is activated. When the pressure is the same, the thickness of the easily ruptured groove and the auxiliary rupture groove can be formed thicker, so the falling strength is also increased. Moreover, if the strength of the production is the same, then the dynamic pressure can be made lower. Therefore, it is possible to easily perform an arbitrary quality design with a drop strength. However, in the vicinity of the intersection of the substantially orthogonal frangible grooves, in order to avoid extreme stress concentration, it is necessary to consider the shape design of the stress relaxation. This allows for a precise and appropriate solution through the study of the work hardening coefficient and the open strength of the metal material. 312ΧΡ/发明发明(补件)/97-02/90140210 11 200836444 (Effect of the invention) According to the present invention, it is possible to obtain a gas inside the battery when the force rises ===, and the inside of the pool is at the same time, and the intensity is lowered. 1 The effect of the production is excellent. [Embodiment] As described above, it is possible to obtain a propagation effect at the intersection of various rupturable grooves, that is, when the rupture is performed, the partial connection state is obtained, and an excellent effect of the suction opening portion of a larger area of J can be obtained. On the other hand, it can be transmitted to a metal can, such as a sealed battery, even if it is slippery on the floor, so that it can withstand the impact of falling and is not easy to open (break). Moreover, the effect of the operation effect can be understood, but the theoretically unresolved part still exists as described above. Hereinafter, the present invention will be described in detail by comparing the related examples with the conventional examples. Fig. 1 is a plan view, a cross-sectional view, and a strain/action diagram of the conventional examples i and 2 and the inventive examples i and 2. 2 and 3 are respectively a cross-sectional view and a cross-sectional micrograph showing the manufacturing steps of the one-way shearing process rupture groove U, and FIGS. 4 and 5 are manufacturing steps respectively showing the reciprocating direction of the rupture groove 12 in the reciprocating direction. Sectional view and section photomicrograph. In the figure, a denotes a conventional example, and B denotes a conventional example 2, c denotes an embodiment i of the present invention, and D denotes a second embodiment of the present invention, when each of the operating pressures is represented by γΑ, a few, a hole, and YD, respectively. Then YA>YB>YC>YD. Further, γΑ is the operation waste of the conventional example i, and YB is the work (4) of the conventional example 2, and the actuating house YD of the present invention is the operation of the second embodiment of the present invention. The coffee is an easy-to-break groove, E0DR is a generally radial frangible groove, and E〇p is the crack initiation point (Cross 312XP/Invention Manual (Supplement)/97-02/96140210 12 200836444). In Figures 2, 3 and 4, A is the pressing pressure, L is the shearing stroke, t is the unidirectional shearing residual thickness, h is the reciprocating shearing residual thickness, 1 is the material steel plate, 11 is the single The shearing process is easy to break the groove, 12 is a reciprocating shearing process and easy to break the groove, 20 is a stamping stamper (or a shearing knife), and 3 is a wrinkle preventing device. The driving example 1 is a safety valve which is formed in a plan view by a simple V-notch cross-section as a continuous ring, and the continuous ring may be formed in a dotted semi-continuous manner. In this case, even if the internal pressure is applied, only the entire expansion is performed, and the outer peripheral open-opening groove is broken, and the opening is not specified, and the strain (or stress) is large, and it is difficult to open. Conventional Example 2 is that the longitudinal groove is provided in the center portion of the planar open-opening cover of the conventional example, and the start-up point is set at the upper and lower portions. This is closer to the present invention than the conventional example 1, the vertical line and the outer ring portion. The intersection portion begins to rupture with a low dynamic pressure. However, in the conventional example 2, the critical pressure is still large. / (Example 1) In this regard, in the embodiment of the present invention, a planar shape of a circular shape is formed, = a radial rupture groove and an inner ring, and an outer % rupture groove which are substantially connected in the radial direction (four) and the outer ring The intersection point (easy to break the starting point Ε〇ρ) generates cracks at a low pressure to propagate the cracks. (Embodiment 2) In Inventive Embodiment 2, there are four frangible grooves in the radial direction to lightly connect the inner ring and the outer ring of the f', but the eight easy-break points become the starting point to generate cracks and the f-points are three-way. Crack, with low internal pressure (low-pressure rupture in the state of low strain. In addition, in the embodiment of the present invention, not only two-stage ring, for oblong, 312XP/invention specification (supplement)/97-02 /96140210 13 200836444 Ellipse, sector, polygon, etc., there is no particular limitation on the shape to include a roughly orthogonal painting. It is important to form the opening, and the thickness of the easy-to-break groove is set to ", t2' and will be known and broken. The reason for the limitation of the round = is as follows: (1). The right τ of the formula is 1.2 times the ratio of (ti, t2) and *, the thickness of the safety 阙 沟 沟 tl tl tl tl 乜 tl tl 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 If the strength is weak, if the pressure is too large, the dynamic pressure will become high. If the ratio is greater than the case, then Luo =), 2.0 times larger, then the thickness τ of the safety valve becomes larger and the dynamic pressure is: k 咼. For the above reasons, set to 12 (7, 乜) (t:,: (industrial availability) The basic principle of the invention lies in the common soft steel (Steel wire) When it is bent by hand, it will be hardened by work hardening (slightly hot at this time) and gradually harden. The unique properties of the soft metal that is finally broken, together with the stress concentration, will be brittlely damaged from the shear stress. The rupture characteristics are combined with the properties of the battery safety valve, and the rupture grooves are changed at a substantially right angle by, for example, intersecting the rupturable grooves having different cross-sectional shapes, thereby changing the ease of occurrence of cracks and the propagation characteristics of the cracks. The present invention further implies that the (low intermediate temperature) heat treatment is applied thereto, and the recovery characteristics and the recrystallization treatment can be subtly controlled. Therefore, the present invention can be applied to various easily separable metal sheets which are not thought of. In the continuum, for example, the 312XP/inventive manual (supplement)/97-02/96140210 14 200836444 of various precision parts of the semiconductor electronic component continuum and other medical samples and chemical units that are easy to separate are easily separated. Figure 1 shows a conventional example and an embodiment of the present invention. Fig. 2 shows a one-way shear Processing. FIG. 3 shows a unidirectional shearing frangible grooves. FIG. 4 shows a reciprocating shear processing. FIG. 5 shows a reciprocating shearing frangible groove. The main element REFERENCE NUMERALS
習知例1 習知例2 本發明實施例1 本發明實施例2 習知例1之作動壓 習知例2之作動壓 本發明實施例1 本發明實施例2 易破裂溝 大致徑向之易破裂溝 破裂開始點（交點） 壓下壓力 剪切加工行程 單向剪切加工殘厚 往復剪切加工殘厚 材料鋼板Conventional Example 1 Conventional Example 2 Inventive Example 1 Inventive Example 2 In the second embodiment of the present invention, the dynamic pressure of the conventional example 2 is the dynamic pressure of the present invention. The first embodiment of the present invention is easy to rupture the groove. Rupture groove rupture start point (intersection point) Pressing pressure shear processing stroke Unidirectional shear processing Residual thick reciprocating shear processing Residual material steel plate
A B C DA B C D
YA YB YC YD EOD EODR ΕΟΡ A L tl t2 10 312XP/發明說明書(補件)/97-02/96140210 15 200836444 11 單向剪切加工易破裂溝 12 往復剪切加工易破裂溝 20 衝壓壓模（或剪切刀） 30 防皺裝置YA YB YC YD EOD EODR ΕΟΡ AL tl t2 10 312XP / invention manual (supplement) /97-02/96140210 15 200836444 11 Unidirectional shearing process rupture groove 12 Reciprocating shearing process rupture groove 20 Stamping die (or Cutting knife) 30 anti-wrinkle device
312XP/發明說明書(補件)/97-02/96140210 16312XP/Invention Manual (supplement)/97-02/96140210 16