200814402 九、發明說明： 【名务明戶斤屬才支射$區j：或】 本發明係有關於一種提高對抗内壓之強度之電、、也罐 t 才支冬好3 5 手機、PDA (個人數位助理）、或筆記型個人電腦等所 使用之二次電池，在充電時及連續使用時會發熱。因此， 該發熱所造成之電解液或氣體之膨脹，會使二次電、、也内部 產生很大之内壓。所以，常會發生電池罐因承受不住内壓 而損壞之現象。然而，這樣之内壓只要是在一定之基準内， 10則安全閥可作動，防止電池之爆炸（例如專利文獻1、專利 文獻2)。 此外，隨著逐年電池之小型化薄型化，也必須更提昇 電池之性能。為了提昇電池之性能，一般方法可舉增加電 池之内容積為例（例如專利文獻3)。又，為了在不改變外 11之尺寸下增加内各積，一般是希望將電池罐之侧壁減至 最薄（例如專利文獻4)。 【專利文獻1】日本專利公開公報2〇〇1_23596號 【專利文獻2】日本專利公開公報平丨丨_25刪6號 【專利文獻3】日本專利公開公報綱2·〇丨57!二號 【專利文獻4】日本專利公開公報2003-242936號 。而如Θ述使電池罐之側壁減到最薄之結果，會對 電池罐局部隼中& I& & 木f加重負重，可能會發生在較安全閥作動壓 力低之壓力下損壞電池的現象。 第1圖頌不一般電池罐之外觀構造。第1 (A)圖係電池 5 200814402 罐1之外觀立體圖。第1 (B)圖係沿第1 (A)圖之Xa —Xb 截取之截面圖。第1 (C)圖係沿第1 (A)圖之Ya — Yb截取 之截面圖。 電池罐1係一片金屬板藉由加壓加工成形為有底角筒 5狀之外包裝罐。電池罐1大致包含有長邊側壁2、短邊側壁 3、底壁4、長邊R壁5、短邊尺壁6、角壁7。底壁4形成電池 罐之底°卩且王現具有長邊和短邊之略成扁平狀之長方 形。 長邊側壁2係在底壁4之長邊侧之電池罐1之側壁，且短 10邊侧壁3係在底壁4之短邊側之電池罐丨之侧壁。長邊r壁5 係底壁4與長邊側壁2之連結部分，且其壁面呈曲面形狀。 短邊R壁6係底壁4與短邊側壁3之連結部分，且其壁面呈曲 面形狀。角壁7係長邊側壁2與短邊侧壁3鄰接之角部分，且 其壁面呈曲面形狀。該第1圖所示之電池罐丨設計為一般之 15 情形。 第2圖係第1圖之κ部分之放大圖。電池罐丨係通常由加 壓加工製成。長邊側壁2與短邊侧壁3於加壓加工時，因承 受巨大拉伸力，長邊侧壁2與短邊側壁3除厚度變薄之外， 還會發生最嚴重之加工硬化現象。 20 其次，長邊尺壁5及短邊尺壁6之外表面及内表面分別有 曲率半徑R、r之略曲面，且該曲率半徑R、r各自形成的圓 之中心Cr、Cr位在不同位置。 假設將電池罐1設計成，例如，，r=0 6[mm]， 長邊側壁2之板厚（符號12) =0.2[min]，短邊侧壁3之板厚 6 200814402 (符號12) =0·2[_，底壁4之板厚（符號u) =〇 5[卜 此時，長邊R壁5及短邊尺壁6至長邊侧壁2及短邊侧壁3之部 分’其侧壁厚度急遽變薄，厚度減少。以下，利用第3圖說 明依該設計進行之加壓加工。 5 帛3圖顯示由加磨加工而形成之電池罐1之外形。第3 (A)圖係電池罐1之立體圖，且第3 (B)圖係【部分之放 大圖。依前述設計進行加工，可形成之電池罐丨具有厚底壁 4、較厚之板厚及加工硬化顯著之長邊反壁5及短邊尺壁6、 及與因構造上之強度強和加工硬化而強度增加之角壁7鄰 10 接的長邊侧壁2與短邊側壁3。 此時，相較於短邊側壁3、底壁4、長邊尺壁5、短邊R 土6、角壁7之強度，長邊側壁2由於板厚較薄所以強度較 弱並具有，軟性。因此，當内壓施加在電池罐1時，長邊 侧壁2會發生延伸現象，且可撓曲。200814402 IX. Inventor's note: [The name of the Ming dynasty is only to shoot the $ zone j: or] The invention relates to a kind of electricity that improves the intensity against the internal pressure, and also can be used to support the winter. A secondary battery used in a personal digital assistant or a notebook personal computer may generate heat during charging and continuous use. Therefore, the expansion of the electrolyte or gas caused by the heat generation causes a large internal pressure and a large internal pressure. Therefore, it is often the case that the battery can is damaged by the internal pressure. However, if such internal pressure is within a certain standard, 10 safety valves can be actuated to prevent explosion of the battery (e.g., Patent Document 1, Patent Document 2). In addition, as the battery is miniaturized and thinned year by year, the performance of the battery must be improved. In order to improve the performance of the battery, the general method can be exemplified by increasing the internal volume of the battery (for example, Patent Document 3). Further, in order to increase the inner product without changing the size of the outer surface 11, it is generally desirable to reduce the side wall of the battery can to the thinnest (e.g., Patent Document 4). [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. 2, No. 2, No. 2, No. 2, Japanese Patent Laid-Open Publication No. Hei. Patent Document 4] Japanese Patent Laid-Open Publication No. 2003-242936. As a result of the fact that the side wall of the battery can is reduced to the thinnest, the weight of the battery can be increased, and the load may be damaged under the pressure of the safety valve. phenomenon. Figure 1 shows the appearance of a battery can. 1 (A) diagram battery 5 200814402 Appearance perspective view of tank 1. Figure 1 (B) is a cross-sectional view taken along Xa - Xb of Figure 1 (A). The first (C) diagram is a cross-sectional view taken along the Ya-Yb of the first (A) diagram. The battery can 1 is a metal plate which is formed into a bottomed rectangular tube by press processing. The battery can 1 generally includes a long side wall 2, a short side wall 3, a bottom wall 4, a long side R wall 5, a short side wall 6, and a corner wall 7. The bottom wall 4 forms the bottom of the battery can and the king now has a slightly flattened shape with long sides and short sides. The long side wall 2 is attached to the side wall of the battery can 1 on the long side of the bottom wall 4, and the short side wall 3 is attached to the side wall of the battery can on the short side of the bottom wall 4. The long side r wall 5 is a connecting portion between the bottom wall 4 and the long side wall 2, and the wall surface thereof has a curved shape. The short side R wall 6 is a connecting portion between the bottom wall 4 and the short side wall 3, and its wall surface has a curved shape. The corner wall 7 is a corner portion adjacent to the long side wall 2 and the short side wall 3, and its wall surface has a curved shape. The battery can shown in Fig. 1 is designed in the general case of 15 cases. Fig. 2 is an enlarged view of the κ portion of Fig. 1. Battery cans are usually made by pressurization. When the long side wall 2 and the short side wall 3 are subjected to press working, the long side wall 2 and the short side side wall 3 are thinned in addition to the thickness, and the most severe work hardening phenomenon occurs. 20 Next, the outer surface and the inner surface of the long-side ruler wall 5 and the short-side ruler wall 6 respectively have a slightly curved surface of curvature radius R and r, and the centers of the circles formed by the curvature radiuses R and r have different Cr and Cr positions. position. It is assumed that the battery can 1 is designed to, for example, r=0 6 [mm], the plate thickness of the long side wall 2 (symbol 12) = 0.2 [min], and the thickness of the short side wall 3 6 200814402 (symbol 12) =0·2[_, the thickness of the bottom wall 4 (symbol u) = 〇 5 [i. at this time, the long side R wall 5 and the short side wall 6 to the long side wall 2 and the short side wall 3 part 'The thickness of its sidewall is sharp and thin, and the thickness is reduced. Hereinafter, the press working according to the design will be described using Fig. 3. 5 帛 3 shows the shape of the battery can 1 formed by grinding. The third (A) is a perspective view of the battery can 1 and the third (B) is a partial enlarged view. According to the foregoing design, the battery can can be formed with a thick bottom wall 4, a thick plate thickness and a long-side anti-wall 5 and a short-edge wall 6 which are significantly hardened by work hardening, and strong in construction strength and work hardening. The increased strength of the corner wall 7 is adjacent to the long side wall 2 and the short side wall 3. At this time, compared with the strength of the short side wall 3, the bottom wall 4, the long side wall 5, the short side R soil 6, and the corner wall 7, the long side wall 2 is weak and has a softness due to the thin thickness. . Therefore, when the internal pressure is applied to the battery can 1, the long side wall 2 is extended and can be flexed.
15 在長邊側壁2中，中央部之延伸為最大，愈靠近長邊R 壁5、角壁7 ’延伸就愈小。即，愈接近長邊側壁2之中心部， 延伸就會愈大。因此’即使電池罐1之内部有内壓發生，還 是可藉板材之撓曲減輕其負重。 然而，愈接近長邊R壁5、短邊R壁6、角壁7，板材之 20 延伸就愈小，並無法抵抗在長邊R壁5、短邊R壁6、及角壁 7和長邊側壁2之邊界線上因内壓而產生之負重。因此，無 法藉由板材之延伸來吸收内壓，在該邊界線部分會產生板 材損壞情形。 特別是，由長邊R壁5與角壁7所包圍之長邊側壁2的角 7 200814402 部分（參照第3 (B)圖），因顯著之加工硬化而無法期待側 壁延伸之部分。該部份，因各壁之板厚之不同和加工硬化 不均-，所以對内壓之耐力斷層甚為顯著，將會由該部分 始損壞。第2圖、第3圖中係以符號2〇表示受到如此損壞 5 之部分。 查證内壓施加於電轉丨而導致電轉丨㈣之機制， 結果確認在長邊R壁5及短邊厌壁6和長邊側壁2、短邊側壁3 及角壁7之間之環繞狀之邊界部分（以下稱為A線） 上有損 壞情形。 10 此相壞現象最大之原因，如先前所述，是由於對内壓 之耐力之斷層（A線）所造成。另，僅使形成長邊側壁2及 短邊侧壁3，和長邊_及短邊_之内侧表面之曲面之 曲率半徑I·加大，也無法解決上述問題。 t 明内3 15 ㈣於上述之問題，本發明係提供-種提高對内壓之 耐力之電池罐。 本發明之有底筒狀的電池罐，其底部之内表面之端部 …、筒π之内表面之端部鄰接並具有曲面之角部分之内 2，愈遠離該底部愈大。又，前述電池罐之形狀係有底角 20 同狀。 一 再者’前述電池罐之材質係銘。又，形成前述内徑之 表面之形狀係錐形或略錐形。又，本發明之電池罐係用於 電池之外包裝部分。 另，本發明係-種藉由加壓加工使一片金屬板成形為 8 200814402 有底筒狀之電池罐的製造方法，且該電池罐之製造方法係進 行加壓加工，使其底部之内表面之端部與其筒部之内表面 之端部鄰接並具有曲面之角部分之内徑，愈遠離該底部愈 大者。 5 依本發明，由於可提昇對内壓之耐力，所以可防止較 ♦ 安全閥之作動壓力低之壓力損壞電池罐的問題。 【實施方式3 0 本實施態樣為改善電池罐1之損壞，係注重對内壓之而才 力的斷層，使集中在該斷層線上局部處之力分散。 10 第4圖係本實施態樣之電池罐之底部之角附近的外觀 一部分的放大立體圖。同圖係對應第3 (B)圖之部分。習 知環繞狀之A線之上方略平行地設置環繞狀之b線。該八線 及B線將在第5圖詳細說明。 第5圖係第4圖之放大部分Μ之截面圖。第5圖係對應第 15 2圖之圖。以下，將位在習知環繞狀之Α線之上方預定高度 φ 之環繞狀邊界區域稱為8線。此外，A線與B線之環繞間設 置緩和耐力斷層之緩和區域D。15 In the long side wall 2, the extension of the central portion is the largest, and the closer to the long side R wall 5, the smaller the corner wall 7' extends. That is, the closer to the center portion of the long side wall 2, the larger the extension. Therefore, even if internal pressure occurs inside the battery can 1, it is possible to reduce the load by the deflection of the sheet. However, the closer to the long side R wall 5, the short side R wall 6, and the corner wall 7, the smaller the extension of the sheet 20 is, and it is not resistant to the long side R wall 5, the short side R wall 6, and the corner wall 7 and the length. The load on the boundary line of the side wall 2 due to the internal pressure. Therefore, it is not possible to absorb the internal pressure by the extension of the sheet, and the sheet material is damaged in the boundary portion. In particular, the portion of the long side wall 2 surrounded by the long side R wall 5 and the corner wall 7 is 7200814402 (see Fig. 3(B)), and the portion where the side wall extends cannot be expected due to significant work hardening. In this part, due to the difference in the thickness of the walls and the uneven work hardening, the endurance to the internal pressure is very significant and will be damaged from this part. In Fig. 2 and Fig. 3, the part which is so damaged is indicated by the symbol 2〇. The mechanism for applying the internal pressure to the electric turn to cause the electric turn (4) is verified, and as a result, the circumferential boundary between the long side R wall 5 and the short side dead wall 6 and the long side side wall 2, the short side side wall 3, and the corner wall 7 is confirmed. There is damage on the part (hereafter referred to as the A line). 10 The cause of this phase failure is the largest, as previously described, due to the fault (A line) of the endurance of the internal pressure. Further, the above problem cannot be solved by merely increasing the radius of curvature I of the long side wall 2 and the short side wall 3, and the curved surface of the inner side surface of the long side _ and the short side _. t Ming 3 15 (d) In the above problems, the present invention provides a battery can which is improved in endurance against internal pressure. In the bottomed cylindrical battery can of the present invention, the end portion of the inner surface of the bottom portion, the end portion of the inner surface of the cylinder π is adjacent and has the inner portion 2 of the curved surface portion, and the larger the distance from the bottom portion. Further, the shape of the battery can has the same shape as the bottom corner 20. Again, the material of the aforementioned battery can is the name. Further, the shape of the surface forming the aforementioned inner diameter is tapered or slightly tapered. Further, the battery can of the present invention is used for the outer packaging portion of the battery. Further, the present invention is a method for manufacturing a battery can of a bottomed cylindrical shape by press working a sheet metal plate, and the method for manufacturing the battery can is subjected to press working to have an inner surface of the bottom portion thereof. The end portion is adjacent to the end portion of the inner surface of the cylindrical portion and has an inner diameter of a curved corner portion, the larger the distance from the bottom portion. 5 According to the present invention, since the endurance against the internal pressure can be improved, it is possible to prevent the problem of damaging the battery can by the pressure lower than the operating pressure of the safety valve. [Embodiment 3] In the present embodiment, in order to improve the damage of the battery can 1, it is focused on the fault of the internal pressure, so that the force concentrated on the local line on the fault line is dispersed. 10 Fig. 4 is an enlarged perspective view showing a part of the appearance of the vicinity of the corner of the bottom of the battery can of the embodiment. The same figure corresponds to the part of Figure 3 (B). It is conventionally arranged that the w-line of the circumference is arranged slightly parallel to the A line of the surrounding shape. The eight and B lines will be explained in detail in Figure 5. Fig. 5 is a cross-sectional view showing an enlarged portion of Fig. 4; Figure 5 corresponds to the figure of Figure 15. Hereinafter, a wrap-around boundary region having a predetermined height φ above a conventional wrap line is referred to as an 8-line. In addition, a relaxation zone D for alleviating the endurance fault is provided between the A and B lines.
該緩和區域D之特徵係使形成内侧壁之曲面之曲率半 麵形成之圓中心❻較第2圖之中心q位置更往電池和 20之内部方向移動而形成該曲面，且該移動之曲面之端部（A 線）與長邊侧壁2之端部（B線）&结成錐肋，或以較大 之曲率半徑連結成如相當圓滑之曲面28。 即，為使長邊㈣2之板厚連續變化且與紐哪及短 邊R壁6相連，係使A線部分到B線部分之間位在内侧方向之 9 200814402 壁面形成錐形27或連續之圓滑曲面28 (略錐形） °如此一 $ 使集中在耐力斷層之負重分散於該錐形27全面 &該曲面28全面’所以可改善發生在D區域之損壞現象。 另°又右笔池罐1係R=i.〇[mm]，r=〇.6[mm]，長邊側壁 5 2之板厚=〇.2[mm]，短邊側壁3之板厚=0.2[mm]，底壁4之板 厚=〇.5[mm]時，則較佳的是A—B之間距離（符號25)(以 下稱為錐形之高度）在1·5〜2.0[mm]，符號26所示之寬度（以 下稱為錐形之寬度）在0.08〜0.1[mm]之範圍内。 其次’說明本實施態樣之電池罐之製造方法。本實施 1〇 ^樣之電池罐係由加壓成形所形成者。所謂加壓成形係指 猎公模和母模等成對之模具（常為金屬模），挾壓金屬板成 形為所期望之形狀。 首先，用一對引伸公模與母模對厚度〇.5[mm]之圓（橢 圓）形鋁板材加壓加工，使之形成有底角筒狀之外包裝罐。 15此時，藉由進行多次之加壓加工而漸漸成形，並在最後數 次（例如，最後1、2次）之加壓成形時，預先於引伸公模 之蝻端形狀設置預定之傾斜面（或圓滑球面藉此，由該 引伸公模加壓，經其傾斜面加壓之部分遂形成錐形巧（或 曲面28)。 2〇 如此，由一片金屬板經加壓加工成形為有底筒狀之電 池罐1，其底部（4)之内表面之端部和其筒部（2或3)之 内表面之端部之鄰接並具有曲面之角部分（由緩和區域D 和曲率半徑Γ之曲面形成）的内徑（27或是28)，愈遠離該底 部愈大。於是’由於可使集中在耐力斷層之負重分散於該錐 200814402 形27全面或該曲面28全面，所以可改善D區域產生之損壞現 以下說明關於使用錐形27之電池罐之實施例。 【實施例】 5 以下，進行本實施態樣之電池罐與習知設計製品之損 壞強度的比較。 第6圖係說明本實施例之損壞強度測量方法之圖。本實 施例採用長41[mm]、寬40[mm]、高4.9[mm]之鋁製電池罐。 如同圖所示，藉著將具有管狀加壓口 31之金屬性蓋體3〇溶 10接在電池罐1之上部開口，以密封該電池罐丨。其次，將加 強壓縮氣體32由加壓口 31注入該密封之電池罐丨，使電池罐 1之内壓上升，並測量電池罐1損壞時之壓力。 第7圖係顯示本實施例之電池罐之測量條件。本實施例 中，使用R=l.〇[mm]，r=0.6[mm]，短邊側壁3之板厚為 I5 〇.3[inm]，角壁7之板厚為〇.4[mm]，長邊侧壁2之板厚為 〇.2[mm]之本實施態樣之電池罐及習知製品進行比較測 里。又，本實施態樣之電池罐，於底部4之角附近形成有錐 形高0.08[mm]，錐形寬i.68[mm]之錐形27。 鈾述比較係對本實施態樣之電池罐與習知製品分別進 20行5次，且其結果顯示在表1中。又，至於習知製品，記載 長邊側壁2之板厚為〇.22[mm]者作為參考。 11 200814402 【表1】 電池罐損壞強度比較表（Kgf7cm2) \ 長邊侧壁板厚 0.2 2 [mm] | 0.2[mm] 0.2 [mm] 習知製品 "Kgf/cm2] 本發明[Kgf/cm2] 樣本1 28.5 7.5 28.5 樣本2 26.0 8.5 26.5 樣本3 32.5 8.0 30.0 樣本4 26.5 8.0 29.5 樣本5 29.5 9.5 28.0 Max 32.5 9.5 30.0 Min 26.0 7.5 26.5 Αν 28.6 8.3 28.5 損壞處 主體部 底部根處 主體部 根據表1，相對於習知製品（板厚〇.2[mm])之損壞強The tempered region D is characterized in that the center of the circle formed by the curvature half surface of the curved surface forming the inner side wall is moved toward the inner direction of the battery and 20 to form the curved surface, and the curved surface is moved. The end (A line) and the end of the long side wall 2 (B line) & are tapered ribs or joined by a relatively large radius of curvature into a relatively rounded curved surface 28. That is, in order to continuously change the thickness of the long side (four) 2 and to connect with the lining and the short side R wall 6, the wall portion of the side of the line B in the inner direction between the line A and the portion B is formed into a taper 27 or continuous. The smooth surface 28 (slightly tapered) ° such a $ is concentrated on the load of the endurance fault dispersed in the cone 27 comprehensive & the surface 28 comprehensive 'so can improve the damage occurring in the D area. Another ° and right pen pool can 1 R = i. 〇 [mm], r = 〇. 6 [mm], long side wall 5 2 plate thickness = 〇. 2 [mm], short side wall 3 plate thickness =0.2 [mm], when the thickness of the bottom wall 4 is 〇.5 [mm], it is preferable that the distance between A and B (symbol 25) (hereinafter referred to as the height of the cone) is at 1·5~ 2.0 [mm], the width indicated by the symbol 26 (hereinafter referred to as the width of the taper) is in the range of 0.08 to 0.1 [mm]. Next, a method of manufacturing the battery can of the present embodiment will be described. The battery can of the present embodiment is formed by press molding. The so-called press forming refers to a pair of molds (usually metal molds) such as a male mold and a female mold, and the rolled metal sheet is shaped into a desired shape. First, a pair of extension male and female molds are used to pressurize a circular (elliptical) aluminum plate having a thickness of 55 [mm] to form a bottomed cylindrical outer packaging can. 15 At this time, it is gradually formed by performing a plurality of press working, and in the last several (for example, the last one or two times) press forming, a predetermined inclination is set in advance in the shape of the end of the extension male mold. The surface (or the smooth spherical surface is thereby pressurized by the extension male mold, and the portion which is pressed by the inclined surface thereof is formed into a tapered shape (or curved surface 28). 2 Thus, a piece of metal plate is formed by press working into a shape The bottomed cylindrical battery can 1 has an end portion of the inner surface of the bottom portion (4) adjacent to the end portion of the inner surface of the cylindrical portion (2 or 3) and has a curved corner portion (by the mitigation region D and the radius of curvature The inner diameter (27 or 28) of the curved surface of the crucible is larger as it is farther from the bottom. Therefore, it can be improved because the load concentrated on the endurance fault can be dispersed in the cone 200814402 shape 27 or the curved surface 28 is comprehensive. Damage to the D zone The following describes an embodiment of the battery can using the taper 27. [Embodiment] 5 Hereinafter, the damage strength of the battery can of the present embodiment and the conventional design article is compared. Describe the damage strength measurement method of the embodiment In the present embodiment, an aluminum battery can having a length of 41 [mm], a width of 40 [mm], and a height of 4.9 [mm] is used. As shown in the figure, by using a metallic cover 3 having a tubular pressurizing port 31 The mash 10 is connected to the upper opening of the battery can 1 to seal the battery can. Secondly, the reinforced compressed gas 32 is injected into the sealed battery can by the pressure port 31, so that the internal pressure of the battery can 1 rises and is measured. The pressure when the battery can 1 is damaged. Fig. 7 shows the measurement conditions of the battery can of the present embodiment. In the present embodiment, R = l. 〇 [mm], r = 0.6 [mm], and the short side wall 3 is used. The thickness of the plate is I5 〇.3 [inm], the thickness of the corner wall 7 is 〇.4 [mm], and the thickness of the side wall 2 of the long side is 〇.2 [mm]. In addition, the battery can of the present embodiment forms a cone with a cone height of 0.08 [mm] and a cone width of i.68 [mm] near the corner of the bottom portion 4. Comparison of uranium The battery can and the conventional product of the present embodiment were placed in 20 rows and 5 times, respectively, and the results thereof are shown in Table 1. Further, as for the conventional product, the thickness of the long side wall 2 is described as 〇.22 [mm] For reference. 11 200814402 [ 1] Battery can damage strength comparison table (Kgf7cm2) \ Long side wall thickness 0.2 2 [mm] | 0.2 [mm] 0.2 [mm] Conventional product "Kgf/cm2] The present invention [Kgf/cm2] Sample 1 28.5 7.5 28.5 Sample 2 26.0 8.5 26.5 Sample 3 32.5 8.0 30.0 Sample 4 26.5 8.0 29.5 Sample 5 29.5 9.5 28.0 Max 32.5 9.5 30.0 Min 26.0 7.5 26.5 Αν 28.6 8.3 28.5 Damage to the main body at the bottom of the main body according to Table 1, relative to The damage of the conventional product (plate thickness 〇.2[mm]) is strong
度為平均值8.3[Kgf7cm2]，本實施態樣之電池罐平均值為 28.5[Kgf/cm2]。由此可知，本實施態樣之電池罐可耐約3.4 倍之内壓。 接著，比較兩者損壞之處，相對於習知製品底部根處 損壞，本實施態樣之電池罐為主體部損壞，對内壓之耐力 之斷層部分則未遭損壞。此乃可與板厚較厚達0.22[mm]之 10 習知製品匹敵之結果。 另，因内壓造成之主體部之損壞是發生在材料延伸現 象之後。主體部之材料之延伸是較為穩定的，可藉由計算 而預測耐力。另一方面，底部根處之損壞乃因承受集中之 内壓而發生，所以與主體部之損壞強度相比，其損壞強度 15 明顯較低，難以預測（不能預測之嚴重損壞）。 根據前述結果，可以確認本實施態樣之電池罐，不論 是否具有與習知製品相同之外形及板厚，損壞強度均較習 12 200814402 知製品提昇。 另，本發明不限於前迷實施 發明目的之範圍内，適當變更者:，而是可在不變更本 用鋁製之電池罐，不過松:又，在貫施例中雖使 銀、鋼、鉑、黃銅、鐵二：限於此，亦可是例如：金、 璃等之無機材料或是該等物新L =、錄、鎂、陶兗、玻 定在電池罐，可利用在舉凡;受二且二本:明亦不限The average value is 8.3 [Kgf7cm2], and the average value of the battery can of the present embodiment is 28.5 [Kgf/cm2]. From this, it can be seen that the battery can of the present embodiment can withstand an internal pressure of about 3.4 times. Next, comparing the damage between the two, the battery can of the present embodiment is damaged to the main body portion, and the torn portion of the endurance against the internal pressure is not damaged as compared with the damage at the bottom of the conventional product. This is the result of comparison with 10 conventional products with a thickness of up to 0.22 [mm]. In addition, damage to the main body due to internal pressure occurs after the material is stretched. The extension of the material of the main body is relatively stable, and the endurance can be predicted by calculation. On the other hand, the damage at the bottom root occurs due to the internal pressure of the concentration, so the damage strength 15 is significantly lower than that of the main body, which is difficult to predict (unpredictable severe damage). Based on the above results, it was confirmed that the battery can of the present embodiment has the same shape and thickness as the conventional product, and the damage strength is improved as compared with the known product. In addition, the present invention is not limited to the scope of the foregoing object of the invention, and may be appropriately changed: but the battery can made of aluminum is not changed, but loose: in addition, in the embodiment, silver, steel, Platinum, brass, iron II: limited to this, it can also be, for example, inorganic materials such as gold or glass, or the new L =, recorded, magnesium, ceramic, and glass-based in battery cans, can be used in Two and two: no limit
10 1510 15
化之所有成形品。 必須輕濤化及輕量 心讯珂對有底角筒狀 不限定在此，亦可適用於例如圓筒狀、多=明，不過 V , ^ ^ - 夕角同狀之電池罐。 又本員_係說明有關 A 貝方也例，不過曲 面28之況也可獲得同樣的 依以上說明，採用本發明，由於可提升對内壓之耐力， 所以可防止較安全閥之作動壓力低之堡力損壞電池罐。 又，本發明對於逐年追求性能提昇且板厚有變薄傾向之電 池罐而言，係更為有效之工業設計。 【圖式簡單說^明】 第1 (A)〜（C)圖係顯示一般電池罐之外觀構造。 第2圖係第1圖之κ部分之放大圖。 第3(A)、（B)圖係顯示藉加壓加工形成之電池罐丄之 外形。 第4圖係本實施態樣之電池罐底部角附近之外觀—部 分的放大立體圖。 第5圖係第4圖之放大部分Μ之截面圖。 13 200814402 第6圖係說明本實施例之破壞強度之測量方法之圖。 第7圖顯示本實施例電池罐之測量條件。 【主要元件符號說明】 1電池罐 2長邊側壁 3短邊侧壁 4底壁 5長邊R壁 6短邊R壁 7角壁 11底壁4之板厚 12長邊侧壁2之板厚 20受到損壞部分 25錐形之高度 26錐形之寬度 27錐形 28曲面 30金屬性蓋體 31管狀加壓口 32加強壓縮氣體 14All molded products. It must be light and light. It is not limited to the bottomed corner. It can also be applied to, for example, a cylindrical, multi-bright, but V, ^ ^ - battery can with the same angle. In addition, the _ is a description of the A shell, but the same as the above description of the curved surface 28, according to the present invention, since the endurance against the internal pressure can be improved, the operating pressure of the safety valve can be prevented from being low. Fortune force damages the battery can. Further, the present invention is a more effective industrial design for a battery can which is expected to have improved performance and a tendency to have a thinner thickness. [Simple diagram of the figure] The first (A) to (C) diagrams show the appearance structure of a general battery can. Fig. 2 is an enlarged view of the κ portion of Fig. 1. Figures 3(A) and (B) show the appearance of a battery can formed by press working. Fig. 4 is an enlarged perspective view showing the appearance of a portion near the bottom corner of the battery can of the present embodiment. Fig. 5 is a cross-sectional view showing an enlarged portion of Fig. 4; 13 200814402 Fig. 6 is a view showing a method of measuring the breaking strength of the present embodiment. Fig. 7 shows the measurement conditions of the battery can of the present embodiment. [Main component symbol description] 1 battery can 2 long side wall 3 short side wall 4 bottom wall 5 long side R wall 6 short side R wall 7 corner wall 11 bottom wall 4 plate thickness 12 long side side wall 2 plate thickness 20 damaged portion 25 tapered height 26 tapered width 27 tapered 28 curved surface 30 metallic cover 31 tubular pressurized port 32 reinforced compressed gas 14