JPH04144054A - Manufacture of cylindrical battery - Google Patents
Manufacture of cylindrical batteryInfo
- Publication number
- JPH04144054A JPH04144054A JP2266364A JP26636490A JPH04144054A JP H04144054 A JPH04144054 A JP H04144054A JP 2266364 A JP2266364 A JP 2266364A JP 26636490 A JP26636490 A JP 26636490A JP H04144054 A JPH04144054 A JP H04144054A
- Authority
- JP
- Japan
- Prior art keywords
- sealing
- diameter
- electrode
- cylindrical battery
- outer diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 238000007789 sealing Methods 0.000 claims abstract description 87
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 18
- 238000002788 crimping Methods 0.000 claims description 13
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011149 active material Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 3
- 238000010276 construction Methods 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は円筒形電池の製造方法に関する。[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a method for manufacturing a cylindrical battery.
（従来の技術）
従来、円筒形電池の製造では次のような封口がなされて
いる。まず、電極群を収納した外装缶の開口端近傍に内
側に突出するように折曲げられた段部を形成する。次い
で、前記外装缶内の段部上方部に枠状の絶縁封口体を介
して封口蓋を嵌入した後、カシメ用型を圧接することに
よって段部上端から開口端までの外装缶を折曲げて前記
封口蓋をカシメ固定して密封口する。このようにして形
成された円筒形電池の封口部は、段部上端から開口端ま
での外装缶が枠状の絶縁封口体を介して封口蓋をカシメ
固定して密封口した構造となっている。(Prior Art) Conventionally, in the manufacture of cylindrical batteries, the following sealing methods have been used. First, a stepped portion that is bent to protrude inward is formed near the open end of the outer can housing the electrode group. Next, a sealing lid is fitted into the upper part of the stepped part in the outer can via a frame-shaped insulating sealing body, and then the outer can is bent from the upper end of the stepped part to the opening end by pressing a crimping mold. The sealing lid is caulked and fixed to seal the opening. The sealing part of the cylindrical battery formed in this way has a structure in which the outer can from the upper end of the stepped part to the open end is sealed by caulking and fixing the sealing lid through a frame-shaped insulating sealing body. .
しかしながら、前記方法で製造された円筒形電池の封口
部は、カシメ用型の圧接により折曲げられた外装缶のス
プリングバック（カシメ用型が離れた時にそれまで受け
ていた圧力に対して元の形状に戻ろうとすること）によ
って、その外径が拡大する。このため、前記封口部の外
径は、外装缶の胴部（段部下方の電極群を収納している
部分）よりも大きくなる。従って、円筒形電池の大きさ
は実装上の理由から最大外径寸法によって規制されるた
め、前述したように封口部の外径が前記胴部よりも大き
い電池では、電極群が収納されている前記胴部を最大外
径とすることができず、該胴部の容積が低減して電極群
の容積効率が低くなるこのようなことから、電極群の容
積効率の向上を目的として、前記封口部の外径が前記胴
部よりも大きい円筒形電池を筒状の治具内に挿通させる
ことにより、封口部の外径を外装缶の胴部と同一程度に
まで縮小させる方法が提案されている（特開昭６１−２
６９８４９号）。However, the sealing part of the cylindrical battery manufactured by the above method does not recover from the springback of the outer can that is bent due to pressure contact with the crimping die (when the crimping die is separated from the original pressure). (trying to return to its shape), its outer diameter expands. Therefore, the outer diameter of the sealing portion is larger than the body portion of the outer can (the portion housing the electrode group below the stage). Therefore, the size of a cylindrical battery is regulated by the maximum outer diameter dimension for mounting reasons, so as mentioned above, in batteries where the outer diameter of the sealing part is larger than the body part, the electrode group is housed. Because the body cannot have the maximum outer diameter, the volume of the body decreases, and the volumetric efficiency of the electrode group decreases.Therefore, for the purpose of improving the volumetric efficiency of the electrode group, the sealing A method has been proposed in which the outer diameter of the sealing part is reduced to the same extent as the body of the outer can by inserting a cylindrical battery whose outer diameter is larger than the body into a cylindrical jig. (Unexamined Japanese Patent Publication No. 61-2
No. 69849).
しかしながら、前記方法では封口部が径方向に縮小する
のと同時に長さ方向にも変形するため、該封口部のカシ
メ固定に緩みが生じる。このため、密封性が著しく低下
するという問題点がある。However, in the method described above, the sealing part shrinks in the radial direction and is also deformed in the length direction at the same time, so that the caulking of the sealing part becomes loose. Therefore, there is a problem in that the sealing performance is significantly reduced.
一方、電極群の有効容積の増大及び電池寸法の安定化を
目的として、前記円筒形電池の段部を潰し、電池の長手
寸法を縮小する方法も提案されている（特開昭５８−１
７８９６８号）。しかしながら、かかる方法では、前記
封口部及び段部直下の外装缶が変形して外径が拡大する
という問題点がある。On the other hand, for the purpose of increasing the effective volume of the electrode group and stabilizing the battery dimensions, a method has also been proposed in which the step part of the cylindrical battery is crushed to reduce the battery's longitudinal dimension (Japanese Patent Laid-Open No. 58-1
No. 78968). However, this method has a problem in that the outer can directly below the sealing part and the stepped part is deformed and the outer diameter increases.
（発明が解決しようとする課題）
本発明は従来の問題点を解決するためになされたもので
、電極群の容積効率が高く、しがち密封性が良好な円筒
形電池を製造し得る方法を提供しようとするものである
。(Problems to be Solved by the Invention) The present invention has been made in order to solve the conventional problems, and provides a method for manufacturing a cylindrical battery with high volumetric efficiency of the electrode group and good sealing performance. This is what we are trying to provide.
［発明の構成］
（課題を解決するための手段）
本発明は、電極群を収納した外装缶の開口端近傍に内側
に突出するように折曲げられた段部を形成すると共に、
この段部上端から開口端までの外装缶径を縮小する工程
と、前記外装缶内の段部上方部に枠状の絶縁封口体を介
して封口蓋を嵌入した後、カシメ用型を圧接して段部上
端から開口端までの外装缶を内側に折曲げ、前記封口蓋
をカシメ固定して前記段部上に封口部を形成する工程と
を具備することを特徴とする円筒形電池の製造方法であ
る。[Structure of the Invention] (Means for Solving the Problems) The present invention includes forming a stepped portion bent inwardly in the vicinity of the open end of an outer can housing an electrode group, and
After reducing the diameter of the outer can from the upper end of the step to the opening end and fitting a sealing lid to the upper part of the step inside the outer can via a frame-shaped insulating sealing body, a crimping mold is press-fitted. manufacturing a cylindrical battery, comprising: folding the outer can inward from the upper end of the stepped portion to the open end; and crimping and fixing the sealing lid to form a sealing portion on the stepped portion. It's a method.
前記外装缶は、上方が開口した鉄等の金属缶などからな
る。The exterior can is a metal can made of iron or the like with an open top.
前記電極群は、通常、二酸化マンガン等を活物質とする
正極、不織布等からなるセパレータ、及びリチウム、ナ
トリウム等を活物質とする負極からなる。なお、電解液
は、通常、前記外装缶に段部を形成した後に注液する。The electrode group usually includes a positive electrode made of manganese dioxide or the like as an active material, a separator made of nonwoven fabric or the like, and a negative electrode made of lithium, sodium, or the like as an active material. Note that the electrolytic solution is usually injected after forming a stepped portion in the outer can.
前記段部上端から開口端までの外装缶径を縮小する度合
は、通常、次工程のカシメ用型での圧接後に生じる封口
部外径の拡大分に合わせて設定する。The degree to which the outer can diameter is reduced from the upper end of the stepped portion to the open end is usually set in accordance with the increase in the outer diameter of the sealing portion that occurs after pressure contact with the crimping die in the next step.
本発明に係る別の発明は、電極群を収納した外装缶の開
口端近傍に内側に突出するように折曲げられた段部を形
成すると共に、この段部上端から開口端までの外装缶径
を縮小する工程と、前記外装缶内の段部上方部に枠状の
絶縁封口体を介して封口蓋を嵌入した後、カシメ用型を
圧接して段部上端から開口端までの外装缶を内側に折曲
げ、前記封口蓋をカシメ固定して前記段部上に封口部を
形成する工程と、前記封口部を押圧して前記段部を潰す
工程と、前記外装缶及び封口部を筒状の治具内に挿通し
、拡大した段部直下の外装缶径を縮小する工程とを具備
することを特徴とする円筒形電池の製造方法である。Another invention related to the present invention is to form a stepped portion bent inwardly in the vicinity of the open end of the outer can housing the electrode group, and the diameter of the outer can from the upper end of the stepped portion to the open end. After fitting a sealing lid to the upper part of the stepped part in the outer can via a frame-shaped insulating sealing body, a crimping mold is press-fitted to close the outer can from the upper end of the stepped part to the opening end. a step of bending inward and caulking and fixing the sealing lid to form a sealing portion on the step portion; a step of pressing the sealing portion to crush the step portion; and a step of forming the outer can and the sealing portion into a cylindrical shape. This method of manufacturing a cylindrical battery is characterized by comprising the step of inserting the battery into a jig and reducing the diameter of the outer can directly below the enlarged step.
前記本発明に係る別の発明の製造方法において、前記段
部上端から開口端までの外装缶径を縮小する度合は、通
常、次工程のカシメ用型での圧接後に生じる封口部外径
の拡大分、及び段部を潰した時の封口部外径の拡大分に
合わせて設定する。In the manufacturing method of another invention according to the present invention, the degree to which the diameter of the outer can from the upper end of the stepped portion to the opening end is reduced is usually determined by the enlargement of the outer diameter of the sealing portion that occurs after pressure contact with the crimping die in the next step. and the expansion of the outer diameter of the sealing part when the stepped part is collapsed.
（作用）
本発明の製造方法は、まず、電極群を収納した外装缶の
開口端近傍に内側に突出するように折曲げられた段部を
形成すると共に、この段部上端から開口端までの外装缶
の径を縮小する。つづいて、前記外装缶内の段部上方部
に枠状の絶縁封口体を介して封口蓋を嵌入した後、カシ
メ用型を圧接して段部上端から開口端までの外装缶を内
側に折曲げることによって、段部上端から開口端までの
外装缶が枠状の絶縁封口体を介して封口蓋をカシメ固定
した構造の封口部を形成した円筒形電池が製造される。(Function) In the manufacturing method of the present invention, first, a stepped portion that is bent to protrude inward is formed near the open end of an outer can housing an electrode group, and a step portion is formed from the upper end of the stepped portion to the open end. Reduce the diameter of the outer can. Subsequently, a sealing lid is fitted into the upper part of the step in the outer can via a frame-shaped insulating sealing member, and then a crimping mold is pressed to fold the outer can from the upper end of the step to the opening end inward. By bending, a cylindrical battery is manufactured in which the outer can from the upper end of the stepped portion to the open end forms a sealing portion having a structure in which the sealing lid is caulked and fixed via a frame-shaped insulating sealing member.
このような電池の製造において、カシメ用型での圧接後
に外装缶のスプリングバックにより前記封口部の外径が
拡大するが、前記封口部となる外装缶部分の径は予め電
極群が収納される外装缶の胴部よりも縮小されている。In the manufacture of such batteries, the outer diameter of the sealing portion expands due to the springback of the outer can after pressure contact with the crimping mold, but the diameter of the outer can portion that becomes the sealing portion is set in advance so that the electrode group is accommodated. It is smaller than the body of the outer can.
このため、°前記スプリングバックによる封口部の外径
拡大を相殺でき、該封口部の外径が外装缶の胴部よりも
大きくなるのを防止できる。また、従来のように円筒形
電池を筒状の治具内に挿通させるという封口部の縮径加
工を施す必要もなく、封口部の密封性を良好に維持でき
る。従って、電極群を収納している外装缶の胴部を最大
外径とすることができるため電極群の容積効率が高く、
しかも密封性が良好な円筒形電池を製造できる。Therefore, the expansion of the outer diameter of the sealing portion due to the springback can be offset, and it is possible to prevent the outer diameter of the sealing portion from becoming larger than the body of the outer can. Further, there is no need to reduce the diameter of the sealing part by inserting the cylindrical battery into a cylindrical jig as in the past, and the sealing performance of the sealing part can be maintained satisfactorily. Therefore, since the body of the outer can housing the electrode group can have the maximum outer diameter, the volumetric efficiency of the electrode group is high.
Furthermore, a cylindrical battery with good sealing performance can be manufactured.
また、前述した方法の各工程により封口部を形成した後
、更に前記封口部を押圧して前記段部を潰す。この時、
前記外装缶の長手寸法が縮小され、更に前記封口部の外
径が変形して拡大されると共に段部直下の外装缶の外径
も変形して拡大される。Further, after the sealing portion is formed by each step of the method described above, the sealing portion is further pressed to crush the stepped portion. At this time,
The longitudinal dimension of the outer can is reduced, and the outer diameter of the sealing portion is deformed and enlarged, and the outer diameter of the outer can immediately below the stepped portion is also deformed and enlarged.
つづいて、前記外装缶及び封口部を筒状の治具内に挿通
し、拡大した段部直下の外装缶径を縮小して円筒形電池
を製造する。このような電池の製造において、前記封口
部となる外装缶部分の径を予め縮小する操作を、前記段
部を潰した時に前記封口部の外径が拡大する分も見込ん
で行なうことにより、前記段部を潰した時の封口部の外
径拡大を相殺でき、該封口部の外径が外装缶の胴部（拡
大した段部直下を除く）よりも大きくなるのを防止でき
る。その結果、この後に外装缶及び封口部を筒状の治具
内に挿通させることによって、前記封口部を変形させる
ことなく、拡大した段部直下の外装缶の外径のみを拡大
前と同程度にまで縮小させることかできる。従って、電
極群を収納している外装缶の胴部を最大外径とすること
ができる共に段部による空間が圧縮されるため、電極群
の容積効率がより向上し、しかも密封性が良好な円筒形
電池を製造できる。Subsequently, the outer can and the sealing part are inserted into a cylindrical jig, and the diameter of the outer can directly below the enlarged step is reduced to produce a cylindrical battery. In manufacturing such a battery, the diameter of the outer can portion that becomes the sealing portion is preliminarily reduced by taking into account the expansion of the outer diameter of the sealing portion when the step portion is crushed. The expansion of the outer diameter of the sealing portion when the stepped portion is crushed can be offset, and the outer diameter of the sealing portion can be prevented from becoming larger than the body of the outer can (excluding the area directly below the enlarged stepped portion). As a result, by subsequently inserting the outer can and the sealing part into a cylindrical jig, only the outer diameter of the outer can directly below the enlarged stepped part can be reduced to the same level as before the enlargement, without deforming the sealing part. It can be reduced to . Therefore, the body of the outer can that houses the electrode group can have the maximum outer diameter, and the space created by the stepped portion is compressed, which further improves the volumetric efficiency of the electrode group and provides good sealing. Cylindrical batteries can be manufactured.
（実施例）
以下、本発明を円筒形リチウム電池の製造に適用した例
について図面を参照して詳細に説明する。(Example) Hereinafter, an example in which the present invention is applied to manufacturing a cylindrical lithium battery will be described in detail with reference to the drawings.
実施例１
まず、第１図に示すように上方が開口した有底円筒形の
外装缶ｌを作製する。前記外装缶１はニッケルメッキを
施した０、３■厚の鉄板からなり、その外径は１６．０
ｍｍである。つづいて、前記外装缶１内に、電極群２を
下側絶縁板３と上側絶縁板４とに挟んで収納する。前記
電極群２は、二酸化マンガンを生活物質とする正極板５
、セパレータ６、及び金属リチウムからなる負極板７を
積層し、渦巻状に巻回した構造になっている。なお、こ
の電極群２の上側には正極板５から導出された正極り一
ド８が突出している。Example 1 First, as shown in FIG. 1, a cylindrical outer can l with a bottom and an open top is prepared. The outer can 1 is made of a nickel-plated iron plate with a thickness of 0.3 cm, and its outer diameter is 16.0 mm.
It is mm. Subsequently, the electrode group 2 is sandwiched between the lower insulating plate 3 and the upper insulating plate 4 and stored in the outer can 1 . The electrode group 2 includes a positive electrode plate 5 containing manganese dioxide as a living material.
, a separator 6, and a negative electrode plate 7 made of metal lithium are stacked and spirally wound. Incidentally, a positive electrode plate 8 led out from the positive electrode plate 5 projects from the upper side of this electrode group 2.
次いて、同第１図に示すように、前記外装缶ｌの上下を
上型９及び下型ｌＯで挾んで保持し、これら上下型９．
１０により外装缶１を回転させながら該外装缶１の開口
端近傍に段部形成ローラ１１を圧接する。前記段部形成
ローラ１１は、円柱状の下部ブロックｌｌａと、前記下
部ブロックｌｌａ上に一体化され、外周面が該下部ブロ
ックｌｌａよりも外側に１．２ｍｍ突出した中太円柱状
の中間ブロックｌｌｂと、前記中間ブロックｌｌｂ上に
一体化され、前記下部ブロックｌｌａよりも外周径が０
．０５ａ＋ａ＋大きい上部ブロックｌｌｃとから構成さ
れている。このような工程により、外装缶ｌは、第２図
に示すように開口端近傍に内側に突出するように折曲げ
られた段部１ａが形成されると共に、段部１ａ上端から
開口端までの外径Ａが該外装缶１の胴部１ｂの外径Ｂ
（１６，０ＩＩＩＩ）よりも０．０５ｍｍ小さい１５．
９５ａｍに縮小される。Next, as shown in FIG. 1, the upper and lower parts of the outer can 1 are held between an upper mold 9 and a lower mold 1O, and these upper and lower molds 9.
10, while rotating the outer can 1, a step forming roller 11 is pressed into contact with the vicinity of the open end of the outer can 1. The step forming roller 11 includes a cylindrical lower block lla, and a medium-thick cylindrical intermediate block llb that is integrated on the lower block lla and whose outer peripheral surface protrudes 1.2 mm outward from the lower block lla. is integrated on the intermediate block llb, and has an outer circumferential diameter of 0 than that of the lower block lla.
．． It is composed of 05a+a+large upper block llc. Through these steps, the outer can 1 has a stepped portion 1a that is bent inwardly protruding near the opening end, as shown in FIG. The outer diameter A is the outer diameter B of the body 1b of the outer can 1.
15.0.05mm smaller than (16,0III).
It will be reduced to 95am.
次いで、前記外装缶１内に電解液を注入した後、安全弁
（図示せず）を内装した封口蓋１２の底面に前記正極リ
ード８を抵抗溶接により固定する。つづいて、前記外装
缶ｌ内における段部１ａの上方部に枠状の絶縁封口体１
３を介して前記封口蓋１２を嵌入する。ひきつづき、前
記外装缶１の外側の段部１ａにクリンプ下型１４の突起
部を係合させて当接した後、上下動するカシメ用型のク
リンプ上型１５を前記外装缶１の上方から下降させて圧
接して段部ｌａ上端から開口端までの外装缶１を内側に
折曲げて前記封口蓋１２をカシメ固定する（第３図図示
）このような工程により、第４図に示すように、封口部
１６の外径Ｃが、折曲げられた外装缶ｌのスプリングバ
ックによって０．０５＋ｕ＋拡大して外装缶ｌの胴部ｉ
ｂの外径Ｂと同じ１６．０１となった円筒形電池１７が
得られる。Next, after injecting the electrolytic solution into the outer can 1, the positive electrode lead 8 is fixed by resistance welding to the bottom surface of the sealing lid 12, which is equipped with a safety valve (not shown). Next, a frame-shaped insulating sealing body 1 is attached to the upper part of the step part 1a in the outer can l.
3, and insert the sealing lid 12 therethrough. Subsequently, after the protrusion of the lower crimp die 14 is engaged and brought into contact with the outer stepped portion 1a of the outer can 1, the upper crimp die 15, which is a crimping die that moves up and down, is lowered from above the outer can 1. The outer can 1 from the upper end of the stepped portion la to the open end is bent inward by pressure contact, and the sealing lid 12 is crimped and fixed (as shown in Fig. 3). Through this process, as shown in Fig. 4, , the outer diameter C of the sealing part 16 expands by 0.05+u+ due to the springback of the bent outer can l, and becomes the body part i of the outer can l.
A cylindrical battery 17 having an outer diameter of 16.01 mm, which is the same as the outer diameter B of b, is obtained.
このようにして得られた円筒形電池１７は、電極群を収
納している外装缶Ｉの胴部１ｂの外径Ｂが最大外径とな
るため、電極群の容積効率が向上されていた。しかも、
前記封口部１６の外径Ｃを縮小する加工を施す必要がな
く、密封性が良好に維持されていた。In the thus obtained cylindrical battery 17, the outer diameter B of the body 1b of the outer can I housing the electrode group was the maximum outer diameter, so the volumetric efficiency of the electrode group was improved. Moreover,
There was no need to perform processing to reduce the outer diameter C of the sealing portion 16, and the sealing performance was maintained well.
実施例２
ます、段部形成ローラとして上部ブロックが下部ブロッ
クよりも外周径が０．１−大きいのものを用いた以外、
実施例１と同様な方法を行なう。これにより、外装缶の
段部上端から開口端までの外径を胴部の外径（１６，０
＋ａａ＋）よりも０．ｌＯ■１小さい１５．９０＋ｕ＋
に縮小する工程を経た後、第５図に示すように、封口部
１６の外径Ｃが、折曲げられた外装缶１のスプリングバ
ックによって０．０５■拡大して外装缶１の胴部１ｂの
外径Ｂより０ 、０５ａｇ小さいＩ５．５Ｉとなった円
筒形電池１７か得られる。Example 2 Except for using a step forming roller in which the outer diameter of the upper block is 0.1-larger than that of the lower block.
A method similar to Example 1 is carried out. As a result, the outer diameter of the outer can from the upper end of the step to the opening end is set to the outer diameter of the body (16,0
+aa+) than 0. lO■1 small 15.90+u+
After going through the process of reducing the size to 1, as shown in FIG. A cylindrical battery 17 having an I5.5I which is 0.05ag smaller than the outer diameter B of the cylindrical battery 17 is obtained.
次いで、第６図に示すように、外装缶ｌの底部に受型１
８を係合させた後、上下動するバンチ１９を封口部Ｉ６
上に下降させて該封口部１Ｂを押圧して段部１ａを潰す
。このような工程により、第７図に示すように、段部１
ａが潰れて外装缶１の長手寸法が縮小され、更に封口部
Ｉ６の外径Ｃが０．０５ａｍ拡大して外装缶１の胴部１
ｂの外径Ｂと同じ１Ｂ、ｏｍ−となると共に、外装缶１
の段部１ａ直下の外径りも拡大して１６．０Ｏｓｏ＋よ
り大きくなった円筒形電池体Ｉ７が得られる。Next, as shown in FIG. 6, a mold 1 is placed on the bottom of the outer can 1.
8, the vertically moving bunch 19 is moved to the sealing part I6.
It is lowered upward and presses the sealing part 1B to crush the stepped part 1a. Through such a process, as shown in FIG.
a is crushed, the longitudinal dimension of the outer can 1 is reduced, and the outer diameter C of the sealing part I6 is further enlarged by 0.05 am, and the body part 1 of the outer can 1 is
It becomes 1B, om-, which is the same as the outer diameter B of b, and the outer diameter of the outer can 1
The outer diameter immediately below the stepped portion 1a is also enlarged, resulting in a cylindrical battery body I7 having a diameter larger than 16.0 Oso+.
次いで、第８図に示すように、外装缶１及び封口部１６
を筒状の治具である内径１６ 、 Ｏａ＋ｉの筒状ダイ
ス２０内に挿通ずる。このような工程により、前記封口
部１６は変形することな（、拡大した外装缶ｌの段部１
ａ直下の外径りのみが１６．Ｏｍｍに縮小した円筒形電
池が得られる。Next, as shown in FIG. 8, the outer can 1 and the sealing part 16 are
is inserted into a cylindrical die 20, which is a cylindrical jig and has an inner diameter of 16 mm and an Oa+i diameter. Through this process, the sealing part 16 is not deformed (the step part 1 of the enlarged outer can l).
Only the outer diameter directly below a is 16. A cylindrical battery with a size down to 0 mm is obtained.
このようにして得られた円筒形電池は、電極群を収納し
ている外装缶の胴部が最大外径となると共に段部による
空間も圧縮されているため、電極群の容積効率がより向
上されていた。しかも封口部の密封性が良好に維持され
ていた。In the cylindrical battery obtained in this way, the body of the outer can housing the electrode group has the maximum outer diameter, and the space due to the stepped portion is also compressed, which further improves the volumetric efficiency of the electrode group. It had been. Moreover, the sealing performance of the sealing portion was maintained well.
［発明の効果］
以上詳述した如く、本発明によれば電極群の容積効率が
高く、しかも密封性か良好な円筒形電池を製造し得る方
法を提供することができる。[Effects of the Invention] As detailed above, according to the present invention, it is possible to provide a method for manufacturing a cylindrical battery in which the volumetric efficiency of the electrode group is high and the sealing performance is good.
第１図〜第４図は実施例１の円筒形電池の製造工程を示
す説明図、第５図〜第８図は実施例２の円筒形電池の製
造工程を示す説明図である。
■・・・外装缶、１ａ・・・段部、２・・・電極群、１
１・・・段部形成ローラ、１２・・・封口蓋、１３・・
・枠状の絶縁封口体、１５・・・クリンプ上型（カシメ
用型）、１６・・・封口部、１７・・円筒形電池、１９
・・・パンチ、２ｏ・・・筒状ダイス（筒状の治具）。1 to 4 are explanatory diagrams showing the manufacturing process of the cylindrical battery of Example 1, and FIGS. 5 to 8 are explanatory diagrams showing the manufacturing process of the cylindrical battery of Example 2. ■...Outer can, 1a...Stepped portion, 2...Electrode group, 1
1... Step forming roller, 12... Sealing lid, 13...
・Frame-shaped insulating sealing body, 15... Crimp upper mold (caulking type), 16... Sealing part, 17... Cylindrical battery, 19
... Punch, 2o... Cylindrical die (cylindrical jig).
Claims (2)
出するように折曲げられた段部を形成すると共に、この
段部上端から開口端までの外装缶径を縮小する工程と、
前記外装缶内の段部上方部に枠状の絶縁封口体を介して
封口蓋を嵌入した後、カシメ用型を圧接して段部上端か
ら開口端までの外装缶を内側に折曲げ、前記封口蓋をカ
シメ固定して前記段部上に封口部を形成する工程とを具
備することを特徴とする円筒形電池の製造方法。(1) forming a step bent to protrude inward near the open end of the outer can housing the electrode group, and reducing the diameter of the outer can from the upper end of the step to the open end;
After fitting a sealing lid to the upper part of the stepped part in the outer can via a frame-shaped insulating sealing body, a crimping mold is press-fitted to bend the outer can from the upper end of the stepped part to the open end inward, and the above-mentioned A method for manufacturing a cylindrical battery, comprising the step of caulking and fixing a sealing lid to form a sealing portion on the stepped portion.
出するように折曲げられた段部を形成すると共に、この
段部上端から開口端までの外装缶径を縮小する工程と、
前記外装缶内の段部上方部に枠状の絶縁封口体を介して
封口蓋を嵌入した後、カシメ用型を圧接して段部上端か
ら開口端までの外装缶を内側に折曲げ、前記封口蓋をカ
シメ固定して前記段部上に封口部を形成する工程と、前
記封口部を押圧して前記段部を潰す工程と、前記外装缶
及び封口部を筒状の治具内に挿通し、拡大した段部直下
の外装缶径を縮小する工程とを具備することを特徴とす
る円筒形電池の製造方法。(2) forming a step bent to protrude inward near the open end of the outer can housing the electrode group, and reducing the diameter of the outer can from the upper end of the step to the open end;
After fitting a sealing lid to the upper part of the stepped part in the outer can via a frame-shaped insulating sealing body, a crimping mold is press-fitted to bend the outer can from the upper end of the stepped part to the open end inward, and the above-mentioned A step of caulking and fixing the sealing lid to form a sealing portion on the stepped portion, a step of pressing the sealing portion to crush the step portion, and a step of inserting the outer can and the sealing portion into a cylindrical jig. A method for manufacturing a cylindrical battery, comprising the steps of: and reducing the diameter of the outer can directly below the enlarged step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2266364A JP2916236B2 (en) | 1990-10-05 | 1990-10-05 | Manufacturing method of cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2266364A JP2916236B2 (en) | 1990-10-05 | 1990-10-05 | Manufacturing method of cylindrical battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04144054A true JPH04144054A (en) | 1992-05-18 |
| JP2916236B2 JP2916236B2 (en) | 1999-07-05 |
Family
ID=17429919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2266364A Expired - Fee Related JP2916236B2 (en) | 1990-10-05 | 1990-10-05 | Manufacturing method of cylindrical battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2916236B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001059856A1 (en) | 2000-02-09 | 2001-08-16 | Ngk Insulators, Ltd. | Lithium secondary cell and method for producing the same |
| JP2006012702A (en) * | 2004-06-29 | 2006-01-12 | Shin Kobe Electric Mach Co Ltd | Manufacturing method of sealed battery |
| DE102004059446A1 (en) * | 2004-12-09 | 2006-06-22 | Epcos Ag | Housing for electrochemical cells e.g. capacitor, has recess formed at its side wall and forming contact surface, and cover for hermetically sealing housing cup, where side wall is part of cup from plastically deformable material |
| KR100749477B1 (en) * | 2006-02-21 | 2007-08-14 | 삼성에스디아이 주식회사 | Jig for welding cap plate of secondary battery |
| JP2016072102A (en) * | 2014-09-30 | 2016-05-09 | 株式会社Ｇｓユアサ | Power storage element, and method of manufacturing the same |
| CN114830414A (en) * | 2019-12-18 | 2022-07-29 | 三洋电机株式会社 | Cylindrical battery |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7320758B2 (en) * | 2018-04-06 | 2023-08-04 | パナソニックＩｐマネジメント株式会社 | battery module |
-
1990
- 1990-10-05 JP JP2266364A patent/JP2916236B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001059856A1 (en) | 2000-02-09 | 2001-08-16 | Ngk Insulators, Ltd. | Lithium secondary cell and method for producing the same |
| US6884541B2 (en) | 2000-02-09 | 2005-04-26 | Ngk Insulators, Ltd. | Lithium secondary battery and manufacturing method thereof |
| EP2533322A3 (en) * | 2000-02-09 | 2013-03-27 | NGK Insulators, Ltd. | Lithium secondary battery and manufacturing method thereof |
| JP2006012702A (en) * | 2004-06-29 | 2006-01-12 | Shin Kobe Electric Mach Co Ltd | Manufacturing method of sealed battery |
| JP4561199B2 (en) * | 2004-06-29 | 2010-10-13 | 新神戸電機株式会社 | Manufacturing method of sealed battery |
| DE102004059446A1 (en) * | 2004-12-09 | 2006-06-22 | Epcos Ag | Housing for electrochemical cells e.g. capacitor, has recess formed at its side wall and forming contact surface, and cover for hermetically sealing housing cup, where side wall is part of cup from plastically deformable material |
| KR100749477B1 (en) * | 2006-02-21 | 2007-08-14 | 삼성에스디아이 주식회사 | Jig for welding cap plate of secondary battery |
| JP2016072102A (en) * | 2014-09-30 | 2016-05-09 | 株式会社Ｇｓユアサ | Power storage element, and method of manufacturing the same |
| CN114830414A (en) * | 2019-12-18 | 2022-07-29 | 三洋电机株式会社 | Cylindrical battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2916236B2 (en) | 1999-07-05 |
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