JP2001297739A - Battery, manufacturing method and welding method of battery - Google Patents
Battery, manufacturing method and welding method of batteryInfo
- Publication number
- JP2001297739A JP2001297739A JP2000113201A JP2000113201A JP2001297739A JP 2001297739 A JP2001297739 A JP 2001297739A JP 2000113201 A JP2000113201 A JP 2000113201A JP 2000113201 A JP2000113201 A JP 2000113201A JP 2001297739 A JP2001297739 A JP 2001297739A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- sealing member
- welding
- battery
- welded
- 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.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 87
- 239000000463 material Substances 0.000 claims abstract description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 16
- 238000003825 pressing Methods 0.000 claims description 9
- 239000003792 electrolyte Substances 0.000 claims description 8
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 239000008151 electrolyte solution Substances 0.000 claims 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 4
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 4
- 238000002347 injection Methods 0.000 description 29
- 239000007924 injection Substances 0.000 description 29
- 239000011255 nonaqueous electrolyte Substances 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Filling, Topping-Up Batteries (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池、電池の製造
方法及び溶接方法に関し、例えば角型形状のリチウムイ
オン蓄電池に適用することができる。本発明は、貫通孔
を覆うつばを有する封止部材を貫通孔に配置して溶接す
ることにより、例えばアルミニウム材により外装缶を構
成する場合でも確実に封止することができるようにす
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery, a battery manufacturing method and a welding method, and can be applied to, for example, a rectangular lithium ion storage battery. According to the present invention, a sealing member having a flange covering the through hole is arranged in the through hole and welded, so that even when the outer can is made of, for example, an aluminum material, it can be reliably sealed.
【０００２】[0002]
【従来の技術】従来、電池においては、正極、セパレー
タ、電解質等が外装缶及び端子板部によるケースに密封
されて作成されるようになされている。通常の角形電池
においては、このような密封の処理が外装缶に端子板部
を溶接して実行されるようになされ、この溶接の手法と
して、鉄材による外装缶及び端子板部を使用する場合に
は抵抗加熱の手法が適用され、ステンレス材による外装
缶及び端子板部を使用する場合にはレーザー溶接の手法
が適用されるようになされている。2. Description of the Related Art Conventionally, in a battery, a positive electrode, a separator, an electrolyte, and the like are produced by being sealed in a case formed by an outer can and a terminal plate. In a normal prismatic battery, such a sealing process is performed by welding a terminal plate portion to an outer can.As a method of this welding, when an outer can and a terminal plate portion made of an iron material are used. Is applied with a resistance heating method, and a laser welding method is used when an outer can and a terminal plate made of stainless steel are used.
【０００３】これに対してリチウムイオン二次電池など
の非水電解液を用いた電池にあっては、外装缶に非水電
解液を収納した状態でレーザー溶接すると、電解液が加
熱、燃焼する恐れがある。このためこの種の角形電池に
おいては、電解液以外の部材を収納した状態で外装缶及
び端子板部が溶接され、その後、電解液が注入されて密
封されるようになされている。On the other hand, in a battery using a non-aqueous electrolyte such as a lithium ion secondary battery, when the non-aqueous electrolyte is stored in an outer can by laser welding, the electrolyte is heated and burned. There is fear. For this reason, in this type of prismatic battery, the outer can and the terminal plate are welded in a state in which members other than the electrolyte are housed, and then the electrolyte is injected and sealed.
【０００４】すなわちこの種の角形電池においては、端
子板部に貫通孔による注入口が形成され、この注入口よ
り電解液が注入される。さらにこの注入口に封止部材で
ある球状部材が圧入された後、抵抗溶接により注入口の
内側壁面にこの球状部材が溶接され、これにより電解液
の液漏れ等が防止されるようになされている。That is, in this type of prismatic battery, an injection hole is formed in the terminal plate portion by a through hole, and an electrolyte is injected from the injection hole. Furthermore, after the spherical member serving as a sealing member is press-fitted into the injection port, the spherical member is welded to the inner wall surface of the injection port by resistance welding, thereby preventing leakage of the electrolyte and the like. I have.
【０００５】[0005]
【発明が解決しようとする課題】ところで電池にあって
は、重量を軽くする目的で、外装缶にアルミニウム材を
採用することが求められている。しかしながらリチウム
イオン二次電池などの非水電解液を用いた電池にあって
は、単に外装缶及び封止部材の材質をアルミニウム材に
切り換えただけでは注入口を確実に封止できない問題が
ある。By the way, in a battery, it is required to use an aluminum material for an outer can for the purpose of reducing the weight. However, in a battery using a non-aqueous electrolyte such as a lithium ion secondary battery, there is a problem that the inlet cannot be reliably sealed simply by switching the material of the outer can and the sealing member to aluminum.
【０００６】すなわちアルミニウム材においては、抵抗
溶接における溶接電流が流れ易く、かつ７００度以下の
低温で溶融することにより封止部材の形状が変化する。
これにより封止部材及び外装缶をアルミニウム材に切り
換えて従来手法により溶接したのでは、注入口に圧入し
た球状部材が予想外に変形し、注入口を完全に封止でき
ないことが判った。また注入口に封止部材を圧入した状
態でレーザー溶接により注入口の内側壁面と球状部材と
の溶接を試みたが、この場合も注入口を完全に封止でき
ないことが判った。因みに、このような封止の方法とし
て、他に超音波による接合の方法も考えられるが、この
ような構造に係るアルミニウム材を対象する場合には、
実用上、未だ不十分な問題がある。That is, in an aluminum material, a welding current in resistance welding easily flows, and the shape of the sealing member changes due to melting at a low temperature of 700 ° C. or less.
As a result, it was found that when the sealing member and the outer can were switched to an aluminum material and welded by the conventional method, the spherical member press-fitted into the injection port was unexpectedly deformed, and the injection port could not be completely sealed. In addition, welding of the inner wall surface of the injection port and the spherical member was attempted by laser welding with the sealing member being pressed into the injection port, but it was found that the injection port could not be completely sealed also in this case. By the way, as a method of such a sealing, a method of bonding by ultrasonic waves is also conceivable, but when targeting an aluminum material having such a structure,
There are still problems in practice.
【０００７】本発明は以上の点を考慮してなされたもの
で、例えばアルミニウム材により外装缶を構成する場合
でも確実に封止することができる電池、電池の製造方法
及び溶接方法を提案しようとするものである。The present invention has been made in view of the above points, and it is an object of the present invention to propose a battery, a method of manufacturing a battery, and a method of welding capable of securely sealing even when an outer can is made of, for example, an aluminum material. Is what you do.
【０００８】[0008]
【課題を解決するための手段】かかる課題を解決するた
め請求項１の発明においては、電池に適用して、貫通孔
に所定の封止部材が挿入された後、ケースに封止部材が
溶接されて貫通孔が封止され、この封止部材が、一端に
貫通孔より大型のつばを有し、他端に貫通孔に差し込ま
れる突起を有するようにする。According to the first aspect of the present invention, the present invention is applied to a battery, and after a predetermined sealing member is inserted into a through hole, the sealing member is welded to a case. Then, the through-hole is sealed, and the sealing member has a flange at one end larger than the through-hole and a projection at the other end to be inserted into the through-hole.
【０００９】また請求項５の発明においては、電池の製
造方法に適用して、貫通孔に所定の封止部材を挿入した
後、ケースに封止部材を溶接して貫通孔を封止し、この
封止部材が、一端に貫通孔より大型のつばを有し、他端
に貫通孔に差し込まれる突起を有するようにする。In a fifth aspect of the present invention, the method is applied to a method of manufacturing a battery, and after inserting a predetermined sealing member into a through hole, the sealing member is welded to a case to seal the through hole. The sealing member has a flange at one end larger than the through hole and a projection at the other end to be inserted into the through hole.
【００１０】また請求項１０の発明においては、溶接方
法に適用して、開口より大きい形状により封止部材を形
成し、開口に封止部材を配置して封止部材の輪郭に沿っ
たレーザービームの照射により、封止部材を溶接する。According to the tenth aspect of the present invention, the sealing member is formed in a shape larger than the opening by applying to the welding method, and the sealing member is arranged in the opening, and the laser beam is formed along the contour of the sealing member. , The sealing member is welded.
【００１１】請求項１の構成によれば、電池に適用し
て、封止部材が、一端に貫通孔のより大型のつばを有す
ることにより、この貫通孔より大きな部分で溶接すれ
ば、電解液の局所的な加熱を低減することができ、また
部材が溶融した場合であっても、充分な溶接しろを確保
することができる。これにより確実に貫通孔を封止する
ことができる。According to the first aspect of the present invention, when applied to a battery, the sealing member has a larger flange with a through hole at one end, so that welding is performed at a portion larger than the through hole. Local heating can be reduced, and even when the member is melted, a sufficient welding margin can be secured. Thereby, the through-hole can be reliably sealed.
【００１２】また請求項５の構成によれば、電池の製造
方法に適用して、封止部材が、一端に貫通孔の断面形状
より大型のつばを有することにより、この貫通孔より大
きな部分で溶接すれば、電解質の局所的な加熱を低減す
ることができ、また部材が溶融した場合であっても、充
分な溶接しろを確保することができる。これにより確実
に貫通孔を封止することができる。According to the fifth aspect of the present invention, the sealing member has a brim at one end larger than the cross-sectional shape of the through hole. By welding, local heating of the electrolyte can be reduced, and even when the members are melted, a sufficient welding margin can be secured. Thereby, the through-hole can be reliably sealed.
【００１３】また請求項１０の構成によれば、溶接方法
に適用して、開口より大きい形状により封止部材を形成
し、開口に封止部材を配置して封止部材の輪郭に沿った
レーザービームの照射により、封止部材を部材に溶接す
ることにより、充分な溶接しろを確保することができ、
これによりアルミニウム材による場合であっても、確実
に液漏れ等を防止して溶接することができる。According to a tenth aspect of the present invention, the sealing member is formed in a shape larger than the opening by applying to the welding method, and the sealing member is arranged in the opening, and the laser along the contour of the sealing member is formed. By irradiating the beam, the sealing member is welded to the member, so that a sufficient welding margin can be secured,
Thereby, even in the case of the aluminum material, the welding can be surely prevented while preventing the liquid leakage or the like.
【００１４】[0014]
【発明の実施の形態】以下、適宜図面を参照しながら本
発明の実施の形態を詳述する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１５】（１）実施の形態の構成 図１は、本発明の第１の実施の形態に係る電池の封止工
程を示す斜視図であり、図２は、図１の各工程の斜視図
をＡ−Ａ線に線により切り取って示す断面図である。こ
の実施の形態において、この封止工程は、外装缶２及び
端子板部３の組み立て工程、非水電解質の注入工程の後
工程であり、この封止工程の前工程に、又は途中の工程
に、適宜、予備充電の工程が設定される。なおここで外
装缶２及び端子板部３の溶接工程は、非水電解質を除く
正極、セパレータ等を外装缶２及び端子板部３に収納し
た後、外装缶２及び端子板部３の接合部をレーザー溶接
する工程である。また非水電解質の注入工程は、端子板
部３に形成された貫通孔である注入口３Ａから非水電解
質を注入する工程である。また予備充電の工程は、電池
１を予備的に充電する工程である。(1) Configuration of the Embodiment FIG. 1 is a perspective view showing a battery sealing step according to a first embodiment of the present invention, and FIG. 2 is a perspective view of each step of FIG. 1 is a cross-sectional view taken along line AA of FIG. In this embodiment, this sealing step is a step after the step of assembling the outer can 2 and the terminal plate portion 3 and the step of injecting the non-aqueous electrolyte. The pre-charging process is set as appropriate. Here, in the welding step of the outer can 2 and the terminal plate 3, the positive electrode, the separator, etc., excluding the non-aqueous electrolyte, are housed in the outer can 2 and the terminal plate 3, and then the joint of the outer can 2 and the terminal plate 3 is formed. Is a step of laser welding. In addition, the non-aqueous electrolyte injection step is a step of injecting the non-aqueous electrolyte from an injection port 3A which is a through hole formed in the terminal plate portion 3. The pre-charging step is a step of pre-charging the battery 1.
【００１６】ここで電池１において、外装缶２は、アル
ミニウムによる板材を打ち抜き加工して形成され、コー
ナーが面取りされた矩形形状の断面形状により形成され
る。端子板部３は、同様に、アルミニウム材に電極等を
配置して形成され、外装缶２の開口側を密閉する形状に
より形成される。これにより電池１は、組み立て工程に
おいて、非水電解質を除く正極、セパレータ等を外装缶
２及び端子板部３に収納した状態で、外装缶２及び端子
板部３がレーザー溶接により一体化されて、これら正
極、セパレータ等を外装缶２及び端子板部３に収納保持
するようになされている。Here, in the battery 1, the outer can 2 is formed by punching a plate material made of aluminum, and has a rectangular cross-sectional shape with chamfered corners. Similarly, the terminal plate portion 3 is formed by arranging electrodes and the like on an aluminum material, and is formed in a shape that seals the opening side of the outer can 2. Thus, in the battery 1, the outer can 2 and the terminal plate 3 are integrated by laser welding in a state where the positive electrode, the separator, and the like, excluding the non-aqueous electrolyte, are housed in the outer can 2 and the terminal plate 3 in the assembling process. The positive electrode, the separator, and the like are housed and held in the outer can 2 and the terminal plate 3.
【００１７】さらに端子板部３は、所定位置に、断面円
形形状の貫通孔による注入口３Ａが形成される。Further, the terminal plate portion 3 has an injection port 3A formed at a predetermined position by a through hole having a circular cross section.
【００１８】この封止工程では、図１（Ａ）において矢
印Ｂにより示すように、この注入口３Ａより僅かに大径
の球状部材である封止部材４がこの注入口３Ａに配置さ
れ（図２（Ａ））、その後、図１（Ｂ）において矢印Ｃ
により示すように、この封止部材４が図面にて上方より
押圧される。これによりこの工程では、封止部材４を塑
性変形させ、封止部材４の注入口３Ａ側に断面円形形状
の柱状突起を形成し、この突起を注入口３Ａに圧入す
る。また注入口３Ａの表面側については、封止部材４に
つばを形成し、このつばにより注入口３Ａの表面側を封
止部材４により覆い隠すようにする（図２（Ｂ））。In this sealing step, as shown by an arrow B in FIG. 1A, a sealing member 4 which is a spherical member slightly larger in diameter than the injection port 3A is arranged at the injection port 3A (see FIG. 1A). 2 (A)), and then arrow C in FIG. 1 (B).
As shown by, this sealing member 4 is pressed from above in the drawing. Thus, in this step, the sealing member 4 is plastically deformed to form a columnar projection having a circular cross section on the injection port 3A side of the sealing member 4, and this projection is pressed into the injection port 3A. A brim is formed on the sealing member 4 on the front side of the injection port 3A, and the front side of the injection port 3A is covered with the sealing member 4 by the brim (FIG. 2B).
【００１９】この工程では、このようにして封止部材４
を押圧した際に、封止部材４による突起が注入口３Ａに
充分に圧入されるように、また封止部材４のつばが充分
に広がって端子板部３の表面側と封止部材４とが充分に
重なり合うように、注入口３Ａの直径Ｄ１に対して封止
部材４の直径Ｄ２、押圧力が設定され、この実施の形態
ではこの直径Ｄ１及びＤ２がそれぞれ１．０〔ｍｍ〕及
び１．２〔ｍｍ〕に設定されるようになされている。In this step, the sealing member 4
Is pressed, the protrusion of the sealing member 4 is sufficiently pressed into the inlet 3A, and the brim of the sealing member 4 is sufficiently widened so that the surface side of the terminal plate portion 3 and the sealing member 4 Are set so that the diameter D2 of the sealing member 4 and the pressing force are set with respect to the diameter D1 of the inlet 3A so that the diameters D1 and D2 are 1.0 [mm] and 1 [mm], respectively. .2 [mm].
【００２０】続いてこの工程は、レーザービームの照射
により封止部材４が端子板部３に溶接される（図１
（Ｃ）及び図２（Ｃ））。このときこの工程は、図１
（Ｃ）において矢印Ｄにより示すように、封止部材４の
つばの輪郭に沿ったレーザービームの照射により溶接の
処理が実行され、このレーザービームの照射軌跡が封止
部材４の外形を２回周回するようにレーザービームが照
射される。これによりこの工程は、確実に封止できるよ
うになされている。なお予備充電工程をこの封止工程中
に設ける場合、封止部材４を押圧した後、電池１を予備
充電し、続いてこのようにレーザー溶接するようになさ
れている。Subsequently, in this step, the sealing member 4 is welded to the terminal plate portion 3 by laser beam irradiation (FIG. 1).
(C) and FIG. 2 (C)). At this time, this step is performed as shown in FIG.
As shown by an arrow D in (C), the welding process is performed by irradiating the laser beam along the contour of the brim of the sealing member 4, and the irradiation trajectory of the laser beam makes the outer shape of the sealing member 4 twice. A laser beam is irradiated so as to make a round. This ensures that this step can be sealed. When a pre-charging step is provided during the sealing step, the battery 1 is pre-charged after the sealing member 4 is pressed, and then the laser welding is performed in this manner.
【００２１】（２）実施の形態の動作 以上の構成において、電池１は（図１及び図２）、前工
程において、外装缶２及び端子板部３に非水電解質を除
く正極、セパレータ等が収納されて外装缶２及び端子板
部３がレーザー溶接により一体化される。その後、非水
電解質が注入された後、封止工程において、球状部材に
よる封止部材４が注入口３Ａに配置される。(2) Operation of the Embodiment In the above configuration, in the battery 1 (FIGS. 1 and 2), in the previous step, the outer can 2 and the terminal plate 3 were provided with a positive electrode, a separator, etc., excluding the nonaqueous electrolyte. The outer can 2 and the terminal plate 3 are housed and integrated by laser welding. Thereafter, after the non-aqueous electrolyte is injected, in a sealing step, the sealing member 4 made of a spherical member is arranged at the injection port 3A.
【００２２】その後、この封止部材４が押圧され、封止
部材４の塑性変形により注入口３Ａ側に柱状の突起が形
成され、この突起が注入口３Ａに圧入される。これによ
り電池１においては、ステーション間の移動等にあって
も、封止部材４の脱落を防止し、また液漏れを防止でき
るようになされている。Thereafter, the sealing member 4 is pressed, and a columnar projection is formed on the injection port 3A side by plastic deformation of the sealing member 4, and the projection is pressed into the injection port 3A. Thus, in the battery 1, even when the battery is moved between stations, the sealing member 4 can be prevented from falling off, and liquid leakage can be prevented.
【００２３】またこの封止部材４の押圧により、注入口
３Ａの表面側にて、封止部材４につばが形成され、この
つばより注入口３Ａが充分に覆い隠され、これにより続
くレーザービームによる溶接で、確実に封止することが
できるようになされている。すなわちこのように封止部
材４につばが形成された場合には、このつばの分を溶接
しろとすることができ、これにより封止部材４が溶融し
た場合でも、穴空き等の発生を防止することができる。By the pressing of the sealing member 4, a brim is formed in the sealing member 4 on the surface side of the injection port 3A, and the injection port 3A is sufficiently covered and concealed by the brim. , Welding can be reliably performed. That is, when the brim is formed in the sealing member 4 as described above, the brim can be used as a margin for welding, thereby preventing the occurrence of a hole or the like even when the sealing member 4 is melted. can do.
【００２４】また端子板部３と封止部材４との間の隙間
からのレーザービームの漏れ込みを確実に防止し、また
注入口３Ａ近傍の内側壁面に付着した非水電解質の極端
な加熱も防止することができることにより、レーザー溶
接時における非水電解質の蒸発を確実に防止することが
でき、このような蒸発による気体が溶接箇所より漏れ出
して発生する溶接箇所の微小な穴あきについても防止す
ることができる。従ってその分、アルミニウム材により
外装缶２等を構成する場合でも、確実に封止することが
できる。Further, the leakage of the laser beam from the gap between the terminal plate portion 3 and the sealing member 4 is reliably prevented, and the extreme heating of the non-aqueous electrolyte attached to the inner wall surface near the injection port 3A is also prevented. This prevents the non-aqueous electrolyte from evaporating during laser welding, and also prevents micro-perforations in the welding spot, which are generated when gas due to such evaporation leaks out of the welding spot. can do. Accordingly, even when the outer can 2 or the like is made of an aluminum material, the sealing can be reliably performed.
【００２５】すなわち電池１は、続いてこのようにして
形成された封止部材のつばの輪郭に沿ってレーザービー
ムが照射され、つばの分を溶接しろにしてレーザー溶接
される。このとき電池１は、レーザービームの照射軌跡
が２回周回するように、繰り返しレーザービーム照射さ
れ、これによってもさらに一段と確実に封止される。That is, the battery 1 is subsequently irradiated with a laser beam along the contour of the brim of the sealing member thus formed, and is welded with the brim being welded. At this time, the battery 1 is repeatedly irradiated with the laser beam so that the irradiation trajectory of the laser beam rotates twice, whereby the battery 1 is further securely sealed.
【００２６】かくするにつき、このように一端につばを
有し、他端に突起を有してなるピン形状に、事前に封止
部材を加工する場合あっては、封止部材を球形状に加工
する場合に比して、加工が困難で、その分、加工工数が
増大することになる。またこのようなピン形状による封
止部材を注入口３Ａに配置する場合にあっては、球形状
による封止部材４を配置する場合に比して、作業が煩雑
となる。これによりこの実施の形態においては、球形状
による封止部材４を注入口３Ａに配置した後、押圧によ
りピン形状に加工することにより、一段と簡易な工程に
より所望の形状による封止部材を注入口３Ａに配置して
確実に封止できるようになされている。When the sealing member is previously processed into a pin shape having a flange at one end and a projection at the other end, the sealing member is formed into a spherical shape. Processing is more difficult than processing, and the number of processing steps increases accordingly. In the case where such a pin-shaped sealing member is arranged at the injection port 3A, the operation becomes more complicated than when the spherical sealing member 4 is arranged. Thus, in this embodiment, after the sealing member 4 having a spherical shape is arranged at the injection port 3A, it is processed into a pin shape by pressing, so that the sealing member having a desired shape can be formed by a simpler process. 3A so as to be securely sealed.
【００２７】（３）実施の形態の効果 以上の構成によれば、一端に貫通孔を覆うつばを有し、
他端に突起を有する封止部材を貫通孔に配置してレーザ
ー溶接することにより、アルミニウム材により外装缶を
構成する場合でも確実に封止することができる。(3) Effects of the Embodiment According to the above configuration, one end has a brim covering the through hole,
By arranging a sealing member having a projection at the other end in the through hole and performing laser welding, it is possible to reliably seal even when the outer can is made of an aluminum material.
【００２８】またこのとき突起を貫通孔に圧入すること
により、ステーション間の移動等においても、封止部材
の脱落を防止し、また非水電解質の液漏れを確実に防止
することができる。At this time, by press-fitting the projection into the through hole, the sealing member can be prevented from falling off even during movement between stations, and the leakage of the non-aqueous electrolyte can be reliably prevented.
【００２９】また球形体の封止部材を押圧してピン形状
に加工すると共に、併せて貫通孔に封止部材を圧入する
ことにより、簡易な構成、工程により電池を封止するこ
とができる。Further, by pressing the spherical sealing member into a pin shape and pressing the sealing member into the through hole, the battery can be sealed with a simple configuration and process.
【００３０】（４）他の実施の形態 なお上述の実施の形態においては、球形状の封止部材を
貫通孔に配置して押圧することにより、ピン形状による
封止部材を注入口に配置する場合について述べたが、本
発明はこれに限らず、例えば図３に示すように、ピン形
状に加工してなる封止部材を注入口３Ａに差し込んだ
後、押圧してつばを広げるようにしてもよく、また図４
に示すようにつばを幅広に形成したピン形状による封止
部材を注入口３Ａに圧入するようにしてもよい。(4) Other Embodiments In the above embodiment, the pin-shaped sealing member is disposed at the injection port by placing the spherical sealing member in the through hole and pressing it. Although the case has been described, the present invention is not limited to this. For example, as shown in FIG. 3, after inserting a sealing member processed into a pin shape into the injection port 3A, the brim is expanded by pressing. FIG. 4
As shown in (1), a pin-shaped sealing member having a wide brim may be pressed into the injection port 3A.
【００３１】また上述の実施の形態においては、封止部
材の一端の突起を貫通孔に圧入する場合について述べた
が、本発明はこれに限らず、単に突起を位置決め用に利
用してもよく、この場合には、突起の圧入は不要とな
る。In the above-described embodiment, the case where the protrusion at one end of the sealing member is press-fitted into the through-hole has been described. However, the present invention is not limited to this, and the protrusion may be simply used for positioning. In this case, it is not necessary to press the projections.
【００３２】また上述の実施の形態においては、封止部
材を電極板材に溶接する場合について述べたが、本発明
はこれに限らず、図５に斜視図及び断面図を示すよう
に、外装缶に電極板材を溶接する場合にも広く適用する
ことができる。この場合、外装缶の開口より大きい形状
により溶接部材である電極板材を形成して開口に配置
し、この電極板材の輪郭に沿ってレーザービームを照射
することにより、確実に溶接することができる。In the above-described embodiment, the case where the sealing member is welded to the electrode plate material has been described. However, the present invention is not limited to this, and as shown in a perspective view and a sectional view in FIG. It can be widely applied to the case where the electrode plate is welded. In this case, the electrode plate, which is a welding member, is formed in a shape larger than the opening of the outer can and is arranged in the opening. By irradiating a laser beam along the contour of the electrode plate, welding can be surely performed.
【００３３】また上述の実施の形態においては、断面円
形形状の貫通孔を封止する場合について述べたが、本発
明はこれに限らず、断面矩形形状の貫通孔を封止する場
合等にも広く適用することができる。In the above-described embodiment, the case where the through hole having a circular cross section is sealed has been described. However, the present invention is not limited to this, and the present invention is also applicable to the case where a through hole having a rectangular cross section is sealed. Can be widely applied.
【００３４】また上述の実施の形態においては、レーザ
ー溶接により貫通孔を封止する場合について述べたが、
本発明はこれに限らず、プラズマ溶接、アーク溶接等、
種々の溶接方法により溶接する場合に広く適用すること
ができる。In the above embodiment, the case where the through hole is sealed by laser welding has been described.
The present invention is not limited to this, plasma welding, arc welding, etc.
It can be widely applied when welding by various welding methods.
【００３５】[0035]
【発明の効果】上述のように本発明によれば、貫通孔を
覆うつばを有する封止部材を貫通孔に配置して溶接する
ことにより、例えばアルミニウム材により外装缶を構成
する場合でも確実に封止することができる。As described above, according to the present invention, a sealing member having a brim covering a through-hole is disposed in the through-hole and welded, so that, for example, even when an outer can is made of an aluminum material, the outer can is reliably formed. Can be sealed.
【図１】本発明の実施の形態に係る電池の封止工程を示
す斜視図である。FIG. 1 is a perspective view showing a battery sealing step according to an embodiment of the present invention.
【図２】図１の各斜視図をＡ−Ａ線により切り取って示
す断面図である。FIG. 2 is a cross-sectional view showing each perspective view of FIG. 1 cut along line AA.
【図３】他の実施の形態に係る電池の説明に供する断面
図である。FIG. 3 is a cross-sectional view for explaining a battery according to another embodiment.
【図４】図３とは異なる他の実施の形態に係る電池の説
明に供する断面図である。FIG. 4 is a cross-sectional view for explaining a battery according to another embodiment different from FIG. 3;
【図５】外装缶に電極板材を溶接する場合の説明に供す
る斜視図及び断面図である。FIG. 5 is a perspective view and a cross-sectional view for explaining a case where an electrode plate is welded to an outer can.
１……電池、２……外装缶、３……電極板材、４……封
止部材DESCRIPTION OF SYMBOLS 1 ... Battery, 2 ... Outer can, 3 ... Electrode plate material, 4 ... Sealing member
───────────────────────────────────────────────────── フロントページの続き (72)発明者 寺山 秋宣 福島県郡山市日和田町高倉字下杉下１番地 の１ 株式会社ソニー・エナジー・テック 内 (72)発明者 渡辺 勝久 福島県郡山市日和田町高倉字下杉下１番地 の１ 株式会社ソニー・エナジー・テック 内 Ｆターム(参考） 5H011 AA17 BB03 CC06 DD13 FF06 JJ04 5H023 AA03 AS01 CC11 CC14 5H029 BJ02 CJ03 CJ05 DJ02 DJ03 EJ01 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akinori Terayama 1-1, Shimosugishita, Takakura, Hiwada-cho, Koriyama-shi, Fukushima Prefecture Inside Sony Energy Tech Co., Ltd. (72) Inventor Katsuhisa Watanabe, Koriyama-shi, Fukushima Prefecture No. 1 Shimosugishita, Takakura, Wadamachi F-term within Sony Energy Tech Co., Ltd. (Reference) 5H011 AA17 BB03 CC06 DD13 FF06 JJ04 5H023 AA03 AS01 CC11 CC14 5H029 BJ02 CJ03 CJ05 DJ02 DJ03 EJ01
Claims (10)
貫通穴より電解質を注入した後、前記貫通孔を封止して
作成される電池であって、 前記貫通孔に所定の封止部材が挿入された後、前記ケー
スに前記封止部材が溶接されて前記貫通孔が封止され、 前記封止部材は、 一端に前記貫通孔より大型のつばを有し、 他端に前記貫通孔に差し込まれる突起を有することを特
徴とする電池。1. A battery formed by injecting an electrolyte from a through hole formed in a case made of an aluminum material and sealing the through hole, wherein a predetermined sealing member is inserted into the through hole. After that, the sealing member is welded to the case to seal the through hole, and the sealing member has a brim larger than the through hole at one end, and is inserted into the through hole at the other end. A battery having a projection.
とを特徴とする請求項１に記載の電池。2. The battery according to claim 1, wherein the protrusion is press-fitted into the through hole.
形成されることを特徴とする請求項１に記載の電池。3. The sealing member according to claim 1, wherein the through hole has a circular cross section, and the sealing member is formed by pressing a spherical member having a larger diameter than the through hole against the through hole. The battery according to 1.
電池。4. The battery according to claim 1, wherein said welding is laser welding.
貫通穴より電解液を注入した後、前記貫通孔を封止する
電池の製造方法であって、 前記貫通孔に所定の封止部材を挿入した後、前記ケース
に前記封止部材を溶接して前記貫通孔を封止し、 前記封止部材は、 一端に前記貫通孔より大型のつばを有し、 他端に前記貫通孔に差し込まれる突起を有することを特
徴とする電池の製造方法。5. A method for manufacturing a battery, wherein an electrolytic solution is injected from a through hole formed in a case made of an aluminum material, and then the through hole is sealed, wherein a predetermined sealing member is inserted into the through hole. Thereafter, the sealing member is welded to the case to seal the through hole, the sealing member has a flange at one end larger than the through hole, and a projection inserted into the through hole at the other end. A method for producing a battery, comprising:
孔に押圧して前記封止部材を形成することを特徴とする
請求項５に記載の電池の製造方法。7. The method according to claim 5, wherein the sealing member is formed by pressing a spherical member having a diameter larger than that of the through hole into the through hole.
電池の製造方法。8. The method according to claim 5, wherein the welding is laser welding.
の照射位置を複数回周回させ、前記レーザービームによ
り前記ケースに前記封止部材を溶接することを特徴とす
る請求項５に記載の電池の製造方法。9. The battery according to claim 5, wherein the irradiation position of the laser beam is rotated a plurality of times along the outer shape of the collar, and the sealing member is welded to the case by the laser beam. Manufacturing method.
接することにより、前記溶接部材で前記開口を塞ぐ溶接
方法において、 前記開口より大きい形状により前記溶接部材を形成し、 前記開口に前記溶接部材を配置して前記溶接部材の輪郭
に沿ったレーザービームの照射により、前記溶接部材を
前記部材に溶接することを特徴とする溶接方法。10. A welding method in which a welding member is welded to a member having a rectangular opening to close the opening with the welding member, wherein the welding member is formed in a shape larger than the opening, and the welding is performed on the opening. A welding method, comprising arranging a member and welding the welding member to the member by irradiating a laser beam along a contour of the welding member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000113201A JP2001297739A (en) | 2000-04-10 | 2000-04-10 | Battery, manufacturing method and welding method of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000113201A JP2001297739A (en) | 2000-04-10 | 2000-04-10 | Battery, manufacturing method and welding method of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001297739A true JP2001297739A (en) | 2001-10-26 |
Family
ID=18625217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000113201A Pending JP2001297739A (en) | 2000-04-10 | 2000-04-10 | Battery, manufacturing method and welding method of battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001297739A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2006035597A1 (en) * | 2004-09-30 | 2008-05-15 | トヨタ自動車株式会社 | Sealed battery and method for manufacturing sealed battery |
| JP2008544445A (en) * | 2005-06-17 | 2008-12-04 | 深▲せん▼市比克電池有限公司 | Lithium ion battery flat, battery housing and battery |
| US7666548B2 (en) | 2004-01-27 | 2010-02-23 | Samsung Sdi Co., Ltd. | Can type secondary battery |
| KR101222255B1 (en) * | 2006-03-09 | 2013-01-15 | 삼성에스디아이 주식회사 | Secondary battery |
-
2000
- 2000-04-10 JP JP2000113201A patent/JP2001297739A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7666548B2 (en) | 2004-01-27 | 2010-02-23 | Samsung Sdi Co., Ltd. | Can type secondary battery |
| JPWO2006035597A1 (en) * | 2004-09-30 | 2008-05-15 | トヨタ自動車株式会社 | Sealed battery and method for manufacturing sealed battery |
| US7857867B2 (en) | 2004-09-30 | 2010-12-28 | Toyota Jidosha Kabushiki Kaisha | Sealed battery and method of manufacturing the sealed battery |
| JP4640340B2 (en) * | 2004-09-30 | 2011-03-02 | トヨタ自動車株式会社 | Sealed battery and method for manufacturing sealed battery |
| JP2008544445A (en) * | 2005-06-17 | 2008-12-04 | 深▲せん▼市比克電池有限公司 | Lithium ion battery flat, battery housing and battery |
| KR101222255B1 (en) * | 2006-03-09 | 2013-01-15 | 삼성에스디아이 주식회사 | Secondary battery |
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