JPH03203157A - Manufacture of sealed battery - Google Patents
Manufacture of sealed batteryInfo
- Publication number
- JPH03203157A JPH03203157A JP1340820A JP34082089A JPH03203157A JP H03203157 A JPH03203157 A JP H03203157A JP 1340820 A JP1340820 A JP 1340820A JP 34082089 A JP34082089 A JP 34082089A JP H03203157 A JPH03203157 A JP H03203157A
- Authority
- JP
- Japan
- Prior art keywords
- hollow rivet
- rivet
- hollow
- packing
- hole
- 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 10
- 238000012856 packing Methods 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims description 18
- 230000006835 compression Effects 0.000 abstract description 7
- 238000007906 compression Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 19
- 238000010586 diagram Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004830 Super Glue Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- FGBJXOREULPLGL-UHFFFAOYSA-N ethyl cyanoacrylate Chemical compound CCOC(=O)C(=C)C#N FGBJXOREULPLGL-UHFFFAOYSA-N 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000003860 storage 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)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
ニッケルーカドミウム蓄電池等の封口蓋に安全弁機構を
備えた密閉式電池の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method for manufacturing a sealed battery such as a nickel-cadmium storage battery having a safety valve mechanism on the lid.
（ロ）１足来の技術
従来、密閉式電池の封目方法は、円筒外装缶の開孔部近
傍に形成した溝部に、安全弁機構を有する電池蓋をパッ
キングを介して組み１わせ、前記外装缶をかしめること
によってパッキングを圧縮し密封するものが一般的であ
る。しかし、過早、電池を用いるポータプル機器の需要
の増加に伴い、電池の小型化、高容量化が図られ、電池
形状においても円筒形状のみならず、角型形状の電池も
見られるようになってきた。角型形状の電池においては
、上記のような封目方法を採用するのは難しく、蓋板の
透孔部に安全弁機構を有する電池端子を外装缶にレーザ
ー溶接等の方法により密閉固定する方法（例えば実開昭
６２−１６７３６８号公報参照）がある。これは、パッ
キングを介して蓋板の透孔部に中空リベットを通し、リ
ベット下端部をかしめることによって固定し、この中空
リベットに安全弁機構を持つ電池端子部を溶接する方法
が一般的に用いられる。(b) Conventional technology The conventional method for sealing a sealed battery is to assemble a battery cover with a safety valve mechanism into a groove formed near the opening of a cylindrical outer can through a packing, and then Generally, the can is caulked to compress and seal the packing. However, as demand for portable devices using batteries increased, batteries became smaller and had higher capacities, and batteries began to be shaped not only cylindrical but also square. It's here. For prismatic batteries, it is difficult to use the sealing method described above, so a method of sealingly fixing the battery terminal, which has a safety valve mechanism in the through hole of the lid plate, to the outer can using a method such as laser welding is recommended. For example, see Japanese Utility Model Application No. 62-167368). This is generally done by passing a hollow rivet through the hole in the cover plate through the packing, fixing it by caulking the lower end of the rivet, and then welding the battery terminal section with a safety valve mechanism to this hollow rivet. It will be done.
円筒形状電池におけるかしめ方法では、外装缶が外側か
らの力によって押し曲げられ、蓋板との間に挟まれたパ
ッキングが圧縮されることによって密封される。−・方
、中空リベットを用いる方法では、当然のことながら内
側からの力によって中空リベットを変形させ、やはり蓋
板との間に介されたパッキングが圧縮されて密封される
。前記せる実開昭６２−１．６７３６８号公報には、中
空リベットの一般的なかしめ方法を応用した例が記され
ている（第４図参照）。In the caulking method for cylindrical batteries, the outer can is pressed and bent by force from the outside, and the packing sandwiched between the can and the lid plate is compressed and sealed. - On the other hand, in the method using a hollow rivet, the hollow rivet is naturally deformed by a force from inside, and the packing interposed between it and the lid plate is compressed and sealed. The above-mentioned Japanese Utility Model Publication No. 62-1.67368 describes an example in which a general method of caulking hollow rivets is applied (see FIG. 4).
従来の円筒形電池の如く、外側からの力によってかしめ
る方法では、外装缶を覆う形態の頑丈な金型を用いるこ
とができ、安定した加工寸法が得られる。一方、内側か
らかし、ぬる方法では、細いポンチを用いる必要があり
、また、加工対象が蓋板透孔部に入る中空１）ベットで
あって、微小な部品となること等から、密閉式電池が要
求する気密性が得られにくい。その結果、電池製造工程
における「漏液による不良率」が前者に比べて高いとい
う問題点がある。In the method of caulking by applying force from the outside, as in conventional cylindrical batteries, a sturdy mold that covers the outer can can be used, and stable processing dimensions can be obtained. On the other hand, in the method of staking and filling from the inside, it is necessary to use a thin punch, and the object to be processed is a hollow 1) bed that enters the through-hole of the lid plate, which is a minute part. It is difficult to obtain the airtightness required by batteries. As a result, there is a problem in that the "defect rate due to liquid leakage" in the battery manufacturing process is higher than that of the former.
（ハ）発明が解決しようとする課題
本発明は前記問題点に鑑みてなされたものであって、蓋
板の透孔部に配置された中空リベットのような微小な部
品を用いる場合であっても、精度よくかしめることがで
き、密閉性の優れた安全弁機構を備えた密閉式電池の製
造方法を提供するものである。(c) Problems to be Solved by the Invention The present invention has been made in view of the above-mentioned problems, and is applicable to cases in which minute parts such as hollow rivets placed in the through-holes of the cover plate are used. The present invention also provides a method for manufacturing a sealed battery that can be caulked with high precision and is equipped with a safety valve mechanism that has excellent sealing properties.
（ニ）発明が解決しようとする課題
本発明は、透孔部を有する蓋板と、電池の一極性端子を
構成する中空リベットと、前記透孔部に配置され前記中
空リベフトを前記蓋板から絶縁する絶縁パッキングと、
前記中空リベ・ントの下端部に配置され且つ前記パ・ン
キングを介して前記蓋板に前記中空リベットをかしめ固
定するワ・ンシャーとからなる密閉構造を有する密閉式
電池の製造方法であって、前記中空リベ・ソトの内径よ
り大きい外径を有する先細のポンチを、前記中空リベッ
トに押入して、該中空リベ・ソトの外側面に存在せるバ
・ソキングを前記中空リベ・ン）・の外側面と前記蓋板
の透孔部内周部とで圧縮する第１工程と、前記中空リベ
ｙ Ｉ・のつば部と前記着板、及び前記蓋板と前記中空
リペア １・の下端部に配置された前記ワッシャーとで
、荊記パ・ノキングを圧縮する第２工程とからなること
を特徴とするものである。(d) Problems to be Solved by the Invention The present invention provides a lid plate having a through hole, a hollow rivet that constitutes a unipolar terminal of a battery, and a hollow rivet arranged in the through hole that separates the hollow rivet from the lid plate. Insulating packing to insulate;
A method for manufacturing a sealed battery having a sealed structure comprising a washer disposed at the lower end of the hollow rivet and caulking and fixing the hollow rivet to the lid plate via the punching, A tapered punch having an outer diameter larger than the inner diameter of the hollow rivet is pushed into the hollow rivet so that the bar sock present on the outer surface of the hollow rivet is removed from the outside of the hollow rivet. A first step of compressing between the side surface and the inner circumferential portion of the through-hole of the lid plate, a flange portion of the hollow reveyor I. and the mounting plate, and a lower end portion of the lid plate and the hollow repair portion 1. The method is characterized by comprising a second step of compressing the washer with the washer.
また、前記第１工程において、Ｏ１ｊ記中空り・くント
の拡開部分が、前記蓋板の透孔部よりも前記中空リベッ
トの下端部側に存在するようにするのが望ましい。Further, in the first step, it is preferable that the expanded portion of the hollow rivet in O1j is located closer to the lower end of the hollow rivet than the through hole of the cover plate.
（ホ）作用
本来、中空リベットは、その先端部即ちド端部を押し広
げ、中空リベットのつば部方向に押しつけかしめること
により、圧接固定されるものてあり、その際、中空部が
外周方向に向かって若−Ｆ膨れる。しかし、電池を完全
密閉するためには中空リペア １・の変形量と同時にパ
ッキングの圧縮量を正確にコントロールする必要がある
。(E) Function Essentially, a hollow rivet is fixed by pressure contact by pushing out its tip, that is, the end, and pressing and caulking it toward the collar of the hollow rivet. Waka-F bulges towards. However, in order to completely seal the battery, it is necessary to accurately control the amount of deformation of the hollow repair 1. and the amount of compression of the packing.
このため、かしめ工程を２段階とし、まず第１工程で蓋
板透孔部の内周部と中空リベット外側面に挟持された部
分のパッキングの圧縮量をコントロールし、次いで、第
２工程で蓋板の上下に位置する部分のバンキングの圧縮
量をコントロールする。For this reason, the caulking process is performed in two stages.First, in the first process, the amount of compression of the packing in the area sandwiched between the inner periphery of the hole in the cover plate and the outer surface of the hollow rivet is controlled, and then, in the second process, the amount of compression of the packing in the area sandwiched between the inner circumference of the hole in the cover plate and the outer surface of the hollow rivet is controlled. Controls the amount of compression of the banking at the top and bottom of the board.
この場合、第２工程で中空リベット下端を単にフランジ
状に蓋板方向に押しつけると、中空リベットは第１ｒ、
程で径を拡大された代置を支点にして変形しやすい。そ
の結果、この位置が蓋板の透孔部内周部と近接する位置
の場合は、第１工程で圧縮された蓋板の透孔部内周部と
リベット外側面の間のパッキングを緩ませることなり、
密閉性を低下させることがあった。In this case, if the lower end of the hollow rivet is simply pressed in the direction of the cover plate like a flange in the second step, the hollow rivet will be
It is easy to deform using the substitute whose diameter has been expanded in the fulcrum as a fulcrum. As a result, if this position is close to the inner periphery of the hole in the cover plate, the packing between the inner periphery of the hole in the cover plate and the outer surface of the rivet, which was compressed in the first step, will be loosened. ,
The airtightness could be reduced.
しかし、中空リベットの径の拡大部分を、リベット下端
から蓋板の透孔部の内周部下端に近接する位置迄にして
おくことにより、第２工程ではこの位置を支点に中空リ
ベットが変形しても、蓋板の透孔部内周部とリベット外
側面で挟持されたパッキングには影響がなく、安定した
気密性を保持することができる。However, by setting the enlarged diameter part of the hollow rivet from the lower end of the rivet to a position close to the lower end of the inner periphery of the through-hole part of the cover plate, the hollow rivet deforms around this position as a fulcrum in the second step. However, the packing sandwiched between the inner periphery of the hole in the cover plate and the outer surface of the rivet is not affected, and stable airtightness can be maintained.
（へ）実施例
以下に、実施例として角形のニッケルーカドミウム電池
を密閉式電池に用いた場合につき、詳述する。(F) Example The following is a detailed description of a case where a square nickel-cadmium battery is used as a sealed battery as an example.
（第１実施例）
第１図乃至第３図はいずれも本発明による封口構造の要
部断面図であり、第１図は第１工程における封口構造の
説明図、第２図は第２工程における封口構造の説明図、
第３図は、本発明の製造方法により製造された安全弁機
構を示す要部縦断面図である。(First Example) FIGS. 1 to 3 are all cross-sectional views of essential parts of the sealing structure according to the present invention, FIG. 1 is an explanatory diagram of the sealing structure in the first step, and FIG. An explanatory diagram of the sealing structure in
FIG. 3 is a longitudinal cross-sectional view of a main part showing a safety valve mechanism manufactured by the manufacturing method of the present invention.
先づ、中空リベット１の外側面外径と同一寸法の内径を
有する上パ・ソキング２を、前記中空リベット１に装着
する。これを蓋板９の中央部に形成した透孔部に配置し
、下パッキング４と、正極集電部材を兼ねるワッシャ５
とを組合せる。そして、これを押え金型６．７に組み込
み、中空リベットの内径ｄ１より大きい外径（ｄ、）部
分８ａを有する先細のポンチ８Ａを（ポンチの先端はｄ
、より小さい径である）を、前記中空リベフト１の中空
部内に挿入する。そして、ポンチ８Ａの、中空リベット
の内径ｄ、より大きい外径部分８ａが、蓋板の透孔部の
下端部９ａよりも、前記中空ノベットの下端部側に止ま
るよう、ポンチ８Ａの上動の位置を刺部してかしめを行
い、第１工程とする。この第１工程によって、中空り・
ごット１の外側面に存在そるパッキング２ａを、ｌ１１
１記中空リベツト１の外側面と、蓋板９の透孔部の内周
部とで、圧縮されるようにする（第１図参照）。First, the upper padding 2 having the same inner diameter as the outer diameter of the outer surface of the hollow rivet 1 is attached to the hollow rivet 1. This is placed in a through hole formed in the center of the cover plate 9, and a lower packing 4 and a washer 5 which also serves as a positive electrode current collecting member are attached.
Combine with. Then, this is assembled into the presser mold 6.7, and a tapered punch 8A having an outer diameter (d) portion 8a larger than the inner diameter d1 of the hollow rivet (the tip of the punch is d
, of smaller diameter) is inserted into the hollow part of the hollow lift lift 1. Then, the upward movement of the punch 8A is adjusted so that the outer diameter portion 8a of the punch 8A, which is larger than the inner diameter d of the hollow rivet, stops closer to the lower end of the hollow knot than the lower end 9a of the through hole of the cover plate. The position is punctured and caulked, which is the first step. Through this first step, hollow and
The warped packing 2a existing on the outer surface of the bag 1 is
1. The outer surface of the hollow rivet 1 and the inner periphery of the through hole of the cover plate 9 are compressed (see FIG. 1).
次に、中空リベツ）−１の下端部１ａのかしめを、第１
工程で用いたポンチ８Ａとは異なる形状を有するポンチ
８Ｂを用い、第２工程とし“Ｃ行なう（第２図参照）。Next, caulk the lower end 1a of the hollow rivet)-1 with the first
A second step "C" is carried out using a punch 8B having a shape different from the punch 8A used in the step (see FIG. 2).
このポンチ８Ｂの、中段の外径部分８１）の径ｄ３は、
前記ｄ、より少し小さくなっている。この第２工程によ
って、中空リベットｌのつば部１ｂと蓋板９、及び、前
記蓋板９と前記中空リベットの下端部１ａに配置された
ワッシャー５とで」ニパッキング２及び下パッキング４
を、上下方向に加圧圧縮し、密閉構造とする。The diameter d3 of the middle outer diameter portion 81) of this punch 8B is:
It is slightly smaller than d above. Through this second step, the collar portion 1b of the hollow rivet l and the cover plate 9, and the cover plate 9 and the washer 5 disposed on the lower end portion 1a of the hollow rivet are assembled into the upper packing 2 and the lower packing 4.
is compressed under pressure in the vertical direction to form a sealed structure.
尚、中空リベット１の下端部１ａは、ポンチ８Ｂの水平
部８Ｃで加圧され、中空リベット１の上端部であるつば
部１ｂが押え金型７で保持されているから、前記下端部
１ａが水平方向に変形される。Note that the lower end portion 1a of the hollow rivet 1 is pressurized by the horizontal portion 8C of the punch 8B, and the collar portion 1b, which is the upper end portion of the hollow rivet 1, is held by the presser die 7, so that the lower end portion 1a is Deformed horizontally.
そして、中空リベット］のつば部１ｂに、ゴム弁１０を
内部に装着した端子蓋１１を溶接固定し、正極端子を構
成した。Then, a terminal cover 11 with a rubber valve 10 mounted therein was welded and fixed to the collar portion 1b of the hollow rivet, thereby forming a positive terminal.
一方、セパレータを介して、正、負極を組み合せた極板
群】２を用い、この正極タブ１３に、リード板１４の一
端を溶接固定した。これを角柱状の外装釘３に神人後、
ｉ′ｉｉ記正極タブ１３を保護する樹脂製のスペーサ１
５を極板群１２上に配置し、濃度３０％のＫＯＨからな
る電解液をここに注液した。そして、電池蓋のワッシャ
ー５の折曲部５ａに、前記リード板１４の他端部を溶接
１−た。次に、歪板９の外周９ａが、外装缶３開口部の
端面３ａに内接するよう嵌合、配置し、この嵌合部をＹ
ＡＧレーザーにて溶接し、密閉した。On the other hand, one end of the lead plate 14 was fixed by welding to the positive electrode tab 13 using the electrode plate group 2 which was a combination of positive and negative electrodes with a separator interposed therebetween. After applying this to the prismatic exterior nail 3,
i'ii Resin spacer 1 that protects the positive electrode tab 13
5 was placed on the electrode plate group 12, and an electrolytic solution consisting of KOH with a concentration of 30% was poured therein. Then, the other end of the lead plate 14 was welded to the bent portion 5a of the washer 5 of the battery cover. Next, the outer periphery 9a of the strain plate 9 is fitted and arranged so as to be inscribed in the end surface 3a of the opening of the outer can 3, and this fitting part is
It was welded and sealed using an AG laser.
尚、前記端子蓋］１、中空リベットｌ、蓋板９、ワッシ
ャー５、リード板１４、外装缶３は、いずれも冷間圧延
鋼板にニッケルメッキしたものであり、上パッキング２
、下パッキング４、スペーサー１５は、ナイロン６−６
、ポンチ８Ａ、ポンチ８Ｂ、押え金型６．７は、超硬合
金がら構成されている。The terminal lid 1, the hollow rivet 1, the lid plate 9, the washer 5, the lead plate 14, and the outer can 3 are all made of cold-rolled steel plate plated with nickel, and the upper packing 2
, the lower packing 4 and the spacer 15 are made of nylon 6-6.
, punch 8A, punch 8B, and presser die 6.7 are made of cemented carbide.
このようにして、本発明による密閉型電池を作製した。In this way, a sealed battery according to the present invention was produced.
（比較例）
次に、比較例として第１工程で使用せるポンチ８Ａ及び
第２工程で使用せるポンチ８Ｂの形状を、第５図（ポン
チ１８Ａ）及び第６図（ポンチ１８Ｂ）のように変更し
、かしめを行って電池蓋を作製したものを得た。(Comparative Example) Next, as a comparative example, the shapes of the punch 8A used in the first step and the punch 8B used in the second step were changed as shown in Fig. 5 (punch 18A) and Fig. 6 (punch 18B). Then, a battery cover was obtained by caulking.
本発明電池と異なる点は、第１工程における先細のポン
チの径大になる部分１８ａが、ポンチの先端により近く
なっている。その結果、中空リベット〕における内径の
拡開部分１ｃが、蓋板９の下端部９ａよりも、−Ｅ側（
中空リベット１のつば部１１）側）に形成されており、
また第２工程においても、前記拡開部分１ｃの変形が最
大となるので、中空リベット１の最大内径部分１ｅが蓋
板９の透孔部近傍に形成され、中空リベット１の下端部
ｌａ側に存在しない。The difference from the battery of the present invention is that the diameter-increasing portion 18a of the tapered punch in the first step is closer to the tip of the punch. As a result, the enlarged inner diameter portion 1c of the hollow rivet is located on the −E side (
It is formed on the collar part 11) side of the hollow rivet 1,
Also in the second step, since the deformation of the expanded portion 1c is maximum, the maximum inner diameter portion 1e of the hollow rivet 1 is formed near the through hole of the cover plate 9, and the lower end portion la side of the hollow rivet 1 is formed. not exist.
このようにして、比較電池を作製した。In this way, a comparative battery was produced.
このようにして作製した本発明電池と比較電池とを用い
、これらの封口構造の密閉性を比較した。このテストは
各電池を１００個ずつ用意し、これら電池の安全弁部分
であるゴム弁１０と中空ノベット１のつば部】ｂを、シ
アノアクリレート系接着剤で固定し、安全弁として作動
できないようにした後、電池の極性を逆に接続して０
、２ ＣｍＡの電流で６０分間充電するというものであ
る。このようにすることで、電池の正極がらは水素ガス
が、：ｉ極からは酸素ガスが発生して、電池の内部圧が
上昇しかしめ部分から電解液が漏液する、この有無を確
認するというものである。The thus produced batteries of the present invention and comparative batteries were used to compare the sealing properties of their sealing structures. This test was conducted by preparing 100 batteries of each type, and fixing the rubber valve 10 and the brim of the hollow Novet 1 with cyanoacrylate adhesive to prevent them from operating as a safety valve. , connect the battery with the polarity reversed and set it to 0.
, 2 CmA of current for 60 minutes. By doing this, hydrogen gas is generated from the battery's positive electrode, and oxygen gas is generated from the i-electrode, increasing the internal pressure of the battery and leaking electrolyte from the clamped part.Check for the presence or absence of this. That is what it is.
この結果を、第１表に示す。The results are shown in Table 1.
第 １ 表
これより本発明電池の漏液発生数が少なく、この密閉構
造が優れたものであることが理解できる。Table 1 From this table, it can be seen that the number of occurrences of leakage in the battery of the present invention is small, and this sealed structure is excellent.
このように、中空リベットは元来がしめると同時にその
中空部が径方向外側に向がって広がるものであるが、密
閉式電池に必要な密閉性を確保するためには、パッキン
グの圧縮量及び圧縮部分をコントロールしなければなら
ず、特に蓋板透孔内周部とリベット外周面の間のパッキ
ングの緩みを防ぐことで、密閉性が極めて向上すること
が分が１
２
る。In this way, a hollow rivet originally tightens and the hollow part expands radially outward, but in order to ensure the sealing required for sealed batteries, the amount of compression of the packing must be adjusted. It is necessary to control the compressed portion, and in particular, by preventing the packing from loosening between the inner circumferential portion of the cover plate through-hole and the outer circumferential surface of the rivet, the sealing performance is greatly improved.
（第２実施例
前記第１実施例に示された如く、蓋板９として単なる平
板のものを用い中空リベフトｌをかしめつけると、中空
リベット１の中空部近傍にかしめ圧力が集中する。この
ため蓋板９の上下に位置する上パッキング２及び下パッ
キング４にこの［（力が加わると、下パッキング・１が
中空リベット１の中空部から逃げようとする力が働く。(Second Embodiment As shown in the first embodiment, when a simple flat plate is used as the cover plate 9 and the hollow rivet l is caulked, the caulking pressure is concentrated near the hollow part of the hollow rivet 1. When this force is applied to the upper packing 2 and the lower packing 4 located above and below the lid plate 9, a force acts that causes the lower packing 1 to escape from the hollow part of the hollow rivet 1.
特に中空ノベット１の外側面部分と接していない下パッ
キング４は、かしめにより加圧状態となる部分から外周
方向・＼はみ出し易い。この状態を示すのが、第７図で
ある。このように、蓋板９の下面とワッシャー５との間
に、下パッキング４の逃げによる空間部１６が生じ、こ
れが密閉ｉ生を低下させる原因となる。In particular, the lower packing 4 that is not in contact with the outer surface portion of the hollow Novet 1 tends to protrude in the outer circumferential direction from the portion that is pressurized by caulking. FIG. 7 shows this state. In this way, a space 16 is created between the lower surface of the lid plate 9 and the washer 5 due to the escape of the lower packing 4, which causes a reduction in the sealing performance.
そこで、この第２実施例では、蓋板９の透孔部川辺に透
孔と同心円状に段差９ｂを設けると、かしめ時に下パッ
キング４が段差９Ｉ）のコーナ一部９ｃに食い込むこと
になり、密閉性が向上する（第８図参照）。Therefore, in this second embodiment, if a step 9b is provided on the side of the through-hole part of the cover plate 9 in a concentric circle with the through-hole, the lower packing 4 will bite into the corner part 9c of the step 9I) when caulking. The sealing performance is improved (see Figure 8).
この段差９ｂを設けた場合（第８図）と、段差を設けな
い場合（第７図）の構造における密閉性の差異を調べた
。この時の実験条件は、前記第１実施例における充電時
の電流を０．２５ＣｍＡとした以外は同様にして、テス
トを行った。The difference in airtightness between the structures with the step 9b (FIG. 8) and without the step (FIG. 7) was investigated. The test conditions at this time were the same as in the first embodiment except that the current during charging was set to 0.25 CmA.
この結果を、第２表に示す。The results are shown in Table 2.
第 ２ 表
池が、密閉性においてより優れたものであることが理解
できる。It can be seen that the second pond has better airtightness.
（ト）発明の効果
本発明の密閉型電池の製造方法によれば、パッキングに
付与されるかしめ圧力を第１工程及び第２工程によって
調整し、密閉性に優れた安全弁構造を提供することがで
きるので、その工業的価値は極めて大きい。(G) Effects of the Invention According to the method for manufacturing a sealed battery of the present invention, the caulking pressure applied to the packing can be adjusted in the first step and the second step, and a safety valve structure with excellent sealing performance can be provided. Therefore, its industrial value is extremely large.
第１図乃至第３図はいずれも本発明の封口構造の要部Ｆ
Ｍ７ｆＪ図であ）ノ、第１図は第１工程時における封口
構造の説明図、第２図は第２工程時における封１１構造
の説明図、第３図は本発明電池の要部断面図、第・１図
は従来の安全弁構造を示す要部断面図、第５図乃至第６
図はいずれも比較例の封口構造の要部断面図であり、第
５図は第１工程時における封口構造の説明図、第６図は
第２工程時における封口構造の説明図、第７図は蓋板に
段差を設けない場合のパッキングの状態を示す封口構造
の要部断面図、第８図は蓋板に段差を設けた場合のパッ
キングの状態をＴ；す封口構造の要部断面図である。
１・・・中空リベット、２・・・上パッキング、３・・
外装缶、４１・・・丁パッキング、５・・・ワッシャー
６．７・・・押え金型、８Ａ、８Ｂ、１８Ａ、１８Ｂ・
ポンチ、９・・・蓋板、１０・・・ゴム弁、１１・・・
端子蓋、１２・・・極板群、］３・・・正極タブ、１４
・・・リー賦
事−
ド板、
５・・・スペーサー
空間部。1 to 3 show the main part F of the sealing structure of the present invention.
FIG. 1 is an explanatory diagram of the sealing structure in the first step, FIG. 2 is an explanatory diagram of the seal 11 structure in the second step, and FIG. 3 is a sectional view of the main parts of the battery of the present invention. , Figure 1 is a sectional view of the main part showing the conventional safety valve structure, and Figures 5 to 6 are
The figures are all sectional views of essential parts of the sealing structure of the comparative example, and FIG. 5 is an explanatory diagram of the sealing structure in the first step, FIG. 6 is an explanatory diagram of the sealing structure in the second step, and FIG. 8 is a cross-sectional view of the main part of the sealing structure showing the state of packing when there is no step on the lid plate, and FIG. It is. 1...Hollow rivet, 2...Top packing, 3...
Exterior can, 41... packing, 5... washer 6.7... presser mold, 8A, 8B, 18A, 18B.
Punch, 9... Lid plate, 10... Rubber valve, 11...
Terminal cover, 12... Electrode plate group, ] 3... Positive electrode tab, 14
・・・Lee supply plate, 5...Spacer space part.
Claims (1)
る中空リベットと、前記透孔部に配置され前記中空リベ
ットを前記蓋板から絶縁する絶縁パッキングと、前記中
空リベットの下端部に配置され且つ前記パッキングを介
して前記蓋板に前記中空リベットをかしめ固定するワッ
シャーとからなる密閉構造を有する密閉式電池の製造方
法であって、 前記中空リベットの内径より大きい外径を有する先細の
ポンチを、前記中空リベットに挿入して、該中空リベッ
トの外側面に存在せるパッキングを前記中空リベットの
外側面と前記蓋板の透孔部内周部とで圧縮する第１工程
と、 前記中空リベットのつば部と前記蓋板、及び前記蓋板と
前記中空リベットの下端部に配置された前記ワッシャー
とで、前記パッキングを圧縮する第２工程とからなるこ
とを特徴とする密閉式電池の製造方法。 ２ 前記第１工程において、前記中空リベットの拡開部
分が、前記蓋板の透孔部よりも前記中空リベットの下端
部側に存在することを特徴とする請求項１記載の密閉式
電池の製造方法。[Scope of Claims] 1. A lid plate having a through hole, a hollow rivet forming a unipolar terminal of the battery, an insulating packing disposed in the through hole and insulating the hollow rivet from the lid plate, and the A method for manufacturing a sealed battery having a sealed structure including a washer disposed at a lower end of a hollow rivet and caulking and fixing the hollow rivet to the lid plate via the packing, the method comprising: a washer that is larger than the inner diameter of the hollow rivet; A first step of inserting a tapered punch having an outer diameter into the hollow rivet to compress the packing present on the outer surface of the hollow rivet between the outer surface of the hollow rivet and the inner periphery of the through hole of the cover plate. and a second step of compressing the packing using the collar of the hollow rivet and the cover plate, and the cover plate and the washer disposed at the lower end of the hollow rivet. Method of manufacturing sealed batteries. 2. Manufacturing the sealed battery according to claim 1, wherein in the first step, the expanded portion of the hollow rivet is located closer to the lower end of the hollow rivet than the through hole of the lid plate. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1340820A JP2755751B2 (en) | 1989-12-28 | 1989-12-28 | Manufacturing method of sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1340820A JP2755751B2 (en) | 1989-12-28 | 1989-12-28 | Manufacturing method of sealed battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03203157A true JPH03203157A (en) | 1991-09-04 |
| JP2755751B2 JP2755751B2 (en) | 1998-05-25 |
Family
ID=18340598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1340820A Expired - Fee Related JP2755751B2 (en) | 1989-12-28 | 1989-12-28 | Manufacturing method of sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2755751B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04322053A (en) * | 1991-04-19 | 1992-11-12 | Matsushita Electric Ind Co Ltd | Small enclosed cell |
| JPH07335190A (en) * | 1994-06-03 | 1995-12-22 | Furukawa Battery Co Ltd:The | Sealed alkaline storage battery and its manufacture |
| JP2004014173A (en) * | 2002-06-04 | 2004-01-15 | Japan Storage Battery Co Ltd | Battery and manufacturing method for battery |
| JP2015022987A (en) * | 2013-07-23 | 2015-02-02 | 株式会社豊田自動織機 | Power storage device, and method of manufacturing the same |
| WO2015125487A1 (en) * | 2014-02-21 | 2015-08-27 | 株式会社リチウムエナジージャパン | Electricity storage element and electricity storage element production method |
| JPWO2014002819A1 (en) * | 2012-06-29 | 2016-05-30 | トヨタ自動車株式会社 | battery |
| EP4199206A4 (en) * | 2021-02-19 | 2024-09-04 | Lg Energy Solution Ltd | Riveting structure of electrode terminal, and secondary battery, battery pack, and automobile comprising same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6154881A (en) * | 1984-08-23 | 1986-03-19 | Denki Onkyo Co Ltd | High voltage generator |
| JPS6299634A (en) * | 1985-10-24 | 1987-05-09 | Isuzu Motors Ltd | Turbo-compound internal-combustion engine |
| JPS63259962A (en) * | 1987-04-16 | 1988-10-27 | Sanyo Electric Co Ltd | Manufacture of enclosed type cell with safety valve |
-
1989
- 1989-12-28 JP JP1340820A patent/JP2755751B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6154881A (en) * | 1984-08-23 | 1986-03-19 | Denki Onkyo Co Ltd | High voltage generator |
| JPS6299634A (en) * | 1985-10-24 | 1987-05-09 | Isuzu Motors Ltd | Turbo-compound internal-combustion engine |
| JPS63259962A (en) * | 1987-04-16 | 1988-10-27 | Sanyo Electric Co Ltd | Manufacture of enclosed type cell with safety valve |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04322053A (en) * | 1991-04-19 | 1992-11-12 | Matsushita Electric Ind Co Ltd | Small enclosed cell |
| JPH07335190A (en) * | 1994-06-03 | 1995-12-22 | Furukawa Battery Co Ltd:The | Sealed alkaline storage battery and its manufacture |
| JP2004014173A (en) * | 2002-06-04 | 2004-01-15 | Japan Storage Battery Co Ltd | Battery and manufacturing method for battery |
| JPWO2014002819A1 (en) * | 2012-06-29 | 2016-05-30 | トヨタ自動車株式会社 | battery |
| JP2015022987A (en) * | 2013-07-23 | 2015-02-02 | 株式会社豊田自動織機 | Power storage device, and method of manufacturing the same |
| WO2015125487A1 (en) * | 2014-02-21 | 2015-08-27 | 株式会社リチウムエナジージャパン | Electricity storage element and electricity storage element production method |
| US20170012251A1 (en) * | 2014-02-21 | 2017-01-12 | Gs Yuasa International Ltd. | Energy storage device and method of manufacturing energy storage device |
| JPWO2015125487A1 (en) * | 2014-02-21 | 2017-03-30 | 株式会社Ｇｓユアサ | Power storage device and method for manufacturing power storage device |
| US10790485B2 (en) * | 2014-02-21 | 2020-09-29 | Gs Yuasa International Ltd. | Energy storage device and method of manufacturing energy storage device |
| EP4199206A4 (en) * | 2021-02-19 | 2024-09-04 | Lg Energy Solution Ltd | Riveting structure of electrode terminal, and secondary battery, battery pack, and automobile comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2755751B2 (en) | 1998-05-25 |
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