JPH0512818B2 - - Google Patents
Info
- Publication number
- JPH0512818B2 JPH0512818B2 JP58165525A JP16552583A JPH0512818B2 JP H0512818 B2 JPH0512818 B2 JP H0512818B2 JP 58165525 A JP58165525 A JP 58165525A JP 16552583 A JP16552583 A JP 16552583A JP H0512818 B2 JPH0512818 B2 JP H0512818B2
- Authority
- JP
- Japan
- Prior art keywords
- gasket
- battery
- sealing plate
- moisture content
- nylon
- 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.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- VBXPBXKTTNBNOD-UHFFFAOYSA-N thiirene 1-oxide Chemical compound C1=CS1=O VBXPBXKTTNBNOD-UHFFFAOYSA-N 0.000 claims 1
- 239000004677 Nylon Substances 0.000 description 9
- 229920001778 nylon Polymers 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 229920002292 Nylon 6 Polymers 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 2
- 229920000299 Nylon 12 Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 229920000571 Nylon 11 Polymers 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 239000003349 gelling agent Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001105 regulatory effect 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
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/193—Organic material
-
- 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
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- 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
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/198—Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Description
産業上の利用分野
本発明は、アルカリ電池の製造法に関するもの
で、特にガスケツトとしてナイロン6.6を用いる
アルカリ電池の封口方法の改良に関する。
従来例の構成とその問題点
アルカリ電池の重要な課題の１つは、如何にし
て耐漏液性を向上するかである。従来、この課題
に対して、各種の構成材や封口方法が提案されて
いるが、現在最も代表的なものは、ナイロン製ガ
スケツトと封口板とを両者間に液状パツキングを
介在させて組合わせ、これを電池ケースに組入れ
て封口する方法である。
最近、この種のナイロン製ガスケツトを用いた
電池の対漏液性は、封口前のガスケツトの含水率
によつて大きく影響され、ガスケツトを含水率を
0.3％以下に調湿すると、著しく耐漏液性が向上
するとの提案がある（特開昭54−162134号公報）。
そこで、本発明者らは、各種のナイロンからな
るガスケツトを用いて、その含水率と電池の耐漏
液性について検討した。その結果、封口前に含水
率を0.3％以下に加熱乾燥処理をしたガスケツト
を使用して液密効果をあげることができるのはナ
イロン11、ナイロン12等であり、ナイロン６・
６、ナイロン６においては、含水率の低下により
耐衝撃性が極端に低下するため、電池封口時に最
もしめつけ圧力が集中する個所で破断現象が起こ
り、密封度が低下することがわかつた。
発明の目的
本発明は、ナイロン６・６からなるガスケツト
を用いる場合の上記のような不都合をなくし、ナ
イロン６・６の機械的特性を最大限に発揮させ
て、長期の耐漏液性にすぐれたアルカリ電池を得
る方法を提供することを目的とする。
発明の構成
本発明は、液状パツキングを介在させて組合わ
せたナイロン６・６製ガスケツトと封口板との組
立体を加熱乾燥処理を施し、ガスケツトの含水率
0.5〜2.0％のもとで電池ケースと組合わせて密封
口することを特徴とするものである。
実施例の説明
図面は本発明の方法によつて製造した電池を示
す。１は正極端子を兼ねる電池ケース、２は正極
リング３とともにケース１内に圧縮成形された二
酸化マンガンを活物質とする正極合剤であり、合
剤３上にはセパレータ４と含液材５とが組入れら
れている。
６は負極端子を兼ねた封口板で、その周縁には
外側へ折返した折返部６ａを有する。７はナイロ
ン６・６の成形品からなるガスケツト、８はガス
ケツト７と封口板６との間に介在させた液状パツ
キング、９は亜鉛粉末とゲル化剤及びアルカリ電
解液からなるゲル状の負極である。
次にこの電池の組立て方法を説明する。ガスケ
ツト７は断面Ｌ字状であり、その水平部には封口
板６の周縁下端を嵌合する凹部を有している。ま
ず、ガスケツト７の前記凹部または封口板６の周
縁下部に液状のパツキング、例えばブロンアスフ
アルトをトルエンに溶解して常温で粘性を有する
ようにしたものを塗布した後、ガスケツトと封口
板を組合わせ、乾燥炉に投入してガスケツトの含
水率を1.5％程度以下にする。
次いで、上記の組立体を乾燥炉より取り出し
て、ゲル状負極９を充填する。
一方、電池ケース１に合剤２、セパレータ４及
び含液材５を組入れ所定量の電解液を注入する。
次に、上記の正極側組立体と負極側組立体を合
わせ、ケース１の開口部をガスケツト７の周縁部
に折曲して密封電池を完成する。
本発明者らは、以上のようにして密閉電池を製
造する方法において、ガスケツトの含水率と耐漏
液性の相関を試験した結果、正、負極組立体を組
合わせる際のガスケツトの含水率を0.5〜2.0％に
規制することにより、ナイロン６・６製ガスケツ
トの耐衝撃性を低下させることなく、耐漏液性に
すぐれた電池の得られることを見出した。
電池の封口工程は大気雰囲気下で行われ、一方
上記のように乾燥炉から取り出したガスケツトは
封口工程に至る前に大気雰囲気下に放置されるの
が普通である。そして乾燥したガスケツトを40％
RHの雰囲気下に８時間程度放置すると、含水率
は約0.5％上がる。従つて上記のような製造工程
を採る場合、乾燥炉ではガスケツトの含水率を
1.5％以下にする必要がある。
ここで、特に注意しなくてはならない管理ポイ
ントは、封口工程に導入するときのナイロン６・
６製ガスケツトの含水率を0.5％未満に決してし
ないことと、含水率2.0％を超えさせないことが
大切である。含水率が0.5％未満であると、ガス
ケツトの耐衝撃性が著しく低下し、正極ケースと
封口板とのしめつけ圧力でガスケツトが破断しや
すくなる。また、2.0％を超えると、伸び性が向
上することにより強度が低下することとなり、高
い液密性を得ることが不可能となる。
なお、ガスケツトの含水率を調整するのに、ガ
スケツトを単独で乾燥処理すると、その物性や特
に寸法が変化し、封口による密封部分の整合性が
悪くなるので、封口板の外周縁下端部とこれに対
応するガスケツトの少なくとも一方に液状ガスケ
ツトを塗布した後、封口板とガスケツトを組合せ
たものを乾燥処理する必要がある。
次に、上記のようにして、封口前におけるガス
ケツトの含水率を以下のように各種変えて
LR1130の電池各100個を組立て、45℃、90％RH
の雰囲気で保存したときの漏液を生じた電池数
（累計）の比較を次表に示す。
電池Ａ；10mmHgの真空度を与えながら60℃で25
時間減圧乾燥し、含水率を0.25％に封口、
電池Ｂ；45℃、20％RHでの乾燥を16時間〜72時
間加えて、含水率を1.0％にして封口、
電池Ｃ；45℃、30％RHの乾燥を16時間〜72時間
加えて、含水率を1.8％にして封口、
電池Ｄ；45℃、40％RHの乾燥を16時間〜72時間
加えて、含水率を2.5％にして封口、
電池Ｅ；含水率４％程度にして封口、
電池Ｆ；含水率６％程度にして封口、
INDUSTRIAL APPLICATION FIELD The present invention relates to a method for manufacturing an alkaline battery, and in particular to an improvement in a method for sealing an alkaline battery using nylon 6.6 as a gasket. Conventional Structure and Problems One of the important issues for alkaline batteries is how to improve leakage resistance. In the past, various constituent materials and sealing methods have been proposed to address this problem, but the most typical one at present is a combination of a nylon gasket and a sealing plate with liquid packing interposed between the two. This is a method of assembling this into a battery case and sealing it. Recently, the leakage resistance of batteries using this type of nylon gasket has been greatly influenced by the moisture content of the gasket before sealing.
It has been proposed that leakage resistance can be significantly improved by adjusting the humidity to 0.3% or less (Japanese Patent Application Laid-open No. 162134/1983). Therefore, the present inventors used gaskets made of various types of nylon to study their water content and leakage resistance of batteries. As a result, nylon 11, nylon 12, etc. can be used to achieve a liquid-tight effect by using a gasket that has been heat-dried to a moisture content of 0.3% or less before sealing, while nylon 6, nylon 12, etc.
6. It was found that in nylon 6, the impact resistance is extremely reduced due to a decrease in water content, and therefore a rupture phenomenon occurs at the location where the tightening pressure is most concentrated during battery sealing, resulting in a decrease in the degree of sealing. Purpose of the Invention The present invention eliminates the above-mentioned disadvantages when using a gasket made of nylon 6.6, maximizes the mechanical properties of nylon 6.6, and provides excellent long-term leakage resistance. The purpose is to provide a method for obtaining alkaline batteries. Structure of the Invention The present invention heats and dries an assembly of a nylon 6.6 gasket and a sealing plate, which are combined with a liquid packing interposed therebetween, to reduce the moisture content of the gasket.
It is characterized by being sealed in combination with the battery case at a concentration of 0.5 to 2.0%. DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show a battery manufactured by the method of the invention. 1 is a battery case that also serves as a positive electrode terminal; 2 is a positive electrode mixture containing manganese dioxide as an active material, which is compression-molded in the case 1 together with a positive electrode ring 3; on the mixture 3 is a separator 4 and a liquid-containing material 5; is incorporated. Reference numeral 6 denotes a sealing plate which also serves as a negative electrode terminal, and has a folded portion 6a folded outward at its periphery. 7 is a gasket made of a molded product of nylon 6.6, 8 is a liquid packing interposed between the gasket 7 and the sealing plate 6, and 9 is a gel-like negative electrode made of zinc powder, a gelling agent, and an alkaline electrolyte. be. Next, a method for assembling this battery will be explained. The gasket 7 has an L-shaped cross section, and has a recessed portion in its horizontal portion into which the lower end of the peripheral edge of the sealing plate 6 is fitted. First, a liquid packing such as blown asphalt dissolved in toluene to make it viscous at room temperature is applied to the concave portion of the gasket 7 or the lower peripheral edge of the sealing plate 6, and then the gasket and the sealing plate are combined. Put it into a drying oven to reduce the moisture content of the gasket to about 1.5% or less. Next, the above assembly is taken out of the drying oven and filled with gelled negative electrode 9. On the other hand, the mixture 2, separator 4, and liquid-containing material 5 are assembled into the battery case 1, and a predetermined amount of electrolyte is injected therein. Next, the above-mentioned positive electrode side assembly and negative electrode side assembly are combined, and the opening of the case 1 is bent to the peripheral edge of the gasket 7 to complete a sealed battery. In the method for manufacturing a sealed battery as described above, the present inventors tested the correlation between the water content of the gasket and the leakage resistance, and found that the water content of the gasket when combining the positive and negative electrode assemblies was 0.5. It has been found that by regulating the content to ~2.0%, a battery with excellent leakage resistance can be obtained without reducing the impact resistance of the nylon 6.6 gasket. The battery sealing process is carried out in an atmospheric environment, while the gasket taken out of the drying oven as described above is usually left in the atmospheric atmosphere before the sealing process. and 40% dry gasket
If left in an RH atmosphere for about 8 hours, the moisture content will increase by about 0.5%. Therefore, when using the above manufacturing process, the moisture content of the gasket must be controlled in the drying oven.
Must be 1.5% or less. Here, the management point that must be especially noted is when introducing nylon 6 to the sealing process.
It is important to never allow the moisture content of the No. 6 gasket to fall below 0.5%, and never to allow the moisture content to exceed 2.0%. If the water content is less than 0.5%, the impact resistance of the gasket will be significantly reduced, and the gasket will easily break due to the tightening pressure between the positive electrode case and the sealing plate. Moreover, if it exceeds 2.0%, strength will decrease due to improved elongation, making it impossible to obtain high liquid tightness. Note that if the gasket is dried alone to adjust the moisture content of the gasket, its physical properties and especially its dimensions will change, and the integrity of the sealing area will deteriorate. After applying a liquid gasket to at least one of the corresponding gaskets, it is necessary to dry the sealing plate and gasket combination. Next, as described above, the moisture content of the gasket before sealing was varied as shown below.
Assemble 100 LR1130 batteries each, 45℃, 90%RH
The following table shows a comparison of the cumulative number of batteries that leaked when stored in the following atmosphere. Battery A: 25 at 60℃ while applying a vacuum of 10mmHg
Dry under reduced pressure for hours and seal to a moisture content of 0.25%.Battery B: Dry at 45℃ and 20%RH for 16 to 72 hours to reduce moisture content to 1.0% and seal.Battery C; 45℃, 30℃. %RH for 16 to 72 hours to bring the moisture content to 1.8% and seal it. Battery D: Dry at 45℃ and 40%RH for 16 to 72 hours to bring the moisture content to 2.5% and seal it. , Battery E: Sealed with a moisture content of about 4%, Battery F: Sealed with a moisture content of about 6%,
【表】
上記の結果から明らかなように、本発明による
電池Ｂ、Ｃはきわめて耐漏液性にすぐれている。
これに対して、含水率の高いガスケツトを用いた
電池Ｃ、Ｅ、Ｆは保存期間が長くなるにつれて漏
液数が増加し、しかもこの傾向は含水率が高いも
のほど著しい。一方、含水率の極端に低いガスケ
ツトを用いた電池Ａは、短期の保存で漏液するも
のがあるが、長期間保存してもそれ以上漏液数は
増加していない。これは含水率が低いため、ガス
ケツトの耐衝撃性が低下し、封口時の密封度が不
完全になつた電池が漏液を生じたものと思われ
る。実際漏液電池を調べると、ガスケツトの封口
板周縁下部と接する部分付近に微小なクラツクが
認められた。
発明の効果
以上のように、本発明によれば、ナイロン６・
６製ガスケツトを用いたアルカリ電池の耐漏液性
を向上し、信頼性を確保することができる。[Table] As is clear from the above results, batteries B and C according to the present invention have extremely excellent leakage resistance.
On the other hand, in batteries C, E, and F using gaskets with high moisture content, the number of leaks increases as the storage period increases, and this tendency is more pronounced as the moisture content increases. On the other hand, battery A using a gasket with an extremely low water content sometimes leaks during short-term storage, but the number of leaks does not increase even after long-term storage. This is thought to be due to the low water content, which lowered the impact resistance of the gasket, resulting in incomplete sealing during sealing, which caused the battery to leak. When the leaking battery was actually examined, a small crack was found near the part of the gasket where it contacted the lower peripheral edge of the sealing plate. Effects of the Invention As described above, according to the present invention, nylon 6.
It is possible to improve the leakage resistance of alkaline batteries using gaskets manufactured by No. 6 and ensure reliability.
図面は本発明の実施例のアルカリ電池の要部縦
断面図である。
１……電池ケース、６……封口板、７……ガス
ケツト、８……液状パツキング。
The drawing is a longitudinal sectional view of a main part of an alkaline battery according to an embodiment of the present invention. 1...Battery case, 6...Sealing plate, 7...Gasket, 8...Liquid packing.
Claims (1)
装着した封口板を電池ケース内に挿入し、電池ケ
ースの開口部を前記ガスケツトの外周縁部にしめ
つけて密封口するアルカリ電池の製造法であつ
て、前記封口板の外周縁下端部とこれに対応する
ガスケツトの少なくとも一方に液状パツキングを
塗布する工程、封口板とガスケツトを組合せる工
程、その後、封口板とガスケツトとの組立体を乾
燥する工程からなり、乾燥工程で、次工程である
電池ケースと組合せて密封口する時のガスケツト
の含水率が0.5〜2.0％となるよう調整してなるこ
とを特徴とするアルカリ電池の製造法。1. A method for manufacturing an alkaline battery, in which a sealing plate having a gasket made of Thiiron 6.6 attached to the peripheral edge thereof is inserted into a battery case, and the opening of the battery case is tightly sealed against the outer peripheral edge of the gasket, which method comprises: It consists of a step of applying liquid packing to at least one of the lower end of the outer peripheral edge of the sealing plate and a corresponding gasket, a step of assembling the sealing plate and the gasket, and a step of drying the assembly of the sealing plate and the gasket, A method for producing an alkaline battery, which comprises adjusting the moisture content of the gasket to 0.5 to 2.0% in the drying process when it is combined with a battery case in the next process and sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58165525A JPS6056360A (en) | 1983-09-08 | 1983-09-08 | Manufacturing method for alkaline battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58165525A JPS6056360A (en) | 1983-09-08 | 1983-09-08 | Manufacturing method for alkaline battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6056360A JPS6056360A (en) | 1985-04-01 |
| JPH0512818B2 true JPH0512818B2 (en) | 1993-02-19 |
Family
ID=15814044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58165525A Granted JPS6056360A (en) | 1983-09-08 | 1983-09-08 | Manufacturing method for alkaline battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6056360A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007123119A1 (en) * | 2006-04-19 | 2007-11-01 | Panasonic Corporation | Alkaline cell |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4850991B2 (en) * | 1999-10-22 | 2012-01-11 | 株式会社ＴａｎａーＸ | Folding plate reinforced display stand |
-
1983
- 1983-09-08 JP JP58165525A patent/JPS6056360A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007123119A1 (en) * | 2006-04-19 | 2007-11-01 | Panasonic Corporation | Alkaline cell |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6056360A (en) | 1985-04-01 |
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