JPS6224904B2 - - Google Patents
Info
- Publication number
- JPS6224904B2 JPS6224904B2 JP55011061A JP1106180A JPS6224904B2 JP S6224904 B2 JPS6224904 B2 JP S6224904B2 JP 55011061 A JP55011061 A JP 55011061A JP 1106180 A JP1106180 A JP 1106180A JP S6224904 B2 JPS6224904 B2 JP S6224904B2
- Authority
- JP
- Japan
- Prior art keywords
- gasket
- polyethylene
- current collector
- center
- press
- 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
Links
- 239000004698 Polyethylene Substances 0.000 claims description 22
- -1 polyethylene Polymers 0.000 claims description 22
- 229920000573 polyethylene Polymers 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 5
- 229910052748 manganese Inorganic materials 0.000 description 5
- 239000011572 manganese Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
-
- 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
-
- 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
本発明は円筒形電池のケース開口部を封口する
中央部に集電子を圧入した組立ガスケツトの製造
法に関するものである。
円筒形電池、例えば円筒形アルカリマンガン電
池の樹脂製絶縁ガスケツトは、電池ケースの封口
に当つて耐漏液性にすぐれていると共に、集電子
を固定する固定部材としての機能をもつているこ
とが要求される。
本発明はガスケツトを樹脂、とくにポリエチレ
ンで成形する際に、ポリエチレンの注入口を成形
金型のガスケツト中央部に相当する位置に設け、
ここから溶融ポリエチレンをガスケツト成形金型
内に放射状に注入して溶融ポリエチレンが相互に
ぶつかり合うことで発生する線状模様のいわゆる
“ウエルドライン”のないガスケツトを成型する
ことを主たる目的とする。このようにポリエチレ
ン製ガスケツトにウエルドラインをなくすことに
よつて、局部的な弱さを生じないようにしガスケ
ツト中央孔に集電子を圧入する際のクラツク発生
を防止し、ガスケツトの孔径に比較してその1.3
〜1.4倍と大きい外径をもつ集電子を固定可能と
し、ガスケツトと集電子との間に微小間隙がな
く、耐漏液性に優れた集電構造をもつアルカリマ
ンガン電池を提供することが可能にできる。
従来、第３図ハに示す如きキヤツプ形ガスケツ
ト１を成型する際に、同図イ及びロで示す上下２
ａと下型２ｂとからなる成形金型２のａの位置に
樹脂注入口ｇを設け、かつ中央に孔形成用ポンチ
コアPCと、筒部規制用スリーブＳを配し、樹脂
注入口ｇから溶融状態のポリエチレンＰを金型の
キヤビテイＣ内に充填注入し冷却後型開きしてガ
スケツト１を成形していた。この成形方法では、
ポリエチレン注入口ｇがキヤビテイＣの中心をは
ずれた１か所であり、またこの注入口がガスケツ
トの中央部から離れていたために、ガスケツト成
形時に注入した溶融状態のポリエチレンが、金型
２内を流れていく間に金型内部の残留空気を抱き
込むとともに、第３図イのｂで示した位置にウエ
ルドラインが生じた。そのため、第４図に示した
釘状集電子３をガスケツト１の中央孔に圧入し、
組立ガスケツトを構成する際に強度的に弱いウエ
ルドラインからクラツクが発生した。従つて、ク
ラツクを生じることなく集電子を圧入する際のガ
スケツトの中央孔４の孔径に対する集電子３のピ
ン外径は、1.1〜1.2倍程度が限度であつた。この
場合中央孔４と集電体３との間に微小間隙が生
じ、ここからアルカリ電解液が外部へ漏れ出ると
いう問題があつた。
本発明は、このようにガスケツトをポリエチレ
ンで成形する際にウエルドラインの発生を解消
し、ガスケツト中央孔に集電子を圧入してもクラ
ツクが生じないようにして耐漏液性に優れた組立
ガスケツトを提供できる組立ガスケツトの製造法
を提供するものである。
以下、本発明の実施例を図面によつて説明す
る。第１図ハに示すキヤツプ形ガスケツト１をポ
リエチレンで成形する際、第１図イ及びロで示す
成形金型２のキヤビテイＣのガスケツト中央部に
相当するａの位置にポリエチレン注入口ｇを設
け、ここから溶融状態のポリエチレンＰを金型２
のキヤビテイＣ内に流し込む。キヤビテイＣ内に
流し込まれた溶融状態のポリエチレンＰは、キラ
ビテイＣ内を、その中央部から放射状に中央から
外側方向へ流れてゆくためキヤビテイ内の残留空
気を抱き込むことはなく、従つてウエルドライン
が発生しないポリエチレン製ガスケツトを形成で
きる。
なお、ガスケツト１の中央孔４の底部には、ポ
リエチレン注入口ｇとキヤビテイＣをつなぐ円盤
状流路を設けたことによつて、厚さ0.3〜0.5mm程
度のポリエチレン層５が中央孔４の盲蓋として孔
の端部に一体に形成されるが、第４図に示した集
電子３が通常は真ちゆうあるいは鉄にスズメツキ
したものであることから、これをガスケツトの中
央孔４に圧入することによつて、薄いポリエチレ
ン層５は容易に突き破ることができる。
このようにウエルドラインのないキヤツプ形ガ
スケツトを用いることによつて、集電子をガスケ
ツトに圧入する際にこれまで生じていたクラツク
はなくなり、その分だけ第４図に示した集電子の
ピン外径をガスケツトの中央孔径に対して1.3〜
1.4倍と、これまでよりも太くすることが可能と
なる。このことにより、ガスケツトと集電子との
間の微小間隙はなくなり、第２図に示す気密性、
耐漏液性にすぐれた構造の組立ガスケツトを構成
することができる。なお、第２図中６は集電子３
に溶接した負極端子板である。
第５図は、第２図に示した組立ガスケツトを用
いて形成した円筒形アルカリマンガン電池であつ
て、図中、７は負極亜鉛、８は二酸化マンガン正
極、９はセパレータ、１０は円筒形電池ケース、
１１は正極端子である。
このように本発明の方法によれば、ガスケツト
中央孔に集電子を圧入する際にこれまで問題とな
つていたクラツクの発生が防止され、集電子のピ
ン外径を従来よりも太くすることが可能となつ
て、集電子とガスケツト中央孔との間の微小間隙
をなくすことができた。従つて気密性、液密性に
すぐれた組立ガスケツトを構成することが可能と
なり、耐漏液性にすぐれたアルカリマンガン電池
が製造できるようになつた。
次表は従来法と本発明の方法とにおいて、ガス
ケツト中央孔径に対する集電子のピン外径を変化
させた際の集電子圧入時のガスケツトにおけるク
ラツク発生個数ならびに耐漏液性の比較を示す。
なお耐漏液性の試験条件は、60℃と−10℃に各
４時間放置することを１サイクルとした温度サイ
クル条件下で３カ月保存した。
The present invention relates to a method of manufacturing an assembled gasket in which a current collector is press-fitted into the center portion for sealing the opening of a case of a cylindrical battery. The resin insulating gasket of a cylindrical battery, such as a cylindrical alkaline manganese battery, is required to have excellent leakage resistance when sealing the battery case, and to also function as a fixing member for fixing the current collector. be done. When molding a gasket with resin, particularly polyethylene, the present invention provides a polyethylene injection port at a position corresponding to the center of the gasket in the mold,
The main purpose of this method is to inject molten polyethylene radially into a gasket mold to mold a gasket without so-called "weld lines," which are linear patterns that occur when the molten polyethylene collides with each other. By eliminating the weld line in the polyethylene gasket in this way, it prevents local weaknesses from occurring and prevents cracks from occurring when the current collector is press-fitted into the gasket's center hole. Part 1.3
It is possible to fix a current collector with an outer diameter ~1.4 times larger, and it is now possible to provide an alkaline manganese battery with a current collector structure that has excellent leakage resistance and no minute gaps between the gasket and the current collector. can. Conventionally, when molding a cap-shaped gasket 1 as shown in FIG. 3C, the upper and lower parts 2 shown in FIG.
A resin injection port g is provided at the position a of the molding die 2 consisting of a mold 2 and a lower mold 2b, and a punch core PC for hole formation and a sleeve S for regulating the cylindrical portion are arranged in the center, and the resin injection port g is used to melt the resin. The gasket 1 was formed by filling and injecting the polyethylene P into the cavity C of the mold, and after cooling, the mold was opened. In this molding method,
Since the polyethylene injection port g was located at a location off the center of the cavity C, and this injection port was away from the center of the gasket, the molten polyethylene injected during gasket molding flowed inside the mold 2. Over time, residual air inside the mold was trapped, and a weld line was formed at the position indicated by b in FIG. 3A. Therefore, the nail-shaped current collector 3 shown in FIG. 4 is press-fitted into the center hole of the gasket 1.
When assembling the gasket, a crack occurred due to a weak weld line. Therefore, the outer diameter of the pin of the current collector 3 is limited to about 1.1 to 1.2 times the diameter of the central hole 4 of the gasket when the current collector is press-fitted without causing a crack. In this case, a problem occurred in that a minute gap was created between the center hole 4 and the current collector 3, and the alkaline electrolyte leaked out from the gap. The present invention eliminates the occurrence of weld lines when molding gaskets from polyethylene, prevents cracks from occurring even when a current collector is press-fitted into the center hole of the gasket, and provides an assembled gasket with excellent leakage resistance. The present invention provides a method of manufacturing an assembled gasket that can be provided. Embodiments of the present invention will be described below with reference to the drawings. When molding the cap-shaped gasket 1 shown in FIG. 1C from polyethylene, a polyethylene injection port g is provided at a position a corresponding to the center of the gasket of the cavity C of the molding die 2 shown in FIGS. From here, the molten polyethylene P is poured into mold 2.
Pour into cavity C. The molten polyethylene P poured into the cavity C flows radially outward from the center of the cavity C, so that it does not entrap residual air in the cavity, and therefore the weld line It is possible to form a polyethylene gasket that does not generate. In addition, by providing a disc-shaped flow path connecting the polyethylene injection port g and the cavity C at the bottom of the central hole 4 of the gasket 1, a polyethylene layer 5 with a thickness of about 0.3 to 0.5 mm is formed in the central hole 4. It is integrally formed at the end of the hole as a blind cover, but since the current collector 3 shown in Fig. 4 is usually made of brass or tin plated iron, it is press-fitted into the central hole 4 of the gasket. By doing so, the thin polyethylene layer 5 can be easily penetrated. By using a cap-type gasket without weld lines in this way, the cracks that previously occurred when press-fitting the collector into the gasket are eliminated, and the outer diameter of the pin of the collector shown in Figure 4 can be reduced accordingly. 1.3 to the central pore diameter of the gasket
1.4 times, making it possible to make it thicker than before. As a result, there is no minute gap between the gasket and the current collector, resulting in airtightness as shown in Figure 2.
It is possible to construct an assembled gasket having a structure with excellent leakage resistance. In addition, 6 in Fig. 2 is the current collector 3.
This is the negative terminal plate welded to. FIG. 5 shows a cylindrical alkaline manganese battery formed using the assembled gasket shown in FIG. 2, in which 7 is a zinc negative electrode, 8 is a manganese dioxide positive electrode, 9 is a separator, and 10 is a cylindrical battery. Case,
11 is a positive terminal. As described above, according to the method of the present invention, it is possible to prevent the occurrence of cracks that have been a problem in the past when press-fitting a current collector into the center hole of a gasket, and it is possible to make the outer diameter of the current collector pin larger than before. This made it possible to eliminate the minute gap between the current collector and the central hole of the gasket. Therefore, it has become possible to construct an assembled gasket with excellent airtightness and liquidtightness, and it has become possible to manufacture an alkaline manganese battery with excellent leakage resistance. The following table shows a comparison between the conventional method and the method of the present invention in terms of the number of cracks that occur in the gasket when the collector is press-fitted and the leakage resistance when the outer diameter of the collector pin relative to the central hole diameter of the gasket is changed. The test conditions for leakage resistance were as follows: The sample was stored for 3 months under a temperature cycle condition in which one cycle consisted of leaving it at 60°C and -10°C for 4 hours each.
【表】
上記表に示す通り、従来法に比べ、本発明法に
よれば、ガスケツト中央孔径に対する集電子のピ
ン外径の比を1.3倍〜1.4倍にしても集電子圧入時
に、ガスケツトにクラツクを生じることがなく、
耐漏液特性も向上したものを得ることができる。
しかし集電子のピン外径がガスケツトの中央孔
径の1.2倍では集電子に対するガスケツトの緊縛
力が弱く、この部分から電解液が漏出して耐漏液
性は悪化する。逆にピン外径をガスケツトの中央
孔径の1.5倍まで比率を高めると、本発明法にお
いてもクラツクが生じ、耐漏液特性が低下する加
えて集電子のガスケツトへの圧入時の抵抗が増大
し、組立ガスケツトの組立作業性が低下する。
以上、電池の耐漏液性、集電子圧入時のガスケ
ツトのクラツク発生から考え、ガスケツトの中央
孔径に対する集電子のピン外径の比は1.3倍〜1.4
倍が最も良好な範囲と判断される。[Table] As shown in the table above, compared to the conventional method, according to the method of the present invention, even if the ratio of the outer diameter of the pin of the collector to the central hole diameter of the gasket is increased to 1.3 to 1.4 times, there is no crack in the gasket when press-fitting the collector. without causing
It is also possible to obtain a product with improved leakage resistance. However, if the outer diameter of the collector pin is 1.2 times the central hole diameter of the gasket, the binding force of the gasket to the collector is weak, and the electrolyte leaks from this portion, resulting in poor leakage resistance. Conversely, if the ratio of the pin outer diameter is increased to 1.5 times the central hole diameter of the gasket, cracks will occur even in the method of the present invention, the leakage resistance will decrease, and the resistance when press-fitting the collector into the gasket will increase. The ease of assembling the gasket is reduced. Considering the above, considering the leakage resistance of the battery and the occurrence of cracks in the gasket when the collector is press-fitted, the ratio of the outer diameter of the collector pin to the central hole diameter of the gasket is 1.3 to 1.4.
twice is judged to be the best range.
第１図イは本発明の実施例におけるキヤツプ形
ガスケツトの成形金型の説明図、同ロは成形金型
の断面略図、同ハは成形されたガスケツトの半断
面図、第２図は組立ガスケツトの半断面図、第３
図イは従来のガスケツト成形金型の説明図、同ロ
は成形金型の断面略図、同ハは成形されたガスケ
ツトの半断面図、第４図は釘状集電子の側面図、
第５図は本発明による組立ガスケツトを用いて封
口した円筒形アルカリマンガン電池の半断面図で
ある。
１……キヤツプ形ガスケツト、２……ガスケツ
ト成形金型、ａ……ポリエチレン注入口ｇの形成
位置、３……集電子、４……集電子を圧入させる
ガスケツト中央孔。
Figure 1A is an explanatory diagram of a mold for forming a cap-shaped gasket according to an embodiment of the present invention, Figure 1B is a schematic cross-sectional view of the mold, Figure 1C is a half-sectional view of the molded gasket, and Figure 2 is an assembled gasket. Half-sectional view of, 3rd
Figure A is an explanatory diagram of a conventional gasket mold, Figure B is a schematic cross-sectional view of the mold, Figure C is a half-sectional view of a molded gasket, and Figure 4 is a side view of a nail-shaped current collector.
FIG. 5 is a half-sectional view of a cylindrical alkaline manganese battery sealed using an assembled gasket according to the present invention. DESCRIPTION OF SYMBOLS 1... Cap-shaped gasket, 2... Gasket mold, a... Formation position of polyethylene injection port g, 3... Current collector, 4... Gasket center hole into which the current collector is press-fitted.
Claims (1)
プ形ガスケツトをポリエチレンにて成形する際、
成形金型の前記ガスケツト中央部に相当する位置
にポリエチレン注入口を設けて、この注入口より
放射状に溶融ポリエチレンを流し込み、得られた
ガスケツトの中央部にポリエチレン層からなる盲
蓋を有した中央孔を形成し、この中央孔にこの孔
径の1.3〜1.4倍の外径をもつ集電子を圧入するこ
とを特徴とした円筒形電池用組立ガスケツトの製
造法。1. When molding a cap-shaped gasket that seals the opening of a cylindrical battery case using polyethylene,
A polyethylene injection port is provided at a position corresponding to the center of the gasket in the molding die, and molten polyethylene is poured radially through the injection port, and a central hole having a blind lid made of a polyethylene layer is formed in the center of the resulting gasket. 1. A method for manufacturing an assembly gasket for a cylindrical battery, characterized in that a current collector having an outer diameter of 1.3 to 1.4 times the diameter of the hole is press-fitted into the center hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1106180A JPS56109452A (en) | 1980-01-31 | 1980-01-31 | Preparation of cap-shaped gasket for cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1106180A JPS56109452A (en) | 1980-01-31 | 1980-01-31 | Preparation of cap-shaped gasket for cylindrical battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56109452A JPS56109452A (en) | 1981-08-29 |
| JPS6224904B2 true JPS6224904B2 (en) | 1987-05-30 |
Family
ID=11767484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1106180A Granted JPS56109452A (en) | 1980-01-31 | 1980-01-31 | Preparation of cap-shaped gasket for cylindrical battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56109452A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016217117A1 (en) | 2016-09-08 | 2016-12-01 | Zf Friedrichshafen Ag | Frequency-selective damping valve arrangement |
| JP2019212542A (en) * | 2018-06-07 | 2019-12-12 | タイガースポリマー株式会社 | Manufacturing method of dry cell and gasket for dry cell |
-
1980
- 1980-01-31 JP JP1106180A patent/JPS56109452A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56109452A (en) | 1981-08-29 |
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