JP4872162B2 - Control valve type lead-acid battery and manufacturing method thereof - Google Patents

Control valve type lead-acid battery and manufacturing method thereof Download PDF

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Publication number
JP4872162B2
JP4872162B2 JP2001105458A JP2001105458A JP4872162B2 JP 4872162 B2 JP4872162 B2 JP 4872162B2 JP 2001105458 A JP2001105458 A JP 2001105458A JP 2001105458 A JP2001105458 A JP 2001105458A JP 4872162 B2 JP4872162 B2 JP 4872162B2
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Japan
Prior art keywords
valve
type lead
battery
control valve
acid battery
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JP2002304976A (en
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孝 中嶋
栄治 大森
勲 井門
幸弘 小野田
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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    • 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

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Description

【０００１】
【発明の属する技術分野】
本発明は、安全弁部を改良した制御弁式鉛蓄電池に関するものである。
【０００２】
【従来の技術】
従来の制御弁式鉛蓄電池に使用される安全弁部は、例えば図４に示したように電槽（図示せず）を閉塞する蓋１に設けた排気孔２の周囲に形成した排気筒３にキャップ状ゴム弁４を装着した構成となっている。このようなキャップ状ゴム弁４は弁体蓋５を介して栓６により固定されている。また、栓６には電池外からのスパークからの引火を防止するための排気フィルタ７が設けられている。
【０００３】
さらに、弁体蓋５が排気フィルタ７と密着することによって、排気フィルタ７の通気性が損なわれることを抑制するために、弁体蓋５には突起５ａが設けられている。この突起５ａによって排気フィルタ７と弁体蓋５との間に間隔が確保されることにより、排気フィルタ７と弁体蓋５とが密着しないように構成されている。
【０００４】
ここで排気筒３は蓋１の材料であるＡＢＳ樹脂もしくはポリプロピレン樹脂で、キャップ状ゴム弁４はクロロプレンゴムやエチレン・プロピレンゴムで構成するとともに、キャップ状ゴム弁４と排気筒３との間にシリコンオイル等の耐酸性の液体シール剤が塗布されて安全弁が構成されている。
【０００５】
一般に、制御弁式鉛蓄電池における安全弁は、水の電気分解によるガス発生等による蓄電池内圧上昇時には開弁し、一旦ガスを放出すると閉弁し、酸素ガスが負極板に吸収されて減圧状態になった場合には、外気が蓄電池内に流入するのを防止するため閉弁していることが必要である。
【０００６】
ところが、前記したような従来の制御弁式鉛蓄電池においては高温で長期間使用する場合、キャップ状ゴム弁と弁筒の界面に貼り付きが発生し、開弁圧が異常に大きくなり、結果として電槽や蓋に規定以上の内圧が加わり、電槽や蓋およびこれらの接合部の内圧による応力が集中する部分で疲労破壊するという問題が生じている。
【０００７】
このキャップ状ゴム弁と弁筒とが貼り付くことにより開弁圧が異常上昇する原因は、キャップ状ゴム弁と弁筒の接触面に侵入した硫酸により、両者の界面が変質してしまうことと、キャップ状ゴム弁を構成するゴムの収縮力によりキャップ状ゴム弁を弁筒に保持させる構成のため、ゴムに含まれる可塑剤の移行を促進させ、両者の界面が変質してしまうことによる。
【０００８】
【発明が解決しようとする課題】
本発明はこのような制御弁式鉛蓄電池で発生する開弁圧の異常上昇とこれによる電槽の変形や破損という課題を解決するものであり、高温で長期間使用しても高信頼性を有する制御弁式鉛蓄電池を提供することを目的とするものである。
【０００９】
【課題を解決するための手段】
この課題を解決するために本発明の請求項１に記載の発明は、セルに対応して設けられた排気孔を閉塞するように安全弁付栓が蓋に装着された制御弁式鉛蓄電池において前記安全弁付栓には前記排気孔に対向する排出口が設けられ、前記排出口において前記排気孔の反対側に位置する開口部を平状のゴム板弁で閉塞するとともに、前記排気孔と前記排出口の開口部との間に間隔を設けたことを特徴とする制御弁式鉛蓄電池を示すものである。
【００１０】
本発明の請求項２に記載の発明は、請求項１に記載の構成を備えた制御弁式鉛蓄電池において、ゴム板弁は厚み方向に弾性変形する弁押えマットを介して弁体蓋で前記安全弁付栓に保持された構成を示すものである。
【００１１】
本発明の請求項３に記載の発明は、請求項１もしくは２に記載の構成を備えた制御弁式鉛蓄電池において、前記排出口と電池外部との間に排気フィルタを安全弁付栓に備えた構成を示すものである。
【００１２】
本発明の請求項４に記載の発明は、請求項１ないし３のいずれかに記載の構成を備えた制御弁式鉛蓄電池において、安全弁付栓の少なくとも前記ゴム板弁と接触する部分をポリプロピレン樹脂で構成したことを特徴とするものである。
【００１３】
本発明の請求項５に記載の発明は、請求項１ないし４のいずれかに記載の制御弁式鉛蓄電池は電槽化成終了後または初回充電終了後に安全弁付栓を取り付けることを特徴とする制御弁式鉛蓄電池の製造法を示すものである。
【００１４】
【発明の実施の形態】
以下、本発明の実施の形態について、図面を用いて説明する。
【００１５】
図１は本発明の実施の形態による制御弁式鉛蓄電池の要部断面を示す図である。図２は本発明の実施の形態による制御弁式鉛蓄電池の安全弁付栓１０の外観斜視図である。図３はこの安全弁付栓１０の構成部品を示す分解斜視図である。
【００１６】
図２に示す安全弁付栓１０は、図１および図３に示すように栓本体１１に平状のゴム板弁１２、スポンジ等の厚み方向に弾性変形可能な弁押えマット１３、弁体蓋１４および排気フィルタ１５を位置させ、栓本体１１と栓カバー１６とを熱溶着や超音波溶着により一体化させた構成を備えている。
【００１７】
図１に示すように本発明の制御弁式鉛蓄電池（以下単に電池と略称する）において、栓本体１１には排出口１７が電池を構成するセルに対向して設けられた排気孔１８に対応して設けられている。この排出口１７において排気孔１８と反対側に位置する開口面１７ａには、この排出口１７を閉塞するように平状のゴム板弁１２が載置されている。さらにその上に弁押えマット１３および弁体蓋１４が設けられている。そして栓カバー１６の中には排気フィルタ１５が設けてある。
【００１８】
栓本体１１の凹部１９は、スポンジ状の弁押えマット１３と平状のゴム板弁１２を収容する部分であり、弁体蓋１４により構成される収容高さ内に、スポンジ状の弁押えマット１３をある一定の厚みに圧縮させ平状のゴム板弁１２の表面全体を押し付けて配置してある。なお、この弁押えマット１３とゴム板弁１２とを一体に成型したものを用いることも可能である。
【００１９】
また弁押えマット１３は圧縮されることによりゴム板弁１２を排出口１７の開口面１７ａに押し付ける作用と、電池内圧が上昇した時にはさらに圧縮されてゴム板弁１２と排出口１７との間に排気経路を形成する作用が得られればよいので、前記したスポンジ材の他、圧縮力に応じて厚み方向に変形するとともに、圧縮力の低下に伴い、厚みが復元するような弾性変形する材質のものであればよい。
【００２０】
そして本発明においては排気孔１８と排出口１７の排気孔１８側の開口部１７ｂとの間に間隔２０を設けるものである。排気孔１８付近に硫酸の飛沫があってもこの間隔２０により排出口１７に硫酸が移動しにくく平状のゴム板弁１２と硫酸との接触を抑制することができる。したがって、平状のゴム板弁１２と排出口１７とが従来のように貼り付くことによる開弁圧の異常上昇とこれによる電槽変形を抑制することができる。
【００２１】
また、図４に示した従来のキャップ状ゴム弁４の内径は排気筒３の外径よりも小さくすることにより、キャップ状ゴム弁４自体が有する弾性によりキャップ状ゴム弁４の内壁が押し広げられることによって排気筒３の外壁と常に押し付けられている。
【００２２】
このような従来構成の安全弁ではキャップ状ゴム弁４から排気筒３への可塑剤の移行は顕著であったが、本発明の構成においてはこのような従来構成に比較して可塑剤の移行は少ない。これは平状のゴム板弁１２はスポンジ状の弁押えマット１３が保持する反発力のみにより平状のゴム板弁１２が圧縮されて排出口１７の開口面１７ａに押し付けられる構成に起因するものと推測される。このように従来例と本発明との構成の差異からくる平状のゴム板弁１２から開口面１７ａへの可塑剤の移行のしにくさと、前記した硫酸が排出口１７に飛散しない構成とあいまって、本発明の構成によれば従来構成の制御弁式鉛蓄電池において課題となっていた開弁圧の異常上昇と、これによって発生する電池内圧上昇および電槽変形といった現象の発生を抑制することができる。
【００２３】
また、本発明においては安全弁付栓１０を電池に装着するタイミングとしては電池の電槽化成もしくは初充電後に装着することが好ましい。電槽化成および初充電時には充電時のガス発生量も多く、硫酸の飛沫が発生しやすい状況にあるためである。この場合、電槽化成および初充電中において電池内への大気の流入を抑制するために排気筒１８ａに従来のキャップ状ゴム弁４を装着すればよい。
【００２４】
もちろん、本発明において特定する安全弁付栓１０を電池に装着した状態において電槽化成や初充電を行っても、本発明の効果を顕著に得ることができるが、前記したようなタイミングで安全弁付栓１０を電池に装着すればさらに効果を顕著に得ることができる。
【００２５】
さらに平状のゴム板弁１２が接する開口面１７ａをポリプロピレン樹脂で構成すれば、ゴム板弁１２と開口面１７ａとの貼り付きをさらに抑制することができる。
【００２６】
【実施例】
本発明の安全弁構造の制御弁式鉛蓄電池と従来の安全弁構造の制御弁式鉛蓄電池を用いて比較評価を行った。本発明の実施例として注液後に従来のエチレン・プロピレンゴムのキャップ状ゴム弁４を排気孔に装着し、電槽化成後にキャップ状ゴム弁４を取り外して安全弁付栓１０を装着した電池を電池Ａとし、および注液後に安全弁付栓１０を装着し、電槽化成を行った電池を電池Ｂとして作製した。なお、本発明例においては蓋２１をポリプロピレン樹脂、平状のゴム板弁１２としてエチレン・プロピレンゴムを用いた。
【００２７】
従来例の電池としては図４に示した構成において電池に注液後、エチレン・プロピレンゴムからなるキャップ状ゴム弁４をポリプロピレン樹脂からなる排気筒３に装着し、電槽化成後にキャップ状ゴム弁４を取り外して排気筒３に付着した硫酸分を拭き取った後に新たなキャップ状ゴム弁を排気筒３に装着した電池を電池Ｃとし、および電池に注液後キャップ状ゴム弁４を排気筒３に装着した後に電槽化成を行い、電池Ｃのように排気筒３に付着した硫酸分を拭き取らず、キャップ状ゴム弁４を交換しない電池を電池Ｄとして作製した。
【００２８】
これらの電池Ａ，Ｂ，Ｃ，Ｄについて電槽化成後の開弁圧（初期開弁圧）を測定した後、それぞれ６０℃中で１ヶ月放置，３ヶ月放置および６ヶ月放置後の開弁圧を測定した。これらの結果を表１に示す。
【００２９】
【表１】

Figure 0004872162
【００３０】
表１に示した結果によれば、本発明による電池は従来例の電池に比較して高温で長期間放置しても開弁圧が異常に大きくならず、一定値を保持できることがわかる。また、電槽化成後に本発明において特定する安全弁付栓に取り替えた制御弁式鉛蓄電池は、高温下に長期間放置しても開弁圧をさらに一定値に保持できる。
【００３１】
【発明の効果】
以上のように本発明の構成によれば、高温で長期間使用しても制御弁式鉛蓄電池の開弁圧の異常上昇を抑制することができる。これにより電池内圧の異常上昇を抑制する。結果として電池内圧上昇による電槽の変形を抑制でき、安全で高信頼性を有する制御弁式鉛蓄電池を得ることができることから工業上極めて価値のあるものである。
【図面の簡単な説明】
【図１】本発明の実施の形態による制御弁式鉛蓄電池の要部断面図
【図２】本発明の実施の形態の安全弁付栓の外観斜視図
【図３】同安全弁付栓を構成する部品を示す分解斜視図
【図４】従来例による制御弁式鉛蓄電池の要部断面図
【符号の説明】
１，２１ 蓋
２，１８ 排気孔
３，１８ａ 排気筒
４ キャップ状ゴム弁
５，１４ 弁体蓋
５ａ 突起
６ 栓
７，１５ 排気フィルタ
１０ 安全弁付栓
１１ 栓本体
１２ ゴム板弁
１３ 弁押えマット
１６ 栓カバー
１７ 排出口
１７ａ 開口面
１７ｂ 開口部
１９ 凹部
２０ 間隔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a control valve type lead storage battery having an improved safety valve portion.
[0002]
[Prior art]
As shown in FIG. 4, for example, a safety valve portion used in a conventional control valve type lead-acid battery is provided in an exhaust cylinder 3 formed around an exhaust hole 2 provided in a lid 1 for closing a battery case (not shown). The cap rubber valve 4 is mounted. Such a cap-like rubber valve 4 is fixed by a stopper 6 through a valve body lid 5. The plug 6 is provided with an exhaust filter 7 for preventing ignition from a spark from outside the battery.
[0003]
Further, in order to prevent the air permeability of the exhaust filter 7 from being impaired due to the valve body lid 5 being in close contact with the exhaust filter 7, the valve body lid 5 is provided with a protrusion 5a. The projection 5a ensures a space between the exhaust filter 7 and the valve body lid 5, so that the exhaust filter 7 and the valve body lid 5 are not in close contact with each other.
[0004]
Here, the exhaust tube 3 is made of ABS resin or polypropylene resin which is the material of the lid 1, and the cap-shaped rubber valve 4 is made of chloroprene rubber or ethylene / propylene rubber, and between the cap-shaped rubber valve 4 and the exhaust tube 3. A safety valve is configured by applying an acid-resistant liquid sealant such as silicone oil.
[0005]
In general, a safety valve in a control valve type lead-acid battery opens when the internal pressure of the battery increases due to gas generation due to electrolysis of water, etc., and closes once the gas is released, and the oxygen gas is absorbed by the negative electrode plate, resulting in a reduced pressure state. In this case, it is necessary to close the valve in order to prevent outside air from flowing into the storage battery.
[0006]
However, in the conventional control valve type lead-acid battery as described above, when used at a high temperature for a long period of time, sticking occurs at the interface between the cap-shaped rubber valve and the valve cylinder, and the valve opening pressure becomes abnormally large. There is a problem that fatigue pressure breaks at a portion where stress due to the internal pressure of the battery case, the lid, and the joint is concentrated due to the internal pressure exceeding the specified value being applied to the battery case and the lid.
[0007]
The cause of the abnormal increase in valve opening pressure due to the sticking between the cap-shaped rubber valve and the valve cylinder is that the interface between the cap-shaped rubber valve and the valve cylinder is altered by sulfuric acid that has entered the contact surface. This is because the cap-shaped rubber valve is held by the valve cylinder by the contraction force of the rubber that constitutes the cap-shaped rubber valve, so that the transition of the plasticizer contained in the rubber is promoted and the interface between the two is altered.
[0008]
[Problems to be solved by the invention]
The present invention solves the problem of the abnormal increase in valve opening pressure generated in such a control valve type lead-acid battery and the resulting deformation and breakage of the battery case. It aims at providing the control valve type lead acid battery which has.
[0009]
[Means for Solving the Problems]
In order to solve this problem, the invention according to claim 1 of the present invention is a control valve type lead-acid battery in which a stopper with a safety valve is attached to a lid so as to close an exhaust hole provided corresponding to a cell. The safety valve plug is provided with a discharge port facing the exhaust hole, and an opening located on the opposite side of the exhaust port in the discharge port is closed with a flat rubber plate valve, and the exhaust hole and the discharge port are closed. The control valve type lead acid battery characterized by providing a space | interval between the opening part of an exit is shown.
[0010]
According to a second aspect of the present invention, in the control valve type lead-acid battery having the configuration according to the first aspect, the rubber plate valve is formed by the valve body cover via a valve presser mat that is elastically deformed in the thickness direction. The structure hold | maintained at the stopper with a safety valve is shown.
[0011]
According to a third aspect of the present invention, in the control valve type lead storage battery having the configuration according to the first or second aspect, an exhaust filter is provided in the stopper with a safety valve between the discharge port and the outside of the battery. The configuration is shown.
[0012]
According to a fourth aspect of the present invention, in the control valve type lead-acid battery having the structure according to any one of the first to third aspects, at least a portion of the stopper with a safety valve that contacts the rubber plate valve is made of polypropylene resin. It is characterized by comprising.
[0013]
According to a fifth aspect of the present invention, there is provided a control valve-type lead-acid battery according to any one of the first to fourth aspects, wherein a plug with a safety valve is attached after completion of battery case formation or after completion of initial charge. The manufacturing method of a valve-type lead acid battery is shown.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
FIG. 1 is a diagram showing a cross-section of a main part of a control valve type lead storage battery according to an embodiment of the present invention. FIG. 2 is an external perspective view of the safety valve plug 10 of the control valve type lead storage battery according to the embodiment of the present invention. FIG. 3 is an exploded perspective view showing components of the safety valve plug 10.
[0016]
A safety valve stopper 10 shown in FIG. 2 includes a flat rubber plate valve 12 on a stopper body 11, a valve presser mat 13 that can be elastically deformed in the thickness direction, such as a sponge, and a valve body lid 14 as shown in FIGS. In addition, the exhaust filter 15 is positioned, and the plug body 11 and the plug cover 16 are integrated by heat welding or ultrasonic welding.
[0017]
As shown in FIG. 1, in the control valve type lead-acid battery (hereinafter simply referred to as a battery) of the present invention, the plug body 11 corresponds to an exhaust hole 18 provided with a discharge port 17 facing a cell constituting the battery. Is provided. A flat rubber plate valve 12 is placed on an opening surface 17 a located on the opposite side of the exhaust port 17 from the exhaust port 18 so as to close the exhaust port 17. Furthermore, a valve presser mat 13 and a valve body lid 14 are provided thereon. An exhaust filter 15 is provided in the plug cover 16.
[0018]
The concave portion 19 of the stopper body 11 is a portion that accommodates the sponge-like valve presser mat 13 and the flat rubber plate valve 12, and has a sponge-like valve presser mat within the accommodation height constituted by the valve body lid 14. 13 is compressed to a certain thickness, and the entire surface of the flat rubber plate valve 12 is pressed and arranged. In addition, it is also possible to use what formed this valve presser mat 13 and the rubber plate valve 12 integrally.
[0019]
The valve presser mat 13 is compressed to press the rubber plate valve 12 against the opening surface 17a of the discharge port 17, and is further compressed when the battery internal pressure rises, so that it is interposed between the rubber plate valve 12 and the discharge port 17. As long as the action of forming the exhaust path is obtained, in addition to the above-described sponge material, the material is deformed in the thickness direction according to the compressive force and elastically deformed so that the thickness is restored as the compressive force is reduced. Anything is acceptable.
[0020]
In the present invention, an interval 20 is provided between the exhaust hole 18 and the opening 17b of the exhaust port 17 on the exhaust hole 18 side. Even if there is a splash of sulfuric acid in the vicinity of the exhaust hole 18, this interval 20 makes it difficult for the sulfuric acid to move to the discharge port 17, and the contact between the flat rubber plate valve 12 and sulfuric acid can be suppressed. Therefore, it is possible to suppress an abnormal increase in the valve opening pressure due to sticking of the flat rubber plate valve 12 and the discharge port 17 as in the prior art and battery cell deformation due to this.
[0021]
Further, by making the inner diameter of the conventional cap-shaped rubber valve 4 shown in FIG. 4 smaller than the outer diameter of the exhaust tube 3, the inner wall of the cap-shaped rubber valve 4 is expanded by the elasticity of the cap-shaped rubber valve 4 itself. Is always pressed against the outer wall of the exhaust tube 3.
[0022]
In such a conventional safety valve, the transition of the plasticizer from the cap-shaped rubber valve 4 to the exhaust pipe 3 was remarkable. However, in the configuration of the present invention, the transition of the plasticizer is smaller than that in the conventional configuration. Few. This is because the flat rubber plate valve 12 is compressed only by the repulsive force held by the sponge-like valve presser mat 13 and is pressed against the opening surface 17 a of the discharge port 17. It is guessed. As described above, it is difficult to transfer the plasticizer from the flat rubber plate valve 12 to the opening surface 17a due to the difference between the configuration of the conventional example and the present invention, and the above-described sulfuric acid is not scattered to the discharge port 17. In addition, according to the configuration of the present invention, the abnormal increase in the valve opening pressure, which has been a problem in the control valve type lead storage battery of the conventional configuration, and the occurrence of the phenomenon such as the increase in the internal pressure of the battery and the deformation of the battery case are suppressed. be able to.
[0023]
In the present invention, it is preferable that the safety valve plug 10 is attached to the battery after the battery is formed or initially charged. This is because the amount of gas generated at the time of charging is large at the time of battery case formation and initial charging, and it is in a situation where splashes of sulfuric acid are likely to occur. In this case, the conventional cap-shaped rubber valve 4 may be attached to the exhaust cylinder 18a in order to suppress the inflow of air into the battery during battery case formation and initial charging.
[0024]
Of course, the effect of the present invention can be obtained remarkably even if the battery case is formed or the initial charging is performed in a state where the safety valve plug 10 specified in the present invention is attached to the battery, but the safety valve is attached at the timing as described above. If the plug 10 is attached to the battery, the effect can be obtained more remarkably.
[0025]
Furthermore, if the opening surface 17a with which the flat rubber plate valve 12 contacts is made of polypropylene resin, sticking between the rubber plate valve 12 and the opening surface 17a can be further suppressed.
[0026]
【Example】
The comparative evaluation was performed using the control valve type lead storage battery of the safety valve structure of the present invention and the control valve type lead storage battery of the conventional safety valve structure. As an embodiment of the present invention, a battery with a conventional ethylene / propylene rubber cap-shaped rubber valve 4 attached to the exhaust hole after injection, and the cap-shaped rubber valve 4 is removed after the formation of the battery case and a safety valve plug 10 is attached A battery having a safety valve plug 10 attached thereto after injection and battery cell formation was produced as battery B. In the examples of the present invention, the lid 21 was made of polypropylene resin, and the flat rubber plate valve 12 was made of ethylene / propylene rubber.
[0027]
As the battery of the conventional example, after injecting into the battery in the configuration shown in FIG. 4, a cap-like rubber valve 4 made of ethylene / propylene rubber is attached to the exhaust tube 3 made of polypropylene resin, and after forming the battery case, the cap-like rubber valve 4 is removed and the sulfuric acid content adhering to the exhaust cylinder 3 is wiped off, and then a battery in which a new cap-like rubber valve is attached to the exhaust cylinder 3 is referred to as a battery C. A battery was formed as a battery D, which was formed in the battery case and was not wiped off the sulfuric acid adhering to the exhaust tube 3 and did not replace the cap-like rubber valve 4 like the battery C.
[0028]
For these batteries A, B, C, and D, the valve opening pressure (initial valve opening pressure) after the formation of the battery case was measured and then opened at 60 ° C for 1 month, 3 months, and 6 months. The pressure was measured. These results are shown in Table 1.
[0029]
[Table 1]
Figure 0004872162
[0030]
According to the results shown in Table 1, it can be seen that the battery according to the present invention does not have an abnormally large valve opening pressure and can maintain a constant value even when left at a high temperature for a long period of time as compared with the conventional battery. In addition, the control valve type lead storage battery replaced with the safety valve plug specified in the present invention after the formation of the battery case can maintain the valve opening pressure at a constant value even when left for a long time at a high temperature.
[0031]
【Effect of the invention】
As described above, according to the configuration of the present invention, an abnormal increase in the valve opening pressure of the control valve type lead-acid battery can be suppressed even when used at a high temperature for a long period of time. This suppresses an abnormal increase in battery internal pressure. As a result, the battery case can be prevented from being deformed due to an increase in the internal pressure of the battery, and a safe and highly reliable control valve type lead storage battery can be obtained, which is extremely valuable industrially.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a control valve type lead-acid battery according to an embodiment of the present invention. FIG. 2 is an external perspective view of a stopper with a safety valve according to an embodiment of the present invention. FIG. 4 is an exploded perspective view showing components. FIG. 4 is a cross-sectional view of the main part of a conventional control valve type lead storage battery.
1, 21 Lid 2, 18 Exhaust hole 3, 18a Exhaust cylinder 4 Cap-shaped rubber valve 5, 14 Valve body lid 5a Projection 6 Plug 7, 15 Exhaust filter 10 Safety valve plug 11 Plug body 12 Rubber plate valve 13 Valve retainer mat 16 Plug cover 17 Discharge port 17a Opening surface 17b Opening 19 Recess 20 Spacing

Claims (5)

セルに対応して設けられた排気孔を閉塞するように安全弁付栓が蓋に装着された制御弁式鉛蓄電池であって、前記安全弁付栓には前記排気孔に対向する排出口が設けられ、前記排出口において前記排気孔の反対側に位置する開口部を平状のゴム板弁で閉塞するとともに、前記排気孔と前記排出口の開口部との間に間隔を設けたことを特徴とする制御弁式鉛蓄電池。A control valve type lead storage battery in which a stopper with a safety valve is attached to a lid so as to close an exhaust hole provided corresponding to a cell, and the outlet with a safety valve is provided with a discharge port facing the exhaust hole. The opening located on the opposite side of the exhaust hole at the discharge port is closed with a flat rubber plate valve, and a space is provided between the exhaust hole and the opening of the discharge port. Control valve type lead acid battery. 前記ゴム板弁は厚み方向に弾性変形する弁押えマットを介して弁体蓋で前記安全弁付栓に保持されたことを特徴とする請求項１に記載の制御弁式鉛蓄電池。  2. The control valve type lead-acid battery according to claim 1, wherein the rubber plate valve is held by the valve stopper with a valve body cover through a valve presser mat that is elastically deformed in the thickness direction. 前記排出口と電池外部との間に排気フィルタを前記安全弁付栓に備えたことを特徴とする請求項１もしくは２に記載の制御弁式鉛蓄電池。  The control valve type lead-acid battery according to claim 1 or 2, wherein an exhaust filter is provided in the stopper with the safety valve between the discharge port and the outside of the battery. 安全弁付栓の少なくとも前記ゴム板弁と接触する部分をポリプロピレン樹脂で構成したことを特徴とする請求項１ないし３のいずれかに記載の制御弁式鉛蓄電池。  The control valve type lead-acid battery according to any one of claims 1 to 3, wherein at least a portion of the stopper with a safety valve that contacts the rubber plate valve is made of polypropylene resin. 請求項１から４のいずれかに記載した制御弁式鉛蓄電池は、電槽化成終了後または初回充電終了後に安全弁付栓を取り付けることを特徴とする制御弁式鉛蓄電池の製造法。  The control valve-type lead acid battery according to any one of claims 1 to 4, wherein a safety valve-attached plug is attached after completion of battery case formation or after completion of initial charge.
JP2001105458A 2001-04-04 2001-04-04 Control valve type lead-acid battery and manufacturing method thereof Expired - Fee Related JP4872162B2 (en)

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