JP2004288396A - Lead-acid battery - Google Patents

Lead-acid battery Download PDF

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Publication number
JP2004288396A
JP2004288396A JP2003076255A JP2003076255A JP2004288396A JP 2004288396 A JP2004288396 A JP 2004288396A JP 2003076255 A JP2003076255 A JP 2003076255A JP 2003076255 A JP2003076255 A JP 2003076255A JP 2004288396 A JP2004288396 A JP 2004288396A
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JP
Japan
Prior art keywords
coin
explosion
space
drive type
proof
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Pending
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JP2003076255A
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Japanese (ja)
Inventor
Masaki Kida
正樹 木多
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Storage Battery Co Ltd
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Japan Storage Battery Co Ltd
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Application filed by Japan Storage Battery Co Ltd filed Critical Japan Storage Battery Co Ltd
Priority to JP2003076255A priority Critical patent/JP2004288396A/en
Publication of JP2004288396A publication Critical patent/JP2004288396A/en
Pending legal-status Critical Current

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Secondary Cells (AREA)
  • Filling, Topping-Up Batteries (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lead-acid battery having a vent plug in which height is lowered with a conventional explosion-proof function kept in a coin drive type vent plug having the explosion-proof function. <P>SOLUTION: A space for temporarily storing hydrogen gas and oxygen gas installed between the upper surface of an explosion-proof filter inside the vent plug and a bottom part of a coin groove is essentially eliminated, and the space is installed between the upper surface of the explosion-proof filter and both outside surface parts of the coin groove. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は鉛蓄電池に関する。
【0002】
【従来の技術】
鉛蓄電池は充電中に副反応として水の電気分解が起こり、次式に示すように酸素ガス(O)と水素ガス(H)が発生する。
O=1/2O+H
上記両ガスは火気があると急激に燃焼する危険性を有している。したがって、蓄電池外に排気された上記ガスに引火しても、その火気が蓄電池内に流入し蓄電池自身が損傷しないように、蓄電池が防爆機能を備えている場合が多い。防爆機能とは、排気部に防爆フィルターを配設して、蓄電池外で引火しても、該防爆フィルターの狭隙構造により蓄電池内への火花の導入を阻止しするものである。防爆フィルターにはセラミックの焼結体に撥水材を焼き付けたものや高分子多孔成型体からなるものが一般的に使用されている。
【0003】
従来では、防爆フィルターを備えた液口栓は、蓄電池の上蓋から突出して装着されているのが一般的であった。しかし、近年、蓄電池のエネルギー密度の向上に対する要望が強くなってきた中で不要な空間部を少しでもなくする必要が生じ、液口栓の上面と蓋上面とが同一面にある形状が採用されることが多くなってきた。
【0004】
その一つに、コインドライブ式液口栓が上げられる。図1(a)はその一例を示す外観斜視図で、11はコインドライブ式液口栓、2はコイン溝、3は前記コイン溝に設けた排気孔、4は筒部をそれぞれ示す。図1(b)は、前記コインドライブ式液口栓11を蓄電池蓋に設けた注液口に装着した状態を示す要部斜視図で、7は電槽、8は蓋、9は蓋に設けた注液口をそれぞれ示す。他の構成部材は図1(a)と同じ番号を付記する。
【0005】
図2は、図1(a)におけるA−A断面図で、3はコイン溝上面に設けた排気孔、5は防爆フィルター、21はコイン溝の底面部、61は底面部21と防爆フィルター5との間に設けた空間部をそれぞれ示す。他の構成部材は図1(a)と同じ番号を付記する。
【0006】
ここでいう、コインドライブ式液口栓という名称は、前記液口栓11を蓋8に設けた注液口9に装着した場合に、図1(b)に示すように液口栓11の上面と鉛蓄電池の蓋8の上面とが同一面になった構造で、液口栓の上面に設けたコイン溝2にコインを装着し、該コインを回転させることによって液口栓を螺着・脱着させる方式に起因している。
【0007】
図2に示すように、排気孔3付近で火花が発生した場合、コイン溝の底面部21と防爆フィルター5の上面との間に設けた空間部61に滞留している水素ガスおよび酸素ガスに引火する。しかし、空間61の容積が小さいので燃焼の規模も小さく、上述したように、フィルターの狭隙構造により、火が蓄電池内に浸入するのを阻止するので、鉛蓄電池の損傷は免れ、急激燃焼は前記空間部61内のみでおさまり、それ以上連続して起こらない。したがって、上記空間部61は、防爆栓が安全に機能するためには必要不可欠な空間であり、図2に示すように一定の高さAmmが必要である。しかし、その分、液口栓の高さ寸法が大きくなり、鉛蓄電池内に無駄な空間部ができることになる。近年、鉛蓄電池のエネルギー密度の向上に対する強い要求がある中で、防爆機能を備えたコインドライブ式液口栓の高さを少しでも低くすることが要望されている。
【0008】
【発明が解決しようとする課題】
本発明が解決しようとする課題は、防爆機能を備えたコインドライブ式液口栓において、従来と変わらない防爆機能を備えながら、前記液口栓の高さを低減し、蓄電池のエネルギー密度向上に寄与するコインドライブ式液口を備えた鉛蓄電池を提供することにある。
【0009】
【課題を解決するための手段】
本発明の課題を解決するための手段として、請求項1によれば、防爆機能を有するコインドライブ式液口栓を備えた鉛蓄電池において、前記コインドライブ式液口栓が、液口栓内に配設された防爆フィルターの上面とコイン溝の底面部との間の空間部を実質上なくした構造であることを特徴とするものである。
【0010】
上述したように、コインドライブ式液口栓が防爆機能を備えるためには、液口栓内に水素ガスおよび酸素ガスを滞留させる空間部が必要で、従来では、該空間部を防爆フィルターの上面とコイン溝の底面部との間に設けていたが、その空間部によって液口栓の高さ寸法が大きくなる問題を抱えていた。それに対して、少しでもエネルギー密度を向上させるために該空間部をなくし、その代わりに、防爆フィルター上面とコイン溝の両外側面部との間に空間部を設けたことに特徴がある。このことによって、図2に示すような高さAmmの空間部なくなり、液口栓の高さを低くできる。
【0011】
ここでの、防爆フィルターとコイン溝の底面部との間の空間部を実質上なくするとは、防爆フィルター上面とコイン溝下面とが接触した状態あるいは僅差の隙間しかなく、液口栓の高さ寸法にほとんど影響を与えない状態をいう。
【0012】
【実施例】
本発明を実施例に基づき、具体的に説明する。
【0013】
図3は、本発明の実施例を示すコインドライブ式液口栓の外観斜視図である。外観では従来品と変わらないが、図1(a)に示す従来の液口栓11の高さB1に対して、図3に示す本発明の液口栓12の高さB2のほうが短くなっているのが特徴である。
【0014】
次に、本発明のコインドライブ式液口栓の構造を図4(a)、(b)および(c)に基づいて説明する。
【0015】
図4(a)は、図3におけるA−A断面図、(b)はB−B断面図、(c)はC−C断面図で、22はコイン溝2の外側面部、62は本発明のコインドライブ式液口栓内に設けた空間部をそれぞれ示す。他の構成部材は図2と同じ番号を付記する。
図4(a)、(b)および(c)に示すように、本発明は、空間部62を防爆フィルター5の上面とコイン溝の両外側面22との間に設けたことが特徴である。そのことによって、防爆フィルター5の上面とコイン溝の底面部21とを接触させた構造が可能で、従来品では必要であった高さAmmの空間がなくなり、液口栓の高さがその分低くなり、蓄電池のエネルギー密度を向上させることができる。
【0016】
次に、JIS D5301に規定されている自動車用鉛蓄電池55D23タイプに図3に示す本発明のコインドライブ式液口栓を装着し、0.1CA(4.8A)の電流で過充電を行った。その際、排気口3の上部にニクロム線を設置し、間歇的に該ニクロム線に電流を流し発熱させ、水素ガスと酸素ガスとを燃焼させる試験を行った。その結果、急激燃焼はニクロム線が発熱したときに連動して起こるだけで、連続して炎になることはなかった。勿論、蓄電池内に火花が入ることもなく、安定した防爆機能を有していることを確認できた。
【0017】
以上のように、本発明のコインドライブ式液口栓を用いることによって、従来と同様の防爆機能を維持しながらも、液口栓の高さを低くすることが可能で、鉛蓄電池のエネルギー密度を向上させることができることが明らかになった。
【0018】
実施例での液口栓では、空間部62に連通している排気孔3はコイン溝2の上面の両端に設けた構造であるが、片方に1個設けた構造でもよい。
【0019】
また、排気孔の径は、コインドライブ式液口栓の大きさを勘案し、適宜選択しうる設計事項である。
【0020】
【発明の効果】
以上説明したように、防爆機能を備えた鉛蓄電池用コインドライブ式液口栓において、該液口栓内に蓄電池から発生した水素ガスおよび酸素ガスを滞留させるための空間部を防爆フィルター上面とコイン溝の両外側面部との間に形成することによって、従来品のような防爆フィルター上面とコイン溝底面部との間に設けていた空間部を実質上なくすることができ、液口栓の高さを低減することが可能で、鉛蓄電池のエネルギー密度の向上に寄与し、その工業的効果が大である。
【0021】
【図面の簡単な説明】
【図1】(a)従来のコインドライブ式液口栓の斜視図。
(b)コインドライブ式液口栓を鉛蓄電池の蓋に設けた注液口に装着した状態を示す斜視図。
【図2】図1(a)における、A−A断面図。
【図3】本発明の実施例を示すコインドライブ式液口栓の斜視図。
【図4】(a)は、図3における、A−A断面図、(b)はB−B断面図、(c)はC−C断面図。
【符号の説明】
11 従来のコインドライブ式液口栓
12 本発明のコインドライブ式液口栓
2 コイン溝
21 コイン溝の底面部
22 コイン溝の外側面部
3 排気孔
4 筒部
5 防爆フィルター
61 従来の液口栓内の空間部
62 本発明の液口栓内の空間部
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lead storage battery.
[0002]
[Prior art]
In a lead storage battery, electrolysis of water occurs as a side reaction during charging, and oxygen gas (O 2 ) and hydrogen gas (H 2 ) are generated as shown in the following equation.
H 2 O = 1 / O 2 + H 2
Both of these gases have the danger of burning rapidly if there is fire. Therefore, even if the gas exhausted to the outside of the battery ignites, the battery often has an explosion-proof function so that the fire does not flow into the battery and damage the battery itself. The explosion-proof function is to dispose an explosion-proof filter in the exhaust part and prevent the introduction of sparks into the storage battery due to the narrow gap structure of the explosion-proof filter even if the battery is ignited outside the storage battery. As the explosion-proof filter, a filter obtained by baking a water-repellent material on a ceramic sintered body or a filter formed of a porous polymer molded body is generally used.
[0003]
Conventionally, a liquid port plug provided with an explosion-proof filter has been generally mounted so as to protrude from an upper lid of a storage battery. However, in recent years, there has been a growing demand for an improvement in the energy density of storage batteries, and it has become necessary to eliminate unnecessary spaces as much as possible. Is increasing.
[0004]
One of them is a coin drive type liquid spout. FIG. 1 (a) is an external perspective view showing one example thereof, wherein 11 is a coin drive type liquid port stopper, 2 is a coin groove, 3 is an exhaust hole provided in the coin groove, and 4 is a cylinder. FIG. 1B is a perspective view of a main part showing a state in which the coin drive type liquid stopper 11 is attached to a liquid inlet provided in a storage battery lid, where 7 is a battery case, 8 is a lid, and 9 is a lid. Are respectively shown. Other components are denoted by the same reference numerals as in FIG.
[0005]
FIG. 2 is a sectional view taken along the line AA in FIG. 1A, 3 is an exhaust hole provided on the upper surface of the coin groove, 5 is an explosion-proof filter, 21 is a bottom portion of the coin groove, 61 is a bottom portion 21 and an explosion-proof filter 5. And the space parts provided between them. Other components are denoted by the same reference numerals as in FIG.
[0006]
Here, the name of the coin drive type liquid port plug is such that when the liquid port plug 11 is attached to the liquid injection port 9 provided on the lid 8, as shown in FIG. And the upper surface of the lid 8 of the lead-acid battery is flush with the coin. The coin is mounted in the coin groove 2 provided on the upper surface of the liquid stopper, and the liquid stopper is screwed / removed by rotating the coin. This is due to the method used.
[0007]
As shown in FIG. 2, when a spark is generated near the exhaust hole 3, the hydrogen gas and the oxygen gas remaining in the space 61 provided between the bottom 21 of the coin groove and the upper surface of the explosion-proof filter 5 are removed. Ignite. However, since the volume of the space 61 is small, the scale of combustion is small, and as described above, the fire is prevented from entering the storage battery by the narrow gap structure of the filter. It fits only in the space 61 and does not occur any more continuously. Therefore, the space 61 is an indispensable space for the explosion-proof plug to function safely, and requires a certain height Amm as shown in FIG. However, the height dimension of the liquid stopper increases accordingly, and a useless space is created in the lead storage battery. In recent years, there has been a strong demand for improving the energy density of lead-acid batteries, and it has been demanded that the height of a coin-drive type liquid spout provided with an explosion-proof function be reduced as much as possible.
[0008]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to improve the energy density of a storage battery by reducing the height of the liquid port plug while providing the same explosion-proof function as a conventional coin-operated liquid port plug with an explosion-proof function. It is an object of the present invention to provide a lead storage battery having a coin drive type liquid port which contributes.
[0009]
[Means for Solving the Problems]
As means for solving the problems of the present invention, according to claim 1, in a lead-acid battery provided with a coin-drive type liquid spout having an explosion-proof function, the coin-drive type liquid spout is provided in the liquid spout. It is characterized in that the space between the upper surface of the disposed explosion-proof filter and the bottom of the coin groove is substantially eliminated.
[0010]
As described above, in order for the coin drive type liquid stopper to have an explosion-proof function, a space for retaining hydrogen gas and oxygen gas is required in the liquid stopper, and conventionally, the space is provided on the upper surface of the explosion-proof filter. And the bottom of the coin groove, but there is a problem that the height of the liquid port plug is increased by the space. On the other hand, in order to improve the energy density even slightly, the space is eliminated, and instead, a space is provided between the upper surface of the explosion-proof filter and both outer side surfaces of the coin groove. As a result, a space having a height of A mm as shown in FIG. 2 is eliminated, and the height of the liquid port plug can be reduced.
[0011]
Here, to substantially eliminate the space between the explosion-proof filter and the bottom of the coin groove means that the top surface of the explosion-proof filter is in contact with the bottom of the coin groove or there is only a small gap, and the height of the liquid port plug is A condition that hardly affects dimensions.
[0012]
【Example】
The present invention will be specifically described based on examples.
[0013]
FIG. 3 is an external perspective view of a coin drive type liquid port stopper showing an embodiment of the present invention. Although the appearance is not different from the conventional product, the height B2 of the liquid port plug 12 of the present invention shown in FIG. 3 is shorter than the height B1 of the conventional liquid port plug 11 shown in FIG. It is characteristic.
[0014]
Next, the structure of the coin drive type liquid port stopper of the present invention will be described with reference to FIGS. 4 (a), (b) and (c).
[0015]
4A is a sectional view taken along the line AA in FIG. 3, FIG. 4B is a sectional view taken along the line BB, FIG. 4C is a sectional view taken along the line CC, 22 indicates the outer surface of the coin groove 2, and 62 indicates the present invention. The space part provided in the coin drive type liquid port stopper of the above is shown, respectively. Other components are denoted by the same reference numerals as in FIG.
As shown in FIGS. 4A, 4B and 4C, the present invention is characterized in that the space 62 is provided between the upper surface of the explosion-proof filter 5 and both outer surfaces 22 of the coin groove. . As a result, a structure in which the top surface of the explosion-proof filter 5 and the bottom portion 21 of the coin groove are in contact with each other is possible. And the energy density of the storage battery can be improved.
[0016]
Next, the coin drive type liquid stopper of the present invention shown in FIG. 3 was attached to the lead-acid battery 55D23 for automobiles specified in JIS D5301, and overcharged with a current of 0.1 CA (4.8 A). . At that time, a test was conducted in which a nichrome wire was installed above the exhaust port 3, an electric current was intermittently applied to the nichrome wire to generate heat, and hydrogen gas and oxygen gas were burned. As a result, the rapid combustion occurred only when the nichrome wire generated heat, and did not become a continuous flame. Of course, it was confirmed that the storage battery had a stable explosion-proof function without sparks.
[0017]
As described above, by using the coin drive type liquid stopper according to the present invention, it is possible to reduce the height of the liquid stopper while maintaining the same explosion-proof function as before, and it is possible to reduce the energy density of the lead storage battery. It has become clear that can be improved.
[0018]
In the liquid port plug according to the embodiment, the exhaust holes 3 communicating with the space 62 are provided at both ends of the upper surface of the coin groove 2, but may be provided one at one side.
[0019]
In addition, the diameter of the exhaust hole is a design item that can be appropriately selected in consideration of the size of the coin drive type liquid port stopper.
[0020]
【The invention's effect】
As described above, in the coin-operated liquid stopper for a lead storage battery having an explosion-proof function, a space for retaining hydrogen gas and oxygen gas generated from the storage battery in the liquid stopper is provided between the upper surface of the explosion-proof filter and the coin. By forming the gap between both outer side surfaces of the groove, the space provided between the top surface of the explosion-proof filter and the bottom surface of the coin groove as in the conventional product can be substantially eliminated, and the height of the liquid port stopper can be reduced. This can contribute to the improvement of the energy density of the lead storage battery, and its industrial effect is great.
[0021]
[Brief description of the drawings]
FIG. 1A is a perspective view of a conventional coin drive type liquid port stopper.
(B) A perspective view showing a state in which a coin drive type liquid port stopper is attached to a liquid inlet provided in a lid of a lead storage battery.
FIG. 2 is a sectional view taken along the line AA in FIG.
FIG. 3 is a perspective view of a coin drive type liquid port stopper showing an embodiment of the present invention.
4A is a sectional view taken along line AA in FIG. 3, FIG. 4B is a sectional view taken along line BB, and FIG. 4C is a sectional view taken along line CC in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Conventional coin drive type liquid port stopper 12 Coin drive type liquid port stopper of the present invention 2 Coin groove 21 Bottom part of coin groove 22 Outer side part of coin groove 3 Exhaust hole 4 Tube part 5 Explosion-proof filter 61 The space 62 inside the liquid port stopper of the present invention

Claims (1)

防爆機能を有するコインドライブ式液口栓を備えた鉛蓄電池において、
前記コインドライブ式液口栓が、液口栓内に配設された防爆フィルターの上面とコイン溝の底面部との間の空間部を実質上なくした構造であることを特徴とする鉛蓄電池。
In a lead-acid battery provided with a coin-drive type liquid stopper with explosion-proof function,
A lead-acid battery, wherein the coin drive type liquid port plug has a structure in which a space between an upper surface of an explosion-proof filter provided in the liquid port plug and a bottom portion of a coin groove is substantially eliminated.
JP2003076255A 2003-03-19 2003-03-19 Lead-acid battery Pending JP2004288396A (en)

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Publication Number Publication Date
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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013117439A (en) * 2011-12-02 2013-06-13 New Cosmos Electric Corp Explosion-proof gas detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013117439A (en) * 2011-12-02 2013-06-13 New Cosmos Electric Corp Explosion-proof gas detector

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