JP7385500B2 - liquid lead acid battery - Google Patents

liquid lead acid battery Download PDF

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JP7385500B2
JP7385500B2 JP2020036685A JP2020036685A JP7385500B2 JP 7385500 B2 JP7385500 B2 JP 7385500B2 JP 2020036685 A JP2020036685 A JP 2020036685A JP 2020036685 A JP2020036685 A JP 2020036685A JP 7385500 B2 JP7385500 B2 JP 7385500B2
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slit
liquid
sleeve
cylindrical body
cell chamber
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JP2021140918A (en
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亮 田井中
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Furukawa Battery 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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  • Filling, Topping-Up Batteries (AREA)

Description

本発明は、液式鉛蓄電池に関する。 The present invention relates to a liquid lead acid battery.

鉛蓄電池には液式のものと制御弁式のものがあり、液式鉛蓄電池は、セル室を備えた電槽と、セル室に電解液とともに収納されている極板群と、を備え、その極板群は、交互に配置された正極板および負極板と、正極板および負極板との間に配置されたセパレータと、からなる積層体を有する。
液式鉛蓄電池の電槽の上面は蓋で封止されている。この蓋は、上板のセル室の上方となる位置に形成された電解液の注入口（液口）を有し、注入口は、上板を貫通する貫通穴およびこの貫通穴に連続してセル室側に延びるスリーブを有し、スリーブに雌ねじが形成されている。この注入口は栓（液口栓）で塞がれている。この栓は、雌ねじに螺合する雄ねじを備えた筒体部、筒体部の軸方向一端を塞ぐ板状の頭部、および頭部の板面を貫通する排気孔を有し、この栓は、雄ねじと雌ねじを螺合させて蓋に装着されている。 There are two types of lead acid batteries: liquid type and valve control type. Liquid type lead acid batteries include a battery case with a cell chamber, and a group of electrode plates stored in the cell chamber together with an electrolyte. The electrode plate group has a laminate including positive electrode plates and negative electrode plates arranged alternately, and a separator arranged between the positive electrode plates and the negative electrode plates.
The top of the liquid lead-acid battery case is sealed with a lid. This lid has an electrolyte inlet (liquid inlet) formed in a position above the cell chamber of the upper plate, and the inlet is connected to a through hole that penetrates the upper plate and to the through hole. It has a sleeve that extends toward the cell chamber, and a female thread is formed in the sleeve. This injection port is closed with a plug (liquid port plug). This stopper has a cylindrical body part equipped with a male thread that engages with a female thread, a plate-shaped head that closes one axial end of the cylindrical body part, and an exhaust hole that passes through the plate surface of the head. , is attached to the lid by screwing together the male and female threads.

また、蓋のスリーブには、セル室側の端面から上板側に延びるスリットが形成されている。さらに、栓の筒体部にも、頭部の反対側の端面から頭部側に延びるスリットが形成されている。電槽における電解液の液面は、液口のスリーブおよび液口栓の筒体部の下端よりも下側に設定されている。
上述のように、液式鉛蓄電池では、液口栓に排気孔を設けることで、電槽内外の圧力が等しくなるようにしている。また、液口のスリーブと液口栓の筒体部の両方にスリットを設けることで、設定された液面より上側に移動した電解液が、設定された液面以下の位置に還流できるようにしている。 Further, the sleeve of the lid is formed with a slit extending from the end surface on the cell chamber side to the upper plate side. Furthermore, a slit extending from the end surface opposite to the head toward the head is also formed in the cylindrical portion of the stopper. The liquid level of the electrolytic solution in the battery container is set below the lower end of the sleeve of the liquid port and the cylindrical body portion of the liquid port stopper.
As mentioned above, in a liquid lead-acid battery, an exhaust hole is provided in the liquid outlet plug to equalize the pressure inside and outside the battery case. In addition, by providing slits in both the sleeve of the liquid port and the cylindrical body of the liquid port plug, the electrolyte that has moved above the set liquid level can flow back to a position below the set liquid level. ing.

電解液に使用される希硫酸の密度は、一般的に、満充電時で１．２８０（ｇ／ｃｍ3）程度であり、凝固点は－７０℃と低い。一方で、アイドリングストップ（ＩＳＳ）車用電池はガッシングがおき難く、電解液の成層化が生じやすい。成層化が生じると、上層部に存在する電解液は、ほぼ水に近い比重となり、凝固点もそれに伴い高くなる。上層部に存在する電解液は、走行時の揺れ等により、液口栓のスリットから液口栓内に浸入する。また、気温の低い日などは、結露した水が排気孔から液口栓へ浸入したりもする。 The density of dilute sulfuric acid used in the electrolytic solution is generally about 1.280 (g/cm 3 ) when fully charged, and the freezing point is as low as -70°C. On the other hand, batteries for start-stop (ISS) vehicles are difficult to cause gassing and are prone to stratification of the electrolyte. When stratification occurs, the electrolytic solution present in the upper layer has a specific gravity almost close to that of water, and the freezing point also increases accordingly. The electrolytic solution present in the upper layer infiltrates into the liquid spout through the slit of the liquid spout due to vibrations and the like during driving. Also, on days when the temperature is low, condensed water may seep into the outlet plug through the exhaust hole.

液口栓内に浸入した比重の低い電解液および水は、重力に従いスリットを通して流れ落ちるが、張力によりスリットの対向する二面に架け渡されてスリットを塞ぐことがある。その状態で凍結すると、液口栓の排気孔が塞がり、空気の経路が遮断され、電槽内外で気圧差が生じる。この状態で凍結した氷が融解すると、電解液が排気孔から噴出したり、これに伴い周囲のシステムを硫酸で汚染したり、その電池を取替える時などに手に付着して薬傷を引き起こしたりする可能性もある。 The low specific gravity electrolyte and water that have entered the liquid port plug flow down through the slit according to gravity, but due to tension, they may span the two opposing sides of the slit and block the slit. If it freezes in this state, the exhaust hole of the liquid port plug will be blocked, the air path will be cut off, and a pressure difference will occur between the inside and outside of the container. If the frozen ice melts in this state, the electrolyte will spout out of the exhaust vents, contaminating surrounding systems with sulfuric acid, and may get on your hands when replacing batteries, causing chemical burns. There is a possibility that it will.

特許文献１には、液栓本体の頂板部に支持された筒部が防爆フィルタを貫通して防爆フィルタの下面に開口され、筒部内に形成されている孔は液栓本体内の圧力の上昇で破れる隔壁で閉塞されている液式鉛蓄電池が記載されている。これによれば、防爆フィルタの目詰まりによる内圧上昇は防止できるが、液口栓内に浸入した比重の低い電解液および水が、張力によりスリットの対向する二面に架け渡されてスリットを塞ぐことを防止することはできない。 Patent Document 1 discloses that a cylindrical part supported by the top plate of a liquid faucet body penetrates an explosion-proof filter and opens on the lower surface of the explosion-proof filter, and a hole formed in the cylindrical part prevents a rise in pressure within the liquid faucet body. A liquid lead-acid battery is described that is blocked by a septum that can be ruptured. According to this, an increase in internal pressure due to clogging of the explosion-proof filter can be prevented, but the low specific gravity electrolyte and water that have entered the liquid port plug are bridged between the two opposing sides of the slit due to tension and block the slit. It is not possible to prevent this from happening.

特許文献２には、振動時の溢液性能（電解液が液口から溢れにくくなる性能）は液口栓の筒部のスリットの幅に大きく依存しており、高い溢液性能を確保する観点から、このスリットの幅を５ｍｍ未満にすることが好ましく、３ｍｍ以下にすることがより好ましいと記載されている。また、筒状ウェル（液口のスリーブ）のスリットの幅については、より高度な溢液性能を得る観点から８ｍｍ以下が好ましいと記載されている。さらに、特許文献２の図４では、電槽の蓋に液口栓が取り付けられた状態で、液口栓の筒部のスリットと筒状ウェル（液口のスリーブ）のスリットがずれた状態となっている。 Patent Document 2 states that the overflow performance during vibration (performance that prevents the electrolyte from overflowing from the liquid opening) is largely dependent on the width of the slit in the cylindrical part of the liquid opening plug, and there is a point of view to ensure high overflow performance. Therefore, it is described that the width of this slit is preferably less than 5 mm, and more preferably 3 mm or less. Furthermore, it is stated that the width of the slit in the cylindrical well (liquid opening sleeve) is preferably 8 mm or less from the viewpoint of obtaining a higher level of overflow performance. Furthermore, in FIG. 4 of Patent Document 2, the slit of the cylindrical part of the liquid spout and the slit of the cylindrical well (sleeve of the liquid spout) are misaligned when the liquid spout is attached to the lid of the battery container. It has become.

特開２００３－２１７５４５号公報Japanese Patent Application Publication No. 2003-217545 特開２０１８－１９５５０８号公報Japanese Patent Application Publication No. 2018-195508

本発明の課題は、液口栓内に浸入した比重の低い電解液および水が、張力によりスリットの対向する二面に架け渡されてスリットを塞ぐことが防止できる液式鉛蓄電池を提供することである。 An object of the present invention is to provide a liquid lead-acid battery that can prevent the low specific gravity electrolytic solution and water that have entered the liquid port plug from spanning over two opposing sides of the slit due to tension and blocking the slit. It is.

上記課題を解決するために、本発明の一態様は、下記の構成(a)～(e)を備えた液式鉛蓄電池を提供する。
(a)セル室を備えた電槽と、セル室に電解液とともに収納されている極板群と、電槽の上面を封止している蓋であって、上板のセル室の上方となる位置に形成された電解液の注入口を有し、注入口は、上板を貫通する貫通穴および貫通穴に連続してセル室側に延びるスリーブを有し、このスリーブに雌ねじが形成されている蓋と、を備える。
(b)注入口を塞ぐ栓であって、蓋のスリーブの雌ねじに螺合する雄ねじを備えた筒体部、筒体部の軸方向一端を塞ぐ板状の頭部、および頭部の板面を貫通する排気孔を有し、筒体部の雄ねじとスリーブの雌ねじを螺合させて蓋に装着されている栓と、を備える。
(c)蓋のスリーブは、セル室側の端面から上板側に延びる第一のスリットを有する。
(d)栓の筒体部は、頭部の反対側の端面から頭部側に延びる第二のスリットを有する。
(e)第一のスリットおよび第二のスリットが、スリーブおよび筒体部の径方向に沿った側面視で重なる部分を有する。 In order to solve the above problems, one embodiment of the present invention provides a liquid lead acid battery having the following configurations (a) to (e).
(a) A battery case with a cell chamber, a group of electrode plates stored together with an electrolyte in the cell chamber, and a lid that seals the top surface of the battery case, with the upper plate above the cell chamber The injection port has a through hole that penetrates the upper plate and a sleeve that extends to the cell chamber side continuously from the through hole, and the sleeve has an internal thread formed therein. It is equipped with a lid and a lid.
(b) A stopper for blocking the inlet, which includes a cylindrical body portion equipped with a male thread that engages with the female thread of the sleeve of the lid, a plate-shaped head that closes one axial end of the cylindrical body, and a plate surface of the head. and a plug attached to the lid by screwing together the male thread of the cylindrical body and the female thread of the sleeve.
(c) The sleeve of the lid has a first slit extending from the end surface on the cell chamber side to the upper plate side.
(d) The cylindrical body portion of the stopper has a second slit extending from the end surface opposite to the head toward the head.
(e) The first slit and the second slit have an overlapping portion in a side view along the radial direction of the sleeve and the cylindrical body.

本発明によれば、液口栓内に浸入した比重の低い電解液および水が張力によりスリットの対向する二面に架け渡されてスリットを塞ぐことを防止可能な液式鉛蓄電池が提供できる。 According to the present invention, it is possible to provide a liquid lead-acid battery that can prevent the low specific gravity electrolytic solution and water that have entered the liquid port stopper from being bridged by tension between the two opposing sides of the slit and blocking the slit.

実施形態の液式鉛蓄電池を説明する図であって、電槽から蓋を外した状態を示している。FIG. 2 is a diagram illustrating the liquid lead-acid battery according to the embodiment, showing a state in which the lid is removed from the battery case. 実施形態の液式鉛蓄電池を構成する蓋の電槽に向ける面を示す図である。FIG. 3 is a diagram showing a surface of a lid constituting the liquid lead-acid battery according to the embodiment, which faces toward the battery case. 実施形態の液式鉛蓄電池が有する注入口を塞ぐ栓を示す正面図である。FIG. 2 is a front view showing a stopper that closes an injection port of the liquid lead-acid battery according to the embodiment. 蓋が有する一つの注液口に栓（防沫栓は省略）が装着された状態を、蓋の内面の側から見た図である。FIG. 3 is a view of a state in which a stopper (splash-proof stopper is omitted) is attached to one liquid inlet of the cover, viewed from the inner surface side of the cover. 図４のＡ－Ａ断面図であって、左半分は栓が装着される前の状態を示している。FIG. 4 is a sectional view taken along the line AA in FIG. 4, and the left half shows the state before the stopper is attached.

以下、本発明の実施形態について説明するが、本発明は以下に示す実施形態に限定されない。以下に示す実施形態では、本発明を実施するために技術的に好ましい限定がなされているが、この限定は本発明の必須要件ではない。
図１に示すように、この実施形態の液式鉛蓄電池１０は、電槽１と蓋２と六個の極板群３を備える。電槽１の形状は直方体であり、電槽１は、底面をなす長方形の一対の長辺上に形成された一対の第一の壁１１と、一対の短辺上に形成された一対の第二の壁１２を有する。電槽１の内部は、第二の壁１２と平行な五枚の隔壁１３により、六個のセル室４に区画されている。図１に示すように、セル室４の配列方向をＸ方向、これに垂直な方向をＹ方向とする。六個のセル室４には、それぞれ一個の極板群３が配置されている。また、液式鉛蓄電池１０はセル室４毎に一個の液口栓５を備える。 Embodiments of the present invention will be described below, but the present invention is not limited to the embodiments shown below. In the embodiments shown below, technically preferable limitations are made for carrying out the present invention, but these limitations are not essential to the present invention.
As shown in FIG. 1, the liquid lead-acid battery 10 of this embodiment includes a battery case 1, a lid 2, and six electrode plate groups 3. The shape of the battery case 1 is a rectangular parallelepiped, and the battery case 1 has a pair of first walls 11 formed on a pair of long sides of a rectangle forming a bottom surface, and a pair of first walls 11 formed on a pair of short sides of a rectangle forming a bottom surface. It has two walls 12. The inside of the battery case 1 is divided into six cell chambers 4 by five partition walls 13 parallel to the second wall 12. As shown in FIG. 1, the direction in which the cell chambers 4 are arranged is the X direction, and the direction perpendicular to this is the Y direction. One electrode plate group 3 is arranged in each of the six cell chambers 4. Furthermore, the liquid lead-acid battery 10 includes one liquid port plug 5 for each cell chamber 4.

各極板群３は、交互に配置された複数枚の正極板および負極板と、正極板と負極板との間に配置されたセパレータと、からなる積層体３１を有する。
正極板は、格子状基板と格子状基板から上側に突出する耳部とを有する集電体の格子状基板に、正極合剤（正極活物質を含む合剤）が保持されたものである。負極板は、格子状基板と格子状基板から上側に突出する耳部とを有する集電体の格子状基板に、負極合剤（負極活物質を含む合剤）が保持されたものである。複数枚の正極板および負極板は、セパレータを介して交互に配置されている。積層体を構成する負極板の枚数は正極板の枚数よりも一枚多くても良いし、同じでも良い。 Each electrode plate group 3 has a laminate 31 including a plurality of positive and negative electrode plates arranged alternately and a separator arranged between the positive and negative electrode plates.
The positive electrode plate has a positive electrode mixture (mixture containing a positive electrode active material) held on a grid-like substrate of a current collector having a grid-like substrate and ears projecting upward from the grid-like substrate. The negative electrode plate has a negative electrode mixture (mixture containing a negative electrode active material) held on a grid-like substrate of a current collector having a grid-like substrate and ears projecting upward from the grid-like substrate. The plurality of positive electrode plates and negative electrode plates are arranged alternately with separators interposed therebetween. The number of negative electrode plates constituting the laminate may be one more than the number of positive electrode plates, or may be the same.

負極板は袋状セパレータ内に収納されている。そして、負極板が入った袋状セパレータと正極板とを交互に重ねることで、正極板と負極板との間にセパレータが配置された状態となっている。なお、正極板を袋状セパレータ内に収納して、負極板と交互に重ねてもよい。
また、各極板群３は、積層体の正極板および負極板をそれぞれ幅方向の別の位置で連結する正極ストラップ３２および負極ストラップ３３と、正極ストラップ３２および負極ストラップ３３からそれぞれ立ち上がる正極中間極柱３２１および負極中間極柱３３１を有する。正極ストラップおよび負極ストラップは、正極板および負極板の耳部をそれぞれ連結している。 The negative electrode plate is housed within a bag-shaped separator. Then, by alternately stacking the bag-shaped separators containing the negative electrode plates and the positive electrode plates, the separator is placed between the positive electrode plate and the negative electrode plate. Note that the positive electrode plates may be housed in a bag-like separator and stacked alternately with the negative electrode plates.
In addition, each electrode plate group 3 includes a positive electrode strap 32 and a negative electrode strap 33 that connect the positive electrode plate and the negative electrode plate of the laminate at different positions in the width direction, and a positive electrode intermediate electrode that rises from the positive electrode strap 32 and the negative electrode strap 33, respectively. It has a pillar 321 and a negative intermediate pole 331. The positive electrode strap and the negative electrode strap connect the ears of the positive electrode plate and the negative electrode plate, respectively.

セル配列方向の両端のセル室４に配置された正極ストラップおよび負極ストラップには、それぞれ小片部を介して外部端子となる正極極柱３５および負極極柱３６が形成されている。また、一方のセル室４の正極中間極柱３２１と他方のセル室４内の負極中間極柱３３１とが、隔壁１３に形成された貫通孔内を埋める金属部で接続されている。
図２に示すように、蓋２は、電槽１の隔壁１３に対応する五枚の仕切り板２３と、長方形の上板２４を有する。上板２４は六個の貫通孔２４１を有する。六個の貫通孔２４ａは、上板２４の五枚の仕切り板２３で区切られた各位置に形成されている。 A positive pole pole 35 and a negative pole pole 36, which serve as external terminals, are respectively formed on the positive pole strap and the negative pole strap arranged in the cell chambers 4 at both ends in the cell arrangement direction via small pieces. Further, the positive intermediate pole 321 in one cell chamber 4 and the negative intermediate pole 331 in the other cell chamber 4 are connected by a metal portion that fills the through hole formed in the partition wall 13 .
As shown in FIG. 2, the lid 2 has five partition plates 23 corresponding to the partition walls 13 of the battery case 1, and a rectangular top plate 24. The upper plate 24 has six through holes 241. The six through holes 24a are formed at each position of the upper plate 24 separated by the five partition plates 23.

上板２４の内面（電槽１と対向させる面）には、貫通孔２４１に連続するスリーブ２５が形成されている。貫通孔２４１とスリーブ２５が注液口（電解液の注入口）２６を構成する。注液口２６は液口栓５で塞がれる。スリーブ２５は二本のスリット（第一のスリット）２５ａと雌ねじ部２５ｂを有する。二本のスリット２５ａは、互いに１８０°となる位置に形成され、Ｘ方向に沿って対向している。スリーブ２５の外周部にフランジ２７が形成されている。また、蓋２は、電槽１に対する位置決め用のガイドリブ６と、正極極柱および負極極柱を通すスリーブ７を有する。 A sleeve 25 continuous to the through hole 241 is formed on the inner surface of the upper plate 24 (the surface facing the battery case 1). The through hole 241 and the sleeve 25 constitute a liquid injection port (electrolyte injection port) 26. The liquid injection port 26 is closed with a liquid port stopper 5. The sleeve 25 has two slits (first slits) 25a and a female threaded portion 25b. The two slits 25a are formed at 180 degrees from each other and face each other along the X direction. A flange 27 is formed on the outer periphery of the sleeve 25. Further, the lid 2 has a guide rib 6 for positioning with respect to the battery case 1, and a sleeve 7 through which the positive pole pole and the negative pole pole pass.

図３に示すように、液口栓５は、筒体部５１と、その軸方向一端に形成された頭部５２を有する。筒体部５１の頭部５２側の外周に雄ねじ部５３が形成されている。筒体部５１の頭部５２とは反対側の端部に、スリット（第二のスリット）５１ａが形成されている。頭部５２は、大径部５２１と小径部５２２とからなり、板面を貫通する排気孔５２ａを有する。なお、筒体部５１の中には、別部品である防沫栓が配置されている。
液口栓５の筒体部５１のスリット５１ａは、液口栓５の正面図（図３）における形状（正面形状）が長方形である。なお、蓋２のスリーブ２５の二本のスリット２５ａも、スリーブ２５の正面図における形状（正面形状）が長方形である。 As shown in FIG. 3, the liquid spout 5 has a cylindrical body portion 51 and a head portion 52 formed at one end in the axial direction. A male threaded portion 53 is formed on the outer periphery of the cylindrical body portion 51 on the head 52 side. A slit (second slit) 51a is formed at the end of the cylindrical body portion 51 opposite to the head 52. The head 52 consists of a large diameter part 521 and a small diameter part 522, and has an exhaust hole 52a passing through the plate surface. Note that a splash-proof stopper, which is a separate component, is arranged inside the cylindrical body portion 51.
The slit 51a of the cylindrical body portion 51 of the liquid spout 5 has a rectangular shape (front shape) in the front view of the liquid spout 5 (FIG. 3). The two slits 25a of the sleeve 25 of the lid 2 also have a rectangular shape in a front view of the sleeve 25 (front shape).

図５に示すように、上板２４の貫通孔２４１とスリーブ２５の上端面２５１により、液口栓５の頭部５２の外縁部が収まる凹部が形成されている。スリーブ２５のスリット２５ａは、下端面（セル室４側の端面）２５２から上板２４側に延びており、フランジ２７に近い位置まで深く形成されている。雌ねじ部２５ｂはスリーブ２５の内周面の基端部にのみ形成されている。
図５の右半分と図４は、注液口２６が液口栓５で塞がれた状態を示しているが、防沫栓は省略されている。これらの図に示すように、この状態で、注液口２６のスリット２５ａと液口栓５のスリット５１ａが、スリーブ２５および筒体部５１の径方向に沿った側面視で重なっている。 As shown in FIG. 5, the through hole 241 of the upper plate 24 and the upper end surface 251 of the sleeve 25 form a recess into which the outer edge of the head 52 of the liquid spout 5 is accommodated. The slit 25a of the sleeve 25 extends from the lower end surface (end surface on the cell chamber 4 side) 252 toward the upper plate 24 side, and is formed deeply to a position close to the flange 27. The female threaded portion 25b is formed only at the proximal end of the inner peripheral surface of the sleeve 25.
The right half of FIG. 5 and FIG. 4 show a state in which the liquid inlet 26 is closed with the liquid port stopper 5, but the splash-proof stopper is omitted. As shown in these figures, in this state, the slit 25a of the liquid injection port 26 and the slit 51a of the liquid port stopper 5 overlap in a side view along the radial direction of the sleeve 25 and the cylindrical body portion 51.

図５に示すように、蓋２のスリーブ２５のスリット（第一のスリット）２５ａの長さＬ１は、スリーブ２５の長さＬ１１の５／６以下である（Ｌ１／Ｌ１１≦５／６）。液口栓５の筒体部５１のスリット（第二のスリット）５１ａの長さＬ２は、筒体部５１の長さＬ２１の１／２以下である（Ｌ２／Ｌ２１≦１／２）。また、スリーブ２５のスリット（第一のスリット）２５ａの長さＬ１は、筒体部５１のスリット（第二のスリット）５１ａの長さＬ２よりも長い（Ｌ１＞Ｌ２）。 As shown in FIG. 5, the length L1 of the slit (first slit) 25a of the sleeve 25 of the lid 2 is 5/6 or less of the length L11 of the sleeve 25 (L1/L11≦5/6). The length L2 of the slit (second slit) 51a of the cylindrical body portion 51 of the liquid spout 5 is equal to or less than 1/2 of the length L21 of the cylindrical body portion 51 (L2/L21≦1/2). Further, the length L1 of the slit (first slit) 25a of the sleeve 25 is longer than the length L2 of the slit (second slit) 51a of the cylindrical body portion 51 (L1>L2).

液式鉛蓄電池１０は、例えば以下の方法で製造できる。
先ず、公知の方法で作製された化成前の極板群３を、電槽１の各セル室４に配置した後、抵抗溶接を行って金属部を形成する。次に、電槽１の上面と蓋２の下面を熱で溶かして、熱溶着により電槽１に蓋２を固定する。なお、蓋２を電槽１に載せる際に、電槽１の隔壁１３、第一の壁１１、および第二の壁１２の上端面は、蓋２のガイドリブ６に案内されて、スムーズに蓋２の仕切り板２３、第一の壁２１、および第二の壁２２の下端面と当接する。その結果、セル室４の上側に蓋２による上部空間が形成される。 The liquid lead-acid battery 10 can be manufactured, for example, by the following method.
First, a group of electrode plates 3 before chemical formation produced by a known method is placed in each cell chamber 4 of the battery case 1, and then resistance welding is performed to form a metal part. Next, the top surface of the battery case 1 and the bottom surface of the lid 2 are melted with heat, and the lid 2 is fixed to the battery case 1 by heat welding. Note that when placing the lid 2 on the battery case 1, the upper end surfaces of the partition wall 13, first wall 11, and second wall 12 of the battery case 1 are guided by the guide ribs 6 of the lid 2, and the lid is smoothly placed. The second partition plate 23 , the first wall 21 , and the lower end surface of the second wall 22 come into contact with each other. As a result, an upper space is formed above the cell chamber 4 by the lid 2.

次に、各注液口２６から各セル室４内に電解液を注入する。次に、注液口２６に液口栓５の筒体部５１を入れて、液口栓５の雄ねじ部５３をスリーブ２５の雌ねじ部２５ｂに螺合することで、各注液口２６を液口栓５で塞ぐ。
なお、注液口２６のスリット２５ａおよび液口栓５のスリット５１ａの径方向での位置は、設定された締めつけトルクで注液口２６に液口栓５を取り付けた際に、注液口２６のスリット２５ａと液口栓５のスリット５１ａが、スリーブ２５および筒体部５１の径方向に沿った側面視で重なる部分を有する状態となる（理想的には図４に示す状態となる）ように設計する。 Next, an electrolytic solution is injected into each cell chamber 4 from each inlet 26 . Next, by inserting the cylindrical body part 51 of the liquid inlet plug 5 into the liquid inlet 26 and screwing the male threaded part 53 of the liquid inlet plug 5 into the female threaded part 25b of the sleeve 25, each liquid inlet 26 is opened. Close with plug 5.
Note that the positions in the radial direction of the slit 25a of the liquid inlet 26 and the slit 51a of the liquid inlet plug 5 are such that when the liquid inlet plug 5 is attached to the liquid inlet 26 with the set tightening torque, The slit 25a of the liquid port plug 5 and the slit 51a of the liquid port plug 5 have an overlapping portion in a side view along the radial direction of the sleeve 25 and the cylindrical body portion 51 (ideally, as shown in FIG. 4). to be designed.

注液口２６のスリット２５ａの幅Ｓ１、液口栓５のスリット５１ａの幅Ｓ２、および注液口２６のスリーブ２５と液口栓５の筒体部５１との距離Ｋが小さいほど（例えば、注液口２６および液口栓５が共にポリプロピレン製の場合、いずれも３ｍｍ以下の場合）、「設定された液面より上側に移動した電解液が、注液口２６のスリット２５ａから液口栓５のスリット５１ａに浸入して、排気孔５２ａから電解液が溢れることを抑制する作用」は大きくなるが、「液口栓内に浸入した比重の低い電解液および水が、張力によりスリットの対向する二面に架け渡されてスリットを塞ぐ現象」が生じやすくなる。 The smaller the width S1 of the slit 25a of the liquid inlet 26, the width S2 of the slit 51a of the liquid inlet plug 5, and the distance K between the sleeve 25 of the liquid inlet 26 and the cylindrical body part 51 of the liquid inlet plug 5 (for example, When the liquid inlet 26 and the liquid inlet plug 5 are both made of polypropylene, and both have a thickness of 3 mm or less), the electrolyte that has moved above the set liquid level flows through the slit 25a of the liquid inlet 26 into the liquid inlet plug. 5, the effect of suppressing the electrolytic solution from entering the slit 51a of No. 5 and overflowing from the exhaust hole 52a is increased. ``The phenomenon where the slit is blocked by being bridged between two sides'' is more likely to occur.

そして、上述の作用を最大限に得るために幅Ｓ１、幅Ｓ２、および距離Ｋを小さくした場合でも、実施形態の液式鉛蓄電池１０は、注液口２６のスリット２５ａと液口栓５のスリット５１ａが、スリーブ２５および筒体部５１の径方向に沿った側面視で重なる部分を有する状態となっているため、上記現象を防止することができる。
また、「Ｌ１／Ｌ１１≦５／６」であること、「Ｌ２／Ｌ２１≦１／２」であること、Ｌ１＞Ｌ２であることは、いずれも「設定された液面より上側に移動した電解液を設定された液面以下の位置に還流させる作用」を大きくできる構成であるため、少なくともいずれかの構成を有することが好ましい。そして、これらの構成を全て有する実施形態の液式鉛蓄電池１０は、「設定された液面より上側に移動した電解液を設定された液面以下の位置に還流させる作用」も大きいものとなる。 Even when the width S1, the width S2, and the distance K are made small in order to obtain the above-mentioned effect to the maximum, the liquid lead-acid battery 10 of the embodiment has a structure in which the slit 25a of the liquid injection port 26 and the liquid port stopper 5 are Since the slit 51a has a portion that overlaps the sleeve 25 and the cylindrical body portion 51 in a radial side view, the above phenomenon can be prevented.
In addition, "L1/L11≦5/6", "L2/L21≦1/2", and L1>L2 all mean "electrolysis that has moved above the set liquid level". It is preferable to have at least one of these configurations because it is a configuration that can increase the effect of refluxing the liquid to a position below the set liquid level. The liquid lead-acid battery 10 according to the embodiment having all of these configurations also has a large effect of refluxing the electrolyte that has moved above the set liquid level to a position below the set liquid level. .

なお、第二のスリット５１ａの幅Ｓ２が第一のスリット２５ａの幅Ｓ１よりも狭いと、「設定された液面より上側に移動した電解液が、注液口２６のスリット２５ａから液口栓５のスリット５１ａに浸入して、排気孔５２ａから電解液が溢れることを抑制する作用」を大きくできるため好ましい。
また、第一のスリット２５ａおよび第二のスリット５１ａの正面形状は、いずれも長方形以外の形状（例えば、半長円形、末広がり状、凸字形）であってもよい。 Note that if the width S2 of the second slit 51a is narrower than the width S1 of the first slit 25a, the electrolyte that has moved above the set liquid level will flow from the slit 25a of the liquid inlet 26 to the liquid inlet plug. This is preferable because it can increase the effect of preventing the electrolyte from entering the slit 51a of No. 5 and overflowing from the exhaust hole 52a.
Further, the front shapes of the first slit 25a and the second slit 51a may be shapes other than rectangles (for example, semi-elliptical, widening toward the end, or convex shape).

１０ 液式鉛蓄電池
１ 電槽
１１ 電槽の第一の壁
１２ 電槽の第二の壁
１３ 隔壁
２ 蓋
２１ 蓋の第一の壁
２２ 蓋の第二の壁
２３ 仕切り板
２４ 蓋の上板
２４１ 上板の貫通孔
２５ スリーブ
２５ａ 注液口のスリット（第一のスリット）
２５１ スリーブの上端面（上板側の端面）
２５２ スリーブの下端面（セル室側の端面）
２６ 注液口（電解液の注入口）
２７ フランジ
３ 極板群
４ セル室
４１ セル室
４２ セル室
５ 液口栓（注入口を塞ぐ栓）
５１ 筒体部
５１ａ 液口栓のスリット（第二のスリット）
５２ 頭部
５２ａ 排気孔
５３ 雄ねじ部
６ ガイドリブ
Ｌ１ 第一のスリットの長さ
Ｌ２ 第二のスリットの長さ
Ｌ１１ スリーブの長さ
Ｌ２１ 筒体部の長さ 10 Liquid lead acid battery 1 Battery case 11 First wall of the battery case 12 Second wall of the battery case 13 Partition wall 2 Lid 21 First wall of the lid 22 Second wall of the lid 23 Partition plate 24 Top plate of the lid 241 Through hole in upper plate 25 Sleeve 25a Slit for liquid injection port (first slit)
251 Upper end surface of sleeve (end surface on upper plate side)
252 Lower end surface of sleeve (end surface on cell chamber side)
26 Liquid injection port (electrolyte injection port)
27 flange 3 electrode plate group 4 cell chamber 41 cell chamber 42 cell chamber 5 liquid port plug (plug that blocks the injection port)
51 Cylindrical body part 51a Slit of liquid port plug (second slit)
52 Head 52a Exhaust hole 53 Male thread 6 Guide rib L1 Length of first slit L2 Length of second slit L11 Length of sleeve L21 Length of cylindrical body

Claims (5)

セル室を備えた電槽と、前記セル室に電解液とともに収納されている極板群と、
前記電槽の上面を封止している蓋であって、上板の前記セル室の上方となる位置に形成された前記電解液の注入口を有し、前記注入口は、前記上板を貫通する貫通穴および前記貫通穴に連続して前記セル室側に延びるスリーブを有し、前記スリーブに雌ねじが形成されている蓋と、
前記注入口を塞ぐ栓であって、前記雌ねじに螺合する雄ねじを備えた筒体部、前記筒体部の軸方向一端を塞ぐ板状の頭部、および前記頭部の板面を貫通する排気孔を有し、前記雄ねじと前記雌ねじを螺合させて前記蓋に装着されている栓と、
を備え、
前記蓋の前記スリーブは、前記セル室側の端面から前記上板側に延びる第一のスリットを有し、
前記栓の前記筒体部は、前記頭部の反対側の端面から前記頭部側に延びる第二のスリットを有し、
前記第一のスリットおよび前記第二のスリットが前記スリーブおよび前記筒体部の径方向に沿った側面視で重なる部分を有する液式鉛蓄電池。 a battery case including a cell chamber; a group of electrode plates housed in the cell chamber together with an electrolyte;
The lid seals the upper surface of the battery container, and has an injection port for the electrolytic solution formed at a position above the cell chamber of the upper plate, and the injection port is formed in a position above the cell chamber of the upper plate. a lid having a through-hole extending through the through-hole and a sleeve extending to the cell chamber side continuously from the through-hole, the sleeve having an internal thread;
A stopper for blocking the injection port, which includes a cylindrical body portion having a male thread that engages with the female thread, a plate-shaped head that closes one axial end of the cylindrical body, and a plug that penetrates the plate surface of the head. a plug having an exhaust hole and attached to the lid by screwing together the male thread and the female thread;
Equipped with
The sleeve of the lid has a first slit extending from the end surface on the cell chamber side to the upper plate side,
The cylindrical body portion of the stopper has a second slit extending from an end surface opposite to the head toward the head,
A liquid lead acid battery having a portion where the first slit and the second slit overlap in a side view along the radial direction of the sleeve and the cylindrical body portion. 前記第一のスリットの長さは前記第二のスリットの長さよりも長い請求項１記載の液式鉛蓄電池。 The liquid lead-acid battery according to claim 1, wherein the first slit has a longer length than the second slit. 前記第二のスリットの幅は前記第一のスリットの幅よりも狭い請求項１または２記載の液式鉛蓄電池。 The liquid lead acid battery according to claim 1 or 2, wherein the width of the second slit is narrower than the width of the first slit. 前記第一のスリットの長さは前記スリーブの長さの５／６以下である請求項１～３のいずれか一項に記載の液式鉛蓄電池。 The liquid lead-acid battery according to any one of claims 1 to 3, wherein the length of the first slit is 5/6 or less of the length of the sleeve. 前記第二のスリットの長さは前記筒体部の長さの１／２以下である請求項１～４のいずれか一項に記載の液式鉛蓄電池。 The liquid lead-acid battery according to any one of claims 1 to 4, wherein the length of the second slit is 1/2 or less of the length of the cylindrical body portion.
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JP2004103252A (en) 2002-09-04 2004-04-02 Shin Kobe Electric Mach Co Ltd Lead acid battery
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JP2015216085A (en) 2014-05-13 2015-12-03 株式会社Ｇｓユアサ Lead storage battery
JP6149976B2 (en) 2016-05-18 2017-06-21 株式会社デンソー Fuel pump and control method thereof
CN206834249U (en) 2017-06-09 2018-01-02 骆驼集团襄阳蓄电池有限公司 A kind of lead-acid accumulator vent plug
JP2018195508A (en) 2017-05-19 2018-12-06 株式会社Ｇｓユアサ Lead storage battery

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004103252A (en) 2002-09-04 2004-04-02 Shin Kobe Electric Mach Co Ltd Lead acid battery
JP2009176600A (en) 2008-01-25 2009-08-06 Gs Yuasa Corporation Vent plug for storage battery
JP2015216085A (en) 2014-05-13 2015-12-03 株式会社Ｇｓユアサ Lead storage battery
JP6149976B2 (en) 2016-05-18 2017-06-21 株式会社デンソー Fuel pump and control method thereof
JP2018195508A (en) 2017-05-19 2018-12-06 株式会社Ｇｓユアサ Lead storage battery
CN206834249U (en) 2017-06-09 2018-01-02 骆驼集团襄阳蓄电池有限公司 A kind of lead-acid accumulator vent plug

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