JP2012009244A - Lead storage battery - Google Patents

Lead storage battery Download PDF

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JP2012009244A
JP2012009244A JP2010143484A JP2010143484A JP2012009244A JP 2012009244 A JP2012009244 A JP 2012009244A JP 2010143484 A JP2010143484 A JP 2010143484A JP 2010143484 A JP2010143484 A JP 2010143484A JP 2012009244 A JP2012009244 A JP 2012009244A
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dispersion member
impact dispersion
volume
lid
battery
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Akitoshi Hiramatsu
明俊 平松
Takayuki Ota
孝之 太田
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Panasonic Corp
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Panasonic Corp
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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
    • 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
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

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  • Gas Exhaust Devices For Batteries (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a safe lead storage battery that has no effect on the surroundings even if the battery breaks due to the ignition of gas within the battery.SOLUTION: In a lead storage battery, a group of electrode plates in which a positive electrode and a negative electrode are arranged to face each other with a separator in-between is stored in each cell chamber of a battery case which is divided into a plurality of cell chambers by a partition plate and has an opening, and the opening and a lid of the battery case are joined in such manner that an impact dispersion member is arranged in the upper part of the group of electrode plates. A volume V1 of a space part constituted between the inside top face of the lid and the impact dispersion member is made smaller than a volume V2 of a space part constituted between the impact dispersion member and the group of electrode plates, and a junction between the battery case and the lid is made opposite to the side face of the impact dispersion member.

Description

本発明は鉛蓄電池に関するものである。   The present invention relates to a lead-acid battery.

自動車のセルスタータや無停電電源装置、および太陽光発電システムの蓄電部として実用化されている鉛蓄電池は、充電反応のロスとして電解液である希硫酸中の水が電気分解され、水素ガス及び酸素ガスが発生する。これらガスの発生量が少ないうちは、蓋に設けられた液口栓のガス排出口などから大気中に放出されていく。しかし満充電直後では、セパレータを介して正極と負極とを対峙させた極板群の上方の空間部分にこれらのガスが相当量滞留しているため、電池の内外部で火花等の発火源があればこれら電池内部のガスに引火し、温度上昇を伴って電池内部の圧力が上昇することで、鉛蓄電池が不定形に変形して破損する可能性がある。   Lead storage batteries that have been put to practical use as power storage units for automobile cell starters, uninterruptible power supply systems, and solar power generation systems, have electrolysis of water in dilute sulfuric acid, which is an electrolyte, as a loss of charging reaction, Oxygen gas is generated. As long as the amount of gas generated is small, the gas is released into the atmosphere from a gas outlet of a liquid stopper provided on the lid. However, immediately after full charge, a considerable amount of these gases stays in the space above the electrode plate group that faces the positive electrode and the negative electrode through the separator, so there are ignition sources such as sparks inside and outside the battery. If there is, the gas inside the battery ignites and the pressure inside the battery rises as the temperature rises, which may lead to the lead-acid battery being deformed into an irregular shape and being damaged.

満充電後の鉛蓄電池を破損に至らしめる応力は、空間部分の体積に比例すると考えられるので、特に電解液面の管理が必要な大型の鉛蓄電池で補水メンテナンスを怠った場合、上述した破損は重篤になると考えられる。   The stress that leads to damage of the lead-acid battery after full charge is considered to be proportional to the volume of the space, so the above-mentioned damage is especially true when large-scale lead-acid batteries that require electrolyte level management are neglected. It seems to be serious.

そこで空間部分の体積を実質的に減らすことで、電池内部のガスに引火した場合の破損を軽減する技術が多々示されている(例えば特許文献1、2および3)。例えば特許文献1では、隣り合う極板群どうしを接続する接続棚の上に発泡ポリエチレン製のスペーサ(好ましくは極板群上方の空間部分の体積に対し25〜50%)を設けることが示されている。また特許文献2では、極板群の上部に発泡ポリエチレンからなる消波体(好ましくは極板群上方の空間部分の体積に対し50%以上)を設けることが示されている。さらに特許文献3では、極板群の上部をポリエチレンやポリオレフィンなどの多孔性圧縮可能プラスチック製の爆発減退材で満たすことが示されている。   In view of this, many techniques have been shown to reduce damage caused by ignition of gas inside the battery by substantially reducing the volume of the space (for example, Patent Documents 1, 2, and 3). For example, Patent Document 1 shows that a spacer made of polyethylene foam (preferably 25 to 50% with respect to the volume of the space above the electrode plate group) is provided on a connection shelf that connects adjacent electrode plate groups. ing. Patent Document 2 shows that a wave-dissipating body made of foamed polyethylene (preferably 50% or more with respect to the volume of the space above the electrode group) is provided on the upper part of the electrode group. Further, Patent Document 3 shows that the upper part of the electrode plate group is filled with an explosion-reducing material made of porous compressible plastic such as polyethylene or polyolefin.

特開昭62−172661号公報Japanese Patent Laid-Open No. 62-172661 特開平05−094810号公報JP 05-094810 A 米国特許第5352545号明細書US Pat. No. 5,352,545

しかしながら特許文献1および2の構成では、電池内部のガスに引火した場合に鉛蓄電池の外装部品(蓋や電槽)が不定形に破損し、外装部品の一部が周囲に飛散するため、破損そのものが軽減できていたとしても、周囲に与える影響は依然重篤なままであった。また特許文献3の構成では、補水メンテナンスが不要な(新品の)状態では電池内部のガスに引火しても外装部品の一部が周囲に飛散することはないが、爆発減退材そのものが妨げとなって補水メンテナンスの精度が低下するため、補水メンテナンスの回数重ねた状況で電池内部のガスに引火した場合、電解液の減少によって空間部分の体積が増えているために、破損の軽減には至らなかった。   However, in the configurations of Patent Documents 1 and 2, when the gas inside the battery is ignited, the lead-acid battery exterior parts (lid and battery case) are damaged indefinitely, and some of the exterior parts are scattered around. Even if it could be mitigated, the impact on the surroundings remained severe. Further, in the configuration of Patent Document 3, in the state where replenishment maintenance is not necessary (new), even if the gas inside the battery ignites, some of the exterior parts will not scatter around, but the explosion-reducing material itself may be hindered. Therefore, if the gas inside the battery is ignited with repeated replenishment maintenance, the volume of the space increases due to the decrease in the electrolyte, which can reduce damage. There wasn't.

特に自動車のセルスタータとして使用中の鉛蓄電池でこのような課題に直面した場合、自動車のボンネット内部の機器や、ボンネットを開放した運転者などに外装部品の破片が飛散して当たることになり、影響はより重篤となる。   Especially when faced with such a problem with a lead-acid battery that is being used as a cell starter for automobiles, pieces of exterior parts will be scattered and hit the equipment inside the hood of the automobile or the driver who opened the hood, The effect is more severe.

本発明は上述した課題を解決するためのものであって、電池内部のガスに引火することで破損した場合でも、周囲に影響を及ぼさない安全な鉛蓄電池を提供することを目的とする。   An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide a safe lead-acid battery that does not affect the surroundings even when the gas inside the battery is ignited and damaged.

上述した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、中仕切り板により複数のセル室に分けられかつ開口部を有した電槽の各セル室に、セパレータを介して正極と負極とを対峙させた極板群を収納し、この極板群の上部に衝撃分散部材が配置されるようにして、電槽の開口部と蓋とを接合した鉛蓄電池であって、蓋の内側上面と衝撃分散部材との間で構成される空間部分の体積V1を衝撃分散部材と極板群との間で構成される空間部分の体積V2より小さくし、電槽と蓋との接合部を衝撃分散部材の側面と対峙させたことを特徴とする。   In order to solve the above-mentioned problem, the invention according to claim 1 of the present invention is divided into a plurality of cell chambers by a partition plate, and each cell chamber of the battery case having an opening is provided with a separator. A lead storage battery in which an electrode plate group in which a positive electrode and a negative electrode are opposed to each other is housed, and an impact dispersion member is arranged on the upper part of the electrode plate group, and an opening and a lid of the battery case are joined, The volume V1 of the space formed between the inner upper surface of the lid and the impact dispersion member is made smaller than the volume V2 of the space formed between the impact dispersion member and the electrode plate group, The joint portion is opposed to the side surface of the impact dispersion member.

本発明の請求項2に記載の発明は、請求項1に記載の発明において、体積V1を40ml以下としたことを特徴とする。   The invention described in claim 2 of the present invention is characterized in that, in the invention described in claim 1, the volume V1 is 40 ml or less.

本発明の請求項3に記載の発明は、請求項2に記載の発明において、体積V1を実質的にゼロとしたことを特徴とする。   The invention described in claim 3 of the present invention is characterized in that, in the invention described in claim 2, the volume V1 is substantially zero.

本発明の請求項4に記載の発明は、請求項1に記載の発明において、衝撃分散部材の体積V3を、体積V2より小さくかつ体積V1より大きくしたことを特徴とする。   The invention described in claim 4 of the present invention is characterized in that, in the invention described in claim 1, the volume V3 of the impact dispersion member is smaller than the volume V2 and larger than the volume V1.

本発明の請求項5に記載の発明は、請求項1に記載の発明において、各々の衝撃分散部材を中仕切り板の少なくとも1つに接触させたことを特徴とする。   According to a fifth aspect of the present invention, in the first aspect of the present invention, each impact dispersion member is brought into contact with at least one of the partition plates.

本発明の請求項6に記載の発明は、請求項1に記載の発明において、衝撃分散部材として弾性ゴム体を用いたことを特徴とする。   According to a sixth aspect of the present invention, in the first aspect of the present invention, an elastic rubber body is used as the impact dispersion member.

本発明の請求項7に記載の発明は、請求項6に記載の発明において、弾性ゴム体としてクロロプレン(CR)、エチレン−プロピレンゴム共重合体(EPM)あるいはエチレン−プロピレン−ジエンゴム三元共重合体(EPDM)を用いたことを特徴とする。   The invention according to claim 7 of the present invention is the invention according to claim 6, wherein the elastic rubber body is chloroprene (CR), ethylene-propylene rubber copolymer (EPM) or ethylene-propylene-diene rubber terpolymer. It is characterized by using coalescence (EPDM).

本発明の請求項9に記載の発明は、請求項1に記載の発明において、衝撃分散部材として単独発泡系あるいは連続発泡系のスポンジを用いたことを特徴とする。   The invention according to claim 9 of the present invention is characterized in that, in the invention according to claim 1, a single foamed or continuous foamed sponge is used as the impact dispersion member.

本発明の請求項10に記載の発明は、請求項9に記載の発明において、スポンジとしてEPM、EPDM、ポリエチレン(PE)あるいはポリプロピレン(PP)を用いたことを特徴とする。   The invention described in claim 10 of the present invention is characterized in that, in the invention described in claim 9, EPM, EPDM, polyethylene (PE) or polypropylene (PP) is used as the sponge.

発明者らが鋭意検討した結果、電池内部のガスに引火したときの応力は、着火源を中心に同心球状に伝播するため、最も早く応力が伝播する部位の負担を軽減することが効果的であることがわかった。例えば特許文献1ないし2のように、蓋の直下に比較的広い空間部分があればガス溜まりとなり、このガスに引火したときの応力が蓋や電槽の内壁に最も早く伝播することで、この部分が不定形に破損し、周囲に飛散する。そこで極板群の上部に平板状の衝撃分散部材を設けるとともに、蓋の内側上面と衝撃分散部材との間で構成される空間部分の体積V1を衝撃分散部材と極板群との間で構成される空間部分の体積V2より小さくし、衝撃分散部材と極板群との間で構成される空間部分をガス溜まりとした上でこの直上に衝撃分散部材を配置することで、蓋や電槽の内壁に伝播する応力を緩和できる。   As a result of intensive studies by the inventors, the stress when igniting the gas inside the battery propagates concentrically around the ignition source, so it is effective to reduce the burden of the part where the stress propagates the earliest I found out that For example, as in Patent Documents 1 and 2, if there is a relatively large space directly under the lid, it becomes a gas pool, and the stress when ignited by this gas propagates to the inner wall of the lid or the battery case most quickly. The part is damaged irregularly and splashes around. Therefore, a flat impact dispersion member is provided on the upper part of the electrode plate group, and the volume V1 of the space formed between the inner upper surface of the lid and the impact dispersion member is constituted between the impact dispersion member and the electrode plate group. The volume of the space portion is smaller than the volume V2, and the space portion formed between the impact dispersion member and the electrode plate group is used as a gas reservoir. The stress propagating to the inner wall can be relaxed.

併せて発明者らが鋭意検討した結果、各セル室のいずれかでガスへの引火が発生した後、炎が電槽と蓋との接合部の間隙を縫って伝播し、圧力が上昇し、破損がより重篤化することがわかった。そして電槽と蓋との接合部を衝撃分散部材の側面と対峙させることで、炎の伝播や圧力の上昇を効率的に遮断できることを解明した。   In addition, as a result of intensive studies by the inventors, after the ignition of gas in any of the cell chambers, the flame propagates by sewing through the gap between the joint between the battery case and the lid, and the pressure rises. It was found that the damage became more serious. Then, it was clarified that the propagation of the flame and the increase in pressure can be effectively blocked by making the joint between the battery case and the lid face the side of the impact dispersion member.

本発明では蓋の内側上面の直下に最小の隙間で(あるいは隙間なく)衝撃分散部材を設置しているので、電池内部のガス溜まりを衝撃分散部材の下方とすることができ、電池内部のガスに引火した際の応力を効率よく衝撃分散部材に分散させることができる。加えて電槽と蓋との接合部を衝撃分散部材の側面と対峙させることで、炎が電槽と蓋との接合部の間隙を縫って伝播することを抑制できる。その結果、鉛蓄電池の破損は蓋が内部の圧力を開放する程度に抑えられ、外装部品の破片が周囲に飛散することを防止できる。   In the present invention, since the impact dispersion member is installed with a minimum gap (or without a gap) just below the inner upper surface of the lid, the gas reservoir inside the battery can be located below the impact dispersion member, and the gas inside the battery The stress when ignited can be efficiently dispersed in the impact dispersion member. In addition, by causing the joint between the battery case and the lid to face the side surface of the impact dispersion member, it is possible to suppress the flame from being sewn through the gap between the joints between the battery case and the lid. As a result, the damage of the lead-acid battery is suppressed to such an extent that the lid releases the internal pressure, and fragments of the exterior parts can be prevented from being scattered around.

本発明の第1実施形態に係る鉛蓄電池の斜視図The perspective view of the lead acid battery which concerns on 1st Embodiment of this invention. 本発明の第1実施形態に係る鉛蓄電池の断面図Sectional drawing of the lead acid battery which concerns on 1st Embodiment of this invention. 本発明の第2実施形態に係る鉛蓄電池の断面図Sectional drawing of the lead acid battery which concerns on 2nd Embodiment of this invention. 衝撃分散部材の別の態様を示す要部断面図Cross-sectional view of relevant parts showing another aspect of the impact dispersion member

本発明の請求項1に記載の発明は、開口部を有した電槽の各セル室に、セパレータを介して正極と負極とを対峙させた極板群を収納し、この極板群の上部に衝撃分散部材が配置されるようにして、電槽の開口部と蓋とを接合した鉛蓄電池であって、蓋の内側上面と衝撃分散部材との間で構成される空間部分の体積V1を衝撃分散部材と極板群との間で構成される空間部分の体積V2より小さくし、電槽と蓋との接合部を衝撃分散部材の側面と対峙させたことを特徴とする。   According to the first aspect of the present invention, each cell chamber of a battery case having an opening accommodates an electrode plate group in which a positive electrode and a negative electrode are opposed via a separator, and an upper portion of the electrode plate group. A lead storage battery in which the opening of the battery case and the lid are joined so that the impact dispersion member is disposed on the space, and the volume V1 of the space portion formed between the inner upper surface of the lid and the impact dispersion member is It is smaller than the volume V2 of the space portion formed between the impact dispersion member and the electrode plate group, and the junction between the battery case and the lid faces the side surface of the impact dispersion member.

以下、図を用いて本発明を実施するための形態について詳述する。   Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

(第1実施形態)
図1は本発明の鉛蓄電池を長側面方向にカットして内部を示した模式的な斜視図であり、図2は本発明の鉛蓄電池(一例としてJIS D5301始動用鉛蓄電池に規定された80D26)を長側面方向にカットして内部を示した断面図である。中仕切り板1bにより複数のセル室1aに分けられかつ開口部を有した略直方体で樹脂製の電槽1の各セル室1aに、セパレータ4を介して正極2と負極3とを対峙させた極板群5と電解液6(図示せず)とが収納されている。電解液6は電槽1の液面線(過充電や過振動などによる液溢れを回避するための電解液面の上限線と、鉛部品や極板群などの腐食を回避するための電解液面の下限線とからなる)の範疇に納まるよう、定期的な補水メンテナンスにより管理される。電槽1の開口部は液口栓7を有した矩形板状で樹脂製の蓋8によって覆われ、接合されている。正極2および負極3には、それぞれ同極性の極板同士を集電するための正極ストラップ9および負極ストラップ10が接続されている。さらに隣り合うセル室の正極ストラップ9と負極ストラップ10とが接続体11と溶接され、両端のセル室の正極ストラップ9および負極ストラップ10がそれぞれ正極端子12と負極端子13との間の電気的接続を行うための極柱14(図1では、正極側の極柱のみを示している)に接続されることで、セル室の数に応じた直列構成を採っている。そして極板群5の上部には、衝撃分散部材15が配置されている。蓋8には電解液6を補液するための複数の孔(液口)が一列に設けられ、その孔は液口栓7で封口されている。また液口栓7には、電池内部から発生したガスを外部に排出するためのガス排気口(図示せず)が設けられている。なお衝撃分散部材15における液口栓7の直下に当たる部位には、補水時に電解液6が滞りなく極板群5へと落下できるための貫通孔が存在している。
(First embodiment)
FIG. 1 is a schematic perspective view showing the inside of a lead storage battery of the present invention cut in the long side direction, and FIG. 2 is a lead storage battery of the present invention (80D26 defined as a lead storage battery for starting JIS D5301 as an example). It is sectional drawing which cut | disconnected the long side surface direction and showed the inside. The positive electrode 2 and the negative electrode 3 are opposed to each cell chamber 1a of the battery case 1 made of a substantially rectangular parallelepiped resin that is divided into a plurality of cell chambers 1a by an intermediate partition plate 1b and has openings. The electrode plate group 5 and the electrolyte solution 6 (not shown) are accommodated. The electrolyte 6 is a liquid surface line of the battery case 1 (an upper limit line of the electrolyte surface for avoiding liquid overflow due to overcharge, excessive vibration, etc., and an electrolyte for avoiding corrosion of lead parts, electrode plates, etc. It is managed by regular replenishment maintenance so that it falls within the category of The opening of the battery case 1 is a rectangular plate having a liquid spout 7 and is covered and joined by a resin lid 8. Connected to the positive electrode 2 and the negative electrode 3 are a positive electrode strap 9 and a negative electrode strap 10 for collecting electrode plates of the same polarity. Further, the positive electrode strap 9 and the negative electrode strap 10 in the adjacent cell chamber are welded to the connection body 11, and the positive electrode strap 9 and the negative electrode strap 10 in the cell chambers at both ends are electrically connected between the positive electrode terminal 12 and the negative electrode terminal 13, respectively. Are connected to a pole column 14 (only the pole column on the positive electrode side is shown in FIG. 1), thereby adopting a series configuration corresponding to the number of cell chambers. An impact dispersion member 15 is disposed on the upper part of the electrode plate group 5. The lid 8 is provided with a plurality of holes (liquid ports) for replenishing the electrolytic solution 6 in a row, and the holes are sealed with a liquid plug 7. In addition, the liquid port plug 7 is provided with a gas exhaust port (not shown) for discharging gas generated from the inside of the battery to the outside. Note that a portion of the impact dispersion member 15 that is directly below the liquid spout 7 has a through hole through which the electrolytic solution 6 can drop into the electrode plate group 5 without stagnation during rehydration.

本発明の請求項1に記載の発明は、蓋8の内側上面と衝撃分散部材15との間で構成される空間部分の体積V1を、衝撃分散部材15と極板群5との間で構成される空間部分の体積V2より小さくし、かつ電槽1と蓋8との接合部を衝撃分散部材15の側面と対峙させたことを特徴とする。   According to the first aspect of the present invention, the volume V1 of the space portion formed between the inner upper surface of the lid 8 and the impact dispersion member 15 is configured between the impact dispersion member 15 and the electrode plate group 5. It is characterized in that it is made smaller than the volume V2 of the space portion to be formed, and the joint portion between the battery case 1 and the lid 8 is opposed to the side surface of the impact dispersion member 15.

なお本発明の請求項2に記載の発明は、請求項1に記載の発明において、体積V1を40ml以下としたことを特徴とする。体積V1を40ml以下とすることで、鉛蓄電池のサイズにかかわらず、電池内部のガス溜まりを確実に衝撃分散部材15の下部とすることができる。   The invention described in claim 2 of the present invention is characterized in that, in the invention described in claim 1, the volume V1 is 40 ml or less. By setting the volume V1 to 40 ml or less, regardless of the size of the lead storage battery, the gas reservoir inside the battery can be surely placed below the impact dispersion member 15.

本発明の請求項3に記載の発明は、請求項2に記載の発明において、体積V1を実質的にゼロとしたことを特徴とする。本発明で言うところの「体積V1を実質的にゼロとした」とは、図1および2のように接着や熱溶着などで衝撃分散部材15の上面全てを蓋8の内側上面に密接させた状態を指す。この形態は、請求項2に記載の発明における最良の形態である。   The invention described in claim 3 of the present invention is characterized in that, in the invention described in claim 2, the volume V1 is substantially zero. According to the present invention, “the volume V1 is substantially zero” means that the entire upper surface of the impact dispersion member 15 is brought into close contact with the inner upper surface of the lid 8 by adhesion or heat welding as shown in FIGS. Refers to the state. This form is the best form in the invention described in claim 2.

本発明の請求項4に記載の発明は、請求項1に記載の発明において、衝撃分散部材15の体積V3を、体積V2より小さくかつ体積V1より大きくしたことを特徴とする。体積V3を体積V2より小さくかつ体積V1より大きくすることで、衝撃吸収の効果を維持しつつ、急速充電を伴う補充電などにおいて電解液が押し上げられて液面が上昇した際にも、電池の内部から電解液が横溢することを防げる。   The invention described in claim 4 of the present invention is characterized in that, in the invention described in claim 1, the volume V3 of the impact dispersion member 15 is smaller than the volume V2 and larger than the volume V1. By making the volume V3 smaller than the volume V2 and larger than the volume V1, while maintaining the impact absorption effect, even when the electrolyte level is pushed up in the auxiliary charge accompanying rapid charging and the liquid level rises, It prevents the electrolyte from overflowing from the inside.

本発明の請求項5に記載の発明は、請求項1に記載の発明において、各々の衝撃分散部材15を中仕切り板1bの少なくとも1つに接触させたことを特徴とする。電槽1と蓋8との接合部を衝撃分散部材15の側面と単に対峙させるだけでなく、衝撃分散部材15を中仕切り板1bの少なくとも1つに接触させることで、炎が電槽1と蓋8との接合部の間隙を縫って伝播し、圧力が上昇しやすくなることを抑制できる。但し衝撃分散部材15を中仕切り板1bの少なくとも1つに接触させる場合は電槽1と蓋8との接合に際して衝撃分散部材15が破損しないよう、接着に慎重を要することになる。   The invention according to claim 5 of the present invention is characterized in that, in the invention according to claim 1, each impact dispersion member 15 is brought into contact with at least one of the partition plates 1b. Not only is the joint between the battery case 1 and the lid 8 opposed to the side surface of the impact dispersion member 15, but the flame is caused to contact the battery case 1 by bringing the impact dispersion member 15 into contact with at least one of the partition plates 1 b. It is possible to suppress the pressure from being easily increased by sewing and propagating the gap at the joint portion with the lid 8. However, when the impact dispersion member 15 is brought into contact with at least one of the partition plates 1b, careful bonding is required so that the impact dispersion member 15 is not damaged when the battery case 1 and the lid 8 are joined.

本発明の請求項6に記載の発明は、請求項1に記載の発明において、衝撃分散部材15として弾性ゴム体を用いたことを特徴とする。弾性ゴム体が衝撃分散部材15であれば、着火源を中心に同心球状に伝播する応力は、衝撃分散部材15の弾力によってより分散が進められ、蓋8へのダメージが和らげられる。   According to a sixth aspect of the present invention, in the first aspect of the present invention, an elastic rubber body is used as the impact dispersion member 15. If the elastic rubber body is the impact dispersion member 15, the stress propagating concentrically around the ignition source is further dispersed by the elasticity of the impact dispersion member 15, and the damage to the lid 8 is reduced.

本発明の請求項7に記載の発明は、請求項6に記載の発明において、弾性ゴム体としてCR、EPMあるいはEPDMを用いたことを特徴とする。耐酸性に優れたこれらの材料で構成された衝撃分散部材15は電解液(硫酸)への耐性が高いので、請求項6に記載の発明における最良の形態となり得る。   The invention described in claim 7 of the present invention is characterized in that, in the invention described in claim 6, CR, EPM or EPDM is used as the elastic rubber body. Since the impact dispersion member 15 composed of these materials having excellent acid resistance has high resistance to the electrolytic solution (sulfuric acid), it can be the best mode in the invention described in claim 6.

本発明の請求項8に記載の発明は、請求項1に記載の発明において、衝撃分散部材15として単独発泡系あるいは連続発泡系のスポンジを用いたことを特徴とする。スポンジが衝撃分散部材15であれば、着火源を中心に同心球状に伝播する応力は、衝撃分散部材15の空洞への吸収によってより分散が進められ、蓋8へのダメージが和らげられる。   The invention according to claim 8 of the present invention is characterized in that, in the invention according to claim 1, a single foamed or continuous foamed sponge is used as the impact dispersion member 15. If the sponge is the impact dispersion member 15, the stress that propagates concentrically around the ignition source is further dispersed by absorption into the cavity of the impact dispersion member 15, and damage to the lid 8 is reduced.

本発明の請求項10に記載の発明は、請求項9に記載の発明において、スポンジとしてEPM、EPDM、PEあるいはPPを用いたことを特徴とする。耐酸性に優れたこれらの材料で構成された衝撃分散部材15は電解液(硫酸)への耐性が高いので、請求項8に記載の発明における最良の形態となり得る。   The invention described in claim 10 of the present invention is characterized in that, in the invention described in claim 9, EPM, EPDM, PE or PP is used as the sponge. Since the impact dispersion member 15 made of these materials having excellent acid resistance has high resistance to the electrolytic solution (sulfuric acid), it can be the best mode in the invention of claim 8.

電槽1や蓋8にはPPなどを材料として用いることができる。またここでは衝撃分散部材15における液口栓7の直下に当たる部位に貫通孔がある場合を示したが、この貫通孔がない場合でも、衝撃分散部材15と極板群5との間で構成される空間部分が十分に確保できているため、特許文献3のようにこの空間部分がない構成に比べて、遥かに補水メンテナンスの精度は高くなる。   PP or the like can be used as the material for the battery case 1 or the lid 8. Further, here, a case where a through hole is provided in a portion of the impact dispersion member 15 that is directly below the liquid spigot 7 is shown, but even when there is no through hole, the impact dispersion member 15 is configured between the impact dispersion member 15 and the electrode plate group 5. Therefore, the accuracy of the water replenishment maintenance is much higher than that of the configuration having no space portion as in Patent Document 3.

(第2実施形態)
図3は別の形態の本発明の鉛蓄電池を長側面方向に切断カットさせて内部を示した断面図である。図1および2との相違点は、衝撃分散部材15を蓋8の内側上面に密接させなかったこと(但し体積V3は体積V2より小さくかつ体積V1より大きい)である。この形態であっても、本発明の効果が十分に得られることは言うまでもない。
(Second Embodiment)
FIG. 3 is a cross-sectional view showing the inside of another embodiment of the lead storage battery of the present invention cut and cut in the long side direction. The difference from FIGS. 1 and 2 is that the impact dispersion member 15 is not brought into close contact with the inner upper surface of the lid 8 (however, the volume V3 is smaller than the volume V2 and larger than the volume V1). Needless to say, even in this form, the effects of the present invention can be sufficiently obtained.

第1実施形態に示す電池内部構成と同等構成の電池を製作した。まずPP製の電槽1の各セル室1aに、正極ストラップ9、負極ストラップ10、鉛合金製の極柱14および接続体11などを備えた極板群5を挿入した。次いで上部方向に向かって凸形状のテーパ構造を有する鉛合金製の正極端子12と負極端子13とを備えた蓋8の内側上面に、種々の材質からなる厚さ5mmまたは10.0mmの衝撃分散部材15(体積V3は30mlまたは60ml)を物理構造的かしめによって当接させた。そして熱板に当てて部分的に溶融させた蓋8と電槽1の開口部とを15秒/個のタクトで溶着させ、電槽1と蓋8との接合部を衝撃分散部材15の側面と対峙させた。ここで衝撃分散部材15と中仕切り板1bとの隙間が1.0〜2.0mm程度あるように構成した。なお衝撃分散部材15と極板群5との間で構成される空間部分の体積V2は190〜223mlとなる。最後に正極端子12と負極端子13とをそれぞれ極柱14と溶接接続し、希硫酸からなる電解液6を各セル室1aに注入することで、JIS D5301始動用鉛蓄電池に規定された80D26(防爆のために液口栓7の内部に多孔質フィルタを配置)である電池A1〜22を作製した。   A battery having the same configuration as the battery internal configuration shown in the first embodiment was manufactured. First, the electrode plate group 5 provided with the positive electrode strap 9, the negative electrode strap 10, the lead pole 14 made of lead alloy, the connection body 11, and the like was inserted into each cell chamber 1a of the battery case 1 made of PP. Next, an impact dispersion having a thickness of 5 mm or 10.0 mm made of various materials is formed on the inner upper surface of the lid 8 having the positive electrode terminal 12 and the negative electrode terminal 13 made of lead alloy having a tapered structure projecting upward. The member 15 (volume V3 is 30 ml or 60 ml) was brought into contact by physical structural caulking. Then, the lid 8 that is partially melted by applying to the hot plate and the opening of the battery case 1 are welded at a tact of 15 seconds / piece, and the joint between the battery case 1 and the lid 8 is connected to the side surface of the impact dispersion member 15. And confronted. Here, the gap between the impact dispersion member 15 and the partition plate 1b is configured to be about 1.0 to 2.0 mm. The volume V2 of the space formed between the impact dispersion member 15 and the electrode plate group 5 is 190 to 223 ml. Finally, the positive electrode terminal 12 and the negative electrode terminal 13 are respectively connected to the pole column 14 by welding, and an electrolytic solution 6 made of dilute sulfuric acid is injected into each cell chamber 1a, whereby 80D26 (80D26 (specified in JIS D5301 lead acid battery for starting) Batteries A1 to A22 having a porous filter disposed inside the liquid spout 7 for explosion protection were produced.

次にA11〜12と同一仕様の電池に対して、電槽1の中仕切り板1bと接する衝撃分散部材15(厚さ5mmまたは10mm、体積V3は34mlまたは68ml)を用い、蓋8と電槽1の開口部とを溶着するタクトを25秒/個として電池A23〜24を構成した。   Next, for the battery having the same specifications as A11-12, the impact dispersion member 15 (thickness 5 mm or 10 mm, volume V3 is 34 ml or 68 ml) in contact with the partition plate 1b of the battery case 1 is used. Batteries A23 to 24 were constructed with a tact time for welding 1 opening portion of 25 seconds / piece.

またA12と同一仕様の電池に対して、衝撃分散部材15の厚さを21mm(体積V3は126ml、V2は124mm)として電池A25を構成した。   Further, for the battery having the same specifications as A12, the thickness of the impact dispersion member 15 is 21 mm (volume V3 is 126 ml, V2 is 124 mm), and the battery A25 is configured.

続いてA12と同一仕様の電池に対して、図4のように、平坦部15aと、この平坦部15aの四周を囲むように上方に突出させた突出部15bとからなる衝撃分散部材15を用いた。ここで突出部15bの突出高さを変えつつ蓋8の内側上面にこの突出部15bを物理構造的かしめによって当接させることで、蓋8の内側上面と衝撃分散部材15(平坦部15aの上面および突出部15bの内側面)との間で構成される空間部分の体積V1をそれぞれ20ml、40ml、60ml、80ml、100mlおよび120mlとした。これに伴って衝撃分散部材15の空間体積V3(平坦部15aと突出部15bの体積の総和)はそれぞれ34ml、38ml、42ml、46ml、50mlおよび54mlとなり、衝撃分散部材15と極板群5との間で構成される空間部分の体積V2はそれぞれ196ml、172ml、148ml、124ml、100mlおよび76mlとなる。これらを電池B1〜B6とする。   Subsequently, for a battery having the same specifications as A12, as shown in FIG. 4, an impact dispersion member 15 comprising a flat portion 15a and protruding portions 15b protruding upward so as to surround the four circumferences of the flat portion 15a is used. It was. Here, the protrusion 15b is brought into contact with the inner upper surface of the lid 8 by physical structural caulking while changing the protrusion height of the protrusion 15b, whereby the inner upper surface of the lid 8 and the impact dispersion member 15 (the upper surface of the flat portion 15a) are contacted. And the volume V1 of the space portion formed between the inner surface of the protrusion 15b and the inner surface of the protrusion 15b was 20 ml, 40 ml, 60 ml, 80 ml, 100 ml, and 120 ml, respectively. As a result, the space volume V3 of the impact dispersion member 15 (the sum of the volumes of the flat portion 15a and the protrusion 15b) is 34 ml, 38 ml, 42 ml, 46 ml, 50 ml and 54 ml, respectively. The volume V2 of the space portion formed between 196 ml, 172 ml, 148 ml, 124 ml, 100 ml, and 76 ml, respectively. These are designated as batteries B1 to B6.

さらにA12と同一仕様の電池に対して、衝撃分散部材15の高さを3.3mm、体積V3は20mlにして電槽1と蓋8との接合部を衝撃分散部材15の側面と対峙させないようにして電池Cを構成した。   Furthermore, for a battery having the same specifications as A12, the height of the impact dispersion member 15 is 3.3 mm and the volume V3 is 20 ml so that the joint between the battery case 1 and the lid 8 does not face the side surface of the impact dispersion member 15. Thus, a battery C was constructed.

最後にA12と同一仕様の電池に対して、衝撃分散部材15を取り外して従来品の電池Dを構成した。   Finally, the impact dispersion member 15 was removed from the battery having the same specification as that of A12 to form a conventional battery D.

以上の電池を各20個準備し、電解液面の高さが液面線の下限から更に10mm下になるようにした上で満充電状態から6A×1時間(電池内部の空気が発生したガスと完全に入れ替わる計算的理論値)以上の充電を行い、温度25℃・湿度50RH%の環境下で、30kV(人体に帯電する静電気は約10kVなので非常に高い数値)の静電気を印加した。なお静電気は、最も端に位置するセル室1aの液口栓7のガス排気口から上側5mmの場所に静電気発生装置を設置して気中放電するという、放電火花が電池内部に入りやすい条件で印加した。また各々の電池は静電気印加中も6Aで充電を継続することで、水素ガスおよび酸素ガスが連続的に発生して滞留しやすい(印加による破損が起こりやすい)条件とした。そして一部の電池については、実車試験(約1年間、普通乗用車にて10000〜15000km走行)を行った後で、上述した評価を行った。実車試験品は試験中に振動や熱など各種の負荷が掛かり、蓋8、電槽1およびその溶着部などが劣化しやすくなるため、よりシビアな評価となる。以上の電池の構成条件および評価結果を(表1)に示す。   Prepare 20 batteries as described above, and make the electrolyte surface level 10 mm below the lower limit of the liquid surface line, and then 6A × 1 hour from the fully charged state (gas generated by the air inside the battery) (Computational theoretical value that completely replaces the above) The above charging was performed, and static electricity of 30 kV was applied in an environment of a temperature of 25 ° C. and a humidity of 50 RH% (the static electricity charged to the human body is about 10 kV). Static electricity can be easily discharged into the battery by installing a static electricity generator at a location 5 mm above the gas outlet of the liquid port plug 7 of the cell chamber 1a located at the end and discharging in the air. Applied. Each battery was continuously charged at 6 A even during application of static electricity, so that hydrogen gas and oxygen gas were continuously generated and stagnate (breakage due to application was likely to occur). For some of the batteries, the above-described evaluation was performed after an actual vehicle test (running for 10,000 to 15000 km in a normal passenger car for about one year). The actual vehicle test product is subjected to various loads such as vibration and heat during the test, and the lid 8, the battery case 1, and the welded portion thereof are likely to be deteriorated. The configuration conditions and evaluation results of the above batteries are shown in (Table 1).

Figure 2012009244
Figure 2012009244

(表1)から明らかなように、引火が発生した電池のうち、蓋の内側上面と衝撃分散部材との間で構成される空間部分の体積V1が実質的にゼロであるA1〜25と、このV1が40ml以下であるB1およびB2では、初期状態のみならず実車試験後であっても、蓋8のみが破片が飛散することなく破損する結果となった。また体積V1が40mlを超えるB3〜5については、特に実車試験後において、蓋8および電槽1の破片が飛散する形で破損するものの、その発生率は体積V1が体積V2以上である電池B5〜6や、電槽1と蓋8との接合部を衝撃分散部材15の側面と対峙させないようにした電池Cや、衝撃分散部材15を有さない電池Dに比べて低い傾向にあった。なお電槽1が破損した各電池からは、電解液である希硫酸が外部に漏れていた。   As is clear from (Table 1), among the batteries that have ignited, A1 to 25 in which the volume V1 of the space portion formed between the inner upper surface of the lid and the impact dispersion member is substantially zero; In B1 and B2 in which V1 is 40 ml or less, not only in the initial state but also after the actual vehicle test, only the lid 8 was damaged without scattering of fragments. B3-5 having a volume V1 exceeding 40 ml, particularly after an actual vehicle test, is broken in such a manner that the pieces of the lid 8 and the battery case 1 are scattered, but the rate of occurrence thereof is a battery B5 having a volume V1 equal to or higher than the volume V2. -6, battery C in which the joint between battery case 1 and lid 8 is not opposed to the side surface of impact dispersion member 15, and battery D without impact dispersion member 15 tended to be lower. In addition, from each battery in which the battery case 1 was damaged, dilute sulfuric acid as an electrolyte leaked to the outside.

電池内部のガスが引火した際の応力は着火点から同心球状に伝播するが、この着火点の真上に衝撃分散部材15を有さない電池B6(体積V1が体積V2以上なので、蓋8の内側上面と衝撃分散部材15との間で着火してしまう)や電池Dは、この同心球状の応力が直接に蓋8に伝播するため、蓋8や電槽1の上部が破片の飛散を伴って破損してしまう。しかし電池A1〜25、電池B1〜4および電池Cでは着火点の真上に衝撃分散部材15が存在するため、蓋8や電槽1の上部は破損するものの、破片の飛散を伴いにくくなることがわかる。   The stress when the gas inside the battery ignites propagates concentrically from the ignition point, but the battery B6 does not have the impact dispersion member 15 directly above the ignition point (since the volume V1 is greater than or equal to the volume V2, the inner upper surface of the lid 8 And the battery D, the concentric spherical stress directly propagates to the lid 8, and the upper part of the lid 8 and the battery case 1 is damaged due to scattering of fragments. Resulting in. However, in the batteries A1 to 25, the batteries B1 to 4 and the battery C, the impact dispersion member 15 is present immediately above the ignition point. Therefore, although the lid 8 and the upper part of the battery case 1 are damaged, it is difficult to cause fragments to be scattered. Recognize.

但し電池Cの場合、電槽1と蓋8との接合部が衝撃分散部材15の側面と対峙していないため、炎が電槽1と蓋8との接合部の間隙を縫って各セル室間を伝播し、破損がより重篤化している。したがって電池内部のガスに引火した場合に十分な安全性を確保するためには、極板群5の上部に衝撃分散部材15を配置するとともに、体積V1を体積V2より小さくし、かつ電槽1と蓋8との接合部を衝撃分散部材15の側面と対峙させる必要があることがわかる。   However, in the case of the battery C, since the joint portion between the battery case 1 and the lid 8 does not face the side surface of the impact dispersion member 15, the flame sews the gap between the joint portion between the battery case 1 and the lid 8 and each cell chamber. The damage is more serious. Therefore, in order to ensure sufficient safety when the gas inside the battery is ignited, the impact dispersion member 15 is arranged on the upper part of the electrode plate group 5, the volume V1 is made smaller than the volume V2, and the battery case 1 is placed. It can be seen that the joint between the lid 8 and the lid 8 needs to face the side surface of the impact dispersion member 15.

なお電槽1と蓋8との接合部を衝撃分散部材15の側面と対峙させた電池A11〜22と、さらに電槽1の中仕切り板1bと衝撃分散部材15とを接するようにした電池A23〜24のそれぞれについて、(表1)に示す静電気を一度印可した後でさらに充電を続け、静電気(30kV)を再度印可した。その結果、電池A1〜22は破片の飛散こそなかったものの蓋8が顕著に破損したが、電池A23〜24の蓋8は軽微な破損のままであった。電池A23〜24の蓋8は、さらに充電を続けながらもう一度(再々度)静電気を印可してはじめて、電池A1〜22と同様の破損状態となった。このように電池A23〜24が電池A1〜22に比べて破損が軽微であったのは、電槽1と蓋8との接合部を衝撃分散部材15の側面と単に対峙させるだけでなく、衝撃分散部材15を中仕切り板1bに接触させることで、炎が電槽1と蓋8との接合部の間隙を縫って伝播する速度(圧力が上昇する速度)が低下したことによるものと考えられる。このように衝撃分散部材15を中仕切り板1bに接触させることで、電槽1と蓋8との接合に際して衝撃分散部材15が破損しないように接着に慎重を要する必要はあるものの、安全性が向上できることがわかる。   It should be noted that batteries A11 to A22 in which the junction between the battery case 1 and the lid 8 is opposed to the side surface of the impact dispersion member 15, and a battery A23 in which the partition plate 1b of the battery case 1 and the impact dispersion member 15 are in contact with each other. About each of -24, after applying static electricity shown in (Table 1) once, charging was further continued, and static electricity (30 kV) was applied again. As a result, although the batteries A1 to 22 had no broken pieces, the lid 8 was remarkably damaged, but the lids 8 of the batteries A23 to A24 remained slightly damaged. The lids 8 of the batteries A23 to 24 were in the same damaged state as the batteries A1 to 22 only after applying static electricity once again (again) while continuing to charge. As described above, the batteries A23 to 24 were less damaged than the batteries A1 to 22 in that the joint portion between the battery case 1 and the lid 8 was not only opposed to the side surface of the impact dispersion member 15, but also the impact. It is considered that the speed at which the flame propagates by sewing the gap between the battery case 1 and the lid 8 (the speed at which the pressure rises) is reduced by bringing the dispersion member 15 into contact with the partition plate 1b. . By bringing the impact dispersion member 15 into contact with the partition plate 1b in this way, it is necessary to be careful in bonding so that the impact dispersion member 15 is not damaged when the battery case 1 and the lid 8 are joined. It can be seen that it can be improved.

またV3がV2とほぼ同等の電池A25は上述した破壊試験において電池A〜24と遜色ない結果を示したが、満充電状態を超えて充電を続けた結果、液口栓7に設けたガス排気口から外部へ電解液6が横溢する結果となった。   Further, the battery A25 in which V3 is substantially equal to V2 showed results inferior to the batteries A to 24 in the destructive test described above, but as a result of continuing charging beyond the fully charged state, the gas exhaust provided in the liquid stopper 7 As a result, the electrolyte 6 overflowed from the mouth to the outside.

なお補水を必須とする液式鉛蓄電池の場合、電槽1および/あるいは蓋8を衝撃分散部材15と接触させないことで、電槽1の液面線が識別し易くなってメンテナンス性が向上する。一方で補水を必要としない制御弁式鉛蓄電池の場合、液面線が存在しないので、安全性を重視して電槽1および/蓋8を衝撃分散部材15と接触させることがより好ましい。   In the case of a liquid lead-acid battery that requires replenishment, by keeping the battery case 1 and / or the lid 8 from contacting the impact dispersion member 15, the liquid level line of the battery case 1 can be easily identified and the maintainability is improved. . On the other hand, in the case of a control valve type lead storage battery that does not require replenishment, since there is no liquid level line, it is more preferable to place the battery case 1 and the lid 8 in contact with the impact dispersion member 15 with emphasis on safety.

また衝撃分散部材15として用いた弾性ゴム体や各種スポンジの硬度による効果の違いは見られなかったので、これらのカテゴリーから材料を自由に選択できることは言うまでもなく、電池の大きさや形状との相性を考え、衝撃分散部材15の生産や取扱いのし易さを考慮し、適宜選択することがより好ましい。   In addition, since there was no difference in the effect due to the hardness of the elastic rubber body and various sponges used as the impact dispersion member 15, it is needless to say that materials can be freely selected from these categories, and the compatibility with the size and shape of the battery. In consideration, it is more preferable to select appropriately in consideration of the production and handling of the impact dispersion member 15.

本発明の構成によれば、より高い安全性と信頼性とを有する鉛蓄電池を提供することができるので、工業上、極めて有効である。   According to the configuration of the present invention, a lead storage battery having higher safety and reliability can be provided, which is extremely effective industrially.

1 電槽
1a セル室
1b 中仕切り板
2 正極
3 負極
4 セパレータ
5 極板群
6 電解液(図示せず)
7 液口栓
8 蓋
9 正極ストラップ
10 負極ストラップ
11 接続体
12 正極端子
13 負極端子
14 極柱
15 衝撃分散部材
15a 平坦部
15b 突出部
DESCRIPTION OF SYMBOLS 1 Battery case 1a Cell chamber 1b Partition plate 2 Positive electrode 3 Negative electrode 4 Separator 5 Electrode plate group 6 Electrolyte (not shown)
7 Liquid Mouth Plug 8 Lid 9 Positive Strap 10 Negative Strap 11 Connection 12 Positive Terminal 13 Negative Terminal 14 Polar Column 15 Impact Dispersing Member 15a Flat Part 15b Projecting Part

Claims (9)

中仕切り板により複数のセル室に分けられかつ開口部を有する電槽の各セル室に、セパレータを介して正極と負極とを対峙させた極板群を収納し、この極板群の上部に衝撃分散部材が配置されるようにして、電槽の開口部と蓋とを接合した鉛蓄電池であって、
前記蓋の内側上面と前記衝撃分散部材との間で構成される空間部分の体積V1を、前記衝撃分散部材と前記極板群との間で構成される空間部分の体積V2より小さくし、
前記電槽と前記蓋との接合部を、前記衝撃分散部材の側面と対峙させたことを特徴とする鉛蓄電池。
Each cell chamber of the battery case that is divided into a plurality of cell chambers by the partition plate and has an opening accommodates an electrode plate group in which the positive electrode and the negative electrode are opposed to each other via a separator, and is placed above the electrode plate group. A lead-acid battery in which the opening and lid of the battery case are joined so that the impact dispersion member is disposed,
The volume V1 of the space portion formed between the inner upper surface of the lid and the impact dispersion member is made smaller than the volume V2 of the space portion formed between the impact dispersion member and the electrode plate group,
A lead-acid battery, wherein a joint portion between the battery case and the lid is opposed to a side surface of the impact dispersion member.
前記体積V1を40ml以下としたことを特徴とする、請求項1記載の鉛蓄電池。   The lead storage battery according to claim 1, wherein the volume V1 is 40 ml or less. 前記体積V1を実質的にゼロとしたことを特徴とする、請求項2記載の鉛蓄電池。   3. The lead acid battery according to claim 2, wherein the volume V1 is substantially zero. 前記衝撃分散部材の体積V3を、前記体積V2より小さく、かつ前記体積V1より大きくしたことを特徴とする、請求項1記載の鉛蓄電池。   The lead acid battery according to claim 1, wherein a volume V3 of the impact dispersion member is smaller than the volume V2 and larger than the volume V1. 各々の前記衝撃分散部材を前記中仕切り板の少なくとも1つに接触させたことを特徴とする、請求項1記載の鉛蓄電池。   The lead-acid battery according to claim 1, wherein each of the impact dispersion members is in contact with at least one of the partition plates. 前記衝撃分散部材として弾性ゴム体を用いたことを特徴とする、請求項1記載の鉛蓄電池。   The lead acid battery according to claim 1, wherein an elastic rubber body is used as the impact dispersion member. 前記弾性ゴム体としてクロロプレン、エチレン−プロピレンゴム共重合体あるいはエチレン−プロピレン−ジエンゴム三元共重合体を用いたことを特徴とする、請求項6記載の鉛蓄電池。   The lead acid battery according to claim 6, wherein chloroprene, ethylene-propylene rubber copolymer or ethylene-propylene-diene rubber terpolymer is used as the elastic rubber body. 前記衝撃分散部材として単独発泡系あるいは連続発泡系のスポンジを用いたことを特徴とする、請求項1記載の鉛蓄電池。   2. The lead acid battery according to claim 1, wherein a single foamed or continuous foamed sponge is used as the impact dispersion member. 前記スポンジとしてエチレン−プロピレンゴム共重合体、エチレン−プロピレン−ジエンゴム三元共重合体、ポリエチレンあるいはポリプロピレンを用いたことを特徴とする、請求項9記載の鉛蓄電池。   The lead acid battery according to claim 9, wherein an ethylene-propylene rubber copolymer, an ethylene-propylene-diene rubber terpolymer, polyethylene or polypropylene is used as the sponge.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9608245B2 (en) 2014-09-30 2017-03-28 Johnson Controls Technology Company System for providing structural integrity of a battery module
JP2018013531A (en) * 2016-07-19 2018-01-25 パナソニックIpマネジメント株式会社 Explosion proof camera

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9608245B2 (en) 2014-09-30 2017-03-28 Johnson Controls Technology Company System for providing structural integrity of a battery module
US10361411B2 (en) 2014-09-30 2019-07-23 Cps Technology Holdings Llc System for providing structural integrity of a battery module
JP2018013531A (en) * 2016-07-19 2018-01-25 パナソニックIpマネジメント株式会社 Explosion proof camera

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