WO2019244369A1 - Lead storage battery and rust preventive method for terminal of lead storage battery - Google Patents

Lead storage battery and rust preventive method for terminal of lead storage battery Download PDF

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Publication number
WO2019244369A1
WO2019244369A1 PCT/JP2018/041850 JP2018041850W WO2019244369A1 WO 2019244369 A1 WO2019244369 A1 WO 2019244369A1 JP 2018041850 W JP2018041850 W JP 2018041850W WO 2019244369 A1 WO2019244369 A1 WO 2019244369A1
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Prior art keywords
terminal
rosin
battery
lead
storage battery
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PCT/JP2018/041850
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French (fr)
Japanese (ja)
Inventor
矢吹　修一
中野　憲二
寿夫 渡邉
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古河電池株式会社
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Publication of WO2019244369A1 publication Critical patent/WO2019244369A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/562—Terminals characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
    • 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

Definitions

  • the present invention relates to a lead storage battery and a method for preventing rust of a terminal of the lead storage battery.
  • a lead storage battery including a battery case, and a positive electrode terminal and a negative electrode terminal exposed outside the battery case is known.
  • This type of terminal is formed of a metal material such as a lead alloy and has a shape according to specifications.
  • each terminal is a box-shaped terminal (for example, see Patent Document 1).
  • an object of the present invention is to prevent oxidation of each terminal even in a high-temperature and high-humidity environment, and to prevent discoloration due to a chemical reaction between a material used for rust prevention and each terminal.
  • a flux agent organic rosin
  • a flux agent is applied to at least a part of the surface of the copper or copper alloy core to suppress a decrease in adhesion between the core and the lead alloy constituting the main body of the pole body.
  • a lead-acid battery having a pole structure with low electric resistance (see Japanese Patent No. 4876323) has been proposed, but the purpose, configuration, and effects are completely different from those of the present invention. That is, the present invention is not simply a diversion of a known technique, but is based on a novel finding.
  • the present invention provides a lead storage battery including a battery body and a positive electrode terminal and a negative electrode terminal exposed outside the battery body, wherein each terminal including the positive electrode terminal and the negative electrode terminal is covered with rosin. It is characterized by rust prevention.
  • the terminal may be provided with a connection portion joined to an electrode plate arranged in the battery main body, and the entire terminal including the connection portion may be covered with rosin.
  • the terminal may be a box-shaped terminal having a portion exposed to the outside of the battery body and having a hollow box shape.
  • the present invention provides a method for preventing rust of a lead-acid battery including a battery body and a positive electrode terminal and a negative electrode terminal exposed outside the battery body, wherein the rust preventive agent for each terminal including the positive electrode terminal and the negative electrode terminal includes: It is characterized by using rosin.
  • the terminal is provided with a connection portion joined to an electrode plate arranged in the battery main body, and each terminal and the battery main body are integrated by insert molding, and the connection is performed.
  • each terminal Before joining the portion to the electrode plate and before the insert molding, each terminal may be entirely covered with rosin.
  • each terminal may be covered with a rosin by a step of dipping each terminal in a liquid containing rosin and drying.
  • oxidation of each terminal can be prevented even in a high-temperature and high-humidity environment, and discoloration due to a chemical reaction between a material used for rust prevention and each terminal can be prevented.
  • FIG. 1 is a perspective view of a lead storage battery according to an embodiment of the present invention.
  • FIG. 2 is a diagram showing the terminals together with the peripheral configuration.
  • FIG. 3 is a diagram showing an example of the manufacturing process.
  • FIG. 1 is a perspective view of a lead storage battery according to an embodiment of the present invention.
  • the lead storage battery 1 includes a rectangular parallelepiped battery body 2 and a plurality of terminals 3 exposed outside the battery body 2.
  • the battery main body 2 includes a box-shaped battery case 2A in which the inside is partitioned into a plurality of chambers and a plurality of electrode plates are arranged in each room, and a lid 2B that covers an upper opening of the battery case 2A.
  • the battery case 2A and the lid 2B are formed of a resin material such as polypropylene (PP).
  • the plurality of terminals 3 include a positive terminal and a negative terminal.
  • the positive terminal and the negative terminal are formed of the same component.
  • the positive electrode terminal and the negative electrode terminal may be partially different in shape and the like.
  • the lead storage battery 1 is a lead storage battery for a motorcycle, and the terminal 3 is formed as a hollow box-shaped box-shaped terminal.
  • this lead storage battery does not have to be used for motorcycles and may be a battery used for various purposes. Further, the shape of the terminal 3 may be appropriately changed according to the specification.
  • FIG. 2 is a diagram showing the terminal 3 together with the peripheral configuration.
  • the terminal 3 is provided integrally with a connecting portion 4 joined to a plurality of polar plates having the same polarity, and is also referred to as a bushing terminal.
  • the connecting portion 4 has a pole 5 extending from the terminal 3 and a strap 6 joined to the pole 5 on the side opposite to the terminal 3.
  • the terminal 3, the pole 5, and the strap 6 are integrally formed by casting using a metal material such as a lead alloy.
  • a plurality of flanges 5A projecting around the pole 5 are provided at locations corresponding to the poles 5, and a lid 2B is integrated by insert molding into a region corresponding to the flanges 5A.
  • the terminal 3 when the terminal 3 is not coated with a rust inhibitor, if the lead storage battery 1 is stored in a high-temperature and high-humidity environment corresponding to a tropical region or the like, the surface of the terminal 3 is oxidized, and It was found that the terminal might be whitened. To cope with this, when a known rust preventive is applied to the terminal 3, the rust preventive causes a chemical reaction with the metal of the terminal 3, which may cause the terminal 3 to become black or not to maintain the metallic luster. understood.
  • the inventor of the present invention has intensively studied materials for preventing the whitening and blackening of the terminal 3 due to oxidation, and as a result, covering the terminal 3 with rosin, which is not generally used as a rust preventive, has resulted in the whitening of the terminal 3. And prevention of blackening and the like.
  • the rosin may be any rosin-based resin containing rosin acid (such as abietic acid, parastolic acid, and isopimaric acid) as a main component, such as tall rosin, gum rosin, and wood rosin. Rosin is also called colophony or colophonium.
  • rosin acid such as abietic acid, parastolic acid, and isopimaric acid
  • Rosin is used as a flux agent for improving the adhesion between the terminal 3 and the lid 2B when insert molding the terminal 3 of the conventional lead-acid battery and the lid 2B of the battery case 2A (for example, see Table 1). 2001-504631) and a use as a flux agent for improving the adhesion when the pole 5 of the lead storage battery 1 is cast into a lead alloy (for example, Japanese Patent No. 4876323). .
  • the entire terminal 3 is covered with rosin before insert molding the terminal 3 and the lid 2B of the battery case 2A, and before joining the connecting portion 4 of the terminal 3 to the electrode plate.
  • rosin are also used as both a rust inhibitor and a flux agent for improving the adhesion of each part.
  • FIG. 3 shows an example of a manufacturing process from manufacturing the terminal 3 to shipping the lead storage battery 1.
  • step S1 a terminal manufacturing process for manufacturing the terminal 3 by casting is performed.
  • the terminal 3 is manufactured integrally with the connection portion 4.
  • a known method can be widely applied as a method of manufacturing the terminal.
  • step S2 a rosin dipping / drying step of mixing the powdered rosin and alcohol, immersing the terminal 3 in an alcohol solution containing rosin, and then drying is performed.
  • the time and temperature conditions required for immersion and drying may be set as appropriate.
  • the concentration of the alcohol solution obtained by mixing the rosin and the alcohol solution is preferably 1% to 5%. When the concentration is less than 1%, the effect of preventing the oxidation of the terminal is low. Further, if the content exceeds 5%, the effect is saturated. Therefore, considering the cost, the content is preferably 5% or less.
  • step S3 a battery assembly process for assembling the lead storage battery 1 is performed.
  • This step includes a known step such as a step of joining the terminal 3 and the electrode plate using a known method such as a cast-on-strap method, and a step of insert-molding the terminal 3 into the lid 2B of the battery case 2A.
  • the steps up to the final assembly of the lead storage battery 1 are performed.
  • step S4 the lead storage battery 1 is transported to a packing / shipping inspection line. Thus, various inspections for packing and shipping the lead storage battery 1 are performed.
  • the terminal 3 is covered with the rosin before the battery assembling step, there is no need to apply a rosin to the terminal 3 during the battery assembling step, and the step of covering the terminal 3 with the rosin is only required once. Further, according to the rosin dipping / drying process, a portion where rosin is not applied to the terminal 3 can be avoided.
  • Comparative Example 1 is a lead storage battery in which rosin and a rust preventive are not applied to the terminal 3
  • Comparative Example 2 is a lead storage battery in which a known rust preventive is applied to the terminal 3.
  • the rust inhibitor used in Comparative Example 2 was composed of a mineral oil, a rust inhibitor, and a petroleum-based solvent.
  • Example 1 and Comparative Examples 1 and 2 Each lead storage battery of Example 1 and Comparative Examples 1 and 2 was stored in a paper box for 7 days, 12 days, and 21 days, respectively, in a temperature environment of 80 degrees. Then, after storing each lead-acid battery in a temperature environment of ⁇ 10 ° C. for one day, the box is opened for a predetermined time, the box is wetted (wet state), and then the box is closed and the entire box is opened. Was covered with a wrap, and an experiment was performed in which the terminal 3 was observed after one week in a normal temperature environment. Table 1 shows the experimental results.
  • Example 1 As shown in Table 1, in the lead storage battery of Comparative Example 1, the entire surface of the terminal 3 was whitened and oxidation proceeded under any conditions. In Comparative Example 2, the terminal 3 under the condition stored for 21 days was partially whitened. In Comparative Example 2, the metallic luster of the terminal 3 was not maintained under any of the conditions, and the terminal 3 became dull. On the other hand, in Example 1, whitening of the terminal 3 was not observed under any of the conditions, and the metallic luster of the terminal 3 was maintained. This effect may have been contributed by the action of rosin as a surfactant.
  • the inventors did not whiten the terminal 3 even when the surface of the terminal 3 of the lead-acid battery 1 was polished and this terminal 3 was covered with rosin and the same experiment was performed. In addition, it was confirmed that the metallic luster of the terminal 3 was also maintained. In other words, even when whitening and dulling are more likely to occur by polishing, whitening and dulling can be sufficiently suppressed by covering with rosin.
  • each terminal 3 including the positive electrode terminal and the negative electrode terminal is covered with rosin to prevent rust, it is possible to prevent oxidation of each terminal even in a high-temperature and high-humidity environment, and to use materials and materials used for rust prevention. Discoloration due to a chemical reaction with the terminal can also be prevented. In other words, finding a use of the rosin as a rust preventive can provide a dustproof method suitable for the terminal 3 of the lead storage battery 1.
  • the terminal 3 since the entire terminal 3 including the connection portion 4 joined to the electrode plate is covered with rosin, the terminal 3 is covered with rosin before the battery assembling process, so that rosin is applied to the terminal 3 during the battery assembling process.
  • the rosin can be used both as a rust preventive and as a fluxing agent for improving the adhesiveness of each part, while eliminating the need for such work.
  • the terminal 3 is a box-shaped terminal having a hollow box-shaped portion exposed outside the battery body 2, a simple process of immersing the box-shaped terminal in a liquid containing rosin and drying the terminal is adopted.
  • the box terminal can be easily covered with rosin.
  • the above-described embodiment merely shows one aspect of the present invention, and can be arbitrarily modified and applied without departing from the gist of the present invention.
  • the present invention is applied to the lead-acid battery 1 shown in FIG. 1 and the method of rust-proofing the terminal of the lead-acid battery 1 has been described.
  • the present invention is not limited to this, and other known lead-acid batteries and terminals of the lead-acid battery are known. It may be applied to a rust prevention method.
  • the method of covering each terminal with rosin is not limited to the above-described method. For example, a method of spraying a sprayed rosin to each terminal 3 may be used.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The present invention makes it possible to prevent oxidation of terminals in a high-temperature and high-humidity environment and also prevent discoloration due to chemical reaction between the material used to prevent rusting and the terminals. Provided is a lead storage battery comprising a battery body 2, and terminals 3 that include a positive terminal and a negative terminal exposed outside the battery body 2, wherein the terminals 3 are coated with rosin to prevent rusting thereof.

Description

鉛蓄電池、及び鉛蓄電池の端子防錆方法Lead-acid battery and lead-acid battery terminal rust prevention method
　本発明は、鉛蓄電池、及び鉛蓄電池の端子防錆方法に関するものである。 (4) The present invention relates to a lead storage battery and a method for preventing rust of a terminal of the lead storage battery.
　電槽と、電槽外に露出する正極端子及び負極端子とを備える鉛蓄電池が知られている。この種の端子は、鉛合金等の金属材で形成されており、仕様に応じた形状とされる。例えば、自動二輪車に搭載される鉛蓄電池では、各端子を箱形端子にしている（例えば、特許文献１参照）。 2. Description of the Related Art A lead storage battery including a battery case, and a positive electrode terminal and a negative electrode terminal exposed outside the battery case is known. This type of terminal is formed of a metal material such as a lead alloy and has a shape according to specifications. For example, in a lead storage battery mounted on a motorcycle, each terminal is a box-shaped terminal (for example, see Patent Document 1).
特開２００１－２８３８２５号公報JP 2001-283825 A
　ところで、鉛蓄電池を、熱帯地方に相当する高温多湿環境で保管した場合、鉛合金製の各端子の表面に酸化鉛ができ、端子が白色化するおそれがあることが判った。
　各端子の表面の酸化を回避すべく、公知の防錆剤を各端子に塗布したところ、各端子の表面が黒色化し、金属光沢が維持されない状態となった。その理由は、公知の防錆剤が含む鉱物油やさび止め剤等が、端子と化学反応したためと考えられる。 By the way, it has been found that when the lead storage battery is stored in a high-temperature and high-humidity environment corresponding to a tropical region, lead oxide is formed on the surface of each lead alloy terminal, and the terminal may be whitened.
When a known rust preventive was applied to each terminal in order to avoid oxidation of the surface of each terminal, the surface of each terminal turned black, and the metallic luster was not maintained. It is considered that the reason is that the mineral oil and the rust inhibitor contained in the known rust preventive agent chemically reacted with the terminal.
　そこで、本発明は、高温多湿環境でも各端子の酸化を防止でき、かつ、防錆に使用する材料と各端子との化学反応による変色化も防止可能にすることを目的としている。
　なお、銅製もしくは銅合金製の芯金の表面の少なくとも一部にフラックス剤（有機ロジン）を塗布し、芯金と極柱本体の主体を構成する鉛合金との密着性の低下を抑制して電気抵抗の少ない極柱構造を備えた鉛蓄電池（特許第４８７６３２３号公報参照）が提案されているが、本発明とは目的、構成、効果が全く相違するものである。即ち、本発明は単に公知の技術を転用したものではなく、新規な知見に基づくものである。 Accordingly, an object of the present invention is to prevent oxidation of each terminal even in a high-temperature and high-humidity environment, and to prevent discoloration due to a chemical reaction between a material used for rust prevention and each terminal.
A flux agent (organic rosin) is applied to at least a part of the surface of the copper or copper alloy core to suppress a decrease in adhesion between the core and the lead alloy constituting the main body of the pole body. A lead-acid battery having a pole structure with low electric resistance (see Japanese Patent No. 4876323) has been proposed, but the purpose, configuration, and effects are completely different from those of the present invention. That is, the present invention is not simply a diversion of a known technique, but is based on a novel finding.
　なお、この明細書には、２０１８年６月２２日に出願された日本国特許出願・特願２０１８－１１８４８３号の全ての内容が含まれる。
　上述した課題を解決するため、本発明は、電池本体と、電池本体外に露出する正極端子及び負極端子とを備える鉛蓄電池において、前記正極端子及び前記負極端子からなる各端子をロジンで覆って防錆化していることを特徴とする。 This specification includes all contents of Japanese Patent Application No. 2018-118483 filed on June 22, 2018.
In order to solve the above-described problem, the present invention provides a lead storage battery including a battery body and a positive electrode terminal and a negative electrode terminal exposed outside the battery body, wherein each terminal including the positive electrode terminal and the negative electrode terminal is covered with rosin. It is characterized by rust prevention.
　上記構成において、前記端子には、前記電池本体内に配置される極板に接合される接続部が設けられ、前記接続部を含む前記端子の全体をロジンで覆ってもよい。 In the configuration described above, the terminal may be provided with a connection portion joined to an electrode plate arranged in the battery main body, and the entire terminal including the connection portion may be covered with rosin.
　また、上記構成において、前記端子は、前記電池本体外に露出する部分が中空箱形の箱形端子でもよい。 Further, in the above configuration, the terminal may be a box-shaped terminal having a portion exposed to the outside of the battery body and having a hollow box shape.
　また、本発明は、電池本体と、電池本体外に露出する正極端子及び負極端子とを備える鉛蓄電池の端子防錆方法において、前記正極端子及び前記負極端子からなる各端子の防錆剤として、ロジンを使用したことを特徴とする。 Further, the present invention provides a method for preventing rust of a lead-acid battery including a battery body and a positive electrode terminal and a negative electrode terminal exposed outside the battery body, wherein the rust preventive agent for each terminal including the positive electrode terminal and the negative electrode terminal includes: It is characterized by using rosin.
　また、上記構成において、前記端子には、前記電池本体内に配置される極板に接合される接続部が設けられ、かつ、各端子と前記電池本体とはインサート成形によって一体化され、前記接続部を前記極板に接合する前、かつ、前記インサート成形の前に、各端子の全体をロジンで覆ってもよい。 Further, in the above configuration, the terminal is provided with a connection portion joined to an electrode plate arranged in the battery main body, and each terminal and the battery main body are integrated by insert molding, and the connection is performed. Before joining the portion to the electrode plate and before the insert molding, each terminal may be entirely covered with rosin.
　また、上記構成において、ロジンを含有する液体に各端子を浸漬し、乾燥する工程によって、各端子をロジンで覆ってもよい。 In the above configuration, each terminal may be covered with a rosin by a step of dipping each terminal in a liquid containing rosin and drying.
　本発明によれば、高温多湿環境でも各端子の酸化を防止でき、かつ、防錆に使用する材料と各端子との化学反応による変色化も防止可能になる。 According to the present invention, oxidation of each terminal can be prevented even in a high-temperature and high-humidity environment, and discoloration due to a chemical reaction between a material used for rust prevention and each terminal can be prevented.
図１は、本発明の実施形態に係る鉛蓄電池の斜視図である。FIG. 1 is a perspective view of a lead storage battery according to an embodiment of the present invention. 図２は、端子を周辺構成と共に示した図である。FIG. 2 is a diagram showing the terminals together with the peripheral configuration. 図３は、製造工程の一例を示した図である。FIG. 3 is a diagram showing an example of the manufacturing process.
　以下、本発明の一実施の形態について説明する。
　図１は本発明の実施形態に係る鉛蓄電池の斜視図である。
　鉛蓄電池１は、直方体形状の電池本体２と、電池本体２外に露出する複数の端子３とを備えている。電池本体２は、内部が複数の室に区画され、各室に複数の極板が配置される箱形の電槽２Ａと、電槽２Ａの上方開口を覆う蓋２Ｂとを備えている。電槽２Ａ及び蓋２Ｂは、ポリプロピレン（ＰＰ）等の樹脂材で形成されている。 Hereinafter, an embodiment of the present invention will be described.
FIG. 1 is a perspective view of a lead storage battery according to an embodiment of the present invention.
The lead storage battery 1 includes a rectangular parallelepiped battery body 2 and a plurality of terminals 3 exposed outside the battery body 2. The battery main body 2 includes a box-shaped battery case 2A in which the inside is partitioned into a plurality of chambers and a plurality of electrode plates are arranged in each room, and a lid 2B that covers an upper opening of the battery case 2A. The battery case 2A and the lid 2B are formed of a resin material such as polypropylene (PP).
　複数の端子３は、正極端子と負極端子とで構成される。本実施形態では、正極端子と負極端子とが同一部品で形成されている。但し、正極端子と負極端子とで一部の形状等が異なっても良い。
　この鉛蓄電池１は、自動二輪車用の鉛蓄電池であり、端子３が中空箱形の箱形端子に形成されている。但し、この鉛蓄電池は、自動二輪車用でなくてもよく、様々な用途に使用される電池でもよい。また、端子３の形状は仕様に応じて適宜に変更してもよい。 The plurality of terminals 3 include a positive terminal and a negative terminal. In the present embodiment, the positive terminal and the negative terminal are formed of the same component. However, the positive electrode terminal and the negative electrode terminal may be partially different in shape and the like.
The lead storage battery 1 is a lead storage battery for a motorcycle, and the terminal 3 is formed as a hollow box-shaped box-shaped terminal. However, this lead storage battery does not have to be used for motorcycles and may be a battery used for various purposes. Further, the shape of the terminal 3 may be appropriately changed according to the specification.
　図２は端子３を周辺構成と共に示した図である。
　端子３には、複数の同極性の極板に接合される接続部４が一体に設けられ、ブッシング端子とも称する。この接続部４は、端子３から延びる極柱５と、極柱５における端子３と反対側に接合されるストラップ６とを有している。端子３、極柱５及びストラップ６は鉛合金等の金属材を用いて鋳造により一体に形成される。
　なお、極柱５に対応する箇所には、極柱５の周囲に張り出す複数の鍔部５Ａが設けられ、これら鍔部５Ａに対応する領域に蓋２Ｂがインサート成形により一体化される。 FIG. 2 is a diagram showing the terminal 3 together with the peripheral configuration.
The terminal 3 is provided integrally with a connecting portion 4 joined to a plurality of polar plates having the same polarity, and is also referred to as a bushing terminal. The connecting portion 4 has a pole 5 extending from the terminal 3 and a strap 6 joined to the pole 5 on the side opposite to the terminal 3. The terminal 3, the pole 5, and the strap 6 are integrally formed by casting using a metal material such as a lead alloy.
A plurality of flanges 5A projecting around the pole 5 are provided at locations corresponding to the poles 5, and a lid 2B is integrated by insert molding into a region corresponding to the flanges 5A.
　ところで、発明者等の検討によれば、端子３に防錆剤を塗布しない場合、熱帯地方等に相当する高温多湿環境で鉛蓄電池１を保管すると、端子３の表面が酸化し、酸化鉛により端子が白色化するおそれがあることが判った。
　これに対応すべく、公知の防錆剤を端子３に塗布したところ、防錆剤が端子３の金属と化学反応を起こし、端子３が黒色化したり、金属光沢が維持されない状態になることが判った。
　本発明者は、端子３の酸化による白色化、及び黒色化を防止する材料を鋭意検討した結果、一般的に防錆剤としては使用されないロジンで端子３を覆うことによって、端子３の白色化、及び黒色化等を防止することを見出した。 By the way, according to the study of the present inventors, when the terminal 3 is not coated with a rust inhibitor, if the lead storage battery 1 is stored in a high-temperature and high-humidity environment corresponding to a tropical region or the like, the surface of the terminal 3 is oxidized, and It was found that the terminal might be whitened.
To cope with this, when a known rust preventive is applied to the terminal 3, the rust preventive causes a chemical reaction with the metal of the terminal 3, which may cause the terminal 3 to become black or not to maintain the metallic luster. understood.
The inventor of the present invention has intensively studied materials for preventing the whitening and blackening of the terminal 3 due to oxidation, and as a result, covering the terminal 3 with rosin, which is not generally used as a rust preventive, has resulted in the whitening of the terminal 3. And prevention of blackening and the like.
　本実施形態では、接続部４を含む端子３の全体をロジンで覆うことで、高温多湿環境下でも端子３の白色化、及び黒色化等を防止している。
　ここで、ロジンは、ロジン酸（アビエチン酸、パラストリン酸、イソピマール酸等）を主成分とするロジン系樹脂であればよく、例えば、トールロジン、ガムロジン及びウッドロジン等である。なお、ロジンはコロホニー又はコロホニウムとも称される。 In the present embodiment, by covering the entire terminal 3 including the connection portion 4 with rosin, whitening and blackening of the terminal 3 are prevented even in a high-temperature and high-humidity environment.
Here, the rosin may be any rosin-based resin containing rosin acid (such as abietic acid, parastolic acid, and isopimaric acid) as a main component, such as tall rosin, gum rosin, and wood rosin. Rosin is also called colophony or colophonium.
　ロジンの用途には、従来の鉛蓄電池の端子３と電槽２Ａの蓋２Ｂとをインサート成形する際に、端子３と蓋２Ｂとの密着性を向上させるフラックス剤としての用途（例えば、特表２００１－５０４６３１号公報）や、鉛蓄電池１の極柱５を鉛合金に鋳込む際に、これらの密着性を向上させるフラックス剤としての用途（例えば、特許第４８７６３２３号公報）が知られている。
　本実施形態では、端子３と電槽２Ａの蓋２Ｂとをインサート成形する前、かつ、端子３の接続部４を極板に接合する前に、端子３の全体をロジンで覆っておくことで、ロジンを、防錆剤、及び各部の密着性を向上させるフラックス剤の両方に兼用している。 Rosin is used as a flux agent for improving the adhesion between the terminal 3 and the lid 2B when insert molding the terminal 3 of the conventional lead-acid battery and the lid 2B of the battery case 2A (for example, see Table 1). 2001-504631) and a use as a flux agent for improving the adhesion when the pole 5 of the lead storage battery 1 is cast into a lead alloy (for example, Japanese Patent No. 4876323). .
In the present embodiment, the entire terminal 3 is covered with rosin before insert molding the terminal 3 and the lid 2B of the battery case 2A, and before joining the connecting portion 4 of the terminal 3 to the electrode plate. And rosin are also used as both a rust inhibitor and a flux agent for improving the adhesion of each part.
　図３は、端子３を製作してから鉛蓄電池１を出荷するまでの製造工程の一例を示している。
　図３に示すように、まず、ステップＳ１として、端子３を鋳造により製作する端子製作工程を実施する。これによって、端子３が接続部４と共に一体に製作される。なお、端子を製作する方法は、公知の方法を広く適用可能である。 FIG. 3 shows an example of a manufacturing process from manufacturing the terminal 3 to shipping the lead storage battery 1.
As shown in FIG. 3, first, as step S1, a terminal manufacturing process for manufacturing the terminal 3 by casting is performed. As a result, the terminal 3 is manufactured integrally with the connection portion 4. In addition, as a method of manufacturing the terminal, a known method can be widely applied.
　次に、ステップＳ２として、端子３を、粉末状のロジンとアルコールを混合し、ロジンを含有させたアルコール溶液に浸漬させた後、乾燥するロジン浸漬・乾燥工程を実施する。これにより、端子３が複雑形状を有する箱形端子であっても、端子３全体を容易にロジンで覆うことができる。なお、浸漬・乾燥に要する時間や温度条件は適宜に設定すればよい。
　また、前記ロジンと前記アルコール溶液とを混合したアルコール溶液の濃度は、１％～５％が好ましい。前記濃度が１％未満の場合、端子の酸化を防止する効果が低い。また、５％超過とした場合、効果がサチュレーションしてしまうため、コストの面も考慮すると５％以下が好ましい。 Next, as step S2, a rosin dipping / drying step of mixing the powdered rosin and alcohol, immersing the terminal 3 in an alcohol solution containing rosin, and then drying is performed. Thereby, even if the terminal 3 is a box-shaped terminal having a complicated shape, the entire terminal 3 can be easily covered with the rosin. The time and temperature conditions required for immersion and drying may be set as appropriate.
The concentration of the alcohol solution obtained by mixing the rosin and the alcohol solution is preferably 1% to 5%. When the concentration is less than 1%, the effect of preventing the oxidation of the terminal is low. Further, if the content exceeds 5%, the effect is saturated. Therefore, considering the cost, the content is preferably 5% or less.
　続いて、ステップＳ３として、鉛蓄電池１を組み立てる電池組立工程を実施する。この工程は、キャストオンストラップ方式等の公知の方法を利用して端子３と極板とを接合する工程、端子３を電槽２Ａの蓋２Ｂにインサート成形する工程等の公知の工程を含み、鉛蓄電池１の最終組立まで行われる。
　その後、ステップＳ４として、鉛蓄電池１を梱包・出荷検査のラインに搬送する。これによって、鉛蓄電池１の梱包、及び出荷のための各種検査が行われる。 Subsequently, as step S3, a battery assembly process for assembling the lead storage battery 1 is performed. This step includes a known step such as a step of joining the terminal 3 and the electrode plate using a known method such as a cast-on-strap method, and a step of insert-molding the terminal 3 into the lid 2B of the battery case 2A. The steps up to the final assembly of the lead storage battery 1 are performed.
Thereafter, as step S4, the lead storage battery 1 is transported to a packing / shipping inspection line. Thus, various inspections for packing and shipping the lead storage battery 1 are performed.
　このように、電池組立工程の前に端子３をロジンで覆うので、電池組立工程中に、端子３にロジンを塗布する作業が不要であり、端子３をロジンで覆う工程が一回で済む。また、ロジン浸漬・乾燥工程によれば、端子３に対するロジンの塗布漏れ箇所を回避できる。 As described above, since the terminal 3 is covered with the rosin before the battery assembling step, there is no need to apply a rosin to the terminal 3 during the battery assembling step, and the step of covering the terminal 3 with the rosin is only required once. Further, according to the rosin dipping / drying process, a portion where rosin is not applied to the terminal 3 can be avoided.
　上記のようにして製造した鉛蓄電池１を実施例１とし、比較例１、２と比較する。
　比較例１は、端子３にロジン及び防錆剤を塗布していない鉛蓄電池であり、比較例２は、端子３に公知の防錆剤を塗布した鉛蓄電池である。比較例２に使用した防錆剤は、鉱物油、さび止め剤、及び石油系溶剤からなる。 The lead storage battery 1 manufactured as described above is referred to as Example 1 and is compared with Comparative Examples 1 and 2.
Comparative Example 1 is a lead storage battery in which rosin and a rust preventive are not applied to the terminal 3, and Comparative Example 2 is a lead storage battery in which a known rust preventive is applied to the terminal 3. The rust inhibitor used in Comparative Example 2 was composed of a mineral oil, a rust inhibitor, and a petroleum-based solvent.
　実施例１、及び比較例１、２の各鉛蓄電池をそれぞれ紙製の箱に梱包した状態で８０度の温度環境に７日間、１２日間、２１日間ずつ保管した。そして、各鉛蓄電池を－１０℃の温度環境に一日保管した後、箱を所定時間だけ開き、箱を湿らせて（湿った状態にしたて）、その後、箱を閉じた状態で箱全体をラップで覆い、常温環境で１週間経過した後の端子３を観察する実験を行った。この実験結果を表１に示す。 (4) Each lead storage battery of Example 1 and Comparative Examples 1 and 2 was stored in a paper box for 7 days, 12 days, and 21 days, respectively, in a temperature environment of 80 degrees. Then, after storing each lead-acid battery in a temperature environment of −10 ° C. for one day, the box is opened for a predetermined time, the box is wetted (wet state), and then the box is closed and the entire box is opened. Was covered with a wrap, and an experiment was performed in which the terminal 3 was observed after one week in a normal temperature environment. Table 1 shows the experimental results.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　表１に示すように、比較例１の鉛蓄電池は、いずれの条件でも端子３の表面全体が白色化し、酸化が進んだ。比較例２は、２１日間ずつ保管した条件の端子３が部分的に白色化した。また、比較例２は、いずれの条件も端子３の金属光沢が維持されず、くすんだ状態となった。
　これに対し、実施例１では、いずれの条件も端子３の白色化が見られず、端子３の金属光沢も維持された。この効果は、ロジンの界面活性剤としての作用が寄与した可能性がある。 As shown in Table 1, in the lead storage battery of Comparative Example 1, the entire surface of the terminal 3 was whitened and oxidation proceeded under any conditions. In Comparative Example 2, the terminal 3 under the condition stored for 21 days was partially whitened. In Comparative Example 2, the metallic luster of the terminal 3 was not maintained under any of the conditions, and the terminal 3 became dull.
On the other hand, in Example 1, whitening of the terminal 3 was not observed under any of the conditions, and the metallic luster of the terminal 3 was maintained. This effect may have been contributed by the action of rosin as a surfactant.
　また、発明者等は、鉛蓄電池１の端子３の表面を研磨し、この端子３をロジンで覆ったものについても同様の実験を行った場合にも、端子３の白色化が見られず、かつ、端子３の金属光沢も維持されることを確認した。つまり、研磨することで、より白色化やくすみが進みやすい状態であっても、ロジンで覆うことで、白色化やくすみを十分に抑制できた。 In addition, the inventors did not whiten the terminal 3 even when the surface of the terminal 3 of the lead-acid battery 1 was polished and this terminal 3 was covered with rosin and the same experiment was performed. In addition, it was confirmed that the metallic luster of the terminal 3 was also maintained. In other words, even when whitening and dulling are more likely to occur by polishing, whitening and dulling can be sufficiently suppressed by covering with rosin.
　以上説明したように、正極端子及び負極端子からなる各端子３をロジンで覆って防錆化しているので、高温多湿環境でも各端子の酸化を防止でき、かつ、防錆に使用する材料と各端子との化学反応による変色化も防止できる。
　換言すると、ロジンに防錆剤としての用途を見出すことで、鉛蓄電池１の端子３に好適な防塵方法を提供できる。 As described above, since each terminal 3 including the positive electrode terminal and the negative electrode terminal is covered with rosin to prevent rust, it is possible to prevent oxidation of each terminal even in a high-temperature and high-humidity environment, and to use materials and materials used for rust prevention. Discoloration due to a chemical reaction with the terminal can also be prevented.
In other words, finding a use of the rosin as a rust preventive can provide a dustproof method suitable for the terminal 3 of the lead storage battery 1.
　また、極板に接合される接続部４を含む端子３の全体をロジンで覆うので、電池組立工程の前に端子３をロジンで覆うことで、電池組立工程中に、端子３にロジンを塗布する作業を不要にしながら、ロジンを、防錆剤、及び各部の密着性を向上させるフラックス剤の両方に兼用できる。 In addition, since the entire terminal 3 including the connection portion 4 joined to the electrode plate is covered with rosin, the terminal 3 is covered with rosin before the battery assembling process, so that rosin is applied to the terminal 3 during the battery assembling process. The rosin can be used both as a rust preventive and as a fluxing agent for improving the adhesiveness of each part, while eliminating the need for such work.
　また、端子３は、電池本体２外に露出する部分が中空箱形の箱形端子であるので、ロジンを含有する液体に箱形端子を浸漬し、乾燥するといった簡易な工程を採用することで、箱形端子をロジンで容易に覆うことができる。 In addition, since the terminal 3 is a box-shaped terminal having a hollow box-shaped portion exposed outside the battery body 2, a simple process of immersing the box-shaped terminal in a liquid containing rosin and drying the terminal is adopted. In addition, the box terminal can be easily covered with rosin.
　なお、上述した実施形態は、あくまでも本発明の一態様を示すものであり、本発明の主旨を逸脱しない範囲で任意に変形および応用が可能である。例えば、本発明を、図１に示す鉛蓄電池１、及び鉛蓄電池１の端子防錆方法に適用する場合を説明したが、これに限定されず、公知の他の鉛蓄電池、及び鉛蓄電池の端子防錆方法に適用してもよい。
　また、各端子をロジンで覆う方法についても、上述した方法に限定されない。例えば、噴霧状のロジンを各端子３に吹き付ける方法等でもよい。 The above-described embodiment merely shows one aspect of the present invention, and can be arbitrarily modified and applied without departing from the gist of the present invention. For example, the case where the present invention is applied to the lead-acid battery 1 shown in FIG. 1 and the method of rust-proofing the terminal of the lead-acid battery 1 has been described. However, the present invention is not limited to this, and other known lead-acid batteries and terminals of the lead-acid battery are known. It may be applied to a rust prevention method.
Also, the method of covering each terminal with rosin is not limited to the above-described method. For example, a method of spraying a sprayed rosin to each terminal 3 may be used.
　１　鉛蓄電池
　２　電池本体
　２Ａ　電槽
　２Ｂ　蓋
　３　端子
　４　接続部
　５　極柱
　５Ａ　鍔部
　６　ストラップ DESCRIPTION OF SYMBOLS 1 Lead storage battery 2 Battery body 2A Battery case 2B Lid 3 Terminal 4 Connection part 5 Pole 5A Flange 6 Strap

Claims (6)

  1. 　電池本体と、電池本体外に露出する正極端子及び負極端子とを備える鉛蓄電池において、
    　前記正極端子及び前記負極端子からなる各端子をロジンで覆って防錆化していることを特徴とする鉛蓄電池。     In a lead-acid battery including a battery body and a positive electrode terminal and a negative electrode terminal exposed outside the battery body,
    A lead storage battery, wherein each terminal comprising the positive electrode terminal and the negative electrode terminal is covered with rosin to prevent rust.
  2. 　前記端子には、前記電池本体内に配置される極板に接合される接続部が設けられ、
    　前記接続部を含む前記端子の全体をロジンで覆っていることを特徴とする請求項１に記載の鉛蓄電池。     The terminal is provided with a connection portion joined to an electrode plate disposed in the battery body,
    The lead-acid battery according to claim 1, wherein the entire terminal including the connection part is covered with rosin.
  3. 　前記端子は、前記電池本体外に露出する部分が中空箱形の箱形端子であることを特徴とする請求項１又は２に記載の鉛蓄電池。 The lead-acid battery according to claim 1 or 2, wherein the terminal is a box-shaped terminal having a portion exposed to the outside of the battery body.
  4. 　電池本体と、電池本体外に露出する正極端子及び負極端子とを備える鉛蓄電池の端子防錆方法において、
    　前記正極端子及び前記負極端子からなる各端子の防錆剤として、ロジンを使用したことを特徴とする鉛蓄電池の端子防錆方法。     In a terminal rust prevention method for a lead-acid battery including a battery body and a positive electrode terminal and a negative electrode terminal exposed outside the battery body,
    A rust preventive method for a lead storage battery, wherein rosin is used as a rust preventive for each terminal comprising the positive electrode terminal and the negative electrode terminal.
  5. 　前記端子には、前記電池本体内に配置される極板に接合される接続部が設けられ、かつ、各端子と前記電池本体とはインサート成形によって一体化され、
    　前記接続部を前記極板に接合する前、かつ、前記インサート成形の前に、各端子の全体をロジンで覆うことを特徴とする請求項４に記載の鉛蓄電池の端子防錆方法。     The terminal is provided with a connection portion joined to an electrode plate disposed in the battery body, and each terminal and the battery body are integrated by insert molding,
    The method for preventing rust of a lead-acid battery terminal according to claim 4, wherein the whole of each terminal is covered with rosin before the connection portion is joined to the electrode plate and before the insert molding.
  6. 　ロジンを含有する液体に各端子を浸漬し、乾燥する工程によって、各端子をロジンで覆うことを特徴とする請求項４又は５に記載の鉛蓄電池の端子防錆方法。 6. The terminal rust prevention method for a lead-acid battery according to claim 4, wherein each terminal is covered with rosin by a step of dipping each terminal in a liquid containing rosin and drying.
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