WO2016013163A1 - Lead storage battery - Google Patents

Lead storage battery Download PDF

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Publication number
WO2016013163A1
WO2016013163A1 PCT/JP2015/003354 JP2015003354W WO2016013163A1 WO 2016013163 A1 WO2016013163 A1 WO 2016013163A1 JP 2015003354 W JP2015003354 W JP 2015003354W WO 2016013163 A1 WO2016013163 A1 WO 2016013163A1
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WO
WIPO (PCT)
Prior art keywords
positive
negative
strap
lid
terminal
Prior art date
Application number
PCT/JP2015/003354
Other languages
French (fr)
Japanese (ja)
Inventor
吉田　敏宏
鈴木　健一
直樹 杉崎
静 佐藤
和徳 下池
佐々木　健浩
Original Assignee
パナソニックＩｐマネジメント株式会社
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2016535771A priority Critical patent/JPWO2016013163A1/en
Publication of WO2016013163A1 publication Critical patent/WO2016013163A1/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
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/06—Lead-acid accumulators
    • H01M10/12—Construction or manufacture
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the 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
    • H01M50/547—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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • 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

Definitions

  • the present invention relates to a lead-acid battery, particularly a control valve type lead-acid battery.
  • the electrode plate group includes a positive electrode, a negative electrode, and a separator.
  • the hydrogen tightness generated by the overcharge reaction is absorbed by the negative electrode, so that sealing is important.
  • Patent Document 1 has a structure in which a recess is provided in a part of a metal portion in an insert location, and the recess is filled with a resin of the same material as the lid, and then the gap between the metal portion and the resin portion is filled with an adhesive. Has proposed.
  • the present invention provides a highly reliable lead-acid battery that can secure the sealing around the terminal even under the condition that the resin material repeatedly expands and contracts due to heat.
  • the lead storage battery of the present invention includes an electrode plate group, a resin battery case, a positive electrode strap, a negative electrode strap, a positive electrode column, a negative electrode column, a positive electrode terminal, a negative electrode terminal, and a resin lid.
  • the electrode plate group includes a plurality of positive electrodes, a plurality of negative electrodes, and a plurality of separators interposed between each of the plurality of positive electrodes and each of the plurality of negative electrodes.
  • the battery case has a cell chamber that accommodates the electrode plate group.
  • the positive strap is connected to a plurality of positive electrodes
  • the negative strap is connected to a plurality of negative electrodes.
  • the positive pole is connected to the positive strap and the negative pole is connected to the negative strap.
  • the positive terminal is connected to the positive pole and the negative terminal is connected to the negative pole.
  • the lid seals the opening of the battery case and embeds the positive terminal and the negative terminal by insert molding.
  • the positive electrode terminal and the negative electrode terminal have a lower surface portion located inside the lid from the outer surface of the lid, and a protruding portion that protrudes from the outer surface of the lid.
  • a resin film is provided so as to cover the entire surface of the lower surface portion and the peripheral portion of the lower surface portion of the lid, and the maximum thickness of the resin film on the lower surface portion is larger than the maximum thickness of the peripheral portion.
  • Patent Document 1 discloses a structure in which a welded part surrounding a terminal part and a part of a lid are covered with an epoxy resin. Since the epoxy resin and the lid are made of resin, the affinity between them is high, and the contact surface between them is strong. On the other hand, since the affinity between the epoxy resin and the metal weld is not high, the contact surface is fragile. The maximum thickness of the epoxy resin is substantially the same between the welded portion and a part of the lid located on the periphery thereof, or the welded portion is slightly smaller.
  • FIG. 1 is a partial perspective view schematically showing a lead storage battery according to an embodiment of the present invention
  • FIG. 2 is an enlarged view of a main part of the lead storage battery
  • FIG. 3 is a sectional view taken along line 3-3 in FIG.
  • the lead storage battery includes a plurality of electrode plate groups 1, a resin battery case 8, a positive electrode strap 2a, a negative electrode strap 2b, a positive electrode column 4a, a negative electrode column 4b, a positive electrode terminal 5a, a negative electrode terminal 5b, And a resin lid 5.
  • Each of the electrode plate groups 1 includes a plurality of positive electrodes 1a, a plurality of negative electrodes 1b, and a plurality of separators 1c interposed between each of the positive electrodes 1a and each of the negative electrodes 1b.
  • the battery case 8 has a plurality of cell chambers that respectively accommodate the plurality of electrode plate groups 1.
  • the positive strap 2a is bundled with the positive electrode 1a and connected to the positive electrode 1a, and the negative strap is bundled with the negative electrode 1b and connected to the negative electrode 1b.
  • the positive pole 4a is connected to the positive strap of the cell chamber at one end, and the negative pole 4b is connected to the negative strap 2b of the cell chamber at the other end.
  • the positive terminal 5a is connected to the positive pole 4a, and the negative terminal 5b is connected to the negative pole 4b.
  • the lid 5 seals the opening of the battery case 8 and embeds the positive terminal 5a and the negative terminal 5b by insert molding.
  • the positive electrode strap 2a and the negative electrode strap 2b of the adjacent cell chamber are connected in series.
  • the electrode plate group 1, the positive electrode strap 2a, and the negative electrode strap 2b are provided in the same number, respectively, and two adjacent ones of the electrode plate group 1 are connected via the positive electrode strap 2a and the negative electrode strap 2b. By connecting in series, all the electrode plate groups 1 are connected in series. Of the positive straps 2a, those not connected to the negative strap 2b are connected to the positive pole 4a, and among the negative straps 2b, those not connected to the positive strap 2a are connected to the negative pole 4b.
  • the positive electrode terminal 5 a is composed of a lower surface portion 6 a located inside the lid 5 rather than the outer surface of the lid 5 and a protruding portion 6 b projecting from the outer surface of the lid 5. That is, in FIGS. 1 to 3, the lower surface portion 6 a is positioned below the outer surface of the lid 5, and the protruding portion 6 b protrudes above the outer surface of the lid 5.
  • the protrusion 6b is usually connected to an external power supply or a load.
  • the negative electrode terminal 5b has a similar structure.
  • the positive electrode terminal 5a will be described as a representative.
  • the lead storage battery is provided with a resin film 7 that covers the entire surface of the lower surface portion 6 a and the peripheral portion 6 c of the lower surface portion 6 a of the lid 5.
  • the maximum thickness A on the lower surface portion 6a of the resin film 7 is larger than the maximum thickness B in the peripheral portion 6c.
  • the resin film 7 is relatively thick on the lower surface portion 6a of the positive electrode terminal 5a which is a metal portion. As a result, the resin film 7 immediately above the metal part can withstand the stress generated under the above-described conditions.
  • the positive electrode terminal 5a in which the protruding portion 6b is not positioned almost directly above the positive electrode column 4a is formed with the ear portion of the positive electrode 1a while molding the positive electrode strap 2a and the positive electrode column 4a together. It can be produced by a simple method called “cast-on strap” that can be connected. The same applies to the negative electrode terminal 5b. In this method, the area of the lower surface portion 6a on which the resin film 7 is provided is increased. For this reason, when the lid 5 and the resin film 7 are repeatedly expanded and contracted by heat, the influence of the stress applied to the joint surface between the lower surface portion 6a and the resin film 7 is large. Therefore, the above-described effect is easily exhibited.
  • the battery case 8 and the lid 5 can be formed of a resin material such as polypropylene or acrylonitrile-butadiene-styrene copolymer synthetic resin (ABS).
  • the resin film 7 can be formed of a resin material such as epoxy or polyolefin.
  • the general thickness of the resin film 7 is preferably 1 mm or more and 3 mm or less while satisfying the above-described relationship (A> B).
  • the positive strap 2a, the negative strap 2b, the positive pole 4a, the negative pole 4b, the positive terminal 5a, and the negative terminal 5b can be formed of a lead-calcium-tin lead-based alloy.
  • the protrusion 6b can be formed of a copper-based alloy such as brass.
  • the resin film 7 itself is made thicker toward the center so that A> B is satisfied.
  • the outer surface of the resin film 7 is flat as shown in FIG. You may make it satisfy
  • the upper surface of the lower surface portion 6 a and the peripheral portion 6 c of the lower surface portion 6 a of the lid 5 form the same surface.
  • the upper surface of the lower surface portion 6a is located inside the lid 5 rather than the peripheral portion 6c.
  • the battery case 8 has a plurality of cell chambers, and the electrode plate group 1 is inserted into each cell chamber and connected in series. However, only one electrode plate group 1 is used. May be.
  • the positive electrode 1a is produced as follows. First, a rolled sheet of a lead alloy containing 0.05% by mass of calcium and 1.6% by mass of tin is expanded to produce a positive electrode grid. The positive electrode grid is filled with a paste prepared with lead dioxide, water, sulfuric acid and additives, and after drying, cut into predetermined dimensions to produce the positive electrode 1a.
  • the negative electrode 1b is produced as follows. First, a lead alloy rolled sheet containing 0.07% by mass of calcium and 0.25% by mass of tin is expanded to produce a negative electrode lattice.
  • the negative electrode grid is filled with a paste prepared with lead powder, water, sulfuric acid, and additives, and after drying, is cut into predetermined dimensions to produce a negative electrode 1b.
  • the positive electrode group 1a and the negative electrode 1b are laminated
  • the separator 1c both the nonwoven fabric which uses a polyolefin-type fiber as a main raw material, and the papermaking which has a glass fiber and a polyester fiber as a main component are used.
  • all the positive electrodes 1a are connected to the positive straps 2a, and all the negative electrodes 1b are connected to the negative straps 2b.
  • the positive strap 2a and the negative strap 2b are formed of a lead alloy containing 2.5% by mass of tin. In this way, the electrode plate group 1 is completed.
  • the positive electrode strap 2a of the cell chamber at one end is connected to the positive electrode column 4a
  • the negative electrode strap 2b of the cell chamber at the other end is connected to the negative electrode column 4b.
  • the positive column 4a and the negative column 4b are formed of a lead alloy containing 2.5% by mass of tin.
  • the positive electrode strap 2a and the negative electrode strap 2b other than the above connect different polarities between the electrode plate groups 1 inserted in the adjacent cell chambers. In this way, six electrode plate groups 1 are connected in series.
  • the opening of the battery case 8 is sealed with the lid 5 made of ABS resin.
  • a positive electrode terminal 5a and a negative electrode terminal 5b are embedded in the lid 5 by insert molding.
  • the positive electrode terminal 5a and the negative electrode terminal 5b are formed of a lead alloy containing 3.0% by mass of antimony and 0.2% by mass of arsenic.
  • the positive electrode terminal 5a is connected to the positive electrode column 4a, and the negative electrode terminal 5b is connected to the negative electrode column 4b.
  • the positive electrode terminal 5a has a shape in which the protruding portion 6b is not positioned substantially immediately above the positive electrode column 4a. The same applies to the negative electrode terminal 5b.
  • sample A In sample A, an epoxy resin before curing is dropped onto the outer surface of the lid 5 on the lower surface portion 6a of the positive electrode terminal 5a and then cured, so that the entire surface of the lower surface portion 6a and its peripheral portion 6c are covered with the resin film 7. cover. Since the peripheral portion 6c made of a resin material has a higher affinity with the epoxy resin than the lower surface portion 6a made of a metal material, the resin film 7 is thick at both ends and thin at the center. As shown in FIG. 3, the maximum thickness A on the lower surface portion 6a is 3 mm and the maximum thickness B on the peripheral portion 6c is as shown in FIG. A resin film 7 of 2 mm is formed.
  • sample B As shown in FIG. 5, in the sample B, the peripheral portion 6c is made 1 mm higher than the lower surface portion 6a, and the epoxy resin is dropped a plurality of times as in the case of the sample A. In this way, the resin film 7 is formed. In this case, while the outer surface of the resin film 7 is flat, the maximum thickness on the lower surface portion 6a is 2.5 mm, and the maximum thickness on the peripheral portion 6c is 1.5 mm. The resin film 7 covers the entire lower surface portion 6a and the peripheral portion 6c. The rest is the same as Sample A.
  • sample C In sample A, after forming the shape shown in FIG. 4A, epoxy resin is further dropped only in the recessed portion in the center, but in sample C, the lead storage battery is completed as it is. That is, as shown in FIG. 4A, an epoxy resin before curing is dropped onto the outer surface of the lid 15 on the lower surface portion 16 a and then cured, whereby the entire surface of the lower surface portion 16 a and the peripheral portion 16 c are formed with the resin film 17. Covering. Specifically, the maximum thickness of A 1 on the lower surface portion 16a is 1 mm, the maximum thickness B 1 on the peripheral edge portion 16c is 2 mm. The rest is the same as Sample A.
  • sample D An epoxy resin is further dripped and hardened only to the recessed part of the center part with respect to the lead acid battery of the sample C.
  • FIG. 4B the amount of dripping is reduced or the number of times of dropping is reduced as compared with sample A.
  • FIG. 4B are both set 2mm maximum thickness B 2 of the maximum thickness A 2 and the peripheral portion 16c on on the lower surface portion 16a of the resin film 27. The rest is the same as Sample A.
  • sample A and sample B no change in the appearance of the resin film 7 was confirmed.
  • sample C cracks are confirmed in the resin film 17 and discoloration of the positive electrode terminal and the negative electrode terminal is confirmed. This discoloration is presumed to be caused by significant leakage of the electrolyte.
  • sample D although no discoloration of the positive electrode terminal and the negative electrode terminal is observed, a crack is confirmed in the resin film 27.
  • the present invention is useful when a control valve type lead-acid battery is used.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The lead storage battery comprises: an electrode plate group; a positive electrode strap and a negative electrode strap; a resin battery case having cell chambers into which the electrode plate group inserted; a positive electrode column connected to the positive electrode strap and a negative electrode column connected to the negative electrode strap; and a resin lid sealing the opening of the battery case while being insert-molded with a positive electrode terminal that establishes connection with the positive electrode column and a negative electrode terminal that establishes connection with the negative electrode column. Each of the positive electrode terminal and the negative electrode terminal has a lower surface portion located more to the interior of the lid than the external surface of the lid, and a protruding portion protruding farther than the external surface of the lid. A resin membrane is provided so as to cover the entire surface of the lower surface portion and a portion of the lid in the peripheral edge of the lower surface portion. The resin membrane has a greater maximum thickness above the lower surface portion than the maximum thickness in the peripheral edge portion.

Description

鉛蓄電池Lead acid battery
　本発明は鉛蓄電池、特に制御弁式鉛蓄電池に関する。 The present invention relates to a lead-acid battery, particularly a control valve type lead-acid battery.
　鉛蓄電池において、発電要素である極板群を収納した内部空間の密閉性を確保することは極めて重要である。極板群は、正極と負極とセパレータとで構成されている。特に制御弁式鉛蓄電池では、過充電反応で発生した水素ガスを負極に吸収させるため、密閉性が重要である。 In lead-acid batteries, it is extremely important to ensure the tightness of the internal space that houses the electrode plates that are power generation elements. The electrode plate group includes a positive electrode, a negative electrode, and a separator. In particular, in a valve-regulated lead-acid battery, the hydrogen tightness generated by the overcharge reaction is absorbed by the negative electrode, so that sealing is important.
　通常、鉛蓄電池の蓋は樹脂製であり、正極柱と接続される正極端子、負極柱と接続される負極端子は、蓋にインサート成型されている。このような構造において、内部空間の密閉性に影響するのは、インサート箇所における金属部分と樹脂部分の隙間（具体的には正極端子および負極端子の周縁部分）である。そこで、例えば特許文献１は、インサート箇所における金属部分の一部に窪みを設け、この窪みに蓋と同じ材質の樹脂を充填させた後、金属部分と樹脂部分との隙間を接着剤で埋める構造を提案している。 Usually, the lid of the lead-acid battery is made of resin, and the positive terminal connected to the positive pole and the negative terminal connected to the negative pole are insert-molded into the lid. In such a structure, it is the gap between the metal part and the resin part (specifically, the peripheral part of the positive electrode terminal and the negative electrode terminal) that affects the hermeticity of the internal space. Therefore, for example, Patent Document 1 has a structure in which a recess is provided in a part of a metal portion in an insert location, and the recess is filled with a resin of the same material as the lid, and then the gap between the metal portion and the resin portion is filled with an adhesive. Has proposed.
特開２００５－０３８８１０号公報JP 2005-038810 A
　本発明は、樹脂材料が熱により膨張と収縮を繰り返す条件下でも端子の周りの密閉性を確保でき、信頼性の高い鉛蓄電池を提供する。 The present invention provides a highly reliable lead-acid battery that can secure the sealing around the terminal even under the condition that the resin material repeatedly expands and contracts due to heat.
　本発明の鉛蓄電池は、極板群と、樹脂製の電槽と、正極ストラップと、負極ストラップと、正極柱と、負極柱と、正極端子と、負極端子と、樹脂製の蓋とを有する。極板群は、複数の正極と、複数の負極と、これら複数の正極のそれぞれと複数の負極のそれぞれとの間に各々介在する複数のセパレータとを含む。電槽は、極板群を収容するセル室を有する。正極ストラップは複数の正極に接続され、負極ストラップは複数の負極に接続されている。正極柱は正極ストラップに接続され、負極柱は負極ストラップに接続されている。正極端子は正極柱に接続され、負極端子は負極柱に接続されている。蓋は、電槽の開口部を封じるとともに、正極端子および負極端子をインサート成型により埋設している。正極端子および負極端子は、蓋の外面よりも蓋の内部に位置する下面部と、蓋の外面よりも突出した突出部とを有する。下面部の全面と、蓋における下面部の周縁部分とを覆うように樹脂膜が設けられ、樹脂膜の下面部上における最大厚さは、周縁部分における最大厚さよりも大きい。 The lead storage battery of the present invention includes an electrode plate group, a resin battery case, a positive electrode strap, a negative electrode strap, a positive electrode column, a negative electrode column, a positive electrode terminal, a negative electrode terminal, and a resin lid. . The electrode plate group includes a plurality of positive electrodes, a plurality of negative electrodes, and a plurality of separators interposed between each of the plurality of positive electrodes and each of the plurality of negative electrodes. The battery case has a cell chamber that accommodates the electrode plate group. The positive strap is connected to a plurality of positive electrodes, and the negative strap is connected to a plurality of negative electrodes. The positive pole is connected to the positive strap and the negative pole is connected to the negative strap. The positive terminal is connected to the positive pole and the negative terminal is connected to the negative pole. The lid seals the opening of the battery case and embeds the positive terminal and the negative terminal by insert molding. The positive electrode terminal and the negative electrode terminal have a lower surface portion located inside the lid from the outer surface of the lid, and a protruding portion that protrudes from the outer surface of the lid. A resin film is provided so as to cover the entire surface of the lower surface portion and the peripheral portion of the lower surface portion of the lid, and the maximum thickness of the resin film on the lower surface portion is larger than the maximum thickness of the peripheral portion.
　本発明によれば、樹脂材料が熱により膨張と収縮を繰り返す条件下でも端子の周りの密閉性を確保できる、信頼性の高い鉛蓄電池を提供することができる。 According to the present invention, it is possible to provide a highly reliable lead-acid battery that can secure the sealing around the terminal even under the condition that the resin material repeatedly expands and contracts due to heat.
本発明の実施の形態による鉛蓄電池を模式的に示した部分透視図The partial perspective view which showed typically the lead acid battery by embodiment of this invention 図１に示す鉛蓄電池の要部拡大図Enlarged view of the main part of the lead-acid battery shown in FIG. 図２の３－３線における要部断面図Sectional view along line 3-3 in FIG. 本発明の実施の形態とは異なる鉛蓄電池の要部断面図Sectional drawing of the principal part of the lead acid battery different from embodiment of this invention 本発明の実施の形態とは異なる他の鉛蓄電池の要部断面図Sectional drawing of the principal part of the other lead acid battery different from embodiment of this invention 本発明の実施の形態による他の鉛蓄電池の要部断面図Sectional drawing of the principal part of the other lead acid battery by embodiment of this invention
　本発明の実施の形態の説明に先立ち、従来の鉛蓄電池における問題点を簡単に説明する。特許文献１のようにインサート箇所を工夫しても、樹脂材料が熱により膨張と収縮を繰り返す条件下においては、端子の周りが変形して密閉性が不十分になる。特に、インサート箇所における金属部分の面積が大きく膨張収縮を繰り返す樹脂材料との接触面積が大きい場合、この傾向は顕著である。 Prior to the description of the embodiment of the present invention, problems in the conventional lead storage battery will be briefly described. Even if the insert location is devised as in Patent Document 1, the periphery of the terminal is deformed and the sealing performance is insufficient under the condition that the resin material repeatedly expands and contracts due to heat. In particular, this tendency is remarkable when the area of the metal portion at the insert location is large and the contact area with the resin material that repeats expansion and contraction is large.
　特許文献１は、端子部を取り囲む溶接部と蓋の一部とをエポキシ樹脂で覆った構造を開示している。エポキシ樹脂と蓋とは樹脂製であるため、互いの親和性は高く、それらの間の接触面は強固である。一方、エポキシ樹脂と金属製の溶接部との親和性は高くないので、接触面が脆弱である。そして、エポキシ樹脂の最大厚みは溶接部とその周縁に位置する蓋の一部とで略同一かあるいは溶接部の方がやや小さい。 Patent Document 1 discloses a structure in which a welded part surrounding a terminal part and a part of a lid are covered with an epoxy resin. Since the epoxy resin and the lid are made of resin, the affinity between them is high, and the contact surface between them is strong. On the other hand, since the affinity between the epoxy resin and the metal weld is not high, the contact surface is fragile. The maximum thickness of the epoxy resin is substantially the same between the welded portion and a part of the lid located on the periphery thereof, or the welded portion is slightly smaller.
　このような構造において、蓋やエポキシ樹脂が熱により膨張と収縮を繰り返すと、溶接部の直上を起点としてエポキシ樹脂が応力に耐えられなくなって破壊される。 In such a structure, when the lid and the epoxy resin repeatedly expand and contract due to heat, the epoxy resin cannot withstand the stress starting from directly above the welded portion and is destroyed.
　以下、本発明の実施の形態について、図面を参照しながら説明する。図１は本発明の実施の形態による鉛蓄電池を模式的に示した部分透視図、図２はこの鉛蓄電池の要部拡大図、図３は図２の３－３線における断面図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial perspective view schematically showing a lead storage battery according to an embodiment of the present invention, FIG. 2 is an enlarged view of a main part of the lead storage battery, and FIG. 3 is a sectional view taken along line 3-3 in FIG.
　鉛蓄電池は、複数の極板群１と、樹脂製の電槽８と、正極ストラップ２ａと、負極ストラップ２ｂと、正極柱４ａと、負極柱４ｂと、正極端子５ａと、負極端子５ｂと、樹脂製の蓋５とを有する。極板群１はそれぞれ、複数の正極１ａと、複数の負極１ｂと、正極１ａのそれぞれと負極１ｂのそれぞれとの間に各々介在する複数のセパレータ１ｃとを含む。電槽８は、複数の極板群１をそれぞれ収容する複数のセル室を有する。正極ストラップ２ａは正極１ａを束ねて正極１ａに接続され、負極ストラップは負極１ｂを束ねて負極１ｂに接続されている。正極柱４ａは一端のセル室の正極ストラップに接続され、負極柱４ｂは他端のセル室の負極ストラップ２ｂに接続されている。正極端子５ａは正極柱４ａに接続され、負極端子５ｂは負極柱４ｂに接続されている。蓋５は、電槽８の開口部を封じるとともに、正極端子５ａおよび負極端子５ｂをインサート成型により埋設している。隣接するセル室の正極ストラップ２ａと負極ストラップ２ｂとは直列に接続されている。 The lead storage battery includes a plurality of electrode plate groups 1, a resin battery case 8, a positive electrode strap 2a, a negative electrode strap 2b, a positive electrode column 4a, a negative electrode column 4b, a positive electrode terminal 5a, a negative electrode terminal 5b, And a resin lid 5. Each of the electrode plate groups 1 includes a plurality of positive electrodes 1a, a plurality of negative electrodes 1b, and a plurality of separators 1c interposed between each of the positive electrodes 1a and each of the negative electrodes 1b. The battery case 8 has a plurality of cell chambers that respectively accommodate the plurality of electrode plate groups 1. The positive strap 2a is bundled with the positive electrode 1a and connected to the positive electrode 1a, and the negative strap is bundled with the negative electrode 1b and connected to the negative electrode 1b. The positive pole 4a is connected to the positive strap of the cell chamber at one end, and the negative pole 4b is connected to the negative strap 2b of the cell chamber at the other end. The positive terminal 5a is connected to the positive pole 4a, and the negative terminal 5b is connected to the negative pole 4b. The lid 5 seals the opening of the battery case 8 and embeds the positive terminal 5a and the negative terminal 5b by insert molding. The positive electrode strap 2a and the negative electrode strap 2b of the adjacent cell chamber are connected in series.
　すなわち、極板群１と、正極ストラップ２ａと、負極ストラップ２ｂとはそれぞれ同じ数で設けられ、極板群１のうちの隣接する２つはいずれも正極ストラップ２ａと負極ストラップ２ｂとを介して直列接続されることで、全ての極板群１は直列接続されている。正極ストラップ２ａのうち、負極ストラップ２ｂに接続されていないものが正極柱４ａに接続され、負極ストラップ２ｂのうち、正極ストラップ２ａに接続されていないものが負極柱４ｂに接続されている。 That is, the electrode plate group 1, the positive electrode strap 2a, and the negative electrode strap 2b are provided in the same number, respectively, and two adjacent ones of the electrode plate group 1 are connected via the positive electrode strap 2a and the negative electrode strap 2b. By connecting in series, all the electrode plate groups 1 are connected in series. Of the positive straps 2a, those not connected to the negative strap 2b are connected to the positive pole 4a, and among the negative straps 2b, those not connected to the positive strap 2a are connected to the negative pole 4b.
　正極端子５ａは、蓋５の外面よりも蓋５の内部に位置する下面部６ａと、蓋５の外面よりも突出した突出部６ｂとからなっている。すなわち、図１～図３において、下面部６ａは蓋５の外面よりも下方に位置し、突出部６ｂは蓋５の外面よりも上方に突出している。突出部６ｂは通常、外部電源や負荷と接続される。なお、図示していないが負極端子５ｂも同様の構造を有する。以下、代表して正極端子５ａに関して説明する。 The positive electrode terminal 5 a is composed of a lower surface portion 6 a located inside the lid 5 rather than the outer surface of the lid 5 and a protruding portion 6 b projecting from the outer surface of the lid 5. That is, in FIGS. 1 to 3, the lower surface portion 6 a is positioned below the outer surface of the lid 5, and the protruding portion 6 b protrudes above the outer surface of the lid 5. The protrusion 6b is usually connected to an external power supply or a load. Although not shown, the negative electrode terminal 5b has a similar structure. Hereinafter, the positive electrode terminal 5a will be described as a representative.
　さらに、この鉛蓄電池には、下面部６ａの全面と、蓋５における下面部６ａの周縁部分６ｃとを覆う樹脂膜７が設けられている。樹脂膜７の下面部６ａ上における最大厚さＡは、周縁部分６ｃにおける最大厚さＢよりも大きい。 Further, the lead storage battery is provided with a resin film 7 that covers the entire surface of the lower surface portion 6 a and the peripheral portion 6 c of the lower surface portion 6 a of the lid 5. The maximum thickness A on the lower surface portion 6a of the resin film 7 is larger than the maximum thickness B in the peripheral portion 6c.
　このように、本実施の形態では、金属部分である正極端子５ａの下面部６ａ上において、樹脂膜７が相対的に厚い。その結果、金属部分の直上の樹脂膜７が上述した条件下で発生した応力にも耐えられる。 Thus, in the present embodiment, the resin film 7 is relatively thick on the lower surface portion 6a of the positive electrode terminal 5a which is a metal portion. As a result, the resin film 7 immediately above the metal part can withstand the stress generated under the above-described conditions.
　ところで、図１～図３に示すように正極柱４ａの略直上に突出部６ｂが位置しない正極端子５ａは、正極ストラップ２ａと正極柱４ａとを一緒に成型しながら正極１ａの耳部とを接続できる「キャストオンストラップ」という簡便な方式によって作製できる。これは、負極端子５ｂについても同様である。この方法では、樹脂膜７が設けられる下面部６ａの面積が大きくなる。そのため、蓋５や樹脂膜７が熱により膨張と収縮を繰り返すと下面部６ａと樹脂膜７との間の接合面に印加される応力の影響が大きい。したがって、上述の効果が発揮されやすい。 By the way, as shown in FIG. 1 to FIG. 3, the positive electrode terminal 5a in which the protruding portion 6b is not positioned almost directly above the positive electrode column 4a is formed with the ear portion of the positive electrode 1a while molding the positive electrode strap 2a and the positive electrode column 4a together. It can be produced by a simple method called “cast-on strap” that can be connected. The same applies to the negative electrode terminal 5b. In this method, the area of the lower surface portion 6a on which the resin film 7 is provided is increased. For this reason, when the lid 5 and the resin film 7 are repeatedly expanded and contracted by heat, the influence of the stress applied to the joint surface between the lower surface portion 6a and the resin film 7 is large. Therefore, the above-described effect is easily exhibited.
　このように、突出部６ｂが正極柱４ａの直上からずれている場合に上述の効果が発揮されやすい。同様に、負極端子５ｂの突出部が負極柱４ｂの直上からずれている場合に上述の効果が発揮されやすい。 Thus, the above-described effects are easily exhibited when the protruding portion 6b is displaced from directly above the positive pole 4a. Similarly, when the protruding portion of the negative electrode terminal 5b is displaced from directly above the negative electrode column 4b, the above-described effect is easily exhibited.
　なお、電槽８および蓋５は、ポリプロピレンやアクリロニトリル－ブタジエン－スチレン共重合合成樹脂（ＡＢＳ）などの樹脂材料で形成することができる。樹脂膜７はエポキシやポリオレフィンなどの樹脂材料で形成することができる。樹脂膜７の一般的な厚さは、上述した関係（Ａ＞Ｂ）を満たしつつ、１ｍｍ以上、３ｍｍ以下であることが好ましい。 The battery case 8 and the lid 5 can be formed of a resin material such as polypropylene or acrylonitrile-butadiene-styrene copolymer synthetic resin (ABS). The resin film 7 can be formed of a resin material such as epoxy or polyolefin. The general thickness of the resin film 7 is preferably 1 mm or more and 3 mm or less while satisfying the above-described relationship (A> B).
　また、正極ストラップ２ａ、負極ストラップ２ｂ、正極柱４ａ、負極柱４ｂ、正極端子５ａおよび負極端子５ｂは、鉛－カルシウム－スズの鉛ベースの合金で形成することができる。なお、突出部６ｂは真鍮などの銅ベースの合金で形成することもできる。 Further, the positive strap 2a, the negative strap 2b, the positive pole 4a, the negative pole 4b, the positive terminal 5a, and the negative terminal 5b can be formed of a lead-calcium-tin lead-based alloy. The protrusion 6b can be formed of a copper-based alloy such as brass.
　さらに、図１～図３では樹脂膜７自体を中央ほど厚い形状にすることでＡ＞Ｂを満たすようにしたが、図５のように樹脂膜７の外面は平坦にしつつＡ＞Ｂの関係を満たすようにしてもよい。図３に示す構造では、下面部６ａの上面と、蓋５における下面部６ａの周縁部分６ｃとが同一面を形成している。一方、図５に示す構造では、下面部６ａの上面は、周縁部分６ｃよりも蓋５の内部に位置している。 Further, in FIG. 1 to FIG. 3, the resin film 7 itself is made thicker toward the center so that A> B is satisfied. However, the outer surface of the resin film 7 is flat as shown in FIG. You may make it satisfy | fill. In the structure shown in FIG. 3, the upper surface of the lower surface portion 6 a and the peripheral portion 6 c of the lower surface portion 6 a of the lid 5 form the same surface. On the other hand, in the structure shown in FIG. 5, the upper surface of the lower surface portion 6a is located inside the lid 5 rather than the peripheral portion 6c.
　なお以上の説明では、電槽８が複数のセル室を有し、各セル室に極板群１を挿入して直列接続した場合を例に説明したが、極板群１を１つだけ用いてもよい。 In the above description, the battery case 8 has a plurality of cell chambers, and the electrode plate group 1 is inserted into each cell chamber and connected in series. However, only one electrode plate group 1 is used. May be.
　以下、具体的な例として、ＥＣ－ＦＶ１２６０（５時間率容量６０Ａｈ）を作製し評価した結果を参照しながら本実施の形態による効果を説明する。 Hereinafter, as a specific example, the effects of the present embodiment will be described with reference to the results of producing and evaluating EC-FV1260 (5-hour rate capacity 60 Ah).
　まず、全てのサンプルに共通する部分について説明する。正極１ａは以下のようにして作製している。まずカルシウム０．０５質量％、スズ１．６質量％を含む鉛合金の圧延シートをエキスパンド加工して正極格子体を作製する。この正極格子体に、二酸化鉛と水と硫酸および添加剤で調製されたペーストを充填し、乾燥後に所定の寸法に切断して正極１ａを作製している。負極１ｂは以下のようにして作製している。まず、カルシウム０．０７質量％、スズ０．２５質量％を含む鉛合金の圧延シートをエキスパンド加工して負極格子体を作製する。この負極格子体に、鉛粉と水と硫酸および添加剤で調製されたペーストを充填し、乾燥後に所定の寸法に切断して負極１ｂを作製している。そして、正極１ａと負極１ｂを、セパレータ１ｃを介して交互に積層し、極板群１を構成している。なおセパレータ１ｃとして、ポリオレフィン系繊維を主原料とする不織布と、ガラス繊維およびポリエステル繊維を主成分とした抄造物の双方を用いている。 First, the parts common to all samples will be described. The positive electrode 1a is produced as follows. First, a rolled sheet of a lead alloy containing 0.05% by mass of calcium and 1.6% by mass of tin is expanded to produce a positive electrode grid. The positive electrode grid is filled with a paste prepared with lead dioxide, water, sulfuric acid and additives, and after drying, cut into predetermined dimensions to produce the positive electrode 1a. The negative electrode 1b is produced as follows. First, a lead alloy rolled sheet containing 0.07% by mass of calcium and 0.25% by mass of tin is expanded to produce a negative electrode lattice. The negative electrode grid is filled with a paste prepared with lead powder, water, sulfuric acid, and additives, and after drying, is cut into predetermined dimensions to produce a negative electrode 1b. And the positive electrode group 1a and the negative electrode 1b are laminated | stacked alternately via the separator 1c, and the electrode group 1 is comprised. In addition, as the separator 1c, both the nonwoven fabric which uses a polyolefin-type fiber as a main raw material, and the papermaking which has a glass fiber and a polyester fiber as a main component are used.
　そしてキャストオンストラップ方式で、全ての正極１ａを正極ストラップ２ａと接続し、全ての負極１ｂを負極ストラップ２ｂと接続している。正極ストラップ２ａ、負極ストラップ２ｂはスズ２．５質量％を含む鉛合金で形成されている。このようにして極板群１が完成する。 In a cast-on-strap system, all the positive electrodes 1a are connected to the positive straps 2a, and all the negative electrodes 1b are connected to the negative straps 2b. The positive strap 2a and the negative strap 2b are formed of a lead alloy containing 2.5% by mass of tin. In this way, the electrode plate group 1 is completed.
　次に、極板群１を６個、ポリプロピレン製の電槽８の６つのセル室にそれぞれ挿入する。そして、一端のセル室の正極ストラップ２ａを正極柱４ａに接続し、他端のセル室の負極ストラップ２ｂを負極柱４ｂに接続している。正極柱４ａ、負極柱４ｂはスズ２．５質量％を含む鉛合金で形成されている。上記以外の正極ストラップ２ａおよび負極ストラップ２ｂは、隣接するセル室に挿入された極板群１間で、異極性同士を接続する。このようにして、６個の極板群１を直列に接続している。 Next, six electrode plate groups 1 are inserted into six cell chambers of the battery case 8 made of polypropylene, respectively. The positive electrode strap 2a of the cell chamber at one end is connected to the positive electrode column 4a, and the negative electrode strap 2b of the cell chamber at the other end is connected to the negative electrode column 4b. The positive column 4a and the negative column 4b are formed of a lead alloy containing 2.5% by mass of tin. The positive electrode strap 2a and the negative electrode strap 2b other than the above connect different polarities between the electrode plate groups 1 inserted in the adjacent cell chambers. In this way, six electrode plate groups 1 are connected in series.
　次いで、ＡＢＳ樹脂製の蓋５で、電槽８の開口部を封口している。蓋５には、正極端子５ａ、負極端子５ｂがインサート成型により埋設されている。正極端子５ａ、負極端子５ｂは、アンチモン３．０質量％、ヒ素０．２質量％を含む鉛合金で形成されている。そして、正極端子５ａを正極柱４ａに、負極端子５ｂを負極柱４ｂにそれぞれ接続している。なお正極端子５ａは、図１～図３に示すように、正極柱４ａの略直上に突出部６ｂが位置しない形状を有する。負極端子５ｂも同様である。 Next, the opening of the battery case 8 is sealed with the lid 5 made of ABS resin. A positive electrode terminal 5a and a negative electrode terminal 5b are embedded in the lid 5 by insert molding. The positive electrode terminal 5a and the negative electrode terminal 5b are formed of a lead alloy containing 3.0% by mass of antimony and 0.2% by mass of arsenic. The positive electrode terminal 5a is connected to the positive electrode column 4a, and the negative electrode terminal 5b is connected to the negative electrode column 4b. As shown in FIGS. 1 to 3, the positive electrode terminal 5a has a shape in which the protruding portion 6b is not positioned substantially immediately above the positive electrode column 4a. The same applies to the negative electrode terminal 5b.
　次に、各サンプルで異なる点について図３～図５を参照しながら説明する。なお、以下の説明では正極端子５ａに樹脂膜７を形成する手順を説明するが、負極端子５ｂについても同様である。 Next, differences between each sample will be described with reference to FIGS. In the following description, the procedure for forming the resin film 7 on the positive electrode terminal 5a will be described, but the same applies to the negative electrode terminal 5b.
　（サンプルＡ）
　サンプルＡでは、正極端子５ａの下面部６ａの上に、硬化前のエポキシ樹脂を蓋５の外面まで滴下した後に硬化させることで、下面部６ａの全面とその周縁部分６ｃとを樹脂膜７で覆う。金属材料で構成された下面部６ａよりも樹脂材料で構成された周縁部分６ｃの方がエポキシ樹脂と親和性が高いため、樹脂膜７では、両端が厚く、中央が薄い形状となる。この中央部の凹んだ箇所のみにエポキシ樹脂をさらに滴下して硬化させることで、図３に示すように、下面部６ａ上における最大厚さＡが３ｍｍ、周縁部分６ｃ上における最大厚さＢが２ｍｍである樹脂膜７を形成している。 (Sample A)
In sample A, an epoxy resin before curing is dropped onto the outer surface of the lid 5 on the lower surface portion 6a of the positive electrode terminal 5a and then cured, so that the entire surface of the lower surface portion 6a and its peripheral portion 6c are covered with the resin film 7. cover. Since the peripheral portion 6c made of a resin material has a higher affinity with the epoxy resin than the lower surface portion 6a made of a metal material, the resin film 7 is thick at both ends and thin at the center. As shown in FIG. 3, the maximum thickness A on the lower surface portion 6a is 3 mm and the maximum thickness B on the peripheral portion 6c is as shown in FIG. A resin film 7 of 2 mm is formed.
　最後に、蓋５の外面にセル室ごとに設けられた穴から電解液（希硫酸）を注入した後、穴を制御弁で塞ぎ、所定の条件で化成を行って、サンプルＡの鉛蓄電池を作製している。 Finally, after injecting an electrolytic solution (dilute sulfuric acid) from the hole provided for each cell chamber on the outer surface of the lid 5, the hole is closed with a control valve, and chemical conversion is performed under predetermined conditions. I am making it.
　（サンプルＢ）
　図５に示すように、サンプルＢでは、下面部６ａよりも周縁部分６ｃを１ｍｍ高くし、サンプルＡと同様にエポキシ樹脂を複数回滴下している。このようにして、樹脂膜７を形成している。この場合、樹脂膜７の外面は平坦ながら、下面部６ａ上における最大厚さは２．５ｍｍ、周縁部分６ｃ上における最大厚さは１．５ｍｍとなる。樹脂膜７は、下面部６ａの全面と周縁部分６ｃとを覆っている。これ以外はサンプルＡと同様である。 (Sample B)
As shown in FIG. 5, in the sample B, the peripheral portion 6c is made 1 mm higher than the lower surface portion 6a, and the epoxy resin is dropped a plurality of times as in the case of the sample A. In this way, the resin film 7 is formed. In this case, while the outer surface of the resin film 7 is flat, the maximum thickness on the lower surface portion 6a is 2.5 mm, and the maximum thickness on the peripheral portion 6c is 1.5 mm. The resin film 7 covers the entire lower surface portion 6a and the peripheral portion 6c. The rest is the same as Sample A.
　（サンプルＣ）
　サンプルＡでは図４Ａに示す形状を形成した後、中央部の凹んだ箇所のみにエポキシ樹脂をさらに滴下しているが、サンプルＣではそのままで鉛蓄電池を完成させている。すなわち、図４Ａに示すように、下面部１６ａの上に、硬化前のエポキシ樹脂を蓋１５の外面まで滴下した後に硬化させることで、下面部１６ａの全面と周縁部分１６ｃとを樹脂膜１７で覆っている。具体的には、下面部１６ａ上における最大厚さＡ１は１ｍｍ、周縁部分１６ｃ上における最大厚さＢ１は２ｍｍである。これ以外はサンプルＡと同様である。 (Sample C)
In sample A, after forming the shape shown in FIG. 4A, epoxy resin is further dropped only in the recessed portion in the center, but in sample C, the lead storage battery is completed as it is. That is, as shown in FIG. 4A, an epoxy resin before curing is dropped onto the outer surface of the lid 15 on the lower surface portion 16 a and then cured, whereby the entire surface of the lower surface portion 16 a and the peripheral portion 16 c are formed with the resin film 17. Covering. Specifically, the maximum thickness of A 1 on the lower surface portion 16a is 1 mm, the maximum thickness B 1 on the peripheral edge portion 16c is 2 mm. The rest is the same as Sample A.
　（サンプルＤ）
　サンプルＣの鉛蓄電池に対して、中央部の凹んだ箇所のみにエポキシ樹脂をさらに滴下して硬化させる。この際、サンプルＡに比べて滴下量を減らすか、滴下回数を減らす。これらの方法で、図４Ｂに示すように、樹脂膜２７の下面部１６ａ上における最大厚さＡ２と周縁部分１６ｃ上における最大厚さＢ２をともに２ｍｍとしている。これ以外はサンプルＡと同様である。 (Sample D)
An epoxy resin is further dripped and hardened only to the recessed part of the center part with respect to the lead acid battery of the sample C. FIG. At this time, the amount of dripping is reduced or the number of times of dropping is reduced as compared with sample A. In these methods, as shown in FIG. 4B, are both set 2mm maximum thickness B 2 of the maximum thickness A 2 and the peripheral portion 16c on on the lower surface portion 16a of the resin film 27. The rest is the same as Sample A.
　以上のように構成されたサンプルＡ～サンプルＤの鉛蓄電池を、２５℃でＳＯＣ１１０％見合いの充電を行った後、以下の条件のヒートサイクル試験を２０回繰り返すことで、意図的に樹脂膜に応力を与える評価を行っている。ヒートサイクル試験では、まず－３０℃に２時間晒す。次に、５分以内に８０℃まで昇温し、８０℃に２時間晒す。その後、５分以内に－３０℃まで冷やす。 After charging the lead storage batteries of Sample A to Sample D configured as described above at a temperature corresponding to SOC 110% at 25 ° C., the heat cycle test under the following conditions was repeated 20 times to intentionally form the resin film. An evaluation is given to give stress. In the heat cycle test, it is first exposed to −30 ° C. for 2 hours. Next, the temperature is raised to 80 ° C. within 5 minutes and exposed to 80 ° C. for 2 hours. Then cool to -30 ° C within 5 minutes.
　サンプルＡ、サンプルＢでは、樹脂膜７に外観上の変化は確認されていない。一方、サンプルＣでは、樹脂膜１７にクラックが確認されるとともに、正極端子および負極端子の変色が確認されている。この変色は、電解液の顕著な漏れが原因と推定される。またサンプルＤでは、正極端子および負極端子の変色は見られないものの、樹脂膜２７にクラックが確認されている。 In sample A and sample B, no change in the appearance of the resin film 7 was confirmed. On the other hand, in sample C, cracks are confirmed in the resin film 17 and discoloration of the positive electrode terminal and the negative electrode terminal is confirmed. This discoloration is presumed to be caused by significant leakage of the electrolyte. In sample D, although no discoloration of the positive electrode terminal and the negative electrode terminal is observed, a crack is confirmed in the resin film 27.
　以上、本発明の実施の形態について説明したが、こうした記述は限定事項ではなく、もちろん、種々の改変が可能である。 The embodiment of the present invention has been described above. However, such a description is not a limitation, and various modifications can be made.
　本発明は、制御弁式鉛蓄電池を用いた場合において有用である。 The present invention is useful when a control valve type lead-acid battery is used.
１　　極板群
１ａ　　正極
１ｂ　　負極
１ｃ　　セパレータ
２ａ　　正極ストラップ
２ｂ　　負極ストラップ
４ａ　　正極柱
４ｂ　　負極柱
５，１５　　蓋
５ａ　　正極端子
５ｂ　　負極端子
６ａ，１６ａ　　下面部
６ｂ　　突出部
６ｃ，１６ｃ　　周縁部分
７，１７，２７　　樹脂膜
８　　電槽 DESCRIPTION OF SYMBOLS 1 Electrode group 1a Positive electrode 1b Negative electrode 1c Separator 2a Positive electrode strap 2b Negative electrode strap 4a Positive electrode column 4b Negative electrode column 5,15 Lid 5a Positive electrode terminal 5b Negative electrode terminal 6a, 16a Lower surface part 6b Protrusion part 6c, 16c Peripheral part 7,17,27 Resin film 8 Battery case

Claims (3)

  1. 複数の正極と、複数の負極と、前記複数の正極のそれぞれと前記複数の負極のそれぞれとの間に各々介在する複数のセパレータとを有する極板群と、
    前記極板群を収容するセル室を有する樹脂製の電槽と、
    前記複数の正極に接続された正極ストラップと、
    前記複数の負極に接続された負極ストラップと、
    前記正極ストラップに接続された正極柱と、
    前記負極ストラップに接続された負極柱と、
    前記正極柱に接続された正極端子と、
    前記負極柱に接続された負極端子と、
    前記電槽の開口部を封じるとともに、前記正極端子および前記負極端子をインサート成型により埋設した樹脂製の蓋と、を備え、
    前記正極端子および前記負極端子は、前記蓋の外面よりも前記蓋の内部に位置する下面部と、前記蓋の前記外面から突出した突出部とを有し、
    前記下面部の全面と、前記蓋における前記下面部の周縁部分とを覆う樹脂膜が設けられ、前記樹脂膜の前記下面部上における最大厚さが、前記周縁部分における最大厚さよりも大きい、
    鉛蓄電池。     An electrode plate group having a plurality of positive electrodes, a plurality of negative electrodes, and a plurality of separators interposed between each of the plurality of positive electrodes and each of the plurality of negative electrodes;
    A resin battery case having a cell chamber for accommodating the electrode plate group;
    A positive strap connected to the plurality of positive electrodes;
    A negative electrode strap connected to the plurality of negative electrodes;
    A positive pole connected to the positive strap;
    A negative pole connected to the negative strap;
    A positive electrode terminal connected to the positive electrode column;
    A negative terminal connected to the negative pole;
    A resin lid that seals the opening of the battery case and embeds the positive electrode terminal and the negative electrode terminal by insert molding;
    The positive electrode terminal and the negative electrode terminal have a lower surface portion located inside the lid rather than an outer surface of the lid, and a protruding portion protruding from the outer surface of the lid,
    A resin film is provided to cover the entire surface of the lower surface portion and a peripheral portion of the lower surface portion of the lid, and the maximum thickness of the resin film on the lower surface portion is larger than the maximum thickness of the peripheral portion.
    Lead acid battery.
  2. 前記極板群と、前記正極ストラップと、前記負極ストラップとをそれぞれ同じ数で複数備え、
    前記電槽は前記複数の極板群をそれぞれ収容する複数の前記セル室を有し、
    前記複数の極板群のうちの隣接する２つはいずれも前記正極ストラップと前記負極ストラップとを介して直列接続されることで、前記複数の極板群は直列接続され、
    前記複数の正極ストラップのうち、前記負極ストラップに接続されていない正極ストラップが前記正極柱に接続され、
    前記複数の負極ストラップのうち、前記正極ストラップに接続されていない負極ストラップが前記負極柱に接続されている、
    請求項１に記載の鉛蓄電池。     The electrode plate group, the positive straps, and the negative straps are each provided in the same number,
    The battery case has a plurality of the cell chambers that respectively accommodate the plurality of electrode plate groups,
    Two adjacent ones of the plurality of electrode plate groups are connected in series via the positive electrode strap and the negative electrode strap, so that the plurality of electrode plate groups are connected in series,
    Among the plurality of positive straps, a positive strap not connected to the negative strap is connected to the positive pole,
    Among the plurality of negative straps, a negative strap not connected to the positive strap is connected to the negative pole,
    The lead acid battery according to claim 1.
  3. 前記正極端子の前記突出部は、前記正極柱の直上からずれており、前記負極端子の前記突出部は、前記負極柱の直上からずれている、
    請求項１に記載の鉛蓄電池。     The protruding portion of the positive terminal is offset from directly above the positive pole, and the protruding portion of the negative terminal is offset from immediately above the negative pole.
    The lead acid battery according to claim 1.
PCT/JP2015/003354 2014-07-23 2015-07-03 Lead storage battery WO2016013163A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4278742A (en) * 1980-05-05 1981-07-14 General Battery Corporation Manifold vented battery cover
JPH05205710A (en) * 1992-01-30 1993-08-13 Matsushita Electric Ind Co Ltd Sealed lead-acid battery
JP2008140578A (en) * 2006-11-30 2008-06-19 Shin Kobe Electric Mach Co Ltd Manufacturing method of mono block type lead acid storage battery
JP2012028202A (en) * 2010-07-26 2012-02-09 Panasonic Corp Lead-acid storage battery
JP2013058355A (en) * 2011-09-07 2013-03-28 Gs Yuasa Corp Manufacturing method of storage battery and storage battery

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4278742A (en) * 1980-05-05 1981-07-14 General Battery Corporation Manifold vented battery cover
JPH05205710A (en) * 1992-01-30 1993-08-13 Matsushita Electric Ind Co Ltd Sealed lead-acid battery
JP2008140578A (en) * 2006-11-30 2008-06-19 Shin Kobe Electric Mach Co Ltd Manufacturing method of mono block type lead acid storage battery
JP2012028202A (en) * 2010-07-26 2012-02-09 Panasonic Corp Lead-acid storage battery
JP2013058355A (en) * 2011-09-07 2013-03-28 Gs Yuasa Corp Manufacturing method of storage battery and storage battery

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