WO2011078211A1 - Lid for storage battery, injection-molding method for the lid for storage battery, and storage battery with the lid for storage battery - Google Patents

Lid for storage battery, injection-molding method for the lid for storage battery, and storage battery with the lid for storage battery Download PDF

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Publication number
WO2011078211A1
WO2011078211A1 PCT/JP2010/073097 JP2010073097W WO2011078211A1 WO 2011078211 A1 WO2011078211 A1 WO 2011078211A1 JP 2010073097 W JP2010073097 W JP 2010073097W WO 2011078211 A1 WO2011078211 A1 WO 2011078211A1
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WO
WIPO (PCT)
Prior art keywords
lid
terminal
bushing
synthetic resin
storage battery
Prior art date
Application number
PCT/JP2010/073097
Other languages
French (fr)
Japanese (ja)
Inventor
洋志 春山
大崎　信
英次 北條
恭秀 中山
Original Assignee
株式会社Ｇｓユアサ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ｇｓユアサ filed Critical 株式会社Ｇｓユアサ
Publication of WO2011078211A1 publication Critical patent/WO2011078211A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14639—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles for obtaining an insulating effect, e.g. for electrical components
    • 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
    • H01M50/564—Terminals characterised by their manufacturing process
    • 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
    • H01M50/112—Monobloc comprising multiple compartments
    • 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
    • H01M50/50—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3468—Batteries, accumulators or fuel cells
    • 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 storage battery particularly suitable for mounting on a motorcycle, and more particularly to a storage battery lid, a storage battery lid injection molding method, and a storage battery including the storage battery lid.
  • the above-mentioned storage battery suitable for mounting on a motorcycle is provided with a cylindrical bushing that is welded by inserting a pole column protruding upward from the battery case side, and the horizontal front side from the bushing.
  • a compact storage battery can be configured in the vertical direction in which the terminal does not protrude from the lid.
  • the notch part 3 or the recessed part is formed in the synthetic resin lid 2 for closing a battery case, and the terminal 4 is provided in the notch part 3 or the recessed part.
  • a cylindrical bushing 6 that extends from the battery case and is welded by inserting a pole 5 for taking out electric power is provided in the lid 2, and a terminal that is juxtaposed in the horizontal direction with the upper side of the bushing 6 and the bushing 6. 4, in a storage battery comprising an auxiliary lid 9 for covering the bushing 6 provided in the lid 2 from above, the terminal 4, the bushing 6 and the conduction portion 7.
  • Patent Document 2 states that “the first convex portion 13A in which the lower ends of the terminals 20 and 30 are embedded, and the first convex portion 13A are located on both sides in the longitudinal direction, and the The first convex portion 13A includes a second convex portion 13B having an upper surface 13b protruding above the upper surface 13a and a third convex portion 13C having the same upper surface 13c "(paragraph [0044], FIG. 13), By providing the one convex portion 13A on the upper surface, the lower end 100Z of the lid 100 can hardly be bent on the terminal 20 side, and as described above, the nut 140 is inserted into the left terminal 20, for example, and then inserted.
  • the second and third convex portions 13B and 13C are slid by placing nuts on the upper surface thereof and dropping them into the inside from the opening of the terminal.
  • the problem that it becomes difficult to insert the nut due to the above-described deformation is avoided.
  • the height dimension and the formation range in plan view are determined with respect to the dimension L in FIG. Well, it is not limited to what is shown in the figure "(paragraphs [0051], [0052], FIG. 13, FIG. 17), and according to a storage battery in which such protrusions are formed, to some extent Although the deformation of the lid can be suppressed, it was not sufficient.
  • the present invention is intended to solve the above-described problems, and is provided with a storage battery lid and a storage battery lid capable of suppressing deformation of a lid in which a terminal portion is insert-molded, particularly warpage of a short side surface of the lid. It is an object of the present invention to provide an injection molding method and a storage battery including the storage battery lid.
  • a notch or recess is formed in a synthetic resin lid for closing the battery case, a terminal is provided in the notch or recess, a bushing is provided in the lid, an upper side of the bushing, A conductive portion that connects the bushing and the lower side of the terminal juxtaposed in the horizontal direction, the terminal portion is configured by the terminal, the bushing, and the conductive portion, and at least the lower side of the bushing of the terminal portion
  • the lower portion in which the bushing on the back side of the lid is embedded in the synthetic resin and the conductive portion are embedded in the synthetic resin.
  • a lid for a storage battery characterized in that a thin plate made of the synthetic resin is provided in a gap between the two portions.
  • the bushing has a cylindrical shape that is welded by inserting pole columns extending from the electrode plate group in the battery case, and the terminal portion is a terminal, a bushing, and a continuity that connects the two.
  • the part is formed by integral molding.
  • a notch is formed in a synthetic resin lid for closing the battery case, a terminal is provided in the notch, a bushing is provided in the lid, an upper side of the bushing, the bushing, A conductive portion that connects the lower side of the terminals juxtaposed in the horizontal direction, the terminal portion is configured by the terminal, the bushing, and the conductive portion, and at least the lower portion of the bushing and the conductive portion;
  • the notch A cover for a storage battery characterized in that the synthetic resin thin plate projecting in a triangular shape is provided.
  • a terminal portion including a terminal having a hollow portion, a bushing, an upper side of the bushing, and a lower portion side of the terminal juxtaposed in the horizontal direction with the bushing,
  • the lid is inserted into a molding die, and a synthetic resin is injection-molded so that at least a lower portion of the terminal portion of the terminal portion and the conductive portion are embedded in the lid. Injection molding so that a thin plate of the synthetic resin is formed between the lower portion where the bushing on the back side is embedded in the synthetic resin and the gap between the portion where the conductive portion is embedded in the synthetic resin.
  • the synthetic resin forming the thin plate is solidified faster than the synthetic resin in the vicinity thereof, and the thin plate supports the synthetic resin at both ends thereof and suppresses shrinkage of the synthetic resin.
  • the synthetic resin is placed so that the vertical plate part separating the bushing and the terminal rises upward from the bottom surface of the plate, and the triangular thin plate projects toward the notch portion having the terminal at the lower part of the short side surface thereof.
  • It is an injection molding method of a lid for a storage battery, characterized in that deformation of the lid is suppressed by solidifying and shrinking the synthetic resin that is formed by injection molding to form the triangular thin plate.
  • (6) The method for injection molding a storage battery lid according to (4) or (5), wherein a nut is inserted into the cavity of the terminal when the synthetic resin is injection molded.
  • a storage battery including a synthetic resin battery case in which a partition is partitioned into a plurality of cells by a partition wall and an electrode plate group is accommodated in each cell, and a synthetic resin cover that covers the battery case from above And a storage battery lid according to any one of (1) to (3).
  • the storage battery lid according to the present invention it is possible to suppress deformation of the lid, particularly to reduce the warpage of the short side surface, so that the lid can be smoothly fitted into the battery case. It became so.
  • FIG. 1 shows a perspective view of the storage battery of the present invention.
  • the storage battery 10 includes a battery case 1 having a rectangular shape in plan view, a lid 2 made of synthetic resin having a rectangular shape in plan view for closing the upper end opening of the battery case 1, and an auxiliary for closing the upper end opening of the lid 2. And a lid 9.
  • cutout portions 3 are formed at two corners on both sides of one long side of the lid 2, respectively.
  • 3 and 3 are arranged with terminals 4 and 4 constituting the positive electrode and the negative electrode (the right terminal is the positive terminal and the left terminal is the negative terminal), respectively, and the terminals 4 and 4 rather than the upper end 2A of the lid 2.
  • the upper surfaces 4a and 4a of the upper surface plate portions 4A and 4A are prevented from protruding.
  • the terminals 4 and 4 are arranged in the notches 3 and 3 formed in the corners of the lid 2, but in the lid of the present invention (1) described above, the portion entering the inside of the lid 2 is arranged. You may form a recessed part and arrange
  • the bushings 6 and 6 (under the auxiliary lid 9 in FIG. 1) of the rectangular plate 2 ⁇ / b> C in a plan view that is raised upward from the bottom surface 2 ⁇ / b> B of the lid 2.
  • a thin plate 2D made of a synthetic resin projecting in a triangular shape toward the notch 3 is provided at the lower portion on the short side of the vertical plate that separates the terminals 4 and 4 from each other. As will be described later, warping of the short side surface is suppressed by the synthetic resin thin plate 2D protruding in a triangular shape.
  • the lower portion 6B in which the bushing 6 on the back side of the lid is embedded in the synthetic resin and the portion in which the conductive portion 7 is embedded in the synthetic resin.
  • a synthetic resin thin plate 2H is provided in the gap 2G to connect the lower portion 6B in which the bushing 6 is embedded in the synthetic resin and the portion in which the conductive portion 7 is embedded in the synthetic resin.
  • the thin plate 2H on the back side of the lid suppresses warping of the short side surface as will be described later.
  • the terminal 4 has a rectangular parallelepiped shape having a hollow portion, a rectangular upper surface plate portion 4A, and a rectangular front surface plate portion that hangs downward from four sides of the upper surface plate portion 4A.
  • 4B a rectangular rear plate portion 4C, a left plate portion 4D, and a right plate portion 4E, and through holes 4K1 and 4K2 for penetrating bolts are formed in the upper surface plate portion 4A and the front plate portion 4B.
  • the right plate portion 4E is formed with a square hole for inserting a nut into the hollow portion from the lateral direction.
  • the one through hole 4K1 has a rectangular shape so that the screw holes 11K1 and 11K2 of the nut communicating with the through holes 4K1 and 4K2 of the terminal 4 do not intersect each other.
  • the other through-hole 4K2 is formed at a position that is biased to the right of the rectangular shape.
  • the nut 11 to be inserted into the cavity of the terminal 4 has a rectangular parallelepiped shape, and the nut 11 has two portions 11K1 where the screw holes are directed from the upper surface to the lower surface of the rectangular shape and a portion 11K2 which is directed from the front surface to the rear surface of the rectangular shape. Form in place. At this time, the two screw holes 11K1 and 11K2 are formed so that one screw hole is offset to the left of the rectangular shape and the other screw hole is offset to the right of the rectangular shape so as not to cross each other.
  • the nut 11 is connected to the hollow portion of the terminal 4 so that the terminal through hole 4K1 and the nut screw hole 11K1 and the terminal through hole 4K2 and the nut screw hole 11K2 communicate with each other.
  • a bolt (not shown) is inserted from one or both of the through hole 4K1 on the upper surface and the front surface 4K2, and the tip of the bolt is screwed into the nut.
  • external lead wires (wires that can be connected to electrical components or the like) that are not shown are sandwiched and fixed between these bolts and nuts.
  • the basic structure of the lid for a storage battery of the present invention is the same as the conventional one shown in FIG.
  • the structure of the storage battery lid of the present invention will be described below with reference to FIG.
  • a cylindrical bushing 6 extending from an electrode plate group (not shown) of the battery case 1 and having a pole column 5 for taking out electric power is inserted and welded is provided inside the lid 2.
  • a conducting part 7 for connecting the upper side of the bushing 6 and the lower side of the terminal 4 juxtaposed in the horizontal direction with the bushing 6 is provided, and the terminal 4, the bushing 6 and the conducting part 7 are connected to lead or lead.
  • the terminal portion 8 is formed by integrally molding with an alloy.
  • 3A shown in FIG. 3 is a strap integrated with the lower end of the pole 5.
  • a black-colored portion B shown in the figure shows a welded portion where the bushing 6 and the pole column 5 are burner welded, which is advantageous in terms of strength as compared with soldering.
  • auxiliary lid 9 for covering the bushing 6 provided in the lid 2 from above, that is, closing the opening of the upper end 2A of the lid 2 is provided.
  • the auxiliary lid 9 can be fixed in a state where the opening of the lid 2 is hermetically sealed by covering the lid 2 after the lower side of the auxiliary lid 9 is thermally melted.
  • the skirt portion 9S of the auxiliary lid 9 is inserted into the groove 2M and the rib 9R (9r) of the auxiliary lid 9 is inserted into the rib of the lid 2
  • the rib 9R (9r) of the auxiliary lid 9 is welded to the rib 2R (2r) of the lid 2 so that the inside surrounded by the ribs 9R (9r) and 2R (2r) is sealed.
  • the lower part 6B excluding the upper part 6A of the bushing 6 in the terminal part 8 and the conductive part 7 are embedded in the lid 2 by insert molding.
  • the vertical plate portion 7B of the conducting portion 7 is covered with the bulging portions 2F and 2F bulging from the vertical plate portion 2C of the lid 2 toward the terminal 4 side.
  • the bushing 6 is preferably insert-molded on the lid 2 and further provided with a plurality of annular protrusions 6T on the outside of the bushing 6 along the vertical direction. By doing so, it becomes difficult for the electrolytic solution from the storage battery 10 to move into the space K of the upper lid 2 from between the bushing 6 and the lid 2, but by any chance the electrolytic solution is between the bushing 6 and the lid 2. Since the inside surrounded by the ribs 9R (9r) and 2R (2r) is sealed, the surface of the auxiliary lid 9 (outside of the storage battery 10) It is difficult to leak.
  • the conducting portion 7 includes a first horizontal plate portion 7A extending in the horizontal direction from the upper portion of the bushing 6, a vertical plate portion 7B hanging downward from an end portion of the first horizontal plate portion 7A, and the vertical plate portion 7B. 2C, and a second horizontal plate portion 7C extending in the horizontal direction from the lower end of the terminal 4 and connected to the lower portion of the terminal 4. It may be provided with a predetermined interval).
  • the electrolyte 7 having moved into the space K above the lid 2 moves between the conducting portion 7 and the bulging portion 2F of the lid 2 and moves to the terminal 4 so that the protrusion 7T, It becomes possible to prevent more reliably at 7T.
  • the protrusion 7T is for preventing the electrolyte from moving to the terminal 4 as described above. Therefore, the protrusion 7T may have a shape that can increase the creeping distance, for example, an annular recess. You may combine a recessed part and the said cyclic
  • the lid for a storage battery includes a terminal 4 having a hollow portion, a cylindrical bushing 6 into which a pole 5 extending from an electrode plate group in the battery case is inserted and welded, an upper side of the bushing 6 and the terminal 4.
  • the terminal portion 8 as described above, which is formed by integrally molding the conducting portion 7 that connects to the lower side of the terminal, is inserted into the cavity of the terminal 4 by insert molding, and its manufacturing method Is as follows.
  • the terminal part 8 is produced by integrally molding the terminal 4, the bushing 6 and the conducting part 7 by adopting a lead or lead alloy casting method.
  • the rectangular parallelepiped terminal 4 has a hollow portion, and the through holes 4K1 and 4K2 are formed in the terminal 4 at positions offset to the left and right of the rectangular upper surface plate portion 4A and the rectangular front surface plate portion 4B. It is preferable to cast lead or a lead alloy using a mold.
  • the terminal 4 is not limited to a rectangular parallelepiped, and the left and right shapes are not necessarily the same, and the position of the through hole 4K1 in the upper surface plate portion 4A and the position of the through hole 4K2 in the front surface plate portion 4B are also illustrated. It is not limited to what was done.
  • As the lead alloy a Pb—Ca—Sn alloy, a Pb—Sn alloy, a Pb—Ca alloy, a Pb—Sb alloy, or the like can be used.
  • the nut 11 having two screw holes in the hollow portion of the terminal 4 having two through holes,
  • the terminal through-hole 4K1 and the nut screw hole 11K1, and the terminal through-hole 4K2 and the nut screw hole 11K2 are inserted so as to communicate with each other.
  • the terminal part 8 in which the nut 11 was inserted is inserted in the molding die of the lid
  • the bottom of the lead or lead alloy terminal is deformed by the injection molding pressure, and the nut 11 is fixed to the cavity of the terminal 4 to produce the storage battery lid 2 shown in FIG.
  • the lid 2 synthetic resin
  • a synthetic resin thin plate 2H is formed in the gap 2G between the lower portion 6B where the bushing 6 on the back side of the lid 2 is embedded in the synthetic resin and the portion where the conducting portion 7 is embedded in the synthetic resin.
  • the synthetic resin forming the thin plate (thin rib) 2H solidifies faster than the synthetic resin in the vicinity thereof, and the thin plate 2H acts as a slipper plate and is at both ends of the thin plate 2H.
  • the thickness of the synthetic resin in which the lower portion 6B of the bushing 6 is embedded and the thickness of the synthetic resin in which the conductive portion 7 is embedded is larger. Injection molding to make it thinner.
  • ribs 2R 'for joining to the partition walls provided at the opposite positions of the battery case 1 are provided, but a thin plate (thin rib) 2H is provided. It is necessary to make the thickness thinner than the peripheral edge portion of the lid 2 connected to the rib 2R 'or the rib 2R' so that they do not solidify faster than the thin plate (thin rib) 2H.
  • the number of thin plates (thin ribs) 2H is preferably plural. Further, as shown in FIG. 2, the thin plate (thin rib) 2H protrudes from the synthetic resin in which the lower portion 6B of the bushing 6 is embedded in the opposite direction to the synthetic resin in which the conductive portion 7 is embedded. More effective.
  • the lid 2 synthetic resin
  • the vertical plate part 2C which separates the bushings 6 and 6 and the terminals 4 and 4 from the bottom face 2B of the lid 2 rises, toward the notch part 3 provided with the terminals 4 at the lower part on the short side surface side of the vertical plate part 2C.
  • synthetic resin is injection-molded so that the triangular thin plate 2D protrudes (see FIGS. 1 and 3).
  • the synthetic resin on the back side of the lid 2 in which the terminal portion 8 is embedded is deformed into a concave shape, and the synthetic resin on the front side of the lid 2 where the terminal portion 8 is exposed is convex.
  • the solidification and contraction of the triangular thin plate 2D becomes a reaction, and the warping of the short side surface that deforms the front side of the lid 2 into a convex shape and the back side of the lid 2 into a concave shape is suppressed. Is done. Even if injection molding is performed by any of the methods of the present invention (4) or (5), the deformation of the lid can be suppressed, but if both of the present inventions (4) and (5) are used in combination, the effect is remarkable. .
  • the rectangular parallelepiped terminal 4 having a hollow portion, the bushing 6 and the conducting portion 7 are formed by integral molding.
  • Through holes 4K1 and 4K2 are formed at two locations on the rectangular upper plate and the rectangular front plate, and screw holes 11K1 and 11K2 of the nut 11 communicating with the through holes 4K1 and 4K2 of the terminal 4 intersect each other.
  • a storage battery lid is produced by insert molding in the same manner as in the past using the storage battery terminal portion formed at such a position so that the external lead wire is connected to the storage battery.
  • 11K2 is a rectangular parallelepiped nut that is formed in two locations, a location facing from the top surface to the bottom surface of the rectangular shape and a location facing from the front surface to the back surface of the rectangular shape, and not intersecting each other , Screw holes 11K1,11K2 through holes 4K1,4K2 the nut 11 of the terminal 4 so as to communicate may be battery inserted into the cavity of the pin 4.
  • one screw hole of the nut and one of the top plate part (upper surface plate part) or the front plate part (front plate part) as the through hole of the terminal to which the external lead wire is to be connected It is also possible to adopt a method in which the through hole is selected and the direction of the nut is changed and the terminal is inserted into the terminal cavity so that the selected through hole matches the screw hole of the nut.
  • a plate-like and oval anchor portion 4T can be integrally formed.
  • the anchor portion 4T may be formed separately and integrated with the lower end of the terminal 4 by welding or the like.
  • the anchor portion 4T is integrally formed at a lower end of a connecting portion 4G integrally extending downward from a flat bottom portion 4F formed integrally with the lower end of the terminal 4 in a size larger than that of the connecting portion 4G. ing.
  • the bottom portion 4F of the terminal 4 is an anchor portion having a notch in the center portion, for example, a central portion of the plate is greatly cut out, and the U-shape is eliminated from the center portion.
  • the bottom of the terminal having a small thickness corresponding to the notch is deformed.
  • the anchor portion does not cover the entire surface of the bottom of the terminal, and it is only necessary to leave a thin portion that can be deformed at the bottom of the terminal. It may have a notch, or the anchor part protrudes at least at the place excluding the central part, such as an anchor part having a hole in the central part or two rows of anchor parts having a space in the central part. That's fine.
  • the lid for a storage battery according to the present invention has a battery case of a normal lead storage battery, that is, the inside is partitioned into a plurality of cells by partition walls, each of which contains an electrode plate group and has a pole column extending from the electrode plate group. It can be applied to a battery case made of synthetic resin, and as described above, the pole 5 extending from the electrode plate group in the battery case 1 is welded to the bushing 6 of the lid 2 covered from above so that electric power can be taken out. can do.
  • the deformation of the lid in which the terminal portion is insert-molded, in particular, the warpage of the short side surface of the lid can be suppressed. It is useful for motorcycles.

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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)
  • Mechanical Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

Provided are: a lid for a storage battery, the lid having a terminal section insert-molded thereto being configured so that the lid is prevented from deforming and, particularly, so that the short side faces of the lid can be prevented from warping; an injection-molding method for the lid for a storage battery; and a storage battery provided with the lid for a storage battery. A lid for a storage battery is configured in such a manner that a cutout or a recess is formed in a synthetic resin lid (2) for closing a battery case, a terminal (4) is provided to the cutout or the recess, and a bushing (6) is provided in the lid (2). The lid is also provided with a conducting section (7) which connects the upper side of the bushing (6) and the lower side of the terminal (4) which is disposed next to the bushing (6) in the horizontal direction. The terminal (4), the bushing (6), and the conducting section (7) form a terminal section (8). The conducting section (7) and at least the lower portion (6B) of the bushing (6) from among the portions of the terminal section (8) are embedded in the lid by insert-molding. A synthetic resin thin plate (2H) is provided in the gap (2G) which is located on the rear side of the lid (2) and is formed between the lower portion (6B) of the bushing (6), the lower portion (6B) being embedded in the synthetic resin, and a portion of the conducting section (7), the portion being embedded in the synthetic resin. The thin plate (2H) connects the lower portion of the bushing (6) and the portion of the conducting section (7).

Description

蓄電池用蓋、蓄電池用蓋の射出成形方法、及びその蓄電池用蓋を備えた蓄電池Storage battery lid, storage battery lid injection molding method, and storage battery provided with the storage battery lid
　本発明は、特に自動二輪車用への搭載に適した蓄電池に関し、詳しくは、蓄電池用蓋、蓄電池用蓋の射出成形方法、及びその蓄電池用蓋を備えた蓄電池に関するものである。 The present invention relates to a storage battery particularly suitable for mounting on a motorcycle, and more particularly to a storage battery lid, a storage battery lid injection molding method, and a storage battery including the storage battery lid.
　上記の自動二輪車用への搭載に適した蓄電池は、電槽側から上方へ突出する極柱が挿入されて溶接される筒状のブッシングを蓋の内部に備えさせ、そのブッシングから水平方向前方側に形成された切欠き部に配置される端子を該ブッシングに連結することにより端子が蓋から飛び出すことがない上下方向にコンパクトな蓄電池を構成することができるようになっている。このような構成とすることで、従来と同様な大きさの蓄電池を構成した場合には、出力を従来に比べて大きくすることができる利点があり、近年用いられている構成である。 The above-mentioned storage battery suitable for mounting on a motorcycle is provided with a cylindrical bushing that is welded by inserting a pole column protruding upward from the battery case side, and the horizontal front side from the bushing. By connecting a terminal disposed in the notch formed in the housing to the bushing, a compact storage battery can be configured in the vertical direction in which the terminal does not protrude from the lid. With such a configuration, when a storage battery having the same size as the conventional one is configured, there is an advantage that the output can be increased as compared with the conventional one, which is a configuration that has been used in recent years.
　そして、このような蓄電池として、図３に示すように、電槽を閉じるための合成樹脂製の蓋２に、切欠き部３又は凹部を形成し、切欠き部３又は凹部に端子４を備え、電槽から延びる、電力を取り出すための極柱５が挿入されて溶接される筒状のブッシング６を蓋２内に備え、このブッシング６の上部側とブッシング６と水平方向で並置される端子４の下部側とを連結するための導通部７を備え、蓋２内に備えさせたブッシング６を上方から覆うための補助蓋９を備えてなる蓄電池において、端子４とブッシング６と導通部７とが一体成形により端子部８を構成するとともに、前記導通部７の側面に外側に突出する環状の突起部７Ｔを備え、端子部８のうちの少なくともブッシング６の下側部分６Ｂと該導通部７とがインサート成形により蓋２に埋め込まれているものが公知である（特許文献１参照）。 And as such a storage battery, as shown in FIG. 3, the notch part 3 or the recessed part is formed in the synthetic resin lid 2 for closing a battery case, and the terminal 4 is provided in the notch part 3 or the recessed part. A cylindrical bushing 6 that extends from the battery case and is welded by inserting a pole 5 for taking out electric power is provided in the lid 2, and a terminal that is juxtaposed in the horizontal direction with the upper side of the bushing 6 and the bushing 6. 4, in a storage battery comprising an auxiliary lid 9 for covering the bushing 6 provided in the lid 2 from above, the terminal 4, the bushing 6 and the conduction portion 7. Constitutes the terminal portion 8 by integral molding, and includes an annular protrusion 7T protruding outward on the side surface of the conducting portion 7, and at least the lower portion 6B of the bushing 6 of the terminal portion 8 and the conducting portion. 7 and insert molding Those embedded in 2 is known (see Patent Document 1).
　しかしながら、上記特許文献１の構成の蓋では、インサート成形直後の温度の高い状態から温度が低下すると、端子部８が埋め込まれた蓋２の裏側の収縮率と端子部８が露出している蓋２の表側の収縮率の違いによって、蓋の表側が凸状に、蓋の裏側が凹状に変形して、蓋と電槽との嵌合ができ難くなるという問題があった。 However, in the lid of the configuration of the above-mentioned Patent Document 1, when the temperature drops from a high temperature immediately after insert molding, the shrinkage rate on the back side of the lid 2 in which the terminal portion 8 is embedded and the lid where the terminal portion 8 is exposed. Due to the difference in shrinkage rate between the front side and the back side, the front side of the lid is deformed into a convex shape and the back side of the lid is deformed into a concave shape, which makes it difficult to fit the lid and the battery case.
　上記の問題を解決し、端子部がインサート成形された蓋体の変形を抑制することで、蓄電池の製造をスムーズに行うことを目的として、「蓋体の、各端子の上側部分が突設される箇所又はその箇所の近傍箇所あるいはそれら両方の箇所に突起部を形成した」蓄電池の発明が提案されている（特許文献２参照）。 In order to solve the above problems and suppress the deformation of the lid body in which the terminal portion is insert-molded, the production of the storage battery is performed smoothly. The invention of a storage battery has been proposed (see Patent Document 2).
　上記の突起部について、特許文献２には、「前記端子２０，３０の下端が埋設される第１凸部分１３Ａと、該第１凸部分１３Ａの一辺の長手方向両側に位置し、かつ、該第１凸部分１３Ａの上面１３ａよりも上方に突出する上面１３ｂを備える第２凸部分１３Ｂと同上面１３ｃを備える第３凸部分１３Ｃとからなり」（段落［００４４］、図１３）、「第１凸部分１３Ａを上面に備えることで、蓋体１００の下端１００Ｚが端子２０側で曲がり難くでき、上記した如く、ナット１４０を、例えば、左側の端子２０に挿入した後、挿入されたナット１４０をボルト１５０にて端子２０内にスムーズに固定できることがわかる。」、「前記第２、第３凸部分１３Ｂ，１３Ｃは、その上面にナットを配置して滑らせて端子の開口より内部に落とし込んで挿入する場合に、上記した変形によってナットが挿入できにくくなるという問題を回避するものであり、図１７（ｂ）の寸法Ｌに対してその高さ寸法及び平面視における形成範囲を定めればよく、図に示されるものに限定されるものではない。」（段落［００５１］、［００５２］、図１３、図１７）と記載され、このような突起部を形成した蓄電池によれば、ある程度、蓋の変形を抑制することはできるが、十分ではなかった。 Regarding the above-mentioned protrusion, Patent Document 2 states that “the first convex portion 13A in which the lower ends of the terminals 20 and 30 are embedded, and the first convex portion 13A are located on both sides in the longitudinal direction, and the The first convex portion 13A includes a second convex portion 13B having an upper surface 13b protruding above the upper surface 13a and a third convex portion 13C having the same upper surface 13c "(paragraph [0044], FIG. 13), By providing the one convex portion 13A on the upper surface, the lower end 100Z of the lid 100 can hardly be bent on the terminal 20 side, and as described above, the nut 140 is inserted into the left terminal 20, for example, and then inserted. It can be seen that the second and third convex portions 13B and 13C are slid by placing nuts on the upper surface thereof and dropping them into the inside from the opening of the terminal. When the nut is inserted, the problem that it becomes difficult to insert the nut due to the above-described deformation is avoided. If the height dimension and the formation range in plan view are determined with respect to the dimension L in FIG. Well, it is not limited to what is shown in the figure "(paragraphs [0051], [0052], FIG. 13, FIG. 17), and according to a storage battery in which such protrusions are formed, to some extent Although the deformation of the lid can be suppressed, it was not sufficient.
特開２００９－０４３４４１号公報JP 2009-043441 A ＷＯ ２００９／１３１２２８ Ａ１WO 2009/131228 A1
　本発明は、上記のような問題を解決しようとするものであり、端子部がインサート成形された蓋の変形、特に蓋の短側面の反りを抑制することができる蓄電池用蓋、蓄電池用蓋の射出成形方法、及びその蓄電池用蓋を備えた蓄電池を提供することを課題とする。 The present invention is intended to solve the above-described problems, and is provided with a storage battery lid and a storage battery lid capable of suppressing deformation of a lid in which a terminal portion is insert-molded, particularly warpage of a short side surface of the lid. It is an object of the present invention to provide an injection molding method and a storage battery including the storage battery lid.
　本発明は、上記課題を解決するために、以下の手段を採用する。
（１）電槽を閉じるための合成樹脂製の蓋に、切欠き部又は凹部を形成し、前記切欠き部又は凹部に端子を備え、ブッシングを前記蓋内に備え、前記ブッシングの上部側と、前記ブッシングと水平方向で並置される前記端子の下部側とを連結する導通部を備え、前記端子とブッシングと導通部より端子部を構成するとともに、前記端子部のうちの少なくともブッシングの下側部分と前記導通部とがインサート成形により前記蓋に埋め込まれた蓄電池用蓋において、前記蓋の裏側における前記ブッシングが前記合成樹脂に埋め込まれた下側部分と前記導通部が前記合成樹脂に埋め込まれた部分の隙間に、両者をつなぐ前記合成樹脂製の薄板が設けられていることを特徴とする蓄電池用蓋である。
　なお、周知のように、ブッシングは、電槽内の極板群から延びる極柱が挿入されて溶接される筒状のものであり、端子部は、端子と、ブッシングと、両者を連結する導通部とが一体成形により構成される。
（２）電槽を閉じるための合成樹脂製の蓋に、切欠き部を形成し、前記切欠き部に端子を備え、ブッシングを前記蓋内に備え、前記ブッシングの上部側と、前記ブッシングと水平方向で並置される前記端子の下部側とを連結する導通部を備え、前記端子とブッシングと導通部より端子部を構成するとともに、前記端子部のうちの少なくともブッシングの下側部分と前記導通部とがインサート成形により前記蓋に埋め込まれた蓄電池用蓋において、前記蓋の底面から上方へ立ち上げた前記ブッシングと前記端子を隔てる縦板部の短側面側の下部に、前記切欠き部に向けて三角形状に張り出す前記合成樹脂製の薄板を設けたことを特徴とする蓄電池用蓋である。
（３）ナットが前記端子の空洞部に挿入されて固定されていることを特徴とする前記（１）又は（２）の蓄電池用蓋である。
（４）空洞部を有する端子と、ブッシングと、前記ブッシングの上部側と、前記ブッシングと水平方向で並置される前記端子の下部側とを連結する導通部より構成された端子部を、蓋の成形金型にインサートして、前記端子部のうちの少なくともブッシングの下側部分と前記導通部とが前記蓋に埋め込まれるように合成樹脂を射出成形する蓄電池用蓋の射出成形方法において、前記蓋の裏側における前記ブッシングが前記合成樹脂に埋め込まれる下側部分と前記導通部が前記合成樹脂に埋め込まれる部分の隙間に、両者をつなぐ前記合成樹脂の薄板が形成されるように射出成形し、前記薄板を形成する前記合成樹脂を、その近傍にある合成樹脂よりも速く凝固させ、前記薄板が、その両端の合成樹脂を支持し、該合成樹脂の収縮を抑制することにより、蓋の変形を抑制することを特徴とする蓄電池用蓋の射出成形方法である。
（５）空洞部を有する端子と、ブッシングと、前記ブッシングの上部側と、前記ブッシングと水平方向で並置される前記端子の下部側とを連結する導通部より構成された端子部を、蓋の成形金型にインサートして、前記端子部のうちの少なくともブッシングの下側部分と前記導通部とが前記蓋に埋め込まれるように合成樹脂を射出成形する蓄電池用蓋の射出成形方法において、前記蓋の底面から上方へ前記ブッシングと前記端子を隔てる縦板部が立ち上がり、その短側面側の下部に、前記端子を備える切欠き部に向けて三角形状の薄板が張り出すように、前記合成樹脂を射出成形し、前記三角形状の薄板を形成する前記合成樹脂を凝固、収縮させることにより、蓋の変形を抑制することを特徴とする蓄電池用蓋の射出成形方法である。
（６）前記合成樹脂を射出成形する際に、ナットを前記端子の空洞部に挿入することを特徴とする前記（４）又は（５）の蓄電池用蓋の射出成形方法である。
（７）隔壁によって内部が複数のセルに区画され、各セルに極板群が収納された合成樹脂製の電槽と、前記電槽を上方から被覆する合成樹脂製の蓋とを備えた蓄電池において、前記（１）～（３）のいずれか一項の蓄電池用蓋を備えたことを特徴とする蓄電池である。 The present invention employs the following means in order to solve the above problems.
(1) A notch or recess is formed in a synthetic resin lid for closing the battery case, a terminal is provided in the notch or recess, a bushing is provided in the lid, an upper side of the bushing, A conductive portion that connects the bushing and the lower side of the terminal juxtaposed in the horizontal direction, the terminal portion is configured by the terminal, the bushing, and the conductive portion, and at least the lower side of the bushing of the terminal portion In a storage battery lid in which a portion and the conductive portion are embedded in the lid by insert molding, the lower portion in which the bushing on the back side of the lid is embedded in the synthetic resin and the conductive portion are embedded in the synthetic resin. A lid for a storage battery, characterized in that a thin plate made of the synthetic resin is provided in a gap between the two portions.
As is well known, the bushing has a cylindrical shape that is welded by inserting pole columns extending from the electrode plate group in the battery case, and the terminal portion is a terminal, a bushing, and a continuity that connects the two. The part is formed by integral molding.
(2) A notch is formed in a synthetic resin lid for closing the battery case, a terminal is provided in the notch, a bushing is provided in the lid, an upper side of the bushing, the bushing, A conductive portion that connects the lower side of the terminals juxtaposed in the horizontal direction, the terminal portion is configured by the terminal, the bushing, and the conductive portion, and at least the lower portion of the bushing and the conductive portion; In the storage battery lid embedded in the lid by insert molding, in the lower portion on the short side surface of the vertical plate portion separating the bushing and the terminal raised from the bottom surface of the lid, the notch A cover for a storage battery, characterized in that the synthetic resin thin plate projecting in a triangular shape is provided.
(3) The storage battery cover according to (1) or (2), wherein a nut is inserted and fixed in the cavity of the terminal.
(4) A terminal portion including a terminal having a hollow portion, a bushing, an upper side of the bushing, and a lower portion side of the terminal juxtaposed in the horizontal direction with the bushing, In the injection molding method for a storage battery lid, the lid is inserted into a molding die, and a synthetic resin is injection-molded so that at least a lower portion of the terminal portion of the terminal portion and the conductive portion are embedded in the lid. Injection molding so that a thin plate of the synthetic resin is formed between the lower portion where the bushing on the back side is embedded in the synthetic resin and the gap between the portion where the conductive portion is embedded in the synthetic resin. The synthetic resin forming the thin plate is solidified faster than the synthetic resin in the vicinity thereof, and the thin plate supports the synthetic resin at both ends thereof and suppresses shrinkage of the synthetic resin. By a method of injection molding the lid for a storage battery which comprises suppressing the deformation of the lid.
(5) A terminal portion including a terminal having a hollow portion, a bushing, an upper side of the bushing, and a lower portion side of the terminal juxtaposed in the horizontal direction with the bushing, In the injection molding method for a storage battery lid, the lid is inserted into a molding die, and a synthetic resin is injection-molded so that at least a lower portion of the terminal portion of the terminal portion and the conductive portion are embedded in the lid. The synthetic resin is placed so that the vertical plate part separating the bushing and the terminal rises upward from the bottom surface of the plate, and the triangular thin plate projects toward the notch portion having the terminal at the lower part of the short side surface thereof. It is an injection molding method of a lid for a storage battery, characterized in that deformation of the lid is suppressed by solidifying and shrinking the synthetic resin that is formed by injection molding to form the triangular thin plate.
(6) The method for injection molding a storage battery lid according to (4) or (5), wherein a nut is inserted into the cavity of the terminal when the synthetic resin is injection molded.
(7) A storage battery including a synthetic resin battery case in which a partition is partitioned into a plurality of cells by a partition wall and an electrode plate group is accommodated in each cell, and a synthetic resin cover that covers the battery case from above And a storage battery lid according to any one of (1) to (3).
　本発明における蓄電池用蓋を採用することにより、蓋の変形を抑制、特に短側面の反りを低減することができるようになったので、蓋と電槽との嵌合をスムーズに行うことができるようになった。 By adopting the storage battery lid according to the present invention, it is possible to suppress deformation of the lid, particularly to reduce the warpage of the short side surface, so that the lid can be smoothly fitted into the battery case. It became so.
本発明の蓄電池の斜視図である。It is a perspective view of the storage battery of the present invention. 本発明の蓄電池用蓋の裏側の構造を示す蓋の底面図である。It is a bottom view of the lid | cover which shows the structure of the back side of the lid | cover for storage batteries of this invention. 従来の補助蓋が装着された蓋に埋設された端子部の断面図である。It is sectional drawing of the terminal part embed | buried under the lid | cover with which the conventional auxiliary | assistant lid | cover was mounted | worn.
　図１に、本発明の蓄電池の斜視図を示す。この蓄電池１０は、平面視矩形状の電槽１と、この電槽１の上端開口を閉じるための平面視矩形状の合成樹脂製の蓋２と、この蓋２の上端開口を閉じるための補助蓋９とを備えている。 FIG. 1 shows a perspective view of the storage battery of the present invention. The storage battery 10 includes a battery case 1 having a rectangular shape in plan view, a lid 2 made of synthetic resin having a rectangular shape in plan view for closing the upper end opening of the battery case 1, and an auxiliary for closing the upper end opening of the lid 2. And a lid 9.
　図１に示すように、長方形状の蓋２の４つの角部のうち、蓋２の一方の長辺の両側となる２つの角部にそれぞれ、切欠き部３を形成し、それら切欠き部３，３に正極及び負極を構成する端子４，４（右側の端子が正極端子で左側の端子が負極端子になっている）をそれぞれ配置して、蓋２の上端２Ａよりも端子４，４の上面板部４Ａ，４Ａの上面４ａ，４ａが突出することがないようにしている。ここでは、端子４，４を蓋２の角部に形成した切欠き部３，３に配置しているが、上記の本発明（１）の蓋においては、蓋２の内側に入り込んだ部分に凹部を形成して、それら形成した凹部のそれぞれに、端子４，４を配置してもよい。 As shown in FIG. 1, of the four corners of the rectangular lid 2, cutout portions 3 are formed at two corners on both sides of one long side of the lid 2, respectively. 3 and 3 are arranged with terminals 4 and 4 constituting the positive electrode and the negative electrode (the right terminal is the positive terminal and the left terminal is the negative terminal), respectively, and the terminals 4 and 4 rather than the upper end 2A of the lid 2. The upper surfaces 4a and 4a of the upper surface plate portions 4A and 4A are prevented from protruding. Here, the terminals 4 and 4 are arranged in the notches 3 and 3 formed in the corners of the lid 2, but in the lid of the present invention (1) described above, the portion entering the inside of the lid 2 is arranged. You may form a recessed part and arrange | position the terminals 4 and 4 in each of the formed recessed part.
　上記の本発明（２）の蓋においては、蓋２の底面２Ｂから上方へ立ち上げた平面視矩形状の縦板部２Ｃのうち、ブッシング６，６（図１においては補助蓋９の下に隠れている）と端子４，４を隔てる縦板部の短側面側の下部に、切欠き部３に向けて三角形状に張り出す合成樹脂製の薄板２Ｄを設けたことを特徴とする。この三角形状に張り出す合成樹脂製の薄板２Ｄにより、後述するように、短側面の反りが抑制される。 In the above-described lid of the present invention (2), the bushings 6 and 6 (under the auxiliary lid 9 in FIG. 1) of the rectangular plate 2 </ b> C in a plan view that is raised upward from the bottom surface 2 </ b> B of the lid 2. A thin plate 2D made of a synthetic resin projecting in a triangular shape toward the notch 3 is provided at the lower portion on the short side of the vertical plate that separates the terminals 4 and 4 from each other. As will be described later, warping of the short side surface is suppressed by the synthetic resin thin plate 2D protruding in a triangular shape.
　また、上記の本発明（１）の蓋においては、図２に示すように、蓋の裏側におけるブッシング６が合成樹脂に埋め込まれた下側部分６Ｂと導通部７が合成樹脂に埋め込まれた部分の隙間２Ｇに、ブッシング６が合成樹脂に埋め込まれた下側部分６Ｂと導通部７が合成樹脂に埋め込まれた部分をつなぐ合成樹脂製の薄板２Ｈが設けられていることを特徴とする。この蓋の裏側の薄板２Ｈにより、後述するように、短側面の反りが抑制される。 In the lid of the present invention (1), as shown in FIG. 2, the lower portion 6B in which the bushing 6 on the back side of the lid is embedded in the synthetic resin and the portion in which the conductive portion 7 is embedded in the synthetic resin. A synthetic resin thin plate 2H is provided in the gap 2G to connect the lower portion 6B in which the bushing 6 is embedded in the synthetic resin and the portion in which the conductive portion 7 is embedded in the synthetic resin. The thin plate 2H on the back side of the lid suppresses warping of the short side surface as will be described later.
　図１に示すように、端子４は、空洞部を有する直方体状であり、長方形状の上面板部４Ａと、この上面板部４Ａの４辺から下方へ垂下している長方形状の前面板部４Ｂと、長方形状の後板部４Ｃと、左板部４Ｄ、右板部４Ｅとを備え、上面板部４Ａと前面板部４Ｂには、ボルトを貫通させるための貫通孔４Ｋ１，４Ｋ２が形成され、右板部４Ｅには、空洞部にナットを横方向から挿入するための四角孔が形成されている。このとき、端子４の空洞部にナット１１を挿入した場合、端子４の貫通孔４Ｋ１，４Ｋ２と連通するナットのネジ孔１１Ｋ１，１１Ｋ２が互いに交差しないように、一方の貫通孔４Ｋ１は長方形状の左に、他方の貫通孔４Ｋ２は長方形状の右に偏った位置に形成する。 As shown in FIG. 1, the terminal 4 has a rectangular parallelepiped shape having a hollow portion, a rectangular upper surface plate portion 4A, and a rectangular front surface plate portion that hangs downward from four sides of the upper surface plate portion 4A. 4B, a rectangular rear plate portion 4C, a left plate portion 4D, and a right plate portion 4E, and through holes 4K1 and 4K2 for penetrating bolts are formed in the upper surface plate portion 4A and the front plate portion 4B. The right plate portion 4E is formed with a square hole for inserting a nut into the hollow portion from the lateral direction. At this time, when the nut 11 is inserted into the cavity of the terminal 4, the one through hole 4K1 has a rectangular shape so that the screw holes 11K1 and 11K2 of the nut communicating with the through holes 4K1 and 4K2 of the terminal 4 do not intersect each other. On the left, the other through-hole 4K2 is formed at a position that is biased to the right of the rectangular shape.
　また、端子４の空洞部に挿入するナット１１も直方体状とし、そのナット１１に、ネジ孔を長方形状の上面から下面に向けた箇所１１Ｋ１及び長方形状の前面から背面に向けた箇所１１Ｋ２の２箇所に形成する。このとき、２箇所のネジ孔１１Ｋ１，１１Ｋ２は、互いに交差しないように、一方のネジ孔は長方形状の左に、他方のネジ孔は長方形状の右に偏った位置に形成する。
　このような端子部及び端子用ナットを採用し、端子の貫通孔４Ｋ１とナットのネジ孔１１Ｋ１、端子の貫通孔４Ｋ２とナットのネジ孔１１Ｋ２が連通するように、端子４の空洞部にナット１１を挿入して、図１に示す蓄電池１０とすることにより、ボルト（図示せず）を上面の貫通孔４Ｋ１及び前面の４Ｋ２のいずれか一方又は両方から挿入し、ボルトの先端をナットに螺合させることができる。そして、これらボルトとナットの間に、図示していない外部リード線（電装品等に接続可能な線）等を挟み込んで固定する。 The nut 11 to be inserted into the cavity of the terminal 4 has a rectangular parallelepiped shape, and the nut 11 has two portions 11K1 where the screw holes are directed from the upper surface to the lower surface of the rectangular shape and a portion 11K2 which is directed from the front surface to the rear surface of the rectangular shape. Form in place. At this time, the two screw holes 11K1 and 11K2 are formed so that one screw hole is offset to the left of the rectangular shape and the other screw hole is offset to the right of the rectangular shape so as not to cross each other.
By adopting such a terminal portion and a terminal nut, the nut 11 is connected to the hollow portion of the terminal 4 so that the terminal through hole 4K1 and the nut screw hole 11K1 and the terminal through hole 4K2 and the nut screw hole 11K2 communicate with each other. Is inserted into the storage battery 10 shown in FIG. 1, and a bolt (not shown) is inserted from one or both of the through hole 4K1 on the upper surface and the front surface 4K2, and the tip of the bolt is screwed into the nut. Can be made. Then, external lead wires (wires that can be connected to electrical components or the like) that are not shown are sandwiched and fixed between these bolts and nuts.
　本発明の蓄電池用蓋の基本的な構造は、図３に示す従来のものと同様である。以下、図３に基づいて、本発明の蓄電池用蓋の構造について説明する。前記蓋２内には、前記電槽１の極板群（図示せず）から延びる、電力を取り出すための極柱５が挿入されて溶接される筒状のブッシング６が備えられている。前記ブッシング６の上部側と該ブッシング６と水平方向で並置される前記端子４の下部側とを連結するための導通部７を備え、前記端子４とブッシング６と導通部７とを鉛又は鉛合金にて一体成形することにより端子部８を構成している。図３に示す５Ａは、前記極柱５の下端に一体化されたストラップである。また、図に示す黒く塗りつぶしている部分Ｂは、前記ブッシング６と極柱５とがバーナー溶接された溶接部分を示し、半田付けに比べて強度面において有利になる。 The basic structure of the lid for a storage battery of the present invention is the same as the conventional one shown in FIG. The structure of the storage battery lid of the present invention will be described below with reference to FIG. Inside the lid 2, a cylindrical bushing 6 extending from an electrode plate group (not shown) of the battery case 1 and having a pole column 5 for taking out electric power is inserted and welded is provided. A conducting part 7 for connecting the upper side of the bushing 6 and the lower side of the terminal 4 juxtaposed in the horizontal direction with the bushing 6 is provided, and the terminal 4, the bushing 6 and the conducting part 7 are connected to lead or lead. The terminal portion 8 is formed by integrally molding with an alloy. 3A shown in FIG. 3 is a strap integrated with the lower end of the pole 5. Further, a black-colored portion B shown in the figure shows a welded portion where the bushing 6 and the pole column 5 are burner welded, which is advantageous in terms of strength as compared with soldering.
　さらに、前記蓋２内に備えさせたブッシング６を上方から覆う、つまり蓋２の上端２Ａの開口を閉じるための矩形状（長方形）の補助蓋９を備えている。この補助蓋９はそれの下側を熱溶融してから蓋２に被せることによって、蓋２の開口を密閉した状態で固着できるようになっている。すなわち、補助蓋９のリブ９Ｒ（９ｒ）の下側を熱溶融してから、補助蓋９のスカート部９Ｓを溝部２Ｍ内に入り込ませるとともに補助蓋９のリブ９Ｒ（９ｒ）を蓋２のリブ２Ｒ（２ｒ）に押し付けることによって、補助蓋９のリブ９Ｒ（９ｒ）を蓋２のリブ２Ｒ（２ｒ）に溶着することでリブ９Ｒ（９ｒ），２Ｒ（２ｒ）によって囲まれた内側を密閉状態にすることができるようにしている。 Furthermore, a rectangular (rectangular) auxiliary lid 9 for covering the bushing 6 provided in the lid 2 from above, that is, closing the opening of the upper end 2A of the lid 2 is provided. The auxiliary lid 9 can be fixed in a state where the opening of the lid 2 is hermetically sealed by covering the lid 2 after the lower side of the auxiliary lid 9 is thermally melted. That is, after the lower side of the rib 9R (9r) of the auxiliary lid 9 is thermally melted, the skirt portion 9S of the auxiliary lid 9 is inserted into the groove 2M and the rib 9R (9r) of the auxiliary lid 9 is inserted into the rib of the lid 2 By pressing against the rib 2R (2r), the rib 9R (9r) of the auxiliary lid 9 is welded to the rib 2R (2r) of the lid 2 so that the inside surrounded by the ribs 9R (9r) and 2R (2r) is sealed. To be able to.
　前記端子部８のうちのブッシング６の上側部分６Ａを除いた下側部分６Ｂと導通部７とがインサート成形により前記蓋２に埋め込まれている。前記蓋２の縦板部２Ｃから端子４側へ膨出した膨出部２Ｆ，２Ｆにて導通部７の縦板部７Ｂが覆われている。前記のようにブッシング６が蓋２にインサート成形され、さらにブッシング６の外側に上下方向に沿って複数の環状の突起部６Ｔを備えるようにすることが好ましい。そうすることにより、蓄電池１０からの電解液がブッシング６と蓋２との間から上方の蓋２の空間Ｋ内に移動し難くなるが、万一その電解液がブッシング６と蓋２との間から上方の蓋２の空間Ｋ内に移動してきたとしても、リブ９Ｒ（９ｒ），２Ｒ（２ｒ）によって囲まれた内側を密閉状態にしているから、補助蓋９の表面（蓄電池１０の外部）に漏出し難い。 The lower part 6B excluding the upper part 6A of the bushing 6 in the terminal part 8 and the conductive part 7 are embedded in the lid 2 by insert molding. The vertical plate portion 7B of the conducting portion 7 is covered with the bulging portions 2F and 2F bulging from the vertical plate portion 2C of the lid 2 toward the terminal 4 side. As described above, the bushing 6 is preferably insert-molded on the lid 2 and further provided with a plurality of annular protrusions 6T on the outside of the bushing 6 along the vertical direction. By doing so, it becomes difficult for the electrolytic solution from the storage battery 10 to move into the space K of the upper lid 2 from between the bushing 6 and the lid 2, but by any chance the electrolytic solution is between the bushing 6 and the lid 2. Since the inside surrounded by the ribs 9R (9r) and 2R (2r) is sealed, the surface of the auxiliary lid 9 (outside of the storage battery 10) It is difficult to leak.
　前記導通部７が、前記ブッシング６の上部から水平方向に延びる第１水平板部７Ａと、この第１水平板部７Ａの端部から下方へ垂下する縦板部７Ｂと、この縦板部７Ｂの下端から水平方向へ延びて前記端子４の下部に接続される第２水平板部７Ｃとからなり、縦板部７Ｂの中央部付近に外側に突出する環状の突起部７Ｔを２個（１個又は３個以上でもよい）所定間隔を隔てて備えるようにしてもよい。この場合、前述のように、蓋２の上部の空間Ｋ内に移動してきた電解液が導通部７と蓋２の膨出部２Ｆの間を通って端子４に移動することを突起部７Ｔ，７Ｔにて一層確実に阻止することができるようになる。
　なお、突起部７Ｔは、上記のように、電解液の端子４への移動を阻止するためのものであるから、その沿面距離が長くできる形状、例えば環状の凹部にしてもよく、この環状の凹部と前記環状の突起部７Ｔとを組み合わせてもよい。 The conducting portion 7 includes a first horizontal plate portion 7A extending in the horizontal direction from the upper portion of the bushing 6, a vertical plate portion 7B hanging downward from an end portion of the first horizontal plate portion 7A, and the vertical plate portion 7B. 2C, and a second horizontal plate portion 7C extending in the horizontal direction from the lower end of the terminal 4 and connected to the lower portion of the terminal 4. It may be provided with a predetermined interval). In this case, as described above, the electrolyte 7 having moved into the space K above the lid 2 moves between the conducting portion 7 and the bulging portion 2F of the lid 2 and moves to the terminal 4 so that the protrusion 7T, It becomes possible to prevent more reliably at 7T.
The protrusion 7T is for preventing the electrolyte from moving to the terminal 4 as described above. Therefore, the protrusion 7T may have a shape that can increase the creeping distance, for example, an annular recess. You may combine a recessed part and the said cyclic | annular projection part 7T.
　本発明の蓄電池用蓋は、空洞部を有する端子４と、電槽内の極板群から延びる極柱５が挿入されて溶接される筒状のブッシング６と、ブッシング６の上部側と端子４の下部側とを連結する導通部７とを一体成形により構成した上記のような端子部８を採用し、端子４の空洞部にナットを挿入してインサート成形したものであるが、その製造方法は以下のとおりである。 The lid for a storage battery according to the present invention includes a terminal 4 having a hollow portion, a cylindrical bushing 6 into which a pole 5 extending from an electrode plate group in the battery case is inserted and welded, an upper side of the bushing 6 and the terminal 4. The terminal portion 8 as described above, which is formed by integrally molding the conducting portion 7 that connects to the lower side of the terminal, is inserted into the cavity of the terminal 4 by insert molding, and its manufacturing method Is as follows.
　まず、端子４とブッシング６と導通部７を、鉛又は鉛合金の鋳造法を採用して一体成形することにより端子部８を作製する。直方体の端子４が空洞部を有し、その端子４に、貫通孔４Ｋ１，４Ｋ２が長方形状の上面板部４Ａ及び長方形状の前面板部４Ｂの左右に偏った位置に形成されるように、金型を用いて鉛又は鉛合金を鋳造することが好ましい。
　なお、端子４は、直方体に限定されるものではなく、左右の形状も必ずしも同様でなくてもよく、上面板部４Ａにおける貫通孔４Ｋ１の位置や前面板部４Ｂにおける貫通孔４Ｋ２の位置も図示したものに限定されるものではない。
　鉛合金としては、Ｐｂ－Ｃａ－Ｓｎ系合金、Ｐｂ－Ｓｎ系合金、Ｐｂ－Ｃａ系合金、Ｐｂ－Ｓｂ系合金等を用いることができる。 First, the terminal part 8 is produced by integrally molding the terminal 4, the bushing 6 and the conducting part 7 by adopting a lead or lead alloy casting method. The rectangular parallelepiped terminal 4 has a hollow portion, and the through holes 4K1 and 4K2 are formed in the terminal 4 at positions offset to the left and right of the rectangular upper surface plate portion 4A and the rectangular front surface plate portion 4B. It is preferable to cast lead or a lead alloy using a mold.
The terminal 4 is not limited to a rectangular parallelepiped, and the left and right shapes are not necessarily the same, and the position of the through hole 4K1 in the upper surface plate portion 4A and the position of the through hole 4K2 in the front surface plate portion 4B are also illustrated. It is not limited to what was done.
As the lead alloy, a Pb—Ca—Sn alloy, a Pb—Sn alloy, a Pb—Ca alloy, a Pb—Sb alloy, or the like can be used.
　本発明の蓄電池用蓋の射出成形方法においては、上記のようにして作製した端子部８を用いて、貫通孔が２箇所ある端子４の空洞部に、ネジ孔が２箇所あるナット１１を、端子の貫通孔４Ｋ１とナットのネジ孔１１Ｋ１、端子の貫通孔４Ｋ２とナットのネジ孔１１Ｋ２が連通するように挿入する。そして、蓋２の成形金型に、ナット１１が挿入された端子部８をインサートして合成樹脂を射出成形する。射出成形圧力により、鉛又は鉛合金製の端子の底部が変形し、ナット１１が端子４の空洞部に固定されて、図１に示す蓄電池用蓋２が作製される。 In the storage battery lid injection molding method of the present invention, using the terminal portion 8 produced as described above, the nut 11 having two screw holes in the hollow portion of the terminal 4 having two through holes, The terminal through-hole 4K1 and the nut screw hole 11K1, and the terminal through-hole 4K2 and the nut screw hole 11K2 are inserted so as to communicate with each other. And the terminal part 8 in which the nut 11 was inserted is inserted in the molding die of the lid | cover 2, and synthetic resin is injection-molded. The bottom of the lead or lead alloy terminal is deformed by the injection molding pressure, and the nut 11 is fixed to the cavity of the terminal 4 to produce the storage battery lid 2 shown in FIG.
　本発明（４）においては、上記のように射出成形する際に、端子部８のうちの少なくともブッシング６の下側部分６Ｂと導通部７とが蓋２（合成樹脂）に埋め込まれるように、かつ、蓋２の裏側におけるブッシング６が合成樹脂に埋め込まれた下側部分６Ｂと導通部７が合成樹脂に埋め込まれた部分の隙間２Ｇに、両者をつなぐ合成樹脂製の薄板２Ｈが形成されるように射出成形する。すると、蓋２の裏側において、薄板（薄いリブ）２Ｈを形成する合成樹脂が、その近傍にある合成樹脂よりも速く凝固し、薄板２Ｈが、ツッパリ板の作用をし、薄板２Ｈの両端にあるブッシング６の下側部分６Ｂが埋め込まれる合成樹脂と導通部７が埋め込まれる合成樹脂を支持することにより、その合成樹脂の収縮を抑制する。したがって、端子部８が収縮率の大きい合成樹脂に埋め込まれた蓋２の裏側の収縮率が、従来よりも小さくなり、収縮率の小さい鉛又は鉛合金の端子部８が露出している蓋２の表側の収縮率と同程度となるので、蓋２の表側が凸状に、蓋２の裏側が凹状に変形する短側面の反りが抑制される。 In the present invention (4), at the time of injection molding as described above, at least the lower portion 6B of the bushing 6 and the conductive portion 7 of the terminal portion 8 are embedded in the lid 2 (synthetic resin). In addition, a synthetic resin thin plate 2H is formed in the gap 2G between the lower portion 6B where the bushing 6 on the back side of the lid 2 is embedded in the synthetic resin and the portion where the conducting portion 7 is embedded in the synthetic resin. Injection molding. Then, on the back side of the lid 2, the synthetic resin forming the thin plate (thin rib) 2H solidifies faster than the synthetic resin in the vicinity thereof, and the thin plate 2H acts as a slipper plate and is at both ends of the thin plate 2H. By supporting the synthetic resin in which the lower portion 6B of the bushing 6 is embedded and the synthetic resin in which the conductive portion 7 is embedded, shrinkage of the synthetic resin is suppressed. Accordingly, the shrinkage rate of the back side of the lid 2 in which the terminal portion 8 is embedded in a synthetic resin having a large shrinkage rate is smaller than that of the conventional case, and the lead 2 or lead alloy terminal portion 8 having a small shrinkage rate is exposed. Therefore, the warping of the short side surface in which the front side of the lid 2 is deformed into a convex shape and the back side of the lid 2 is deformed into a concave shape is suppressed.
　薄板（薄いリブ）２Ｈを形成する合成樹脂は、上記のように速く凝固させる必要があるから、ブッシング６の下側部分６Ｂが埋め込まれる合成樹脂と導通部７が埋め込まれる合成樹脂の厚さよりも薄くなるように射出成形する。また、図２に示すように、蓋２の裏側には、電槽１の対向する位置に設けられた隔壁と接合するためのリブ２Ｒ′が設けられているが、薄板（薄いリブ）２Ｈの厚さは、上記のリブ２Ｒ′やリブ２Ｒ′に連なる蓋２の周縁部よりも薄くしておき、これらが薄板（薄いリブ）２Ｈより速く凝固しないようにする必要がある。
　蓋２の裏側の収縮を効率的に抑制するためには、薄板（薄いリブ）２Ｈの数は、複数とすることが好ましい。また、図２に示すように、薄板（薄いリブ）２Ｈは、ブッシング６の下側部分６Ｂが埋め込まれた合成樹脂から、導通部７が埋め込まれた合成樹脂とは反対方向にも突出させれば、より効果がある。 Since the synthetic resin forming the thin plate (thin rib) 2H needs to be quickly solidified as described above, the thickness of the synthetic resin in which the lower portion 6B of the bushing 6 is embedded and the thickness of the synthetic resin in which the conductive portion 7 is embedded is larger. Injection molding to make it thinner. Further, as shown in FIG. 2, on the back side of the lid 2, ribs 2R 'for joining to the partition walls provided at the opposite positions of the battery case 1 are provided, but a thin plate (thin rib) 2H is provided. It is necessary to make the thickness thinner than the peripheral edge portion of the lid 2 connected to the rib 2R 'or the rib 2R' so that they do not solidify faster than the thin plate (thin rib) 2H.
In order to efficiently suppress shrinkage of the back side of the lid 2, the number of thin plates (thin ribs) 2H is preferably plural. Further, as shown in FIG. 2, the thin plate (thin rib) 2H protrudes from the synthetic resin in which the lower portion 6B of the bushing 6 is embedded in the opposite direction to the synthetic resin in which the conductive portion 7 is embedded. More effective.
　本発明（５）においては、上記のように射出成形する際に、端子部８のうちの少なくともブッシング６の下側部分６Ｂと導通部７とが蓋２（合成樹脂）に埋め込まれるように、かつ、蓋２の底面２Ｂから上方へブッシング６，６と端子４，４を隔てる縦板部２Ｃが立ち上がり、縦板部２Ｃの短側面側の下部に、端子４を備える切欠き部３に向けて三角形状の薄板２Ｄが張り出すように、合成樹脂を射出成形する（図１及び図３参照）。すると、射出成形後の温度の低下に伴って、端子部８が埋め込まれた蓋２の裏側の合成樹脂が凹状に変形し、端子部８が露出している蓋２の表側の合成樹脂が凸状に変形しようとする作用に対して、三角形状の薄板２Ｄの凝固、収縮が反作用となって、蓋２の表側が凸状に、蓋２の裏側が凹状に変形する短側面の反りが抑制される。
　本発明（４）又は（５）のいずれの方法で射出成形しても、蓋の変形は抑制できるが、本発明（４）及び（５）の両方を併用すれば、その効果は顕著である。 In the present invention (5), at the time of injection molding as described above, at least the lower portion 6B of the bushing 6 and the conductive portion 7 of the terminal portion 8 are embedded in the lid 2 (synthetic resin). And the vertical plate part 2C which separates the bushings 6 and 6 and the terminals 4 and 4 from the bottom face 2B of the lid 2 rises, toward the notch part 3 provided with the terminals 4 at the lower part on the short side surface side of the vertical plate part 2C. Then, synthetic resin is injection-molded so that the triangular thin plate 2D protrudes (see FIGS. 1 and 3). Then, as the temperature after the injection molding decreases, the synthetic resin on the back side of the lid 2 in which the terminal portion 8 is embedded is deformed into a concave shape, and the synthetic resin on the front side of the lid 2 where the terminal portion 8 is exposed is convex. In contrast to the action to be deformed into a shape, the solidification and contraction of the triangular thin plate 2D becomes a reaction, and the warping of the short side surface that deforms the front side of the lid 2 into a convex shape and the back side of the lid 2 into a concave shape is suppressed. Is done.
Even if injection molding is performed by any of the methods of the present invention (4) or (5), the deformation of the lid can be suppressed, but if both of the present inventions (4) and (5) are used in combination, the effect is remarkable. .
　本発明においては、上記のような射出成形方法を用いて蓋を作製する場合に限らず、空洞部を有する直方体状の端子４とブッシング６と導通部７とが一体成形により構成され、端子４の貫通孔４Ｋ１，４Ｋ２が、長方形状の上面板部及び長方形状の前面板部の２箇所に、かつ、端子４の貫通孔４Ｋ１，４Ｋ２と連通するナット１１のネジ孔１１Ｋ１，１１Ｋ２が互いに交差しないような位置に形成されている蓄電池用端子部を用いて、従来と同様にインサート成形することにより蓄電池用蓋を作製し、蓄電池への外部リード線の接続時に、ナット１１のネジ孔１１Ｋ１，１１Ｋ２が、長方形状の上面から下面に向けた箇所及び長方形状の前面から背面に向けた箇所の２箇所に、かつ、互いに交差しない位置に形成されている直方体状のナットを、端子４の貫通孔４Ｋ１，４Ｋ２とナット１１のネジ孔１１Ｋ１，１１Ｋ２が連通するように、端子４の空洞部に挿入して蓄電池としてもよい。
　また、従来の蓄電池のように、ナットのネジ孔を一つとし、外部リード線を接続したい端子の貫通孔として、天板部（上面板部）又は前板部（前面板部）のいずれかの貫通孔を選択し、その選択した貫通孔とナットのネジ孔とが一致するように、ナットの向きを変更して端子の空洞部に挿入する方法も採用できる。 In the present invention, not only when the lid is manufactured using the injection molding method as described above, but the rectangular parallelepiped terminal 4 having a hollow portion, the bushing 6 and the conducting portion 7 are formed by integral molding. Through holes 4K1 and 4K2 are formed at two locations on the rectangular upper plate and the rectangular front plate, and screw holes 11K1 and 11K2 of the nut 11 communicating with the through holes 4K1 and 4K2 of the terminal 4 intersect each other. A storage battery lid is produced by insert molding in the same manner as in the past using the storage battery terminal portion formed at such a position so that the external lead wire is connected to the storage battery. 11K2 is a rectangular parallelepiped nut that is formed in two locations, a location facing from the top surface to the bottom surface of the rectangular shape and a location facing from the front surface to the back surface of the rectangular shape, and not intersecting each other , Screw holes 11K1,11K2 through holes 4K1,4K2 the nut 11 of the terminal 4 so as to communicate may be battery inserted into the cavity of the pin 4.
Also, like a conventional storage battery, one screw hole of the nut and one of the top plate part (upper surface plate part) or the front plate part (front plate part) as the through hole of the terminal to which the external lead wire is to be connected It is also possible to adopt a method in which the through hole is selected and the direction of the nut is changed and the terminal is inserted into the terminal cavity so that the selected through hole matches the screw hole of the nut.
　蓄電池への外部リード線の接続時に、ナットを端子の空洞部に挿入する場合には、図３に示すように、端子４の下端に蓋成形時の樹脂にて埋設されてアンカー効果を発揮する板状で小判状のアンカー部４Ｔを一体形成することができる。アンカー部４Ｔを別体形成して、端子４の下端に溶接等により一体化してもよい。アンカー部４Ｔは、端子４の下端に一体形成されている平板状の底部４Ｆから下方に一体的に延びる連結部４Ｇの下端に、該連結部４Ｇよりも平面視において大きな寸法にて一体形成されている。
　ナットを端子の空洞部に挿入してインサート成形する場合には、端子４の底部を変形させる必要があるが、上記のように底部の中央にアンカー部を突設すると端子４の底部を変形させ難くなる。そこで、アンカー部を突設する場合には、端子４の底部４Ｆに、切り欠きを中央部に有するアンカー部、例えば、板の中央部を大きく切り欠き、中央部の肉を無くしたＵ字状のアンカー部を突設し、その切り欠きに対応する肉厚が薄い端子の底部を変形させるようにする。この場合、アンカー部が端子の底部の全面を覆わないで、端子の底部に変形し得る肉厚が薄い部分が残っていればよいから、アンカー部はＵ字状に限らず、他の形状の切り欠きを有するものでもよく、あるいは、穴を中央部に有するアンカー部、空間を中央部に有する２列のアンカー部など、少なくとも中央部を除いた箇所にアンカー部が突設されるものであればよい。 When the external lead wire is connected to the storage battery, when the nut is inserted into the cavity of the terminal, as shown in FIG. A plate-like and oval anchor portion 4T can be integrally formed. The anchor portion 4T may be formed separately and integrated with the lower end of the terminal 4 by welding or the like. The anchor portion 4T is integrally formed at a lower end of a connecting portion 4G integrally extending downward from a flat bottom portion 4F formed integrally with the lower end of the terminal 4 in a size larger than that of the connecting portion 4G. ing.
When insert molding is performed by inserting a nut into the hollow portion of the terminal, it is necessary to deform the bottom portion of the terminal 4, but if the anchor portion protrudes from the center of the bottom portion as described above, the bottom portion of the terminal 4 is deformed. It becomes difficult. Therefore, when the anchor portion is provided in a protruding manner, the bottom portion 4F of the terminal 4 is an anchor portion having a notch in the center portion, for example, a central portion of the plate is greatly cut out, and the U-shape is eliminated from the center portion. The bottom of the terminal having a small thickness corresponding to the notch is deformed. In this case, the anchor portion does not cover the entire surface of the bottom of the terminal, and it is only necessary to leave a thin portion that can be deformed at the bottom of the terminal. It may have a notch, or the anchor part protrudes at least at the place excluding the central part, such as an anchor part having a hole in the central part or two rows of anchor parts having a space in the central part. That's fine.
　本発明の蓄電池用の蓋は、通常の鉛蓄電池の電槽、すなわち、隔壁によって内部が複数のセルに区画され、各セルに極板群が収納され、前記極板群から延びる極柱を有する合成樹脂製の電槽に適用でき、上記のように、電槽１内の極板群から延びる極柱５を、上方から被覆した蓋２のブッシング６に溶接することにより、電力を取り出すようにすることができる。 The lid for a storage battery according to the present invention has a battery case of a normal lead storage battery, that is, the inside is partitioned into a plurality of cells by partition walls, each of which contains an electrode plate group and has a pole column extending from the electrode plate group. It can be applied to a battery case made of synthetic resin, and as described above, the pole 5 extending from the electrode plate group in the battery case 1 is welded to the bushing 6 of the lid 2 covered from above so that electric power can be taken out. can do.
１：電槽、２：蓋、２Ａ：上端、２Ｂ：底面、２Ｃ：縦板部、２Ｄ：三角形状の薄板、２Ｆ：膨出部、２Ｇ：裏側の隙間、２Ｈ：裏側の薄板（薄いリブ）、２Ｒ′：裏側のリブ、２Ｍ：溝部、２Ｒ（２ｒ）：リブ、３：切欠き部、４：端子、４Ａ：天板部（上面板部）、４Ｂ：前板部（前面板部）、４Ｃ：後板部、４Ｄ：左板部、４Ｅ：右板部、４Ｆ：底部、４Ｇ：連結部、４Ｋ１，４Ｋ２：貫通孔、４Ｔ：アンカー部、４ａ：上面、５：極柱、６：ブッシング、６Ａ：上側部分、６Ｂ：下側部分、６Ｔ：突起部、７：導通部、７Ａ：水平板部、７Ｂ：縦板部、７Ｃ：水平板部、７Ｔ：突起部、８：端子部、９：補助蓋、９Ｒ（９ｒ）：リブ、９Ｓ：スカート部、１０：蓄電池、１１：ナット、１１Ｋ１，１１Ｋ２：ネジ孔、Ｂ：溶接部分、Ｋ：空間 1: battery case, 2: lid, 2A: top, 2B: bottom, 2C: vertical plate, 2D: triangular plate, 2F: bulge, 2G: gap on the back side, 2H: thin plate on the back side (thin rib) ), 2R ′: back rib, 2M: groove, 2R (2r): rib, 3: notch, 4: terminal, 4A: top plate (top plate), 4B: front plate (front plate) 4C: Rear plate portion, 4D: Left plate portion, 4E: Right plate portion, 4F: Bottom portion, 4G: Connection portion, 4K1, 4K2: Through hole, 4T: Anchor portion, 4a: Upper surface, 5: Polar column, 6: bushing, 6A: upper part, 6B: lower part, 6T: protrusion, 7: conduction part, 7A: horizontal plate part, 7B: vertical plate part, 7C: horizontal plate part, 7T: protrusion part, 8: Terminal part, 9: Auxiliary lid, 9R (9r): Rib, 9S: Skirt part, 10: Storage battery, 11: Nut, 11K1, 11K2: Screw hole, B: Welded part, : Space
　本発明の蓄電池用蓋及びその射出成形方法によれば、端子部がインサート成形された蓋の変形、特に蓋の短側面の反りを抑制することができるから、そのような蓋を備えた蓄電池は、自動二輪車用として有用である。 According to the storage battery lid of the present invention and the injection molding method thereof, the deformation of the lid in which the terminal portion is insert-molded, in particular, the warpage of the short side surface of the lid can be suppressed. It is useful for motorcycles.

Claims (7)

  1. 　電槽を閉じるための合成樹脂製の蓋に、切欠き部又は凹部を形成し、前記切欠き部又は凹部に端子を備え、ブッシングを前記蓋内に備え、前記ブッシングの上部側と、前記ブッシングと水平方向で並置される前記端子の下部側とを連結する導通部を備え、前記端子とブッシングと導通部より端子部を構成するとともに、前記端子部のうちの少なくともブッシングの下側部分と前記導通部とがインサート成形により前記蓋に埋め込まれた蓄電池用蓋において、前記蓋の裏側における前記ブッシングが前記合成樹脂に埋め込まれた下側部分と前記導通部が前記合成樹脂に埋め込まれた部分の隙間に、両者をつなぐ前記合成樹脂製の薄板が設けられていることを特徴とする蓄電池用蓋。 A notch or recess is formed in a synthetic resin lid for closing the battery case, a terminal is provided in the notch or recess, a bushing is provided in the lid, an upper side of the bushing, and the bushing And a lower portion of the terminal juxtaposed in the horizontal direction, the terminal portion is constituted by the terminal, the bushing and the conductive portion, and at least the lower portion of the bushing and the In the storage battery lid in which the conductive portion is embedded in the lid by insert molding, a lower portion in which the bushing on the back side of the lid is embedded in the synthetic resin and a portion in which the conductive portion is embedded in the synthetic resin A lid for a storage battery, characterized in that a thin plate made of the synthetic resin that connects the two is provided in a gap.
  2. 　電槽を閉じるための合成樹脂製の蓋に、切欠き部を形成し、前記切欠き部に端子を備え、ブッシングを前記蓋内に備え、前記ブッシングの上部側と、前記ブッシングと水平方向で並置される前記端子の下部側とを連結する導通部を備え、前記端子とブッシングと導通部より端子部を構成するとともに、前記端子部のうちの少なくともブッシングの下側部分と前記導通部とがインサート成形により前記蓋に埋め込まれた蓄電池用蓋において、前記蓋の底面から上方へ立ち上げた前記ブッシングと前記端子を隔てる縦板部の短側面側の下部に、前記切欠き部に向けて三角形状に張り出す前記合成樹脂製の薄板を設けたことを特徴とする蓄電池用蓋。 A notch is formed in a synthetic resin lid for closing the battery case, a terminal is provided in the notch, a bushing is provided in the lid, an upper side of the bushing, and the bushing in a horizontal direction. A conductive portion that connects the lower side of the terminals juxtaposed with each other; the terminal portion is configured by the terminal, the bushing, and the conductive portion; and at least a lower part of the bushing and the conductive portion are included in the terminal portion. In the storage battery lid embedded in the lid by insert molding, a triangle toward the notch is formed at the lower part of the short side surface of the vertical plate portion separating the bushing and the terminal raised from the bottom surface of the lid A lid for a storage battery, characterized in that a thin plate made of the synthetic resin projecting into a shape is provided.
  3. 　ナットが前記端子の空洞部に挿入されて固定されていることを特徴とする請求項１又は２に記載の蓄電池用蓋。 The storage battery lid according to claim 1 or 2, wherein a nut is inserted and fixed in the cavity of the terminal.
  4. 　空洞部を有する端子と、ブッシングと、前記ブッシングの上部側と、前記ブッシングと水平方向で並置される前記端子の下部側とを連結する導通部より構成された端子部を、蓋の成形金型にインサートして、前記端子部のうちの少なくともブッシングの下側部分と前記導通部とが前記蓋に埋め込まれるように合成樹脂を射出成形する蓄電池用蓋の射出成形方法において、前記蓋の裏側における前記ブッシングが前記合成樹脂に埋め込まれる下側部分と前記導通部が前記合成樹脂に埋め込まれる部分の隙間に、両者をつなぐ前記合成樹脂の薄板が形成されるように射出成形し、前記薄板を形成する前記合成樹脂を、その近傍にある合成樹脂よりも速く凝固させ、前記薄板が、その両端の合成樹脂を支持し、該合成樹脂の収縮を抑制することにより、蓋の変形を抑制することを特徴とする蓄電池用蓋の射出成形方法。 A terminal mold comprising a terminal having a hollow portion, a bushing, an upper portion of the bushing, and a conductive portion connecting the lower portion of the terminal juxtaposed in the horizontal direction with the bushing, In the injection molding method of the storage battery lid, the synthetic resin is injection-molded so that at least the lower portion of the bushing and the conductive portion of the terminal portion are embedded in the lid. The thin sheet is formed by injection molding so that a thin plate of the synthetic resin is formed in a gap between a lower portion where the bushing is embedded in the synthetic resin and a portion where the conductive portion is embedded in the synthetic resin. The synthetic resin is solidified faster than the synthetic resin in the vicinity thereof, and the thin plate supports the synthetic resin at both ends thereof and suppresses shrinkage of the synthetic resin. Ri, injection molding process of the lid for a storage battery, characterized in that to suppress the deformation of the lid.
  5. 　空洞部を有する端子と、ブッシングと、前記ブッシングの上部側と、前記ブッシングと水平方向で並置される前記端子の下部側とを連結する導通部より構成された端子部を、蓋の成形金型にインサートして、前記端子部のうちの少なくともブッシングの下側部分と前記導通部とが前記蓋に埋め込まれるように合成樹脂を射出成形する蓄電池用蓋の射出成形方法において、前記蓋の底面から上方へ前記ブッシングと前記端子を隔てる縦板部が立ち上がり、その短側面側の下部に、前記端子を備える切欠き部に向けて三角形状の薄板が張り出すように、前記合成樹脂を射出成形し、前記三角形状の薄板を形成する前記合成樹脂を凝固、収縮させることにより、蓋の変形を抑制することを特徴とする蓄電池用蓋の射出成形方法。 A terminal mold comprising a terminal having a hollow portion, a bushing, an upper portion of the bushing, and a conductive portion connecting the lower portion of the terminal juxtaposed in the horizontal direction with the bushing, In the injection molding method of the storage battery lid, the synthetic resin is injection molded so that at least the lower part of the bushing and the conductive portion of the terminal portion are embedded in the lid. The synthetic resin is injection-molded so that a vertical plate part that separates the bushing and the terminal rises upward, and a triangular thin plate projects toward the notch part having the terminal at the lower part of the short side surface thereof. A method for injection molding a lid for a storage battery, wherein the synthetic resin forming the triangular thin plate is solidified and contracted to suppress deformation of the lid.
  6. 　前記合成樹脂を射出成形する際に、ナットを前記端子の空洞部に挿入することを特徴とする請求項４又は５に記載の蓄電池用蓋の射出成形方法。 6. The method for injection molding a storage battery lid according to claim 4, wherein a nut is inserted into the cavity of the terminal when the synthetic resin is injection molded.
  7. 　隔壁によって内部が複数のセルに区画され、各セルに極板群が収納された合成樹脂製の電槽と、前記電槽を上方から被覆する合成樹脂製の蓋とを備えた蓄電池において、請求項１～３のいずれか一項に記載の蓄電池用蓋を備えたことを特徴とする蓄電池。 In a storage battery comprising a synthetic resin battery case that is partitioned into a plurality of cells by a partition wall and in which each electrode plate group is housed, and a synthetic resin lid that covers the battery case from above. A storage battery comprising the storage battery lid according to any one of Items 1 to 3.
PCT/JP2010/073097 2009-12-24 2010-12-22 Lid for storage battery, injection-molding method for the lid for storage battery, and storage battery with the lid for storage battery WO2011078211A1 (en)

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Publication number Priority date Publication date Assignee Title
CN104772863A (en) * 2015-04-22 2015-07-15 福建省华科模具科技有限公司 Battery terminal injection mold
WO2022230435A1 (en) * 2021-04-27 2022-11-03 株式会社Ｇｓユアサ Power storage device

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