JP2011076929A - Storage battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent discolor or corrosion of a terminal for a long period by strengthening a binding force between the outer periphery of a conduction part and a synthetic resin and making the electrolyte hardly move through a gap between the conduction part and a lid to the terminal side. <P>SOLUTION: The storage battery includes terminals 2, 3 on a lid 1 of synthetic resin which covers the upper opening of a battery case, and has cylindrical bushings 6, 7 into which an electrode pole S for taking out electric power is inserted and welded, and also includes a conduction part 15 for connecting the lower side of the terminals 2, 3 and the bushings 6, 7, and further has an upper lid 5 for covering the bushings from the top. The terminals 2, 3, the bushings 6, 7, and the conduction part 15 constitutes a terminal by a one-body molding, and the conduction part 15 is configured to be a circular or elliptical shape in its outline, and out of the terminal, at least the lower part of the bushings 6, 7 and the conduction part 15 are embedded in the lid 1 by an insert molding. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a storage battery that is particularly suitable for mounting on a vehicle such as a motorcycle or an automobile. More specifically, the present invention relates to a lid that is rectangular in plan view covering the upper opening of a battery case, and a pole column is the lid. It is related with the improvement of the storage battery provided with the conduction | electrical_connection part for connecting the lower part side of the said terminal and the said bushing while being inserted and welded to the bushing with which it was equipped.

  The above storage battery has a cylindrical bushing that is welded by inserting a pole column that protrudes upward from the battery case side, and a terminal is disposed in a notch formed on the front side in the horizontal direction from the bushing. The terminal is connected to the bushing by a conducting portion, thereby enabling a compact configuration in the vertical direction. By adopting such a configuration, even when a storage battery having the same dimensions 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 used in recent years.

  And as a storage battery provided with the terminal structure of the above-mentioned structure, the through hole of the horizontal plate part which constitutes a part of the extension part extended to one end of the terminal is provided in the bushing provided in the lid made of synthetic resin. By fitting and welding, the bushing and the terminal are in a conductive state, and the resin cover provided at the lower end of the vertical plate at the other end of the terminal is heated and melted in the notch at the corner of the lid. The terminal is fixed to the bottom surface of the notch by fitting in the fitting recess formed on the bottom surface, and then heat sealing is applied to the fitting groove formed on the top surface of the lid body to cover the top of the bushing. A device that has been fixed to complete the mounting of the terminal has been proposed (see, for example, Patent Document 1).

In addition, a notch or recess is formed in the synthetic resin lid for closing the battery case, a terminal is provided in the notch or recess, and a pole column for taking out electric power extending from the battery case is inserted. The battery is provided with a bushing to be welded to the lid, and includes a conduction portion for connecting the upper side of the bushing to the lower side of the terminal, and a storage battery including an auxiliary lid that covers the bushing. Comprises a terminal part by integral molding, and has an annular protrusion protruding outward on the side surface of the conducting part, and at least the lower part of the bushing and the conducting part are embedded in the lid by insert molding. Have been proposed (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 2003-077744 (see FIGS. 2 to 4) JP 2009-043441 A (see FIG. 2)

In the storage battery having the configuration described in Patent Document 1, in addition to welding the pole column and the bushing, an operation of welding one end of the terminal to the bushing is required, and a resin cover provided at the other end of the terminal is notched in the lid. There is a problem in that the number of work steps increases because an operation of welding to the fitting recess of the portion is also required.
In addition, since the extending part that connects the bushing and the terminal is exposed to the outside, when the electrolyte moves upward through a small gap between the lid and the bushing, the terminal is connected via the extending part. The terminal may be discolored or corroded.

Moreover, in the storage battery of the structure of the said patent document 2, when temperature falls from the high temperature state immediately after insert molding, the shrinkage | contraction rate of the back side of the lid | cover with which the terminal part was embedded, and the front side of the lid | cover in which the terminal part is exposed Due to the difference in shrinkage rate, 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. Has proposed a lid structure that can suppress the deformation of Japanese Patent Application No. 2008-206417.

  In view of the above-mentioned situation, the present invention intends to solve the problem that the terminal is prevented from being discolored or corroded over a long period of time, and can be easily and quickly assembled. A storage battery having a configuration in which the binding force of the synthetic resin to the portion does not weaken is provided.

  In order to solve the above-described problem, the storage battery of the present invention includes a terminal on a rectangular synthetic resin lid that covers the upper opening of the battery case, and a pole column for taking out electric power is inserted. In a storage battery comprising a cylindrical bushing to be welded and having a conducting part for connecting the lower side of the terminal and the bushing, the terminal, the bushing and the conducting part constitute a terminal part by integral molding. In addition, the conductive portion is configured to have a circular or elliptical outer shape, and at least the lower portion of the bushing of the terminal portion and the conductive portion are embedded in the lid by insert molding. It is characterized by that.

  Further, the conducting part is characterized in that a side surface includes an annular protrusion protruding outward or an annular groove recessed inward.

  Further, the lid body is formed by embedding the lower part of each positive and negative terminal on each side and in both longitudinal ends thereof, and projecting the upper part, and projecting the upper part of each terminal. It is characterized in that a protrusion is formed on the periphery of the place to be provided or in the vicinity thereof.

By embedding the terminal part in which the terminal, bushing and conducting part are integrated in the lid by insert molding, not only the fixing work for fixing the terminal to the lid is unnecessary, but also the number of parts can be reduced. And a storage battery that can be easily and quickly assembled.
Moreover, since the lower part of the bushing and the conductive part are closely embedded in the lid by insert molding, the electrolyte from the storage battery is difficult to move from between the bushing and the lid to the upper lid side. In addition, by configuring the conductive portion into a shape that has an outer shape of a circle or an ellipse, the conductive portion can equalize the force of tightening the synthetic resin compared to when the outer shape is a square with a corner, Even if the outer peripheral surface of the conducting part has better binding properties to the synthetic resin and the lid body is deformed after insert molding, it is difficult to create a gap between the conducting part and the lid body. It is further difficult for the electrolytic solution to move to the terminal side, and the terminal can be reliably prevented from being discolored or corroded for a long period of time.

  Moreover, the conducting part includes a protrusion or a recess, and can reliably prevent the electrolyte from moving to the terminal side through the conducting part and the lid.

  Further, by forming a protrusion at the periphery of the portion where the lower portion of each of the positive and negative terminals is embedded and the upper portion is protruding, or the vicinity thereof, the portion is deformed into a convex shape, and the lid It is possible to prevent the back side portion of the body from being deformed into a concave shape, and to prevent a gap from being generated between the outer peripheral surface of the conductive portion and the synthetic resin. In addition, the outer peripheral surface of the conducting portion has a good binding property to the synthetic resin. Thus, it is possible to reliably prevent the electrolytic solution from moving to the terminal side through between the conducting portion and the lid.

It is a top view of the cover body equipped with the upper cover. It is a top view of the cover body before mounting | wearing with an upper cover. It is a bottom view of a lid. (A) is a right side view of the lid, (b) is a front view of the lid, (c) is a cross-sectional view taken along line AA in FIG. 2, and (d) is a cross-sectional view taken along line AB in FIG. . An upper lid is shown, (a) is a plan view thereof, (b) is a bottom view thereof, (c) is a front view thereof, and (d) is a sectional view taken along the line CC in FIG. 5 (b). (A) is a plan view thereof, (b) is a side view thereof, (c) is a bottom view thereof, (d) is a front view thereof, and (e) is a rear view thereof. is there. (a) is a perspective view of a terminal part, (b) is the DD sectional view taken on the line in FIG.6 (b). a) is a perspective view of another terminal portion, and FIG. 6B is a cross-sectional view corresponding to a cross section taken along the line DD of FIG.

  1 and 2 show a lid 1 of a storage battery (lead storage battery) according to the present invention, FIG. 1 shows a state in which an upper lid 5 described later is mounted, and FIG. 2 shows a state immediately before mounting an upper lid 5 described later. Indicates the state. The lid 1 is formed of a synthetic resin in a rectangular shape in a plan view, and covers an upper opening of a battery case (not shown) provided with a plurality of partitioned cell chambers. The lead-acid battery provided with the lid 1 is particularly suitable when mounted on a vehicle such as a motorcycle or an automobile, but can also be used for other purposes. 1 and 2, the long side direction of the lid 1 is the left-right direction, and the direction orthogonal to the long side direction is the front-rear direction.

As shown in FIG. 2, the lid 1 is provided with a pair of left and right terminals 2 and 3 on one long side (front end in the front-rear direction) so as to be located at both ends in the long side direction (left-right direction), respectively. A first lid portion 1A and a second lid portion 1B having an upper surface higher than the upper surface of the first lid portion 1A are provided. And the recessed part 4 dented below is formed in the upper surface of the said 2nd cover part 1B.
In FIG. 2, the left terminal 2 is a negative terminal, and the right terminal 3 is a positive terminal.

  The concave portion 4 has a bottom wall 4A that forms a bottom portion, and a vertical wall 4B that rises upward from the outer peripheral edge of the bottom wall 4A. Further, inside the concave portion 4, an annular projecting portion 4 </ b> C projecting upward is provided at a portion of the bottom wall 4 </ b> A located inside the vertical wall 4 </ b> B.

As shown in FIGS. 2 and 3, the bottom wall 4A in the protrusion 4C is provided with exhaust holes 4D for exhausting gases from the plurality (six in the figure) of the cell chambers. .
As shown in FIGS. 1, 2 and 5A, 5B, 5C, and 5D, the gas exhausted from the plurality of exhaust holes 4D is collected to a specific cell chamber side. In order to form this space, an upper lid 5 that closes the inside of the protruding portion 4C is provided. The protruding portion 4C is formed in a substantially rectangular shape in plan view of FIG. 2, and includes a curved portion in which that portion enters the inside so as to bypass a second exhaust hole 4F described later.

  Further, the bottom wall 4A is formed on an inclined surface positioned downward toward the exhaust hole 4D, and the electrolyte solution escaped from each exhaust hole 4D can be returned to the corresponding exhaust hole 4D side. It is designed to function as a possible guide surface. Furthermore, it is provided with extending portions 4E and 4E that extend inward from the opposing positions of the projecting portion 4C and form gaps between the adjacent exhaust holes 4D, and only the gas exhausted from the exhaust holes 4D is provided. The inside of the protrusion 4C is freely moved so that the electrolyte that has escaped from the exhaust hole 4D can be prevented from moving toward the other adjacent exhaust hole 4D as much as possible.

As shown in FIG. 2, FIG. 3 and FIG. 4 (c), a pole column S (see FIG. 6 (b)) for taking out electric power extending from the battery case is inserted into the recess 4 and welded. A pair of left and right cylindrical bushings 6 and 7 are embedded. Further, the bushings 6 and 7 and the bushings 6 and 7 and the lower side of the terminals 2 and 3 juxtaposed in the horizontal direction are connected by a conducting portion 15 (see FIGS. 6A and 6B). .
The terminals 2 and 3, the bushings 6 and 7, and the conducting portion 15 are integrally formed of lead or a lead alloy to form a terminal portion, and the conducting portion 15 is embedded in the lid 1. .
As shown in FIGS. 6B and 6E, the outer periphery of the bushing 6 or 7 is provided with a plurality of annular protrusions 6T or 7T along the vertical direction, and the electrolyte is in contact with the bushing 6 or 7. It is possible to suppress the upward movement from the space between the lid body 1, and even if the electrolyte solution moves upward, it remains in the space closed by the upper lid 5, and the outside of the upper lid 5. There is no leakage.

  6 (a) to 6 (e) and FIGS. 7 (a) and 7 (b), an annular protrusion 15A projecting outward (or an annular groove recessed inward) is formed on the side surface of the conducting portion 15. And the conducting portion 15 is formed in a circular shape, and at least the lower portions of the bushings 6 and 7 of the terminal portion and the conducting portion 15 are formed by insert molding. Embedded in the lid. By configuring the conductive portion 15 in such a shape that the outer shape thereof is circular, the fastening force of the synthetic resin on the outer periphery of the conductive portion 15 is made uniform compared to the case where the outer shape is square. Therefore, the synthetic resin bites into the outer periphery of the conductive portion 15 evenly. That is, in the connecting direction of the terminals 2 and 3 and the bushings 6 and 7, the synthetic resin uniformly enters the grooves 15B between the adjacent projecting portions 15A and 15A, and the outer peripheral surface of the conducting portion 15 is connected to the synthetic resin. Wearability improves, and it can prevent reliably that electrolyte solution passes through between the conduction | electrical_connection part 15 and the cover body 1 to the terminal 2 and 3 side. 6 (a) to 6 (e) and FIGS. 7 (a) and 7 (b), the conductive portion 15 is formed in a circular shape, but in FIGS. 8 (a) and 8 (b). As shown, even if the conductive portion 15 is configured to have an oval outer shape, the synthetic resin bites into the outer periphery of the conductive portion 15 evenly, and the outer peripheral surface of the conductive portion 15 is against the synthetic resin. The binding property is improved.

  One end of the conducting portion 15 is connected to the lower portion of the bushing 6 or 7, and the conducting portion main body 15 a provided with the projecting portion 15 A and the upper portion of the flange portion 2 G or 3 G provided at the lower end of the terminal 2 or 3 And a vertical plate portion 15C to which the other end of the conducting portion main body 15a is connected.

  As shown in FIGS. 6B, 6D, and 6E, anchors are embedded in the lower surface of the flange portion 2G or 3G provided at the lower end of the terminal 2 or 3 with resin at the time of forming the lid. A plate-like, oval anchor portion 2T or 3T that exhibits the effect is integrally formed. The anchor portion 2T or 3T may be formed separately and integrated with the lower end of the terminal 2 or 3 by welding or the like. The anchor portion 2T or 3T is integrally formed at a lower end of a connecting portion 2H or 3H integrally extending downward from the flange portion 2G or 3G with a size larger in plan view than the connecting portions 2H and 3H. .

  The difference between the terminal 2 or 3 shown in FIGS. 6 and 7 and the terminal 2 or 3 shown in FIGS. 1, 2, and 4 is that the nut 14 is inserted in the terminal. The receiving structure for receiving the nut 14 is different. That is, in FIGS. 1, 2 and 4, the left plate portions 2D and 3D are provided on the receiving portion side, whereas in FIGS. 6 and 7, the terminal 2 or 3 is provided with an opening, and a pair of left and right receiving portions 2I and 2I (see FIG. 6B) is provided at the lower edge of the opening. The other parts have the same configuration, and the same reference numerals as those shown in FIGS. 1, 2 and 4 are attached to FIGS.

  The upper lid 5 is made of synthetic resin, and as shown in FIG. 5B, the joint 5C having the same outer shape and the same size as the projection 4C joined to the projection 4C, and the An outer peripheral edge 5G that covers an annular groove 4M formed between the protrusion 4C and the vertical wall 4B is provided, and the upper ends of the protrusions 4C and 4T of the lid 1 and the lower ends of the joints 5C and 5T of the upper lid 5 are provided. After being in a molten state, they can be integrated by combining them. The second exhaust hole 4F is provided with a porous filter and a valve (not shown) for the purpose of explosion-proof, prevention of backflow of gas from the outside, and adjustment of internal pressure. The joint portion 5C also includes portions corresponding to the pair of extending portions 4E and 4E provided at five locations of the projecting portion 4C, and these are also referred to as the joint portion 5C.

  The material of the lid 1 and the upper lid 5 is preferably a thermosetting resin such as polypropylene resin, but may be other synthetic resins. When the upper lid 5 is heat-welded to the lid body 1, it is preferable that both materials are the same.

  A second exhaust hole 4F different from the exhaust hole 4D formed in the bottom wall 4A is provided in the bottom wall 4A provided with the fourth exhaust hole 4D from the left in FIG. 1, and this exhaust hole 4D is provided. A guide path for collecting gas from other cell chambers through the exhaust hole 4D and guiding the gas to the discharge port 4K is formed in the cell chamber (specific cell chamber) by bypassing the groove 4M. Yes. That is, the guide path is integrated with the protrusion 4C of the recessed portion 4 after the lower end of the joint portion 5C of the upper lid 5 shown in FIG. Can be formed.

In order to perform positioning when both the lid 1 and the upper lid 5 are mounted, one of the lid 1 and the upper lid 5 is provided with a locked portion, and the other is locked to be locked to the locked portion. Department.
As shown in FIGS. 5 (a) to 5 (d), the locking portion protrudes downward from the lower surface of the upper lid 5, and has a circular cross-sectional shape and a hollow inner cylindrical shape (the inside may be a solid rod-like body). ) Having a pair of left and right cylinders 5D and 5E.
Further, as shown in FIG. 2, the locked portion includes a pair of left and right holes 11, 12, and one of the pair of left and right holes 11, 12 is locked to the hole 11. The portion 5D is formed in a size that prevents the horizontal movement of the portion 5D, and the other hole 12 is formed in a long hole in the direction opposite to the pair of holes 11, 12, that is, an oval shape.

  Therefore, as described above, before the joint portions 5C and 5T of the upper lid 5 are melted and integrated with the protrusions 4C and 4T of the lid body 1, a pair of locking portions with respect to the pair of holes 11 and 12 is provided. By positioning 5D and 5E, the positioning of the protrusions 4C and 4T of the lid 1 and the joints 5C and 5T of the upper lid 5 is completed, and the lid 1 and the upper lid 5 are moved closer to each other from that state. The projecting portions 4C and 4T of the lid 1 and the joint portions 5C and 5T of the upper lid can be reliably joined. And by forming one hole 12 as a long hole, even when the lid 1 and the upper lid 5 are difficult to position due to differences in shrinkage after molding, temperature changes after molding, changes over time, etc. Even when the upper lid 5 expands and contracts in the longitudinal direction according to the room temperature, the long hole absorbs it well, and the engagement is performed smoothly.

  Further, as shown in FIGS. 4A to 4D, the terminals 2 and 3 are in the rectangular top plate portions 2A and 3A and in the front view of the four sides of the top plate portions 2A and 3A. Front plate portions 2B, 3B hanging downward from three sides other than the right side, rear plate portions 2C, 3C, left plate portions 2D, 3D, top plate portions 2A, 3A and front plate Through-holes 2a, 2b and 3a, 3b for penetrating the bolt 16 are formed in the portions 2B, 3B. As shown in FIG. 4C, the tip of the bolt 16 passed through the through-hole 2a Is screwed into a nut 14 inserted into the terminal 2 so that the nut 14 can be fixed to the terminal 2 with a bolt 16. An external lead wire (a wire that can be connected to an on-vehicle electrical component or the like) that is not illustrated is sandwiched and fixed between the bolt 16 and the nut 14. By forming the two through holes 2a, 2b and 3a, 3b, the bolt 16 can be inserted into the terminals 2, 3 from either the upper side or the front side.

  The lid 1 will be described in detail. As shown in FIGS. 1, 2, and 4 (a) to 4 (d), each of the terminals 2, 3 of the first lid portion 1 </ b> A of the lid 1. A protrusion 13 whose upper surface 13a is higher than the upper surface 13R of the first lid portion 1A is formed at a location where the lower portion is embedded and the upper portion is protruded.

  A pair of protrusions extending from the two longitudinal directions of one side of the terminal side of the second lid portion 1B to the end (front end in the front-rear direction) of the lid body 1 and projecting from the upper surface of the first lid portion 1A. The first lid part is formed with extension parts 1C, 1D, and is surrounded by the pair of extension parts 1C, 1D and the vertical walls of the second lid part 1B located at both ends in the longitudinal direction (left-right direction) of one side. The protrusion 13 is formed on 1A, and the terminals 2 and 3 are integrally molded on the protrusion 13.

  The protrusions 13 are positioned on both sides of the first convex portion 13A in which the lower ends of the terminals 2 and 3 are embedded, and in the longitudinal direction of one side of the first convex portion 13A, and the upper surface of the first convex portion 13A. It consists of a second convex portion 13B having an upper surface 13b projecting upward from 13a and a third convex portion 13C having the upper surface 13c, and the nut 14 of the terminal 2 is inserted as shown in FIG. 4 (d). Opening 2h is formed at the end of the third convex portion 13C (the same opening 3h of the terminal 3 is formed at the end of the second convex portion 13B), and the bottom surface 2g of the opening 2h is the upper surface of the third convex portion 13C. 13c (the bottom surface 3g of the opening 3H is lower than the upper surface 13b of the second convex portion 13B). The first convex portion 13A, the second convex portion 13B, and the third convex portion 13C are formed so as to be integrated with the vertical wall of the lid 1.

  As described above, the openings 2h and 3h into which the nut 14 can be inserted are formed in the terminal 2 or 3 at the third convex portion 13C side end or the second convex portion 13B side end, and the bottom surfaces 2g and 3g of the opening are formed. By lowering the upper surface 13c of the third convex portion 13C or the upper surface 13b of the second convex portion 13B, a nut 14 is disposed on the upper surface 13c of the third convex portion 13C as shown in FIG. It can be slid and inserted into the inside through the opening 2h of the terminal 2 and inserted. The nut 14 inserted into the terminal 2 is prevented from falling because the bottom surface 2g of the opening 2h of the terminal 2 is lower than the upper surface 13c of the third convex portion 13C. In FIG. 4D, only the left terminal 2 is shown, but the right terminal 3 is the same. In the figure, since the left and right terminals have the same structure, the nut 14 is inserted from the right side into each of the terminals 2 and 3, and the second convex portions provided on the left and right sides respectively. 13B and the 3rd convex part 13C are arrange | positioned so that it may become opposite in the left-right direction. Moreover, although the upper surface 13b of the said 2nd convex part 13B and the upper surface 13c of the 3rd convex part 13C are set to the same height, you may make it different.

  The nut 14 has a cubic shape, and the nut 14 can be moved and guided stably while being in surface contact with the upper surface 13b of the second convex portion 13B or the upper surface 13c of the third convex portion 13C which is a flat surface. There is.

  4 (d) shows a state before the nut 14 is inserted into the left terminal 2, and FIG. 4 (c) shows that the nut 14 is inserted into the left terminal 2 and then the inserted nut 14 is inserted into the bolt 16. The state fixed in the terminal 2 is shown.

As described above, by providing the first convex portion 13A in which the lower portions of the terminals 2 and 3 are embedded in the portion, the portion is deformed into a convex shape, and the back side portion of the lid 1 is deformed into a concave shape. In addition, it is possible to prevent a gap from being generated between the outer peripheral surface of the conducting portion 15 and the synthetic resin. In addition, as described above, an annular protrusion is formed on the side surface of the conducting portion 15. The conductive portion 15 is configured to have an elliptical shape or a circular shape, and the conductive portion 15 can have a uniform force for fastening the synthetic resin, so that the outer peripheral surface of the conductive portion 15 is provided. However, the binding property with respect to the synthetic resin is improved, and it is possible to reliably prevent the electrolytic solution from moving to the terminals 2 and 3 through the conductive portion 15 and the lid 1.

  DESCRIPTION OF SYMBOLS 1 ... Cover body, 1A ... 1st cover part, 1B ... 2nd cover part, 1C, 1D ... Extension part, 1F ... Flat surface, 2, 3 ... Terminal, 2A, 3A ... Top plate part, 2B, 3B ... Front plate portion, 2C: Rear plate portion, 2D, 3D ... Left plate portion, 2E, 3E ... Upper end surface, 2F, 3F ... Lower end surface, 2a, 2b ... Through hole, 4 ... Recessed portion, 4A ... Bottom wall, 4B ... Vertical wall, 4C, 4T ... protruding part, 4D ... exhaust hole, 4E ... extended part, 4F ... second exhaust hole, 4K ... exhaust port, 4M ... groove part, 4T ... protruding part, 4b ... inside surface, 5 ... top cover 5C, 5T ... Joint portion, 5D, 5E ... Locking portion, 5G ... Outer peripheral edge, 5N ... Outer peripheral surface, 6,7 ... Bushing, 6A, 7A ... Upper end surface, 6B, 7B ... Lower end surface, 6T ... Protrusion 11, 12 ... holes, 13 ... projections, 13A ... first convex part, 13B ... second convex part, 13C ... third convex part, 13a, 13b, 13c, 13R ... upper surface, 4 ... nut 15 ... conductive portion, 15a ... conductive body, 15A ... projecting portion, 15B ... groove, 15C ... vertical plate portion, 16 ... bolt

Claims (3)

A lid is made of a synthetic resin having a rectangular shape in a plan view covering the upper opening of the battery case, and includes a cylindrical bushing to which a pole column for taking out electric power is inserted and welded, and a lower portion of the terminal In a storage battery comprising a conduction portion for connecting the side and the bushing,
The terminal, the bushing, and the conducting portion constitute a terminal portion by integral molding, and the conducting portion is configured to have a circular or elliptical outer shape, and at least a lower portion of the bushing of the terminal portion And the conducting part are embedded in the lid by insert molding.   2. The storage battery according to claim 1, wherein the conductive portion includes an annular protrusion protruding outward on the side surface or an annular groove recessed inward. 3. The lid is formed by embedding a lower part of each positive and negative terminal on each side and in both longitudinal ends, and an upper part projecting, and an upper part of each terminal projecting. The storage battery according to claim 1, wherein a protrusion is formed at a periphery of the portion to be fixed and / or in the vicinity thereof.

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