JP2005183205A - Storage battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage battery having an electrode pole inserted in free vertical movement into a through-hole formed in a lid, securing liquid-tightness between the electrode pole and the through-hole by a ring-shaped packing, preparing countermeasure against protrusion of the electrode pole from an upper face of the lid at vertical vibration, with improved liquid-tightness when the batteries are connected through a connection rod. <P>SOLUTION: On the storage battery, a resin ring body 8 fixed to an outer peripheral face of the electrode pole is arranged between a packing 7 and the electrode pole 3, and a locking body 11 protruded outward from an inner periphery of the through-hole is arranged at the position on an outer peripheral face of the electrode pole, lower than a lower face of the through-hole, and further, the ring-shaped packing 7 is interposed between the upper face of the resin ring body and the lower face of a cover of the connection rod. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a storage battery.

  The power generation element of the storage battery is composed of an electrode plate group in which positive and negative electrode plates are laminated via a separator, an electrolytic solution, and a battery case and a lid for storing them. The lid upper surface is provided with positive and negative terminals for connecting to an external load.For example, in the case of a lead-acid battery, the pole column connected to the electrode plate group via a strap is used as the lid. A method of welding and joining the tip end portion of the pole column and the upper end portion of the terminal through a through hole provided in an integrally formed terminal, and a through hole provided in the lid through the packing There is a method in which the terminal is inserted and used as it is. The former is commonly used for automotive lead-acid batteries. The latter is applied to lead storage batteries that are required to have a function of continuously moving up and down in response to vertical vibrations during use, such as forklifts and lead storage batteries for golf carts. In this case, the liquid tightness between the through hole provided in the lid and the pole column is ensured by the packing.

  FIG. 9 is a schematic diagram of a main part showing an example of a lead storage battery having a configuration in which a pole column is movable up and down. 1 is a lid, 2 is a through hole provided in the lid 1, 3 is a pole column, 4 is a strap, and 5 is a pole. A group of plates, 6 is a bottom surface of the through-hole, and 7 is a ring-shaped packing attached to the pole 3, and synthetic rubber is usually used. Reference numeral 10 denotes a battery case.

  In addition, the shape of the pole 3 and the through-hole 2 is a cylindrical shape in a lead storage battery. In FIG. 9, the direction in which the pole 3 is connected to the electrode plate group 5 via the strap is defined as “downward” in the pole, and the opposite direction is defined as “upward”. Furthermore, the through-hole lower surface 6 means the lowest end portion of the through-hole 2.

  As shown in FIG. 9, when a ring-shaped packing 7 made of synthetic rubber is attached to the pole 3 and then the pole pillar 3 is inserted into the through hole 2, the inside of the through hole 2 is caused by the elastic characteristics of the synthetic rubber. The pole 3 is fixed at the contact portion between the peripheral surface and the packing 7 and liquid tightness is secured. Further, the pole 3 moves up and down due to the lubricity between the inner peripheral surface of the through hole 2 and the packing 7 or between the packing 7 and the pole 3.

  In a lead-acid battery, Patent Document 1 proposes a method for ensuring airtightness and liquid-tightness between a metal bushing in close contact with a pole column and a through hole of a resin lid by an elastic sealing body made of an elastic material. Yes.

  In Patent Document 1, the pole column has a fixed structure, not movable up and down, and the present invention improves the liquid tightness of a storage battery having a configuration in which the pole column is movable up and down.

JP 2002-50327 A

  In the lead storage battery, the pole 3 is usually manufactured by casting. In casting, as is well known, molten lead is injected into a mold engraved with a pole column shape, and then solidified to form the pole column 3. In that case, in order to prevent molten lead from being rapidly cooled by the mold, a heat insulating material powder, such as a cork powder, is applied to the mold surface. Fine irregularities are formed on the surface of the pole 3 produced by casting due to the powder and bubbles generated during casting. Therefore, a slight gap is formed between the inner peripheral surface of the ring-shaped packing 7 attached to the pole column 3 and the surface of the pole column 3, and the liquid is not completely sealed and dilute sulfuric acid, which is an electrolytic solution, fills the gap. It may pass through and ooze around the pole 3 protruding from the upper surface of the lid 1, which corrodes the metals used in the connecting parts and causes serious problems such as contact failure and disconnection.

  Furthermore, since this type of storage battery has a structure as shown in FIG. 9 when subjected to severe vertical vibration, the pole column 3 protrudes too much from the upper surface of the lid 1 and the ring-shaped packing 7 has a through-hole. There is also a problem that the liquid tightness is lost.

  Further, when connecting the terminals of the storage battery in which the pole columns are configured to be movable up and down via connecting rods, bolts are inserted into through holes provided at both ends of the connecting rods, and embedded in the upper surface of the pole column 3. Connected and fixed by attaching to the nut. In this case, the pole 3 and the connecting rod are covered with a connecting rod cover and a connecting rod cover cap in order to prevent corrosion by rainwater or the like. However, a gap is formed between the upper surface of the resin ring body 8 fixed to the pole 3 and the lower surface of the connecting rod cover, and there is a problem that rainwater cannot be completely prevented.

  Therefore, an object of the present invention is to improve the liquid tightness of the pole column (terminal portion) in a storage battery in which the pole column 3 inserted through the through hole 2 provided in the lid 1 via the packing 7 is movable up and down. In addition, even when subjected to intense vertical vibration, the pole column protrudes too much on the upper surface of the lid and the packing is not removed, and liquid tightness is not lost, and further, when connecting the storage batteries via a connection rod, An object of the present invention is to provide a storage battery having excellent liquid-tightness at a connection portion.

  As a means for solving the above problems, the invention of claim 1 is directed to a storage battery in which a pole column inserted through a packing in a through hole provided in a lid is configured to be movable up and down. The resin ring body fixed to the pole column is disposed between them.

  As described above, in order to make the pole column inserted through the through hole provided in the lid vertically movable even when in use, the ring-shaped packing attached to the pole column is used to maintain the liquid tightness of the pole column part. As described above, since there are fine irregularities on the surface of the pole column as described above, the liquid tightness between the pole column surface and the inner peripheral surface of the ring-shaped packing is not perfect, and the electrolyte is outside the storage battery. The inventor of the present application has found that it oozes out, and the present invention has been made in view of this. A resin ring body is fixed along the outer peripheral surface of the pole column, and a ring-shaped packing is attached to the outer peripheral surface of the resin ring body. It is characterized by the structure.

  The invention of claim 2 is characterized in that a locking body protruding outward from the inner periphery of the through hole is provided at a position on the outer peripheral surface of the pole column and below the lower surface of the through hole. is there.

  Even if the pole column is subjected to severe vertical vibrations, the locking body protrudes to the outside from the inner diameter of the through-hole, so it is locked at the bottom surface of the through-hole, and the pole column protrudes too much to remove the packing and make it liquid-tight Can be avoided.

  According to a third aspect of the present invention, in the storage battery according to the first or second aspect of the present invention, the storage battery is connected to the upper surface of the resin ring body by connecting the storage batteries via a connection rod and covering the connection rod with a connection rod cover. A ring-shaped packing is sandwiched between the provided ring-shaped recess and the ring-shaped recess provided on the lower surface of the connecting rod cover.

  As in the present invention, the ring-shaped packing is sandwiched between the ring-shaped recess provided in the resin ring body and the ring-shaped recess provided on the lower surface of the connecting rod cover, so that conventionally a gap generated between the two is formed. Can be kept liquid-tight.

  As described above in detail, according to the present invention, in a storage battery in which a pole column inserted into a through hole provided in a lid via a packing is configured to be movable up and down, liquid tightness is greatly improved. At the same time, a storage battery with stable performance can be obtained without projecting the pole column even when the vertical vibrations are strong. Furthermore, when the storage batteries are connected via a connection rod, the liquid column between the bottom surface of the connection rod cover that covers the connection rod and the upper surface of the resin ring body is maintained in a liquid-tight state, so In addition, corrosion of the connecting rod portion can be prevented, and its industrial effect is extremely great.

  The best mode for carrying out the first invention of the present application is a storage battery in which a pole column inserted through a packing in a through hole provided in a lid is configured to be movable up and down, and between the packing and the pole column. In other words, a resin ring body fixed to the outer peripheral surface of the pole column is provided.

  As a method of fixing the resin ring body, first, a method of forming the resin ring body by integral molding with a pole column previously formed by casting is raised. With this method, the resin melts at the time of molding, so that the resin penetrates into the fine irregularities on the surface of the pole column, and the liquid tightness between the pole column outer peripheral surface and the resin inner peripheral surface is ensured. On the other hand, since the outer peripheral surface of the resin ring body is smooth, when a ring-shaped packing is attached to that portion, stable liquid tightness is ensured. As a result, it is possible to prevent bleeding of the electrolyte that has occurred in the conventional structure.

  In addition, the shape of the pole column outer peripheral surface when the pole column and the resin ring body are integrally molded may be a smooth surface, or may be one in which annular irregularities are formed on the outer peripheral surface. In the latter case, after integral molding, the contact area between the outer peripheral surface of the pole column and the inner peripheral surface of the resin ring is increased, and the liquid tightness is more excellent.

  Another method for fixing the resin ring body to the pole column is to attach a pre-molded resin ring body to the pole column, and then inject adhesive into the gap between the inner peripheral surface of the resin ring body and the outer peripheral surface of the pole column Thus, a method of securing the fixing and liquid tightness is also mentioned.

  The outer peripheral shape of the resin ring body may be a simple columnar shape, and a recess may be provided along the outer peripheral surface of the resin ring body. In the latter case, since the ring-shaped packing is fitted and fixed in the recess, when the pole column is inserted into the through hole, the packing is not displaced and the insertion is easy and the packing and the resin ring body There are three contact surfaces, and the liquid tightness can be further enhanced. Furthermore, there is an advantage that the packing is hardly displaced even when the pole column moves up and down.

As a material of the resin ring body, it is needless to say that a material having strong resistance to the electrolytic solution is suitable. Polypropylene (PP) resin and polyethylene (PE) resin are stable against acid or alkaline electrolytic solution. It can be used for any of lead acid batteries and alkaline storage batteries.

  In addition, it goes without saying that the ring packing material is required to have high resistance to the electrolyte, but it is also necessary to have elasticity in order to maintain liquid tightness. Rubber, such as chloroprene rubber, is a suitable member.

  The number and depth of the recesses provided in the resin ring body, the width, the diameter and width of the ring-shaped packing are design matters that can be selected as appropriate.

  The best mode for carrying out the second invention is a structure in which a locking body protruding outward from the inner periphery of the through hole is provided at a position on the outer peripheral surface of the pole column and below the lower surface of the through hole. It is to be.

  As the locking body of the present invention, first, a ring-shaped locking body provided along the outer peripheral surface of the pole column can be mentioned. The ring-shaped locking body may have a shape separated from the resin ring body, or may be formed integrally with the lower part of the resin ring body. Moreover, the said locking body does not need to be ring-shaped and the same effect is acquired even if it provides at least 1 or more protrusion in the outer periphery of a pole pole.

  The best mode for carrying out the third invention is to have a structure in which a ring-shaped packing is sandwiched between a ring-shaped recess provided on the upper surface of the resin ring body and a ring-shaped recess provided on the lower surface of the connection rod cover. is there.

  The depth and width of the ring-shaped concave portion provided on the upper surface of the resin ring body and the lower surface of the connecting rod cover, the ring-shaped packing shape and dimensions, and the like are design matters that can be selected as appropriate.

The present invention will be described in detail based on examples.
<Example 1>
FIG. 3 (a) is a front view of the main part showing the pole pole of Example 1 based on the first invention, (b) is a top view of the main part, 3 is the pole pole, and 8 is the pole pole 3 by insert molding. The resin ring body which consists of PP resin formed in the outer peripheral surface is shown, respectively.
<Example 2>
FIG. 4 is a front view of an essential part showing a pole column of Example 2 based on the first invention, 3 is a pole column, and 8 is a resin ring made of PP resin formed on the outer peripheral surface of the pole column 3 by insert molding. A recess 9 is formed along the outer periphery of the resin ring body 8.
<Example 3>
5A and 5B show a pole pole of Example 3 based on the first invention, wherein FIG. 5A is a front view of the main part, FIG. The front view which shows the state which fitted the ring-shaped packing in the recessed part provided in each is shown. In the figure, 3 is a pole column, 7 is a ring packing, 8 is a resin ring body made of PP resin, and 9 is a recess formed in the resin ring body. As shown in FIG. 5, in Example 3, since the pole column having the unevenness on the surface is used, the resin part flows into the recess when integrally molded, and the inner periphery of the resin ring body It can be understood that the contact area between the surface and the outer peripheral surface of the pole column is increased, and the liquid tightness is further improved.

As described above, by integrally molding the resin ring body 8 along the outer peripheral surface of the pole column 3, the conventional ring-shaped packing does not directly contact the surface of the pole column 3 having fine irregularities, but is smooth. Excellent liquid-tightness can be ensured because it comes into contact with a resin surface.
<Example 4>
FIG. 6 is a main part front view showing a pole column of Example 4 based on the second invention, and 11 shows a ring-shaped protrusion. The other components are given the same numbers as in FIG.

  As shown in FIG. 6, in this embodiment, a ring-shaped locking body 11 is provided at the lower part of the pole 3 having the resin ring body 8 having the shape shown in FIG. Since the diameter is designed to be larger than the inner diameter of the through-hole 2, when the pole 3 is subjected to vertical vibration, the locking body 11 is locked at the lower surface of the through-hole 2 at a certain height. It has a function that does not protrude.

The ring-shaped locking body 11 may be molded together when the resin ring body 8 and the pole column 3 are integrally molded, or the ring-shaped locking body 11 molded in advance is inserted into the pole column 3. Alternatively, an adhesive may be injected between the pole 3 and the ring-shaped locking body 11 to ensure the liquid-tightness of both.
<Example 5>
FIG. 7 is a front view of a main part showing the pole column of the fifth embodiment based on the second invention, and 12 shows a conical ring-shaped locking body formed integrally with the resin ring body 8. The other components are given the same numbers as in FIG.

As shown in FIG. 7, since the maximum diameter of the conical ring-shaped locking body 12 molded integrally with the resin ring body 8 is designed to be larger than the inner diameter of the through hole 2, the same effect as in the fourth embodiment is achieved. Is obtained. And since it is integrally formed with the resin ring body, it has the advantage that productivity is excellent.
<Example 6>
FIG. 8A is a cross-sectional view of a main part showing a pole column of Example 6 based on the third invention, FIG. 8B is a top view, FIG. 8C is a front view, and in FIG. An embedding nut provided on the upper surface, 91 a ring-shaped recess provided on the upper surface of the resin ring body 8, and 7 a ring-shaped punkin fitted in the recess 91, respectively. The other components are given the same numbers as in FIG.

As shown in FIG. 8, by providing a ring-shaped recess 91 on the upper surface of the resin ring body 8, as will be described later, the storage batteries are connected via a connection rod and the connection rod is covered with a connection rod cover. In this case, it is possible to prevent corrosion of the pole pole or the connecting rod due to rain water or the like outside the storage battery.
<Example 7>
FIG. 1 is a schematic diagram of a main part of a lead-acid battery according to a seventh embodiment of the present invention, showing a lead storage battery having a structure in which the pole pole using the pole pole 3 having the structure of the fifth embodiment shown in FIG. The ring-shaped packing 7 made of chloroprene is fitted into the two concave portions 9 provided on the outer peripheral surface of the body 8, and the electrode plate group 5 is formed through the strap 4 by welding, inserted into the battery case 10, and thereafter The state which mounted | wore with the lid | cover 1 is shown. In the figure, 6 is a through-hole lower surface, and 12 is a conical ring-shaped locking body formed integrally with the resin ring body 8.

As can be seen from FIG. 1, liquid tightness is maintained between the ring packing 7 and the inner surface of the through hole 2, and the inner peripheral surface of the resin ring body 8 and the outer peripheral surface of the pole column 3 are brought into close contact with each other by integral molding. As a result, liquid tightness is secured at that portion, and the electrolyte does not ooze out. In addition, even if the pole 3 is raised by vibration, the locking body 12 is locked by the through-hole lower surface 6, so that the pole 3 does not rise any further, and it is understood that the pole 3 can be prevented from protruding too much. it can.
(Example 8)
FIG. 2 is an enlarged schematic view (b) of a part surrounded by a broken line in a partially cutout principal part schematic diagram (a) and (a) showing a terminal part of the lead storage battery of Example 8 based on the present invention. 13 is a connection rod, 14 is a bolt, 15 is a connection rod cover, 16 is a connection rod cover cap, 7 is a ring-shaped packing, 91 is a ring-shaped recess provided on the upper surface of the resin ring body 8, and 92 is for a connection rod A ring-shaped concave portion 31 provided on the lower surface of the cover 15 and an embedded nut provided on the upper surface of the pole column 3 are shown. The other components are given the same numbers as in FIG.

  This example is a lead-acid battery using the pole 3 of Example 6 shown in FIG. 8, and the bolt 14 is inserted into a through hole (not shown) provided in the connecting rod 13, and the top surface of the pole 3 The connecting rod 13 is fixed to the pole pole 3 by being attached to the embedded nut 31 provided on the cover 3, the connecting rod 13 is covered with the connecting rod cover 15, and the connecting rod cover cap 16 is fitted. is there. As can be seen from FIG. 2, the ring-shaped pankin 7 made of chloroprene is sandwiched between the ring-shaped recess 92 provided on the lower surface of the cover 15 and the ring-shaped recess 91 provided on the upper surface of the resin ring body 8. Thus, the space between the lower surface of the connection rod cover 15 and the upper surface of the resin ring body 8 is kept liquid-tight, and rainwater or the like is prevented from entering the portion of the pole column 3. It can be understood that corrosion can be prevented.

Then, the nominal voltage of 2V in order to show the effect of the present invention in detail with the structure of Embodiment 7 shown in FIG. 1, the rated capacity, the lead-acid battery of 175Ah at C ₅ to prepare 50 pieces. On the other hand, in the conventional product, 50 175 Ah lead storage batteries having a structure in which packing was attached to the pole pole shown in FIG. 9 were produced. After injecting a predetermined amount of dilute sulfuric acid having a specific gravity into these lead storage batteries, chemical conversion was carried out in a battery case to complete the lead storage battery.

The rated capacity here refers to the amount of electricity determined by the manufacturer that can be taken out from the lead-acid battery when discharged under specified conditions, and is usually indicated by Ah. The rated capacity is represented by C, and _N when represented by CN represents a time rate, which means the rated capacity at that time rate. In the above case, since N = 5, it represents a 5-hour rate.

  The storage battery was subjected to a vibration test under the following conditions.

Frequency: 0 to 4000 cpm
Gravity acceleration: 2.2G
Vibration time: 2 hours each in the vertical direction After the above vibration test, whether or not the electrolyte exuded around the pole column protruding from the upper surface of the lid was visually observed and confirmed with a litmus paper. The results are shown in Table 1.

  As shown in Table 1, in the conventional product, after vibration, 3/50 electrolytes were found to have exuded from the contact portion between the outer peripheral surface of the pole 3 and the inner peripheral surface of the ring packing 7. On the other hand, in the case of the product of the present invention, the bleeding of the electrolyte was 0/50, and the effect was recognized. This is because, by forming the resin ring body 8 on the outer peripheral surface of the pole column 3 by insert molding, the liquid tightness between the outer peripheral surface of the pole column 3 and the resin ring body 8 is ensured, and the resin ring Since the surface of the body 8 is smooth, it can be said that liquid tightness between the outer peripheral surface of the resin ring body 8 and the inner peripheral surface of the packing 7 is also ensured.

  Furthermore, in the conventional case, the packing is damaged when the pole column moves up and down due to the fine irregularities on the surface of the pole column 3, resulting in a decrease in liquid tightness between the pole column 3 and the packing 7. However, in the case of the present invention, since the packing 7 is attached to the resin ring body 8 having a smooth surface, the damage of the packing 7 as described above can be reduced, and the liquid tightness is further improved. It was. Moreover, since the lubricity between the resin ring body 8 and the packing 7 is improved, it has been found that the vertical movement of the pole column 3 is performed more smoothly.

In addition, the conventional product sometimes had a phenomenon in which the pole 3 protruded abnormally during the vibration test, but the product of the present invention has a lower surface of the through-hole 2 when the pole 3 rises to a certain level or higher. 6 is locked by the conical ring-shaped locking body 12, the pole column 3 does not rise any further, and a stable state is obtained during the vibration test, and its effect can be confirmed. Further, after the test was completed, the lid 1 was removed and the outer peripheral surface of the packing 7 was observed. The effect of the present invention was confirmed also in this respect.
Further, in the examples, the method by insert molding was described as a method for forming the resin portion on the outer peripheral surface of the pole column, but the method is not limited to this method, and the cylindrical resin portion is inserted into the pole column, The inventors of the present application have confirmed that the same effect can be obtained by a method of injecting and fixing an adhesive into the gap between the resin portion and the pole column and securing liquid-tightness between the two.

  Although the lead storage battery has been described in the above embodiment, the present invention is applicable to all storage batteries in which the pole column inserted through the packing in the through hole provided in the lid is configured to be movable up and down. Nor.

The principal part schematic diagram which shows the lead acid battery of Example 7 based on this invention. The principal part schematic diagram (a) and partial enlarged schematic diagram (b) which show the terminal part of the lead acid battery of Example 8 based on this invention. The principal part front view (a) and principal part top view (b) which show the pole column of Example 1 by 1st invention. The principal part front view which shows the pole pole of Example 2 by 1st invention. The principal part front view (a) which shows the pole column of Example 3 by 1st invention, AA sectional drawing (b) of a front view (a), The principal part front view which shows the state which fitted packing (c) ) The principal part front view which shows the pole column of Example 4 by 2nd invention. The principal part front view which shows the pole column of Example 5 by 2nd invention. The principal part front view which shows the pole column of Example 6 by 3rd invention. The principal part schematic diagram which shows the structure of the lead acid battery of a conventional product.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cover 2 Through-hole provided in cover 3 Pole pole 31 Embedded nut provided in the upper surface of pole pole 4 Strap 5 Electrode plate group 6 Through-hole bottom face 7 Ring-shaped packing 8 Resin ring body 9 Along the outer peripheral surface of the resin ring body Recessed portion 91 Recessed portion provided on the upper surface of the resin ring body 92 Recessed portion provided on the lower surface of the cover for connecting rod 10 Battery case 11 Ring-shaped locking member 12 Conical ring-shaped locking member 13 Connecting rod 14 Bolt 15 For connecting rod cover

Claims (3)

In the storage battery in which the pole column inserted through the through hole provided in the lid is movable up and down,
A storage battery characterized in that a resin ring body fixed along the outer peripheral surface of the pole column is disposed between the packing and the pole column. 2. The storage battery according to claim 1, wherein a locking body that protrudes outward from the inner periphery of the through hole is provided at a position on the outer peripheral surface of the pole column and below the lower surface of the through hole. In the storage battery according to claim 1 or 2, wherein the storage batteries are connected via a connection rod, and the connection rod is covered with a connection rod cover.
A storage battery characterized in that a ring-shaped packing is sandwiched between a ring-shaped recess provided on the upper surface of the resin ring body and a ring-shaped recess provided on the lower surface of the connecting rod cover.

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