JP3646521B2 - Battery pole sealing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for sealing a pole of a storage battery, in particular, a sealed lead-acid battery, and relates to a method for sealing a pole column penetrating a battery case and extending upward in a liquid-tight and air-tight manner.
[0002]
[Prior art and its problems]
The sealed lead-acid battery is required to be completely sealed except for the safety valve so that oxygen gas does not enter the battery container from the outside. For this reason, as shown in FIG. 5, as a conventional method of sealing the pole pole, a rubber packing material such as an O (O) ring 11 is formed by penetrating the pole pole 1 through a through hole 4 provided in the lid 2 and projecting upward. Is fitted to the pole 1 to cover the gap 6 between the through-hole 4 and the pole 1 from above, and the adhesive 10 is filled in the recess 3 provided so as to surround the pole 1 and solidified, As shown in FIG. 6, the pole 1 having a larger diameter than the through-hole 4 of the lid 2 is directly passed through the through-hole 4 without using the O-ring 11 or the like, and a high-viscosity adhesive 10 is put into the recess 3 . A method of filling and solidifying was adopted.
[0003]
However, since the O-ring 11 is used in the former method, the adhesion area between the pole column 1 and the lid 2 is reduced, the adhesive strength is insufficient, and the adhesive is easily peeled off, so that the electrolyte leaks out. It became easy. Further, the adhesive 10 leaked into the battery from the gap 6 between the through hole 4 and the pole column 1 and adhered to the upper part of the electrode plate group, thereby deteriorating the utilization factor of the electrode plate and causing a decrease in the battery capacity. Furthermore, there is a problem that the portion of the pole 1 that contacts the O-ring 11 corrodes.
[0004]
On the other hand, in the latter method, the surface of the pole column 1 is scratched by the through-hole 4, or the pole column 1 is deformed and the pole column 1 does not adhere to the through-hole 4, and the adhesive 10 leaks into the battery. As in the former method, the battery capacity decreased. Moreover, since the viscosity of the adhesive agent 10 is high, handling is troublesome, and the adhesive effect between the adhesive agent 10 and the pole column 1 and the lid 2 is insufficient.
[0005]
As another method, as shown in FIG. 7, a recess 3 is provided on the back surface of the lid 1, the lid 2 is disposed in the reverse direction, and the adhesive 10 is filled in the recess 3, and then the pole group is stored. The battery case 5 is turned upside down and the tip of the pole 1 is inserted into the adhesive 10 and the battery case 5 and the lid 2 are fitted and bonded to solidify. Thereafter, a method has been proposed in which the upper portion (AA ′) of the pole column 1 is removed with a drill or the like, the tip portion of the pole column 1 is exposed, and soldered to the lead wire.
[0006]
However, this method has a problem that the work of cutting the terminal tip with a drill and the soldering work are difficult, and the productivity is low.
[0007]
An object of the present invention is to solve the above-described problems, and to provide a method for sealing an electrode pole of a storage battery that has high productivity and excellent reliability.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention, for example, allows the pole column 1 that gradually becomes thinner from the base toward the tip to pass through the through hole 4 of the lid 2, and then uses the cylindrical jig 7 to form the pole column 1. The pole facing the through hole 4 by pressing the peripheral surface of the pole column 1 from the tip of the electrode toward the base and pushing the peripheral surface of the pole column thicker than the inner diameter of the cylindrical jig toward the through hole The peripheral surface of the pillar 1 is bulged, and the bulging portion 8 seals the gap 6 between the through-hole 4 and the pole pillar 1.
[0009]
And when pressing a surrounding surface toward the root from the front-end | tip of the said pole 1, it is preferable to rotate the cylindrical jig | tool 7 and press a surrounding surface.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0011]
FIG. 1 is a cross-sectional view of a main part showing a state where a pole column is passed through a through hole of a battery case in an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part showing a state where the peripheral surface of the pole column is also pressed 3 is a cross-sectional view of the main part showing a state in which the peripheral surface of the pole column is bulged and the gap between the pole column and the through hole is sealed, and FIG. 4 is also shown in FIG. It is principal part sectional drawing which shows the state with which the adhesive agent was filled.
[0012]
Reference numeral 1 denotes a pole, which is gradually thinner from the root toward the tip as shown in the figure, for example, and in this embodiment is a cylindrical column made of lead or a lead alloy. Reference numeral 2 denotes a lid, which is made of a thermoplastic resin, has a recess 3 formed on the upper surface, and has a through-hole 4 through which the pole column 1 passes. Reference numeral 5 denotes a battery case made of the same material as the lid 2, and accommodates a pole group (not shown) having the pole column 1 therein.
Sealing the pole 1 according to the present invention goes through the steps of FIGS. That is, as shown in FIG. 1, the pole 1 protruding upward from the pole group housed in the battery case 5 is protruded into the recess 3 of the lid 2 through the through hole 4 of the lid 2. At this time, for example, if the gradient of the circumferential surface of the pole 1 is 1/10 and the diameter d of the circumferential surface of the pole 1 facing the through hole 4 is 10 mm, the diameter d ′ of the through hole is set to about 11 mm. A slight gap 6 is formed between 4 and the pole 1.
[0013]
Next, as shown in FIG. 2, a spatula pressing jig 7 is inserted from the tip of the pole column 1 toward the base, and the peripheral surface of the pole column 1 is pressed downward by the tip of the jig 7. The jig 7 is cylindrical, and the inner diameter of the jig 7 is preferably about 9.8 mm if the dimensions of the pole column 1 are as described above. Moreover, it is good to rotate the jig | tool 7 at 100-300 rpm so that when the surrounding surface of the pole 1 is pushed down, the whole pole 1 is not pushed down inside a battery. When the jig 8 is rotated and pushed down in this way, the spreadability of lead or lead alloy can be used, the force of pushing down the entire pole column 1 is weakened, and a strap (not shown) that supports the pole column 1 is used. Will not be damaged or misaligned.
[0014]
Thus, when the jig 7 is pushed down until the tip of the jig 7 is in contact with the bottom surface of the recess 3 of the lid 2, the peripheral surface of the pole 1 thicker than the inner diameter of the jig 7 is pushed toward the through hole 4. The extruded portion swells and fills in the gap 6 between the through hole 4 and the pole 1, and the gap 6 is completely sealed by the bulged portion 8 when the tip of the jig 7 comes into contact with the bottom surface of the recess 3. This state is shown in FIG.
[0015]
Next, as shown in FIG. 4, one end of the output terminal 9 is applied to the tip of the pole column 1 and connected by soldering. Thereafter, the adhesive 10 is poured into the recess 3, and the entire pole column 1 on the through hole 4 including the connection portion between the output terminal 9 and the pole column 1 is covered with the adhesive 10 and solidified. Note that the other end of the output terminal 9 is protruded from the upper surface of the lid outside the recess 3.
[0016]
Thus, if the pole pole sealing method of this invention is performed, the adhesive agent 10 will not leak from the clearance gap 6, and the storage battery excellent in capacity | capacitance can be provided. In addition, parts such as an O-ring are not required, and the pole column is not corroded. Furthermore, there is no need for rework due to poor mounting of O-rings, etc., resulting in excellent productivity.
[0017]
In the present embodiment, the shape of the pole column is gradually narrowed from the root to the tip. However, the tip may be slightly narrowed or may have the same diameter from the root to the tip. In this case, the inner diameter of the jig may be tapered.
[0018]
【The invention's effect】
As described above in detail, according to claim 1 of the present invention, the adhesive does not leak from the gap between the through hole and the pole column, the pole column does not corrode, and can be easily produced by a jig. An inexpensive storage battery having excellent reliability can be provided.
[0019]
Further, according to claim 2, in addition to the effect of claim 1, since the entire pole pole is not pushed down into the battery, the storage battery excellent in reliability that does not damage the battery or adversely affect the battery performance. Can provide.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part in which a pole column is passed through a through hole of a lid, showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of an essential part in which a peripheral surface of a pole pole is pressed and expanded in the same manner.
FIG. 3 is a cross-sectional view of the main part immediately after sealing the gap between the through hole and the pole column with the bulging part of the peripheral surface of the pole column.
FIG. 4 is a cross-sectional view of a principal part in which an adhesive is injected into a recess after an output terminal is attached to the tip of a pole pole.
FIG. 5 is a cross-sectional view of an essential part showing a conventional method in which a pole column is sealed using an O-ring.
FIG. 6 is a cross-sectional view of a principal part showing a conventional method in which a pole column is sealed only with an adhesive.
FIG. 7 is a cross-sectional view of an essential part showing a conventional method for scraping off a pole column in a recess on the back of a lid.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Polar pole 2 Lid 4 Through-hole 6 Crevice 7 between a through-hole and a polar pole Jig 8 A bulging part

Claims (2)

After penetrating the pole through the through hole of the lid, the cylindrical jig presses the peripheral surface of the pole from the tip of the pole to the root direction, and is thicker than the inner diameter of the cylindrical jig The peripheral surface of the polar column facing the through hole is expanded by pushing the peripheral surface of the polar column toward the through hole, and the gap between the through hole and the polar column is sealed by the bulging portion. A method for sealing a pole of a storage battery. Wherein toward the tip of the pole at the base, pole pillar sealing method of battery of claim 1, wherein pressing the peripheral surface of the pole by rotating the circular cylindrical jig.

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