JPH09312151A - Storage battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of leakage of the electrolyte from a pole part by setting a flange part of a bushing and a part of the bushing continued thereto into the specified shape structure. SOLUTION: A battery jar lid 2 made of a synthetic resin is provided with a pole part 1 formed of a boss part 2a. A bushing 3 made of lead or a lead alloy is integrally formed with a cylindrical part 3a, plural annular projecting parts 3b and a flange part 3c, and embedded in the boss part 2a. A pole 5 made of lead or lead alloy is inserted into a hole 3d of the bushing 3, and a tip 5a thereof is melted inside a hole 4a of a terminal, which is 4 made of lead or lead alloy, so as to be fixed to the terminal 4. At this stage, thickness (t) of the flange part 3c is set so that the volume V2 of the flange part 3c becomes 7-13 times of the volume V1 of the adjacent annular projecting part 3b. Heat conduction of the fusion bonding between the pole 5 and the terminal is reduced by increasing the heat capacity of the flange part 3c, and generation of peeling of a bonding part between the annular projecting part 3b and the battery jar lid 2 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage battery, and more particularly to an improvement of a pole mounting portion provided on a battery case lid.

[0002]

2. Description of the Related Art A pole mounting portion 1 in a conventional general storage battery is provided on a battery case lid 2 made of synthetic resin, as shown in FIG. In the pole mounting portion 1, a plurality of annular projections 3b are integrally provided on the outer periphery of the tubular portion 3a at intervals in the axial direction, and a flange portion 3c is integrally provided at the tip of the tubular portion 3a. The end face 3c 'of the flange 3c is exposed and the bushing 3 made of lead or lead alloy is buried in the boss 2a of the battery case lid 2 and the end face 3c' of the flange 3c. Lead 4 mounted on lead or lead alloy and lead fixed to the terminal 4 by passing through the hole 3d of the tubular portion 3a of the bushing 3 and melting the tip 5a in the hole 4a of the terminal 4. Alternatively, it is provided with the pole column 5 made of lead alloy. The terminal 4 has a rising portion 4b, and the connecting hole 4c is provided in the rising portion 4b.

[0003]

However, in the conventional battery having the pole pillar mounting portion 1 having such a structure, the tip 5a of the pole pillar 5 is melted in the hole 4a of the terminal 4 and the terminal 4 is melted.
When connecting with the flange 3, heat for melting the tip 5a of the pole 5 passes through the flange 3c of the bushing 3 and the flange 3c.
c reaches the joint portion 6 between the boss portion 2a of the battery case lid 2, and the joint portion 6 is thermally affected by this heat so that the flange portion 3c is partially peeled from the boss portion 2a of the battery case lid 2. It will be easier. When the flange portion 3c is separated from the boss portion 2a of the battery case lid 2,
The airtightness of the pole mounting portion 1 may be impaired, and electrolyte leakage in the battery case may occur.

It is an object of the present invention to provide a storage battery capable of preventing the flange portion of the bushing from peeling off from the battery case lid due to heat generated when the terminal is attached to the tip of the pole.

[0005]

According to the present invention, a pole-column mounting portion is provided on a battery case lid, and the pole-column mounting portion is provided with a plurality of annular projections on the outer periphery of a cylindrical portion at intervals in the axial direction. It has a structure in which a flange portion is integrally provided at the tip of the cylindrical portion, and the bushing is embedded in the battery case lid by exposing the end surface of the flange portion and the end surface of the flange portion. An improvement of a storage battery including a mounted terminal and a pole column which is passed through a hole of a cylindrical portion of a bushing and whose tip is melted in the hole of the terminal and fixed to the terminal. Is.

In the storage battery according to the first aspect of the present invention, the heat transmitted when the tip portion of the pole is melted does not cause peeling at the joint between the annular projection of the bushing and the battery case lid. The volume of the flange portion of the bushing is set.

As described above, the volume of the flange portion of the bushing is adjusted to such an extent that peeling does not occur at the joint between the annular projection of the bushing and the battery case lid due to the heat conducted when the tip portion of the pole is melted. When set, the heat capacity of the flange portion of the bushing increases, the amount of heat transferred to the joint between the flange portion of the bushing and the battery case lid decreases, and the flange portion of the bushing can be prevented from peeling from the battery case lid.

In the storage battery according to the second aspect of the present invention, the bushing is made of lead or lead alloy, and the volume of the flange portion of the bushing is set to 7 to 13 times the volume of the annular protrusion next to the flange portion. It is characterized by

When the volume of the flange portion of the bushing is set to 7 to 13 times the volume of the annular protrusion next to the flange portion in this way, the heat capacity of the flange portion of the bushing increases in an effective range, The amount of heat transferred to the joint between the flange portion of the bushing and the battery case lid is reliably reduced, and the flange portion of the bushing can be reliably prevented from peeling off from the battery case lid.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of an embodiment of a pole mounting portion in a storage battery according to the present invention.

In the storage battery of this example, the pole mounting portion 1
Is provided on the battery case lid 2 made of synthetic resin as shown in the figure. In the pole mounting portion 1, four annular projections 3b are integrally provided on the outer periphery of the tubular portion 3a with an interval in the axial direction, and a flange portion 3c is integrally provided at the tip of the tubular portion 3a. The end surface 3 of the flange portion 3c.
a bushing 3 made of lead or lead alloy embedded in the boss portion 2a of the battery case lid 2 with the c'exposed, and a terminal 4 made of lead or lead alloy placed on the end surface 3c 'of the flange portion 3c;
And a pole column 5 made of lead or lead alloy, which is passed through the hole 3d of the tubular portion 3a of the bushing 3 and has its tip 5a melted in the hole 4a of the terminal 4 and fixed to the terminal 4. This is the same as in FIG. Further, the terminal 4 is provided with a rising portion 4b, and the connecting hole 4c is formed in the rising portion 4b.
The point that is provided is similar to that of FIG.

In this example, the annular projection 3 of the bushing 3 is heated by the heat conducted when the tip 5a of the pole 5 is melted.
The volume V2 of the flange portion 3c of the bushing 3 is set to such an extent that peeling does not occur at the joint 6 between the b and the battery case lid 2. The volume V2 of the flange portion 3c of the bushing 3 is
7 to the volume V1 of the annular projection 3b next to the flange 3c.
It is preferable to set it to 13 times. The volume of the remaining annular protrusion 3b is the same as the volume V1 of the annular protrusion 3b next to the flange portion 3c in this example, but may be different.

Thus, the flange portion 3c of the bushing 3 is
In order to confirm the effect of setting the volume V2 of the bushing 3 to the volume V1 of the annular projection 3b next to the flange 3c, the volume V2 of the flange 3c of the bushing 3 is set to the volume V1 next to the flange 3c. 4 times the volume V1 of the protrusion 3b, 6
Double, 7 times, 10 times, 13 times and 14 times the pole-column mounting parts 1 are formed respectively, and the lower part of these pole-column mounting parts 1 is immersed in dilute sulfuric acid to pass an electric current through the pole columns 5, It was observed that sulfuric acid climbed up to the joint 6 between the flange 3c and the boss 2a of the battery case lid 2.

As a result, it was confirmed that the ones with 4 times and 6 times the volume had a rise in dilute sulfuric acid, but those with a volume of 7 times, 10 times, and 13 times did not have a rise in dilute sulfuric acid. . On the other hand, when it is 14 times or more, it was found that the thickness t of the flange portion 3c becomes too large and the castability of the bushing 3 deteriorates.

[0015]

In the storage battery according to the first aspect of the present invention, to the extent that peeling does not occur at the joint between the annular projection of the bushing and the battery case lid due to the heat conducted when the tip of the pole is melted. Since the volume of the flange of the bushing is set to
The heat capacity of the flange portion of the bushing increases, the amount of heat transferred to the joint between the flange portion of the bushing and the battery case lid decreases, and it is possible to prevent the flange portion of the bushing from peeling off from the battery case lid. .

In the storage battery according to the present invention, since the volume of the flange portion of the bushing is set to 7 to 13 times the volume of the annular projection next to the flange portion, the heat capacity of the flange portion of the bushing is set. Is increased in an effective range, the amount of heat transferred to the joint between the flange portion of the bushing and the battery case lid is surely reduced, and the flange portion of the bushing can be reliably prevented from peeling from the battery case lid.

Therefore, according to the present invention, the leakage of the electrolytic solution from the pole mounting portion can be eliminated.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an example of an embodiment of a pole mounting portion in a storage battery according to the present invention.

FIG. 2 is a vertical cross-sectional view of a pole mounting portion in a conventional storage battery.

[Explanation of symbols]

 1 pole post attachment part 2 battery case lid 2a boss part 3 bushing 3a tubular part 3b annular protrusion 3c flange part 3c 'end face of flange part 4 terminal 4a hole 4b rising part 4c connection hole 5 pole post 5a tip part 6 connection Department

Claims (2)

[Claims] 1. A battery case lid is provided with a pole mounting portion, and the pole mounting portion is integrally provided with a plurality of annular protrusions on an outer periphery of a cylindrical portion at intervals in the axial direction thereof. A flange portion is integrally provided at the tip of the groove-like portion, and a bushing that is embedded in the battery case lid by exposing the end surface of the flange portion and a terminal placed on the end surface of the flange portion. And a pole column that is passed through the hole of the tubular portion of the bushing and has its tip portion melted in the hole of the terminal and fixed to the terminal, the tip of the pole column. The volume of the flange portion of the bushing is set to such an extent that peeling does not occur at the joint between the annular protrusion of the bushing and the battery case lid due to heat conducted when the portion melts. Storage battery. 2. The bushing is made of lead or a lead alloy, and the volume of the flange portion of the bushing is set to 7 to 13 times the volume of the annular protrusion next to the flange portion. The storage battery according to claim 1.