JP2002245989A - Lead-acid battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lead-acid battery having long longevity and reliability with a polar pole through part structure endurable to force of elongation of a positive electrode lattice for long duration of service without sagging of a sealant due to slight positional slippage of the polar pole. SOLUTION: This lead-acid battery is furnished with a cylindrical body hanging down from a battery jar lid to pass through the polar pole, the sealant filled in the cylindrical body around the polar pole, a down-flowing sealant pan set around a lower part of the cylindrical body by being fitted on the polar pole and a down-flowing sealant filled in the down-flowing sealant pan, and at least a lower end part of the cylindrical body is buried in the down- flowing sealant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead-acid battery and, more particularly, to an improvement in a pole penetration portion.

[0002]

2. Description of the Related Art There are two types of conventional lead-acid battery pole pole penetration structures using lead bushings and packings (such as O-rings). For example, as shown in FIG. 2, as shown in FIG. 2, a pole pillar 1 made of a lead alloy is provided with a pole pillar opening 6 at a bottom portion for allowing a battery case lid 2 made of a thermoplastic resin to pass therethrough. Using a bottomed cylinder 9 that hangs down from the battery case lid 2, the space between the pole 1 and the through hole is closed with a rubber packing 8, and the inside of the cylinder 9 is filled with a sealing agent 7 made of a thermoplastic resin, and cured. I was

[0003]

However, in the conventional pole pole penetration portion of a lead-acid battery as shown in FIG. 2, the rubber packing 8 is inserted between the pole pole 1 and the through hole. However, there is a disadvantage that a slight displacement occurs between the pole 1 and the through-hole, and a gap is formed in the gap, and the sealing agent 7 drips into the lead storage battery when the sealing agent 7 made of a thermoplastic resin is filled.

[0004] In a lead-acid battery using a Ca-based alloy for the positive electrode grid, a phenomenon occurs in which the positive electrode grid is corroded and degraded over its service life and extended. Then, the force of this elongation is constantly applied to the pole post penetration portion. In the conventional pole post penetrating portion, the extension force is suppressed by the adhesive force between the pole 1 and the sealing agent 7 and the adhesive force between the cylinder 9 and the sealing agent 7.
However, since a sufficient sealing distance cannot be secured and the adhesive strength of the sealing agent 7 decreases with the use period, the reliability of the pole sealing portion is reduced for a lead storage battery having a long life of 10 years or more. Need to raise more.

When a lead bushing is used, a gap is formed between the resin lid and the lead bushing due to welding heat in an assembly welding process for joining the pole column and the lead bushing, and the sealing performance may be impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem. The present invention is directed to filling a sealing material into a cylindrical body around a pole and providing a downstream sealing material receiving tray to seal the sealing material therein. Filling agent eliminates the need for the assembly welding process, bushing, and packing, and allows the sealing distance to be secured with the downstream sealing agent tray and the downstream sealing agent, and the sealing agent drips due to slight displacement of the pole. An object of the present invention is to provide a pole column through-hole structure that can withstand the force of elongation of the positive electrode grid without a long period of use.

[0007]

According to the first aspect of the present invention, there is provided a tubular body hanging down from a battery case lid for penetrating a pole, and a sealing agent filled in the tubular body around the pole. A downstream sealing agent tray installed around the lower part of the cylindrical body by fitting to a pole, and a downstream sealing agent filled in the downstream sealing agent tray, At least the lower end of the body is a lead storage battery characterized by being embedded in the downstream sealing agent.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In a lead storage battery according to the present invention, a pole is passed through a through-hole at the lower part of a cylindrical body which hangs down from a battery case lid, and the cylindrical body around the pole is filled with a sealing agent. A downstream sealing agent tray having a through-hole is installed around the lower portion of the cylindrical body by fitting to the pole, and the downstream is filled with the sealing agent, and at least the lower end of the cylindrical body is downstream and closed. Be buried in the agent. By doing so, there is no need for an assembly welding process, bushing, packing,
Relatively simple structure, advantageous in terms of cost, etc.
A lead-acid battery capable of maintaining the reliability of the pole-pole penetration portion for a long period of time becomes possible.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments. FIG. 1 is a cross-sectional view of an essential part showing an embodiment of a pole column penetrating portion structure of a lead storage battery of the present invention. It is a downstream sealing agent receiving tray having a through-hole, and the receiving tray 3 is installed by penetrating the pole 1, and the receiving tray 3 is filled with a downstream sealing agent 4 made of a thermosetting resin, and a battery case lid is provided. The sealing material 7 was filled in the cylindrical body 5 around the pole 1 through the pole 1 through the through hole at the lower part of the cylindrical body 5 hanging down from 2. At least lower end 5a of cylindrical body 5
Was buried in the sealing agent 4 downstream.

In the present pole column penetrating portion structure, since the receiving tray 3 is fitted and installed on the pole column 1 by passing the pole column through the through hole, even if the position of the pole column 1 is displaced, the position of the pole 3 is not changed. There is no effect on the adhesion, so there is no danger of the sealing agent dripping into the storage battery, and the structure is less susceptible to elongation of the positive electrode grid. Therefore, it is considered that the present electrode pole penetrating portion structure could compensate for a decrease in the adhesive strength of the sealing agent 7.

[0011]

As described above, according to the lead storage battery having the pole column penetrating portion structure according to the present invention, the sealing agent does not drip due to the displacement of the pole and the lid, and the defective rate in the battery manufacturing process can be reduced. It has a structure that is less susceptible to the effects of reduction and the elongation of the positive grid,
There is an advantage that the reliability of the pole column penetration portion can be maintained. In addition, a new effect is obtained that the cost reduction effect that a rubber packing component is not required, and the abnormal corrosion of the pole due to a plasticizer (a reducing organic acid, a volatile organic material, etc.) eluted from the rubber are eliminated.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing an embodiment of a pole column penetration part structure of a lead storage battery of the present invention.

FIG. 2 is a view showing an example of a conventional pole storage battery through-pole structure;

[Description of Signs] 1 Polar column 2 Battery case lid 3 Downstream sealing agent receiving tray 4 Downstream sealing agent 5 Cylindrical body 5a Cylindrical body lower end 6 Through hole 7 Sealing agent 8 Rubber packing 9 Bottomed cylinder

Claims (1)

[Claims] 1. A cylindrical body that hangs down from a battery case lid for penetrating a pole, a sealing agent filled in the cylindrical body around the pole, and the cylindrical body which is fitted to the pole to fit the cylindrical body. A downstream sealing agent tray installed around the lower part of the body, comprising a downstream sealing agent filled in the downstream sealing agent tray, at least a lower end of the cylindrical body is in the downstream sealing agent. A lead storage battery characterized by being buried.