JPH0582118A - Terminal welding device for lead-acid battery - Google Patents

Abstract

PURPOSE:To form a lead-acid battery terminal having sufficient welding depth and excellent external appearance dimension by forming a sufficiently deep melting layer for a pole pillar and a bushing in the first stage, and finishing a terminal shape in the second stage. CONSTITUTION:In the case of welding a cap 1 and a bushing 2 by means of insert molding to each other, after a head part of a pole pillar 4 erected by being welded to a plate 3 inside of a battery so as to pass penetratingly through the bushing 2 and the bushing 2 are surrounded with a metal mold 5-2, these are fused to each other by means of a heating power of gas of a burner 6. A metal mold 5-1 is set sufficiently higher than the bushing 2 in the first stage, so that an accident, such as the metal mold becomes inseparable by such a reason that melting lead is overflowed from the metal mold due to the strong flames or the scattering of the lead, can be prevented. The metal mold 5-2 is set equal to or a little lower than the bushing 2 in the second stage, and the upper surface of the metal mold is set approximately horizontal, and it is heated to a degree such as to be protuberant shallowly on the metal mold due to surface tension by means of the weak flames, so that a terminal shape is adjusted. In the case where the burner 6 is moved slightly upward or downward in the first stage and is made one round along circumference of the bushing 2 in the second stage, the finish becomes excellent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for welding terminals of a lead storage battery, and a welding apparatus for providing a stable terminal finish.

[0002]

2. Description of the Related Art A terminal of a lead storage battery is generally loaded with an electrode group in a battery case as shown in FIG. 3 to form an electrical connection between the cells, and then connected to the plus or minus of the cells 3 at both ends. Then, the head of the pole 4 which has risen up is penetrated through the through hole of the lead bushing 2 insert-molded in the lid 1 of the battery when the lid is mounted, and the head of the pole and the bushing are surrounded by the mold 5. It is common that the burner 6 melts to form the terminal shape of the battery.

For this terminal welding, a welding station is usually provided at one place, and the bushing is held by a specific die,
Ignition of the burner, operation of the burning power and position of the burner, etc. are performed by an automatic terminal welding device equipped with a sequencer.

This may be a single piece of equipment as a welding apparatus, or may be installed as a partial functional equipment of another battery assembly apparatus.

In any case, in this type of welding, the weld between the head of the bushing and the head of the raised pole is the only electrically conductive part connected to the inside of the battery, and sometimes a large number of hundreds of amperes. Since it serves as a passageway for electricity, it is necessary to weld with a sufficient melting area, that is, a deep welding area.

On the other hand, the terminal finally formed controls a part of the external appearance of the battery itself and serves as an electrical connection port with the load device, so that it conforms to the standards established by each country or region such as JIS. In addition to doing, a beautiful shape without burr or deformation is required. However, in the past, an automatic welding device has not been able to obtain a satisfactory result, and in the finishing stage, an operator often reworked manually.

[0007]

It is quite difficult to make the welding depth and the welding shape compatible with each other. For example, when an attempt is made to obtain a sufficient welding depth, the burner jumps due to the strong gas pressure of the burner, I get drunk. In addition, if the die is formed into a scoop shape in order to return the jumping lead to the original molten area, the molten upper surface rises due to the surface tension, and when the die is removed, burrs are generated or the die becomes difficult to come off.

The present invention provides a terminal welding apparatus that achieves both a sufficient melting depth of the terminal welded portion and a beautiful finished appearance without burrs or the like.

[0009]

In order to solve the above-mentioned problems, a lead-acid battery terminal welding apparatus of the present invention includes a lead bushing insert-molded on a battery lid and a rising bushing welded to an electrode plate inside the battery. In the process of surrounding the head of the pole column that penetrates it with a mold and welding with a burner, the first welding station for obtaining the welding depth necessary to extract electricity and the terminal shape in terms of appearance and dimension (EN) An apparatus for performing welding by functionally dividing it into a second welding station for good finishing.

[0010]

In other words, in the conventional example, focusing on the point that it was unreasonable to perform the welding for obtaining the welding depth and the welding for obtaining the appearance under the similar conditions, it was decided that the welding station according to the present invention should be used. By securing the necessary welding depth by dividing it into two, and by securing the mold and conditions corresponding to the purpose of finishing the terminal shape to the prescribed, respectively,
It is possible to perform stable welding.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The features and functions of the construction of the welding apparatus according to the embodiments of the present invention will be described below. 1 and 2 show the first and second aspects of the present invention.
It is a figure explaining the characteristic and function of the composition of the terminal welding equipment provided with the two welding stations of above. FIG. 1 shows the state of the welding portion of the first welding station, and FIG. 2 shows the state of the welding portion of the second welding station.

In these figures, a lid 1 is provided with an insert-molded bushing 2. In order to weld this, in any case, the head of the pole 4 which is welded to the electrode plate 3 inside the battery and stands up and penetrates the bushing 2 and the bushing 2 are molded by a mold (5-1 in FIG. 1, FIG. 5 in 2
It is surrounded by 2) and melted by the gas fired power from the burner 6. In the conventional method shown in FIG. 3, the mold is in a scooped state in order to return the lead balls scattered by the fire of the burner to the original melting portion. This method seems to be fine. However, it is easy to obtain a sufficient welding depth by increasing the heating power, but lead that stirs and jumps due to the heating power during welding falls and adheres to the top of the bushing, and the molten surface solidifies in a wavy state. It is easy for burr to occur.

On the other hand, in the present invention, this welding is divided into two stations as shown in FIGS. 1 and 2, and the welding depth and the appearance can be made compatible by selecting the conditions suitable for the purpose of each station. That is, in order to obtain a sufficient welding depth, the die 5-1 of the first station is made sufficiently higher than the bushing 2 so that even if the molten lead is strong, it overflows from the die and spreads like a mushroom, and the die cannot come off. Or prevent flying lead from splashing around.

The purpose of the second station is to adjust the shape of the terminals, and it is desirable that the die 5-2 at this time is slightly lower than or substantially the same as the bushing. Also, the die 5-2.
The upper surface of the mold is made almost horizontal and heated by a weak heat to the extent that it rises up shallowly due to surface tension on the mold. According to this structure, when the mold is pulled out after welding, burrs are prevented from occurring and the shape is finished beautifully. If this is finished with a deep die as shown in 5-1 shown in FIG. 1, when the die is removed, the lead around the lead is dragged to generate burrs.

The burner 6 can be operated simply by moving up and down in the first station, whereas in the second station, it can be uniformly heated by rotating it at least once around the circumference of the upper surface of the bushing 5-2. Will be even better.

[0016]

As is apparent from the above description of the embodiments,
According to the present invention, in the terminal welding device for lead-acid batteries, the welding is divided into the first station and the second station, thereby making it possible to achieve both the necessary welding depth and a beautiful finished shape without burrs, and reworking work. Is also unnecessary, the reliability of the welding of the terminal portion is improved, and the productivity is improved, and its industrial value is extremely large.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a first station of a terminal welding device having two welding stations of the present invention.

FIG. 2 is a diagram for explaining the second station.

FIG. 3 is an explanatory view of a welding mechanism of a conventional automatic welding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lid 2 Bushing 3 Electrode plate group 4 Polar column 5 Mold 5-1 Mold of 1st station 5-2 Mold of 2nd station 6 Burner

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Susumu Waki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A lead bushing insert-molded on a battery lid and a head of a pole pillar which is welded to an electrode plate inside the battery and penetrates the bushing are surrounded by a mold and melted by a burner to simultaneously melt the battery. A terminal welding device for a lead storage battery, which is a device for forming a terminal and includes a rough first welding station for forming a deep molten layer and a second welding station for finishing a terminal shape. 2. The terminal welding device for a lead acid battery according to claim 1, wherein the upper surface of the mold of the second welding station is substantially horizontal, and the height thereof is lower than the terminal to be formed. 3. The lead-acid battery terminal welding device according to claim 1, further comprising a burner operating mechanism for rotating the flame of the burner at least once around the circumference of the mold in the second welding station.