JPH0559543B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing a lead-acid battery, and more particularly to a method for forming a strap portion, an intermediate pole portion, and a terminal pole portion of a monoblock type lead-acid battery, and an improvement in a method for connecting straps. It is.

Conventional technology and its problems Conventionally, in monoblock lead-acid batteries, molten lead is poured into a fixed mold in which a recess for forming a strap part, a recess for forming an intermediate pole part, and a recess for forming a terminal pole part are engraved, and then the mold is Insert the ears of the electrode plate group fixed in the jig in advance, weld the strap and the ear parts, form the intermediate pole part and the terminal pole part at the same time, and fix the electrode plate group on a cell-by-cell basis. A manufacturing method was used in which the electrode plate group was taken out from a container and inserted into a battery case.

However, in this conventional manufacturing method, the molten lead is poured into a mold and then the ears of the electrode plate group are inserted into the mold, so the time required to pour the molten lead into the mold and The problem is that the tolerance range for the temperature of the molten lead and the time from when the molten lead is poured into the mold to when the electrode plate group is inserted into the mold is narrow, and the connection between the electrode plate ears and the strap is unstable. It was hot.

Further, in the above manufacturing process, the electrode plate group is inserted into a jig, the electrode plate group is inserted into a mold and after welding, the electrode plate group is taken out from the jig and the electrode plate group is inserted into a battery case. There is a task called. Therefore, it is necessary to make a jig for each type of battery, and a similar process of putting a group of electrode plates into a jig, taking out the group of electrode plates, and putting the group of electrode plates into a battery case is repeated. , the number of steps increases. Furthermore, there was a problem in that the increased number of steps reduced the reliability of product quality.

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional problems, and it is possible to reduce the number of processes and jigs and tools, and to produce lead under easy-to-control conditions, thereby producing an inexpensive and highly reliable lead. The purpose is to provide storage batteries.

Structure of the Invention The present invention is a method for manufacturing a lead-acid battery as described in the claims.

Embodiment An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an electrode group lug welding mold 4 having a recess 1 for forming a strap portion, a recess 2 for forming an intermediate pole portion, and a recess 3 for forming a terminal pole portion.

FIG. 2 shows the mold 4 immersed in molten lead 5. FIG. 3 shows the mold 4 having been pulled up from the molten lead 5, and the ears 8 of the electrode plate group 7, which has been inserted more than 1/2 of the way into the battery case 6, are inserted into the recesses for forming the strap part of the mold 4. It is. When inserting the electrode plate group 7 into the battery case 6, if you do not insert more than 1/2 of the total height of the electrode plate group 7 into the battery case 6, the ears will be damaged when the battery case 6 is turned upside down during welding. A problem arises in which the position shifts. FIG. 4 shows the state in which the battery 9 is returned to the upright state after welding is completed.

First, by immersing a mold 4 integrally provided with a strap part forming recess 1, an intermediate pole part forming recess 2, and a terminal pole part forming recess 3 into molten lead 5, each recess 1 of the mold 4 is formed. , 2 and 3 are filled with molten lead 5, the mold 4 is pulled out of the molten lead 5 while being maintained at a predetermined temperature, and then the strap portion forming recess of the mold 4 is filled with molten lead 5. After inserting the ears 8 of the positive and negative electrode plate groups 7 into the molten lead 5
By solidifying the material, the strap portion 10, intermediate pole portion 11, and terminal pole portion 12 welded to the ear portion 8 are simultaneously formed, and after welding is completed, the battery 9 is formed.

Compared to current products, the welded state of the plate group strap portion produced according to the present invention has no boundary line between the ears and the strap, and the welded state is stable. Furthermore, by inserting the electrode group into the battery case and welding the straps, there is no need to make a jig for each type of battery, and the process of inserting the electrode group is unified into one process, reducing the number of steps to one. decrease. Furthermore, since the straps are welded in the battery case, the positioning accuracy of the intermediate pole welding portion in the next step is increased.

Effects of the Invention As described above, the present invention can provide a lead-acid battery that is inexpensive and has good reliability.
Its industrial value is extremely large.

[Brief explanation of drawings]

Figure 1 is a partially cutaway perspective view of a strap welding mold, Figure 2 is a perspective view of mold temperature control and the mold is filled with molten lead, Figure 3 is a perspective view of strap welding, and Figure 4 is a perspective view of a strap welding mold. The figure is a perspective view of the battery after strap welding. DESCRIPTION OF SYMBOLS 1... Recessed part for forming a strap part, 2... Recessed part for forming an intermediate pole part, 3... Recessed part for forming a terminal pole part, 4... Mold, 5... Molten lead, 6... Battery container, 7...
...Electrode plate group, 8...Pole group ear part, 9...Battery.

Claims (1)

[Scope of Claims] 1. By immersing a mold integrally equipped with a recess for forming a strap part, a recess for forming an intermediate pole part, and a recess for forming a terminal pole part in molten lead, the melt is poured into each recess of the mold. After filling with lead, the mold is pulled out of the molten lead while being maintained at a predetermined temperature, and then the ears of the positive electrode plate group and the negative electrode plate group are placed in the strap forming recesses of the mold filled with molten lead. A method for producing a lead-acid battery, which comprises simultaneously forming a strap part, an intermediate pole part, and a terminal pole part welded to the ear part by solidifying the molten lead after insertion. 2. The method for manufacturing a lead-acid battery according to claim 1, wherein 1/2 or more of the height of the positive electrode plate group and the negative electrode plate group is inserted into the electric barrel.