JPS60200458A - Manufacture of storage battery - Google Patents

Abstract

PURPOSE:To eliminate occurrence of casting defects, by press-stamping glass frame-shaped pieces out of a lead plate and piling several pieces of them to be integrated in one body by electric resistance welding, to form a connecting rod. CONSTITUTION:Plural pieces of plate 9 formed by press-stamping them out of a lead plate are piled in a lay form, and both sides of a piled layer surface is sandwiched by electrode 10 and 10' of an electric resistance welder, and pressing force is applied thereon, and the piled layer are welded by electric resistance welder, and a connecting rod is formed by integrating them together. An insertion opening 6 of such a connecting rod is fitted around an electrode column, and a connection part is formed by fixing both materials together by welding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the method of connecting a plurality of individual cells using connecting rods when used as a collective storage battery.

Conventionally, the connection method between single cells in this type of storage battery is as follows:
As shown in the figure, after inserting the pole pole 1.1' installed in the pole plate group into the pole pole insertion opening 3 formed on the surface of the battery case top lid 2, the pole pole 1.1' and the pole pole The rubber backing 4 is fitted into the gap with the insertion opening 3, and then the insertion opening 6 of the connecting rod 5 shaped like an eyeglass frame is inserted into the pole post 1.1', and the two are welded to form the fixed part 7. A connecting method is used in which a connecting rod 8 is formed, but when using these methods, molten lead is flowed in advance into a mold for forming a connecting rod in the shape of an eyeglass frame to form a connecting rod 5. is cast and placed, and the connection part 8
In forming and manufacturing, it is necessary to melt and bond the pole pillar 1.1' again, which has the disadvantage that accidents such as poor welding often occur.

The present invention eliminates the above-mentioned drawbacks, and instead of using a connecting rod shaped like an eyeglass frame that is cast in advance, a lead plate with a thickness of about 1 to 3 mm is pressed and punched into the shape of an eyeglass frame. A connecting rod is formed by stacking several layers with the required cross-sectional area and welding them together at high heat using electrical resistance, and then inserting this into a pole pole in the same way as conventional connection formation, and melting and fixing it to form a connection. The present invention provides a method for manufacturing a storage battery.

An example of the present invention will be described using FIG. 1.
．． 1' is a pole pole 1.1' which has a common pole insertion opening 3 bored in the battery case top cover 2, and into which the pole insertion opening 3 can be inserted.
A rubber backing 4 fitted into the pole post insertion hole 3 is fitted on the circumferential surface of the battery case-cover 2 and on the top surface of the rubber backing 4. The connection rods 5 are made of lead having an arbitrary thickness of approximately 1 to 3 mm. A template 9 is prepared by pressing and punching out the plate in the shape shown in FIG. 4. A plurality of the templates 9 are overlapped and the layered surfaces are electrically resistance welded from both ends as shown in FIG. 3. By sandwiching the templates 9 with the electrodes 10 and 10' of the machine and applying a large current while applying a pressing force in the direction of pressure (in the direction of the solid line arrow), the plurality of templates 9 will be connected to the joints 11 of the adjacent plate surfaces. The connecting rods 5' are electrically resistance welded at the same time as they are pressurized by the resistance heat generated by the applied current, and a connecting rod 5' having a layer thickness corresponding to the number of connecting rods 5' is formed. Similarly, a storage battery is manufactured by a connection method in which the fitting opening 6 is fitted into the pole post 1.1' and the two are welded and fixed to form a connecting part 8 having a fixed part 7.

In the present invention, the connecting rod is not manufactured by casting molding with lead alloy, but by punching out a lead plate to make a lead mold plate, stacking a plurality of them, and applying pressure to the overlapping surface to form the plate surface. A connecting rod having the required cross-sectional area is made by electric resistance welding by applying an applied current, and can prevent casting defects such as casting sink marks and discoloration, which occur when connecting rods are cast using conventional molten lead casting methods. The industrial value is extremely large.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the main parts of the unit cell surface connection state in the conventional storage battery manufacturing method, Fig. 2 is a perspective view of the conventional connecting rod, and Fig. 3 is a lead mold plate according to the storage battery manufacturing method of the present invention. FIG. 4 is a cross-sectional view showing a state in which a plurality of templates are superposed and sandwiched between electrodes, and FIG. 4 is a plan view of a template used in the present invention. 5' is the connecting rod, 9 is the template, 10.10' is the electrode section 1, Figure 2, Figure 3, Figure 4.

Claims (1)

[Claims] Templates with fitting holes at both ends are overlapped and sandwiched between the electrodes of an electric resistance welding machine, and an applied current is applied without applying pressure to create a bond between the surfaces of the templates due to the resistance heat generated. A method for manufacturing a storage battery, characterized in that adjacent cells are connected using connecting rods that are welded together.