DD255620A1 - GRID PLATE FOR LEAD CELLULATORS - Google Patents

Abstract

The invention relates to a grid plate for lead-acid batteries, in which the active material is introduced in paste form in the grid and electrically formed. According to the invention, tapered casting metal continues 4 are arranged on grid elements 2 in a grid clearance 1. It is thereby achieved that the distance of any active mass particle from the lattice material in the lattice free space 1 does not increase in spite of the increased lattice width B compared to conventional lattice geometries. As a result, a considerable saving in grid material without deterioration of the electrical properties is achieved. Due to the design of the grid plate with Giessmetallfortsaetzen 4 formschlüssiges connection between the grid and active mass is significantly improved.

Description

According to the invention the object is achieved in that are arranged on grid elements in a grid clearance, tapered Gießmetallfortsätze. A manufacturing technology favorable embodiment provides that the Gießmetallfortsätze have a circular arc in longitudinal section on a, a lattice outer surface opposite the larger width side. Adjacent and opposing Gießmetallfortsätze are preferably arranged so that within the lattice free space adjacent to a short a long part of Gießmetallfortsatzes or opposite and vice versa. But also a symmetrical arrangement of Gießmetallfortsätze is possible.

This ensures that the distance of any active mass particle from the grid material in the grid clearance despite increased grid width B compared to conventional grid geometries does not increase, d. H. by the inventive arrangement of Gießmetallfortsätze the enlarged grating space is divided so that even in the worst case this

Distance is not greater than - conventional grid geometries.

As a result, a significant saving in grid material is made possible without a deterioration of the electrical properties of the grid plate due to the increased grid clearance must be taken into account. Due to the inventive design of the grid plate with Gießmetallfortsätzen the positive connection of the grid is significantly improved with the active mass, since they allow a piercing into the active material.

embodiment

The invention will be explained in more detail in the following embodiment. Fig. 1 shows a plan view of an inventively designed grid plate from the side, which faces the grid outer surface, on which the grid elements have their greatest width. FIG. 2 shows a section through the division plane indicated in FIG. 1. At the horizontal grid elements 2, tapered casting metal extensions 4 are arranged asymmetrically at intervals of a quarter grid length L in the grid clearance 1. As further shown in FIG. 1, adjacent and opposing cast metal extensions 4 are arranged so that in the grate space 1, a short portion of the cast metal extension 4 is adjacent or opposed, and vice versa. In a grid clearance 1, for example, 20mm width and 10mm height with 6 Gießmetallfortsätzen of 2.5mm in length, this is so divided that the maximum distance of an active mass particle of the grid material is 2.5 mm and thus excellent current dissipation conditions exist, for a good starting behavior of a Such a grid plate manufactured accumulator are necessary. The amount of lattice material required for the design of the grid plate according to the invention is only 80% of the geometry usual for a grid plate. , ,

Advantageously, the casting metal extensions 4 ending in the grate clearance 1 are brought into a position between the two grille outer surfaces 3 and 5 in a subsequent operation, since an improved looping of these extensions 4 through the active mass takes place in this manner. It is of particular importance that the longitudinal section of these Gießmetallfortsätze 4 on the, the grating outer surface opposite side 5 has a circular arc, because thereby the ends of the Gießmetallfortsätze 4 are not moved to the opposite outside of the grid plate, but remain with certainty in this intermediate position and thus cause the improved mass retention.

In such a prefabricated grid plate, the active mass is then pressed in a Pastierarbeitsgang of the grid outer surface 3 ago by a Pastierwalze, as a result of the mass movement during Einwalzprozeß a wrap of the different cross sections of Gießmetallfortsätze 4 or a piercing into the fibrous active mass structure and thus an excellent , permanent mass holder causes. In addition, an occurring torsion of Gießmetallfortsätze 4 supporting grid elements 2 favor the mass holder.

Claims (3)

1. grid plate for lead-acid batteries, consisting of a plurality of intersecting at an angle grating elements for receiving Pastierungsmasse, characterized in that the grid elements (2) in a grid-free space (1) ending, tapered Gießmetallfortsätze (4) are arranged. 2. Grid plate according to claim 1, characterized in that the Gießmetallfortsätze (4) in longitudinal section on a, a grid outer surface (3) opposite side (5), have a circular arc. 3. grid plate according to claim 1, characterized in that adjacent and opposing Gießmetallfortsätze (4) are arranged such that in the lattice free space (1) is a short a long part of Gießmetallfortsatzes (4) adjacent or opposite and vice versa. For this 1 page drawing Field of application of the invention The invention relates to a grid plate for lead-acid batteries, in which the active material is introduced in paste form in the grid and electrically formed. Characteristic of the known state of the art There are a variety of technical solutions to the geometry of grid plates for lead-acid batteries known. These consist of a plurality of angle-cutting, mostly cast webs, which form the grid for receiving Pastierungsmasse. For reasons of applicability of productive production methods, material savings and favorable demolding behavior, grid plates are designed in such a way that the individual grid elements reach as far as a grid outer surface, which represents the shaping graduation plane, and have their greatest width there (WP H 01 M / 2837855). The disadvantage of such grid plates is that due to the one-sided position of the mold dividing plane no positive connection between the introduced active mass and grating clearance, whereby a permanent mass holder is impaired. The small grid widths B used for securing a good current section from the active mass via the grid elements to the grid lug are also insufficient for this. Also known for such grid plates, a method for producing a positive connection of the active material with the grid (DE-OS 2346432). This is achieved by moving selected lattice webs out of said plane by deforming and / or deforming the cross-section of the webs in such a way that the usual mass-holding geometries in which the active mass virtually passes as a band through the lattice bars are produced. The disadvantage is that in these grid geometries a high degree of positional match between mold and profiling group is required, which is not feasible in practice under highly productive production conditions. Furthermore, this solution adheres to the lack of that in Pastiervorgang no real wrap and fiber interweaving occurs around the bars, since the active material has a certain rigidity. Object of the invention The aim of the invention is a more favorable design of grid plates with grid elements, which reach up to a grid outer surface, which represents the mold division level, and there have their greatest width. Explanation of the essence of the invention Based on the technical causes of the deficiencies of the known solutions, the invention is based on the object to enable a sufficiently positive connection of the grid with the active mass in its simultaneous emaciation.