DK150869B - MULTIPLE CELL BLYACUMULATOR AND METHOD FOR PREPARING THE SAME. - Google Patents

Description

in 150869

The invention relates to a multi-cell lead accumulator with electrode blocks in the form of zigzag-like for a package of folded positive and negative band electrodes with intermediate separators.

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Within the accumulator area, most innovations have benefited the actual product. For example, maintenance-free starter batteries have been developed.

The manufacturing process, on the other hand, is virtually unchanged in that it encompasses the same work processes such as lattice casting, machining, propagation, assembly and incorporation of plate blocks, etc. Although there are mechanical auxiliaries, many of these work processes must be performed manually and even on the individual electrodes, so that the workflow becomes discontinuous, limiting the production speed.

A more rational manufacturing technique has only gained in connection with the so-called small accumulators, which will easily be able to mass advance in 11 es. These small accumulators include 20 alkaline small accumulators as well as small lead cells with wound electrode units. In these electrode units, a positive and a negative electrode band, while inserting a separator, is wound to an electrode winding and placed in the cell container. At the edges of the electrode there are connection terminals which can be passed through the container. Due to the difficulties of terminal feed-throughs, wound electrode units of this kind are generally used only in connection with single-cell accumulators, 3Q. Also, in connection with the electrode plates, the heavy mass carriers tend to be replaced, ie. cast lead grids with light skeletal structures that e.g. can be made of rolled metal. Rolled metal can also be manufactured in endless ribbons.

However, electrode sheets made of rolled metal, which are packed in conventional manner and inserted into upwardly open containers, do not represent any significant progress in the manufacturing process.

2 150869

An attempt has been made to provide a more convenient connection between the individual accumulator cells by renouncing on one surface of the individual cell a number of interconnected cells - cf. U.S. Patent No. 3,844,841. This connection 5 is made possible by a slight cup-shaped extension of the side walls, whereby the side walls with the extended edge can intervene over a corresponding extended neighbor cell. However, the resulting plug connection is not entirely satisfactory in terms of contact and electrolyte density of the housing.

The object of the invention is to provide a lead accumulator which is better suited for mass production than hitherto known, and this object is achieved according to the invention by adjacent accumulator cells being electrically connected via a large surface, through the partition, carrying the support skeleton for one of the tape electrodes, and by forming the cap of the block box by a side wall perpendicular to the plane of the electrodes.

In a preferred embodiment of the accumulator, each of the one-cell plate blocks consists of zigzag-shaped, folded, positive and negative band electrodes with intermediate band-shaped separators. Both interconnections between the cells and external electrical connections are established via large-flat areas, across the partitions and 25 outer walls, respectively, areas of one of the two electrode support grids. These areas are at the same time in the closing plane of the block box, which is closed liquid-tight by a side wall by a mirror welding.

The invention also relates to a method of producing a multi-cell lead accumulator in which the electrode blocks consisting of positive and negative tape electrodes and intermediate separators are folded into a zigzag-shaped package and inserted into the block box. The method is characterized in that the large-flat electrode support skeleton passing through the partition or outer wall of the block box is provided with correspondingly divided areas free of active mass, that the corresponding parallel sections of the model electrode are completely removed and that the lateral openings of the block box are then removed. liquid-tight is closed by welding a sidewall. Thereby, a particularly convenient method is obtained for the preparation of a multi-cell lead accumulator.

The invention will be explained in more detail below with reference to the drawings, wherein

FIG. 1 shows a lead accumulator according to the invention, the individual parts being pulled apart and FIG. 2 the same in perspective.

The FIG. 1, a strip electrode 12, a tape electrode 13 and an intermediate separator band 4 with ribs or connectors are provided. The band electrodes 12, 13 and the separator band 4 are zigzagically folded into packets and are packaged laterally laterally into the cells of a block box. The folding edges 6 of the electrode packages are perpendicular to the abutment surface of the accumulator, so that gas bubbles can rise freely between the electrodes 12, 13.

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According to the invention, both the outer leads and the interconnections between the cells are established via large flat, overlying partitions 7 or outer walls 8 of the block box, areas 9 of the electrode support skeleton 2,3 by a tape electrode. IN

FIG. 1, the outer leads 16 and 17 of the electrode support skeleton 2 are formed by the band electrode 12, the connection between the cells is provided by means of the electrode support skeleton 3 of the band electrode 13.

The individual tape electrode can also be wound at the end over a lead pin and connected to it, for example by pressure welding.

The model electrode and the separator band are interrupted in the transition regions between the cells.

For the manufacture of a zigzag-folded electrode package for a multi-cell accumulator, it is preferable to use electrode skeletons wound as endless bands on rollers 10, 35, 4 and which may be in the form of lattice skeletons of lead or rolled metal, the individual tape electrode, if any, has a continuous connector at the rim. In these lattice skeletons a uniform mass is pasted as active material.

5 This is advantageous since the finished tape electrodes during the battery operation alternate in polarity from cell to cell. Thus, the electrode support skeletons 2, 3 pass into the band electrodes 12, 13.

During the insertion of a highly porous separator band which is quite insensitive to pressure and wound from a roller 14, the band electrodes run together via a turning roller 15, after which they can be folded.

Immediately prior to folding, some areas 9 15 are cut out of the tape electrodes 12, 13 and separator 4, which areas, after insertion into the block box, would otherwise extend over one of the partitions 7 or 8 and be left over, except for the electrode support skeleton needed for the transition over a partition.

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To complete the accumulator, it is now only necessary to close the block case, which can be done by a mirror weld at which a sidewall 18 is welded, the sidewall being perpendicular to the plane of the electrodes. Through the heat effect, the resin penetrates both the partition wall 7 and the outer wall 8 of the block box as well as the corresponding extensions 19 and 20 respectively into the side wall 18 through the skeleton of the electrode, so that a solid and liquid-tight connection is obtained. Prior to welding a lid, the electrode support skeleton may be pressed against the partition by means of a plunger 30 and further heating may be provided to obtain some penetration of the electrode support skeleton at the edge of the partition 7 prior to final welding of the lid.

3g Fill and vent openings can then be provided on the upper side of the block box.

Parallel to the imaging plane is also the plane of the electrolyte mirror, while the closing plane indicated by the groove A-A is perpendicular to the electrolyte mirror.

Claims (9)

The necessary end pole connections can be provided inside or outside the cell via protruding electrode parts, for example by welding an end pole. 1. Multi-cell lead accumulator with electrode blocks in the form of zigzag-like for a package folded positive and negative band electrodes (12, 13) with intermediate separators (4), 2 o, characterized in that adjacent accumulator cells are electrically connected via a large surface, through the cell wall (7) guided the support skeleton (3) for one of the tape electrodes (12, 13) and the cover of the block box is formed by a side wall (18) perpendicular to the plane of the electrodes. 25 Lead accumulator according to claim 1, characterized in that the support skeleton (2, 3) is made of endless ribbons of rolled metal. Lead accumulator according to claims 1 and 2, characterized in that the bands of the electrode blocks are connected to pin shaped lead rods, e.g. by wrapping and pressure welding, and that these pins form the basis for the pin holes. Lead accumulator according to claims 1 and 2, characterized in that the outer electrical connections (16, 17) are formed by the large surface, which passes through the outer wall (8) of the block box (1) the electrode skeleton (2 or 3) or one of the tape electrodes. (12 and 13, respectively). 150869 A method of producing a multi-cell lead accumulator, in which the electrode blocks consisting of positive and negative band electrodes and intermediate separators (4) are folded into a zigzag-shaped package and inserted into the block box, characterized in that the large-scale electrode carrier framework which passed through the partition or outer wall of the block box, is provided with correspondingly divided areas free of active mass, that the corresponding parallel sections of the model electrode are completely removed, and that the side openings 10 are then closed tightly by welding a side wall (18). It is obvious that the usual processing processes, such as storage, wrapping, preservation (such as boric acid treatment) can be carried out outside the block box. However, for the continuity of the manufacturing process, it is advantageous if the treatments after insertion of the electrode package into the block box are carried out therein. The advantage of the described accumulator is that its manufacturing process enables a more appropriate flow of material. Claims. 15 --------------------- Method according to claim 5, characterized in that the closure is effected by a mirror welding and that one tape electrode is inserted slightly into the partition or outer wall by a pressure effect before welding the electrode support skeleton without welding. Method according to claim 6, characterized in that the area of the electrode support skeleton to be introduced is heated before the pressure effect. 20 Method according to claims 5-7, characterized in that the electrode support skeleton (2, 3) is glued together with a uniformly active mass. Method according to claims 5-8, characterized in that the band electrodes in the block box are subjected to a propagation treatment, after which the block box is closed from the side.