DE2463050C2 - Application of a device for the filling of the casing tubes surrounding the lead cores of tube plates of lead accumulators - Google Patents

Description

35

The invention relates to the use of a device for filling the lead cores of tube sheets of lead accumulators at a distance enveloping "o electrolyte-permeable porous, in particular with a film-like layer of pore-closing carboxymethyl cellulose prepared casing pipes, which in itself known way are mechanically temporarily sealed with a jig, by pressing Water in excess amount to reduce the viscosity-containing active composition in the Casing pipes.

From DE-AS 22 43 377 it is known to fill the adjacent lead cores of the pipe so Plates of lead accumulators concentrically enveloping insulating, electrolyte-permeable casing pipes to use paste-like active mass for starter batteries, to which water is added in such an amount, that the dynamic viscosity of the paste is reduced. Because of this known filling method, it is that by increasing the water content of the pasty active material, it is made flowable in such a way that that it can be pressed into the narrow annular slots of the tube plates for accumulators and that continues through The increased water content improves the properties of lead-acid batteries produced in this way.

It is disadvantageous that with the one from the jacket pipes Water paste particles emerging through the pores are carried along with it and become entrained as a result It is also disadvantageous that due to the leakage of water from the pores of the When filling, casing pipes can only be filled with paste up to a certain limited length can, since the paste becomes increasingly viscous as the liquid escapes. The active mass solidifies finally in the jacket pipe before a complete filling is achieved. In such a case, even at If a higher, still acceptable pressure is used, a complete filling cannot be achieved.

It is also from DE-AS 12 81 515 a method and a device for the production of tubular plates For lead accumulators known here is the paste-like active material, which is in the jacket pipes a water-soluble thickener is added, which is available in sufficient quantity must be in order to absorb the water and give the paste a stable plastic consistency. In this fundamentally different filling process, the walls of the tubes are known per se to be temporarily covered mechanically. This mechanical cover is required here because of the use a thickener a very holier extrusion pressure must be applied in the filling, which the temporary mechanical sealing of the tubes

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According to the subject matter of the invention, however, a pasty active material is assumed which contains water in excess amount to reduce the viscosity of the material and consequently must not contain any thickening agent. This results in a the state \ .r technology d different problem, because a device for a filling method which operates with excess water must satisfy other requirements by as by increasing the water content of the paste-like active material it is so rendered flowable that it easily can be pressed into the narrow ring slots between the lead cores and the casing pipes.The increased water content is necessary on the one hand to create the desired lubricating film on the porous casing material, which enables it to be pressed in, on the other hand, due to the leakage of water from the pores of the casing pipes, active material is taken with it when it is filled and gets lost. As a result of the leakage of water, the paste becomes increasingly viscous during the pressing-in process, so that due to this solidification, only limited pipe lengths could be optimally filled up to now. These problems of water loss do not occur in the device of DE-AS 12 81515, since the thickening agent there is intended to prevent water loss from occurring during the pressing.

The invention is based on the object of filling the casing pipes of pipe plates of lead-acid batteries with pasty active mass containing water in excess to reduce the The viscosity of the mass contains material to avoid loss of material due to excessive fluid leakage and the ability to create longer tubes, as is the case with larger tube plates (for example in a length of 2 m) to be filled with such active material, including excessive amounts of liquid The filling process through the casing pipe walls should be prevented and the addition of flow aids to the paste should be superfluous.

According to the invention, the object is achieved through the application of the specific embodiment described at the outset Device solved in that the clamping device is designed so that on the to be filled Jacketed pipes on each side a cover plate made of elastic material is arranged, which in its shape

is or adapts to the contours of the casing pipes, the pores of which are closed. In the battery itself, the CMC dissolves easily in the sulfuric acid, thus exposing the openings again. During charging, the CMC is essentially _{oxidized to CO 2} and does not leave behind any substances harmful to the cells.

Further features of the application according to the invention of the device mentioned at the beginning are shown in FIGS Subclaims claimed

Through the teaching of the invention it is achieved that it is possible to use all casing pipes of the most varied Dimensions, so both very large and very long in a simple manner, with the pastes can be constructed relatively simply, without flow aids. In particular, the invention makes it more advantageous Way prevents material loss. Pipes are obtained which are externally practically free from Pb-containing

Further details of the invention result from the following description of various exemplary embodiments, represent the devices for preparing casing pipes. In the drawing shows

F i g. 1 a number of casing tubes arranged side by side, in which pasty active material is to be pressed in and which are provided with cover plates,

FIG. 2 shows an exemplary embodiment corresponding to FIG. 1, in which, however, the casing pipes are only partially are covered

3 shows an exemplary embodiment corresponding to FIG. 1, in which sealing strips are arranged between the cover plates and the jacket pipes and

F i g. 4 shows a section along line IV-IV of FIG. 3.

The problem described at the beginning of the leakage of liquid from casing pipes during filling in particular long jacket pipes can through the shown in the drawing. Device, all of which are mechanical Means are to prevent. According to the embodiment shown in Fig. 1 of the drawing on side by side arranged porous, electrolyte-permeable casing tubes 1, inside each one Lead core is arranged centrally, before filling with active, paste-like mass cover plates 2 and 3 Made of foam rubber, silicone rubber or the like. Arranged in such a way that the cover plates 2, 3 are largely adapt to the contours of the casing pipes. The cover plates 2, 3 can increase the contact pressure can also be braced against one another by a tightening strap or the like (not shown).

A device corresponding to FIG. 1 is shown in FIG. 1 which is shown as the only difference has longer jacket pipes than the cover, so that only a partial cover by the cover plates 2, 3 is achieved. Is now to fill the jacket pipes, for example with a metering device over into the Pipe ends of pluggable nozzle openings of active material pressed into the casing pipe 1, there is too much leakage Water or paste mixed with water by the cover plates 2,3 successfully avoided and thus prevents the paste from solidifying in the jacket pipes before they are completely filled. It is in any case, i. H. even with the longer tubes of the type shown in Figure 2 of the drawing ensures that a complete filling can be carried out in a metered manner.

In the embodiment shown in FIGS. 3 and 4 of the drawing, cover plates are used 4, 5 used in the same arrangement already described on casing pipes 1, which each end is provided with a transverse, dovetail-shaped recess ti, 7, 8, 9 are. In each dovetail-shaped recess 6, 7, 8, 9 is a conformable, profiled sealing tape inserted which runs transversely to the jacket pipes 1 near the end and is under the pressure of the associated cover plate, slightly deforming, clings to the contours of the casing pipes 1. Through the Use of such sealing lips, sealing strips or sealing tapes 10, 11, 12, 13 made of elastic material the ends of the panels and, if necessary, the sides of the panels and by designing the cover panels accordingly the unwanted water leakage becomes more reliable at '; Pressing the active material into the casing pipes prevented or limited.

1 sheet of drawings

Claims (5)

Patent claims: 1. Application of a device for filling the lead cores from tube plates of lead accumulators at a distance enveloping, electrolyte-permeable porous, in particular with a film-like one Layer of pore-closing carboxymethyl cellulose prepared casing pipes, which in itself known way are mechanically temporarily sealed with a jig, by pressing Active water containing an excess amount to lower the viscosity Mass into the casing pipes, the clamping device being designed so that on the to be filled Casing pipes (1) each have a cover plate (2,3,4,5) made of elastic material on both sides is whose shape is adapted to the contours of the casing tubes (1), closing their pores is or adapts 2. Application according to claim 1, characterized in that that the cover plates (2, 3, 4, 5) are made of Moosgum 3ii or silicone rubber. 3. Application according to claim 1 and 2, characterized characterized in that the cover plates (2,3,4,5) the Only partially cover the casing pipes (1). 4. Application according to one of claims 1 to 3, characterized in that sealing elements (10, 11, 12, 13) between the Abdertplatten (2, 3, 4, 5) and the casing pipes (1) are arranged at the end. 5. Application according to claim 4, characterized in that the sealing elements (10,11, 12,13) in each a transverse recess (6, 7, 8, 9) of the cover panels (2,3,4,5) are arranged.