DE454464C - Galvanic element - Google Patents

Description

Galvanic element. The invention relates to a galvanic element with negative electrode forming chambers made of multi-bent sheet zinc or a number of zinc plates standing next to each other. Such elements are known in which the electrode is covered with a permeable absorbent and electrically insulating Coating is covered and where in the chambers the carbon electrodes and the depolarizer are included, with the element as a whole being subjected to strong pressure. The essence of the present invention is that the carbon electrodes and the depolarizer are placed in bags of permeable fabric that are placed in front of the Pressing are used in the chambers, whereupon the whole thing in a compressed state in a pressure-resistant cover, which, depending on the intended use, for the electrolyte, is permeable or as an impermeable cover the container for forms the electrolyte.

These bags are from the point of view of the rational manufacture of great advantage. Because this divides the individual work operations, in such a way as to prepare the bags independently of the other working operations and fill it up so that it can be used at the given moment.

The invention is shown in the drawing in eight figures.

Fig.r shows an element with liquid electrolyte in longitudinal section, Fig. 2 a drying element in longitudinal section. Fig. 3 and q. show graphically and in cross section a drying element with a single chamber.

Figs. 5 and 6 show the parts forming the element before compression, Fig. 7 after compression.

Fig. 8 shows a sachet in perspective. The element according to the invention consists of a zinc sheet a, which forms the negative electrode and is covered with a permeable, electrically insulating envelope b, for example made of filter paper, blotting paper, Linen o. D, 1., Is provided. The zinc sheet is expediently coated beforehand with an adhesive coated, which consists of a mixture of a liquid used as an electrolyte, like a solution of chlorohydrate ammonia and flour, consists, or it becomes between the zinc sheet and its permeable envelope b a sheet of filter paper or linen laid, which is impregnated with the above-mentioned adhesive.

This zinc sheet a with its envelope b is now, as Fig. 5 and 6 show, folded so that a series of chambers are formed.

A sachet c is inserted into each of these chambers and removed again Filter paper, linen or the like containing the depolarizer; now is in everyone Depolarizer introduced a wooden pin, which was later replaced by the carbon pin will.

This whole thing is now placed in a press and a strong pressure for example from 2o to 3o kg per square meter.

The block obtained in this way (Fig.7) is now placed in a sack / , especially in the case where it is to be used to build an element with liquid electrolyte according to Fig. I.

Now replace the wooden pins e with the carbon pins g, one of them slightly larger in diameter so that they enter the depolarizer with a certain amount of liraft can be introduced.

Then the sack is tied around the carbon pins, as shown in Fig. i shows, and the carbon pins g are then conductively connected to one another at the top.

The block thus obtained is then placed in a vessel h which contains the electrolyte i .

In the case of a drying element (Fig. A), after its compression, the block is placed in a sack or an impermeable cover j and pressed into a box k; of course, it can also be brought directly into this box, which must then be correspondingly impermeable. Now the wooden pegs e are replaced by the carbon pegs g and the electrolyte is poured in until the absorbent parts are saturated (permeable envelope b containing the zinc plate a, sachet c with the depolarizer d), and finally the vessel above is in the known manner with Pour wax, pitch or a similar substance L.

The number of chambers formed by the negative electrode can for all element types depending on the area of application and the required capacity of the element. In the case of elements of small dimensions, the zinc sheet can be bent in this way be that there is only one chamber (Fig. 3 and a), in which a sack with the Depolarisatord and a carbon stick g is housed. This arrangement is suitable particularly suitable for very narrow drying elements. For elements with copper oxide as Depolarizer and potash as electrolyte can make the permeable envelope b and the sachet c are made of asbestos and the positive electrode pins are made of copper. The positive one The electrode can also be designed in the form of a plate or similar instead of pin-shaped.

Claims (1)

PATRNT CLAIM: Galvanic element with negative chambers forming Electrode made of multiple bent sheet zinc or a number of adjacent ones Zinc plates covered with a permeable absorbent and electrically insulating Coating is covered, which in the chambers the carbon electrodes and the depolarizer contains and is subjected as a whole to a strong pressure, characterized in that that the carbon electrodes and the depolarizer in bags made of permeable material are arranged, which are inserted into the chambers before pressing, whereupon the whole thing in a compressed state is inserted into a pressure-resistant casing that, Depending on the intended use for the electrolyte, is permeable or as impermeable Shell forms the container for the electrolyte.