DE73518C - Structure of the electrode plates in electrical collectors - Google Patents

Description

IA,

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 21: Electrical apparatus.

The present invention relates to the manufacture of electrode plates primarily for such Batteries, which sudden surges respectively. rough treatment such as on railways. In these, a short circuit is often caused by the inserts made of effective mass of detaching parts inserted in the electrode plates caused, which are at the bottom of the battery by making their way through the conduction channels for the electrolyte in the Electrode plate separating insulation plate have found, deposit, and finally here cause a short circuit by their growth. To remedy this evil, are the conduction channels for the electrolyte on both sides of the insulation plate offset against each other and the recesses provided in the plates opposite the Arranged inserts of the plate and formed larger than this. Which is in the process of decomposition The parts that remove the inserts fall into the recesses in the insulation plate and are deposited here, but the few parts which pass through the conduits to the When they reach the bottom of the cell, they are not stored in a straight line as before, but in a broken zigzag line, which is a union of the detached parts, how this occurred with the present opposing canals excludes. To the bigger one The asbestos fabric enveloping the positive electrode plate is a security against short circuits guided away over the lower, previously free area of the plate.

The attached drawing shows:

Fig. Ι in partial section and view a respectively coated with fabric. protected positive electrode plate, and on each side the same arranged negative electrode plates, which are separated from each other by insulation plates are separated;

Fig. 2 is a section along the line % -% of Fig. 1, in which parts of an electrolytic cell are illustrated, and

FIG. 3 is a section along line 3-3 of FIG. 1.

In the drawing, α is a plate provided with holes α ¹ and approach a ' ² , b are inserts consisting of an effective material such as lead chloride, with or without an admixture of zinc chloride, whose free surfaces are in one plane, arranged in the holes a ^{1 of the same} lie with the plate α. These inserts b are prevented from falling out of the plate by a shoulder b ^1. When the electrode plates are manufactured, a suitable mass of thicker cross-section is cast around the inserts b , whereupon the two are intimately connected to one another by pressing the plate together under high pressure and thereby expanding it. The front surfaces of the plate α are protected by insulation plates c made of celluloid, hard rubber, wood or other material, which are provided with a series of transverse openings c ¹ , the number of which corresponds to the number of inserts b ^l. The longitudinal channels or channels c ² of expediently V-shaped cross-section connect the recesses c ¹ with each other and

Claims (1)

enable the electrolyte to circulate freely. In order not to weaken the insulation plate, the channels c ² are arranged offset from one another on both sides of the same. d is through the inserts b leading holes, in order to grant the electrolyte free access to the inner parts of the inserts, e is an acid-resistant, of asbestos or another material existing tissue, or the like, in which the positive electrode plates are wrapped, wherein the same at the same time the electrode facing side surfaces of the insulation plates covered. The electrode plates described here are prepared for use in electrical collectors in such a way that they are placed as positive plates in an electrolytic cell, the negative electrode of which is made of lead or some other suitable material. The conversion of the inserts b into effective mass is then effected by electrolysis in a known manner. Two rows such negative and positive plates can, as Figure 2 illustrates in the ZeIIe _-. / Of a collector to be set. It should be noted, that the surfaces of the positive electrode plate by the asbestos cloth e covers and the insulation plates c between the positive and negative electrodes in such a way must be arranged, that the holes c ¹ of the same with the inserts of the panels b α match. The insulation plates c separate the electrode plates without disturbing the free access of the electrolyte to the effective mass, so that the electrode plates can be charged and discharged in a suitable manner. On Erdem protect the insulation panels c, the electrode against the effect of the electric current BEZW. against decomposition by the same, and therefore all available current is used for oxidation bezw. chemical action on the effective mass used. The tissue e, which covers the exposed surfaces of the inserts b of the positive electrode plate, gives the surface of the active mass a hold, thereby preventing the disintegration and rapid decomposition thereof and allows the plates to be used advantageously also where they, for example on trains, sudden bumps and rough handling. As can be seen from the drawing, the recesses c ^l in the insulation plate c are larger than the inserts b in the electrode plates a. The main purpose of these is to take up the parts that are detached from the inserts b by the action of the electrolyte, so that they cannot reach the bottom of the cell f . The few anyway c through the channels ^'2 to the bottom of the cell for storing entering parts, c is here by the mutual, at the same time a weakening of the insulation plate c avoided arrangement of the channels ^2' in a broken zigzag line from. A union of these parts by stoppers, as occurs in the opposite channels of the insulation plates used up to now, as well as an accumulation of these in such a way that a short circuit of the electrode plates was formed, is excluded ^{with the mutual arrangement of the channels c 2.} For even greater security against short circuits, the asbestos fabric enveloping the positive electrode plate is guided over the lower surface of the plate facing the bottom of the cell f. Due to the mutual arrangement of the conduits in the insulation plate, at the same time the advantage is achieved that with the same thickness of the insulation plates previously used a larger number of electrode plates can be accommodated in one cell. Pat en τ-An SP ruch: Structure of the electrode plates for electrical collectors to avoid short circuits in such a way that the insulation plates (c ) inserted between the electrodes (a) are provided with recesses (c ^l ) and channels (c ² ) for conducting the electrolyte, which are arranged in such a way that the Parts that are detached from the inserts (b) of the electrodes by the action of the electrolyte are absorbed by the recesses (O ¹ J , while the parts that reach the bottom of the cell (f) through the channels (c ² ) are due to a weakening of the cells Plate (c) avoiding staggered arrangement of the channels (c ² ), are deposited in a broken or zigzag-shaped line, whereby a union of the same and thus a short circuit is avoided and where for greater safety the part facing the bottom of the cell (f) is positive electrode plate is covered with asbestos fabric. For this purpose ι sheet of drawings.