RU1595294C - Electrode of chemical current sources - Google Patents

Abstract

The invention relates to electrical engineering and relates to alkaline batteries. The purpose of the invention is to increase strength. The electrode consists of a porous metal plate with a sealed edge filled with active mass. The edge of the electrode is made of plate metal, the height of the edge is equal to the thickness of the electrode, and the porosity is 0.05. - 10% porosity of the plate. 2 ill., 1 tab.

Description

The invention relates to electrical engineering and can be used in the manufacture of electrodes of a chemical current source, for example an alkaline battery.

An object of the invention is to increase strength.

Fia FIG. 1 shows the proposed design of the electrode; figure 2 - section aa in fig. 1.

The electrode, consisting of a porous metal plate 1, is filled. the active mass has a sealed edge 2, which has a height h equal to the thickness H of the plate 1, and on the bin L consists of the metal of the plate 1. And has a porosity of 0.05-10% by. ristosti plates. . .

The pressed-in edge 2, consisting of the metal of the plate, has high mechanical strength and reliably pre-pans the electrode plate 1 from

chips not only during the manufacturing process of the electrode itself, but also when assembling the electrodes into the housing of current sources. This prevents the occurrence of crumbs of the electrode mass and the occurrence of short circuits in the current source.

Example. An electrode was made in the form of a Plate having a disk shape with a diameter of 10.5 mm and a thickness of 1.5 mm. Bypa plate was obtained by cutting from a larger workpiece, which, in turn, was obtained. was pressed by powdering metallic nickel at a pressure of 1 t / cm and sintering the billet in a reducing atmosphere at 620 s. After sintering, the porosity of the billet was equal to 80%. Then made a cut from the workpiece of the electrode plate of the above size. Cutting was carried out using a laser

U1

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Joint venture

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taiovki, beam dyamer 0, t mm, power 150 W. A protective atmosphere of nitrogen was created at the cutting site. . When cutting in this way, the edge of the plate melted, whereby a layer of metal with a porosity of 8% was formed along the edge, which is 10% of the porosity of the electrode blank; 1.5 mm high, equal to the thickness of the plate, and a depth of 0.1 mm, After this, the plate was filled with nickel hydride

It leads to its mechanical weakening and increase in marriage by scrap electro-. dov to 3%. The lower limit of the value of 5 edge porosity - 0.05% is due to the capabilities of the technological process: to obtain porosity less than% indicated. The given value is almost impossible. to The table shows the experimental justification of the actually selected parameters. ;.

With edge height less than thickness

Impregnation of plactins in nitrate solution g odGs m. GBGB actGcG

nickel and by treatment in an alkali solution., 5 is detected due to a decrease in the mechanical process of pressing: sintering of the edges. S in i

and filling the pores with nickel i - hydroxide. in ol

produced in the usual industrial way, which was also used for

twenty

the manufacture of electrodes of conventional design with an edge sealed by crimping in a stamp,

Tests have shown that in the manufacture of the electrode proposed by Konya, the degree of rejection increases with the manufacture of electrodes having design parameters and in accordance with the prototype (see, No. 7). The edge porosity is 75% of the plate porosity, which is equivalent to the edge density of 1.5 - from the density of the plate.

In such a way. proposed coist., -. - "- - - J.. j-f. i -.- "lav v / fxVr

structural defects on chips and scrap electro-25 / electrode ruktsi .. allows to increase

delivery did not exceed 0.4%, while the defect in the manufacture of electrodes with a crimped edge is at least 12.5%. ,.;

Electrical tests of the electrodes showed their good performance during prolonged cycling in a prototype nickel-cadmium battery {type L-0, Vol.

thirty

the capacitive characteristics of the electrodes due to / improve current distribution and eliminate the marriage of electrodes in the scrap and current sources in the short circuit m /

Formula-3 of the sample “Electrode of a chemical source

f- I- ". ---- "" ..vvr. .

As can be seen from the tab. current, consisting of data filled with the active ingredient, electrodes g having a constant mass of porous metal

plates with a sealed edge, characterized in that, in order to increase strength, the volume has a porosity of 0.05 - 10% porosity / plate, and the edge height is equal to the thickness parameters in the claimed conditions: porosity 0, 05-4b% .. poros- (guests of the apastina, ensure the practical absence of defects in the manufacture of electrodes (up to 0.4%). An increase in the porosity of the edge is apparent. 10% at.

not an electrode in the main part.

It leads to its mechanical weakening and an increase in marriage by scrap of electrodes up to 3%. The lower limit of the edge porosity value - 0.05% is due to the capabilities of the technological process: it is practically impossible to obtain porosity of less than% of the indicated value. The table shows the experimental justification of the actual selected parameters. ;.

With edge height less than thickness

 m. GBGB ActGKG ё

perfect edges. S in i

i -. in ol

The degree of rejection increases with the manufacture of electrodes having the design parameters and in accordance with the prototype (see, No. 7). The edge porosity is 75% of the plate porosity, which is equivalent to the edge density of 1.5 - from the density of the plate.

In such a way. proposed coist, -. - "- - - J.. j-f. i -.- "lav v / fxVr

Electrode handles ...

25 / ElectroC.

thirty

the capacitive characteristics of the electrodes due to / improve current distribution and eliminate the marriage of electrodes in the scrap and current sources in the short circuit m /

Formula-3 of the sample “Electrode of a chemical source

f- I- ". ---- "" ..vvr. .

. current consisting of a porous metal filled with active

plates with a sealed edge is characterized by the fact that, in order to increase the strength, the porosity of 0.05 - 10% porosity of the plate is loud, and the edge height is

not an electrode in the main part.

Pore and sost, plates 80%.

FIG. g