DE1015880B - Permanently tightly sealed alkaline accumulator - Google Patents

Description

GERMAN

Permanently tightly sealed alkaline accumulator

The invention relates to a permanently sealed alkaline storage battery with devices in order to use up the gases created inside it during the charge.

Known accumulators of this type have electrodes, in which the active material is housed in a metal container and for gas consumption is used. The latter applies in particular to the negative electrode, which again consumes the oxygen, generated by the positive electrode during charging.

In order to improve the gas consumption, it has also been proposed to use metal surfaces with of the negative electrode are in connection or constitute components of the negative electrode for which

Include gas consumption. This is what it is

are sintered electrodes with a sintered nickel framework.

The disadvantage of these electrodes is that they serve the oxygen in their space. In particular is relatively high price, due to the fact that in this regard the addition of the aforementioned Liehe manufacturing process is conditional. Nickel powder beneficial.

The invention is based on the task of providing a Another advantage is to be seen in the fact that

knew negative electrodes in a constantly tight press electrode basically easily also a completely closed one replacing alkaline batteries can be given a more graceful shape without the by pressing electrodes known per se, which makes the manufacturing process more expensive. Electrodes are to be designed so that they are suitable for the A suitable design of the described

Applicant:

Accumulatoren-Fabrik Aktiengesellschaft, Hagen (Westphalia)

Dr. rer. nat. Freimut Peters, Hagen (Westphalia), has been named as the inventor

Consumption of oxygen have particularly favorable properties.

The importance of this task can be seen in the fact that press electrodes are particularly simple and can be produced economically, so that their use in gas-tight accumulators is desirable, at the same time, however, the problem of gas consumption must be solved.

The object described above is achieved by the following combination according to the invention given, which consists in that the accumulator porous electrodes, porous separators and has a capillary fixed electrolyte and that it consumes oxygen at the negative electrode possesses metals while avoiding the development of hydrogen during the charge, which are in contact with the gas space and that for this purpose the cadmium mass as press electrodes formed negative electrodes is mixed with copper, nickel or iron-containing metal powder.

The advantage of this arrangement is to be seen in the fact that the admixture of the above Metal powder on the one hand the compressibility of the starting materials is improved and that on the other hand these metal powders, especially insofar as they are on the surface of the electrodes, through their contact with the gas in the gas space of the accumulator in a particularly good way of consuming the gas according to the invention Accumulator is that the amount of mixed metal powder up to Weight percent of the cadmium mass is.

Claims (2)

Claims ·. 1. Permanently tightly sealed alkaline accumulator, characterized by the combination, that it has porous electrodes, porous separators and a capillary fixed electrolyte and that it is used for oxygen consumption at the negative electrode while avoiding a Development of hydrogen when the charge possesses metals that come into contact with the gas space stand, and that this is the cadmium mass of the negative formed as press electrodes Electrodes copper, nickel or iron-containing metal powder is added. 2. Accumulator according to claim 1, characterized in that the amount of admixed Metal powder is up to 150% of the cadmium mass. Documents considered: Swiss Patent No. 270 356; French Patent Nos. 919 589, 999 863, 836, 1004176;
Belgian patent specification No. 498 790.