DE1036346B - Electric lead accumulator - Google Patents

Description

The presently described invention relates to a further embodiment of the lead accumulator according to patent application A 23625 IVa / 21b. In the said Patent application consist in a known manner, the end plates of the plate set from positive Electrodes. Opposite these end plates are additional electrodes, their shape and size substantially correspond to those of the end plates and those with the negative plates are electrically conductive are connected. According to the invention, a particular technical advance is achieved in that the Additional electrodes are formed by the metallic wall of the cell vessel itself, with the metallic cell vessel is electrically conductively connected to the negative plates. This will be at the same time achieved a substantial increase in the surface area of the additional electrode, which reduces the Current density also leads to the additional electrode. In this way, z. B. the overvoltage of hydrogen at the additional electrode brought up to the overvoltage on the negative plates and a cheaper one Power distribution achieved.

Likewise, the overvoltage at the additional electrodes can advantageously be used for better current distribution the overvoltage on the negative plates chemically, physically and constructively in the following way:

1. by chemical means

a) by alloying the additional electrode, e.g. B. with antimony or copper, so with elements that reduce the overvoltage,

b) by covering the auxiliary electrodes with elements that reduce the overvoltage, z. B. by silver plating, copper plating,

c) by additives to the electrolyte, e.g. B. Cu SO ₄ , Na SO ₄ , Zn SO ₄ or phosphoric acid;

2. by physical means by roughening the surface of the auxiliary electrode;

3. in a constructive way through special profiling and shape of the electrodes.

In the drawing, an exemplary embodiment for the introduction of the overvoltage is in section Hydrogen on the additional electrodes to the overvoltage on the negative electrodes on constructive Paths shown.

The vessel wall 1 forms the additional electrodes opposite the positive end electrodes 2. As a result, the vessel wall with the negative electrodes 3 is electrical tied together. To reduce the overvoltage, the vessel wall has a positive effect on it End plates a profiling 4.

Electric lead accumulator

Addition to patent application A23625IVa / 21b
(Interpretation document 1 028 643)

Applicant:

Accumulatoren-Fabrik Aktiengesellschaft, Hagen (Westphalia), Dieckstr. 42

Herbext Haebler, Frankfurt / M.-Praunheim,
has been named as the inventor

Due to the presently described invention, the special additional electrode is saved, whereby advantages are also achieved in terms of material expenditure and space requirements. Instead of a metallic cell vessel can also be one made of an electrochemically inert material, e.g. B. off an electrically conductive plastic with an addition of graphite or carbon.

Claims (3)

Patent claims: 1.Electric lead accumulator according to patent application A23740IVa / 21b with additional electrodes, which have practically no capacity, characterized in that instead of the opposite the positive end plates arranged additional electrodes the metallic walls of the Cell vessel without any conditions serve as additional electrodes. 2. Electrical accumulator according to claim 1, characterized in that the cell vessel from a conductive, electrochemically inert material, e.g. B. from a by adding graphite or carbon is made electrically conductive plastic. 3. Electrical accumulator according to claims 1 and 2, characterized in that the overvoltage of the hydrogen at the additional electrodes to the overvoltage on the negative electrode plates on chemical, physical and / or is introduced constructively.