US 5,397,659 A · Electrochemical storage device

Abstract

An electrochemical storage device and a process for making the same has electrode plates of differing polarity which are stacked one upon the other. Each one of the electrode plates exhibits a metallized electrode structure and a current tapping vane which is resistant to bending and which is electrically conductively secured to a welding margin of the electrode structure. The same-polarity current tapping vanes of the electrode plates are electrically connected to a connecting strap extending parallel to the electrode plate stack and within the storage device housing. In order that, inter alia, the service life of the electrochemical storage device should be increased, the current tapping vanes disposed at the electrode structures are permanently shaped in accordance with their installation position essentially only outside the welding margin, in such a manner that in the installed condition they are free from mechanical stresses in the region of the welding margin onto the electrode structure.

Claims17

Dependent claims

Electrochemical storage device comprising:

electrode plates of differing polarity stacked one upon the other to form an electrode plate stack, wherein each electrode plate is a metallized electrode structure having a welding margin, and includes a current tapping vane that is resistant to bending and is electrically conductively connected to the welding margin of the electrode structure;
a storage device housing that houses the electrodes plates, with individual same-polarity current tapping vanes of the electrode plates electrically connected within the storage device housing to one of the connecting straps,
wherein the current tapping vanes disposed at the electrode structures are permanently shaped in accordance with an installation position essentially only outside the welding margin such that the current tapping vanes are free from mechanical stresses at the welding margin when the current tapping vanes are in said installation position.

Process for the manufacture of an electrochemical storage device, comprising:

providing metallized electrode structures and planar current tapping vanes;
forming electrode plates from the electrode structures and the current tapping vanes by welding individual current tapping vanes onto a welding margin of the electrode structures;
filling the electrode structures with active mass;
stacking the electrode plates one upon another;
intercalating further plate-shaped components between the electrode plates to form an electrode plate stack;
connecting same-polarity current tapping vanes to a connecting strap such that the current tapping vanes are electrically conductively connected to the connecting strap, and
permanently shaping the initially planar current tapping vanes, prior to the stacking of the electrode plates, outside the welding margin occupied in common by the electrode structures and the current tapping vanes in accordance with a subsequent installation position of the current tapping vanes such that the welding margin in an installed condition of the electrode plates is free from mechanical stresses.

4 more elements

Dependencies are inferred from the claim text.

Electrochemical storage device

Life of this patent

Electrochemical storage device

Life of this patent

Abstract

Claims17