Electrical connection device for an output terminal of a storage battery
A sealed storage battery including a container containing an electrochemical stack having alternating positive and negative electrodes on either side of separators impregnated with electrolyte; a current output terminal passing through a wall of the container; and a connector electrically connecting the electrodes of one polarity to the terminal passing through a wall of the container. The connector includes a flat connection welded to the electrodes and an elastic connection fitted without welding to the terminal passing through a wall of the container.
1. A sealed storage battery comprising:
a container containing an electrochemical stack comprising alternating positive and negative electrodes on either side of separators impregnated with electrolyte;
a current output terminal passing through a wall of the container;
a connector electrically connecting the electrodes of one polarity to the terminal passing through a wall of the container,
said connector comprising a flat connection welded to said electrodes and an elastic connection fitted without welding to said terminal passing through a wall of the container.
2. The storage battery according to claim 1 , in which the elastic connection comprises a crown containing a flexible ring encircling the terminal passing through a wall of the container.
3. The storage battery according to claim 2 , in which the flexible ring is of a one-piece construction with the crown.
4. The storage battery according to claim 1 , in which the elastic connection comprises a corrugated plate penetrating into a recess of the terminal passing through a wall of the container.
5. The storage battery according to claim 4 , in which the corrugated plate is constituted by a shaped portion of said flat connection.
6. The storage battery according to claim 1 , in which each electrode comprises a metal current collector, the collectors being folded in a direction substantially perpendicular to their initial direction over a height at least equal to the distance separating them from adjoining collectors of the same polarity so as to form a substantially planar and continuous baseplate on which the flat connection of the connector is welded.
7. The storage battery according to claim 1 , in which the output terminal passing through a wall of the container is the negative terminal and the connector is of a material selected from the group consisting of a Cu/Ni composite, copper, nickel and stainless steel.
8. The storage battery according to claim 1 , in which the output terminal passing through a wall of the container has an axis of symmetry, the connector being symmetrical with respect to this axis.