Patent ID: 9640833
Date: 2017-05-02
CPC Classifications: H01M,Y02E,Y02P

Claim:
1. Lithium secondary cell array in a cylindrical design, comprising a winding mandrel and a winding packet, which contains foil-like coated strips and conductive strips that form the electric cell structure of anode and cathode and separated by a separator, and with outer electrical connecting means comprising pole caps, characterised in that the winding mandrel comprises an insulating material and has a through-channel extending in the longitudinal direction, the winding mandrel is connected to an inner pole cap at each end, the inner pole caps likewise have a through-channel, furthermore respective outer pole caps, each outer pole cap has a through-passage which surrounds and contacts the winding packet circumferentially at least in the edge region, whereby several radially arranged force-fit connections, each acting between the outer and inner pole cap, fix the winding packet and achieve the electrical contacting between the conductive strips and the outer pole cap, whereby the winding packet consists of a copper and an aluminium foil strip, whereby the foil strips are provided with a layer of lithium and conductive particles leaving an edge area free in the longitudinal direction, whereby breaches or holes are provided in the free edge area, each of the breaches or holes being separated by a gap, wherein the gaps increase from the inside to the outside of the winding packet so that the breaches or holes lie above each other in the wound state of the respective strip, in addition, non-woven layers are inserted between the foil strips to carry the electrolyte and conductive insert strips are formed as conductive strips that are located in the free edge area within the winding, whereby the insert strips also have breaches or holes whose position is congruent to the breaches or holes in the foil strips.