Semi-automatic method for manufacturing an electrochemical Li-ion battery

摘要

A semi-automatic method for making a Li-ion electrochemical accumulator according to which a continuous electrolytic separator strip is automatically wound on two-sided electrodes manually and alternately stacked according to their polarity. By the method, it is not necessary to assemble or manually cut out each electrolytic separator inserted between two adjacent electrodes in the stack and of opposite polarity.

主权项

1. A method for making a lithium-ion electrochemical accumulator, comprising:
a) making a plurality of two-sided electrodes, each comprising an electrically conducting substrate forming a current collector supporting on its two opposite faces an electrode material of same given polarity; the polarity of electrodes being divided into two groups, one of the groups comprising electrodes with polarity opposite to those of the other group; b) making two one-sided electrodes, each comprising an electrically conducting substrate forming a current collector supporting on a single one of its faces an electrode material of given polarity, both one-sided electrodes supporting a single electrode material of the same polarity; c) unwinding an electrolytic separator in a form of a continuous strip from a winder to position the electrolytic separator on one edge of a mandrel with two parallel edges; d) manually positioning a first two-sided electrode of one of the groups on the edge of the mandrel parallel to the one on which the continuous separator strip is already positioned; e) rotating the mandrel to wrap the first two-sided electrode of the group and the mandrel with the continuous separator strip; f) manually positioning a first two-sided electrode of the other group on the edge of the mandrel on which the continuous separator strip is positioned; g) rotating the mandrel in the same direction as the one of d) to also wrap the first two-sided electrode of the other group with the continuous separator strip; h) repeating d) to g) with all the other electrodes made according to a) and b) to have the other electrodes stacked on the mandrel with each of the one-sided electrodes laid out at one of the ends of the stack, all the electrodes being wrapped by the continuous separator strip, the separator strip also separating two adjacent electrodes and of opposite polarity relatively to each other.