Method and device for forming an electrochemical device

Abstract

The present invention relates to a method (210) and a device (110) for initially charging a lithium-comprising anode (114) in an electrochemical device (112), wherein the electrochemical device (112) comprises an anode (114), a cathode (116), and an electrolyte (122) configured for providing a connection between the cathode (116) and the anode (114). The method (210) comprises the following method steps: a) providing an electrochemical device (112), wherein the anode (114) and the cathode (114) have not been fully charged before; b) supplying a plurality of current pulses (126) to the electrochemical device (112), whereby a solid electrolyte interphase (30) is generated on a surface (132) of the anode (114) and on a surface (133) of the cathode (116) both adjoining the electrolyte (122), wherein the solid electrolyte interphase (130) comprises a corrosion product of the electrolyte (122) and of the anode (114) or the cathode (116), respectively; and c) obtaining the formed electrochemical device (112); d) determining at least one material parameter related to a performance of the electrochemical device (112) during method step b); and e) adjusting at least one pulse parameter related to the current pulses (126) as applied to the electrochemical device (112) during method step b). The method (210) and the device (110) according to the present invention perform the initial charging of the electrochemical device (112) in a comparatively fast manner, while scrap and spread of the electrochemical devices (112) formed in this fashion is diminished. The method (210) and the device (110) are, further, able to perform an in-situ quality control of the electrochemical device (112) during its forming in an easy, direct and reliable manner.

Dependencies are inferred from the claim text.