Preparation method and device of electrode assembly

The invention provides a preparation method and device of an electrode assembly. The preparation method comprises the steps of carrying out surface treatment on an unfolded section of a base film in the process of unwinding the base film so as to obtain a continuously extending diaphragm; introducing the continuously extending diaphragm into an electrode assembly preparation module, and enabling the continuously extending diaphragm to be combined with a first electrode and a second electrode so as to obtain the electrode assembly. According to the invention, the step of replacing a diaphragm reel can be removed in the process of preparing the electrode assembly, so that the preparation efficiency of the electrode assembly is effectively improved, and the preparation cost of the electrode assembly is reduced. 本发明提供一种电极组件的制备方法和装置，制备方法包括：基膜在放卷的过程中，对所述基膜的展开段进行表面处理，以得到连续延伸的隔膜；将所述连续延伸的隔膜引入电极组件制备模块中，并使所述连续延伸的隔膜与第一电极和第二电极组合，以得到所述电极组件。本发明能够在制备电极组件的过程中免除更换隔膜卷的步骤，有效提高了电极组件的制备效率，降低了电极组件的制备成本。