Cable-type secondary battery and method for manufacturing the same

摘要

A cable-type secondary battery includes an electrode assembly, which has a first polarity current collector having a long and thin shape, at least two first polarity electrode active material layers formed on the first polarity current collector to be spaced apart in the longitudinal direction, an electrolyte layer filled to surround at least two first polarity electrode active material layers, at least two second polarity electrode active material layers formed on the electrolyte layer to be spaced apart at positions corresponding to the first polarity electrode active material layers, the electrode assembly being continuously bent into a serpentine configuration by a space between the first polarity electrode active material layers; a second polarity current collector configured to surround at least one side of the electrode assembly bent into a serpentine configuration; and a cover member configured to surround the second polarity current collector and the electrode assembly.

主权项

1. A cable-type secondary battery comprising:
an electrode assembly comprising
a first polarity current collector,at least two first polarity electrode active material layers formed on an outer surface of the first polarity current collector and spaced apart from each other at a predetermined interval in a longitudinal direction of the first polarity current collector, each of the at least two first polarity electrode active material layers being located in a respective active region of the electrode assembly,an electrolyte layer filled to surround at least two first polarity electrode active material layers, andat least two second polarity electrode active material layers formed on an outer surface of the electrolyte layer and spaced apart from each other at a predetermined interval in the longitudinal direction, each of the at least two second polarity electrode active material layers being located in a respective one of the active regions of the electrode assembly at positions corresponding to the first polarity electrode active material layers,the electrode assembly being bent at one or more locations between the active regions of the electrode assembly such that the electrode assembly has a serpentine configuration; a second polarity current collector configured to surround at least one side of the electrode assembly which is bent into the serpentine configuration; and a cover member configured to surround the second polarity current collector and the electrode assembly in the serpentine configuration, the serpentine configuration of the electrode assembly being such that the active regions of the electrode assembly containing the first and second polarity active material layers are spaced apart from and not in contact with one another within the cover member.