Abstract: Provided are a battery cell, a battery, an electrical device, and a manufacturing method and device for a battery cell, which belong to the field of battery technologies. The battery cell includes a case, an electrode assembly, an end cover, and a current collecting member. The case has an opening. The electrode assembly is accommodated in the case. The end cover covers the opening and is sealed and connected to the case. The current collecting member is accommodated in the case and located at a side of the electrode assembly facing the end cover. The current collecting member is configured to connect the case and the electrode assembly to electrically connect the electrode assembly to the case. The battery cell with such structure realizes an electrical connection between the electrode assembly and the case through the current collecting member. During assembling of the battery cell.

Abstract: The present invention provides a coated steel plate suitable for an inline thin-film photovoltaic module, comprising a steel substrate and a composite insulating layer on the surface of the steel substrate. The composite insulating layer comprises an insulating base layer and a laser scribing buffer layer; one side of the insulating base layer is the steel substrate, and the other side is the laser scribing buffer layer. The laser scribing buffer layer contains at least one of the following components: SixNy, where 0.75?x:y?1; and Si1-x?(R)x?Oy?, where R is an element selected from Sb, Au, Cu, Sn, and Ag, and 0<x??0.05, 1.9?y??2.