The invention relates to a device and a method for joining webs of material for the production of energy cells, wherein a running-out web of material can be joined to a new web of material. The running-out web of material and the new web of material are gu...

An electrode connection cause determination system includes a position measuring instrument. The position measuring instrument is configured to, when an electrode moves between an unwinder and a rewinder in a roll-to-roll state, acquire coordinate value da...