Patent ID: 9444089
Filing Date: 2016-09-13
CPC Classification: H01M,Y02E,Y02P

Claim Text:
1. A mandrel configured to be used in a winding process for manufacturing a jelly roll type electrode assembly of a cathode/separator/anode structure, the mandrel comprising: a first mandrel part located at one side of a central region of the mandrel, and a second mandrel part located at the other side of the central region of the mandrel, wherein the mandrel has an oval cross section perpendicular to a rotational central axis of the mandrel, wherein the first mandrel part and the second mandrel part each comprise a main body part and an exchange part, detachably mounted to the main body part, having an end of a major axis of the mandrel, and wherein an interface between each main body part and exchange part comprises a protrusion and a fastening groove, by which coupling force between the main body part and the exchange part is improved.