| 摘要 |
PURPOSE: A mandrel for winding the electrode assembly for a secondary battery is provided, to minimize the final thickness of a wound electrode assembly by employing a plate-shaped body and to enable the wound electrode assembly to be separated from the mandrel by controlling the interval between reel members by a control means using an electromagnet. CONSTITUTION: The mandrel(20) comprises a plate-shaped body(21) which contains insertion grooves on the both faces; reel members(25, 26) which are installed in the each insertion grooves to allow them to go and come; and control means which are installed in the reel members and control the interval between the reel members. Preferably the width of the reel members is equal to the thickness of the body. The reel member comprises a winding part which is arranged to correspond to the side face of the body and winds the electrode assembly; and a moving part which is extended from the plate part of the winding part, is inserted into the insertion groove of the body and is electrically conductive. |
