公开(公告)号：US20170279156A1

公开(公告)日：2017-09-28

申请号：US15082743

申请日：2016-03-28

申请人： Bosch Battery Systems, LLC ,  Robert Bosch GmbH

发明人： Mehul Botadra ,  Eugene Levin ,  Mark Kotik ,  Paul Frick

IPC分类号： H01M10/0587 ,  H01M10/0525 ,  H01M10/04

CPC分类号： H01M10/0587 ,  H01M10/0409 ,  H01M10/0431 ,  H01M10/049 ,  H01M10/052 ,  H01M10/0525 ,  H01M2220/20 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

摘要： An electrochemical cell includes a cell housing and an electrode assembly disposed in the cell housing. The electrode assembly includes an electrode pair that is arranged to form a winding having a polygonal spiral wound shape in which a radius of the corner portions of each turn of the winding is constant, regardless of the number of turns. In addition, a length of the linear portions of one turn of the winding is different than a length of the linear portions of another turn of the winding. Since each turn of the winding includes the corner portions having a desired radius, the volumetric efficiency of the electrode assembly including the winding within a cell housing is improved relative to some cells that use conventional windings. An apparatus and method of forming a polygonal spiral wound winding are disclosed.