公开(公告)号：US10217988B2

公开(公告)日：2019-02-26

申请号：US15543597

申请日：2016-01-26

申请人： NEC ENERGY DEVICES, LTD.

发明人： Kouzou Takeda ,  Masaaki Matsuu ,  Hiroo Takahashi ,  Yoshimasa Yamamoto ,  Masanori Hirai

IPC分类号： H01M4/02 ,  H01M2/34 ,  H01M4/13 ,  H01M10/04 ,  H01M10/0585

摘要： Provided is a secondary battery with a high electric characteristic and reliability that prevents the short circuit between a positive electrode and a negative electrode by an insulating member and that prevents or reduces the volume increase and deformation of a battery electrode assembly. A secondary battery includes a battery electrode assembly in which positive electrode 1 and negative electrode 6 are alternately laminated while separator 20 is interposed therebetween. Positive electrode 1 and negative electrode 6 include current collectors 3, 8 and active materials 2, 7, each surface of current collectors 3, 8 is provided with an application portion and a non-application portion of active materials 2, 8, and the active materials 2, 7 include a thin portion whose thickness is small. A charging capacity ratio A/C between negative electrode 6 and positive electrode 1 that face each other at an outer edge portion containing the thin portion is greater than the charging capacity ratio A/C between negative electrode 6 and positive electrode 1 that face each other at a center side with respect to the outer edge portion.

公开(公告)号：US09570776B2

公开(公告)日：2017-02-14

申请号：US14430244

申请日：2013-09-26

申请人： NEC ENERGY DEVICES, LTD.

发明人： Yoshimasa Yamamoto

IPC分类号： H01M2/22 ,  H01M10/0525 ,  H01M10/0585 ,  H01M2/26 ,  H01M4/04 ,  H01M2/16 ,  H01M2/30 ,  H01M4/1391 ,  H01M4/70

CPC分类号： H01M2/266 ,  H01M2/162 ,  H01M2/1653 ,  H01M2/1673 ,  H01M2/30 ,  H01M2/305 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/525 ,  H01M4/587 ,  H01M4/623 ,  H01M4/625 ,  H01M4/661 ,  H01M4/70 ,  H01M10/0525 ,  H01M10/0585 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011 ,  Y10T29/49108

摘要： Provided is a battery in which collector foil is unlikely to break.In a lithium-ion secondary battery, as for a distance from a connection section between a positive electrode tab and the positive electrode terminal to a boundary section between applying and non-applying sections of positive-electrode active material in a direction perpendicular to a stacking direction, compared with a reference positive electrode having the boundary section that is located farthest to the connection section by straight-line distance, a layer of a positive electrode that is stacked in such a way as to be farthest from the reference positive electrode has a smaller distance from a boundary of the applying and non-applying sections of the positive-electrode active material to a connection section with the positive electrode tab in a direction perpendicular to a stacking direction.

摘要翻译： 在锂离子二次电池中，与正电极接线片和正极端子之间的连接部分与正电极活性材料的施加和非施加部分之间的边界部分在垂直于堆叠的方向 方向，与具有通过直线距离距离连接部分最远的边界部分的参考正电极相比，以与离基准正电极最远的方式层叠的正极层具有 从正极活性物质的施加和非施加部分的边界到与正极片的连接部分在垂直于层叠方向的方向上的距离较小。

公开(公告)号：US10153477B2

公开(公告)日：2018-12-11

申请号：US15389796

申请日：2016-12-23

申请人： NEC ENERGY DEVICES, LTD.

发明人： Yoshimasa Yamamoto

IPC分类号： H01M2/22 ,  H01M2/26 ,  H01M10/0585 ,  H01M4/04 ,  H01M10/0525 ,  H01M2/16 ,  H01M2/30 ,  H01M4/131 ,  H01M4/133 ,  H01M4/525 ,  H01M4/587 ,  H01M4/62 ,  H01M4/66 ,  H01M4/1391 ,  H01M4/70 ,  H01M4/1393 ,  H01M4/02

摘要： Provided is a battery in which collector foil is unlikely to break.In a lithium-ion secondary battery, as for a distance from a connection section between a positive electrode tab and the positive electrode terminal to a boundary section between applying and non-applying sections of positive-electrode active material in a direction perpendicular to a stacking direction, compared with a reference positive electrode having the boundary section that is located farthest to the connection section by straight-line distance, a layer of a positive electrode that is stacked in such a way as to be farthest from the reference positive electrode has a smaller distance from a boundary of the applying and non-applying sections of the positive-electrode active material to a connection section with the positive electrode tab in a direction perpendicular to a stacking direction.

公开(公告)号：US20150288026A1

公开(公告)日：2015-10-08

申请号：US14430244

申请日：2013-09-26

申请人： NEC ENERGY DEVICES, LTD.

发明人： Yoshimasa Yamamoto

IPC分类号： H01M10/0525 ,  H01M2/26 ,  H01M10/0585 ,  H01M4/04 ,  H01M2/16 ,  H01M2/30

CPC分类号： H01M2/266 ,  H01M2/162 ,  H01M2/1653 ,  H01M2/1673 ,  H01M2/30 ,  H01M2/305 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/525 ,  H01M4/587 ,  H01M4/623 ,  H01M4/625 ,  H01M4/661 ,  H01M4/70 ,  H01M10/0525 ,  H01M10/0585 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011 ,  Y10T29/49108

摘要： Provided is a battery in which collector foil is unlikely to break.In a lithium-ion secondary battery, as for a distance from a connection section between a positive electrode tab and the positive electrode terminal to a boundary section between applying and non-applying sections of positive-electrode active material in a direction perpendicular to a stacking direction, compared with a reference positive electrode having the boundary section that is located closest to the connection section by straight-line distance, a layer of a positive electrode that is stacked in such a way as to be farthest from the reference positive electrode has a smaller distance from a boundary of the applying and non-applying sections of the positive-electrode active material to a connection section with the positive electrode tab in a direction perpendicular to a stacking direction.

摘要翻译： 提供了一种电池，其中集电箔不太可能破裂。 在锂离子二次电池中，与正电极接线片和正极端子之间的连接部分与正电极活性材料的施加和非施加部分之间的边界部分在垂直于堆叠的方向 方向，与具有通过直线距离最靠近连接部分的边界部分的参考正电极相比，以与离基准正电极最远的方式堆叠的正电极层具有 从正极活性物质的施加和非施加部分的边界到与正极片的连接部分在垂直于层叠方向的方向上的距离较小。