公开(公告)号：US20130157121A1

公开(公告)日：2013-06-20

申请号：US13657282

申请日：2012-10-22

Applicant: Seiko Instruments Inc.

Inventor： Tsuneaki TAMACHI ,  Ryo SATO ,  Shunji WATANABE ,  Maki OKUBO

IPC: H01M2/08

CPC classification number: H01G11/04 ,  H01G11/26 ,  H01G11/34 ,  H01G11/60 ,  H01G11/80 ,  H01G11/82 ,  H01M2/0207 ,  H01M2/026 ,  H01M2/0277 ,  H01M2/0426 ,  H01M2/0469 ,  H01M2/0486 ,  H01M10/0436 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/0585 ,  Y02E60/13

Abstract: A high-quality electrochemical cell is provided that can suppress lowering of charge-discharge efficiency, and that can stably maintain the charge-discharge cycle characteristics over extended time periods. The electrochemical cell includes: a sealing container that includes a base member, and a lid member welded to the base member via a weld layer, the base member and the lid member sealing and defining a storage space in between: and a chargeable and dischargeable electrochemical element housed in the storage space and that includes a positive electrode, a negative electrode, and a separation member impregnated with a nonaqueous electrolytic solution the positive electrode is electrically connected to the base member. The negative electrode is electrically connected to the lid member by being overlaid on the positive electrode via the separation member, and allows cations and/or anions to move between the positive electrode and the negative electrode through the nonaqueous electrolytic solution. The lid member is formed of a metallic material that contains nickel. The negative elect ode has a greater capacitance than the positive electrode,

Abstract translation: 提供了能够抑制充放电效率的降低的高质量的电化学电池，能够在延长的时间内稳定地保持充放电循环特性。 所述电化学电池包括：密封容器，其包括基底构件，以及通过焊接层焊接到所述基底构件上的盖构件，所述基底构件和所述盖构件密封并限定两者之间的储存空间：和可充电和可放电的电化学 容纳在存储空间中的元件，其包括正极，负极和浸渍有非水电解液的分离构件，正极与基座电连接。 负极通过分离部件重叠在正电极上而与盖部件电连接，并且允许阳离子和/或阴离子通过非水电解液在正极和负极之间移动。 盖构件由含有镍的金属材料形成。 负电极具有比正极更大的电容，