公开(公告)号：US20160218327A1

公开(公告)日：2016-07-28

申请号：US14995317

申请日：2016-01-14

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Minoru TAKAHASHI ,  Daisuke SUZAWA ,  Nozomi UTO

IPC: H01M2/02 ,  H01M10/0525

CPC classification number: H01M2/0202 ,  H01M2/0275 ,  H01M2/08 ,  H01M10/0525 ,  H01M2220/30

Abstract: In the case where a film having lower strength than a metal can is used as an exterior body of a secondary battery, a current collector provided in a region surrounded by the exterior body, an active material layer provided on a surface of the current collector, or the like might be damaged when force is externally applied to the secondary battery. A secondary battery resistant to external force is provided. A cushioning material is provided in a region sandwiched by an exterior body of the secondary battery. Specifically, the cushioning material is provided on the periphery of an electrode group including a positive electrode current collector, a positive electrode active material layer formed on at least one surface of the positive electrode current collector, a separator, a negative electrode current collector, and a negative electrode active material layer formed on at least one surface of the negative electrode current collector.

Abstract translation: 在使用具有比金属罐低的强度的膜作为二次电池的外部体的情况下，设置在由外部主体包围的区域中的集电体，设置在集电体的表面上的活性物质层， 当外力施加到二次电池时可能损坏等。 提供了耐外力的二次电池。 缓冲材料设置在由二次电池的外部主体夹持的区域中。 具体地说，缓冲材料设置在包括正极集电体的电极组的周围，形成在正极集电体的至少一个表面上的正极活性物质层，隔膜，负极集电体和 形成在所述负极集电体的至少一个面上的负极活性物质层。