公开(公告)号：US20170229711A1

公开(公告)日：2017-08-10

申请号：US15501690

申请日：2015-08-06

Applicant: GS Yuasa International Ltd.

Inventor： Yuto YAMAKAWA ,  Hidefumi HASEGAWA ,  Yohei SHIBATA ,  Shinya UEMATSU

IPC: H01M4/62 ,  H01M4/66 ,  H01M4/505 ,  H01M4/525 ,  H01G11/28 ,  H01M10/0525

CPC classification number: H01M4/623 ,  H01G11/28 ,  H01G11/70 ,  H01M4/139 ,  H01M4/505 ,  H01M4/525 ,  H01M4/624 ,  H01M4/625 ,  H01M4/661 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: A purpose of the present invention is to provide a technique for still further improving safety by increasing the resistance change ratio in a high-temperature range in a nonaqueous electrolyte energy storage device, the internal resistance of which increases with an increase in internal temperature. In a positive electrode plate for nonaqueous electrolyte energy storage device, an intermediate layer containing an electrically conducting agent and a binder is provided between a positive electrode current collector and a positive composite layer, and as the binder in the intermediate layer, one having a mass average molecular weight larger than that of a binder in the positive composite layer is used. Consequently, the resistance change ratio in a high-temperature range can be increased.

公开(公告)号：US20230055952A1

公开(公告)日：2023-02-23

申请号：US17778740

申请日：2020-11-20

Applicant: GS Yuasa International Ltd.

Inventor： Yuta NAKAMURA ,  Yohei SHIBATA

IPC: H01M4/525 ,  H01M4/505

Abstract: An energy storage device according to an aspect of the present invention includes: a positive electrode including a positive active material layer; a negative electrode; and a nonaqueous electrolyte, the positive active material layer includes boron and aluminum, and a maximum voltage width that is a difference between a charge upper limit voltage and a discharge lower limit voltage under normal usage is 1.1 V or less.