公开(公告)号：US20190051928A1

公开(公告)日：2019-02-14

申请号：US16079676

申请日：2017-02-22

Applicant: NEC Corporation

Inventor： Daisuke KAWASAKI ,  Takashi OHTSUKA ,  Suguru TAMAI ,  Noboru YOSHIDA ,  Shinya SUDO

IPC: H01M10/0525 ,  H01M10/0566 ,  H01M4/583 ,  H01M4/62 ,  H01M4/38 ,  H01M10/058

Abstract: A negative electrode active material constituting a lithium ion secondary battery having high energy density and excellent cycle characteristics, and a negative electrode and a lithium ion secondary battery comprising the same are provided. The present invention relates to a negative electrode active material comprising graphite particles and crystalline silicon particles, wherein a median diameter of the crystalline silicon particles is 0.7 μm or less, and a weight ratio of the crystalline silicon particles to the total weight of the graphite particles and the crystalline silicon particles is 1 wt % or more and 25 wt % or less.

公开(公告)号：US20200303743A1

公开(公告)日：2020-09-24

申请号：US16086188

申请日：2017-05-18

Applicant: NEC CORPORATION

Inventor： Noboru YOSHIDA ,  Makihiro OTOHATA ,  Shinya SUDO

IPC: H01M4/66 ,  H01M4/62 ,  H01M4/04 ,  H01M4/36 ,  H01M10/0569 ,  H01M10/0525 ,  H01M2/16

Abstract: Provided is an electrode for a battery which effectively suppress a short circuit between a positive electrode and a negative electrode at high temperature of the battery.The electrode includes a current collector 110, an active material layer 111 formed on at least one side of the current collector 110 and an insulating layer 112 formed on the surface of the active material layer 111. The electrode was formed so that peeling occurs between the current collector 110 and the active material layer 111 and the peeling strength was 10 mN/mm or more when a 90° peeling test was performed at a peeling rate of 100/min.

公开(公告)号：US20170317377A1

公开(公告)日：2017-11-02

申请号：US15521030

申请日：2015-10-27

Applicant: NEC Corporation

Inventor： Kazuhiko INOUE ,  Kenichi SHIMURA ,  Shinya SUDO ,  Noboru YOSHIDA

IPC: H01M10/05 ,  H01M2/02 ,  H01M10/04

CPC classification number: H01M10/05 ,  H01M2/02 ,  H01M2/0212 ,  H01M2/0237 ,  H01M2/1061 ,  H01M2/1077 ,  H01M2/204 ,  H01M2/206 ,  H01M2/30 ,  H01M2/348 ,  H01M10/049 ,  H01M2200/103 ,  H01M2220/10 ,  H01M2220/20

Abstract: In the present invention, a secondary battery comprises: a battery element (20) in which a positive pole plate and a negative pole plate are layered; a housing (10) for housing the battery element (20) and an electrolyte; electrode tabs (21, 25) of the positive electrode and the negative electrode that are led out from the housing (10); a fusing part (25b) that is formed in a part of the electrode tab and preferentially fuses if a predetermined current has flowed; and a reinforcing member (33) which is attached to an electrode tab at least at the section having the fusing part (25b), and which is attached so as to be separated from the housing.

公开(公告)号：US20230253566A1

公开(公告)日：2023-08-10

申请号：US18126123

申请日：2023-03-24

Applicant: NEC Corporation

Inventor： Noboru YOSHIDA ,  Makihiro OTOHATA ,  Shinya SUDO

IPC: H01M4/66 ,  H01M4/04 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0569 ,  H01M50/46

CPC classification number: H01M4/661 ,  H01M4/0433 ,  H01M4/364 ,  H01M4/366 ,  H01M4/623 ,  H01M10/0525 ,  H01M10/0569 ,  H01M50/46 ,  H01M2004/021

Abstract: Provided is an electrode for a battery which effectively suppress a short circuit between a positive electrode and a negative electrode at high temperature of the battery.
The electrode includes a current collector 110, an active material layer 111 formed on at least one side of the current collector 110 and an insulating layer 112 formed on the surface of the active material layer 111. The electrode was formed so that peeling occurs between the current collector 110 and the active material layer 111 and the peeling strength was 10 mN/mm or more when a 90° peeling test was performed at a peeling rate of 100/min.

公开(公告)号：US20180175451A1

公开(公告)日：2018-06-21

申请号：US15576073

申请日：2016-06-03

Applicant: NEC Corporation

Inventor： Kazuhiko INOUE ,  Makihiro OTOHATA ,  Shinya SUDO

IPC: H01M10/0585 ,  H01M2/16 ,  H01M2/02 ,  H01M10/0587

CPC classification number: H01M10/0585 ,  H01M2/0267 ,  H01M2/0287 ,  H01M2/1653 ,  H01M10/0587

Abstract: A film package battery 1 has a battery element (20) having a positive electrode, a negative electrode and a separator that are stacked or wound, wherein, at least at 200° C., the separator does not melt or soften and has a heat shrinkage ratio of 3% or less; a film package (10) enclosing the battery element; and a fixing tape (70) fixed to a part of the battery element and fixed to an inner surface of the film package.