公开(公告)号：US20190393465A1

公开(公告)日：2019-12-26

申请号：US16480955

申请日：2018-01-25

Applicant: NEC CORPORATION

Inventor： Noboru YOSHIDA ,  Kazuhiko INOUE ,  Kenichi SHIMURA

IPC: H01M2/16 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/62 ,  B60L50/64

Abstract: A purpose of one embodiment of the present invention is to provide a highly safe lithium ion secondary battery comprising a layered lithium nickel composite oxide with high nickel content and a polyethylene terephthalate separator. The first lithium ion secondary battery of the present invention is characterized by comprising a positive electrode comprising a positive electrode mixture layer and an insulation layer, and a separator comprising polyethylene terephthalate, wherein the positive electrode mixture layer comprises a layered lithium nickel composite oxide having a nickel ratio of 60 mol % or more based on metals other than lithium.

公开(公告)号：US20180175449A1

公开(公告)日：2018-06-21

申请号：US15572568

申请日：2016-05-09

Applicant: NEC CORPORATION

Inventor： Jiro IRIYAMA ,  Kenichi SHIMURA ,  Kazuhiko INOUE

IPC: H01M10/0567 ,  H01M2/16 ,  H01M4/131 ,  H01M10/0525 ,  H01M4/525 ,  H01M10/058

Abstract: There is provided a lithium ion secondary battery having a positive electrode comprising a lithium nickel composite oxide as a positive electrode active material and a separator consisting of one or more layers selected from polyimide layer, polyamide layer, the battery having a low self-discharge failure rate even after long term storage. The present invention relates to a lithium ion secondary battery having a positive electrode comprising a lithium nickel composite oxide and a separator consisting of one or more layers selected from polyimide layer, polyamide layer, and polyamide imide layer, wherein the battery comprises an acid and/or an acid anhydride in an electrolyte solution and/or a member in contact with the electrolyte solution.

公开(公告)号：US20180076486A1

公开(公告)日：2018-03-15

申请号：US15554556

申请日：2016-03-04

Applicant: NEC CORPORATION

Inventor： Takehiro NOGUCHI ,  Kenichi SHIMURA ,  Shin SERIZAWA ,  Yuukou KATOU ,  Takuya HASEGAWA

IPC: H01M10/0569 ,  H01M10/052 ,  H01M10/058 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0567 ,  H01M4/131

CPC classification number: H01M10/0569 ,  H01M2/16 ,  H01M2/162 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/058 ,  H01M10/0585 ,  H01M2220/20 ,  H01M2300/0034 ,  H01M2300/0037 ,  H01M2300/004 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: A lithium ion secondary battery excellent in cycle characteristics and rate characteristics is provided. The present invention relates to a lithium secondary battery having an electrolyte solution comprising one or more compounds selected from a fluorinated ether and a fluorinated phosphate ester and a separator comprising an aramid resin.

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：US20230155165A1

公开(公告)日：2023-05-18

申请号：US18156740

申请日：2023-01-19

Applicant: NEC CORPORATION

Inventor： Kazuhiko INOUE ,  Noboru YOSHIDA ,  Kenichi SHIMURA

IPC: H01M10/0525 ,  H01M10/0585 ,  H01M4/13 ,  H01M10/42 ,  H01M10/04 ,  H01M4/62 ,  H01M50/44 ,  H01M50/429 ,  H01M50/423 ,  H01M50/414

CPC classification number: H01M10/0525 ,  H01M10/0585 ,  H01M4/13 ,  H01M10/4235 ,  H01M10/0463 ,  H01M4/62 ,  H01M50/44 ,  H01M50/4295 ,  H01M50/423 ,  H01M50/414 ,  H01M4/623 ,  H01M4/485

Abstract: The lithium ion secondary battery is a secondary battery in which a positive electrode 30 and a negative electrode 40 are stacked alternatively via a separator 25, wherein the separator 25 is a single layer and is not melted or softened at least 200° C., a thermal shrinkage ratio of the separator being 3% or below, wherein an insulating layer 70 is formed on a surface of the positive electrode 30, the surface facing to the separator 25.

公开(公告)号：US20190123319A1

公开(公告)日：2019-04-25

申请号：US16094353

申请日：2017-04-18

Applicant: NEC Corporation

Inventor： Kenichi SHIMURA ,  Kazuhiko INOUE

IPC: H01M2/16 ,  H01M10/04

Abstract: Provided is a battery comprising a separator comprising inorganic particles for preventing a short-circuit, wherein the inorganic particles are not removed readily from the separator. This battery is characterized by comprising a separator comprising a base material resin having voids and an inorganic particle having a surface (A) facing the void and a surface (B) in contact with the resin, wherein the length of the surface (A) is 50% or more of the length of the outer periphery of the particle in a cross-sectional SEM photograph of the separator.

公开(公告)号：US20180358649A1

公开(公告)日：2018-12-13

申请号：US15743903

申请日：2016-07-27

Applicant: NEC CORPORATION

Inventor： Kazuhiko INOUE ,  Noboru YOSHIDA ,  Kenichi SHIMURA

IPC: H01M10/0525 ,  H01M10/0585 ,  H01M4/62 ,  H01M2/16

CPC classification number: H01M10/0525 ,  H01M2/16 ,  H01M2/1626 ,  H01M4/13 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M4/623 ,  H01M10/052 ,  H01M10/0585 ,  H01M2004/027 ,  H01M2004/028

Abstract: The lithium ion secondary battery is a secondary battery in which a positive electrode 30 and a negative electrode 40 are stacked alternatively via a separator 25, wherein the separator 25 is a single layer and is not melted or softened at least 200° C., a thermal shrinkage ratio of the separator being 3% or below, wherein an insulating layer 70 is formed on a surface of the positive electrode 30, the surface facing to the separator 25.

公开(公告)号：US20180040867A1

公开(公告)日：2018-02-08

申请号：US15555454

申请日：2016-03-04

Applicant: NEC CORPORATION

Inventor： Kenichi SHIMURA ,  Noboru YOSHIDA ,  Kazuhiko INOUE

IPC: H01M2/16 ,  H01M10/052 ,  H01M4/04 ,  H01M10/04 ,  H01M4/62

Abstract: The separator for secondary battery, comprising: a porous substrate having a melting temperature or a decomposition temperature of 200° C. or more; and a resin member formed at least inside of the substrate in a plane section that occupies at least a part of a plane along with a thickness direction of the substrate; wherein said resin member is coated on inner surfaces of pores without completely blocking connecting paths that connects pores of the porous member, and wherein a distribution density of the resin member becomes lower toward inside of the substrate.

公开(公告)号：US20180013169A1

公开(公告)日：2018-01-11

申请号：US15534241

申请日：2015-12-08

Applicant: NEC Corporation

Inventor： Daisuke KAWASAKI ,  Kenichi SHIMURA ,  Hitoshi ISHIKAWA

IPC: H01M10/0525 ,  H01M2/16 ,  H01M4/587 ,  H01M4/525 ,  H01M4/02

CPC classification number: H01M10/0525 ,  H01M2/16 ,  H01M2/162 ,  H01M4/13 ,  H01M4/364 ,  H01M4/483 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M2004/028 ,  H01M2220/20 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: A secondary battery in which heat resistance is excellent and the formation of lithium dendrite is suppressed is provided. The present invention relates to a secondary battery comprising an electrode element comprising a positive electrode, a negative electrode and a separator, wherein the negative electrode comprises a carbon material (a) capable of absorbing and desorbing lithium ions and an oxide (b) capable of absorbing and desorbing lithium ions, and the separator comprises 50% by mass or more of a non-woven fabric having a thermal melting or thermal decomposition temperature of 160° C. or more.

公开(公告)号：US20170237060A1

公开(公告)日：2017-08-17

申请号：US15502676

申请日：2015-08-05

Applicant: NEC CORPORATION

Inventor： Kazuhiko INOUE ,  Kenichi SHIMURA

IPC: H01M2/34 ,  H01M2/08 ,  H01M10/42 ,  H01M2/30 ,  H01M2/06

Abstract: With a battery using a flexible outer package, electric current is reliably interrupted when the temperature is increased due to the occurrence of abnormality, thereby preventing excessive heat generation. A battery 1 includes a battery element 10, a pair of first terminals 11 that are electrically connected to the battery element 10, a flexible outer package 13, and a second terminal 12. The outer package 13 is partitioned into a first chamber 13a in which the battery element 10 is sealed and a second chamber 13b which is adjacent to the first chamber 13a. The second terminal 12 is led out from the second chamber 13b to the outside of the outer package 13 so that one first terminal 11 is made electrically connectable to an external wiring through the second chamber 13b. A gas generation material 14 which generates a gas at a predetermined temperature or higher is sealed in the second chamber 13b.