公开(公告)号：US20180248192A1

公开(公告)日：2018-08-30

申请号：US15760477

申请日：2016-09-16

Applicant: NEC Corporation

Inventor： Shin SERIZAWA ,  Kazuhiko INOUE

IPC: H01M4/62 ,  C08G73/10 ,  H01M4/36 ,  H01M10/0525

CPC classification number: H01M4/622 ,  C08G73/1021 ,  C08G73/1042 ,  C08G73/1046 ,  C08G73/1053 ,  C08G73/1071 ,  C08G73/1082 ,  C08G73/14 ,  C08K5/09 ,  C08L79/08 ,  H01M4/13 ,  H01M4/366 ,  H01M10/0525

Abstract: An object of the present invention is to provide a polyimide binder which can be prepared under lower temperature conditions. The binder composition for a secondary battery of the present invention is characterized in comprising a polyamic acid and an aromatic compound comprising an electron donating group and an organic acid group.

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：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：US20150318577A1

公开(公告)日：2015-11-05

申请号：US14649026

申请日：2013-11-28

Applicant: NEC CORPORATION

Inventor： Shinsaku SAITHO ,  Hitoshi ISHIKAWA ,  Kazuhiko INOUE

IPC: H01M10/0569 ,  H01M10/04 ,  H01M10/0525

CPC classification number: H01M10/0569 ,  H01M10/049 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2300/0034 ,  H01M2300/0037 ,  Y02T10/7011 ,  Y10T29/49112

Abstract: The present invention relates to an electrolyte solution for a lithium secondary battery, which contains a sulfonate compound represented by a specific formula and carboxylic anhydride having one or more C═C double bonds, and a lithium secondary battery using the same.

Abstract translation: 本发明涉及一种锂二次电池用电解质溶液，其包含由特定式表示的磺酸盐化合物和具有一个或多个C = C双键的羧酸酐和使用该二次电池的锂二次电池。

公开(公告)号：US20200035996A1

公开(公告)日：2020-01-30

申请号：US16337646

申请日：2017-09-28

Applicant: NEC CORPORATION

Inventor： Kazuhiko INOUE ,  Shin SERIZAWA

IPC: H01M4/139 ,  H01M4/60 ,  H01M2/10 ,  H01M4/62

Abstract: The purpose of the present invention is to provide an electrode with reduced thermal deterioration even though the electrode has an insulating layer comprising a polyimide. The present invention relates to an electrode comprising a current collector and an electrode mixture layer, wherein the electrode comprises an insulating layer comprising a polyimide and an aromatic compound having an electron donating group and an organic acid group.

公开(公告)号：US20180115015A1

公开(公告)日：2018-04-26

申请号：US15560833

申请日：2016-03-24

Applicant: NEC Corporation

Inventor： Kazuhiko INOUE ,  Kenichi SHIMURA ,  Daisuke KAWASAKI ,  Noboru YOSHIDA

IPC: H01M10/0525 ,  H01M4/587 ,  H01M4/38 ,  H01M4/36 ,  H01M4/48 ,  H01M2/16 ,  B60L11/18

CPC classification number: H01M10/0525 ,  B60L50/64 ,  H01M2/16 ,  H01M2/1653 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/364 ,  H01M4/38 ,  H01M4/386 ,  H01M4/48 ,  H01M4/483 ,  H01M4/587 ,  H01M10/058 ,  H01M2004/027 ,  H01M2220/20 ,  Y02T10/7011

Abstract: Provided is a lithium ion secondary battery with high safety and high energy density which solves a concern about the safety, when a large amount of metal is used in a negative electrode active materials to achieve higher energy density and therefore an acceptable amount of lithium in a carbon material of the negative electrode is smaller than a releasable amount of lithium in a positive electrode active material. The present invention relates to a lithium ion secondary battery, wherein the positive electrode has a charge capacity per unit area of 3 mAh/cm2 or more, the negative electrode comprises a metal and/or a metal oxide and a carbon as negative electrode active materials, the acceptable amount of lithium in the carbon in the negative electrode is less than the releasable amount of lithium from the positive electrode, and the separator has a thermal shrinkage coefficient of less than 3% at a boiling point of the electrolyte solution in the electrolyte solution.

公开(公告)号：US20180076479A1

公开(公告)日：2018-03-15

申请号：US15560373

申请日：2016-03-22

Applicant: NEC CORPORATION

Inventor： Daisuke KAWASAKI ,  Kenichi SHlMURA ,  Noboru YOSHIDA ,  Kazuhiko INOUE ,  Jiro IRIYAMA

IPC: H01M10/0525 ,  H01M4/38 ,  H01M4/36 ,  H01M4/02 ,  H01M2/14 ,  H01M2/16

CPC classification number: H01M10/0525 ,  H01M2/145 ,  H01M2/1626 ,  H01M2/1633 ,  H01M2/1653 ,  H01M4/02 ,  H01M4/131 ,  H01M4/364 ,  H01M4/38 ,  H01M4/525 ,  H01M10/04 ,  H01M10/0567 ,  H01M10/058 ,  Y02T10/7011

Abstract: The present invention relates to a lithium ion secondary battery comprising an electrode element comprising a positive electrode, a negative electrode and a separator, and an electrolyte solution, wherein the separator has a shrinking ratio of 2% or less by heat treatment at 90 ° C. for 6 hours, and a contest of physically adsorbed water of the electrode element is 2% by mass or less, or a content of chemically adsorbed water in a positive electrode active material layer of the positive electrode is 1% by mass or less.

公开(公告)号：US20180026256A1

公开(公告)日：2018-01-25

申请号：US15550668

申请日：2016-02-09

Applicant: NEC Corporation

Inventor： Kazuhiko INOUE ,  Kenichi SHIMURA

IPC: H01M2/34 ,  H01M10/058 ,  H01M10/0525

CPC classification number: H01M2/348 ,  H01M2/1022 ,  H01M2/1061 ,  H01M2/1072 ,  H01M2/20 ,  H01M2/30 ,  H01M2/345 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/058 ,  H01M2200/10 ,  H01M2200/20 ,  H01M2220/20 ,  Y02E60/122

Abstract: Provided is a battery capable of surely interrupting current at the time of temperature rise so that excessive heat generation does not occur at the occurrence of an abnormality. The battery 1 includes a battery element 10 including a positive electrode and a negative electrode, an inner package 13 which forms a first chamber 13a for enclosing the battery element 10, an outer package 14 which encloses the inner package 13 such that the outer package 14 forms a second chamber 14a which surrounds the first chamber 13a, and a pair of terminals 11, 12 electrically connected to the positive electrode and the negative electrode and led out to the outside of the outer package 14. One terminal 11 of the pair of terminals 11, 12 has a first terminal 11a and a second terminal 11b arranged so as to be electrically connected in the second chamber 13a. A gas generating material 14 which generates gas at a predetermined temperature or higher or a predetermined voltage or higher is enclosed in the first chamber 13a or the second chamber 14a.

公开(公告)号：US20150340679A1

公开(公告)日：2015-11-26

申请号：US14650402

申请日：2013-11-12

Applicant: NEC CORPORATION

Inventor： Kenichi SHIMURA ,  Kazuhiko INOUE

IPC: H01M2/16 ,  H01M10/0525 ,  H01M2/14

CPC classification number: H01M2/145 ,  H01G11/52 ,  H01M2/1613 ,  H01M2/1673 ,  H01M2/1686 ,  H01M10/052 ,  H01M10/0525 ,  Y02E60/13 ,  Y02T10/7022 ,  Y10T156/10

Abstract: The present invention provides a separator drastically reducing the short-circuit between electrodes and having satisfactory ionic conductivity on the basis of the use of inorganic materials. The separator 23 has a substrate 23a including a layer formed by using an inorganic material so as to have a plurality of openings, and an inorganic fiber layer 23b laminated on one surface or both surfaces of the substrate 23a so as to cover the openings of the substrate 23a without blocking the openings of the substrate 23a. The thickness of the separator 23 is 100 μm or less.

Abstract translation: 本发明提供了一种分离器，其基于无机材料的使用，大大降低了电极之间的短路并且具有令人满意的离子导电性。 隔板23具有包括通过使用无机材料形成为具有多个开口的层的基板23a和层叠在基板23a的一个表面或两个表面上的无机纤维层23b，以覆盖基板23a的开口 衬底23a而不阻挡衬底23a的开口。 隔板23的厚度为100μm以下。

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.