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：US20190245249A1

公开(公告)日：2019-08-08

申请号：US16318402

申请日：2017-07-20

Applicant: NEC Corporation

Inventor： Makihiro OTOHATA

IPC: H01M10/0585 ,  H01M4/62 ,  H01M4/36

CPC classification number: H01M10/0585 ,  H01M2/26 ,  H01M4/02 ,  H01M4/04 ,  H01M4/366 ,  H01M4/628 ,  H01M10/04 ,  H01M2004/021

Abstract: A purpose of the present invention is to provide an electrode assembly and a manufacturing method therefor that can favorably suppress a short circuit that is due to a burr created by punching. At least one of the cathode 11 and the anode 12 of the electrode assembly of the present invention has the maximum height of the burrs 11b and 12b at the portion where the outer peripheral edge of the cathode 11 and the outer peripheral edge of the anode 12 of the opposing cathode 11 and the anode 12 are close to each other, among the peripheral edge of the cathode 11 and the peripheral edge of the anode 12, the maximum height of burrs in the remaining portion other than the portion where they are close to each other is smaller.

公开(公告)号：US20190165368A1

公开(公告)日：2019-05-30

申请号：US16188522

申请日：2018-11-13

Applicant: NEC CORPORATION

Inventor： Makihiro OTOHATA ,  Noboru YOSHIDA

IPC: H01M4/139 ,  H01M4/04 ,  H01M4/36 ,  H01M10/058

Abstract: Provided is a method for manufacturing a electrode for a secondary battery in which the electrode has a first layer and a second layer laminated on a current collector. The method comprising applying a slurry for a first layer to a surface of a current collector, applying a slurry for a second layer to the slurry for the first layer before the slurry for the first layer is dried, and drying the slurries for the first layer and the second layer after applying the slurries for the first layer and the second layer to obtain a laminated structure in which the first layer and the second layer are laminated in this order on the current collector. A first binder or thickener for the slurry for the first layer and a second binder or thickener for the slurry for the second layer are selected such that when viscosities are measured for a first solution including solvent and the first binder or thickener dissolved in the solvent in a specific mass ration and a second solution including a solvent and the second binder or thickener dissolved in the solvent at the same mass ration as the mass ration of the first binder or thickener under the same conditions, the viscosity of the first solution is higher than the viscosity of the second solution.

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.

公开(公告)号：US20170005318A1

公开(公告)日：2017-01-05

申请号：US15125927

申请日：2015-03-25

Applicant: NEC CORPORATION

Inventor： Makihiro OTOHATA

IPC: H01M2/26 ,  H01M10/04 ,  H01M10/42 ,  H01M10/0525

CPC classification number: H01M2/266 ,  H01G11/16 ,  H01G11/26 ,  H01G11/28 ,  H01G11/52 ,  H01G11/66 ,  H01G11/72 ,  H01G11/76 ,  H01G11/86 ,  H01M2/30 ,  H01M4/02 ,  H01M10/0413 ,  H01M10/0436 ,  H01M10/0459 ,  H01M10/0525 ,  H01M10/4235 ,  Y02E60/13

Abstract: There is provided a laminated-type battery prevented from short-circuit between a positive electrode and a negative electrode, suppressed in a local increase in the thickness of the battery, and high in electric properties and the reliability. The laminated-type battery includes a battery element having at least two sheets of first-polarity electrodes each laminated with a second-polarity electrode with a separator therebetween, wherein the first-polarity electrode includes an electrode section having an active material layer formed on a current collector, a lead section having no active material layer formed on the current collector, and an insulating layer disposed over from the active material layer to an active material layer-non-formed region on a boundary region of the electrode section and the lead section, wherein the insulating layer of the one first-polarity electrode and the insulating layer of the another first-polarity electrode are formed at least partly on different positions as viewed in the lamination direction.

Abstract translation: 提供一种在正电极和负电极之间防止短路的层叠型电池，在电池厚度的局部增加中被抑制，并且电性能和可靠性高。 层叠型电池包括：电池元件，其具有至少两片第一极性电极，每个第一极性电极层叠有分隔物之间的第二极性电极，其中所述第一极性电极包括具有形成在所述第一极性电极上的活性物质层的电极部分 集电体，在集电体上形成没有活性物质层的引线部，以及从活性物质层向电极部和引线部的边界区域的活性物质层非形成区域配置的绝缘层 其中，所述一个第一极性电极的绝缘层和所述另一个第一极性电极的绝缘层至少部分地形成在层叠方向上观察的不同位置上。

公开(公告)号：US20160308252A1

公开(公告)日：2016-10-20

申请号：US15103402

申请日：2014-08-08

Applicant: NEC CORPORATION

Inventor： Jiro IRIYAMA ,  Makihiro OTOHATA ,  Kazuaki MATSUMOTO ,  Ikiko SHIMANUKI

IPC: H01M10/0585 ,  H01M2/12 ,  H01M10/44 ,  H01M2/36

CPC classification number: H01M10/0585 ,  H01M2/12 ,  H01M2/36 ,  H01M2/361 ,  H01M2/362 ,  H01M2/365 ,  H01M10/05 ,  H01M10/0569 ,  H01M10/058 ,  H01M10/446

Abstract: It is an object of the present invention to provide a method for producing a secondary battery in which water in the outer package can be removed even when the secondary battery includes an electrolytic solution containing a halogen-containing compound. The present exemplary embodiment is a method for producing a secondary battery including an electrolytic solution containing a supporting salt, a nonaqueous solvent, and a halogen-containing compound, an electrode assembly including a negative electrode and a positive electrode, and an outer package, the method including (1) disposing a first solution containing at least the supporting salt and the nonaqueous solvent, and the electrode assembly in the outer package; (2) charging the electrode assembly; (3) emitting from the outer package a gas generated by the charge; and (4) injecting a second solution including at least the halogen-containing compound into the outer package after the gas is emitted, wherein the first solution does not contain the halogen-containing compound, and the electrolytic solution includes the first solution and the second solution.

Abstract translation: 本发明的目的是提供一种二次电池的制造方法，其中即使在二次电池包含含有卤素化合物的电解液的情况下也可以除去外包装中的水分。 本示例性实施方式是一种二次电池的制造方法，其包括含有支持盐，非水溶剂和含卤素化合物的电解液，包含负极和正极的电极组件和外包装， 方法包括（1）在外包装中设置至少含有支持盐和非水溶剂的第一溶液和电极组件; （2）对电极组件进行充电; （3）从外包装发射由电荷产生的气体; 和（4）在排出气体之后，将至少包含含卤素化合物的第二溶液注入到外包装中，其中第一溶液不含有含卤素的化合物，并且电解液包括第一溶液和第二溶液 解。