公开(公告)号：US20150372338A1

公开(公告)日：2015-12-24

申请号：US14762649

申请日：2013-12-09

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kenji TSUCHIYA ,  Shigeru SUZUKI ,  Takahiko NAKANO ,  Katsushi ENOKIHARA ,  Atsushi SUGIHARA ,  Shuji TSUTSUMI ,  Naoyuki WADA ,  Hideki SANO ,  Tatsuya HASHIMOTO

IPC: H01M10/04 ,  H01M4/36 ,  H01M4/1391 ,  H01M4/1393 ,  H01M10/0525 ,  H01M4/04

CPC classification number: H01M10/0431 ,  H01M4/0404 ,  H01M4/0411 ,  H01M4/0471 ,  H01M4/13 ,  H01M4/139 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/366 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2004/021 ,  Y10T29/49117

Abstract: A non-aqueous electrolyte secondary battery includes an electrode wound body formed by winding positive and negative electrode sheets with separators interposed therebetween. The positive electrode sheet is manufactured through a coating process wherein a positive electrode mixture paste is applied to a current collecting sheet to form a mixture layer. Prior to the coating process, sections of the current collecting sheet to be uncoated and to be coated are differentiated in terms of wettability. Alternatively, a positive electrode mixture paste with viscosities at slow and fast shear velocities within a predetermined range is used. Thus, the cross-sectional shape of the width-direction end of the mixture layer includes a steep cross-sectional shape, wherein the width of a section as thin as or thinner than 50% of a thickness of a width-direction center flat portion of the mixture layer is 100 μm or less.

Abstract translation: 非水电解质二次电池包括通过将正极和负极片卷绕在其间的隔膜形成的电极卷绕体。 通过涂布法制造正极片，其中将正极混合糊剂施加到集电片以形成混合层。 在涂布过程之前，待涂覆的待收集片材的部分在润湿性方面是不同的。 或者，使用具有在预定范围内的缓慢和快速剪切速度的粘度的正极混合物糊料。 因此，混合层的宽度方向端的截面形状包括陡峭的横截面形状，其中，宽度方向中央平坦部的厚度的50％以上的部分的宽度 的混合物层为100μm以下。

公开(公告)号：US20190123357A1

公开(公告)日：2019-04-25

申请号：US16139129

申请日：2018-09-24

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Koji TORITA ,  Shuji TSUTSUMI ,  Yusuke FUKUMOTO

IPC: H01M4/62 ,  H01M10/0525

Abstract: A positive electrode for a non-aqueous electrolyte secondary battery includes a positive electrode current collector, a protective layer provided on a surface of the positive electrode current collector, and a positive electrode composite material layer containing a positive electrode active material provided on a surface of the protective layer. The protective layer includes an insulating filler, a binder, and a conductive material. The protective layer is composed of a central portion and an end portion in a plan view as seen from the stacking direction. The ratio of the conductive material in the end portion of the protective layer is smaller than the ratio of the conductive material in the central portion of the protective layer. The ratio Sc/S of the area Sc of the end portion of the protective layer to the total area S of the protective layer in plan view is 0.12 or more.

公开(公告)号：US20170092951A1

公开(公告)日：2017-03-30

申请号：US15273981

申请日：2016-09-23

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroya UMEYAMA ,  Koji TORITA ,  Akihiro TANIGUCHI ,  Shuji TSUTSUMI ,  Tatsuya HASHIMOTO

IPC: H01M4/587 ,  H01M10/0587 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/587 ,  H01M4/133 ,  H01M4/625 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2004/027 ,  H01M2220/20 ,  Y02T10/7011

Abstract: The present teaching provides a lithium ion secondary battery particularly improved in durability against high-rate charging/discharging. The lithium ion secondary battery of the present teaching includes, in the negative electrode active material layer, a negative electrode active material formed of a graphite type carbon material having a graphite structure in at least a part thereof, and a conductive carbon material, which is different from the graphite type carbon material and is formed of a conductive amorphous carbon. The negative electrode active material has a bulk density of 0.5 g/cm3 or more and 0.7 g/cm3 or less, and a BET specific surface area of 2 m2/g or more and 6 m2/g or less. The conductive carbon material has a bulk density of 0.4 g/cm3 or less, and a BET specific surface area of 50 m2/g or less.

公开(公告)号：US20180076450A1

公开(公告)日：2018-03-15

申请号：US15676416

申请日：2017-08-14

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Koji TORITA ,  Tatsuya HASHIMOTO ,  Keiichi TAKAHASHI ,  Akihiro TANIGUCHI ,  Shuji TSUTSUMI ,  Yusuke FUKUMOTO ,  Yuji YOKOYAMA

IPC: H01M4/36 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/131

CPC classification number: H01M4/364 ,  C01G45/1228 ,  C01G51/50 ,  C01G53/50 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028 ,  Y02T10/7011

Abstract: A method of manufacturing a non-aqueous electrolyte solution secondary battery includes: (A) preparing a first composite material by mixing a first positive electrode active material, a first conductive material and a first binder; (B) preparing a second composite material by mixing a second positive electrode active material, a second conductive material and a second binder; and (C) manufacturing a positive electrode by forming a positive electrode composite layer including the first composite material and the second composite material. The first positive electrode active material has an average discharge potential lower than that of the second positive electrode active material. The first conductive material has a first OAN. The second conductive material has a second OAN. A ratio of the second OAN to the first OAN is 1.3 or more and 2.1 or less. A sum of the first OAN and the second OAN is 31.64 ml/100 g or less.

公开(公告)号：US20170256788A1

公开(公告)日：2017-09-07

申请号：US15509641

申请日：2015-09-08

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroya UMEYAMA ,  Keiichi TAKAHASHI ,  Shuji TSUTSUMI ,  Tatsuya HASHIMOTO

IPC: H01M4/36 ,  H01M4/02 ,  H01M10/0567 ,  H01M2/16 ,  H01M10/052 ,  H01M4/58 ,  H01M10/42

CPC classification number: H01M4/36 ,  H01M2/1686 ,  H01M4/02 ,  H01M4/131 ,  H01M4/362 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/4235 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/0025

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator. The positive electrode includes a positive electrode current collector, a first positive electrode mixture layer that is provided on the positive electrode current collector, and a second positive electrode mixture layer that is provided on the first positive electrode mixture layer. The first positive electrode mixture layer includes a first positive electrode active material and a first conductive material. The second positive electrode mixture layer includes a second positive electrode active material and a second conductive material. The first positive electrode active material includes a lithium composite oxide having a layered crystal structure. The second positive electrode active material includes a lithium composite oxide having an olivine-type crystal structure. The second conductive material includes a conductive material having a higher crushing strength than the lithium composite oxide having an olivine-type crystal structure.

公开(公告)号：US20160248085A1

公开(公告)日：2016-08-25

申请号：US14980202

申请日：2015-12-28

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroya UMEYAMA ,  Akihiro TANIGUCHI ,  Shuji TSUTSUMI ,  Tatsuya HASHIMOTO

IPC: H01M4/36 ,  H01M4/04

CPC classification number: H01M4/366 ,  H01M4/043 ,  H01M4/13 ,  H01M4/139 ,  H01M4/624 ,  H01M2004/021

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode composite material layer, the positive electrode composite material layer including: a composite particle including a positive electrode active material, a first conductive material and a binder; and a second conductive material arranged on a surface of the composite particle and having a DBP oil absorption number smaller than that of the first conductive material.

Abstract translation: 非水电解质二次电池包括正极复合材料层，所述正极复合材料层包括：包含正极活性材料，第一导电材料和粘合剂的复合颗粒; 以及布置在所述复合颗粒的表面上并且具有比所述第一导电材料的DBP吸油量小的DBP吸油量的第二导电材料。

公开(公告)号：US20130149466A1

公开(公告)日：2013-06-13

申请号：US13706764

申请日：2012-12-06

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takahiko NAKANO ,  Kenji TSUCHIYA ,  Shuji TSUTSUMI ,  Tatsuya HASHIMOTO

IPC: H01M4/04

CPC classification number: H01M4/0404 ,  H01M4/70 ,  H01M10/0525 ,  Y02T10/7011

Abstract: An electrode manufacturing method includes: a coating process of applying a coating material to a metal foil while the metal foil is fed forward to form a coated foil; and a drying process of drying the coated foil by heating while the coated foil is fed forward to pass through a drying oven of a drying machine placed in line on a feeding path. The drying oven includes at least a first drying chamber which the coated foil first passes through in the drying process and a second drying chamber which the coated foil passes through following the first drying chamber. The first drying chamber has a smaller area in cross section perpendicular to the feed direction along the feeding path than an area of the second drying chamber to provide a smaller volume than a volume of the second drying chamber.

Abstract translation: 一种电极制造方法，其特征在于，包括以下步骤：在金属箔向前方施加涂布材料至金属箔的涂布工序，形成被覆箔; 以及通过加热干燥涂覆的箔的干燥过程，同时将涂覆的箔向前馈送通过烘干机的干燥烘箱放置在进料路径上。 干燥箱包括至少第一干燥室，涂覆的箔首先在干燥过程中通过;第二干燥室，涂覆的箔经过第一干燥室后通过。 所述第一干燥室具有比所述第二干燥室的区域垂直于所述进料方向垂直于所述进料方向的面积小于所述第二干燥室的面积以提供比所述第二干燥室的体积更小的体积。