公开(公告)号：US20190341619A1

公开(公告)日：2019-11-07

申请号：US16397614

申请日：2019-04-29

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideyuki SAKA

IPC: H01M4/62 ,  H01M10/0567 ,  H01M4/04 ,  H01M10/44

Abstract: A battery assembly disclosed herein is a battery assembly before being subjected to initial charge. In the battery assembly, a positive electrode has a positive electrode mixture layer that contains a positive electrode active material and NMP, and an oxalate complex compound and FSO3Li are contained in a nonaqueous electrolyte solution. In the battery assembly disclosed herein, a NMP content in the positive electrode mixture layer is 50 ppm to 1500 ppm, the DBP oil absorption of the positive electrode active material is 30 ml/100 g to 45 ml/100 g, and a FSO3Li content in the nonaqueous electrolyte solution is 0.1 wt % to 1.0 wt %. With this, it is possible to prevent a reduction in input-output characteristics caused by formation of a film derived from NMP on the surface of the positive electrode active material, and hence it is possible to prevent an increase in facility cost and a reduction in manufacturing efficiency caused by adjustment of the content of NMP.

公开(公告)号：US20170069906A1

公开(公告)日：2017-03-09

申请号：US15242753

申请日：2016-08-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideyuki SAKA ,  Yukihiro OKADA

IPC: H01M4/04 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/485 ,  H01M4/62

CPC classification number: H01M4/0404 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/485 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/4235 ,  H01M2004/028

Abstract: A method of manufacturing a non-aqueous liquid electrolyte secondary battery is to manufacture a non-aqueous liquid electrolyte secondary battery including a positive electrode mixture layer containing a lithium-containing transition metal oxide as a positive electrode active material. The manufacturing method includes: mixing the positive electrode active material and an aromatic nitrile compound such that a mass ratio of the aromatic nitrile compound to the positive electrode active material is not less than 0.1% by mass and not more than 4% by mass, to prepare a mixture; mixing the mixture, a conductive material, a binder, and a solvent to prepare a granular body; and disposing the granular body on a surface of a positive electrode collector to form at least a part of the positive electrode mixture layer.

Abstract translation: 非水电解液二次电池的制造方法是制造含有含有锂的过渡金属氧化物作为正极活性物质的正极合剂层的非水电解质二次电池。 制造方法包括：使正极活性物质和芳香族腈化合物混合，使得芳香族腈化合物与正极活性物质的质量比为0.1质量％以上且4质量％以下，相对于 准备混合物 混合混合物，导电材料，粘合剂和溶剂以制备颗粒体; 将该粒状体设置在正极集电体的表面上，形成正极合剂层的至少一部分。

公开(公告)号：US20210249661A1

公开(公告)日：2021-08-12

申请号：US17243665

申请日：2021-04-29

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideyuki SAKA

IPC: H01M4/62 ,  H01M4/04 ,  H01M10/44 ,  H01M10/0567 ,  H01M4/02

Abstract: A battery assembly disclosed herein is a battery assembly before being subjected to initial charge. In the battery assembly, a positive electrode has a positive electrode mixture layer that contains a positive electrode active material and NMP, and an oxalate complex compound and FSO3Li are contained in a nonaqueous electrolyte solution. In the battery assembly disclosed herein, a NMP content in the positive electrode mixture layer is 50 ppm to 1500 ppm, the DBP oil absorption of the positive electrode active material is 30 ml/100 g to 45 ml/100 g, and a FSO3Li content in the nonaqueous electrolyte solution is 0.1 wt % to 1.0 wt %. With this, it is possible to prevent a reduction in input-output characteristics caused by formation of a film derived from NMP on the surface of the positive electrode active material, and hence it is possible to prevent an increase in facility cost and a reduction in manufacturing efficiency caused by adjustment of the content of NMP.

公开(公告)号：US20170025715A1

公开(公告)日：2017-01-26

申请号：US15124849

申请日：2015-03-05

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideyuki SAKA ,  Keiichi TAKAHASHI ,  Hideaki FUJITA

IPC: H01M10/42 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/505 ,  H01M2/34 ,  H01M10/0567

CPC classification number: H01M10/4235 ,  C01G53/50 ,  C01P2002/50 ,  C01P2002/52 ,  H01M2/345 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2200/20

Abstract: A nonaqueous electrolyte secondary battery according to the present invention includes: an electrode body including a positive electrode including a positive-electrode active material layer; an external terminal connected to the electrode body; a nonaqueous electrolyte including a gas generant, and a current interrupt device. A content of the gas generant is at least 4 mass %. The positive-electrode active material layer includes, as a positive-electrode active material, a complex oxide containing' at least zirconium (Zr) and calcium (Ca) as constituent elements. When a sum total of metal elements, except metal that becomes a charge carrier, in the complex oxide is 100 mol % in terms of a mole percentage, the complex oxide contains Zr from 0.1 mol % to 0.5 mol % inclusive and Ca from 0.1 mol % to 0.3 mol % inclusive.

Abstract translation: 根据本发明的非水电解质二次电池包括：电极体，包括具有正极活性物质层的正极; 连接到电极体的外部端子; 包含气体发生剂的非水电解质和电流中断装置。 气体发生剂的含量为4质量％以上。 正极活性物质层包含作为正极活性物质的含有至少锆（Zr）和钙（Ca）作为构成元素的复合氧化物。 当复合氧化物中除成为电荷载体的金属以外的金属元素的总和为100摩尔％时，复合氧化物含有0.1摩尔％〜0.5摩尔％的含有Zr的Zr和0.1摩尔的Ca ％〜0.3摩尔％。

公开(公告)号：US20150349329A1

公开(公告)日：2015-12-03

申请号：US14692844

申请日：2015-04-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideyuki SAKA ,  Hideaki FUJITA ,  Keiichi TAKAHASHI ,  Hideki SANO ,  Tatsuya HASHIMOTO

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/131 ,  H01M4/1391

CPC classification number: H01M4/364 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2004/028

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode composite material layer containing first positive electrode active material particles containing a lithium nickel composite oxide, second positive electrode active material particles containing lithium iron phosphate, and a conductive material. A ratio of the second positive electrode active material particles in a total mass of the first positive electrode active material particles and the second positive electrode active material particles is not lower than 5 mass % and not higher than 20 mass %. A standard deviation σ representing distribution of an iron element satisfies a condition of 0.28≦σ≦0.52 when distribution of the iron element is determined by conducting area analysis with an electron probe microanalyzer in a cross-section of the positive electrode composite material layer.

Abstract translation: 非水电解质二次电池包括含有含有锂镍复合氧化物的第一正极活性物质粒子和含有磷酸铁锂的第二正极活性物质粒子和导电性物质的正极复合材料层。 第一正极活性物质粒子和第二正极活性物质粒子的总质量的比例为5质量％以上且20质量％以下。 标准偏差 当正电极复合材料层的截面中通过用电子探针微量分析仪进行面积分析来确定铁元素的分布时，表示铁元素的分布满足条件0.28＆nlE;＆sgr;＆nlE; 0.52。

公开(公告)号：US20170373352A1

公开(公告)日：2017-12-28

申请号：US15622481

申请日：2017-06-14

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideyuki SAKA ,  Yukihiro OKADA ,  Keiichi TAKAHASHI ,  Kaoru INOUE

IPC: H01M10/42 ,  H01M2/34 ,  H01M4/36 ,  H01M10/0525 ,  H01M2/10 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0587

CPC classification number: H01M10/4235 ,  H01M2/1077 ,  H01M2/345 ,  H01M4/364 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2200/20 ,  H01M2220/20

Abstract: Provided is a lithium ion secondary battery which has a low internal resistance in a low-SOC region and a sufficiently large amount of gas generated during overcharge. The lithium ion secondary battery disclosed herein includes an electrode body having a positive electrode and a negative electrode, and a nonaqueous electrolytic solution. The lithium ion secondary battery further includes a pressure-type safety mechanism. The nonaqueous electrolytic solution includes a gas generating agent. The positive electrode has a positive electrode active material layer including a positive electrode active material. The positive electrode active material includes a lithium transition metal composite oxide represented by LiNiaCobMncO2 wherein a, b and c satisfy the following conditions: 0.35≦a≦0.45, 0.15≦b≦0.25, 0.35≦c≦0.45, and a+b+c=1, and a lithium transition metal composite oxide represented by LiNixCoyMnzO2 wherein x, y and z satisfy the following conditions: 0.35≦x≦0.45, 0.45≦y≦0.55, 0.05≦z≦0.15, and x+y+z=1, and the mass ratio of the oxides is 60:40 to 85:15.

公开(公告)号：US20170256776A1

公开(公告)日：2017-09-07

申请号：US15508765

申请日：2015-09-02

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideyuki SAKA ,  Keiichi TAKAHASHI ,  Hideaki FUJITA ,  Tatsuya HASHIMOTO

IPC: H01M2/34 ,  H01M4/36 ,  H01M10/052 ,  H01M4/525 ,  H01M4/58 ,  H01M4/131 ,  H01M4/505

CPC classification number: H01M2/345 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/364 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/052 ,  H01M10/4235 ,  H01M2004/028 ,  H01M2200/20

Abstract: A positive electrode mixture layer (12) includes a first layer (12a) that has a main surface MS and a second layer (12b) formed closer to the positive electrode current collector (11) side than the first layer (12a). A ratio of the volume of the first layer (12a) to the volume of the positive electrode mixture layer (12) is 20 to 75 vol %. The first layer (12a) contains lithium iron phosphate (LFP) (1) and lithium nickel cobalt manganese composite oxide (NCM) (2). A ratio of the mass of the LFP (1) to the total mass of the LFP (1) and the NCM (2) in the first layer (12a) is more than 0 and 80 mass % or less. The second layer (12b) contains NCM (2). A ratio of the mass of the LFP (1) to the total mass of the positive electrode active material in the positive electrode mixture layer (12) is 7.5 to 20 mass %. A maximum pore size of the first layer (12a) is 0.50 to 0.70 μm.

公开(公告)号：US20150194664A1

公开(公告)日：2015-07-09

申请号：US14589414

申请日：2015-01-05

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideyuki SAKA ,  Hideaki FUJITA ,  Keiichi TAKAHASHI

IPC: H01M4/136 ,  H01M4/13 ,  H01M10/0525 ,  H01M4/62

CPC classification number: H01M4/136 ,  H01M4/131 ,  H01M4/362 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0587

Abstract: Provided is a non-aqueous electrolyte secondary battery which exhibits excellent energy density and excellent input/output density (and especially output density in low SOC regions). This invention discloses a non-aqueous electrolyte secondary battery that includes a positive electrode, a negative electrode and a non-aqueous electrolyte. The positive electrode includes a positive electrode current collector and a positive electrode active material layers formed on the positive electrode current collector. The positive electrode active material layer has two regions that are demarcated in a surface direction of the positive electrode current collector, which are a first region 14a containing mainly a positive active material of lithium iron phosphate, and a second region 14b containing mainly a positive active material of a lithium-transition metal composite oxide.

Abstract translation: 提供一种非水电解质二次电池，其表现出优异的能量密度和优异的输入/输出密度（特别是在低SOC区域中的输出密度）。 本发明公开了一种非水电解质二次电池，其包括正极，负极和非水电解质。 正极包括在正极集电体上形成的正极集电体和正极活性物质层。 正极活性物质层具有在正极集电体的表面方向上划分的两个区域，它们是主要含有磷酸铁锂的正极活性物质的第一区域14a和主要含有正极活性物质的第二区域14b 锂 - 过渡金属复合氧化物的材料。

公开(公告)号：US20170162866A1

公开(公告)日：2017-06-08

申请号：US15324356

申请日：2015-06-02

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideyuki SAKA ,  Keiichi TAKAHASHI ,  Hideaki FUJITA ,  Tatsuya HASHIMOTO

IPC: H01M4/36 ,  H01M10/0587 ,  H01M10/04 ,  H01M4/136 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  H01M10/0525 ,  H01M4/58

CPC classification number: H01M4/364 ,  H01M4/131 ,  H01M4/136 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/0413 ,  H01M10/0431 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2220/20 ,  Y02E60/122

Abstract: A non-aqueous secondary battery includes a positive electrode composite material layer. In a cross-section in a direction of thickness of the positive electrode composite material layer, the positive electrode composite material layer includes a first region including one end portion in a direction intersecting with the direction of thickness, a second region including the other end portion, and a third region lying between the first region and the second region. The first region is composed of a first composite material containing lithium iron phosphate and lithium nickel cobalt manganese composite oxide, and the second region is composed of a second composite material containing lithium iron phosphate and lithium nickel cobalt manganese composite oxide. The third region is composed of a third composite material containing lithium nickel cobalt manganese composite oxide.

公开(公告)号：US20170047569A1

公开(公告)日：2017-02-16

申请号：US15304654

申请日：2015-04-15

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideyuki SAKA ,  Tatsuya HASHIMOTO ,  Yusuke FUKUMOTO ,  Keisuke OHARA ,  Kouichi TORIYAMA

IPC: H01M2/16 ,  H01M2/34 ,  H01M10/42 ,  H01M10/0525 ,  H01M10/0587

Abstract: A nonaqueous electrolyte secondary battery (100) includes a positive electrode (30), a negative electrode (40), a separator (50), a nonaqueous electrolytic solution, and a battery case (10). The positive electrode includes a positive electrode current collector (32) and a positive electrode active material layer (34). The separator includes a separator substrate (52) and a heat resistance layer (54). The separator substrate has an opposite surface opposite the positive electrode active material layer. The heat resistance layer constitutes at least a part of the opposite surface and contains a heat-resistant filler and a binder. The positive electrode active material layer has an adjacent region (X). The heat resistance layer has an opposite region (Y) opposite at least an end portion of the adjacent region. The end portion of the adjacent region is adjacent to a positive electrode current collector exposure portion (33). The opposite region contains at least a calcium salt of carboxymethyl cellulose.

Abstract translation: 非水电解质二次电池（100）包括正极（30），负极（40），隔膜（50），非水电解液和电池壳体（10）。 正极包括正极集电体（32）和正极活性物质层（34）。 隔板包括隔板基板（52）和耐热层（54）。 隔膜基板具有与正极活性物质层相反的相对面。 耐热层构成相对表面的至少一部分并且包含耐热填料和粘合剂。 正极活性物质层具有相邻区域（X）。 耐热层具有至少相邻区域的端部相对的相对区域（Y）。 相邻区域的端部与正极集电体曝光部分33相邻。 相对区域至少含有羧甲基纤维素的钙盐。