公开(公告)号：US20130017455A1

公开(公告)日：2013-01-17

申请号：US13637605

申请日：2011-03-10

Applicant: Masaki Deguchi ,  Shinji Kasamatsu

Inventor： Masaki Deguchi ,  Shinji Kasamatsu

IPC: H01M10/0569 ,  H01M10/0567

CPC classification number: H01M10/052 ,  H01M4/525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M2300/0025 ,  H01M2300/004

Abstract: Disclosed is a non-aqueous electrolyte including a non-aqueous solvent, and a solute dissolved in the non-aqueous solvent. The non-aqueous solvent contains ethylene carbonate (EC), propylene carbonate (PC), diethyl carbonate (DEC), and an additive. The weight percentage WEC of EC the total weight of EC, PC, and DEC is more than 20 wt % and equal to or less than 35 wt %; the weight percentage WPC of PC is 20 to 40 wt %; and the weight percentage WDEC of DEC is 30 to 50 wt %. The additive contains a cyclic carbonate having a C═C unsaturated bond, and a sultone compound. The ratio WC/WSL of a weight percentage WC of the cyclic carbonate having a C═C unsaturated bond contained in the non-aqueous electrolyte, to a weight percentage WSL of the sultone compound contained in the non-aqueous electrolyte is 1 to 6.

Abstract translation: 公开了包含非水溶剂的非水电解质和溶解在非水溶剂中的溶质。 非水溶剂含有碳酸亚乙酯（EC），碳酸亚丙酯（PC），碳酸二乙酯（DEC）和添加剂。 EC，EC，PC和DEC的总重量的重量百分比WEC大于20重量％且等于或小于35重量％; PC的重量百分比WPC为20〜40重量％; DEC的重量百分比WDEC为30〜50重量％。 添加剂含有C = C不饱和键的环状碳酸酯和磺内酯化合物。 非水电解质中含有C = C不饱和键的环状碳酸酯的重量百分比WC与非水电解质中所含的磺内酯化合物的重量百分比WSL的比值为1〜6。

公开(公告)号：US20120064415A1

公开(公告)日：2012-03-15

申请号：US13320461

申请日：2011-03-09

Applicant: Taiki Satow ,  Shinji Kasamatsu ,  Nobuhiro Hirano ,  Masaya Ugaji

Inventor： Taiki Satow ,  Shinji Kasamatsu ,  Nobuhiro Hirano ,  Masaya Ugaji

IPC: H01M4/62 ,  H01M10/056 ,  H01M4/583

CPC classification number: H01M10/0569 ,  H01M4/133 ,  H01M4/622 ,  H01M10/0525

Abstract: A negative electrode for a lithium ion secondary battery includes a negative electrode core member and a negative electrode mixture layer adhering to the negative electrode core member. The negative electrode mixture layer includes active material particles, a cellulose ether compound, and rubber particles. The cellulose ether compound has a degree of etherification of 0.25 or more and 0.7 or less and an average degree of polymerization of 20 or more and 1200 or less. The negative electrode mixture layer contains remaining particles including a water-insoluble portion of the cellulose ether compound and having a mean particle size of 1 μm or more and 75 μm or less. The bonding strength between the active material particles is 98 N/cm2 or more.

Abstract translation: 锂离子二次电池用负极包括负极芯部件和附着在负极芯部件上的负极合剂层。 负极混合层包括活性物质颗粒，纤维素醚化合物和橡胶颗粒。 纤维素醚化合物的醚化度为0.25以上且0.7以下，平均聚合度为20以上且1200以下。 负极混合物层含有包含纤维素醚化合物的水不溶性部分，平均粒径为1μm以上且75μm以下的残留粒子。 活性物质粒子的结合强度为98N / cm 2以上。

公开(公告)号：US08017262B2

公开(公告)日：2011-09-13

申请号：US11339617

申请日：2006-01-26

Applicant: Masato Fujikawa ,  Shinji Kasamatsu ,  Hajime Nishino ,  Hideharu Takezawa ,  Mikinari Shimada

Inventor： Masato Fujikawa ,  Shinji Kasamatsu ,  Hajime Nishino ,  Hideharu Takezawa ,  Mikinari Shimada

IPC: H01M10/02 ,  H01M2/16

CPC classification number: H01M10/052 ,  H01M2/1653 ,  H01M2/166 ,  H01M2/1673 ,  H01M2/1686 ,  H01M4/525 ,  H01M10/4235 ,  Y02T10/7011

Abstract: A lithium secondary battery including: an electrode group, a non-aqueous electrolyte and a battery case housing the electrode group and the non-aqueous electrolyte, the electrode group including a positive electrode, a negative electrode and a separator layer interposed between the positive electrode and the negative electrode, wherein an end-of-charge voltage and an end-of-discharge voltage are set in such a manner that the electrode group has an energy density of not less than 700 Wh/L, the separator layer includes a porous heat-resistant layer, and a short circuit area A produced when an internal short circuit has occurred between the positive electrode and the negative electrode, and a reduced area B of the porous heat-resistant layer that is produced by heat generation satisfy 1≦(A+B)/A≦10.

Abstract translation: 一种锂二次电池，其包括：电极组，非水电解质和容纳所述电极组和所述非水电解质的电池壳体，所述电极组包括正极，负极和插入在所述正极之间的隔板层 和负极，其中以使得电极组的能量密度不低于700Wh / L的方式设定充电结束电压和放电终止电压，隔板层包括多孔 耐热层和在正极和负极之间发生内部短路时产生的短路面积A，通过发热产生的多孔耐热层的减少面积B满足1＆lt; nlE;（ A + B）/ A＆nlE; 10。

公开(公告)号：US20100209767A1

公开(公告)日：2010-08-19

申请号：US12597329

申请日：2008-04-22

Applicant: Shinji Kasamatsu ,  Mikinari Shimada ,  Masayuki Nagamine ,  Yasuo Fukase ,  Masatoshi Takahashi ,  Masato Iwanaga

Inventor： Shinji Kasamatsu ,  Mikinari Shimada ,  Masayuki Nagamine ,  Yasuo Fukase ,  Masatoshi Takahashi ,  Masato Iwanaga

IPC: H01M2/02 ,  H01M10/04 ,  G01N27/416

CPC classification number: H01M10/48 ,  H01M6/50 ,  H01M10/0587 ,  Y10T29/49108

Abstract: The invention provides a method for evaluating the safety of a battery under an internal short-circuit condition. The battery includes: an electrode group including a positive electrode, a negative electrode, and an insulating layer for electrically insulating the electrodes, which are wound or laminated; an electrolyte; a housing for housing the electrode group and the electrolyte; and a current-collecting terminal for electrically connecting the electrode group and the housing. The method of the invention includes: placing a foreign object at a location inside the electrode group of the battery where the positive electrode and the negative electrode face each other; and pressing the location by the pressure applied by a pressing tool to locally crush the insulating layer between the positive and negative electrodes, thereby causing an internal short-circuit. The contact area of the electrode group and the pressing tool during the pressing is larger than the area of a rectangle circumscribed about the foreign object. A short-circuit test is conducted at a given location inside the battery to comprehensively evaluate the safety of the battery under an internal short-circuit condition.

Abstract translation: 本发明提供一种用于在内部短路状态下评估电池的安全性的方法。 电池包括：包括正极，负极和用于电绝缘电极的绝缘层的电极组，其被卷绕或层压; 电解液 用于容纳电极组和电解质的壳体; 以及用于电连接电极组和壳体的集电端子。 本发明的方法包括：将异物放置在正极和负极彼此面对的电池的电极组内的位置; 并且通过由加压工具施加的压力来按压位置以局部地挤压正极和负极之间的绝缘层，从而导致内部短路。 电极组和按压工具在按压期间的接触面积大于围绕异物的矩形的面积。 在电池内的给定位置进行短路测试，以全面评估电池在内部短路条件下的安全性。

公开(公告)号：US20100136428A1

公开(公告)日：2010-06-03

申请号：US12596762

申请日：2008-11-19

Applicant: Tomohiko Yokoyama ,  Hideharu Takezawa ,  Masato Fujikawa ,  Shinji Kasamatsu

Inventor： Tomohiko Yokoyama ,  Hideharu Takezawa ,  Masato Fujikawa ,  Shinji Kasamatsu

IPC: H01M4/02

CPC classification number: H01M4/38 ,  H01M4/13 ,  H01M4/139 ,  H01M4/386 ,  H01M4/387 ,  H01M10/0431 ,  H01M10/0525 ,  H01M10/4235 ,  Y02E60/122

Abstract: The non-aqueous electrolyte secondary battery of the present invention is provided with an electrode plate group and a non-aqueous electrolyte, the electrode plate group including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, a positive electrode lead connected to the positive electrode, and a negative electrode lead connected to the negative electrode. The energy density of the electrode plate group is 750 Wh/L or higher by volume, and the cross-sectional area of at least one of the positive electrode lead and the negative electrode lead is 5.5×10−5 to 1.2×10−2 cm2.

Abstract translation: 本发明的非水电解质二次电池具有电极板组和非水电解质，所述电极板组包括正极，负极，夹在正极和负极之间的隔板， 与正极连接的正极引线和与负极连接的负极引线。 电极板组的能量密度为750Wh / L以上，正极引线和负极引线的至少一方的截面积为5.5×10 -5〜1.2×10 -2 cm2。

公开(公告)号：US07687202B2

公开(公告)日：2010-03-30

申请号：US11315189

申请日：2005-12-23

Applicant: Hajime Nishino ,  Shinji Kasamatsu ,  Hideharu Takezawa ,  Kazuhiro Okamura ,  Mikinari Shimada

Inventor： Hajime Nishino ,  Shinji Kasamatsu ,  Hideharu Takezawa ,  Kazuhiro Okamura ,  Mikinari Shimada

IPC: H01M4/58 ,  H01M2/16 ,  H01M6/04 ,  H10M4/62

CPC classification number: H01M4/131 ,  H01M2/1653 ,  H01M4/505 ,  H01M4/525 ,  H01M10/4235

Abstract: A non-aqueous electrolyte secondary battery including: a positive electrode having a positive electrode material mixture containing a composite lithium oxide; a negative electrode; a polyolefin separator; a non-aqueous electrolyte; and a heat-resistant insulating layer interposed between the positive and negative electrodes. The positive electrode active material mixture has an estimated heat generation rate at 200° C. of not greater than 50 W/kg. The estimated heat generation rate is determined by obtaining a relation between absolute temperature T and heat generation rate V of the positive electrode material mixture using an accelerating rate calorimeter; plotting a relation between the inverse of absolute temperature T and the logarithm of heat generation rate V according to the Arrhenius law; obtaining a straight line fitted to the plotted points in a heat generation temperature range of T

Abstract translation: 一种非水电解质二次电池，包括：具有含有复合氧化锂的正极合剂混合物的正极; 负极; 聚烯烃分离器; 非水电解质; 以及插入在正极和负极之间的耐热绝缘层。 正极活性物质混合物在200℃下的估计发热率不大于50W / kg。 通过使用加速率量热计获得正极材料混合物的绝对温度T和发热量V之间的关系来确定估计发热速率; 根据Arrhenius定律绘制绝对温度T的倒数与发热量V的对数之间的关系; 在T <200℃的发热温度范围内获得拟合到绘图点的直线; 并将直线外推至200℃的温度。

公开(公告)号：US20090104529A1

公开(公告)日：2009-04-23

申请号：US11916603

申请日：2006-07-21

Applicant: Hajime Nishino ,  Shuji Tsutsumi ,  Shinji Kasamatsu ,  Hideharu Takezawa ,  Mikinari Shimada

Inventor： Hajime Nishino ,  Shuji Tsutsumi ,  Shinji Kasamatsu ,  Hideharu Takezawa ,  Mikinari Shimada

IPC: H01M4/58

CPC classification number: H01M4/70 ,  H01M10/0525 ,  Y02E60/122 ,  Y02T10/7011

Abstract: An object of the present invention is to provide an electrode for a lithium ion secondary battery that can ensure a high level of safety even when exposed to severe conditions such as a nail penetration test or crush test, and exhibit excellent output characteristics.The present invention relates to an electrode for a lithium ion secondary battery having a material mixture containing active material particles capable of reversibly absorbing and desorbing lithium, and a current collector that carries the material mixture, wherein a surface of the current collector has recessed portions, and an area occupied by the recessed portions accounts for not less than 30% of an a material mixture carrying area of the current collector. The present invention further relates to an electrode for a lithium ion secondary battery wherein, in a cut surface obtained by simultaneously cutting a material mixture and a current collector vertically to an electrode plane, the maximum depth of recessed portions is not less than 1 μm, or a difference between an average thickness of a current collector and a maximum thickness of the current collector is not less than 0.35 μm.

Abstract translation: 本发明的目的是提供一种锂离子二次电池用电极，即使在暴露于诸如指甲穿透试验或粉碎试验等严酷条件下也能够确保高水平的安全性，并且显示出优异的输出特性。 本发明涉及一种锂离子二次电池用电极，其具有包含能够可逆地吸收和解吸锂的活性物质粒子的材料混合物，以及承载该材料混合物的集电体，其中集电体的表面具有凹部， 并且由凹部占据的面积占集电体的混合物承载面积的30％以上。 本发明还涉及一种锂离子二次电池用电极，其特征在于，在与电极平面垂直地同时切割材料混合物和集电体的切断面中，凹部的最大深度为1μm以上， 或者集电体的平均厚度与集电体的最大厚度的差为0.35μm以上。

公开(公告)号：US20090098451A1

公开(公告)日：2009-04-16

申请号：US12247666

申请日：2008-10-08

Applicant: Tomohiko Yokoyama ,  Masato Fujikawa ,  Hideharu Takezawa ,  Shinji Kasamatsu

Inventor： Tomohiko Yokoyama ,  Masato Fujikawa ,  Hideharu Takezawa ,  Shinji Kasamatsu

IPC: H01M4/02

CPC classification number: H01M10/0585 ,  H01M2/0227 ,  H01M4/134 ,  H01M4/70 ,  H01M10/0525 ,  H01M10/613 ,  H01M10/623 ,  H01M10/647 ,  H01M10/651 ,  H01M10/6553 ,  Y02T10/7011

Abstract: In a lithium ion secondary battery including a flat-plate electrode assembly which is configured by stacking the positive electrode, the separator, and the negative electrode in the thickness direction thereof, each of the positive electrode and the negative electrode includes a current collector and an active material layer. Each of the current collector includes a substantially rectangular current collector body, a heat radiating portion, and a lead portion, and the heat radiating portions are projected toward the outside of the electrode assembly so as not to overlap with each other in the thickness direction of the electrode assembly. In this way, heat caused inside the lithium ion secondary battery can be diffused efficiently to the outside, and safety of the lithium ion secondary battery can be further increased, without complicating the battery structure and decreasing mechanical strength of the battery.

Abstract translation: 在包括通过在其厚度方向堆叠正极，隔板和负极而构成的平板电极组件的锂离子二次电池中，正电极和负电极都包括集电体和 活性物质层。 每个集电器包括基本上矩形的集电体，散热部分和引线部分，并且散热部分朝向电极组件的外部突出，以便在电极组件的外侧不会在厚度方向上彼此重叠 电极组件。 以这种方式，锂离子二次电池内产生的热可以有效地扩散到外部，并且可以进一步提高锂离子二次电池的安全性，而不会使电池结构复杂化并且降低电池的机械强度。

公开(公告)号：US20080186030A1

公开(公告)日：2008-08-07

申请号：US12027126

申请日：2008-02-06

Applicant: Shinji Kasamatsu ,  Hajime Nishino ,  Masato Fujikawa ,  Mikinari Shimada

Inventor： Shinji Kasamatsu ,  Hajime Nishino ,  Masato Fujikawa ,  Mikinari Shimada

IPC: G01N27/416 ,  G01N25/00

CPC classification number: H01M10/44 ,  H01M2/34 ,  H01M4/131 ,  H01M4/133 ,  H01M10/0525 ,  H01M10/486 ,  H01M2200/00

Abstract: An evaluation method for evaluating safety of a battery having an electrode group including a positive electrode plate, a negative electrode plate and a separator inserted between said electrode plates. The method includes the steps of charging the battery to a predetermined voltage; incorporating conductive foreign matter into the charged battery such that the conductive foreign matter is in contact with the positive electrode plate, and not in contact with the negative electrode plate; immersing said battery into which the conductive foreign matter has been incorporated in an electrolyte to dissolve and deposit the conductive foreign matter, thereby causing an internal short circuit to occur in the battery; and evaluating a thermal behavior of the battery in which the internal short circuit has occurred, and outputting results of the evaluation as safety indices.

Abstract translation: 一种用于评估具有包括插入在所述电极板之间的正极板，负极板和隔板的电极组的电池的安全性的评估方法。 该方法包括以下步骤：将电池充电至预定电压; 将导电异物掺入带电电池中，使得导电异物与正极板接触，而不与负极板接触; 将其中已经将导电异物掺入其中的所述电池浸入电解质中以溶解和沉积导电异物，从而在电池中发生内部短路; 并评估发生内部短路的电池的热性能，并输出评价结果作为安全指标。

公开(公告)号：US07336081B2

公开(公告)日：2008-02-26

申请号：US11098378

申请日：2005-04-05

Applicant: Shinji Kasamatsu ,  Hajime Nishino ,  Mikinari Shimada

Inventor： Shinji Kasamatsu ,  Hajime Nishino ,  Mikinari Shimada

IPC: G01N27/416

CPC classification number: G01R31/3679 ,  H01M10/0525 ,  H01M10/4285

Abstract: A cell evaluation device has a short circuit detection portion to detect an internal short circuit within a test cell that has been subjected to nail penetration or crushing using the pressure from a pressurization portion, a pressure control portion to halt the operation of the pressurization portion on detection of a short circuit, and a cell information detection portion to collect and record cell information such as the cell temperature. By using such a cell evaluation device, the location of an internal short circuit during an abuse test is specified, and variations in the cell temperature increase accompanying the internal short circuit is minimized.

Abstract translation: 电池评估装置具有短路检测部，用于检测使用来自加压部的压力进行指甲穿透或破碎的测试电池内的内部短路，压力控制部分停止加压部分的操作 检测短路，以及小区信息检测部分，用于收集和记录诸如小区温度的小区信息。 通过使用这样的电池评价装置，规定了在滥用试验期间的内部短路的位置，并且使伴随内部短路的电池温度升高的变化被最小化。