公开(公告)号：US20060199294A1

公开(公告)日：2006-09-07

申请号：US11363189

申请日：2006-02-28

申请人： Masato Fujikawa ,  Hajime Nishino ,  Mikinari Shimada

发明人： Masato Fujikawa ,  Hajime Nishino ,  Mikinari Shimada

IPC分类号： H01L21/00

CPC分类号： H01M10/058 ,  H01M2/16 ,  H01M2/1686 ,  H01M2/18 ,  H01M4/13 ,  H01M4/131 ,  H01M4/133 ,  H01M10/0525 ,  H01M10/44

摘要： Disclosed is a lithium ion secondary battery wherein an active material layer of at least one of positive and negative electrodes, or a separator carries a porous insulating layer, and the surface of the active material layer or separator carrying the porous insulating layer has a first region in which the porous insulating layer is formed and a second region including plural discontinuous deficient hole portions where the porous insulating layer is not formed. When a given reference deficient hole portion is selected from the plural deficient hole portions and a given circle having an area ten times that of the reference deficient hole portion is set on the surface of the active material layer or separator, the area of a part of the second region surrounded by the circle is controlled to not less than 10 μm2 and not more than 100 mm2.

摘要翻译： 公开了一种锂离子二次电池，其中正极和负极中的至少一个的活性材料层或隔板承载多孔绝缘层，并且承载多孔绝缘层的活性材料层或隔板的表面具有第一区域 其中形成多孔绝缘层，以及包括多个不连续缺陷孔部分的第二区域，其中未形成多孔绝缘层。 当从多个缺陷孔部分选择给定的参考缺陷孔部分并且将具有参考缺陷孔部分的面积的十倍的给定圆圈设置在活性物质层或分离器的表面上时， 由圆圈包围的第二区域被控制为不小于10um 2和不大于100mm 2。

公开(公告)号：US20060141341A1

公开(公告)日：2006-06-29

申请号：US11315189

申请日：2005-12-23

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

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

IPC分类号： H01M10/50 ,  H01M4/48 ,  H01M4/52 ,  H01M4/50

CPC分类号： H01M4/131 ,  H01M2/1653 ,  H01M4/505 ,  H01M4/525 ,  H01M10/4235

摘要： 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

摘要翻译： 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：US06627352B1

公开(公告)日：2003-09-30

申请号：US09051933

申请日：1998-04-22

申请人： Masaya Okochi ,  Masaki Kitagawa ,  Takashi Takeuchi ,  Hajime Nishino ,  Hizuru Koshina

发明人： Masaya Okochi ,  Masaki Kitagawa ,  Takashi Takeuchi ,  Hajime Nishino ,  Hizuru Koshina

IPC分类号： H01M458

CPC分类号： H01M4/583 ,  H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

摘要： The present invention relates to a lithium ion secondary battery using as the negative active material thereof a carbon material that enables the absorption and release of lithium ions and has volume resistivity not exceeding 5.0×10−3 ohmcm, thereby preventing battery temperatures from increasing abruptly due to low volume resistivity of the carbon material even when short-circuiting takes place inside of the battery.

摘要翻译： 本发明涉及一种锂离子二次电池，其使用能够吸收和释放锂离子并且体积电阻率不超过5.0×10 -3 ohm cm的碳材料作为其负极活性材料，从而防止电池温度突然增加 由于碳材料的体积电阻率低，即使在电池内发生短路时也是如此。