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公开(公告)号：US11600883B2
公开(公告)日：2023-03-07
申请号：US17179979
申请日：2021-02-19
发明人： Ryota Tajima , Kazuhei Narita , Kensuke Yoshizumi
IPC分类号： H01M50/209 , H01M50/50 , H01M50/116 , H01M50/531 , H01M50/543 , H01M50/178
摘要： A battery module with high impact resistance is provided. A battery module using an elastic body such as rubber for its exterior body covering a battery is provided. A bendable battery module is provided. As the exterior body covering a battery, an elastic body such as rubber is used, and the exterior body is molded in two steps. First, a first portion provided with a depression in which a battery is stored is molded using a first mold. Next, a battery is inserted into the first portion. Subsequently, second molding is performed using a second mold so as to fill an opening of the depression in the first portion, so that a second portion is formed. The second portion serves as a cover for closing the opening of the depression in the first portion. The second portion is formed in contact with part of the electrodes in the battery and part of an end portion of the second exterior body in the battery.
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公开(公告)号：US11444311B2
公开(公告)日：2022-09-13
申请号：US16925617
申请日：2020-07-10
发明人： Minoru Takahashi , Ryota Tajima
IPC分类号： H01M10/04 , H01M50/116 , H01M50/124 , H01M50/105 , H01G9/048 , H01G9/145 , H01G11/78
摘要： A secondary battery suitable for a portable information terminal or a wearable device is provided. An electronic device having a novel structure which can have various forms and a secondary battery that fits the forms of the electronic device are provided. In the secondary battery, scaling is performed using a film provided with depressions or projections that ease stress on the film due to application of external force. A pattern of depressions or projections is formed on the film by pressing, e.g., embossing.
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公开(公告)号：US11101492B2
公开(公告)日：2021-08-24
申请号：US16787105
申请日：2020-02-11
发明人： Minoru Takahashi , Ryota Tajima , Takuya Miwa , Yuugo Goto
IPC分类号： H01M10/04 , H01M50/463 , H01M10/42 , H01M50/10
摘要： In the case where a film, which has lower strength than a metal can, is used as an exterior body of a secondary battery, a current collector provided in a region surrounded by the exterior body, an active material layer provided on a surface of the current collector, or the like might be damaged when force is externally applied to the secondary battery. A secondary battery that is durable even when force is externally applied thereto is provided. A cushioning material is provided in a region surrounded by an exterior body of a secondary battery. Specifically, a cushioning material is provided on the periphery of a current collector such that a sealing portion of an exterior body (film) is located outside the cushioning material.
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公开(公告)号：US11038207B2
公开(公告)日：2021-06-15
申请号：US16462420
申请日：2017-11-22
发明人： Kazuhei Narita , Ryota Tajima
IPC分类号： H01M10/0569 , H01G11/52 , H01G11/60 , H01G11/62 , H01G11/68 , H01G11/78 , H01M4/66 , H01M10/052 , H01M10/0568 , H01M50/44 , H01M50/116 , H01M50/209 , H01M50/431 , H01M50/543 , H01M50/557 , H01M50/429
摘要： Provided is a power storage device whose charging and discharging characteristics are unlikely to be degraded by heat treatment or a power storage device that is highly safe against heat treatment. The power storage device includes a positive electrode, a negative electrode, a separator, an electrolyte, and an exterior body. The separator is positioned between the positive electrode and the negative electrode and includes polyphenylene sulfide or cellulosic fiber. The electrolyte includes propylene carbonate, ethylene carbonate, and vinylene carbonate, lithium hexafluorophosphate, and lithium bis(pentafluoroethanesulfonyl)amide. A concentration of lithium hexafluorophosphate with respect to the electrolyte is more than or equal to 0.01 wt % and less than or equal to 1.9 wt % in a weight ratio.
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公开(公告)号：US10937999B2
公开(公告)日：2021-03-02
申请号：US14948681
申请日：2015-11-23
发明人： Minoru Takahashi , Junpei Momo , Ryota Tajima
IPC分类号： H01M2/02 , H01M10/04 , H01M10/48 , H01M10/42 , H01M10/052 , H01M10/0585
摘要： In the case where a secondary battery is repetitively curved, portions which tend to cause deterioration such as crack or breakage are, for example, a positive electrode tab and a negative electrode tab. This is because these portions are narrow projected portions, and tend to have low mechanical strength against repetitive curving in some cases. In view of the above, the positive electrode tab and the negative electrode tab are provided in portions relatively less affected by curving. More specifically, secondary battery includes a positive electrode, a positive electrode lead electrically connected to the positive electrode, a negative electrode, a negative electrode lead electrically connected to the negative electrode, a separator, and an exterior body wrapping the positive electrode, the negative electrode, and the separator. The positive electrode, the separator, the negative electrode, and the exterior body can be curved in a first direction. The positive electrode lead and the negative electrode lead are drawn from opposite sides of the exterior body.
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公开(公告)号：US10756311B2
公开(公告)日：2020-08-25
申请号：US15145007
申请日：2016-05-03
发明人： Ryota Tajima
摘要： A secondary battery with high capacity per unit volume can be provided. A flexible secondary battery with a novel structure can be provided. A secondary battery that can be bent repeatedly can be provided. A highly reliable secondary battery can be provided. A long-life secondary battery can be provided. A secondary battery comprises an inner structure and an exterior body that surrounds the inner structure. The inner structure comprises a positive electrode and a negative electrode. The exterior body comprises a first exterior film and a second exterior film. A region comprising reduced graphene oxide lies between the first exterior film and the second exterior film. The graphene oxide preferably comprises a region where the concentration of oxygen is higher than or equal to 2 atomic percent and lower than or equal to 20 atomic percent.
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7.发明授权公开(公告)号：US10483044B2
公开(公告)日：2019-11-19
申请号：US15685726
申请日：2017-08-24
发明人： Nobuhiro Inoue , Ryota Tajima , Tamae Moriwaka , Junpei Momo , Teppei Oguni , Kai Kimura , Kazutaka Kuriki , Shunpei Yamazaki
IPC分类号： H01M4/36 , H01G9/042 , H01M4/02 , H01M4/133 , H01M4/134 , H01G11/06 , H01G11/26 , H01G11/50 , H01M10/0525
摘要： To improve the reliability of a power storage device. A granular active material including carbon is used, and a net-like structure is formed on part of a surface of the granular active material. In the net-like structure, a carbon atom included in the granular active material is bonded to a silicon atom or a metal atom through an oxygen atom. Formation of the net-like structure suppresses reductive decomposition of an electrolyte solution, leading to a reduction in irreversible capacity. A power storage device using the above active material has high cycle performance and high reliability.
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8.发明授权公开(公告)号：US09754728B2
公开(公告)日：2017-09-05
申请号：US14032214
申请日：2013-09-20
发明人： Nobuhiro Inoue , Ryota Tajima , Tamae Moriwaka , Junpei Momo , Teppei Oguni , Kai Kimura , Kazutaka Kuriki , Shunpei Yamazaki
IPC分类号： H01M4/133 , H01G9/042 , H01M4/36 , H01M4/02 , H01M4/134 , H01G11/06 , H01G11/26 , H01G11/50 , H01M10/0525
CPC分类号： H01G9/042 , H01G11/06 , H01G11/26 , H01G11/50 , H01M4/02 , H01M4/133 , H01M4/134 , H01M4/366 , H01M10/0525 , Y02E60/122 , Y02E60/13
摘要： To improve the reliability of a power storage device. A granular active material including carbon is used, and a net-like structure is formed on part of a surface of the granular active material. In the net-like structure, a carbon atom included in the granular active material is bonded to a silicon atom or a metal atom through an oxygen atom. Formation of the net-like structure suppresses reductive decomposition of an electrolyte solution, leading to a reduction in irreversible capacity. A power storage device using the above active material has high cycle performance and high reliability.
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公开(公告)号：US20140023920A1
公开(公告)日：2014-01-23
申请号：US13940287
申请日：2013-07-12
发明人： Shunpei YAMAZAKI , Teppei Oguni , Tamae Moriwaka , Junpei Momo , Ryota Tajima , Nobuhiro Inoue
IPC分类号： H01M4/133
摘要： A secondary battery in which graphite that is an active material can occlude and release lithium efficiently is provided. Further, a highly reliable secondary battery in which the amount of lithium inserted and extracted into/from graphite that is an active material is prevented from varying is provided. The secondary battery includes a negative electrode including a current collector and graphite provided over the current collector, and a positive electrode. The graphite includes a plurality of graphene layers. Surfaces of the plurality of graphene layers are provided substantially along the direction of an electric field generated between the positive electrode and the negative electrode.
摘要翻译： 提供了作为活性物质的石墨能够有效地吸留和释放锂的二次电池。 此外，提供了一种高可靠性的二次电池，其中防止插入和从石墨中提取的作为活性材料的锂的量变化。 二次电池包括设置在集电体上方的集电体和石墨的负极和正极。 石墨包括多个石墨烯层。 基本上沿着在正极和负极之间产生的电场的方向设置多个石墨烯层的表面。
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公开(公告)号：US20130164611A1
公开(公告)日：2013-06-27
申请号：US13717750
申请日：2012-12-18
发明人： Kenryo NANBA , Minoru Takahashi , Ryota Tajima , Teppei Oguni , Junpei Momo
IPC分类号： H01M4/70
摘要： Disclosed is a power storage device including a negative electrode and a positive electrode. The negative electrode includes a negative electrode current collector including a common portion and a plurality of protrusions protruding from the common portion, and a negative electrode active material layer which covers a side surface of the protrusion. The positive electrode faces the negative electrode with an electrolyte provided therebetween. In the plurality of protrusions, a distance between adjacent protrusions is a distance with which adjacent negative electrode active material layers are in contact with each other before the capacity of the negative electrode active material layer reaches the theoretical capacity of the negative electrode active material layer by insertion of carrier ions from the positive electrode.
摘要翻译： 公开了一种包括负极和正极的蓄电装置。 负极包括负极集电体，该负极集电体包括公共部分和从公共部分突出的多个突起;以及负极活性物质层，其覆盖突起的侧面。 正电极面对负极，其间设置有电解质。 在多个突起中，相邻的突起之间的距离是在负极活性物质层的电容达到负极活性物质层的理论容量之前，相邻的负极活性物质层彼此接触的距离， 从正极插入载体离子。
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