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公开(公告)号：US20240088345A1
公开(公告)日：2024-03-14
申请号：US18172292
申请日：2023-02-21
CPC分类号： H01M4/0435 , H01M10/0404
摘要： In a manufacturing method of an electrode structure of an embodiment, in a belt-like member in which an uncoated region not coated with an active material-containing layer is formed in one of a pair of long edges and its vicinity in a current collector, the active material-containing layer is rolled, and a tension in a longitudinal direction is applied to the belt-like member between a pulling unit pulling the belt-like member and a rolling unit rolling the active material-containing layer. In the method, between the rolling unit and the pulling unit, a pair of holding members are brought into contact with the uncoated region from opposite sides in a thickness direction of the belt-like member to which the tension is applied, thereby holding the uncoated region between the holding members.
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公开(公告)号：US20210083297A1
公开(公告)日：2021-03-18
申请号：US16804546
申请日：2020-02-28
发明人： Yuta KANAI , Tetsuya SASAKAWA , Keigo HOSHINA , Yasuhiro HARADA , Norio TAKAMI
摘要： According to one embodiment, an electrode is provided. The electrode includes the active material-containing layer formed on the current collector and including active material particles. The particle size distribution chart obtained by the laser diffraction scattering method for the active material particles includes the first region and the second region. The first particle group included in the first region includes the first active material particles, and the second particle group included in the second region includes second active material particles. The carbon coverage of the first particle group is higher than the carbon coverage of the second particle group.
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公开(公告)号：US20240110300A1
公开(公告)日：2024-04-04
申请号：US18461657
申请日：2023-09-06
发明人： Norihiro YOSHINAGA , Yoshihiko NAKANO , Taishi FUKAZAWA , Yuta KANAI , Yoshitsune SUGANO , Akihiko ONO
IPC分类号： C25B11/069 , C25B1/02 , C25B9/19 , C25B11/032 , C25B11/052
CPC分类号： C25B11/069 , C25B1/02 , C25B9/19 , C25B11/032 , C25B11/052
摘要： An electrode according to an embodiment includes a support, an intermediate layer including carbon particles and resin on the support, and a catalyst layer on the intermediate layer. A thickness of the intermediate layer is 70 [μm] or more and 300 [μm] or less.
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4.发明公开公开(公告)号：US20230400526A1
公开(公告)日：2023-12-14
申请号：US18451330
申请日：2023-08-17
发明人： Yuta KANAI , Ryosuke YAGI , Wataru UNO , Norihiro YOSHINAGA
IPC分类号： G01R31/389 , H02J7/00
CPC分类号： G01R31/389 , H02J7/0047
摘要： In a diagnosis method of an embodiment, a battery, which includes, as electrode active materials, a first electrode active material whose impedance has a first natural frequency and a second natural frequency lower than the first natural frequency and a second electrode active material whose impedance has a third natural frequency with a magnitude between the first natural frequency and the second natural frequency, is diagnosed. In the method, an impedance of the battery is measured at each of a plurality of measurement target frequencies by setting, as a measurement range, a first measurement range including the first natural frequency and not including the second and third natural frequencies, and a second measurement range including the second natural frequency and not including the first and third natural frequencies.
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公开(公告)号：US20220344655A1
公开(公告)日：2022-10-27
申请号：US17668475
申请日：2022-02-10
发明人： Arisa YAMADA , Tomoe KUSAMA , Tomoko SUGIZAKI , Yuta KANAI , Hirofumi YASUMIISHI , Tetsuya SASAKAWA , Yasuhiro HARADA
IPC分类号： H01M4/525 , H01M10/0525 , H01M4/131 , H01M4/1391 , H01M4/134 , H01M4/1395 , H01M4/04
摘要： According to one embodiment, a method of producing a secondary battery is provided. The method includes preparing a battery architecture including a positive electrode, a negative electrode, and an electrolyte; adjusting a positive electrode potential to a range of 3.4 V to 3.9 V and a negative electrode potential to a range of 1.5 V to 2.0 V based on an oxidation-reduction potential of lithium, thereby providing a potential adjusted state; and holding the battery architecture in the potential adjusted state at a holding temperature of 50° C. to 90° C. The positive electrode includes a lithium-nickel-cobalt-manganese composite oxide. The negative electrode includes a niobium-titanium composite oxide. The electrolyte includes one or more first organic solvent having a viscosity of 1 cP or less.
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公开(公告)号：US20240097098A1
公开(公告)日：2024-03-21
申请号：US18176136
申请日：2023-02-28
CPC分类号： H01M4/0435 , H01M4/661 , H01M4/667
摘要： In a manufacturing method of an electrode structure of an embodiment, in a belt-like member in which an uncoated region not coated with an active material-containing layer is formed in one of long edges and its vicinity in a current collector, the active material-containing layer is rolled, and a tension in a longitudinal direction is applied to the belt-like member between a pulling unit pulling the belt-like member and a rolling unit rolling the active material-containing layer. In the method, the uncoated region is pushed by a projection projecting to an outer peripheral side in a roller between the rolling unit and the pulling unit, thereby enlarging the uncoated region in the longitudinal direction. A projection length of the projection to the projection end is larger than the thickness of the rolled active material-containing layer.
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7.发明公开公开(公告)号：US20240006905A1
公开(公告)日：2024-01-04
申请号：US18166607
申请日：2023-02-09
发明人： Yuta KANAI , Ryosuke YAGI , Wataru UNO
IPC分类号： H02J7/00 , G01R31/389 , G01R31/392
CPC分类号： H02J7/00712 , G01R31/389 , H02J7/005 , G01R31/392
摘要： In a charging method of a battery of an embodiment, at each of a first time point and a second time point after a time point at which a predetermined time is elapsed from the first time point, a superimposed current obtained by superimposing a current waveform that periodically changes at a predetermined frequency on a charging current is input to the battery, thereby measuring, concerning an impedance of the battery at the predetermined frequency, a first impedance at the first time point and a second impedance at the second time point. In the charging method, using a parameter representing an increase state of the second impedance to the first impedance as an index, a current value of the charging current is adjusted.
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公开(公告)号：US20230366939A1
公开(公告)日：2023-11-16
申请号：US18359929
申请日：2023-07-27
发明人： Wataru UNO , Yuta KANAI , Ryosuke YAGI
IPC分类号： G01R31/367 , H01M10/42 , G01R31/36 , G01R31/389 , G01R31/3842
CPC分类号： G01R31/367 , H01M10/425 , G01R31/3648 , G01R31/389 , G01R31/3842 , H01M2010/4271
摘要： In an embodiment, a diagnosis method of a secondary battery, which includes a first electrode including a first electrode active material that performs a two-phase coexistence reaction, and a second electrode including a second active material that performs a single-phase reaction and having a polarity opposite to a polarity of the first electrode, is provided. In the method, a relationship between an SOC of the secondary battery and at least one of a charge transfer resistance and a vertex frequency of the second electrode is acquired by calculating at least one of the charge transfer resistance and the vertex frequency of the second electrode based on a measurement result of an impedance of the secondary battery for each of a plurality of SOC values of the secondary battery.
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公开(公告)号：US20220085638A1
公开(公告)日：2022-03-17
申请号：US17186054
申请日：2021-02-26
发明人： Tomoko SUGIZAKI , Tomoe KUSAMA , Yuta KANAI , Keigo HOSHINA , Tetsuya SASAKAWA , Ryosuke YAGI , Yasuhiro HARADA , Norio TAKAMI
摘要： According to one embodiment, a storage battery includes one or more first batteries that include a first active material as a negative electrode active material, and one or more second batteries that include a second active material having an operation electric potential lower than that of the first active material as a negative electrode active material. Charge and the discharge of the second batteries are stopped based on a fact that a temperature of the storage battery is lower than a temperature threshold. The second batteries are caused to charge or discharge based on a fact that the temperature of the storage battery is equal to or higher than the temperature threshold.
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公开(公告)号：US20230197931A1
公开(公告)日：2023-06-22
申请号：US17822605
申请日：2022-08-26
发明人： Yuta KANAI , Tetsuya SASAKAWA , Kazuomi YOSHIMA , Tomoko SUGIZAKI , Yasunobu YAMASHITA , Kazuki ISE , Taro FUKAYA , Norio TAKAMI , Yasuhiro HARADA , Keigo HOSHINA
IPC分类号： H01M4/36 , H01M10/0525 , H01M10/42 , H01M4/48
CPC分类号： H01M4/364 , H01M10/0525 , H01M10/425 , H01M4/483 , H01M2220/20 , H01M2004/027
摘要： According to one embodiment, a secondary battery including a negative electrode. The negative electrode includes a negative electrode current collector and a negative electrode mixture layer. A thickness of the negative electrode current collector is in a range of 8 μm to 18 μm. The negative electrode current collector includes a first current collector end surface extending along a stacking direction. The negative electrode mixture layer includes a niobium-titanium composite oxide, and a first protrusion protruding from the first current collector end surface along a first direction orthogonal to the stacking direction. A protrusion length A1 of the first protrusion satisfies 0 mm
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