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公开(公告)号：US20250038274A1
公开(公告)日：2025-01-30
申请号：US18720101
申请日：2022-11-28
Inventor： Kaoru Inoue , Hirotetsu Suzuki , Takayuki Shirane , Takahito Nakayama
IPC: H01M10/0587 , H01M4/02 , H01M4/587 , H01M50/107
Abstract: A cylindrical secondary battery comprises an external can that has a cylindrical tube part and an electrode body that is provided inside the tube part. The electrode body is obtained by winding a positive electrode plate and a negative electrode plate with a separator therebetween. In the external can, the ratio of the average value of the outer diameter of the middle of the tube part in the axial direction of the external can to the average value of the outer diameter of the bottom-side end of the tube part is 100.10-100.50%, and the standard deviation of the outer diameter of the middle of the tube part is 0.020-0.050 mm.
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Patent Agency Ranking
公开(公告)号：US20240396018A1
公开(公告)日：2024-11-28
申请号：US18695164
申请日：2022-09-02
Inventor： Akihiro Taniguchi , Motohiro Sakata , Kaoru Inoue , Kensuke Nakura
Abstract: A negative electrode for secondary batteries according to one embodiment of the present disclosure comprises a negative electrode collector and a negative electrode mixture layer that is arranged on the negative electrode collector. This negative electrode for secondary batteries is characterized in that: the negative electrode mixture layer comprises a negative electrode active material that contains a carbon material and an Si-based material; the negative electrode mixture layer internally has a plurality of voids; the pore size distribution of the negative electrode mixture layer as determined by a mercury intrusion method has two peak values R1 and R2; and the plurality of voids have an aspect ratio of 2 or more, the aspect ratio being obtained by dividing the length in the major axis direction by the length in the minor axis direction.
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3.发明公开公开(公告)号：US20240204166A1
公开(公告)日：2024-06-20
申请号：US18556013
申请日：2022-04-12
Inventor： Akihiro Taniguchi , Motohiro Sakata , Kaoru Inoue , Kensuke Nakura
IPC: H01M4/133 , H01M4/02 , H01M4/04 , H01M4/134 , H01M4/1393 , H01M4/1395
CPC classification number: H01M4/133 , H01M4/0404 , H01M4/134 , H01M4/1393 , H01M4/1395 , H01M2004/021 , H01M2004/027
Abstract: A negative electrode for a secondary battery according to one aspect of the present disclosure is characterized by comprising a negative electrode current collector and a negative electrode mixture layer disposed on the negative electrode current collector, and is characterized in that: the negative electrode mixture layer contains a negative electrode active material including a carbon material and a Si-based material; a pore diameter distribution of the negative electrode mixture layer as measured by a mercury press-in method has two peak values R1 and R2; the peak value R1 is in the range of 0.5-1.5 μm; the peak value R2 is in the range of 2-10 μm; an average particle diameter of the Si-based material is 4 μm or more; and the contained amount of the Si-based material with respect to the total amount of the negative electrode active material is 30 mass % or more.
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公开(公告)号：US20240088352A1
公开(公告)日：2024-03-14
申请号：US18273902
申请日：2022-01-24
Inventor： Kaoru Inoue , Motohiro Sakata , Akihiro Taniguchi
Abstract: Provided is a negative electrode active material for secondary batteries that is capable of inhibiting negative electrode swelling and the decline of the charge/discharge cycle characteristics of a battery. A negative electrode active material for secondary batteries according to the present disclosure is characterized by including a Si-based material, activated carbon, and a conductive material, and in that the Si-based material and the conductive material are carried in pores of the activated carbon.
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5.发明公开公开(公告)号：US20240055583A1
公开(公告)日：2024-02-15
申请号：US18267249
申请日：2021-12-24
Inventor： Kaoru Inoue , Yosuke Sato , Kensuke Nakura , Akihiro Taniguchi
CPC classification number: H01M4/366 , H01M4/587 , H01M4/5825 , H01M4/133 , H01M4/131 , H01M2004/027
Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, according to one embodiment of the present invention, is provided with a negative electrode core and a negative electrode mixture layer provided on the surface of the negative electrode core. The negative electrode mixture layer has a first layer that includes: at least one of at least one kind of metal element selected from Si, Sn, Sb, Mg, and Ge, and a compound containing said metal element; at least one of multi-walled carbon nanotubes and single-walled carbon nanotubes; and a binding agent. The negative electrode mixture layer also has a second layer that includes graphite A with a particle fracture strength of 10-35 MPa. The porosity of the first layer is preferably 50-65%.
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公开(公告)号：US20250046920A1
公开(公告)日：2025-02-06
申请号：US18720197
申请日：2022-11-16
Inventor： Kaoru Inoue , Hirotetsu Suzuki , Takayuki Shirane , Takahito Nakayama
IPC: H01M50/136 , H01M4/133 , H01M4/134 , H01M4/36 , H01M10/0525 , H01M10/0587 , H01M50/133
Abstract: A cylindrical secondary battery comprises an outer package can with a cylindrical cylinder part and an electrode body arranged within the cylinder part. A ratio of the minimum value of the outer diameters in the cylinder central part of the outer package can, the cylinder central part being positioned in the center in the axial direction, to the average value of the outer diameters in the cylinder bottom end part is 99.89% or more; and the ratio of the maximum value of the outer diameters in the cylinder central part to the average value of the outer diameters in the cylinder bottom end part is 100.80% or less. The outer diameters in the cylinder central part periodically change with respect to the angle of circumference; and the period in which the outer diameters in the cylinder central part change with respect to the angle of circumference is 0.4π to 1.0π.
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