公开(公告)号：US20250038274A1

公开(公告)日：2025-01-30

申请号：US18720101

申请日：2022-11-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

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.

公开(公告)号：US10811729B2

公开(公告)日：2020-10-20

申请号：US15957047

申请日：2018-04-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomoki Tsuji ,  Masahiro Shiraga ,  Manabu Takijiri ,  Takayuki Shirane ,  Hiroyuki Fujimoto

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/525 ,  H01M4/131 ,  H01M2/36 ,  H01M4/02

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode including a positive electrode mix layer, a negative electrode including a negative electrode mix layer, and a nonaqueous electrolyte containing a nonaqueous solvent. A surface of the negative electrode mix layer is provided with grooves. The nonaqueous electrolyte contains 10 volume percent or more of a fluorinated solvent with respect to the volume of the nonaqueous solvent and has a viscosity (25° C.) of 3.50 mPa·s or more as measured with a differential pressure viscometer.

公开(公告)号：US20180123173A1

公开(公告)日：2018-05-03

申请号：US15859856

申请日：2018-01-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takayuki Shirane ,  Takanobu Chiga

IPC: H01M10/0587 ,  H01M10/0525 ,  H01M10/44 ,  H01M4/131 ,  H01M4/133 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0569

CPC classification number: H01M10/0587 ,  H01M4/131 ,  H01M4/133 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0431 ,  H01M10/0525 ,  H01M10/0569 ,  H01M10/446 ,  H01M2220/20 ,  H01M2300/004 ,  Y02E60/122 ,  Y02T10/7011

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The negative electrode includes an opposing region that opposes the positive electrode with the separator disposed therebetween and a non-opposing region that does not oppose the positive electrode but opposes the separator. In the case that the discharge cut-off voltage of the nonaqueous electrolyte secondary battery is in the range of 2.5 V to 3.0 V, a part of the non-opposing region adjacent to a boundary between the opposing region and the non-opposing region has an electric potential plateau in the range of −0.02 V to +0.02 V relative to a negative electrode potential in the opposing region.

公开(公告)号：US20180241087A1

公开(公告)日：2018-08-23

申请号：US15957047

申请日：2018-04-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomoki Tsuji ,  Masahiro Shiraga ,  Manabu Takijiri ,  Takayuki Shirane ,  Hiroyuki Fujimoto

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/525

CPC classification number: H01M10/0569 ,  H01M2/36 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2004/025 ,  H01M2004/028 ,  H01M2300/0034

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode including a positive electrode mix layer, a negative electrode including a negative electrode mix layer, and a nonaqueous electrolyte containing a nonaqueous solvent. A surface of the negative electrode mix layer is provided with grooves. The nonaqueous electrolyte contains 10 volume percent or more of a fluorinated solvent with respect to the volume of the nonaqueous solvent and has a viscosity (25° C.) of 3.50 mPa·s or more as measured with a differential pressure viscometer.

公开(公告)号：US20250046920A1

公开(公告)日：2025-02-06

申请号：US18720197

申请日：2022-11-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

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.

公开(公告)号：US11199590B2

公开(公告)日：2021-12-14

申请号：US16847670

申请日：2020-04-14

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takayuki Shirane ,  Mikiya Fujii ,  Koji Morikawa

IPC: G01R31/367 ,  H01M10/42 ,  G01R31/374 ,  G01R31/3835

Abstract: A safety estimation device for batteries includes a parameter acquirer that acquires a design parameter of a battery, a calculator that calculates voltage behavior of the battery from the design parameter, based on a machine-learned logical model, and an outputter that outputs the voltage behavior as information about safety regarding heat generation of the battery.

公开(公告)号：US11056723B2

公开(公告)日：2021-07-06

申请号：US15859856

申请日：2018-01-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takayuki Shirane ,  Takanobu Chiga

IPC: H01M10/0587 ,  H01M10/0525 ,  H01M4/587 ,  H01M10/44 ,  H01M10/04 ,  H01M4/525 ,  H01M10/0569 ,  H01M4/131 ,  H01M4/133

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The negative electrode includes an opposing region that opposes the positive electrode with the separator disposed therebetween and a non-opposing region that does not oppose the positive electrode but opposes the separator. In the case that the discharge cut-off voltage of the nonaqueous electrolyte secondary battery is in the range of 2.5 V to 3.0 V, a part of the non-opposing region adjacent to a boundary between the opposing region and the non-opposing region has an electric potential plateau in the range of −0.02 V to +0.02 V relative to a negative electrode potential in the opposing region.