公开(公告)号：US11860233B2

公开(公告)日：2024-01-02

申请号：US17818002

申请日：2022-08-08

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki Chiba ,  Masahiro Ohta

IPC: G01R31/374 ,  H01M10/48 ,  H01M10/42 ,  H01M10/44 ,  G01R31/392 ,  G01R31/3842 ,  G01R31/367 ,  H02J7/00 ,  G01R31/396

CPC classification number: G01R31/374 ,  G01R31/367 ,  G01R31/3842 ,  G01R31/392 ,  G01R31/396 ,  H01M10/425 ,  H01M10/44 ,  H01M10/486 ,  H02J7/0048 ,  H01M2010/4271

Abstract: The battery unit includes a storage configured to store (A1) and (A2) below, and a battery state estimator.



(A1): a table map OCV vs. SOC characteristics.
(A2): HF vs. SOC initial characteristics.




The battery state estimator estimates, based on (A1), a start SOC corresponding to a detected OCV at a start of charge; measures HF vs. SOC present characteristics and detects a peak of differential characteristics of the measured HF vs. SOC present characteristics during the charge; determines a SOC at the detected peak as a SOC(HF) based on (A2); calculates a charge capacity from the start of the charge to detection of the peak; calculates a SOC(OCV) based on the calculated charge capacity and the start SOC; and in a case where the SOC(OCV) deviates with respect to the SOC(HF) by an amount of deviation equal to or greater than a predetermined value, corrects (A1).

公开(公告)号：US12111362B2

公开(公告)日：2024-10-08

申请号：US18065631

申请日：2022-12-14

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki Chiba ,  Toshiyuki Ariga

IPC: G01R31/374 ,  G01R31/367 ,  G01R31/3835 ,  G01R31/396 ,  H01M10/44 ,  H01M10/48 ,  H02J7/00

CPC classification number: G01R31/374 ,  G01R31/367 ,  G01R31/3835 ,  G01R31/396 ,  H01M10/441 ,  H01M10/482 ,  H01M10/486 ,  H01M2220/20 ,  H02J7/0048

Abstract: A battery unit includes: a module including m cell groups that are connected in series and each include n cells connected in parallel; m voltage detectors; (m×(n−1)) heat flow detectors; a storage; and a state estimator. The storage stores a table map of OCV vs. SOC characteristics (A1) and a table map of HF vs. SOC characteristics (A2). For each of the m cell groups, the state estimator is configured to: determine, based on the (A2), a true SOC of (n−1) cells that corresponds to a heat flow detected; determine, based on the (A1), an OCV of the (n−1) cells that corresponds to the determined true SOC; calculates an OCV of a remaining cell from the determined OCV and a detected composite voltage; and determine, based on the (A1), a true SOC of the remaining cell that corresponds to the calculated OCV.

公开(公告)号：US20240194869A1

公开(公告)日：2024-06-13

申请号：US18531752

申请日：2023-12-07

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki Chiba ,  Kazumasa Sakatsume ,  Akihisa Tanaka ,  Takashi Hakari ,  Yoshiya Fujiwara ,  Yoshiyuki Morita

IPC: H01M4/525 ,  H01M4/04 ,  H01M4/505 ,  H01M10/052

CPC classification number: H01M4/525 ,  H01M4/0471 ,  H01M4/505 ,  H01M10/052 ,  H01M2004/021

Abstract: The present invention relates to a lithium nickel manganese composite oxide which includes secondary particles in which a plurality of primary particles are aggregated with each other, and is represented by General Formula (1): LixNiyMnzO2 (in Formula (1), x is 0.95≤x≤1.1, y is 0.45≤y≤0.5, z is 0.45≤z≤0.5, and y=z is satisfied), wherein Li contained in a transition metal layer does not form LiMn6, wherein the lithium nickel manganese composite oxide has a manganese-rich layer from a surface of the secondary particles toward an inside of the secondary particles, wherein a ratio of a number of Mn atoms to a number of Ni atoms (Mn/Ni ratio) in the manganese-rich layer is 1.0 or more and 1.5 or less, and wherein the lithium nickel manganese composite oxide has a space group R-3m, an a-axis lattice constant of 2.87 Å to 2.90 Å, and a c-axis lattice constant of 14.28 Å to 14.32 Å.

公开(公告)号：US11710856B2

公开(公告)日：2023-07-25

申请号：US16727887

申请日：2019-12-26

Applicant: Honda Motor Co., Ltd.

Inventor： Atsushi Ogawa ,  Ushio Harada ,  Hiroto Maeyama ,  Toru Sukigara ,  Kazuki Chiba

IPC: H01M10/0585 ,  H01M10/0562 ,  H01M50/451 ,  H01M50/457 ,  H01M50/489 ,  H01M50/491 ,  H01M50/497

CPC classification number: H01M10/0585 ,  H01M10/0562 ,  H01M50/451 ,  H01M50/457 ,  H01M50/489 ,  H01M50/491 ,  H01M50/497 ,  H01M2300/0068 ,  H01M2300/0094

Abstract: Provided is a solid electrolyte laminated sheet having a self-supporting property and capable of realizing a solid state battery having high output characteristics. A plurality of supports are used, a solid electrolyte is filled in each support to form a self-supporting sheet, and the self-supporting sheets are superimposed to form a solid electrolyte laminated sheet. Specifically, the solid electrolyte laminated sheet is configured by setting a layer of the solid electrolyte laminated sheet in contact with a positive electrode layer being the outermost layer as a self-supporting sheet in which a solid electrolyte resistant to oxidation is filled, and a layer in contact with a negative electrode layer being the opposite outermost layer as a self-supporting sheet in which a solid electrolyte resistant to reduction is filled.

公开(公告)号：US20230155124A1

公开(公告)日：2023-05-18

申请号：US18050598

申请日：2022-10-28

Applicant: University of Central Florida Research Foundation, Inc. ,  Honda Motor Co., Ltd.

Inventor： Akihiro Kushima ,  Yoshiya Fujiwara ,  Yoshiyuki Morita ,  Akihisa Tanaka ,  Kazuki Chiba

IPC: H01M4/505 ,  H01M10/0525 ,  H01M4/04

CPC classification number: H01M4/505 ,  H01M4/0416 ,  H01M4/0471 ,  H01M10/0525

Abstract: A nickel-free and cobalt-free cathode material for a lithium (Li) battery is provided. The cathode material includes, LiaAl1-x-y-z FexMnyZnzO2-δ, wherein a, x, y, z, and δ are in the following ranges: 0.95 ≤ a ≤ 1.2; 0 ≤ x ≤ 0.3; 0 ≤ y ≤ 0.3; 0 ≤ z ≤ 0.3; 0.5 ≤ x + y + z ≤ 0.99; 0 ≤ δ ≤ 0.1. In various embodiments, the present invention provides an improved Co-free/Ni-free Li-ion battery (LIB) cathode that exhibits good thermal stability and is capable of realizing a high cell voltage and specific capacity comparable to, or exceeding, currently known Li(NiCoMn)O2 cathodes. The novel cathode chemistry in accordance with the embodiments of the present invention eliminates any potential cobalt supply issues and lowers the overall cost of the battery.

公开(公告)号：US20240190722A1

公开(公告)日：2024-06-13

申请号：US18528830

申请日：2023-12-05

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki Chiba ,  Takashi Hakari ,  Akihisa Tanaka ,  Kazumasa Sakatsume ,  Yoshiya Fujiwara ,  Yoshiyuki Morita

IPC: C01G53/00 ,  H01M10/052

CPC classification number: C01G53/50 ,  H01M10/052 ,  C01P2002/86 ,  C01P2004/45 ,  C01P2006/40

Abstract: The present invention relates to a lithium nickel manganese composite oxide which includes secondary particles in which a plurality of primary particles are aggregated with each other, and is represented by General Formula (1): LixNiyMnzO2 (in Formula (1), x is 1.0≤x≤1.07, y is 0.45≤y≤0.55, z is 0.45≤z≤0.55, and 1.0≤z/y≤1.22 is satisfied), wherein Li contained in a transition metal layer does not form LiMn6, wherein the lithium nickel manganese composite oxide has a manganese-rich layer from a surface of the secondary particles toward an inside of the secondary particles, wherein a ratio of a number of Mn atoms to a number of Ni atoms (Mn/Ni ratio) in the manganese-rich layer is 1.0 or more and 3.0 or less, and wherein the lithium nickel manganese composite oxide has a space group R-3m, an a-axis lattice constant of 2.87 Å to 2.90 Å, and a c-axis lattice constant of 14.28 Å to 14.32 Å.

公开(公告)号：US11749835B2

公开(公告)日：2023-09-05

申请号：US16673964

申请日：2019-11-05

Applicant: Honda Motor Co., Ltd.

Inventor： Atsushi Ogawa ,  Ushio Harada ,  Hiroto Maeyama ,  Toru Sukigara ,  Kazuki Chiba

IPC: H01M10/0562

CPC classification number: H01M10/0562

Abstract: Provided is a solid electrolyte sheet having a self-supporting property while having a small thickness and flexibility. The solid electrolyte sheet is formed using a support having a specific porosity and a specific thickness. Specifically, the solid electrolyte sheet is formed in which a solid electrolyte is filled in a support having a porosity of 60% or more and 95% or less and a thickness of 5 μm or more and less than 20 μm.