公开(公告)号：US20210119304A1

公开(公告)日：2021-04-22

申请号：US17041432

申请日：2019-02-27

Applicant: HONDA MOTOR CO., LTD.

Inventor： Masahiro OHTA ,  Takuya TANIUCHI

IPC: H01M50/533 ,  H01M4/13

Abstract: Provided are: a current collector tab for solid-state batteries that minimizes the occurrence of cracks in an electrode active material and that makes it possible to minimize peeling within an electrode sheet or interlayer peeling in a layered body of an electrode and a solid electrolyte; a current collector; and an electrode sheet.
A stress relaxation section is provided to a current collector tab for a positive electrode sheet or a negative electrode sheet.
Specifically, the current collector tab for solid-state batteries comprises a stress relaxation section in a bent area occurring when a plurality of the current collector tabs are bundled in a solid-state battery cell.

公开(公告)号：US20240322225A1

公开(公告)日：2024-09-26

申请号：US18583877

申请日：2024-02-22

Applicant: HONDA MOTOR CO., LTD.

Inventor： Masahiro OHTA ,  Masanari HIGUCHI ,  Atsushi OGAWA

IPC: H01M10/0562

CPC classification number: H01M10/0562

Abstract: A solid-state battery is provided which can improve the adhesion between a solid electrolyte layer and electrode layer, and ion conductivity. A solid-state battery includes a positive electrode layer containing a positive electrode active material; a negative electrode layer; and a solid electrolyte layer containing solid electrolyte and disposed between the positive electrode layer and the negative electrode layer, in which at least either of an interface between the positive electrode layer and the solid electrolyte layer, and an interface between the negative electrode layer and solid electrolyte layer has fiber coated by the solid electrolyte.

公开(公告)号：US20230090747A1

公开(公告)日：2023-03-23

申请号：US17818719

申请日：2022-08-10

Applicant: HONDA MOTOR CO., LTD.

Inventor： Kazuki CHIBA ,  Masahiro OHTA

IPC: G01R31/36 ,  G01R31/396 ,  G01R31/388 ,  G01R31/392

Abstract: The battery unit includes: a battery module including a battery cell; a battery heat flow detector configured to detect a heat flow of the battery cell; a storage configured to store heat flow HF vs. state of charge SOC initial characteristics of the battery cell; and a battery state estimator configured to estimate a state of health SOH of the battery cell. The battery state estimator measures, during charge of the battery cell, HF vs. SOC present characteristics of the battery cell, based on the detected heat flow of the battery cell, and estimates a state of health SOH of the battery cell, from a ratio between a length mAh of a line segment between peaks of differential characteristics of the measured HF vs. SOC present characteristics and a length mAh of a line segment between peaks of differential characteristics of the stored HF vs. SOC initial characteristics.

公开(公告)号：US20220320615A1

公开(公告)日：2022-10-06

申请号：US17669369

申请日：2022-02-11

Applicant: HONDA MOTOR CO., LTD.

Inventor： Masahiro OHTA ,  Kazuki CHIBA

IPC: H01M10/48 ,  H01M10/6554 ,  H01M50/505 ,  G01R31/392

Abstract: A battery unit includes at least one battery module that includes at least one battery cell, at least one battery heat flow detector that detects a heat flow of the at least one battery cell and the battery unit, at least one reference heat flow detector that detects a heat flow of the battery unit as a reference heat flow, and a battery state estimator that estimates a state of the at least one battery cell, based on a heat flow of the at least one battery cell given by subtracting the reference heat flow detected by the at least one reference heat flow detector from the heat flow detected by the at least one battery heat flow detector. The at least one reference heat flow detector is disposed in the battery unit at a location where temperature fluctuation is small and heat capacity is large.

公开(公告)号：US20220231343A1

公开(公告)日：2022-07-21

申请号：US17456883

申请日：2021-11-29

Applicant: HONDA MOTOR CO., LTD.

Inventor： Toshiyuki ARIGA ,  Takuya TANIUCHI ,  Masahiro OHTA

IPC: H01M10/0585 ,  H01M10/0525 ,  H01M50/121 ,  H01M50/533 ,  H01M50/593

Abstract: A solid-state battery includes: a solid-state battery cell Including a laminate having at least one positive electrode having a positive electrode current collector and a positive electrode active material layer, at least one negative electrode having a negative electrode current collector and a negative electrode active material layer, and a solid-state electrolyte interposed between the positive electrode and the negative electrode, and a first elastic member arranged at least on both sides of the laminate in a laminating direction; and a resin casing made of a thermosetting resin or a thermoplastic resin and which closely adheres to and covers the solid-state battery cell.

公开(公告)号：US20220223920A1

公开(公告)日：2022-07-14

申请号：US17647465

申请日：2022-01-09

Applicant: HONDA MOTOR CO., LTD.

Inventor： Toshiyuki ARIGA ,  Takuya TANIUCHI ,  Masahiro OHTA

IPC: H01M10/0585 ,  H01M4/66 ,  H01M4/76 ,  H01M4/80 ,  H01M10/0525 ,  H01M50/531

Abstract: To improve the adhesion between an electrode material mixture and a solid electrolyte, and thereby suppress electrodeposition of lithium. This electrode includes a planar electrode current collector including a metal porous body, an electrode material mixture layer that fills pores of the metal porous body, and a solid electrolyte layer that fills pores of the metal porous body. The electrode material mixture layer is formed on one side of the electrode current collector, and the solid electrolyte layer is formed on the other side of the electrode current collector. The electrode material mixture layer and the solid electrolyte layer are stacked in a planar shape in the pores of the metal porous body.

公开(公告)号：US20220181678A1

公开(公告)日：2022-06-09

申请号：US17457899

申请日：2021-12-06

Applicant: HONDA MOTOR CO., LTD.

Inventor： Takuya TANIUCHI ,  Masahiro OHTA ,  Toshiyuki ARIGA

IPC: H01M10/0562 ,  H01M10/0585 ,  H01M4/66 ,  H01M4/62 ,  H01M4/76

Abstract: To provide a solid-state battery in which the capacity and voltage can be optionally adjusted in a single battery and the installation space for the battery can be reduced. A solid-state battery includes a plurality of electrode layers, and a solid electrolyte layer disposed between the electrode layers. The electrode layers includes positive electrode portion formed by filling a current collector including a metal porous body with a positive electrode material mixture, negative electrode portion formed by filling a current collector including a metal porous body with a negative electrode material mixture, and an isolation portion formed between the positive electrode portion and the negative electrode portion. Between the plurality of electrode layers disposed adjacent to each other, the positive electrode portion and the negative electrode portion are disposed so as to face each other, and the isolation portions are disposed so as to face each other.

公开(公告)号：US20220173406A1

公开(公告)日：2022-06-02

申请号：US17456880

申请日：2021-11-29

Applicant: HONDA MOTOR CO., LTD.

Inventor： Masahiro OHTA ,  Takuya TANIUCHI

IPC: H01M4/76 ,  H01M4/66 ,  H01M4/62 ,  H01M10/0525 ,  H01M50/533

Abstract: Provided are a lithium ion secondary battery electrode that occurrence of short-circuit and contamination can be reduced and the method for manufacturing such a lithium ion secondary battery electrode. An electrode used for a lithium ion secondary battery includes a current collector formed of a metal porous body. The current collector has a mixture layer impregnated with an electrode material mixture containing an electrode active material and a non-mixture-impregnated portion not impregnated with the electrode material mixture and including a tab portion and a tab converging portion. The surface roughness Ra of the non-mixture-impregnated portion is equal to or less than the surface roughness of the mixture layer.

公开(公告)号：US20220149494A1

公开(公告)日：2022-05-12

申请号：US17453645

申请日：2021-11-04

Applicant: HONDA MOTOR CO., LTD.

Inventor： Takuya TANIUCHI ,  Masahiro OHTA ,  Toshiyuki ARIGA

IPC: H01M50/583 ,  H01M4/80 ,  H01M4/66 ,  H01M50/581

Abstract: To provide a solid-state battery having high safety and high energy density. An electrode for a solid-state battery includes a current collector that is a metal porous body, and an electrode material mixture with which the current collector is filled. The current collector has an end portion having a material mixture non-filled region that is not filled with the electrode material mixture. The material mixture non-filled region has a part that is a fuse function portion. The fuse function portion has a smaller total cross-sectional area of metal in a cross section perpendicular to a direction of the end portion than the rest of the material mixture non-filled region.

公开(公告)号：US20220140302A1

公开(公告)日：2022-05-05

申请号：US17453175

申请日：2021-11-01

Applicant: HONDA MOTOR CO., LTD.

Inventor： Masahiro OHTA ,  Takuya TANIUCHI

IPC: H01M4/04 ,  H01M4/13 ,  H01M4/36 ,  H01M10/0525

Abstract: To provide an electrode for a lithium-ion secondary battery that can reduce risk of a short circuit when a porous metal is used as a current collector.
An electrode for lithium-ion secondary battery having a positive electrode, a negative electrode, and an electrolyte disposed between the positive electrode and the negative electrode, the electrode comprising a current collector and a current collector tab, wherein the current collector is constituted by a metal porous body having voids in communication with each other, wherein a surface of the current, collector, including surfaces of the voids, is covered with an ion conductor layer, and wherein an electrode active material is disposed on the surface of the ion conductor layer of the voids.