公开(公告)号：US20230091279A1

公开(公告)日：2023-03-23

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 ,  G01R31/396 ,  G01R31/392 ,  G01R31/3842 ,  G01R31/367 ,  H02J7/00

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 SOC 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：US20220231329A1

公开(公告)日：2022-07-21

申请号：US17577356

申请日：2022-01-17

Applicant: HONDA MOTOR CO., LTD.

Inventor： Toshiyuki ARIGA ,  Takuya TANIUCHI ,  Masahiro OHTA ,  Toshimitsu TANAKA ,  Kiyoshi TANAAMI

IPC: H01M10/0562 ,  H01M10/04 ,  H01M50/109 ,  H01M50/153 ,  H01M50/169 ,  H01M4/76 ,  H01M4/66

Abstract: To provide a current collecting structure capable of reliably collecting current while maintaining a pressurized and constrained state of a coin-type all-solid-state battery. A coin-type all-solid-state battery includes a solid electrolyte layer; a pair of first electrode current collectors each including a metal porous body, the first electrode current collectors being respectively disposed on both sides of the solid electrolyte layer; a pair of second electrode current collectors each including a metal porous body, the second electrode current collectors being respectively disposed on outer sides of the first electrode current collectors; and a pair of lid members being respectively disposed on outer sides of the pair of second electrode current collectors.

公开(公告)号：US20220231328A1

公开(公告)日：2022-07-21

申请号：US17572527

申请日：2022-01-10

Applicant: HONDA MOTOR CO., LTD.

Inventor： Toshiyuki ARIGA ,  Takuya TANIUCHI ,  Masahiro OHTA

IPC: H01M10/0562 ,  H01M50/533 ,  H01M10/0585 ,  H01M4/66 ,  H01M4/76 ,  H01M10/0525

Abstract: To prevent the breakage of a bonding portion when current collector tabs are converged and bonded, and thereby maintain a current path. A plurality of electrode current collectors each including a metal porous body, a plurality of tabs each extending from an end of the metal porous body of each of the electrode current collectors, and a connecting tab lead that electrically connects the tabs, are included. The connecting tab lead is cross-bonded with each of the tabs to form a first compression bonding portion, and is further folded from a first of the tabs to a second of the tabs, for example, the connecting tab lead is arranged in a bellows shape. At a tab convergence location where the first compression bonding portions are stacked, the tabs are converged by forming a second compression bonding portion by ultrasonic waves or other means.

公开(公告)号：US20220200009A1

公开(公告)日：2022-06-23

申请号：US17451326

申请日：2021-10-19

Applicant: HONDA MOTOR CO., LTD.

Inventor： Takuya TANIUCHI ,  Masahiro OHTA ,  Toshiyuki ARIGA

IPC: H01M4/66 ,  H01M50/116

Abstract: A secondary battery electrode includes: a current collector made of a porous metal material; and an electrode material mixture with which the current collector is filled. The current collector includes a material mixture-filled segment that is filled with the electrode material mixture, and a material mixture-unfilled segment that is unfilled with the electrode material mixture. The material mixture-unfilled segment includes a current-collecting tab which is thinner than the material mixture-filled segment and in which the porous metal material is present at a higher density than in the material mixture-filled segment, and a tab convergence portion via which the material mixture-filled segment is coupled to the current-collecting tab. The tab convergence portion is provided with at least one rib extending from a side adjacent to the material mixture-filled segment toward the current-collecting tab.

公开(公告)号：US20220181677A1

公开(公告)日：2022-06-09

申请号：US17456589

申请日：2021-11-25

Applicant: HONDA MOTOR CO., LTD.

Inventor： Takuya TANIUCHI ,  Masahiro OHTA ,  Toshiyuki ARIGA

IPC: H01M10/0562 ,  H01M4/80 ,  H01M10/0525 ,  H01M10/0585 ,  H01M10/0566

Abstract: To provide a lithium ion secondary battery that allows the cell state to be monitored by arranging a reference electrode, even in a solid-state battery. In a lithium ion secondary battery 50, a positive electrode 1, a reference electrode 3, and a negative electrode 2 are arranged in this sequence. The positive electrode 1 includes a first current collector 11 including a metal porous body, and a first electrode material mixture 15 with which pores of the first current collector 11 are filled. The negative electrode 2 includes a second current collector 21 including a metal porous body, and a second electrode material mixture 25 with which pores of the second current collector 21 are filled. The reference electrode 3 includes a third current collector 31 including a metal porous body, and a solid electrolyte 35 with which pores of the third current collector 31 are filled.

公开(公告)号：US20210296688A1

公开(公告)日：2021-09-23

申请号：US17200891

申请日：2021-03-14

Applicant: HONDA MOTOR CO., LTD.

Inventor： Wataru SHIMIZU ,  Masahiro OHTA

IPC: H01M10/0562 ,  H01M50/186 ,  H01M10/0585

Abstract: To provide an electrical storage device in which a positive electrode material and a negative electrode material are each impregnated with a different type of electrolytic solution and a method for making the same. An electrical storage device (1) includes a negative electrode (2) including an organic electrolytic solution (21), a positive electrode (3) including an aqueous electrolytic solution (31), and a solid electrolyte (4) disposed between the negative electrode (2) and the positive electrode (3). The negative electrode (2) is entirely sealed. The electrical storage device (1) includes a sealing member (5), which is provided at the periphery of the negative electrode (2) and seals the negative electrode (2). The solid electrolytes (4) form a pair including a sealing material and together with the sealing member (5) seal the negative electrode (2) so that the negative electrode (2) is disposed between the solid electrolytes (4).

公开(公告)号：US20210273235A1

公开(公告)日：2021-09-02

申请号：US17261181

申请日：2019-07-12

Applicant: HONDA MOTOR CO., LTD.

Inventor： Takuya TANIUCHI ,  Masahiro OHTA ,  Shin IRINO

IPC: H01M4/70 ,  H01M4/04 ,  H01M4/139 ,  H01M10/0562 ,  H01M10/0585 ,  H01M4/58

Abstract: A positive electrode for a solid-state battery, a manufacturing method of the positive electrode for the solid-state battery, and the solid-state battery are provided such that the occurrence of cracking during lamination pressing at the time of manufacturing the solid-state battery and short-circuiting due to contact with a tab can be suppressed.
A guide is provided on the outer periphery of a positive electrode active material layer, whereby pressure applied during the lamination pressing is dispersed, and short-circuiting due to contact with a tab is suppressed.
Specifically, the guide is provided on at least two adjoining sides of the outer periphery of the positive electrode active material layer of a surface having the positive electrode active material layer.

公开(公告)号：US20210257654A1

公开(公告)日：2021-08-19

申请号：US17133661

申请日：2020-12-24

Applicant: HONDA MOTOR CO., LTD.

Inventor： Takuya TANIUCHI ,  Masahiro OHTA

IPC: H01M10/04 ,  H01M10/0585 ,  H01M10/0525 ,  H01M50/531 ,  H01M50/503

Abstract: The present invention provides a solid-state battery cell and a solid-state battery module including the same. The solid-state battery cell includes: a laminate including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer present between the positive electrode layer and the negative electrode layer; a positive electrode tab connected to the positive electrode layer; a negative electrode tab connected to the negative electrode layer; and a pair of conductive clamping plates clamping the laminate from both sides in a laminating direction of the laminate. One of the pair of clamping plates is electrically connected to the positive electrode tab, and the other clamping plate is electrically connected to the negative electrode tab.

公开(公告)号：US20210226258A1

公开(公告)日：2021-07-22

申请号：US17147479

申请日：2021-01-13

Applicant: HONDA MOTOR CO., LTD.

Inventor： Masahiro OHTA ,  Takuya TANIUCHI

IPC: H01M10/0585 ,  H01M10/0525

Abstract: To provide a solid-state battery allowing the yield of the solid-state battery to be improved and further the durability of the solid-state battery to be improved. A solid-state battery (10) includes a positive electrode layer (3) containing a positive electrode active material, a negative electrode layer (2) containing a negative electrode active material, and a solid electrolyte (1) interposed between the positive electrode layer (3) and the negative electrode layer (2). The solid electrolyte (1) includes a positive electrode-side electrolyte layer (1a) in contact with the positive electrode layer (3) and a negative electrode-side electrolyte layer (1b) in contact with the negative electrode layer (2). In the solid electrolyte (1), an area SSE2 of the positive electrode side of the positive electrode-side electrolyte layer (1a) differs from an area SSE1 of the negative electrode side of the negative electrode-side electrolyte layer (1b).

公开(公告)号：US20200295320A1

公开(公告)日：2020-09-17

申请号：US16753074

申请日：2017-10-10

Applicant: HONDA MOTOR CO., LTD.

Inventor： Ushio HARADA ,  Masahiro OHTA ,  Tadashi TSUNODA ,  Sokichi OKUBO ,  Hiroto MAEYAMA ,  Noriaki KAMAYA ,  Toru SUKIGARA

IPC: H01M2/10

Abstract: A cell holder (1) for holding a secondary battery cell (9) including a positive electrode active material, a negative electrode active material, and an electrolyte which is disposed between the positive electrode active material and the negative electrode active material and is in contact with both the positive electrode active material and the negative electrode active material, and for outputting power from the secondary battery cell (9), includes a cell holder body (30), and a pressing portion (10) which is supported by the cell holder body (30) and includes a disc spring (11) being in contact with a first end face of the secondary battery cell (9) in a first direction and pressing the first end face of the secondary battery cell (9) in a second direction opposite to the first direction.