公开(公告)号：US20240387892A1

公开(公告)日：2024-11-21

申请号：US18565244

申请日：2022-06-16

Applicant: DOWA ECO SYSTEM CO., LTD. ,  AKITA UNIVERSITY

Inventor： Tatsuya YODOSE ,  Ryoei WATANABE ,  Yoshihiro HONMA ,  Seiji KUMAGAI

IPC: H01M10/54 ,  C01G53/00 ,  C22C29/12 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

Abstract: There is provided a recycled cathode material precursor, including: a metal element α consisting of at least one of nickel, cobalt and manganese; and a metal element β consisting of at least one of iron, copper and aluminum, wherein a content of the metal element β is 0.5 to 20% by mass in the recycled cathode material precursor.

公开(公告)号：US20240243381A1

公开(公告)日：2024-07-18

申请号：US18561768

申请日：2022-03-01

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Masataka YAMASHITA ,  Yoshihiro HONMA ,  Chihiro NISHIKAWA ,  Jiahao LIU ,  Shota TAHATA ,  Changzhi LIU

IPC: H01M10/54 ,  C22B1/02 ,  C22B7/00

CPC classification number: H01M10/54 ,  C22B1/02 ,  C22B7/005

Abstract: A method of separating valuable materials. The method includes a heat treatment step of performing a heat treatment on a lithium-ion secondary battery including valuable materials, a crushing step of crushing a heat-treated product obtained in the heat treatment step, and a classification step including a first classification step of classifying a crushed product obtained in the crushing step into a coarse-particle product and an intermediate product at a classification cut-point of 0.6 mm or greater and 2.4 mm or less, and a second classification step of classifying the intermediate product into a medium-particle product and a fine-particle product at a classification cut-point of 40 μm or greater and 300 μm or less.

公开(公告)号：US20230366061A1

公开(公告)日：2023-11-16

申请号：US18025490

申请日：2021-09-07

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Chihiro NISHIKAWA ,  Yoshihiro HONMA ,  Ryoei WATANABE ,  Masataka YAMASHITA

IPC: C22B15/00 ,  H01M10/54 ,  C22B1/24 ,  C22B7/00

CPC classification number: C22B15/0056 ,  H01M10/54 ,  C22B1/24 ,  C22B7/003

Abstract: A method for recovering a valuable substance is provided. The method includes a thermal treatment step of thermally treating a target containing a valuable substance using a continuous furnace configured to thermally treat the target while moving a target storing unit, in which the target is stored, such that the target storing unit is not contacted by a flame that is for thermal treatment, and a valuable substance recovering step of recovering the valuable substance from a thermally treated product of the target obtained in the thermal treatment step.

公开(公告)号：US20230323506A1

公开(公告)日：2023-10-12

申请号：US18025485

申请日：2021-09-07

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Chihiro NISHIKAWA ,  Yoshihiro HONMA ,  Ryoei WATANABE ,  Masataka YAMASHITA ,  Youichi FUKUCHI ,  Tomotaka IZUMI ,  Yoshiki ITO

IPC: C22B9/22 ,  H01M10/54 ,  C22B15/00

CPC classification number: C22B9/22 ,  H01M10/54 ,  C22B15/0056 ,  C22B15/0095

Abstract: A method for recovering a valuable substance is provided. The method includes a thermal treatment step of thermally treating a target, which contains a valuable substance and is stored in a target storing unit, via a flame blocking unit configured to block a flame for thermally treating the target such that the target storing unit is not contacted by the flame, and a valuable substance recovering step of recovering the valuable substance from a thermally treated product of the target obtained in the thermal treatment step.

公开(公告)号：US20230119544A1

公开(公告)日：2023-04-20

申请号：US17908740

申请日：2021-03-01

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Ryoei WATANABE ,  Yoshihiro HONMA ,  Chihiro NISHIKAWA ,  Masataka YAMASHITA ,  Jiahao LIU

IPC: C22B23/02 ,  H01M10/54 ,  C22B1/00

Abstract: Provided is a method for concentrating a valuable metal contained in a lithium ion secondary battery, for processing a lithium ion secondary battery containing at least one element selected from the group consisting of cobalt and nickel, or a positive electrode material of the lithium ion secondary battery, to concentrate a valuable metal containing either or both of cobalt and nickel. The method includes a thermal treatment step of thermally treating the lithium ion secondary battery or the positive electrode material thereof, to form a granular aggregate containing at least one valuable metal selected from the group consisting of cobalt and nickel.

公开(公告)号：US20230411719A1

公开(公告)日：2023-12-21

申请号：US18025498

申请日：2021-09-07

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Chihiro NISHIKAWA ,  Yoshihiro HONMA ,  Ryoei WATANABE ,  Masataka YAMASHITA

IPC: H01M10/54 ,  C22B7/00 ,  C22B15/00

CPC classification number: H01M10/54 ,  C22B7/005 ,  C22B15/0004

Abstract: A method for recovering a valuable substance from a lithium ion secondary battery is provided. The method includes a thermal treatment step of thermally treating a lithium ion secondary battery containing aluminum, carbon, and a copper foil as constituting materials, and a wet sorting step of applying an external force to a thermally treated product obtained in the thermal treatment step in the presence of a liquid, to sort the thermally treated product into a heavy product and a light product containing copper.

公开(公告)号：US20230116994A1

公开(公告)日：2023-04-20

申请号：US17793515

申请日：2021-01-13

Applicant: DOWA ECO SYSTEM CO., LTD.

Inventor： Shota TAHATA ,  Hisashi SASAKI ,  Ryoei WATANABE

IPC: B09B3/35 ,  B07B4/00 ,  B02C23/20 ,  C22B7/00

Abstract: A metal recovery method includes crushing a photovoltaic module or a photovoltaic sheet-like structure to form debris; and sorting the debris, wherein the photovoltaic sheet-like structure is obtained by removing a glass substrate and a frame member from the photovoltaic module, and includes at least a photovoltaic cell, a metal pattern wired from the photovoltaic cell, and an encapsulant to encapsulate the photovoltaic cell and the metal pattern.

公开(公告)号：US20210210807A1

公开(公告)日：2021-07-08

申请号：US16733537

申请日：2020-01-03

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Chihiro NISHIKAWA ,  Yoshihiro HONMA ,  Norio NAKAJIMA

IPC: H01M10/54 ,  H01M10/0525 ,  H01M2/02 ,  H01M4/587 ,  H01M4/66 ,  B03C1/30 ,  B02C23/10

Abstract: A method for recovering a valuable material from a lithium ion secondary battery includes: a heat treatment step of performing heat treatment on a lithium ion secondary battery; a crushing step of crushing a heat-treated object obtained through the heat treatment step; a first stage of classification step of classifying a crushed object obtained through the crushing step based on a classification point of 1.2 to 2.4 mm, and a second stage of classification step of classifying an intermediate product and a fine particle product obtained on a fine side in the first stage of classification step based on a classification point of 0.3 mm or less; and a dry magnetic separation step of repeating one time or more a step of performing dry magnetic separation on an intermediate product obtained on a coarse side in the second stage of classification step and performing dry magnetic separation again.