公开(公告)号：US09359659B2

公开(公告)日：2016-06-07

申请号：US13927428

申请日：2013-06-26

Applicant: DOWA ECO-SYSTEM Co., Ltd.

Inventor： Koji Fujita ,  Satoshi Kawakami ,  Yoshihiro Honma ,  Ryoei Watanabe

IPC: C22C19/07 ,  C22B7/00 ,  C22B3/00 ,  H01M10/54 ,  C22B23/00 ,  H01M10/0525

CPC classification number: C22C19/07 ,  C22B7/007 ,  C22B23/005 ,  C22B23/04 ,  C22B23/0407 ,  H01M10/0525 ,  H01M10/54 ,  Y02P10/234 ,  Y02T10/7011 ,  Y02W30/84

Abstract: A method for recovering a valuable material from a lithium-ion secondary battery, the method contains: roasting a lithium-ion secondary battery containing a valuable material in a metal battery case thereof to obtain a roasted material; stirring the roasted material with liquid to separate contents containing the valuable material from the inside of the metal battery case; and sorting the contents separated by the separation and the metal battery case to obtain a recovered material containing the valuable material.

Abstract translation: 一种从锂离子二次电池中回收有价值的材料的方法，该方法包括：在其金属电池壳体中焙烧含有贵重材料的锂离子二次电池以获得焙烧材料; 用液体搅拌焙烧的物料，将含有贵重物质的内容物从金属电池盒的内部分离; 并分离由分离物和金属电池壳体分离的内容物，以获得含有有价物质的回收材料。

公开(公告)号：US11482737B2

公开(公告)日：2022-10-25

申请号：US16733525

申请日：2020-01-03

Applicant: DOWA ECO-SYSTEM CO., LTD.

Inventor： Chihiro Nishikawa ,  Yoshihiro Honma ,  Norio Nakajima

IPC: H01M10/54 ,  H01M10/0525 ,  H01M4/66 ,  H01M4/587 ,  H01M50/116 ,  B03C1/10 ,  B02C23/10 ,  B02C23/20 ,  B03C1/28 ,  H01M4/02

Abstract: There is provided a means capable of recovering a valuable material such as cobalt and nickel, with a low grade of a metal derived from a negative electrode current collector, a low grade of fluorine, and a low grade of a material derived from a negative electrode active material. A method for recovering a valuable material from a lithium ion secondary battery, is characterized in that it 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 classification step of classifying a crushed object obtained through the crushing step into a coarse particle product and a fine particle product; and a wet magnetic separation step of performing wet magnetic separation on the fine particle product obtained through the classification step.

公开(公告)号：US12107244B2

公开(公告)日：2024-10-01

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 ,  B02C19/18 ,  B02C23/10 ,  B02C23/14 ,  B02C23/16 ,  B03C1/30 ,  H01M10/0525

CPC classification number: H01M10/54 ,  B02C19/186 ,  B02C23/10 ,  B02C23/14 ,  B02C23/16 ,  B03C1/30 ,  H01M10/0525 ,  B03C2201/20

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.