公开(公告)号：US20180269449A1

公开(公告)日：2018-09-20

申请号：US15850058

申请日：2017-12-21

Applicant: SANYO Electric Co., Ltd.

Inventor： Tetsuya Okado ,  Keisuke Minami ,  Masashi Muraoka ,  Tomoharu Arai ,  Toyoki Fujihara

IPC: H01M2/14 ,  H01M2/10 ,  H01M10/0587

CPC classification number: H01M2/14 ,  H01M2/0217 ,  H01M2/1077 ,  H01M2/1094 ,  H01M10/0587 ,  H01M2220/20

Abstract: A battery pack includes a plurality of prismatic secondary batteries with spacers each interposed therebetween. The prismatic secondary batteries each include a flat wound electrode body that is formed by winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween; a prismatic outer body that houses the wound electrode body; and a sealing plate that seals an opening of the flat wound electrode body. The wound electrode body has a wound positive electrode core-exposed portion at one end portion and a wound negative electrode core-exposed portion at the other end portion. A positive electrode current collector is joined to the positive electrode core-exposed portion to form a positive electrode-joined portion, and a negative electrode current collector is joined to the negative electrode core-exposed portion to form a negative electrode-joined portion.

公开(公告)号：US20180097219A1

公开(公告)日：2018-04-05

申请号：US15684415

申请日：2017-08-23

Applicant: Sanyo Electric Co., Ltd.

Inventor： Masashi Muraoka ,  Tomoharu Arai ,  Tetsuya Okado ,  Shingo Tode ,  Toyoki Fujihara

IPC: H01M2/26 ,  H01M10/0587 ,  H01M2/02

CPC classification number: H01M2/263 ,  H01M2/024 ,  H01M2/22 ,  H01M2/30 ,  H01M4/661 ,  H01M10/0431 ,  H01M10/052 ,  H01M10/0587 ,  H01M2220/20 ,  Y02E60/122

Abstract: A nonaqueous electrolyte secondary battery including a positive electrode collector electrically connected to a positive electrode plate, a negative electrode collector electrically connected to a negative electrode plate. At least one of the collectors includes a first-side base portion disposed near the sealing plate, and a first-side lead portion connected to one end portion of the first-side base portion and extending towards an electrode body. The first-side lead portion includes a first-side power generating element joining portion joined to a lateral side of the electrode body, and a first-side inclined portion inclined with respect to a thickness direction of the electrode body from the first-side power generating element joining portion towards an outer side in the thickness direction. A total weight of the electrode body and nonaqueous electrolyte contained in the electrode body ranges from 200 g or more to 500 g or less.

公开(公告)号：US20180097206A1

公开(公告)日：2018-04-05

申请号：US15711031

申请日：2017-09-21

Applicant: SANYO ELECTRIC CO., LTD.

Inventor： Tomoharu Arai ,  Tetsuya Okado ,  Shinichirou Yoshida ,  Masashi Muraoka ,  Toyoki Fujihara

IPC: H01M2/02 ,  H01M4/66 ,  H01M2/26

CPC classification number: H01M2/0217 ,  H01M2/0207 ,  H01M2/0277 ,  H01M2/0426 ,  H01M2/263 ,  H01M4/661 ,  H01M4/662 ,  H01M10/0436 ,  H01M10/0587

Abstract: A prismatic secondary battery includes a first current collector and a second current collector. The first current collector includes a first base disposed along a sealing plate. The second current collector includes a second base disposed along the sealing plate. A distance between an end portion of a wound electrode body facing the sealing plate and a surface of the first base facing the wound electrode body at an end portion of the first base on a central side in the longitudinal direction of the sealing plate is shorter than a distance between the end portion of the wound electrode body facing the sealing plate and a surface of the second base facing the wound electrode body at an end portion of the second base on the central side. An insulating buffer is disposed between the wound electrode body and the above surface of the first base.

公开(公告)号：US20220302511A1

公开(公告)日：2022-09-22

申请号：US17635846

申请日：2020-07-01

Applicant: SANYO Electric Co., Ltd.

Inventor： Tetsuya Okado ,  Masashi Muraoka ,  Tomoharu Arai ,  Atsushi Miyazaki

IPC: H01M10/44 ,  H01M10/04 ,  H01M10/0587 ,  H01M50/497

Abstract: In a method for producing a nonaqueous electrolyte secondary battery according to the present invention, a wound electrode body and a flat wound electrode body are formed by pressing. The flat wound electrode body and a cover member are connected to each other; a battery case and the cover member are integrated with each other; and a nonaqueous electrolyte solution is injected using a liquid injection port of the cover member, and the liquid injection port is sealed after the liquid injection, thereby forming a nonaqueous electrolyte secondary battery before inspection. Subsequently, the nonaqueous electrolyte secondary battery before inspection is pressed into a predetermined pressed state. A predetermined charge/discharge inspection is performed on the nonaqueous electrolyte secondary battery in the predetermined pressed state. If predetermined inspection specifications are satisfied in the predetermined charge/.discharge inspection, the nonaqueous electrolyte secondary battery is considered as a product that is ready for shipment.

公开(公告)号：US10511007B2

公开(公告)日：2019-12-17

申请号：US15684415

申请日：2017-08-23

Applicant: Sanyo Electric Co., Ltd.

Inventor： Masashi Muraoka ,  Tomoharu Arai ,  Tetsuya Okado ,  Shingo Tode ,  Toyoki Fujihara

IPC: H01M2/26 ,  H01M2/02 ,  H01M10/0587 ,  H01M2/22 ,  H01M4/66 ,  H01M10/04 ,  H01M2/30 ,  H01M10/052

Abstract: A nonaqueous electrolyte secondary battery including a positive electrode collector electrically connected to a positive electrode plate, a negative electrode collector electrically connected to a negative electrode plate. At least one of the collectors includes a first-side base portion disposed near the sealing plate, and a first-side lead portion connected to one end portion of the first-side base portion and extending towards an electrode body. The first-side lead portion includes a first-side power generating element joining portion joined to a lateral side of the electrode body, and a first-side inclined portion inclined with respect to a thickness direction of the electrode body from the first-side power generating element joining portion towards an outer side in the thickness direction. A total weight of the electrode body and nonaqueous electrolyte contained in the electrode body ranges from 200 g or more to 500 g or less.

公开(公告)号：US10593922B2

公开(公告)日：2020-03-17

申请号：US15850058

申请日：2017-12-21

Applicant: SANYO Electric Co., Ltd.

Inventor： Tetsuya Okado ,  Keisuke Minami ,  Masashi Muraoka ,  Tomoharu Arai ,  Toyoki Fujihara

IPC: H01M2/14 ,  H01M10/0587 ,  H01M2/10 ,  H01M2/02

Abstract: A battery pack includes a plurality of prismatic secondary batteries with spacers each interposed therebetween. The prismatic secondary batteries each include a flat wound electrode body that is formed by winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween; a prismatic outer body that houses the wound electrode body; and a sealing plate that seals an opening of the flat wound electrode body. The wound electrode body has a wound positive electrode core-exposed portion at one end portion and a wound negative electrode core-exposed portion at the other end portion. A positive electrode current collector is joined to the positive electrode core-exposed portion to form a positive electrode-joined portion, and a negative electrode current collector is joined to the negative electrode core-exposed portion to form a negative electrode-joined portion.

公开(公告)号：US10217973B2

公开(公告)日：2019-02-26

申请号：US15711031

申请日：2017-09-21

Applicant: SANYO ELECTRIC CO., LTD.

Inventor： Tomoharu Arai ,  Tetsuya Okado ,  Shinichirou Yoshida ,  Masashi Muraoka ,  Toyoki Fujihara

IPC: H01M2/02 ,  H01M2/26 ,  H01M4/66 ,  H01M2/04 ,  H01M10/04 ,  H01M10/0587

Abstract: A prismatic secondary battery includes a first current collector and a second current collector. The first current collector includes a first base disposed along a sealing plate. The second current collector includes a second base disposed along the sealing plate. A distance between an end portion of a wound electrode body facing the sealing plate and a surface of the first base facing the wound electrode body at an end portion of the first base on a central side in the longitudinal direction of the sealing plate is shorter than a distance between the end portion of the wound electrode body facing the sealing plate and a surface of the second base facing the wound electrode body at an end portion of the second base on the central side. An insulating buffer is disposed between the wound electrode body and the above surface of the first base.