公开(公告)号：US20190115585A1

公开(公告)日：2019-04-18

申请号：US16157644

申请日：2018-10-11

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Akira TSUJIKO ,  Ryosuke OHSAWA ,  Kaoru INOUE ,  Akihiro TANIGUCHI ,  Keisuke OHARA

IPC: H01M4/133 ,  H01M4/36 ,  H01M10/0525

Abstract: The negative electrode plate includes at least a negative electrode composite material layer. The negative electrode composite material layer has a density of 1.5 g/cm3 or more. The negative electrode composite material layer contains at least first particles, second particles and a binder. The first particles contain graphite particles and an amorphous carbon material. The amorphous carbon material is coated on the surface of each graphite particle. The second particles are made of silicon oxide. The ratio of the second particles to the total amount of the first particles and the second particles is 2 mass % or more to 10 mass % or less. The negative electrode plate has a spring constant of 700 kN/mm or more to 3000 kN/mm or less.

公开(公告)号：US20170346138A1

公开(公告)日：2017-11-30

申请号：US15531265

申请日：2015-11-20

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroya UMEYAMA ,  Yukiyoshi UENO ,  Kaoru INOUE ,  Hideki SANO

IPC: H01M10/0587 ,  H01M10/0525 ,  H01M10/04

Abstract: A nonaqueous electrolyte secondary battery includes a wound electrode assembly in which a positive electrode having, at its one end in a width direction, a positive electrode exposed portion provided without a positive electrode mixture layer on a positive electrode current collector and a negative electrode are wound together, with a separator interposed therebetween. The positive electrode exposed portion protrudes outward in an axial direction of the wound electrode assembly relative to the separator and the negative electrode at one end in the axial direction of the wound electrode assembly. The negative electrode exposed portion protrudes outward in the axial direction of the wound electrode assembly relative to the separator and the positive electrode at the other end in the axial direction. The positive electrode exposed portion has a cutout portion at least in an outermost circumferential portion of the positive electrode.

公开(公告)号：US20160308214A1

公开(公告)日：2016-10-20

申请号：US15081190

申请日：2016-03-25

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroya UMEYAMA ,  Kaoru INOUE ,  Tatsuya HASHIMOTO

IPC: H01M4/62 ,  H01M4/139 ,  H01M4/04

CPC classification number: H01M4/622 ,  H01M4/049 ,  H01M4/13 ,  H01M4/139

Abstract: A nonaqueous electrolyte secondary battery includes: a negative electrode current collector core; and a negative electrode mixture layer that is formed on the negative electrode current collector core. The negative electrode mixture layer contains a diene rubber binder. A section of the negative electrode mixture layer in a thickness direction is divided into a first region, a second region, and a third region from a negative electrode current collector core side by trisecting the negative electrode mixture layer in the thickness direction. An abundance of the diene rubber binder in the second region is greater than an abundance of the diene rubber binder in the first region. The third region contains the diene rubber binder having an oxidized carbon-carbon double bond.

Abstract translation: 非水电解质二次电池包括：负极集电体芯; 以及形成在负极集电体芯上的负极合剂层。 负极混合物层含有二烯橡胶粘合剂。 通过在负极集电体芯层的厚度方向上分层负极复合层，将负极复合层的厚度方向的一部分从负极集电体芯侧分割为第一区域，第二区域和第三区域。 第二区域中二烯橡胶粘合剂的丰度大于第一区域中的二烯橡胶粘合剂的丰度。 第三区域含有具有氧化碳 - 碳双键的二烯橡胶粘合剂。