公开(公告)号：US20180108950A1

公开(公告)日：2018-04-19

申请号：US15725401

申请日：2017-10-05

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Koji TORITA ,  Yukinobu MIYAMURA ,  Hiroaki IMANISHI

IPC: H01M10/42 ,  H01M2/02

Abstract: A secondary battery includes a reverse plate formed using a conductive material and provided in a case, and a fixing member formed using an elastically deformable material and joined to the reverse plate. When an internal pressure in the case is increased, the reverse plate deforms in response to the internal pressure, to thereby electrically connect a positive electrode terminal and a negative electrode terminal. With the increase in the internal pressure, the fixing member elastically deforms from a state where it is inserted into the through hole, exits the through hole and is fixed between the reverse plate and the case. The reverse plate in the deformed state is supported by the fixed fixing member.

公开(公告)号：US20170092951A1

公开(公告)日：2017-03-30

申请号：US15273981

申请日：2016-09-23

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroya UMEYAMA ,  Koji TORITA ,  Akihiro TANIGUCHI ,  Shuji TSUTSUMI ,  Tatsuya HASHIMOTO

IPC: H01M4/587 ,  H01M10/0587 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/587 ,  H01M4/133 ,  H01M4/625 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2004/027 ,  H01M2220/20 ,  Y02T10/7011

Abstract: The present teaching provides a lithium ion secondary battery particularly improved in durability against high-rate charging/discharging. The lithium ion secondary battery of the present teaching includes, in the negative electrode active material layer, a negative electrode active material formed of a graphite type carbon material having a graphite structure in at least a part thereof, and a conductive carbon material, which is different from the graphite type carbon material and is formed of a conductive amorphous carbon. The negative electrode active material has a bulk density of 0.5 g/cm3 or more and 0.7 g/cm3 or less, and a BET specific surface area of 2 m2/g or more and 6 m2/g or less. The conductive carbon material has a bulk density of 0.4 g/cm3 or less, and a BET specific surface area of 50 m2/g or less.