公开(公告)号：US20210264813A1

公开(公告)日：2021-08-26

申请号：US17053818

申请日：2019-03-04

Applicant: HITACHI, LTD.

Inventor： Akihide TANAKA ,  Masanori MIYAGI ,  Kazumichi HOSOYA ,  Hiroki MURAKAMI ,  Masao SHIMIZU

IPC: G09B19/24 ,  G09B9/00

Abstract: A control device is provided with: a posture information storage unit that stores posture associated information associated with workability being an evaluation criterion at a time of a posture for each piece of posture information of an operator; a posture information detection unit that acquires posture information of the operator during work as current posture information; a posture information calculation unit that obtains, from the posture associated information, ideal posture information for making improvement on workability of the current posture information, obtained by referring to the posture associated information in the storage unit from the current posture information; and a posture information notification unit that notifies the ideal posture information obtained by the calculation unit as an improvement proposal.

公开(公告)号：US20150357632A1

公开(公告)日：2015-12-10

申请号：US14763320

申请日：2013-02-07

Applicant: HITACHI, LTD.

Inventor： Etsuko NISHIMURA ,  Akihide TANAKA ,  Katsunori NISHIMURA ,  Shuichi SUZUKI ,  Makoto OKAI ,  Masao SHIMIZU

IPC: H01M4/36 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/587

CPC classification number: H01M4/364 ,  H01M4/13 ,  H01M4/133 ,  H01M4/134 ,  H01M4/366 ,  H01M4/38 ,  H01M4/381 ,  H01M4/587 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/027 ,  Y02T10/7011

Abstract: An object of the present invention is to provide a lithium secondary battery having a negative electrode having a novel structure in which the metal content is increased as compared to the past and the capacity density of the negative electrode is increased, and the lithium occlusion capacity of the metal is not decreased by repeated charge and discharge. In order to achieve this object, the negative electrode active material for a lithium secondary battery is characterized by being composed of a mixture of graphite particles capable of occluding and emitting lithium ions and particles containing metal, wherein the average particle diameter of the particles containing metal during discharge is 1/2000 to 1/10 of that of the graphite particles, the graphite particles have an average particle diameter during discharge of 2 μm to 20 μm, and addition ratio by weight of the particles containing metal is 10% to 50%.

Abstract translation: 本发明的目的是提供一种锂二次电池，其具有负极，其具有与过去相比金属含量增加的新结构，并且负极的容量密度增加，并且锂的闭塞能力 金属不会因反复充放电而降低。 为了达到上述目的，锂二次电池用负极活性物质的特征在于，由能够吸留锂离子的石墨粒子和含有金属的粒子的混合物构成，其中含有金属的粒子的平均粒径 在排出时为石墨颗粒的1/2000〜1/10，石墨粒子的放电平均粒径为2μm〜20μm，含金属的添加重量比为10〜50％ 。