公开(公告)号：US10535851B2

公开(公告)日：2020-01-14

申请号：US16013229

申请日：2018-06-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomohiko Yokoyama ,  Yoshiyuki Muraoka ,  Takahiro Fukuoka ,  Kyosuke Miyata

IPC: H01M2/12 ,  H01M10/04 ,  H01M2/08 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2/26 ,  H01M4/525 ,  H01M4/02

Abstract: A cylindrical lithium ion battery in which an electrode group formed by winding a positive electrode and a negative electrode is housed in a battery case is disclosed. A sealing plate seals an opening of the battery case. An insulating plate having a plurality of openings is provided on a side of the electrode group closer to the sealing plate. The plurality of openings include a first hole with a largest opening area, and a plurality of second holes with opening areas smaller than the opening area of the first hole. An opening ratio of the first hole is 12% or more and 40% or less; a sum of opening ratios of the second holes is 0.3% or more and 10% or less; and a total opening ratio of all the openings is 20% or more and 50% or less.

公开(公告)号：US20150155535A1

公开(公告)日：2015-06-04

申请号：US14411891

申请日：2013-07-02

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Masato Fujikawa ,  Akihiro Maeda ,  Tomohiko Yokoyama ,  Keisuke Shimizu

IPC: H01M2/12

CPC classification number: H01M2/1223 ,  H01M2/022 ,  H01M2/0413 ,  H01M2/1241 ,  H01M2/30

Abstract: Disclosed is a sealed secondary battery including: a case having an opening, and housing an electrode group including a positive electrode, a negative electrode, and a separator; an insulating plate disposed near the opening and between the opening and the electrode group within the case; and a sealing unit sealing the opening of the case. The sealing unit includes a first conductor plate, a second conductor plate, and a valve mechanism interposed therebetween. The first conductor plate is disposed on the exterior side of the case, and the second conductor plate is disposed on the interior side of the case. The first conductor plate has a first hole having an opening area S1 (mm2), the insulating plate has a second hole having an opening area S2 (mm2), and S1 and S2 satisfy the inequality: (3/t+12) mm2≦S1

Abstract translation: 公开了一种密封二次电池，其包括：具有开口的壳体，并且容纳包括正极，负极和隔膜的电极组; 绝缘板，设置在所述开口附近并且在所述壳体内的所述开口和所述电极组之间; 以及密封壳体的开口的密封单元。 密封单元包括第一导体板，第二导体板和插入其间的阀机构。 第一导体板设置在壳体的外侧，第二导体板设置在壳体的内侧。 第一导体板具有开口面积S1（mm2）的第一孔，绝缘板具有开口面积S2（mm2）的第二孔，S1和S2满足不等式：（3 / t + 12）mm2＆nlE; S1

公开(公告)号：US20230163408A1

公开(公告)日：2023-05-25

申请号：US17917167

申请日：2021-02-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuji Otake ,  Takahiro Takahashi ,  Tomohiko Yokoyama

IPC: H01M50/383 ,  H01M50/186 ,  H01M10/0587 ,  H01M10/04

CPC classification number: H01M50/383 ,  H01M50/186 ,  H01M10/0587 ,  H01M10/0422

Abstract: This cylindrical battery comprises an electrode body in which a positive electrode and a negative electrode are wound with a separator interposed therebetween, an electrolyte, a bottomed cylindrical outer can accommodating the electrode body and the electrolyte, and a sealing body blocking an opening portion of the outer can, wherein: the sealing body has a cap disposed in the outermost portion of the sealing body; the cap includes a protruding portion formed in a central portion thereof; the protruding portion includes a top surface portion and a side wall portion; and a plurality of independent venting ports are formed in the top surface portion and the side wall portion.

公开(公告)号：US10026938B2

公开(公告)日：2018-07-17

申请号：US15268093

申请日：2016-09-16

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomohiko Yokoyama ,  Yoshiyuki Muraoka ,  Takahiro Fukuoka ,  Kyosuke Miyata

IPC: H01M2/12 ,  H01M10/04 ,  H01M2/08 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2/26 ,  H01M4/525 ,  H01M4/02

Abstract: A cylindrical lithium ion battery in which an electrode group formed by winding a positive electrode and a negative electrode is housed in a battery case is disclosed. A sealing plate seals an opening of the battery case. An insulating plate having a plurality of openings is provided on a side of the electrode group closer to the sealing plate. The plurality of openings include a first hole with a largest opening area, and a plurality of second holes with opening areas smaller than the opening area of the first hole. An opening ratio of the first hole is 12% or more and 40% or less; a sum of opening ratios of the second holes is 0.3% or more and 10% or less; and a total opening ratio of all the openings is 20% or more and 50% or less.