公开(公告)号：US20190305287A1

公开(公告)日：2019-10-03

申请号：US16267764

申请日：2019-02-05

Applicant: SANYO Electric Co., Ltd.

Inventor： Yu Matsui ,  Takashi Hosokawa ,  Kyohei Kobayashi ,  Naotake Yoshida

IPC: H01M2/34 ,  H01M2/12 ,  H01M2/20

Abstract: A battery pack includes a battery unit including rectangular secondary batteries, each including a sealing plate and positive and negative electrode terminals attached to the sealing plate; a bus bar that connects the rectangular secondary batteries together in parallel; an insulating plate disposed between the sealing plates of the rectangular secondary batteries and the bus bar; and a short-circuit breaking portion that interrupts an electric conduction path between the rectangular secondary batteries connected in parallel by allowing each sealing plate to bulge outward in response to an internal pressure rise of the battery to push up the insulating plate and the bus bar. A portion of each sealing plate that bulges most protrudes outward by greater than or equal to 1.5 mm from an outer peripheral edge of the sealing plate when a pressure in the corresponding rectangular secondary battery reaches the operating pressure of a gas release valve.

公开(公告)号：US11145943B2

公开(公告)日：2021-10-12

申请号：US16267764

申请日：2019-02-05

Applicant: SANYO Electric Co., Ltd.

Inventor： Yu Matsui ,  Takashi Hosokawa ,  Kyohei Kobayashi ,  Naotake Yoshida

IPC: H01M2/34 ,  H01M2/12 ,  H01M2/20 ,  H01M50/578 ,  H01M50/317 ,  H01M50/502

Abstract: A battery pack includes a battery unit including rectangular secondary batteries, each including a sealing plate and positive and negative electrode terminals attached to the sealing plate; a bus bar that connects the rectangular secondary batteries together in parallel; an insulating plate disposed between the sealing plates of the rectangular secondary batteries and the bus bar; and a short-circuit breaking portion that interrupts an electric conduction path between the rectangular secondary batteries connected in parallel by allowing each sealing plate to bulge outward in response to an internal pressure rise of the battery to push up the insulating plate and the bus bar. A portion of each sealing plate that bulges most protrudes outward by greater than or equal to 1.5 mm from an outer peripheral edge of the sealing plate when a pressure in the corresponding rectangular secondary battery reaches the operating pressure of a gas release valve.

公开(公告)号：US20220384854A1

公开(公告)日：2022-12-01

申请号：US17786272

申请日：2020-12-15

Applicant: SANYO Electric Co., Ltd.

Inventor： Atsushi Kawamura ,  Daiki Watanabe ,  Yu Matsui ,  Shingo Tode

IPC: H01M10/0587 ,  H01M50/409 ,  H01M50/103

Abstract: A secondary battery configured so as to comprise: a plurality of positive electrodes each including a positive electrode core and a positive electrode active substance disposed on the positive electrode core; a plurality of negative electrodes each including a negative electrode core and a negative electrode active substance disposed upon the negative electrode core; at least one separator; and an adhesive coated so as to have a substantially constant area density on at least one side surface in the thickness direction of the separator. The secondary battery includes a laminated section in which the positive electrodes and the negative electrodes are alternately stacked, having the separator therebetween. The area of adhered sections adhered by the adhesive is greater on the outside in the lamination direction of the laminated section than on the inside in the lamination direction.