Title:
封口板
Document Type and Number:
Japanese Patent JP7025861
Kind Code:
B2
Abstract:
To provide a sealing plate having an explosion-proof valve whose opening pressure can be set easily, and whose groove will not be not ruptured by a repeated stress before reaching an opening pressure.The explosion-proof valve 22 comprises: a thin plate portion 24 thinner than a plate 19; a valve portion 25 formed by partially projecting the thin plate portion 24 in a thickness direction to enhance a bending rigidity; and a groove 29 drawn as a boundary between the valve portion 25 and the thin plate portion 24 to serves as a score line. The groove 29 does not enclose the valve portion 25 completely and end portions 34, 35 of the groove 29 are isolated away from each other. The end portions 34, 35 are aligned with a straight line 37 passing through the valve portion 25. A folding line 38 extends outside the valve portion 25 in parallel to the straight line 37 on an opposite side to a center 50. A rupturable portion 31 that is ruptured after the groove is ruptured is formed between the straight line 37 and the folding line 38. The valve portion 25 is bent along the folding line 38 to open the explosion-proof valve 22 when the rupturable portion 31 is ruptured after the groove 29 is ruptured.
Inventors:
Masahiro Shiotani
Horie Yasutomo
Yusuke Yamawaki
Horie Yasutomo
Yusuke Yamawaki
Application Number:
JP2017159764A
Publication Date:
February 25, 2022
Filing Date:
August 22, 2017
Export Citation:
Assignee:
Daiwa Seikan Co., Ltd.
International Classes:
H01M50/15; H01M50/147; H01M50/342
Domestic Patent References:
| JP2012059496A | ||||
| JP2005071836A | ||||
| JP2005108584A | ||||
| JP2015069716A |
Attorney, Agent or Firm:
Watanabe
Kikuhiko Nakamoto
Kikuhiko Nakamoto