Title:
密閉型電気化学デバイス用防爆弁体
Document Type and Number:
Japanese Patent JP6925212
Kind Code:
B2
Abstract:
To provide an explosion-proof valve body for sealed electrochemical device in which variation of fracture strength of the valve body is suppressed, and dimensional accuracy of the attachment part is high.SOLUTION: Gas outlet in the sealing board of a sealed electrochemical device is blocked by an explosion-proof valve body 1, and when the internal pressure of the device increases, the explosion-proof valve body fractures to exhaust the gas. The explosion-proof valve body 1 is formed in such a shape that a cylindrical part 14 projects from a flat tabular part 11, by injection moulding of thermoplastic resin. The portion of the tabular part 11 located farther outside than the cylindrical part 14 is a collar part 12, and the explosion-proof valve body 1 is integrated with the sealing board of the device by the collar part 12. Multiple gate marks GR, GR are placed in the collar part 12 while spaced apart in the hoop direction, and a weld W is formed to substantially pass the center of a destruction part 13 of the tabular part 11, located farther inside than the cylindrical part 14.SELECTED DRAWING: Figure 2
Inventors:
Kiyofumi Hiroi
Application Number:
JP2017178439A
Publication Date:
August 25, 2021
Filing Date:
September 18, 2017
Export Citation:
Assignee:
Tigers Polymer Co., Ltd.
International Classes:
H01M50/342; H01G9/12
Domestic Patent References:
| JP2000315486A | ||||
| JP2008010476A | ||||
| JP2009064957A | ||||
| JP2005332613A |