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Patent Searching and Data


Title:
SPRING MEMBER, FUEL CELL UNIT, FUEL CELL STACK, AND METHOD FOR MANUFACTURING FUEL CELL STACK
Document Type and Number:
WIPO Patent Application WO/2019/058902
Kind Code:
A1
Abstract:
[Problem] To provide a spring member, a fuel cell unit, a fuel cell stack, and a method for manufacturing the fuel cell stack, wherein degradation in power generation performance caused by creep deformation of a spring member can be prevented. [Solution] According to the present invention, a grid spring has: a first erect piece 130A which generates an elastic force that presses a separator 102 toward a power generation cell; and a second erect piece 130B which generates an elastic force independently of the first erect piece, wherein heating the grid spring reduces the spring constant of the first erect piece, and before being heated, the grid spring functions as a high-reaction force spring because the spring constant of the first erect piece is larger than the spring constant of the second erect piece, and after being heated, the grid spring functions as a low-reaction force spring because the spring constant of the first erect piece is smaller than the spring constant of the first erect piece before being heated.

Inventors:
YAGINUMA MOTOKI (JP)
TAJIMA NORIHIRO (JP)
KAWASAKI KOICHI (JP)
Application Number:
JP2018/031819
Publication Date:
March 28, 2019
Filing Date:
August 28, 2018
Export Citation:
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Assignee:
NISSAN MOTOR (JP)
NHK SPRING CO LTD (JP)
International Classes:
H01M8/0247; H01M8/0297; H01M8/2432; H01M8/12
Domestic Patent References:
WO2015012064A12015-01-29
Foreign References:
JP2012129108A2012-07-05
JP2015513199A2015-04-30
JP2009245622A2009-10-22
JP2013097982A2013-05-20
JP2017182981A2017-10-05
Other References:
See also references of EP 3686978A4
Attorney, Agent or Firm:
HATTA & ASSOCIATES (JP)
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