H - Electricity – 01 – M
Patent
H - Electricity
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M
H01M 8/24 (2006.01) G01R 31/36 (2006.01) H01M 4/86 (2006.01) H01M 4/88 (2006.01) H01M 4/92 (2006.01) H01M 4/96 (2006.01) H01M 8/04 (2006.01) H01M 8/10 (2006.01) H01M 8/02 (2006.01)
Patent
CA 2423545
The durability of a polymer electrolyte fuel cell is very significantly improved by using a tightening pressure of about 2 to 4 kgf/cm2 of area of electrode; or a tightening pressure of about 4 to 8 kgf/cm2 of contact area between electrode and separator plate; or by selecting a value not exceeding about 1.5 mS/cm2 for the short-circuit conductivity attributed to the DC resistance component in each unit cell; or by selecting a value not exceeding about 3 mA/cm2 for the hydrogen leak current per area of electrode of each MEA. Further, in a method of manufacturing or an inspection method for a polymer electrolyte fuel cell stack, fuel cells having high durability can be efficiently manufactured by removing such MEAs or unit cells using such MEAs or such cell stacks having short-circuit conductivity values and/or hydrogen leak current values exceeding predetermined values, respectively.
Hase Nobuhiro
Hatoh Kazuhito
Kanbara Teruhisa
Kobayashi Susumu
Kusakabe Hiroki
Borden Ladner Gervais Llp
Matsushita Electric Industrial Co. Ltd.
Panasonic Corporation
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