Bipolar plate for electrolyser comprising a single wall

Details Bipolar plate for electrolyser comprising a single wall Bipolar plate for electrolyser comprising a single wall

2005-11-18

2010-11-30

Bell, Bruce F (Department: 1795)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C204S255000, C204S253000, C429S006000, C429S006000, C429S006000, C429S006000, C429S006000

Reexamination Certificate

active

07842172

ABSTRACT:
It is described a bipolar plate consisting of a single wall and a perimetrical sealing frame obtained by folding and provided with a planar abutment surface for the frame-to-wall welding. The wall is further provided with projections on one face thereof preferably obtained by moulding, and with supports on the other face consisting of sheet strips housed in the recesses formed by the concave part of the projections. The projections substantially extend along the entire length of the bipolar plate. The projections and supports are connected to electrodes or current distributors. The projections, the supports, the single wall and the perimetrical frame are made of the same metal or alloy. The electrode or current distributor supported by the projections, the same projections and the supports are welded together by a single pass of arc-welding or preferably laser-welding. The electrode or current distributor connected to the support and the support themselves are mutually welded by a subsequent pass of arc-welding or preferably laser-welding. The welding between wall and perimetrical frame on the abutment surface of the frame is carried out by diode-laser technique, allowing to obtain a robust connection but without a complete melting of the sheet, thereby eliminating the risk of process fluid leakage to the external environment.

REFERENCES:
patent: 2717872 (1955-09-01), Zdansky
patent: 4518113 (1985-05-01), Pellegri
patent: 4726891 (1988-02-01), Beaver
patent: 6998030 (2006-02-01), Oldani et al.
patent: 2004/0216994 (2004-11-01), Oldani et al.
patent: WO 02/068718 (2002-09-01), None

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