发明名称 |
Method of fabricating a bipolar plate assembly |
摘要 |
A method of fabrication is adapted to weld paired metal plates, particularly fuel cell bipolar plates, using a partial vacuum to hold the paired metal plates together during the welding process. Each bipolar plate has a plurality of contact surfaces for joining the paired metal plates. The contact surfaces of a first plate are co-aligned with contact surfaces of a second plate. An outer perimeter and a plurality of reactant gas channels and ports of each plate pair are sealed to form a sealable interior volume. A partial vacuum is drawn in the interior volume to clamp each plate pair together at the contact surfaces and a weld joint is made between at least a plurality of the contact surfaces. Laser welding is preferably used for its ability to fuse the contact surfaces together without perforating the plates and thereby losing the partial vacuum.
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申请公布号 |
US2005202303(A1) |
申请公布日期 |
2005.09.15 |
申请号 |
US20050127484 |
申请日期 |
2005.05.12 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
SCHLAG HARALD |
分类号 |
B23K26/24;(IPC1-7):H01M8/02;B23K31/02 |
主分类号 |
B23K26/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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