Fuel cell with bipolar plates having micro channels and its manufacturing method
OwnerShuo-Jen Lee, Yu-Pang Chen +1inventors
InventorsShuo-Jen Lee, Yu-Pang Chen, Ching-Han Huang
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Abstract
A fuel cell with bipolar plates having micro channels and its manufacturing method are disclosed. The structure of this fuel cell includes a pair of bipolar plates and a catalytic portion. The bipolar plate has a gas inlet, a gas outlet, a main channel, several blocking portions, and many micro channels formed on the blocking portions and connecting two adjacent sections of the main channel. The manufacturing method includes (1) preparing step, (2) first-layer structure manufacturing step, (3) second-layer structure manufacturing step, and (4) complete step. It can increase the gas contacting area. It can drain off water more effectively. It is suitable for mass production.
Claims15
A fuel cell with bipolar plates having micro channels comprising a pair of bipolar plates and an catalytic portion therebetween;
- each bipolar plate including:
- a gas inlet;
- a gas outlet;
- a main channel communicating said gas inlet and said gas outlet, said main channel having a first cross-sectional area, said main channel having several sections;
- a plurality of blocking portions by two sides of each section of said main channel;
- a plurality of micro channels formed on said blocking portions and connecting two adjacent sections of said main channel, each micro channel having a second cross-sectional area, said second cross-sectional area being smaller than said first cross-sectional area.
A manufacturing method of fuel cell with bipolar plates having micro channels comprising:
- (1) preparing step:
- to prepare a base plate and to form a first photoresist layer on the base plate;
- (2) first-layer structure manufacturing step:
- to form a second photoresist layer on said first photoresist layer;
- to place a mask having molding holes on said second photoresist layer and then to apply UV light to form molding cavities;
- to remove the mask;
- to apply UV light again to the first photoresist layer through the molding cavities and then to form the molding slots;
- Next, to form a first-layer structure by the molding slots and the molding cavities, and finally to remove the first photoresist layer and the second photoresist layer;
- (3) second-layer structure manufacturing step:
- to use the first-layer structure as another base plate and to repeat the steps mentioned in the first-layer structure manufacturing step;
- (4) complete step:
- after finishing the second-layer structure manufacturing step on the first-layer structure, a second-layer structure being formed on the first-layer structure.
A manufacturing method of fuel cell with bipolar plates having micro channels comprising:
- (1) preparing step:
- to prepare a base plate and to form a first photoresist layer on the base plate;
- (2) first-layer structure manufacturing step:
- to form a second photoresist layer on said first photoresist layer;
- to place a mask having molding holes on said second photoresist layer and then to apply UV light to form molding cavities;
- to remove the mask;
- to apply UV light again to the first photoresist layer through the molding cavities and then to form the molding slots;
- Next, to form a first-layer structure by the molding slots and the molding cavities, and finally to remove the first photoresist layer and the second photoresist layer;
- (3) second-layer structure manufacturing step:
- to use the first-layer structure as another base plate and to repeat the steps mentioned in the first-layer structure manufacturing step;
- (4) complete step:
- after finishing the second-layer structure manufacturing step on the first-layer structure, a second-layer structure being formed on the first-layer structure;
- (5) manufacturing step:
- by using a mold to produce a product of fuel cell with bipolar plates having micro channels.
Dependencies are inferred from the claim text.