A rolling formation based manufacture method for metal bipolar plate of proton exchange membrane fuel cell

A proton exchange membrane and metal bipolar plate technology, which is applied to fuel cell parts, battery electrodes, manufacturing tools, etc., can solve the problems of restricting the realization of mass production, extremely high processing accuracy requirements, and reduced processing efficiency. Achieve the effects of reducing manufacturing errors, precision forming, and improving quality

Inactive Publication Date: 2008-10-01
SHANGHAI JIAOTONG UNIV
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  • Claims
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Problems solved by technology

However, due to the extremely precise size characteristics of the flow field channel of the polar plate, its design size is as small as 500 microns in width, 300 microns in depth, and 500 microns in interval. The scale effect requires extremely high processing accuracy
Therefore, the repositioning of the processing mold in the multi-station in the processing process will inevitably cause large manufacturing errors, and its processing efficiency will inevitably decrease, which limits the realization of mass production.

Method used

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  • A rolling formation based manufacture method for metal bipolar plate of proton exchange membrane fuel cell
  • A rolling formation based manufacture method for metal bipolar plate of proton exchange membrane fuel cell
  • A rolling formation based manufacture method for metal bipolar plate of proton exchange membrane fuel cell

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Embodiment 1

[0024] In this embodiment, in order to adapt to the structural characteristics of the roller mold and reduce the difficulty of mold processing, an interdigitated bipolar plate structure is adopted. The plate material used is 0.1mm 316 stainless steel sheet. The width of the reaction gas flow field of the plate is designed to be 1 mm, the depth is 0.8 mm, the channel spacing (boss) is 1 mm, and the gas channels are designed to be 2 mm wide and 0.8 mm deep. The air inlet and outlet are designed as square holes of 20mm×20mm, and the inlet and outlet of coolant are both square holes of 10mm×10mm. Around the reaction gas flow field area, a sealing groove with a width and a depth of 0.5 mm is designed. The two unipolar plates are completely symmetrical in design and have the same structural configuration.

[0025]According to the structure configuration of the pole plate, the roller pairs of each process are generated through mapping processing, including the roller pair of unipol...

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Abstract

The related metal bipolar plate manufacture method for proton exchange film fuel cell comprises: based on rolling shape, manufacturing all roller couples for target form included single-plate rolling roller couple, bipolar plate connection roller couple and the shaping roller couple; using single-plate rolling roller couple to roll the plate from top and bottom positions simultaneously; using bipolar plate connection roller couple to connect two independent single plates; then, using the shaping roller couple for shaping; finally, cutting and blanking. This invention can reduce both cost and manufacture error.

Description

technical field [0001] The invention relates to a manufacturing method in the technical field of fuel cells, in particular to a method for manufacturing a metal bipolar plate of a proton exchange membrane fuel cell based on roll forming. Background technique [0002] Proton exchange membrane fuel cells are expected to replace conventional engines as the main power source for future vehicles due to their cleanliness, high efficiency and renewable energy. The structure of the proton exchange membrane fuel cell is mainly composed of bipolar plates, proton exchange membranes, catalysts, etc.; among them, MEA is the core of the fuel cell, and its manufacturing cost accounts for 43% of the total cost; and the bipolar plate is an important component of the battery Part of it plays the role of current collection, gas distribution, water management, and heat management in the fuel cell. Its weight accounts for more than 80% of the total weight of the fuel cell stack, and its manufact...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M8/02B23P13/00B21D13/04B21D39/02B21D37/00B21D28/02
CPCY02E60/50Y02P70/50
Inventor 倪军来新民蓝树槐林忠钦彭林法刘冬安
Owner SHANGHAI JIAOTONG UNIV
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