Fuel cell bipolar metal plate with enhanced sealing property

Abstract

The invention discloses a fuel cell bipolar metal plate with an enhanced sealing property. The fuel cell bipolar metal plate comprises a bipolar plate which is formed by an oxygen polar plate and a hydrogen polar plate which are connected into a whole in a bonding or welding manner; an oxygen gum line frame on the oxygen polar plate and the oxygen polar plate are of an integrated structure, namely, the oxygen gum line frame is pressed and molded together with a runner and a common opening on the oxygen polar plate; and a hydrogen gum line frame on the hydrogen polar plate and the hydrogen polar plate are of a split structure, namely, the hydrogen gum line frame and the hydrogen polar plate are two mutually independent structures, and the hydrogen gum line frame is adhered to the hydrogen polar plate. The fuel cell metal bipolar plate has the beneficial effects that the entire strength and the entire smoothness of the bipolar metal plate are improved; the matching and the alignment in the pile assembling process are facilitated; and the sealing stability of the bipolar metal plate is facilitated, and the reliability of a metal plate pile in the operating process is facilitated, and further the service life of the pile is prolonged.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to the fuel cell bipolar plate sealing technology. Background technique [0002] A fuel cell is an electrochemical power generation device, which is different from a battery in the conventional sense. It can directly convert chemical energy into electrical energy isothermally and electrochemically. Commonly used fuels for fuel cells are hydrogen, reformed gas, natural gas and purified gas, etc., and commonly used oxidants are air or pure oxygen. If the fuel cell is not well sealed, it will directly lead to the mixing of fuel and oxidant, which can easily cause an explosion. Therefore, the sealing design in the field of fuel cells is very important. [0003] In the prior art, the sealing form of the oxygen plate and the hydrogen plate of the metal bipolar plate of the fuel cell is sealed with a glue groove and a sealing glue line, and it is still developing towards the integrat...

AI Technical Summary

Problems solved by technology

The disadvantages of the existing technology are: the sealing glue line / bipolar plate belongs to the contact between different materials, and the sealing effect is affected; the glue line needs to be injection molded, the cost is high, and glue is wasted; the overall strength and overall flatness of the bipolar plate It also affects the matching and alignment of the stack assembly

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