CN-224232652-U - Novel metal bipolar plate of hydrogen fuel cell

Abstract

The utility model discloses a novel metal bipolar plate of a hydrogen fuel cell, which comprises a bipolar plate main body; according to the utility model, through the inlet air of the circulation inlet, gas can flow into the diversion groove at first, the gas can be diverted by the bumps arranged in the diversion groove in a staggered manner, the gas is prevented from advancing along one direction under the flow velocity, the gas in the flow channel flows back into the flow channel after being diverted by the bumps, and the reaction water and residual gas generated after the reaction of the gas and the exchange membrane enter the flow diverting groove along with the flow of the gas flow and are discharged from the flow outlet.

Inventors

• ZHANG ZEPENG
• CHEN ZEWEI
• LI CHAO

Assignees

• 如皋流体有界科技有限公司

Dates

Publication Date

20260512

Application Date

20250407

Claims (4)

1. 1. A novel metal bipolar plate of a hydrogen fuel cell comprises a bipolar plate main body (1), and is characterized in that a clamping groove (2) is formed in the bipolar plate main body (1), a plurality of ridges (9) are fixedly arranged in the bipolar plate main body (1), a flow channel (8) is formed between the two ridges (9), a circulation inlet (3) and a circulation outlet (6) are respectively formed in two sides of the flow channel (8), a shunt groove (4) is formed in one side of the circulation inlet (3), and a converging groove (7) is formed in one side of the circulation outlet (6); the side of the flow channel (8) close to the circulation inlet (3) is higher than the side of the flow channel (8) close to the circulation outlet (6), and the side of the ridge (9) close to the circulation inlet (3) is higher than the side of the ridge (9) close to the circulation outlet (6).
2. 2. A novel hydrogen fuel cell metal bipolar plate according to claim 1, wherein the two ends of the flow channel (8) are respectively communicated with the flow dividing groove (4) and the flow converging groove (7), and the flow inlet (3) and the flow outlet (6) penetrate through the bipolar plate main body (1).
3. 3. The novel metal bipolar plate for hydrogen fuel cells of claim 1, wherein a plurality of rows of protruding blocks (5) are fixedly arranged in the vertical direction in the shunt grooves (4), and each row of protruding blocks (5) are arranged in a staggered mode.
4. 4. The novel metal bipolar plate for hydrogen fuel cells of claim 1, wherein the cross section of the clamping groove (2) is in an inverted trapezoid shape, and the bottom opening size of the clamping groove (2) is smaller than the top opening size.

Description

Novel metal bipolar plate of hydrogen fuel cell Technical Field The utility model relates to the technical field of hydrogen fuel cells, in particular to a novel metal bipolar plate of a hydrogen fuel cell. Background Bipolar plates are key components in electrochemical devices, particularly in the fields of fuel cells and electrolyzers, and their primary functions include current conduction, isolating cells, directing fluid flow, and heat dissipation. The bipolar plates are mainly made of graphite bipolar plates, metal bipolar plates and composite bipolar plates. The graphite bipolar plate has good conductivity and corrosion resistance, but has large weight, relatively complex machining, high strength, light weight, good conductivity and thermal conductivity, is easy to generate electrochemical corrosion and needs surface modification treatment, and the composite bipolar plate is composed of two or more materials, has the advantages of high conductivity of graphite materials and high toughness of high polymer materials, and is a hot spot for research and development at present. The utility model provides a novel hydrogen fuel cell metal bipolar plate of bulletin number CN215299306U, relates to the field of hydrogen fuel cell, including the board body, be equipped with a plurality of flow grooves on the board body, the diapire of flow groove is the diapire of declivity gradually, has the effect that keeps fuel cell performance. According to the device, the bottom wall of the flow grooves is gradually inclined downwards, but the flow grooves are formed by a plurality of meandering spliced bipolar plates, the bipolar plates are generally vertically installed, the two ends of the spliced flow grooves are high, the middle is low, when the content of hydrogen fuel gas is insufficient, the gas flow rate is reduced, produced reaction water is deposited in a low-lying area between the flow grooves and cannot be carried out by flowing gas, so that the fuel cell is easy to be reduced in performance under low gas content, and therefore, the novel hydrogen fuel cell metal bipolar plate is required to meet the demands of people. Disclosure of utility model The utility model aims to provide a novel metal bipolar plate of a hydrogen fuel cell, which solves the problems in the background technology. The novel hydrogen fuel cell metal bipolar plate comprises a bipolar plate main body, wherein a clamping groove is formed in the bipolar plate main body, a plurality of ridges are fixedly arranged in the bipolar plate main body, a flow channel is formed between the two ridges, two sides of the flow channel are respectively provided with a circulation inlet and a circulation outlet, one side of the circulation inlet is provided with a shunt groove, and one side of the circulation outlet is provided with a flow converging groove; the side of the flow channel close to the circulation inlet is higher than the side of the flow channel close to the circulation outlet, and the side of the ridge close to the circulation inlet is higher than the side of the ridge close to the circulation outlet. Preferably, the two ends of the flow channel are respectively communicated with the shunt groove and the confluence groove, and the circulation inlet and the circulation outlet penetrate through the bipolar plate main body. Preferably, a plurality of rows of protruding blocks are fixedly arranged in the vertical direction in the shunt groove, and each row of protruding blocks are arranged in a staggered mode. Preferably, the cross section of the clamping groove is in an inverted trapezoid shape, and the bottom opening size of the clamping groove is smaller than the top opening size. Compared with the prior art, the utility model has the beneficial effects that: (1) According to the utility model, air is introduced through the circulation inlet and flows into the diversion groove, the bumps are arranged in the diversion groove in a staggered manner to divert the air, so that the air is prevented from advancing along one direction under the flow speed, the air flows back into the flow channel after being diverted through the bumps, reaction water and residual air generated after the reaction of the air in the flow channel and the exchange membrane enter the flow diversion groove along with the flow of the air flow and are discharged from the circulation outlet, and as the end of the flow channel, which is close to the circulation outlet, is lower, when the bipolar plate main body is vertically arranged, the reaction water can flow into the flow diversion groove more easily, so that the reaction water can be discharged under lower air flow, and the reaction effect is ensured. (2) Be equipped with the draw-in groove of reverse trapezoidal in the bipolar plate main part, corresponding on the diffusion layer of laminating rather than the installation when production because of having the trapezoidal arch of the same profile, in through the protruding