Fuel cell stack with flow distribution function

A fuel cell stack and flow distribution technology, which is applied to fuel cells, circuits, electrical components, etc., can solve the problems of uneven airflow, high flow rate, and reduced pressure drop in the fuel cell stack system, and achieve effective airflow distribution. Effect

Pending Publication Date: 2021-12-31
深圳市氢瑞燃料电池科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, the present invention provides a fuel cell stack with a flow distribution function, aiming to solve the problem that when the air inlet of the existing fuel cell stack adopts a direct-flow channel design, the air flow generates a vortex structure at the blind end of the direct-flow channel, resulting in flow The flow mode of the air flow in the channel changes from laminar flow to turbulent flow; and the air inlet of the straight channel will have low air pressure and high flow velocity near the inlet during the intake process; high air pressure and low flow velocity far away from the inlet. As a result, there are large differences in the airflow velocity and pressure entering different single cells, and the air flow in different single cells is uneven, resulting in a decrease in the overall pressure drop of the fuel cell stack system

Method used

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  • Fuel cell stack with flow distribution function
  • Fuel cell stack with flow distribution function
  • Fuel cell stack with flow distribution function

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Experimental program
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Effect test

Embodiment 1

[0033] Such as Figure 1 to Figure 3 As shown, a fuel cell stack with a flow distribution function proposed by the embodiment of the present invention includes an air inlet pipe 1, an air outlet pipe 2, and a battery stack arranged between the air inlet pipe 1 and the air outlet pipe 2 Body 3; the air inlet pipe 1 and the air outlet pipe 2 are arranged in parallel; the end face of the open end 11 of the air inlet pipe 1 extends from one end of the battery cell stack body 2, and the end face of the blind end 12 of the air inlet pipe 1 extends The other end of the battery stack body 3; the battery stack body 3 includes a plurality of single cells 31 arranged side by side; a first connecting bridge is provided between the inlet of the single cells 31 and the air intake pipe 1 4 A second connection bridge 5 is provided between the outlet of the single battery 31 and the outlet pipe 2.

[0034] In this embodiment, the first connecting bridge 4 and the inlet end for connecting the ai...

Embodiment 2

[0042] Such as Figure 1 to Figure 3 As shown, a fuel cell stack with a flow distribution function proposed by the embodiment of the present invention includes an air inlet pipe 1, an air outlet pipe 2, and a battery stack arranged between the air inlet pipe 1 and the air outlet pipe 2 Body 3; the air inlet pipe 1 and the air outlet pipe 2 are arranged in parallel; the end face of the open end 11 of the air inlet pipe 1 extends from one end of the battery cell stack body 2, and the end face of the blind end 12 of the air inlet pipe 1 extends The other end of the battery stack body 3; the battery stack body 3 includes a plurality of single cells 31 arranged side by side; a first connecting bridge is provided between the inlet of the single cells 31 and the air intake pipe 1 4; A second connecting bridge 5 is provided between the outlet of the single battery 31 and the outlet pipe 2 .

[0043] In this embodiment, the first connecting bridge 4 and the inlet end for connecting th...

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Abstract

The invention provides a fuel cell stack with a flow distribution function. The fuel cell stack comprises an air inlet pipe, an air outlet pipe and a cell stack body arranged between the air inlet pipe and the air outlet pipe; the end face of the opening end of the air inlet pipe extends out of one end of the cell stack body, and the end face of the blind end of the air inlet pipe extends out of the other end of the cell stack body. A first flow channel and a second flow channel are arranged in the air inlet pipe in parallel, and a first through hole is formed in the blind end of the air inlet pipe to communicate the first flow channel with the second flow channel, so that airflow is prevented from generating a vortex structure at the blind end of the air inlet pipe; and meanwhile, the distribution of the airflow in the fuel cell stack can be adjusted by regulating and controlling the airflow ratio of the first flow channel to the second flow channel, so that the aim of effectively distributing the airflow is fulfilled. By arranging a backflow channel in the air inlet pipe, airflow at the blind end of the air inlet pipe can be effectively guided out and supplemented to the opening end of the air inlet pipe, and the situation that the airflow generates a vortex structure at the blind end of the air inlet pipe is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell stack with flow distribution function. Background technique [0002] Faced with the increasingly stringent exhaust emission standards in China and the world and the energy crisis in the future, major automakers are developing new low-emission energy technologies to adapt to this development trend. Among them, fuel cell vehicles are currently one of the fields that major car companies are vigorously researching and developing. The main part of the fuel cell is composed of multiple single cell stacks with the same structure. The batteries are connected in series to meet the rated voltage required by the working conditions. As a place for the hydrogen-oxygen reaction, the amount of air intake of each single cell is particularly critical. Uniform and good airflow distribution between single cells can effectively improve battery consistency and improve the performanc...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H01M8/2484
CPCH01M8/2484Y02E60/50
Inventor高鹏然胡清辉徐圣卓文峰
Owner深圳市氢瑞燃料电池科技有限公司