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A kind of multistage fuel cell structure and its power generation method

A fuel cell and fuel technology, applied in the direction of fuel cells, fuel cell additives, fuel cell components, etc., can solve problems such as battery performance degradation, anode damage, drying up, etc., to increase current density, promote reactions, and avoid partial overheating effect

Inactive Publication Date: 2019-10-18
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The technical problem to be solved by the present invention is to overcome the defects of the prior art, to provide a simultaneous classification process through the electrode collector, anode and cathode, and to control the fuel cell to output different voltages at different stages through the fuel cell control converter, so that A multi-stage fuel cell structure that better solves the problems of the concentration drop along the flow channel after the fuel reaction, the phenomenon of "drying up" upstream of the flow channel, the phenomenon of "flooding" downstream of the flow channel, battery performance degradation, and anode damage.

Method used

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  • A kind of multistage fuel cell structure and its power generation method
  • A kind of multistage fuel cell structure and its power generation method
  • A kind of multistage fuel cell structure and its power generation method

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Embodiment 1

[0032] The invention is a multi-stage fuel cell structure. to attach figure 1 And attached figure 2 The schematic diagram of the single structure of the three-stage fuel cell stack in Fig. Taking a multi-stage fuel cell with a flow channel length of 10cm as an example (the size is only used for illustration), the multi-stage fuel cell is divided into three stages along the flow channel: stage 1 (3cm), stage 2 (4cm) and stage 3 (3cm). Wherein, the electrode collectors 4 of each level are independently insulated from each other. The stages of the anode 3 are independently insulated from each other. The cathode 1 stages are independently insulated from each other. The fuel and the oxidant respectively pass into the fuel channel and the oxidant channel of the multi-stage fuel cell. Take a multi-stage fuel cell with an ideal voltage of 1.2V as an example: on stage 1, stage 2, and stage 3, the discharge instrument (a kind of converter for fuel cell control, for illustration o...

Embodiment 2

[0034] Such as image 3 Shown: In the transverse direction of a multi-stage fuel cell, five single cells form a stack (numbers are for illustration only). The monomers of five multistage fuel cells share the cathode 1 , the electrolyte membrane 2 , the anode 3 and the electrode collector 4 . The cell stack is divided into 3 levels in the flow channel direction: level 1, level 2 and level 3 (the number of levels is for illustration only). The electrode collectors 4 of each stage of the multi-stage fuel cell are electrically insulated from each other. The stages of the anode 3 are independently insulated from each other. The cathode 1 stages are independently insulated from each other. During the working process of the multi-stage fuel cell, the voltage of each stage is controlled by the discharge instrument (a kind of converter for fuel cell control, which is only used for illustration here), and decreases sequentially along the direction of the flow channel. The voltage is...

Embodiment 3

[0036] Such as Figure 4 Shown: In the longitudinal direction of multi-stage fuel cells, multiple cells form a fuel cell structure ( Figure 4 illustrated with two batteries). In the longitudinal direction, two adjacent fuel cell cells share the electrode collector 4 . The cell is divided into multiple stages in the direction of the fuel cell flow path ( Figure 4 The battery is divided into 3 levels for explanation). The battery stack anode 3 is divided into multiple stages along the direction of the flow channel. The battery stack cathode 1 is divided into multiple stages in the fuel cell direction. During the discharge process of the fuel cell stack, each stage of the battery stack controls the voltage through the discharge instrument (a kind of converter for fuel cell control, which is only used for illustration here), and the voltage is sequentially reduced along the direction of the flow channel. The voltage is converted into the required output voltage through a t...

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Abstract

The invention relates to a multi-grade fuel cell structure. The multi-grade fuel cell structure comprises an anode, an electrolyte layer, a cathode, an electrode current collector, a funnel flow channel, an oxidant flow channel and a fuel cell control converter; the fuel cell control converter is used for controlling voltage of each grade of electrode; relatively high electrode voltage is controlled by a part close to the upstream of the fuel cell control converter; the electrode voltage is gradually reduced along the flow channel, so that a phenomenon that fuel concentration is reduced along the flow channel, caused by fuel reaction, a phenomenon that the upstream of the flow channel is dried up and a phenomenon that the downstream of the flow channel is flooded, the performance of a cell is reduced, the anode is damaged and the like are solved better.

Description

technical field [0001] The invention relates to the field of new energy technology, in particular to a multi-stage fuel cell structure and a power generation method thereof. Background technique [0002] During the working process of the fuel cell, the fuel and the oxidant are respectively fed into the cell. The proton exchange membrane fuel cell with hydrogen as fuel is an example. During the operation of the battery, hydrogen reaches the anode through diffusion, and generates H through catalysis. + and electrons, H + Crosses the proton exchange membrane in the form of hydronium ions. Oxygen diffuses into the cathode, and the oxygen ions produced by catalysis combine with the hydrogen ions passing through the proton exchange membrane to form water and release a large amount of heat. The electrons move from the anode to the cathode through the external circuit and generate current. The electrode reactions and overall reactions are as follows: [0003] anode: [0004] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M8/04
CPCH01M8/02H01M8/0202H01M8/04544Y02E60/50
Inventor 申双林匡勇
Owner CHINA UNIV OF MINING & TECH
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