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Fuel cell stack device with anti-flooding function and control method

A technology of fuel cell stacks and fuel cells, which is applied in the direction of fuel cells, circuits, electrical components, etc., and can solve problems such as flooding, heat insulation, and inconspicuousness

Pending Publication Date: 2022-01-14
BEIJING SINOHYTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention aims to provide a fuel cell stack device and control method with an anti-flooding function, so as to solve the problems that existing fuel cell stacks are prone to flooding and heat insulation is not obvious

Method used

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  • Fuel cell stack device with anti-flooding function and control method
  • Fuel cell stack device with anti-flooding function and control method
  • Fuel cell stack device with anti-flooding function and control method

Examples

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Effect test

Embodiment 1

[0064] An embodiment of the present invention discloses a fuel cell stack device with anti-flooding function, including a front plastic end plate 1, a positive electrode collector plate 2, a fuel cell group 7, a negative electrode collector plate 5 and a rear plastic end plate 6, such as figure 1 As shown, in addition, AC impedance measurement equipment and controller are also included.

[0065] The fuel cell stack 7 includes a plurality of monolithic fuel cells connected in series.

[0066] The front plastic end plate 1 and the positive current collector 2 are placed on the positive side of the fuel cell stack 7 in sequence, and the negative current collector 5 and the rear plastic end plate 6 are placed on the negative side of the fuel cell stack 7 in sequence.

[0067] Each electrode of the AC impedance measuring device is respectively connected to a single fuel cell in the fuel cell stack 7, and the output end is connected to the input end of the controller.

[0068] The...

Embodiment 2

[0075] To improve on the basis of Example 1, the materials of the front plastic end plate 1 and the rear plastic end plate 6 can be epoxy resin material, ABS (acrylonitrile-butadiene-styrene) plastic, PA (polyamide ) One of the plastics. The thickness is 2~3 cm.

[0076] Preferably, when the material of the front plastic end plate 1 and the rear plastic end plate 6 is epoxy resin material, the thickness is 2 cm; the epoxy resin material is 2.5 cm thick; the PA (polyamide) material is used, the thickness is 2 cm. is 2.5 cm.

[0077] Preferably, the fuel cell stack device further includes a floating end plate 8 and a spring group 9 connected in sequence, such as figure 2 shown, and a sealed plastic case. The floating end plate 8 and the spring set 9 are arranged between the negative electrode current collecting plate 5 and the rear plastic end plate 6; and the negative electrode current collecting plate 5 is connected to the rear plastic end plate 6 through the floating end ...

Embodiment 3

[0100] Another embodiment of the present invention also discloses the control method of the fuel cell stack device described in the above-mentioned embodiments 1 and 2, including the following steps:

[0101] S1. Regularly acquire the AC impedance of all single fuel cells in the fuel cell stack at the current moment;

[0102] S2. According to the AC impedance of all the single-chip fuel cells, it is judged in real time whether flooding occurs inside the stack device;

[0103] S3. If it occurs, obtain the real-time output current of the fuel cell stack device, adjust the air flow, gas humidity, and exhaust gas discharge cycle entering the fuel cell stack according to the AC impedance combined with the real-time output current, and judge again until no Output the result that the flooding phenomenon of the fuel cell stack device has been resolved until the flooding phenomenon occurs;

[0104] S4. If not, output the result that the fuel cell stack device is not flooded.

[0105]...

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Abstract

The invention provides a fuel cell stack device, which belongs to the technical field of fuel cells, and solves the problems that an existing fuel cell stack is easy to be flooded and is not obvious in heat insulation. The device comprises a front plastic end plate, a positive collector plate, a fuel cell stack, a negative collector plate, a rear plastic end plate, alternating-current impedance measuring equipment and a controller. The front plastic end plate and the positive collector plate are sequentially arranged on the positive side of the fuel cell stack, and the negative collector plate and the rear plastic end plate are sequentially arranged on the negative side of the fuel cell stack. The controller is used for judging whether the fuel cell is flooded or not in real time according to the alternating-current impedance of each single fuel cell; and if the flooding phenomenon occurs, the gas flow, the gas humidity and the exhaust gas emission period entering the fuel cell stack are further adjusted according to the alternating current impedance and the output current of the fuel cell stack device until the flooding phenomenon does not occur. The anti-flooding function is achieved, and the effects of being light in weight and low in machining cost are achieved.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell stack device with an anti-flooding function and a control method. Background technique [0002] During the operation of the fuel cell stack, the monolithic fuel cells at the head or tail of the stack are prone to single low voltage phenomenon, which will cause shutdown and cause irreversible damage to the stack when the single low phenomenon is serious. [0003] Under normal circumstances, the existing fuel cell stacks generally use metal end plates, and the single low end plate is likely to be caused by flooding, which causes blockage of the flow channels in the local area of ​​the stack, and liquid water covers the surface of the catalyst, causing Hydrogen and air cannot react effectively with the catalyst, leading to hydrogen starvation and air starvation, which gradually deteriorates the performance of the monolithic fuel cell and corrodes the catalyst, which h...

Claims

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Application Information

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IPC IPC(8): H01M8/2465H01M8/2475H01M8/04537H01M8/04746H01M8/04828
CPCH01M8/2465H01M8/2475H01M8/04641H01M8/04753H01M8/04835H01M8/04761Y02E60/50
Inventor 张岩徐云飞李飞强张国强
Owner BEIJING SINOHYTEC
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