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A fuel cell bipolar plate and a stack composed of the same

A technology of fuel cells and fuel cell units, which is applied in the direction of fuel cells, circuits, electrical components, etc., can solve problems affecting the voltage output of stacks, and achieve the effects of improving reliability and durability and reducing costs

Active Publication Date: 2018-07-06
顺风恒劲氢能源发展(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once any battery cell is damaged, it will affect the voltage output of the entire stack

Method used

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  • A fuel cell bipolar plate and a stack composed of the same
  • A fuel cell bipolar plate and a stack composed of the same
  • A fuel cell bipolar plate and a stack composed of the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] see figure 1 , 2 , shown in 6, 8, and 9, the fuel cell bipolar plate of the present invention includes a support plate 1 and a conductive plate 2, and the two sides of the rectangular support plate are provided with fuel inlet holes 5-1, fuel outlet holes 5-2, cooling agent into the hole 6 - 1. Coolant outlet hole 6-2, oxidant inlet hole 7-1, oxidant outlet hole 7-2, one side of the support plate is provided with a coolant flow channel, and the other side is provided with a rectangular concave area of ​​equal depth, the conductive The plate 2 has the same volume as the concave area, and the concave area is only provided with an opening on the lateral side of the support plate, and the conductive plate 2 is embedded in the concave area and connected to the support plate by injection molding or bonding as a whole; one end of the conductive plate 2 extending beyond the support plate 1. Fuel inlet 5-1, fuel outlet 5 - 2, or the oxidant inlet hole 7-1, the flow channel 8...

Embodiment 2

[0050] see image 3 with Figure 4 The structure of the spliced ​​plate supporting plate in embodiment 2 is the same as that in embodiment 1, the difference is that the concave region 4 of the supporting plate 1 is provided with an opening on the lateral side of the supporting plate, and after the conductive plate 2 is embedded in the concave region, it is completely Cover the fuel outlet hole 5-2 at one end of the support plate, the coolant inlet hole 6-1 and the oxidant inlet hole 7-2, so the fuel outlet hole 5-2' and the coolant inlet hole 6-1 are provided at the same position of the conductive plate 'and the oxidant inlet hole 7-2', the three groups of holes are relatively up and down. A flow channel 8 is connected between the fuel inlet hole 5-1 or the oxidant outlet hole 7-2 on the support plate and the concave area, and the fuel outlet hole 5-2' or the oxidant inlet hole 7-1' on the conductive plate is connected to the flow channel. Channel 8, a gas reaction flow chan...

Embodiment 3

[0054] see Figure 7 , The plate splicing method of this embodiment is the same as that of Embodiment 1, the difference lies in the structure of the support plate. The fuel cell bipolar plate includes a support plate 1 and a conductive plate 2. There are fuel inlet and outlet holes, coolant inlet and outlet holes, and oxidant inlet and outlet holes on both sides of the rectangular support plate. Both sides of the support plate are provided with rectangular concave areas of equal depth. The positions of the concave areas are opposite, and the positions of the openings are the same, and an opening is provided on the lateral side of the support plate 1 . On the anode surface of the pole plate, a flow channel is connected between the fuel inlet and outlet holes on the support plate and the concave area, and the flow channel is connected with the gas reaction flow channel 9 provided on the conductive plate 2; on the cathode surface of the pole plate, the support plate A flow chann...

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PUM

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Abstract

The invention belongs to the technical field of a fuel cell, and specifically relates to a fuel cell bipolar plate and an electric pile constituted by the same. The fuel cell bipolar plate comprises a supporting plate (1) and a conducive plate (2), wherein the conducive plate comprises a reaction region and an extension region (3); fuel inlet / outlet holes, oxidizing agent inlet / outlet holes and coolant inlet / outlet holes are formed in the two sides of the supporting plate; a coolant runner is formed in one surface of the supporting plate while a downward concave region (4) having the same depth as the coolant runner is formed in the other surface of the supporting plate; the reaction region of the conductive plate and the downward concave region (4) are equivalent in the volume; only one opening is formed in the downward concave region; the opening of the downward concave region is formed in the transverse side or longitudinal side of the supporting plate; the reaction region of the conductive plate is embedded into the downward concave region and connected with the supporting plate; and the extension region of the conductive plate is exposed out of the supporting plate. Compared with the prior art, the overall electric pile provided by the invention can be connected in series and then connected in parallel, or can be wholly connected in parallel; and therefore, if any one fuel cell unit is damaged, the output voltage of the overall electric pile is not affected, so that the reliability and the durability of the fuel cell pile are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to a bipolar plate of a fuel cell and an electric stack composed thereof. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of hydrogen and oxygen into electrical energy through an electrode reaction. A fuel cell is generally constructed of a plurality of cells, each cell comprising two electrodes (anode and cathode) separated by an electrolyte element and assembled in series with each other to form a fuel cell stack. The electrochemical reaction is achieved by supplying the appropriate reactants to each electrode, ie fuel to one electrode and oxidant to the other, creating a potential difference between the electrodes and thereby generating electrical energy. [0003] In order to supply each electrode with reactants, specific interface elements commonly referred to as "bipolar plates" and arranged on both sides of each individual c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0271H01M8/2404H01M8/2465
CPCY02E60/50
Inventor 高勇
Owner 顺风恒劲氢能源发展(上海)有限公司