Temperature and humidity uniformity reinforced fuel cell single cell and electric pile

A fuel cell and single cell technology, applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc. Large field resistance and other problems, to achieve the effect of improving work performance and use stability, avoiding uneven temperature distribution, and improving uniformity

Active Publication Date: 2018-02-02

上海氢晨新能源科技有限公司

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Problems solved by technology

The Chinese invention patent with the publication number CN101101992A provides a flow field plate in which the flow channels between the plates are connected in series, which can efficiently discharge reactants, products, and impurities, and prolong the life of the stack. However, in the flow f...

Abstract

The invention relates to a temperature and humidity uniformity reinforced fuel cell single cell and an electric pile. The single cell comprises a positive electrode plate, a negative electrode plate and a membrane electrode assembly arranged between the positive electrode plate and the negative electrode plate; a plurality of positive electrode flowing channels are formed in the positive electrodeplate in parallel; the gas flowing directions in the adjacent two positive electrode flowing channels are opposite; negative electrode flowing channels are formed in the negative electrode plate; andthe electric pile comprises a plurality of single cells stacked in sequence. Compared with the prior art, the gas flowing directions in the adjacent two positive electrode flowing channels are opposite, so that the conditions of over-low or over-high partial temperature and humidity caused by the single gas flowing direction of the conventional flow field can be effectively relieved, the temperature and humidity difference in a gas inlet and a gas outlet can be reduced, the temperature and humidity distribution uniformity of the electric pile can be improved, and water and heat balance in theelectric pile can be ensured, thereby further improving working performance and use stability of the fuel cell; and in addition, the fuel cell single cell is easy to process and manufacture.

Application Domain

Fuel cell heat exchangeReactant parameters control +2

Technology Topic

Electrical batteryWork performance +8

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Examples

Experimental program(2)

Example Embodiment

[0038] Example 1:

[0039] Such as figure 1 A fuel cell single cell with enhanced temperature and humidity uniformity is shown. The single cell includes an anode plate 1, a cathode plate 2, and a membrane electrode assembly arranged between the anode plate 1 and the cathode plate 2. The anode A plurality of anode flow channels 3 are arranged side by side on the plate 1, the gas flow directions in two adjacent anode flow channels 3 are opposite to each other, and a cathode flow channel 4 is provided on the cathode plate 2.

[0040] Among them, the anode electrode plate 1 and the cathode electrode plate 2 are formed by one-step punching and forming of a stainless steel sheet with a thickness of 0.1 mm, and are punched and trimmed. The anode electrode plate 1 and the cathode electrode plate 2 are assembled and bonded by laser welding to form a bipolar plate. The cathode flow channel 4 and the anode flow channel 3 are perpendicular to each other. An anode flow channel partition 101 is provided between two adjacent anode flow channels 3.

[0041] A plurality of first anode flow channels 301 and second anode flow channels 302 are alternately arranged on the anode plate 1 along the width direction of the anode plate 1. One end of the anode plate 1 is provided with a first anode flow channel 301 connected to it. The first anode flow channel air inlet 3011 and the second anode flow channel air outlet 3022 communicated with the second anode flow channel 302.

[0042] The other end of the anode plate 1 is provided with a first anode flow channel outlet 3012 communicating with the first anode flow channel 301 and a second anode flow channel air inlet 3021 communicating with the second anode flow channel 302. Such staggered gas entry and exit modes make the anode plate 1 simultaneously have gas flows in opposite directions, and the gas flow directions in the two adjacent anode flow channels 3 are opposite.

[0043] Such as figure 2 A stack containing the fuel cell single cells with enhanced temperature and humidity uniformity is shown. The stack includes 6 single cells stacked in sequence. The stack also includes a first air inlet channel 5, a second air inlet channel 6, a first air outlet channel 7 and a second air outlet channel 8. The first air inlet channel 5 communicates with the air inlet 3011 of the first anode runner. The second air inlet channel 6 is connected to the second anode channel air inlet 3021, the first air outlet channel 7 is connected to the first anode channel air outlet 3012, and the second air outlet channel 8 is connected to the second anode channel air outlet 3022 through.

[0044] In actual application, the gas introduced in the first gas inlet channel 5 respectively enters the first anode flow channel inlet 3011 of each single cell, and then enters the first anode flow channel 301, and an electrochemical reaction occurs in the reaction zone. Finally, the corresponding first anode flow channel outlet 3012 enters the first outlet channel and then 7 is discharged; the gas introduced in the second inlet channel 6 enters the second anode flow channel inlet 3021 of each single cell respectively, After entering the second anode flow channel 302, an electrochemical reaction occurs in the reaction zone, and finally enters the second gas outlet channel 8 through the corresponding second anode flow channel outlet 3022 and then is discharged. Due to the need of gas sealing, the corresponding first anode flow channel air inlet 3011, first anode channel air outlet 3012, and second anode channel air inlet of the uppermost single cell and the lowermost single cell that do not need to enter or exit gas 3021. The air outlet 3022 of the second anode flow channel is closed.

Example Embodiment

[0045] Example 2:

[0046] A fuel cell single cell with enhanced temperature and humidity uniformity. The single cell includes an anode plate 1, a cathode plate 2, and a membrane electrode assembly arranged between the anode plate 1 and the cathode plate 2, on the anode plate 1 A plurality of anode flow channels 3 are arranged in parallel, the gas flow directions in two adjacent anode flow channels 3 are opposite, and the cathode flow channel 4 is provided on the cathode electrode plate 2.

[0047] Wherein, the cathode flow channel 4 and the anode flow channel 3 are perpendicular to each other. An anode flow channel partition 101 is provided between two adjacent anode flow channels 3.

[0048] A plurality of first anode flow channels 301 and second anode flow channels 302 are alternately arranged on the anode plate 1 along the width direction of the anode plate 1. One end of the anode plate 1 is provided with a first anode flow channel 301 connected to it. The first anode flow channel air inlet 3011 and the second anode flow channel air outlet 3022 communicated with the second anode flow channel 302.

[0049] Such as image 3 As shown, one end of the first anode flow channel 301 is connected to the first anode flow channel air inlet 3011, the other end is connected to the second anode flow channel 302, and one end of the second anode flow channel 302 is connected to the second anode flow channel. The air outlet 3022 is in communication, and the other end is in communication with the first anode flow channel 301. In this way, there is only one set of gas inlets and outlets in the flow field, while ensuring that gas flows in opposite directions in the flow field at the same time, and the gas flow directions in two adjacent anode flow channels 3 are opposite.

[0050] Such as Figure 4 Shown is a stack containing the fuel cell single cells with enhanced temperature and humidity uniformity. The stack includes a plurality of single cells stacked in sequence. The anode plate 1 is alternately arranged along the width direction of the anode plate 1 There are multiple air inlet via holes 9 and air outlet via holes 10. The air inlet via 9 of the upper layer of single cell is connected to the air inlet 3011 of the first anode flow channel of the lower layer of single cell, and the outlet via 10 of the upper layer of single cell is connected with the second anode of the lower layer of single cell The air outlet 3022 of the runner is connected.

[0051] Single-layer single cells such as the first, third, and fifth layers are arranged in reverse to the single cells of even-numbered layers such as the second, fourth, and sixth layers.

[0052] In actual application, a part of the hydrogen gas passes through the air inlet via 9 of each single-layer single cell and communicates with the anode flow channel 3 of the dual-layer single cell, and then is discharged from the air outlet via 10 of the single-layer single cell; The hydrogen gas passes through the gas inlet via 9 of each double-layer single cell and communicates with the anode flow channel 3 of the single-layer single cell, and then is discharged from the gas outlet via 10 of the double-layer single cell.

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Classification and recommendation of technical efficacy words

Improve uniformity

Temperature and humidity uniformity reinforced fuel cell single cell and electric pile

A fuel cell and single cell technology, applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc. Large field resistance and other problems, to achieve the effect of improving work performance and use stability, avoiding uneven temperature distribution, and improving uniformity

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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