CN111370720A - Battery polar plate, bipolar plate structure and fuel battery with same - Google Patents

Battery polar plate, bipolar plate structure and fuel battery with same Download PDF

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Publication number
CN111370720A
CN111370720A CN202010238488.7A CN202010238488A CN111370720A CN 111370720 A CN111370720 A CN 111370720A CN 202010238488 A CN202010238488 A CN 202010238488A CN 111370720 A CN111370720 A CN 111370720A
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China
Prior art keywords
gas flow
battery
channels
battery plate
serpentine
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Pending
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CN202010238488.7A
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Chinese (zh)
Inventor
张永
薛晓婷
肖彪
张威
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN202010238488.7A priority Critical patent/CN111370720A/en
Publication of CN111370720A publication Critical patent/CN111370720A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/0265—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant the reactant or coolant channels having varying cross sections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

The application provides a battery polar plate, a bipolar plate structure and a fuel battery with the same, wherein a plurality of bulges are arranged on the first surface of the battery polar plate, and a snake-shaped gas flow channel is formed among the bulges; the second surface of the battery plate is provided with a plurality of cooling channels, and the cooling channels are in any one of straight line shapes, arc shapes or fold line shapes. The polar plate drainage performance is ensured to be good, and the flow resistance of the cooling liquid can be reduced.

Description

Battery polar plate, bipolar plate structure and fuel battery with same
Technical Field
The application belongs to the technical field of fuel cells, and particularly relates to a battery polar plate, a bipolar plate structure and a fuel cell with the same.
Background
At present, a serpentine flow channel is a flow channel type commonly used in fuel cell design, and the serpentine flow channel has good drainage performance because the resistance of gas is large in the flowing process, so that a part of gas is forced to flow through a gas diffusion layer in the contact area of an electrode plate and a membrane electrode, and the purpose of 'water driving' is achieved.
However, after the simple machine adopts the serpentine or multi-serpentine flow channel as the reactant gas channel on the front surface of the electrode plate, the back surface flow channel is also determined, and is generally also a serpentine flow channel, so that the back surface cooling liquid flow channel is difficult to arrange or the flow resistance is large, the consumed cooling circulation pump work is high, and the energy efficiency level of the fuel cell is reduced.
Therefore, how to provide a battery plate and a bipolar plate structure which can ensure good drainage performance of the plate and reduce the flow resistance of the cooling liquid, and a fuel battery with the battery plate and the bipolar plate structure become problems to be solved by the technical personnel in the field.
Disclosure of Invention
Therefore, the technical problem to be solved by the present application is to provide a battery plate, a bipolar plate structure and a fuel cell having the same, which can ensure good drainage performance of the plate and reduce flow resistance of a coolant.
In order to solve the above problems, the present application provides a battery plate, wherein a plurality of protrusions are disposed on a first surface of the battery plate, and a serpentine gas flow channel is formed between the plurality of protrusions; the second surface of the battery plate is provided with a plurality of cooling channels, and the cooling channels are in any one of straight line shapes, arc shapes or fold line shapes.
Preferably, the serpentine gas flow passage is provided in plurality; the plurality of serpentine gas channels are sequentially arranged in a direction vertical to the gas flow; and/or the bulges comprise longitudinal bulges extending along the gas flow direction and transverse bulges arranged at an included angle with the gas flow direction; and/or, the height of the protrusions is typically 0.1-2 mm; and/or a plurality of cooling channels are communicated with each other; and/or the dogleg comprises a first straight line segment and a second straight line segment arranged at an angle.
Preferably, the direction of extension of the lateral projections is perpendicular to the direction of extension of the longitudinal projections.
Preferably, a transverse flow channel is formed between two adjacent transverse bulges; and the transverse channels of two adjacent serpentine gas channels correspond to each other one by one.
Preferably, a communication port is arranged between two adjacent serpentine gas channels and is communicated with two corresponding transverse channels on the two serpentine gas channels.
Preferably, the second surface is further provided with a communication channel, and the communication channel is arranged between two adjacent serpentine gas flow channels; each cooling passage is communicated to the communication passage.
Preferably, the shape and the position of the cooling channel correspond to the transverse bulge; and/or the shape and the position of the communication channel correspond to the longitudinal bulge.
Preferably, the serpentine gas flow channel has a length W perpendicular to the gas flow direction; wherein W is 5-300 mm; and/or the width of the serpentine gas flow channel is K1; the width of the lateral projection is K2; wherein D is 0.1-10mm from K1+ K2; and/or the length of the serpentine gas flow channel is l; where l ≦ 1000 mm.
Preferably, the serpentine gas flow channel has a length L in the gas flow direction; wherein
Figure BDA0002431795710000021
According to yet another aspect of the present application, there is provided a bipolar plate structure comprising a battery plate; the battery polar plate is the battery polar plate.
Preferably, the bipolar plate structure comprises two cell plates; the two battery pole plates are superposed in a central symmetry mode.
According to still another aspect of the present application, there is provided a fuel cell including a cell plate, the cell plate being the above-described cell plate.
The application provides a battery polar plate, bipolar plate structure and have its fuel cell, do not influence snakelike gas flow channel, guarantee promptly under the good condition of polar plate drainage performance, adopt straight line shape, arc or dogleg shape, flow resistance among the cooling channel compares in snakelike flow channel greatly reduced, prevents to consume higher cooling cycle pump worker, improves fuel cell's efficiency level.
Drawings
Fig. 1 is a schematic structural diagram of a battery plate according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a battery plate according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a bipolar plate structure according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a battery plate according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a battery plate according to an embodiment of the present application.
The reference numerals are represented as:
1. a protrusion; 11. a transverse bulge; 12. a longitudinal projection; 2. a serpentine gas flow channel; 21. a transverse flow passage; 3. a cooling channel; 4. a communication channel; 5. a communication port; 61. a hydrogen inlet; 62. a hydrogen outlet; 71. an oxygen inlet; 72. an oxygen outlet; 81. a coolant inlet; 82. and a cooling liquid outlet.
Detailed Description
Referring to fig. 1 in combination, according to an embodiment of the present application, a battery plate is provided, where a plurality of protrusions 1 are disposed on a first surface of the battery plate, and a serpentine gas flow channel 2 is formed between the plurality of protrusions 1; the second surface of the battery plate is provided with a plurality of cooling channels 3, the cooling channels 3 are in any one of straight line shapes, arc shapes or fold line shapes, and straight line shapes, arc shapes or fold line shapes are adopted, so that the flow resistance in the cooling channels 3 is greatly reduced compared with a snake-shaped gas flow passage 2 under the condition that the drainage performance of the plate is good, the consumption of a higher cooling circulation pump is prevented, and the energy efficiency level of the fuel battery is improved.
Referring to fig. 2 in combination, the serpentine gas channel 2 is provided in plurality; the plurality of serpentine gas channels 2 are sequentially arranged in the direction vertical to the gas flow; and/or the projection 1 comprises a longitudinal projection 12 extending along the gas flow direction and a transverse projection 11 arranged at an included angle with the gas flow direction; and/or, the height of the protrusions 1 is generally 0.1-2 mm; and/or a plurality of cooling channels 3 are communicated with each other; and/or the fold line comprises a first straight line segment and a second straight line segment which are arranged at an angle; the snakelike gas channels 2 can reduce the total flowing length of each snakelike gas, prevent overhigh gas pumping work consumption caused by overlarge flowing resistance of the working medium due to overlong snakelike gas channels 2, increase the flowing uniformity of the working medium in a flow field area, and are particularly suitable for a polar plate structure with a larger active area; the plurality of cooling channels 3 are communicated with each other,
furthermore, the extending direction of the transverse bulge 11 is perpendicular to the extending direction of the longitudinal bulge 12, so that the gas flow resistance is increased, the possibility that gas turns over the bulge along the vertical direction is increased, the gas flows over the bulge in a longitudinal diffusion mode and must pass through a contact area between the polar plate and the porous diffusion layer of the membrane electrode, the discharge of reaction generated water and gas diffusion mass transfer in the area are enhanced, the retained water in the area where the polar plate is in contact with the membrane electrode is more easily discharged in time, and the retention of the reaction generated water in the area is reduced as much as possible; the technical problem that water in a membrane electrode area which is in contact with a polar plate is difficult to carry and discharge due to the fact that the water is far away from a gas flowing area is effectively solved; water retention in the area is also prevented to affect gas transport and accelerate catalyst corrosion in the area; the performance and life of the hydrogen fuel cell can be improved.
Further, a transverse flow channel 21 is formed between two adjacent transverse bulges 11; the transverse flow channels 21 of two adjacent serpentine gas flow channels 2 are in one-to-one correspondence.
Referring to fig. 4 in combination, a communication port 5 is arranged between two adjacent serpentine gas channels 2, the communication port 5 communicates two corresponding transverse channels 21 on the two serpentine gas channels, and the gas in the two adjacent serpentine gas channels 2 is communicated, so that the gas flows are communicated, the uniformity of gas distribution is facilitated, and the formation of local gas resistance is avoided.
Furthermore, a communication channel 4 is also arranged on the second surface, and the communication channel 4 is arranged between two adjacent serpentine gas channels 2; each cooling passage 3 is communicated to a communication passage 4.
Further, the shape and position of the cooling channel 3 correspond to the transverse projection 11; and/or the shape and the position of the communication channel 4 correspond to the longitudinal bulge 12.
Further, the length of the serpentine gas channel 2 in the direction perpendicular to the gas flow direction is W; wherein W is 5-300 mm; and/or the width of the serpentine gas channel 2 is K1; the width of the transverse projection 11 is K2; wherein D is 0.1-10mm from K1+ K2; and/or the length of the serpentine gas channel 2 is l; l is less than or equal to 1000mm, and under the parameter, the retained water in the contact area of the polar plate and the membrane electrode can be discharged in time; and the cooling circulation pump with high consumption is prevented under the condition of ensuring good drainage performance of the polar plate.
Further, the length of the serpentine gas channel 2 in the gas flow direction is L; wherein
Figure BDA0002431795710000041
The width and the length of the serpentine gas channel 2 are reasonably configured, and the problem that the concentration of the reaction gas at the rear section in the serpentine gas channel 2 is sharply reduced is solved.
According to an embodiment of the present application, a bipolar plate structure includes a battery plate; the battery polar plate is the battery polar plate.
Further, the bipolar plate structure comprises two battery plates; the two battery pole plates are superposed in a central symmetry mode.
Referring to fig. 3 in combination, the bipolar plate structure is provided with a hydrogen inlet 61, a hydrogen outlet 62, an oxygen inlet 71, an oxygen outlet 72, a coolant inlet 81 and a coolant outlet 82.
According to the embodiment of the application, the fuel cell comprises the cell polar plate, and the cell polar plate is the cell polar plate.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims (11)

1. A battery plate is characterized in that a plurality of bulges (1) are arranged on a first surface of the battery plate, and a snake-shaped gas flow passage (2) is formed among the bulges (1); the second surface of the battery plate is provided with a plurality of cooling channels (3), and the cooling channels (3) are in any one of a straight line shape, an arc shape or a fold line shape.
2. The battery plate according to claim 1, wherein the serpentine gas flow channel (2) is provided in plurality; the plurality of serpentine gas channels (2) are sequentially arranged in the direction vertical to the gas flow; and/or the bulge (1) comprises a longitudinal bulge (12) extending along the gas flow direction and a transverse bulge (11) arranged at an included angle with the gas flow direction; and/or the height of the protrusions (1) is generally 0.1-2 mm; and/or a plurality of cooling channels (3) are communicated with each other; and/or the fold line comprises a first straight line segment and a second straight line segment which are arranged at an angle.
3. The battery plate according to claim 2, characterized in that the direction of extension of the transverse projections (11) is perpendicular to the direction of extension of the longitudinal projections (12); and/or a transverse flow channel (21) is formed between two adjacent transverse bulges (11); and the transverse flow channels (21) of two adjacent serpentine gas flow channels (2) are in one-to-one correspondence.
4. The battery plate according to claim 3, characterized in that a communication port (5) is arranged between two adjacent serpentine gas channels (2), and the communication port (5) is communicated with two corresponding transverse channels (21) on the two serpentine gas channels.
5. The battery plate according to claim 2, characterized in that the second surface is further provided with a communication channel (4), and the communication channel (4) is arranged between two adjacent serpentine gas flow channels (2); each of the cooling passages (3) is communicated to the communication passage (4).
6. The battery plate according to claim 5, characterized in that the cooling channels (3) are shaped and positioned in correspondence with the lateral projections (11); and/or the shape and the position of the communication channel (4) correspond to the shape and the position of the longitudinal bulge (12).
7. The battery plate of claim 2, wherein the serpentine gas flow channel (2) has a length W perpendicular to the gas flow direction; wherein W is 5-300 mm; and/or the width of the serpentine gas flow channel (2) is K1; the width of the transverse projection (11) is K2; wherein D is 0.1-10mm from K1+ K2; and/or the length of the serpentine gas channel (2) is l; where l ≦ 1000 mm.
8. The battery plate of claim 7, wherein the serpentine gas flow channel (2) has a length L in the gas flow direction; wherein
Figure FDA0002431795700000011
9. A bipolar plate structure includes a battery plate; a battery plate according to any one of claims 1 to 8.
10. The bipolar plate structure of claim 9 wherein said bipolar plate structure comprises two of said battery plates; and two battery pole plates are superposed in a centrosymmetric manner.
11. A fuel cell comprising a cell plate, wherein the cell plate is according to any one of claims 1 to 8.
CN202010238488.7A 2020-03-30 2020-03-30 Battery polar plate, bipolar plate structure and fuel battery with same Pending CN111370720A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113871647A (en) * 2021-12-07 2021-12-31 浙江天能氢能源科技有限公司 Air-cooling integrated membrane electrode structure of fuel cell and preparation method thereof
CN114695909A (en) * 2020-12-30 2022-07-01 上海德迩新能源技术有限公司 Unipolar plate, bipolar plate and fuel cell

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114695909A (en) * 2020-12-30 2022-07-01 上海德迩新能源技术有限公司 Unipolar plate, bipolar plate and fuel cell
CN113871647A (en) * 2021-12-07 2021-12-31 浙江天能氢能源科技有限公司 Air-cooling integrated membrane electrode structure of fuel cell and preparation method thereof

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