CN217768433U - High-power hydrogen fuel cell stack - Google Patents
High-power hydrogen fuel cell stack Download PDFInfo
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- CN217768433U CN217768433U CN202221793650.2U CN202221793650U CN217768433U CN 217768433 U CN217768433 U CN 217768433U CN 202221793650 U CN202221793650 U CN 202221793650U CN 217768433 U CN217768433 U CN 217768433U
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- 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
Abstract
The utility model discloses a high-power hydrogen fuel cell stack, which comprises an upper end plate, a positive current collecting plate, a battery pack, a negative current collecting plate, an insulating plate, a supporting plate and a lower end plate which are sequentially stacked from top to bottom and are fastened into a whole through a binding band, wherein the outer surfaces of the upper end plate and the lower end plate are provided with clamping grooves matched with the binding band; the left end and the right end of the upper end plate are provided with water and gas connecting ports; the battery pack comprises a plurality of single battery packs, each single battery pack comprises a membrane electrode and a bipolar plate, and a sealing ring is arranged between each membrane electrode and each bipolar plate; the bipolar plate comprises a plate body, wherein gas-liquid ports correspondingly communicated with the water-gas connecting ports are formed in two ends of the plate body; a working flow field area is arranged on the plate body, flow field distribution areas are arranged at two ends of the working flow field area, and a plurality of flow guide strips are arranged in the flow field distribution areas. The utility model discloses a to the rational arrangement of air current field distribution area, can reduce whole gas flow rate difference, improve the air current distribution homogeneity, and then promote the fuel cell performance.
Description
Technical Field
The utility model relates to a fuel cell technical field, in particular to high-power hydrogen fuel cell stack.
Background
The hydrogen fuel cell is an electrochemical electricity generating device which does not need to pass through a Carnot cycle, and has high energy conversion rate. The hydrogen and oxygen react electrochemically in the fuel cell to produce electricity, heat, and water. In the energy conversion, no pollutants are generated, so the hydrogen fuel cell is considered as an environmentally friendly energy device. The hydrogen fuel cell stack is the core device of the fuel cell and mainly assembled by a membrane electrode assembly, a bipolar plate, a sealing element and the like. With the development of fuel cell technology, the application field of the fuel cell technology is wider and wider, and the potential in large-scale commercial vehicles, heavy trucks, ships and the like is gradually shown, which also means that the required power of the fuel cell stack is larger and larger. The high-power galvanic pile has large effective area and more components, wherein the structural design of the bipolar plate is crucial, and the performance of the final galvanic pile is greatly influenced. The bipolar plate plays roles of supporting and collecting current, providing a channel for cooling liquid, separating an oxidant and a reducing agent and the like in the fuel cell, and more importantly, the structural design of the bipolar plate determines the distribution of an airflow field, so that the consistency, the service life and the performance of the fuel cell are influenced. The traditional bipolar plate of the hydrogen fuel cell usually adopts a form of parallel straight flow channels, the structure is easy to process and has low cost, but the phenomenon of uneven flow field distribution exists; and the active area of the traditional bipolar plate is mostly less than 300cm 2 If the requirement of high power is to be met, more components need to be overlapped, but the cost is increased, meanwhile, the consistency of the galvanic pile product is influenced, and the industrial application is not facilitated.
SUMMERY OF THE UTILITY MODEL
Based on the technical problem, the utility model provides a high-power hydrogen fuel cell stack.
The utility model discloses the technical solution who adopts is:
a high-power hydrogen fuel cell stack comprises an upper end plate, an anode current collecting plate, a cell group, a cathode current collecting plate and a lower end plate, wherein the anode current collecting plate and the cathode current collecting plate are respectively positioned at the upper end and the lower end of the cell group;
the upper end plate, the anode current collecting plate, the battery pack, the cathode current collecting plate, the insulating plate, the supporting plate and the lower end plate are sequentially stacked and arranged from top to bottom and are fastened into a whole through a binding band, and clamping grooves matched with the binding band are formed in the outer surfaces of the upper end plate and the lower end plate;
the left end and the right end of the upper end plate are provided with water and gas connecting ports;
the battery pack comprises a plurality of single battery packs, each single battery pack comprises a membrane electrode and a bipolar plate, and a sealing ring is arranged between each membrane electrode and each bipolar plate;
the bipolar plate comprises a plate body, wherein gas-liquid ports correspondingly communicated with the water-gas connecting ports are formed in two ends of the plate body; a working flow field area is arranged on the plate body, flow field distribution areas are arranged at two ends of the working flow field area, and a plurality of flow guide strips are arranged in the flow field distribution areas.
Preferably, the two sides of the anode current collecting plate and the two sides of the cathode current collecting plate are both provided with bending pieces, and the bending pieces are arranged by being attached to the side walls of the upper end plate or the supporting plate and are fixed on the upper end plate or the supporting plate through bolts.
Preferably, a cushion washer is provided between the support plate and the lower end plate.
Preferably, the flow guide strip comprises a first horizontal section body, a vertical section body and a second horizontal section body which are sequentially connected, and two ends of the vertical section body are respectively arranged at a right angle with the first horizontal section body and the second horizontal section body; the first horizontal segment body, the vertical segment body and the second horizontal segment body are continuous or discontinuous.
Preferably, a plurality of columnar bulges are arranged at the junction of the working flow field area and the flow field distribution area.
Preferably, the columnar protrusion is a rounded rectangular columnar protrusion or a cylindrical protrusion.
Preferably, a flow channel is arranged in the working flow field region, the flow channel comprises a straight flow channel and a waveform flow channel, wherein the straight flow channel is located in the region close to the flow field distribution region on the two sides of the working flow field region, and the waveform flow channel is located in the middle region of the working flow field region;
the width of the flow channels is 0.6-1.2mm, the interval width between adjacent flow channels is 0.6-1.2mm, and the groove depth of the flow channels is 0.3-0.5mm.
The utility model has the beneficial technical effects that:
1. the utility model discloses bipolar plate air current field distribution area among high-power hydrogen fuel cell stack adopts the form of being interrupted right angle water conservancy diversion strip and continuous right angle water conservancy diversion strip, is favorable to reducing whole gas velocity of flow difference, avoids gas crowding to cause the current density increase condition in the part, makes gas can improve the air current distribution homogeneity at the regional dispersion in low reaches effectively, and then promotes the fuel cell performance.
2. The utility model discloses flow channel in bipolar plate working flow field district among the high-power hydrogen fuel cell stack adopts straight shape runner and waveform flow channel to combine, improves mass transfer efficiency.
3. The utility model discloses bipolar plate air current field distribution area is provided with the column arch with work flow field district junction in the high-power hydrogen fuel cell pile, plays the effect of vortex, and the air current that further dispersion got into the work flow field area, the column arch still plays the supporting role to the membrane electrode simultaneously.
4. The utility model discloses backup pad plays the effect of supporting the galvanic pile subassembly among the high-power hydrogen fuel cell pile, and the packing ring has been placed to the backup pad below, but pressure buffering alleviates the pressure loss to the lower terminal plate.
5. The utility model discloses after well upper head plate, anodal current collector, group battery, negative pole current collector, lower end plate etc. stack the arrangement, it is fixed through the bandage to the surface of upper head plate and lower end plate is provided with the draw-in groove with bandage looks adaptation, with prevent about the bandage drunkenness, the equipment is convenient, and the structure is firm.
6. The utility model discloses the both sides of well positive current collector and negative current collector all are provided with the piece of bending to it is fixed with upper end plate or backup pad through the piece of bending, further improved the connection compactness of each subassembly in the battery pile.
Drawings
The present invention will be further described with reference to the following drawings and embodiments:
FIG. 1 is a schematic view of the structure of a high power hydrogen fuel cell stack according to the present invention;
FIG. 2 is a schematic view of the bipolar plate structure of the high-power hydrogen fuel cell stack according to the present invention;
fig. 3 is a schematic view of a partial structure of a bipolar plate flow field distribution area portion in a high-power hydrogen fuel cell stack according to the present invention.
Detailed Description
With reference to the attached drawings, the high-power hydrogen fuel cell stack comprises an upper end plate 1, a positive current collecting plate 2, a cell group 3, a negative current collecting plate 4 and a lower end plate 5, wherein the positive current collecting plate 2 and the negative current collecting plate 4 are respectively arranged at the upper end and the lower end of the cell group 3. The positive and negative collector plates have the functions of inputting and outputting current and voltage. The upper end plate 1 is arranged above the anode current collecting plate 2, the lower end plate 5 is arranged below the cathode current collecting plate 4, an insulating plate 6 and a supporting plate 7 are further arranged between the cathode current collecting plate 4 and the lower end plate 5, the insulating plate plays a role in insulating and isolating, and the supporting plate plays a role in supporting the pile assembly. The upper end plate 1, the anode current collecting plate 2, the battery pack 3, the cathode current collecting plate 4, the insulating plate 6, the supporting plate 7 and the lower end plate 5 are sequentially stacked, arranged and assembled from top to bottom and fastened into a whole through a plurality of binding bands 9. The outer surfaces of the upper end plate 1 and the lower end plate 5 are provided with clamping grooves 10 matched with the binding bands 9, and the binding bands 9 can be limited through the clamping grooves 10. The upper end plate 1 has an insulating function, and water and gas connecting ports 11 are arranged at the left end and the right end of the upper end plate 1. The battery pack comprises a plurality of single battery packs, each single battery pack comprises a membrane electrode 12 and a bipolar plate 13, a sealing ring 14 is arranged between the membrane electrode 12 and the bipolar plate 13, and the sealing ring 14 plays a sealing role. The sealing ring is made of silicon rubber or fluororubber. The bipolar plate 13 comprises a plate body, wherein gas-liquid ports 15 correspondingly communicated with the water-gas connecting ports 11 are arranged at two ends of the plate body, and the gas-liquid ports 15 can be further divided into an anode gas inlet and outlet, a cathode gas inlet and outlet and a liquid inlet and outlet. A working flow field area 16 is arranged on the plate body, flow field distribution areas 17 are arranged at two ends of the working flow field area 16, and a plurality of guide strips 18 are arranged in the flow field distribution areas 17.
The utility model discloses bipolar plate air current field distribution area among high-power hydrogen fuel cell stack through adopting the reasonable of water conservancy diversion strip 18 to arrange, makes the even dispersion of gas to the workflow field area that comes from the import department, avoids gaseous crowded, causes the local secret rising of electricity, improves the fuel cell performance. Additionally, the utility model discloses backup pad plays the effect of supporting the galvanic pile subassembly among the high-power hydrogen fuel cell pile, and the packing ring has been placed to the backup pad below, but pressure buffering alleviates the pressure loss to lower end plate. The utility model discloses after well upper end plate, anodal current collector, group battery, negative pole current collector, lower end plate etc. stacked the arrangement, it is fixed through the bandage to the surface of upper end plate and lower end plate is provided with the draw-in groove with bandage looks adaptation, in order to prevent about the bandage drunkenness, the equipment is convenient, and the structure is firm.
As right the utility model discloses a further design, the both sides of anodal current collector 2 and negative pole current collector 4 all are provided with bending piece 19, and bending piece 19 pastes the lateral wall of upper end plate 1 or backup pad 7 and arranges to on being fixed in upper end plate or backup pad through the bolt. The utility model discloses the both sides of well positive current collector and negative current collector all are provided with the piece of bending to it is fixed with upper end plate or backup pad through the piece of bending, further improved the connection compactness of each subassembly in the battery pile.
Further, a cushion washer 20 is provided between the support plate 7 and the lower end plate 5. And a circular ring clamping groove for placing a buffer gasket is arranged below the supporting plate. The utility model discloses backup pad plays the effect of supporting the galvanic pile subassembly among the high-power hydrogen fuel cell pile, and the packing ring has been placed to the backup pad below, but pressure buffering alleviates the pressure loss to the lower terminal plate.
Further, the water conservancy diversion strip 18 is including the first horizontal segment body, vertical section body and the second horizontal segment body that connect gradually, and the both ends of vertical section body are the right angle with first horizontal segment body and second horizontal segment body respectively and arrange. The first horizontal section body, the vertical section body and the second horizontal section body are continuous or discontinuous. The high-power fuel cell bipolar plate airflow field distribution area adopts the forms of the interrupted right-angle flow guide strips and the continuous right-angle flow guide strips, so that the overall gas flow velocity difference is favorably reduced, the current density increase condition caused by gas crowding at local parts is avoided, gas can be effectively dispersed in the downstream area, the airflow distribution uniformity is improved, and the performance of the fuel cell is further improved.
The width of the discontinuous right-angle diversion strip is the same as that of the continuous right-angle diversion strip, and the preferred width is 0.6-1.0mm. The discontinuous right-angle diversion strips and the continuous right-angle diversion strips are arranged at intervals, and the intervals between the diversion strips are the same, preferably 0.6-1.2mm.
Furthermore, a plurality of columnar protrusions 21 are arranged at the boundary of the working flow field region 16 and the flow field distribution region 17. The columnar protrusions 21 are rounded rectangular columnar protrusions or cylindrical protrusions. The round corner rectangular columnar bulge is parallel to the adjacent right-angle diversion strips. The width of the round corner rectangular columnar bulge is 0.8-1.2mm, and the length is 1.0-1.8mm. The height of the round corner rectangular columnar bulge and the height of the cylindrical bulge are approximately the same as the ridge height of the flow channel in the working flow field area. The utility model discloses bipolar plate air current field distribution area is provided with the column arch with work flow field district junction in the high-power hydrogen fuel cell stack, plays the effect of vortex, and cooperation water conservancy diversion strip, the air current that further dispersion got into the work flow field area, column arch 21 still plays the supporting role to the membrane electrode simultaneously.
The length of the round-corner rectangular columnar bulge and the diameter of the cylindrical bulge in the airflow field distribution area of the high-power fuel cell bipolar plate are related to the size of a blank area formed between the flow guide strip and the working flow field area, the blank area is large, the length of the round-corner rectangular columnar bulge is long, and the diameter of the cylindrical bulge is large.
Furthermore, runners are arranged in the working flow field area, and the runners include straight runners 22 and waveform runners 8, wherein the straight runners 22 are located in areas on two sides of the working flow field area, which are close to the flow field distribution area, and the waveform runners 8 are located in the middle area of the working flow field area. The width of the flow channel is 0.6-1.2mm, the interval width between adjacent flow channels is 0.6-1.2mm, and the depth of the channel is 0.3-0.5mm. The utility model discloses flow channel in bipolar plate working flow field area in the high-power hydrogen fuel cell stack adopts straight shape runner and waveform flow channel to combine, improves mass transfer efficiency.
The bipolar plate working flow field area comprises a plurality of flow channels, the flow field distribution area is communicated with the working flow field, and gas is uniformly distributed through the flow field distribution area and uniformly flows into the working flow field area.
Parts not described in the above modes can be realized by adopting or referring to the prior art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A high power hydrogen fuel cell stack characterized by: the battery pack comprises an upper end plate, an anode current collecting plate, a battery pack, a cathode current collecting plate and a lower end plate, wherein the anode current collecting plate and the cathode current collecting plate are respectively arranged at the upper end and the lower end of the battery pack;
the upper end plate, the anode current collecting plate, the battery pack, the cathode current collecting plate, the insulating plate, the supporting plate and the lower end plate are sequentially stacked and arranged from top to bottom and are fastened into a whole through a binding band, and clamping grooves matched with the binding band are formed in the outer surfaces of the upper end plate and the lower end plate;
the left end and the right end of the upper end plate are provided with water and gas connecting ports;
the battery pack comprises a plurality of single battery packs, each single battery pack comprises a membrane electrode and a bipolar plate, and a sealing ring is arranged between the membrane electrode and the bipolar plate;
the bipolar plate comprises a plate body, wherein gas-liquid ports correspondingly communicated with the water-gas connecting ports are formed in two ends of the plate body; a working flow field area is arranged on the plate body, flow field distribution areas are arranged at two ends of the working flow field area, and a plurality of flow guide strips are arranged in the flow field distribution areas.
2. The high power hydrogen fuel cell stack according to claim 1, wherein: and bending pieces are arranged on two sides of the positive current collecting plate and the negative current collecting plate and are attached to the side wall of the upper end plate or the supporting plate and fixed on the upper end plate or the supporting plate through bolts.
3. A high power hydrogen fuel cell stack according to claim 1, wherein: a buffer gasket is arranged between the supporting plate and the lower end plate.
4. The high power hydrogen fuel cell stack according to claim 1, wherein: the flow guide strip comprises a first horizontal section body, a vertical section body and a second horizontal section body which are sequentially connected, and two ends of the vertical section body are respectively arranged at right angles with the first horizontal section body and the second horizontal section body; the first horizontal segment body, the vertical segment body and the second horizontal segment body are continuous or discontinuous.
5. A high power hydrogen fuel cell stack according to claim 1, wherein: and a plurality of columnar bulges are arranged at the junction of the working flow field area and the flow field distribution area.
6. A high power hydrogen fuel cell stack according to claim 5, wherein: the columnar bulges are round-corner rectangular columnar bulges or cylindrical bulges.
7. A high power hydrogen fuel cell stack according to claim 1, wherein: and runners are arranged in the working flow field area and comprise straight runners and waveform runners, wherein the straight runners are positioned in the areas, close to the flow field distribution area, on the two sides of the working flow field area, and the waveform runners are positioned in the middle area of the working flow field area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221793650.2U CN217768433U (en) | 2022-07-12 | 2022-07-12 | High-power hydrogen fuel cell stack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221793650.2U CN217768433U (en) | 2022-07-12 | 2022-07-12 | High-power hydrogen fuel cell stack |
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| CN217768433U true CN217768433U (en) | 2022-11-08 |
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| CN202221793650.2U Active CN217768433U (en) | 2022-07-12 | 2022-07-12 | High-power hydrogen fuel cell stack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115020730A (en) * | 2022-07-12 | 2022-09-06 | 青岛创启信德新能源科技有限公司 | High-power hydrogen fuel cell stack and assembling method thereof |
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- 2022-07-12 CN CN202221793650.2U patent/CN217768433U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115020730A (en) * | 2022-07-12 | 2022-09-06 | 青岛创启信德新能源科技有限公司 | High-power hydrogen fuel cell stack and assembling method thereof |
| CN115020730B (en) * | 2022-07-12 | 2024-01-30 | 青岛创启信德新能源科技有限公司 | High-power hydrogen fuel cell stack and assembly method thereof |
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