CN112186213B - Improved structure of flow channel plate of fuel cell stack - Google Patents
Improved structure of flow channel plate of fuel cell stack Download PDFInfo
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- CN112186213B CN112186213B CN201910591243.XA CN201910591243A CN112186213B CN 112186213 B CN112186213 B CN 112186213B CN 201910591243 A CN201910591243 A CN 201910591243A CN 112186213 B CN112186213 B CN 112186213B
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- runner plate
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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
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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
- H01M8/0263—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
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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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to an improved structure of a runner plate of a fuel cell stack, in particular to a runner plate which can be applied to a stack cell stack or a flat cell stack, and adopts a non-single plate structure design to be used as a runner plate distributed with a single-snake runner or multiple-snake runners; the runner plate is formed by an outer runner plate, an inner runner plate and a runner bottom plate; the surface of the outer runner plate is provided with a plurality of linear or nonlinear runners in a penetrating way, and the runners are arranged at intervals; the surface of the inner runner plate is provided with a plurality of gathering holes which are arranged at intervals corresponding to the starting end and the tail end of the runner arranged on the outer runner plate, and the gathering holes are formed by mutually and correspondingly overlapping runner bottom plates; the confluence holes of the inner runner plate are overlapped under the configuration of the starting end and the tail end of the outer runner plate in a spanning way, so that the runners and the confluence holes form a common snake-shaped channel; the number of the snake passages can be correspondingly set according to the number of the distributed passages and the length and the number of the distributed collecting holes, so that the purpose of planning single-snake or multi-snake passages can be achieved.
Description
Technical Field
The invention provides an improved structure of a runner plate of a fuel cell stack, in particular to a novel structural design of a runner plate which is formed by adopting a non-single plate to form a runner plate capable of being used as a single-snake runner or a plurality of snake runners by using a 2D processing technology to realize forming and achieve the purpose of reducing the manufacturing cost.
Background
Currently, the general fuel cell in the market is composed of a stack cell stack or a flat cell stack in most of its internal structure; the flow channel plate used in the device can be divided into two types of unipolar or bipolar according to the use requirement; the unipolar flow channel plate or the bipolar flow channel plate is made of conductive materials such as graphite, metal and the like, and the flow channels arranged on the surfaces of the unipolar flow channel plate or the bipolar flow channel plate are in a continuous single-snake or multi-snake winding mode and are integrated into a single-plate body; when the method is implemented, under the condition that the flow field pressure drop is in direct proportion to the use area, when the fuel cell stack with the larger use area cannot use a single snake flow channel, the proton exchange membrane is cracked or the power consumption of the system is increased due to the too large flow field pressure drop, and the flow channel needs to be made into a shape which is bypassed by using a 3D processing technology by using high-precision stamping and the like during the manufacturing, and the flow channel is finished under the requirements of accurately controlling the depth, the height, the width and the like of the flow channel, so that the defects of high manufacturing cost, various difficulties and the like exist; now, the present invention is further familiar with the structure of the prior unipolar or bipolar flow channel plate and the drawbacks of the prior art in the stacked cell stack or the flat cell stack, and the following examples are given:
first, referring to fig. 1 to 3, a unipolar flow channel plate 10 generally applied to a flat cell stack or a stacked cell stack is disclosed, which is a single plate made of conductive materials such as graphite and metal and having a flow channel 101 on a surface of a cross-sectional area thereof for gas to flow through; the flow channel 101 is a continuous single-snake or multi-snake winding distribution, has depth and width, and is formed by 3D technology; FIG. 4 is a cross-sectional side view of a conventional bipolar flow channel plate commonly used in a flat cell stack or a stacked cell stack; the bipolar runner plate 20 is a single plate made of conductive materials such as graphite and metal, and has runners 201, 201' on the upper and lower surfaces of its cross-sectional area for gas to flow through; the runners 201, 201' may be a continuous single or multiple serpentine, have a depth and a width, and need to be formed by 3D processing.
By means of the components, the unipolar or bipolar runner plate has the following disadvantages when being implemented:
1. the surface of the unipolar or bipolar flow passage plate which is integrally formed is provided with a continuous single-snake or multi-snake winding flow passage, and the depth, height, width and other dimensions of the flow passage plate are finished under the requirement of higher precision under the matching of high-precision stamping, hydraulic pressure and other 3D processing technologies, so that high manufacturing cost and difficulty are caused.
2. The flow channels carved on the surface of the unipolar or bipolar flow channel plate, especially the fuel cell stack with the bigger area, can not use a single snake, because the pressure drop of the flow field is too large, the proton exchange membrane is cracked or the power consumption of the system is increased.
In summary, the above-mentioned shortcomings and drawbacks of the monopolar or bipolar flow channel plates used in the conventional stacked cell stack or flat cell stack are clearly demonstrated, and it is necessary to provide specific innovative solutions to meet the needs of industry advancement and further provide more choices for users.
Disclosure of Invention
The invention mainly aims to provide an improved structure of a runner plate of a fuel cell stack; the composite material is formed by adopting non-single-plate components, and each non-single-plate component can be formed by punching by using a common 2D processing technology, so that the manufacturing cost is reduced.
Another objective of the present invention is to provide an improved structure of a flow channel plate of a fuel cell stack; the runner plate can be distributed in a single-snake runner or a plurality of snake runners in parallel, and can be formed by punching by a common 2D processing technology, thereby achieving simple construction and reducing the manufacturing cost.
Another objective of the present invention is to provide an improved structure of a flow channel plate of a fuel cell stack; the flow passage plate can be implemented in a flat cell stack or a stacked cell stack to achieve a plurality of wide applications.
In order to achieve the above object, the present invention provides the following technical means and schemes:
the invention relates to an improved structure of a runner plate of a fuel cell stack, which aims to solve the defect of high manufacturing cost in the prior art, the runner plate adopts a non-single plate structure and is formed by mutually stacking an outer runner plate, an inner runner plate and a runner bottom plate; the outer runner plate, the inner runner plate and the runner bottom plate can be punched or stamped by common 2D processing technology.
The invention relates to an improved structure of a runner plate of a fuel cell stack, wherein the surface of the runner plate can be implemented by a single-snake runner or a plurality of snake runners; the number of the single or multiple snakes is determined by the number of linear or non-linear flow channels arranged on the outer flow channel plate and the number and length of the manifold holes arranged on the inner flow channel plate, which are formed by the corresponding stacking.
Drawings
Fig. 1 is a perspective view of a conventional unipolar flow field plate.
Fig. 2 is a front view of a prior art unipolar flow field plate.
Fig. 3 is a schematic side sectional view of a conventional unipolar flow field plate.
Fig. 4 is a side sectional view of a conventional bipolar runner plate.
Fig. 5 is a schematic perspective assembly view of a unipolar flow field plate according to the present invention.
Fig. 6 is a front assembly view of the unipolar flow field plate of the present invention.
Fig. 7 is a schematic side sectional view of a unipolar flow field plate of the present invention.
FIG. 8 is a schematic perspective view of another unipolar flow field plate of the present invention
Fig. 9 is a schematic fluid flow diagram of a unipolar flow field plate of the present invention.
Fig. 10 is a perspective view of the bipolar flow channel plate according to the present invention.
Fig. 11 is a front view of the bipolar flow field plate of the present invention.
Fig. 12 is a schematic side sectional view of a bipolar flow field plate according to the present invention.
Fig. 13 is a schematic view showing the flow direction of the fluid in the bipolar channel plate according to the present invention.
Fig. 14 is a schematic diagram of the assembly of unipolar or bipolar flow field plates according to the present invention in the form of a linearly programmed single-snake or multi-snake flow field.
Fig. 15 is a schematic diagram of the assembly of unipolar or bipolar flow channel plates in a non-linear programming single-snake flow channel.
Description of reference numerals:
(10, 20) flow field plate
(101, 201') flow channel
(1, 2) flow channel plate
(11, 11') outer flow path plate
(111, 111') flow channel
(112, 112') orifice
(12, 12') inner flow path plate
(121, 121') left inflow hole
(122, 122 ', 124') manifold holes
(123, 123') Right Outlet hole
(13) Flow channel bottom plate
(131, 132) Via hole
Detailed Description
While the spirit and manner of the invention have been described in detail and illustrated in the drawings, it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as taught herein.
The invention relates to an improved structure of runner plate of fuel cell pile, especially a runner plate structure used in flat plate cell pile or stack cell pile, which can be divided into unipolar runner plate and bipolar runner plate according to the requirement; first, referring to fig. 5 to 7, the unipolar flow channel plate 1 of the present invention is composed of an outer flow channel plate 11, an inner flow channel plate 12 and a flow channel bottom plate 13, which are mutually combined; the outer flow channel plate 11 is a cross-sectional surface with a plurality of flow channels 111 arranged at intervals, and the flow channels 111 may be linear, such as straight lines, or non-linear (such as arc lines), please refer to fig. 8, and have depth, height and width for supplying fuel (H)2) Or an oxidizing agent (O)2) Waiting for fluid circulation; the inner flow path plate 12 is formed by a plurality of left inlet holes 121, manifold holes 122, 124 and right outlet holes 123 which are arranged at intervals on the surface of the same cross-sectional area as the outer flow path plate 11, and are formed with a depth, a height and a width, and are respectively and correspondingly formed at both sides of the flow path 111 of the outer flow path plate 11; wherein the gathering holes 122, 124 are disposed on the flow channel 111 corresponding to the beginning and end of the flow channel 111 to form a state of being communicated with each other; the flow path bottom plate 13 has through holes 131 and 132 formed on the same cross-sectional surfaces of the outer flow path plate 11 and the inner flow path plate 12, respectively, and corresponds to the left inlet hole 121 and the right outlet hole 123 of the inner flow path plate 12, respectively.
When the unipolar flow channel plate 1 composed of the above-described members is implemented, please refer to fig. 9, when fuel (H) is used2) Or an oxidizing agent (O)2) When the fluid enters the unipolar flow channel plate 1, the fuel or oxidant (H)2Or O2) The fluid flows into the left inflow hole 121 of the inner flow field plate 12 and the flow field 111 of the outer flow field plate 11 in sequence through the air inlet holes 131 of the flow field bottom plate 13, and waits for the fuel (H)2) Or an oxidizing agent (O)2) When the fluid passes through the other end of the flow channel 111, the fluid enters the collecting hole 124 and flows across to the next flow channel 111, and so on until the last right outflow hole 123, and flows out through the outflow through hole 132 to complete a flow.
Referring to fig. 10 to 11, the bipolar flow channel plate 2 of the present invention is a unipolar flow channel plate 1 formed by an outer flow channel plate 11, an inner flow channel plate 12 and a flow channel bottom plate 13, wherein the outer side of the unipolar flow channel plate 1 is formed by sequentially stacking an inner flow channel plate 12 'and an outer flow channel plate 11' from inside to outside so as to be mutually stacked;
the unipolar flow channel plate 1 includes:
an outer flow channel plate 11, which is a cross-sectional surface through which a plurality of flow channels 111 are arranged at intervals, and the flow channels 111 are linear, such as straight lines, or non-linear (such as arc lines), and have depth, height and width settings for supplying fuel (H)2) Or an oxidizing agent (O)2) The fluid flows through the flow holes 112 corresponding to the outer edges of the area distributed by the flow channel 111;
an inner flow channel plate 12, which is formed by a plurality of left inlet holes 121, manifold holes 122, 124 and right outlet holes 123 with spacing, depth, height and width on the surface of the same cross-sectional area as the outer flow channel plate 11, and the manifold holes 122, 124 can be arranged on the flow channel 111 of the outer flow channel plate 11; wherein the bus holes 122, 124 are disposed corresponding to the beginning and end of the flow channel 111 to form a state of being communicated with each other;
a flow passage bottom plate 13, which is provided with through holes 131 respectively passing through the corners of the same cross-sectional area as the outer flow passage plate 11 and the inner flow passage plate 12, and respectively corresponding to the left inlet hole 121 and the right outlet hole 123 of the inner flow passage plate 12 and the flow hole 112 of the outer flow passage plate 11.
The inner flow passage plate 12 ' is additionally arranged outside the unipolar flow passage plate 1, and a plurality of left inlet holes 121 ', manifold holes 122 ', 124 ' and right outlet holes 123 ' which are arranged at intervals, with depth, height and width are respectively formed on the surface of the same sectional area; the left inflow hole 121 'and the right outflow hole 123' are disposed to correspond to the through hole 131 defined in the flow path bottom plate 13 of the unipolar flow path plate 1.
The outer flow channel plate 11 'is disposed outside the inner flow channel plate 12', and a plurality of flow channels 111 'with a distance, a depth, a height and a width are arranged on the surface of the cross-sectional area of the inner flow channel plate 12' and are distributed, and the flow channels 111 'are matched with the outer flow channel plate 11 of the unipolar flow channel plate 1 to be linear, such as straight line, or nonlinear (such as arc line), and corresponding flow holes 112' are arranged at the edge of the area distributed by the flow channels 111 'and are butted with the left flow inlet hole 121' and the right flow outlet hole 123 'of the inner flow channel plate 12'.
When the bipolar flow channel plate 2 composed of the above-mentioned components is implemented, as shown in fig. 13, when fuel enters the bipolar flow channel plate 2, the fuel (H) is generated2) And an oxidizing agent (O)2) The fuel (H) independently enters from the flow holes 112 'of the outer flow passage plate 11' and the flow holes 112 of the outer flow passage plate 11 of the unipolar flow passage plate 1 to both sides of the bipolar flow passage plate 22) And an oxidizing agent (O)2) Circulated and then supplied with fuel (H)2) Or an oxidizing agent (O)2) The flow enters the collecting holes 122 and 124 of the corresponding unipolar flow channel plate 1 and then crosses over the flow channel 111 to flow, and enters the collecting holes 122 and 124 at the other end to cross over the next flow channel 111, and then flows to the last flow channel 111 and flows out through the flow holes 112 and 112' respectively to complete a flow process.
The invention relates to an improved structure of a flow channel plate of a fuel cell stack, in order to further understand that the design function of various flow channels can be changed according to the requirement, and the purpose of planning a single-snake flow channel or a multi-snake flow channel is achieved, the flow path planning embodiments of the linear (such as straight line) single-snake flow channel, two-snake flow channel and three-snake flow channel are particularly mentioned, please refer to fig. 14, the flow channel plate 1 is mainly distributed and arranged by a plurality of flow channels 111 which are arranged in depth and width by penetrating through the surface of the cross section of an outer flow channel plate 11, the flow channels 111 are linear, such as straight line, and the like, and are arranged in distance with the surface of an inner flow channel plate 12, and are provided with a plurality of collecting holes 122 and 124 arranged in depth and width, and the collecting holes are correspondingly and mutually overlapped; the above-mentioned gathering holes 122, 124 are configured to correspond to the beginning and the end of the flow channel 111, so as to form a state of being communicated with each other, and the gathering holes 122, 124 can be spanned over the flow channel 111; the length and number of the bus holes 122, 124 can be configured according to the number of snakes required by the user and the length and number of the flow channel 111, such as the single-snake flow channel, which is only one flow channel passing through the flow channel 111, and the traveling path is indicated by the diagonal line in the figure; the two snake runners pass through the runner 111 as two runners, and the running path of the two snake runners is indicated by oblique lines and reverse oblique bar marks in the figure; the three-snake runner passes through the runner 111 as three runners, the traveling path of the three-snake runner is shown by oblique lines, reverse oblique bars and X-line marks in the figure, and the lengths and the number of the runners 111 and the left and right bus holes 122 and 124 are changed by parity of reasoning so as to complete the multi-snake runner planning design with preset requirements.
Referring to fig. 15, a nonlinear (e.g., arc) runner is formed on the surface of the cross-sectional area of the outer runner plate 11, and a plurality of bus holes 122, 124 are formed on the surface of the inner runner plate 12, and have a certain distance therebetween and a certain depth and width, and are stacked correspondingly; the above-mentioned gathering and discharging holes 122, 124 are respectively configured to correspond to the beginning and the end of the flow channel 111, so as to form a state of being capable of being communicated with each other, and the gathering and discharging holes 122, 124 can be spanned over the flow channel 111, as shown in the embodiment of the figure, a single-snake-winding flow channel plate is provided, only one flow channel passes through the flow channel 111, and the running path is indicated by oblique lines in the figure.
Claims (2)
1. A kind of fuel cell pile flow field plate improved structure, it is the flow field plate that can be implemented in the flat cell pile or the pile type cell pile, characterized by that, the flow field plate, by a outer flow field plate, a inner flow field plate and a flow field bottom plate are overlapped each other and set up and form together;
the outer runner plate is formed by a plurality of runners which are arranged at intervals and penetrate through the surface of a sectional area, and the runners which penetrate through the surface of the sectional area can be linear or nonlinear;
the inner runner plate is provided with a plurality of left inflow holes, a plurality of right outflow holes and a plurality of right inflow holes which are arranged at intervals and are respectively penetrated through the surface of the cross section which is equal to the outer runner plate, and the left inflow holes, the right outflow holes and the right inflow holes are respectively arranged on the two sides of the runner of the outer runner plate in a corresponding mode; wherein the header hole and the tail end of the header hole are arranged on the flow channel in a spanning manner corresponding to the start end and the tail end of the flow channel to form a state of mutual communication;
the runner bottom plate is provided with through holes respectively penetrating through the surfaces of the same sectional areas of the outer runner plate and the inner runner plate.
2. An improved structure of runner plate of fuel cell pile is characterized in that it is a runner plate which can be applied to flat cell pile or stack cell pile; the runner plate is formed by mutually overlapping an outer runner plate, an inner runner plate and a runner bottom plate;
the outer runner plate is formed by a plurality of runners which are arranged at intervals and penetrate through the surface of a sectional area, and the runners which penetrate through the surface of the sectional area can be linear or nonlinear;
the inner runner plate is provided with a plurality of left inflow holes, a plurality of right outflow holes and a plurality of collecting holes which are arranged at intervals and are respectively penetrated through the surface of the cross section which is equal to that of the outer runner plate, and the inner runner plate and the outer runner plate are respectively arranged on two sides of the runner of the outer runner plate in a corresponding way; wherein the header hole and the tail end of the header hole are arranged on the flow channel in a spanning manner corresponding to the start end and the tail end of the flow channel to form a state of mutual communication;
the runner bottom plate is provided with through holes respectively penetrating through the surfaces of the cross sections equal to the outer runner plate and the inner runner plate;
an inner flow passage plate and an outer flow passage plate are sequentially arranged on the outer side of the flow passage plate from inside to outside to mutually form the flow passage plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910591243.XA CN112186213B (en) | 2019-07-02 | 2019-07-02 | Improved structure of flow channel plate of fuel cell stack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910591243.XA CN112186213B (en) | 2019-07-02 | 2019-07-02 | Improved structure of flow channel plate of fuel cell stack |
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| CN112186213A CN112186213A (en) | 2021-01-05 |
| CN112186213B true CN112186213B (en) | 2022-07-15 |
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| CN102237542A (en) * | 2010-04-23 | 2011-11-09 | 中兴电工机械股份有限公司 | Design method for main runner of fuel cell stack and fuel cell stack structure |
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| CN108258261A (en) * | 2018-01-10 | 2018-07-06 | 天津大学 | A kind of variable cross-section fuel cell channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7550221B2 (en) * | 2003-10-29 | 2009-06-23 | Rolls-Royce Fuel Cell Systems Limited | Gas delivery substrate |
| US10170786B1 (en) * | 2016-12-22 | 2019-01-01 | National Taipei University Of Technology | Modular planar interconnect device for a solid oxide fuel cell and the solid oxide fuel cell containing the same |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100342196C (en) * | 2001-12-21 | 2007-10-10 | 贝洱两合公司 | Heat exchanger, particularly for a motor vehicle |
| JP2006309964A (en) * | 2005-04-26 | 2006-11-09 | Toyota Motor Corp | Fuel cell |
| CN102237542A (en) * | 2010-04-23 | 2011-11-09 | 中兴电工机械股份有限公司 | Design method for main runner of fuel cell stack and fuel cell stack structure |
| CN105247106A (en) * | 2013-02-08 | 2016-01-13 | Ird燃料电池公司 | Composite flow plate for electrolytic cell |
| CN206697552U (en) * | 2017-04-12 | 2017-12-01 | 中国石油大学(华东) | A kind of fuel battery double plates in hybrid architecture flow field |
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