CN117117279A - Single cell module, large-scale fuel cell stack based on single cell module and integration method of large-scale fuel cell stack - Google Patents
Single cell module, large-scale fuel cell stack based on single cell module and integration method of large-scale fuel cell stack Download PDFInfo
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- CN117117279A CN117117279A CN202310951640.XA CN202310951640A CN117117279A CN 117117279 A CN117117279 A CN 117117279A CN 202310951640 A CN202310951640 A CN 202310951640A CN 117117279 A CN117117279 A CN 117117279A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000446 fuel Substances 0.000 title claims abstract description 23
- 230000010354 integration Effects 0.000 title abstract description 8
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 230000003213 activating effect Effects 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 210000001503 joint Anatomy 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004806 packaging method and process Methods 0.000 abstract description 3
- 238000004886 process control Methods 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 3
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000001994 activation Methods 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
Classifications
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
- H01M8/2475—Enclosures, casings or containers of fuel cell stacks
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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
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
-
- 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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
-
- 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2404—Processes or apparatus for grouping 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 invention discloses a single cell module, a large-scale fuel cell stack based on the single cell module and an integration method thereof, wherein the module is formed by superposing a plurality of single cells, and the single cells are connected and fixed through hollow inserts; the electric pile comprises a plurality of groups of single cell modules, and a cathode tail plate, a cathode mounting plate, an anode mounting plate and an anode tail plate are arranged on the upper part and the lower part of the single cell modules during integration to form a short pile; pre-pressing the short stack, pre-activating the short stack, detecting performance, sequentially superposing a plurality of single cell modules which are qualified in detection, pressurizing and packaging. The single cell module is used as a unit module, so that the number of components of a stack can be greatly reduced, and the reliability of a stacking process is improved; on the other hand, the quality problem of the single cells can be found and replaced in a module stage in time, the consistency of the single cell performance among each module is ensured, the single cell modules have structural independence, and the production, storage and unstacking process control is facilitated through the traceability code of each module.
Description
Technical Field
The invention belongs to a high-power fuel cell stack integration technology exceeding 500kW, and particularly relates to a single cell module, a large-scale fuel cell stack based on the single cell module and an integration method thereof.
Background
The single cell is the basic unit of the stack and comprises a set of bipolar plate assemblies and a set of membrane electrodes, as well as the required sealing rings, or referred to as a three-in-one assembly. The design of single cells is to reduce the number of components in the stacking process, so that quality control in the stacking process and consistency of performance among single cells are facilitated. The single cell can be used as one of a semi-finished product and an important component in the production process. The single cell process is a popular integration process at present, but is applicable to low-power stacks below 100 kw.
However, with the requirements of the market for the improvement of the power of the electric pile, especially for the electric pile with ultra-high power, for example, more than one thousand groups of electric piles with 500 kilowatts, the process of taking the single cell assembly as the basic stack unit is too complicated, and fatal quality defects are easily introduced due to fatigue of personnel. In addition, quality defects from the raw materials only appear during the activation process after the completion of the galvanic pile, but cannot be judged both before and during the stacking process. Once a large difference in performance between cells is found during activation or testing and begins to affect the performance of the stack, the problem cell must be replaced. The replacement process requires careful handling of the individual cells of the stack for placement in the wire side library. Because of the large number of cells, the entire disassembly and replacement process is prone to introducing new failure factors, so that one disassembly is not enough to solve all quality problems, and repeated disassembly and assembly (up to 5 times) can cause degradation of the stack performance.
Disclosure of Invention
The invention aims to: the technical problem to be solved by the invention is to provide a single cell module, which reduces the number of basic units in the stacking process, improves the reliability of the stacking process, avoids the side effect of unstacking after a large-scale fuel cell stack is assembled by single cells, has structural independence, and is convenient for production, storage and unstacking process control by the traceability code of each single cell module.
The technical scheme is as follows: the single cell module is formed by superposing a plurality of groups of single cells, and the groups of single cells are connected and fixed through hollow inserts;
the hollow insert comprises an outer sleeve and an inner sleeve matched with the outer sleeve, the end surfaces of the outer sleeve and the inner sleeve are respectively provided with a barrel cover so as to respectively fix the uppermost polar plate and the lowermost polar plate of the single cell module, the inner sleeve is internally provided with a tensioning member for connecting the outer sleeve and the inner sleeve, and the barrel covers of the outer sleeve and the inner sleeve are respectively provided with an anchor piece matched with the tensioning member.
Further, a jack is formed in the position, far away from the active area and the sealing area, of the single battery module, the hollow insert is arranged in the jack, and the thickness of a cylinder cover of the hollow insert is smaller than that of the single battery pole plate.
Further, the upper cylinder cover and the lower cylinder cover of the single cell module hollow insert are matched with each other in a male-female butt joint mode.
Further, the outer sleeve of the hollow insert of the cell module is tightly attached to the insertion hole so that the groups of cells are aligned with each other, and the lengths of the outer sleeve and the inner sleeve are shorter than the height of the pre-compressed cell module.
Further, the anchoring member of the single cell module is a pin or an anchor, the pin or the anchor is arranged on the cylinder cover, and the tensioning member is a spring or an elastic band.
Further, the outer sleeve and the barrel cover of the inner sleeve of the single cell module are provided with notches for arranging anchoring parts.
Furthermore, the end surfaces of the upper and lower polar plates of the single cell modules are matched in a concave-convex butt joint mode, so that butt joint among a plurality of single cell modules is realized.
The large-scale fuel cell pile comprises a plurality of groups of single cell modules, and a cathode tail plate, a cathode mounting plate, an anode mounting plate and an anode tail plate which are arranged above and below the single cell modules.
The method for integrating the large fuel cell stack comprises the following steps:
(1) Sequentially superposing a plurality of groups of single cells and adopting a hollow insert for connection and fixation to form a single cell module;
(2) A cathode tail plate, a cathode mounting plate, an anode mounting plate and an anode tail plate are arranged on the upper part and the lower part of the single cell module so as to form a short stack;
(3) Pre-pressing the short stack, and pre-activating and detecting the performance of the short stack; the single cell module with the up-to-standard single cell consistency performance is reserved; detecting and rejecting the problem single cells, and re-stacking to perform preactivation and performance detection until the performance of all single cell modules meets the preset requirement;
(4) And after a plurality of groups of single cell modules meeting the preset requirements are sequentially overlapped, arranging a cathode tail plate, a cathode mounting plate, an anode mounting plate and an anode tail plate on the upper part and the lower part of the single cell modules, and pressurizing the single cell modules to reach the whole stack preset stack loading pressure of the large-scale fuel cell stack, thereby completing stack encapsulation.
Further, the pressure of the short pile pre-compression adopted in the integration method is 25-95% of the total pile pre-set pile loading pressure.
The beneficial effects are that: compared with the prior art, the invention has the remarkable advantages that: the single cell module is used as a unit module to be applied to a large-scale fuel cell stack, so that on one hand, the number of parts of the stack can be greatly reduced, and the reliability of the stacking process is improved; on the other hand, the single cell module is preactivated before stacking, so that the quality problem of single cells can be found and replaced in a module stage in time, the consistency of single cell performance among all modules is ensured, the primary success rate of a large-scale fuel cell stack is improved, the side effect of unstacking after stacking the problem single cells is avoided, the single cell module has structural independence, and the production, storage and unstacking process control is facilitated through the traceability code of each module.
In addition, the single cell module is connected and fixed by adopting the hollow insert, so that the alignment among single cells is ensured, and the hollow insert adopting the structure can effectively avoid the compression interference of an anchor piece on a short stack, thereby further improving the reliability and success rate of stacking the single cell module to form a large-scale fuel cell stack.
Drawings
Fig. 1 is a schematic structural view of a battery cell module according to the present invention;
FIG. 2 is a front view of a hollow insert employed in the present invention;
FIG. 3 is a cross-sectional view of a hollow insert employed in the present invention;
FIG. 4 is a schematic view of a short stack formed in accordance with the present invention;
fig. 5 is a process flow diagram of the present invention in which 50 sets of single cells are integrated into a single cell module.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings.
The large-scale fuel cell stack comprises a plurality of groups of single cell modules, and a cathode tail plate, a cathode mounting plate, a single cell module, an anode mounting plate and an anode tail plate which are arranged up and down on the plurality of groups of single cell modules.
As shown in fig. 1, the single cell module of the present invention is formed by stacking a plurality of groups of single cells 1, and the single cells 1 are connected and fixed by a hollow insert 2, the hollow insert 2 is located in a jack provided at a position of the single cell module far away from an active area and a sealing area, and the single cells 1 are fixed in one module by the arrangement of the hollow insert 2.
As shown in fig. 2 and 3, the hollow insert 2 includes an outer sleeve 3 disposed closely to the receptacle so that several sets of cells are aligned with each other, an inner sleeve 4 disposed in cooperation with the outer sleeve 3, and a tension member 6 connecting the outer sleeve 3 and the inner sleeve 4, the tension member 6 being a spring or an elastic band. When a group of cell modules is compressed, the inner sleeve 4 slides within the outer sleeve 3, and the lengths of the outer sleeve 3 and the inner sleeve 4 are shorter than the height of the compressed cell modules, so that the hollow insert 2 does not interfere with the compression of the cell modules.
Since the outer sleeve 3 ensures alignment of the cells (the inner sleeve 4 has clearance and room must be left for cell module compression), inserts can be used at both the four corners of the cell plates and the plate edges. Preferably, each cell module is fixed using only two hollow inserts 2, so upper and lower cell modules may use different combinations of hollow inserts 2 (e.g., the insert diagonal intersection of the upper cell module corresponds to the diagonal intersection of the lower cell module hollow inserts 2). And the hollow inserts 2 (sleeve and pin or anchor) employed in the present invention are made of a non-conductive material, such as plastic, to avoid electrical shorting of the cells.
Furthermore, the end surfaces of the outer sleeve 3 and the inner sleeve 4 are each provided with a cap 5 to fix the uppermost and lowermost electrode plates of the single cell module, respectively, and are connected and fixed by a tension member 6. And the thickness of the cylinder cover 5 is smaller than that of the battery cell polar plate, so that the cylinder cover 5 does not influence the matching between the upper battery cell module and the lower battery cell module in a large stack.
The hollow insert 2 further comprises an anchor element 7 arranged in cooperation with the tensioning member 6, which anchor element 7 may preferably be a pin or an anchor, and the covers 5 of the outer sleeve 3 and the inner sleeve 4, respectively, are provided with notches for receiving the anchor element 7. The sleeve cover 5 of the outer sleeve 3 and the sleeve cover 4 are arranged in a male-female butt joint mode, and the end faces of the upper polar plate and the lower polar plate of the single cell module are matched in a concave-convex butt joint mode, so that effective butt joint among a plurality of single cell modules is realized.
The method for integrating the large fuel cell stack comprises the following steps:
(1) Sequentially superposing a plurality of single cells 1 and adopting a hollow insert for connection and fixation to form a single cell module;
(2) A cathode tail plate 8, a cathode mounting plate 9, an anode mounting plate 10 and an anode tail plate 11 are arranged on the upper and lower sides of the single cell module to form a short stack, as shown in fig. 4;
(3) Pre-pressing the short stack, and pre-activating and detecting the performance of the short stack; the short stack module with the consistency performance reaching the standard of the single cells is reserved; detecting and rejecting the problem single cells, and re-stacking to perform preactivation and performance detection until the performance of all single cell modules meets the preset requirement;
(4) After a plurality of groups of single cell modules are sequentially overlapped, a cathode tail plate, a cathode mounting plate, an anode mounting plate and an anode tail plate are arranged on the single cell modules and are pressurized, so that the whole stack preset stacking pressure of the large-scale fuel cell stack is achieved, and the stack packaging is completed.
In addition to the above, the single cells employed in the single cell module formed in the present invention may be 10 to 100 groups. The pressure of the short-pile pre-compression is 25-95% of the pre-set pile loading pressure of the whole pile, and can be 40-60% preferably. The activation technology adopted in the integrated method can directly adopt the existing activation technology, and the patent application does not require.
Specifically, the method for integrating 1000 groups of single-cell large-scale fuel cell stacks comprises the following steps of:
(1) Preparing 1100 groups of single cells, sequentially superposing 20 groups of single cells and adopting a hollow insert for connection and fixation to form a single cell module consisting of 20 groups of single cells, wherein the total number of the single cell modules is 50;
(2) Arranging a cathode tail plate, a cathode mounting plate, an anode mounting plate and an anode tail plate on the upper and lower sides of the single cell module to form a short stack;
(3) Pre-pressing the short stack, and pre-activating and detecting the performance of the short stack; the short stack module with the consistency performance reaching the standard of the single cells is reserved; detecting and rejecting the problem single cells, and re-stacking to perform preactivation and performance detection until the performance of all single cell modules meets the preset requirement;
(4) And after the 50 groups of single cell modules are sequentially overlapped, arranging a cathode tail plate, a cathode mounting plate, an anode mounting plate and an anode tail plate on the upper part and the lower part of the single cell modules, and pressurizing the single cell modules to achieve the whole pile preset pile loading pressure of the large-scale fuel cell pile, thereby completing pile packaging.
Claims (10)
1. A single cell module characterized in that: the module is formed by superposing a plurality of groups of single cells (1), and the single cells (1) are fixedly connected through a hollow insert (2);
the hollow insert (2) comprises an outer sleeve (3) and an inner sleeve (4) matched with the outer sleeve (3), the end surfaces of the outer sleeve (3) and the inner sleeve (4) are respectively provided with a cylinder cover (5) so as to respectively fix the uppermost pole plate and the lowermost pole plate of the single cell module, the inner sleeve (4) is internally provided with a tensioning member (6) connected with the outer sleeve (3) and the inner sleeve (4), and the cylinder covers (5) of the outer sleeve (3) and the inner sleeve (4) are respectively provided with an anchoring piece (7) matched with the tensioning member (6).
2. The cell module according to claim 1, wherein: the battery cell module is provided with a jack far away from the active area and the sealing area, the hollow insert (2) is arranged in the jack, and the thickness of a cylinder cover (5) of the hollow insert (2) is smaller than that of a battery cell polar plate.
3. The cell module according to claim 1, wherein: the upper cylinder cover (5) and the lower cylinder cover (5) of the hollow insert (2) are matched with each other in a male-female butt joint mode.
4. The cell module according to claim 2, wherein: the outer sleeve (3) of the hollow insert (2) is tightly attached to the insertion hole so that the groups of single cells (1) are aligned with each other, and the lengths of the outer sleeve (3) and the inner sleeve (4) are shorter than the height of the pre-compressed single cell module.
5. The cell module according to claim 1, wherein: the anchoring piece (7) is a pin or an anchor, and is arranged on the cylinder cover (5), and the tensioning member (6) is a spring or an elastic band.
6. The cell module of claim 5, wherein: the sleeve cover (5) of the outer sleeve (3) and the inner sleeve (4) is provided with a notch for arranging an anchor piece (7).
7. The cell module according to claim 1, wherein: the end faces of the upper polar plate and the lower polar plate of the single cell modules are matched in a concave-convex butt joint mode, so that butt joint among a plurality of single cell modules is realized.
8. A large fuel cell stack, characterized by: the stack comprises a plurality of groups of single cell modules as claimed in claim 1, and a cathode tail plate, a cathode mounting plate, an anode mounting plate and an anode tail plate which are arranged above and below the plurality of groups of single cell modules.
9. A method of integrating a large fuel cell stack in accordance with claim 8, comprising the steps of:
(1) Sequentially superposing a plurality of groups of single cells (1) and adopting a hollow insert (2) to connect and fix so as to form a single cell module;
(2) A cathode tail plate (8), a cathode mounting plate (9), an anode mounting plate (10) and an anode tail plate (11) are arranged on the upper part and the lower part of the single cell module so as to form a short stack;
(3) Pre-pressing the short stack, and pre-activating and detecting the performance of the short stack; the single cell module with the up-to-standard single cell consistency performance is reserved; detecting and rejecting the problem single cells, and re-stacking to perform preactivation and performance detection until the performance of all single cell modules meets the preset requirement;
(4) And after a plurality of groups of single cell modules meeting the preset requirements are sequentially overlapped, arranging a cathode tail plate, a cathode mounting plate, an anode mounting plate and an anode tail plate on the upper part and the lower part of the single cell modules, and pressurizing the single cell modules to reach the whole stack preset stack loading pressure of the large-scale fuel cell stack, thereby completing stack encapsulation.
10. The method of integrating a large fuel cell stack in accordance with claim 9, wherein: the pressure of the short pile pre-pressing is 25-95% of the total pile pre-set pile loading pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310951640.XA CN117117279B (en) | 2023-07-30 | 2023-07-30 | Single cell module, large-scale fuel cell stack based on single cell module and integration method of large-scale fuel cell stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310951640.XA CN117117279B (en) | 2023-07-30 | 2023-07-30 | Single cell module, large-scale fuel cell stack based on single cell module and integration method of large-scale fuel cell stack |
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| Publication Number | Publication Date |
|---|---|
| CN117117279A true CN117117279A (en) | 2023-11-24 |
| CN117117279B CN117117279B (en) | 2024-03-26 |
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| CN202310951640.XA Active CN117117279B (en) | 2023-07-30 | 2023-07-30 | Single cell module, large-scale fuel cell stack based on single cell module and integration method of large-scale fuel cell stack |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016013584A (en) * | 2014-07-01 | 2016-01-28 | 株式会社マキタ | Nut fastener |
| CN113690477A (en) * | 2021-07-20 | 2021-11-23 | 浙江天能氢能源科技有限公司 | Air cooling type fuel cell stack |
| CN114464831A (en) * | 2022-02-10 | 2022-05-10 | 北京航空航天大学 | Proton exchange membrane fuel cell stack |
| CN216951175U (en) * | 2021-12-15 | 2022-07-12 | 厦门市信意鑫工贸有限公司 | Rivet with good fastening effect |
| CN116169336A (en) * | 2023-04-20 | 2023-05-26 | 上海韵量新能源科技有限公司 | Fuel cell stack and assembly pressure adjusting method and device thereof |
-
2023
- 2023-07-30 CN CN202310951640.XA patent/CN117117279B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016013584A (en) * | 2014-07-01 | 2016-01-28 | 株式会社マキタ | Nut fastener |
| CN113690477A (en) * | 2021-07-20 | 2021-11-23 | 浙江天能氢能源科技有限公司 | Air cooling type fuel cell stack |
| CN216951175U (en) * | 2021-12-15 | 2022-07-12 | 厦门市信意鑫工贸有限公司 | Rivet with good fastening effect |
| CN114464831A (en) * | 2022-02-10 | 2022-05-10 | 北京航空航天大学 | Proton exchange membrane fuel cell stack |
| CN116169336A (en) * | 2023-04-20 | 2023-05-26 | 上海韵量新能源科技有限公司 | Fuel cell stack and assembly pressure adjusting method and device thereof |
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| Publication number | Publication date |
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| CN117117279B (en) | 2024-03-26 |
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