CN116454343A - Pile side face sealing method and pile - Google Patents
Pile side face sealing method and pile Download PDFInfo
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- CN116454343A CN116454343A CN202310594528.5A CN202310594528A CN116454343A CN 116454343 A CN116454343 A CN 116454343A CN 202310594528 A CN202310594528 A CN 202310594528A CN 116454343 A CN116454343 A CN 116454343A
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- 238000007789 sealing Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 61
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 238000002844 melting Methods 0.000 claims abstract description 15
- 230000008018 melting Effects 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 6
- 238000012544 monitoring process Methods 0.000 claims abstract description 3
- 239000002033 PVDF binder Substances 0.000 claims description 5
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 5
- 229920001169 thermoplastic Polymers 0.000 claims description 5
- 239000004812 Fluorinated ethylene propylene Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 2
- 229920009441 perflouroethylene propylene Polymers 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 239000004416 thermosoftening plastic Substances 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000017525 heat dissipation Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000002861 polymer material Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000012815 thermoplastic material 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
-
- 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
- H01M8/0276—Sealing means characterised by their form
-
- 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
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
-
- 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
-
- 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)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention provides a side face sealing method of a galvanic pile and the galvanic pile, which mainly relate to the technical field of galvanic pile sealing of a flow battery, and are used for carrying out face heating on four side faces of the galvanic pile simultaneously or sequentially, at least monitoring the temperatures at the center point and four corners of the face, and simultaneously controlling the temperatures at the center point and the four corners of the face to be between the melting temperature and the decomposition temperature of a flow frame in the galvanic pile. Along with the heating, the side surface of the liquid flow frame absorbs heat, and heat is conducted to the inner side of the liquid flow frame, the side surface of each layer of liquid flow frame and the areas, adjacent to the side surfaces, of the upper surface and the lower surface of the liquid flow frame are heated and melted, so that the areas, adjacent to the side surfaces, of the upper surface and the lower surface of the upper adjacent layer of liquid flow frame are fused with each other, then the temperature is reduced and the cooling is carried out, the sealing between the two adjacent liquid flow frames is completed, and the sealing of the side surface of the galvanic pile is completed.
Description
Technical Field
The invention mainly relates to the technical field of electric piles, in particular to a side sealing method of an electric pile and the electric pile.
Background
The flow battery pile is formed by repeatedly stacking pile components such as flow frames, wherein sealing between the flow frames is a key of pile sealing. How to keep the sealing between the liquid flow frames so that the leakage of the four sides of the electric pile does not occur is a necessary precondition for the reliable operation of the electric pile.
In a traditional flow battery pile, an elastic sealing strip is adopted for sealing between a flow frame and a flow frame, so that the cost is high, and after the pile runs for a long time, the sealing strip is easy to age and lose elasticity to cause sealing failure, pile leakage occurs, and the practical service life of the pile is influenced. How to uniformly and efficiently heat the side surface of the pile and effectively fuse the heat is a great technical difficulty to be solved in the field. When the side surface of the electric pile is heated, the heat dissipation conditions of different positions are different, and in general, the heat dissipation conditions of the middle area of the side surface of the electric pile are poor, so that heat is more easily accumulated to cause higher temperature, and the material decomposition caused by overheating of some areas can be caused to cause hot melting and failure; the heat dissipation condition of the local areas of the edges of the four sides of the side face of the electric pile is good, heat is easy to lose, the temperature is not raised enough, the adjacent liquid flow frames cannot be subjected to effective hot melting, and the hot melting and failure can be caused.
In the prior art, a laser welding mode is adopted to weld the side face of the electric pile, a laser head moves under the drive of an executing mechanism to form a line by points, and then the line is formed into a face to finish welding of the side face of the electric pile. The method has longer welding time, the laser welding surface needs to provide the pressing force applied to the side surface of the pile by using a transparent pressing device, the device and the operation are more complex, and the cost of the laser and the motion executing mechanism is higher, so that the investment cost of the production line is higher.
The 202211356776.8 patent is pressed against the side of the stack by a single heater contact glass cloth and also requires a pre-tightening pressing device applied to the side of the stack, which is relatively complex in construction. And because the temperature of the heating surface of the whole heater is consistent, the local heating power cannot be flexibly adjusted, and because the heat dissipation conditions of different local positions on the side surface of the electric pile are inconsistent, the local temperature is too high or too low, and the hot melting and the failure are caused. The heater can be removed after the side surface of the electric pile is cooled, and the cooling time is longer, so that the production period of the electric pile sealing process is longer and the production efficiency is lower.
Disclosure of Invention
The invention aims to provide a side sealing method of a galvanic pile and the galvanic pile, which solve the technical problem that the temperature of the side of the galvanic pile cannot be uniformly increased under the condition of surface heating in the prior art.
The invention discloses a side sealing method of a galvanic pile, which is characterized in that the side of the galvanic pile is heated in a zoned mode, the temperature of the center point and four corners of the side is monitored at least, and the temperature of the center point and the four corners of the side is controlled to be between the melting temperature and the decomposition temperature of a liquid flow frame in the galvanic pile by adjusting the power of a sensor adjacent to a heating element according to the monitored temperature.
The side surface of the pile is heated in a partitioning mode through the arrangement of the heating sources, and the more the partitions are, the more accurate the temperature control is.
Further, the distance between adjacent monitoring points is 1-30cm, preferably 2-20cm.
Further, the heating source for heating the surface is an array heating source.
Further, the heating source for the surface heating is a non-connected heating source.
Further, the size of the array type heating source is not smaller than the size of the side face of the electric pile.
Further, the non-contact heating source is a radiant heater or a convection heater.
Further, the wave bands used by the radiation heater comprise visible light, ultraviolet light and infrared light, and one or more sides of the galvanic pile are heated by irradiation through the radiation heater.
Further, the convection heater is a heater for providing high-temperature gas, and is used for blowing the high-temperature gas to the side face of the electric pile so as to heat the side face of the liquid flow frame.
Further, at least the temperatures at the center point and four corners of the face are monitored by non-contact temperature sensors.
Further, the non-contact temperature sensor is a non-contact infrared sensor.
Further, the melting temperature and the decomposition temperature of the liquid flow frame are related to the material of the liquid flow frame, and the liquid flow frame is made of thermoplastic polymer materials, including PTFE, FEP, PVDF, PVC, PP, PE or PMMA. The heating ranges of different thermoplastic materials are: 110-180 ℃ of PVC, 110-300 ℃ of PE, 160-350 ℃ of PP, 170-350 ℃ of PVDF, 270-400 ℃ of FEP, 320-420 ℃ of PTFE and 160-270 ℃ of PMMA.
The device can heat the side surface of the electric pile in a mode of heat radiation or hot air convection, the side surface of the electric pile is covered by the surface heating, the temperatures of different sites on the side surface of the electric pile are measured in situ in real time through a non-contact infrared temperature measuring device arranged between the array heating elements, the output power of a heating element near the temperature sensor is adjusted through a controller according to the detected temperature data, and the regional regulation and control of the output power of the heating element are realized, so that the temperatures measured by different temperature sensors are approximately the same, and the whole side surface of the electric pile is uniformly heated.
Along with the heating, the side face of the liquid flow frame absorbs heat, and meanwhile heat is conducted to the inner side of the liquid flow frame, the side face of each layer of electric pile liquid flow frame and the areas, adjacent to the side faces, of the upper surface and the lower surface of the liquid flow frame are heated and melted, and then the areas, adjacent to the side faces, of the upper surface and the lower surface of each layer of adjacent liquid flow frame are fused with each other.
Further, in the cooling process after the dough heating in the dough heating process, the upper end face and the lower end face of the electric pile are continuously and uniformly pressurized, and the pressure exerted by the end faces is 10kPa-1500kPa.
By pressurizing the upper end face and the lower end face of the galvanic pile, the upper surface and the lower surface of the upper adjacent two-layer liquid flow frame are heated and fused in the areas close to the side faces.
Further, the face heating covers at least one side face of the stack.
Further, when the face heating covers a plurality of cell stack sides, one heating source is used for each side of the cell stack.
Through using a heating source respectively with every side, a plurality of sides heat simultaneously, can improve the heating rate, make the galvanic pile sealing process more rapid, practice thrift the time that the sealing process required.
Further, the flow frame in the galvanic pile is thermoplastic plastic.
Further, the heating time is 0.5-10 minutes.
The second object of the invention is to protect a galvanic pile, sealed by the above method.
Further, the flow battery stack is formed by stacking a plurality of flow battery cells, and each flow battery cell sequentially comprises a bipolar plate, a first polarity flow frame, a first polarity porous electrode, a diaphragm, a second polarity porous electrode, a second polarity flow frame and other parts from top to bottom.
Compared with the prior art, the invention has the following beneficial effects:
1. the sealing strips needed by sealing between the original liquid flow frames are eliminated, so that the galvanic pile cost is obviously reduced; the side surface of the electric pile can be heated uniformly in 0.5-5 minutes, hot melting and sealing are completed, the production efficiency of the electric pile is improved, the required heater is cheap and easy to obtain, and the investment cost of the electric pile production line is greatly reduced; the sealing reliability is obviously improved, no leakage is caused when the reactor runs for a long time under higher fluid pressure, and the actual service life of the reactor is prolonged. And the whole heating mode is non-contact, easy to operate, easy to realize automation, and the surface of the heater can not coke, compared with contact heating, the service life of the heater is greatly prolonged, and frequent maintenance is not needed.
2. The method has the remarkable advantages of high packaging speed, high packaging reliability, low investment cost of a production line and the like, can improve the withstand voltage level of the electric pile, remarkably improve the tightness of four sides of the electric pile, does not generate the problem of leakage of the sides of the electric pile when operated under higher fluid pressure for a long time, prolongs the actual service life of the electric pile, and gets rid of the trouble of the problem of leakage of the electric pile caused by the traditional sealing strip scheme.
Drawings
FIG. 1 is a schematic diagram of a galvanic pile unit cell structure according to the invention;
FIG. 2 is a schematic diagram of the heating process of the electric pile according to the invention.
In the figure: the device comprises a 1-galvanic pile, a 2-heating source, a 3-flow battery cell, a 4-bipolar plate, a 5-first polarity flow frame, a 6-first polarity electrode, a 7-diaphragm, an 8-second polarity electrode and a 9-second polarity flow frame.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments.
Example 1
The specific structure is shown in fig. 1-2, after a pile 1 assembly with 10 flow battery cells 3 is assembled into a pile 1, the pile 1 assembly is orderly stacked, and each flow battery cell 3 in the pile 1 sequentially comprises a bipolar plate 4, a first polar flow frame 5, a first polar electrode 6, a diaphragm 7, a second polar electrode 8 and a second polar flow frame 9 from top to bottom. The electric pile 1 components are all contained by the flow frame, and the outer four sides are stacked by the flow frame.
The method comprises the steps of pressurizing the upper end face and the lower end face of a pile 1, keeping the pressure of the end face to be 100kPa, enabling each sheet of liquid flow frame to be tightly attached, sequentially heating four side faces formed by stacking the PVDF liquid flow frames of the pile 1, heating by a non-contact heating source 2, wherein the heating source 2 consists of a lattice type heating element, the side faces of the pile 1 are heated by heating elements through heat radiation, the temperature of the side faces of the pile 1 is increased, local temperature data of the side faces of the pile 1 are acquired through a non-contact sensor, the output power of the heating element near the sensor is adjusted through a controller, and power regulation and control of the split areas of the heating source array are achieved, so that the temperature of each part of the liquid flow frame of the side faces of the pile 1 is between the melting temperature and the decomposition temperature of the liquid flow frame. In this embodiment, the output power of the heating element in the vicinity of the sensor is adjusted by the controller based on the temperature detected by the temperature sensor so that the temperature of the temperature sensor is maintained in the range of 210-230 degrees for 5 minutes, so that heat is gradually transferred to the inner region of the flow frame and the temperature of the inner region of the flow frame is raised to exceed the melting temperature. Under the condition of maintaining pressure and melting, the high polymer materials of the upper and lower adjacent liquid flow frames of the liquid flow frame are mutually fused to form a sealing area. And under the action of maintaining the end face pressure, closing the heater, cooling to room temperature, and completing the sealing between the adjacent liquid flow frames. After the heating is completed, the heater can be turned off and removed, and the heater can be put into the heating sealing process of the next electric pile 1 without waiting for the cooling of the previous electric pile 1 to the room temperature. The end face pressure is kept only by a press or a fastening bolt in the cooling process of the electric pile 1, and the process does not influence the heating and sealing of the heater to the next electric pile 1, so that the production speed of the sealing process is increased, and the production efficiency is improved.
The sealing of the side surface of the electric pile 1, which is finished by the method, can completely stop the problem of leakage of the side surface of the electric pile 1, and the sealing reliability is fully proved by the fact that the pressure is maintained for 1 hour under the pressure of 1.5atm in actual measurement.
Example 2
The specific structure is shown in fig. 1-2, the pile is composed of 12 single cells, after the pile assembly is assembled into the pile, the upper end face and the lower end face of the pile are orderly stacked, the pressure of the end faces is kept to be 100kPa, four side faces formed by stacking a pile flow frame are heated simultaneously, heating is implemented by a hot air type heating component, according to the temperature detected by a non-contact temperature sensor, the output power of a heating element near the sensor is adjusted by a controller, the temperature of the side face of the pile is uniformly increased, the temperature detected by the sensor is kept at 250-280 ℃ by controlling the power of the heater, the temperature is kept for 4 minutes, the heat is gradually transferred to the inner side area of the flow frame, and the temperature of the inner side area of the flow frame is increased to exceed the melting temperature. Under the condition of maintaining pressure and melting, the high polymer materials of the upper and lower adjacent liquid flow frames of the liquid flow frame are mutually fused to form a sealing area. And under the action of maintaining the end face pressure, closing the heater, cooling to room temperature, and completing sealing.
The sealing of the side surface of the electric pile finished by the method can completely stop the problem of leakage of the side surface of the electric pile, the actual measurement is carried out under the pressure of 1.8atm, the pressure is maintained for 1 hour, the air pressure is not reduced, and the sealing reliability is fully proved.
Comparative example 3
After the pile is assembled, the pile components are stacked in order, the upper end face and the lower end face of the pile are pressurized, the pressure of the end faces is kept at 100kPa, four side faces formed by stacking PVDF liquid flow frames of the pile are heated in sequence, and the heating is implemented by a non-contact hot air heater, so that the temperature of the side faces of the pile is increased, the heating temperature is 150 ℃, and the heating time is 10 minutes. In the comparative example, the inner side region of the liquid flow frame fails to reach the melting temperature, so that the inner side region of the liquid flow frame fails to be effectively fused, the sealing fails, an effective package cannot be formed, and the leakage problem exists in the galvanic pile.
The above is an embodiment exemplified in this example, but this example is not limited to the above-described alternative embodiments, and a person skilled in the art may obtain various other embodiments by any combination of the above-described embodiments, and any person may obtain various other embodiments in the light of this example. The above detailed description should not be construed as limiting the scope of the present embodiments, which is defined in the claims and the description may be used to interpret the claims.
Claims (10)
1. A pile side face sealing method is characterized in that: and carrying out surface heating on the side surface of the electric pile (1), wherein the surface heating is partition heating, at least monitoring the temperature at the center point and the four corners of the surface, and simultaneously controlling the temperature at the center point and the four corners of the surface to be between the melting temperature and the decomposition temperature of a liquid flow frame in the electric pile (1) according to the monitored temperature.
2. A method of side sealing a galvanic pile according to claim 1, characterized in that the surface heated heating source (2) is an array heating source (2).
3. A method of side sealing a galvanic pile according to claim 1, characterized in that the surface heated heating source (2) is a non-contact heating source (2).
4. A method of side sealing a stack according to claim 1, wherein: at least the temperatures at the center point and four corners of the surface are monitored by non-contact temperature sensors.
5. A method of side sealing a stack according to claim 1, wherein: in the cooling process after dough heating in the dough heating process, the upper end face and the lower end face of the electric pile (1) are continuously and uniformly pressurized, and the pressure exerted by the end faces is 10kPa-1500kPa.
6. A method of side sealing a stack according to claim 1, wherein: the surface heating covers at least one side of the stack (1).
7. A method of side sealing a stack according to claim 1, wherein: the liquid flow frame in the galvanic pile (1) is thermoplastic plastic.
8. A method of side sealing a stack according to claim 1, wherein: the thermoplastic is PTFE, FEP, PVDF, PVC, PP, PE or PMMA thermoplastic.
9. A galvanic pile, characterized in that: sealing by a side sealing method of a galvanic pile according to any one of claims 1-8.
10. A galvanic pile according to claim 9, characterized in that the galvanic pile (1) is formed by stacking a plurality of flow battery cells (3), each flow battery cell (3) comprising, in order from top to bottom, a bipolar plate (4), a first polar flow frame (5), a first polar electrode (6), a second polar electrode (6) and a third polar electrode (6)
A diaphragm (7), a second polarity electrode (8) and a second polarity flow frame (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310594528.5A CN116454343A (en) | 2023-05-24 | 2023-05-24 | Pile side face sealing method and pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310594528.5A CN116454343A (en) | 2023-05-24 | 2023-05-24 | Pile side face sealing method and pile |
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| Publication Number | Publication Date |
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| CN116454343A true CN116454343A (en) | 2023-07-18 |
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| CN202310594528.5A Pending CN116454343A (en) | 2023-05-24 | 2023-05-24 | Pile side face sealing method and pile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117117275A (en) * | 2023-10-24 | 2023-11-24 | 四川天府储能科技有限公司 | Flow battery pile packaging method and pile thereof |
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2023
- 2023-05-24 CN CN202310594528.5A patent/CN116454343A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117117275A (en) * | 2023-10-24 | 2023-11-24 | 四川天府储能科技有限公司 | Flow battery pile packaging method and pile thereof |
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