CN115051007B - Welding method, device, system and assembly of flow battery pile assembly - Google Patents
Welding method, device, system and assembly of flow battery pile assembly Download PDFInfo
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- CN115051007B CN115051007B CN202210860507.9A CN202210860507A CN115051007B CN 115051007 B CN115051007 B CN 115051007B CN 202210860507 A CN202210860507 A CN 202210860507A CN 115051007 B CN115051007 B CN 115051007B
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- 238000003466 welding Methods 0.000 title claims abstract description 108
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 66
- 238000003825 pressing Methods 0.000 claims abstract description 32
- 230000033001 locomotion Effects 0.000 claims abstract description 15
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 28
- 239000012528 membrane Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000002952 polymeric resin Substances 0.000 claims description 5
- 229920003002 synthetic resin Polymers 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002411 adverse Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- ZRXYMHTYEQQBLN-UHFFFAOYSA-N [Br].[Zn] Chemical compound [Br].[Zn] ZRXYMHTYEQQBLN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 238000009500 colour coating Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 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
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary 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
- H01M8/2465—Details of groupings of fuel cells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The application relates to a welding method, a device, a system and a component of a flow battery pile component, wherein a flow frame and a bipolar plate or the flow frame and a diaphragm are fixed at a designated position of a vacuum suction table; placing a pressing plate above the liquid flow frame, and tightly pressing the liquid flow frame and the bipolar plate or a welding area of the liquid flow frame and the diaphragm by the dead weight of the pressing plate; and driving a linear infrared light source to perform two-dimensional motion above the welding area, and melting the heated surface of the bipolar plate or the diaphragm to be welded with the flow frame to obtain the flow battery stack. The linear infrared light source is relatively concentrated in energy, and only is welded in a welding area, so that the part of the bipolar plate or the diaphragm in the welding area is guaranteed to be heated and melted and welded with the liquid flow frame, and adverse effects on other positions are effectively avoided.
Description
Technical Field
The application relates to the technical field of flow batteries, in particular to a welding method, device, system and assembly of a flow battery electric pile assembly.
Background
The flow battery is used as novel electric power storage and energy storage equipment, has the characteristics of long service life, environmental friendliness, high safety and the like, and is mainly applied to the renewable energy power generation fields such as power grid peak shaving, wind energy, solar energy and the like, and the safety of the power grid is ensured while the stability of the power grid is improved. The device specifically comprises an all-vanadium redox flow battery, a zinc-bromine redox flow battery, an iron-chromium redox flow battery, a zinc-manganese redox flow battery, a zinc-air redox flow battery and the like.
The electrode, the diaphragm and the flow frame of the flow battery are connected together to form a galvanic pile assembly, and the connecting modes such as sealing ring adding, gluing or hot welding are mainly adopted in the market at present, wherein the sealing ring adding mode has complex structure, higher assembly difficulty and cost, difficult guarantee of gluing reliability and tightness, and influence on galvanic pile performance due to the fact that the thermal deformation or flash generated in the hot welding process is easy to damage the runner on the flow frame.
Disclosure of Invention
In view of this, the application provides a method, a device, a system and a component for welding a flow battery stack assembly, which are characterized in that energy is relatively concentrated by a linear infrared light source welding mode, and only welding is performed in a determined welding area, so that adverse effects on other positions are not easy to occur.
According to a first aspect of the present disclosure, there is provided a flow battery stack assembly welding method, comprising the steps of:
S100, fixing a liquid flow frame and a bipolar plate or the liquid flow frame and a diaphragm at a designated position of a vacuum suction table;
S200, placing a pressing plate above the liquid flow frame, and tightly pressing the liquid flow frame and the bipolar plate or a welding area of the liquid flow frame and the diaphragm by the dead weight of the pressing plate;
And S300, driving a linear infrared light source to perform two-dimensional motion above the welding area, and melting the heated surface of the bipolar plate or the diaphragm to be welded with the flow frame to obtain the flow battery electric pile assembly.
In one possible implementation manner, optionally, in step S100, fixing the flow frame and the bipolar plate, or the flow frame and the diaphragm, at a designated position of the vacuum table includes:
s110, placing the vacuum suction table on an X-Y two-dimensional motion platform;
and S120, connecting the vacuum suction table with a vacuum pump, starting the vacuum pump, and vacuum fixing the positions of the liquid flow frame and the bipolar plate or the liquid flow frame and the diaphragm through vacuum.
In a possible implementation manner, optionally, in step S100, the flow frame is made of a semitransparent polymeric resin material, specifically a PE material or a PP material, and is suitable for transmission of a linear infrared light source.
In one possible implementation, optionally, in step S100, the substrate selected for the bipolar plate or the membrane is the same as the liquid flow frame, and the surface is adapted to absorb energy of a linear infrared light source and is melted by heating.
In a possible implementation manner, optionally, in step S200, placing a pressing plate above the flow frame, and tightly pressing the flow frame and the bipolar plate or the welding area of the flow frame and the diaphragm by the self weight of the pressing plate, including:
s210, designing the shape of the pressing plate according to the shape of the flow frame flow channel, the double electrode or the diaphragm;
S220, the pressure plate which is designed and processed is directly arranged above the liquid flow frame and the bipolar plate or the liquid flow frame and the diaphragm to provide pressure for the welding area;
wherein the welding area is the area where the flow frame is connected with the bipolar plate or the flow frame is connected with the diaphragm.
In a possible implementation manner, optionally, in step S300, driving the linear infrared light source to perform two-dimensional motion in the welding area, and melting the heated surface of the bipolar plate or the diaphragm to be welded with the flow frame to obtain a flow battery stack assembly, including:
S310, the linear infrared light source reciprocates above the welding area along the X-Y direction of the welding area;
S320, the linear infrared light source passes through the liquid flow frame, irradiates to the welding area, and is melted by heating the bipolar plate or the diaphragm, so that the purpose of welding with the liquid flow frame is achieved.
According to a second aspect of the present disclosure, there is provided an apparatus for implementing the welding method of a flow battery stack assembly, including: a vacuum suction table, a vacuum pump and a two-dimensional motion platform;
The vacuum platform is arranged above the two-dimensional platform;
The vacuum platform is connected with the vacuum pump and is suitable for fixing the flow battery pile component in vacuum.
According to a third aspect of the present disclosure, there is provided a welding system of a flow battery stack assembly, comprising the apparatus of claim 7 and a light source system;
The light source system is adapted to provide energy to the welding zone.
According to a fourth aspect of the present disclosure, there is further provided a flow battery stack assembly welded based on the flow battery stack assembly welding method, including a flow frame, a membrane electrode assembly;
The center of the liquid flow frame is provided with a mounting part which is of a rectangular hollow structure, a rectangular welding part is arranged in the circumferential direction of the mounting part, and the welding part provides a welding area for the membrane electrode assembly to be heated and melted;
The liquid flow frame is also provided with a flow channel which is centrosymmetric relative to the welding part and is provided with a plurality of bends;
the membrane electrode assembly is sized to match the mounting portion.
In one possible implementation, optionally, the membrane electrode assembly comprises a bipolar plate and/or a separator;
the bipolar plate and/or separator are of the same material as the flow frame.
The technical effects are as follows:
according to the invention, the liquid flow frame, the bipolar plate or the diaphragm is fixed at a designated position in a vacuum fixing mode, the connected area is further pressed by adopting the pressing plate with certain gravity, so that the close contact of the welding area is ensured, meanwhile, the linear infrared light source is adopted to perform two-dimensional movement above the welding area, each point of the welding area can be irradiated by the infrared light source, and the energy absorption is ensured, so that the welding purpose is realized. It is to be noted that the energy of the linear infrared light source is relatively concentrated, and the linear infrared light source is only welded in the welding area, so that the part of the bipolar plate or the diaphragm in the welding area is ensured to be welded by heat fusion welding and be welded with the liquid flow frame, and adverse effects on other positions are effectively avoided.
Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features and aspects of the application and together with the description, serve to explain the principles of the application.
FIG. 1 shows a schematic flow diagram of an embodiment of a method of welding a flow cell stack assembly of the present invention;
FIG. 2 shows a schematic diagram of a welding system of a flow battery stack assembly of the present application;
FIG. 3 shows a schematic view of a flow cell stack assembly welded by the system of example 3 of the present application;
fig. 4 shows another schematic diagram of a flow cell stack assembly welded by the system of example 3 of the present application.
Detailed Description
Various exemplary embodiments, features and aspects of the application will be described in detail below with reference to the drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
It should be understood, however, that the terms "center," "longitudinal," "transverse," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the application or simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
In addition, numerous specific details are set forth in the following description in order to provide a better illustration of the application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, well known methods, procedures, components, and circuits have not been described in detail so as not to obscure the present application.
Example 1
As shown in fig. 1, according to an aspect of the present disclosure, there is provided a flow battery stack assembly welding method including the steps of:
S100, fixing a liquid flow frame and a bipolar plate or the liquid flow frame and a diaphragm at a designated position of a vacuum suction table;
The vacuum suction table is designed according to the size specification of the specific flow frame and the bipolar plate or the diaphragm, and the flow frame and the bipolar plate or the flow frame and the diaphragm are placed on the appointed position of the vacuum suction table. The flow channel is arranged on the inner side of the liquid flow frame, the bipolar plate or the diaphragm is placed in the middle of the liquid flow frame, the peripheral side of the bipolar plate or the diaphragm is attached to the liquid flow frame, and the bipolar plate or the diaphragm is placed on the vacuum suction table.
S200, placing a pressing plate above the liquid flow frame, and tightly pressing the liquid flow frame and the bipolar plate or a welding area of the liquid flow frame and the diaphragm by the dead weight of the pressing plate;
The pressing plate is arranged above the liquid flow frame and has a certain dead weight, so that the liquid flow frame and the bipolar plate or the joint surface, namely a welding area, of the liquid flow frame and the diaphragm are pressed together, and the welding area is tightly pressed together. It should be noted that, a counterweight may be added to the non-connection region between the flow frame and the bipolar plate, or between the flow frame and the diaphragm, to help the welding region to be in close contact, so as to realize reliable subsequent welding.
And S300, driving a linear infrared light source to perform two-dimensional motion above the welding area, and melting the heated surface of the bipolar plate or the diaphragm to be welded with the flow frame to obtain the flow battery electric pile assembly.
The light source used for welding adopts a linear infrared light source to do reciprocating motion above the welding area along the X-Y direction, so that each point of the welding area can be effectively ensured to be irradiated by the linear infrared light source, and the welding area can be ensured to absorb energy, and the welding is realized.
In one possible implementation manner, optionally, in step S100, fixing the flow frame and the bipolar plate, or the flow frame and the diaphragm, at a designated position of the vacuum table includes:
s110, placing the vacuum suction table on an X-Y two-dimensional motion platform;
and S120, connecting the vacuum suction table with a vacuum pump, starting the vacuum pump, and vacuum fixing the positions of the liquid flow frame and the bipolar plate or the liquid flow frame and the diaphragm through vacuum.
In one possible implementation, optionally, in step S100, the flow frame is made of a translucent polymer resin material, and is suitable for transmission of a linear infrared light source.
By selecting the semitransparent material as the material of the liquid flow frame, the linear infrared light source can penetrate through the liquid flow frame to reach the middle bipolar plate or the diaphragm, and the semitransparent high polymer resin material is particularly PE material or PP material.
In one possible implementation, optionally, in step S100, the bipolar plate or the membrane is selected from the same substrate as the flow frame, and the surface is adapted to absorb energy of a linear infrared light source and is melted by heating.
The energy of the linear infrared light source can be effectively absorbed by selecting the dark color material as the bipolar plate or the diaphragm material, and the linear infrared light source is heated and melted, so that the welding with a liquid flow frame is realized. Specifically, the polymer base material selected for the bipolar plate or the diaphragm is the same as that for the liquid flow frame, when the liquid flow frame is made of PE material, the bipolar plate or the diaphragm is also made of PE material correspondingly, and when the liquid flow frame is made of PP material, the bipolar plate or the diaphragm is also made of PE material correspondingly. If the selected diaphragm is white, the joint of the diaphragm and the liquid flow frame can be sprayed with a dark color coating in advance, so that the welding area can absorb infrared or laser energy, and the surface is melted.
In a possible implementation manner, optionally, in step S200, placing a pressing plate above the flow frame, and tightly pressing the flow frame and the bipolar plate or the welding area of the flow frame and the diaphragm by the self weight of the pressing plate, including:
s210, designing the shape of the pressing plate according to the shape of the flow frame flow channel, the double electrode or the diaphragm;
S220, the pressure plate which is designed and processed is directly arranged above the liquid flow frame and the bipolar plate or the liquid flow frame and the diaphragm to provide pressure for the welding area;
wherein the welding area is the area where the flow frame is connected with the bipolar plate or the flow frame is connected with the diaphragm.
The specific shape of the pressing plate is designed according to the dimension specifications of the liquid flow frame, the bipolar plate and the diaphragm, the structure of the pressing plate, which is in contact with one side of the liquid flow frame, is matched with the structures such as a runner and the like which are distributed in the liquid flow frame, so that a welding area can be tightly pressed when the pressing plate is placed above the liquid flow frame, and the bipolar plate or the diaphragm in the welding area is welded with the liquid flow frame on the upper layer under the action of pressure while being heated and melted under the irradiation of a linear infrared light source. Meanwhile, the pressing plate is made of transparent resin material and is suitable for the transmission of an infrared ray light source, and particularly, the pressing plate can be made of acrylic materials, PC materials and the like, so that the pressing plate designed according to the method can provide certain pressure while the transmission of the infrared ray light source is ensured, and the close contact of a welding area is ensured.
In a possible implementation manner, optionally, in step S300, driving the linear infrared light source to perform two-dimensional motion in the welding area, and melting the heated surface of the bipolar plate or the diaphragm to be welded with the flow frame to obtain a flow battery stack assembly, including:
S310, the linear infrared light source reciprocates above the welding area along the X-Y direction of the welding area;
S320, the linear infrared light source passes through the liquid flow frame, irradiates to the welding area, and is melted by heating the bipolar plate or the diaphragm, so that the purpose of welding with the liquid flow frame is achieved.
The linear infrared light source reciprocates above the welding area, so that each point of the welding area can be irradiated by the light source, and particularly, the linear infrared light source penetrates through the semitransparent resin pressing plate and the liquid flow frame to reach the surface of the bipolar plate or the diaphragm. The method has the advantages of centralized energy, capability of avoiding adverse effect on non-connection areas, capability of ensuring the performance of the galvanic pile and higher welding speed.
Example 2
Based on the implementation of embodiment 1, the implementation corresponds to a device for a welding method of a flow battery electric pile assembly, which comprises: a vacuum suction table, a vacuum pump and a two-dimensional motion platform;
The vacuum platform is arranged above the two-dimensional motion platform;
the vacuum platform is connected with the vacuum pump and is suitable for fixing the flow battery pile component in vacuum.
In this embodiment, as shown in fig. 2, the vacuum platform 400 is used to place the flow frame, the bipolar plate and/or the diaphragm to be welded, and the flow frame, the bipolar plate and/or the diaphragm are pumped to a vacuum state by connecting with a vacuum pump, specifically, the specification of the vacuum platform 400 is determined according to the size specification of the flow frame, the bipolar plate or the diaphragm. Meanwhile, the pressure plate is adopted to provide pressure for the flow battery pile component to be welded, the interface of the welding area can be tightly contacted, so that reliable welding is realized, the material of the pressure plate is transparent, and can be resin material such as acrylic, PC and the like, meanwhile, the specification of the pressure plate is determined according to the specification of the flow frame to be welded and the bipolar plate and/or the diaphragm, and the welding area can be tightly pressed due to the fact that the pressure plate has certain dead weight, so that the welding purpose of the flow battery pile component is conveniently realized.
Example 3
Based on the apparatus of embodiment 2, as shown in fig. 3, the present embodiment provides a welding system of a flow battery stack assembly, including:
the apparatus of claim 7 and a light source system 300;
the light source system 300 is adapted to provide energy to the weld area.
In this embodiment, the light source system 300 employs a linear infrared light source and reciprocates over the weld area, ensuring that every point of the weld area is illuminated by the infrared light source, thereby absorbing energy to melt and effect welding.
Example 4
Based on the implementation principle and technical means of embodiment 1, as shown in fig. 3 and fig. 4, this embodiment correspondingly provides a flow battery stack assembly, and the specific preparation method is referred to embodiment 1 and is not described herein in detail.
According to another aspect of the present disclosure, there is also provided a flow cell stack assembly including a flow frame 110 and a membrane electrode assembly 150;
The center of the liquid flow frame 110 is provided with a mounting part 120, the mounting part 120 is of a rectangular hollow structure, a rectangular welding part 130 is arranged in the circumferential direction of the mounting part, and the welding part 130 provides a welding area for the membrane electrode assembly 150 to be heated and melted;
The flow frame 110 is further provided with a flow channel 140, the flow channel 140 is centrosymmetric with respect to the welding part 130, and the flow channel 140 is provided with a plurality of bends;
the membrane electrode assembly is sized to match the mounting portion 120.
As an alternative embodiment of the present application, optionally, the membrane electrode assembly comprises a bipolar plate and/or a separator; the bipolar plates and/or separator are made of the same material as the flow frame.
In this embodiment, the flow frame 110 is integrally in a plate structure, and a mounting portion 120 is provided in the middle for placing a membrane electrode assembly, where the membrane electrode assembly may be a bipolar plate and/or a diaphragm, and a welding portion 130 is further provided in the circumferential direction of the mounting portion 120, and the welding portion 130 is in a rectangular frame structure, so as to achieve the purpose of welding the bipolar plate and/or the diaphragm with the flow frame 110 by being melted by heating. It should be noted that, the flow frame 110 is made of a semitransparent polymer resin material, so that the linear infrared light source can be conveniently transmitted, and the materials of the bipolar plate and/or the diaphragm are the same as those of the flow frame 110, and are all made of dark color materials. Thereby realizing the purpose of absorbing the energy of the infrared light source and melting by heating.
The foregoing description of embodiments of the application has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (7)
1. The welding method of the flow battery pile assembly is characterized by comprising the following steps of:
S100, fixing a liquid flow frame and a bipolar plate or the liquid flow frame and a diaphragm at a designated position of a vacuum suction table;
S200, placing a pressing plate above the liquid flow frame, and tightly pressing the liquid flow frame and the bipolar plate or a welding area of the liquid flow frame and the diaphragm by the dead weight of the pressing plate;
In step S200, a pressing plate is placed above the flow frame, and the flow frame and the bipolar plate, or the welding area of the flow frame and the diaphragm, are tightly pressed by the dead weight of the pressing plate, including:
S210, designing the shape of the pressing plate according to the shape of the flow frame flow channel, the bipolar plate or the diaphragm;
S220, the pressure plate which is designed and processed is directly arranged above the liquid flow frame and the bipolar plate or the liquid flow frame and the diaphragm to provide pressure for the welding area;
wherein the welding area is the area where the flow frame is connected with the bipolar plate or the diaphragm;
s300, driving a linear infrared light source to perform two-dimensional motion above the welding area, and melting the heated surface of the bipolar plate or the diaphragm to be welded with the flow frame to obtain a flow battery electric pile assembly;
the flow battery pile component comprises a flow frame and a membrane electrode component;
The center of the liquid flow frame is provided with a mounting part which is of a rectangular hollow structure, a rectangular welding part is arranged in the circumferential direction of the mounting part, and the welding part provides a welding area for the membrane electrode assembly to be heated and melted;
The liquid flow frame is also provided with a flow channel which is centrosymmetric relative to the welding part and is provided with a plurality of bends;
the size of the membrane electrode assembly is matched with that of the mounting part;
The membrane electrode assembly includes a bipolar plate and/or a separator.
2. The welding method of a flow battery stack assembly according to claim 1, wherein in step S100, the fixing the flow frame and the bipolar plate, or the flow frame and the diaphragm, at a designated position of the vacuum suction table includes:
s110, placing the vacuum suction table on an X-Y two-dimensional motion platform;
and S120, connecting the vacuum suction table with a vacuum pump, starting the vacuum pump, and vacuum fixing the positions of the liquid flow frame and the bipolar plate or the liquid flow frame and the diaphragm through vacuum.
3. The welding method of flow cell stack assemblies according to claim 1, wherein in step S100, the flow frame is made of a translucent polymer resin material suitable for transmission of a linear infrared light source.
4. A method of welding a flow cell stack assembly according to claim 3, wherein in step S100, the bipolar plate or the separator is formed of the same substrate as the flow frame, and the surface is adapted to absorb energy of a linear infrared light source and to be melted by heating.
5. The welding method of a flow cell stack assembly according to claim 1, wherein in step S300, the linear infrared light source is driven to perform two-dimensional motion in the welding area, and the heated surface of the bipolar plate or the diaphragm is melted and welded with the flow frame, so as to obtain the flow cell stack assembly, which includes:
S310, the linear infrared light source reciprocates above the welding area along the X-Y direction of the welding area;
S320, the linear infrared light source passes through the liquid flow frame, irradiates to the welding area, and is melted by heating the bipolar plate or the diaphragm, so that the purpose of welding with the liquid flow frame is achieved.
6. A flow battery cell stack assembly welded based on the welding method of the flow battery cell stack assembly according to any one of claims 1-5, comprising a flow frame and a membrane electrode assembly;
The center of the liquid flow frame is provided with a mounting part which is of a rectangular hollow structure, a rectangular welding part is arranged in the circumferential direction of the mounting part, and the welding part provides a welding area for the membrane electrode assembly to be heated and melted;
The liquid flow frame is also provided with a flow channel which is centrosymmetric relative to the welding part and is provided with a plurality of bends;
the membrane electrode assembly is sized to match the mounting portion.
7. The flow battery stack assembly of claim 6 wherein the membrane electrode assembly comprises bipolar plates and/or separator membranes;
the bipolar plate and/or separator are of the same material as the flow frame.
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| CN202210860507.9A CN115051007B (en) | 2022-07-21 | 2022-07-21 | Welding method, device, system and assembly of flow battery pile assembly |
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| CN102136609A (en) * | 2010-01-21 | 2011-07-27 | 长春汇能科技有限公司 | Laser welding method and device for battery component with bipolar structure |
| CN108336378A (en) * | 2018-02-09 | 2018-07-27 | 乐山创新储能技术研究院有限公司 | A kind of antiseep flow battery and its antiseep outer package method |
| CN210224178U (en) * | 2019-05-28 | 2020-03-31 | 乐山伟力得能源有限公司 | Electrode assembly |
| CN114174046A (en) * | 2019-07-30 | 2022-03-11 | 空中客车运作有限责任公司 | Transmission welding method, transmission welding apparatus, and transmission welding equipment |
| CN214956974U (en) * | 2021-07-14 | 2021-11-30 | 孟琳 | Flow battery galvanic pile liquid flow frame structure |
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| CN115051007A (en) | 2022-09-13 |
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