CN221900050U - Pile positioning structure and flow battery pile suitable for same - Google Patents

Abstract

The application provides a galvanic pile positioning structure and a flow battery galvanic pile applicable to the galvanic pile, which are applicable to the flow battery galvanic pile, wherein the flow battery galvanic pile comprises an ion membrane component, the galvanic pile positioning structure comprises a first pole frame component and a second pole frame component which are respectively positioned at two sides of the ion membrane component, and the first pole frame component and the second pole frame component respectively comprise a first pole frame and a second pole frame which are opposite, wherein one or more through holes are formed at the edge of at least one side of the first pole frame; the second pole frame and the first pole frame are provided with one or more bosses matched with the through holes in number at least at the positions corresponding to the edges of one side; and inserting the boss of the second pole frame in the first pole frame assembly into the through hole of the first pole frame in the second pole frame assembly in the flow battery stack. The pile positioning structure and the flow battery pile applicable to the pile positioning structure can reduce the influence on other parts in the pile during pile assembly, save pile assembly time and improve pile assembly efficiency.

Description

Pile positioning structure and flow battery pile suitable for same

Technical Field

The application mainly relates to the field of flow batteries, in particular to a pile positioning structure and a flow battery pile suitable for the pile positioning structure.

Background

The redox flow battery has the advantages of high safety, long service life, independent expansion of power and capacity and the like, is a very potential energy storage technology, is used for storing and releasing electric energy, can promote wider application of renewable energy sources, balances supply and demand of an electric power system, and improves reliability of a power grid. The electric pile is a core component of the all-vanadium redox flow battery system, and besides improvement of electric pile performance, optimization of an electric pile assembly process is also important.

At present, the galvanic pile is assembled in a layer-by-layer stacking mode, the positioning rod is adopted for positioning in the assembly process, the positioning rod is very tedious to disassemble when the assembly is completed due to the existence of accumulated tolerance of each part, and the process of disassembling the positioning rod can lead to cracking or deformation of galvanic pile parts (particularly bipolar plates). The greater the number of galvanic pile segments, the greater the tolerance stack-up of such conventional positioning means, the more difficult the removal of the positioning rod and the greater the risk of cracking or deformation of the galvanic pile components.

Disclosure of utility model

The application aims to solve the technical problem of providing a pile positioning structure and a flow battery pile suitable for the pile positioning structure, which can reduce the influence on other parts in the pile during pile assembly, save pile assembly time and improve pile assembly efficiency.

In order to solve the technical problems, the application provides a cell stack positioning structure, which is applicable to a flow battery cell stack, wherein the flow battery cell stack comprises an ion membrane assembly, and the cell stack positioning structure comprises: the first pole frame component and the second pole frame component are respectively positioned at two sides of the ion membrane component, and each of the first pole frame component and the second pole frame component comprises a first pole frame and a second pole frame which are opposite, wherein one or more through holes are formed in the edge of at least one side of the first pole frame; the position of the second polar frame corresponding to the at least one side edge of the first polar frame comprises one or more bosses matched with the through holes in number; and inserting the boss of the second pole frame in the first pole frame component into the through hole of the first pole frame in the second pole frame component in the flow battery stack.

Optionally, the stack positioning structure further comprises one or more first openings located at the edge position of the ionic membrane assembly, and the number and the positions of the first openings in the flow battery stack correspond to the through holes.

Optionally, the flow battery stack further includes a bipolar plate located in the first and second electrode frame assemblies, where the first and second electrode frames are located on two sides of the bipolar plate in the first and second electrode frame assemblies, respectively.

Optionally, the flow battery stack further includes two hot melt films respectively located in the first pole frame component and the second pole frame component, and the first pole frame component and the second pole frame component are respectively located at two sides of the bipolar plate, wherein the first pole frame and the second pole frame are respectively located at the outer sides of the two hot melt films in an adjacent mode.

Optionally, the stack positioning structure further includes main positioning holes in the first electrode frame, the second electrode frame and the bipolar plate, and the number of the main positioning holes in the first electrode frame, the second electrode frame and the bipolar plate corresponds to the positions in the flow battery stack.

Optionally, the diameter of the one or more through holes is greater than or equal to 3mm.

Optionally, the diameter of the boss is 0.5 mm-1 mm smaller than the diameter of the through hole.

Optionally, the boss is provided with a chamfer, and the radius of the chamfer ranges from 0.2mm to 1mm.

Optionally, the flow battery stack further includes two face seals located at two sides of the ion membrane assembly, wherein the height of the boss is greater than the sum of the thickness of the ion membrane assembly and the compressed thickness of the two face seals, and is less than the sum of the thickness of the ion membrane assembly, the compressed thickness of the two face seals, and the thickness of the first electrode frame.

In order to solve the technical problems, the present application provides a flow battery stack, including: an ion membrane module and a stack positioning structure as described above.

Compared with the prior art, the positioning rod is not required to be used for positioning the electric pile assembly in the electric pile assembly process, so that a complicated positioning rod dismantling process is not required, the influence on other parts in the electric pile during the electric pile assembly can be reduced, the electric pile assembly time is saved, and the electric pile assembly efficiency is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the accompanying drawings:

FIG. 1 is a schematic view of a flow battery stack assembly according to an embodiment of the present application;

FIG. 2 is an exploded view of a first pole frame assembly and a second pole frame assembly in a stack positioning structure according to an embodiment of the present application;

FIG. 3 is a front view of a first pole frame in a stack positioning structure according to an embodiment of the present application;

FIG. 4 is an enlarged view of a portion of a first pole frame of a stack positioning structure according to an embodiment of the present application;

FIG. 5 is a front view of a second pole frame in a stack positioning structure according to an embodiment of the present application;

fig. 6 to 7 are partial enlarged views of a second frame in a stack positioning structure according to an embodiment of the present application.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are used in the description of the embodiments will be briefly described below. It is apparent that the drawings in the following description are only some examples or embodiments of the present application, and it is apparent to those of ordinary skill in the art that the present application may be applied to other similar situations according to the drawings without inventive effort. Unless otherwise apparent from the context of the language or otherwise specified, like reference numerals in the figures refer to like structures or operations.

As used in the specification and in the claims, the terms "a," "an," "the," and/or "the" are not specific to a singular, but may include a plurality, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application. Furthermore, although terms used in the present application are selected from publicly known and commonly used terms, some terms mentioned in the present specification may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Furthermore, it is required that the present application is understood, not simply by the actual terms used but by the meaning of each term lying within.

The present application provides a flow battery stack 10 and a stack positioning structure 20 applied thereto, referring to fig. 1 to 7. Referring first to fig. 1 and 2, a flow cell stack 10 generally includes an ion membrane assembly 101 and a stack positioning structure 20 adapted for use with flow cell stack 10. The stack positioning structure 20 includes a first electrode frame assembly 201 and a second electrode frame assembly 202, which are respectively located on two sides of the ion membrane assembly 101 with reference to fig. 1. In the present embodiment, according to fig. 2, the first pole frame assembly 201 includes a first pole frame 2011 and a second pole frame 2012, and the second pole frame assembly 202 includes a first pole frame 2021 and a second pole frame 2022. It should be noted that, since the first pole frame assembly 201 and the second pole frame assembly 202 have the same internal configuration, they are both illustrated in fig. 2; and because the first and second pole frame assemblies 201, 202 are differently positioned in the flow cell stack 10, different numbers are used in fig. 2 for the same components therein.

For a better understanding of the construction of the stack positioning structure 20, the internal structural details of the first pole frame 2011 and the second pole frame 2012 of the first pole frame assembly 201 in the stack positioning structure 20 will now be described in detail with reference to fig. 3 to 7, in which, since the structural construction of the first pole frame assembly 201 and the second pole frame assembly 202 is the same, different reference numerals in the same figures will be used for illustration. Fig. 3 is a front view of the first pole frame 2011 and the first pole frame 2021, and has a region a in fig. 3; fig. 4 is a partially enlarged schematic view of the first pole frame 2011 and the first pole frame 2021 at the region a; fig. 5 is a front view of the second frame 2012 and the second frame 2022, with a region b in fig. 5; fig. 6 to 7 are partial enlarged schematic views of the second frame 2012 and the second frame 2022 at the region b, wherein fig. 6 is a top view and fig. 7 is a front view.

Referring to fig. 3 to 4, in the present embodiment, taking the first pole frame 2011 of the first pole frame assembly 201 as an example, the first pole frame 2011 has two sets of main positioning holes 2013 and two through holes 2014 formed on the side edges. In other embodiments of the present application, the number of the through holes 2014 on the first electrode frame 2011 may be one or more than 2, and the present application is not limited to the embodiments shown in fig. 3 to 4. In addition, in this embodiment, taking the first pole frame 2011 as an example, a main positioning hole 2013 is further formed on the side edge of the first pole frame 2011 on the basis of two through holes 2014, but the main positioning hole 2013 may be omitted in other embodiments of the present application; in the present embodiment, the main positioning hole 2013 can make the fixing manner of the first pole frame assembly 201 itself by hot pressing and integrating easier, and has a preferable effect. The structure of the first pole frame 2021 in the second pole frame assembly 202 is the same as that of the first pole frame 2011, and also has a through hole 2024 and a main positioning hole 2023, and other details can be understood with reference to fig. 3 to 4 and this description, and will not be repeated here.

Referring illustratively to fig. 2, the flow cell stack 10 further includes two hot melt films 1061 and 1062 in the first and second pole frame assemblies 201 and 202, respectively. Taking the first pole frame assembly 201 as an example, the hot melt films 1061 are respectively located at two sides of the bipolar plate 1051 in the first pole frame assembly 201, where the first pole frame 2011 and the second pole frame 2012 are respectively located at the outer sides of the two hot melt films 1061 in an adjacent manner. The two hot melt films 1061 are tightly attached to the bipolar plate 1051, and after the first pole frame 2011 and the second pole frame 2012 are assembled, the first pole frame assembly 201 can be integrally fixed by hot pressing. In this process, the main positioning hole 2013 can perform better fixing and positioning functions. The structural features of the hot melt film 1062 in the second frame component 202 are identical to those of the hot melt film 1061 and the hot pressing integrated process described above, and are not repeated here.

On the other hand, referring to fig. 2, the flow battery stack 10 further includes bipolar plates 1051 and 1052 in the first and second pole frame assemblies 201 and 202. Taking the first pole frame assembly 201 as an example, the first pole frame 2011 and the second pole frame 2012 are respectively located at two sides of the bipolar plate 1051 in the first pole frame assembly 201. The structural features of the bipolar plate 1052 in the second frame assembly 202 are identical to those of the bipolar plate 1051 and will not be described in detail herein. Similarly, in the present embodiment, the stack positioning structure 20 further includes main positioning holes 1053 in the bipolar plate 1051, and the number of main positioning holes 2013 of the first electrode frame 2011, the main positioning holes 2016 of the second electrode frame 2012, and the main positioning holes 1053 in the bipolar plate 1051 correspond to the positions in the flow cell stack 10. As described above, in the hot press integration process, the main positioning hole 2013 of the first pole frame 2011, the main positioning hole 2016 of the second pole frame 2012, and the main positioning hole 1053 of the bipolar plate 1051 cooperate with each other so as to perform a fixing positioning function in the process.

Further, referring to fig. 5 to 7, taking the second pole frame 2012 of the first pole frame assembly 201 as an example, the positions of the second pole frame 2012 corresponding to the two side edges of the first pole frame 2011 include two bosses 2015 matching the number of the through holes 2014. In an embodiment of the present application, the number and positions of the bosses 2015 correspond to and match the through holes 2014. The structure of the second frame 2022 in the second frame assembly 202 is the same as that of the second frame 2012, which can be understood in comparison. Referring back to fig. 1 and 2, the boss 2015 maintains the protruding direction in the same direction (e.g., downward) in the first and second electrode frame assemblies 201 and 202 in the flow battery stack 10, so that after assembly, the boss 2015 of the second electrode frame 2012 in the first electrode frame assembly 201 can be inserted into the through hole 2024 of the first electrode frame 2021 in the second electrode frame assembly 202, thereby achieving the function of positioning the first and second electrode frame assemblies 201 and 202 with respect to each other. Similarly, referring to fig. 5 or 7, the second frame 2012 also has a main locating hole 2016 in addition to the boss 2015. The structure of the second frame 2022 in the second frame assembly 202 is the same as that of the second frame 2012, and it will be understood with reference to fig. 5 to 7 and the description of this section that the second frame 2022 also has the same boss 2025 and main positioning hole 2026, and other features will not be described herein.

In this embodiment, the thickness of the first pole frame 2011 (2021) is preferably 4mm, the thickness of the second pole frame 2012 (2022) is preferably 4mm, the diameter of the through hole 2024 is greater than or equal to 3mm, and the diameter of the boss 2015 (2025) is 0.5mm to 1mm smaller than the diameter of the through hole 2024 (2014). Further preferably, the boss 2015 (2025) has a chamfer with a radius in the range of 0.2mm to 1mm.

With continued reference to fig. 1, in the present embodiment, the stack positioning structure 20 further includes a plurality of first openings 1011 located at the edge positions of the ion membrane modules 101, and the number of the first openings 1011 and the positions in the flow battery stack 10 correspond to the through holes 2014 and the through holes 2024, so that the boss 2015 of the second pole frame 2012 in the first pole frame assembly 201 can be inserted into the through hole 2024 of the first pole frame 2021 in the second pole frame assembly 202 through the first opening 1011 of the ion membrane module 101, thereby better fixing the ion membrane modules 101 therein while positioning between the first pole frame assembly 201 and the second pole frame assembly 202. For example, if the ion membrane module 101 includes an ion membrane and a surrounding frame, the first opening 1011 may be formed at a position of the frame.

As shown in fig. 1, the flow cell stack 10 further includes two face seals 102, one on each side of the ion membrane module 101. Preferably, the height of the boss 2015 is greater than the sum of the thickness of the ion membrane module 101 and the compressed thickness of the two face seals 102 and less than the sum of the thickness of the ion membrane module 101, the compressed thickness of the two face seals 102 and the thickness of the first pole frame 2021, so that the boss 2015 can be inserted into the through hole 2024 to a proper position without penetrating the through hole 2024. Illustratively, the thickness of the individual face seal 102 is preferably 0.5mm, the thickness of the face seal 102 after compression is 0.4mm, and the thickness of the ion membrane module 101 is preferably 1mm.

The flow battery stack 10 is assembled by simultaneously attaching two face seals 102 to two sides of the ion membrane module 101, and positioning and assembling the face seals 102 and the first and second electrode frame assemblies 201 and 202 from two sides respectively, wherein the face seals 102 and the first and second electrode frame assemblies 201 and 202 can be positioned through a common runner 107 (refer to fig. 3 and 5) inside the flow battery stack 10. In this process, the boss 2015 passes through the first opening 1011 on the ion membrane module 101 and then passes through the through hole 2024 in the first pole frame 2021 in the second pole frame module 202, so that the assembly of the flow battery stack 10 is completed in the accurate positioning process, and the positioning component is not required to be disassembled after the assembly, so that the influence on the components in the stack can be effectively reduced, and the assembly efficiency is improved.

While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing application disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements and adaptations of the application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within the present disclosure, and therefore, such modifications, improvements, and adaptations are intended to be within the spirit and scope of the exemplary embodiments of the present disclosure.

Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be combined as suitable.

Similarly, it should be appreciated that in order to simplify the present disclosure and thereby facilitate an understanding of one or more embodiments of the application, various features are sometimes grouped together in a single embodiment, figure, or description thereof. This method of disclosure does not imply that the subject application requires more features than are set forth in the claims. Indeed, less than all of the features of a single embodiment disclosed above.

In some embodiments, numbers describing the components, number of attributes are used, it being understood that such numbers being used in the description of embodiments are modified in some examples by the modifier "about," approximately, "or" substantially. Unless otherwise indicated, "about," "approximately," or "substantially" indicate that the number allows for a 20% variation. Accordingly, in some embodiments, numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and employ a method for preserving the general number of digits. Although the numerical ranges and parameters set forth herein are approximations in some embodiments for use in determining the breadth of the range, in particular embodiments, the numerical values set forth herein are as precisely as possible.

While the application has been described with reference to the specific embodiments presently, it will be appreciated by those skilled in the art that the foregoing embodiments are merely illustrative of the application, and various equivalent changes and substitutions may be made without departing from the spirit of the application, and therefore, all changes and modifications to the embodiments are intended to be within the scope of the appended claims.

Claims (10)

1. A cell stack positioning structure suitable for use in a flow cell stack comprising an ion membrane assembly, the cell stack positioning structure comprising: the first electrode frame component and the second electrode frame component are respectively positioned at two sides of the ion membrane component, the first electrode frame component and the second electrode frame component respectively comprise a first electrode frame and a second electrode frame which are opposite, wherein,

One or more through holes are formed in the edge of at least one side of the first pole frame;

The position of the second polar frame corresponding to the at least one side edge of the first polar frame comprises one or more bosses matched with the through holes in number; and

In the flow battery stack, the boss of the second pole frame in the first pole frame assembly is inserted into the through hole of the first pole frame in the second pole frame assembly.

2. The stack positioning structure of claim 1, further comprising one or more first openings at an edge location of the ion membrane module, the number and location of the first openings in the flow cell stack corresponding to the through-holes.

3. The stack positioning structure of claim 1, wherein the flow cell stack further comprises bipolar plates positioned in the first and second electrode frame assemblies, respectively, the first and second electrode frames being positioned on either side of the bipolar plates in the first and second electrode frame assemblies, respectively.

4. The stack positioning structure of claim 3, wherein the flow cell stack further comprises two hot melt films respectively positioned in the first and second electrode frame assemblies, respectively positioned on either side of the bipolar plate in the first and second electrode frame assemblies, wherein the first and second electrode frames are respectively positioned immediately outboard of the two hot melt films.

5. The stack positioning structure of claim 4, further comprising primary positioning holes in the first pole frame, the second pole frame, and the bipolar plate, the number of primary positioning holes in the first pole frame, the second pole frame, and the bipolar plate corresponding to locations in the flow cell stack.

6. The stack positioning structure of claim 1, wherein the diameter of the one or more through holes is greater than or equal to 3mm.

7. The stack positioning structure according to claim 1, wherein the diameter of the boss is 0.5mm to 1mm smaller than the diameter of the through hole.

8. The stack positioning structure according to claim 1, wherein the boss has a chamfer, and the chamfer has a radius ranging from 0.2mm to 1mm.

9. The stack positioning structure of claim 1, wherein the flow cell stack further comprises two face seals positioned on either side of the ion membrane assembly, respectively, wherein the height of the boss is greater than the sum of the thickness of the ion membrane assembly and the compressed thickness of the two face seals and less than the sum of the thickness of the ion membrane assembly, the compressed thickness of the two face seals and the thickness of the first pole frame.

10. A flow battery stack, comprising: an ion membrane module and a galvanic pile positioning structure according to any one of claims 1 to 9.