A seal structure for a multi-cell battery internal flow plate frame-membrane assembly

Abstract

The utility model is suitable for sealed structure technical field provides a kind of sealed structure of multi-section battery internal liquid flow board frame-membrane component, comprising: liquid flow board frame;First hot melt connection component is assembled in the rear side of liquid flow board frame;Above-mentioned device first liquid flow board frame as basic support, ensure the structural stability of entire component.Hot melt adhesive paper in first hot melt connection component is adhered on liquid flow board frame, the mechanical strength and heat resistance of nanometer silicon dioxide layer in its one side are strengthened, preliminary barrier liquid penetration.In succession, the ion membrane body of ion membrane component is fixed in nanometer silicon dioxide layer rear side, and rubber connecting frame provides additional support and protection for ion membrane body, ensure the stability and security of ion membrane in electrochemical reaction.Sealing double-sided adhesive component sealing double-sided adhesive body is pasted in rubber connecting frame rear side, and the mechanical performance of enhanced fiber rod on it improves the sealing double-sided adhesive, further enhances sealing effect.

Description

Technical Field

[0001] This utility model belongs to the field of sealing structure technology, and particularly relates to a sealing structure of a liquid flow plate frame-membrane assembly for a multi-cell battery. Background Technology

[0002] Flow batteries are an electrochemical energy storage technology. Simply put, a flow battery consists of a stack unit, electrolyte, electrolyte storage and supply unit, and management and control unit. Flow batteries are high-performance batteries that utilize separate positive and negative electrolytes, allowing each to circulate independently. They are characterized by high capacity, wide applicability (in various environments), and long cycle life. Flow batteries achieve the interconversion of electrical and chemical energy through reversible redox reactions (i.e., reversible changes in valence states) between the active materials in the positive and negative electrode electrolyte solutions. During charging, oxidation occurs at the positive electrode, increasing the valence state of the active materials, while reduction occurs at the negative electrode, decreasing the valence state. The discharge process is the reverse. Unlike conventional solid-state batteries, the positive and / or negative electrode electrolyte solutions in flow batteries are stored in external tanks and transported to the battery interior via pumps and pipelines for the reaction.

[0003] However, in current flow batteries using hot-melt adhesive paper technology, the sealing structure of the internal flow plate-membrane module is mostly sealed solely with hot-melt adhesive paper. This method suffers from a single sealing method, and the ion-exchange membrane is prone to sealing failure during long-term operation of the stack, leading to the risk of external and internal leakage. External leakage can cause environmental pollution, stack performance degradation, and system failure, while internal leakage can result in reduced coulombic efficiency, capacity decay, and cross-contamination of the positive and negative electrolytes, severely affecting the stability of stack operation. Utility Model Content

[0004] This invention provides a sealing structure for a multi-cell battery internal flow plate frame-membrane assembly, aiming to solve the problem that currently used hot melt adhesive paper seals are prone to failure, causing leakage to the external and internal parts of the battery stack, affecting performance and stability.

[0005] This invention is implemented as follows: a sealing structure for a flow plate-membrane assembly inside a multi-cell battery, comprising: a flow plate; a first heat-fusion connection assembly mounted on the rear side of the flow plate, the first heat-fusion connection assembly being used to adhere to the flow plate for initial blocking of liquid permeation; an ion membrane assembly mounted on the rear side of the first heat-fusion connection assembly, the ion membrane assembly being used to allow specific ions to pass through to achieve an electrochemical reaction; a sealing double-sided adhesive assembly mounted on the rear side of the ion membrane assembly, the sealing double-sided adhesive assembly being used to further seal the entire assembly; and a second heat-fusion connection assembly mounted on the rear side of the sealing double-sided adhesive assembly, the second heat-fusion connection assembly being used to protect the sealing double-sided adhesive assembly.

[0006] Preferably, the first hot melt connection assembly includes: hot melt adhesive paper fixedly installed on the rear side of the fluid flow plate frame, and a nano-silica layer is fixedly installed on one side of the hot melt adhesive paper.

[0007] Preferably, the ion exchange membrane assembly includes: an ion exchange membrane body fixedly installed on the rear side of the nano-silica layer, and a rubber connecting frame fixedly installed on the rear side of the ion exchange membrane body.

[0008] Preferably, the sealing double-sided adhesive assembly includes: a sealing double-sided adhesive body fixedly installed on the rear side of the rubber connecting frame, and a reinforcing fiber rod fixedly installed on the sealing double-sided adhesive body.

[0009] Preferably, multiple sets of reinforcing fiber rods are provided, and the multiple sets of reinforcing fiber rods are equidistantly arranged on the sealing double-sided adhesive body.

[0010] Preferably, the structure of the first thermofusion connection assembly is the same as that of the second thermofusion connection assembly.

[0011] Preferably, the fluid flow plate frame, the first hot melt connection assembly, the ion membrane assembly, the sealing double-sided adhesive assembly, and the second hot melt connection assembly are bonded together using existing adhesives.

[0012] Preferably, the first and second hot-melt connection components have holes for filling with adhesive to achieve bonding.

[0013] Compared with related technologies, the sealing structure of the internal fluid flow plate-membrane assembly of a multi-cell battery provided by this utility model has the following advantages: When using the sealing structure of this multi-cell internal flow plate-membrane module, the flow plate frame first serves as the basic support, ensuring the structural stability of the entire module. In the first hot-melt connection assembly, hot-melt adhesive paper adheres to the flow plate frame; a nano-silica layer on one side enhances the mechanical strength and heat resistance of the adhesive paper, initially blocking liquid permeation. Next, the ion-exchange membrane body of the ion-exchange membrane assembly is fixed behind the nano-silica layer, while the rubber connecting frame provides additional support and protection for the ion-exchange membrane body, ensuring the stability and safety of the ion-exchange membrane during electrochemical reactions. The sealing double-sided adhesive body of the sealing double-sided adhesive assembly is pasted behind the rubber connecting frame; reinforcing fiber rods on it improve the mechanical properties of the sealing double-sided adhesive, further enhancing the sealing effect. Finally, the second hot-melt connection assembly covers the rear of the sealing double-sided adhesive assembly, with the same structure as the first hot-melt connection assembly, serving to protect the sealing double-sided adhesive assembly. The entire assembly is bonded together with an adhesive. The holes on the first and second hot-melt connection assemblies are used to fill the adhesive, ensuring the strength of the bond. This multi-layer composite sealing structure effectively improves the sealing performance and mechanical stability by adding materials such as nano-silica layers and reinforcing fiber rods. It solves the problem of easy failure of traditional adhesive tape seals to a certain extent, reduces the risk of external and internal leakage of the fuel cell stack, and thus improves the operational stability and performance of the fuel cell stack. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the first hot-melt connection component of this utility model; Figure 3 This is a schematic diagram of the ion exchange membrane module of this utility model; Figure 4 This is a schematic diagram of the sealing double-sided adhesive assembly of this utility model.

[0015] In the figure: 1. Fluid flow plate frame; 2. First hot melt connection assembly; 3. Ion exchange membrane assembly; 4. Sealing double-sided adhesive assembly; 5. Second hot melt connection assembly; 201. Hot melt adhesive paper; 202. Nano silica layer; 301. Ion exchange membrane body; 302. Rubber connection frame; 401. Sealing double-sided adhesive body; 402. Reinforcing fiber rod. Detailed Implementation

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0017] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Example 1

[0018] A preferred embodiment of the sealing structure of the internal flow plate frame-membrane assembly of a multi-cell battery provided by this utility model is, for example... Figures 1 to 4 The diagram shows a sealing structure for a flow plate-membrane assembly inside a multi-cell battery, comprising: a flow plate frame 1; a first heat-fusion connection assembly 2 mounted on the rear side of the flow plate frame 1, the first heat-fusion connection assembly 2 being used to adhere to the flow plate frame 1 to initially block liquid permeation; an ion exchange membrane assembly 3 mounted on the rear side of the first heat-fusion connection assembly 2, the ion exchange membrane assembly 3 being used to allow specific ions to pass through to achieve an electrochemical reaction; a sealing double-sided adhesive assembly 4 mounted on the rear side of the ion exchange membrane assembly 3, the sealing double-sided adhesive assembly 4 being used to further seal the entire assembly; and a second heat-fusion connection assembly 5 mounted on the rear side of the sealing double-sided adhesive assembly 4, the second heat-fusion connection assembly 5 being used to protect the sealing double-sided adhesive assembly 4.

[0019] In this embodiment, the first hot melt connection component 2 includes: a hot melt adhesive paper 201 fixedly installed on the rear side of the liquid flow plate frame 1, and a nano-silica layer 202 fixedly installed on one side of the hot melt adhesive paper 201.

[0020] In this embodiment, the ion membrane assembly 3 includes: an ion membrane body 301 fixedly installed on the rear side of the nano-silica layer 202, and a rubber connecting frame 302 fixedly installed on the rear side of the ion membrane body 301. Example 2

[0021] Based on Embodiment 1, a preferred embodiment of the sealing structure of the internal flow plate-membrane assembly of a multi-cell battery provided by this utility model is, for example... Figures 1 to 4As shown: The sealing double-sided adhesive assembly 4 includes: a sealing double-sided adhesive body 401 fixedly installed on the rear side of the rubber connecting frame 302, and a reinforcing fiber rod 402 fixedly installed on the sealing double-sided adhesive body 401.

[0022] In this embodiment, multiple sets of reinforcing fiber rods 402 are provided, and the multiple sets of reinforcing fiber rods 402 are equidistantly arranged on the sealing double-sided adhesive body 401.

[0023] In this embodiment, the structure of the first hot-melt connection component 2 is the same as that of the second hot-melt connection component 5.

[0024] In this embodiment, the fluid flow plate frame 1, the first hot melt connection assembly 2, the ion membrane assembly 3, the sealing double-sided adhesive assembly 4, and the second hot melt connection assembly 5 are bonded together using existing adhesives.

[0025] In this embodiment, the first hot-melt connection component 2 and the second hot-melt connection component 5 are provided with holes, which are used to fill adhesive for bonding.

[0026] When using the sealing structure of the internal flow plate-membrane assembly of this multi-cell battery, the flow plate frame 1 first serves as the basic support, ensuring the structural stability of the entire assembly. The hot melt adhesive paper 201 in the first hot melt connection assembly 2 adheres to the flow plate frame 1, and the nano-silica layer 202 on one side enhances the mechanical strength and heat resistance of the adhesive paper, initially blocking liquid permeation. Next, the ion membrane body 301 of the ion membrane assembly 3 is fixed to the rear side of the nano-silica layer 202, and the rubber connecting frame 302 provides additional support and protection for the ion membrane body 301, ensuring the stability and safety of the ion membrane during electrochemical reactions. The sealing double-sided adhesive body 401 of the sealing double-sided adhesive assembly 4 is pasted to the rear side of the rubber connecting frame 302, and the reinforcing fiber rods 402 on it improve the mechanical properties of the sealing double-sided adhesive, further enhancing the sealing effect. Finally, the second hot melt connection assembly 5 covers the rear side of the sealing double-sided adhesive assembly 4, with the same structure as the first hot melt connection assembly 2, serving to protect the sealing double-sided adhesive assembly 4. The entire assembly is bonded together with an adhesive. The holes on the first hot-melt connection assembly 2 and the second hot-melt connection assembly 5 are used to fill the adhesive, ensuring the strength of the bond. This multi-layer composite sealing structure effectively improves the sealing performance and mechanical stability by adding materials such as nano-silica layer 202 and reinforcing fiber rod 402. It solves the problem of easy failure of traditional adhesive tape seals to a certain extent, reduces the risk of external and internal leakage of the fuel cell stack, and thus improves the operational stability and performance of the fuel cell stack.

[0027] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0028] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0029] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A sealing structure for a multi-cell battery internal fluid flow plate-membrane assembly, characterized in that, include: Fluid flow plate frame (1); A first heat-fusion connection assembly (2) is assembled on the rear side of the liquid flow plate frame (1). The first heat-fusion connection assembly (2) is used to adhere to the liquid flow plate frame (1) to initially block liquid penetration. An ion exchange membrane assembly (3) is assembled on the rear side of the first hot-melt connection assembly (2), the ion exchange membrane assembly (3) being used to allow specific ions to pass through to achieve an electrochemical reaction; A sealing double-sided adhesive assembly (4) is mounted on the rear side of the ion membrane assembly (3), the sealing double-sided adhesive assembly (4) is used to further seal the whole; A second heat-melt connection assembly (5) is assembled on the rear side of the sealing double-sided adhesive assembly (4), the second heat-melt connection assembly (5) is used to protect the sealing double-sided adhesive assembly (4).

2. The sealing structure of the internal fluid flow plate-membrane assembly of a multi-cell battery as described in claim 1, characterized in that, The first thermofusion welding assembly (2) includes: Hot melt adhesive paper (201) is fixedly installed on the rear side of the liquid flow plate frame (1), and a nano-silica layer (202) is fixedly installed on one side of the hot melt adhesive paper (201).

3. The sealing structure of the internal fluid flow plate-membrane assembly of a multi-cell battery as described in claim 2, characterized in that, The ion membrane assembly (3) includes: An ion membrane body (301) is fixedly installed on the rear side of the nano-silica layer (202), and a rubber connecting frame (302) is fixedly installed on the rear side of the ion membrane body (301).

4. The sealing structure of the internal fluid flow plate-membrane assembly of a multi-cell battery as described in claim 3, characterized in that, The sealing double-sided adhesive assembly (4) includes: A sealing double-sided adhesive body (401) is fixedly installed on the rear side of the rubber connecting frame (302), and a reinforcing fiber rod (402) is fixedly installed on the sealing double-sided adhesive body (401).

5. The sealing structure of the internal fluid flow plate-membrane assembly of a multi-cell battery as described in claim 4, characterized in that, Multiple sets of the reinforcing fiber rods (402) are provided, and the multiple sets of the reinforcing fiber rods (402) are equidistantly arranged on the sealing double-sided adhesive body (401).

6. The sealing structure of the internal fluid flow plate-membrane assembly of a multi-cell battery as described in claim 1, characterized in that, The structure of the first hot melt connection component (2) is the same as that of the second hot melt connection component (5).

7. The sealing structure of the internal fluid flow plate-membrane assembly of a multi-cell battery as described in claim 1, characterized in that, The fluid flow plate frame (1), the first hot melt connection assembly (2), the ion membrane assembly (3), the sealing double-sided adhesive assembly (4), and the second hot melt connection assembly (5) are bonded together using existing adhesives.

8. The sealing structure of the internal fluid flow plate-membrane assembly of a multi-cell battery as described in claim 1, characterized in that, The first hot melt connection component (2) and the second hot melt connection component (5) have holes, which are used to fill adhesive for bonding.

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