Flow battery electrode frame with closed flow channel

Abstract

The utility model belongs to the technical field of batteries, and discloses a flow battery electrode frame with a closed flow channel, which comprises a frame body and a cover plate, a plurality of inner leakage detection grooves are formed in the frame body, and positioning holes are formed in four corners of the frame body; a sunken part which is sunken inwards from the surface is formed in the middle of the frame body, and the cover plate covers the sunken part; the sunken part comprises a reaction area, and a liquid inlet area and a liquid outlet area which are arranged on two sides of the reaction area, each of the liquid inlet area and the liquid outlet area comprises a runner hole and a plurality of runners, and the runner hole is communicated with the reaction area through each runner. According to the technical scheme, the electrolyte is effectively prevented from leaking along the surface of the electrode frame, and the leakage risk of the galvanic pile is remarkably reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, in particular to a liquid flow battery electrode frame with a closed flow channel. Background Art

[0002] Liquid flow battery, as a bright new star in the field of electrochemical energy storage, has attracted extensive attention and in-depth research from the global scientific research and industry circles with its unique advantages since it was first proposed by Dr. Thaller in 1974. This new energy storage technology, with its core mechanism of independent circulation of positive and negative electrolytes and efficient electrochemical reactions, not only achieves high-density energy storage, but also shows a wide range of application potential and the remarkable characteristics of long-life cyclic use, injecting strong impetus into the vigorous development of the new energy industry.

[0003] However, in the actual application of flow batteries, electrolyte leakage has become a major bottleneck that restricts their performance and life extension. Electrolyte leakage not only leads to the deterioration of the internal environment of the battery, accelerates the aging and failure of battery materials, but also may cause safety hazards and cause immeasurable damage to the equipment and even the entire system. Therefore, how to effectively prevent electrolyte leakage has become the key to improving the performance and reliability of flow batteries. Utility Model Content

[0004] The utility model aims to provide a liquid flow battery electrode frame with a closed flow channel to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides a closed flow channel flow battery electrode frame, comprising a frame body and a cover plate; the frame body is provided with a plurality of internal leakage detection grooves, and the four corners of the frame body are provided with positioning holes; a concave portion is formed inwardly from the surface in the middle of the frame body, and the cover plate is covered on the concave portion;

[0006] The recessed portion includes a reaction zone and a liquid inlet zone and a liquid outlet zone arranged on both sides of the reaction zone. The liquid inlet zone and the liquid outlet zone both include a flow channel hole and a plurality of flow channels. The flow channel hole is connected to the reaction zone through each of the flow channels.

[0007] Optionally, a diversion area is provided at the connection between the liquid inlet area and the liquid outlet area and the reaction area, and the diversion area includes a plurality of diversion platforms, and each of the diversion platforms is sequentially arranged at the edge of the reaction area at a set interval.

[0008] Optionally, a liquid collection area is provided between the diversion area and the liquid inlet area / the liquid outlet area.

[0009] Optionally, carbon felt is placed in the reaction zone.

[0010] Optionally, the internal leakage detection groove is filled with hygroscopic material.

[0011] Optionally, the cover plate and the recessed portion are connected via a laser welding structure.

[0012] Optionally, the laser welding structure includes welding ribs, and the welding ribs are arranged between the cover plate and the recessed portion.

[0013] Optionally, the laser welding structure further includes a glue overflow groove, which is arranged along the edge of the recessed portion, and the glue overflow groove is arranged to correspond to the welding rib.

[0014] Optionally, the electrode frame is a component in the flow battery used to fix the carbon felt and provide an electrolyte flow path. The material selection is diverse: the electrode frame is made of a variety of polymer materials, such as copolymer PP, HDPE, LLDPE, PVC, PVDF and other polymer materials. The appropriate material can be selected according to specific needs, taking into account durability and cost-effectiveness.

[0015] Optionally, a plurality of protrusions are arranged on the upper surface of the frame, and grooves corresponding to the positions of the protrusions are arranged on the lower surface of the frame, and the protrusions are arranged correspondingly to the grooves.

[0016] The technical effects of the utility model are:

[0017] This embodiment proposes an innovative electrode frame design for the flow battery system. The core of this design is that it greatly improves the safety and reliability of the battery stack through sophisticated craftsmanship and ingenious structural design. Specifically, this design uses laser welding technology to tightly combine the cover plate with the recessed part of the electrode frame, forming an indestructible sealing barrier, which effectively prevents the leakage of electrolyte in complex working environments, thereby significantly reducing the risk of failure of the battery stack caused by electrolyte leakage. This innovation not only ensures the stable operation of the battery system, but also extends the service life of the overall equipment. The utility model has an internal leakage detection function, so that when the battery stack is disassembled for maintenance or inspection, it can be quickly and intuitively determined whether there is electrolyte leakage. This function greatly simplifies the troubleshooting process, so that potential problems can be dealt with in a timely and effective manner, avoiding greater losses caused by failure to detect leakage in time. The utility model has accurate positioning when the electrode frames are stacked and assembled. The positioning holes set at the four corners of the frame ensure the accurate positioning of the electrode frames during stacking and assembly. At the same time, the bumps and grooves set on the upper and lower surfaces of the frame not only improve the efficiency of assembly, but also ensure that each electrode frame can be accurately placed in the designated position, thereby further improving the assembly accuracy and stability of the entire battery stack. In summary, the utility model has shown significant advantages in improving the safety, reliability and assembly efficiency of the liquid flow battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 It is a schematic structural diagram of the electrode frame of the flow battery in the embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of a cover plate in an embodiment of the utility model;

[0022] Explanation of the reference numbers: 1. Liquid inlet; 2. Diverter table; 3. Internal leakage detection slot; 4. Laser welding structure; 5. Bump; 6. Positioning hole; 7. Liquid outlet. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element in the middle; when an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element in the middle at the same time; the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only;

[0026] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] Embodiment 1

[0030] like Figure 1 - Figure 2 As shown, in this embodiment, a closed flow channel liquid flow battery electrode frame is provided, including a frame body and a cover plate; a plurality of internal leakage detection grooves 3 are opened on the frame body, and the internal leakage detection grooves 3 are filled with a hygroscopic porous material, which is used to observe whether there is electrolyte leakage here after disassembling the battery stack, and positioning holes 6 are provided at the four corners of the frame body. When the electrode frames are stacked and assembled, the positioning pins are inserted here for positioning, and a recessed portion is formed inward from the surface in the middle of the frame body, and the cover plate is covered on the recessed portion; the cover plate covers the recessed portion to form a closed flow channel, which is sealed by laser welding to prevent the electrolyte from leaking along the surface of the electrode frame, thereby reducing the risk of battery stack leakage.

[0031] The recessed portion includes a reaction zone and a liquid inlet zone and a liquid outlet zone disposed on both sides of the reaction zone, wherein the liquid inlet zone and the liquid outlet zone both include a flow channel hole and a plurality of flow channels, and the flow channel hole is connected to the reaction zone through each of the flow channels. The liquid inlet 1 and the liquid outlet 7 are disposed diagonally.

[0032] The electrode frame is a component in the flow battery used to fix carbon felt and provide electrolyte flow channels. The material selection is diverse: the electrode frame is made of a variety of polymer materials, such as copolymer PP, HDPE, LLDPE, PVC and PVDF. The appropriate material can be selected according to specific needs, taking into account durability and cost-effectiveness.

[0033] The present embodiment effectively prevents leakage of electrolyte along the surface of the electrode frame by laser welding and sealing between the cover plate and the recessed portion, significantly reducing the risk of leakage of the battery stack. The present embodiment has an internal leakage detection function, which can visually observe whether there is electrolyte leakage after disassembling the battery stack, facilitating timely discovery and handling of potential problems. The present embodiment has precise positioning when the electrode frame is stacked and assembled, and the precise positioning of the electrode frame during stacked assembly is ensured by the positioning holes 6 provided at the four corners of the frame. At the same time, the bumps 5 and grooves provided on the upper and lower surfaces of the frame improve the assembly efficiency and accuracy.

[0034] This embodiment proposes an innovative electrode frame design for the flow battery system. The core of this design is to greatly improve the safety and reliability of the battery stack through sophisticated craftsmanship and ingenious structural design. Specifically, this design uses laser welding technology to tightly combine the cover plate with the recessed part of the electrode frame to form an indestructible sealing barrier, which effectively prevents the leakage of electrolyte in complex working environments, thereby significantly reducing the risk of failure of the battery stack caused by electrolyte leakage. This innovation not only ensures the stable operation of the battery system, but also extends the service life of the overall equipment.

[0035] Furthermore, the present embodiment also incorporates advanced internal leakage detection technology. By providing an internal leakage detection groove 3 on the electrode frame and filling it with a porous material with excellent moisture absorption properties, it is possible to quickly and intuitively determine whether there is electrolyte leakage when the battery stack is disassembled for maintenance or inspection. This function greatly simplifies the troubleshooting process, allowing potential problems to be dealt with in a timely and effective manner, avoiding greater losses caused by failure to detect leakage in time.

[0036] During the stacking and assembly process of the electrode frame, this embodiment also demonstrates excellent performance. By precisely setting the positioning holes 6 at the four corners of the frame, and combining the design of the protrusions 5 and grooves that cooperate with each other on the upper and lower surfaces, the electrode frame is accurately positioned and quickly docked during the assembly process. This design not only improves the efficiency of assembly, but also ensures that each electrode frame can be accurately placed in the designated position, thereby further improving the assembly accuracy and stability of the entire battery stack. In summary, this embodiment has shown significant advantages in improving the safety, reliability and assembly efficiency of the liquid flow battery system.

[0037] It is feasible that a diversion area is provided at the connection between the liquid inlet area and the liquid outlet area and the reaction area, and the diversion area includes a plurality of diversion platforms 2, each of which is arranged in sequence at the edge of the reaction area according to a set interval, and the diversion platform 2 guides the electrolyte to flow evenly into the carbon felt in the reaction area.

[0038] It is feasible that a liquid collecting area is provided between the diversion area and the liquid inlet area / the liquid outlet area, and the electrolyte is collected here before flowing into the reaction area, so as to improve the uniformity of the electrolyte flowing into the reaction area.

[0039] Diversion and liquid collection design: The design of the diversion area and liquid collection area between the liquid inlet area, liquid outlet area and reaction area enables the electrolyte to flow into the reaction area more evenly, thereby improving the efficiency of the electrochemical reaction.

[0040] It is feasible that carbon felt is placed in the reaction zone, and the electrolyte flows through the carbon felt to generate an electrochemical reaction.

[0041] It is feasible that the inner leakage detection groove 3 is filled with a hygroscopic material.

[0042] It is feasible that the cover plate and the recessed portion are connected via a laser welding structure. The laser welding structure comprises a welding rib and a glue overflow groove, wherein the welding rib is arranged between the cover plate and the recessed portion, the glue overflow groove is arranged along the edge of the recessed portion, and the glue overflow groove is arranged correspondingly to the welding rib.

[0043] The laser hits the welding ribs to melt them and overflow into the glue overflow groove to ensure the smooth coverage of the cover plate. The welding ribs are used to strengthen the laser welding strength of the cover plate and the electrode frame.

[0044] Welding reinforcement: The design of the glue overflow groove and welding ribs not only ensures the smooth coverage of the cover plate, but also strengthens the laser welding strength of the cover plate and the electrode frame, and improves the stability of the overall structure.

[0045] It can be implemented that a plurality of protrusions 5 are arranged on the upper surface of the frame, and a groove corresponding to the position of each protrusion 5 is arranged on the lower surface of the frame, and the protrusions 5 are arranged correspondingly to the grooves. This embodiment is easy to assemble and maintain: the corresponding design of the protrusions 5 and the grooves simplifies the assembly process of the electrode frame, and also facilitates subsequent disassembly and maintenance.

[0046] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A closed flow channel liquid flow battery electrode frame, characterized in that: It comprises a frame and a cover plate; the frame is provided with a plurality of internal leakage detection grooves (3), and the four corners of the frame are provided with positioning holes (6); a concave portion which is concave inward from the surface is formed in the middle of the frame, and the cover plate covers the concave portion; The recessed portion includes a reaction zone and a liquid inlet zone and a liquid outlet zone arranged on both sides of the reaction zone. The liquid inlet zone and the liquid outlet zone both include a flow channel hole and a plurality of flow channels. The flow channel hole is connected to the reaction zone through each of the flow channels.

2. The closed-channel flow battery electrode frame according to claim 1, characterized in that: A diversion zone is provided at the connection between the liquid inlet zone and the liquid outlet zone and the reaction zone. The diversion zone comprises a plurality of diversion platforms (2). Each of the diversion platforms (2) is sequentially arranged at the edge of the reaction zone at a set interval.

3. The closed-channel flow battery electrode frame according to claim 2, characterized in that: A liquid collecting area is arranged between the flow dividing area and the liquid inlet area / the liquid outlet area.

4. The closed-channel flow battery electrode frame according to claim 1, characterized in that: Carbon felt is placed in the reaction zone.

5. The closed-channel flow battery electrode frame according to claim 1, characterized in that: The inner leakage detection groove (3) is filled with a hygroscopic material.

6. The closed-channel flow battery electrode frame according to claim 1, characterized in that: The cover plate and the recessed portion are connected via a laser welding structure (4).

7. The closed-channel flow battery electrode frame according to claim 6, characterized in that: The laser welding structure (4) comprises a welding rib, and the welding rib is arranged between the cover plate and the recessed portion.

8. The closed-channel flow battery electrode frame according to claim 7, characterized in that: The laser welding structure (4) further comprises a glue overflow groove, which is arranged along the edge of the recessed portion, and the glue overflow groove is arranged in a corresponding manner to the welding rib.

9. The closed-channel flow battery electrode frame according to claim 1, characterized in that: The frame is made of any one of copolymer PP, HDPE, LLDPE, PVC and PVDF.

10. The closed-channel flow battery electrode frame according to claim 1, characterized in that: A plurality of protrusions (5) are arranged on the upper surface of the frame body, and grooves corresponding to the positions of the protrusions (5) are arranged on the lower surface of the frame body, and the protrusions (5) are arranged correspondingly to the grooves.

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