Flow battery unit

Abstract

The utility model provides a flow battery unit which comprises a plate frame and a bipolar plate arranged on the plate frame, and a runner plate is covered on the bipolar plate; a positioning structure facing the runner plate is arranged in the plate frame, and an adaptive structure matched with the positioning structure is arranged on the runner plate. According to the flow battery unit, the positioning structure facing the flow channel plate is arranged in the plate frame, and the adaptive structure matched with the positioning structure is arranged on the flow channel plate, so that the flow channel plate can be effectively and accurately positioned. According to the design, the problem of dimensional deviation caused by shrinkage of a runner plate material is reduced, so that the assembly precision and efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid flow batteries, in particular to a liquid flow battery unit. Background Art

[0002] The core flaw in existing flow battery cell assembly technology lies in the pre-assembly and bonding of the manifold plate to the bipolar plate. Due to its highly conductive material, the manifold plate shrinks after die-cutting, causing its shape and size to deviate from the designed design, resulting in unstable assembly. Utility Model Content

[0003] The utility model provides a liquid flow battery unit, which solves the problem of low assembly efficiency of liquid flow battery stacks in the prior art due to deviations between the shape and size of flow channel plates and the design.

[0004] The technical solution of the present utility model is achieved as follows:

[0005] A liquid flow battery cell includes a plate frame and a bipolar plate arranged on the plate frame, the bipolar plate is covered with a flow channel plate; the plate frame is provided with a positioning structure facing the flow channel plate, and the flow channel plate is provided with an adapting structure that cooperates with the positioning structure.

[0006] Furthermore, the positioning structure is a protrusion, and the adapting structure is a groove, and the groove is adapted on the protrusion.

[0007] Furthermore, the protrusion is integrally formed with the plate frame.

[0008] Furthermore, it also includes a flow channel cover plate, which covers the liquid flow channels on both sides of the plate frame.

[0009] Furthermore, the flow channel cover plate has a limiting structure on one side close to the flow channel plate, and the limiting structure covers the adapting structure.

[0010] Furthermore, the limiting structure is a strip-shaped piece integrally formed with the flow channel cover plate.

[0011] The beneficial effects of the technical solution provided by this application are:

[0012] This flow battery unit effectively and accurately positions the manifold plate by providing a positioning structure in the plate frame that faces the manifold plate, and an adaptor structure on the manifold plate that mates with the positioning structure. This design reduces dimensional deviations caused by shrinkage of the manifold plate material, thereby improving assembly precision and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 Schematic diagram of a flow battery unit of the present invention;

[0015] Figure 2 This is a schematic diagram of an exploded flow battery unit of the present invention;

[0016] Figure 3 For this utility model Figure 2 The enlarged schematic diagram at A in the middle;

[0017] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged portion B.

[0018] In the figure: 10 liquid flow channel, 11 plate frame, 12 bipolar plate, 13 flow channel plate, 14 flow channel cover plate, 15 positioning structure, 16 adaptation structure, 17 limiting structure. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solution of the present invention in conjunction with the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Reference Figure 1-4 A liquid flow battery cell includes a plate frame 11 and a bipolar plate 12 arranged on the plate frame 11, and the bipolar plate 12 is covered with a flow channel plate 13; the plate frame 11 is provided with a positioning structure 15 facing the flow channel plate 13, and the flow channel plate 13 is provided with an adapting structure 16 that cooperates with the positioning structure 15.

[0021] The plate frame 11 serves as the framework of the flow battery cell, providing basic support for the entire battery cell and ensuring the stability and integrity of the structure. The bipolar plate 12 is mounted on the plate frame 11 and serves as a conductive medium between the electrodes, enabling the transfer of current between the cells while separating the positive and negative electrolytes to prevent them from direct contact. The flow channel plate 13 covers the bipolar plate 12. Its main function is to form a channel for the flow of electrolyte, ensuring that the electrolyte can flow evenly across the surface of the bipolar plate 12 and participate in the electrochemical reaction. The positioning structure 15 is arranged in the plate frame 11, facing the direction of the flow channel plate 13. The function of the positioning structure 15 is to provide an accurate positioning point or guide for the flow channel plate 13, ensuring that the flow channel plate is aligned with the bipolar plate in the correct position. The adapter structure 16 cooperates with the positioning structure 15 in the plate frame 11. The adapter structure 16 ensures that the flow channel plate 13 can be limited to the bipolar plate to prevent displacement or vibration during battery operation.

[0022] First, align the flow plate 13 with the mounting slots (not labeled in the figure) between the relative positioning structures 15 in the plate frame 11. Align the adapting structure 16 of the flow plate 13 with the positioning structure 15, so that the adapting structure 16 on the flow plate 13 mates with the positioning structure 15 in the plate frame 11. This mate can be achieved by insertion, snapping, or other mechanical locking methods, thereby achieving the initial positioning of the flow plate 13. Once the adapting structure 16 and the positioning structure 15 are properly engaged, the flow plate 13 is fixed in the predetermined position above the bipolar plate 12. This positioning method prevents the flow plate from shifting when the electrolyte flows or the battery cell is subjected to external vibration.

[0023] like Figure 3 、 4 The positioning structure 15 is a protrusion, and the adapting structure 16 is a groove, and the groove is adapted on the protrusion.

[0024] The positioning structures 15 disposed within the plate frame 11, facing the flow plate 13, are now specifically in the form of protrusions. These protrusions can be pillars, spikes, or other three-dimensional structures. They extend from the inner surface of the plate frame 11 and are designed to mate with the adapting structures 16 on the flow plate 13. The adapting structures 16 on the flow plate 13 are now specifically in the form of grooves. These grooves are notches or recessed portions in the flow plate 13 designed to receive and adapt to the protrusions 15 in the plate frame 11.

[0025] When assembling the battery stack, the flow plate 13 is placed above the bipolar plate 12 so that the groove 16 on the flow plate is aligned with the protrusion 15 in the plate frame 11. The size and shape of the protrusion 15 and the groove 16 are designed to match precisely, ensuring that the protrusion 15 limits the flow plate 13 in the horizontal direction. This limiting method effectively prevents the flow plate 13 from shifting due to factors such as electrolyte flow during the operation of the battery stack.

[0026] like Figure 2 , further comprising a flow channel cover plate 14, which covers the liquid flow channels 10 on both sides of the plate frame 11. The flow channel cover plate 14 has a limiting structure 17 on one side close to the flow channel plate 13, and the limiting structure 17 covers the adapting structure 16.

[0027] The flow channel cover plate 14 covers the liquid flow channel 10 on both sides of the plate frame 11. The main function of the flow channel cover plate 14 is to prevent leakage of the electrolyte, ensure that the electrolyte flows in the predetermined flow channel, and may help to improve the sealing and integrity of the battery stack. The liquid flow channel 10 is a channel on both sides of the plate frame 11, which is used to guide the electrolyte to flow through the battery cell and participate in the electrochemical reaction. The limiting structure 17 is a specific structure on the flow channel cover plate 14 close to the side of the flow channel plate 13. The function of the limiting structure 17 is to further press the flow channel plate 13 to prevent the flow channel plate from moving in the vertical direction.

[0028] The flow channel cover plate 14 is installed on the plate frame 11, covering and sealing the liquid flow channel 10, ensuring that the electrolyte flows along the predetermined path while preventing electrolyte leakage. The flow channel cover plate 14 has a limiting structure 17 on the side close to the flow channel plate 13. When the flow channel cover plate 14 is in place, the limiting structure 17 on it will cover the flow channel plate 13, thereby applying additional pressure to the flow channel plate 13. Through this design, the addition of the flow channel cover plate 14 and the limiting structure 17 can achieve vertical positioning of the flow channel plate.

[0029] like Figure 2 The limiting structure 17 is a strip-shaped piece integrally formed with the flow channel cover plate 14 .

[0030] The limiting structure 17 is in the shape of a strip, which is a long protrusion that extends along the edge or specific area of ​​the flow channel cover plate 14. The strip design helps to provide effective physical blocking or positioning for the edge of the flow channel plate 13 while maintaining the lightness and compactness of the flow channel cover plate 14.

[0031] The limiting structure 17 is directly involved in the assembly process of the battery cell as part of the flow channel cover plate 14. Since it is integrally formed, there is no gap between the limiting structure 17 and the flow channel cover plate 14, ensuring the sealing and stability of the overall structure.

[0032] It should be noted that, due to the size defect, the existing flow channel plate is usually connected to the bipolar plate 12 on the plate frame 11 in the form of adhesive. However, since the adhesive sealant takes time to cure, the flow channel plate 13 is not limited in the cavity of the plate frame 12, and the flow channel plate has the problem of displacement during the period when the sealant is not completely cured. In addition, after the flow channel plate and the bipolar plate are bonded, the flow channel plate needs to be pressed to flatten the adhesive, otherwise the contact resistance between the flow channel plate and the bipolar plate will be relatively large. In addition, adhesive sealants are generally not acid-resistant. Over time, the sealant will decompose and enter the electrolyte, posing a risk of contaminating the electrolyte and affecting the performance of the system. Therefore, the positioning structure and the adaptation structure used in this application can meet the assembly stability of the flow channel plate. In addition, in order to increase the contact tightness between the bipolar plate and the flow channel plate, the limiting structure 17 on the flow channel cover plate can make up for the deficiency of eliminating the use of adhesive glue; it can also avoid the problem that the adhesive sealant is not acid-resistant, and the sealant will decompose into the electrolyte over time, causing pollution to the electrolyte and thus affecting the system performance.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A liquid flow battery cell, comprising a plate frame (11) and a bipolar plate (12) arranged on the plate frame (11), wherein the bipolar plate (12) is covered with a flow channel plate (13); characterized in that: The plate frame (11) is provided with a positioning structure (15) facing the flow channel plate (13), and the flow channel plate (13) is provided with an adapting structure (16) that matches the positioning structure (15).

2. The flow battery cell according to claim 1, wherein: The positioning structure (15) is a protrusion, and the adapting structure (16) is a groove, and the groove is adapted on the protrusion.

3. The flow battery cell according to claim 2, wherein: The protrusion is integrally formed with the plate frame (11).

4. The flow battery cell according to claim 1, wherein: It also includes a flow channel cover plate (14), which covers the liquid flow channels (10) on both sides of the plate frame (11).

5. The flow battery cell according to claim 4, wherein: The flow channel cover plate (14) has a limiting structure (17) on one side close to the flow channel plate (13), and the limiting structure (17) covers the adapting structure (16).

6. The flow battery cell according to claim 5, wherein: The limiting structure (17) is a strip-shaped piece integrally formed with the flow channel cover plate (14).

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