Embedded runner of flow battery

Abstract

The utility model relates to the technical field of flow batteries, in particular to an embedded runner of a flow battery, which comprises a carbon felt and a flow frame, the carbon felt is embedded on the flow frame, a plurality of insulating walls are embedded on the carbon felt at intervals, and the insulating walls are arranged on the carbon felt in a staggered manner to form a zigzag electrolyte runner. According to the utility model, the electrolyte flow channel is formed by utilizing the insulating wall, so that the electrolyte is forced to circulate according to the direction of the flow channel, the electrolyte is more uniformly distributed on the electrode, the unit current density of the electrode is increased, the concentration range is reduced, and the service life of the battery is prolonged.

Description

Technical Field

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

[0002] Flow batteries, a battery system that converts electrical energy into chemical energy through redox reactions in active materials, are a popular new energy product, characterized by high capacity, wide application range, and long cycle life. They hold broad market potential in wind and solar power generation, smart grid development, electric vehicle charging stations, and power supply to remote areas.

[0003] The structure of a flow battery system is complex, and the stack is the core component of the battery system. An important component of the stack is carbon felt. As the area where the electrolyte reacts, it is very important to evenly distribute the electrolyte to the electrode reaction area. Traditional carbon felt assembly involves stacking the entire carbon felt with the diaphragm and graphite electrode plate in sequence, and applying pressure to the entire assembly. However, the compression process may cause excessive compression of the carbon felt, resulting in uneven distribution of the electrode liquid inside the battery stack and reduced flow rate, greatly reducing the unit current density of the electrode, causing varying degrees of concentration polarization, resulting in excessively high local temperatures in the stack, and even burnout, shortening the battery life. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an embedded flow channel of a liquid flow battery to achieve the technical effects of ensuring uniform distribution of electrolyte on the electrodes, reducing concentration extremes, and improving battery life.

[0005] In order to achieve this technical purpose, the utility model adopts the following scheme:

[0006] The invention discloses an embedded flow channel of a liquid flow battery, comprising carbon felt and a liquid flow frame. The carbon felt is embedded in the liquid flow frame, and a plurality of insulating walls are embedded in the carbon felt at intervals. The insulating walls are staggered on the carbon felt to form a tortuous electrolyte flow channel.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] The utility model utilizes an insulating wall to form an electrolyte flow channel, thereby blocking the free flow of the electrolyte and forcing the electrolyte to flow along the direction of the flow channel, so that the electrolyte is more evenly distributed on the electrode, reducing the dead zone area, increasing the unit current density of the electrode, reducing the concentration range, and improving the battery life.

[0009] Furthermore, the preferred embodiment of the present invention is:

[0010] A mounting groove is provided on one side of the carbon felt corresponding to the electrolyte inlet on the liquid flow frame, and the insulating wall is embedded in the mounting groove and fixedly connected to the mounting groove.

[0011] The mounting grooves are arranged at equal intervals on the carbon felt.

[0012] The depth of the mounting groove is ≤ the thickness of the carbon felt.

[0013] The thickness of the insulating wall is ≤ the thickness of the liquid flow frame, and the thickness of the carbon felt is greater than the thickness of the liquid flow frame.

[0014] The insulation wall material is PVC glue, UPVC glue, PMMA, PP or rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of opening a mounting groove on the carbon felt;

[0017] Figure 3 This is a schematic diagram of the device before assembly with the liquid flow frame;

[0018] Figure 4 This is a schematic diagram of the device after assembly with the liquid flow frame;

[0019] The following are marked in the figure: 1. Carbon felt; 2. Glue wall; 3. Electrolyte flow channel; 4. Mounting groove; 5. Liquid flow frame; 6. Diaphragm. DETAILED DESCRIPTION

[0020] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.

[0021] like Figure 1 As shown, an embedded flow channel of a liquid flow battery includes a carbon felt 1 and a liquid flow frame 5. The carbon felt 1 is embedded in the liquid flow frame 5. The carbon felt 1 is staggered up and down, and a number of insulating walls are arranged at intervals on the left and right. The insulating walls constrain the path of the electrolyte on the carbon felt 1 to form a tortuous electrolyte flow channel 3.

[0022] In this embodiment, the insulating wall is a glue wall 2 made of one of PVC glue, UPVC glue, PMMA, PP or rubber.

[0023] Mounting grooves 4 are provided at equal intervals on the side of the carbon felt 1 corresponding to the electrolyte inlet on the liquid flow frame 5. These grooves 4 correspond one-to-one with the adhesive wall 2, which is embedded within the grooves 4. In this embodiment, the depth of the grooves 4 is less than or equal to the thickness of the carbon felt 1. Preferably, the depth of the grooves 4 is equal to the thickness of the carbon felt 1, i.e., the grooves 4 are through-grooves.

[0024] The thickness of the liquid flow frame 5 is less than that of the carbon felt 1 , and the thickness of the adhesive wall 2 is less than or equal to that of the liquid flow frame 5 . The preferred solution is that the thickness of the adhesive wall 2 is equal to that of the liquid flow frame 5 .

[0025] When the carbon felt 1 is not compressed, its thickness is greater than the thickness of the liquid flow frame 5. After the liquid flow frame 5 is pressed by the diaphragm 6 and the electrode plate, the carbon felt 1 is squeezed to the same thickness as the liquid flow frame 6. The electrolyte flows between the diaphragm 6 and the electrode plate along the tortuous flow channel formed by the glue wall 2 on the carbon felt 1. The glue wall 2 blocks the free flow of the electrolyte, forcing the electrolyte to flow along the preset electrolyte flow channel 3, so that the electrolyte is more evenly distributed on the electrode, reducing the area of ​​the dead zone on the carbon felt 1.

[0026] The glue wall 2 blocks the permeation path for the free flow of the electrolyte, allowing the electrolyte to flow along a preset flow channel, thereby making the electrolyte distribution on the entire carbon felt 1 more uniform, which is beneficial to the full reaction of the diaphragm 6.

[0027] Finally, it should be noted that the above-listed examples are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and modifications fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. An embedded flow channel of a flow battery, comprising carbon felt and a flow frame, characterized in that: The carbon felt is embedded in the liquid flow frame, and a plurality of insulating walls are embedded in the carbon felt at intervals. The insulating walls are staggered on the carbon felt to form a tortuous electrolyte flow channel.

2. The embedded flow channel of the flow battery according to claim 1, characterized in that: A mounting groove is provided on one side of the carbon felt corresponding to the electrolyte inlet on the liquid flow frame, and the insulating wall is embedded in the mounting groove and fixedly connected to the mounting groove.

3. The embedded flow channel of the flow battery according to claim 2, characterized in that: The mounting grooves are arranged at equal intervals on the carbon felt.

4. The embedded flow channel of the flow battery according to claim 2, characterized in that: The depth of the mounting groove is ≤ the thickness of the carbon felt.

5. The embedded flow channel of the flow battery according to claim 4, characterized in that: The thickness of the insulating wall is ≤ the thickness of the liquid flow frame, and the thickness of the carbon felt is greater than the thickness of the liquid flow frame.

6. The embedded flow channel of the flow battery according to claim 1, characterized in that: The insulation wall material is PVC glue, UPVC glue, PMMA, PP or rubber.

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