Vanadium battery system electrolyte valence state on-line monitoring device

Abstract

The utility model discloses a vanadium battery system electrolyte valence state on-line monitoring device, and relates to the technical field of vanadium battery system state detection. The device comprises a vertically-arranged electrolyte conveying pipe, the conveying direction in the electrolyte conveying pipe is upward conveying electrolysis, a sampling pipe is constructed on the electrolyte conveying pipe, the liquid inlet end and the liquid outlet end of the sampling pipe are both communicated with the electrolyte conveying pipe, the liquid inlet end is arranged under the liquid outlet end, and the liquid outlet end of the sampling pipe is arranged under the liquid outlet end. An ultraviolet spectrometer is mounted on the sampling tube, and a sample cavity of the ultraviolet spectrometer is communicated with the sampling tube; the purpose of detecting the valence state of the electrolyte at any time in the running process of the all-vanadium battery is achieved.

Description

Technical Field

[0001] This utility model relates to the field of vanadium battery system status detection technology, specifically, it is an online monitoring device for the valence state of electrolyte in a vanadium battery system. Background Technology

[0002] The valence state changes of vanadium ions in the vanadium redox flow battery electrolyte are the core of its working principle. In a vanadium redox flow battery, the electrolyte is mainly composed of vanadium ions in different valence states. The positive electrode electrolyte contains tetravalent and pentavalent vanadium ions, while the negative electrode electrolyte contains divalent and trivalent vanadium ions. These vanadium ions undergo valence state conversion through redox reactions during battery charging and discharging, thereby achieving the storage and release of electrical energy.

[0003] During continuous recycling of the electrolyte, its valence state gradually changes, deviating from the standard valence state. Currently, most electrolyte valence state testing is conducted while the battery is shut down, by sampling from the electrolyte storage tank and then testing the samples. This significantly reduces the efficiency of vanadium batteries. Regular shutdowns for inspection are necessary. Utility Model Content

[0004] The purpose of this invention is to provide an online monitoring device for the valence state of electrolyte in a vanadium battery system, so as to realize the purpose of detecting the valence state of the electrolyte at all times during the operation of the vanadium battery.

[0005] To achieve the above objectives, the present invention employs the following technical means:

[0006] An online monitoring device for the valence state of electrolyte in a vanadium battery system includes a vertically arranged electrolyte delivery pipe, wherein the electrolyte is delivered upwards within the delivery pipe. A sampling pipe is constructed on the electrolyte delivery pipe, and both the inlet and outlet ends of the sampling pipe are connected to the electrolyte delivery pipe. The inlet end is located directly below the outlet end. An ultraviolet spectrometer is installed on the sampling pipe, and the sample chamber of the ultraviolet spectrometer is connected to the sampling pipe.

[0007] Preferably, the ultraviolet spectrometer includes a housing, in which a vertical sample tube is disposed. An ultraviolet generator and a light receiver are disposed opposite each other on the horizontal sides of the sample tube. The vertical ends of the sample tube are connected through the upper and lower ends of the housing. The top and bottom surfaces of the housing are respectively constructed with a first connecting pipe and a second connecting pipe that communicate with the sample tube. Both the first connecting pipe and the second connecting pipe are used to communicate with the sampling tube.

[0008] Furthermore, the sample tube is a rectangular tube, and the ultraviolet generator and the light receiver are respectively facing one plane of the sample tube.

[0009] Furthermore, the sampling tube includes a first inlet pipe as the inlet end, and a vertical second inlet pipe is connected to the end of the first inlet pipe away from the electrolyte delivery pipe. The second inlet pipe is threadedly connected to the second connecting pipe.

[0010] Furthermore, the sampling tube also includes a first outlet pipe as the outlet end, and the end of the first outlet pipe away from the electrolyte delivery pipe is connected to a second outlet pipe extending vertically downward, and the second outlet pipe is threadedly connected to the first connecting pipe.

[0011] Furthermore, the second outlet pipe includes a connecting pipe that communicates with the first outlet pipe. The bottom end of the connecting pipe is connected to the first communicating pipe through a flexible hose segment. The flexible hose segment includes a first threaded pipe that is threaded to the connecting pipe and a second threaded pipe that is threaded to the first communicating pipe. The first threaded pipe and the second threaded pipe are connected through a soft tube, and the thread directions of the first threaded pipe and the second threaded pipe are opposite.

[0012] Furthermore, the bottom end of the connection between the first inlet pipe and the electrolyte delivery pipe is constructed as an arc structure.

[0013] Furthermore, the top end of the connection between the first outlet pipe and the electrolyte delivery pipe is constructed as an arc structure.

[0014] This utility model has the following beneficial effects during use:

[0015] During battery system operation, the electrolyte flows from bottom to top in the electrolyte delivery tube. Along this flow direction, a portion of the electrolyte enters the sampling tube through the inlet and then gradually flows upwards through the sampling tube. As the electrolyte flows through the sampling tube, it passes through the ultraviolet spectrometer and then flows back into the electrolyte delivery tube through the outlet, ensuring a constant electrolyte pressure in the delivery tube. Simultaneously, when the electrolyte flows through the ultraviolet spectrometer, the ultraviolet light passing through the electrolyte sends different light signals to the light receiver based on the different valence states of the substances in the electrolyte. The ultraviolet spectrometer then outputs different signals to determine the valence state of the electrolyte. This allows for continuous monitoring of the electrolyte valence state during battery system operation, eliminating the need for frequent periodic shutdowns for testing and significantly improving battery efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the longitudinal section of the ultraviolet spectrometer of this utility model.

[0018] Figure 3 This is a cross-sectional schematic diagram of the ultraviolet spectrometer of this utility model.

[0019] Figure 4 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0020] Figure 5 for Figure 1 A magnified schematic diagram of the structure at point B in the middle.

[0021] Among them, 1-electrolyte delivery tube, 2-sampling tube, 3-ultraviolet spectrometer, 4-box, 5-sample tube, 6-ultraviolet generator, 7-light receiver, 8-first connecting tube, 9-second connecting tube, 10-first liquid inlet tube, 11-second liquid inlet tube, 12-first liquid outlet tube, 13-second liquid outlet tube, 14-first threaded tube, 15-second threaded tube, 16-soft tube. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please refer to Figures 1 to 5 As shown, an online monitoring device for the valence state of electrolyte in a vanadium battery system includes a vertically arranged electrolyte delivery pipe 1, wherein the electrolyte is delivered upwards within the electrolyte delivery pipe 1. A sampling pipe 2 is constructed on the electrolyte delivery pipe 1, and both the inlet and outlet ends of the sampling pipe 2 are connected to the electrolyte delivery pipe 1. The inlet end is located directly below the outlet end. An ultraviolet spectrometer 3 is installed on the sampling pipe 2, and the sample chamber of the ultraviolet spectrometer 3 is connected to the sampling pipe 2.

[0029] In this way, during the operation of the battery system, the electrolyte flows from bottom to top in the electrolyte delivery pipe 1. Along the flow direction, a portion of the electrolyte enters the sampling pipe 2 through the inlet end and then gradually flows through the sampling pipe 2 from bottom to top. During its flow through the sampling pipe 2, the electrolyte passes through the ultraviolet spectrometer 3 and then flows back to the electrolyte delivery pipe 1 through the outlet end of the sampling pipe 2, thus ensuring that the electrolyte pressure in the electrolyte delivery pipe 1 remains constant. Simultaneously, when the electrolyte flows through the ultraviolet spectrometer 3, the ultraviolet light, after passing through the electrolyte, can send different light signals to its light receiver based on the different valence states of substances in the electrolyte. The ultraviolet spectrometer 3 then outputs different signals to determine the valence state of the electrolyte. This allows for continuous monitoring of the electrolyte valence state during battery system operation, eliminating the need for frequent periodic shutdowns for testing and significantly improving battery efficiency.

[0030] Furthermore, the ultraviolet spectrometer 3 includes a housing 4, inside which a vertical sample tube 5 is provided. An ultraviolet generator 6 and a light receiver 7 are arranged opposite each other on the horizontal sides of the sample tube 5. The vertical ends of the sample tube 5 are connected through the upper and lower ends of the housing 4. The top and bottom surfaces of the housing 4 are respectively constructed with a first connecting pipe 8 and a second connecting pipe 9 that communicate with the sample tube 5. Both the first connecting pipe 8 and the second connecting pipe 9 are used to communicate with the sampling tube 2.

[0031] Furthermore, the sample tube 5 is a rectangular tube, and the ultraviolet generator 6 and the light receiver 7 are respectively facing one plane of the sample tube 5.

[0032] Furthermore, the sampling tube 2 includes a first inlet pipe 10 as the inlet end, and a vertical second inlet pipe 11 is connected to one end of the first inlet pipe 10 away from the electrolyte delivery pipe 1. The second inlet pipe 11 is threadedly connected to the second connecting pipe 9.

[0033] Furthermore, the sampling tube 2 also includes a first outlet tube 12 as the outlet end, and the end of the first outlet tube 12 away from the electrolyte delivery tube 1 is connected to a second outlet tube 13 extending vertically downward, and the second outlet tube 13 is threadedly connected to the first connecting tube 8.

[0034] Furthermore, the second outlet pipe 13 includes a connecting pipe that communicates with the first outlet pipe 12. The bottom end of the connecting pipe is connected to the first connecting pipe 8 through a flexible hose section. The flexible hose section includes a first threaded pipe 14 that is threaded to the connecting pipe and a second threaded pipe 15 that is threaded to the first connecting pipe 8. The first threaded pipe 14 and the second threaded pipe 15 are connected through a soft tube 16. The threads of the first threaded pipe 14 and the second threaded pipe 15 are arranged in opposite directions.

[0035] In this way, by using the reverse arrangement of the first threaded tube 14 and the second threaded tube 15, even when installing the flexible hose section, the first threaded tube 14 and the second threaded tube 15 can be installed synchronously in the same direction of rotation, avoiding the soft tube 16 from getting tangled during the threaded installation process.

[0036] Furthermore, in order to facilitate the electrolyte to enter the first inlet pipe 10 from the electrolyte delivery pipe 1 more easily, and at the same time to facilitate the electrolyte to return to the electrolyte delivery pipe 1 from the first outlet pipe 12 more easily, the bottom end of the connection between the first inlet pipe 10 and the electrolyte delivery pipe 1 is constructed with an arc structure.

[0037] Meanwhile, the top end of the connection between the first liquid outlet pipe 12 and the electrolyte delivery pipe 1 is constructed as an arc structure.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An online monitoring device for the valence state of electrolyte in a vanadium battery system, comprising a vertically arranged electrolyte delivery pipe (1), wherein the delivery direction within the electrolyte delivery pipe (1) is upward delivery of electrolyte, characterized in that, A sampling tube (2) is constructed on the electrolyte delivery tube (1). The inlet and outlet ends of the sampling tube (2) are connected to the electrolyte delivery tube (1). The inlet end is located directly below the outlet end. An ultraviolet spectrometer (3) is installed on the sampling tube (2). The sample chamber of the ultraviolet spectrometer (3) is connected to the sampling tube (2). The sampling tube (2) also includes a first outlet tube (12) as the outlet end, and the end of the first outlet tube (12) away from the electrolyte delivery tube (1) is connected to a second outlet tube (13) extending vertically downward, and the second outlet tube (13) is threadedly connected to the first connecting tube (8). The second outlet pipe (13) includes a connecting pipe that communicates with the first outlet pipe (12). The bottom end of the connecting pipe is connected to the first connecting pipe (8) through a flexible hose section. The flexible hose section includes a first threaded pipe (14) that is threaded to the connecting pipe and a second threaded pipe (15) that is threaded to the first connecting pipe (8). The first threaded pipe (14) and the second threaded pipe (15) are connected through a soft tube (16). The threads of the first threaded pipe (14) and the second threaded pipe (15) are arranged in opposite directions.

2. The online monitoring device for the valence state of the electrolyte in a vanadium battery system according to claim 1, characterized in that, The ultraviolet spectrometer (3) includes a housing (4), inside which is a vertical sample tube (5). On the horizontal sides of the sample tube (5) are an ultraviolet generator (6) and a light receiver (7). The vertical ends of the sample tube (5) are connected and pass through the upper and lower ends of the housing (4). The top and bottom surfaces of the housing (4) are respectively constructed with a first connecting pipe (8) and a second connecting pipe (9) that communicate with the sample tube (5). Both the first connecting pipe (8) and the second connecting pipe (9) are used to communicate with the sampling tube (2).

3. The online monitoring device for the valence state of the electrolyte in a vanadium battery system according to claim 2, characterized in that, The sample tube (5) is a rectangular tube, and the ultraviolet generator (6) and the light receiver (7) are respectively facing one plane of the sample tube (5).

4. The online monitoring device for the valence state of the electrolyte in a vanadium battery system according to claim 2, characterized in that, The sampling tube (2) includes a first inlet tube (10) as the inlet end, and a vertical second inlet tube (11) is connected to one end of the first inlet tube (10) away from the electrolyte delivery tube (1). The second inlet tube (11) is threadedly connected to the second connecting tube (9).

5. The online monitoring device for the valence state of the electrolyte in a vanadium battery system according to claim 4, characterized in that, The bottom end of the connection between the first liquid inlet pipe (10) and the electrolyte delivery pipe (1) is constructed as an arc structure.

6. The online monitoring device for the valence state of the electrolyte in a vanadium battery system according to claim 1, characterized in that, The top end of the connection between the first liquid outlet pipe (12) and the electrolyte delivery pipe (1) is constructed as an arc structure.

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