Liquid leakage detection device for electrolyte of flow battery

Abstract

The utility model relates to the field of flow batteries, in particular to a flow battery electrolyte leakage detection device. The device comprises a positive electrode liquid storage tank, a negative electrode liquid storage tank and an energy storage structure, and further comprises a tray arranged below the positive electrode liquid storage tank, the negative electrode liquid storage tank and the energy storage structure, a waste liquid drainage plate used for receiving leaked liquid is arranged in the tray, and the waste liquid drainage plate comprises a bottom plate connected to the tray and a plurality of protrusions installed on the bottom plate. A corrugated groove used for receiving waste liquid is formed between every two adjacent protrusions. After liquid leakage occurs, waste liquid drops into the corrugated grooves, each corrugated groove corresponds to different positions of the positive electrode liquid storage tank, the negative electrode liquid storage tank and the energy storage structure, and the waste liquid is colored, so that an operator can be helped to quickly position the liquid leakage position.

Description

Technical Field

[0001] The present application relates to the field of liquid flow batteries, and in particular to a liquid flow battery electrolyte leakage detection device. Background Art

[0002] Liquid flow battery is a kind of battery that realizes the mutual conversion of electrical energy and chemical energy through the reversible electrochemical redox reaction of active substances in the positive and negative electrolyte solutions. During charging, the positive electrode undergoes an oxidation reaction to increase the valence of the active substance, and the negative electrode undergoes a reduction reaction to reduce the valence of the active substance; the discharge process is the opposite.

[0003] The liquid flow battery energy storage system mainly includes storage tanks, battery stacks, pipelines, etc. for storing electrolyte. The electrolyte circulates in the entire energy storage system, and the sealing requirements of the entire system are extremely high. When an electrolyte leak occurs, an alarm must be issued in time to protect the system, collect waste liquid in a fixed container, and manually find the leak point as soon as possible.

[0004] With respect to the above-mentioned related technologies, the utility model inventor believes that there is a defect that it is difficult to find the leakage point when the fault caused by the leakage needs to be eliminated as soon as possible. Utility Model Content

[0005] In order to find the leak point as quickly as possible.

[0006] The present application provides a flow battery electrolyte leakage detection device that adopts the following technical solution:

[0007] A liquid flow battery electrolyte leakage detection device comprises a positive electrode storage tank, a negative electrode storage tank and an energy storage structure, and also comprises a tray arranged below the positive electrode storage tank, the negative electrode storage tank and the energy storage structure, wherein a waste liquid drainage plate for receiving leaked liquid is arranged in the tray, and the waste liquid drainage plate comprises a bottom plate connected to the tray and a plurality of protrusions installed on the bottom plate, and a corrugated groove for receiving waste liquid is formed between two adjacent protrusions.

[0008] By adopting the above technical solution, after leakage occurs, the waste liquid drips into the corrugated groove. Since each corrugated groove corresponds to a different position of the positive electrode liquid storage tank, the negative electrode liquid storage tank and the energy storage structure, the leakage position can be quickly located.

[0009] Preferably, the bottom plate is a quadrilateral, the four sides of the bottom plate are opposite to each other in pairs, the first group of opposite sides are the first side and the second side, and the second group of opposite sides are the third side and the fourth side; after the bottom plate is connected to the tray, the first side is higher than the second side.

[0010] By adopting the above technical solution, the waste liquid drainage plate forms a certain inclination angle, and the waste liquid is easy to flow down and be collected under the action of gravity.

[0011] Preferably, the third side is higher than the fourth side, the plurality of protrusions are parallel to each other, and the starting point of the protrusions is the first side and the end point is the second side.

[0012] By adopting the above technical solution, the operator can more easily observe the position where the leaked liquid drips on the waste liquid drainage plate from the front.

[0013] Preferably, it further comprises a perforated seepage plate installed on the upper end of the tray, and the waste liquid drainage plate is located between the perforated seepage plate and the bottom of the tray.

[0014] By adopting the above technical solution, impurities can be prevented from entering the tray.

[0015] Preferably, it also includes a waste liquid storage tank arranged below the tray.

[0016] The above technical solution is adopted to collect waste liquid in a unified manner.

[0017] Preferably, a leakage detector is provided in the waste liquid storage tank, and the leakage detector is located at the lowest point in the waste liquid storage tank.

[0018] By adopting the above technical solution, when the waste liquid enters the waste liquid storage tank and contacts the leakage detector, the closed dry contact signal generated therein will send out an audible and visual alarm through the battery management system (BMS system) and stop the system immediately.

[0019] Preferably, it also includes a horizontal LED light strip, which is located on the top of the tray away from the waste liquid storage tank.

[0020] By adopting the above technical solution, since the leaked liquid is a colored liquid, it is easy to observe the position where the leaked liquid drips on the perforated seepage plate after being illuminated by the LED light strip.

[0021] Preferably, the horizontal LED light strip is perpendicular to the extending direction of the protrusion.

[0022] By adopting the above technical solution, the LED light strip is perpendicular to the extending direction of the protrusion and has a large irradiation area.

[0023] Preferably, the positive electrode liquid storage tank and the negative electrode liquid storage tank are engraved with tank body thread drainage grooves to guide the leaked liquid on the tank body to the waste liquid storage tank.

[0024] By adopting the above technical solution, it is convenient to monitor the positive electrode liquid storage tank and the negative electrode liquid storage tank separately.

[0025] Preferably, the positive electrode liquid storage tank and the negative electrode liquid storage tank are both rectangular parallelepiped structures, and vertical LED light strips are provided on the edges of the positive electrode liquid storage tank and the negative electrode liquid storage tank perpendicular to the bottom surface.

[0026] By adopting the above technical solution, since the leaking liquid is a colored liquid, it is easy to find the leakage points of the positive electrode storage tank and the negative electrode storage tank after being illuminated by the LED light strip.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] After leakage occurs, the waste liquid drips into the corrugated groove. Since each corrugated groove corresponds to a different position of the positive electrode liquid storage tank, the negative electrode liquid storage tank and the energy storage structure, the leakage position can be quickly located.

[0029] A waste liquid storage tank is placed under the tray, which can collect and recycle the waste liquid in a unified manner;

[0030] The waste liquid storage tank is equipped with a leakage detector, which can sensitively detect and provide feedback, improve maintenance efficiency and reduce losses.

[0031] The leak detector is only deployed in the waste liquid storage tank, which can effectively reduce the use of leak detection lines and avoid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0033] Figure 2 It is a cross-sectional schematic diagram of the waste liquid drainage plate.

[0034] Figure 3 It is a top view of the overall structure of an embodiment of the present application.

[0035] Figure 4 It is a top view of the positive electrode storage tank.

[0036] Explanation of the accompanying drawings: 1. Positive electrode liquid storage tank; 2. Negative electrode liquid storage tank; 3. Energy storage structure; 4. Tray; 5. Waste liquid storage tank; 6. Waste liquid drainage plate; 61. Protrusion; 62. Bottom plate; 621. First side; 622. Second side; 63. Corrugated groove; 7. Liquid leakage detector; 8. Horizontal LED light strip; 9. Seepage plate with holes; 10. Tank body threaded drainage groove; 11. Vertical LED light strip. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-4 This application is described in further detail.

[0038] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] Reference Figure 1 A liquid flow battery electrolyte leakage detection device comprises a positive electrode liquid storage tank 1, a negative electrode liquid storage tank 2, and an energy storage structure 3 (internal equipment and components include but are not limited to a positive electrode liquid flow pump, a negative electrode liquid flow pump, a battery stack, a heat exchanger, a valve and a piping system).

[0040] Referring to 1, a tray 4 is placed under the positive electrode liquid storage tank 1, the negative electrode liquid storage tank 2, and the energy storage structure 3. The tray 4 is composed of four rectangular PVC plates and has a box structure with openings on both sides. The vertical projections of the positive electrode liquid storage tank 1, the negative electrode liquid storage tank 2, and the energy storage structure 3 are located on the bottom surface of the tray 4, and the upper opening of the tray 4 is upward to receive the leaked liquid.

[0041] refer to Figure 1 , Figure 2 A waste liquid drainage plate 6 is placed in the tray 4. The waste liquid drainage plate 6 includes a bottom plate 62 and a plurality of protrusions 61 arranged on the upper surface of the bottom plate 62. The bottom plate 62 is a quadrilateral PVC plate. The four sides of the bottom plate 62 are opposite to each other. The first group of opposite sides are the first side 621 and the second side 622, and the second group of opposite sides are the third side and the fourth side. Three of the sides are close to the inner wall of the tray 4, and the first side 621 is higher than the second side 622, the third side is higher than the fourth side, and the second side 622 is located in the side opening of the tray 4 for leaking liquid. The plurality of protrusions 61 are parallel to each other, and the starting point of the protrusion 61 is the first side 621, and the end point is the second side 622. The cross section of the protrusion 61 is a triangle, and a corrugated groove 63 is formed between two adjacent protrusions 61.

[0042] refer to Figure 1 , Figure 3 A waste liquid storage tank 5 is arranged under the tray 4. The waste liquid storage tank 5 consists of a bottom wall and four side walls. The waste liquid storage tank 5 opens upward. The vertical projection of the second side 622 is located on the bottom wall of the waste liquid storage tank 5. A leakage detector 7 is arranged on the bottom wall of the waste liquid storage tank 5. The leakage detector 7 is arranged in a strip shape, and the extension direction of the leakage detector 7 is parallel to the second side 622.

[0043] refer to Figure 1 , Figure 4The positive electrode liquid storage tank 1 and the negative electrode liquid storage tank 2 are both rectangular parallelepiped structures, and vertical LED light strips 11 are arranged on the edges of the positive electrode liquid storage tank 1 and the negative electrode liquid storage tank 2 perpendicular to the bottom surface.

[0044] refer to Figure 1 , Figure 3 A horizontal LED light strip 8 is arranged on the top lateral edge of the tray 4 away from the waste liquid storage tank 5 , and the horizontal LED light strip 8 is parallel to the leakage detector 7 .

[0045] refer to Figure 1 The positive electrode storage tank 1 and the negative electrode storage tank 2 are engraved with a tank body threaded drainage groove 10 to guide the leaked liquid on the tank body to the corresponding waste liquid storage tank 5. A perforated seepage plate 9 is arranged on the upper opening of the tray 4. The perforated seepage plate 9 has a plurality of sieve holes through which the leaked liquid can pass. The perforated seepage plate 9 is made of transparent tempered glass.

[0046] The principle of collecting and detecting the leakage of the flow battery system in the embodiment of the present application is:

[0047] When leakage occurs, the leaked liquid will penetrate into the corrugated groove 63 of the waste liquid drainage plate 6 through the perforated seepage plate 9, and the leaked liquid will flow down along the corrugated groove 63 until it contacts the leakage sensor in the waste liquid storage tank 5 and is collected by the waste liquid storage tank 5. The closed dry contact signal generated therein will send out an audible and visual alarm through the BMS system and stop the system immediately, thereby reducing the occurrence of further leakage.

[0048] Since the electrolyte is a colored liquid, by lighting up the horizontal LED light strip 8, the corrugated groove 63 with leaking liquid can be clearly seen, and the position corresponding to the sieve hole above the corrugated groove 63 is the leaking point. After the leak occurs, by lighting up the vertical LED light strip 11, the location of the leaking point can be found according to the color change of the tank thread drainage groove 10.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A liquid flow battery electrolyte leakage detection device, comprising a positive electrode liquid storage tank (1), a negative electrode liquid storage tank (2) and an energy storage structure (3), characterized in that: The invention also comprises a tray (4) arranged below the positive electrode liquid storage tank (1), the negative electrode liquid storage tank (2) and the energy storage structure (3); the tray (4) is provided with a waste liquid drainage plate (6) for receiving leaked liquid; the waste liquid drainage plate (6) comprises a bottom plate (62) connected to the tray (4), a plurality of protrusions (61) mounted on the bottom plate (62), and a corrugated groove (63) for receiving waste liquid is formed between two adjacent protrusions (61).

2. The liquid flow battery electrolyte leakage detection device according to claim 1, characterized in that: The bottom plate (62) is a quadrilateral, and the four sides of the bottom plate (62) are opposite to each other in pairs, the first group of opposite sides are the first side (621) and the second side (622), and the second group of opposite sides are the third side and the fourth side; after the bottom plate (62) is connected to the tray (4), the first side (621) is higher than the second side (622).

3. The liquid flow battery electrolyte leakage detection device according to claim 2, characterized in that: The third side is higher than the fourth side, the plurality of protrusions (61) are parallel to each other, the starting point of the protrusions (61) extending along the first side (621) and the end point of the protrusions (61) extending along the second side (622).

4. The liquid flow battery electrolyte leakage detection device according to claim 3, characterized in that: It also comprises a seepage plate (9) with holes installed on the upper end of the tray (4), and the waste liquid drainage plate (6) is located between the seepage plate (9) with holes and the bottom of the tray (4).

5. The liquid flow battery electrolyte leakage detection device according to claim 4, characterized in that: It also includes a waste liquid storage tank (5) arranged below the tray (4).

6. The liquid flow battery electrolyte leakage detection device according to claim 5, characterized in that: A liquid leakage detector (7) is arranged in the waste liquid storage tank (5), and the liquid leakage detector (7) is located at the lowest point in the waste liquid storage tank (5).

7. The liquid flow battery electrolyte leakage detection device according to claim 6, characterized in that: It also includes a horizontal LED light strip (8), which is located on the top of the tray (4) away from the waste liquid storage tank (5).

8. The liquid flow battery electrolyte leakage detection device according to claim 7, characterized in that: The horizontal LED light strip (8) is perpendicular to the extending direction of the protrusion (61).

9. The liquid flow battery electrolyte leakage detection device according to claim 8, characterized in that: The positive electrode liquid storage tank (1) and the negative electrode liquid storage tank (2) are engraved with tank body threaded drainage grooves (10) to guide the leaked liquid on the tank body to the waste liquid storage tank (5).

10. The liquid flow battery electrolyte leakage detection device according to claim 9, characterized in that: The positive electrode liquid storage tank (1) and the negative electrode liquid storage tank (2) are both rectangular parallelepiped structures, and vertical LED light strips (11) are arranged on the edges of the positive electrode liquid storage tank (1) and the negative electrode liquid storage tank (2) perpendicular to the bottom surface.

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