Vanadium battery electrolyte filling device

Abstract

The utility model discloses a vanadium battery electrolyte filling device in the field of vanadium battery electrolytes.The vanadium battery electrolyte filling device comprises a box body and an electrolyte box, the electrolyte box is located in the box body, a stirring mechanism is arranged in the electrolyte box, a constant-temperature mechanism is arranged outside the electrolyte box, a filtering box is arranged in the box body, and the filtering box is arranged in the box body. A liquid outlet pipe is arranged at the bottom of the electrolyte box and extends out of the constant-temperature mechanism, a liquid inlet of the filter box is detachably connected with the liquid outlet pipe of the electrolyte box, an injection hose is detachably connected to a liquid outlet of the filter box, and the end, away from the filter box, of the injection hose extends out of the box body. An infusion pump is arranged between the filter box and the injection hose, and a filter layer is arranged in the filter box. The device is provided with the filter box and the filter mechanism, so that electrolyte precipitation can be directly prevented from entering the vanadium battery to deteriorate the performance of the vanadium battery stack.

Description

Technical Field

[0001] This utility model belongs to the field of vanadium battery electrolyte, and specifically relates to a vanadium battery electrolyte filling device. Background Technology

[0002] Vanadium batteries, also known as vanadium redox flow batteries or all-vanadium flow batteries, are a relatively advanced and widely commercially available redox flow battery based on the metallic vanadium element. A flow battery is a type of battery that consists of a stack (including electrodes and ion exchange membranes), an electrolyte storage and supply unit, and a battery management and control unit. The main difference between vanadium batteries and other batteries lies in the storage method of the electrolyte. When the pentavalent vanadium in the electrolyte of vanadium batteries is left to stand or at a temperature above 45 degrees Celsius, it is easy to precipitate vanadium pentoxide. The precipitated precipitate blocks the flow channels, coats the carbon felt fibers, deteriorates the performance of the stack, and eventually renders the stack unusable.

[0003] Chinese Patent CN219642875U discloses a vanadium battery electrolyte filling device. This device includes a chassis and a filling hose fixed to the bottom right end of the chassis. The filling hose can be bent at any angle. A fixing sleeve is provided at the bottom of the chassis. Electrolyte can be injected into an electrolyte storage tank through the filling port. A novel anti-precipitation device is added to the electrolyte storage tank of this vanadium battery electrolyte filling device. This anti-precipitation device allows for manual stirring of the electrolyte in the storage tank without affecting its normal use. This is because pentavalent vanadium in the vanadium battery electrolyte easily precipitates as vanadium pentoxide when left to stand or at temperatures above 45 degrees Celsius. The precipitated precipitate blocks the flow channels, coats the carbon felt fibers, and deteriorates the performance of the battery stack. Therefore, during electrolyte filling, the anti-precipitation device is needed to re-stir the electrolyte to prevent precipitation and maintain electrolyte quality.

[0004] However, this device only stirs the electrolyte that has precipitated after standing or heating to make the precipitate mix more evenly. It cannot fundamentally solve the problem of electrolyte precipitation. The electrolyte can still precipitate, which will still cause the vanadium battery to contain precipitates after being injected into the vanadium battery, thereby causing blockage inside the vanadium battery and deteriorating the performance of the stack. Utility Model Content

[0005] The present invention aims to provide a vanadium battery electrolyte filling device to solve the problem that existing filling equipment can still produce precipitation, which leads to precipitation being injected into the vanadium battery, causing blockage inside the vanadium battery and deteriorating the performance of the battery stack.

[0006] This solution provides a vanadium battery electrolyte filling device, comprising a housing and an electrolyte tank. The electrolyte tank is located inside the housing and has a stirring mechanism inside. A temperature control mechanism is located outside the electrolyte tank. A filter box is located inside the housing. An outlet pipe is provided at the bottom of the electrolyte tank, extending out of the temperature control mechanism. The inlet of the filter box and the outlet pipe of the electrolyte tank are detachably connected. An injection hose is detachably connected to the outlet of the filter box. The end of the injection hose away from the filter box extends out of the housing. A pump is provided between the filter box and the injection hose. A filter layer is provided inside the filter box.

[0007] The working principle of this solution is as follows: During use, the electrolyte tank contains electrolyte. The injection hose is connected to the electrolyte inlet of the vanadium battery. The pump is started to draw the electrolyte from the electrolyte tank into the vanadium battery. The electrolyte flows into the filter box through the outlet pipe, and then flows through the filter layer into the injection hose from the outlet. After passing through the injection hose, it enters the vanadium battery, completing the electrolyte injection. If the electrolyte has been standing for too long, the stirring mechanism can be started to stir the electrolyte in the electrolyte tank to prevent precipitation. The constant temperature mechanism outside the electrolyte tank can maintain a constant temperature of the electrolyte to avoid precipitation caused by the temperature exceeding 45°C, which would affect the quality of the electrolyte.

[0008] Beneficial effects: 1. Setting up a filter box and filter layer provides a transfer point for the electrolyte as it flows to the vanadium battery. After the precipitate is filtered out in the filter layer, it sinks into the filter box, preventing the precipitate from returning to the electrolyte tank and reducing the quality of the electrolyte.

[0009] 2. The filter box, outlet pipe, and injection hose are all detachable. After a period of use, the filter box can be removed separately to clean the sediment in the filter box, thereby increasing the operating efficiency of the equipment.

[0010] 3. Set up a constant temperature mechanism to keep the electrolyte temperature below 45℃ to prevent precipitation caused by temperature rise;

[0011] 4. The electrolyte tank is equipped with a stirring mechanism, which can stir the electrolyte if it has been standing for too long, thus preventing precipitation.

[0012] Furthermore, the temperature control mechanism includes a temperature control layer and a water tank. The temperature control layer surrounds the electrolyte tank on all sides and at the bottom, with a cavity between the temperature control layer and the electrolyte tank. An outlet pipe and an inlet pipe connect the water tank and the temperature control layer. A water pump is located in the middle of the outlet pipe. Cooling water flows through both the temperature control layer and the water tank. A temperature sensor is fixedly connected to the side wall of the temperature control layer. The temperature sensor and the water pump are connected to an external controller via an electrical signal. In use, cooling water enters between the temperature control layer and the electrolyte tank, lowering the electrolyte temperature. If the temperature sensor detects a rise in cooling water temperature above the required cooling temperature for the electrolyte, the water pump is activated to draw cooling water from the temperature control layer into the water tank. Meanwhile, the cooler cooling water in the water tank enters the temperature control layer through the inlet pipe, creating a circulation and ensuring that the electrolyte temperature remains below 45°C.

[0013] Furthermore, the stirring mechanism includes a stirring shaft and multiple stirring blades. A sealed bearing is fixedly connected to the top of the electrolyte tank, and the inner ring of the sealed bearing is fixedly connected to the stirring shaft. One end of the stirring shaft extends into the electrolyte tank, and the other end is fixedly connected to a motor that drives its rotation. All the stirring blades are located inside the electrolyte tank and are fixedly connected to the stirring shaft. When the electrolyte has been standing for too long, the motor can be turned on to start the stirring shaft and drive the multiple stirring blades to rotate, stirring the electrolyte and preventing precipitation.

[0014] Furthermore, the inlet of the filter box is equipped with a one-way valve. The one-way valve at the inlet directs the flow from the electrolyte tank to the filter box. The one-way valve can prevent the precipitate filtered out of the filter box from re-entering the electrolyte tank, thus affecting the quality of the electrolyte in the electrolyte tank. Moreover, when cleaning, separating the filter box and the outlet pipe can prevent the electrolyte and precipitate from flowing out.

[0015] Furthermore, the top of the enclosure has a through groove with a movable observation door inside. The top of the electrolyte tank has an injection port, which is detachably connected to a sealing cap. When the electrolyte level inside the tank decreases, the observation door can be opened, and then the sealing cap can be opened to add electrolyte into the tank through the injection port.

[0016] Furthermore, an exhaust fan is installed on the side wall of the enclosure, and the exhaust fan is electrically connected to an external controller. When the temperature sensor detects that the internal temperature is too high, it feeds back to the controller, which can then simultaneously control the water pump and the exhaust fan of the water tank to operate. The exhaust fan can then extract the hot air from inside the enclosure, preventing the electrolyte from precipitating due to excessive temperature.

[0017] Furthermore, a through slot is provided on the front side of the housing, and a movable door is hinged to the through slot. A handle is fixedly connected to the side of the movable door away from the hinge. The movable door facilitates the maintenance of the internal equipment and the cleaning of the filter box. Attached Figure Description

[0018] Figure 1 This is a front sectional view of a vanadium battery electrolyte filling device according to the present invention;

[0019] Figure 2 for Figure 1 Top view. Detailed Implementation

[0020] The following detailed description illustrates the specific implementation method:

[0021] The reference numerals in the accompanying drawings of the instruction manual include: 1. Box body; 2. Constant temperature layer; 3. Observation door; 4. Electrolyte tank; 5. Motor; 6. Sealed bearing; 7. Injection port; 8. Exhaust fan; 9. Injection hose; 10. Injection nozzle; 11. Liquid pump; 12. Filter layer; 13. Filter box; 14. One-way valve; 15. Liquid outlet pipe; 16. Stirring blade; 17. Stirring shaft; 18. Movable door; 19. Handle; 20. Water pump; 21. Water outlet pipe; 22. Water tank; 23. Temperature sensor; 24. Water inlet pipe.

[0022] The basic implementation examples are as follows: Figures 1-2 As shown: A vanadium battery electrolyte filling device includes a housing 1, an electrolyte tank 4, a filtration mechanism, a stirring mechanism, and a constant temperature mechanism. A through groove is provided on the front side of the housing 1, and a movable door 18 is hinged in the through groove. A handle 19 is fixedly connected to the front side of the movable door 18 away from the hinge. A through groove is provided on the top of the housing 1, and an observation door 3 is hinged in the through groove. An exhaust fan 8 is fixedly connected to the side wall of the housing 1. The exhaust fan 8 is connected to a controller (e.g., a PLC controller) via an electrical signal.

[0023] The constant temperature mechanism includes a constant temperature layer 2 and a water tank 22. The constant temperature layer 2 is arranged around the perimeter and bottom of the electrolyte tank 4 and is fixedly connected to the electrolyte tank 4. There is a space between the constant temperature layer 2 and the electrolyte tank 4. The water tank 22 is located behind the constant temperature layer 2 and is fixedly connected to the tank body 1. A water outlet pipe 21 and a water inlet pipe 24 are provided between the constant temperature layer 2 and the water tank 22. Both ends of the water outlet pipe 21 and the water inlet pipe 24 are respectively connected to the constant temperature layer 2 and the water tank 22. A water pump 20 is provided in the middle of the water outlet pipe 21. A temperature sensor 23 is fixedly connected to the side wall of the constant temperature layer 2. Both the temperature sensor 23 and the water pump 20 are electrically connected to an external controller.

[0024] The electrolyte tank 4 is located inside the tank body 1. The stirring mechanism is located inside the electrolyte tank 4. The stirring mechanism includes a stirring shaft 17 and eight stirring blades 16. The stirring shaft 17 is coaxially rotatably connected to the electrolyte tank 4. The top end of the stirring shaft 17 extends out of the top of the electrolyte tank 4 and is fixedly connected to a motor 5. A sealed bearing 6 is provided at the contact position between the stirring shaft 17 and the electrolyte tank 4. The outer ring of the sealed bearing 6 is fixedly connected to the electrolyte tank 4, and the inner ring is fixedly connected to the stirring shaft 17. The eight stirring blades 16 are divided into two groups and are arranged in a circular array on two different planes of the stirring shaft 17. They are all fixedly connected to the stirring shaft 17. An injection port 7 is opened at the top of the electrolyte tank 4 near the outer periphery. A sealing cap is detachably connected to the top of the injection port 7. The bottom of the electrolyte tank 4 is connected to an outlet pipe 15, which penetrates the constant temperature layer 2.

[0025] The filtration mechanism includes a filter box 13 and a filter layer 12. The filter box 13 is located inside the box body 1 and is detachably connected to the box body 1. The side wall of the filter box 13 has an inlet, and a one-way valve 14 is fixedly connected to the inlet. The outlet pipe 15 extends out of the constant temperature layer 2 and is detachably connected to the inlet. The top of the filter box 13 has an outlet, and an injection hose 9 is detachably connected to the outlet. The injection hose 9 is equipped with a liquid pump 11. The end of the injection hose 9 away from the filter box 13 extends out of the box body 1 and is fixedly connected to an injection nozzle 10. The filter layer 12 is located inside the filter box 13 and is detachably connected below the outlet. The filter layer 12 can be composed of activated carbon or oil-absorbing cotton.

[0026] The specific implementation process is as follows: Open the sealing cover of the observation door 3 and the injection port 7, add electrolyte to the injection port 7, and the electrolyte will enter the electrolyte tank 4 for storage through the injection port 7. When in use, insert the injection nozzle 10 into the electrolyte inlet of the vanadium battery and fix it, then start the pump 11 to draw out the electrolyte in the electrolyte tank 4, flow into the filter box 13 through the outlet pipe 15, and then through the filter layer 12, flow out of the outlet and into the injection hose 9, and then enter the vanadium battery through the injection nozzle 10. The electrolyte entering the filter box 13 is filtered by the filter layer 12 to prevent precipitation from entering the vanadium battery, and the design of the one-way valve 14 can prevent the precipitation in the filter box 13 from returning to the electrolyte tank 4, thereby affecting the quality of the internal electrolyte. After a period of use, the movable door 18 can be opened to separate the filter box 13 from the outlet pipe 15 and the injection hose 9, and the filter box 13 can be taken out separately for cleaning.

[0027] When storing electrolyte, if the standing time is too long, motor 5 can be turned on to drive the stirring shaft 17 and stirring blade 16 to rotate and stir the electrolyte inside, so as to prevent the electrolyte from precipitating.

[0028] During storage, cooling water is stored in the space between the water tank 22 and the constant temperature layer 2. The cooling water is connected to the water tank 22 through the outlet pipe 21 and the inlet pipe 24 to form a cooling water circulation. When the temperature sensor 23 senses that the cooling water temperature is higher than the required temperature, the water pump 20 can be turned on to pump the cooling water in the constant temperature layer 2 into the water tank 22. The cooling water with a lower temperature in the water tank 22 can then enter the constant temperature layer 2 through pressure to cool the electrolyte. The temperature sensor 23 can also sense the temperature inside the box 1. When the internal temperature is too high, it can be fed back to the controller, which can then start the exhaust fan 8 to pump the high-temperature air inside the box 1 to the outside for cooling, so as to avoid the temperature from being too high and affecting the storage of the electrolyte.

[0029] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A vanadium battery electrolyte filling device, comprising a housing and an electrolyte tank, wherein the electrolyte tank is located inside the housing, and a stirring mechanism is provided inside the electrolyte tank, characterized in that: The electrolyte tank is equipped with a temperature control mechanism on the outside, and a filter box is installed inside the tank. An outlet pipe is opened at the bottom of the electrolyte tank, and the outlet pipe extends out of the temperature control mechanism. The inlet of the filter box and the outlet pipe of the electrolyte tank are detachably connected. An injection hose is detachably connected to the outlet of the filter box. The end of the injection hose away from the filter box extends out of the tank. A pump is installed between the filter box and the injection hose. A filter layer is installed inside the filter box.

2. The vanadium battery electrolyte filling device according to claim 1, characterized in that: The constant temperature mechanism includes a constant temperature layer and a water tank. The constant temperature layer surrounds the electrolyte tank on all sides and at the bottom. A cavity is provided between the constant temperature layer and the electrolyte tank. A water outlet pipe and a water inlet pipe are connected between the water tank and the constant temperature layer. A water pump is provided in the middle of the water outlet pipe. Cooling water flows in both the constant temperature layer and the water tank. A temperature sensor is fixedly connected to the side wall of the constant temperature layer. The temperature sensor and the water pump are connected to an external controller via an electrical signal.

3. The vanadium battery electrolyte filling device according to claim 2, characterized in that: The stirring mechanism includes a stirring shaft and multiple stirring blades. A sealed bearing is fixedly connected to the top of the electrolyte tank. The inner ring of the sealed bearing is fixedly connected to the stirring shaft. One end of the stirring shaft extends into the interior of the electrolyte tank, and the other end of the stirring shaft is fixedly connected to a motor that drives its rotation. The multiple stirring blades are all located inside the electrolyte tank and are fixedly connected to the stirring shaft.

4. The vanadium battery electrolyte filling device according to claim 3, characterized in that: The inlet of the filter box is equipped with a one-way valve.

5. The vanadium battery electrolyte filling device according to claim 4, characterized in that: The top of the box has a through groove, and a movable observation door is provided in the through groove. The top of the electrolyte tank has an injection port, which is detachably connected to a sealing cap.

6. The vanadium battery electrolyte filling device according to claim 5, characterized in that: The side wall of the enclosure is equipped with an exhaust fan, which is electrically connected to an external controller.

7. The vanadium battery electrolyte filling device according to claim 6, characterized in that: The front side of the box has a through groove, and a movable door is hinged to the through groove. A handle is fixedly connected to the side of the movable door away from the hinge.

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