An all-vanadium redox flow battery

Abstract

The utility model proposes a kind of all-vanadium redox flow battery, it is related to the field of redox flow battery, including protective cover, the inner wall of protective cover is connected with battery stack, the left side surface of battery stack and the right side surface of battery stack are connected with infusion pump, the upper surface of battery stack is communicated with two reflux pipes, the input end of each infusion pump is connected with battery stack communication. The utility model with battery stack as reaction core, left and right two sides infusion pump and multiple section pipeline constitute complete loop, infusion pump accurate drive battery liquid reflux to positive and negative pole tank through first pipe, second pipe, then through reflux pipe and direct back battery stack, ensure that the battery liquid after reaction is recovered in time, reaction battery liquid continues to supply, provide stable condition for oxidation-reduction reaction, temperature sensor real-time monitoring protective cover inner environment, controller accurate linkage heating drive, by high pressure pipe and heating spray head directional heating, temperature can be quickly adjusted to suitable interval.

Description

Technical Field

[0001] This utility model relates to the field of flow batteries, specifically a vanadium redox flow battery. Background Technology

[0002] Vanadium redox flow batteries (VRBs) are characterized by high safety, long cycle life, and fast response, making them ideal for large-scale energy storage needs. In a VRB system, the electrolyte is stored separately in positive and negative electrode tanks and circulates between the stack and the electrolyte tanks via a circulation pump. Oxidation-reduction reactions occur on the electrode surfaces to store and release electrical energy. However, its efficient operation is subject to stringent requirements on the battery electrolyte temperature. Practice has shown that only the range of 5℃-50℃ can maintain the battery's optimal electrochemical activity, ensuring energy storage efficiency and output stability. Temperature deviations can lead to increased internal resistance, decreased charge and discharge efficiency, and in severe cases, alteration of the battery electrolyte's physicochemical properties, shortening battery life.

[0003] Currently, conventional vanadium redox flow batteries generally use an exposed design for their mounting and connection components, which are not optimized for temperature control and anti-clogging. Since the connection components are exposed to the outside environment, the battery fluid directly exchanges heat with the low-temperature environment during transportation. In winter or low-temperature operating conditions, the temperature can easily drop below 5°C, which not only weakens the energy storage performance but also increases the viscosity of the battery fluid, slows down the circulation flow rate, and causes battery fluid crystallization to clog the components. During long-term circulation, the battery fluid is easily affected by concentration fluctuations and local cooling, which can cause vanadate crystals to precipitate and adhere to the inner wall of the components. Initially, this reduces the flow cross-section and increases resistance, but long-term accumulation can completely clog the components, forcing the battery to be shut down for maintenance. To address this, we propose a new vanadium redox flow battery. Utility Model Content

[0004] The purpose of this invention is to provide a vanadium redox flow battery to solve the problems mentioned in the background section and overcome its technical defects.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a vanadium redox flow battery, including a protective cover, a battery stack connected to the inner wall of the protective cover, a liquid infusion pump connected to the left side and the right side of the battery stack, two return pipes connected to the upper surface of the battery stack, the input end of each liquid infusion pump connected to the battery stack, the output end of each liquid infusion pump connected to a first pipe, the output end of each first pipe connected to a second pipe, the output end of one of the second pipes connected to a positive electrode tank, and the output end of the other second pipe connected to a negative electrode tank.

[0006] As a further embodiment of this utility model: the bottom surface of the protective cover is connected to a base, the bottom surface of the base is connected to two support legs, and the front surface of the protective cover is hinged to two protective doors.

[0007] As a further embodiment of this utility model: a warning sign is connected to the front of one of the protective doors, a lock is connected to the front of each of the protective doors, a touch panel is connected to the front of another protective door, a potential board is connected to the front of another protective door, and a set of status indicator lights is connected to the front of the potential board.

[0008] As a further improvement of this utility model: a power interface is embedded on the back of the protective cover, a controller is connected to the back of the protective cover, a signal transmission line is connected to the back of the controller, and the end of the signal transmission line away from the controller is connected to the protective cover.

[0009] As a further embodiment of this utility model: the upper surface of the protective cover is connected to a heating drive, the output end of the heating drive is connected to a high-pressure pipe, the inner top wall of the protective cover is connected to a heating nozzle, the end of the high-pressure pipe away from the heating drive passes through the protective cover and extends into the interior of the protective cover, and the end of the high-pressure pipe away from the heating drive is connected to the heating nozzle.

[0010] As a further improvement of this invention, a temperature sensor is connected to the inner wall of the protective cover.

[0011] As a further embodiment of this utility model: a motor is connected to the bottom surface of each first tube, the output end of each motor passes through the first tube and extends into the interior of the first tube, a drive rod is connected to the output end of each motor, a cleaning brush is connected to the outer surface of each drive rod, and a filter plate is snapped onto the inner wall of each second tube.

[0012] Compared with the prior art, the beneficial effects of this utility model include: using the battery stack as the reaction core, combined with the left and right infusion pumps and multiple pipelines to form a complete circuit, the infusion pumps precisely drive the battery liquid to flow back to the positive and negative electrode tanks through the first and second pipes, and then guide it back to the battery stack through the return pipe, ensuring timely recovery of the battery liquid after the reaction and continuous replenishment of the battery liquid to be reacted, providing stable conditions for the oxidation-reduction reaction, and greatly improving the energy storage and release efficiency. The temperature sensor monitors the environment inside the protective cover in real time, and the controller precisely links the heating drive. Through the high-pressure pipe and the heating nozzle, the temperature can be quickly adjusted to a suitable range, avoiding the decrease in battery activity due to low temperature. The motor drives the drive rod to drive the cleaning brush to actively remove the crystals on the inner wall of the first pipe, and cooperates with the filter plate of the second pipe to filter impurities. Attached Figure Description

[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0014] Figure 1The schematic diagram shows a three-dimensional structural diagram of an all-vanadium redox flow battery according to one embodiment of the present invention;

[0015] Figure 2 The diagram schematically shows a rear-view perspective three-dimensional structure of an all-vanadium redox flow battery according to one embodiment of the present invention.

[0016] Figure 3 The diagram schematically shows a front cross-sectional view of a protective shield in an all-vanadium redox flow battery according to one embodiment of the present invention.

[0017] Figure 4 The schematic diagram shows a three-dimensional structural diagram of a battery stack in an all-vanadium redox flow battery according to one embodiment of the present invention;

[0018] Figure 5 The diagram schematically shows a front cross-sectional view of the second tube in an all-vanadium redox flow battery according to one embodiment of the present invention.

[0019] The following are labeled in the diagram: 1. Protective cover; 2. Warning sign; 3. Protective door; 4. Return pipe; 5. Base; 6. Support foot; 7. Potential plate; 8. Status indicator light; 9. Touch panel; 10. Lock; 11. Cleaning brush; 12. Heating drive; 13. High-pressure pipe; 14. Controller; 15. Signal transmission line; 16. Power interface; 17. Positive electrode tank; 18. Negative electrode tank; 19. Battery stack; 20. Heating nozzle; 21. Infusion pump; 22. First pipe; 23. Temperature sensor; 24. Second pipe; 25. Filter plate; 26. Motor; 27. Drive rod. Detailed Implementation

[0020] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0021] According to one embodiment of the present invention, in conjunction with the appended drawings Figure 1-5 As shown.

[0022] Example 1

[0023] A vanadium redox flow battery includes a protective shield 1. A battery stack 19 is connected to the inner wall of the protective shield 1. Infusion pumps 21 are connected to both the left and right sides of the battery stack 19. Two return pipes 4 are connected to the upper surface of the battery stack 19. The input end of each infusion pump 21 is connected to the battery stack 19, and the output end of each infusion pump 21 is connected to a first pipe 22. The output end of each first pipe 22 is connected to a second pipe 24. One of the second pipes 24 is connected to a positive electrode tank 17, and the other second pipe... The output end of 24 is connected to the negative electrode tank 18. The battery stack 19 is the core reaction area. The infusion pumps 21 on the left and right sides provide circulation power. The input end of the infusion pump 21 is connected to the battery stack 19. During operation, the battery liquid after reaction is extracted and returned to the positive electrode tank 17 and the negative electrode tank 18 through the first pipe 22 and the second pipe 24, respectively. The two return pipes 4 on the upper surface of the battery stack 19 guide the battery liquid to be reacted in the positive and negative electrode tanks back to form a complete liquid flow loop. Temperature control is achieved by the temperature sensor 23, the controller 14, the heating drive 12, etc.

[0024] Example 2

[0025] The bottom of the protective cover 1 is connected to a base 5, and the bottom of the base 5 is connected to two support feet 6. Two protective doors 3 are hinged to the front of the protective cover 1. One of the protective doors 3 has a warning sign 2 connected to its front. Each protective door 3 has a lock 10 connected to its front. The other protective door 3 has a touch panel 9 connected to its front, and a potentiometer 7 connected to its front. A set of status indicator lights 8 are connected to the front of the potentiometer 7. A power interface 16 is embedded in the back of the protective cover 1. A controller 14 is connected to the back of the protective cover 1. A signal transmission line 15 is connected to the back of the controller 14, and the signal transmission line 15 is located away from the controller. One end of the device 14 is connected to the protective cover 1. The temperature sensor 23 monitors the temperature inside the protective cover 1 and provides feedback. When the temperature is low, the controller 14 starts the heating drive 12. The heating medium is sent to the heating nozzle 20 through the high-pressure pipe 13 to heat the battery stack 19 and its surroundings. The anti-clogging protection is achieved by the motor 26 driving the drive rod 27 to drive the cleaning brush 11 to remove the crystals on the inner wall of the first tube 22. This works in conjunction with the filter plate 25 on the inner wall of the second tube 24 to filter impurities. Control and monitoring are achieved by the controller 14 receiving signals from the components through the signal transmission line 15 and receiving instructions through the touch panel 9. The status indicator light 8 on the potentiometer 7 provides feedback on the status, and the warning sign 2 serves as a warning.

[0026] Example 3

[0027] A heating drive 12 is connected to the upper surface of the protective cover 1. The output end of the heating drive 12 is connected to a high-pressure pipe 13. A heating nozzle 20 is connected to the inner top wall of the protective cover 1. The end of the high-pressure pipe 13 away from the heating drive 12 passes through the protective cover 1 and extends into the interior of the protective cover 1. The end of the high-pressure pipe 13 away from the heating drive 12 is connected to the heating nozzle 20. A temperature sensor 23 is connected to the inner wall of the protective cover 1. A motor 26 is connected to the bottom surface of each first tube 22. The output end of each motor 26 passes through the first tube 22 and extends into the interior of the first tube 22. Each motor 26 has a drive rod 27 connected to its output end. Each drive rod 27 has a cleaning brush 11 connected to its outer surface. Each second tube 24 has a filter plate 25 snapped onto its inner wall. When using the device, first check the base 5 and support feet 6 to ensure that the protective cover 1 is stable. Connect the device to the power interface 16 and observe the status indicator light 8 to confirm that it is in standby mode. Then set the parameters through the touch panel 9. After starting the device, the infusion pump 21 will run. The battery fluid will enter the battery stack 19 through the return pipe 4 to start the circulation. Monitor the temperature during operation and heat it when the temperature is low. The motor 26 and filter plate 25 are protected against clogging.

[0028] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A vanadium redox flow battery, characterized in that, The device includes a protective cover (1), the inner wall of which is connected to a battery stack (19). Both the left and right sides of the battery stack (19) are connected to infusion pumps (21). The upper surface of the battery stack (19) is connected to two return pipes (4). The input end of each infusion pump (21) is connected to the battery stack (19). The output end of each infusion pump (21) is connected to a first pipe (22). The output end of each first pipe (22) is connected to a second pipe (24). The output end of one of the second pipes (24) is connected to a positive electrode tank (17), and the output end of the other second pipe (24) is connected to a negative electrode tank (18).

2. The all-vanadium redox flow battery according to claim 1, characterized in that, The bottom surface of the protective cover (1) is connected to a base (5), and the bottom surface of the base (5) is connected to two support feet (6). The front surface of the protective cover (1) is hinged to two protective doors (3).

3. The all-vanadium redox flow battery according to claim 2, characterized in that, One of the protective doors (3) has a warning sign (2) connected to its front, and each of the protective doors (3) has a lock (10) connected to its front. Another protective door (3) has a touch panel (9) connected to its front, and another protective door (3) has a power board (7) connected to its front. The power board (7) has a set of status indicator lights (8) connected to its front.

4. The all-vanadium redox flow battery according to claim 3, characterized in that, The protective cover (1) has a power interface (16) embedded on its back. The protective cover (1) is connected to a controller (14). The controller (14) is connected to a signal transmission line (15) on its back. The end of the signal transmission line (15) away from the controller (14) is connected to the protective cover (1).

5. A vanadium redox flow battery according to claim 4, characterized in that, The upper surface of the protective cover (1) is connected to a heating drive (12), the output end of the heating drive (12) is connected to a high-pressure pipe (13), the inner top wall of the protective cover (1) is connected to a heating nozzle (20), the end of the high-pressure pipe (13) away from the heating drive (12) passes through the protective cover (1) and extends into the interior of the protective cover (1), and the end of the high-pressure pipe (13) away from the heating drive (12) is connected to the heating nozzle (20).

6. A vanadium redox flow battery according to claim 5, characterized in that, A temperature sensor (23) is connected to the inner wall of the protective cover (1).

7. The all-vanadium redox flow battery according to claim 1, characterized in that, Each of the first tubes (22) has a motor (26) connected to its bottom surface. The output end of each motor (26) passes through the first tube (22) and extends into the interior of the first tube (22). The output end of each motor (26) is connected to a drive rod (27). The outer surface of each drive rod (27) is connected to a cleaning brush (11). The inner wall of each of the second tubes (24) is fitted with a filter plate (25).

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