CN-224232662-U - Online liquid blowing device of flow battery pile

Abstract

The utility model provides an online liquid blowing device of a flow battery pile, which comprises a positive electrode liquid storage tank, a negative electrode liquid storage tank, a liquid return pipe, a liquid inlet pipe, a liquid blowing air pipe and corresponding control valves, wherein one end of the liquid return pipe is connected with the top of the pile, the other end of the liquid return pipe is connected with the upper part of the side wall of the liquid storage tank, a liquid return ball valve for cutting off a reflux path of electrolyte is arranged, the liquid inlet pipe is connected with the bottom of the liquid storage tank and a bottom interface of the pile, a magnetic pump and a liquid inlet valve are arranged to realize circulating transportation of electrolyte, one end of the liquid blowing air pipe is connected with an external inert gas source, the other end of the liquid blowing air pipe is connected with the liquid return pipe through an air pipe joint to be close to the pile section, the liquid return valve is arranged on the pipeline of the section for controlling gas introduction, and an exhaust valve is arranged at the top of the liquid storage tank. The utility model solves the problems of low efficiency and complicated procedures of the traditional pile liquid discharge process, has high efficiency, safety and environmental protection, and is suitable for the automatic production requirements of the flow battery manufacturing and testing links.

Inventors

• YIN XIAOHENG
• Qiu Minglei
• YUAN YAN
• CHEN JIA
• TANG GANG
• YAN SU
• Zhao Meibo
• ZHANG ZHEN
• CHEN YANG

Assignees

• 张家港德泰储能装备有限公司

Dates

Publication Date

20260512

Application Date

20250527

Claims (6)

1. 1. The utility model provides a flow battery pile blows liquid device on line which characterized in that includes: the liquid storage tank (1) comprises an anode liquid storage tank and a cathode liquid storage tank; a liquid return pipe (5), one end of which is connected with the top of the galvanic pile (2) and the other end of which is connected with the upper part of the side wall of the liquid storage tank (1), wherein a liquid return ball valve (4) is arranged on the liquid return pipe (5); a liquid inlet pipe (6), one end of which is connected with the bottom of the side wall of the liquid storage tank (1) and the other end of which is connected with a bottom interface of the galvanic pile (2), wherein the liquid inlet pipe (6) is provided with a magnetic pump (12) and a liquid inlet valve (10); One end of the liquid blowing air pipe (3) is connected with an external inert air source, and the other end of the liquid blowing air pipe is connected to a pipe section of the liquid return pipe (5) close to the galvanic pile (2) through an air pipe joint (8); a liquid return valve (11) is arranged on the liquid return pipe (5) between the air pipe joint (8) and the electric pile (2); the top of the liquid storage tank (1) is provided with an exhaust valve (9) for discharging gas generated in the liquid blowing process.
2. 2. The on-line liquid blowing device of the flow battery pile according to claim 1, wherein the liquid return ball valve (4) is positioned on a liquid return pipe (5) between the side wall of the liquid storage tank (1) and the air pipe joint (8) and is used for blocking the flow of electrolyte and gas to the liquid storage tank (1).
3. 3. The on-line liquid blowing device of the flow battery pile according to claim 1, wherein a magnetic pump (12) arranged on the liquid inlet pipe (6) is arranged near the bottom of the side wall of the liquid storage tank (1), and the liquid inlet valve (10) is arranged near the bottom interface of the pile (2).
4. 4. The flow battery pile on-line liquid blowing device according to claim 1, wherein the exhaust valve (9) is a gas flow control valve with scale display.
5. 5. The on-line liquid blowing device of the flow battery pile according to claim 1, wherein an independent air pipe valve (7) is arranged at the joint of the liquid blowing air pipe (3) and the air pipe joint (8), and the air pipe valve (7) is a two-position three-way valve.
6. 6. The on-line liquid blowing device of the flow battery pile according to claim 1 is characterized in that an exhaust valve (9) at the top of the liquid storage tank (1) is connected with a gas recovery device or a gas treatment device.

Description

Online liquid blowing device of flow battery pile Technical Field The utility model belongs to the technical field of flow batteries, and particularly relates to an online liquid blowing device for a flow battery electric pile. Background In the research and development and production process of the vanadium redox flow battery, the electrical performance test is a key step for ensuring the performance of the vanadium redox flow battery to reach the standard. After the completion of the test, in order to prevent problems such as corrosion, crystallization blockage, and the like caused by electrolyte residue, and to ensure stability and safety in subsequent large-scale applications, it is necessary to completely discharge the electrolyte inside the stack. The operation is not only beneficial to protecting the performance of the battery and prolonging the service life of the battery, but also realizes the recycling of resources by effectively recycling the redundant electrolyte in consideration of the high value of the electrolyte, thereby improving the overall economic benefit. Therefore, specialized processing methods are critical to optimizing vanadium redox flow battery applications. The existing electrolyte discharging technology comprises a gravity liquid discharging method, a vacuum suction method and a gas blowing and discharging method. Gravity drainage is suitable for small stacks, such as laboratory-grade devices (power <1 kW), but for higher power stacks (e.g., 32kW single stack weighing about 1.2 tons), the drainage efficiency and thoroughness are difficult to meet. The vacuum suction principle is more suitable for complete drainage operations in laboratory environments requiring precise control, but is not suitable for use in large-scale production due to equipment complexity and cost issues. In contrast, the gas blowing and exhausting method is suitable for medium-large electric piles (the power is more than or equal to 10 kW), and can realize quick liquid exhaust, but in practical application, the process usually needs to move the tested electric pile to a specific place, gas is manually accessed and liquid exhaust operation is carried out by repeatedly controlling the on-off of the gas, the process is monotonously repeated, a great deal of time and labor are consumed, the operation cost is increased, and the high-efficiency implementation of batch application is not facilitated. Disclosure of Invention The embodiment of the utility model aims to provide an online liquid blowing device for a flow battery pile, so as to solve the problems of low efficiency, high manual dependency and inapplicability to large-scale production and realize rapid, automatic and thorough discharge and recovery of electrolyte. In order to solve the technical problems, the technical scheme adopted by the utility model is that the liquid blowing device for the flow battery pile comprises: the liquid storage tank comprises a positive electrode liquid storage tank and a negative electrode liquid storage tank; one end of the liquid return pipe is connected with the top of the electric pile, the other end of the liquid return pipe is connected with the upper part of the side wall of the liquid storage tank, and a liquid return ball valve is arranged on the liquid return pipe; One end of the liquid inlet pipe is connected with the bottom of the side wall of the liquid storage tank, the other end of the liquid inlet pipe is connected with a bottom interface of the electric pile, and a magnetic pump and a liquid inlet valve are arranged on the liquid inlet pipe; One end of the liquid blowing air pipe is connected with an external inert air source, the other end is connected to the air pipe joint the liquid return pipe is close to the pipe section of the electric pile; a liquid return valve is arranged on a liquid return pipe between the air pipe joint and the electric pile; The top of the liquid storage tank is provided with an exhaust valve for discharging gas generated in the liquid blowing process. Further, the liquid return ball valve is positioned on a liquid return pipe between the side wall of the liquid storage tank and the air pipe joint and used for blocking the flow of electrolyte and gas to the liquid storage tank. Further, the magnetic pump arranged on the liquid inlet pipe is arranged close to the bottom of the side wall of the liquid storage tank, and the liquid inlet valve is arranged close to the bottom interface of the galvanic pile. Further, the exhaust valve is a gas flow control valve with scale display. Furthermore, an independent air pipe valve is arranged at the joint of the liquid blowing air pipe and the air pipe joint, and the air pipe valve is a two-position three-way valve. Further, an exhaust valve at the top of the liquid storage tank is connected with a gas recovery device or a gas treatment device. The utility model has the advantages that the utility model realizes the rapid discharge and high