Flow battery energy storage tank

Abstract

This utility model discloses a flow battery energy storage tank, including a tank body, an installation port, an inspection cover, and a delivery pipe. The main feature is a pipe groove on the top of the tank body that matches the outer contour of the delivery pipe, allowing the delivery pipe to be detachably secured within the groove, thus better ensuring the stability of the delivery pipe structure. This avoids mechanical vibration and displacement of the delivery pipe during delivery, eliminating leakage accidents at the connection between the delivery pipe and the tank body, and also avoids fluid resistance fluctuations caused by pipe torsion, greatly facilitating pipe maintenance. Furthermore, a pipe assembly is installed inside the tank, connected to the installation port and communicating with the delivery pipe. Battery fluid is introduced into the pipe assembly and injected into the tank through multiple outlet holes on the pipe assembly at a predetermined flow rate distribution ratio. This effectively reduces the impact of delivery within the tank, prevents turbulence and eddy zones caused by battery fluid deposition at the bottom of the tank, ensures the uniformity of battery fluid mixing, and extends service life.

Description

Technical Field

[0001] This utility model relates to an energy storage tank, specifically a flow battery energy storage tank. Background Technology

[0002] As a novel electrochemical energy storage device, flow batteries primarily achieve energy conversion through a redox reaction formed by the controlled flow of positive and negative electrode electrolytes (collectively referred to as battery solution) across an ion-exchange membrane. Compared to traditional solid-state electrode batteries, the battery solution in flow batteries is stored in an external storage tank and circulated through a delivery system. However, existing energy storage tank designs suffer from the following key technical bottlenecks: First, there are fluid dynamics issues. Current energy storage tanks generally adopt a top-direct-filling liquid injection structure, which means that the battery fluid is directly injected into the tank through an external infusion pipe connected to a flange on the tank body. This generates a large impact flow velocity, causing the battery fluid deposited at the bottom of the tank to be impacted, resulting in turbulence and the formation of eddy zones. This affects the mixing uniformity of the battery fluid, and long-term operation can easily lead to increased concentration polarization on both sides of the ion membrane and reduce the service life of the flow battery. Second, there are structural stability issues. The industry common practice is to simply place the infusion pipe on top of the tank body. This will cause mechanical vibration and displacement of the infusion pipe during the liquid delivery process, thereby increasing the risk of leakage at the flange connection. It may even cause pipe torsion and fluctuations in liquid flow resistance, and also bring great difficulties to pipe positioning during maintenance. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a flow battery energy storage tank that can reduce the impact of liquid delivery inside the tank and ensure the structural stability of the liquid delivery pipe.

[0004] The technical problem of this utility model is solved by the following technical solution:

[0005] A flow battery energy storage tank includes a tank body for storing battery fluid, an installation port on the tank body, and an inspection cover on the top of the tank body. It also includes a delivery pipe connected to the installation port. The top of the tank body has a pipe groove that matches the outer contour of the delivery pipe, and the delivery pipe is detachably snapped into the pipe groove. The tank body contains a pipe assembly with multiple outlet holes. The pipe assembly is connected to the installation port and communicates with the delivery pipe. Battery fluid is introduced into the pipe assembly through the delivery pipe and then injected into the tank body through the multiple outlet holes at a predetermined flow rate distribution ratio.

[0006] The inspection cover is equipped with an interface for installing monitoring components.

[0007] The tank body has a step on the front side of the top, and there are installation openings on both sides of the vertical surface of the step.

[0008] Two mounting ports are provided on each vertical surface. The two mounting ports are arranged vertically, with the upper mounting port serving as a return port or a spare port, and the lower mounting port serving as a discharge port or a mixing port.

[0009] The pipe groove is a semi-circular groove that runs straight through the front and back.

[0010] The tank is provided with an overflow port, which is located at a predetermined distance below the top of the tank and is used to control the highest liquid level inside the tank.

[0011] The tank body has an inner groove on the rear side of the top, and the overflow port is located on the vertical groove wall of the inner groove.

[0012] The top of the tank is equipped with multiple lifting rings.

[0013] The pipe assembly includes an upper coil connected to the installation port, a lower coil located below the upper coil, and a vertical pipe connecting the upper and lower coils respectively. The plurality of liquid outlet holes are distributed on the upper coil and the lower coil.

[0014] Compared with existing technologies, this utility model mainly features a pipe groove on the top of the tank that matches the outer contour of the infusion pipe, and the infusion pipe is detachably snapped into the pipe groove, thereby better ensuring the stability of the infusion pipe structure. This not only avoids mechanical vibration and displacement of the infusion pipe during the infusion process, thus eliminating leakage accidents at the connection between the infusion pipe and the tank, but also avoids fluid resistance fluctuations caused by pipe torsion, and greatly facilitates pipe positioning during maintenance. Furthermore, a pipe assembly with multiple outlet holes is added inside the tank. The pipe assembly is connected to the installation port and communicates with the infusion pipe. The battery fluid is then fed into the pipe assembly through the infusion pipe and injected into the tank at a predetermined flow rate through the multiple outlet holes. Therefore, this injection method effectively reduces the infusion impact inside the tank, prevents the battery fluid deposited at the bottom of the tank from becoming turbulent and forming a vortex zone due to impact, ensures the uniformity of battery fluid mixing, and greatly extends the service life of the flow battery. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 for Figure 1 The left view.

[0017] Figure 3 for Figure 1 The right view.

[0018] Figure 4 for Figure 1 Top view.

[0019] Figure 5 for Figure 1 A three-dimensional image.

[0020] Figure 6 This is a schematic diagram of the interior of the tank (a half-section of the tank showing the piping assembly). Detailed Implementation

[0021] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0022] like Figures 1-6 As shown, 1. Tank body, 2. Inspection cover, 21. Interface, 3. Step, 4. Lifting ring, 5. Installation port, 6. Overflow port, 7. Pipe groove, 8. Inner groove, 9. Pipe assembly, 91. Upper coil, 92. Lower coil, 93. Vertical pipe, 10. Liquid outlet. The same labels in each figure represent the same components.

[0023] A flow battery energy storage tank, such as Figure 1 As shown, it is mainly used to store the battery fluid, or electrolyte, of flow batteries. It includes a tank 1 manufactured by rotational molding. The outer surface of the tank is provided with multiple reinforcing ribs or reinforcing grooves to ensure the structural strength of the tank.

[0024] The tank body 1 has a step 3 on the front side of its top, and mounting openings 5 ​​are provided on both sides of the vertical surface of the step. For example, in this embodiment... Figure 5 As shown, there are two mounting ports 5 on each vertical surface. The two mounting ports are arranged vertically, and the mounting port located above can be used as a return port or a spare port, while the mounting port located below can be used as a discharge port or a mixing port. The choice can be made according to the actual use needs.

[0025] Furthermore, depending on the installed capacity, multiple tanks can be connected in series or in parallel through mixing ports or return ports of the same level.

[0026] The tank body 1 has an inner groove 8 on the rear side of the top. The vertical groove wall of the inner groove has an overflow port 6. The height of the overflow port must be lower than a predetermined distance from the top of the tank body 1 and is used to control the highest liquid level in the tank body 1.

[0027] The tank body 1 is equipped with an inspection cover 2, a pipe groove 7, and a lifting ring 4 on its top. The inspection cover 2 is detachably connected to the inspection port on the top of the tank body 1 by screwing it on. The inspection cover 2 has multiple interfaces 21 for installing monitoring components. For example, in this embodiment… Figure 4 As shown, the inspection cover 2 has 6 circumferentially distributed interfaces, which can be used to install sensors or level gauges with different functions. In the traditional structure, the sensors or level gauges are installed on the side of the tank, which can easily damage the strength of the tank and cause leakage at the installation point. It also makes it very troublesome to repair or replace these monitoring components. However, this application only requires removing the inspection cover 2 on the top of the tank, which is obviously simpler and more convenient.

[0028] The aforementioned pipe grooves 7 are designed on both sides of the top of the tank. Each side of the pipe groove 7 is a semi-circular groove that runs straight through the front and back. It is mainly used to detachably snap the infusion tube (not shown in the figure) connected to the installation port 5 into the pipe groove 7. Therefore, the pipe groove needs to match the outer contour of the infusion tube, so that the size relationship can be used to achieve a tight fit.

[0029] The design of the pipe groove 7 can not only avoid mechanical vibration and displacement of the infusion pipe during the infusion process, thereby eliminating leakage accidents at the connection between the infusion pipe and the tank 1, but also avoid fluctuations in liquid flow resistance caused by pipe torsion, and greatly facilitate pipe positioning during maintenance.

[0030] Multiple lifting rings 4 are provided on the top of the tank 1. In this embodiment, they are distributed at the four corners of the top of the tank and are integrated with the tank body through rotational molding design to facilitate the lifting of the tank 1.

[0031] The tank 1 is equipped with a pipe assembly 9, which is connected to the installation port 5 and communicates with the infusion pipe. The pipe assembly 9 includes an upper coil 91 connected to the installation port 5, a lower coil 92 located below the upper coil, and a vertical pipe 93 that connects the upper and lower coils respectively. The pipe assembly 9 is provided with multiple liquid outlet holes 10, which are distributed on the upper coil 91 and the lower coil 92. When battery fluid is introduced into the pipe assembly 9 through the infusion pipe, it can be injected into the tank 1 through the multiple liquid outlet holes 10 at a predetermined flow rate distribution ratio.

[0032] Therefore, this injection method can effectively reduce the impact of liquid delivery in tank 1, prevent the battery fluid deposited at the bottom of the tank from becoming turbulent and forming a vortex zone due to impact, ensure the uniformity of battery fluid mixing, and greatly extend the service life of the flow battery.

[0033] The upper and lower coils can be connected by corrugated pipe bodies with elbows or multi-way pipe joints. The pipe characteristics of corrugated pipes can improve the connection accuracy between pipes during hot melting and also play a role in reducing vibration during liquid delivery.

[0034] The basic principles and main features of this utility model have been described above. Those skilled in the art should understand that this utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the utility model as claimed. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A flow battery energy storage tank, comprising a tank body (1) for storing battery fluid, an installation port (5) disposed on the tank body, and an inspection cover (2) disposed on the top of the tank body, and further comprising an infusion pipe externally connected to the installation port (5), characterized in that, The top of the tank (1) is provided with a pipe groove (7) that matches the outer contour of the infusion pipe, and the infusion pipe is detachably snapped into the pipe groove (7); The tank (1) is provided with a pipe assembly (9), which has multiple liquid outlet holes (10). The pipeline assembly (9) is connected to the installation port (5) and communicates with the infusion pipe. The infusion pipe inputs battery fluid into the pipeline assembly (9) and then injects it into the tank (1) through multiple outlet holes (10) at a predetermined flow rate distribution ratio.

2. The flow battery energy storage tank according to claim 1, characterized in that, The inspection cover (2) is provided with an interface (21) for installing monitoring components.

3. The flow battery energy storage tank according to claim 1, characterized in that, The tank body (1) has a step (3) on the front side of the top, and the vertical surface of the step has an installation port (5) on both sides.

4. The flow battery energy storage tank according to claim 3, characterized in that, Two mounting ports (5) are provided on each vertical surface. The two mounting ports are arranged vertically, with the upper mounting port serving as a return port or a spare port, and the lower mounting port serving as a discharge port or a mixing port.

5. A flow battery energy storage tank according to claim 1, characterized in that, The pipe groove (7) is a semi-circular groove that runs straight through the front and back.

6. A flow battery energy storage tank according to claim 1, characterized in that, The tank (1) is provided with an overflow port (6), the height of which is lower than a predetermined distance from the top of the tank (1), and is used to control the highest liquid level in the tank (1).

7. A flow battery energy storage tank according to claim 6, characterized in that, The tank body (1) has an inner groove (8) on the rear side of the top, and the overflow port (6) is located on the vertical groove wall of the inner groove (8).

8. A flow battery energy storage tank according to claim 1, characterized in that, The top of the tank (1) is provided with multiple lifting rings (4).

9. A flow battery energy storage tank according to claim 1, characterized in that, The pipe assembly (9) includes an upper coil (91) connected to the installation port (5), a lower coil (92) located below the upper coil, and a vertical pipe (93) connecting the upper and lower coils respectively. The plurality of liquid outlet holes (10) are distributed on the upper coil (91) and the lower coil (92).

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