A leakage protection device for a vanadium redox flow battery

Abstract

The utility model relates to the technical field of liquid flow battery, specifically disclose a kind of for all-vanadium liquid flow battery's leakage protection full-time, it include: battery body and protective shell.The protective shell includes shell, deflector and liquid-accumulating pipe, the shell is sleeved in the outside of battery body, deflector is provided with multiple from top to bottom, the side of deflector is contacted with battery body, other side is connected on shell, deflector is inclined downward from battery body to shell setting, shell is equipped with flow guide hole, flow guide hole is located above the side of deflector and shell contact, flow guide hole is communicated with liquid-accumulating pipe, and ventilation device is communicated on liquid-accumulating pipe;The deflector of the utility model can quickly guide leaked electrolyte away from the outer wall of battery, lead to liquid-accumulating pipe centralized collection, while ventilation device can timely discharge harmful gas, effectively solve the problem of leakage corrosion battery body and produce security risk.

Description

Technical Field

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

[0002] Vanadium redox batteries are redox batteries that use vanadium as the active material in a circulating liquid state. They are characterized by good charge and discharge performance, deep discharge capability without damage to the battery, and the fact that most battery components are made of inexpensive carbon materials and engineering plastics. When vanadium redox batteries leak due to various reasons during use, they are currently mostly protected by the outer casing to prevent leakage. However, this can cause the leaked liquid to accumulate inside the casing, come into contact with the battery, and corrode it, affecting the battery's lifespan.

[0003] Chinese patent document CN219350281U discloses a leakage protection device for a vanadium redox flow battery, comprising a foundation and an energy storage device mounted on the foundation. The energy storage device includes a housing and a vanadium redox flow battery mounted within the housing. The vanadium redox flow battery includes a horizontally arranged positive electrode storage tank, a negative electrode storage tank, and a power component. The housing also has leakage receiving grooves corresponding to the positive electrode storage tank, the negative electrode storage tank, and the power component. The foundation contains a protective structure module, which includes a liquid accumulation tank, a drain pipe, and a solenoid valve. Each liquid accumulation tank is connected upwards to the bottom of the corresponding leakage receiving groove through a drain pipe. Each drain pipe is equipped with a corresponding solenoid valve. A leakage sensor is also provided at the bottom of the leakage receiving groove to prevent liquid overflow in the event of a large leakage and to solve the problem of continuous corrosion damage to the battery device or the external environment caused by leaked liquid.

[0004] In the above technical solution, although the spread of battery leakage is prevented by setting up a liquid collection tank, a drain pipe and a solenoid valve, when the battery leaks, the leakage will flow down the outer wall of the battery, causing corrosion of the outer wall. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a leakage protection device for vanadium redox flow batteries, aiming to solve the problem that battery leakage will cause corrosion of the battery outer wall in related technologies.

[0006] To solve the aforementioned technical problem, the present invention adopts the following technical solution: a leakage protection device for a vanadium redox flow battery, comprising a battery body and a protective shell. The protective shell includes an outer shell, a flow guide plate, and a liquid collection pipe. The outer shell is fitted over the battery body. Multiple flow guide plates are arranged from top to bottom along the height direction of the battery body. One side of the flow guide plate contacts the battery body, and the other side is connected to the outer shell. The flow guide plate is inclined downward from the battery body towards the outer shell. A flow guide hole is provided on the outer shell, located above the contact position between the flow guide plate and the outer shell. The flow guide hole communicates with the liquid collection pipe, and a ventilation device is connected to the liquid collection pipe.

[0007] Its effects are as follows: By setting up multiple layers of inclined guide plates, when a leak occurs at any height within the battery body, the electrolyte can be immediately guided away from the outer wall of the battery and directed to the guide holes on the casing, ultimately flowing into the collection pipe. This fundamentally avoids the corrosion problem caused by the electrolyte flowing down the outer wall of the battery. The ventilation device can promptly expel corrosive gases generated during a leak, further protecting the equipment safety.

[0008] Preferably, the outer shell is made of a corrosion-resistant material; the effect is that even if liquid splashes, the outer shell itself will not be corroded, thus extending the service life of the entire protective structure.

[0009] Preferably, a storage tank is provided at the bottom of the collection pipe; its effect is to collect and temporarily store the leaked electrolyte, which is convenient for subsequent treatment and recycling.

[0010] Preferably, a sealant is applied between the guide plate and the battery body; the effect of this is to ensure that leaked liquid cannot seep downwards from the contact gap between the guide plate and the battery body, but must flow towards the outer casing along the inclined surface of the guide plate, resulting in better flow guidance.

[0011] Preferably, the ventilation device is a negative pressure fan and a positive pressure fan, and the liquid collection pipe is provided on both the left and right sides; its effect is that by drawing air from one side and supplying air from the other side, a directional airflow can be formed in the shell, forcibly expelling harmful gases and preventing gas accumulation.

[0012] Preferably, a sealed chamber is formed between the battery body, the outer casing, and the two adjacent upper and lower guide plates; the effect is that the leakage can be limited to the local area where it occurs, making it easier to locate the leak point and prevent it from spreading.

[0013] Preferably, an alarm device is installed at the bottom of the liquid collection pipe; its effect is that it can monitor the occurrence of leakage in real time and issue an alarm to remind staff to deal with it in a timely manner.

[0014] Preferably, the angle between the guide plate and the horizontal plane is 30° to 45°; the effect is that this angle ensures that the liquid flows smoothly under the action of gravity and leaves no residue.

[0015] Preferably, the sealant is an acid-resistant silicone sealant; its advantage is that it can resist the corrosion of electrolyte and maintain long-term sealing performance.

[0016] Preferably, the alarm device is a float-type liquid level switch; its advantages are: simple structure, high reliability, and good corrosion resistance.

[0017] By adopting the above technical solution, the beneficial effects of this utility model are as follows: The multi-layered baffle design completely eliminates the problem of leakage corroding the battery's outer wall, significantly extending the battery's lifespan. It enables centralized collection of leaked liquid and active removal of harmful gases, improving system safety. The sealed chamber design facilitates rapid leak location and convenient maintenance. An alarm device provides early warning of leaks, preventing accidents from escalating. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0020] Reference numerals: 1. Battery body; 2. Outer casing; 3. Guide plate; 4. Guide hole; 5. Liquid collection pipe; 51. Storage tank; 6. Negative pressure fan; 7. Positive pressure fan; 8. Alarm device; 9. Sealant; 10. Sealed chamber; 11. Conduit. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1 The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] like Figures 1 to 2 As shown, a leakage protection device for a vanadium redox flow battery is provided. The battery body 1 is placed inside a shell 2 made of corrosion-resistant polypropylene sheet. Multiple guide plates 3 are arranged at intervals from top to bottom between the battery body 1 and the shell 2. The upper end of each guide plate 3 is bonded to the outer wall of the battery body 1 with acid-resistant silicone sealant 9 to form a seal, and the lower end is fixed to the inner wall of the shell 2 by welding or bolting. All guide plates 3 are inclined downward from the battery body towards the shell, with an angle between 30° and 45° with the horizontal plane.

[0024] On the left side wall of the outer casing 2, above each connection point of the guide plate 3, a guide hole 4 is provided. Two liquid collection pipes 5 are vertically arranged on the left and right outer walls of the outer casing 2, and are connected to all the guide holes 4 on the same side through conduits 11. A storage tank 51 is provided at the bottom of the liquid collection pipe 5 for collecting leakage. A negative pressure fan 6 is connected to the middle of the left liquid collection pipe 5, and a positive pressure fan 7 is connected to the middle of the right liquid collection pipe 5. A float-type liquid level switch is installed in the storage tank 51 at the bottom of the left liquid collection pipe 5 as an alarm device 8.

[0025] The two adjacent guide plates 3, the outer wall of the battery body 1, and the inner wall of the outer shell 2 together form a relatively independent sealed chamber 10.

[0026] The working principle of this invention is as follows: When electrolyte leakage occurs at a certain point in the battery body 1, the leaked liquid will drip or flow onto the guide plate 3 below it. Due to the inclined design of the guide plate 3 and its seal with the outer wall of the battery, the liquid will flow to the inner wall of the outer casing 2 on the left side, and enter the liquid collection pipe 5 on the left side through the upper guide hole 4, eventually collecting in the storage tank 51. When the liquid level in the storage tank 51 rises to a certain height, it will trigger the alarm device 8 and issue a leakage signal. At the same time, the negative pressure fan 6 and the positive pressure fan 7 are activated to form an air circulation from left to right inside the casing, promptly expelling any harmful gases such as vanadium electrolyte vapor that may be generated, and maintaining a safe gaseous environment inside the casing.

[0027] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A leakage protection device for a vanadium redox flow battery, comprising a battery body and a protective casing, characterized in that: The protective housing includes an outer shell, a flow guide plate, and a liquid collection pipe. The outer shell is fitted onto the outside of the battery body. Multiple flow guide plates are arranged from top to bottom along the height direction of the battery body. One side of the flow guide plate contacts the battery body, and the other side is connected to the outer shell. The flow guide plate is inclined downward from the battery body towards the outer shell. A flow guide hole is opened on the outer shell. The flow guide hole is located above the contact position between the flow guide plate and the outer shell. The flow guide hole is connected to the liquid collection pipe, and a ventilation device is connected to the liquid collection pipe.

2. The leakage protection device for a vanadium redox flow battery according to claim 1, characterized in that: The bottom of the collection tube is equipped with a storage tank. After the battery leaks, the liquid flows into the collection tube through the guide plate and guide hole.

3. The leakage protection device for a vanadium redox flow battery according to claim 1, characterized in that: The ventilation device consists of a negative pressure fan and a positive pressure fan. There are two liquid collection pipes, one on the left and one on the right, which are respectively connected to the left and right sides of the outer casing. The negative pressure fan is connected to the middle of the liquid collection pipe on the left, and the positive pressure fan is connected to the middle of the liquid collection pipe on the right.

4. The leakage protection device for a vanadium redox flow battery according to claim 1, characterized in that: Sealant is applied between the flow guide plate and the battery body.

5. The leakage protection device for a vanadium redox flow battery according to claim 1, characterized in that: A sealed chamber is formed between the battery body, the outer casing, and the two adjacent upper and lower guide plates.

6. The leakage protection device for a vanadium redox flow battery according to claim 1, characterized in that: An alarm device is installed at the bottom of the collection pipe.

7. The leakage protection device for a vanadium redox flow battery according to claim 1, characterized in that: The outer shell is made of corrosion-resistant material.

8. The leakage protection device for a vanadium redox flow battery according to claim 1, characterized in that: The angle between the guide plate and the horizontal plane is 30° to 45°.

9. The leakage protection device for a vanadium redox flow battery according to claim 6, characterized in that: The alarm device is a float-type liquid level switch.

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