Integrated storage tank for electrolyte of flow battery

Abstract

The utility model relates to the technical field of electrolyte storage equipment, and discloses a flow battery electrolyte integrated storage tank which comprises a container frame, an electrolyte storage tank is arranged in the container frame, a heat exchanger is arranged on the outer side of the electrolyte storage tank, a plurality of manholes are formed in the outer side of the electrolyte storage tank, and the manholes are communicated with the container frame. And a plurality of functional pipe openings are formed in the outer side of the electrolyte storage tank, and a stirrer penetrating into the electrolyte storage tank is arranged on one side of the electrolyte storage tank. According to the flow battery electrolyte integrated storage tank, uniform mixing of concentration and valence states of backflow electrolyte and stock solution in the storage tank and joint control of temperature control and a heat exchanger can be ensured through side stirring, so that a system can normally operate in an optimal temperature state, battery efficiency and electrochemical reaction are ensured, modular configuration is achieved, production and application of the system are effectively improved, and the production cost is reduced. And the requirement of the flow battery on the electrolyte storage tank is further met.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolyte storage equipment, in particular to an integrated electrolyte storage tank for a flow battery. Background Art

[0002] At present, as a new type of energy storage battery, all-vanadium liquid flow battery is one of the first choices for large-scale energy storage applications. All-vanadium liquid flow battery has attracted widespread attention in recent years due to its long service life, high safety performance, fast response speed and other characteristics, and has entered the stage of large-scale application.

[0003] An all-vanadium liquid flow battery is a battery that uses a circulating vanadium solution as an energy storage medium for both the positive and negative electrodes, and can be charged and discharged. The mutual conversion of electrical energy and chemical energy is achieved through charging and discharging, thereby achieving the storage and release of electrical energy. There are many types of electrolyte storage tanks. For example, an electrolyte storage tank and a liquid flow battery disclosed in Chinese patent CN106654314B include structures such as a water vapor collection component. The electrolyte storage tank can improve the reaction performance and low-temperature stability of the negative electrode electrolyte. However, most existing electrolyte storage tanks are single-body container tanks, which cannot effectively ensure the concentration and valence uniformity of the electrolyte during circulation and use, thereby affecting the stability of battery performance. In addition, the single-body storage tank has a low degree of integration and cannot be modularly operated during production and use, which restricts its use scenario. Therefore, an integrated liquid flow battery electrolyte storage tank is proposed to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides an integrated liquid flow battery electrolyte storage tank, which has the advantages of high integration and solves the problem that most traditional electrolyte storage tanks are single-body with low integration.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of high integration, the utility model provides the following technical solutions: an integrated liquid flow battery electrolyte storage tank, comprising a container frame, an electrolyte storage tank is arranged in the container frame, a heat exchanger is arranged on the outside of the electrolyte storage tank, a plurality of manholes are arranged on the outside of the electrolyte storage tank, a plurality of functional pipe openings are opened on the outside of the electrolyte storage tank, an agitator penetrating into the interior of the electrolyte storage tank is arranged on one side of the electrolyte storage tank, a plurality of circulating pumps are arranged on one side of the electrolyte storage tank, and a plurality of walkways are arranged on the top of the electrolyte storage tank.

[0008] Preferably, the electrolyte storage tank includes an electrolyte inlet, an electrolyte outlet and a pressure-bearing plastic pipe, the pressure-bearing plastic pipe is arranged on one side of the electrolyte storage tank, the electrolyte outlet and the electrolyte inlet are connected to the electrolyte storage tank through the pressure-bearing plastic pipe, and the circulation pump is arranged on one side of the pressure-bearing plastic pipe.

[0009] Preferably, a temperature sensor is provided on the electrolyte storage tank, and a breathing valve is provided on one side of the electrolyte storage tank.

[0010] Preferably, the electrolyte storage tank is a metal pressure-resistant tank body, and the electrolyte storage tank is lined with a high-adhesion modified PE layer.

[0011] Preferably, the high adhesion modified PE layer has a thickness of -mm.

[0012] Preferably, the electrolyte storage tank may be in a shape of at least one of a rectangle or a circle.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides an integrated electrolyte storage tank for a flow battery, which has the following beneficial effects:

[0015] The integrated electrolyte storage tank for the flow battery can ensure the uniform mixing of the reflux electrolyte and the original liquid in the storage tank in terms of concentration and valence through side stirring. The combined control of temperature control and heat exchanger enables the system to operate normally under the optimal temperature condition, ensuring battery efficiency and electrochemical reaction. The modular configuration effectively improves the production and application of the system, further meeting the demand of flow batteries for electrolyte storage tanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a top sectional view of the utility model;

[0018] Figure 3 It is a side sectional view of the utility model.

[0019] In the figure: 1. container frame; 2. electrolyte storage tank; 3. heat exchanger; 4. manhole; 5. functional pipe opening; 6. agitator; 7. circulation pump; 8. walkway. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3 A liquid flow battery electrolyte integrated storage tank comprises a container frame 1, an electrolyte storage tank 2 is arranged in the container frame 1, a heat exchanger 3 is arranged on the outside of the electrolyte storage tank 2, a plurality of manholes 4 are arranged on the outside of the electrolyte storage tank 2, a plurality of functional pipe openings 5 ​​are opened on the outside of the electrolyte storage tank 2, a stirrer 6 penetrating into the electrolyte storage tank 2 is arranged on one side of the electrolyte storage tank 2, a plurality of circulating pumps 7 are arranged on one side of the electrolyte storage tank 2, and a plurality of walkways 8 are arranged on the top of the electrolyte storage tank 2.

[0022] In this embodiment, by setting up multiple circulation pumps, switching between single-pump circulation and multi-pump transfer can be achieved, and a nitrogen sealing function port is provided on the top of the tank body. When in use, nitrogen is introduced into the tank body through the nitrogen sealing port to prevent air from entering the tank body. Since the electrolyte is charged, nitrogen sealing reduces safety hazards.

[0023] It should also be noted that in this embodiment, the walkway 8 is a fiberglass grid walkway, which is provided to facilitate system operation and maintenance and other work processes, and the electrolyte storage tank 2 is an integrated design with high reliability. The liquid flow battery energy storage medium is an electrolyte aqueous solution, which operates in a closed manner at room temperature and pressure, has no risk of fire and explosion, and has high system safety.

[0024] It should also be noted that the outer surface of the electrolyte storage tank 2 can be insulated with materials such as rock wool, aluminum plate, and fiberglass plate.

[0025] In the above embodiment, the agitator 6 provided on the integrated electrolyte storage tank is a side stirring system. The side stirring can solve the problem that the existing closed all-vanadium battery electrolyte storage tank is difficult to ensure the uniformity of the electrolyte during operation. The side stirring can be installed in the front, middle, rear and other parts of the storage tank as needed.

[0026] Among them, the electrolyte storage tank 2 includes an electrolyte inlet, an electrolyte outlet and a pressure-bearing plastic pipe. The pressure-bearing plastic pipe is arranged on one side of the electrolyte storage tank 2. The electrolyte outlet and the electrolyte inlet are connected to the electrolyte storage tank through the pressure-bearing plastic pipe. The circulation pump 7 is arranged on one side of the pressure-bearing plastic pipe.

[0027] In addition, a temperature sensor is provided on the electrolyte storage tank 2 , and a breathing valve is provided on one side of the electrolyte storage tank 2 .

[0028] It should be noted that the breathing valve is provided to ensure the balance of the electrolyte inlet and outlet pressures, and the temperature sensor is designed to monitor the electrolyte temperature in the electrolyte storage tank 2 in real time.

[0029] Among them, the electrolyte storage tank 2 is a metal pressure-resistant tank body, and the electrolyte storage tank 2 is lined with a high-adhesion modified PE layer.

[0030] It can be understood that the high-adhesion modified PE lining in this embodiment has good anti-corrosion properties, is insulated and non-conductive, is lightweight and has better bonding effect, and the lining plastic process anti-corrosion layer has a long service life of up to 20 years, which is comparable to the charge and discharge cycle life of the liquid flow battery.

[0031] In addition, the thickness of the high adhesion modified PE layer is 3-30 mm, and the thickness range of 5-15 mm is the best.

[0032] In addition, the shape of the electrolyte storage tank 2 can be at least one of a rectangle and a circle. In this embodiment, the shape design of the electrolyte storage tank 2 can ensure good stability and improve safety.

[0033] The working principle of this embodiment is as follows:

[0034] During the operation of the flow battery, the electrolytes of both the positive and negative electrodes need to flow out of the storage tank, flow into the battery stack, undergo electrochemical reactions, and then flow back into the storage tank from the reflux port on the top of the storage tank. By setting up a temperature sensor and a heat exchanger 3-link control configuration, circulating water can be used for cooling at high temperatures, and hot water can be used for heating at low temperatures, effectively reducing the impact of the system ambient temperature, so that the system can work normally at the optimal temperature state, ensuring battery efficiency and electrochemical reactions. In addition, during the operation of the flow battery, when charging is required, the external power supply device is introduced into the charging circuit The battery stack undergoes chemical reactions to store electrical energy in the electrolyte. During discharge, the electrolyte undergoes chemical reactions through the battery stack to release electrical energy, which is then provided to the load by the discharge circuit for use by the load. The modular all-vanadium liquid flow battery electrolyte system integrates the electrolyte storage tank 2, electrolyte, circulation pump 7, heat exchange system, connecting pipes, etc. into a single frame. On-site operation only requires simple connection with the battery stack pipes and cables, etc., and the system can operate normally. The system can be used in single or multiple sets, and is convenient to install, maintain, and operate, effectively reducing the overall system cost.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid flow battery electrolyte integrated storage tank, comprising a container frame (1), characterized in that: An electrolyte storage tank (2) is arranged inside the container frame (1), a heat exchanger (3) is arranged on the outside of the electrolyte storage tank (2), a plurality of manholes (4) are arranged on the outside of the electrolyte storage tank (2), a plurality of functional pipe openings (5) are opened on the outside of the electrolyte storage tank (2), a stirrer (6) penetrating into the electrolyte storage tank (2) is arranged on one side of the electrolyte storage tank (2), a plurality of circulation pumps (7) are arranged on one side of the electrolyte storage tank (2), and a plurality of walkways (8) are arranged on the top of the electrolyte storage tank (2).

2. The integrated electrolyte storage tank for a flow battery according to claim 1, characterized in that: The electrolyte storage tank (2) comprises an electrolyte inlet, an electrolyte outlet and a pressure-bearing plastic pipe, the pressure-bearing plastic pipe is arranged on one side of the electrolyte storage tank (2), the electrolyte outlet and the electrolyte inlet are connected to the electrolyte storage tank via the pressure-bearing plastic pipe, and the circulation pump (7) is arranged on one side of the pressure-bearing plastic pipe.

3. The integrated electrolyte storage tank for a flow battery according to claim 1, characterized in that: A temperature sensor is provided on the electrolyte storage tank (2), and a breathing valve is provided on one side of the electrolyte storage tank (2).

4. The integrated electrolyte storage tank for a flow battery according to claim 1, characterized in that: The electrolyte storage tank (2) is a metal pressure-resistant tank body, and the electrolyte storage tank (2) is lined with a high-adhesion modified PE layer.

5. The integrated electrolyte storage tank for a flow battery according to claim 4, characterized in that: The thickness of the high-adhesion modified PE layer is 3-30 mm.

6. The integrated electrolyte storage tank for a flow battery according to claim 1, characterized in that: The shape of the electrolyte storage tank (2) can be at least one of a rectangle and a circle.

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