Direct air cooling system applied to electrolyte

Abstract

The utility model belongs to the field of all-vanadium redox flow battery systems, and discloses an air direct cooling system applied to electrolyte. Comprising an open cooling system and a closed cooling system. Air is used as a cooling medium, and the electrolyte is directly cooled by the air flowing through the storage tank.

Description

Technical Field

[0001] The utility model belongs to the field of all-vanadium liquid flow battery systems, and in particular relates to an air direct cooling system applied to electrolyte. Background Art

[0002] In traditional all-vanadium liquid flow battery systems, the thermal management of the electrolyte is mostly in the form of a compressor refrigeration system (compressor, shell and tube heat exchanger, condenser, throttling component). The shell and tube heat exchanger is used to cool the electrolyte. The shell and tube heat exchanger is part of the electrolyte circulation flow path. The electrolyte passes through the shell and tube heat exchanger with Freon as the refrigerant to absorb the heat of the electrolyte. The heat is brought to the condenser through the action of the compressor and dissipated into the air. That is, the refrigeration is carried out based on the principle that the liquid refrigerant absorbs heat by vaporization and the steam condenses and releases heat. The entire cycle is at the expense of the energy consumption of the compressor system.

[0003] Existing compressor systems consume a lot of energy, increasing the flow battery system's own electricity consumption and reducing the battery system's energy efficiency. Shell-and-tube heat exchangers have special material requirements, resulting in high replacement costs and difficulty in maintenance. Furthermore, as part of the electrolyte circulation system, shell-and-tube heat exchangers can pose a risk of electrolyte leakage. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an air direct cooling system for electrolyte, which uses air as a cooling medium and the electrolyte is directly cooled by the air flowing through the storage tank.

[0005] The above-mentioned object of the utility model is achieved through the following technical solutions: an air direct cooling system applied to electrolyte, comprising an open cooling system and a closed cooling system;

[0006] The open cooling system specifically includes an external container a, and the electrolyte storage tank is located in the external container a. The electrolyte storage tank is divided into a positive electrolyte storage tank a and a negative electrolyte storage tank a arranged in parallel. The positive electrolyte storage tank a and the negative electrolyte storage tank a are respectively connected to the battery stack a in a loop. An air inlet is provided on the side of the positive electrolyte storage tank a and the negative electrolyte storage tank a corresponding to the position of the external container a, and an air outlet is provided on the bottom of the positive electrolyte storage tank a and the negative electrolyte storage tank a corresponding to the position of the external container a.

[0007] The closed cooling system specifically includes an external container b. The electrolyte storage tank is located in the external container b. The electrolyte storage tank is divided into a positive electrolyte storage tank b and a negative electrolyte storage tank b arranged in parallel. The positive electrolyte storage tank b and the negative electrolyte storage tank b are respectively connected to the battery stack b in a cycle. An air conditioner is provided in the external container b above the positive electrolyte storage tank b and the negative electrolyte storage tank b.

[0008] Furthermore, an air direct cooling fan a is provided at the air outlet of the open cooling system.

[0009] Furthermore, air direct cooling fans b are provided below both sides of the positive electrolyte storage tank b and the negative electrolyte storage tank b of the closed cooling system.

[0010] Furthermore, the outer surfaces of the positive electrolyte storage tank a and the negative electrolyte storage tank a are designed to be in the shape of grooved air ducts.

[0011] Furthermore, the outer surfaces of the positive electrolyte storage tank b and the negative electrolyte storage tank b are designed to be in the shape of grooved air ducts.

[0012] The air direct cooling fan a is located at the air duct outlet. The fan forces outdoor air to flow through the electrolyte storage tank heat dissipation duct through the air inlet. The outer surface of the electrolyte storage tank is designed as a grooved duct shape to increase the heat dissipation area, thereby accelerating the transfer and dissipation of electrolyte heat.

[0013] The air direct cooling fan b is located on both sides of the electrolyte storage tank and forms a circulating air duct with the air conditioner. The fan forces the air in the container to circulate along the electrolyte storage tank heat dissipation duct. The outer surface of the electrolyte storage tank is designed as a grooved air duct shape to increase the heat dissipation area, thereby accelerating the transfer and dissipation of electrolyte heat.

[0014] The beneficial effects of the present invention compared with the prior art are:

[0015] 1. Compared with the compressor refrigeration system, under the condition of the same cooling capacity demand, the fan power consumption of the open cooling system is about 15% of that of the compressor refrigeration system.

[0016] 2. This solution does not require additional heat exchange equipment in the electrolyte circulation flow path, saving production costs, reducing the risk of electrolyte leakage, and improving product production efficiency.

[0017] 3. Product integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of an open cooling system of an air direct cooling system for electrolytes according to the utility model;

[0020] Figure 2 The utility model is a schematic structural diagram of a closed cooling system of an air direct cooling system applied to electrolyte.

[0021] In the figure, 11. Battery stack a; 12. Battery stack b; 21. Positive electrolyte tank a; 22. Positive electrolyte tank b; 31. Negative electrolyte tank a; 32. Negative electrolyte tank b; 41. External container a; 42. External container b; 51. Direct air cooling fan a; 52. Direct air cooling fan b; 6. Air inlet; 7. Air outlet; 8. Air conditioner. DETAILED DESCRIPTION

[0022] The present invention is described in detail below by means of specific examples, but the scope of protection of the present invention is not limited. Unless otherwise specified, the experimental methods used in the present invention are conventional methods, and the experimental equipment, materials, reagents, etc. used can be obtained from commercial channels.

[0023] Example 1

[0024] An air direct cooling system for electrolyte, including an open cooling system and a closed cooling system;

[0025] Open cooling system, such as Figure 1 As shown: The container is equipped with air inlets and outlets. The electrolyte storage tank is located inside the container. The air inlets and outlets of the container are the air inlets and outlets of the electrolyte storage tank air duct. The air direct cooling fan is located at the air duct outlet. The fan forces outdoor air to flow through the electrolyte storage tank heat dissipation duct through the air inlet. The outer surface of the electrolyte storage tank is designed as a grooved air duct shape to increase the heat dissipation area, thereby accelerating the transfer and dissipation of electrolyte heat.

[0026] Closed cooling system, such as Figure 2 As shown: The container is closed, the electrolyte storage tank is inside the container, and an air conditioner is installed inside the container to adjust the ambient air temperature inside the container; the air direct cooling fan is located at the air outlet of the electrolyte storage tank air duct. The fan forces the air in the container to circulate along the electrolyte storage tank heat dissipation duct. The outer surface of the electrolyte storage tank is designed as a grooved air duct shape to increase the heat dissipation area, thereby accelerating the transfer and dissipation of electrolyte heat.

[0027] The actual ambient temperature is between 22 and 27°C. The following results are obtained from equipment test data of the direct air cooling system and the compressor refrigeration system:

[0028] 1. The open cooling system consumes less power, and the closed cooling system consumes slightly less power.

[0029] a. The power consumption of the compressor refrigerator is about 2300W

[0030] b. The power consumption of the open cooling system is about 350W

[0031] c. The power consumption of the closed cooling system is about 2200W

[0032] 2. Product costs are reduced and production efficiency is increased.

[0033] a. Compressor refrigeration system: The electrolyte flows through the shell and tube heat exchanger, which is made of corrosion-resistant metal and plastic and has a high cost.

[0034] b. Direct air cooling system: There is no additional heat exchange equipment in the electrolyte flow path, which saves the cost of shell and tube heat exchangers and improves product production efficiency.

[0035] 3. Air direct cooling system does not require additional on-site construction

[0036] a. Compressor refrigeration system: The compressor unit is an independent entity and is installed outside the battery body. It is necessary to construct the fluorine side pipeline with the shell and tube heat exchanger on site and flush the refrigerant, which consumes a lot of time and money.

[0037] b. Direct air cooling system: This system is integrated with the battery body and can be put into use directly without additional construction.

[0038] The above-described embodiments are only preferred embodiments of the present invention, and are not intended to be all feasible embodiments of the present invention. For those skilled in the art, any obvious modifications made thereto without departing from the principles and spirit of the present invention should be considered to be within the scope of protection of the claims of the present invention.

Claims

1. An air direct cooling system for electrolyte, characterized in that: Including open cooling system and closed cooling system; The open cooling system specifically includes an external container a (41), an electrolyte storage tank is located in the external container a (41), and the electrolyte storage tank is divided into a positive electrolyte storage tank a (21) and a negative electrolyte storage tank a (31) arranged in parallel. The positive electrolyte storage tank a (21) and the negative electrolyte storage tank a (31) are respectively connected to the battery stack a (11) in a loop. An air inlet (6) is provided on the side of the positive electrolyte storage tank a (21) and the negative electrolyte storage tank a (31) at a position corresponding to the external container a (41), and an air outlet (7) is provided on the bottom of the positive electrolyte storage tank a (21) and the negative electrolyte storage tank a (31) at a position corresponding to the external container a (41); The closed cooling system specifically includes an external container b (42), an electrolyte storage tank is located in the external container b (42), and the electrolyte storage tank is divided into a positive electrolyte storage tank b (22) and a negative electrolyte storage tank b (32) arranged in parallel. The positive electrolyte storage tank b (22) and the negative electrolyte storage tank b (32) are respectively connected to the battery stack b (12) in a loop. An air conditioner (8) is provided in the external container b (42) above the positive electrolyte storage tank b (22) and the negative electrolyte storage tank b (32).

2. The air direct cooling system for electrolyte according to claim 1, characterized in that: An air direct cooling fan a (51) is provided at the air outlet (7) of the open cooling system.

3. The air direct cooling system for electrolyte according to claim 1, characterized in that: Air direct cooling fans b (52) are provided below both sides of the positive electrolyte storage tank b (22) and the negative electrolyte storage tank b (32) of the closed cooling system.

4. The air direct cooling system for electrolyte according to claim 1, characterized in that: The outer surfaces of the positive electrolyte storage tank a (21) and the negative electrolyte storage tank a (31) are designed to be in the shape of a grooved air duct.

5. The air direct cooling system for electrolyte according to claim 1, characterized in that: The outer surfaces of the positive electrolyte storage tank b (22) and the negative electrolyte storage tank b (32) are designed to be in the shape of a grooved air duct.

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