Conveying system for new energy lithium battery electrolyte

Abstract

The utility model provides a conveying system for new energy lithium battery electrolyte. Comprising an electrolyte finished product barrel, an electrolyte filling pump, a first pressure supply tank filling control valve, a second pressure supply tank filling control valve, a first pressure supply tank, a second pressure supply tank, a first pressure supply tank supply control valve, a second pressure supply tank supply control valve, an electrolyte cooler, a cold water conveying pump, a supply filter, an electrolyte filling machine and a cooling water pipe, an electrolyte delivery pipe, a nitrogen supply valve, a nitrogen pressure regulating valve and a pure nitrogen supply pipe; the system uses an electrolyte filling pump set and a pipeline, an electrolyte conveying pressure tank, a filter, an electrolyte cold water cooling pump set, a heat exchanger and a pipeline, and nitrogen pressure supply; the device is reasonable in structure, heat energy is increased and conveyed, loss is small, it can be ensured that volatilization and oxidation do not occur in the electrolyte conveying process, temperature rise of the electrolyte is strictly controlled in the presence of the cold tracing pipe, conveying quality is improved, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to a lithium battery electrolyte delivery system, which is intended to achieve the purpose of reducing the electrolyte temperature rise, stabilizing the quality of the delivery medium, preventing the electrolyte from gasifying, and increasing the service life of the equipment. Background Art

[0002] The electrolyte delivery system is a delivery system that transports electrolyte from the storage area to the injection equipment to meet the actual production needs of lithium batteries.

[0003] The electrolyte used in lithium battery production is flammable, volatile, and has a low flash point. Exposure to air releases hazardous hydrofluoric acid. Furthermore, the temperature of the lithium battery electrolyte must not exceed 10°C before injection into the battery pack. Because the electrolyte is a Class I substance, it cannot be stored in large quantities in the workshop. During production, it is supplied by pumping. Due to the ambient temperature rise in the production workshop and the heat generated by fluid viscosity, the electrolyte temperature inevitably rises during transportation. Ensuring the quality of the electrolyte while ensuring stable and safe delivery from the supply source to the injection system remains an unresolved issue. Utility Model Content

[0004] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a delivery system for new energy lithium battery electrolyte; it reduces the electrolyte temperature rise, stabilizes the quality of the delivery medium, does not cause electrolyte gasification, and increases the service life of the equipment.

[0005] The present utility model is realized as follows. A conveying system for the electrolyte of new energy lithium batteries is constructed, characterized in that: the system includes an electrolyte finished product barrel (1), an electrolyte perfusion pump (2), a perfusion control valve for the first pressure supply tank (3), a perfusion control valve for the second pressure supply tank (4), a first pressure supply tank (5), a second pressure supply tank (6), a supply control valve for the first pressure supply tank (7), a supply control valve for the second pressure supply tank (8), an electrolyte cooler (9), a cold water conveying pump (10), a supply filter (11), a liquid injection machine (12), a cooling water pipe (13), an electrolyte conveying pipe (14), a pure nitrogen supply pipe (15), a first nitrogen supply valve (16), a second nitrogen supply valve (17), and a controllable pressure reducing valve group (pressure regulating valve) (18); the electrolyte finished product barrel (1) is communicated with the first pressure supply tank (5) and the second pressure supply tank (6) through an output pipeline, an electrolyte perfusion pump (2) is arranged on the output pipeline of the electrolyte finished product barrel (1), and the electrolyte in the electrolyte finished product barrel (1) is fed into the first pressure supply tank (5) and the second pressure supply tank (6) via the electrolyte perfusion pump (2). A perfusion control valve for the first pressure supply tank (3) and a perfusion control valve for the second pressure supply tank (4) are arranged at the inlet ends of the first pressure supply tank (5) and the second pressure supply tank (6); after the liquid level sensor of the supply tank reaches the high level, the valve of the corresponding supply tank perfusion control valve is closed. Supply control valves for the first pressure supply tank (7) and the second pressure supply tank (8) are arranged at the output ends of the first pressure supply tank (5) and the second pressure supply tank (6), and are communicated with the liquid injection machine (12) through the supply filter (11).

[0006] According to the conveying system for the electrolyte of new energy lithium batteries described in the present utility model, it is characterized in that: first nitrogen supply valves (16) and second nitrogen supply valves (17) are arranged on the corresponding pipelines of the first pressure supply tank (5) and the second pressure supply tank (6) respectively and the pure nitrogen supply pipe (15), and a controllable pressure reducing valve group (pressure regulating valve) (18) is arranged on the pure nitrogen supply pipe (15).

[0007] According to the conveying system for the electrolyte of new energy lithium batteries described in the present utility model, it is characterized in that: the supply tank body and the supply pipeline are provided with a cooling water tracing unit, and the cooling water tracing unit includes an electrolyte cooler (9), a cold water conveying pump (10), and a cooling water pipe (13).

[0008] The beneficial effects of the present utility model are as follows: The structure of the present utility model is reasonable, so that the heat energy for perfusion and conveying has small loss. The presence of the tracing pipe strictly controls the temperature rise of the electrolyte, improves the conveying quality, and prolongs the service life of the equipment. The advantages of the present utility model are reflected in;

[0009] 1. Prevent oxidation reaction: The electrolyte used in lithium battery production is flammable, volatile, with a low flash point, and will volatilize harmful hydrofluoric acid when exposed to air. Nitrogen is usually used as an inert gas to replace the oxygen in the air. Using nitrogen pressure supply can ensure that there is no volatilization and oxidation during the electrolyte transportation process, thus preventing the occurrence of oxidation reactions and ensuring the stability of the battery's positive electrode material.

[0010] 2. Control the transportation temperature: Using pipe tracing cooling can ensure that the maximum temperature during transportation is controlled within 10 degrees Celsius. This makes the heat energy increase and loss during perfusion and transportation small. The presence of the tracing cooling pipe strictly controls the temperature rise of the electrolyte, improves the transportation quality, and extends the service life of the equipment. Brief Description of the Drawings

[0011] Figure 1 is the system block diagram of the present utility model.

[0012] Wherein: 1. Finished electrolyte barrel, 2. Electrolyte perfusion pump, 3. Perfusion control valve of the first pressure supply tank, 4. Perfusion control valve of the second pressure supply tank, 5. First pressure supply tank, 6. Second pressure supply tank, 7. Supply control valve of the first pressure supply tank, 8. Supply control valve of the second pressure supply tank, 9. Electrolyte cooler, 10. Cold water delivery pump, 11. Supply filter, 12. Liquid injection machine, 13. Cooling water pipe, 14. Electrolyte delivery pipe, 15. Pure nitrogen supply pipe, 16. First nitrogen supply valve, 17. Second nitrogen supply valve, 18. Controllable pressure reducing valve group (pressure regulating valve). Detailed Embodiment

[0013] The following will combine the attached Figure 1 to describe the present utility model in detail. The technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0014] The present utility model hereby provides a transportation system for the electrolyte of new energy lithium batteries, such as Figure 1As shown in the figure, it can be implemented in the following manner; the system includes an electrolyte finished product barrel 1, an electrolyte perfusion pump 2, a perfusion control valve 3 for the A pressure supply tank, a perfusion control valve 4 for the B pressure supply tank, an A pressure supply tank 5, a B pressure supply tank 6, a supply control valve 7 for the A pressure supply tank, a supply control valve 8 for the B pressure supply tank, an electrolyte cooler 9, a cold water delivery pump 10, a supply filter 11, a liquid injection machine 12, a cooling water pipe 13, an electrolyte delivery pipe 14, a pure nitrogen supply pipe 15, an A nitrogen supply valve 16, a B nitrogen supply valve 17, and a controllable pressure reducing valve group (pressure regulating valve) 18; the electrolyte finished product barrel 1 is connected to the A pressure supply tank 5 and the B pressure supply tank 6 through an output pipeline, and an electrolyte perfusion pump 2 is arranged on the output pipeline of the electrolyte finished product barrel 1. The electrolyte in the electrolyte finished product barrel 1 is sent into the A pressure supply tank 5 and the B pressure supply tank 6 through the electrolyte perfusion pump 2. The perfusion control valve 3 for the A pressure supply tank and the perfusion control valve 4 for the B pressure supply tank are arranged at the inlet ends of the A pressure supply tank 5 and the B pressure supply tank 6; after the liquid level sensor of the supply tank reaches the high level, the valve of the corresponding supply tank perfusion control valve is closed. The supply control valve 7 for the A pressure supply tank and the supply control valve 8 for the B pressure supply tank are arranged at the output ends of the A pressure supply tank 5 and the B pressure supply tank 6, and are connected to the liquid injection machine 12 through the supply filter 11.

[0015] When implementing the conveying system for the electrolyte of a new energy lithium battery described in the present utility model: the A nitrogen supply valve 16 and the B nitrogen supply valve 17 are arranged on the corresponding pipelines of the A pressure supply tank 5 and the B pressure supply tank 6 respectively, and the controllable pressure reducing valve group (pressure regulating valve) 18 is arranged on the pure nitrogen supply pipe 15.

[0016] When implementing the conveying system for the electrolyte of a new energy lithium battery described in the present utility model: the supply tank body and the supply pipeline are provided with a cooling water tracing unit, and the cooling water tracing unit includes an electrolyte cooler 9, a cold water delivery pump 10, and a cooling water pipe 13.

[0017] The finished electrolyte in barrel 1 is sent into the empty tank among the pressure supply tanks A and B via the electrolyte filling pump 2. After the liquid level sensor of the supply tank reaches the high level, close the filling control valve of the corresponding supply tank and open the corresponding nitrogen supply valve. At the same time, open the supply control valve of the corresponding supply tank. The nitrogen supply is equipped with a pressure regulating valve 18, which can control the supply nitrogen pressure and correspondingly control the liquid supply rate. When reaching the lowest liquid level point, close the nitrogen supply valve 16 of tank A, the nitrogen supply valve 17 of tank B, the supply control valve 7 of the pressure supply tank A, and the supply control valve 8 of the pressure supply tank B to complete the liquid supply. After the supply is completed, use nitrogen to purge the residual raw material liquid in the pressure supply tanks 5 and 6 and then discharge it. The supply tanks A and B are supplied cyclically according to the above steps. The supply tank body and the supply pipeline are provided with cooling water tracing. Through the flow rate and temperature control of the cooling water pump 10, control the outlet temperature of the electrolyte supply tank at 5 °C, and the temperature at the end liquid filling machine is not higher than 7 °C. Using nitrogen pressure supply can ensure that there is no volatilization and oxidation during the electrolyte transportation process, and using pipeline tracing can ensure that the highest temperature during the transportation process is controlled within 10 °C.

[0018] The beneficial technical effects after the above improvement of this patent are as follows:

[0019] First, prevent oxidation reaction: The electrolyte used in lithium battery production is flammable, volatile, and has a low flash point. When exposed to air, it will volatilize harmful hydrogen fluoride. Nitrogen is usually used as an inert gas to replace oxygen in the air. Using nitrogen pressure supply can ensure that there is no volatilization and oxidation during the electrolyte transportation process, thus preventing the occurrence of oxidation reaction and ensuring the stability of the battery cathode material.

[0020] Second, control the transportation temperature: Using pipeline tracing can ensure that the highest temperature during the transportation process is controlled within 10 °C. This makes the heat energy increase and loss during filling and transportation small. The presence of the tracing pipe strictly controls the temperature rise of the electrolyte, improves the transportation quality, and extends the service life of the equipment.

[0021] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A conveying system for the electrolyte of a new energy lithium battery, characterized in that: The system includes an electrolyte finished product barrel (1), an electrolyte perfusion pump (2), a perfusion control valve for the first pressure supply tank (3), a perfusion control valve for the second pressure supply tank (4), the first pressure supply tank (5), the second pressure supply tank (6), a supply control valve for the first pressure supply tank (7), a supply control valve for the second pressure supply tank (8), an electrolyte cooler (9), a cold water delivery pump (10), a supply filter (11), a liquid injection machine (12), a cooling water pipe (13), an electrolyte delivery pipe (14), a pure nitrogen supply pipe (15), a first nitrogen supply valve (16), a second nitrogen supply valve (17), and a controllable pressure reducing valve group (18); the electrolyte finished product barrel (1) is communicated with the first pressure supply tank (5) and the second pressure supply tank (6) through an output pipeline, an electrolyte perfusion pump (2) is arranged on the output pipeline of the electrolyte finished product barrel (1), the electrolyte finished product barrel (1) is sent into the first pressure supply tank (5) and the second pressure supply tank (6) via the electrolyte perfusion pump (2), and a perfusion control valve for the first pressure supply tank (3) and a perfusion control valve for the second pressure supply tank (4) are arranged at the inlet ends of the first pressure supply tank (5) and the second pressure supply tank (6); after the liquid level sensor of the supply tank reaches the high level, the valve of the corresponding supply tank perfusion control valve is closed, supply control valves for the first pressure supply tank (7) and the second pressure supply tank (8) are arranged at the output ends of the first pressure supply tank (5) and the second pressure supply tank (6), and are communicated with the liquid injection machine (12) through the supply filter (11).

2. The conveying system for the electrolyte of a new energy lithium battery according to claim 1, wherein: First nitrogen supply valves (16) and second nitrogen supply valves (17) are arranged on the corresponding pipelines of the first pressure supply tank (5) and the second pressure supply tank (6) respectively and the pure nitrogen supply pipe (15), and a controllable pressure reducing valve group (18) is arranged on the pure nitrogen supply pipe (15).

3. The conveying system for the electrolyte of a new energy lithium battery according to claim 1, characterized in that: The supply tank body and the supply pipeline are provided with a cooling water tracing unit, and the cooling water tracing unit includes an electrolyte cooler (9), a cold water delivery pump (10), and a cooling water pipe (13).

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