CN215372071U

CN215372071U - Lithium electricity DEGAS technology vacuum system

Info

Publication number: CN215372071U
Application number: CN202121022754.9U
Authority: CN
Inventors: 李晓伟; 王广江
Original assignee: Tianjin Yanuo Chemical Equipment Co ltd
Current assignee: Tianjin Yanuo Chemical Equipment Co ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2021-12-31
Anticipated expiration: 2031-05-13

Abstract

The utility model discloses a lithium battery DEGAS process vacuum system which comprises a vacuum pump, wherein the vacuum pump, a vacuum buffer tank, a cryogenic unit and a heat exchanger form the vacuum unit, the air inlet end of the vacuum pump is connected with the air outlet end of the vacuum buffer tank through an air suction main pipeline, the air inlet end of the vacuum buffer tank is connected with the air outlet end of the heat exchanger through an air suction main pipeline, the air outlet end of the vacuum buffer tank is provided with an exhaust pipeline, the air inlet end of the vacuum pump is provided with a nitrogen pipeline and a compressed air pipeline, the heat exchanger is connected with the cryogenic unit through a pipeline, the vacuum pump and the heat exchanger are connected with a cooling water inlet through an air inlet pipeline, the vacuum pump and the heat exchanger are connected with a cooling water outlet through an water outlet pipeline, and the vacuum buffer tank is provided with a recovery mechanism. The utility model has the advantages that through the arrangement of a series of structures, the high-efficiency condensation is realized, the problem of temperature rise caused by the vacuum pump is solved, the overhaul and the maintenance are convenient, the electrolyte is recycled in front of the system, the corrosion damage of vacuum equipment is reduced, and the noise pollution of the vacuum system is reduced.

Description

Lithium electricity DEGAS technology vacuum system

Technical Field

The utility model relates to the technical field of lithium battery vacuum systems, in particular to a lithium battery DEGAS process vacuum system.

Background

A lithium battery is a secondary battery (rechargeable battery) that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. During charging and discharging, Li + is inserted and extracted back and forth between two electrodes: during charging, Li + is extracted from the positive electrode and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. The DEGAS is commonly called vacuum degassing and is an important process in the production and packaging process of the soft-package polymer lithium battery, and 1 vacuum pump is assembled in each device.

At present, the production site of lithium batteries is a clean and dry room, the constant temperature and humidity are required to be controlled, the dew point is controlled to be minus 40 ℃, the temperature is controlled to be 20-22 ℃, and the temperature of the site is increased due to the operation of dozens of vacuum pump devices; the lithium battery production has strict requirements on cleanliness, oil stain and the like, and the equipment is placed in a working environment on site to cause pollution such as noise, oil stain and the like; when the device enters a working site, the anti-static working clothes need to be worn, and the daily equipment is very inconvenient to overhaul and maintain; a large amount of electrolyte is generated at the DEGAS station, so that the DEGAS station can corrode and damage vacuum equipment and pollute the environment; a large amount of standby machines and maintenance personnel need to be configured to maintain and repair in real time, and the practicability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a vacuum system for a lithium-ion battery DEGAS process, which aims to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a lithium electricity DEGAS technology vacuum system, includes the vacuum pump, vacuum buffer tank, cryrogenic unit and heat exchanger constitute vacuum unit, the inlet end of vacuum pump is connected through the end of giving vent to anger of breathing in main line and vacuum buffer tank, the inlet end of vacuum buffer tank is connected through the end of giving vent to anger of breathing in main line and heat exchanger, the end of giving vent to anger of vacuum buffer tank is equipped with exhaust pipe, the inlet end of vacuum pump is equipped with nitrogen pipeline and compressed air pipeline, the heat exchanger passes through the pipeline and is connected with cryrogenic unit, vacuum pump and heat exchanger pass through inlet pipe and cooling water inlet connection, vacuum pump and heat exchanger pass through outlet pipe and cooling water outlet connection, be equipped with recovery mechanism on the vacuum buffer tank.

Preferably, one side of cryrogenic unit is equipped with the import No. one of being connected with water inlet pipe, be equipped with the export No. one of being connected with water outlet pipe on the cryrogenic unit of import top, the top of cryrogenic unit is equipped with import No. two and export No. two, import No. two and the heat transfer exit linkage of heat exchanger, export No. two and the heat transfer access connection of heat exchanger.

Preferably, the lower end of one side of the heat exchanger is provided with an air inlet, and the upper end of the heat exchanger, which is close to one side of the vacuum buffer tank, is provided with an air outlet connected with the vacuum buffer tank.

Preferably, a booster pump is arranged at one end of the water inlet pipeline close to the cooling water inlet, and a water filter is arranged on the water inlet pipeline between the booster pump and the cooling water inlet.

Preferably, a silencer is arranged on the exhaust pipeline of each vacuum pump.

Preferably, all be equipped with ball valve and manual butterfly valve on main pipeline, exhaust pipe, compressed air pipeline, water intake pipe, outlet conduit and the nitrogen gas pipeline of breathing in, the main pipeline of breathing in of vacuum pump is equipped with pneumatic butterfly valve and vacuum meter, be equipped with vacuum meter and vacuum gauge on the vacuum buffer tank.

Preferably, the inner surface of the cavity of the vacuum pump and the inner surface of the vacuum buffer tank are both provided with an anticorrosive coating.

Preferably, the recycling mechanism comprises a liquid outlet, a liquid discharge pipe and a recycling tank, the bottom of the vacuum buffer tank is provided with the liquid outlet, the liquid discharge pipe is connected with the recycling tank through the liquid discharge pipe, and the liquid discharge pipe is provided with a ball valve.

Compared with the prior art, the utility model has the beneficial effects that:

1. this lithium electricity DEGAS technology vacuum system, vacuum pump through setting up, the vacuum buffer tank, cryrogenic unit and heat exchanger constitute vacuum unit and be used for lithium electricity DEGAS technology, high-efficient condensation, can solve the problem that many vacuum pump equipment of current technology operation lead to the lithium electricity production site temperature rise, thereby make the use of vacuum pump can not be clean drying room to lithium electricity production site, need constant temperature and humidity control to cause the interference, vacuum unit is equivalent to the pump station and is used for lithium electricity DEGAS technology simultaneously, central authorities 'form, the automatic control operation, personnel's configuration has been reduced, make things convenient for the daily maintenance of overhauing of equipment.

2. This lithium electricity DEGAS technology vacuum system through the heat exchanger that sets up on vacuum unit, can be to vacuum unit heat transfer cooling the time, the heat transfer result of heat exchanger can be used for cryrogenic unit to carry out the defrosting and handle to realize heat exchanger heat transfer recycle, guarantee the defrosting operation of cryrogenic unit when energy-concerving and environment-protective.

3. This lithium electricity DEGAS technology vacuum system through setting up the recovery mechanism on vacuum buffer tank, can retrieve the electrolyte that lithium electricity DEGAS technology produced in the front of the system, reduces the lithium electricity DEGAS technology and to the corrosion damage of vacuum apparatus, the anticorrosive coating that vacuum apparatus set up improves equipment corrosion resisting property.

4. This lithium electricity DEGAS technology vacuum system through setting up the muffler on vacuum unit exhaust pipe, can reduce lithium electricity DEGAS technology vacuum system's noise pollution.

Drawings

FIG. 1 is a schematic view of the entire structure of embodiment 1;

FIG. 2 is a schematic structural diagram of a heat exchanger;

FIG. 3 is a schematic view of the vacuum pump;

fig. 4 is a schematic structural view of embodiment 2.

In the figure: 1. a vacuum pump; 2. a vacuum buffer tank; 21. a liquid discharge port; 22. a liquid discharge pipe; 23. a recovery tank; 3. a cryogenic unit; 31. an inlet I; 32. an outlet I; 33. an inlet II; 34. an outlet II; 4. a heat exchanger; 41. an air inlet; 42. an air outlet; 5. a main air intake pipeline; 6. an exhaust line; 61. a muffler; 7. a compressed air line; 8. a water inlet pipeline; 9. a water outlet pipeline; 10. a cooling water inlet; 11. a cooling water outlet; 12. a nitrogen line; 13. a booster pump; 14. a ball valve; 15. a vacuum gauge; 16. a manual butterfly valve; 17. a pneumatic butterfly valve; 18. a vacuum gauge.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1-3, the lithium ion electric DEGAS process vacuum system of the embodiment includes a vacuum pump 1, the vacuum pump 1, a vacuum buffer tank 2, a deep cooling unit 3 and a heat exchanger 4, wherein an air inlet end of the vacuum pump 1 is connected with an air outlet end of the vacuum buffer tank 2 through an air suction main pipeline 5, an air inlet end of the vacuum buffer tank 2 is connected with an air outlet end of the heat exchanger 4 through the air suction main pipeline 5, an air outlet end of the vacuum buffer tank 2 is provided with an exhaust pipeline 6, an air inlet end of the vacuum pump 1 is provided with a nitrogen pipeline 12 and a compressed air pipeline 7, the heat exchanger 4 is connected with the deep cooling unit 3 through a pipeline, the vacuum pump 1 and the heat exchanger 4 are connected with a cooling water inlet 10 through an air inlet pipeline 8, the vacuum pump 1 and the heat exchanger 4 are connected with a cooling water outlet 11 through an water outlet pipeline 9, the vacuum buffer tank 2 is provided with a recovery mechanism, the air suction main pipeline 5 performs air inlet heat exchange through the heat exchanger 4, cooling water enters a deep cooling unit 3 from a cooling water inlet 10 through a water inlet pipeline 8 for condensation, a refrigerant of the deep cooling unit 3 enters a heat exchanger 4 for cooling inlet air, the cooled air enters a vacuum buffer tank 2 through the heat exchanger 4, gas and liquid are separated in the vacuum buffer tank 2, air enters a vacuum pump 1 through an air suction main pipeline 5 and is exhausted through an exhaust pipeline 6 of the vacuum pump 1, the vacuum buffer tank 2, the deep cooling unit 3 and the heat exchanger 4 form the vacuum unit for the lithium battery DEGAS process, the problem of temperature rise of the lithium battery production site caused by operation of a plurality of vacuum pumps 1 in the prior art can be solved, and therefore the use of the vacuum pump 1 can not cause interference to the lithium battery production site due to the fact that the lithium battery production site is a clean dry room and needs constant temperature and humidity control, meanwhile, the vacuum unit is equivalent to a pump station for the lithium battery DEGAS process, is in a central form and automatically controlled operation, personnel allocation is reduced, and the daily overhaul and maintenance of the equipment are facilitated.

Specifically, one side of cryrogenic unit 3 is equipped with import 31 of being connected with water inlet pipe 8, be equipped with export 32 of being connected with outlet pipe 9 on the cryrogenic unit 3 of import 31 top, the top of cryrogenic unit 3 is equipped with import 33 and export 34 No. two, import 33 and heat exchanger 4's heat transfer exit linkage No. two, export 34 and heat exchanger 4's heat transfer access linkage No. two, can jointly use heat exchanger 4 and cryrogenic unit 3, the cold source of cryrogenic unit 3 is used for heat exchanger 4 to carry out the heat exchange and cools down to vacuum pump 1 air inlet, the hot product of heat exchanger 4 is used for the use of cryrogenic unit 3, thereby realize heat exchanger 4 heat transfer recycle, guarantee the defrosting operation of cryrogenic unit 3 when energy-concerving and environment-protective.

Further, the lower extreme of heat exchanger 4 one side is equipped with air inlet 41, and the upper end that heat exchanger 4 is close to vacuum buffer tank 2 one side is equipped with the gas outlet 42 of being connected with vacuum buffer tank 2, is convenient for be connected between heat exchanger 4 and the vacuum buffer tank 2.

Furthermore, one of the water inlet pipeline 8 close to the cooling water inlet 10 is provided with a booster pump 13, and the water inlet pipeline 8 between the booster pump 13 and the cooling water inlet 10 is provided with a water filter, so that the water inlet of the vacuum pump 1 and the copious cooling unit 3 can be pressurized and filtered, and the stable operation of the equipment is ensured.

Further, all be equipped with muffler 61 on the exhaust pipe 6 on every vacuum pump 1, can carry out the amortization to the exhaust of vacuum unit, reduce lithium electricity DEGAS technology vacuum system's noise pollution.

Further, all be equipped with ball valve 14 and manual butterfly valve 16 on main 5, exhaust pipe 6, compressed air pipeline 7, water intake pipe 8, outlet conduit 9 and the nitrogen gas pipeline 12 of breathing in, be equipped with pneumatic butterfly valve 17 and vacuum meter 15 on the main 5 of breathing in of vacuum pump 1, be equipped with vacuum meter 15 and vacuum gauge 18 on the vacuum buffer tank 2, ball valve 14, manual butterfly valve 16 and pneumatic butterfly valve 17 that set up on the pipeline, conveniently control lithium electricity DEGAS technology vacuum system pipeline, the setting of vacuum meter 15 and vacuum gauge 18, conveniently monitor the vacuum unit.

Furthermore, the inner surface of the cavity of the vacuum pump 1 and the inner surface of the vacuum buffer tank 2 are both provided with an anti-corrosion coating, so that the self-corrosion resistance of the equipment is improved, and the service life of the equipment is prolonged.

Example 2

The structure of the vacuum system of the lithium-ion battery DEGAS process in the embodiment is basically the same as that of the vacuum system of the lithium-ion battery DEGAS process in the embodiment 1, and the difference is that: the recovery mechanism includes a drain port 21, a drain pipe 22, and a recovery tank 23 (see fig. 4). The bottom of vacuum buffer tank 2 is equipped with leakage fluid dram 21, leakage fluid dram 21 passes through fluid-discharge tube 22 and is connected with recovery jar 23, be equipped with ball valve 14 on the fluid-discharge tube 22, the air that contains electrolyte is the gas-liquid separation in vacuum buffer tank 2, open ball valve 14 on the fluid-discharge tube 22, retrieve the electrolyte in the vacuum buffer tank 2 to recovery jar 23, can retrieve the electrolyte that lithium electricity DEGAS technology produced in the front of the system, reduce the corrosion damage of lithium electricity DEGAS technology to vacuum apparatus, the practicality is stronger.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lithium electricity DEGAS technology vacuum system, includes vacuum pump (1), its characterized in that: vacuum pump (1), vacuum buffer tank (2), cryrogenic unit (3) and heat exchanger (4) constitute vacuum unit, the inlet end of vacuum pump (1) is connected through the end of giving vent to anger of breathing in main line (5) and vacuum buffer tank (2), the inlet end of vacuum buffer tank (2) is connected through the end of giving vent to anger of breathing in main line (5) and heat exchanger (4), the end of giving vent to anger of vacuum buffer tank (2) is equipped with exhaust pipe (6), the inlet end of vacuum pump (1) is equipped with nitrogen pipeline (12) and compressed air pipeline (7), heat exchanger (4) are connected with cryrogenic unit (3) through the pipeline, vacuum pump (1) and heat exchanger (4) are connected with cooling water import (10) through inlet pipe (8), vacuum pump (1) and heat exchanger (4) are connected with cooling water outlet (11) through outlet pipe (9), and a recovery mechanism is arranged on the vacuum buffer tank (2).

2. The vacuum system for a lithium-ion electric DEGAS process according to claim 1, wherein: one side of cryrogenic unit (3) is equipped with import (31) of being connected with inlet channel (8), be equipped with export (32) of being connected with outlet pipe way (9) on cryrogenic unit (3) of import (31) top, the top of cryrogenic unit (3) is equipped with import (33) No. two and export (34) No. two, import (33) No. two and the heat transfer exit linkage of heat exchanger (4), export (34) No. two and the heat transfer access connection of heat exchanger (4).

3. The vacuum system for a lithium-ion electric DEGAS process according to claim 1, wherein: the lower extreme of heat exchanger (4) one side is equipped with air inlet (41), the upper end that heat exchanger (4) is close to vacuum buffer tank (2) one side is equipped with gas outlet (42) of being connected with vacuum buffer tank (2).

4. The vacuum system for a lithium-ion electric DEGAS process according to claim 1, wherein: one end of the water inlet pipeline (8) close to the cooling water inlet (10) is provided with a booster pump (13), and a water filter is arranged on the water inlet pipeline (8) between the booster pump (13) and the cooling water inlet (10).

5. The vacuum system for a lithium-ion electric DEGAS process according to claim 1, wherein: and a silencer (61) is arranged on the exhaust pipeline (6) on each vacuum pump (1).

6. The vacuum system for a lithium-ion electric DEGAS process according to claim 1, wherein: all be equipped with ball valve (14) and manual butterfly valve (16) on main line (5), exhaust pipe (6), compressed air pipeline (7), inlet channel (8), outlet conduit (9) and nitrogen gas pipeline (12) of breathing in, be equipped with pneumatic butterfly valve (17) and vacuum meter (15) on main line (5) of breathing in of vacuum pump (1), be equipped with vacuum meter (15) and vacuum gauge (18) on vacuum buffer tank (2).

7. The vacuum system for a lithium-ion electric DEGAS process according to claim 6, wherein: and the inner surface of the cavity of the vacuum pump (1) and the inner surface of the vacuum buffer tank (2) are both provided with an anticorrosive coating.

8. The vacuum system for a lithium-ion electric DEGAS process according to claim 1, wherein: the recycling mechanism comprises a liquid discharge port (21), a liquid discharge pipe (22) and a recycling tank (23), the liquid discharge port (21) is arranged at the bottom of the vacuum buffer tank (2), the liquid discharge port (21) is connected with the recycling tank (23) through the liquid discharge pipe (22), and a ball valve (14) is arranged on the liquid discharge pipe (22).