CN211373166U

CN211373166U - Lithium battery dewatering high-vacuum tunnel furnace adopting liquid bath method for heating

Info

Publication number: CN211373166U
Application number: CN201922392299.0U
Authority: CN
Inventors: 郭作龙
Original assignee: Guoxing Dongguan New Energy Technology Co ltd
Current assignee: Guoxing Dongguan New Energy Technology Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-08-28
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses a lithium battery dewatering high vacuum tunnel furnace heated by a liquid bath method, which comprises a tunnel furnace shell, wherein a vacuum cavity and a drying cavity are arranged in the tunnel furnace shell; the vacuum cavity is connected with a vacuum pump, a first sealing door and a second sealing door are arranged at two ends of the vacuum cavity, the first sealing door is connected with the outside of the shell of the tunnel furnace, the second sealing door is connected with the drying cavity, an exchanger laminate is arranged in the vacuum cavity, a liquid flow channel is arranged in the exchanger laminate, and the liquid flow channel is connected with a heat exchanger and a liquid storage tank; the drying cavity is connected with a drying device, a circulation device is arranged in the drying cavity, and the circulation device takes out the tray with the battery cell from the vacuum cavity and circulates out of the tunnel furnace shell. The utility model has the advantages that: the lithium battery dewatering high-vacuum tunnel furnace heated by the liquid bath method can be used for simultaneously vacuumizing and heating in the vacuum cavity, so that the energy consumption and the occupied space of vacuum heating and drying are reduced.

Description

Lithium battery dewatering high-vacuum tunnel furnace adopting liquid bath method for heating

Technical Field

The utility model relates to a dry technical field of battery vacuum dewatering, especially a lithium cell dewatering high vacuum tunnel furnace who adopts liquid bath method heating.

Background

The new energy automobile is rapidly developed, the quality requirement of the new energy industry on the lithium battery is more and more strict, and lithium battery manufacturers need to continuously search for a production method with better quality, higher efficiency and lower cost to improve the production level of the lithium battery.

In the lithium cell in process of production, influence the key step of lithium cell quality during the dewatering drying process of lithium cell, if dry inadequately in the lithium cell, electrolyte in the battery can take place the reaction with water, generates trace harmful gas, has harmful effects to annotating liquid room environment, also can influence the quality of electrolyte itself simultaneously for the battery performance is bad, still can make the battery rivet rust. Therefore, the lithium battery needs to be dewatered and dried, and the influence of moisture on the lithium battery and the liquid injection environment is avoided.

The existing drying method comprises the traditional air-conveying convection heating method, the heated air heats the battery, and then the battery is vacuumized, and the method has high energy consumption and long heating time; the contact type electric heating method can quickly heat the battery, but the electric heating has large thermal inertia, has the condition of overheating, is easy to cause the damage of the battery and has the problem of high equipment cost; the high vacuum tunnel furnace is used for dewatering and drying, adopts air transportation type heating and is provided with three cavities, and the defects of high equipment energy consumption, large volume and high maintenance cost are overcome. For this reason, those skilled in the art need improvements to address the deficiencies of existing drying techniques.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to above-mentioned prior art not enough, a lithium cell dewatering high vacuum tunnel furnace that adopts liquid bath method heating is provided.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is: a lithium battery dewatering high-vacuum tunnel furnace heated by a liquid bath method comprises a tunnel furnace shell, wherein a vacuum cavity and a drying cavity are arranged in the tunnel furnace shell; the vacuum cavity is connected with a vacuum pump, a first sealing door and a second sealing door are arranged at two ends of the vacuum cavity, the first sealing door is connected with the outside of the shell of the tunnel furnace, the second sealing door is connected with the drying cavity, an exchanger laminate is arranged in the vacuum cavity, a liquid flow channel is arranged in the exchanger laminate, and the liquid flow channel is connected with a heat exchanger and a liquid storage tank; the drying cavity is connected with a drying device, a circulation device is arranged in the drying cavity, and the circulation device takes out the tray with the battery cell from the vacuum cavity and circulates out of the tunnel furnace shell.

Among the above-mentioned technical scheme, the circulation device includes manipulator and band conveyer, and the manipulator gets into the vacuum cavity through the second sealing door and takes out the tray of taking electric core and put in band conveyer, and band conveyer shifts out the tray circulation tunnel furnace shell.

In the technical scheme, the heat exchanger is provided with 3 flow channel interfaces, the liquid storage tank is provided with a liquid outlet and a liquid return port, and the plate of the heat exchanger is provided with a flow channel inlet and a flow channel outlet; the liquid outlet and the runner inlet are connected and provided with a liquid inlet valve, the liquid return port and the runner outlet are connected and provided with a liquid discharge valve, the 3 runner interfaces are correspondingly connected with the liquid outlet, the runner inlet and the liquid return port and the runner outlet, and the runner interfaces are provided with heat exchange valves.

Among the above-mentioned technical scheme, first sealing door is rotation type sealing door or translation formula sealing door, and the second sealing door is translation formula sealing door.

In the technical scheme, water or oil is stored in the liquid storage tank.

In the technical scheme, the plate of the exchanger is made of stainless steel materials or aluminum alloy materials.

The utility model has the advantages that: the lithium battery dewatering high-vacuum tunnel furnace heated by the liquid bath method can be used for simultaneously vacuumizing and heating in the vacuum cavity, so that the energy consumption and the occupied space of vacuum heating and drying are reduced.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of a connection structure of a heat exchanger according to an embodiment of the present invention.

Reference numerals

1. A tunnel furnace shell; 11. a first sealing door; 12. a second sealing door; 2. a vacuum chamber; 21. an exchanger lamina; 211. a flow channel inlet; 212. a flow channel outlet; 22. a tray; 23. an electric core; 3. a vacuum pump; 4. a heat exchanger; 41. a heat exchange valve; 42. a liquid inlet valve; 43. a drain valve; 44. a liquid storage tank; 441. a liquid outlet; 442. a liquid return port; 5. drying the cavity; 6. a manipulator; 7. a drying device; 8. a belt conveyor; 9. and a cavity inside the liquid injection machine.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 shows an embodiment of the present invention, which relates to a high vacuum tunnel furnace with a dewatering function for lithium battery heated by liquid bath method, comprising a tunnel furnace housing 1, and a vacuum cavity 2 and a drying cavity 5 disposed in the tunnel furnace housing 1. The vacuum cavity 2 is used for vacuum heating and drying of the lithium battery, the vacuum cavity 2 is connected with the vacuum pump 3, and the vacuum pump 3 is responsible for vacuumizing the vacuum cavity 2. Two ends of the vacuum cavity 2 are provided with a first sealing door 11 and a second sealing door 12, the first sealing door 11 is connected with the outside of the tunnel furnace shell 1, a battery cell 23 needing drying is placed on a tray 22, the first sealing door 11 is opened, and the tray 22 enters the vacuum cavity 2 from the first sealing door 11. The first and second sealing

doors

11 and 12 are closed to form a sealed space in the vacuum chamber 2. An exchanger laminate 21 is arranged in the vacuum cavity 2, a tray 22 provided with a battery is placed in the exchanger laminate 21, a liquid flow channel (not marked in the figure) is arranged in the exchanger laminate 21, the liquid flow channel is distributed inside the exchanger laminate 21, heat transfer is carried out between the liquid and the exchanger laminate 21 when the liquid flows through the liquid flow channel, and the heat of the exchanger laminate 21 is transferred to the tray 22 and a battery cell 23 in the tray 22 for heating. Preferably, the heat exchanger layer plates 21 are made of stainless steel or aluminum alloy materials, have good heat conductivity and strength, and can ensure heat exchange efficiency and bear the weight of the tray 22.

Referring to fig. 2, the heat exchanger plate 21 is connected to the heat exchanger 4 and the liquid storage tank 44 outside the vacuum chamber 2 through pipes, the heat exchanger plate 21 is provided with a flow channel inlet 221 and a flow channel outlet 212, and the heat-exchanged liquid enters the heat exchanger plate 21 through the flow channel inlet 221 and then flows out through the flow channel outlet 212. The heat exchanger 4 is used for adjusting the temperature of liquid, and 3 flow channel connectors are arranged on the heat exchanger 4; the liquid storage tank 44 is provided with a liquid outlet 441 and a liquid return port 442, and the liquid storage tank 44 stores liquid for heat exchange, which is generally water or oil. Specifically, a liquid outlet 441 of the liquid storage tank 44 is communicated with a flow channel inlet 221 of the exchanger layer plate 21, a liquid inlet valve 42 is arranged between the liquid outlet 441 and the flow channel inlet 221 to control whether the liquid storage tank 44 is directly communicated with the exchanger layer plate 21 for liquid inlet, a liquid return port 442 of the liquid storage tank 44 is communicated with a flow channel outlet 212 of the exchanger layer plate 21, and a liquid outlet valve 43 is arranged between the liquid return port 442 and the flow channel outlet 212 to control whether liquid flows back into the liquid storage tank 44. The 3 flow channel interfaces of the heat exchanger 4 are correspondingly connected with pipelines communicated with the liquid outlet 441 of the liquid storage tank 44, the flow channel inlet 221 and the liquid return port 442 of the exchanger layer plate 21 and the flow channel outlet 212, and the 3 flow channel interfaces are respectively provided with a heat exchange valve 41.

The heat exchanger 4 and the reservoir 44 perform heating and cooling functions in the tunnel furnace. At the beginning of heating, the liquid inlet valve 42 between the liquid storage tank 44 and the exchanger layer plate 21 is closed, the two heat exchange valves 41 of the heat exchanger 4 connecting the liquid outlet 441 of the liquid storage tank 44 and the flow channel inlet 221 of the exchanger layer plate 21 are opened, the liquid is heated by the heat exchanger 4, and the heated liquid enters the exchanger layer plate 21 to heat the tray 22 and the electric core 23. After the liquid has flowed out of the exchanger layer 21, the liquid discharge valve 43 at the liquid return port 442 is closed, the heat exchange valve 41 connected to the heat exchanger 4 between the liquid return port 442 and the flow path outlet 212 is opened, and the liquid flows back into the heat exchanger 4, is heated, and then flows into the exchanger layer 21. After the liquid between the heat exchanger 4 and the exchanger tier floor 21 is sufficient, the heat exchange valve 41 between the heat exchanger 4 and the reservoir 44 is closed. When the heat exchanger plate needs to be cooled, the liquid inlet valve 42 and the liquid outlet valve 43 are opened, the 3 heat exchange valves 41 are closed, and liquid with low temperature in the liquid storage tank 44 enters the heat exchanger plate 21 for cooling.

After the battery core 23 is heated and dried in the vacuum cavity 2 in vacuum, the vacuum cavity 2 is depressurized, and the tray 22 with the battery is moved out of the second sealing door 12. Drying chamber 5 is being connected to the other end of second sealing door 12, and drying chamber 5 is connected with drying device 7, and drying device 7 ensures the inside drying of drying chamber 5, avoids the battery to absorb moisture again at the circulation in-process. A circulation device is arranged in the drying cavity 5 and comprises a manipulator 6 and a belt conveyor 8. After the second sealing door 12 is opened, the manipulator 6 enters the vacuum chamber 2 to grab the tray 22 and place the tray 22 on the belt conveyor 8. A material outlet is formed in one side face of the drying cavity 5 and the tunnel furnace shell 1, the material outlet is connected with the inner cavity 9 of the liquid filling machine, the belt conveyor 8 extends into the inner cavity 9 of the liquid filling machine from the material outlet, the tray 22 with the battery is transferred into the inner cavity of the liquid filling machine by the belt conveyor 8, and vacuum heating and drying of the battery cell 23 are completed.

Further, the first sealing door 11 is communicated with the external space of the tunnel furnace shell 1, and can be opened and closed by adopting a rotary sealing door or a translation sealing door; the second sealing door 12 is tightly attached between the vacuum cavity 2 and the drying cavity 5, and a translation type sealing door can be adopted to save the moving space of the opening and closing door.

The above embodiments are merely illustrative and not restrictive, and all equivalent changes and modifications made by the methods described in the claims are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an adopt high vacuum tunnel furnace of lithium cell dewatering of liquid bath method heating which characterized in that: the tunnel furnace comprises a tunnel furnace shell, wherein a vacuum cavity and a drying cavity are arranged in the tunnel furnace shell; the vacuum cavity is connected with a vacuum pump, a first sealing door and a second sealing door are arranged at two ends of the vacuum cavity, the first sealing door is connected with the outer part of the shell of the tunnel furnace, the second sealing door is connected with the drying cavity, an exchanger laminated plate is arranged in the vacuum cavity, a liquid flow channel is arranged in the exchanger laminated plate, and the liquid flow channel is connected with a heat exchanger and a liquid storage tank; the drying cavity is connected with a drying device, a circulation device is arranged in the drying cavity, and the circulation device takes out the tray with the battery cell from the vacuum cavity and circulates and moves out of the tunnel furnace shell.

2. The high vacuum tunnel furnace for lithium battery water removal heated by liquid bath method as claimed in claim 1, wherein: the circulation device comprises a manipulator and a belt conveyor, the manipulator enters the vacuum cavity through the second sealing door, takes out the tray with the battery cell and places the tray on the belt conveyor, and the belt conveyor moves the tray out of the tunnel furnace shell in a circulation mode.

3. The high vacuum tunnel furnace for lithium battery water removal heated by liquid bath method as claimed in claim 1, wherein: the heat exchanger is provided with 3 flow channel interfaces, the liquid storage tank is provided with a liquid outlet and a liquid return port, and the exchanger layer plate is provided with a flow channel inlet and a flow channel outlet; the liquid outlet and the runner inlet are connected and provided with a liquid inlet valve, the liquid return port and the runner outlet are connected and provided with a liquid discharge valve, the 3 runner interfaces are correspondingly connected with the liquid outlet, the runner inlet and the liquid return port and the runner outlet, and the runner interfaces are provided with heat exchange valves.

4. The high vacuum tunnel furnace for lithium battery water removal heated by liquid bath method as claimed in claim 1, wherein: the first sealing door is a rotary sealing door or a translation sealing door, and the second sealing door is a translation sealing door.

5. The high vacuum tunnel furnace for lithium battery water removal heated by liquid bath method as claimed in claim 1, wherein: and water or oil is stored in the liquid storage tank.

6. The high vacuum tunnel furnace for lithium battery water removal heated by liquid bath method as claimed in claim 1, wherein: the exchanger layer plate is made of stainless steel materials or aluminum alloy materials.