CN112589254A

CN112589254A - Press welding device for processing cap of lithium battery

Info

Publication number: CN112589254A
Application number: CN202011486396.7A
Authority: CN
Inventors: 黄春
Original assignee: Hangzhou Shengtong Technology Co ltd
Current assignee: Hangzhou Shengtong Technology Co ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-04-02

Abstract

The invention discloses a pressure welding device for machining a cap based on a lithium battery, which comprises an ultrasonic pressure welding machine and a movable platform, wherein the movable platform is arranged on one side of the ultrasonic pressure welding machine, a mounting box is fixedly mounted on the top surface of a moving end of the movable platform, a pressing plate is arranged above the mounting box, and a pressing strip is adhered to the bottom surface of the pressing plate. Has the advantages that: the clamping of the cap plate is completed through the pressing plate, so that workers can conveniently install the cap plate, the loading is more convenient, when the cap plate is installed, the cap plate can be plugged below the pressing strip on the bottom surface of the pressing plate, the top surface of the mounting box is placed, the cap of the cap plate is adjusted to be aligned with the lithium battery, the driving motor can be started to drive the screw rod to rotate, the pressing plate in threaded connection with the screw rod is driven to move downwards, the pressing strip is driven to press the edge of the cap plate, and the fixing of the cap plate is completed.

Description

Press welding device for processing cap of lithium battery

Technical Field

The invention relates to the technical field of lithium battery production, in particular to a pressure welding device for processing a lithium battery cover cap.

Background

The lithium battery is a primary battery which takes lithium metal or lithium alloy as a negative electrode material and uses a non-aqueous electrolyte solution, is different from a rechargeable battery lithium ion battery and a lithium ion polymer battery, and has very high environmental requirements due to the very active chemical characteristics of the lithium metal, so that the lithium battery is not applied for a long time, and along with the development of microelectronic technology at the end of the twentieth century, miniaturized equipment is increased day by day, very high requirements are provided for power supplies, and the lithium battery enters a large-scale practical stage.

Caps are welded at two ends of a cylindrical lithium battery at the present stage, the caps are connected with the lithium battery in a welding mode, the caps are arranged on a cap plate before being welded and are fixed by clamping equipment, the traditional clamping equipment is manual clamping equipment, the clamping speed is slow, the production efficiency is influenced, meanwhile, the welding head needs to be synchronously pressed when welding, the welding head causes more welding head structures, is easy to break down and affects the service life, the welded lithium battery is positioned in fixed equipment and is inconvenient to take out in batches, and further improvement can be made, in addition, although the flue gas in the welding process can be well absorbed, the flue gas can not be filtered in time, so that the working environment is polluted by the flue gas, once the battery is ignited, the traditional pressure welding device can not be used for putting out a fire in time, so that the fire spread is easily caused, and the use safety can be further improved.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a pressure welding device for processing a lithium battery cap, which has the advantages of convenience in installation and unloading, improvement of transportation efficiency, reduction of welding smoke dust, and safer and more reliable use, and further solves the problems in the background art.

(II) technical scheme

In order to realize the advantages of convenient installation, convenient unloading, improved transfer efficiency, reduced welding smoke dust and safer and more reliable use, the invention adopts the following specific technical scheme:

a press welding device for processing a cap of a lithium battery comprises an ultrasonic press welding machine and a moving platform, wherein the moving platform is arranged on one side of the ultrasonic press welding machine, a mounting box is fixedly mounted on the top surface of a moving end of the moving platform, a pressing plate is arranged above the mounting box, a pressing strip is pasted on the bottom surface of the pressing plate, side boxes are fixedly connected to the outer walls of two sides of the mounting box, a driving motor is fixedly mounted inside each side box, a screw rod is connected to the corner of the pressing plate in a penetrating mode and penetrates through each side box and extends to the inside of each side box, a partition plate is transversely and fixedly connected to the inside of each side box, a middle hole is formed in the center position of each partition plate, a ball groove is formed in the outer side of each middle hole, a spool is fixedly sleeved on the outer wall of each screw rod and consists of a middle column and, and the inner wall of the end plate is provided with a ball groove corresponding to the position of the ball groove formed in the surface of the partition plate, the ball groove is internally connected with balls in a rolling manner, the bottom surface of the screw is connected with the output end of the driving motor, the top surface of the mounting box is provided with a battery compartment, the mounting box is internally positioned below the battery compartment and is provided with an inner compartment, the battery compartment is internally connected with a piston in a sliding manner, and the ultrasonic press welder is connected with a welding head through a mounting rod.

Further, the interior bin is internally provided with a bearing plate, the top surface of the bearing plate is vertically and fixedly provided with an ejector rod, the top surface of the ejector rod penetrates through the battery bin and is fixedly connected with the bottom surface of the piston, the bottom surface of the bearing plate is vertically provided with an air cylinder, and the bottom surface of the air cylinder is fixedly connected with the bottom surface of the interior bin.

Further, the ultrasonic wave pressure welding machine is fixed to be encorbelmented and installs the roof, and roof one end is located bonding tool top fixed mounting and has the rose box to rose box one side fixed mounting has the vacuum pump, the vacuum pump tip passes through gas-supply pipe and rose box top surface through connection, and rose box bottom surface through connection has the breathing pipe to the breathing pipe other end is buckled downwards and is extended to bonding tool one side, fixed mounting has the fretwork board in the rose box, and packs between the fretwork board and has active carbon.

Further, the conveyer pipe has been erect to the roof below, and conveyer pipe surface link up and install the shower nozzle, roof top surface other end fixed mounting has the fire extinguisher, and fire extinguisher nozzle and conveyer pipe through connection to the conveyer pipe surface is located the roof top and installs the solenoid valve, roof bottom surface fixed mounting has smoke sensor, and smoke sensor output and solenoid valve input electric connection.

Furthermore, the bottom surface of the bearing plate and the inner bottom surface of the inner bin are connected with springs which are uniformly distributed among the cylinders.

Furthermore, the layering adopts the rubber material, and layering outward flange size is the same with installation box bottom surface outward flange size to the layering is located the installation box directly over.

Furthermore, the pressing plate is of a rectangular frame structure, and the opening area of the pressing plate is larger than the distribution area of the battery compartment.

Furthermore, the positive facade of the filter box is hinged with a closed door, and the closed door is arranged between the corresponding hollow-out plates.

Furthermore, the aperture of the hollow plate is smaller than the minimum particle size of the active carbon, and the hollow plate is made of metal.

Furthermore, the top surface of the screw is welded with a limiting plate, and the diameter of the limiting plate is larger than that of the screw.

(III) advantageous effects

Compared with the prior art, the invention provides a pressure welding device for processing a cap based on a lithium battery, which has the following beneficial effects:

(1) the clamping of the cap plate is completed through the pressing plate, so that workers can conveniently install the cap plate, the feeding is more convenient, when the cap plate is installed, the cap plate can be plugged below the pressing strip on the bottom surface of the pressing plate, the top surface of the mounting box is placed, the cap of the cap plate is adjusted to be aligned with the lithium battery, the driving motor can be started to drive the screw rod to rotate, the pressing plate in threaded connection with the screw rod is driven to move downwards, the pressing strip is driven to press the edge of the cap plate, and the fixing of the cap plate is completed.

(2) According to the invention, the piston is pushed to move upwards through the air cylinder so as to push the lithium battery to move upwards, and further the lithium battery is driven to abut against the cap to apply pressure, in the pressure welding process, the moving platform drives the mounting box to move so as to drive the battery compartment to sequentially move under the welding head, the welding head moves downwards, the lithium battery is pushed by the piston to move upwards while the welding head moves downwards, the welding head performs ultrasonic welding, the lithium battery abuts against the cap to apply pressure, so that pressure welding is completed, the cap falls off from the cap plate after welding is completed, compared with the traditional pressure welding equipment, the welding head only needs to perform welding without synchronously completing pressure application, the workload of the welding head is reduced, so that the service life of the welding head is prolonged, meanwhile, after welding is completed, the air cylinder can push the lithium battery to eject out of the battery compartment.

(3) The invention extracts smoke dust generated during welding through the vacuum pump, thereby evolving the working environment, when welding, the vacuum pump is started to evacuate the filter box, so that the inside of the filter box is in a negative pressure state, negative pressure is formed at the other end of the air suction pipe corresponding to the welding head, air near the welding head is extracted, the smoke dust generated during welding flows into the air suction pipe along with the air, enters the filter box, is filtered by activated carbon and then is discharged, thereby reducing the pollution of the smoke dust to the working environment, being convenient for clean production, in addition, once a fire disaster occurs, the smoke sensor senses smoke, the electromagnetic valve is opened, dry powder in the fire extinguisher is sprayed out from the spray head along the conveying pipe, and the ignited lithium battery is put out a fire, thereby avoiding the spread of the fire, and the use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a pressure welding device for processing a cap of a lithium battery according to an embodiment of the present invention;

FIG. 2 is a front view of a bonding apparatus for capping lithium battery cells according to an embodiment of the present invention;

FIG. 3 is a schematic view of a connection of a mounting box and a pressure plate according to an embodiment of the invention;

FIG. 4 is a schematic view showing the internal structure of a filtration tank according to an embodiment of the present invention;

FIG. 5 is a schematic view showing an external structure of a filter tank according to an embodiment of the present invention;

FIG. 6 is an enlarged view of a node A of a pressure welding device for processing a cap of a lithium battery according to an embodiment of the invention;

FIG. 7 is a schematic structural view of a spool according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a separator according to an embodiment of the present invention.

In the figure:

1. ultrasonic press welder; 2. mounting a rod; 3. a welding head; 4. a top plate; 5. mounting a box; 6. an inner bin; 7. a battery compartment; 8. a piston; 9. a mobile platform; 10. a cylinder; 11. a spring; 12. a support plate; 13. a top rod; 14. pressing a plate; 15. a filter box; 16. a gas delivery pipe; 17. a vacuum pump; 18. a delivery pipe; 19. a spray head; 20. a fire extinguisher; 21. a smoke sensor; 22. an electromagnetic valve; 23. an air intake duct; 24. a screw; 25. a side box; 26. layering; 27. a limiting plate; 28. activated carbon; 29. a closing door; 30. a ball bearing; 31. a spool; 32. a drive motor; 33. a partition plate; 34. an end plate; 35. a center pillar; 36. a ball groove; 37. a mesopore; 38. a hollowed-out plate.

Detailed Description

For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable others of ordinary skill in the art to understand the various embodiments and advantages of the invention, and, by reference to these figures, reference is made to the accompanying drawings, which are not to scale and wherein like reference numerals generally refer to like elements.

According to the embodiment of the invention, the pressure welding device for processing the lithium battery cap is provided.

Referring to the drawings and the detailed description, as shown in fig. 1-8, a pressure welding device for processing a lithium battery cell cap according to an embodiment of the present invention includes an ultrasonic pressure welding machine 1 and a moving platform 9, the moving platform 9 is disposed on one side of the ultrasonic pressure welding machine 1, which is a common structure and will not be described herein, a mounting box 5 is fixedly mounted on a top surface of a moving end of the moving platform 9, a pressing plate 14 is disposed above the mounting box 5, a pressing strip 26 is adhered to a bottom surface of the pressing plate 14, edge boxes 25 are fixedly connected to outer walls of two sides of the mounting box 5, a driving motor 32 is fixedly mounted inside the edge boxes 25, a screw 24 is connected to corners of the pressing plate 14 through threads, the screw 24 penetrates through the edge boxes 25 and extends into the edge boxes 25, a partition 33 is fixedly connected to the inside of the edge boxes 25 in a transverse direction, and a central hole 37 is formed in, and the outer side of the middle hole 37 is provided with a ball groove 36, the outer wall of the screw rod 24 is fixedly sleeved with a spool 31, the spool 31 consists of a middle column 35 and end plates 34, the two ends of the middle column 35 are welded with the end plates 34, the middle column 35 penetrates through the middle hole 37, the end plates 34 are distributed above and below the partition plate 33, the positions of the inner walls of the end plates 34 corresponding to the ball grooves 36 arranged on the surface of the partition plate 33 are also provided with the ball grooves 36, the ball grooves 36 are connected with balls 30 in a rolling manner, the balls 30 are positioned between the ball grooves 36 and are connected with the ball grooves 36 in a rolling manner, the end plates 34 support the screw rod 24 to prevent the screw rod 24 from moving up and down, the bottom surface of the screw rod 24 is connected with the output end of a driving motor 32, the top surface of the mounting box 5 is provided with a battery compartment 7, the mounting box 5 is internally provided with an inner compartment 6 positioned below the, ultrasonic wave press welder 1 is connected with bonding tool 3 through installation pole 2, for common structure, do not do too much repeated description here, when installing the block board, can fill in the layering 26 below of clamp plate 14 bottom surface with the block board, place and 5 top surfaces of mounting box, and adjust the block of block board and aim at the lithium cell, can start driving motor 32 and drive screw rod 24 and rotate, thereby drive the clamp plate 14 with 24 threaded connection of screw rod and remove downwards, thereby it pushes down the block board edge to drive layering 26, thereby accomplish the fixed of block board, for traditional fixed equipment, this device adopts electronic centre gripping, and easy operation is convenient, and the installation time is saved, and the work efficiency is improved.

In one embodiment, a bearing plate 12 is arranged inside the inner bin 6, an ejector rod 13 is vertically and fixedly installed on the top surface of the bearing plate 12, the top surface of the ejector rod 13 penetrates through the battery bin 7 and is fixedly connected with the bottom surface of the piston 8, an air cylinder 10 is vertically installed on the bottom surface of the bearing plate 12, the bottom surface of the air cylinder 10 is fixedly connected with the inner bottom surface of the inner bin 6, the top surface of a piston rod of the air cylinder 10 is fixedly connected with the bottom surface of the bearing plate 12, the air cylinders 10 are uniformly distributed at the corner of the bottom surface of the bearing plate 12, in the pressure welding process, the moving platform 9 drives the mounting box 5 to move so as to drive the battery bins 7 to sequentially move to be right below the welding head 3, while the welding head 3 moves downwards, the lithium battery moves upwards under the pushing of the piston 8, the welding head 3 carries out ultrasonic welding, the lithium battery supports the cap to apply pressure so as to, the synchronous pressing is not needed, the workload of the welding head 3 is reduced, the service life of the welding head 3 is prolonged, and meanwhile, after the welding is finished, the air cylinder 10 can push the lithium battery to eject the battery bin 7, so that the lithium battery can be conveniently taken by workers, the lithium battery is convenient to disassemble, and the transfer efficiency is improved.

In one embodiment, the ultrasonic press welder 1 is fixedly cantilevered with a top plate 4, one end of the top plate 4 is positioned above a welding head 3 and is fixedly provided with a filter box 15, one side of the filter box 15 is fixedly provided with a vacuum pump 17, the suction end of the vacuum pump 17 is communicated with the top surface of the filter box 15 through a gas pipe 16, the bottom surface of the filter box 15 is communicated with a gas suction pipe 23, the other end of the gas suction pipe 23 is bent downwards and extends to one side of the welding head 3 to reduce the distance and improve the smoking efficiency, hollow plates 38 are fixedly arranged in the filter box 15, activated carbon 28 is filled between the hollow plates 38, the hollow plates 38 facilitate gas exchange, when welding is carried out, the vacuum pump 17 is started to evacuate the filter box 15, so that the inside of the filter box 15 is in a negative pressure state, a negative pressure is formed at the position of the other end of the gas suction pipe 23 corresponding to the welding head, enters the filter box 15, is filtered by the active carbon 28 and then is discharged, thereby reducing the pollution of smoke dust to the working environment and being convenient for clean production.

In one embodiment, conveyer pipe 18 has been erect to roof 4 below, and conveyer pipe 18 surface link up installs

shower nozzle

19, 4 top surface other end fixed mounting of roof has fire extinguisher 20, and fire extinguisher 20 nozzle and conveyer pipe 18 through connection, and conveyer pipe 18 surface is located roof 4 top and installs

solenoid valve

22, 4 bottom surface fixed mounting of roof has smoke sensor 21, and smoke sensor 21 output and solenoid valve 22 input electric connection, for common fire control structure, do not do too much to describe here, in case when the conflagration breaing out, smoke sensor 21 response smog, solenoid valve 22 is opened, the inside dry powder of fire extinguisher 20 is spouted from shower nozzle 19 along conveyer pipe 18, put out a fire to the lithium cell that catches fire, thereby avoid the intensity of a fire to stretch, use safe and reliable more.

In one embodiment, the bottom surface of the supporting plate 12 and the inner bottom surface of the inner chamber 6 are connected with springs 11, the springs 11 are uniformly distributed between the cylinders 10, two ends of each spring 11 are fixedly connected with the bottom surfaces of the supporting plate 12 and the inner chamber 6, and the springs 11 pull the supporting plate 12 to reset, so that the piston 8 can reset quickly.

In one embodiment, the pressing strip 26 is made of rubber, the outer edge of the pressing strip 26 has the same size as the outer edge of the bottom surface of the mounting box 5, the pressing strip 26 is located right above the mounting box 5, so that the edge of the cap plate can be pressed conveniently, and meanwhile, the pressing strip 26 made of rubber avoids crushing the cap plate.

In one embodiment, the pressing plate 14 has a rectangular frame structure, and the opening area of the pressing plate 14 is larger than the distribution area of the battery compartment 7, so that the welding head 3 can extend into the battery compartment for welding.

In one embodiment, the front vertical surface of the filter box 15 is hinged with a closing door 29, which is a common closing structure and will not be described herein, and the closing door 29 is disposed between the corresponding hollowed-out plates 38, so that the closing door 29 can be opened to replace the activated carbon 28.

In one embodiment, the aperture of the hollowed-out plate 38 is smaller than the minimum particle size of the activated carbon 28, and the hollowed-out plate 38 is made of metal to prevent the activated carbon 28 from leaking.

In one embodiment, a limiting plate 27 is welded on the top surface of the screw 24, and the diameter of the limiting plate 27 is larger than that of the screw 24, so that the pressure plate 14 is prevented from falling off and is limited by the pressure plate 14.

The working principle is as follows:

when the cap plate is installed, the cap plate can be plugged under the pressing strip 26 on the bottom surface of the pressing plate 14, the top surface of the mounting box 5 is placed and mounted, and the cap of the cap plate is adjusted to be aligned with the lithium battery, so that the driving motor 32 can be started to drive the screw rod 24 to rotate, and the pressing plate 14 in threaded connection with the screw rod 24 is driven to move downwards, so that the pressing strip 26 is driven to press the edge of the cap plate, and the cap plate is fixed, compared with the traditional fixing equipment, the device adopts electric clamping, is simple and convenient to operate, saves the installation time, improves the working efficiency, meanwhile, in the pressure welding process, the moving platform 9 drives the mounting box 5 to move, so that the battery bin 7 is driven to move under the welding head 3 in sequence, the lithium battery moves upwards under the pushing of the piston 8 while the welding head 3 moves downwards, the welding head 3 performs ultrasonic welding, and the lithium battery props against the cap to apply, after welding, the cap falls off from the cap plate, compared with the traditional pressure welding equipment, the welding head 3 only needs to weld without synchronously pressing, the workload of the welding head 3 is reduced, thereby the service life of the welding head 3 is prolonged, simultaneously, after welding is finished, the air cylinder 10 can push the lithium battery to eject out of the battery bin 7, the lithium battery is convenient for workers to take and use, the lithium battery is convenient to disassemble, the transfer efficiency is improved, in addition, when welding is carried out, the vacuum pump 17 is started to evacuate the filter box 15, the inside of the filter box 15 is in a negative pressure state, negative pressure is formed at the other end of the air suction pipe 23 corresponding to the position of the welding head 3, air near the welding head 3 is extracted, smoke generated during welding flows into the air suction pipe 23 along with air and enters the filter box 15, the smoke is filtered by the active carbon 28 and then discharged, thereby the pollution of the smoke to the working, the smoke sensor 21 senses smoke, the electromagnetic valve 22 is opened, dry powder in the fire extinguisher 20 is sprayed out from the spray nozzle 19 along the conveying pipe 18, and the ignited lithium battery is extinguished, so that the fire is prevented from spreading, and the use is safer and more reliable.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a based on lithium cell battery block processing is with pressure welding device, its characterized in that, includes ultrasonic pressure welding machine (1) and moving platform (9), ultrasonic pressure welding machine (1) one side is provided with moving platform (9), and moving platform (9) remove end top surface fixed mounting have mounting box (5), mounting box (5) top is provided with clamp plate (14), and clamp plate (14) bottom surface paste have layering (26), mounting box (5) both sides outer wall fixed connection has limit box (25), and limit box (25) inside fixed mounting have driving motor (32), there is screw rod (24) clamp plate (14) corner through threaded connection, and screw rod (24) run through limit box (25) and extend to inside limit box (25), the inside horizontal fixedly connected with baffle (33) of limit box (25), and baffle (33) central point puts and has seted up mesopore (37), and the ball groove (36) has been seted up in mesopore (37) outside, the fixed shell of screw rod (24) outer wall has been connect with I-shaped wheel (31), and I-shaped wheel (31) comprises center pillar (35) and end plate (34), and end plate (34) have been welded at center pillar (35) both ends, center pillar (35) run through mesopore (37), end plate (34) distribute in baffle (33) upper and lower side, and the ball groove (36) position that the corresponding baffle (33) surface of end plate (34) inner wall was seted up has also been seted up ball groove (36), and ball groove (36) inside roll connection has ball (30), screw rod (24) bottom surface is connected with driving motor (32) output, battery compartment (7) has been seted up to mounting box (5) top surface, and mounting box (5) inside is located battery compartment (7) below and has been seted up inner bin (6), and battery compartment (7) inside sliding connection has piston (8), the ultrasonic pressure welding machine (1) is connected with a welding head (3) through a mounting rod (2).

2. The pressure welding device for machining the lithium battery cell cap is characterized in that a bearing plate (12) is arranged inside the inner bin (6), an ejector rod (13) is vertically and fixedly installed on the top surface of the bearing plate (12), the top surface of the ejector rod (13) penetrates through the battery bin (7) and is fixedly connected with the bottom surface of the piston (8), an air cylinder (10) is vertically installed on the bottom surface of the bearing plate (12), and the bottom surface of the air cylinder (10) is fixedly connected with the inner bottom surface of the inner bin (6).

3. The pressure welding device for machining the lithium battery cell cap is characterized in that the ultrasonic pressure welding machine (1) is fixedly provided with a top plate (4) in an overhanging mode, one end of the top plate (4) is located above the welding head (3) and is fixedly provided with a filter box (15), one side of the filter box (15) is fixedly provided with a vacuum pump (17), the air suction end of the vacuum pump (17) is communicated with the top surface of the filter box (15) through an air conveying pipe (16), the bottom surface of the filter box (15) is communicated with an air suction pipe (23), the other end of the air suction pipe (23) is bent downwards and extends to one side of the welding head (3), hollow plates (38) are fixedly arranged in the filter box (15), and activated carbon (28) is filled between the hollow plates (38).

4. The pressure welding device for machining the lithium battery cell cap is characterized in that a conveying pipe (18) is erected below the top plate (4), a spray head (19) is installed on the surface of the conveying pipe (18) in a penetrating mode, a fire extinguisher (20) is fixedly installed at the other end of the top surface of the top plate (4), a nozzle of the fire extinguisher (20) is connected with the conveying pipe (18) in a penetrating mode, an electromagnetic valve (22) is installed on the surface of the conveying pipe (18) above the top plate (4), a smoke sensor (21) is fixedly installed on the bottom surface of the top plate (4), and the output end of the smoke sensor (21) is electrically connected with the input end of the electromagnetic valve (22).

5. The pressure welding device for machining the lithium battery cell cap is characterized in that springs (11) are connected to the bottom surface of the supporting plate (12) and the inner bottom surface of the inner bin (6), and the springs (11) are uniformly distributed among the cylinders (10).

6. The pressure welding device for the lithium battery cell cap machining according to claim 1, wherein the pressing strip (26) is made of rubber, the outer edge size of the pressing strip (26) is the same as that of the bottom surface of the mounting box (5), and the pressing strip (26) is located right above the mounting box (5).

7. The pressure welding device for machining the lithium battery cell cap is characterized in that the pressure plate (14) is of a rectangular frame structure, and the opening area of the pressure plate (14) is larger than the distribution area of the battery bin (7).

8. The pressure welding device for machining the lithium battery cover cap is characterized in that the sealing door (29) is hinged to the right vertical surface of the filter box (15), and the sealing door (29) is arranged between the corresponding hollowed-out plates (38).

9. The pressure welding device for machining the lithium battery cover cap is characterized in that the pore diameter of the hollowed-out plate (38) is smaller than the minimum particle diameter of the activated carbon (28), and the hollowed-out plate (38) is made of metal.

10. The pressure welding device for machining the lithium battery cell cap is characterized in that a limiting plate (27) is welded to the top surface of the screw rod (24), and the diameter of the limiting plate (27) is larger than that of the screw rod (24).