Vacuum helium returning and nail sealing equipment for lithium battery

Abstract

The invention discloses lithium battery vacuum helium-returning nail sealing equipment which comprises a plurality of operation stations arranged along a conveying line body, battery tools moving to the operation stations are borne on the conveying line body, and a vacuum helium-returning full-nail-entering mechanism is arranged at the operation stations in a matched mode. The vacuum helium returning full-nailing mechanism comprises a guide sleeve and a ceramic rod, a liquid injection opening sealing cover is coaxially connected with a lower end opening of the guide sleeve in a sleeved mode, and a helium returning connector and a vacuum one-way valve are arranged on the side wall of the guide sleeve. By means of the mode, according to the lithium battery vacuum helium returning nail sealing equipment, the nail pre-feeding mechanism, the vacuum helium returning full nail feeding mechanism and the liquid injection opening wiping mechanism are arranged along the conveying line body to automatically achieve tail section treatment of a lithium battery liquid injection packaging production line, and structural details of all the mechanisms are optimized for the NG problem; therefore, the safety risk is obviously reduced, and the finished product yield and the production efficiency are effectively improved.

Description

Technical Field

[0001] The invention relates to the field of lithium battery liquid injection equipment, and in particular to a lithium battery vacuum helium return nail sealing equipment. Background Art

[0002] After the lithium battery is filled with liquid, it needs to be packaged. The packaging process generally uses a vacuum helium return process. In the packaging process of the sealing nails in the existing technology, the pressing pressure of the sealing nails will affect the sealing environment of the lithium battery filling port, so the finished lithium battery has a high defect rate. The existing technology takes up a large proportion of man-hours in the process of implementing the vacuum helium return process, resulting in the inability to synchronize the production line rhythm, thereby reducing the efficiency of modeling and processing. In addition, the finished lithium batteries that have been packaged still need to be manually cleaned in batches, and the cleaning effect is not good, which cannot meet production needs. Summary of the invention

[0003] The main technical problem solved by the present invention is to provide a lithium battery vacuum helium return nail sealing equipment, which is equipped with a pre-nail insertion mechanism, a vacuum helium return full nail insertion mechanism, and a liquid injection port wiping mechanism along the conveyor line to automatically realize the tail-end processing of the lithium battery liquid injection packaging production line, and makes multiple optimizations to the structural details of each mechanism to address the NG problem, thereby significantly reducing safety risks and effectively improving the finished product yield and production efficiency.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a lithium battery vacuum helium return nail sealing device, including a plurality of work stations arranged along a conveyor line body, the conveyor line body carries battery tooling that flows to each work station, and the work station is equipped with a vacuum helium return full nail insertion mechanism, the vacuum helium return full nail insertion mechanism includes a guide sleeve and a ceramic rod, the lower end port of the guide sleeve is coaxially sleeved with a liquid injection port sealing cover, and the side wall is provided with a helium return interface and a vacuum one-way valve, the ceramic rod is coaxially loaded in the guide sleeve, and the lower end face of the guide sleeve is retracted into the liquid injection port sealing cover to form a cavity, and the cavity is simultaneously connected to the helium return interface and the vacuum one-way valve through the guide sleeve.

[0005] In a preferred embodiment of the present invention, a guide channel is opened in the center of the guide sleeve, a sealing ring is embedded in the inner wall of the guide channel, the ceramic rod is interference fit in the sealing ring and penetrates into the guide channel, and the inner wall of the guide channel is sealed with the ceramic rod.

[0006] In a preferred embodiment of the present invention, a right-angle notch is opened on the outer wall of the guide sleeve to form a mounting plane, the vacuum one-way valve is perpendicular to the mounting plane and obliquely connected to the guide channel, and the inner wall of the guide channel forms a vacuum interface with a diameter three times that of the helium return interface.

[0007] In a preferred embodiment of the present invention, the diameter of the lower end port of the guide sleeve is larger than the diameter of the upper end port, the diameter change position of the guide channel is located at the helium return interface and the vacuum interface, the inner wall of the injection port sealing cover is provided with a groove, and the outer wall of the lower end port of the guide sleeve is provided with a clamping ring, and the clamping ring is interference fit with the groove.

[0008] In a preferred embodiment of the present invention, the top end of the ceramic rod is connected to a nailing cylinder through a coupling, the upper end of the guide sleeve is attached to a set of brackets, and the brackets are hoisted together with the nailing cylinder on a Z-axis linear module slide. A manifold is provided on the bracket, and a digital pressure gauge is integrated on the manifold. The manifold is connected to a vacuum one-way valve, and a helium control valve is provided on the bracket, and the helium control valve is connected to the helium return interface.

[0009] In a preferred embodiment of the present invention, each of the work stations is equipped with a pair of side-thrust cylinders arranged on both sides of the conveyor line body, a push block is installed at the front end of the side-thrust cylinder, a lithium battery profiling groove is provided on the push block, and a chamfer for positioning guidance is provided at the opening of the lithium battery profiling groove, and the conveyor line body is equipped with a pair of proximity switches at the upstream inlet of each pair of side-thrust cylinders, and the proximity switches and the side-thrust cylinders cooperate with each other.

[0010] In a preferred embodiment of the present invention, the work station is equipped with a pre-nail insertion mechanism upstream of the vacuum helium return full nail insertion mechanism, and the pre-nail insertion mechanism includes a manipulator carrying a vacuum suction head and a flexible vibration disk integrated with a sealing nail material bin, and the vacuum suction head is hoisted on a Z-axis linear slide, and a Z-axis lifting cylinder is provided next to the Z-axis linear slide. A spring shaft buffer seat is hung on one side of the Z-axis linear slide, and the Z-axis lifting cylinder is connected to the spring shaft buffer seat, and the vacuum suction head vertically downwards to connect the sealing nail flexible vibration disk and the battery tooling.

[0011] In a preferred embodiment of the present invention, a first visual camera is suspended on the manipulator, a second visual camera is suspended directly above the flexible vibration disk, and a third visual camera is suspended directly above the battery tooling. The first visual camera is used to capture the image of the lithium battery filling port in the battery tooling, the second visual camera is used to capture the image of the sealing nail in the flexible vibration disk, and the third visual camera is used to capture the image of the manipulator anchor point; a fourth visual camera arranged vertically is provided next to the flexible vibration disk, and the fourth visual camera is coaxially docked with the vacuum suction head to capture the image of the sealing nail on the vacuum suction head.

[0012] In a preferred embodiment of the present invention, the operating station is equipped with a group of liquid injection port wiping mechanisms downstream of the vacuum helium return full nail insertion mechanism, and the liquid injection port wiping mechanism includes a stop push rod and a wiping head, and the stop push rod is connected by a driving cylinder, and the wiping head is hoisted by a Z-axis slide cylinder, and the wiping head is connected to a rotating motor. The lower end surface of the wiping head is horizontally matched with a dust-free cloth belt, and the wiping head is crimped with the dust-free cloth belt through the Z-axis slide cylinder and connected to the battery tooling, and the dust-free cloth belt is integrated on a winding machine.

[0013] In a preferred embodiment of the present invention, the stop push rod is suspended in a J-shape on a linear rail slider, a photoelectric sensor facing the battery tooling is provided at the lower end of the stop push rod, the linear rail slider is horizontally spanned above the conveyor line body, a non-right angle is formed between the linear rail slider and the conveyor line body, the linear rail slider arranged at the non-right angle is connected to the driving cylinder in the same direction, the photoelectric sensor cooperates with the driving cylinder, and the speed component of the telescopic action of the driving cylinder in the flow direction of the conveyor line body offsets the linear speed of the conveyor line body to stop and buffer the lithium battery.

[0014] The beneficial effects of the present invention are as follows: the present invention provides a lithium battery vacuum helium return nail sealing equipment, which is equipped with a pre-nail insertion mechanism, a vacuum helium return full nail insertion mechanism, and a liquid injection port wiping mechanism along the conveyor line to automatically realize the tail section processing of the lithium battery liquid injection packaging production line, and makes multiple optimizations to the structural details of each mechanism to address the NG problem, thereby significantly reducing safety risks and effectively improving the finished product yield and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which: Figure 1 This is an overall structural diagram of a preferred embodiment of a lithium battery vacuum helium return nail sealing device of the present invention; Figure 2 It is the structural diagram of the guide sleeve; Figure 3 This is the structural diagram of the Z-axis linear module slide; Figure 4 It is the structural diagram of the manipulator; Figure 5 It is the structural diagram of the vacuum suction head; Figure 6 It is a structural diagram of the stop push rod; Figure 7 It is a structural diagram of the wiping head; Figure 8 It is a structural diagram of the coordination between the wiping head and the lithium battery. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] like Figure 1-8 As shown, the embodiment of the present invention includes: A lithium battery vacuum helium return nail sealing device comprises a plurality of work stations 2 arranged along a conveyor line body 1, the conveyor line body 1 carries battery tooling 3 that flows to each work station 2, the work station 2 is equipped with a vacuum helium return nailing mechanism 4, the vacuum helium return nailing mechanism 4 comprises a guide sleeve 401 and a ceramic rod 402, the lower end port of the guide sleeve 401 is coaxially sleeved with a liquid injection port sealing cover 403, the side wall is provided with a helium return interface 404 and a vacuum one-way valve 405, the ceramic rod 402 is coaxially loaded in the guide sleeve 401, the lower end face of the guide sleeve 401 is retracted into the liquid injection port sealing cover 403 to form a cavity 406, and the cavity 406 is simultaneously connected to the helium return interface 404 and the vacuum one-way valve 405 through the guide sleeve 401.

[0018] During the assembly process of the sealing nail, the sealing nail must be placed at the injection port in advance, and then the Z-axis linear module slide 416 presses the guide sleeve 401 down and presses it onto the lithium battery injection port. At this time, the injection port sealing cover 403 surrounds the entire lithium battery injection port, and the sealing nail is located in the cavity 406. At this time, the ceramic rod 402 is in a retracted state. When the ceramic rod 402 is retracted, the vacuum one-way valve 405 evacuates the lithium battery, and then helium is introduced into the helium return interface 404 to form a positive pressure environment. After maintaining the pressure for a specified time, the nailing cylinder 414 pushes the ceramic rod 402 out, and the ceramic rod 402 acts on the sealing nail to press the sealing nail into the injection port.

[0019] In order to further maintain the sealed environment of the cavity 406, a guide channel 407 is opened in the center of the guide sleeve 401, and a sealing ring 408 is embedded in the inner wall of the guide channel 407. The ceramic rod 402 is interference fit in the sealing ring 408 and penetrated into the guide channel 407. The inner wall of the guide channel 407 is sealed with the ceramic rod 402.

[0020] In order to further improve the efficiency of negative pressure vacuuming, a right-angle notch 409 is opened on the outer wall of the guide sleeve 401 to form a mounting plane 410. The vacuum one-way valve 405 is perpendicular to the mounting plane 410 and obliquely connected to the guide channel 407. The inner wall of the guide channel 407 forms a vacuum interface 411 with a diameter three times that of the helium return interface 404.

[0021] In order to further expand the flow rate of the guide channel 407 , the diameter of the lower port of the guide sleeve 401 is larger than the diameter of the upper port, and the diameter-changing position of the guide channel 407 is located at the helium return interface 404 and the vacuum interface 411 .

[0022] Since the liquid injection port sealing cover 403 needs to be frequently compressed and deformed, in order to improve the sealing performance of the liquid injection port sealing cover 403, the inner wall of the liquid injection port sealing cover 403 is provided with a groove 412a, and the outer wall of the lower end port of the guide sleeve 401 is provided with a retaining ring 412b, and the retaining ring 412b is interference fit with the groove 412a.

[0023] On the basis of the above process, in order to realize the automatic execution of vacuuming and returning to helium, the top of the ceramic rod 402 is connected to a nailing cylinder 414 through a coupling 413, and the upper end of the guide sleeve 401 is attached to a set of brackets 415, and the bracket 415 is hoisted together with the nailing cylinder 414 on a Z-axis linear module slide 416, and a manifold 416 is provided on the bracket 415, and a digital pressure gauge 417 is integrated on the manifold 416, and the manifold 416 is connected to the vacuum check valve 405, and a helium control valve 418 is provided on the bracket 415, and the helium control valve 418 is connected to the helium return interface 404. In this way, the nailing cylinder 414 can independently control the ceramic rod 402, and the Z-axis linear module slide 416 can independently control the injection port sealing cover 403, and the two can alternately complete the vacuuming and returning to helium processing actions.

[0024] In order to improve the positioning accuracy and stability of lithium batteries during the processing, each work station 2 is equipped with a pair of side-thrust cylinders 501 arranged on both sides of the conveyor line body 1, and a push block 502 is installed at the front end of the side-thrust cylinder 501. The push block 502 is provided with a lithium battery profiling groove, and the opening of the lithium battery profiling groove is provided with a chamfer for positioning guidance. The conveyor line body 1 is equipped with a pair of proximity switches 503 at the upstream flow inlet of each pair of side-thrust cylinders 501, and the proximity switches 503 and the side-thrust cylinders 501 cooperate with each other.

[0025] Before implementing the vacuum helium return process, this equipment needs to pre-take a sealing nail and pre-place it in the liquid injection port. For this purpose, the operation station 2 is equipped with a set of pre-nail insertion mechanism 6 upstream of the vacuum helium return full nail insertion mechanism 4. The pre-nail insertion mechanism 6 includes a manipulator 602 carrying a vacuum suction head 601 and a set of flexible vibration disk 604 integrated with a sealing nail material bin 603. The vacuum suction head 601 is hoisted on a Z-axis linear slide 602, and a Z-axis lifting cylinder 603 is provided next to the Z-axis linear slide 602. A spring shaft buffer seat 604 is hung on one side of the Z-axis linear slide 602. The Z-axis lifting cylinder 603 is connected to the spring shaft buffer seat 604, and the vacuum suction head 601 is vertically downward to connect the sealing nail flexible vibration disk 604 and the battery tooling 3. During the pre-nail insertion process, the sealing nail material bin 603 regularly dumps the sealing nails to the flexible vibration plate 604 through the telescopic vibration of the slide cylinder. A material hole positioning plate with a matrix structure is placed in the flexible vibration plate 604. After the vibration of the flexible vibration plate, each sealing nail is neatly stacked in place. The manipulator 602 carries the vacuum suction head 601 to pick up the material from the flexible vibration plate, and after sending it to the lithium battery injection port, the vacuum suction head breaks the vacuum, so that the sealing nail falls on the injection port.

[0026] In order to improve the positioning accuracy of the whole process of pre-inserting the sealing nail, the manipulator 602 is hoisted with a first visual camera 602a, the flexible vibration plate 604 is hoisted with a second visual camera 602b, and the battery fixture 3 is hoisted with a third visual camera 602c. The first visual camera 602a is used to collect the image of the lithium battery filling port in the battery fixture 3, the second visual camera 602b is used to collect the image of the sealing nail in the flexible vibration plate 604, and the third visual camera 602c is used to collect the anchor point image of the manipulator 602; the fourth visual camera 602d arranged vertically is provided next to the flexible vibration plate 604, and the fourth visual camera 602d is coaxially connected with the vacuum suction head 601 to collect the image of the sealing nail on the vacuum suction head 601. In the material picking stage, the second visual camera 602b provides the sealing nail positioning image and generates coordinates. During the transfer process, the manipulator 602 carries the sealing nail through the fourth visual camera 602d, which provides images and combines image recognition to determine whether the sealing nail is accurately in place. Finally, the first visual camera 602a captures the image of the lithium battery filling port to generate coordinate data for the manipulator 602 to perform the sealing nail placement action. After each action is completed, the manipulator 602 goes to the bottom of the third visual camera 602c to reset, and the third visual camera 602c captures the anchor point image of the manipulator 602 to confirm the reset state of the manipulator 602.

[0027] After the pre-nail insertion and vacuum helium return full nail insertion processes, a laser displacement sensor is also provided on the conveyor line body 1 to collect the nailing depth of the sealing nails to determine whether the nailing process is qualified.

[0028] After that, the OK products continue to flow downward. Since the electrolyte will contaminate the injection port and the sealing nail in the cavity 406 during the vacuum return to helium process, the sealing nail of the injection port must be wiped before the lithium battery is offline. The operation station 2 is equipped with a set of injection port wiping mechanisms 7 downstream of the vacuum return to helium full nailing mechanism 4. The injection port wiping mechanism 7 includes a stop push rod 701 and a wiping head 702. The stop push rod 701 is connected by a driving cylinder 703. The wiping head 702 is hoisted by a Z-axis slide cylinder 704. The wiping head 702 is connected to a rotating motor 705. The lower end surface of the wiping head 702 is horizontally matched with a dust-free cloth belt. The wiping head 702 is crimped with the dust-free cloth belt through the Z-axis slide cylinder 704 and connected to the battery tooling 3. The dust-free cloth belt is integrated on a coiling machine 706.

[0029] Furthermore, the stopping push rod 701 is suspended in a J-shape on a linear rail slider 707, and a photoelectric sensor 708 facing the battery tooling 3 is provided at the lower end of the stopping push rod 701. The linear rail slider 707 is horizontally spanned above the conveying line body 1, and a non-right angle is formed between the linear rail slider 707 and the conveying line body 1. The linear rail slider 707 arranged at the non-right angle is connected to the driving cylinder 703 in the same direction, and the photoelectric sensor 708 cooperates with the driving cylinder 703. The velocity component of the telescopic action of the driving cylinder 703 in the flow direction of the conveying line body 1 offsets the linear velocity of the conveying line body 1 to stop and buffer the lithium battery.

[0030] From the axial perspective of the driving cylinder 703, the linear rail slider 707 is horizontally deflected toward the downstream direction of the conveying line 1. When the photoelectric sensor 708 senses the lithium battery, the driving cylinder 703 extends, and the velocity component of the stop push rod 701 in the conveying direction of the conveying line 1 is reduced to 0 while maintaining the same acceleration as the conveying line 1. The stroke of the driving cylinder 703 does not exceed the width of the lithium battery. This can effectively prevent the lithium battery from hitting the stop push rod 701.

[0031] The wiping head 702 is pressed onto the sealing nail just driven at the lithium battery filling port through the dust-free cloth. The wiping head 702 is controlled by the rotary motor 705 to twist back and forth. The dust-free cloth twists synchronously with the wiping head 702 to repeatedly wipe the sealing nail.

[0032] In summary, the present invention provides a lithium battery vacuum helium return nail sealing equipment, which is equipped with a pre-nail insertion mechanism, a vacuum helium return full nail insertion mechanism, and a liquid injection port wiping mechanism along the conveyor line to automatically realize the tail-end processing of the lithium battery liquid injection packaging production line, and makes multiple optimizations to the structural details of each mechanism to address the NG problem, thereby significantly reducing safety risks and effectively improving the finished product yield and production efficiency.

[0033] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lithium battery vacuum helium sealing device, characterized in that: The invention comprises a plurality of work stations arranged along the conveyor line body, the conveyor line body carries battery tooling that flows to each work station, the work station is equipped with a vacuum helium return full nail insertion mechanism, the vacuum helium return full nail insertion mechanism comprises a guide sleeve and a ceramic rod, the lower end port of the guide sleeve is coaxially sleeved with a liquid injection port sealing cover, the side wall is provided with a helium return interface and a vacuum one-way valve, the ceramic rod is coaxially loaded in the guide sleeve, the lower end face of the guide sleeve is retracted into the liquid injection port sealing cover to form a cavity, and the cavity is communicated with the helium return interface and the vacuum one-way valve at the same time through the guide sleeve.

2. The lithium battery vacuum helium sealing device according to claim 1, characterized in that: A guide channel is provided at the center of the guide sleeve, a sealing ring is inlaid on the inner wall of the guide channel, the ceramic rod is interference fit in the sealing ring and penetrates the guide channel, and the inner wall of the guide channel is sealed with the ceramic rod.

3. The lithium battery vacuum helium sealing equipment according to claim 1, characterized in that: The outer wall of the guide sleeve is provided with a right-angle notch to form a mounting plane, the vacuum one-way valve is perpendicular to the mounting plane and obliquely connected to the guide channel, and the inner wall of the guide channel forms a vacuum interface with a diameter three times that of the helium return interface.

4. The lithium battery vacuum helium sealing device according to claim 2, characterized in that: The diameter of the lower end port of the guide sleeve is larger than that of the upper end port, the diameter-changing position of the guide channel is located at the helium return interface and the vacuum interface, the inner wall of the injection port sealing cover is provided with a groove, and the outer wall of the lower end port of the guide sleeve is provided with a clamping ring, and the clamping ring is interference fit with the groove.

5. The lithium battery vacuum helium sealing equipment according to claim 1, characterized in that: The top end of the ceramic rod is connected to a nailing cylinder through a coupling, the upper end of the guide sleeve is attached to a set of brackets, and the bracket is hoisted together with the nailing cylinder on a Z-axis linear module slide. A manifold is provided on the bracket, and a digital pressure gauge is integrated on the manifold. The manifold is connected to a vacuum one-way valve, and a helium control valve is provided on the bracket, and the helium control valve is connected to the helium return interface.

6. The lithium battery vacuum helium sealing device according to claim 1, characterized in that: Each of the work stations is equipped with a pair of side-thrust cylinders arranged on both sides of the conveyor line body. A push block is installed at the front end of the side-thrust cylinder. The push block is provided with a lithium battery profiling groove. The opening of the lithium battery profiling groove is provided with a chamfer for positioning guidance. The conveyor line body is equipped with a pair of proximity switches at the upstream flow inlet of each pair of side-thrust cylinders. The proximity switches and the side-thrust cylinders cooperate with each other.

7. The lithium battery vacuum helium sealing device according to claim 1, characterized in that: The work station is equipped with a pre-nail insertion mechanism upstream of the vacuum helium return full nail insertion mechanism, and the pre-nail insertion mechanism includes a manipulator carrying a vacuum suction head and a flexible vibration disk integrated with a sealing nail material bin. The vacuum suction head is hoisted on a Z-axis linear slide, and a Z-axis lifting cylinder is equipped next to the Z-axis linear slide. A spring shaft buffer seat is hung on one side of the Z-axis linear slide, and the Z-axis lifting cylinder is connected to the spring shaft buffer seat. The vacuum suction head vertically downward connects the sealing nail flexible vibration disk and the battery tooling.

8. The lithium battery vacuum helium sealing device according to claim 7, characterized in that: A first visual camera is mounted on the manipulator, a second visual camera is mounted directly above the flexible vibration disk, and a third visual camera is mounted directly above the battery tooling. The first visual camera is used to capture the image of the lithium battery filling port in the battery tooling, the second visual camera is used to capture the image of the sealing nail in the flexible vibration disk, and the third visual camera is used to capture the image of the manipulator anchor point; a fourth visual camera arranged vertically is provided next to the flexible vibration disk, and the fourth visual camera is coaxially docked with the vacuum suction head to capture the image of the sealing nail on the vacuum suction head.

9. The lithium battery vacuum helium sealing device according to claim 1, characterized in that: The work station is equipped with a group of liquid injection port wiping mechanisms downstream of the vacuum helium return full nail insertion mechanism, and the liquid injection port wiping mechanism includes a stop push rod and a wiping head, and the stop push rod is connected by a driving cylinder, and the wiping head is hoisted by a Z-axis slide cylinder, and the wiping head is connected to a rotating motor. The lower end surface of the wiping head is horizontally matched with a dust-free cloth belt, and the wiping head is crimped with the dust-free cloth belt through the Z-axis slide cylinder and connected to the battery tooling, and the dust-free cloth belt is integrated on a winding machine.

10. The lithium battery vacuum helium sealing device according to claim 9, characterized in that: The stop push rod is J-shaped and hoisted on a linear rail slider. A photoelectric sensor facing the battery tooling is provided at the lower end of the stop push rod. The linear rail slider is horizontally spanned above the conveyor line body. A non-right angle is formed between the linear rail slider and the conveyor line body. The linear rail slider arranged at the non-right angle is connected to the driving cylinder in the same direction. The photoelectric sensor cooperates with the driving cylinder. The speed component of the telescopic action of the driving cylinder in the flow direction of the conveyor line body offsets the linear speed of the conveyor line body to stop and buffer the lithium battery.

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