Battery cell connecting piece welding mechanism

Abstract

The invention relates to the technical field of battery cell connecting piece welding, and discloses a battery cell connecting piece welding mechanism which comprises a processing platform and further comprises two battery cells arranged above the processing platform; the connecting sheet is arranged between the two battery cells; the clamping groove is formed in the top of the processing platform and is used for limiting the two battery cells; the dust removal cover is arranged above the machining platform and used for providing a closed space for the connecting piece in the welding process; the partition plate is arranged in the dust removal cover; a welding chamber is formed in the space between the two partition plates. The air inlet pipe is arranged on the back face of the dust removal cover, the cleaning brush moves front and back to clean welding slag on a welding point, and the cleaning brush moves left and right in a reciprocating mode under the action of the curved sliding rail and the first spring, so that the comprehensiveness and uniformity effect of cleaning the welding slag on the welding points at different positions is further improved, and the situation that welding slag residues affect the welding quality is effectively avoided. And the welding effect of the battery cell and the connecting sheet is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of battery core connecting piece welding, and in particular to a battery core connecting piece welding mechanism. Background Art

[0002] With the booming development of the new energy industry, lithium-ion batteries, with their advantages such as high energy density and long cycle life, are widely used in electric vehicles, energy storage systems, and other fields. As the core component of lithium-ion batteries, the quality of the welding between the battery cell and the connecting plate plays a key role in the battery's performance, safety, and service life. In this industry development trend, welding technology is particularly important. In the production of lithium-ion batteries, the battery cell and the connecting plate must be welded together.

[0003] According to a Chinese patent application numbered "CN209773732U," a battery cell connector welding mechanism includes a welding table, a laser welding assembly, and a dust hood. The dust hood includes a battery cell housing and a welding chamber. The welding chamber is provided with an air inlet and an exhaust hole. The air inlet is equipped with an air blow pipe connected to the welding chamber, and the exhaust hole is equipped with an exhaust pipe connected to the welding chamber. The mechanism is provided with a dust hood, and the welding chamber of the dust hood is connected to a shielding gas delivery device and a vacuum generator via an air blow pipe and an exhaust pipe, respectively. When the laser welding assembly performs laser welding on the battery cell connector and the pole of the top cover, the shielding gas delivery device introduces shielding gas into the welding chamber, and the vacuum generator extracts the metal spatter and the welding slag generated by the welding from the welding chamber by means of negative pressure vacuuming, thereby eliminating the welding slag and preventing the welding slag from adversely affecting the battery cell. This improves the safety of the battery while ensuring the performance and quality of the battery.

[0004] The above patent uses a cleaning brush to move vertically to clean the welding slag on the surface of the welding point during use. However, there are a large number of welding points on the connecting piece, and the cleaning brush cannot move horizontally. Therefore, the welding slag on each welding point cannot be effectively cleaned, thereby affecting the welding effect. Therefore, a battery cell connecting piece welding mechanism is proposed to solve the above-mentioned problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a welding mechanism for a battery cell connecting piece in view of the above-mentioned deficiencies in the prior art.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a battery cell connecting piece welding mechanism, including a processing platform, and also including: Two battery cells are placed above the processing platform; A connecting piece, provided between two battery cells; The card slot is opened on the top of the processing platform and is used to limit the two battery cells; The dust removal hood is installed above the processing platform to provide a closed space for the connecting pieces during the welding process; a partition plate, arranged inside the dust hood; The space between the two partitions forms a welding chamber; The air inlet pipe is located on the back of the dust removal cover and is used to connect to an external air pump to blow air into the welding room; The exhaust pipe is installed on the front of the dust removal cover and is used to connect an external vacuum cleaner to suck out the welding slag in the welding chamber; Two lasers are installed inside the welding chamber and are used to perform laser welding on the two battery cells and the connecting piece; A cleaning mechanism is provided inside the welding chamber and is used to clean the welding slag generated by laser welding; The cleanup agencies include: A linear motor is installed inside the welding chamber to drive the two lasers to move; The motor slide rail is arranged inside the welding chamber and is used to limit the movement of the linear motor; The two lasers are arranged on both sides of the linear motor; The left and right sides of the dust removal cover are fixedly connected with columns, the bottom of the columns is fixedly connected with a base, the top of the base is fixedly connected with a hydraulic cylinder, and the top of the hydraulic cylinder is fixedly connected to the bottom of the processing platform.

[0007] A first fixed block is fixedly connected to the bottom of the linear motor, a first sliding groove is penetrated through the front of the first fixed block, a first slider is slidably connected to the inside of the first sliding groove through a linear bearing, and the first slider is limited to sliding only in the left and right directions by setting the linear bearing, and a cleaning brush is fixedly connected to the front of the first slider, and the cleaning brush is in contact with the connecting piece.

[0008] Preferably, a curved slide rail is provided on the left partition, and a spherical top block is fixedly connected to the cleaning brush through a connecting rod, and the spherical top block is slidably connected to the curved slide rail, and a telescopic rod is fixedly connected to the right side of the cleaning brush, and the right end of the telescopic rod is fixedly connected to the first roller, and the first roller is slidably connected to the right partition, and a first spring is provided on the outer side of the telescopic rod, and the left end of the first spring is fixedly connected to the cleaning brush, and the right end of the first spring is fixedly connected to the first roller, and the cleaning brush is restricted by the curved slide rail and the first spring to move back and forth left and right during the forward and backward movement.

[0009] Preferably, a vibration mechanism is provided on the back of the linear motor, and the vibration mechanism includes two second fixed blocks, the two second fixed blocks are fixedly connected to the back of the first fixed block, the two second fixed blocks are respectively arranged on the left and right sides of the first slide groove, and a hole is opened on the top of the second fixed block, a sliding rod is passed through the hole through a linear bearing, and a knocking hammer is fixedly connected to the bottom of the sliding rod, and the vibration generated by the knocking hammer hitting the connecting piece eliminates the residual stress generated by welding.

[0010] Preferably, the top end of the sliding rod is fixedly connected to the limiting block, the outer sleeve of the sliding rod is provided with a second spring, the top end of the second spring is fixedly connected to the limiting block, and the bottom end of the second spring is fixedly connected to the second fixed block. The sliding rod is driven to rebound by setting the second spring, and the back side of the sliding rod is fixedly connected to a triangular top block, and the rear end of the first sliding block is fixedly connected to a trapezoidal top block. The trapezoidal top block is in contact with the two triangular top blocks, and the triangular top block, the sliding rod and the knocking hammer are driven to move upward by the left and right movement of the trapezoidal top block.

[0011] Preferably, the bottom of the first slider is fixedly connected to two brackets, and a second roller is arranged between the two brackets. The second roller is slidingly connected to the connecting piece. When the second roller rolls on the surface of the connecting piece, it will apply a certain pressure to it, thereby eliminating residual stress on its surface.

[0012] Preferably, a dredging mechanism is provided inside the air intake pipe, and the dredging mechanism includes a filter screen, and the filter screen is fixedly connected to the inside of the air intake pipe. The air entering the welding chamber is filtered by setting the filter screen. The middle part of the filter screen is fixedly connected to a threaded sleeve, and the internal thread of the threaded sleeve is connected to a screw rod. The front end of the screw rod is rotatably connected to the linear motor, and the rear end of the screw rod is fixedly connected to a movable block. The outside of the movable block is provided with bristles, and the bristles are in contact with the inner wall of the air intake pipe. By setting the bristles, impurities adhered to the inner wall of the air intake pipe are cleaned, thereby improving the patency of the air intake pipe.

[0013] Preferably, a thimble is fixedly connected to the front of the movable block, and the thimble is in contact with the filter screen, and the clogged filter holes on the filter screen are cleared by the thimble.

[0014] Preferably, the interior of the dust collector is fixedly connected to a dust box, a second slide groove is provided inside the dust box, the interior of the second slide groove is slidably connected to a cover plate via a second slider, an elastic pull rope is provided between the back side of the cover plate and the filter screen, and a push plate is fixedly connected to the top of the cover plate, and the push plate is in contact with the ejector pin.

[0015] The present invention adopts the above technical solution, which can bring the following beneficial effects: 1. This invention provides a cleaning mechanism, which allows the cleaning brush to move back and forth to clean the welding slag on the welding points. The cleaning brush moves back and forth left and right under the action of the curved slide rail and the first spring, further improving the comprehensiveness and uniformity of cleaning the welding slag at welding points in different positions, effectively avoiding the influence of welding slag residue on welding quality, and ensuring the welding effect of battery cells and connecting pieces.

[0016] 2. This invention incorporates a vibration mechanism. After the laser completes welding, a linear motor drives the trapezoidal top block and hammers to move. The trapezoidal top block drives the two hammers to strike the connecting piece, generating vibrations that eliminate residual stress from welding. Simultaneously, a second roller at the bottom of the first slider rolls on the surface of the connecting piece to apply pressure. This further improves the effectiveness of eliminating residual stress on the connecting piece, reduces the adverse effects of residual stress on battery performance, and enhances the stability of the battery's internal connection structure.

[0017] 3. This invention achieves the effect of cleaning impurities in the intake pipe and unclogging the filter by providing a dredging mechanism. When the linear motor moves back and forth, it drives the screw to rotate, causing the movable block to use the bristles to clean impurities on the inner wall of the intake pipe. At the same time, the ejector pin on the movable block unclogging the filter. The design of the screw driving the movable block to rotate and move back and forth makes the cleaning and unclogging work more efficient. At the same time, when the ejector pin unclogging the filter, it pushes the push plate and cover plate to collect impurities removed from the filter, further ensuring the cleanliness of the welding room. This further improves the maintenance effect of the patency of the intake pipe, ensures the cleanliness of the air entering the welding room, and prevents impurities from entering and affecting the welding environment and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the processing platform area in the present invention; Figure 3 This is a schematic diagram of the bottom structure of the exploded view of the processing platform area in the present invention; Figure 4 The bottom structural diagram of the laser region structural diagram in the present invention; Figure 5 This is a schematic diagram of the bottom structure of the exploded view of the linear motor area in the present invention; Figure 6 This is a schematic diagram of the cleaning brush area structure of the present invention; Figure 7 This is a schematic diagram of the back structure of the linear motor area in the present invention; Figure 8 A schematic diagram of the internal structure of the intake pipe region of the present invention; Figure 9 This is a schematic diagram of the back structure of the cover plate area in the present invention.

[0019] In the figure: 1. Processing platform; 11. Card slot; 12. Column; 13. Base; 14. Hydraulic cylinder; 2. Battery cell; 21. Connecting piece; 3. Dust cover; 31. Partition; 4. Air inlet pipe; 5. Air exhaust pipe; 6. Cleaning mechanism; 61. Motor slide; 62. Linear motor; 63. First fixed block; 64. First slide; 65. First slider; 66. Cleaning brush; 67. Curved slide; 68. Spherical top block; 69. Telescopic rod; 610. First roller; 61 1. First spring; 7. Laser; 8. Vibration mechanism; 81. Second fixed block; 82. Slide rod; 83. Limit block; 84. Second spring; 85. Percussion hammer; 86. Trapezoidal top block; 87. Triangular top block; 88. Bracket; 89. Second roller; 9. Unclogging mechanism; 91. Filter; 92. Screw; 93. Threaded sleeve; 94. Movable block; 95. Brush; 96. Ejector pin; 97. Dust box; 98. Second slide; 99. Cover plate; 910. Push plate. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-9 One embodiment of the present invention is: a battery cell connecting piece welding mechanism, including a processing platform 1, and also including: Two battery cells 2 are arranged above the processing platform 1; A connecting piece 21 is provided between two battery cells 2; The card slot 11 is provided on the top of the processing platform 1 and is used to limit the two battery cells 2; The dust cover 3 is provided above the processing platform 1 and is used to provide a closed space for the connecting piece 21 during the welding process; A partition 31 is provided inside the dust cover 3; The space between the two partitions 31 forms a welding chamber; The air inlet pipe 4 is provided on the back of the dust removal cover 3 and is used to connect to an external air pump to blow air into the welding chamber; The exhaust pipe 5 is provided on the front of the dust removal cover 3 and is used to connect an external vacuum cleaner to suck out the welding slag in the welding chamber; Two lasers 7 are provided inside the welding chamber and are used to perform laser welding on the two battery cells 2 and the connecting piece 21; A cleaning mechanism 6 is provided inside the welding chamber and is used to clean the welding slag generated by the laser 7 during welding; Wherein, the cleaning mechanism 6 comprises: A linear motor 62 is provided inside the welding chamber and is used to drive the two lasers 7 to move; The motor slide rail 61 is provided inside the welding chamber and is used to limit the movement of the linear motor 62; Two lasers 7 are arranged on both sides of the linear motor 62; The left and right sides of the dust hood 3 are fixedly connected with columns 12, the bottom of the columns 12 is fixedly connected with a base 13, the top of the base 13 is fixedly connected with a hydraulic cylinder 14, and the top of the hydraulic cylinder 14 is fixedly connected to the bottom of the processing platform 1.

[0022] The bottom of the linear motor 62 is fixedly connected to a first fixed block 63, and a first slide groove 64 is provided on the front of the first fixed block 63. The interior of the first slide groove 64 is slidably connected to a first slider 65 through a linear bearing. The linear bearing is provided to limit the first slider 65 to slide only in the left and right directions. A cleaning brush 66 is fixedly connected to the front of the first slider 65, and the cleaning brush 66 is in contact with the connecting piece 21.

[0023] A curved slide rail 67 is provided on the left partition 31, and a spherical top block 68 is fixedly connected to the cleaning brush 66 through a connecting rod. The spherical top block 68 is slidably connected to the curved slide rail 67. A telescopic rod 69 is fixedly connected to the right side of the cleaning brush 66, and the right end of the telescopic rod 69 is fixedly connected to the first roller 610. The first roller 610 is slidably connected to the right partition 31. A first spring 611 is provided on the outer side of the telescopic rod 69, and the left end of the first spring 611 is fixedly connected to the cleaning brush 66. The right end of the first spring 611 is fixedly connected to the first roller 610. The cleaning brush 66 is restricted from moving back and forth left and right during the forward and backward movement by the curved slide rail 67 and the first spring 611.

[0024] Working principle: First, place the two battery cells 2 in the slot 11, then install the connecting piece 21 between the two battery cells 2, and then turn on the hydraulic cylinder 14 to drive the processing platform 1 to move upward and fit it with the bottom of the dust cover 3. Then turn on the linear motor 62 to drive the two lasers 7 to move from front to back, and at the same time turn on the laser 7 to perform laser welding on the battery cells 2 and the connecting piece 21. In the process of moving backward, the linear motor 62 drives the first fixed block 63 to move backward. When the first fixed block 63 moves backward, it drives the first slider 65 to move backward through the linear bearing. The backward movement of the first slider 65 drives the cleaning brush 66 to move backward and cleans the welding slag on the welding point, thereby improving the welding effect. The cleaning brush 66 moves backward and drives the spherical top block 68 to move backward through the connecting rod. In the process of the spherical top block 68 moving backward, it will be pushed to the right under the action of the curved slide rail 67 and move to the left under the action of the first spring 611. This repeatedly drives the spherical top block 68, the connecting rod and the cleaning brush 66 to move left and right. In the process of the cleaning brush 66 moving left and right, the welding slag on the welding points on both sides can be evenly cleaned, thereby further improving the cleaning effect of the welding slag.

[0025] See also Figure 1-9 On the basis of the above embodiment, in another embodiment of the present invention, a vibration mechanism 8 is provided on the back of the linear motor 62, and the vibration mechanism 8 includes two second fixed blocks 81, which are fixedly connected to the back of the first fixed block 63. The two second fixed blocks 81 are respectively arranged on the left and right sides of the first slide groove 64. A hole is opened on the top of the second fixed block 81, and a sliding rod 82 slides through the hole through a linear bearing. A knocking hammer 85 is fixedly connected to the bottom of the sliding rod 82, and the vibration generated by the knocking hammer 85 hitting the connecting piece 21 eliminates the residual stress generated by welding.

[0026] The top end of the slide bar 82 is fixedly connected to the limit block 83, and the outer sleeve of the slide bar 82 is provided with a second spring 84. The top end of the second spring 84 is fixedly connected to the limit block 83, and the bottom end of the second spring 84 is fixedly connected to the second fixed block 81. The second spring 84 is provided to drive the slide bar 82 to rebound, and the back side of the slide bar 82 is fixedly connected to the triangular top block 87. The rear end of the first slider 65 is fixedly connected to the trapezoidal top block 86. The trapezoidal top block 86 is in contact with the two triangular top blocks 87. The trapezoidal top block 86 moves left and right to drive the triangular top block 87, the slide bar 82 and the knocking hammer 85 to move upward.

[0027] Two brackets 88 are fixedly connected to the bottom of the first slider 65, and a second roller 89 is provided between the two brackets 88. The second roller 89 is slidably connected to the connecting piece 21. When the second roller 89 rolls on the surface of the connecting piece 21, it will apply a certain pressure to it, thereby eliminating the residual stress on its surface.

[0028] Working principle: When the laser 7 completes the laser welding of the battery cell 2 and the connecting piece 21, the linear motor 62 is turned on and moved from back to front to reset. The linear motor 62 moves forward to drive the first fixed block 63 to move forward. The first fixed block 63 moves forward to drive the first slider 65 to move forward. In the process of the first slider 65 moving forward, it moves left and right under the action of the curved slide rail 67, the connecting rod and the spherical top block 68. The first slider 65 moves left and right to drive the trapezoidal top block 86 to move left and right. In the process of the trapezoidal top block 86 moving left and right, it contacts the triangular top block 87 and pushes the triangular top block 87 upward. The triangular top block 87 moves upward to drive the slide bar 82 to move upward and stretch the second spring 84. Then, under the action of the rebound force of the second spring 84, the slide bar 82 and the knocking hammer 85 move downward and knock the connecting piece 21. The residual stress generated by the welding is eliminated by the vibration generated by the knocking hammer 85 knocking on the connecting piece 21. When the first slider 65 moves forward, it drives the second roller 89 on the connecting piece 21. When the second roller 89 rolls on the surface of the connecting piece 21, it applies a certain pressure to it, thereby further eliminating the residual stress on its surface.

[0029] See also Figure 1-9 On the basis of the above embodiment, in another embodiment of the present invention, a dredging mechanism 9 is provided inside the air intake pipe 4, and the dredging mechanism 9 includes a filter screen 91, which is fixedly connected to the inside of the air intake pipe 4. The air entering the welding chamber is filtered by setting the filter screen 91. A threaded sleeve 93 is fixedly connected to the middle part of the filter screen 91. The internal thread of the threaded sleeve 93 is connected to a screw rod 92. The front end of the screw rod 92 is rotatably connected to the linear motor 62, and the rear end of the screw rod 92 is fixedly connected to a movable block 94. A brush 95 is provided on the outside of the movable block 94. The brush 95 contacts the inner wall of the air intake pipe 4. By setting the brush 95, impurities adhered to the inner wall of the air intake pipe 4 are cleaned, thereby improving the patency of the air intake pipe 4.

[0030] A thimble 96 is fixedly connected to the front of the movable block 94 . The thimble 96 contacts the filter screen 91 , and the clogged filter holes on the filter screen 91 are cleared by the thimble 96 .

[0031] The interior of the dust cover 3 is fixedly connected to a dust box 97, and a second slide groove 98 is provided inside the dust box 97. The interior of the second slide groove 98 is slidably connected to a cover plate 99 through a second slider. An elastic pull rope is provided between the back side of the cover plate 99 and the filter screen 91. The top of the cover plate 99 is fixedly connected to a push plate 910, and the push plate 910 is in contact with the ejector pin 96.

[0032] Working principle: The linear motor 62 drives the screw rod 92 to move forward and backward during the movement of the linear motor 62. When the screw rod 92 moves forward and backward, it rotates under the action of the threaded sleeve 93, thereby driving the movable block 94 to move forward and backward while rotating, and cleans the impurities adhering to the inner wall of the air intake pipe 4 through the bristles 95, thereby improving the patency of the air intake pipe 4. The movable block 94 will drive the ejector pin 96 to move forward during the forward movement of the movable block 94. The ejector pin 96 will contact the filter screen 91 during the forward movement and pass through the blocked filter holes on the filter screen 91 to dredge the filter holes of the filter screen 91. After the ejector pin 96 passes through the filter holes of the filter screen 91, it will push the push plate 910 and the cover plate 99 forward and stretch the elastic pull rope. At this time, the impurities pushed out of the filter holes will fall into the dust collection box 97, and then the cover plate 99 will return to its position to cover the dust collection box 97 under the action of the elastic pull rope.

[0033] The present invention provides a battery cell connector welding mechanism. There are numerous methods and approaches for implementing this technical solution. The foregoing merely represents a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Any components not specified in this embodiment may be implemented using existing technologies.

Claims

1. A battery cell connecting piece welding mechanism, characterized in that: A battery cell connecting piece welding mechanism, comprising a processing platform (1), and further comprising: Two battery cells (2) are arranged above the processing platform (1); A connecting piece (21) is provided between the two battery cells (2); A card slot (11) is provided on the top of the processing platform (1) and is used to limit the position of the two battery cells (2); A dust removal cover (3) is provided above the processing platform (1) and is used to provide a closed space for the connecting piece (21) during the welding process; A partition (31) is arranged inside the dust removal cover (3); The space between the two partitions (31) forms a welding chamber; An air inlet pipe (4) is provided on the back of the dust removal cover (3) and is used to connect to an external air pump to blow air into the welding chamber; An exhaust pipe (5) is provided on the front of the dust removal cover (3) and is used to connect to an external vacuum cleaner to suck out welding slag in the welding chamber; Two lasers (7) are arranged inside the welding chamber and are used to perform laser welding on the two battery cells (2) and the connecting piece (21); A cleaning mechanism (6) is provided inside the welding chamber and is used to clean welding slag generated by the laser (7); Among them, the cleaning agencies (6) include: A linear motor (62) is provided inside the welding chamber and is used to drive the two lasers (7) to move; A motor slide rail (61) is provided inside the welding chamber and is used to limit the movement of the linear motor (62); The two lasers (7) are arranged on both sides of the linear motor (62); The left and right sides of the dust removal hood (3) are fixedly connected to upright posts (12), the bottom of the upright posts (12) is fixedly connected to a base (13), the top of the base (13) is fixedly connected to a hydraulic cylinder (14), and the top end of the hydraulic cylinder (14) is fixedly connected to the bottom of the processing platform (1).

2. The battery cell connecting piece welding mechanism according to claim 1, characterized in that: The bottom of the linear motor (62) is fixedly connected to a first fixed block (63), the front of the first fixed block (63) is penetrated by a first slide groove (64), the interior of the first slide groove (64) is slidably connected to a first slider (65) via a linear bearing, the front of the first slider (65) is fixedly connected to a cleaning brush (66), and the cleaning brush (66) is in contact with the connecting piece (21).

3. The battery cell connecting piece welding mechanism according to claim 2, characterized in that: A curved slide rail (67) is provided on the left side of the partition (31), a spherical top block (68) is fixedly connected to the cleaning brush (66) through a connecting rod, the spherical top block (68) is slidably connected to the curved slide rail (67), a telescopic rod (69) is fixedly connected to the right side of the cleaning brush (66), the right end of the telescopic rod (69) is fixedly connected to the first roller (610), the first roller (610) is slidably connected to the right side of the partition (31), the outer sleeve of the telescopic rod (69) is provided with a first spring (611), the left end of the first spring (611) is fixedly connected to the cleaning brush (66), and the right end of the first spring (611) is fixedly connected to the first roller (610).

4. The battery cell connecting piece welding mechanism according to claim 3, characterized in that: A vibration mechanism (8) is provided on the back of the linear motor (62), and the vibration mechanism (8) includes two second fixed blocks (81), the two second fixed blocks (81) are fixedly connected to the back of the first fixed block (63), and the two second fixed blocks (81) are respectively provided on the left and right sides of the first slide groove (64), and a hole is provided on the top of the second fixed block (81), and a slide rod (82) is slidably passed through the hole through a linear bearing, and a knocking hammer (85) is fixedly connected to the bottom of the slide rod (82).

5. The battery cell connecting piece welding mechanism according to claim 4, characterized in that: The top end of the slide bar (82) is fixedly connected to the limit block (83), the outer portion of the slide bar (82) is provided with a second spring (84), the top end of the second spring (84) is fixedly connected to the limit block (83), the bottom end of the second spring (84) is fixedly connected to the second fixed block (81), the back end of the slide bar (82) is fixedly connected to a triangular top block (87), the rear end of the first slider (65) is fixedly connected to a trapezoidal top block (86), and the trapezoidal top block (86) is in contact with two triangular top blocks (87).

6. The battery cell connecting piece welding mechanism according to claim 5, characterized in that: The bottom of the first slider (65) is fixedly connected to two brackets (88), and a second roller (89) is provided between the two brackets (88). The second roller (89) is slidably connected to the connecting piece (21). When the second roller 89 rolls on the surface of the connecting piece 21, it applies a certain pressure to the connecting piece 21, thereby eliminating residual stress on the surface.

7. The battery cell connecting piece welding mechanism according to claim 6, characterized in that: A dredging mechanism (9) is provided inside the air intake pipe (4), and the dredging mechanism (9) includes a filter screen (91), the filter screen (91) is fixedly connected to the inside of the air intake pipe (4), a threaded sleeve (93) is fixedly connected to the middle part of the filter screen (91), the internal thread of the threaded sleeve (93) is connected to a screw rod (92), the front end of the screw rod (92) is rotatably connected to the linear motor (62), the rear end of the screw rod (92) is fixedly connected to a movable block (94), and the outside of the movable block (94) is provided with bristles (95), and the bristles (95) are in contact with the inner wall of the air intake pipe (4).

8. The battery cell connecting piece welding mechanism according to claim 7, characterized in that: A thimble (96) is fixedly connected to the front of the movable block (94), and the thimble (96) is in contact with the filter screen (91).

9. The battery cell connecting piece welding mechanism according to claim 8, characterized in that: The interior of the dust collecting cover (3) is fixedly connected to a dust collecting box (97), a second slide groove (98) is provided inside the dust collecting box (97), the interior of the second slide groove (98) is slidably connected to a cover plate (99) via a second slider, an elastic drawstring is provided between the back of the cover plate (99) and the filter screen (91), a push plate (910) is fixedly connected to the top of the cover plate (99), and the push plate (910) is in contact with the ejector pin (96).

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