Lithium battery cover welding equipment and working method

Abstract

The invention relates to lithium battery cover welding equipment and a working method, and the lithium battery cover welding equipment comprises a rack and a circulating conveying line which is arranged on the rack and is used for conveying batteries, the feeding mechanism, the first tab alignment mechanism, the tab wiping mechanism, the tab welding mechanism, the drawing testing mechanism, the discharging mechanism and the multi-station transmission mechanism are sequentially arranged on the circulating conveying line in the battery conveying direction; the multi-station transmission mechanism comprises a driving unit, a driving shaft connected with the driving unit, a first transmission assembly, a second transmission assembly, a third transmission assembly and a fourth transmission assembly, and the driving unit drives the driving shaft to rotate. The first transmission assembly, the second transmission assembly, the third transmission assembly and the fourth transmission assembly drive the first tab alignment mechanism, the tab wiping mechanism, the tab welding mechanism and the drawing testing mechanism to act periodically. Linkage production can be achieved among all procedures, and the equipment efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of lithium battery production equipment, and in particular to a lithium battery cover welding device and a working method. Background Art

[0002] Lithium batteries are widely used in electronic devices in various fields of life due to their high energy density and long service life. In the production process of cylindrical lithium batteries, after the battery cell is loaded into the shell, the battery cell's tabs and caps need to be welded together, and then the caps are pressed onto the ends of the battery after welding to seal the cylindrical lithium battery. There are many processing steps involved, such as tab alignment, tab wiping, tab welding, and pull-out testing. In order to improve efficiency, the prior art uses fully automatic equipment to achieve automated linkage processing of each process, but the mechanical motion between each process is independently controlled, such as using a cylinder or electric cylinder to control linear or rotational motion. The equipment has low integration and cannot achieve linkage processing between processes, resulting in low equipment processing efficiency and output. Summary of the invention

[0003] The object of the present invention is to provide a lithium battery cover welding device and a working method, in which various processes can be linked to each other to improve equipment efficiency.

[0004] A lithium battery cap welding device comprises a frame, a circulating conveyor line arranged on the frame for conveying batteries, and also comprises a loading mechanism, a first tab alignment mechanism, a tab wiping mechanism, a tab welding mechanism, a drawing test mechanism, a feeding mechanism and a multi-station transmission mechanism arranged on the circulating conveyor line in sequence along the battery conveying direction; The multi-station transmission mechanism includes a driving unit, a driving shaft connected to the driving unit, a first transmission assembly, a second transmission assembly, a third transmission assembly, and a fourth transmission assembly. The driving unit drives the driving shaft to rotate, and then drives the first tab alignment mechanism, the tab wiping mechanism, the tab welding mechanism and the pulling test mechanism to perform periodic actions respectively through the first transmission assembly, the second transmission assembly, the third transmission assembly and the fourth transmission assembly.

[0005] The lithium battery cap welding equipment designed in this scheme realizes the fully automatic production of batteries. The batteries to be processed are transferred to the circulating conveyor line through the loading mechanism. The batteries between the mechanisms are transferred and accurately positioned through the circulating conveyor line. The finished batteries are transferred off the line through the unloading mechanism. In addition, the first tab alignment mechanism, the tab wiping mechanism, the tab welding mechanism and the pulling test mechanism are linked to realize the coordinated processing between the processes through the multi-station transmission mechanism. Specifically, a driving unit is used to drive the driving shaft to rotate, and then the corresponding transmission components are used to realize the corresponding periodic actions of each mechanism to complete the processing of each process and improve the equipment efficiency. At the same time, the mechanical structure is used to replace the electronic control program to realize the linkage control of each mechanism, and the overall stability is better.

[0006] Furthermore, the tab wiping mechanism includes a clamping assembly, the second transmission assembly includes at least one second driving wheel sleeved on the driving shaft, and a first clamping transmission unit and a second clamping transmission unit connected to the clamping assembly, at least one of the second driving wheels is provided with a first track portion and a second track portion, and the first clamping transmission unit and the second clamping transmission unit are respectively connected to the first track portion and the second track portion.

[0007] The first track portion and the second track portion of the second driving wheel respectively drive the first clamping transmission unit and the second clamping transmission unit to move periodically, thereby realizing the linkage control of the clamping assembly. After the battery tab reaches the specified position, the first track portion drives the clamping assembly to approach the tab through the first clamping transmission unit, and the second track portion drives the clamping unit to clamp the tab through the second clamping transmission unit. After completing this action process, the first clamping transmission unit drives the clamping assembly to rise and detach from the tab, and the second clamping transmission unit drives the clamping assembly to open again.

[0008] Furthermore, the tab welding mechanism includes a battery lifting assembly, a cap pushing assembly and a clamping assembly, and the third transmission assembly includes at least one third driving wheel sleeved on the driving shaft, and a first lifting transmission unit, a second pushing transmission unit and a third clamping transmission unit respectively connected to the battery lifting assembly, the cap pushing assembly and the clamping assembly; at least one of the third driving wheels is provided with a third track portion, a fourth track portion and a fifth track portion, and the first lifting transmission unit, the second pushing transmission unit and the third clamping transmission unit are respectively connected to the third track portion, the fourth track portion and the fifth track portion.

[0009] By designing the track paths and running timing of the third track part, the fourth track part and the fifth track part of the third driving wheel, the first lifting transmission unit, the second pushing transmission unit and the third pressing transmission unit respectively control the welding device to complete the actions of positioning the pole ear, pushing the cap, and pressing the pole ear and the cap together. The third track part drives the battery lifting assembly to lift the battery through the first lifting transmission unit so that the pole ear reaches the pressing position. In this process, the fourth track part drives the cap pushing assembly to push the cap through the second pushing transmission unit. When the pole ear reaches the pressing position, the cap is matched with the pole ear. Synchronously, the fifth track part drives the pressing assembly to move through the third pressing transmission unit, and cooperates with the cap pushing assembly to squeeze, so that the cap and the pole ear are pressed together. Each action process is closely connected, and the parallel action method is fully utilized to save invalid waiting time, so as to shorten the processing time and improve the welding efficiency. Furthermore, the tab wiping mechanism and / or the tab welding mechanism is provided with a clutch unit, which includes a base, a sliding seat slidably arranged on the base, a slider slidably arranged under the sliding seat, a rotating block rotatably arranged between the sliding seat and the slider, a claw rotatably arranged on the base, and a sliding driving member driven and connected to the slider; the sliding seat is connected to the multi-station transmission mechanism, one end of the rotating block is movably engaged with the sliding seat, and the other end is abutted against the slider; the sliding driving member can drive the slider to reciprocate to drive the rotating block to rotate, so that the rotating block is separated or engaged with the sliding seat.

[0010] The clutch unit is used to unload the force of the mechanical transmission. When the rotating block is engaged with the sliding seat, the sliding seat cannot move, and the transmission unit connected to the sliding seat can operate normally. When the rotating block is separated from the sliding seat, the sliding seat can move. When the transmission unit operates, the sliding seat moves so that the transmission unit cannot operate normally. When cleaning the pole ear, if the battery pole ear is skewed, the clutch unit can be used to control the second clamping transmission unit to be unable to transmit, thereby keeping the clamping assembly in an open state, and not performing cleaning actions on the battery, thereby avoiding pinching the pole ear and wasting cleaning paper tape. When welding the pole ear, if the battery pole ear is skewed, the clutch unit can be used to control the second push transmission unit to be unable to transmit, thereby making it impossible for the cap push assembly to push the cap and the pole ear together, and the two cannot be welded, thereby avoiding defective welding products.

[0011] Furthermore, the first tab alignment mechanism includes a tab position sensing component, a battery rolling component, and a battery rolling support component; the first transmission component includes a first driving wheel, a first induction transmission unit, and a second support transmission unit mounted on the driving shaft, the first driving wheel is provided with a sixth track portion, and the first induction transmission unit and the second support transmission unit are connected to the sixth track portion.

[0012] The first induction transmission unit and the second support transmission unit are driven to move periodically through the sixth track portion of the first driving wheel to realize the linkage control of the tab position sensing assembly, the battery rolling assembly and the battery rolling support assembly. When the battery moves to the first tab alignment mechanism, the first induction transmission unit drives the tab position sensing assembly to descend to the position relative to the tab, and at the same time drives the battery rolling assembly to contact the side of the battery, and the second support transmission unit drives the battery rolling support assembly to contact the side of the battery, and the battery rolling assembly drives the battery to rotate to adjust the angle of the tab, and when the tab position sensing assembly confirms that the tab position is adjusted to the preset position, the battery rolling assembly stops driving the battery to rotate to realize the correction of the tab.

[0013] It further includes a second tab alignment mechanism, which is located between the tab wiping mechanism and the tab welding mechanism.

[0014] A second tab alignment mechanism is provided downstream of the tab wiping mechanism to correct the tab after wiping again, so as to avoid deviation of the tab position due to abnormal wiping or abnormal conveying process, which may cause poor welding after the battery is conveyed to the tab welding mechanism.

[0015] Furthermore, the pulling test mechanism includes a clamping and stretching assembly, the fourth transmission assembly includes a fourth driving wheel sleeved on the driving shaft, and a first stretching transmission unit connected to the clamping and stretching assembly, the fourth driving wheel is provided with a seventh track portion, and the first stretching transmission unit is connected to the seventh track portion.

[0016] After the tab and the cap are welded, the strength of the welding is tested by the pull test mechanism. When the welded battery is moved to the pull test mechanism, the fourth drive wheel drives the clamping and stretching assembly to descend through the first stretching transmission unit, and clamps the cap to perform a tensile test according to the preset tensile force. If the cap is not broken under the set tensile force value, the battery is qualified. If the cap is broken, the battery is unqualified.

[0017] Furthermore, it also includes a welding point detection mechanism, a tab bending mechanism, and a cap closing mechanism; the welding point detection mechanism is located between the tab welding mechanism and the pulling test mechanism, and is used to detect the position of the cap welding point; the tab bending mechanism is located downstream of the pulling test mechanism, and is used to bend the tab and preliminarily close the cap on the battery end; the cap closing mechanism is located downstream of the tab bending mechanism, and is used to press the cap to the battery end.

[0018] A welding spot detection mechanism is set between the tab welding mechanism and the pulling test mechanism, and the position of the cap welding spot is detected in real time by a CCD camera module, and it is judged whether the position of the cap welding spot is qualified to avoid the outflow of defective products; in addition, a tab bending mechanism and a cap closing mechanism are set to press-fit the cap of the battery with the tab welded, so as to improve the integration of the equipment.

[0019] Furthermore, it also includes a first defective rejection mechanism and a second defective rejection mechanism; the first defective rejection mechanism is located between the tab wiping mechanism and the tab welding mechanism; the second defective rejection mechanism is located between the pulling test mechanism and the tab bending mechanism.

[0020] By setting up a first defective rejection mechanism, batteries with poor tab alignment are rejected from the circulating conveyor line before tab welding to prevent them from flowing to the subsequent process, thereby intercepting defective work-in-progress from the process; by setting up a second defective rejection mechanism, defective welded products are rejected from the circulating conveyor line to prevent them from flowing out, and the rejected defective products are repaired to reduce defective waste.

[0021] A working method of a lithium battery cover welding device, using the above-mentioned lithium battery cover welding device, specifically comprises the following steps: S1: The batteries to be processed are automatically transferred to the circulation conveyor line through the loading mechanism; S2: Rotate and adjust the battery position angle on the circulating conveyor line through the first tab alignment mechanism so that the tab of the battery is at a preset position angle; S3: The tab is clamped by the clamping assembly of the tab wiping mechanism and pulled up, so that the cleaning paper tape on the clamping assembly rubs against the tab to clean the tab; S4: The first defective rejection mechanism transfers the batteries that have not been aligned by the first tab alignment mechanism from the circulation conveying line to the defective temporary storage line; S5: Rotate and adjust the battery position angle on the circulating conveyor line through the second tab alignment mechanism so that the tab of the battery is at a preset position angle; S6: The tab welding mechanism transports the cap and presses the cap and the tab together, and welds the cap and the tab together through a laser; S7: Detect the position of the cap soldering point in real time through the CCD camera module of the soldering point detection mechanism, and determine whether the position of the cap soldering point is qualified; S8: clamp the cap by the clamping and tensile assembly of the pull test mechanism to perform a tensile test; S9: The batteries that fail the tensile test are transferred from the circulation conveying line to the defective temporary storage line through the second defective rejection mechanism; S10: bending the tabs of the qualified battery by the tab bending mechanism, and initially closing the caps to the ends of the battery; S11: Pressing the cap into the end of the battery through the cover closing mechanism to form a finished battery; S12: The finished battery is transferred off the circulating conveyor line through the unloading mechanism.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the lithium battery cap welding equipment designed in this scheme realizes the fully automatic production of batteries, the batteries to be processed are transferred to the circulating conveyor line through the loading mechanism, the batteries between the mechanisms are transferred and accurately positioned through the circulating conveyor line, and the finished batteries are transferred off the line through the unloading mechanism. In addition, the first tab alignment mechanism, the tab wiping mechanism, the tab welding mechanism and the pulling test mechanism are linked to realize the coordinated processing between the processes through the multi-station transmission mechanism. Specifically, a driving unit is used to drive the driving shaft to rotate, and then the corresponding transmission components are used to realize the corresponding periodic actions of each mechanism, complete the processing of each process, and improve the equipment efficiency. At the same time, the linkage control of each mechanism is realized by replacing the electronic control program with a mechanical structure, and the overall stability is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of a lithium battery cover welding device according to an embodiment of the present invention.

[0024] Figure 2 for Figure 1 Top view of the .

[0025] Figure 3 It is a schematic structural diagram of the bottom of the lithium battery cover welding equipment according to an embodiment of the present invention.

[0026] Figure 4 It is a structural schematic diagram of a feeding mechanism according to an embodiment of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the first tab alignment mechanism according to an embodiment of the present invention.

[0028] Figure 6 for Figure 5 main view.

[0029] Figure 7 Schematic diagram of the structure of the tab wiping mechanism according to an embodiment of the present invention.

[0030] Figure 8 for Figure 7 main view.

[0031] Fig. 9 for Figure 8 A is an enlarged view of the middle image.

[0032] Fig.10 Schematic diagram of the structure of a clutch unit according to an embodiment of the present invention.

[0033] Fig.11 Schematic diagram of the structure of the first defective rejection mechanism according to an embodiment of the present invention.

[0034] Fig.12 Schematic diagram of the structure of the tab welding mechanism according to an embodiment of the present invention.

[0035] Fig.13 It is a schematic structural diagram of a clamping assembly according to an embodiment of the present invention.

[0036] Fig.14 for Fig.12 Enlarged view of B.

[0037] Fig.15 It is a schematic structural diagram of a first lifting transmission unit according to an embodiment of the present invention.

[0038] Fig.16 for Fig.15 main view.

[0039] Fig.17 It is a schematic structural diagram of a second push transmission unit according to an embodiment of the present invention.

[0040] Fig.18 Schematic diagram of the structure of a solder joint detection mechanism according to an embodiment of the present invention.

[0041] Fig.19 Schematic diagram of the structure of a pulling test mechanism according to an embodiment of the present invention.

[0042] Fig. 20 It is a schematic structural diagram of a tab bending mechanism according to an embodiment of the present invention.

[0043] Fig.21 Schematic diagram of the structure of the cover closing mechanism according to an embodiment of the present invention.

[0044] Fig. 22 It is a structural schematic diagram of the unloading mechanism of an embodiment of the present invention.

[0045] Description of Figure Numbers: 1. Frame; 2. Circulation conveyor line; 3. Feeding mechanism; 31. Feeding conveyor line; 32. Feeding unit; 321. Rotating drive member; 322. Chuck; 33. Pushing unit; 331. Pushing drive member; 332. Pushing fixture; 4. First pole ear alignment mechanism; 41. pole ear position sensing assembly; 42. battery rolling assembly; 421. support plate; 422. drive motor; 423. rolling wheel; 43. battery rolling support assembly; 431. first support frame; 432. support wheel; 5. Tab wiping mechanism; 51. Clamping assembly; 511. Balance wheel; 512. First clamping arm; 513. Second clamping arm; 514. Clamping claw; 515. First elastic component; 516. Second elastic component; 52. Reeling and unreeling assembly; 6. The first defective rejection mechanism; 61. Defective temporary storage line; 62. Push-down assembly; 7. Second pole ear alignment mechanism; 8. Tab welding mechanism; 81. Battery lifting assembly; 82. Cap pushing assembly; 821. First pushing unit; 8211. Push rod; 8212. Push rod driving arm; 8213. Third elastic component; 822. Second pushing unit; 8221. Push stop block; 83. Pressing assembly; 9. Solder point detection mechanism; 91. CCD camera module; 92. Backlight source; 10. Pull-out test mechanism; 101. Clamping and stretching assembly; 11. The second bad rejection mechanism; 12. Tab bending mechanism; 121. Tab bending drive member; 122. Bending block; 123. Cap pressing drive member; 124. Pressing block; 13. Cover closing mechanism; 131. Clamping assembly; 1311. Clamping drive member; 1312. Clamping block; 132. Sealing and pressing assembly; 1321. Sealing and pressing drive member; 1322. Pressing head; 14. Unloading mechanism; 141. Unloading conveyor line; 15. Multi-station transmission mechanism; 151. Drive unit; 152. Drive shaft; 153. First transmission assembly; 1531. First drive wheel; 15311. Sixth track portion; 1532. First induction transmission unit; 1533. Second support transmission unit; 154. Second transmission assembly; 1541. Second drive wheel; 15411. First track portion; 15412. Second track portion; 1542. First clamping transmission unit; 15421. First swing arm; 15422. First transmission rod unit; 1543. Second clamping transmission unit; 15431. First transmission connecting arm; 15432. Second transmission rod unit; 155. Third transmission assembly; 1551. Third driving wheel; 15511, third track portion; 15512, fourth track portion; 15513, fifth track portion; 1552, first lifting transmission unit; 15521, second swing arm; 15522, third transmission rod unit; 1553, second pushing transmission unit; 15531, fourth transmission rod unit; 15532, second transmission connecting arm; 1554, third pressing transmission unit; 15541, third transmission connecting arm; 15542, fifth transmission rod unit; 156, fourth transmission assembly; 1561, fourth driving wheel; 15611, seventh track portion; 1562, first stretching transmission unit; 15621, third swing arm; 15622, sixth transmission rod unit; 16. Clutch unit; 161. Base; 162. Sliding seat; 163. Sliding block; 164. Rotating block; 165. Clamping claw; 166. Sliding drive member. DETAILED DESCRIPTION

[0046] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The drawings show preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0047] like Figures 1 to 3As shown, the present embodiment provides a lithium battery cap welding device, including a frame 1, a circulating conveyor line 2 arranged on the frame 1 for conveying batteries, and a magnetic carrier is arranged on the circulating conveyor line 2; it also includes a feeding mechanism 3, a first tab alignment mechanism 4, a tab wiping mechanism 5, a first defective rejection mechanism 6, a second tab alignment mechanism 7, a tab welding mechanism 8, a welding point detection mechanism 9, a pulling test mechanism 10, a second defective rejection mechanism 11, a tab bending mechanism 12, a capping mechanism 13, a feeding mechanism 14 and a multi-station transmission mechanism 15, which are sequentially arranged on the circulating conveyor line 2 along the battery conveying direction; the multi-station transmission mechanism 15 includes a driving unit 151 , a driving shaft 152 connected to the driving unit 151, and a first transmission assembly 153, a second transmission assembly 154, a third transmission assembly 155 and a fourth transmission assembly 156 corresponding to the first pole ear alignment mechanism 4, the pole ear wiping mechanism 5, the pole ear welding mechanism 8, and the pulling test mechanism 10, the driving unit 151 drives the driving shaft 152 to rotate, and then drives the first pole ear alignment mechanism 4, the pole ear wiping mechanism 5, the pole ear welding mechanism 8 and the pulling test mechanism 10 through the first transmission assembly 153, the second transmission assembly 154, the third transmission assembly 155 and the fourth transmission assembly 156 to realize respective corresponding periodic actions. In this embodiment, the driving unit 151 is composed of a driving motor, a reducer and a cam divider. After the driving motor is connected to the reducer, it is connected to the cam divider through a belt, and the cam divider is connected to the driving shaft through a coupling; at the same time, the cam divider is connected to the circulating conveyor line through a turntable. Thus, the power source of the entire equipment is formed, and the stepping motion of the circulating conveyor line 2 and the cyclic processing of each mechanism are realized.

[0048] This embodiment provides a lithium battery cap welding device to realize fully automatic production of batteries. The batteries to be processed are transferred to the circulating conveyor line 2 through the loading mechanism. The circulating conveyor line 2 realizes the transfer and precise positioning of the batteries between the mechanisms. The finished batteries are transferred off the line through the unloading mechanism 14. In addition, the first tab alignment mechanism 4, the tab wiping mechanism 5, the tab welding mechanism 8 and the drawing test mechanism 10 are linked to realize collaborative processing between processes through a multi-station transmission mechanism. Specifically, a driving unit 151 is used to drive the driving shaft 152 to rotate, and then the corresponding transmission components are used to realize the corresponding periodic actions of each mechanism to complete the processing of each process and improve the equipment efficiency. At the same time, the mechanical structure is used to replace the electronic control program to realize the linkage control of each mechanism, and the overall stability is better.

[0049] like Figure 4As shown, the feeding mechanism 3 is composed of a feeding conveyor line 31, a feeding unit 32 and a pushing unit 33. The feeding conveyor line 31 is arranged beside the circulating conveyor line 2, the feeding unit 32 is arranged at the end of the feeding conveyor line 31, and the pushing unit 33 is located on the side of the feeding unit 32 opposite to the circulating conveyor line 2. The feeding unit 32 is composed of a rotating driving member 321 and a chuck 322 connected to the output end of the rotating driving member 321. The rotating driving member 321 can adopt a stepping motor; the pushing unit 33 is composed of a pushing driving member 331 and a pushing fixture 332 connected to the output end of the pushing driving member 331. The pushing driving member 331 can adopt a driving cylinder; when the feeding conveyor line 31 pushes the battery into the clamping position of the chuck 322, the rotating driving member 321 can drive the chuck 322 to rotate so that the battery is facing the magnetic carrier on the circulating conveyor line 2; then the pushing driving member 331 drives the pushing fixture 332 to pass through the chuck 322 to contact the battery, and push the battery to the magnetic carrier of the circulating conveyor line 2. In this embodiment, the feeding mechanism 3 can push two batteries into the circulating conveyor line 2 at a time.

[0050] like Figure 5 to Figure 6As shown, the first tab alignment mechanism 4 includes a first bracket, a second bracket, a tab position sensing assembly 41 arranged on the first bracket, a battery rolling assembly 42 slidably arranged on the first bracket, and a battery rolling support assembly 43 slidably arranged on the second bracket; the first bracket and the second bracket are respectively located on both sides of the circulating conveyor line 2. The battery rolling assembly 42 includes a support plate 421, a driving motor 422 arranged on the support plate 421, and a rolling wheel 423 connected to the output end of the driving motor 422. The support plate 421 is arranged on the first bracket through a linear slide rail, and the rolling wheel 423 can contact the side of the battery and drive the battery to rotate under the drive of the driving motor 422. The battery rolling support assembly 43 includes a first support frame 431, which is arranged on the second bracket through a linear slide rail. Two groups of support wheels 432 are arranged in parallel at the end of the first support frame 431. The support wheel 432 can cooperate with the rolling wheel 423 to clamp the battery from both sides of the battery and drive the battery to rotate. The first transmission assembly 153 includes a first driving wheel 1531 sleeved on the driving shaft 152, and a first induction transmission unit 1532 and a second support transmission unit 1533 respectively connected to the pole ear position sensing assembly 41 and the battery rolling support assembly 43. The first induction transmission unit 1532 and the second support transmission unit 1533 are composed of a plurality of transmission blocks and transmission rods, and force transmission and force reversing are realized through the transmission blocks and transmission rods; the first driving wheel 1531 is provided with a sixth track portion 15311. When the first driving wheel 1531 is a round wheel, the sixth track portion 15311 is a track groove opened on the side of the first driving wheel 1531. When the first driving wheel 1531 is a cam, the sixth track portion 15311 is the contour surface of the cam. The motion path of the sixth track portion 15311 is designed according to the required operating sequence. The first inductive transmission unit 1532 and the second supporting transmission unit 1533 are connected to the sixth track portion 15311. Specifically, a transmission shaft is arranged beside the driving shaft 152, and the first inductive transmission unit 1532 and the second supporting transmission unit 1533 are both connected to the transmission shaft. A driving connecting block which is transmission-connected to the sixth track portion 15311 is arranged at the end of the transmission shaft, and a pulley is arranged at the end of the driving connecting block, and the pulley and the sixth track portion 15311 are rollingly matched.The first driving wheel 1531 rotates to make the sixth track part 15311 rotate synchronously. The sixth track part 15311 drives the transmission shaft to rotate through the driving connection block, and then the transmission shaft drives the first induction transmission unit 1532 and the second support transmission unit 1533 to move periodically; the first induction transmission unit 1532 drives the pole ear position sensing component 41 to rise and fall periodically, and the battery rolling component 42 can also be connected to the first induction transmission unit 1532 through the transmission block. During the periodic rise and fall of the pole ear position sensing component 41, the first induction transmission unit 1532 synchronously drives the battery rolling component 42 to periodically contact and separate from the side of the battery; the sixth track part 15311 drives the battery rolling support component 43 to periodically contact and separate from the side of the battery through the second support transmission unit 1533; the battery rolling component 42 drives the battery to rotate to adjust the pole ear position angle. The first inductive transmission unit 1532 and the second supporting transmission unit 1533 are driven to move periodically through the sixth track portion 15311 of the first driving wheel 1531, so as to realize the linkage control of the tab position sensing assembly 41, the battery rolling assembly 42 and the battery rolling support assembly 43. When the battery moves to the first tab alignment mechanism 4, the first inductive transmission unit 1532 drives the tab position sensing assembly 41 to descend to the position relative to the tab, and at the same time drives the battery rolling assembly 42 to contact the side of the battery, and the second supporting transmission unit 1533 drives the battery rolling support assembly 43 to contact the side of the battery, and the battery rolling assembly 42 drives the battery to rotate and adjust the angle of the tab. When the tab position sensing assembly 41 confirms that the tab position is adjusted to the preset position, the battery rolling assembly 42 stops driving the battery to rotate, so as to realize the correction of the tab. In this embodiment, the tab position sensing assembly 41, the battery rolling assembly 42 and the battery rolling support assembly 43 are arranged in two groups, so that the tabs of two batteries can be corrected at the same time.

[0051] like Figures 7 to 10As shown, the tab wiping mechanism 5 includes a clamping assembly 51, which is mounted on a bracket through a linear guide rail; the second transmission assembly 154 includes at least one second driving wheel 1541 sleeved on the driving shaft 152, and a first clamping transmission unit 1542 and a second clamping transmission unit 1543 connected to the clamping assembly 51, at least one second driving wheel 1541 is provided with a first track portion 15411 and a second track portion 15412, and the first track portion 15411 and the second track portion 15412 are respectively placed on two sides of the second driving wheel 1541, and two tracks can also be set. A second driving wheel 1541, a first track portion 15411 and a second track portion 15412 are respectively arranged on the two second driving wheels 1541. There are two design forms of the second driving wheel 1541. If the second driving wheel 1541 is a round wheel, the track portion is a track groove opened on the side of the round wheel. If the second driving wheel 1541 is a cam, the track portion is the contour surface of the cam. The motion path of the track portion is designed according to the required operating sequence. The first clamping transmission unit 1542 and the second clamping transmission unit 1543 are respectively connected to the first track portion 15411 and the second track portion 15412. The second driving wheel 1541 rotates to drive the first track portion 15411 and the second track portion 15412 to rotate. The first track portion 15411 drives the clamping assembly 51 to rise and fall periodically through the first clamping transmission unit 1542, and the second track portion 15412 drives the clamping assembly 51 to clamp or unclamp periodically through the second clamping transmission unit 1543. The tab wiping mechanism 5 also includes a clutch unit 16 connected to the second clamping transmission unit 1543. The clutch unit 16 can prevent the second track portion 15412 from driving the clamping assembly 51 to clamp or unclamp periodically through the second clamping transmission unit 1543. The first track portion 15411 and the second track portion 15412 drive the first clamping transmission unit 1542 and the second clamping transmission unit 1543 to move periodically, thereby realizing the linkage control of the clamping assembly 51. After the battery tab reaches the specified position, the first track portion 15411 drives the clamping assembly 51 to approach the tab through the first clamping transmission unit 1542, and the second track portion 15412 drives the clamping assembly 51 to clamp the tab through the second clamping transmission unit 1543. After completing this action process, the first clamping transmission unit 1542 drives the clamping assembly 51 to rise and detach from the tab, and the second clamping transmission unit 1543 drives the clamping assembly 51 to open again.

[0052] like Figures 7 to 10As shown, the first clamping transmission unit 1542 includes a first swing arm 15421 and a first transmission rod unit 15422. A pulley is provided at one end of the first swing arm 15421, and the pulley is connected to the first track portion 15411. The first swing arm 15421 is fixed at one end opposite to the pulley by a pin. When the second driving wheel 1541 rotates, the pulley rolls along the first track portion 15411, thereby driving the first swing arm 15421 to swing around the pin. The first swing arm 15421 is connected to the first transmission rod unit 15422, and the first swing arm 15421 drives the first transmission rod unit 15422 to move during the swinging process. Driven by the first transmission rod unit 15422, the clamping assembly 51 is lifted and lowered along the linear guide rail to achieve the effect of approaching or moving away from the pole ear. A transmission shaft is arranged beside the driving shaft, and a driving connection block that is transmission-connected to the second track portion is arranged at the end of the transmission shaft, and a pulley is arranged at the end of the driving connection block, and the pulley is rollingly matched with the second track portion 15412. The second clamping transmission unit 1543 includes a first transmission connecting arm 15431 and a second transmission rod unit 15432. The first transmission connecting arm 15431 is sleeved on the transmission shaft. When the second driving wheel 1541 rotates, the pulley rolls along the second track portion 15412, thereby driving the transmission shaft to rotate back and forth. The first transmission connecting arm 15431 reciprocates around the transmission shaft under the rotation of the transmission shaft. The second transmission rod unit 15432 is movably connected to the first transmission connecting arm 15431. Under the reciprocating swing of the first transmission connecting arm 15431, the second transmission rod unit 15432 reciprocates. The clamping assembly 51 includes a balance wheel 511, a first clamping arm 512, a second clamping arm 513, a clamping claw 514, and an elastic component. The clamping assembly 51 is provided with a second linear guide rail, and the first clamping arm 512 and the second clamping arm 513 are slidably installed on the second linear guide rail. The elastic component includes a first elastic component 515 and a second elastic component 516. One end of the first elastic component 515 is connected to the first clamping arm 512, and the other end is connected to the main body of the clamping assembly 51. One end of the second elastic component 516 is connected to the second clamping arm 513, and the other end is connected to the main body of the clamping assembly 51. The clamping claw 514 is fixed to the first clamping arm 512 and the second clamping arm 513. The second transmission rod unit 15432 is connected to the balance wheel 511 on the clamping assembly 51. Driven by the second transmission rod unit 15432, the balance wheel 511 reciprocates around its rotation axis. The first clamp arm 512 and the second clamp arm 513 are respectively located on both sides of the balance wheel 511 and are against the outer periphery of the balance wheel 511. When the balance wheel 511 rotates forward, the first clamp arm 512 and the second clamp arm 513 are driven away from each other, the clamping jaws 514 are separated, and the first elastic component 515 and the second elastic component 516 are compressed. When the balance wheel 511 rotates reversely, under the elastic force of the first elastic component 515 and the second elastic component 516, the first clamp arm 512 and the second clamp arm 513 are moved closer to each other, and the clamping jaws 514 are clamped.

[0053] like Fig.10 The clutch unit 16 includes a base 161, a sliding seat 162 slidably arranged on the base 161 and connected to the second transmission rod unit 15432, a slider 163 slidably arranged on the base 161 and located below the sliding seat 162, a rotating block 164 rotatably arranged on the base 161 and located between the sliding seat 162 and the slider 163, a claw 165 rotatably arranged on the base 161, and a sliding driving member 166 drivingly connected to the slider 163; one end of the rotating block 164 is movably engaged with the sliding seat 162, and the other end is abutted against the slider 163; the sliding driving member 166 can adopt a push-pull electromagnet, which can drive the slider 163 to move back and forth to drive the rotating block 164 to rotate, so that the rotating block 164 is separated from or engaged with the sliding seat 162. The clutch unit 16 is used to unload the force of the mechanical transmission. When the rotating block 164 is engaged with the sliding seat 162, the sliding seat 162 cannot move, and the second transmission rod unit 15432 connected to the sliding seat 162 can operate normally. When the rotating block 164 is separated from the sliding seat 162, the sliding seat 162 can move. When the second transmission rod unit 15432 operates, the sliding seat 162 moves to unload the force so that the second transmission rod unit 15432 cannot operate normally. If the battery tab of the tab wiping mechanism 5 is skewed, the second clamping transmission unit 1543 can be controlled by the clutch unit 16 to be unable to transmit, thereby keeping the clamping assembly 51 in an open state, and not performing a cleaning action on the battery, thereby avoiding clamping the tab and wasting the cleaning tape.

[0054] like Figure 7 and Figure 8 As shown, the tab wiping mechanism 5 also includes a reeling assembly 52 for conveying a cleaning tape, and a clamping assembly 51 is arranged on the feeding path of the reeling assembly 52. ​​The cleaning tape passes through the clamping jaw 514 in both directions through the rotating wheel. Under the clamping force of the clamping jaw 514, the cleaning tape can press the tab tightly; when the battery tab reaches the predetermined position, the clamping assembly 51 drives the cleaning tape to press the tab tightly, and then the clamping assembly 51 drives the cleaning tape to rise, and relative movement is generated between the tab to wipe the tab. The number of clamping assemblies 51 can be arrayed according to actual use requirements. In this embodiment, the clamping assembly 51 is set to two groups, and is connected to the first transmission rod unit 15422 through a connecting piece to achieve synchronous lifting and lowering of the two groups of clamping assemblies 51; the corresponding second transmission rod unit 15432 is set to two groups, respectively connected to the two groups of clamping assemblies 51, so as to achieve synchronous clamping and unclamping of the two groups of clamping assemblies 51; the reeling assembly 52 is set to two groups, corresponding to the two groups of clamping assemblies 51. In this embodiment, two groups of tab wiping mechanisms 5 are provided to respectively realize wet wiping and dry wiping of the tab.

[0055] like Figures 12 to 17As shown, the tab welding mechanism 8 includes a battery lifting assembly 81, a cap pushing assembly 82 and a pressing assembly 83, and the third transmission assembly 155 includes at least one third driving wheel 1551 sleeved on the driving shaft 152, and a first lifting transmission unit 1552, a second pushing transmission unit 1553 and a third pressing transmission unit 1554 respectively connected to the battery lifting assembly 81, the cap pushing assembly 82 and the pressing assembly 83; two third driving wheels 1551 are provided, one of which is a cam, which is provided with a third track portion 15511 and a fifth track portion 15513, the third track portion 15511 is a contour surface of the outer periphery of the cam, and the fifth track portion 15513 is a track groove opened on the side of the cam. The other third driving wheel 1551 is in the shape of a round wheel, which is provided with a fourth track portion 15512, and the fourth track portion 15512 is a track groove opened on the side of the round wheel. The first lifting transmission unit 1552, the second pushing transmission unit 1553 and the third pressing transmission unit 1554 are respectively connected to the third track portion 15511, the fourth track portion 15512 and the fifth track portion 15513. The third driving wheel 1551 rotates to make the third track portion 15511, the fourth track portion 15512 and the fifth track portion 15513 rotate synchronously. The third track portion 15511 drives the battery lifting assembly 81 to rise and fall periodically through the first lifting transmission unit 1552. The fourth track portion 15512 drives the cap pushing assembly 82 to push the cap periodically through the second pushing transmission unit 1553, and the fifth track portion 15513 drives the pressing assembly 83 to press and release periodically through the third pressing transmission unit 1554; the tab welding mechanism 8 also includes a clutch unit 16 connected to the second pushing transmission unit 1553, and the clutch unit 16 can prevent the fourth track portion 15512 from driving the cap pushing assembly 82 to push the cap periodically through the second pushing transmission unit 1553. By designing the track paths and operating timing of the third track portion 15511, the fourth track portion 15512 and the fifth track portion 15513, the first lifting transmission unit 1552, the second pushing transmission unit 1553 and the third pressing transmission unit 1554 respectively control the welding device to link and complete the tab positioning, cap pushing, tab and cap matching pressing and other actions. The third track part 15511 drives the battery lifting assembly 81 to lift the battery through the first lifting transmission unit 1552, so that the pole ear reaches the clamping position. In this process, the fourth track part 15512 drives the cap pushing assembly 82 to push the cap through the second pushing transmission unit 1553, and when the pole ear reaches the clamping position, the cap is matched with the pole ear. Synchronously, the fifth track part 15513 drives the clamping assembly 83 to move through the third clamping transmission unit 1554, and cooperates with the cap pushing assembly to squeeze, and the cap and the pole ear are matched and clamped. Each action process is closely connected, and the parallel action method is fully utilized to save invalid waiting time, so as to shorten the processing time and improve the welding efficiency.In addition, if the battery tab is skewed, the clutch unit 16 can be used to control the second push transmission unit 1553 to be unable to transmit, thereby making it impossible for the cap pushing assembly 82 to push the cap and the tab together, so that the two cannot be welded together, thereby avoiding defective welding products.

[0056] like Fig.15 and Fig.16 As shown, the first lifting transmission unit 1552 includes a second swing arm 15521 and a third transmission rod unit 15522. A pulley is provided at the end of the second swing arm 15521. The other end of the second swing arm 15521 is fixed by a pin shaft and elastically connected to the fixing mechanism by a spring. The pulley is connected to the third track portion 15511. When the third driving wheel 1551 rotates, the pulley rolls along the track path of the third track portion 15511, thereby driving the second swing arm 15521 to swing periodically around the pin shaft. The second swing arm 15521 is movably connected to the third transmission rod unit 15522 through a connecting member. During the swinging process of the second swing arm 15521, the third transmission rod unit 15522 is driven to perform periodic motion. The third transmission rod unit 15522 is connected to the battery lifting assembly 81. Under the drive of the third transmission rod unit 15522, when the battery reaches the lifting position, the battery lifting assembly 81 lifts the battery so that the tab reaches the clamping position, and then the battery lifting assembly 81 is lowered. A transmission shaft is arranged beside the driving shaft 152, and a driving connection block is arranged at the end of the transmission shaft and is transmission-connected with the fourth track part 15512, and a pulley is arranged at the end of the driving connection block, and the pulley rolls with the fourth track part 15512. The second push transmission unit 1553 includes a fourth transmission rod unit 15531 and a second transmission connection arm 15532. The third driving wheel 1551 rotates, and the pulley rolls along the track path of the fourth track part 15512, thereby driving the transmission shaft to reciprocate, and the second transmission connection arm 15532 is sleeved on the transmission shaft, so the second transmission connection arm 15532 swings periodically around the transmission shaft, and the fourth transmission rod unit 15531 is movably connected with the second transmission connection arm 15532 through a connecting member. Under the action of the periodic swing of the second transmission connection arm 15532, the fourth transmission rod unit 15531 performs periodic motion. In addition, a clutch unit 16 is provided, and its specific structure is the same as the aforementioned clutch unit 16 mechanism. The fourth transmission rod unit 15531 is connected to the sliding seat 162. If the battery tab is skewed, the clutch unit 16 can be used to control the fourth transmission rod unit 15531 to be unable to transmit, thereby making it impossible for the cap pushing assembly 82 to push the cap and the tab to be pressed together, and the two cannot be welded, thereby avoiding defective welding products.

[0057] like Figure 12 to Figure 14As shown, the cap pushing assembly 82 includes a first pushing unit 821 and a second pushing unit 822, and the fourth transmission rod unit 15531 is connected to the second pushing unit 822. The first pushing unit 821 includes a push rod 8211, a push rod driving arm 8212, and a third elastic component 8213. The third elastic component 8213 can be a spring. The third elastic component 8213 is connected to the push rod driving arm 8212, and the push rod driving arm 8212 is connected to the push rod 8211. The second pushing unit 822 is provided with a push block 8221, and the push rod driving arm 8212 is arranged on the moving path of the push block 8221. When the second pushing unit 822 moves forward in the second direction, the push block 8221 abuts against the push rod driving arm 8212, and the push rod driving arm 8212 rotates along its rotation axis, so that the push rod 8211 retreats to the cap pushing position along the first direction, and the cap is transported to the pushing position in the moving direction of the push rod through the feeding mechanism. The push rod driving arm 8212 stretches the third elastic component 8213 during the rotation process. When the second pushing unit 822 retreats in the second direction, the push block 8221 gradually separates from the push rod driving arm 8212. Under the elastic force of the third elastic component 8213, the push rod 8211 moves in the first direction, pushing the cap at the pushing position to a position opposite to the pole ear in the first direction. When the cap is pushed to a position opposite to the pole ear by the push rod 8211, the second pushing unit 822 moves in the second direction under the drive of the fourth transmission rod unit 15531 to abut against the cap, and then continues to push the cap to the clamping position to cooperate with the pole ear.

[0058] like Fig.15 and Fig.16As shown, the third pressing transmission unit 1554 includes a third transmission connecting arm 15541 and a fifth transmission rod unit 15542. The third transmission connecting arm 15541 is connected to the fifth transmission rod unit 15542. A pulley is provided at one end of the third transmission connecting arm 15541. The pulley is connected to the fifth track portion 15513. When the third driving wheel 1551 rotates, the pulley rolls along the fifth track portion 15513, and the third transmission connecting arm 15541 swings with the pulley to drive the fifth transmission rod unit 15542 to move periodically. The fifth transmission rod unit 15542 is connected to the pressing assembly 83. A pressing member with a through hole is provided at the end of the pressing assembly 83. The fifth transmission rod unit 15542 can drive the pressing assembly 83 to move along the second direction. After the cap and the pole ear reach the pressing position and match, the pressing member moves along the second direction close to the pole ear, and cooperates with the cap pushing assembly 82 to press the pole ear and the cap. A laser (not shown in the figure) is provided on one side of the clamping member. The laser can be made by using existing technology. When the tab and the cap are pressed tightly, the laser emits laser light, which passes through the through hole and irradiates the tab to complete the welding of the tab and the cap. In this embodiment, two groups of battery caps and tabs can be welded each time, so the cap pushing assembly 82 includes two groups of first pushing units 821 and second pushing units 822, and two groups of fourth transmission rod units 15531 connected to the second pushing units 822 are also provided.

[0059] like Figure 1 and Figure 2 As shown, a second tab alignment mechanism 7 is provided downstream of the tab wiping mechanism 5 to correct the tab after wiping again to avoid tab position deviation caused by abnormal wiping or abnormal conveying process, which may cause poor welding after the battery is conveyed to the tab welding mechanism 8.

[0060] like Fig.19As shown, the pulling test mechanism 10 includes a second support frame, a clamping and stretching component 101 slidably arranged on the second support frame through a linear slide rail, a fourth transmission component 156 includes a fourth driving wheel 1561 sleeved on the driving shaft 152, and a first stretching transmission unit 1562 connected to the clamping and stretching component 101, the fourth driving wheel 1561 is provided with a seventh track portion 15611, if the fourth driving wheel 1561 is a round wheel, the seventh track portion 15611 is a track groove opened on the side of the round wheel, if the fourth driving wheel 1561 is a cam, the seventh track portion 15611 is a contour surface of the cam, the seventh track portion 15611 is designed with a motion path according to the required operating sequence, the first stretching transmission unit 1562 is connected to the seventh track portion 15611, the fourth driving wheel 1561 rotates to make the seventh track portion 15611 rotate synchronously, and the seventh track portion 15611 drives the clamping and stretching component 101 to rise and fall periodically. After the tab and the cap are welded, the strength of the welding is tested by the pull test mechanism 10. When the welded battery is moved to the pull test mechanism 10, the fourth driving wheel 1561 drives the clamping and stretching assembly 101 to descend through the first stretching transmission unit 1562, and clamps the cap to perform a tensile test according to a preset tensile force. If the cap is not broken under the set tensile force value, the battery is qualified, and if the cap is broken, the battery is unqualified.

[0061] like Fig.19 As shown, the first stretching transmission unit 1562 includes a third swing arm 15621 and a sixth transmission rod unit 15622. A pulley is provided in the middle of the third swing arm 15621. One end of the third swing arm 15621 is fixed by a pin, and the other end is connected to the sixth transmission rod unit 15622. The pulley is connected to the seventh track portion 15611. When the fourth driving wheel 1561 rotates, the pulley rolls along the track path of the seventh track portion 15611, thereby driving the third swing arm 15621 to swing periodically around the pin. The third swing arm 15621 is movably connected to the sixth transmission rod unit 15622 through a connecting member. During the swinging process of the third swing arm 15621, the sixth transmission rod unit 15622 is driven to perform periodic motion. The sixth transmission rod unit 15622 is connected to the clamping and stretching assembly 101. Under the drive of the sixth transmission rod unit 15622, when the battery reaches the pull-out test mechanism 10, the clamping and stretching assembly 101 descends and clamps the cap and performs a test according to a predetermined tensile force. In this embodiment, the tension test of two groups of batteries can be completed each time, so two groups of clamping and stretching components 101 can be arranged in parallel.

[0062] like Fig.18As shown, a solder joint detection mechanism 9 is arranged between the tab welding mechanism 8 and the pulling test mechanism 10, and the solder joint detection mechanism 9 includes a CCD camera module 91 and a backlight source 92; the position of the cap solder joint is detected in real time by the CCD camera module 91 and the backlight source 92, and it is determined whether the position of the end cap solder joint is qualified, so as to avoid the outflow of defective products.

[0063] like Fig. 20 and Fig.21 As shown, a tab bending mechanism 12 and a cap closing mechanism 13 are arranged downstream of the pull-out test mechanism 10 to press and assemble the cap of the battery after the tab welding is completed. The tab bending mechanism 12 includes a tab bending driver 121, a bending block 122 connected to the tab bending driver 121, a cap pressing driver 123, and a pressing block 124 connected to the output end of the cap pressing driver 123; both the tab bending driver 121 and the cap pressing driver 123 use a driving cylinder. When the battery moves to the tab bending mechanism 12, the tab bending driver 121 drives the bending block 122 to bend the tab of the cap, and at this time the cap changes from a vertical state to a nearly horizontal state, and then the cap pressing driver 123 drives the pressing block 124 to press the cap, further bend the tab, and initially close the cap to the end of the battery. In this embodiment, the tab bending mechanism 12 can complete the synchronous bending of two battery tabs, so the tab bending driver 121, the bending block 122 connected to the tab bending driver 121, the cap pressing driver 123, and the pressing block 124 connected to the output end of the cap pressing driver 123 are all provided in two groups. The cap closing mechanism 13 includes a clamping assembly 131 for clamping the battery, and a sealing assembly 132. The clamping assembly 131 includes a clamping driver 1311 arranged on both sides of the circulating conveyor line 2, and a clamping block 1312 connected to the output end of the clamping driver 1311; the sealing assembly 132 includes a sealing driver 1321 arranged above the circulating conveyor line 2, and a pressure head 1322 connected to the sealing driver 1321; the clamping driver 1311 and the sealing driver 1321 both use a driving cylinder. When the battery moves to the cover closing mechanism 13, the clamping drive 1311 drives the clamping block 1312 to clamp the battery from both sides, and the sealing and pressing drive 1321 drives the pressing head 1322 to press the cap down to press the cap to the end of the battery. In this embodiment, the cover closing mechanism 13 can complete the pressing of two battery caps, so two groups of clamping components 131 and sealing and pressing components 132 are provided.

[0064] like Fig.11As shown, it also includes a first defective rejection mechanism 6 and a second defective rejection mechanism 11; the first defective rejection mechanism 6 is located between the tab wiping mechanism 5 and the tab welding mechanism 8, and the first defective rejection mechanism 6 is used to reject the batteries that are unqualified by the first tab alignment mechanism 4 on the circulating conveyor line 2; the second defective rejection mechanism 11 is located between the drawing test mechanism 10 and the tab bending mechanism 12, and the second defective rejection mechanism 11 is used to reject the batteries that are unqualified by the drawing test mechanism 10 on the circulating conveyor line 2. By setting the first defective rejection mechanism 6, the batteries with poor tab alignment are rejected from the circulating conveyor line 2 before the tab welding, so as to avoid flowing to the later process and intercept the defective work-in-progress from the process; by setting the second defective rejection mechanism 11, the defective welding products are rejected from the circulating conveyor line 2 to avoid the outflow of defective products, and the rejected defective products are repaired to reduce defective waste. The first defective rejection mechanism 6 includes a defective temporary storage line 61 located on one side of the circulating conveyor line 2 and a push-down line assembly 62 located on the other side of the circulating conveyor line. The push-down line assembly 62 includes a driving cylinder and a push-down clamp connected to the output end of the driving cylinder. When the defective battery moves to the first defective rejection mechanism 6, the driving cylinder drives the push-down clamp to push the battery to the defective temporary storage line 61. In this embodiment, two defective batteries can be pushed down the line at the same time, so two groups of push-down line assemblies 62 are arranged in parallel. The second defective rejection mechanism 11 is similar in structure to the first defective rejection mechanism 6, and will not be described in detail here.

[0065] like Fig. 22 As shown, the overall structure of the unloading mechanism 14 is similar to that of the first defective rejection mechanism 6. The unloading mechanism 14 includes a discharge conveyor line 141 located on one side of the circulating conveyor line and a push-down line assembly located on the other side of the circulating conveyor line 2. The structure of the push-down line assembly of the unloading mechanism 14 is the same as that of the push-down line assembly 62 of the first defective rejection mechanism 6, which will not be repeated here. The push-down line assembly pushes the battery from the circulating conveyor line 2 to the discharge transmission line, and the discharge conveyor line transports the battery to the docking equipment of the next process.

[0066] The present invention also provides a working method of a lithium battery cover welding device, which uses the lithium battery cover welding device and specifically includes the following steps: S1: The battery to be processed is automatically transferred to the circulation conveyor line 2 through the loading mechanism 3; S2: The battery position angle on the circulating conveyor line 2 is adjusted by rotating the first tab alignment mechanism 4 so that the tab of the battery is at a preset position angle; S3: The tab is clamped by the clamping assembly 51 of the tab wiping mechanism 5 and pulled up, so that the cleaning paper tape on the clamping assembly 51 rubs against the tab to clean the tab; S4: The batteries that have not been aligned by the first tab alignment mechanism 4 are transferred from the circulation conveying line 2 to the defective temporary storage line 61 by the first defective rejection mechanism 6; S5: Rotate and adjust the battery position angle on the circulating conveyor line 2 through the second tab alignment mechanism 7 so that the tab of the battery is at a preset position angle; S6: The tab welding mechanism 8 delivers the cap and presses the cap and the tab together, and welds the cap and the tab together by laser; S7: Detect the position of the cap welding point in real time through the CCD camera module 91 of the welding point detection mechanism 9, and determine whether the position of the cap welding point is qualified; S8: clamping the cap by the clamping and stretching assembly 101 of the pulling test mechanism 10 to perform a tensile test; S9: The batteries that fail the tensile test are transferred from the circulation conveying line 2 to the defective temporary storage line through the second defective rejection mechanism 11; S10: bending the tabs of the qualified battery by the tab bending mechanism 12, and initially closing the caps to the ends of the battery; S11: Pressing the cap into the end of the battery through the cover closing mechanism 13 to form a finished battery; S12: The finished batteries are transferred off the circulating conveyor line 2 through the unloading mechanism 14.

[0067] In the description of the present invention, it should be understood that terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0069] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery cap welding device, comprising a frame and a circulating conveyor line arranged on the frame for conveying batteries, characterized in that: It also includes a loading mechanism, a first tab alignment mechanism, a tab wiping mechanism, a tab welding mechanism, a drawing test mechanism, a loading mechanism and a multi-station transmission mechanism which are sequentially arranged on the circulating conveying line along the battery conveying direction; The multi-station transmission mechanism includes a driving unit, a driving shaft connected to the driving unit, a first transmission assembly, a second transmission assembly, a third transmission assembly, and a fourth transmission assembly. The driving unit drives the driving shaft to rotate, and then drives the first tab alignment mechanism, the tab wiping mechanism, the tab welding mechanism and the pulling test mechanism to perform periodic actions respectively through the first transmission assembly, the second transmission assembly, the third transmission assembly and the fourth transmission assembly.

2. The lithium battery cover welding equipment according to claim 1, characterized in that: The pole ear wiping mechanism includes a clamping assembly, the second transmission assembly includes at least one second driving wheel sleeved on the driving shaft, and a first clamping transmission unit and a second clamping transmission unit connected to the clamping assembly, at least one of the second driving wheels is provided with a first track portion and a second track portion, and the first clamping transmission unit and the second clamping transmission unit are respectively connected to the first track portion and the second track portion.

3. The lithium battery cap welding equipment according to claim 1, characterized in that: The tab welding mechanism includes a battery lifting assembly, a cap pushing assembly and a clamping assembly, the third transmission assembly includes at least one third driving wheel sleeved on the driving shaft, and a first lifting transmission unit, a second pushing transmission unit and a third clamping transmission unit respectively connected to the battery lifting assembly, the cap pushing assembly and the clamping assembly; at least one of the third driving wheels is provided with a third track portion, a fourth track portion and a fifth track portion, and the first lifting transmission unit, the second pushing transmission unit and the third clamping transmission unit are respectively connected to the third track portion, the fourth track portion and the fifth track portion.

4. The lithium battery cover welding equipment according to claim 1, characterized in that: The tab wiping mechanism and / or the tab welding mechanism is provided with a clutch unit, which includes a base, a sliding seat slidably arranged on the base, a slider slidably arranged under the sliding seat, a rotating block rotatably arranged between the sliding seat and the slider, a claw rotatably arranged on the base, and a sliding driving member driven and connected to the slider; the sliding seat is connected to the multi-station transmission mechanism, one end of the rotating block is movably engaged with the sliding seat, and the other end is abutted against the slider; the sliding driving member can drive the slider to reciprocate to drive the rotating block to rotate, so that the rotating block is separated or engaged with the sliding seat.

5. The lithium battery cap welding equipment according to claim 1, characterized in that: The first pole lug alignment mechanism includes a pole lug position sensing component, a battery rolling component, and a battery rolling support component; the first transmission component includes a first driving wheel sleeved on the driving shaft, a first induction transmission unit, and a second support transmission unit, the first driving wheel is provided with a sixth track portion, and the first induction transmission unit and the second support transmission unit are connected to the sixth track portion.

6. The lithium battery cap welding equipment according to claim 5, characterized in that: It also includes a second pole lug alignment mechanism, which is located between the pole lug wiping mechanism and the pole lug welding mechanism.

7. The lithium battery cap welding equipment according to claim 1, characterized in that: The pulling test mechanism includes a clamping and stretching assembly, the fourth transmission assembly includes a fourth driving wheel sleeved on the driving shaft, and a first stretching transmission unit connected to the clamping and stretching assembly, the fourth driving wheel is provided with a seventh track portion, and the first stretching transmission unit is connected to the seventh track portion.

8. The lithium battery cap welding equipment according to claim 1, characterized in that: It also includes a welding point detection mechanism, a tab bending mechanism, and a cap closing mechanism; the welding point detection mechanism is located between the tab welding mechanism and the pulling test mechanism, and is used to detect the position of the cap welding point; the tab bending mechanism is located downstream of the pulling test mechanism, and is used to bend the tab and preliminarily close the cap on the battery end; the cap closing mechanism is located downstream of the tab bending mechanism, and is used to press the cap to the battery end.

9. The lithium battery cap welding equipment according to claim 8, characterized in that: It also includes a first defective rejection mechanism and a second defective rejection mechanism; the first defective rejection mechanism is located between the tab wiping mechanism and the tab welding mechanism; the second defective rejection mechanism is located between the pulling test mechanism and the tab bending mechanism.

10. A working method of a lithium battery cover welding device, using the lithium battery cover welding device as claimed in any one of claims 1 to 9, characterized in that: The specific steps include: S1: The batteries to be processed are automatically transferred to the circulation conveyor line through the loading mechanism; S2: Rotate and adjust the battery position angle on the conveyor line through the first tab alignment mechanism so that the tab of the battery is at a preset position angle; S3: The tab is clamped by the clamping assembly of the tab wiping mechanism and pulled up, so that the cleaning paper tape on the clamping assembly rubs against the tab to clean the tab; S4: The first defective rejection mechanism transfers the batteries that have not been aligned by the first tab alignment mechanism from the circulation conveying line to the defective temporary storage line; S5: Rotate and adjust the battery position angle on the conveyor line through the second tab alignment mechanism so that the tab of the battery is at a preset position angle; S6: The tab welding mechanism transports the cap and presses the cap and the tab together, and welds the cap and the tab together through a laser; S7: Detect the position of the cap soldering point in real time through the CCD camera module of the soldering point detection mechanism, and determine whether the position of the cap soldering point is qualified; S8: clamp the cap by the clamping and tensile assembly of the pull test mechanism to perform a tensile test; S9: The batteries that fail the tensile test are transferred from the circulation conveying line to the defective temporary storage line through the second defective rejection mechanism; S10: bending the tabs of the qualified battery by the tab bending mechanism, and initially closing the caps to the ends of the battery; S11: Pressing the cap into the end of the battery through the cover closing mechanism to form a finished battery; S12: The finished battery is transferred off the circulating conveyor line through the unloading mechanism.

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