Lithium battery processing spot welding device and method thereof

Abstract

The invention discloses a lithium battery processing spot welding device and method, and the device comprises a spot welding mechanism, and further comprises a lithium battery conveying mechanism fixed at the lower end of the spot welding mechanism; and the controller is mounted at the rear end of the lithium battery conveying mechanism. A worker inserts a lithium battery into a battery hole of the first conveying belt, clamps an electric wire of an electrode plate into an electric wire groove of the second conveying belt, enables the electrode plate to be placed on the upper portion of a negative electrode of the lithium battery, then drives the first roller to rotate through the gear motor to drive the first conveying belt to move, and enables the first roller to drive the second roller to synchronously rotate through the connecting shaft and the rotating shaft. The first conveying belt and the second conveying belt convey the lithium batteries and the electrode plates respectively, conveying is synchronous, and therefore the lithium batteries and the electrode plates are prevented from being separated, then when the lithium batteries and the electrode plates move to the position under the spot welding mechanism, the gear motor stops automatically, and then the spot welding mechanism conducts spot welding work automatically. Therefore, the lithium battery and the electrode plate do not need to be manually held by hand for spot welding.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery processing, and in particular to a lithium battery processing spot welding device and method thereof. Background Art

[0002] In the process of processing lithium batteries, spot welding equipment will be needed. During the spot welding process, the staff will clean the surface of the lithium battery end, then place the electrode sheet on the end of the lithium battery, and then send the lithium battery and the electrode sheet to the bottom of the welding head. Then, pressure is applied to make the welding head weld the electrode sheet. The surface of the electrode sheet is partially melted to form a molten core. After power is off, the pressure is maintained so that the molten core cools and solidifies under pressure to form a weld. The pressure is then released and the lithium battery after welding is taken out.

[0003] Currently, when spot welding an electrode sheet with a wire to the negative flat end of a lithium battery, it is necessary to manually place the electrode sheet with a wire on the welding end of the cylindrical lithium battery, and then use the spot welding mechanism to move down to perform spot welding. This not only has slow work efficiency, but also easily causes the welding wire to come into contact with the worker's palm, which may lead to accidental injury to the worker's palm. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a lithium battery processing spot welding device and method thereof to solve the problems existing in the above-mentioned background technology.

[0005] A lithium battery processing spot welding device, comprising a spot welding mechanism, and further comprising: A lithium battery conveying mechanism, wherein the lithium battery conveying mechanism is fixed at the lower end of the spot welding mechanism; A controller, wherein the controller is installed at the rear end of the lithium battery conveying mechanism, and the lithium battery conveying mechanism is electrically connected to the spot welding mechanism through the controller; An electrode sheet conveying mechanism, wherein the electrode sheet conveying mechanism is detachably connected to the front end of the lithium battery conveying mechanism; The connecting mechanism is installed between the lithium battery conveying mechanism and the electrode sheet conveying mechanism. The electrode sheet conveying mechanism moves synchronously with the lithium battery conveying mechanism through the connecting mechanism, and is engaged while moving synchronously.

[0006] Preferably, the spot welding mechanism includes a column, a mounting seat, an actuator, a lifting plate, a guide column, a clamping device and a welding wire. The mounting seat is fixed to the upper end of the column, the actuator is fixedly mounted on the upper end of the mounting seat, the lifting plate is slidably connected to the inner side of the mounting seat, the output end of the actuator passes through the upper end of the mounting seat and is fixed to the upper end of the lifting plate, the guide column has a pair and is fixed on both sides of the lower end of the lifting plate, the lower end of the guide column movably passes through the lower end of the mounting seat, the clamping device is fixed at the lower end of the guide column, and the welding wire is installed in the clamping device.

[0007] Preferably, the lithium battery conveying mechanism includes a side panel, a reduction motor, a conveyor belt, a roller and a support platform. The side panel has a pair and is arranged front to back. The rear side panel is fixed to the lower end of the column. The roller has a pair and is rotatably connected to the left and right sides between the side panels. The reduction motor is fixedly installed on the rear end of the side panel, and the output shaft of the reduction motor is fixed to one of the rollers. The conveyor belt is connected between the rollers. A plurality of battery holes are equidistantly opened on the surface of the conveyor belt. The support platform is fixed in the middle between the side panels.

[0008] Preferably, a transverse groove is opened at the upper end of the support platform, a pair of clamping strips are symmetrically and movably connected on the front and rear sides of the transverse groove, a spring 1 is connected between the clamping strip and the inner wall of the transverse groove, and an arc-shaped rubber strip is fixed to the end of the clamping strip away from the spring 1.

[0009] Preferably, the controller is fixed to a rear end of the side panel at the rear, a circle of magnetic grating grooves is opened on the outer wall of one of the rollers, an annular magnetic grating is fixed inside the magnetic grating groove, the outer end surface of the annular magnetic grating does not protrude from the notch of the magnetic grating groove, a magnetic head assembly is fixed on one side of the support platform, the magnetic head assembly includes a circuit board fixed to the support platform and a magnetic head embedded and fixed on the circuit board, the magnetic head is arranged adjacent to the annular magnetic grating, the circuit board is connected to the controller signal, and the controller is respectively connected to the reduction motor and the actuator signal.

[0010] Preferably, the electrode sheet conveying mechanism comprises two side plates, a rotating shaft, two rollers and two conveyor belts. The two side plates have a pair and are distributed front to back. The two side plates at the rear are detachably connected to the one side plate at the front. The two rotating shafts have a pair and are rotatably connected on both sides between the two side plates. The two rollers have a pair and are fixed one-to-one on the outside of the rotating shaft. The two conveyor belts are connected between the two rollers. A plurality of wire grooves are equidistantly provided on the surface of the two conveyor belts. The number and distribution of the wire grooves correspond one-to-one to the number and distribution of the battery holes. Both sides of the inner wall of the groove of the wire groove are provided with protrusions.

[0011] Preferably, the connecting mechanism includes a connecting shaft, a pulley, an I-shaped connecting block and a pull rope, and the connecting shaft has a pair of connected shafts that are fixed at the front end of the roller one in a one-to-one manner, and the front part of the connecting shaft movably passes through the front side plate one, a boss is provided on the front surface of the connecting shaft, a slot is provided at the rear end of the rotating shaft, a groove is provided on the inner wall of the slot, the rotating shaft is plugged into the slot, and the boss is plugged into the groove.

[0012] Preferably, the front end of the front side panel 1 is provided with a slide groove 1, and the rear end of the rear side panel 2 is provided with a T-shaped slide groove 2, the I-shaped connecting block is slidably connected between the slide groove 1 and the slide groove 2, and the upper and lower ends of the inner walls of the slide grooves 1 and 2 are provided with side grooves, the convex edge of the I-shaped connecting block is slidably connected to the side grooves, the rope pulleys are a pair of and are correspondingly sleeved on the outside of the connecting shaft, the pull ropes are a pair of and are correspondingly wound around the outside of the rope pulleys, and the ends of the pull ropes are fixed to the surface of the I-shaped connecting block.

[0013] Preferably, the inner wall of the rope pulley is provided with a circle of annular groove, the outside of the connecting shaft is fixed with an annular boss, the annular boss is located inside the annular groove and is movably connected to the annular groove, a lower triangular bar is fixed to the outer wall of the annular boss, a receiving groove is provided on the inner wall of the annular groove, a guide groove is provided at the bottom of the receiving groove, a guide rod is slidably connected inside the guide groove, an upper triangular bar is fixed at the end of the guide rod, a spring 2 is connected between the upper triangular bar and the bottom of the receiving groove and located on the outside of the guide rod, and the inclined surface of the upper triangular bar matches the inclined surface of the lower triangular bar.

[0014] A lithium battery processing spot welding method, based on the above-mentioned lithium battery processing spot welding device, specifically comprises the following steps: S1. Insert the lithium battery to be spot welded into the battery hole of conveyor belt 1, insert the positive electrode protrusion of the lithium battery into the transverse groove, and clamp the positive electrode protrusion of the lithium battery with two clamping bars; S2, insert the wire of the electrode sheet into the wire slot of the second conveyor belt, and place the electrode sheet on the upper end of the negative electrode plane of the lithium battery; S3, the reduction motor drives roller 1 to rotate forward, roller 1 drives conveyor belt 1 to move rightward, roller 1 drives roller 2 to rotate forward synchronously through the connecting shaft and the rotating shaft, so that conveyor belt 1 and conveyor belt 2 move synchronously; S4, the roller rotates forward and drives the annular magnetic grid to rotate, the magnetic head assembly senses the change of magnetic field and outputs electrical signals to the controller; S5, the lithium battery and the electrode sheet are synchronously transported to the right to the bottom of the spot welding mechanism, the controller receives the electrical signal of the magnetic head assembly, controls the reduction motor to stop for 10 seconds, and controls the actuator to extend to drive the welding wire to move down for spot welding for 10 seconds; S6. After 10 seconds, the controller controls the reduction motor to continue to start forward rotation, and at the same time controls the actuator to shorten and drive the welding wire to move up and reset, completing the spot welding.

[0015] The beneficial effects of the present invention are as follows: 1. Workers insert the lithium battery into the battery holes of conveyor belt 1, clip the wire of the electrode plate into the wire groove of conveyor belt 2, and place the electrode plate above the negative electrode of the lithium battery. Then, the reduction motor drives roller 1 to rotate, driving conveyor belt 1 to move. Roller 1 drives roller 2 to rotate synchronously through the connecting shaft and the rotating shaft, so that conveyor belt 1 and conveyor belt 2 transport the lithium battery and the electrode plate respectively. However, the transportation is synchronous, so as to prevent the separation of the lithium battery and the electrode plate. Then, when the lithium battery and the electrode plate move to directly below the spot welding mechanism, the reduction motor automatically stops. Subsequently, the spot welding mechanism automatically performs spot welding work. In this way, there is no need for workers to hold the lithium battery and the electrode plate for spot welding by hand. Workers only need to continuously place the lithium battery and the electrode plate, thereby improving the efficiency of spot welding and enhancing safety at the same time; 2. By setting the lithium battery conveying mechanism and the electrode plate conveying mechanism in an assembled form, it is convenient to assemble and disassemble the lithium battery conveying mechanism and the electrode plate conveying mechanism. During the assembly process, only need to align the connecting shaft and insert it into the slot, and at the same time align the I-shaped connecting block and insert it into the left part of chute 2. In this way, when the connecting shaft rotates clockwise to drive the rotating shaft to rotate, it can also drive the rope wheel to rotate by the upper triangular bar and the lower triangular bar abutted against each other. One of the rope wheels winds up the pulling rope, and the other rope wheel unwinds the pulling rope. In this way, the winding of the pulling rope can use the pulling rope to pull the I-shaped connecting block to slide to the right along chute 2, making the insertion part of the I-shaped connecting block and the left part of chute 2 misaligned, so that the I-shaped connecting block and chute 2 cannot be separated. In this way, when transporting the lithium battery and the electrode plate, the adjacent side plate 1 and side plate 2 can be clamped at the same time. When disassembling, only need to make the connecting shaft rotate counterclockwise, so that the other pulling rope pulls the I-shaped connecting block to align with the insertion part of the left part of chute 2, so as to facilitate the assembly and disassembly of the lithium battery conveying mechanism and the electrode plate conveying mechanism. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the whole of the present invention; Figure 2 It is a schematic diagram of the disassembly of the lithium battery conveying mechanism and the electrode plate conveying mechanism of the present invention; Figure 3 For the present invention Figure 2 Partial enlarged view of A; Figure 4 For the present invention Figure 2 Partial enlarged view of B; Figure 5 It is a schematic cross-sectional view of the rope wheel of the present invention; Figure 6 For the present invention Figure 5 Partial enlarged view of C; Figure 7 It is a schematic diagram of the rear end of the electrode plate conveying mechanism of the present invention; Figure 8 It is a schematic partial cross-sectional view of the lithium battery conveying mechanism of the present invention; Fig. 9 It is a schematic side view of the support platform of the present invention.

[0017] In the figure: 1-spot welding mechanism, 11-column, 12-mounting seat, 13-actuator, 14-lifting plate, 15-guide column, 16-clamping device, 17-welding wire, 2-lithium battery conveying mechanism, 21-side plate 1, 211-slide 1, 22-reduction motor, 23-conveyor belt 1, 24-battery hole, 25-roller 1, 251-magnetic grid groove, 26-support table, 261-transverse groove, 262-clamping bar, 263-spring 1, 27-magnetic head assembly, 28-annular magnetic grid, 3- Controller, 4-electrode sheet conveying mechanism, 41-side plate two, 411-slide groove two, 42-rotating shaft, 421-slot, 43-roller two, 44-conveyor belt two, 45-wire groove, 451-protrusion, 5-connecting mechanism, 51-connecting shaft, 52-ropes, 53-type connecting blocks, 54-pull ropes, 55-annular grooves, 551-storage grooves, 552-spring two, 553-guide grooves, 554-guide rods, 555-upper triangular strips, 56-annular bosses, 561-lower triangular strips. DETAILED DESCRIPTION

[0018] See also Figure 1-Figure 2 A lithium battery processing spot welding device includes a spot welding mechanism 1, the spot welding mechanism 1 includes a column 11, a mounting seat 12, an actuator 13, a lifting plate 14, a guide column 15, a clamping device 16 and a welding wire 17, the mounting seat 12 is fixed to the upper end of the column 11, the actuator 13 is fixedly mounted on the upper end of the mounting seat 12, the lifting plate 14 is slidably connected to the inner side of the mounting seat 12, the output end of the actuator 13 passes through the upper end of the mounting seat 12 and is fixed to the upper end of the lifting plate 14, the guide column 15 has a pair of and is fixed to the lifting plate 1 On both sides of the lower end, the lower end of the guide column 15 movably penetrates the lower end of the mounting seat 12, the clamping device 16 is fixed at the lower end of the guide column 15, the welding wire 17 is installed in the clamping device 16, and through the actuator 13, the actuator 13 is an electric push rod or a cylinder. The actuator 13 can drive the lifting plate 14 to move up and down, so that the lifting plate 14 drives the clamping device 16 to move up and down through the guide column 15, and the clamping device 16 drives the welding wire 17 to move up and down, so that the welding wire 17 can be conveniently lowered for spot welding and then raised after spot welding.

[0019] See also Figure 1-Figure 8 , a lithium battery processing spot welding device, further comprising: The lithium battery conveying mechanism 2 is fixed at the lower end of the spot welding mechanism 1. The lithium battery conveying mechanism 2 includes a side plate 21, a reduction motor 22, a conveyor belt 23, a roller 25 and a support platform 26. The side plate 21 has a pair and is arranged front and back. The rear side plate 21 is fixed to the lower end of the column 11. The roller 25 has a pair and is rotatably connected to the left and right sides between the side plates 21. The reduction motor 22 is fixedly installed at the rear end of the rear side plate 21. The output shaft of the reduction motor 22 is fixed to one of the rollers 25. The conveyor belt 23 is connected between the rollers 25. The surface of the conveyor belt 23 A plurality of battery holes 24 are opened at equal intervals, and the support platform 26 is fixed in the middle between the side plates 21. By inserting the lithium battery into the leftmost battery hole 24 of the conveyor belt 23, the positive electrode of the lithium battery with the protruding part faces downward, and the negative electrode plane end faces upward, when the reduction motor 22 drives the roller 25 to rotate clockwise, the roller 25 drives the conveyor belt 23 to move from left to right, thereby driving the lithium battery to move from left to right until it moves to the bottom of the spot welding mechanism 1. After the spot welding is completed, the conveyor belt 23 continues to move right to the reverse process, and the lithium battery will fall down with the spot-welded electrode sheet, so that a collection container can be placed under the conveyor belt 23 to collect the spot-welded lithium batteries; Controller 3, the controller 3 is installed at the rear end of the lithium battery conveying mechanism 2, the lithium battery conveying mechanism 2 is electrically connected to the spot welding mechanism 1 through the controller 3, the controller 3 is fixed to the rear end of the side plate 21 at the rear, one of the rollers 25 has a circle of magnetic grid grooves 251 on the outer wall, an annular magnetic grid 28 is fixed inside the magnetic grid groove 251, the outer end surface of the annular magnetic grid 28 does not protrude from the notch of the magnetic grid groove 251, a magnetic head assembly 27 is fixed on one side of the support platform 26, the magnetic head assembly 27 includes a circuit board fixed to the support platform 26 and a magnetic head embedded and fixed on the circuit board, the magnetic head is arranged adjacent to the annular magnetic grid 28, the circuit board is connected to the controller 3 signal, the controller 3 is respectively connected to the reduction motor 22 and the actuator 13 signal, when the roller 25 rotates clockwise, it can drive the annular magnetic grid 28 to rotate at the same time, the magnetic head assembly 27 senses the magnetic The field changes and outputs an electrical signal to the controller 3, because the roller 1 25 rotates clockwise for one circle, which is just equal to one battery hole 24 moving away from the bottom of the spot welding mechanism 1, until the other battery hole 24 moves into the bottom of the spot welding mechanism 1, that is, the roller 1 25 rotates clockwise for one circle, which just corresponds to the distance between the centers of the two battery holes 24, and the roller 1 25 rotates clockwise for one circle, and the distance that the conveyor belt 1 23 moves is equal to the distance between the centers of the two battery holes 24. In this way, when the controller 3 receives the signal from the magnetic head assembly 27 that the annular magnetic grid 28 rotates for one circle, the controller 3 controls the reduction motor 22 to stop for 10 seconds, and at the same time controls the execution device 13 to drive the welding wire 17 to descend for spot welding for 10 seconds. After 10 seconds, the controller 3 continues to control the reduction motor 22 to rotate forward, and at the same time controls the execution device 13 to drive the welding wire 17 to rise. During the 10-second spot welding process, the worker can load new lithium batteries and electrode sheets to be spot welded; The electrode sheet conveying mechanism 4 is detachably connected to the front end of the lithium battery conveying mechanism 2. The electrode sheet conveying mechanism 4 includes side plates two 41, a rotating shaft 42, rollers two 43, and a conveyor belt two 44. There are a pair of side plates two 41, which are distributed front and back. The rear side plate two 41 is detachably connected to the front side plate one 21. There are a pair of rotating shafts 42, which are respectively rotatably connected to both sides between the side plates two 41. There are a pair of rollers two 43, which are fixedly arranged on the outside of the rotating shafts 42 in one-to-one correspondence. The conveyor belt two 44 is connected between the rollers two 43. A plurality of wire grooves 45 are equidistantly arranged on the surface of the conveyor belt two 44. The number and distribution of the wire grooves 45 correspond to the number and distribution of the battery holes 24 one by one. The wires of the electrode sheets are inserted into the wire grooves 45. Since protrusions 451 are provided on both sides of the inner wall of the notch of the wire groove 45, the width of the notch of the wire groove 45 is smaller than the width in the middle of the wire groove 45. Therefore, when the wires are inserted into the wire groove 45, they will be clamped by the protrusions 451, so as to limit the wires of the electrode sheets. The electrode sheets are placed on the upper part of the negative electrode of the lithium battery. In this way, when the rotating shaft 42 rotates clockwise, it can drive the roller two 43 to rotate clockwise, so as to make the conveyor belt two 44 convey the electrode sheets to the right; The connecting mechanism 5 is installed between the lithium battery conveying mechanism 2 and the electrode sheet conveying mechanism 4. The electrode sheet conveying mechanism 4 moves synchronously with the lithium battery conveying mechanism 2 through the connecting mechanism 5 and is clamped while moving synchronously. The connecting mechanism 5 includes connecting shafts 51, rope wheels 52, I-shaped connecting blocks 53, and pulling ropes 54. There are a pair of connecting shafts 51, which are fixedly arranged on the front ends of the rollers one 25 in one-to-one correspondence. The front part of the connecting shaft 51 movably penetrates through the front side plate one 21. A boss is provided on the surface of the front part of the connecting shaft 51. A slot 421 is opened at the rear end of the rotating shaft 42. A groove is opened on the inner wall of the slot 421. The rotating shaft 42 is inserted into the slot 421. The boss is inserted into the groove. When installing the lithium battery conveying mechanism 2 and the electrode sheet conveying mechanism 4, it is necessary to align the connecting shaft 51 with the slot 421 of the rotating shaft 42 and align the boss with the groove, and then insert the connecting shaft 51 into the slot 421 and the boss into the groove. In this way, when the roller one 25 rotates clockwise, it can drive the connecting shaft 51 to rotate clockwise, and the connecting shaft 51 drives the rotating shaft 42 to rotate clockwise, and the rotating shaft 42 drives the roller two 43 to rotate clockwise. In this way, even if the conveyor belt one 23 and the conveyor belt two 44 convey the lithium battery and the electrode sheet respectively, the conveying is synchronous, so as to prevent the separation of the lithium battery and the electrode sheet.

[0020] Please refer to Figure 8-Figure 9A transverse groove 261 is formed at the upper end of the support platform 26, and a pair of clamping strips 262 are symmetrically and movably connected on the front and rear sides of the transverse groove 261. A spring 263 is connected between the clamping strip 262 and the inner wall of the transverse groove 261, and an arc-shaped rubber strip is fixed to the end of the clamping strip 262 away from the spring 263. After the positive protruding end of the lithium battery is inserted downward into the battery hole 24, its protruding end will be inserted into the transverse groove 261 of the support platform 26, and the lithium battery will fall on the support platform 26. At this time, the positive protruding end of the lithium battery will push open the arc surface of the arc-shaped rubber strip, and the clamping strip 262 will squeeze the spring 263. In this way, the two clamping strips 262 can be used to clamp the positive protruding end of the lithium battery to limit the lithium battery. When the lithium battery moves to the right to leave the support platform 26, the positive protruding end of the lithium battery will also slide out of the transverse groove 261.

[0021] See also Figure 1-Figure 7The front end of the side plate 1 21 in the front is provided with a slide groove 1 211, and the rear end of the side plate 2 41 in the rear is provided with a T-shaped slide groove 2 411. The I-shaped connecting block 53 is slidably connected between the slide groove 1 211 and the slide groove 2 411. The upper and lower ends of the inner walls of the slide groove 1 211 and the slide groove 2 411 are provided with side grooves. The convex edge of the I-shaped connecting block 53 is slidably connected with the side grooves. The rope pulley 52 has a pair of corresponding sleeves on the outside of the connecting shaft 51. The pull rope 54 has a pair of corresponding windings on the outside of the rope pulley 52. ​​The end of the pull rope 54 is fixed to the surface of the I-shaped connecting block 53. The inner wall of the rope pulley 52 has a circle The annular groove 55, the connecting shaft 51 is externally fixed with an annular boss 56, the annular boss 56 is located inside the annular groove 55 and is movably connected to the annular groove 55, the outer wall of the annular boss 56 is fixed with a lower triangular bar 561, the inner wall of the annular groove 55 is provided with a receiving groove 551, the bottom of the receiving groove 551 is provided with a guide groove 553, the guide groove 553 is internally slidably connected with a guide rod 554, the end of the guide rod 554 is fixed with an upper triangular bar 555, a spring 2 552 is connected between the upper triangular bar 555 and the bottom of the receiving groove 551 and located outside the guide rod 554, the inclined surface of the upper triangular bar 555 is connected to the lower triangular bar 553, and the lower triangular bar 553 is connected to the lower triangular bar 553. The inclined surface of the triangular strip 561 matches, and when the connecting shaft 51 is plugged into the slot 421, the front end of the I-shaped connecting block 53 located on the left side of the slide groove 211 can also be inserted into the left notch of the slide groove 2 411. In this way, when the roller 25 rotates clockwise to transport the lithium battery and the electrode sheet to the right, the connecting shaft 51 can also drive the annular boss 56 to rotate clockwise, thereby driving the lower triangular strip 561 to perform a clockwise circular motion. When the lower triangular strip 561 and the inclined surface of the upper triangular strip 555 are against each other, because the I-shaped connecting block 53 can slide to the right along the slide groove 211 and the slide groove 2 411 at this time, the lower triangular strip 561 and the upper triangular strip 555 are connected. The rope pulley 52 is driven to rotate clockwise by the contact of 555. The rope pulley 52 on the left rotates clockwise to unwind the pull rope 54 on the left, and the rope pulley 52 on the right rotates clockwise to rewind the pull rope 54 on the right. In this way, the pull rope 54 on the right can pull the I-type connection block 53 to slide rightward along the slide groove 1 211 and the slide groove 2 411, so that the I-type connection block 53 is misaligned with the notch on the left side of the slide groove 2 411, so that the I-type connection block 53 and the slide groove 2 411 cannot be separated front and back. In this way, while the conveyor belt 1 23 and the conveyor belt 2 44 move synchronously to transport lithium batteries and electrode sheets, the adjacent side plate 1 21 and the side plate 2 41 can also be clamped. When the I-shaped connecting block 53 slides to the right along the sliding groove 1 211 and the sliding groove 2 411 to the end, as the I-shaped connecting block 53 abuts against the right ends of the inner walls of the sliding groove 1 211 and the sliding groove 2 411, the lower triangular prism 561 pushes the inclined surface of the upper triangular prism 555, so that the upper triangular prism 555 moves into the storage groove 551 to squeeze the second spring 552, and when the lower triangular prism 561 moves to no longer abut against the upper triangular prism 555, the second spring 552 pops out the upper triangular prism 555. Therefore, even if the lower triangular prism 561 continues to move in a clockwise circular motion, the upper triangular prism 555 can be pushed into the storage groove 551 and then popped out because the connecting block 53 abuts against the right ends of the inner walls of the sliding groove 1 211 and the sliding groove 2 411, thus not affecting the continuous clockwise circular motion of the lower triangular prism 561. When the lithium battery conveying mechanism 2 and the electrode sheet conveying mechanism 4 need to be removed, because the reduction motor 22 can also be connected to an external manual switch, the reduction motor 22 only needs to be reversed to make the lower triangular bar 561 move in a counterclockwise circle until it is against the plane of the upper triangular bar 555, which can drive the pulley 52 to rotate counterclockwise. The counterclockwise rotation of the left pulley 52 will reel in the pull rope 54 on the left, and the counterclockwise rotation of the right pulley 52 will unwind the pull rope 54 on the right. The pull rope 54 on the left can pull the I-type connecting block 53 to move left and align with the left notch of the slide groove 411, and then the electrode sheet conveying mechanism 4 can be removed forward, thereby facilitating the assembly and disassembly of the lithium battery conveying mechanism 2 and the electrode sheet conveying mechanism 4.

[0022] See also Figure 1-Figure 9 A lithium battery processing spot welding method, based on the above-mentioned lithium battery processing spot welding device, specifically includes the following steps: S1. Insert the lithium battery to be spot welded into the battery hole 24 of the conveyor belt 1 23, insert the positive electrode protrusion of the lithium battery into the transverse groove 261, and at the same time, two clamping bars 262 clamp the positive electrode protrusion of the lithium battery; S2, insert the wire of the electrode sheet into the wire slot 45 of the conveyor belt 2 44, and place the electrode sheet on the upper end of the negative electrode plane of the lithium battery; S3, the reduction motor 22 drives the roller 1 25 to rotate forward, and the roller 1 25 drives the conveyor belt 1 23 to move rightward. The roller 1 25 drives the roller 2 43 to rotate forward synchronously through the connecting shaft 51 and the rotating shaft 42, so that the conveyor belt 1 23 and the conveyor belt 2 44 move synchronously; S4, the roller 25 rotates forward and drives the annular magnetic grid 28 to rotate, and the magnetic head assembly 27 senses the change of the magnetic field and outputs an electrical signal to the controller 3; S5, the lithium battery and the electrode sheet are synchronously transported to the right to the bottom of the spot welding mechanism 1, the controller 3 receives the electrical signal of the magnetic head assembly 27, controls the reduction motor 22 to stop for 10 seconds, and controls the actuator 13 to extend and drive the welding wire 17 to move downward for spot welding for 10 seconds; S6. After 10 seconds, the controller 3 controls the reduction motor 22 to continue to start forward rotation, and at the same time controls the execution device 13 to shorten and drive the welding wire 17 to move upward and reset, thereby completing the spot welding.

[0023] Working principle: insert the lithium battery into the leftmost battery hole 24 of the conveyor belt 1 23, with the positive electrode of the lithium battery with the protruding part facing downward and the negative electrode flat end facing upward, and the protruding end will be inserted into the horizontal groove 261 of the support platform 26, and the lithium battery will fall on the support platform 26. At this time, the protruding end of the positive electrode of the lithium battery will push open the arc surface of the arc-shaped rubber strip, and make the clamping strip 262 squeeze the spring 1 263, so that the two clamping strips 262 can be used to clamp the positive protruding end of the lithium battery to limit the lithium battery, and then the electrode sheet can be placed on the electrode sheet. The wire is inserted into the wire slot 45, and the electrode sheet is placed on the upper part of the negative electrode of the lithium battery. Then, the reduction motor 22 drives the roller 1 25 to rotate clockwise, and the roller 1 25 drives the conveyor belt 1 23 to move from left to right, thereby driving the lithium battery to move from left to right. When the rotating shaft 42 rotates clockwise, it can drive the roller 2 43 to rotate clockwise, so that the conveyor belt 2 44 transports the electrode sheet to the right until it moves to the bottom of the spot welding mechanism 1. Because when the roller 1 25 rotates clockwise, it can drive the annular magnetic grid 28 to rotate clockwise at the same time. Rotation, the magnetic head assembly 27 senses the change of the magnetic field and outputs an electrical signal to the controller 3, and the roller 25 rotates one circle clockwise, which is just equal to the distance from one battery hole 24 moving away from the bottom of the spot welding mechanism 1 to the other battery hole 24 moving into the bottom of the spot welding mechanism 1, that is, the roller 25 rotates one circle clockwise, which just corresponds to the distance between the centers of the two battery holes 24, and the roller 25 rotates one circle clockwise, which just corresponds to the distance that the conveyor belt 23 moves, which is equal to the distance between the centers of the two battery holes 24. After moving to the bottom of the spot welding mechanism 1, the controller 3 receives the signal from the magnetic head assembly 27 that the annular magnetic grid 28 rotates one circle, and the controller 3 controls the reduction motor 22 to stop for 10 seconds, and at the same time controls the execution device 13 to drive the welding wire 17 to descend for spot welding for 10 seconds. After 10 seconds, the controller 3 continues to control the reduction motor 22 to rotate forward, and at the same time controls the execution device 13 to drive the welding wire 17 to rise. During the 10-second spot welding process, the worker can load new lithium batteries and electrode sheets to be spot welded, thereby improving the efficiency of spot welding and improving the safety of the spot welding process.

Claims

1. A lithium battery processing spot welding device, comprising a spot welding mechanism (1), characterized in that: Also includes: A lithium battery conveying mechanism (2), wherein the lithium battery conveying mechanism (2) is fixed to the lower end of the spot welding mechanism (1); A controller (3), the controller (3) being mounted at the rear end of the lithium battery conveying mechanism (2), the lithium battery conveying mechanism (2) being electrically connected to the spot welding mechanism (1) via the controller (3); An electrode sheet conveying mechanism (4), wherein the electrode sheet conveying mechanism (4) is detachably connected to the front end of the lithium battery conveying mechanism (2); A connecting mechanism (5) is installed between the lithium battery conveying mechanism (2) and the electrode sheet conveying mechanism (4); the electrode sheet conveying mechanism (4) moves synchronously with the lithium battery conveying mechanism (2) through the connecting mechanism (5), and is engaged while moving synchronously.

2. A lithium battery processing spot welding device according to claim 1, characterized in that: The spot welding mechanism (1) comprises a column (11), a mounting seat (12), an actuator (13), a lifting plate (14), a guide column (15), a clamping device (16) and a welding wire (17); the mounting seat (12) is fixed to the upper end of the column (11); the actuator (13) is fixedly mounted on the upper end of the mounting seat (12); the lifting plate (14) is slidably connected to the inner side of the mounting seat (12); the output end of the actuator (13) passes through the upper end of the mounting seat (12) and is fixed to the upper end of the lifting plate (14); the guide column (15) has a pair and is fixed to both sides of the lower end of the lifting plate (14); the lower end of the guide column (15) movably passes through the lower end of the mounting seat (12); the clamping device (16) is fixed to the lower end of the guide column (15); and the welding wire (17) is installed in the clamping device (16).

3. A lithium battery processing spot welding device according to claim 2, characterized in that: The lithium battery conveying mechanism (2) comprises a side plate (21), a reduction motor (22), a conveyor belt (23), a roller (25) and a support platform (26). The side plate (21) has a pair and is arranged in a front-to-back manner. The rear side plate (21) is fixed to the lower end of the column (11). The roller (25) has a pair and is rotatably connected to the left and right sides between the side plates (21). The reduction motor (22) is fixedly mounted on the rear end of the rear side plate (21). The output shaft of the reduction motor (22) is fixed to one of the rollers (25). The conveyor belt (23) is connected between the rollers (25). The surface of the conveyor belt (23) is provided with a plurality of battery holes (24) at equal intervals. The support platform (26) is fixed to the middle between the side plates (21).

4. A lithium battery processing spot welding device according to claim 3, characterized in that: A transverse groove (261) is formed at the upper end of the support platform (26), a pair of clamping strips (262) are symmetrically and movably connected to the front and rear sides of the transverse groove (261), a spring 1 (263) is connected between the clamping strip (262) and the inner wall of the transverse groove (261), and an arc-shaped rubber strip is fixed to one end of the clamping strip (262) away from the spring 1 (263).

5. A lithium battery processing spot welding device according to claim 3, characterized in that: The controller (3) is fixed to the rear end of the side plate (21) at the rear, and a circle of magnetic grating grooves (251) are formed on the outer wall of one of the rollers (25). An annular magnetic grating (28) is fixed inside the magnetic grating groove (251), and the outer end surface of the annular magnetic grating (28) does not protrude from the notch of the magnetic grating groove (251). A magnetic head assembly (27) is fixed to one side of the support platform (26), and the magnetic head assembly (27) includes a circuit board fixed to the support platform (26) and a magnetic head embedded and fixed on the circuit board. The magnetic head is arranged adjacent to the annular magnetic grating (28). The circuit board is signal-connected to the controller (3), and the controller (3) is signal-connected to the reduction motor (22) and the actuator (13) respectively.

6. A lithium battery processing spot welding device according to claim 3, characterized in that: The electrode sheet conveying mechanism (4) comprises a second side plate (41), a rotating shaft (42), a second roller (43) and a second conveyor belt (44). The second side plate (41) has a pair and is distributed front and back. The second side plate (41) at the rear is detachably connected to the first side plate (21) at the front. The second rotating shaft (42) has a pair and is rotatably connected to the two sides between the second side plates (41). The second roller (43) has a pair and is fixed to the outside of the rotating shaft (42) in a one-to-one correspondence. The second conveyor belt (44) is connected between the second rollers (43). A plurality of wire grooves (45) are equidistantly opened on the surface of the second conveyor belt (44). The number and distribution of the wire grooves (45) correspond to the number and distribution of the battery holes (24) in a one-to-one manner. Both sides of the inner wall of the groove of the wire groove (45) are provided with protrusions (451).

7. A lithium battery processing spot welding device according to claim 6, characterized in that: The connecting mechanism (5) comprises a connecting shaft (51), a rope wheel (52), an I-shaped connecting block (53) and a pull rope (54); a pair of connecting shafts (51) are fixed to the front end of the roller (25) in a one-to-one correspondence; the front part of the connecting shaft (51) movably penetrates the front side plate (21); a boss is provided on the front surface of the connecting shaft (51); a slot (421) is provided at the rear end of the rotating shaft (42); a groove is provided on the inner wall of the slot (421); the rotating shaft (42) is plugged into the slot (421); and the boss is plugged into the groove.

8. A lithium battery processing spot welding device according to claim 7, characterized in that: The front end of the front side plate 1 (21) is provided with a slide groove 1 (211), and the rear end of the rear side plate 2 (41) is provided with a T-shaped slide groove 2 (411). The I-shaped connecting block (53) is slidably connected between the slide groove 1 (211) and the slide groove 2 (411). The upper and lower ends of the inner walls of the slide groove 1 (211) and the slide groove 2 (411) are provided with side grooves. The convex edge of the I-shaped connecting block (53) is slidably connected with the side groove. A pair of the rope wheels (52) are sleeved on the outside of the connecting shaft (51) in a one-to-one correspondence. A pair of the pull ropes (54) are wound around the outside of the rope wheels (52) in a one-to-one correspondence. The ends of the pull ropes (54) are fixed to the surface of the I-shaped connecting block (53).

9. A lithium battery processing spot welding device according to claim 8, characterized in that: The inner wall of the rope wheel (52) is provided with a circle of annular groove (55); an annular boss (56) is fixed to the outside of the connecting shaft (51); the annular boss (56) is located inside the annular groove (55) and is movably connected to the annular groove (55); a lower triangular bar (561) is fixed to the outer wall of the annular boss (56); a receiving groove (551) is provided on the inner wall of the annular groove (55); a guide groove (553) is provided at the bottom of the receiving groove (551); a guide rod (554) is slidably connected inside the guide groove (553); an upper triangular bar (555) is fixed to the end of the guide rod (554); a second spring (552) is connected between the upper triangular bar (555) and the bottom of the receiving groove (551) and located outside the guide rod (554); the inclined surface of the upper triangular bar (555) matches the inclined surface of the lower triangular bar (561).

10. A lithium battery processing spot welding method, based on a lithium battery processing spot welding device according to any one of claims 1 to 9, characterized in that: The specific steps include: S1. Insert the lithium battery to be spot welded into the battery hole (24) of the conveyor belt 1 (23), insert the positive electrode protrusion of the lithium battery into the transverse groove (261), and simultaneously clamp the positive electrode protrusion of the lithium battery with two clamping bars (262); S2, inserting the wire of the electrode sheet into the wire slot (45) of the second conveyor belt (44), and placing the electrode sheet on the upper end of the negative electrode plane of the lithium battery; S3, the reduction motor (22) drives roller 1 (25) to rotate forward, roller 1 (25) drives conveyor belt 1 (23) to move rightward, roller 1 (25) drives roller 2 (43) to rotate forward synchronously through the connecting shaft (51) and the rotating shaft (42), so that conveyor belt 1 (23) and conveyor belt 2 (44) move synchronously; S4, the roller 1 (25) rotates forward and drives the annular magnetic grid (28) to rotate, and the magnetic head assembly (27) senses the change in the magnetic field and outputs an electrical signal to the controller (3); S5, the lithium battery and the electrode sheet are synchronously transported to the right to the bottom of the spot welding mechanism (1), the controller (3) receives the electrical signal of the magnetic head assembly (27), controls the reduction motor (22) to stop for 10 seconds, and controls the actuator (13) to extend and drive the welding wire (17) to move downward to perform spot welding for 10 seconds; S6. After 10 seconds, the controller (3) controls the reduction motor (22) to continue to start forward rotation, and at the same time controls the actuator (13) to shorten and drive the welding wire (17) to move upward and reset, thereby completing the spot welding.

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