CN108237353B

CN108237353B - End welding machine

Info

Publication number: CN108237353B
Application number: CN201810012463.8A
Authority: CN
Inventors: 雷水德; 曾庆礼; 高宜江; 孙海建; 左佰洋; 周宁宁; 杨洋; 刘成继
Original assignee: Suzhou Link Automation Technology Co Ltd
Current assignee: Suzhou Link Automation Technology Co Ltd
Priority date: 2018-01-05
Filing date: 2018-01-05
Publication date: 2020-03-17
Anticipated expiration: 2038-01-05
Also published as: CN108237353A

Abstract

Different from the prior art, the embodiment of the invention provides an end welding machine which comprises a bearing unit, a welding unit and a transfer unit, wherein a battery string is laid in the bearing area, the welding unit is arranged on one side of the bearing area, the transfer unit is arranged on one side corresponding to the welding unit and used for conveying bus bars to the welding unit, and after the bus bars are fixed by the welding unit, the bus bars in the welding area are welded through induction welding, so that the bus bars are automatically conveyed and welded, the difference of visual errors and welding quality existing in manual operation is avoided, the welding quality of the bus bars is stable, the efficiency is high, and the straight-through rate of a production line is high.

Description

End welding machine

Technical Field

The invention relates to an end welding machine, in particular to an end welding machine suitable for welding a solar cell panel.

Background

Since the advent of solar cell modules, the welding of cell string bus bars has been completed by manual operation, and the problems of unstable bus bar welding quality, low manual welding efficiency and low production line straight-through rate due to the visual error and difference of welding quality of manual operation have become a bottleneck in the packaging process of solar cell modules.

Disclosure of Invention

Therefore, it is necessary to provide an end welding machine to solve the above technical problems.

The utility model provides an end welding machine, includes bearing unit, welding unit and moves and carry the unit, bearing unit including bearing the district, bearing the district laid the battery cluster, welding unit set up in bearing district one side, including welding module and fixed module, fixed module be used for fixed busbar, welding module include power and induction coil for welding the busbar on the battery cluster, move and carry the unit setting in the one side that welding unit corresponds, be used for carrying the busbar to welding unit.

Furthermore, the bearing unit comprises a correcting device, the correcting device comprises a first correcting push plate and a second correcting push plate, the first correcting push plate is vertical to the second correcting push plate, and the correcting device further comprises a first correcting driving device and a second correcting driving device which are respectively used for driving the first correcting push plate and the second correcting push plate to move.

Furthermore, the induction coil is enclosed into a welding area, and an isolation block is arranged in the welding area.

Furthermore, the fixed module include the grudging post, the grudging post include mount, stand and depression bar, the pressure head set up on the depression bar, the pressure head mobilizable move to the weld zone direction for fixed busbar.

Furthermore, the pressing rod is movably arranged on the upright post, and a first linkage device is further arranged between the pressing rod and the upright post and used for enabling two ends of the pressing rod to synchronously move.

Furthermore, the stand movably set up on the mount, the stand have two, two stand and mount between still be provided with second aggregate unit for make two stand synchronous motion.

Furthermore, the welding unit include two sets ofly, and two sets of welding units set up respectively in the both sides of bearing the weight of the district, move and carry the unit and also include first move and carry unit and second and carry the unit, first move and carry the unit and include triaxial displacement device and set up the first grabbing device on triaxial displacement device, first grabbing device be used for snatching and releasing the busbar, triaxial displacement device be used for driving first grabbing device remove.

Furthermore, the three-axis displacement device comprises a first displacement assembly, a second displacement assembly and a third displacement assembly, and is used for driving the first grabbing device to move along a first direction, a second direction and a third direction, wherein the first direction is vertical to the second direction, and the third direction is vertical to a plane formed by the first direction and the second direction.

Furthermore, the end welding machine further comprises a picking unit, the picking unit comprises a picking and transferring device and a picking and grabbing device arranged on the picking and transferring device, the picking and transferring device comprises a picking and driving device and a picking and sliding plate arranged on the picking and driving device, and the picking and grabbing device is arranged on the picking and sliding plate and used for grabbing the battery strings.

Furthermore, the picking unit further comprises a buffer device, the buffer device is arranged on the picking sliding plate, the buffer device comprises a buffer frame, and a buffer pad is arranged on the buffer frame.

Has the advantages that: different from the prior art, the embodiment of the invention provides an end welding machine which comprises a bearing unit, a welding unit and a transfer unit, wherein a battery string is laid in the bearing area, the welding unit is arranged on one side of the bearing area, the transfer unit is arranged on one side corresponding to the welding unit and used for conveying bus bars to the welding unit, and after the bus bars are fixed by the welding unit, the bus bars in the welding area are welded through induction welding, so that the bus bars are automatically conveyed and welded, the difference of visual errors and welding quality existing in manual operation is avoided, the welding quality of the bus bars is stable, the efficiency is high, and the straight-through rate of a production line is high.

Drawings

FIG. 1 is a schematic structural diagram of an end welding machine according to an embodiment of the present invention

FIG. 2 is a schematic view of a welding simplex structure in an end welding machine according to an embodiment of the present invention

FIGS. 3a and 3b are top and back views of FIG. 2

FIG. 3C is an enlarged view of the point C in FIG. 3a

FIG. 4 is an enlarged view of the point A in FIG. 1

FIG. 5 is an enlarged view of the point B in FIG. 1

Description of the figures

Glass substrate

	11
		Battery string	12
Lead wire	13
		Bus bar	14
Welding unit	20
		Welding module	21
Power supply	210
		Support plate	211
Induction coil	212
		Isolation block	213
Welding zone	214
		Fixing module	22
Pressure head	220
		Pressure lever	221
First driving device	222
		Upright post	223
First linkage device	224
		First rack	2241
First gear	2242
		First linkage shaft	2243
Second linkage device	225
		Second rack	2251
Second gear	2252
		Second linkage shaft	2253
Fixing frame	226
		Second driving device	227
Displacement module	23
		Third driving device	231
Movable support	232
		First transfer unit	31
First transfer drive device	311
		First transfer support	312
Second transfer drive device	313
		Second transfer support	314
Third transfer drive device	315
		Third transfer support	316
First grabbing frame	317
		First suction disc	318
Second transfer unit	32
		Pickup unit	33
Pick-up driving device	331
		Pickup skateboard	332
Pick-up frame	333
		Pick up the sucking disc	334
Buffer cushion	335
		Buffer rack	336
Bearing unit	40
		Correcting device	41
First return drive device	411
		First sub-push plate	412
Second restoring drive device	413
		Second sub-push plate	414

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in the description and claims of the present disclosure do not denote any order, quantity, or mechanical connection, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "up", "down", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationship is also changed accordingly.

For convenience of description, in the following description, the terms of orientation "up" and "down" refer to the up-down direction in fig. 1, the terms of orientation "left" and "right" refer to the inner direction of the paper surface and the outer direction of the paper surface in fig. 1, and the terms of orientation "front" and "rear" refer to the left side and the right side in fig. 1.

Referring to fig. 1 to 5, the present invention provides an end welding machine for welding a bus bar 14 on a battery string 12, where the battery string 12 refers to a flat battery pack formed by laying at least one battery plate, and when the battery string 12 includes a plurality of battery plates, the battery plates are connected in series, where fig. 1 illustrates a schematic structural diagram of the end welding machine provided by an embodiment of the present invention, fig. 4 illustrates an enlarged schematic diagram of a position a in fig. 1, and fig. 5 illustrates an enlarged schematic diagram of a position B in fig. 1, and the end welding machine includes a carrying unit 40, a welding unit 20, and a transferring unit.

The carrying unit 40 includes a carrying region, the carrying region is used for laying the glass substrate 11, the battery string 12 is laid on the glass substrate 11, of course, in some other embodiments, the battery string 12 may also be laid directly on the carrying region, or laid on a substrate made of other materials, such as a plastic sheet substrate.

Preferably, the supporting unit 40 includes a supporting surface, the supporting surface includes a supporting area, and it can be understood that the supporting surface is a plane to facilitate the laying of the glass substrate 11.

The carrying unit 40 may further include a conveying device for conveying the glass substrate 11 to the carrying area or conveying the glass substrate 11 on which the soldered battery string 12 is laid to a downstream direction.

Further, conveyor be belt conveyors, the plummer be conveyor belt, the loading face be the belt surface, preferably, the belt be the flat belt. More preferably, the belt conveyor includes a plurality of belts arranged in parallel and spaced apart to better support the glass substrate 11.

Further, the carrying unit 40 further includes a righting device 41 for righting the glass substrate 11 of the carrying area and the battery string 12 laid on the glass substrate 11, of course, when the battery string 12 is directly laid on the carrying area, the righting device 41 directly rights the battery string 12. The reforming means that the glass substrate 11 laid on the carrying area is aligned in parallel along a first direction and a second direction, in this embodiment, the first direction is a left-right direction, and the second direction is a front-back direction.

The correcting device 41 includes a first correcting push plate and a second correcting push plate, the first correcting push plate is perpendicular to the second correcting push plate, the first correcting push plate is used for correcting the left and right directions of the glass substrate 11, and the second correcting push plate is used for correcting the front and back directions of the glass substrate 11.

When placing glass substrate 11 at the bearer area, first push pedal of reforming moves along the left and right directions, support and push away glass substrate 11 and move, if glass substrate 11 inclines in the first push pedal of reforming towards the one end of first push pedal, the effect of frictional force and first push pedal thrust of reforming takes place to deflect between first push pedal of reforming and the bearer area, make glass substrate 11 towards the one end of first push pedal of reforming all keep in contact with first push pedal of reforming, thereby realize the reforming to glass substrate 11 left and right directions, equally, can reform through the second push pedal of reforming to glass substrate 11 back and forth direction.

Further, the first aligning pushing plate comprises a pair of first sub pushing plates 412 which are arranged oppositely, the first sub pushing plates 412 move towards the direction which is relatively close to each other, so that the pushing force is applied to the glass substrate 11 from two sides, the glass substrate 11 can be aligned in the left-right direction faster, and the second aligning pushing plate comprises a pair of second sub pushing plates 414 which are arranged oppositely, and the glass substrate 11 can be aligned in the front-back direction fast.

Further, the first sub-pushing plate 412 includes a plurality of first sub-pushing blocks arranged at intervals, and the second sub-pushing plate 414 includes a plurality of second sub-pushing blocks arranged at intervals.

Further, the correcting device 41 further includes a first correcting driving device 411 and a second correcting driving device 413, which are used for driving the first correcting push plate and the second correcting push plate to move respectively.

The first restoring driving device 411 and the second restoring driving device 413 may be one of an air cylinder, a hydraulic cylinder, an electric cylinder, an electromagnet, and an electromagnet.

Referring to fig. 2, fig. 3a, fig. 3b and fig. 3c, the welding unit 20 is disposed at one side of the carrying region and is used for welding the bus bars 14 on the battery strings 12, in this embodiment, the battery strings 12 include the lead wires 13, the lead wires 13 extend away from the battery strings 12, the bus bars 14 are overlapped on the lead wires 13 and welded together, and the welding unit 20 includes a welding module 21 and a fixing module 22.

The welding module 21 includes a welding region 214, when the lead 13 and the bus bar 14 are located at the welding region 214, the lead 13 and the bus bar 14 of the battery string 12 of the welding region 214 are welded, the welding module 21 includes an induction welding device, the induction welding device includes a power source 210 and an induction coil 212, and it can be understood that the welding region 214 is a region surrounded by the induction coil 212.

The power supply 210 is configured to supply a high-frequency induction current to the induction coil 212, and when the bus bar 14 is placed on the bonding region 214, an induction electromagnetic field is generated, and an induced electromotive force is generated by coupling between the bus bar 14 and the surface of the lead 13, and an induced eddy current is formed, and the eddy current generates heat to bond the bus bar 14 and the lead 13 together.

The induction welding device further comprises a carrier plate 211, and the induction coil 212 is arranged on the carrier plate 211 and used for carrying the lead 13 and the bus bar 14 through the carrier plate 211.

Further, the induction coil 212 is disposed along the periphery of the carrier 211.

Further, a spacer 213 is disposed in the bonding pad 214 for preventing the induction coil 212 from directly contacting the lead 13 and the bus bar 14, it can be understood that the spacer 213 is made of a heat-resistant material, and preferably, the spacer 213 is made of a ceramic material.

Further, the spacer block 213 on still be provided with the recess for through recess fixed lead 13, prevent that lead 13 from taking place the displacement when the welding, it can be understood that the recess include length direction, recess length direction is on a parallel with lead 13 length direction, in addition the recess runs through the spacer block 213 width along its length direction, in order to make things convenient for fixed lead 13.

Further, the minimum height of the isolation block 213 should be larger than the maximum height of the induction coil 212 to prevent the lead wires 13 from directly contacting the induction coil 212.

Further, the power supply 210 includes a capacitive element.

The fixing module 22 is adjacent to the welding module 21, and is used for applying pressure to the bus bar 14 to fix the bus bar 14 on the lead 13 during welding so as to facilitate welding.

The fixed module 22 includes a ram 220, and the ram 220 is movable toward the bonding pad 214 to press the bus bar 14 against the lead 13 of the battery string 12. Preferably, the pressing head 220 is an elastic body, and the elastic body may be a rubber body, a plastic body, or the like.

The fixing module 22 comprises a vertical frame, the pressure head 220 is arranged on the vertical frame, the vertical frame comprises a fixing frame 226, a vertical column 223 and a pressure rod 221, the pressure rod 221 comprises a length direction, the length direction of the pressure rod 221 is parallel to the first direction of the bearing area, and the pressure head 220 is arranged on the pressure rod 221.

Further, the pressing head 220 has a plurality of pressing heads, so that the pressing head 220 can simultaneously apply pressure to a plurality of bus bars 14, fix a plurality of bus bars 14 or apply pressure to a plurality of positions of one bus bar 14, so that one bus bar 14 is uniformly stressed.

Further, the plurality of pressing heads 220 are arranged on the pressing rod 221 at equal intervals along the length direction of the pressing rod 221, so that the bus bar 14 is uniformly stressed.

In addition, in some other embodiments, the plurality of pressing heads 220 are adjustable along the length of the pressing rod 221, so as to flexibly set the position of the bus bar 14.

The pressing rod 221 can move towards the welding region 214, so that the pressing head 220 can fix the bus bar 14 on the lead 13 of the battery string 12, and the problem of poor welding and the like caused by unexpected movement of the bus bar 14 in the welding process can be prevented.

Furthermore, the pressing rod 221 is movably arranged on the upright column 223, the number of the upright columns 223 is two, the pressing rod 221 comprises two opposite ends, and the two ends of the pressing rod 221 are movably arranged on the two upright columns 223.

And a first driving device 222 for driving the pressing rod 221 to move towards the welding region 214, further, the first driving device 222 includes a pair of first sub-driving mechanisms respectively disposed on the two columns 223, the first sub-driving mechanisms are used for respectively driving the two ends of the pressing rod 221 to move towards the welding region 214, so that the pressing rod 221 and the pressing head 220 disposed on the pressing rod 221 move towards the welding region 214 to fix the bus bar 14.

The first sub-driving mechanism is a cylinder, a hydraulic cylinder, an electric cylinder, an electromagnet and the like.

It is understood that the first driving device 222 can drive the pressing rod 221 to move away from the bonding pad 214 in addition to driving the pressing rod 221 to move toward the bonding pad 214, so that there is enough space between the bonding pad 214 and the pressing head 220 to place the lead 13 and the bus bar 14 of the battery string 12 between the pressing head 220 and the bonding pad 214.

It can be understood that the two ends of the pressing rod 221 should move synchronously to prevent the pressing rod 221 from being damaged due to inconsistent movement of the two ends of the pressing rod 221 or causing inconsistent pressure applied by the pressing head 220 to the lead 13 of the battery string 12, which results in poor welding.

Preferably, a first linkage 224 is further disposed between the pressing rod 221 and the upright 223, so that the two ends of the pressing rod 221 keep moving synchronously, the first linkage 224 includes a first rack 2241, a first gear 2242 and a first linkage 2243, the first rack 2241 is disposed on the upright 223, it can be understood that the first rack 2241 includes a pair, the pair of first racks 2241 is disposed on the two uprights 223 respectively, the first gear 2242 is engaged with the first rack 2241, similarly, the first gear 2242 has a pair, the pair of first gears 2242 is disposed at the two ends of the first linkage 2243, the pressing rod 221 is connected to the first linkage 2243, it can be understood that the length direction of the pressing rod 221 is parallel to the length direction of the first linkage 2243.

Preferably, the two first toothed wheels 2242 arranged at the two ends of the first linkage shaft 2243 have the same number of teeth and the same modulus, and because the first toothed wheels 2242 at the two ends are linked through the first linkage shaft 2243, the two first toothed wheels 2242 always keep synchronous rotation, and the movement rates at the two ends of the pressure lever 221 keep consistent.

Further, a first guiding mechanism is disposed between the pressing rod 221 and the upright column 223, and is used for making the pressing rod 221 move more stably along a predetermined direction, the predetermined direction is a direction close to the welding region 214, and the first guiding mechanism includes a guide rail guide groove mechanism, a guide wheel guide groove mechanism, a guide post guide hole mechanism, and the like.

Further, the fixing module 22 further includes a translation device for moving the pressing head 220 in a direction away from the welding region 214 along a horizontal direction, so that a larger placing space is provided between the pressing head 220 and the carrier plate 211, the pressing head 220 is prevented from shielding the carrier plate 211, and the battery string 12 and the bus bar 14 are conveniently placed on the carrier plate 211.

Specifically, the upright column 223 is movably disposed on the fixing frame 226, and the second driving device 227 is disposed between the upright column 223 and the fixing frame 226, and is used for driving the bracket to move along the horizontal direction.

The second driving device 227 comprises a pair of second sub-driving mechanisms, and the pair of second sub-driving mechanisms are respectively connected with the two upright posts 223 and are used for driving the two upright posts 223 to move along the horizontal direction.

It is understood that the second sub-driving mechanism may be one of a pneumatic cylinder, a hydraulic cylinder, an electric cylinder, and an electromagnet.

It will be appreciated that the two posts 223 are moved synchronously to prevent the compression bar 221 from being damaged due to inconsistent movement of the two ends of the posts 223 or the compression bar 221 from being unable to maintain a direction parallel to the first direction of the load bearing area. The translation device further includes a second linkage 225 for keeping the two ends of the column 223 moving synchronously, and the second linkage 225 includes a second rack 2251, a second gear 2252 and a second linkage 2253.

The second rack 2251 is disposed on the fixing frame 226, and it is understood that the second rack 2251 includes a pair, the second gear 2252 is engaged with the second rack 2251, the second gear 2252 has a pair, and the pair of second gears 2252 is disposed at both ends of the second link 2253, and the column 223 is connected to the second link 2253.

Preferably, the two second gears 2252 disposed at both ends of the second link 2253 have the same number of teeth and the same module, and since the second gears 2252 at both ends are linked by the second link 2253, the two second gears 2252 always rotate synchronously, and the moving rates of the two columns 223 are kept the same.

Further, a second guiding mechanism is disposed between the upright 223 and the fixing frame 226, and is configured to enable the upright 223 to move more stably along a predetermined direction, where the predetermined direction is a horizontal direction, and the second guiding mechanism includes a guide rail and guide groove mechanism, a guide wheel and guide groove mechanism, a guide post and guide hole mechanism, and the like. Specifically, in this embodiment, the guiding mechanism includes a second guiding rail disposed at one end of the upright 223 and a second guiding groove disposed on the fixing frame 226, the second guiding rail includes a length direction, the second guiding rail is matched with the second guiding groove, and the second guiding rail is accommodated in the second guiding groove, so that the upright 223 moves along the length direction of the second guiding rail.

In addition, the welding module 21 is disposed on the fixing frame 226, so that the welding module 21 and the fixing module 22 are formed as a whole, and the pressing head 220 is convenient to fix the bus bar 14.

Further, the fixing frame 226 is provided with a plurality of sets of welding modules 21, so that one fixing module 22 can fix the bus bar 14 of the welding region 214 on a plurality of welding modules 21 at the same time, for example, in the embodiment, the welding unit 20 includes three sets of welding modules 21 and one fixing module 22.

Further, in order to enable the welding module 21 to weld a wider range of the battery strings 12, the welding unit 20 includes a displacement module 23 for driving the welding module 21 and the fixing module 22 to move.

The displacement module 23 includes a third driving device 231 and a movable bracket 232 connected to the third driving device 231, and the fixed bracket 226 is disposed on the movable bracket 232. The third driving device 231 includes a movable end, and the movable end moves in a predetermined direction, so as to move the movable bracket 232 and the fixed frame 226 and the welding module 21 and the fixed module 22 disposed on the fixed frame 226.

The third driving device 231 may be an electric cylinder, an air cylinder, a hydraulic cylinder, an electromagnet, a linear motor, or the like.

Further, the welding units 20 include two sets, and the two sets of welding units 20 are respectively disposed on two sides of the carrying area, for example, in the present embodiment, a set of welding units 20 is respectively disposed on the left and right sides of the carrying area.

A transfer unit is arranged at the upstream of the welding unit 20, and the transfer unit is arranged at one side of the bearing area and is used for conveying the bus bar 14 to the welding area 214 of the welding unit 20. It can be understood that, when the welding units 20 are respectively disposed on the left and right sides of the carrying area, the transfer units also include two sets, and the transfer units are disposed corresponding to the welding units 20 on the corresponding side.

In the present embodiment, there are two sets of the welding units 20, and there are two sets of the transfer units, which are the first transfer unit 31 disposed on the left side of the loading area and the second transfer unit 32 disposed on the right side of the loading area.

Referring to fig. 4, the first transfer unit 31 includes a three-axis displacement device for gripping the bus bar 14 and releasing the bus bar 14 at the welding region 214, and a first grasping device disposed on the three-axis displacement device for driving the first grasping device to move to the bus bar 14 placement region and the welding region 214, and the three-axis displacement device includes a first displacement assembly, a second displacement assembly, and a third displacement assembly, so that the first grasping device can move in a first direction, a second direction, and a third direction, thereby facilitating the first grasping device to grip the bus bar 14 and release the bus bar 14. The first direction is the front-back direction, the second direction is the left-right direction, the third direction is the up-down direction, wherein the first direction is vertical to the second direction, and the third direction is vertical to the plane formed by the first direction and the second direction.

Specifically, the first displacement assembly includes a first transfer support 312 and a first transfer driving device 311, the first transfer driving device 311 includes a movable end moving along a first direction, the first transfer support 312 is connected to the movable end, and when the movable end moves, the first transfer support 312 moves along the first direction.

The second displacement member includes a second transfer support 314 and a second transfer driving device 313, the second displacement member is disposed on the first transfer support 312, and when the first transfer support 312 moves in the first direction, the second displacement member also moves in the first direction, the second transfer driving device 313 includes a movable end that moves in the second direction, the second transfer support 314 is connected to the movable end, and when the movable end moves, the second transfer support 314 moves in the second direction.

The third displacement assembly includes a third transfer support 316 and a third transfer driving device 315, the third displacement assembly is disposed on the second transfer support 314, when the first transfer support 312 moves along the first direction, the third displacement assembly also moves along the first direction, when the second transfer support 314 moves along the second direction, the third displacement assembly also moves along the second direction, the third transfer driving device 315 includes a movable end moving along the third direction, the third transfer support 316 is connected to the movable end, and when the movable end moves, the third transfer support 316 moves.

The first gripping device is provided on the third transfer rack 316 so that when the first transfer rack 312 moves in the first direction, the first gripping device also moves in the first direction, when the second transfer rack 314 moves in the second direction, the first gripping device also moves in the second direction, and when the third transfer rack 316 moves in the third direction, the first gripping device also moves in the third direction, so that the first gripping device can be arbitrarily moved in the three-dimensional space formed by the first, second, and third directions, thereby precisely moving the first gripping device to the bus bar 14 placement area and the welding area 214.

Preferably, the first transfer driving device 311, the second transfer driving device 313, and the third transfer driving device 315 are one of an air cylinder, an electric cylinder, a hydraulic cylinder, and a linear motor. More preferably, the first transfer driving device 311, the second transfer driving device 313, and the third transfer driving device 315 are electric cylinders, and the displacement accuracy of the electric cylinders is 0.5mm or less, more preferably 0.2mm or less, and still more preferably 0.05mm or less.

The first grasping device is used for grasping the bus bar 14 and releasing the bus bar to the welding zone 214, and the first grasping device includes a first grasping rack 317 and a first suction pad 318 disposed on the first grasping rack 317, and it is understood that the first grasping device further includes a negative pressure providing device for providing a negative pressure to the first suction pad 318, and the negative pressure providing device may be a vacuum pump.

Alternatively, the first grasping means may grasp the bus bar 14 by, for example, a holding means.

Further, the first suction pad 318 is provided in plural to grip the plurality of bus bars 14 at the same time, or to grip a plurality of positions of the bus bars 14.

Further, the plurality of first suction cups 318 are arranged at equal intervals along the first direction of the carrying area.

It is understood that the second transfer unit 32 has a similar structure to the first transfer unit 31, and is not described herein again.

Referring also to fig. 5, further, the end welding machine further includes a pick-up unit 33 for lifting the battery string 12 so that the bus bar 14 can be placed under the battery string 12.

It is understood that the pick-up unit 33 is disposed adjacent to the transfer unit, the pick-up unit 33 includes a pick-up and transfer device and a pick-up and grabbing device disposed on the pick-up and transfer device, the pick-up and transfer device includes a pick-up driving device 331 and a pick-up sliding plate 332 disposed on the pick-up driving device 331, the pick-up and grabbing device is disposed on the pick-up sliding plate 332, the pick-up driving device 331 includes a movable end, the pick-up sliding plate 332 is connected to the movable end, and when the movable end moves, the pick-up sliding plate 332 moves, so that the pick-up and grabbing device moves.

The picking and grabbing device is used for lifting the battery string 12, the picking and grabbing device comprises a picking frame 333 and a picking sucker 334 arranged on the picking frame 333, and it can be understood that the picking and grabbing device further comprises a negative pressure supply device used for supplying negative pressure to the picking sucker 334, and the negative pressure supply device can be a vacuum pump.

Further, the plurality of picking suction cups 334 are used for grabbing a plurality of positions of the battery strings 12 to prevent the battery strings 12 from being damaged.

Further, the plurality of pickup chucks 334 are arranged equidistantly along the first direction of the loading area.

Further, the pick-up suction cup 334 is disposed corresponding to the first suction cup 318.

Further, the picking unit 33 further includes a buffer device for preventing other regions of the battery string 12 from being touched to damage the battery string 12 during the picking process, the buffer device is linked with the picking and picking device, preferably, the buffer device is also disposed on the picking slide 332, the buffer device includes a buffer frame 336, a buffer pad 335 is disposed on the buffer frame 336, and the buffer pad 335 is disposed corresponding to the picking suction cup 334 for preventing the battery string 12 from being damaged during the picking and releasing of the battery string 12.

In addition, other modifications within the spirit of the invention will occur to those skilled in the art, and it is understood that such modifications are included within the scope of the invention as claimed.

Claims

1. An end welding machine comprises a bearing unit, a welding unit and a transfer unit, and is characterized in that the bearing unit comprises a bearing area, a battery string is laid in the bearing area, the welding unit is arranged on one side of the bearing area and comprises a welding module and a fixing module, the fixing module is used for fixing a bus bar, the welding module comprises a power supply and an induction coil and is used for welding the bus bar on the battery string, the transfer unit is arranged on one side corresponding to the welding unit and is used for conveying the bus bar to the welding unit, the welding module comprises a welding area, the welding area is an area surrounded by the induction coil, the welding module further comprises a support plate, the induction coil is arranged on the support plate, the fixing module comprises a vertical frame and a pressure head, the vertical frame comprises a fixing frame, a vertical column and a pressure rod, and the pressure head is arranged on the pressure rod, the pressing rod can move towards the welding area and is used for enabling the pressing head to fix the bus bar, the stand column is movably arranged on the fixed frame, the second driving device is arranged between the stand column and the fixed frame and is used for driving the stand column to move along the horizontal direction, the welding unit comprises a displacement module and is used for driving the welding module and the fixed module to move, the displacement module comprises a third driving device and a movable support connected with the third driving device, the fixed frame is arranged on the movable support, the transferring unit comprises a first transferring unit, the first transferring unit comprises a three-axis displacement device and a first grabbing device arranged on the three-axis displacement device, the first grabbing device comprises a first sucking disc, the first grabbing device comprises a first grabbing frame and a first sucking disc arranged on the first grabbing frame, the end welding machine further comprises a picking unit, wherein the picking unit is used for lifting the battery string to enable the bus bar to be placed below the battery string, the picking unit is arranged adjacent to the transferring unit, the picking unit comprises a picking and grabbing device, the picking and grabbing device comprises a picking frame and a picking sucker arranged on the picking frame, and the picking sucker is arranged corresponding to the first sucker.

2. The end welding machine as claimed in claim 1, wherein the carrying unit comprises a righting device, the righting device comprises a first righting push plate and a second righting push plate, the first righting push plate is perpendicular to the second righting push plate, and the righting device further comprises a first righting driving device and a second righting driving device for driving the first righting push plate and the second righting push plate to move respectively.

3. The end-welding machine as claimed in claim 1, wherein said welding zone is provided with a spacer.

4. The end welding machine as claimed in claim 3, wherein a first linkage device is further provided between the pressing rod and the vertical column for synchronizing the movement of both ends of the pressing rod.

5. The end welding machine as claimed in claim 4, wherein there are two of said columns, and a second linkage is provided between said two columns and the fixing frame for synchronizing the movement of said two columns.

6. The end welding machine as claimed in claim 1, wherein said welding units comprise two sets, and two sets of welding units are respectively disposed at both sides of the carrying area.

7. The end welder of claim 6, wherein the three axis displacement device comprises a first displacement assembly, a second displacement assembly, and a third displacement assembly for driving the first gripper to move in a first direction, a second direction, and a third direction, wherein the first direction is perpendicular to the second direction, and the third direction is perpendicular to a plane formed by the first direction and the second direction.

8. The end welding machine as claimed in claim 7, wherein said pick-up unit comprises a pick-up transfer device and a pick-up and pick-up device disposed on the pick-up transfer device, said pick-up transfer device comprises a pick-up driving device and a pick-up slide plate disposed on the pick-up driving device, said pick-up and pick-up device is disposed on the pick-up slide plate for picking up the battery string.

9. The end welding machine as claimed in claim 8, wherein said pick-up unit further comprises a buffer device, said buffer device is disposed on the pick-up slide, said buffer device comprises a buffer frame, and a buffer pad is disposed on said buffer frame.